JP2506901Y2 - Automatic reverse braking system for truck - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic reverse braking device for a truck equipped with a wheel supported by a bearing and traveling through a traveling device supported by a frame, and is particularly suitable for an impact test of an automobile or the like. The present invention relates to an automatic reverse braking device for a truck.

[0002]

2. Description of the Related Art A braking force is not applied when rotating in the forward direction, but braking is applied when rotating in the reverse direction. Various so-called reverse rotation preventing devices have been conventionally proposed. And a typical example is "mechanical motion mechanism" (1980,
3, 10 Gihodo Publishing Co., Ltd.), pages 212 to 213.

The reverse rotation preventing device disclosed in the above-mentioned document also has various problems although it is stopped by the braking force against the reverse rotation. For example, a brake device that prevents the reverse rotation by a ratchet mechanism has a drawback that a large impact is caused because the pawl engages the ratchet to stop the reverse rotation. In addition, when releasing the brake, the pawl has to be disengaged from the ratchet, so that there is a trouble that the pawl needs to be slightly rotated in the forward direction.

A brake, which is designed to relieve an impact at the time of stopping, is also disclosed in the above-mentioned document. That is, a brake having a rubber trochanter or a brake having a friction disc is known. Since these brakes are equipped with a rubber trochanter and a friction disc, even if the impact is small, there is a drawback that an operation such as normal rotation and disengagement of the pawl is required for releasing. There is also a drawback that the braking force cannot be adjusted. Further, Japanese Utility Model Publication No. 63-184230 discloses a braking device provided with a one-way clutch. However, in such known technology, since it is electromagnetically operated,
Inconvenience such as disconnection occurs at the time of impact, and it cannot be used for testing the cart for impact test.

[0005]

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to set the braking force of the brake device that regulates the operation of the axle when the axle rotates in the opposite direction, and is therefore suitable for use in impact tests. The purpose is to provide a trolley reverse braking device.

[0006]

SUMMARY OF THE INVENTION According to the invention, a frame (3) comprises a wheel (1) supported by bearings (2).
In an automatic reverse braking device for a bogie that travels via a traveling device (N) supported by a brake disc (1) on an axle (5) of a wheel (1) via a one-way clutch (6).
1) is provided, and a brake caliper (13) for sandwiching the brake disc (11) from both sides is pivotally mounted on a bracket (15) provided on the frame (3), and the brake caliper (13) is attached to the brake disc (11). ) Is provided at the end opposite to the side where the brake cylinder is clamped, and a piston cylinder unit (18) that operates so that the brake disc (11) is clamped by the caliper (13) is provided, and pressure oil is supplied to the piston cylinder unit (18). Manual pump (20)
Are connected by a line (23) via a regulating valve (21).

[0007]

[Description of Action and Effect] Therefore, when the axle rotates in the positive direction, the one-way clutch is off and the axle rotates freely. When rotating in the opposite direction, the one-way clutch is turned on, and the brake device restricts the operation of the one-way clutch. At this time, the braking force of the braking device is freely set and set to a predetermined value, so that the one-way clutch that is operating, that is, the reverse rotation of the axle is stopped by the set braking force. When the set value is set to zero, the brake device is released and the reverse brake is released. As described above, in the present invention, the braking force is actuated by hydraulic pressure and the braking force can be freely adjusted by the adjusting valve, so there are few failures due to the impact force at the time of impact, and the braking force is adjusted by the speed to improve the reverse running distance. Since it can be changed, it is convenient and practically effective.

[0008]

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The traveling apparatus of the cart for impact test, which is generally designated by N in FIG. 1, includes wheels 1 and 1, and two wheels 1 and 1 are shown, but these wheels and wheels not shown are bearings 2 It is rotatably supported by 2.
The traveling device N supports the frames 3 and 3.
Therefore, the frame 3 can move on the rails 4 and 4.

