WO2015075773A1

WO2015075773A1 - Trolley truck pantograph device

Info

Publication number: WO2015075773A1
Application number: PCT/JP2013/081157
Authority: WO
Inventors: 仁海大嶋; 秋野　真司; 弘昌小河原; 村上　治; 大内　実; 光隆志岐; 博之金澤
Original assignee: 日立建機株式会社; 株式会社日立パワーソリューションズ
Priority date: 2013-11-19
Filing date: 2013-11-19
Publication date: 2015-05-28

Abstract

A trolley truck pantograph device is equipped with a pantograph device mounted on a truck and is constructed so as to be able to travel in either a trolley mode in which the truck travels using power obtained from an overhead line or a non-trolley mode in which the truck travels without obtaining the power from the overhead line. The pantograph device comprises: a base frame; a lower arm attached to the base frame through a swinging support axis so as to freely swing; an upper arm attached to the top side of the lower arm through a connection axis so as to freely swing; a collector shoe supported on the top side of the upper arm and collecting electricity from the overhead line; an actuator attached to the base frame and used for raising and lowering the lower arm; and a buffer material installed between the base frame and the lower arm, supporting the lower arm when the pantograph device is folded, and acting so as to prevent the vibration of the pantograph device.

Description

Pantograph device for trolley truck

The present invention relates to a pantograph device for a trolley truck used for ore transportation in a large-scale mine, and in particular, a trolley mode that travels with electric power obtained from an overhead line and an engine ( It is suitable as a pantograph device for an ultra-large trolley type dump truck that travels in combination with a non-trolley mode that travels with electric power obtained by driving a generator with a motor.

When a trolley type dump truck used for ore transportation in a large-scale mine runs under trolley mode in trolley mode, the pantograph is raised and brought into contact with the overhead line to receive electric power. When traveling under this overhead line, if the posture of the dump truck is disturbed, it may cause separation, so the road surface is maintained as flat as possible.

Also, when traveling in a non-trolley mode away from the overhead line and where no overhead line is laid, the pantograph is folded and the power is generated by the generator driven by the installed engine. However, the road surface where no overhead line is laid, such as a loading site or a dumping ground, is not maintained as flat as compared with the road surface where the overhead line is laid. For this reason, when traveling in a place where no overhead wire is laid, the folded pantograph is subjected to corresponding vibration due to vibration during traveling. That is, when traveling with the pantograph folded, the trolley-type dump truck receives a large vibration due to the unevenness of the road surface, and the pantograph mounted on the trolley-type dump truck also vibrates greatly.

Japanese Patent Laid-Open No. 9-261802 (Patent Document 1) discloses a current collector (pantograph device) that reliably holds a folded state against vibrations of a vehicle. In this patent document 1, a latch is provided at one end of a sliding plate holder, and a hook that engages with the latch and prevents the sliding plate from descending at a position where the sliding plate is fully raised is provided on a base frame (base frame). I have to prepare.

Another conventional technique is described in Japanese Patent Laid-Open No. 10-4604 (Patent Document 2). In this patent document 2, an arm supported by a knighthard rubber spring is provided on the upper part of a parallel link mechanism that applies a pressing force by a main spring, and a current collector boat is attached to the top of the arm. . And, for the change of the large but gentle distance between the car body and the overhead line, it follows the frame, and for the slight but sudden change, it follows the arm part, and the damping effect of Knighthard rubber Thus, the vibration of the current collector boat is suppressed.

JP-A-9-261802 Japanese Patent Laid-Open No. 10-4604

Since the thing of the said patent document 1 is a current collector of a railway vehicle, the vehicle only travels on a flat railway surface. For this reason, even with a configuration in which the base frame has a hook that engages with a latch provided at one end of the sliding plate holder and prevents the sliding plate from descending, it is possible to maintain the folded state because the vibration of the vehicle is small. It is. However, when a trolley-type dump truck used for ore transportation in a large-scale mine travels in a place where no overhead line is laid, a pantograph mounted on the trolley-type dump truck due to unevenness of the road surface, etc. Vibrates greatly. For this reason, it is not possible to suppress the vibration of the pantograph only by the engagement between the latch and the hook described in Patent Document 1, and there is a problem that the pantograph vibrates and the life of the pantograph is shortened.

