JPH06107140A - Operating mechanism for cane type parking brake - Google Patents

Abstract

PURPOSE:To provide a cane type parking brake operating mechanism through which the idle turning of a handle is possible, and the handle is prevented from axial movement in the case of the idle turning CONSTITUTION:A cane type parking brake operating mechanism has a handle cylindrical body 2 which is rotatably and slidably fitted at one end on the pulling side of a stem 1 to draw a brake cable, and regulated in its movement toward the other end of the stem 1 to a fixed position, and is provided with a pressing cylindrical body 3 which is positioned nearer the one end of the stem 1 than the handle cylindrical body 2 and nonrotatably and slidably fitted on the stem 1, and abuts on the handle cylindrical body 2 to press it toward the other end of the stem 1, and is energized not to slip off toward the one end of the stem 1. A handle 6 is provided so as to be fixed to the handle cylindrical body 2 and rotatable to the stem 1, and an abutted face between the handle cylindrical body 2 and the pressing cylindrical body 3 is formed into an inclined face which allows the rotation of the handle 6 and sets up the posture of the handle 6 in a free state to a fixed posture.

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 greater 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 and guide tube provided on the stem 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 parking brake in which the handle can be idle and the handle does not move in the axial direction when the handle is idle. The purpose is to provide an operating mechanism.

[0010]

The gist of the present invention for attaining the above object is to: (1) A stem that can be held in a state where a breakable cable is pulled, and one end on the pulling side of this stem. With a handle provided, when the held stem is twisted, the held state in the pulled state is released, and the stem can be inserted to loosen the breakable cable. In the operating mechanism, a handle cylinder that is rotatably and slidably fitted to one end of the stem and is restricted from moving to the other end side of the stem to a predetermined position, and the stem rather than the handle cylinder. Is located at one end side of the stem and is non-rotatably and slidably fitted to the stem, abuts against the handle tubular body and pushes it toward the other end side of the stem, and prevents the stem from coming off to the one end side of the stem. Biased presser foot And a handle is fixed to the handle cylinder to be rotatable with respect to the stem, and the contact surfaces of the handle cylinder and the press cylinder allow the handle to rotate. An operating mechanism for a walking-type parking brake, characterized in that the handle in a free state is an inclined surface that has a predetermined posture.

2 When the handle is pulled toward the one end side of the stem against the urging force of the pressing cylinder, the engagement between the handle and the stem is performed so that the rotation is transmitted between the stem and the stem. The sticking type parking brake operating mechanism according to item 1 is characterized in that a coupling means is provided.

[0012]

According to the operation mechanism of the walking stick type brake according to the present invention, even when 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 steering wheel tubular body are attached together. It spins against the stem and the brake is not released. Moreover, at this time, the handle and the handle cylinder are moved by the action of the pressing cylinder and the contact surface.
It does not move in the axial direction of the stem. Further, at this time, since the pressing cylinder cannot rotate together with the handle cylinder, the pressing cylinder is pushed by the handle cylinder at the inclined contact surface,
It moves to one end of the stem according to the rotation angle of the handle. For this reason, when the external force applied to the handle disappears, the urging force applied to the presser tube body pushes the handle tube body against the presser tube body, and the handle tube body and the handle return to their original postures. Return.

Further, when the engaging means for engaging the handle with the stem is provided, when the handle is pulled and twisted in order to release the brake, the operating force thereof is the handle tubular body. Not only the frictional force between the pressing cylinder and the pressing cylinder, but also surely transmitted to the stem via the engaging means.

[0014]

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 operation mechanism of the walking stick type brake of the present embodiment has a break rake.
A stem 1 for pulling a bull (not shown), a handle cylinder 2 rotatably and slidably fitted to one end of the stem 1, and one end side of the stem 1 with respect to the handle cylinder 2 (see FIG. 1), which is located on the right side), is attached to the stem 1 so as to be non-rotatably and slidably fitted to the stem 1.
A handle 6 fixed to the handle tubular body 2 via 5,
Press the holding cylinder 3 to the other end side of the stem 1 (left side in FIG. 1)
A spring 7 for urging the handle 6 and an engaging means 8 for engaging the handle 6 and the stem 1 when the handle 6 is pulled toward one end of the stem 1 against the urging force of the spring 7. Is.

