JPH07186913A - Stick type parking brake - Google Patents

Abstract

PURPOSE:To provide a stick type parking brake in which the idle turning of a handle is enabled, and also the moving of the handle in the axial direction at the time of idle turning is prevented. CONSTITUTION:A stick type parking brake is provided with a fixed cylindrical body 32 in which a handle 20 is fixed to the one ene of a stem 10 so as to be turnable and not slidable in the axial direction and also which is fixed to the one end outer circumference of the stem 10, a slip-on cylindrical body 33 which is fitted to the outer circumference of the stem 10 so as to be adjacent to the fixed cylindrical body 32 and turnable and slidable in the axial direction and also which is allowed only the axial sliding to the handle 20 and is not allowed rotation, and a retaining energizing means 34 for energizing the slip-on cylindrical body 33 so as to be abutted on the fixed cylindrical body 32. The abutting surface of the fixed cylindrical body 32 and the slip-on cylindrical body 33 is made an inclined surface by which the turning of the handle 20 with regard to the stem 10 is allowed and the posture of the handle 20 in the free condition is returned and retained to a prescribed position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parking brake of an automobile, more specifically, a two-operation open type stick type park.
Regarding the improvement of the operation mechanism of the king brake.

[0002]

2. Description of the Related Art A walking stick type brake is a brake that is released by two different types of operations in order to prevent the brake from being released inadvertently during parking. That is, a two-operation open type is known.

This parking brake has a stem for pulling the break wire and a fixed guide tube for guiding the linear movement of the stem, and the axis of the stem is formed on a part of the upper surface of the stem. A series of rack teeth are provided along the direction, and the fixed guide tube is formed with a check claw that engages with the rack teeth of the stem. And the non-return claw of the fixed guide tube are engaged with each other to hold the stem in a predetermined pulling position.

Then, the handle of the stem is further pulled by a force larger than the reaction force of the break wire to loosen the engagement between the check claw and the rack tooth, and the handle is rotated to turn the rack tooth of the stem into the check claw. After rotating it on the side line that does not engage, let the stem react to the brake reaction force and insert it forward, loosen the brake wire to open the brake, and the pin provided on the stem and the guide tube. The guide mechanism including the groove and the like causes the stem to rotate and return to the side line where the check claw is present at the final stage of the brake opening.

However, even with such a two-operation type,
For example, if the driver's knee accidentally hits the handle of the stem and the handle rotates, the check claw may be disengaged from the rack tooth, and there is a risk that the brake will be inadvertently released. Remains. Therefore, the applicant proposed in Japanese Patent Application No. 55-54030 a device provided with a safety device that eliminates such a risk.

In this, a flange portion is provided at an end of a stem (operating punch), a handle is fixed to a cylindrical body slidably and rotatably fitted to the stem inside the flange portion, and the cylindrical body is fixed. It is biased by a spring to be pressed against the collar portion, and the joint surface between the cylindrical body and the collar portion is an inclined surface.

According to this structure, even if an external force is applied to the handle, the handle only idles with the rotating body with respect to the stem, and there is no risk that the brake will be inadvertently released. In addition, since the joint surface is an inclined surface, the rotating body moves in the direction of contracting the spring while rotating during the idling, so that when the external force disappears, the rotating body will be regenerated by the biasing force of the spring. Return to the position and angle of, and the handle also returns to the original posture.

[0008]

As described above, the prior art described above prevents the risk that the breaker is inadvertently opened in the two-operation open type walking-type parking brake with a simple structure. Although excellent as a thing, the problem was that the handle moved axially when spinning. That is, if the handle is configured to move in the axial direction, in order to avoid interference with the handle, it is necessary to provide an extra space between the handle and the equipment arranged around the handle. However, there is a problem in that the degree of freedom in arranging the equipment in the above-mentioned is reduced.

The present invention has been made in view of the above-mentioned conventional problems, and provides a walking stick type brake which allows the handle to idle and which does not move in the axial direction when the handle is idle. It is intended to be provided.