In the thing of the said patent document 2, since the arm supported by the knight hart rubber spring is provided in the frame upper part, although the vibration of a current collector boat can be suppressed by the damping effect of knight hart rubber, in this patent document 2, Even if the conventional technology described is applied to a pantograph mounted on a trolley-type dump truck, it is mounted on the trolley-type dump truck due to unevenness on the road surface when traveling in a place where no overhead line is laid. However, there is a problem that the life of the pantograph is shortened.

In addition, there is a type in which the tip of the upper arm (upper frame) of the pantograph in the trolley type dump truck is fixed to the base frame by a key device. However, for example, in the case where the rear part of the pantograph is fixed with a keying device, the vibration of the front part of the pantograph on the side opposite to the keying device cannot be suppressed. Therefore, when traveling in a place where no overhead wire is laid, it is difficult to prevent the pantograph mounted on the trolley-type dump truck from vibrating due to the unevenness of the road surface, and the pantograph vibrates. There is a problem that the strength becomes insufficient and the life of the pantograph is shortened. For this reason, in order to extend the lifetime of a pantograph, excessive reinforcement is needed and the new subject that a mass increases arises.

As described above, in the case of the conventional technology, the life of the pantograph is shortened or it is necessary to provide an excessive reinforcement capable of withstanding a large vibration. When the life of a pantograph is short, the maintenance interval becomes short and time-consuming, and when the pantograph is reinforced, there is a problem that the mass increases.

An object of the present invention is to obtain a pantograph device for a trolley type truck that can extend the life of the pantograph without excessive reinforcement.

In order to achieve the above object, the present invention includes a pantograph device mounted on a truck, and can travel in either a trolley mode that travels with electric power obtained from an overhead line or a non-trolley mode that travels without obtaining electric power from an overhead line. In the trolley type truck pantograph device, the pantograph device includes a base frame, a lower arm that is swingably attached to the base frame via a swing support shaft, and a connecting shaft that is connected to the tip of the lower arm. An upper arm that is swingably attached to the upper arm, a current collecting boat that is supported on the tip of the upper arm and collects electricity from the overhead wire, and is attached to the base frame, Actuator for raising and lowering, installed between the base frame and the lower arm, the folded pantograph device And supporting the lower arm when, characterized in that it comprises a buffer material which acts to suppress the vibration of the pantograph device.

In the above, the lower arm in the vicinity of the intermediate portion between the swing support shaft that supports the base end side of the lower arm and the connecting shaft on the distal end side is brought into contact with the lower surface of the support. It is preferable that the cushioning material is installed on the base frame.

In the above, it is preferable that the base frame includes a key device for fixing the end of the upper arm to the base frame when the pantograph device is folded.

Further, in the above, the cushioning material is installed on the base frame so as to come into contact with the lower surface of the lower arm and elastically press the lower arm from below when the pantograph device is folded. It is good to configure.

Further, in the above, the cushioning material is configured in a concave shape having a concave groove, and when the pantograph device is folded, the lower arm of the pantograph device is fitted into the concave groove, and the concave groove It is also possible to elastically support the lower surface of the lower arm at the bottom portion and elastically support the side surface of the lower arm at the side portion of the concave groove.

According to the present invention, there is an effect that a pantograph device for a trolley type truck that can extend the life of the pantograph without excessive reinforcement can be obtained.

1 is a side view showing an overall configuration of a trolley type truck applied to Embodiment 1 of the present invention. The partial side view which expands and shows the front part of the trolley type truck shown in FIG. The front view of the trolley type truck shown in FIG. FIG. 2 is a perspective view of a pantograph device mounted on the trolley type truck of FIG. 1. FIG. 2 is a side view of the pantograph device mounted on the trolley type truck of FIG. 1 and shows a state in which the pantograph is folded. The front view which expands and shows the part vicinity of the buffer material in FIG.4 and FIG.5. The top view which shows the base frame in FIG.4 and FIG.5. The side view of the base frame shown in FIG. FIG. 6 is a diagram for explaining another example of the cushioning material in FIG.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. Note that, in each drawing, the portions denoted by the same reference numerals indicate the same or corresponding portions.

