JP3856615B2 - Braking device for vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle brake device, and more particularly to a wedge-type vehicle brake device that brakes a vehicle by inserting a wedge-shaped brake member between a brake rail disposed on the ground and a metal base fixed to a vehicle body.
[0002]
[Prior art]
A vehicle traveling on a steep slope has a rack rail laid in parallel with a traveling rail on which traveling wheels travel, and a pinion driven by a drive motor is engaged with the rack rail to perform uphill and downhill.
As a braking device for safety, there are provided a plurality of types such as a device for stall control of the drive motor, an electromagnetic brake attached to the shaft of the drive motor, a disk brake attached to the pinion shaft, and the like.
Further, an emergency braking device is provided in case the above braking devices do not operate.
[0003]
FIG. 9 shows an example of the emergency braking device, which is a so-called wedge-shaped braking device. The brake rail 8 in which a wedge-shaped brake pad 11 sliding on a wedge guide 21 via a roller 23 is laid on the ground is shown. The brake pads 11 are normally loaded with a tensile force of a tension spring 26 as shown on the lower side of the figure. It is in the pulled position and does not come into contact with the brake rail 8. On the other hand, in the event of an emergency, when the vehicle 1 is at high speed without other braking devices acting, it is detected in some way that the vehicle 1 is at high speed, and the brake pad 11 is restrained in response thereto. It will be solved. Then, the wedge-shaped brake pad 11 is pulled between the wedge guide 21 and the brake rail 8 as shown in the upper side of the drawing and bites between the wedge guide 21 and the brake rail 8, and the vehicle 1 is stopped by strongly pressing the brake rail 8.
[0004]
However, once the brake pad 11 is acted, the brake pad 11 is strongly fitted between the wedge guide 21 and the brake rail 8 by the action of the wedge. Therefore, the brake pad 11 cannot be pulled out unless the force is very large. For this reason, each part in which the wedge action is generated is disassembled to release the fitted state, and the assembly is restored and restored to the opened state. This required a lot of labor and time.
[0005]
[Problems to be solved by the invention]
In view of the above problems, an object of the present invention is to provide a wedge-shaped braking device that can be easily released from a fitted state after braking.
[0006]
[Means for Solving the Problems]
According to the present invention, in a wedge-type vehicle braking device that brakes a vehicle by fitting a wedge-shaped brake member between a brake rail disposed on the ground and a metal receiving member fixed to the vehicle body, A pair of tapered members that are in contact with each other at an inclined surface are interposed between the wedge-shaped brake members, and after braking, at least one of the tapered members is moved to increase the distance between the wedge guide and the brake rail, thereby fitting the wedge-shaped brake members. There is provided a wedge type vehicle braking device provided with a brake member fitting release means for releasing the combined state.
In the wedge type vehicle braking apparatus configured as described above, after braking, at least one of the taper members is moved by the brake member fitting release means to increase the distance between the wedge guide and the brake rail, and the wedge brake member can be easily obtained. The fitting state can be released.
[0007]
By rotating the screw of the brake member fitting release means with the screw type taper member moving means, the taper member can be easily moved to release the fitted state of the wedge-shaped brake member.
By attaching the brake member fitting release means to the taper member on the metal receiving member side, and moving the taper member on the metal receiving member side along the surface of the metal receiving member by the brake member fitting release means, the taper is obtained. The member can be moved smoothly.
If the brake member fitting release means also serves as the initial position adjusting means for the wedge guide, the operation of the brake can be stabilized.
The individual brake member fitting release means provided on the plurality of taper members can be connected so as to be operated simultaneously.
A spring member may be interposed between the metal receiving member and the wedge guide. In this case, the spring member alleviates the impact of the wedge-shaped brake member on the wedge guide.
A wedge-shaped brake member can be automatically fitted between the brake rail and the wedge guide when the vehicle speed exceeds a predetermined value.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a side view of a vehicle 1 for traveling on a steep slope provided with a wedge-shaped braking device of the present invention, and FIG. 2 is a front view taken along line II-II in FIG.
As shown in FIG. 2, the rack rail 10 and the brake rail 8 are installed in parallel with the traveling rail 30 on which the wheel 2 travels. Note that FIG. 1 shows the traveling rail 30 and the rack rail 10 on the near side removed for easy viewing.
[0009]
Four sets of driving devices and braking devices are installed on the frame 31 of the vehicle 1, and the structure thereof is the same as that of the prior art, and the pinion 3 driven by the driving motor 5 is connected to the rack rail 10. And has a stall control (not shown) of the drive motor 5, an electromagnetic brake 9, and a disc brake 4 as a normal braking device.
Two sets of wedge-shaped braking devices 40 including the features of the present invention are attached to the lower surface of the base frame 31 so as to hold the brake rails 8.
[0010]
Hereinafter, the entire system for operating the wedge brake device 40 will be described. FIG. 3 is a side view showing the entire system, and FIG. 4 is a sectional view taken along line IV-IV in FIG. 5 is a cross-sectional view taken along line VV in FIG. 3, and FIG. 6 is an enlarged view of a VI portion in FIG.