[0010]

SUMMARY OF THE INVENTION To achieve the above object, the gist of the present invention is: (1) a stem (10) which can be held in a state where a breakable cable is pulled, and this stem (10). And a handle (20) provided at one end on the pulling side of the stem, and when the held stem (10) is twisted, the held state in the pulled state is released,
In a walking-type parking brake capable of loosening a breakable cable by inserting a stem (10), the handle (20) is rotatable with respect to one end of the stem and is not slidable in an axial direction. A holding mechanism (30) is provided for returning or holding the handle (20) to a predetermined posture with respect to the stem (10) in the mounted and free state.
The holding mechanism (30) is fixed to the outer circumference of one end of the stem (10), and is fixed to the outer circumference of the stem (10) adjacent to the fixed cylinder (32). An idle tubular body (33) which is fitted axially slidably and is not rotatable by allowing only axial sliding with respect to the handle (20), and the idle tubular body (33). The fixed cylinder (3) is constituted by a holding biasing means (34) for biasing the fixed cylinder (32) to come into contact with the fixed cylinder (32).
2) and the contact surface between the floating cylinder (33) and the handle (2
0) the handle (20) is allowed to rotate with respect to the stem (10) and is an inclined surface (37, 38) for returning and holding the posture of the handle (20) to the predetermined posture. -King brake.

2 A lock mechanism (50) for making the handle (20) non-rotatable with respect to the stem (10), swingably attached to the handle (20), and one end of which is the stem (10). ) And a locking link (52) that is engageable with one end of the locking link (5).
Lock release urging means (53) for urging 2) in the direction away from the engagement position with respect to the one end of the stem (10).
And a push button (54) which is provided on the surface of the handle (20) and pushes the locking link (52) to swing to the engagement position with respect to the one end of the stem (10) by being pushed. The walking-type parking brake according to item 1 is characterized in that a locking mechanism (50) is provided.

[0012]

According to the walking-type parking brake of the present invention, even if the driver's knee or the like touches the steering wheel and external force is applied to the steering wheel during the operation of the braking operation, the steering wheel and the floating cylinder body (33) are attached. Idling against the stem (10),
The break is not released. At this time, since the handle is attached to the stem (10) so as not to slide in the axial direction, the handle does not move in the axial direction of the stem (10).

At this time, the floating cylinder (33) rotates relative to the fixed cylinder (32), and the abutting surfaces thereof are inclined surfaces (37, 38), so Body (3
3) is pushed by the fixed tubular body (32) and slides in a direction away from the fixed tubular body (32) (sliding also to the handle). Therefore, when the external force applied to the handle disappears,
By the urging force applied to the idle cylinder (33), the handle and the idle cylinder (33) return to their original postures even when they rotate in the opposite directions.

Further, when a lock mechanism (50) for preventing the handle from rotating with respect to the stem (10) is provided, when the handle is pulled and twisted in order to release the brake, it is pushed. When the lock link (52) is swung to the engagement position by pushing the button, the twisting operation force is not only the frictional force between the floating cylinder (33) and the fixed cylinder (32) but also the lock. It is reliably transmitted to the stem (10) through the engagement between the working link and the stem (10).

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, the walking stick type brake of this embodiment is rotatable with respect to a stem 10 for pulling a breakable cable (not shown) and one end of the stem 10. A handle 20 attached so as not to slide in the axial direction, a holding mechanism 30 for returning or holding the handle 20 to a predetermined posture with respect to the stem 10 in a free state, and a lock mechanism for making the handle 20 non-rotatable with respect to the stem 10. And 50.

The stem 10 is supported by a guide tube (not shown) so as to be linearly movable, and predetermined by the engagement of a rack tooth (not shown) provided on a part of the surface thereof with a check claw of the guide tube. Is held in the pull position. In FIGS. 1 and 2, only one end side of the stem 10 is shown, and the part where the rack teeth are formed and the other end side which is connected to the break wire are the same as the well-known structure, and are omitted. . The stem 10 is formed in a substantially round bar shape as a whole, but has a circumferential annular groove 11 into which the tip of the handle 20 is fitted at one end.