A first embodiment of a pantograph device for a trolley truck according to the present invention will be described with reference to FIGS.
1 is a side view showing an overall configuration of a trolley type truck applied to Embodiment 1 of the present invention, FIG. 2 is a partial side view showing an enlarged front part of the trolley type truck shown in FIG. 1, and FIG. It is a front view of the trolley type truck shown in FIG.
In this embodiment, a trolley type dump truck used for ore transportation in a large-scale mine will be described as an example.

In FIG. 1, 1 is an overhead line (trolley line) stretched on the track of a mine, 2 is a trolley-type dump truck, and this dump truck 2 has a trolley mode that runs with electric power obtained from the overhead line 1 and a motor. This is an electrically driven dump truck that can travel in any of the non-trolley modes that travel with electric power obtained by driving a generator with (engine). In this embodiment, the trolley mode and the non-trolley mode are always used separately, and particularly when climbing, the climbing speed can be improved by traveling in the trolley mode using the electric power obtained from the overhead line 1. ing. In addition, when the dump truck is used in an environment that requires a large amount of power such as a steep slope, it can be configured to run using the power obtained from the overhead line 1 and the power obtained from the engine at the same time. It is.

When the engine (usually a diesel engine) is used to drive a generator, the electricity obtained by the generator is controlled by a control device such as an inverter, and then an alternating current (AC) motor (induction motor). An AC drive system is employed in which the vehicle is driven to travel.
By adopting an IGBT (Insulated Gate Bipolar Transistor) inverter and a grid resistor, it becomes possible to exert a stronger electric brake force.

A pantograph device 3 having a pantograph that moves up and down is mounted on the front upper part of the dump truck 2. That is, a pantograph mounting base 5 is installed on the top of the pantograph support 4 provided in the front part of the dump truck 2, and current is collected from the overhead line 1 on the top of the base 5 (the front upper part of the cab 2 a). The pantograph device 3 is installed. Reference numeral 6 denotes a current collecting boat at the top of the pantograph device 3 that slides in contact with the overhead wire 1 and collects electricity from the overhead wire 1.

In addition, 7 is a cab (cab) and 8 is a deck. In this embodiment, the pantograph support 4 is installed on the deck 8. 9, 9 'are steps for a driver to get into the cab, and 10 is a handrail. *

In FIG. 2, a state in which the pantograph device 3 is folded is shown by a solid line, and a state in which the current collector boat 6 is in contact with the overhead wire 1 by raising the pantograph device 3 is shown by a two-dot chain line.
As shown in the front view of FIG. 3, in this embodiment, two pantograph devices 3 are installed, one on each of the left and right on the pantograph support 4. Further, the current collecting boats 6 of the left and right pantograph devices 3 are connected to each other by a pantograph connecting plate 11. FIG. 3 shows a state in which the pantograph device 3 is folded.

Next, the configuration of the pantograph device 3 shown in FIGS. 1 to 3 will be described in detail with reference to FIGS. 4 is a perspective view of the pantograph device mounted on the trolley type truck of FIG. 1, and FIG. 5 is a side view of the pantograph device mounted on the trolley type truck of FIG. 1, showing a state in which the pantograph is folded. 6 is an enlarged front view showing the cushioning material in FIGS. 4 and 5, FIG. 7 is a plan view showing the base frame in FIGS. 4 and 5, and FIG. 8 is a side view of the base frame shown in FIG. .

