JPS62122855A - Manual brake device - Google Patents

Abstract

PURPOSE:To enable proper setting of a repulsion member through accurate reflection of a brake force and to reduce the size of a device and improve durability, by a method wherein a brake force is detected by means of the return force, serving as a medium, of a control handle during braking, and the return force is reduced to transmit it to the repulsion member for detection. CONSTITUTION:A swing member 30, latchet claw 40 and a guide member 31, serving as a preventing member, and a guide member 31 are mounted to the tip part of a base bracket 20, and a motion lever 50 is pivotally attached to a base part 21 through a pivot 51. Further, a control handle 60 is inserted through a guide part 31, and its tip is coupled to a free end 52 of the motion lever 50 for support so as to allow brake motion. A cable A, serving as a transmission member to a brake portion, is coupled to a base part 21 of the motion lever 50, and a detecting switch 23 is mounted. This constitution causes a repulsion member 36 to receive the return force of the control handle 60 during braking, and causes detection of a brake force through displacement of a swing member 36 against the repulsive force thereof. As a result, a brake force is accurately reflected, and a brake force can be detected through structure having sufficient durability.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention includes an operating handle that is supported for braking operation, and a restraining member that prevents the operating handle from returning during braking, and is capable of detecting braking force. This manual brake device is used in, for example, automobiles and industrial vehicles.

"Prior Art" Conventional 1 For example, in a manual brake system commonly used in automobiles, a position detection switch is activated when the operating knob moves to a predetermined position, and the degree of braking is detected by the operating stroke of the operating handle. In addition, as disclosed in Japanese Utility Model Application No. 60-78656, a coil spring is interposed between the operating handle (operating rod in this publication) and the sleeve that transmits the load. A system has been proposed in which the braking state is detected by the deflection of this coil spring.

``Problems to be Solved by the Invention'' However, in such conventional manual brake devices, the braking condition is detected by the operating stroke of the operating handle, but the operating stroke may fluctuate due to looseness in the transmission system, etc. Even in such cases, it is necessary to detect and judge whether the braking force is appropriate at the same position.
There is a problem in that the braking state cannot be reflected correctly and a braking failure state may not be detected.

In addition, in the latter case, the braking force is detected by the displacement that resists the elastic force of the coil spring, so the above-mentioned problem does not occur, but the coil spring is directly subjected to the operating force. Because of this, a coil spring with increased elasticity is required, which not only increases weight and cost, but also reduces reliability against fatigue if the coil spring is designed to be housed in a limited space. There was a problem that the resistance was lowered and the durability was lowered.

The present invention has been made in view of these conventional problems, and aims to provide a manual brake device that accurately reflects the braking force, has a sufficiently durable structure, and is capable of detecting the braking force. The purpose is

The gist of the present invention to achieve this object is to provide an operating handle that is supported for braking operation, and a restraining member that prevents the operating handle from returning during braking. In the manual brake device capable of detecting braking force, a swinging member for detecting braking force is pivotally connected to a support member, the restraining member is attached to the tip of the swinging member, and a base of the swinging member is mounted. The end portion extends along the support member, and an elastic member having a biasing force in a direction to receive the braking force is interposed between the proximal end portion of the swinging member and the support member, and the elastic member is interposed between the base end portion of the swinging member and the support member. A switch for detecting displacement due to rocking is provided between the base end of the rocking member, the resilient member receives the return force of the operating handle during braking, and the rocking member resists the resilient force. According to the manual brake device, the braking force is detected by the switch based on the displacement of the brake.

"Operation" When the operating handle is stopped by the restraining member during braking, the braking force is transmitted to the tip of the swinging member, and the swinging member resists the urging force of the urging member due to the braking force. The device swings, and the displacement of the base end of the rocking member due to this rocking is detected by a switch, and the braking force is determined by the lever ratio of the tip end and base end with respect to the rocking center of the rocking member. It is designed to reduce and transmit the force, so that even a resilient member with a small biasing force can be used.