As shown in FIG. 2, the handle 20 is formed by fixing an upper case 21 and a lower case 22 with screw members 23, 23, and a cylindrical portion 20a into which the stem 10 is inserted.
An annular overhanging portion 24 is formed on the inner surface of the tip of the stem so as to be rotatably fitted in the groove 11 of the stem 10. By fitting the annular overhanging portion 24 in the annular groove 11, It is freely rotatable and cannot slide in the axial direction. On both the upper and lower sides of the inner surface of the tubular portion 20a of the handle 20,
Vertical grooves 25, 25 into which the strip-shaped projections 36, 36 of a floating cylinder 33, which will be described later, are slidably fitted are formed along the longitudinal direction of the stem 10. Further, as shown in FIG. 2, an opening 26 into which an operation button 54 described later is inserted is formed on the lower front surface of the handle portion 20b of the handle 20, and an inner side surface of the handle portion 20b is provided with a locking link 52 described later. A boss 27 into which the support pin 51 is fitted is formed.

The holding mechanism 30 includes the tubular portion 2 of the handle 20.
0a, a fixed cylindrical body 32 fixed to one end of the stem 10 by a driving pin 31, and a fixed cylindrical body 32 adjacent to the fixed cylindrical body 32, which is rotatably and axially slidably fitted to the outer periphery of the stem 10. A floating cylinder 33 that is allowed to slide only in the axial direction with respect to the handle 20 and cannot rotate, and a floating cylinder 33 that is arranged between the floating cylinder 33 and the annular overhanging portion 24 of the handle 20. Is constituted by a coil spring 34 (holding urging means) for urging the spring to contact the fixed cylindrical body 32.

A lateral groove 35 is formed on the end surface of the fixed cylindrical body 32 on the one end side so that a locking link 52 described later can be engaged with the lateral groove 35. Further, axial band-shaped projections 36, 36 slidably fitted in the above-mentioned vertical grooves 25, 25 of the handle 20 are formed on both upper and lower sides of the outer peripheral surface of the floating cylinder 33,
As a result, the floating cylinder 33 cannot rotate with respect to the handle 20.

The contact surfaces of the fixed cylindrical body 32 and the floating cylindrical body 33 allow the rotation of the handle 20 with respect to the stem 10 and set the posture of the handle 20 in a free state (a state in which no external force is applied) to a predetermined posture. The inclined surfaces 37 and 38 are returned and held. That is, in this case, the inclined surface 37 of the fixed cylindrical body 32 is inclined so as to be curved in a concave shape, while the inclined surface 38 of the floating cylindrical body 33 is curved so as to be convex so as to correspond to the inclined surface 37. When the handle 20 that rotates integrally with the floating cylinder 33 with respect to the stem 20 is in a predetermined posture (for example, the longitudinal direction of the handle 20 is the vertical direction), both the inclined surfaces 37 and 38 are entirely covered. The phase relationship between the fixed cylindrical body 32 and the floating cylindrical body 33 is set so as to be joined.

If the inclination angle (curvature) of these inclined surfaces 37, 38 is too large, idle rotation of the handle 20 will not occur smoothly in the operation described later, and if it is too small, a force for returning the handle 20 to its original posture. Since it becomes weak, it is preferable to set the optimum angle in consideration of the balance with the biasing force of the coil spring 34.

The lock mechanism 50 is swingably supported by a support pin 51 press-fitted into the boss 27 in the handle portion 20b of the handle 20, and has one end engageable with the lateral groove 35 of the fixed cylinder 32 for locking. Link 52 and spring 53 (lock release urging means) for urging the lock link 52 in a direction away from the engagement position with respect to the lateral groove 35.
And the lock link 5 is provided on the front surface of the handle portion 20b of the handle 20 so as to be movable back and forth and pushed.
It is composed of a push button 54 that pushes 2 to swing it to an engaging position with respect to the lateral groove 35.

The spring 53 is wound around the support pin 51. One end of the spring 53 is brought into contact with the inside of the handle 20 and the other end of the spring 53 is locked to the other end of the locking link 52.
2 is biased in the above-mentioned direction. The push button 54 is slidably attached to the opening 26 of the handle 20, and the projection 55 on the back surface abuts the other end of the lock link 52 to press the lock link 52.

As shown by the alternate long and short dash line in FIG. 1, a resinous covering material 60 is attached to the surface of the handle 20 by, for example, so-called cast molding, and the push button 54 has the covering material 60. After being formed, the hook-shaped portions 56, 56 at both ends of the back surface are locked to the inner edge of the opening 26 by being inserted into the opening 26 and opened while being compressed in the width direction so as not to come off. It is attached. The lateral groove 35 of the fixed tubular body 32 is formed at a position where the locking link 52 is engaged with the handle 20 in the predetermined posture.