First, the overall configuration of the pantograph apparatus in the present embodiment will be described with reference to FIGS. 4 and 5. In the figure, reference numeral 12 denotes a base frame (base frame) of the pantograph device 3 attached to the gantry 5 above the pantograph support 4 shown in FIG. A base end portion 14a of a lower arm (lower frame) 14 of the pantograph device 3 is swingably attached to the upper portion of the base frame 12 via a swing support shaft 13 (see FIG. 5). Is configured to be able to undulate around the swing support shaft 13 that supports the base end portion 14a. A connecting shaft 15 is provided in parallel to the swing support shaft 13 at the tip (upper end) 14 b (see FIG. 5) of the lower arm 14, and the base of an upper arm (upper frame) 16 is provided on the connecting shaft 15. The end portion 16a is swingably connected.

The current collecting boat 6 is swingably supported by a tip end (upper end) 16b of the upper arm 16 via a boat support 6a, a boat support bar 6b, a connecting shaft 6c, and the like.
A lower balance bar (parallel link) 17 is formed so as to constitute a parallel link mechanism with the lower arm 14, and an upper balance bar (parallel link) 18 is formed so as to constitute a parallel link mechanism with the upper arm 10 (FIG. 5). Reference) is provided.

The lower balance rod 17 has a base end portion 17a rotatably attached to the base frame 12. Further, a parallel link receiver 19 is rotatably attached to the connecting shaft 15 provided at the distal end portion 14b of the lower arm 14, and the distal end portion 17b (see FIG. 5) of the lower balancing rod 17 is The parallel link receiver 19 is rotatably connected. Accordingly, the lower arm 14, the lower balancing rod 17, the base frame 12 and the parallel link receiver 19 constitute a parallel link mechanism, and the parallel link receiver 19 is always in the same posture (similarly) even when the lower arm 14 moves up and down. ).

Further, the upper balance rod 18 has a base end portion (not shown) rotatably connected to the parallel link receiver 19, and a distal end portion 18 a thereof is connected to the boat support rod 6 b of the current collector boat 6. It is rotatably connected to a provided bracket (not shown). Accordingly, the upper arm 16, the upper balance rod 18, the parallel link receiver 19 and the current collector boat 6 constitute a parallel link mechanism, and the current collector boat 6 is configured such that the lower arm 14 and the upper arm 16 are raised and lowered. Are always held in the same posture (for example, a horizontal position). Thus, the current collecting boat 6 is always held in the same posture (for example, horizontal position) regardless of whether the pantograph device 3 is moved up or down. The provided sliding plate 6e can be uniformly brought into contact with the overhead wire 1 (see FIG. 1).

20 is a hydraulic cylinder (actuator) whose proximal end is attached to the bracket 12a of the base frame 12 and whose distal end is connected to a bracket 14c provided on the lower arm 14, and when the hydraulic cylinder 20 is extended. The lower arm 14 rises (rises), and when the hydraulic cylinder 20 is contracted, the lower arm 14 falls down.

Reference numeral 21 denotes a spring for raising the upper arm 16. One end (lower end) of the spring 21 is coupled to a bracket 12b provided on the base frame 12, and the other end (upper end) is connected to the upper arm 16. An arm portion 16c that is formed integrally with the arm 16 and extends to the opposite side across the connecting shaft 15 is coupled via a spring receiving bar 16d and a spring receiving bracket 16e. In this example, the bracket 12b is installed on the side where the lower arm 14 is tilted with respect to the position of the swing support shaft 13, and the lower arm 14 is raised by the hydraulic cylinder 20 so that the spring 21 is moved. The distance between the

brackets

12b and 16e that are connected to each other is increased. Thereby, the tension generated in the spring 21 can be increased by raising the lower arm 14.

Accordingly, when the hydraulic cylinder 20 is extended and the lower arm 14 is raised upward, the spring 21 is extended and the tension is increased, whereby the arm portion 16c is pulled downward, and the connecting shaft 15 is The upper arm 16 can be raised upward as a fulcrum. That is, by raising the lower arm 14 to a predetermined position, the tension of the spring 21 is more than the rotational moment around the connecting shaft 15 due to gravity acting on the upper arm 16 (the clockwise rotational moment in FIG. 4). If the rotation moment about the connecting shaft 15 due to (the rotation moment counterclockwise in FIG. 4) is increased, the upper arm 16 is automatically moved upward in conjunction with the standing of the lower arm 14. Can be lifted.