"Example" An embodiment of the present invention will be described below based on one drawing.

1 and 2 show one embodiment of the invention.

In the brake device 10, a swinging member 30, a ratchet pawl 40 serving as a restraining member, and a guide member 31 are attached to the tip of a base bracket 20.
An operating lever 50 is pivotally attached to the operating lever 50 via a pivot shaft 51, and an operating handle 60 is inserted through the guide member 31 and its tip is connected to the free end 52 of the operating lever 50, so that it is supported for braking operation. , a cable A serving as a transmission member to the braking area is connected to the base of the operating lever 50! In this embodiment, the base bracket 20 serves as a support member,
The base bracket 20 has a base portion 21 and a mounting bracket 22 fixed to a mounting portion of a vehicle body or the like. A return detection switch 23 is mounted on the base 21 facing the base of the operating lever 50.

The swinging member 30 is connected to the pace bracket (20) via the pivot shaft 25.
A guide member 31 is pivotally attached to the tip of the swinging member 30 via a pivot pin 32, and a ratchet pawl 40 is pivotally attached to the tip of the swinging member 30.

The main part of the guide member 31 is a guide cylinder part 33.

The rod portion 61 of the operating handle 60 is slidably inserted into the guide tube portion 33 of the guide member 31, and the side of the guide tube portion 33 facing the ratchet pawl 40 is open.

The base end 34 of the swinging member 30 extends along the bottom surface 26 of the distal end 24 of the base bracket 20, and is located at a position corresponding to the seat 35 provided at an intermediate position of the base end 34 and the pace bracket 20. A resilient member 36, which is a coil spring, is stretched between the mounting brackets 22 fixedly attached to the mounting bracket 22, and the head of the resilient member 36 is held down by an adjustment screw 27 provided on the mounting bracket 22.

Due to the biasing force of the resilient member 36, the base end 34 is pressed against the bottom surface 26 of the distal end 24 of the pace bra 20 in the non-braking state.
floating from

A pushing piece 37 is fixed to the end of the base end 34 of the swinging member 30, and a switch 11 facing the pushing piece 37 detects displacement.
is supported on the mounting part. When the brake is not applied, the switch 11 is off.

The ratchet claw 40 has a claw tip 41 facing the rod portion 61 of the operating handle 60 through the opening of the guide member 31, and a biasing spring 4
At 2, the toe 41 is biased in the direction in which it comes into elastic contact with the rod portion 61.

The operating handle 60 is provided with a handle 62 at the top of a rod portion 61, and locking teeth 63 are carved on the side of the rod portion 61 in a direction that prevents return when the toe 41 is engaged. A connecting bracket 64 is connected to the lower end of the portion 61 via a circumferential groove 65 and a pin 66 implanted in the rod portion 61. A spring 67 is stretched between the bin 66 and the connecting bracket 64 to bias the rod portion 61 in one direction. The connecting bracket 64 is connected to the free end 52 of the operating lever 50 via the connecting pin 6B.

Next, the action will be explained.

The solid line in FIG. 1 indicates a non-braking state, and when the handle 62 is pulled up, the rod portion 61 of the operating handle 60 slides within the guide cylinder portion 33 of the guide member 31, and the toe 41 of the ratchet pawl 40 pass over the locking teeth 63 one after another. Even if the handle 62 is released, the toe 41 cannot get over the locking teeth 63 in the return direction, so the return is prevented.

As the operating handle 60 is pulled up, the free end 52 of the operating lever 50 is pulled via the connecting pin 68, causing the operating lever 50 to rotate counterclockwise in FIG. Since the cable A is pulled by the rotation of the operating lever 500, the operating force is transmitted to the braking area.

As the operating lever 50 rotates, the free end 52 follows an arcuate trajectory, and the operating handle 60 is not only pulled up linearly, but also swings somewhat around the pivot pin 32.

When the operating handle 60 is pulled up sufficiently, the reaction force of the cable A becomes large, and you can feel that the braking force has become considerably large. When you release the handle 62 at an appropriate point, the locking teeth 63 will ratchet. The operating handle 60 is locked by the tip 41 of the claw 40 and is prevented from returning.