Next, the operation will be described. Above stick type
According to the king brake, even if a driver's knee or the like touches the steering wheel 20 and an external force is applied to the steering wheel 20 during the operation of the braking operation, the steering wheel 20 idles with respect to the stem 10 together with the floating cylinder 33, and the steering wheel is blocked. -Reck is not released. At this time, since the handle 20 is attached to the stem 10 so as not to slide in the axial direction,
Does not move in the axial direction.

At this time, the floating cylinder 33 is fixed to the fixed cylinder 32.
Since they rotate relative to each other and their contact surfaces are the inclined surfaces 37 and 38 described above, the floating cylinder 33 is pushed by the fixed cylinder 32 by the inclined surface 37 to compress the coil spring 34. At the same time, it slides in a direction away from the fixed tubular body 32 (also slides with respect to the handle 20). Therefore, when the external force applied to the handle 20 disappears, the urging force of the coil spring 34 applied to the floating tube body 33 causes the handle 20 and the floating tube body 33 to return to their original postures even if they rotate in the opposite directions.

When the handle 20 is pulled to release the brake and the stem 10 is twisted, the push button 54 is pushed with the finger of the hand holding the handle 20 to bring the lock link 52 into the engaging position. When it is rocked, the twisting operation force is not only generated through the frictional force between the floating cylinder 33 and the fixed cylinder 32 but also through the engagement between the locking link 52 and the fixed cylinder 32 (stem 10). And reliably transmitted to the stem 10.

Therefore, in this embodiment, even if an external force is applied to the handle 20 during the operation of the brake, the brake is not released accidentally, and at this time, the handle 20 moves in the axial direction of the stem 10. The effect is that it does not move. Further, the operation of releasing the break works extremely reliably.
Furthermore, since most of the parts are stored in the handle, there is an effect that the appearance is neat and the appearance of the product is improved.

The present invention is not limited to the above embodiment, but may have various modes. For example, the arrangement of the fixed cylinder and the floating cylinder in the axial direction may be reversed.

[0030]

With the operation mechanism of the walking stick type brake according to the present invention, even if an external force is applied to the handle during the operation of the brake, the brake is not released carelessly. The effect is that the handle does not move in the axial direction of the stem. Further, in the case where the lock mechanism is provided, the operation of releasing the brake works extremely reliably.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an embodiment of the present invention.

FIG. 3 is a side view showing an embodiment of the present invention.

FIG. 4 is a bottom view showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Stem 20 ... Handle 30 ... Holding mechanism 32 ... Fixed cylinder 33 ... Floating cylinder 34 ... Holding biasing means 50 ... Lock mechanism 52 ... Locking link 53 ... Lock release biasing means 54 ... Push button

Claims (2)

[Claims] 1. A stem that can be held in a state where a breakable cable is pulled, and a handle provided at one end on the pulling side of the stem. When the held stem is twisted, the pulled state is obtained. In a walking-type parking brake in which the holding is released and the brake cable can be loosened by inserting the stem, the handle is rotatable with respect to one end of the stem and is not slidable in the axial direction. A holding mechanism that returns or holds the handle to a predetermined posture with respect to the stem in an attached and free state is provided, and the holding mechanism includes a fixed cylinder fixed to an outer periphery of one end of the stem, and a fixed cylinder adjacent to the fixed cylinder. And a floating cylinder which is rotatably and axially slidably fitted to the outer circumference of the stem, and is not rotatable by allowing only axial sliding with respect to the handle, and the floating cylinder. And a holding urging means for urging the fixed cylinder to come into contact with the fixed cylinder. The contact surfaces of the fixed cylinder and the floating cylinder allow rotation of the handle with respect to the stem and are in a free state. A walking-type parking brake, characterized in that the handle is an inclined surface that returns the posture to the predetermined posture and holds it. 2. A lock mechanism for locking the handle with respect to the stem, the lock link being swingably attached to the handle and having one end engageable with one end of the stem. A lock release urging means for urging the locking link in a direction away from the engagement position with respect to the one end of the stem, and the locking link being pushed by being pushed on the surface of the handle to push the stem. 2. The walking stick type parking brake according to claim 1, further comprising a lock mechanism including a push button which is swung to an engagement position with respect to one end of the stick type parking brake.