JP2000177547A - Foot parking brake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a brake cable from slipping off without a stopping claw piece by extending an inclined guide part which has an outward opening angle in an area from the midway of an arc-like part to a straight part and has a required extending width on the outer side wall of a cable guide groove. SOLUTION: An inclined guide part 20 is extended in an area from the midway of an arc-like part 11A to a straight part 11B on an outer side wall of a cable guide groove 11. The inclined guide part 20 is formed to be increased in the gradual extending width and an outward opening angle in the arc-like part 11A as it reaches the connecting part to the straight part 11B, and to have a required outward opening angle with a required extending width in a straight-like part 11B. By this arrangement, when the brake cable 15 is shifted out, the brake cable 15 is captured by the inclined guide part 20 and returned to the cable guide groove 11 along the inclination to stop the cable. Accordingly, the brake cable can be prevented from slipping off without a claw piece.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a foot-operated parking brake device for a motor vehicle.

[0002]

2. Description of the Related Art In a foot-operated parking brake device, an arc-shaped cable guide groove is provided around a pivot point on an outer periphery of a pivot side of a pedal lever pivotally supported on a base plate. The brake cable is circulated and accommodated in the groove, and the cable end is inserted and fitted into a socket portion provided on a substantially tangential extension of the cable guide groove and fixed, and the brake cable is operated by stepping on a pedal lever. Is known in which a parking brake is applied by pulling the vehicle.

A claw is provided on the outer side wall of the cable guide groove, and the claw is bent above the brake cable housed in the cable guide groove to prevent the cable from coming off. ing.

As described above, when the claws are bent and present above the brake cable, the brake cable sags due to the elongation of the brake cable over time, and comes off from the cable guide groove, or the pedal unit is mounted on the vehicle. At this time, the brake cable is prevented from coming off from the cable guide groove due to slackness.

That is, in the pedal unit, as described above, the brake cable is sub-assembled to the pedal lever, and the pedal lever is rotated in the maximum stepping direction so that the brake cable is fixed in the cable guide groove, and the pedal unit is moved to the vehicle assembly line. After the pedal unit is mounted on the vehicle body, the pedal lever is set to the depressed state when the floor carpet is laid, and the initial operation is performed by releasing the pedal lever. At this time, even if the brake cable is slackened, the claw piece prevents the brake cable from floating up and coming out of the cable guide groove.

[0006]

The above-mentioned claw piece is hit by a tool at the time of sub-assembly of the brake cable and is bent and deformed above the cable guide groove.
Not only does the sub-assembly man-hour increase, but also
At the time of this beating operation, there is a possibility that attached parts such as a parking switch arranged near the claw piece may be damaged.

Further, when replacing the brake cable, the operator must bend the claw piece back to the original standing position in the narrow space below the instrument panel, so that the workability is poor, and the brake cable is not easily replaced. At the time of replacement, it is possible to forget to bend the nail piece again to the disengagement prevention position.

Accordingly, the present invention provides a foot-operated parking brake device which can prevent the brake cable from coming off without using the above-mentioned come-off prevention claw pieces and can improve the workability at the time of assembly and at the time of replacing the brake cable. Is what you do.

[0009]

According to the first aspect of the present invention, a pedal lever is rotatably supported on one side surface of a base plate, and is formed in an arc around a pivot point on an outer periphery of a pivot side of the pedal lever. A cable guide groove having a curved arc portion is provided, and a socket portion inclined from the toe portion of the arc portion at an appropriate opening angle outwardly with respect to the side surface of the pedal lever over a substantially tangential extension thereof. A brake cable is circulated and accommodated in the cable guide groove, and a cable end is inserted and fitted into the socket portion and fixed, and the brake cable is pulled by operating a pedal lever to apply a parking brake. A straight portion extending from the toe portion of the arcuate portion in a substantially tangential direction to the cable guide groove. On the side wall, from the middle of the arc portion to the straight portion, the extension width and the opening angle to the outside are gradually increased as the arc portion reaches the portion connected to the straight portion, and And a slant guide section which is set to a required extension width and is opened outward and inclined.