[0011]
3 and 4, a gear box 32 is attached under the vehicle 1, and a gear 33 is attached to a shaft 32 </ b> A that protrudes downward from the gear box 32 in the figure. Are engaged. Accordingly, when the vehicle 1 moves, the gear 33 rotates, and the rotation is transmitted from the gear box 32 to the shaft 32B. A pulley 20 is attached to the shaft 32B. The pulley 20 is engaged with the pulley 19 attached to the frame 31 via a belt 60, and is coaxial with the pulley 19 and perpendicular to the traveling direction. The pulley 18 is arranged in a shifted manner.
[0012]
On the other hand, referring to FIG. 5, the governor shaft 36 is supported by the frame 31, the pulley 17 is attached to the governor shaft 36, and the pulley 18 is engaged with the pulley 17 via the belt 61. . Therefore, when the gear 33 meshed with the rack rail 10 rotates, the governor shaft 36 rotates. A governor 16 having a claw 35 is attached to the governor shaft 36. When the governor shaft 36 rotates, the governor 16 also rotates. A sliding clutch 34 is splined to the governor shaft 36 so as to be slidable in the axial direction.
[0013]
As shown in FIG. 6, the sliding clutch 34 is biased leftward in the figure by a spring 36A. Normally, the claw 35 of the governor 16 is closed and the roller 16A at the left end in the figure grips the sliding clutch 34, but the speed of the vehicle 1 increases, and as a result, the speed of the governor shaft 36 has a certain value. If it exceeds, the clutch is opened by centrifugal force, and the sliding clutch 34 is moved leftward in the figure by the spring 36A.
[0014]
A transmission member 50 is rotatably attached to the left end portion of the governor shaft 36 in the figure via a bearing 36B. The clutch plate 15 is fixed to the right connecting portion 51 of the transmission member 50, and teeth 15 </ b> D and 34 </ b> D that mesh with each other when they come into contact with each other are provided on opposite end surfaces of the clutch plate 15 and the sliding clutch 34. Yes.
The left side of the transmission member 50 is formed on a shaft 52 and extends, and the shaft 52 is supported by a support member 54 fixed to the frame 31 via a bearing 52a, and a hand wheel 55 is attached to the leftmost end. Has been. The handwheel 55 is used to return the sliding clutch 34 to a position where it is gripped by the claw 35 of the governor 16 after braking.
[0015]
An eccentric plate 53 is formed between the connecting portion 51 and the shaft 52 of the transmission member 50, and one end of the rod 14 shown in FIG. 3 is connected to the outer periphery of the eccentric plate 53 via a member 56. As shown in FIG. 3, one end of the lever 13 is swingably attached to the other end of the rod 14, and the other end of the lever 13 is engaged with one end of the lever 12. The other end of the lever 12 is swingably attached to the wedge brake device 40.
[0016]
FIG. 7 is a diagram showing the details of the wedge-type braking device 40 as viewed from above the brake rail 8.
A wedge guide 21 is attached to a metal receiving member 25 fixed to the frame 31 at a portion not shown through taper spring pressing metal fittings 41, 42 and a leaf spring 24, and the wedge guide 21 is braked via a roller 23. A pad 11 is slidably attached. The metal receiving member 25, the taper members 41 and 42, the leaf spring 24, the wedge guide 21, and the brake pad 11 are sequentially attached to both side surfaces of the brake rail 8 with the brake pads 11 facing each other.
[0017]
When one end of the lever 12 in FIG. 3 moves away from the other end of the lever 13, the state shown in the lower side in FIG. 7 becomes the state shown in the upper side. That is, the brake pad 11 moves to the left by the tension spring 26, and the brake pad 11 enters between the wedge guide 21 and the brake rail 8 with the roller 23 interposed therebetween, and brakes by the wedge action.
[0018]
FIG. 8 shows a device for releasing the brake pad 11 according to the invention. The tapered spring retainer 41 on the side of the metal receiving member 25 of the pair of tapered spring retainers 41 and 42 is provided with a female screw, and a screw bracket 43 fitted thereto is fixed to the support frame 31. mounted through the holes provided in the preparative being adapted to be screwed to the male screw portion of one end thereof into the female screw can be out a tapered spring retainer member 41 by turning the other end of the threaded rod. In this example, there are two metal fittings 41 and 42 before and after the wedge guide 21 and two screw rods 43. This is connected by a connecting shaft 44 via a miter gear 45.
[0019]
Hereinafter, the operation of the apparatus configured as described above will be described in detail.
When the vehicle 1 stops at a steep slope due to a failure, the vehicle 1 can normally be stopped by stall control of the drive motor 5, operation of the electromagnetic brake 9 and the hydraulic disc brake 4.
However, if these do not operate and the vehicle speed increases, the rotational speed of the shaft 32A of the gear box 32 increases, which is transmitted to the governor shaft 36, the rotational speed of the governor 16 increases, and the claw 35 of the governor 16 increases. The sliding clutch 34 is slid in the axial direction by the spring 36A, contacts the clutch plate 15 and meshes with the teeth 15D and 34D, and the eccentric plate 53 coupled with the clutch plate 15 rotates. Move the rod 14 only.
When the rod 14 moves, the lever 13 rotates, so that the meshing of the lever 12 meshing with the lever 13 is released. When the lever 12 becomes free, the brake pad 11 is brought into the engaged state shown in the upper side from the open state shown in the lower side of FIG.
[0020]
That is, the brake pad 11 is pulled by the tension spring 26 and is fitted between the wedge guide 21 and the brake rail 8 by the movement of the vehicle 1. At this time, the brake impact is alleviated by the leaf spring 24, and when the brake pad 11 is moved, the roller 23 is sandwiched between the brake guide 11 and the brake pad 11 is easily moved. In this way, an emergency stop can be made.
[0021]
On the other hand, in order to release the fitting state of the brake pad 11 after an emergency stop, the screw pad 43 attached to the side of the metal receiving member 25 in the tapered spring presser fittings 41 and 42 is rotated to be tapered. The spring pressing metal fitting 41 is moved in the direction of the arrow along the inner surface of the metal receiving member 25. Then, the thin portion of the tapered spring pressing metal fitting 41 comes into contact with the tapered spring pressing metal fitting 42, and the distance between the metal receiving member 25 and the leaf spring 24 is reduced. As a result, the compression force of the leaf spring 24 is reduced. The brake pad 11 is released from the fitted state. In the case of this embodiment, by rotating the connecting shaft 45, the two screw shafts 43 rotate simultaneously, and the fitting state of the brake pads 11 of the two wedge braking devices 40 can be released simultaneously.
[0022]
【The invention's effect】
According to the present invention, in a wedge-type vehicle braking device that brakes a vehicle by fitting a wedge-shaped brake member between a brake rail disposed on the ground and a metal receiving member fixed to the vehicle body, A pair of taper members that are in contact with each other at an inclined surface are interposed between the wedge guides, and a brake member fitting release means is provided on at least one of the taper members. After braking, the taper member is moved so that the receiving member and the brake rail Since the distance between them can be enlarged, the fitted state of the wedge-shaped brake member can be easily released.
[Brief description of the drawings]
FIG. 1 is a side view of a vehicle provided with a braking device according to the present invention.
FIG. 2 is a front view taken along the line II-II in FIG.
FIG. 3 is an enlarged side view showing attachment of a wedge type braking device according to the present invention.
4 is a cross-sectional view taken along line IV-IV in FIG.
5 is a cross-sectional view taken along line VV in FIG. 3. FIG.
6 is an enlarged view of a VI part in FIG. 5;
7 is a cross-sectional view taken along line VII-VII in FIG.
8 is a cross-sectional view taken along line VIII-VIII in FIG.
FIG. 9 is a view showing a conventional wedge-shaped braking device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 ... Pinion 8 ... Brake rail 10 ... Rack rail 11 ... Brake pad 15 ... Eccentric plate 16 ... Governor 21 ... Wedge guide 22 ... Side guide plate 23 ... Roller 24 ... Leaf spring 26 ... Spring 36 ... Governor shaft 40 ... Wedge type Braking device 41 ... taper presser fitting 42 ... taper presser fitting 43 ... screw rod 44 ... connecting shaft 45 ... miter gear

Claims (7)

A wedge-type vehicle braking device for braking a vehicle by fitting a wedge-shaped brake member between a brake rail disposed on the ground and a wedge guide supported by a metal receiving member fixed to a vehicle body,
A pair of taper members that are in contact with each other at an inclined surface are interposed between the metal receiving member and the wedge guide, and after braking, at least one of the taper members is moved to increase the distance between the wedge guide and the brake rail, thereby the wedge-shaped brake member. A wedge-type vehicle braking device comprising brake member fitting release means for releasing the fitting state of the vehicle. The wedge type vehicle braking device according to claim 1, wherein the brake member fitting release means is a screw type taper member moving means for moving the taper member by a screw. The brake member fitting release means is attached to the taper member on the metal receiving member side, and the taper member on the metal receiving member side is moved along the surface of the metal receiving member by the brake member fitting release means. Item 3. A wedge-type vehicle braking device according to item 1 or 2. 2. The wedge type vehicle braking device according to claim 1, wherein the brake member fitting release means also serves as an initial position adjusting means of the wedge guide. 2. The wedge-type vehicle brake according to claim 1, wherein a plurality of sets of the pair of taper members are provided, and individual brake member fitting release means provided on each taper member are connected so as to be simultaneously operable. apparatus. 2. The wedge type vehicle braking device according to claim 1, wherein a spring member is interposed between the taper member and the wedge guide. The wedge-type vehicle brake according to claim 1, wherein a wedge-shaped brake member is automatically fitted between the brake rail and the wedge guide when the vehicle speed exceeds a predetermined value. apparatus.

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