The return force of the operating handle 60 rotates the swinging member 30 about the pivot shaft 25, and the swinging member 30 rotates by a small angle clockwise in FIG. 1 while compressing the elastic member 36.
．． When the reaction force of the cable A is sufficient and the braking force is sufficient, the pushing piece 37 at the end of the proximal end 34 of the swinging member 30 is displaced considerably, and the switch 11, which had been turned off, is activated. Turn it on. The operation of this switch 11 is displayed on a lamp or meter as necessary to detect the braking state. This display is always detected when braking.

If the reaction force of the cable A is insufficient, the pushing piece 37
It can be seen that the amount of displacement is insufficient and the switch 11 cannot be operated, indicating that the braking force is insufficient. The return force of the operating handle 60 is reduced and transmitted to the resilient member 36 depending on the lever ratio centered on the pivot shaft 25, so by appropriately setting the lever ratio, the resilient member 36 has an appropriate specification.
can be set.

If the braking force is sufficient, the base end 34 of the swinging member 30
comes into contact with the bottom surface 25 of the base bracket 20, and the elastic force of the elastic member 36 no longer affects the braking force.

To return the operating handle 60, hold the handle 62 and release the spring 6.
The portion above the rod portion 61 is rotated relative to the connecting bracket 64 against the urging force of 7.

Then, the locking tooth 63 is in a position where it does not engage with the toe 41 of the ratchet pawl 40, so if the operating handle 60 is inserted as it is, the operating lever 50 will rotate due to the reaction force of the braking force from the cable A. It returns to the non-braking position accordingly.

When the handle 62 is released after returning to the non-braking position, the upper portion of the rod portion 61 of the operating handle 60 rotates due to the biasing force of the spring 67, and the locking teeth 63 are brought to a position where they engage with the toe 41 of the ratchet pawl 40. and completely returns to the non-braking state.

While the operating handle 60 is returning, the swinging member 30 is rotated counterclockwise by the biasing force of the resilient member 36, and the switch 11 is turned off, indicating that the braking force is insufficient.

When the operating handle 60 returns completely, the operating lever 50 hits the return detection switch 23 and the return detection switch 23
is turned off to detect that the brake is not dragging.

In the above embodiment, a so-called cane type manual brake device is used, and the return force of the operating handle 60 is detected by the swinging member 30 attached to the base bracket 20. A similar structure can also be realized by installing .

More specifically, if it has an operating handle that is supported for braking operation and a restraining member that prevents the operating handle from detenting during braking, the structure of the present invention can be implemented at the detenting part. It can also be applied to lever-type manual brake devices.

Further, in the embodiment described above, the immovable base bracket 20 is used as a support member, but the operating handle 60 may also be used as a support member.

"Effects of the Invention" According to the manual brake device of the present invention, braking force is detected using the return force of the operating handle corresponding to the braking force as a medium, and the return force is reduced and transmitted to the elastic member for detection. By doing so, the elastic member can be appropriately set, and the elastic member can be made smaller and lighter, and sufficient durability can be obtained without being damaged due to fatigue or the like. It also makes it easier to set and adjust the detection load.
It can be made to have good operating characteristics.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a front view of a manual brake device, and FIG. 2 is a plan view of the same.

Claims (1)

[Scope of Claim] A manual brake device that includes an operating handle that is supported to enable braking operation and a restraining member that prevents the operating handle from returning during braking, and that is capable of detecting braking force. A movable member is pivotally attached to a support member, the restraining member is attached to a distal end of the swing member, and a proximal end of the swing member extends along the support member to apply a biasing force in a direction to receive a braking force. interposed between the base end of the rocking member and the support member, and a switch for detecting displacement due to rocking between the support member and the base end of the rocking member. A manual brake device is provided in which the return force of the operating handle during braking is received by the resilient member, and the braking force is detected by the switch based on the displacement of the swinging member against the resilient force.