JP4611671B2 - Brake operating device for vehicle - Google Patents

Description

  The present invention relates to a brake operation device for operating a brake device provided in a vehicle and braking a wheel.

  2. Description of the Related Art Conventionally, as a vehicle for carrying luggage on the premises such as a market or a factory, for example, as described in Patent Document 1, a device storage chamber is provided at the front of the vehicle body, and a front wheel is provided below the device storage chamber. There is a transport vehicle provided with a cargo bed and a rear wheel below it. In this transport vehicle, a cab is provided between the equipment storage room and the loading platform, and a brake pedal and a side brake device for braking the transport vehicle are provided in the cab.

  Now, in general, vehicles are provided with a brake device that brakes the wheels. However, in a friction brake device, the brake shoe wears with use, so that operating tools (pedals, levers, etc.) for operating the brake device are similarly used. Even if it is operated, the phenomenon that the operation of the brake device changes occurs. Therefore, the brake device and the operation tool are adjusted as the wear progresses. Japanese Patent Application Laid-Open No. H10-228667 describes a technique that enables an operation rod of a side brake device to be adjusted up and down.

No. 4-39088

  According to the technique described in Patent Document 1, the operation rod can be expanded and contracted according to the screw pitch by turning the handle rod relative to the female screw tube, and adjustment can be performed relatively easily. However, when the screw structure is employed in this way, it is conceivable that the handle rod may turn carelessly, which may change the state of the folding angle adjustment. In particular, in the case where the side brake is operated by turning the handle rod as described in Patent Document 1, it is conceivable that the side brake is erroneously turned too much.

  Therefore, an object of the present invention is to make it possible to easily adjust an operating tool for operating a brake device and to reliably maintain the adjusted state.

In order to achieve the above object, the present invention relates to a brake operating device for a vehicle, which is connected to a brake device for braking a wheel provided on a vehicle body via a connecting member, and operates the brake in accordance with a driver's operation. A pedal that is swingably supported by the vehicle body, an arm that is swingably supported integrally with the pedal, and that is connected to the brake device via a connecting member, and a stand installed on the vehicle body. A cylindrical cylinder provided with a locking groove that is open at the top and bottom and that opens upward at the top, and is guided by the cylinder so as to be slidable up and down. A lever to be engaged, and a locking piece that protrudes outward from the upper portion of the lever and is inserted into the locking groove to be engaged. The lever is provided with the locking piece. The upper lever and the pedal The lower part of the lever is formed as a separate body and is connected by screwing the helical shaft provided on one side into the helical hole provided on the other side, and the locking piece is inserted into the locking groove And a position where the locking piece is moved upward from the position, and the position where the locking piece is extracted from the locking groove is slidable up and down, and the pedal is moved by moving upward. , Provided so as to swing in the direction in which the brake device is operated, and further, the lever on the lever in a state where the lever is moved to a position where the locking piece is extracted from the locking groove. A stopper that restricts relative rotation with respect to the lower part of the lever to a degree that allows the locking piece to be detached from the upper end of the cylinder and that cannot be freely rotated is provided. the rotation of the cylinder It is movable with restriction position for restricting so that it can not rotate, and a non-restricting position to allow free rotation of the lever upper free while allowing the extent possible hanging off the locking piece on the end It is configured.

  According to such a configuration, when the stopper is moved to be positioned at the non-restricted position, the restriction on the rotation of the upper part of the lever is released and can be freely rotated. The lever can be adjusted according to the pitch of the spiral shaft and the spiral hole by rotating. Also, if the stopper is moved to the restricted position, the stopper can restrict the relative rotation of the upper part of the lever with respect to the lower part of the lever. It is possible to reliably maintain the released state.

  In the above configuration, the stopper is brought into contact with the locking piece to restrict the rotation of the upper portion of the lever, and the portion in contact with the locking piece is configured to lock the lever with the locking piece. In a state where the locking piece is moved upward to a position where it is extracted from the groove, the restriction position of the locking piece located on the rotation track around the axis center of the lever upper portion and the non-restriction retracted from the rotation track It can be provided to be movable to a position. If it does in this way, rotation of a lever upper part can be controlled using a stop piece, and a stopper can be simplified.

  According to the present invention, by positioning the stopper at the restricting position, the stopper can restrict the relative rotation of the upper part of the lever with respect to the lower part of the lever, thereby eliminating the possibility that the upper part of the lever will rotate carelessly. Can do. Further, by positioning the stopper at the non-regulating position, the upper part of the lever can be freely rotated, and the lever can be easily adjusted.