Conversely, when the hydraulic cylinder 20 is contracted and the lower arm 14 is tilted downward, the spring 21 is also contracted and its tension is reduced. When the rotational moment around the connecting shaft 15 due to the tension of the spring 21 becomes smaller than the rotational moment around the connecting shaft 15 due to gravity acting on the upper arm 16, the upper arm 16 falls down. However, in this embodiment, an upper arm receiving portion (stopper) 19a is provided on the parallel link receiver 19, and the upper arm receiving portion 19a prevents the upper arm 16 from being directed downward from a substantially horizontal position. It is configured.

Reference numeral 16f denotes a damper bracket that is integrally attached to the arm portion 16c. Although not shown, the base end side is fixed to the base frame 12 at a damper locking portion 16g of the bracket 16f. The tip side of the damper device is attached. This damper device suppresses vibration of the upper arm 16.

Numeral 22 is a key device for fixing the current collecting boat 6 of the pantograph device 3 to the base frame 12 when the pantograph device 3 is folded and not used. As shown in FIG. 5, the key device 22 includes a key link 22b rotated by a hydraulic cylinder 22a. The hydraulic cylinder 22a is attached to a bracket 22c provided at the center of the rear end of the base frame 12. The end is pivotally attached. Further, a V-shaped receiving portion 22e is provided on the upper rear side of the base frame 12 via a base portion 22d so as to face the key link 22b.

On the other hand, a pantograph fixing pipe 16i is attached to the tip (end part) of the upper arm 16 via a bracket 16h, and this pantograph fixing pipe 16i is the above-mentioned when the pantograph device 3 is folded. It is received by a receiving portion 22e of the key device 22 provided on the base frame 12, and is pressed and fixed by a key link 22b rotated by a hydraulic cylinder 22a of the key device 22. Accordingly, the rear side of the upper arm 16 is configured to be fixed to the base frame 12.

Even when the dump truck 2 travels on a rough road surface in the non-trolley mode, this peg device 22 prevents the pantograph device 3 from being vibrated or greatly shaken to break or deform to some extent. Can do. However, even if the rear portion of the upper arm 16 is fixed to the base frame 12 by the key device 22, vibration on the front side of the pantograph device 3 (the side opposite to the key device 22) is avoided due to rough road surface unevenness. It is difficult to do. It has been found that when the front side of the pantograph device 3 vibrates, particularly a large stress is applied to the portion of the bracket 14c that becomes a connecting portion with the hydraulic cylinder 20 and the life of the pantograph device 3 is reduced.

Therefore, in this embodiment, as shown in FIGS. 4 and 5, a buffer made of an elastic material such as rubber for supporting the lower surface of the lower arm 14 near the front center of the base frame 12. A material 23 is installed. The buffer material 23 is in contact with the vicinity of an intermediate portion between the swing support shaft 13 and the connecting shaft 15 in the lower arm 14 and acts to absorb or suppress vibrations acting on the lower arm 14. . That is, when the trolley type dump truck folds the pantograph device 3 and presses the pipe 16i provided at one end thereof against the receiving portion 22e by the key link 22b of the key device 22, the center of the lower arm 14 Near the portion hits the cushioning material 23, and the cushioning material 23 acts to elastically press the lower arm 14 from below.

Therefore, the pantograph device 3 can be elastically and firmly supported by the key device 22 and the buffer material 23. As a result, even when the trolley type dump truck travels on a road with severe irregularities, the vibration of the pantograph device 3 can be absorbed or suppressed, so the portion of the bracket 14c that becomes the connecting portion with the hydraulic cylinder 20, etc. It is possible to suppress large stress from being applied to the surface. Therefore, according to the present embodiment, it is possible to obtain a trolley-type truck pantograph device that can significantly extend the life of the pantograph device 3 with a simple configuration without adding excessive reinforcement to the pantograph device 3.