The stem 1 is supported by a guide tube (not shown) so as to be linearly movable, and by engaging rack teeth (not shown) provided on a part of the surface thereof with a check claw of the guide tube,
It is held at a predetermined tension position. In FIGS. 1 and 2, only one end of the stem 1 is shown, and the part where the rack teeth are formed and the other end which is connected to the break wire have the same configuration as that of a known structure, and therefore are omitted. There is.

The entire stem 1 is formed into a substantially round bar shape, but the outer peripheral shape of the portion to which the holding cylinder 3 is fitted is flatly cut on both sides as shown in FIGS. It is shaped like Further, a small diameter portion 1a is formed on the end face on the one end side, and the pin 9 is provided at a position slightly inside the small diameter portion.
Is fitted in the radial direction, and a ring-shaped spring receiving member 10 is fitted inside thereof.

The handle cylinder 2 is cylindrical and is fitted in the round bar-shaped portion of the stem 1 with a slight clearance so as to be rotatable and slidable. In this case, the stem 1 will be described later.
By the contact between the small diameter portion 1a of the and the shaft portion 6b of the handle 6,
The movement of the stem 1 to the other end side is restricted to a predetermined position. Further, the end surface that comes into contact with the presser cylinder 3 has a shape inclined with respect to the axial direction of the stem 1.

The holding cylinder 3 has a cylindrical outer shape only,
The inner diameter is set as shown in FIG.
The both sides of the stem 1 are fitted into the portion with a slight gap, so that only the axial movement of the stem 1 is allowed and rotation is blocked. The end surface of the pressing cylinder 3 that contacts the handle cylinder 2 is an inclined surface that contacts the inclined end surface of the handle cylinder 2.

If the angle of inclination of the inclined surface is too large, the handle 6 will not idle smoothly in the operation described later, and if it is too small, the force for returning the handle 6 to its original posture will be weak, so the spring 7 It is preferable to set the optimum angle in consideration of the balance with the urging force. Further, the phase relationship between the inner diameter of the presser cylinder 3 and the inclination direction of the inclined surface is in the state where the handle cylinder 2 and the presser cylinder 3 are entirely joined (the free state in which no external force is applied to the handle 6). The handle 6 is set to have a predetermined posture (for example, a posture in which the longitudinal direction thereof is the vertical direction).

The pressing cylinder 3 is structured so that the movement to one end side of the stem 1 is restricted to a limited range by the spring 7, the spring receiving member 10 and the pin 9, and the pressing cylinder body 3 is prevented from coming off to the one end side of the stem 1. ing. The connecting cylinder 4 and the connecting cylinder 5 are cylindrically arranged so as to cover the outer periphery of the stem 1, and the connecting cylinder 4 is welded to the handle cylinder 2 and the connecting cylinder 5 is welded to the connecting cylinder 4. Alternatively, it is fixed with screws or the like. As shown in FIG. 3, a notch 11 that engages with a projecting portion of the pin 9 is formed on the end surface of the connecting tubular body 4 on the one end side, and the notch 11 and the pin 9 in the present embodiment are the present invention. The engaging means 8 of FIG. The notch 11 is formed at a position that engages with the pin 9 when the handle 6 is pulled toward one end of the stem in the predetermined posture.

The handle 6 comprises a handle body 6a and a shaft portion 6b, and a concave portion into which the small diameter portion 1a of the stem 1 is fitted is formed on the end surface of the shaft portion 6b. This handle 6
Is inserted into the end portion of the connecting cylinder body 5 with a bush 12 interposed therebetween, and is fixed to the connecting cylinder body 5 by a driving pin 13.

