JPH054457Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a device for operating a parking brake of an automobile.

Problems to be solved by conventional techniques and ideas In conventional parking brakes, a ratchet wheel connected to the end of a parking cable rotates integrally with the operating lever, and when the cable stretches due to use, the operating lever Since the operating angle of the cable changes, it is necessary to adjust the attachment relationship according to the elongation of the cable, but this adjustment work is complicated and takes a long time.

Means for Solving the Problem The operating lever and the ratchet wheel are supported so that they can rotate freely relative to each other on a shaft attached to the bracket, and the end of the parking cable is connected to the ratchet wheel. A latching pawl that is biased to a position where it is latched and prevents the parking cable from rotating in the direction of loosening is pivotally supported so as to be able to swing to a position where it is separated from the ratchet wheel. A release knob which is biased in a direction protruding from the tip of the operating lever and which, when pushed against this bias, swings the latch pawl to a position where it is separated from the ratchet wheel via the rod; a drive pawl that is pivotally supported to swing between a latching position and a separating position;
The grip of the operating lever is biased in a downwardly protruding position, and when pushed against this bias, the grip is pivoted so as to swing into a position in which the drive pawl is engaged with the ratchet wheel via the connecting member. It has a configuration in which an actuating piece is attached.

Functions and Effects of the Invention The present invention has the above-mentioned configuration, and when the operating lever is grasped, the actuating piece is actuated and the drive pawl is engaged with the ratchet wheel, so when the operating lever is rotated, the ratchet wheel rotates as a unit. Then, the parking cable is pulled and the brake is applied, and when you let go of the operating lever in this state, the drive pawl separates from the ratchet wheel and the latch is released. Since it is hooked to the wheel, the ratchet wheel is locked at that angle, and at this time, the operating lever is free with respect to the ratchet wheel, so it can be returned to its original position. Next, to release the brake, push in the release knob on the operating lever, the latch pawl will move away from the ratchet wheel, the ratchet wheel will be unlocked, and the parking cable will be relaxed, and the operating lever will It only engages with the ratchet wheel during the operation to apply the brake, and in any other state where the brake is applied or released,
Since it is not engaged with the ratchet wheel, even if the parking cable is stretched, only the locking angle of the ratchet wheel changes, and the operating angle of the operating lever is always constant. There is no need to make any adjustments, and even when the brake is applied, the control lever can be returned to the position where the brake is released, so the control lever should be kept out of the way when not in operation. This has the effect of improving livability.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings.

A ratchet wheel 4 is attached to the bracket 2 by a shaft 3 extending over a bracket 2 fixed to the vehicle body frame 1.
An operating lever 5 is rotatably supported on the inside of the frame 1 so as to straddle the bracket 2, and a parking cable C whose other end is connected to the brake of the wheel is connected through a window hole 6 formed in the frame 1. It is pulled out inside the bracket 2 and routed along an arcuate guide plate 7 fixed to one side of the ratchet wheel 4.
A metal fitting 8 fixed to the tip is hooked to a hook 9 formed on the ratchet wheel 4, and a tension force is applied to the cable C by the elasticity of a spring (not shown) attached to the brake side. Reference numeral 4 is a locking pawl 11 which is rotated freely in the clockwise direction in FIGS. 1 and 2 by the tensile force, and is rotatably supported by a shaft 10 extending over the upper part of the bracket 2.
However, by the elasticity of the spring piece 13 installed between the bracket 2 and the top surface of the bracket 2, it is latched onto the ratchet wheel 4 to prevent the ratchet wheel 4 from rotating clockwise due to the tensile force of the cable C. A torsion coil spring 14 is installed between the ratchet wheel 4 and the bracket 2, which biases the cable C with a weak force in the counterclockwise direction in order to apply tension to the cable C and prevent the ratchet wheel 4 from floating. ing. The operating lever 5 has a U-shaped cross section, and includes a drive pawl 16 rotatably supported by a shaft 15 extending near the support end, and a shaft 19 rotatably supported on the lower surface of the grip 18 at the free end. The actuating piece 20 is connected by a connecting member 17 such as a rod or wire, and the actuating piece 20 is urged to protrude downward by the elasticity of a torsion coil spring 21 installed between it and the operating lever 5. At this time, the drive pawl 16 is separated from the ratchet wheel 4. Further, a rod 23 inserted through a through hole 26 of a support piece 25 is housed inside the operating lever 5 so as to be freely movable in the length direction, and its tip is fitted into the tip of the grip 18 so as to be freely retractable. connected to the release knob 22,
The rear end is adapted to come into contact with the protrusion 12 formed on the upper surface of the above-mentioned latch claw 11, and this rod 23 is urged toward the tip of the operating lever 5 by the elasticity of the coil spring 24. There is.

Next, the operation of this embodiment will be explained.

As shown in FIG. 1, when the grip 18 is grasped when the brake is released and the operating lever 5 is in a horizontal position, the operating piece 20 swings upward and connects, as shown by the chain line in the figure. The member 17 moves toward the tip of the operating lever 5, and the drive pawl 16 rotates clockwise to engage the ratchet wheel 4. As shown in FIG. 2, when the operating lever 5 is pulled up, the pawl The car 4 rotates counterclockwise, the cable C is pulled, and the brakes are applied. When the operating lever 5 is released, the actuating piece 20 rotates downward due to the elasticity of the torsion coil spring 21, and the driving pawl 16 rotates counterclockwise and is removed from the ratchet wheel 4. Since the latching pawl 11 is latched to the ratchet wheel 4, the ratchet wheel 4 is not rotated clockwise due to the tensile force of the cable C, but is locked at that angle and held in the state where the brake is applied. . On the other hand, the operating lever 5 is operated by the ratchet wheel 4.
Since the engagement with the robot is released and the robot is in a free state, it returns to a horizontal position due to its own weight or by manual operation.

To release the brake, press the release knob 22 at the tip of the operating lever 5, as shown by the chain line in FIG.
When pressed, the latch pawl 11 is pushed counterclockwise via the rod 23, and the latch with the ratchet wheel 4 is released.
The ratchet wheel 4 is rotated clockwise by the tensile force of the cable C, and the cable C is relaxed and the brake is released. Note that this release operation can be performed even when the operating lever 5 is pulled up.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view with the brake released.
FIG. 2 is a sectional view with the brake applied, and FIG. 3 is an exploded perspective view. 2...Bracket, 4...Rawl wheel, 5...Operation lever, 11...Latching pawl, 16...Driving pawl, 18...
... Grip, 20 ... Actuation piece, 22 ... Release knob, C ... Parking cable.

Claims (1)

[Scope of utility model registration request] An operating lever 5 and a ratchet wheel 4 are mutually supported on a shaft 3 attached to a bracket 2 so as to rotate freely, an end of a parking cable C is connected to the ratchet wheel 4, and the ratchet wheel 4 is connected to the bracket 2. A latching pawl 11 is biased to a position where it is latched to the parking cable C and prevented from rotating in the loosening direction of the parking cable C. At the same time, the operating lever 5 is biased in a direction protruding from the tip of the operating lever 5, and by pushing against this bias, the locking pawl 11 is engaged with the ratchet wheel 4 via the rod 23. a release knob 22 that is pivoted to swing between a position in which it is latched to the ratchet wheel 4 and a position in which it is moved away from the drive claw 16; It is urged to protrude downward, and when pushed against this urging, the drive pawl 16 is pivotally supported so as to swing into a position in which it engages the ratchet wheel 4 via the connecting member 17. A parking brake operating device characterized in that an operating piece 20 is attached thereto.