JP4034454B2 - Foot-operated parking brake device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stepping type parking brake device for an automobile.
[0002]
[Prior art]
In the foot-operated parking brake device, an arcuate cable guide groove is provided around the pivot point on the shaft support side end of the pedal lever that is pivotally supported on the base plate, and a brake cable is provided in the cable guide groove. The cable end is inserted and fitted into a socket provided on the extension of the cable guide groove in the substantially tangential direction, and the brake cable is pulled to operate the parking by pulling the brake cable. A brake is known.
[0003]
Further, a claw piece is erected on the outer side wall edge of the cable guide groove, and the claw piece is bent above the brake cable accommodated in the cable guide groove to prevent the cable from coming off.
[0004]
As described above, the claw pieces are bent and exist above the brake cable, so that the brake cable is slackened due to the elongation of the brake cable with time, or the brake cable is released from the cable guide groove. The cable is prevented from coming off from the cable guide groove due to the slack of the cable.
[0005]
That is, as described above, the pedal unit sub-assembles the brake cable to the pedal lever, rotates the pedal lever to the maximum stepping direction, fixes the brake cable in the cable guide groove, and conveys it to the vehicle body assembly line. The vehicle assembly line is assembled to the vehicle body, and after the pedal unit is assembled to the vehicle body, the pedal lever that has been depressed is released to the initial position when the floor carpet is laid. At this time, even if the brake cable is slack, the claw piece prevents the brake cable from being lifted and removed from the cable guide groove.
[0006]
[Problems to be solved by the invention]
The above-mentioned claw pieces are struck by a tool at the time of subassembly of the brake cable and bent upwardly in the cable guide groove, which not only increases the man-hours for sub-assembly work, but also closes the claw pieces during this tapping work. Attached parts such as a parking switch may be damaged.
[0007]
In addition, 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. There is a possibility of forgetting to turn the piece again to the position to prevent it from coming off.
[0008]
Therefore, the present invention provides a foot-operated parking brake device that can prevent the brake cable from being detached without using the above-described disengagement prevention claw piece, and can improve workability at the time of assembly or replacement of the brake cable. is there.
[0009]
[Means for Solving the Problems]
In the first aspect of the present invention , the guide plate is joined to the outer peripheral surface of the pedal lever on the outer periphery of the end of the pedal lever that is pivotally supported on one side surface of the base plate. A cable guide groove having an arcuate portion formed around the arcuate portion is provided, and at an appropriate opening angle outward from the side surface of the pedal lever on a substantially tangential extension from the toe end portion of the arcuate portion. An inclined socket part is provided, and the brake cable is wound around and accommodated in the cable guide groove, and the cable end is inserted and fitted into the socket part and fixed, and the brake cable is pulled by operating the pedal lever. A parking brake is provided, and the cable guide groove is provided with a straight portion extending in a substantially tangential direction from a toe end portion of the arc-shaped portion. The side walls constituted by the guide plates outside of the cable guide groove, across the straight portions from the middle of the arc-shaped portion, the arcuate portion of the progressively extending設幅outer accordance reaches the joint portion between the straight portions The opening angle is enlarged, and the inclined guide portion that is set to a required extending width at the straight portion and is opened outward is inclined.
[0010]
In the invention of claim 2, interference between the cable end and the side wall is caused between the outer side wall and the socket portion of the straight portion according to claim 1 when the cable end is inserted into the socket portion. A cable end relief portion is provided at a necessary separation interval that can be avoided.
[0011]
According to the invention of claim 3, the outer side wall of the straight part according to claim 1 is formed to a position close to the socket part, and the total height including the inclined guide part of the side wall is set to a slack of the brake cable. A terminal portion that is formed at a height equal to or higher than the lifting stroke due to and that is provided with a twist from the connecting portion with the inclined guide portion of the arc-shaped portion region in the straight portion region, and close to the socket portion The feature is that the opening angle to the outside is increased.
[0012]
【The invention's effect】
According to the first aspect of the present invention, when the brake cable sags at the circumferential portion of the cable guide groove when the pedal lever is released, the cable guide rises from the cable guide groove, and in particular, the cable guide close to the fixed portion between the socket portion and the cable end. In the straight part of the groove, the amount of the lift is large, but the outer side wall of the cable guide groove has an inclined required extending width having an opening angle to the outside in the region extending from the middle of the arc part to the straight part. Since the inclined guide portion is extended, when tension is applied to the brake cable that has once lifted from the cable guide groove, the brake cable is captured by the inclined guide portion and is moved along the inclination of the inclined guide portion into the cable guide groove. The brake cable can be prevented from coming off.
[0013]
In this way, the brake cable can be prevented from coming off at the inclined guide portion on the side wall of the cable guide groove, and the conventional claw piece can be eliminated, so that the claw piece can be removed when the brake cable is sub-assembled. The number of man-hours to bend and bend can be reduced, and there is no risk of damaging the attached parts around the nail piece when the nail piece is tapped, and the nail piece is bent back when the brake cable is replaced, Forgetting to re-bend can be eliminated, and workability can be remarkably improved.