Next, the operation will be described. For example, even if the driver's knee or the like touches the steering wheel 6 and an external force is applied to the steering wheel 6 during the brake operation, the steering wheel 6 idles with respect to the stem 1 together with the steering tube body 2, and the brake is not released.
Moreover, at this time, since the handle 6 and the handle cylinder 2 are pushed toward the other end of the stem 1 by the retainer cylinder 3, the small diameter portion 1a of the stem 1 and the recess of the shaft portion 6b of the handle 6 come into contact with each other. The stem 1 is held in the open position and does not move in the axial direction of the stem 1. Further, at this time, since the holding cylinder 3 cannot rotate together with the handle cylinder 2, the pressing cylinder 3 is pushed by the handle cylinder 2 at the inclined contact surface, and the one end side of the stem 1 depending on the rotation angle of the handle 6. Move to. Therefore, when the external force applied to the handle 6 disappears, the handle cylinder 2 is pressed against the presser cylinder 3 by the urging force of the spring 7 applied to the presser cylinder 3, and the handle cylinder 2 and the handle 6 are separated from each other. It reversely rotates and returns to the predetermined posture.

When the handle 6 is pulled, the handle cylinder 2 and the presser cylinder 3 move toward one end of the stem 1 while compressing the spring 7, and after the pin 9 and the notch 11 are engaged, the stem 1 is removed. Start moving. Therefore, when the handle 6 is pulled and twisted in order to release the brake, the rotational operation force is not only the frictional force between the handle tube body 2 and the pressing tube body 3 but also the engagement. It is reliably transmitted to the stem 1 via the means 8.

Therefore, according to the present embodiment, even if an external force is applied to the handle 6 while the brake is operating, the brake is inadvertently broken.
The handle 6 is not released, and at this time, the handle 6 is the stem 1
The effect is that it does not move in the axial direction. Further, the operation of releasing the break works extremely reliably.

The present invention is not limited to the above embodiment, but may have various modes. For example, the means for restricting the movement of the handle tubular body 2 toward the one end side may be a collar-shaped portion provided on the outer circumference of the stem 1, and the collar-shaped portion may abut the end surface of the handle tubular body 2. .

[0027]

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 engaging means for engaging the handle and the stem is provided, the operation for releasing the brake functions extremely reliably.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention and is a partial cross-sectional view.

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

FIG. 3 is a side view of a connecting cylinder according to an embodiment of the present invention.

FIG. 4 is a view of the holding cylinder according to the embodiment of the present invention as viewed from the axial direction.

FIG. 5 is a view of the stem in one embodiment of the present invention as seen from one end side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Stem 2 ... Handle cylinder 3 ... Holding cylinder 6 ... Handle 8 ... Engaging means

Claims (2)

[Claims] 1. A stem which 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 pulled and twisted, the pulling is performed. In the operation mechanism of a walking-type parking brake in which the holding state is released and the brake cable can be loosened by inserting the stem, the operation mechanism is rotatably and slidably fitted to one end of the stem. ,
A handle tubular body whose movement toward the other end side of the stem is restricted to a predetermined position, and a non-rotatably slidably fitted to the stem which is located closer to one end side of the stem than the handle tubular body. Abutting on the handle cylinder and pushing it toward the other end of the stem,
And a pressing cylinder body urged so as not to come off from the one end side of the stem, the handle is fixed to the handle cylinder body so as to be rotatable with respect to the stem, and the handle cylinder body and the pressing body An operating mechanism for a walking-type parking brake, wherein an abutting surface of the cylindrical body is an inclined surface that allows rotation of the handle and sets a predetermined posture of the handle in a free state. 2. When the handle is pulled toward the one end of the stem against the biasing force of the pressing cylinder, the handle and the stem are engaged with each other so that rotation is transmitted between them. An operating mechanism for a walking stick type parking brake according to claim 1, wherein an engaging means is provided.