JPH063729Y2 - Parking brake operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an improvement of a parking brake operating device used for operating a parking brake for a vehicle.

[Prior Art] A parking brake operating device for a vehicle is formed so that a parking brake can be operated simply by gripping a grip of an operating lever and rotating the operating lever all at once by a predetermined angle.

However, in this type of operating device, when the operating lever is turned, the claw member and the locking tooth engage intermittently, so that a striking sound is continuously generated, which becomes noise and becomes a noise in the passenger compartment. There was a problem of sounding.

In particular, in recent years, there has been a strong demand to reduce noise in the passenger compartment as much as possible, and therefore, it is required to reduce noise when the claw member and the sector are engaged with each other.

FIG. 3 shows an example of a conventional parking brake operating device. The conventional device includes a sector 10 fixed to a vehicle body, a sector 10 rotatably supported by the sector 10, and a brake operating cable 12. The combined operation lever 14 and the operation lever 14 are rotatably supported by the operation lever 14,
Pole 16 which is a claw member engageable with the sector 10
And a knob 20 that is provided in a grip 18 of the operating lever 14 so as to be retractable and retractable, and a rod 22 that is a transmission member that disengages the pole 16 from the sector 10 in conjunction with the pushing of the knob 20.

Then, the pole 16 and the side plates 14a, 1 of the operating lever 14
4b (only one of which is shown) is stretched by a first spring 30 so that the pawl 16 is rotationally biased in a direction in which it engages with the locking teeth 10a of the sector 10. A second spring 26 stretched between the knob 20 and a stopper 24 provided on the operation lever 14 urges the knob 20 in a protruding direction, whereby the tip portion of the rod 22 is pushed. Is always engaged with the fixing pin 28, and the rod 22 and the pole 1 are not in operation except when the knob 20 is pushed.
It is configured so that there is no engagement relationship with 6.

In the device having the above structure, the engagement load of the pole 16 with respect to the sector 10 is determined only by the spring force of the first spring 30, and is completely separated from the bias for exerting the return load of the knob 20. Since the two-division system is adopted, the impact sound of the pole 16 can be reduced without impairing the operation feeling of the knob 20.

FIG. 4 and FIG. 5 are a partial left side view showing a mounting portion of the first spring 30 shown in FIG. 3 in an enlarged manner and a II-II partial sectional view in FIG.

As shown in FIG. 5, the rotary shaft 32 of the pole 16 has a shaft hole a of the pole 16 and the shaft holes b of the pair of side plates 14a and 14b constituting the operating lever 14 arranged coaxially. It is rotatably supported by inserting the rotary shaft 32 into the. The rotary shaft 32 includes a shaft body 32a and a flange portion 32b.
And a step portion 32c for locking the side plate 14a is further formed on the shaft body 32a. And the rotating shaft 3
A C washer 34, which is a ring-shaped member, is attached to the tip of 2.

The first coil spring 30, as shown in FIG.
A pair of coil parts 30a, 30a and these coil parts 3
It is composed of a U-shaped connecting locking portion 30b for connecting one end of each of 0a and 30a, and a key-shaped locking portion 30c, 30c extending from the other end of each of the coil portions 30a, 30a. . The one coil portion 30a of the first spring 30 is between the flange portion 32b and the side plate 14c, and the other coil portion 30a is the C washer 34.
Between the side plate 14b and the other side plate 14b.
It is wound around 2a. In addition, the connection locking portion 30b of the first spring 30 is locked to the edge portion of the pole 16, while the pair of key-shaped locking portions 30c and 30c are connected to the operating lever 14.
Of the side plates 14a and 14b are respectively locked.

[Problems to be Solved by the Invention] However, in the apparatus having the above-described configuration, since there is no member that supports the C washer, which is a ring-shaped member, from the side surface, the tip portion of the rotary shaft 32 cannot be crimped, The tip of the shaft body 32a is locked only by the C washer 34. Therefore, the mechanical strength of the locking portion at the tip of the shaft body 32a is insufficient, and it is difficult to sufficiently increase the axial positional accuracy and the rigidity of the entire operating lever.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a parking brake operating device that solves the above-mentioned problems and can configure the entire operating lever in a state of high mechanical strength and high reliability.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an operating lever for operating a parking brake, a fixed support that rotatably supports the operating lever, and has locking teeth on the outer circumference. Sector, a claw member rotatably supported by the operation lever and engageable with the sector, and a first biasing member for rotationally displacing the claw member from a non-engaging position to an engaging position. In the grip portion of the operation lever, an operation knob that is arranged to be retractable through a second urging member, and the pawl member is rotated from an engagement position to a non-engagement position by pushing the operation knob. A transmission member for displacing the first urging member, the first urging member is formed of a torsion coil spring, and the rotation shaft of the claw member is a hole formed to project outward in a side plate of the operation lever. Insert into the flange -Supported, the coil portion of the torsion coil spring is wound around the outer periphery of the hole flange portion, and further, a ring-shaped member is provided at the tip of the rotating shaft in contact with the end face of the hole flange portion. The front end of the rotary shaft is crimped via the ring-shaped member.

[Operation] In the device having the above-described configuration, the shaft hole of the operation lever through which the rotary shaft of the claw member is inserted is a hole flange portion that projects outward, and the ring is provided at a position where it abuts the tip end surface of the hole flange portion. By providing the ring-shaped member, the ring-shaped member can be supported by the end surface of the hole flange portion, and in this state, the tip of the rotary shaft can be swaged.

As a result, rattling of the ring-shaped member mounting portion is eliminated and mechanical strength is increased. Therefore, the positional accuracy in the axial direction of the rotary shaft is improved, and highly reliable assembly is possible. The rigidity of is improved.

Also, by using the shaft hole in the operating lever as a hole flange part, not only the mechanical strength of the shaft hole part is improved, but also the contact area between the rotary shaft and the shaft hole part is increased, so the support of the rotary shaft is stable. Moreover, it can be performed with high accuracy.

[Embodiment] Next, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

1 and 2 show a preferred example of a parking brake operating device according to the present invention.

In the apparatus of the present embodiment, the sector 40 is attached and fixed to the vehicle body 42, and the sector 40 has locking teeth 40a formed on a fan-shaped outer periphery whose center position is O ₁ .

The sector 40 is provided with an operation lever 50 which is rotatable about a rotation shaft 44 arranged at the center O ₁ . A brake cable 51 is connected to one end of the operation lever 50 on the right side of the center O ₁ , and the cable 51 is operated by the rotation of the operation lever 50.

A pole 60, which is an example of a claw member, is attached inside the operation lever 50. This pole 60
Are rotatably supported around a rotary shaft 62 provided in the operation lever 50. The pole 60 is formed in a substantially V shape, and one end thereof is a pawl 64 that engages with the locking tooth 40a of the sector 40.

In addition, the rotation shaft 62 of the pole 60 is twisted as a first biasing member that biases the pole 60 in the counterclockwise direction in the drawing and presses the claw 64 against the locking tooth 40a of the sector 40. A coil spring 66 is attached. The mounting portion of the torsion coil spring 66 will be described in detail later.

Further, the pole 60 is formed so as to rotate clockwise against the biasing force of the torsion coil spring 66 by a pressing operation of a rod described later. A pole stopper 68 is provided inside the operating lever 50 in order to regulate the clockwise rotation range.

Further, in the present embodiment, the operation lever 50 has a shape in which an end portion inclined obliquely upward is horizontally formed on the left side of the center O ₁ , and the horizontal end portion is curled into a cylindrical shape. A grip 54 is fitted and fixed to the horizontal tubular portion 52.

An operation knob 56, which can be pushed, is arranged at the end of the grip 54 so as to be retractable.

A coil spring 59, which is a second biasing member, is provided between the back surface of the operation knob 56 and the stopper 58 in the horizontal tubular portion 52 of the operation lever 50.
Is urged to the left in FIG.

The operation knob 56 is formed of a material such as resin, and one end of a rod 80, which is an example of a transmission member, is connected to the operation knob 56. The free end side of the rod 80 is bent substantially in a U shape to form a locking portion 82, and the locking portion 82 is configured to be engageable with the stopper 84.

Further, the locking portion 82 of the rod 80 has an end portion facing the pole 60 with a gap therebetween, and by pressing the operation knob 56 against the biasing force of the torsion coil spring 66, The pole 60 can be rotated clockwise so that it disengages from the sector 40.

FIG. 2 is a partial sectional view taken along the line I-I in FIG. 1 showing the essential part of the present invention.

In this embodiment, the side plates 50a, 5 of the operating lever 50 are
0b (however, only one side plate 50b is shown in FIG. 1) is subjected to a burring process to form a hole flange portion f having a flange portion protruding outward.

Then, the hole flange portion f and the shaft hole a of the pole 60 are arranged coaxially, and the rotary shaft 62 is inserted.

The rotating shaft 62 includes a shaft body 62a and a shaft body 62a.
Flange portion 62b formed at one end of the shaft and the shaft body 62a
And a caulking portion 62c formed at the other end of the. The flange portion 62b of the rotary shaft 62 is in contact with the tip end face of one hole flange portion f of the operating lever 50, and the crimp portion 62c is provided through the C washer 70, which is a ring-shaped member, to the other hole flange portion. It is in contact with the end face of the portion f. A sleeve S is provided on the rotary shaft 62.

In the apparatus having the above-mentioned configuration, after the coil portion 66a of the torsion coil spring 66 is mounted on the outer periphery of the hole flange portion f of the operation lever 50, the rotary shaft 62 is inserted, and then the C washer is mounted, and then the rotary shaft is mounted. The tip of 62 can be crimped to form a crimped portion 62c. Since the structure and mounting method of the torsion coil spring 66 are the same as those in the above-described conventional art, detailed description thereof will be omitted.

Next, the operation of this embodiment will be described.

In the apparatus configured as described above, the shaft hole portions of the side plates 50a and 50b forming the operation lever 50 are formed as the hole flange portions f, so that the tip end of the rotating shaft 62 is swaged through the C washer 70 to swage the swaged portion 62c. Can be formed. As a result, the mechanical strength of the mounting portion of the C washer 70 is increased, and the coil portion 66a of the torsion coil spring 66 can be securely locked without shaking, and the axial assembly accuracy is greatly improved. improves.

Further, by constructing the shaft hole portion of the operation lever 50 as the hole flange portion f, not only the mechanical strength of the shaft hole portion itself is increased, but also the inner surface of the hole flange portion f and the rotary shaft 62.
The contact area of the outer peripheral surface of the rotary shaft 62 can be made sufficiently large, and the rotary shaft 62 can be supported stably and accurately.

From these points, the operating lever 50 has increased rigidity and mechanical strength as a whole, and the assembling accuracy is also improved.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made within the scope of the present invention.

[Effect of the Invention] According to the present invention, the tip of the rotary shaft of the claw member can be provided in a crimped state, and as a result, the mechanical strength and assembly accuracy of the operating lever can be greatly improved.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of an embodiment of a parking brake operating device to which the present invention is applied, FIG. 2 is a partial sectional view taken along the line II in FIG. 1, and FIG. 3 is a conventional parking brake operating device. FIG. 4 is an enlarged partial left side view showing a mounting portion of the pole shown in FIG. 3, and FIG. 5 is a partial sectional view taken along line II-II in FIG. 40 ... Sector 50 ... Operating lever 60 ... Pole 62 ... Rotating shaft 62c ... Crimping part 66 ... Torsion coil spring 70 ... C washer 80 ... Rod f ... Hole flange part

Claims (1)

[Scope of utility model registration request] 1. An operating lever for operating a parking brake, a fixed sector that rotatably supports the operating lever and has locking teeth on its outer periphery, and an operation lever that is rotatably supported by the operating lever. A claw member engageable with the sector, a first urging member for rotationally displacing the claw member from the non-engagement position to the engagement position, and a second urging member in the grip portion of the operation lever. The first urging member; and an operation knob that is arranged so as to be retractable through the operation knob, and a transmission member that rotationally displaces the claw member from the engagement position to the non-engagement position by pushing the operation knob. Is composed of a torsion coil spring, and the rotary shaft of the claw member is inserted and supported by a hole flange portion formed so as to project outward on the side plate of the operation lever, and the rotation shaft of the hole flange portion is formed on the outer periphery of the hole flange portion. Twisted carp The coil portion of the spring is wound, and further, a ring-shaped member is provided at the tip of the rotary shaft in contact with the tip end face of the hole flange portion, and the tip of the rotary shaft is crimped through the ring-shaped member. Parking brake operating device characterized by.