According to a second aspect of the present invention, when the cable end is inserted into the socket portion, the cable end and the side wall are located between the outer side wall of the straight portion and the socket portion. The cable end relief portion is provided at a required separation interval capable of avoiding the interference of the cable end.

According to the third aspect of the present invention, the outer side wall of the straight portion according to the first aspect is formed up to a position close to the socket portion, and the entire height including the inclined guide portion of the side wall is braked. It is formed at a height equal to or higher than the lifting stroke due to the slack of the cable, and the inclined guide portion of the straight portion region is twisted from a continuous portion with the inclined guide portion of the arc portion region to approach the socket portion. It is characterized in that the outward opening angle is increased toward the terminal portion.

[0012]

According to the first aspect of the present invention, if the brake cable slacks around the cable guide groove when the pedal lever is released, the brake cable rises up from the cable guide groove, and particularly, the socket and the cable end are fixed. In the straight portion of the cable guide groove close to the portion, the floating amount is large, but the outer side wall of the cable guide groove is inclined with an open angle to the outside in a region extending from the middle of the arc portion to the straight portion. Since the inclined guide portion having the required extension width is extended, when tension acts on the brake cable once floating from the cable guide groove, the brake cable is caught by the inclined guide portion and follows the inclination of the inclined guide portion. To return to the cable guide groove to prevent the brake cable from coming off.

As described above, the brake cable can be prevented from being detached by the inclined guide portion on the side wall of the cable guide groove, and the conventional claw piece can be eliminated. It is possible to reduce the number of man-hours required to bend and deform by hitting the claw piece, and to prevent damage to attached parts around the claw piece at the time of hitting the claw piece. Bending work and forgetting to bend again can be eliminated, and workability can be significantly improved.

According to the invention described in claim 2, according to claim 1,
In addition to the effects of the invention, when the brake cable is sub-assembled, the brake cable is wrapped around and accommodated in the cable guide groove, and the cable end is inserted and fitted into the socket portion. A relief portion for the cable end is provided at a required separation interval between the cable end and the socket portion, so that the cable end does not interfere with the outer side wall of the straight portion when the cable end is inserted into the socket portion. Therefore, insertion can be performed smoothly, and workability of the subassembly can be improved.

According to the invention described in claim 3, according to claim 1 of the present invention,
In addition to the effect of the invention, the outer side wall of the straight portion of the cable guide groove is formed up to a position close to the socket portion, and the entire height including the inclined guide portion of the side wall of the straight portion is braked. The height is equal to or greater than the lifting stroke due to the slack of the cable, and the inclined guide portion of the straight portion region is twisted from the portion continuously provided with the inclined guide portion of the arc portion portion to form a socket portion. Since the angle of outward opening is increased toward the terminal part close to the cable, the outward deflection when the cable rises from the cable guide groove due to the slack of the brake cable slides on the inclined surface of the widened inclined guide part. It is regulated by contact, and it can be reliably prevented from coming off from the cable guide groove.

[0016] In addition, since the inclination guide portion of the straight portion region is configured such that the outward opening angle increases toward the terminal portion close to the socket portion,
When inserting the cable end into the socket during the sub-assembly of the brake cable, the inclined guide does not become a hindrance. Instead, the cable end is applied to the inclined guide to serve as a guide for insertion into the socket. Therefore, the workability of inserting the cable end into the socket can be improved.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a pedal unit fixed to a vehicle body side panel (not shown) via a bracket 2, and a right base plate 3 on which the bracket 2 is fixed.
A, a pedal lever 5 rotatably supported on a support shaft 4 fixed to the base plate 3A, and a left base plate 3B supporting the left side of the support shaft 4.

