JPH10264787A - Vehicular foot-operated parking brake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the assembling property of a parking brake device such that a parking brake can be put into action and released by a pedaling operation and reduce its cost by reducing the number of part items thereof. SOLUTION: This vehicular foot-operated parking brake device includes a pedal arm 13 rotating between a brake releasing position and a brake applying position and normally activated toward the brake releasing position and to which a cable 17 is connected; a pole 21, rotating between an engaged position where it is engaged with a ratchet 12e and a released position where it is released from the ratchet 12e, and sliding between its original position and sliding position; a plate spring 22 which normally activates the pole 21 toward the original position and which, when the pole 21 held in the original position is in the engaged or released position, resiliently holds the pole 21 in the engaged or released position and which, when the pole 21 is held in the sliding position, activates the pole 21 toward the released position; and a pushing member 12f which rotates the pole 21 at the original position from the released position to the engaged position when the pedal arm 13 returns to the brake releasing position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foot-operated parking brake device for a vehicle, and more particularly to a parking brake device capable of releasing a parking brake by performing the same operation (pedal depression operation) as when the parking brake is operated.

[0002]

2. Description of the Related Art A foot-operated parking brake device for a vehicle of this type is disclosed, for example, in Japanese Patent Application Laid-Open No. 9-30383.

[0003]

The parking brake device described in the above publication is provided with a mounting bracket fixed to a vehicle body, and mounted on the bracket so as to be rotatable about a substantially horizontal axis. A pedal arm that pivots between a brake release position and a brake application position and is connected to a parking brake cable, a return spring that constantly biases the pedal arm toward the brake release position, and is formed in an arc shape. A ratchet integrally provided on the pedal arm so as to be concentric with the axis of the pedal arm; and a bracket rotatable around the axis parallel to the axis of the pedal arm on the bracket. Slidably mounted in the direction of movement,
A pole that pivots between an engagement position that engages the ratchet and a disengagement position that disengages from the ratchet, and that slides between an original position and a slide position; and the bracket has a center on an axis parallel to the axis of the pedal arm. The pawl is pivotably mounted to rotate between a release rotation position and a non-release rotation position, and is pushed by the pole when the pole slides to the slide position, and is released from the non-release rotation position to the release rotation position. A release lever that is pivoted to, and is interposed between the pawl and the release lever to constantly urge the pawl to slide toward its original position, and that the release lever is moved to a non-release pivot position. In the held state, the pawl is urged toward the engagement position, and the release lever is held in the release rotation position. And a spring for urging the pawl toward the release position, and engaging the release lever when the pedal arm returns to the brake release position to rotate the release lever from the release rotation position to the non-release rotation position. And a moving push member.
Since the rotation of the pawl between the engagement position and the disengagement position is controlled by the release lever and the spring, the number of parts is reduced, the assemblability is improved, and the cost is reduced. There is room for improvement intended.

[0004]

SUMMARY OF THE INVENTION The present invention has been made on the basis of the above-described viewpoint, and comprises a foot-operated parking brake device for a vehicle, a mounting bracket fixed to a vehicle body, and a bracket. A pedal arm that is rotatably mounted about a substantially horizontal axis, rotates between a brake release position and a brake application position, and is connected to a parking brake cable; The bracket (or the pedal arm) is formed in an arc shape and is concentric with the axis of the pedal arm.
A ratchet integrally provided on the pedal arm (or the bracket), being attached to the pedal arm (or the bracket) so as to be rotatable around an axis parallel to the axis of the pedal arm and slidable in the rotation direction of the pedal arm; A pole that pivots between an engagement position that engages the ratchet and a disengagement position disengaged from the ratchet, and that slides between an original position and a slide position; and a pole that is assembled to the pedal arm (or the bracket). Engage with the pole and always urge to slide the pole toward the original position, and when the pole is in the engaged position while being held in the original position, move the pole to the engaged position. Resiliently, and when the pole is in the disengaged position while being held in the original position, the pole is resiliently held in the disengaged position; When the pawl is held in the slide position, the leaf spring biases the pawl toward the disengagement position, and engages with the pawl when the pedal arm returns to the brake release position, thereby resetting the pawl. And a pushing member that rotates from the disengagement position to the engagement position at the position.

[0005]

In the foot-operated parking brake device for a vehicle according to the present invention, when the pedal arm is at the brake release position, the pawl is at the original position and is in the engaged position. When the arm is depressed and turned to the brake operating position, the engaging portion between the pawl and the ratchet moves accordingly. In this state, the pawl is resiliently held in the engagement position by the leaf spring, and when the pedal arm is released, the pulling force acting on the parking brake cable in a state where the pawl and the ratchet are held in engagement is maintained. This causes the pedal arm to return slightly, at which time the pole slides from the original position to the sliding position. When the pawl is slid to the sliding position, the pawl is urged toward the disengaged position by the leaf spring, but the pawl and the ratchet are held engaged by the tensile force acting on the parking brake cable. Even at the slide position, the rotation is maintained at the engagement position and does not rotate.