FIG. 6 is an enlarged front view showing the vicinity of the cushioning material 23 in FIGS. 4 and 5. The cushioning material 23 is made of natural rubber or the like, and the shape is preferably a cylinder or a truncated cone, but the cushioning material 23 elastically supports the lower surface of the lower arm 14 to suppress the vibration of the pantograph. Any shape is possible as long as it is possible. Reference numeral 24 denotes a gate-shaped mounting base for mounting the cushioning material 23, and this mounting base 24 is attached to a mounting plate 25 attached by welding or bolts near the front center of the base frame 12 of the pantograph device 3. Installed. The mounting base 24 is also attached to the mounting plate 25 by welding or bolts. Reference numeral 26 denotes a shim for adjusting the height of the cushioning material 23, and the cushioning material 23 is attached to the mounting base 24 with the bolt 27 via the shim 26.

7 is a plan view showing the base frame 12 in FIGS. 4 and 5, and FIG. 8 is a side view of the base frame 12 shown in FIG. As shown in FIG. 7, the base frame 12 includes a front frame 12c, a rear frame 12d, and two vertical frames 12e connecting the front and

rear frames

12c and 12d. A cushioning material 23 is attached to the vicinity of the front center of the front frame 12c via the mounting plate 25 and the mounting base 24.

In the center of the rear frame 12d, an installation base 28 for installing the base portion 22d of the key device 22 is attached by welding or the like, and a rear side surface of the rear frame 12d corresponding to the installation base 28 is provided. The bracket 22c for attaching the proximal end of the hydraulic cylinder of the key device 22 is attached by welding or the like. Reference numeral 12f denotes an attachment bracket for attaching the base frame 12 of the pantograph device 3 to the mount 5 of the pantograph support 4 with a bolt or the like.

Reference numeral 29 shown in FIGS. 7 and 8 denotes a boat receiver that supports the current collecting boat 6 (see FIGS. 4 and 5) when the pantograph device 3 is folded. Two boat receivers 29 are provided on the rear frame 12d of the base frame 12 in the longitudinal direction of the current collecting boat 6 with the key device 22 interposed therebetween, and support both sides of the lower surface of the current collecting boat 6. Can be done.
4 and 5 described above, the boat receiver 29 is not shown.

FIG. 9 is an enlarged front view showing another example of the cushioning material 23 shown in FIGS. 4 to 8, which has a shape different from that of the cushioning material 23 shown in FIG. That is, the cushioning material 23 shown in FIG. 6 has a cylindrical shape or a truncated cone shape, and supports the lower surface of the lower arm 14 of the pantograph device 3 by pressing it. On the other hand, the cushioning material 30 shown in FIG. 9 is configured in a truncated cone shape, and this truncated cone-shaped cushioning material 30 is installed at the center bottom of the guide 31 whose center is a concave groove portion 31a. . The lower arm 14 of the pantograph device 3 is configured to fit into the concave groove portion 31 a of the guide 31, and the cushioning material 30 provided at the bottom of the concave groove portion 31 a of the guide 31 is used to The lower surface is pressed and elastically supported. Further, the side arm 31b of the guide 31 is configured to restrict the vibration of the lower arm 14 in the left-right direction.

Therefore, in the example shown in FIG. 9, not only the lower surface of the lower arm 14 is elastically supported, but also the displacement in the left-right direction can be restricted. Therefore, in the example shown in FIG. 9, not only the vertical vibration of the pantograph device 3 is attenuated, but also the horizontal vibration can be suppressed.
Thereby, without adding excessive reinforcement to the pantograph device 3, it is possible to more reliably suppress the vibration of the pantograph device 3 with a simple configuration, and to obtain a trolley-type pantograph device for a truck that can greatly extend the life. be able to.

As described above, according to the trolley type truck pantograph device of the present embodiment, the pantograph is installed between the base frame and the lower arm and elastically supports the lower arm when the pantograph device is folded. Since the shock absorbing material acting to suppress the vibration of the device is provided, the vibration of the pantograph device can be suppressed. In particular, since the impact force acting on the connecting portion between the lower arm and the hydraulic cylinder (actuator) can be greatly reduced, the life of the pantograph device can be greatly extended. In addition, according to the present embodiment, since excessive reinforcement is not necessary, the mass of the pantograph device can be reduced, and the effects of being easy to handle and inexpensive to manufacture can be obtained.

In addition, this invention is not limited to the Example mentioned above, Various modifications are included. For example, although the actuator for raising and lowering the lower arm 14 is configured by the hydraulic cylinder 20, the actuator is not limited to the hydraulic cylinder, and any other type of actuator may be used as long as it can raise and lower the lower arm. The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.

1: overhead line, 2: dump truck, 3: pantograph device,
4: Pantograph support, 5: Stand,
6: current collector boat, 6a: boat support, 6b: boat support rod, 6c: connecting shaft, 6d: boat, 6e: sliding plate,
7: Cab, 8: Deck, 9, 9 ': Step, 10: Handrail,
11: Pantograph connecting board,
12: Base frame (base frame), 12a, 12b: bracket,
12c: front frame, 12d: rear frame, 12e: vertical frame,
12f: Mounting bracket,
13: swing support shaft, 14: lower arm (lower frame), 14a: base end, 14b: tip
14c: bracket, 15: connecting shaft,
16: upper arm (upper frame), 16a: proximal end portion, 16b: distal end portion, 16c: arm portion,
16d: Spring support bar, 16e: Spring support bracket, 16f: Bracket for damper,
16g: damper locking part, 16h: bracket, 16i: pipe for fixing the pantograph,
17: Lower balancing rod, 17a: Base end portion, 17b: Tip portion, 18: Upper balancing rod,
19: Parallel link receiver, 19a: Upper arm receiver,
20: Hydraulic cylinder (actuator), 21: Spring,
22: Key device, 22a: Hydraulic cylinder, 22b: Key link, 22c: Bracket,
22d: base part, 22e: V-shaped receiving part,
23: cushioning material, 24: mounting base, 25: mounting plate, 26: shim, 27: bolt,
28: Installation stand, 29: Boat receiver,
30: cushioning material, 31: guide, 31a: groove portion, 31b: inside of side portion.

Claims

In a pantograph device for a trolley-type truck that is equipped with a pantograph device mounted on a truck and can travel in either a trolley mode that travels with electric power obtained from an overhead line or a non-trolley mode that travels without obtaining electric power from an overhead line,
The pantograph device
A base frame,
A lower arm that is swingably attached to the base frame via a swing support shaft;
An upper arm swingably attached to the tip of the lower arm via a connecting shaft;
A current collector boat for collecting electricity from the overhead wire supported on the tip of the upper arm;
An actuator attached to the base frame for raising and lowering the lower arm;
A cushioning material installed between the base frame and the lower arm, and supporting the lower arm when the pantograph device is folded, and acting to suppress vibration of the pantograph device. Pantograph device for trolley trucks.
2. The pantograph device for a trolley type truck according to claim 1, wherein the lower arm in the vicinity of an intermediate portion between the swing support shaft that supports the base end side of the lower arm and the connecting shaft on the tip end side. The trolley type truck pantograph device is characterized in that the cushioning material is installed on the base frame so as to contact the lower surface of the support.
2. The pantograph device for a trolley truck according to claim 1, wherein the base frame includes a key device for fixing an end of the upper arm to the base frame when the pantograph device is folded. Pantograph device for trolley trucks.
The trolley type truck pantograph device according to claim 1, wherein when the pantograph device is folded, the cushioning material is in contact with the lower surface of the lower arm and elastically presses the lower arm from below. A trolley-type truck pantograph device installed on the base frame.
2. The pantograph device for a trolley type truck according to claim 1, wherein the cushioning material is configured in a concave shape having a concave groove, and a lower arm of the pantograph device is fitted into the concave groove when the pantograph device is folded. And configured to elastically support the lower surface of the lower arm at the bottom of the groove and elastically support the side surface of the lower arm at the side of the groove. A pantograph device for trolley trucks.