The pedal lever 5 is urged by a set spring (not shown) to return to the initial position. When the pedal lever 5 is depressed, the sector gear 6 provided on the outer periphery of the end on the pivotal support side is pressed. , Base plate 3
The stepping position of the pedal lever 5 is changed by changing the position of engagement with the lock pawl 7 which is pivotally supported by a set spring (not shown) and supported by a set spring (not shown) so as to be sandwiched between the A and 3B. That is, the parking position is locked.

A release lever 8 urged in one direction by a set spring 9 is pivotally supported on the base plate 3B in relation to the lock pawl 7, and a release cable 8a is connected to the spring of the set spring 9. By pulling against the force, the release lever 8 pushes one end of the lock pawl 7 in a direction in which the lock with the sector gear 6 is disengaged, thereby unlocking the pedal lever 5.

A guide plate 10 is fixedly mounted on the outer surface of the shaft support side end of the pedal lever 5 (the surface opposite to the base plate 3B). Brake cable 15 on the outer circumference
Are formed in the cable guide groove 11 for accommodating the same.

The cable guide groove 11 has an arcuate portion 11A formed in an arc around the pivot point of the pedal lever 5, and a straight portion 11B extending from the toe of the arcuate portion 11A in a substantially tangential direction. .

The guide plate 1 is provided on the pedal lever 5.
0, a rectangular cylindrical socket portion 13 is integrally formed substantially on the extension of the straight portion 11B.

At the end of the brake cable 15, a prismatic cable end 16 provided with an adjustment bolt 17 is fixed. The brake cable 15 is one end of a bendable outer tube 19 that covers the brake cable 15. 19a is engaged with the mounting hole 3D of the mounting portion 3C formed at the lower end of the base plate 3A.
P, and the brake cable 15 projecting from the end of the outer tube 19 is connected to the base plate 3A.
The cable end 16 is inserted around the cable guide groove 11 and accommodated in the cable guide groove 11 through the space between 3B. The sub-assembly 13 is sub-assembled to the pedal unit 1. The brake cable 15 itself is freely bendable, but the cable end 16 and the adjustment bolt 17 are usually made of a material that does not bend.

The socket portion 13 is provided at an appropriate opening angle θ ₁ outwardly with respect to the outer side surface of the pedal lever 5. After installing the brake cable 1 in the vehicle,
When adjusting the tension of 5, the adjusting operation can be easily performed using the tool TL even when the socket portion 13 is close to the side surface of the center instrument lower portion LW (see FIG. 3). .

The outer side wall of the cable guide groove 11, that is, the side wall constituted by the guide plate 10, has a region extending from the middle of the arcuate portion 11A to the straight portion 11B as shown in FIGS. , 3) (indicated by oblique lines).

In the inclined guide portion 20, the arc-shaped portion 11A has a gradually extending width and an outward opening angle which gradually increase as it reaches a portion connected to the straight portion 11B.
In is set to the required extension設幅L ₁ is formed to be inclined with a required opening angle outward. That is, the inclined guide portion 2
0 is formed so as to correspond to the inclination direction of the socket portion 13 (to be located substantially on an extension of the inclination direction).

The inclined guide portion 2 in the straight portion 11B
Opening angle and extending設幅L ₁ 0, the brake cable 15 as shown in FIG. 4 and 5 are arbitrarily set in consideration of the cable deflection width exits shake outward lifted slack in the cable guide grooves 11.

When the cable end 16 is inserted into the socket portion 13 between the side wall 12 outside the straight portion 11B and the socket portion 13, the cable end 16 and the side wall 1
The cable end relief portion 21 is provided at a required separation interval S that can avoid interference with the cable end 2.

In FIG. 1, reference numeral 30 denotes a parking switch provided on the base plate 3A, and a parking switch which is turned off by an arm piece 14 provided on the pedal lever 5 when the pedal lever 5 is returned to the initial position. RB indicates a rubber stopper that is mounted between the base plates 3A and 3B and that receives depression of the pedal lever 5.