In this state, when the pedal arm is depressed and turned to the braking position against the pulling force acting on the parking brake cable, the pulling force acting on the parking brake cable is released, and the pawl is moved. Since the spring is rotated to the disengagement position, the engagement between the pawl and the ratchet is released, and the pawl is pushed from the sliding position to the original position by the leaf spring. Therefore, when the pedal arm is subsequently depressed, the pedal arm rotates toward the brake release position due to the action of the return spring, and when the pedal arm returns to the brake release position, the pedal arm is resiliently moved from the original position to the release position. The pole, which is temporarily held, is rotated from the disengaged position toward the engaged position by the pushing member. As a result, when the pedal arm returns to the brake release position, the pawl is set to the engaged position at the original position.

The foot-operated parking brake device for a vehicle according to the present invention has a structure in which the rotation of the pawl between the engaged position and the disengaged position is controlled by a leaf spring. As a result, the number of components can be reduced (the number of release levers can be reduced), and the assemblability can be improved and the cost can be reduced.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. In the foot-operated parking brake device for a vehicle according to the present invention shown in FIGS. 1 and 2, a pedal arm 13 which is stepped on a bracket 12 fixed to a vehicle body 11 shown by a virtual line in FIG. Is mounted so as to be rotatable around a shaft 14 of the motor. Bracket 12
Has mounting portions 12a, 12b, 12c to the vehicle body 11 and a mounting portion 12 for mounting the rubber stopper 15.
d, and is integrally provided with a ratchet 12e. The ratchet 12 e is formed in an arc shape and is provided integrally with the bracket 12 so as to be concentric with the shaft 14 of the pedal arm 13.

The pedal arm 13 is rotatably mounted on a shaft 14 fixed to the bracket 12, and has a brake release position indicated by a solid line in FIG. 1 and a brake operation position indicated by an imaginary line in FIG. One end is locked to the bracket 12 and the other end is locked to the pedal arm 13 so that the return spring 16 is disposed coaxially with the shaft 14 so as to always move toward the brake release position. Being energized. A fan-shaped guide 18 holding one end of a parking brake cable 17 shown by a dashed line in FIG. 1 is fixed to the pedal arm 13 using a pair of screws 19, and a pawl 21 and a leaf spring 22. Has been assembled. The other end of the parking brake cable 17 is connected to a braking unit (not shown) as is well known,
The parking brake cable 17 is pulled by rotating the pedal arm 13 in the counterclockwise direction in the drawing, so that a braking action is obtained at the braking portion. At this time, a tensile force acts on the parking brake cable 17. It has become.

The pawl 21 has pawls 21a engaging with the ratchet 12e and engaging portions 21b, 21 engaging with the leaf spring 22.
c and a long hole 21d, and is attached to the pedal arm 13 at the long hole 21d so as to be rotatable about an axis 23 parallel to the axis 14 of the pedal arm and slidable in the rotation direction of the pedal arm 13. Between the engagement position (the broken line position in FIG. 1 and the solid line position in FIG. 3) engaging with the ratchet 12e and the disengagement position (the virtual line position in FIG. 1 and the broken line position in FIG. 3) separated from the ratchet 12e. And slides between an original position (the position shown in FIGS. 3, 4, and 5) and a slide position (the position shown in FIG. 6). When the pedal arm 13 returns to the brake release position, the pawl 21 engages with the pushing piece 12f provided integrally with the bracket 12, and rotates from the disengagement position toward the engagement position at the original position. It is supposed to be.

The leaf spring 22 includes an engaging portion 21 of the pawl 21.
b, 21c, respectively, and has a pair of shafts 24,
The arm 21 is attached to the pedal arm 13 by using a holding piece 13a formed by cutting and raising a part of the pedal arm 13 and a part thereof. With the momentum, Paul 21
3 is held in the original position by the engaging pieces 22a or 22b as shown in FIGS. 3 to 5 (in the state of FIG. 3 by the action force of the engaging piece 22a, and in the state of FIG. 4). Engaging piece 2 larger than the acting force of engaging piece 22a
2b, and in the state of FIG.
2a and 22b), the pole 21 is urged toward the engagement position to resiliently hold the same, and in a state where the pole 21 is held in the slide position, the engagement is performed as shown in FIG. The pole 21 is urged toward the disengagement position by the action force of the joint piece 22a and is held resiliently.
In each of FIGS. 3 to 6, the working angles θ3, θ4, θ5, and θ6 of the working force obtained by the engaging pieces 22a are different in magnitude, and the relation of θ6>θ3>θ5> θ4 is different. Has become.