A one-way clutch 6 is provided at the end of the axle 5 of the wheel 1, and the brake disc 11, which is a component of the brake device 10, is also attached to the one-way clutch 6.
It is provided in. The configuration of the one-way clutch 6 is well known in the art. For example, in FIG. 1, when the carriage 3 moves in the direction of arrow A, the disk 11 is free with respect to the axle 5, but when moving in the opposite direction B, the axle 5 moves. It is designed to rotate together with.

Pads 12, 12 for holding the brake disc 11 from both sides and applying a brake are attached to brake calipers 13, 13 in detail as shown in FIG. The brake calipers 13, 13 are pivotally attached to the bracket 15 at substantially the center thereof. The bracket is fixed to the frame 3 with bolts 17. A piston cylinder unit 18 is provided at the other ends of the brake calipers 13, 13. Therefore, when pressure oil is supplied to this unit 18, the piston cylinder unit pushes the calipers 13, 13 open about the pivot point 16, and as a result, the brake pads 12, 1,
2 will clamp the brake disc 11.

A pump for supplying pressure oil to the piston cylinder unit 18 is composed of, for example, a manual pump 20. Then, the discharge line 22 has a regulating valve 21
Is installed, and the pressure oil is supplied to the piston cylinder units 18, 18 through the line 23.

FIG. 3 shows an example of a dolly D embodying the present invention. This dolly D is composed of a frame F and has a total of 4 front, rear, left and right.
A traveling device N is provided at a place.

Next, the operation of the above embodiment will be described.

The manual pump 20 is driven to supply pressure oil of a predetermined pressure to the piston cylinder units 18, 18. Since the pump is a manual pump, the desired pressure can be easily obtained, but when the pump is, for example, an electric pump, the regulating valve 21 is adjusted to set the pressure in the line 23 to a predetermined value.

When the frame, that is, the trucks 3 and 3 moves in the forward direction indicated by the arrow A in FIG. 1, the one-way clutch 6 is off and the brake disc 11 is separated from the axle 5, so that no braking force acts. Next, when the trolley moves in the opposite direction indicated by the arrow B, the one-way clutch 6 is turned on and the disc 11 rotates integrally with the axle.

By the way, according to the present embodiment, since the set pressure oil is applied to the piston cylinder units 18, 18 of the brake device 10, the brake disc 11
Is pressed by the brake pads 12, 12 at a set pressure. Therefore, the set braking force is
Work as a result, the trolley runs backward for a set distance and then stops. In addition, the piston cylinder unit 18, 18
It is clear that the braking force can be changed by changing the pressure applied to. It is also clear that the pressure oil can be discharged from the piston cylinder unit to free the disk 11.

[0018]

As described above, according to the present invention, the following excellent effects are obtained. (A) Since it is hydraulically operated, it is strong against impact force, and there is no disconnection of wiring, so it is suitable for impact tests. (B) Since the reverse running distance can be controlled by adjusting the braking force, it is convenient and less dangerous in an experiment in which the speed at impact is changed.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a brake device portion.

FIG. 3 is a plan view showing an example of a traveling device embodying the present invention.

[Explanation of symbols]

 5 ... Axle 6 ... One way clutch 10 ... Brake device 11 ... Brake disc

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryohei Yamauchi 537-2 Endo, Fujisawa City, Kanagawa Prefecture (72) Inventor Yukio Hatori 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Makoto Enomoto 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd.

Claims (1)

(57) [Scope of utility model registration request] 1. An automatic reverse braking device for a bogie, comprising a wheel (1) supported by a bearing (2) and traveling via a traveling device (N) supported by a frame (3). ), A brake disc (11) is provided on the axle (5) via a one-way clutch (6), and a bracket (15) provided on the frame (3) holds the brake disc (11) from both sides. 1
Piston cylinder unit in which 3) is pivotally mounted and the brake caliper (13) operates so that the brake disc (11) is clamped by the caliper (13) at the end opposite to the side where the brake disc (11) is clamped. (18) is provided, and a manual pump (20) for supplying pressure oil to the piston cylinder unit (18) is connected by a line (23) through a regulating valve (21) to an automatic truck. Reverse braking device.