According to the structure of the above-described embodiment, the pedal unit 1 sub-assembles the brake cable 15 to the pedal lever 5 as described above, and rotates the pedal lever 5 in the maximum stepping direction so that the brake cable 15 Is fixed to the cable guide groove 11 and transported to the vehicle body assembly line.

In this vehicle body assembly line, the pedal unit 1
Is attached to a vehicle-side panel such as a dash panel via a bracket 2. Thereafter, when laying a floor carpet or the like (not shown), the pedal lever 5 does not interfere with the laying operation. Is returned to the initial position by the release operation.

Even if the pedal lever 5 does not hinder the work of laying the floor carpet, the pedal lever 5 is once released to connect the brake cable 15 to an equalizer (not shown).

When the pedal lever 5 is thus released, the outer tube 19 is fixed to the mounting portion 3C. However, since the brake cable 15 has not yet been given a tensile force on the equalizer side (not shown), the brake cable Fifteen
Of the cable guide groove 11 is lifted from the position of the chain line in FIG. 4 to the position of the solid line in FIG. In the straight portion 11B, the degree of curvature of the brake cable 15 is large, so that the amount of lift is large. That is, since the brake cable 15 in the outer tube 19 is in contact with the inner peripheral surface of the outer tube 19 and is hard to move, the cable guide groove 11 without the outer tube 19 is used.
It sags in the orbital part.

As described above, when the brake cable 15 rises up from the cable guide groove 11, it tends to swing outward. This tendency is particularly large when the socket portion 13 is inclined outward as described above. .

Accordingly, when the brake cable 15 is connected to an equalizer (not shown) and tension is applied to the brake cable 15, the brake cable 15 moves right below the cable guide groove 11 at a position separated from the cable guide groove 11 shown by a solid line in FIG. As shown in FIG. 5, the brake cable 15 that has just moved downward is captured by the inclined guide portion 20 and returned to the cable guide groove 11 along the inclination, so that the brake cable 15 can be prevented from coming off.

In the above description, the prevention of the disconnection of the brake cable 15 when the pedal unit 1 is mounted on the vehicle is described. However, even if the brake cable 15 is extended and slackened with time, the same action is prevented. .

As described above, the disconnection of the brake cable 15 can be prevented by the inclined guide portion 20 extending to the side wall 12 of the cable guide groove 11, so that the conventional claw piece (for the purpose of preventing disconnection of the cable). (Which is provided near the parking switch 30 shown in FIG. 1) can be dispensed with. There is no danger of damage to the attached parts such as the parking switch 30 around the claw when hitting the claw, and it is also possible to eliminate the work of bending back and re-bending the claw when replacing the brake cable 15 and forgetting to re-bend. Thus, it is possible to improve the workability and the reliability.

In this embodiment, the cable end relief portion 21 is provided between the side wall 12 of the cable guide groove 11 and the socket portion 13 in the region of the straight portion 11B at a required separation S. When the sub-assembly of the brake cable 15 is performed, the brake cable 1
The cable end 16 is inserted into the socket portion 13 from the adjustment bolt 17 by rotating the cable end 5 around the cable guide groove 11. At this time, interference of the cable end 16 with the side wall 12 by the cable end escape portion 21 is avoided. Therefore, the insertion work can be performed smoothly, and the workability of the sub-assembly can be improved.

FIGS. 6 to 8 show a second embodiment of the present invention.

In this embodiment, the straight portion 1 of the side wall 12 of the cable guide groove 11 in the first embodiment is described.
1B region is formed up to a position close to the socket portion 13, and the entire height W including the inclined guide portion 20 of the side wall 12 in the straight portion 11 B is determined by the brake cable 15.
It is formed at a height higher than the lifting stroke due to slack.