  As shown in FIG. 1 and FIG. 2, the transport vehicle according to this embodiment is provided with a loading platform 2 on which a load is placed at the rear part of a vehicle body 1, and a driving platform 3 on which a driver gets on the front position. And a device storage chamber 4 is provided at a front position thereof. A pair of left and right rear wheels 5 is provided at the rear end of the vehicle body 1 below the loading platform 2, and a front wheel 6 is provided at the front of the vehicle body 1 below the equipment storage chamber 4. Further, a battery 7 is mounted on the vehicle body 1 in front of both rear wheels 5, and a backrest 8 is erected so as to partition the cargo bed 2 and the cab 3 forward and backward.

  The device storage chamber 4 is partitioned by a side cover 41 that covers internal devices from the side and a top cover 42 that covers the device from above, and the front wheel 6 receives power supplied from the battery 7 in the device storage chamber 4. A motor for driving the motor and a controller for controlling the motor are housed. Above the top cover 42, a steering handle 9 and an accelerator ring 10 are provided, and a driver who rides on the cab 3 operates these vehicles by operating them.

  As shown in FIGS. 1 and 2, a brake operation device 20 is provided so that a driver who has boarded the cab 3 can operate the brake operation device 20. The brake device (not shown) provided is interlocked with the rod 11. As shown in FIG. 3, the brake operation device 20 includes left and right supports 21 fixed to the vehicle body 1, a shaft 22 rotatably supported by both supports 21, and arms provided at both left and right ends of the shaft 22. 23, a pedal 24 connected to the shaft 22, and a spring 25 installed on the shaft 22 and the vehicle body 1. The brake operating device 20 includes a cylinder 26 that is fixed to the vehicle body 1 and a lever 27 that is guided by the cylinder 26.

  The vehicle body 1 includes a pair of side frames 1S that are spaced apart in the left-right direction and are provided in the front-rear direction, and a side plate 1A that is joined to the outer surface of each side frame 1S, and includes a support 21. Are fixed to each side plate 1A with bolts. A shaft 22 is supported by the support 21 with the axial direction oriented in the left-right direction, and arms 23 are provided on both left and right ends of the shaft 22 outside the side plate 1A. And the front-end part of the rod 11 is connected with the front-end | tip part of the arm 23, and the rear-end part of the rod 11 is connected with the brake device.

  As shown in FIG. 1, the pedal 24 is provided so as to protrude upward from the cab 3 so that the driver can step on the front portion thereof, and the central portion thereof is fixed to the shaft 22 with bolts. . The rear portion of the pedal 24 is formed in a bifurcated shape, and the lower portion of the lever 27 is engaged with the bifurcated portion. Further, as shown in FIG. 3, a spring 25 formed in a coil shape is installed between the shaft 22 and the vehicle body 1 so as to be extendable in the front-rear direction. When the driver depresses the front portion of the pedal 24, the front portion of the pedal 24 swings downward around the axis of the shaft 22, the spring 25 extends, the shaft 22 and the arm 23 rotate forward, and the rod 11 rotates. Pulled forward, the brake device brakes the rear wheel 5. When the depression of the pedal 24 is stopped, the spring 25 is shortened by the restoring force of the spring 25, the shaft 22 and the arm 23 are rotated rearward, the rod 11 is pushed rearward, and the braking by the brake device is released. Accordingly, the front portion of the pedal 24 swings upward around the axis of the shaft 22 and is returned to its original position. The braking devices provided on the left and right rear wheels 5, respectively, increase the braking force as the front part of the pedal 24 is depressed further downward, that is, as the rear part of the pedal 24 swings further upward. is there.

  As shown in FIG. 3, the vehicle body 1 is provided with a base 1B adjacent to the right side frame 1S, and a cylinder 26 formed in a cylindrical shape opened up and down is provided on the base 1B. It is erected at a position slightly ahead of 8. As shown in FIG. 4, a bracket 26A to which a stopper 31 described later is attached is formed on the upper left side of the cylinder 26, and a groove 26B into which a pin 28 described later is inserted is formed on the upper right side. The groove 26B is formed to open upward, and the groove 26B and the pin 28 are engaged by inserting the pin 28 into the groove 26B from above, and the pin 26 is engaged by being extracted upward. Is to be canceled.

  The lever 27 includes a cylindrical grip 27G whose axial direction is horizontal, a cylindrical upper shaft 27U extending downward from the grip 27G, and a cylindrical lower shaft 27L coupled to the upper shaft 27U. The upper shaft 27U and the lower shaft 27L are inserted into the cylinder 26, and are guided so as to be slidable in the axial direction, that is, in the vertical direction. The upper part of the lower shaft 27L is formed as a spiral shaft, and the lower part of the upper shaft 27U is formed with a spiral hole downward, and the spiral shaft of the lower shaft 27L is screwed into the spiral hole of the upper shaft 27U. Are concatenated. The spiral shaft of the lower shaft 27L and the spiral hole of the upper shaft 27U are screwed together in the cylinder 26.

  As shown in FIGS. 3 and 5, a pin 28 protrudes outward at a substantially vertical center of the upper shaft 27 </ b> U. The pin 28 is formed in a cylindrical shape that is somewhat narrower than the width of the groove 26 </ b> B so that it can be inserted into the groove 26 </ b> B of the cylinder 26, and its tip protrudes somewhat from the outer edge of the cylinder 26. The pin 28 is provided with the grip 27G and the axial center direction parallel to each other, and the pin 28 is inserted into the groove 26B in a state where the axial center direction of the grip 27G is directed in the left-right direction (the state shown in FIG. 2). The Then, the lever 27 is pulled up by holding the grip 27G, the pin 28 is pulled out from the groove 26B, and further rotated from that state, and the pin 28 is hooked on the upper end of the cylinder 26 as shown in FIG. Maintained.

  As shown in FIG. 5, a plate 29 is provided at the lower portion of the lower shaft 27 </ b> L at a position sandwiched between the bifurcated portions of the pedal 24, and a pin 30 is provided outwardly so as to be located below the bifurcated portion. The lower portion of the lower shaft 27 </ b> L is engaged with the pedal 24 via the plate 29 and the pin 30. That is, when the upper shaft 27U is rotated about the axis, the connected lower shaft 27L also attempts to rotate integrally, but the lower rotation of the lower shaft 27L is caused by the plate 29 coming into contact with the bifurcated portion. This prevents the upper shaft 27U from rotating relative to the lower shaft 27L. When the lever 27 is pulled up, the rear portion (bifurcated portion) of the pedal 24 is pushed up by the pin 30 and swings upward, and the front portion of the pedal 24 swings downward. With the pin 30 supporting the bifurcated portion in this way, the pin 28 is hooked on the upper end of the cylinder 26, so that the front portion of the pedal 24 is maintained in the same state as being depressed. When the driver depresses the front part of the pedal 24, the rear part (bifurcated part) of the pedal 24 swings upward, but the pin 30 is positioned below this, so the lower shaft 27L is pushed up. The position of the lever 27 is maintained.

  As shown in FIG. 3, a stopper 31 is attached to the bracket 26 </ b> A of the cylinder 26. A bolt 32 is passed through the stopper 31, and as shown in FIG. 4, a washer 33 is sandwiched between the stopper 31 and the bolt 32, and a washer 34 is sandwiched between the stopper 31 and the bracket 26A. The bolt 32 is passed through the bracket 26 </ b> A, and a nut 35 is screwed onto the bolt 32.

  As shown in FIG. 4, the stopper 31 includes a restriction member 31 </ b> A and a support member 31 </ b> B, and a bolt 32 is passed through a long hole formed in the support member 31 </ b> B and attached to the bracket 26 </ b> A. Here, the bolt 32 and the nut 35 are tightened with an appropriate torque, and the stopper 31 can swing around the axis of the bolt 32 and can move in parallel along the elongated hole. Note that if the torque for tightening the bolt 32 and the nut 35 is too small, the stopper 31 easily moves due to vibration of the vehicle body 1 during traveling. 30N) is added to move. The stopper 31 is swung and translated as described above, and as shown in FIG. 5, the restricting member 31 </ b> A is positioned just above the upper end of the cylinder 26 and closer to the upper shaft 27 </ b> U than the outer edge of the cylinder 26, That is, when the upper shaft 27U is rotated in a state where the pin 28 is extracted from the groove 26B, the pin 28 can be positioned on the rotation track. When the restricting member 31A is positioned at this position (hereinafter referred to as a restricting position), even if the pin 28 is about to rotate, the restricting member 31A comes into contact with the restricting member 31A to prevent the rotation.

  When adjusting the lever 27, as shown by a solid line in FIG. 6, the position where the restricting member 31A is separated from the upper shaft 27U and the upper end of the cylinder 26 and retracted from the rotation track of the pin 28 (hereinafter referred to as non-restricted position). The stopper 31 is swung and translated in advance so that the restriction member 31A is positioned at the non-restriction position. Then, the lever 27 is pulled up so that the pin 28 is positioned above the upper end of the cylinder 26. Accordingly, the upper shaft 27U can be freely rotated, and the lever 27 can be adjusted. For example, by rotating the upper shaft 27U once in a direction in which the spiral shaft of the lower shaft 27L is screwed into the spiral hole of the upper shaft 27U, the spiral hole and the spiral shaft 1 are moved in the direction in which the lower shaft 27L approaches the upper shaft 27U. It moves by the pitch, the lever 27 is shortened as a whole, and the position of the pin 30 is raised. Conversely, by rotating the upper shaft 27U once in the direction in which the spiral shaft of the lower shaft 27L is screwed out from the spiral hole of the upper shaft 27U, the spiral shaft and the spiral shaft 1 are moved in the direction away from the upper shaft 27U. It moves by the pitch, the lever 27 is extended as a whole, and the position of the pin 30 is lowered.

  On the other hand, when operating the lever 27, the stopper 31 is moved so that the restricting member 31A moves from the non-restricted position to the restricted position, and the restriction member 31A is previously restricted as shown in FIG. 5 (indicated by a two-dot chain line in FIG. 6). The member 31A is positioned at the restriction position. Then, the lever 27 is pulled up and the pin 28 is hooked on the upper end of the cylinder 26. Thereby, even if the upper shaft 27U tries to rotate, the rotation is prevented by the pin 28 coming into contact with the stopper 31, so that the relative rotation of the upper shaft 27U with respect to the lower shaft 27L can be restricted. That is, the lever 27 once adjusted as described above can be prevented from being shortened or extended as a whole. Such operation and adjustment of the lever 27 are performed in a state where the pedal 24 is depressed in order to reduce the force required to lift the lever 27.

  In the above description, the stopper 31 is formed by joining the restriction member 31A and the support member 31B formed separately, but the embodiment of the present invention is not limited to this. That is, for example, as shown in FIG. 7, the stopper 31 may be formed as an integral claw shape including a restriction portion 31 a with which the pin 28 abuts and a support portion 31 b supported by the bracket 26 </ b> A via the bolt 32. .

It is a side view of the transport vehicle which concerns on embodiment of this invention. It is a top view of the transport vehicle which concerns on embodiment of this invention. It is a perspective view of the embodiment of the present invention. It is a disassembled perspective view of embodiment of this invention. It is a top view of the embodiment of the present invention. It is a perspective view of the embodiment of the present invention. It is a disassembled perspective view of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 1A Side plate 1B Base 2 Car bed 3 Driver's cab 5 Rear wheel 11 Rod 20 Brake operation device 21 Support 22 Shaft 23 Arm 24 Pedal 26 Cylinder 26A Bracket 26B Groove 27 Lever 27G Grip 27L Lower shaft 27U Upper shaft 28 Pin 31 Stopper

Claims (2)

In a vehicle brake operation device that is connected via a connecting member to a brake device that applies braking to a wheel provided on the vehicle body, and that operates the brake according to the operation of the driver,
A pedal that is swingably supported by the vehicle body; an arm that is swingably supported integrally with the pedal; and is connected to the brake device via a connecting member; A cylindrical cylinder that is formed to open up and down and that has a locking groove that opens upward at the top, and is guided by the cylinder so as to be slidable up and down, with the bottom engaged with the pedal. And a locking piece that protrudes outward at the top of the lever and is inserted into the locking groove to be engaged.
In the lever, a lever upper part provided with the locking piece and a lever lower part engaged with the pedal are formed separately, and a spiral shaft provided on one side is formed in a spiral hole provided on the other side. Between the position where the locking piece is inserted into the locking groove and the position where the locking piece is moved upward from the position and pulled out from the locking groove. And can be slid up and down and moved upward to swing the pedal in a direction to operate the brake device,
Further, the relative rotation of the upper part of the lever with respect to the lower part of the lever in a state in which the lever is moved to a position where the locking piece is extracted from the locking groove is moved to the upper end of the cylinder. A stopper is provided to allow the piece to be detachable and to prevent the piece from rotating freely. The stopper can turn the lever on the upper end of the cylinder and hang the locking piece on the upper end of the cylinder. A brake operating device for a vehicle, wherein the vehicle brake operating device is provided so as to be movable between a restricting position that restricts the lever so that it cannot freely rotate and a non-restricting position that allows free rotation of the upper portion of the lever. The stopper is in contact with the locking piece to restrict the rotation of the upper part of the lever,
When the lever is moved upward to a position where the locking piece is pulled out from the locking groove, the portion in contact with the locking piece is around the axial center of the upper portion of the lever. 2. The vehicle brake operation device according to claim 1, wherein the vehicle brake operation device is provided so as to be movable between the restriction position positioned on the rotation track and the non-restriction position retracted from the rotation track.

Images