In the embodiment constructed as described above, when the pedal arm 13 is at the brake release position as shown by the solid line in FIG. 1, the pole 21 is moved by the broken line in FIG. 1 and the solid line in FIG. As shown in the figure, the engaging position is at the original position. In this state, when the pedal arm 13 is depressed and turned to the braking operation position shown by the phantom line in FIG. The engagement portion of the ratchet 12e moves through the state shown in FIGS. In this state, the pawl 21 is resiliently held at the engagement position by the leaf spring 22, and when the pedal arm 13 is depressed, the parking brake cable is held in a state where the engagement between the pawl 21 and the ratchet 12 e is maintained. 17, the pedal arm 13 is slightly returned by the pulling force acting on
At this time, the pole 21 slides from the original position to the slide position, as shown in FIG. In the state of FIG. 6 in which the pawl 21 is slid to the sliding position, the pawl 21 is urged in the counterclockwise direction toward the disengaged position by the leaf spring 22, but the pawl 21 is pulled by the tensile force acting on the parking brake cable 17. Since the engagement of the ratchet 12e is held, the pawl 21 is held at the engagement position and does not rotate even in the sliding position.

In this state, when the pedal arm 13 is depressed and turned to the braking operation position against the tensile force acting on the parking brake cable 17, the tensile force acting on the parking brake cable 17
, And the pawl 21 is rotated to the disengaged position by the leaf spring 22, so that the pawl 21 and the ratchet 12e
Is disengaged, and the pawl 21 is
As a result, it is pushed from the slide position to the original position, as shown by a virtual line in FIG. Therefore, when the depression of the pedal arm 13 is subsequently released, the pedal arm 1 is released.
3 rotates toward the brake release position shown by the solid line in FIG. 1 by the action of the return spring 16 and is resiliently held at the original position at the release position when the pedal arm 13 returns to the brake release position. The pawl 21 is rotated from the disengaged position to the engaged position by the pushing piece 12f provided on the bracket 12. As a result, when the pedal arm 13 returns to the brake release position, the pawl 12 is brought into the engaged position at the original position as shown by the broken line in FIG.

In the vehicle foot-operated parking brake device of the present embodiment, the pawl 21 is
2, the rotation between the engagement position and the disengagement position is controlled, so that the number of parts can be reduced as compared with the conventional device, and the assemblability can be improved and the cost can be reduced. Can be planned.

In the above embodiment, the ratchet 12
e and the pushing piece 12f are integrally provided on the bracket 12, and the pawl 21 and the leaf spring 22 are
Although the present invention has been implemented by assembling the bracket 3 with the present invention, it is also possible to implement the present invention by assembling the ratchet and the pushing piece integrally with the pedal arm and assembling the pawl and the leaf spring to the bracket.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a foot-operated parking brake device for a vehicle according to the present invention.

FIG. 2 is a diagram viewed from a left direction in FIG.

3 is an operation explanatory view of the parking brake device shown in FIG. 1 in a state where a pedal arm is at a brake release position and a pawl is at an original position and is at an engagement position.

4 is an operation explanatory view of the parking brake device shown in FIG. 1 in a state in which a pedal arm is depressed from a brake release position and a pawl has passed over a ratchet tooth tip.

5 is an operation explanatory view of the parking brake device shown in FIG. 1 in a state where a pedal arm is depressed from a brake release position and a pawl meshes with a ratchet tooth;

6 is an operation explanatory diagram of the parking brake device shown in FIG. 1 in a state where a pedal arm is at a braking operation position and a pawl is at a sliding position.

[Explanation of symbols]

11 ... body, 12 ... bracket, 12a, 12b, 12
c: attachment part to vehicle body, 12d: attachment part of rubber stopper,
12e: ratchet, 12f: push piece (push member), 1
3 pedal arm, 14 pedal arm shaft, 15 rubber stopper, 16 return spring, 17 parking brake cable, 21 pawl, 22 leaf spring,
23: An axis parallel to the axis of the pedal arm.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masaya Miyahara 12 Aisin Light Metal Co., Ltd. at 12 Nagoe, Shinminato City, Toyama Prefecture

Claims (1)

[Claims] 1. A parking brake cable, comprising: a mounting bracket fixed to a vehicle body; a mounting bracket rotatably mounted on the bracket about a substantially horizontal axis to rotate between a brake release position and a brake operation position; A return arm that constantly urges the pedal arm toward the brake release position; and a bracket that is formed in an arc shape and is concentric with the axis of the pedal arm. A ratchet provided integrally with the arm; and a ratchet attached to the pedal arm or the bracket so as to be rotatable about an axis parallel to the axis of the pedal arm and slidable in a rotating direction of the pedal arm. Rotates between an engagement position for engaging the ratchet and a disengagement position disengaged from the ratchet, and A pole that slides between the id positions; and a pawl that is attached to the pedal arm or the bracket and engages with the pawl to constantly urge the pawl to slide toward the home position, and that the pawl is in the home position. The pole is resiliently held at the engagement position when the pawl is in the engaged position while the pawl is held at the original position. A leaf spring that resiliently holds the disengagement position and urges the pole toward the disengagement position when the pawl is held in the slide position; and A foot-operated parking brake device for a vehicle, comprising: a pushing member that engages with a pole and rotates the pole from its disengaged position to its engaged position at an original position.