The inclined guide portion 20 in the region of the straight portion 11B imparts a twist from a portion connected to the inclined guide portion 20 in the region of the arc-shaped portion 11A to reach the terminal portion close to the socket portion 13. The opening angle to the outside is increased in accordance with (1) and (2). Specifically, as shown in FIG. 9, the angle θ ₂ on the terminal portion side is larger than the angle θ ₃ near the boundary between the straight portion 11B and the arc portion 11A.

Therefore, according to the structure of the second embodiment, when the brake cable 15 rises due to the slack and swings outward in the vicinity of the socket portion 13, the brake cable 15 slides on the inclined surface of the widened inclined guide portion 20 and slides. The deflection to the outside is restricted, so that it is possible to reliably prevent the cable from coming out of the cable guide groove 11.

Further, since the angle of outward opening of the inclined guide portion 20 in the region of the straight portion 11B increases toward the terminal portion close to the socket portion 13, the brake cable 15 When the cable end 16 is inserted into the socket portion 13 during the sub-assembly, the inclined guide portion 20 does not interfere,
Rather, the cable end 16 can be brought into contact with the inclined guide portion 20 to serve as a guide for insertion into the socket portion 13,
The workability of inserting the cable end 16 into the socket 13 can be improved.

FIG. 10 is a view of the first embodiment viewed from the same direction as FIG. 9 of the second embodiment.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a side view of the guide plate in the embodiment.

FIG. 3 is a view taken in the direction of the arrow A in FIG. 2;

FIG. 4 is a diagram showing a floating state of a brake cable.
Sectional drawing corresponding to BB of FIG.

FIG. 5B is a diagram illustrating a state in which the brake cable is captured;
Sectional explanatory drawing equivalent to a B line.

FIG. 6 is a perspective view showing a second embodiment of the present invention.

FIG. 7 is a side view of the guide plate in the embodiment.

FIG. 8 is a view as viewed in the direction of the arrow A in FIG. 7;

FIG. 9 is a view on arrow B of FIG. 7 in the embodiment.

FIG. 10 is a diagram corresponding to FIG. 9 in the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pedal unit 3 Base plate 5 Pedal lever 11 Cable guide groove 11A Arc part 11B Straight part 12 Side wall 13 Socket part 15 Brake cable 16 Cable end 20 Inclined guide part 21 Cable end relief part

Claims (3)

[Claims] 1. A cable guide groove having an arc-shaped portion formed in an arc around a pivot point is provided on an outer periphery of an end on a pivot side of a pedal lever rotatably supported on one side surface of a base plate. A socket portion which is inclined outward at an appropriate opening angle from the toe portion of the arc-shaped portion toward the outside of the side surface of the pedal lever on a substantially tangential extension thereof is provided, and a brake cable is circulated and accommodated in the cable guide groove. The cable end is inserted and fitted into the socket portion and fixed, and the brake cable is pulled by operating the pedal lever to apply the parking brake, and the cable guide groove has an arc shape. A straight portion extending in a substantially tangential direction from a toe portion of the portion, and extending from the middle of the arc portion to the straight portion on the outer side wall of the cable guide groove. Therefore, in the arc-shaped portion, the extension width and the opening angle to the outside are gradually increased as it reaches the portion connected to the straight portion, and the straight portion is set to the required extension width and opened outward. A foot-operated parking brake device characterized by extending an inclined guide portion. 2. A cable end escape between a socket portion and an outer side wall of a straight portion at a required clearance which can avoid interference between the cable end and the side wall when the cable end is inserted into the socket portion. The foot-operated parking brake device according to claim 1, wherein a portion is provided. 3. An outer side wall of the straight portion is formed up to a position close to the socket portion, and a total height of the side wall including the inclined guide portion is formed at a height not less than a lift stroke due to slack of the brake cable, In addition, the inclination guide portion of the straight portion region is twisted from a portion continuously provided with the inclination guide portion of the arc portion portion, and the outward opening angle is increased toward the terminal portion close to the socket portion. The foot-operated parking brake device according to claim 1, wherein: