JP2512970Y2 - Manual parking brake operating device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual parking brake operating device, and more particularly to a technique for preventing rattling of a brake operating lever.

2. Description of the Related Art As a manual parking brake operating device, for example,
There is one described in Japanese Utility Model Publication No. 57-34024. This parking brake operating device includes (a) a bracket fixed to a vehicle body, and (b) a brake operation that is rotatably supported by the bracket and has a grip at a tip end, which is rotated by a driver's hand. A lever, (c) a plurality of engaging teeth formed on one of the bracket and the brake operating lever, and (d) rotatably provided on the other of the bracket and the brake operating lever. The parking brake connected to the brake operating lever is activated by the driver manually rotating the brake operating lever from the brake release position to the brake operating position. The parking brake is actuated by maintaining the brake operating lever in its braking position by the engagement of the pawl and the engaging tooth. It is adapted to be maintained in the state.

In this parking brake operating device, a stopper member is attached to the bracket, and the amount of rotation thereof is regulated by the brake operating lever contacting the stopper member. Although the material of the stopper member is not described, if it is made of synthetic resin or an elastic member such as rubber, it is possible to reduce the collision noise when the brake operating lever comes into contact with the bracket, and the brake operating The lever can be operated quietly.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-mentioned manual parking brake operating device, rattling occurs in the brake operating lever in a direction intersecting the rotation plane, and the brake operating lever and the bracket repeatedly collide with each other. There is a problem that abnormal noise may occur. In particular, when the vehicle is traveling, the brake operation lever is at the brake release position, and little force is applied to the brake operation lever from the parking brake side, so rattling is likely to occur.

Therefore, in view of the above problem, the present invention has an object to obtain a manual parking brake operating device capable of favorably preventing rattling of a brake operating lever at a brake release position.

Means for Solving the Problems And, the gist of the present invention is to provide the (a) bracket,
In a manual parking brake operating device including (b) a brake operating lever, (c) engaging teeth, and (d) a pole, the brake operating lever has an abutted surface that is substantially parallel to the brake operating lever rotating plane of the bracket. A rattling prevention member that elastically abuts on the brake operation lever and prevents rattling in a direction intersecting the rotation plane of the brake operation lever is provided, and the position of the rattling prevention member is set to the position of the brake operation lever. The position is such that it contacts the abutted surface of the bracket at the brake release position and its vicinity, but does not make contact during the rotation process to the brake operating position.

The rattling prevention member may come into contact with only one side of the plane parallel to the lever rotation plane or both sides thereof. In the former, one surface is the contacted surface, and in the latter, both surfaces are the contacted surfaces.

Action In the manual parking brake operating device configured as described above, in the vicinity of the brake release position,
The rattling prevention member provided on the brake operating lever
The bracket is elastically contacted with a contacted surface that is substantially parallel to the brake operation lever rotation plane to prevent relative movement between the brake operation lever and the bracket in a direction intersecting the brake operation lever rotation plane. Rattling of the operating lever is prevented. Then, when the brake operating lever is pivotally operated from the brake release position to the brake operating position in order to put the parking brake into the operating state, the rattling prevention member is disengaged from the bracket and brought into a non-contact state.

Effect of the Invention Therefore, when the brake operating lever is in the brake release position and in the vicinity thereof, the generation of noise due to rattling of the brake operating lever is favorably avoided. Moreover, as compared with the case where the rattling prevention member is always in contact with the bracket, the amount of sliding of the rattling prevention member accompanying the rotation of the brake operating lever can be small, so that the rattling prevention member The effect of reducing wear and the effect of lightening the operation of the brake operating lever are obtained. Vibration of the vehicle body that causes rattling of the brake operating lever is large when the vehicle is running, and the brake operating lever is in the brake release position during the running, and the parking brake side shifts to the brake operating lever as described above. Since almost no force is applied, the brake operating lever is in a state of easily vibrating. Therefore, the rattling prevention member is brought into contact with the bracket only at the brake release position and its vicinity to prevent rattling, and in other cases, the rattling prevention member is set in the non-contact state to avoid unnecessary wear and perform the operation lightly. Getting it is rational.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 and 2, 10 is a bracket. The bracket 10 is fixed to a vehicle body (not shown) with bolts. A brake operation lever (hereinafter, simply referred to as a lever) 12 is attached to the bracket 10.
The lever 12 is composed of a base portion 18 having side walls 14 and 16 and having a U-shaped cross section, and a cylindrical grip portion 20, and the base portion 18 is disposed across the bracket 10 and the base portion 18 is A connecting portion 22 formed below is rotatably connected to the bracket 10 by a pin 24. Further, one end of a brake cable 26 is connected to the connecting portion 22. A knob 28 is slidably fitted to the tip of the grip portion 20 of the lever 12, and is biased in the projecting direction by the elastic force of a coil spring (not shown) provided in the grip portion 20. Further, a grip 30 is attached to the outer periphery of the grip portion 20 of the lever 12.

A portion of the bracket 10 located between the side walls 14, 16 of the base 18 of the lever 12 has a sector portion 36 having a plurality of engaging teeth 34.
Are formed. The engagement teeth 34 are formed along an arc centered on the axis of the pin 24, which is the rotation centerline of the lever 12. On the other hand, inside the side walls 14 and 16 of the lever 12, a pole 38 is attached by a pin 40 so as to be rotatable in a rotation plane parallel to the rotation plane of the lever 12. Paul 38
An arm 42 and a claw portion 44 engageable with the engagement tooth 34, and the arm 42 is rotatably connected to a rod 46 connected to the knob 28 through the grip 20 of the lever 12. The coil spring urges the claw portion 44 in a direction to engage the engaging tooth 34. Therefore, when the driver manually rotates the lever 12 in the direction shown by the arrow in FIG. 1, the brake cable 26 is pulled, and as shown in FIG. 2, the pawl portion 44 of the pole 38 is pulled.
Engages with the engaging teeth 34 of the sector portion 36 to maintain the parking brake in the activated state.

The lever 12 has a rattling prevention member 50 that also functions as a stopper.
Is attached. The rattling prevention member 50 is made of a synthetic resin having excellent elasticity and abrasion resistance such as polyester elastomer, and as shown in an enlarged view of FIG. And a section 54. The stopper portion 52 has a cylindrical shape, and the rattling prevention portion 54 includes a pair of arms 56 and 58 extended from both ends of the lower portion of the stopper portion 52. The arms 56, 58 have a plate shape, and the arms 56, 58 are bent in a direction in which the arms 56, 58 approach each other, and a space therebetween is narrower than a width of the locking portion 60 of the bracket 10, and the arms 56, 58. Each end of 58 is provided with U-shaped groove portions 64 and 66 formed by bending outward.

The rattling prevention member 50 is provided between the side walls 14 and 16 of the lever 12 in a state where the lower ends of the side walls 14 and 16 are fitted in the grooves 64 and 66 of the rattling prevention unit 54, respectively. By inserting the pin 68 through the 16 and the stopper portion 52, the pin 68 is non-rotatably fixed around the pin 68. Therefore, when the lever 12 is in the position shown in FIG. 1, that is, in the brake release position, the locking portion 60 of the bracket 10 is fitted between the arms 56 and 58, and the upper end surface 70 of the locking portion 60 is a stopper. The rotation limit of the lever 12 is defined by contacting the portion 52. Further, the locking portion 60 has side surfaces 72 and 74 parallel to the rotation plane of the lever 12, and the side surfaces 72 and 74 have arm portions.
56 and 58 elastically abut. The side surfaces 72 and 74 function as contacted surfaces.

In the manual parking brake operating device configured as described above, when operating the parking brake, the driver grips the grip 30 and rotates the lever 12 in a direction indicated by an arrow in FIG. 1 by a predetermined angle. Then, the lever 12 is brought into the state shown in FIG. 2, the predetermined engaging teeth 34 and the claw portion 44 are engaged with each other, and the parking brake is maintained in the operating state.
The position of the lever 12 at this time is the braking position,
At this position, the rattling prevention member 50 is separated from the locking portion 60 of the bracket 10.

On the other hand, to release the parking brake, push the knob 28 with the thumb of the hand holding the grip 30 of the driver,
The rod 46 moves against the elastic force of the coil spring,
Since the pawl 38 rotates clockwise in the drawing to release the engagement between the claw portion 44 and the engaging tooth 34, the lever 12 may be rotated in the direction opposite to the arrow in that state. When the lever 12 is rotated to the vicinity of the brake release position shown in FIG. 1, the locking portion 60 pushes the narrowed portion 62 of the rattling prevention portion 54 and fits between the arms 56 and 58. However, since the side walls 14 and 16 of the lever 12 are fitted into both the groove portions 64 and 66 of the arms 56 and 58, and the side walls 14 and 16 prevent the arms 56 and 58 from expanding, the arm 56 and 58 are prevented from expanding. Is elastically deformed between the side wall 14 and the side surface 72 of the locking portion 60, and the arm 58 is elastically deformed between the side wall 16 and the side surface 74 of the locking portion 60. The side surface and both side surfaces 72, 74 of the locking portion 60 elastically abut. This prevents the lever 12 and the locking portion 60 from moving relative to each other in the direction perpendicular to the side walls 14 and 16 and the side surfaces 72 and 74, that is, in the direction intersecting the rotation plane of the lever 12,
The rattling of the lever 12 is effectively prevented.

If the lever 12 is further rotated from that state, the upper end surface 70 of the locking portion 60 contacts the stopper portion 52 of the rattling prevention member 50 and prevents further rotation. At this time, since the stopper portion 52 is made of synthetic resin, the collision noise between the upper end surface 70 of the locking portion 60 and the stopper portion 52 is reduced, and the lever 12 can be gently rotated.

Since the rattling prevention member 50 of this embodiment is manufactured by integral molding, there is an advantage that the manufacturing cost is low. Moreover, because it is made of synthetic resin with excellent elasticity and wear resistance,
Both effects of reducing the contact noise between the lever 12 and the locking portion 60 and preventing rattling of the lever 12 can be favorably enjoyed over a long period of time.

FIG. 4 shows a rattling prevention member 80 which is another embodiment of the present invention. Since the other members are the same as those in the above-described embodiment, the same reference numerals are given and detailed description will be omitted.

The rattling member 80 includes a stopper portion 82 made of rubber and a rattling prevention portion 84 made of a spring steel plate. The rattling prevention portion 84 has a U-shape with a pair of arms 86 and 88 and a connecting portion 90 that connects the arms 86 and 88, and is fixed to the side walls 14 and 16 by spot welding. . Arm 86,88
A polytetrafluoroethylene coating 91 is applied to the tip of this to reduce the generation of abnormal noise and wear during sliding contact with the engaging portion 60, and to prevent the stopper portion from being formed on the inner surface of the connecting portion 90. Part of the outer peripheral surface of 82 is bonded.

The tips of the arms 86 and 88 are bent in an arc shape to guide
2 and the narrowed portion 94 are continuously formed. The width of the tip of the guide portion 92 is made wider than the width of the locking portion 60, while the width of the narrowed portion 94 is made narrower than the width of the locking portion 60. Therefore,
The locking portion 60 is guided by the guide portion 92 and fits into the narrowed portion 94, and the arms 86 and 88 elastically contact both side surfaces 72 and 74 of the locking portion 60 to hold the locking portion 60. , Prevent rattling of the lever 12. That is, in the above embodiment, the lever 12
And the locking portion 60, the arms 56 and 58 are sandwiched between the side walls 14 and 16 and the side surfaces 72 and 74 and elastically deformed so as to come into contact with the locking portion 60. In the embodiment, the elastic force of the arms 86 and 88 contact the side surfaces 72 and 74 of the locking portion 60.

Further, in the present embodiment, since the stopper portion 82 is made of rubber, it has a high collision noise preventing effect when the upper end surface 70 of the locking portion 60 abuts, and the rattling preventing portion 84 is a spring. Since it is made of steel plate and is coated with polytetrafluoroethylene, which has a high elastic deformation capacity and a low friction coefficient and excellent wear resistance, it provides a rattling prevention member with a long device life and excellent sound absorption effect. be able to.

In the above-mentioned two embodiments, the rattling prevention member has both the function of preventing rattling of the lever and the function of preventing collision noise when the lever is operated to the brake release position. In addition, these were integrated or integrally configured to reduce the cost, but only the rattling prevention member and the collision noise prevention function provided only with the function of preventing rattling of the lever. The stopper member provided with may be provided separately, or only the rattling prevention member may be provided.

Besides, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a manual parking brake operating device according to an embodiment of the present invention. FIG. 2 is a partially cutaway front view showing an operating state of the device different from that of FIG. 1, and FIG. 3 is a side sectional view showing a rattling prevention member of the device and its periphery. FIG. 4 is a side sectional view showing a rattling prevention member and its surroundings of a manual parking brake operating device according to another embodiment of the present invention. 10: Bracket 12: Brake operation lever 34: Engaging tooth, 38: Pole 50: Anti-rattle member 54: Anti-rattle part, 60: Locking part 72, 74: Side surface, 80: Anti-rattle member 84: Anti-rattle part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Nakamura 1 Toyota-cho, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd. (72) Kenichi Hasegawa Kenichi Hasegawa, 10-way, Wakai-cho, Aichi Prefecture Hosei Break Industries Incorporated (56) References Japanese Patent Laid-Open No. 56-57544 (JP, A) Actually developed 56-44950 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A bracket fixed to a vehicle body, a brake operation lever rotatably supported by the bracket, and a grip provided at a tip end thereof to be rotated by a driver's hand, and the bracket and the brake operation. A plurality of engaging teeth formed on either one of the lever and a bracket rotatably provided on the other of the bracket and the brake operating lever, and the pawl capable of engaging with the engaging teeth; In a manual parking brake operating device for maintaining a parking brake connected to a brake operating lever in an operating state by locking a pawl and engaging teeth in a state in which a lever is pivotally operated from a brake release position to a brake operating position. The brake operating lever is elastically abutted on a contacted surface of the bracket, which is substantially parallel to the brake operating lever rotating plane. A rattling prevention member for preventing rattling of the rake operation lever in a direction intersecting with the rotation plane is provided, and the position of the rattling prevention member is set to the brake release position of the brake operation lever and its position. The manual parking brake operating device is characterized in that it is brought into contact with the abutted surface of the bracket in the vicinity thereof but is not brought into contact with it in the process of rotating to the brake acting position.