[0014]
According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, when the brake cable is subassembled, the brake cable is wound around and accommodated in the cable guide groove, and the cable end is accommodated in the socket portion. The cable end relief part is provided between the straight part of the cable guide groove and the socket part at a required separation interval, and the cable end is inserted into the socket part of the cable end. Can be smoothly inserted and the workability of the sub-assembly can be improved.
[0015]
According to the third aspect of the present invention, in addition to the effect of the first aspect, the outer side wall of the straight portion of the cable guide groove is formed to a position close to the socket portion. The total height of the side wall of the ridge portion including the inclined guide portion is formed to be higher than the lifting stroke due to the slack of the brake cable, and the inclined guide portion in the straight portion region is used as the inclined guide portion in the arc-shaped portion region. Since the twist angle is given from the connecting part to the terminal part and the opening angle to the outside is increased as it reaches the terminal part close to the socket part, the outside of the cable guide is lifted from the cable guide groove due to the slack of the brake cable. The runout is regulated by slidingly contacting the inclined surface of the widened inclined guide portion, and it is possible to reliably prevent the runout from coming out of the cable guide groove.
[0016]
In addition, the opening angle of the inclined guide portion in the straight portion region increases outward as it reaches the terminal portion close to the socket portion, so that the cable end is connected to the socket portion when the brake cable is sub-assembled. When the cable is inserted into the socket, the inclined guide portion does not get in the way, but rather, the cable end can be applied to the inclined guide portion as a guideline for insertion into the socket portion. Insertion workability can be improved.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0018]
In FIG. 1, reference numeral 1 denotes a pedal unit which is fixed to a vehicle body side panel (not shown) via a bracket 2, and is rotated around a right base plate 3A fixed to the bracket 2 and a support shaft 4 fixed to the base plate 3A. A pedal lever 5 that is pivotally supported and a left base plate 3B that supports the left side of the pivot 4 are provided.
[0019]
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 of the shaft support side and the base plate 3A are provided. -The position where the pedal lever 5 is depressed by changing the meshing position with the lock pawl 7 which is pivotally supported so as to be sandwiched between 3B and is energized in the direction of meshing with the sector gear 6 by a set spring (not shown). That is, the parking position is locked.
[0020]
In association with the lock pawl 7, the base plate 3 </ b> B is pivotally supported by a release lever 8 that is biased in one direction by a set spring 9, and the release cable 8 a resists the spring force of the set spring 9. Then, by pulling, the release lever 8 pushes one end of the lock pawl 7 in a direction in which the engagement with the sector gear 6 is disengaged, so that the pedal lever 5 is unlocked.
[0021]
A guide plate 10 is fixed on the outer surface (the surface facing the base plate 3B) of the end portion of the pedal lever 5 on the shaft support side, and the guide plate 10 brakes the outer periphery of the end portion of the pedal lever 5. A cable guide groove 11 for accommodating the cable 15 is formed.
[0022]
The cable guide groove 11 includes an arcuate portion 11A formed in an arc around the shaft fulcrum of the pedal lever 5, and a straight portion 11B extending in a substantially tangential direction from the stop portion of the arcuate portion 11A.
[0023]
The pedal lever 5 is integrally formed with a rectangular tube-shaped socket portion 13 on the substantial extension of the straight portion 11B by the guide plate 10.
[0024]
A prismatic cable end 16 provided with an adjusting bolt 17 is fixed to the end of the brake cable 15, and the brake cable 15 has one end 19 a of a bendable outer tube 19 that covers the brake cable 15 as a base plate. After engaging with the mounting hole 3D of the mounting portion 3C formed at the lower end of 3A, the brake cable 15 is fixed by the clip CP and protrudes from the end of the outer tube 19 between the base plates 3A and 3B. 11, the cable end 16 is inserted and fitted into the socket portion 13, and the adjustment nut 18 is temporarily screwed into the adjustment bolt 17 to fix the cable end 16 to the socket portion 13. 1 is sub-assembled. Although the brake cable 15 itself can be bent, the cable end 16 and the adjusting bolt 17 are usually formed of a material that does not bend.
[0025]
The socket part 13 is inclined with an appropriate opening angle θ ₁ toward the outside with respect to the outer side surface of the pedal lever 5, and the pedal unit 1 is mounted on the vehicle by inclining the socket part 13 in this way. Thereafter, when adjusting the tension of the brake cable 15 by adjusting the screwing of the adjusting nut 18, the adjustment operation is performed using the tool TL even if the socket portion 13 is close to the side surface of the center instrument lower portion LW. It can be easily performed (see FIG. 3).
[0026]
Then, on the outer side wall of the cable guide groove 11, that is, the side wall 12 constituted by the guide plate 10, as shown in FIGS. 2 and 3, a region extending from the middle of the arcuate portion 11 A to the straight portion 11 B (FIGS. 2 and 3). The inclined guide portion 20 is extended in the shaded area.
[0027]
In the arcuate portion 11A, the inclined guide portion 20 gradually increases in the extending width and the outward opening angle as it reaches the connecting portion with the straight portion 11B, and the required extending width in the straight portion 11B. It is set to L ₁ and is inclined outward with a required opening angle. That is, the inclination guide part 20 is formed corresponding to the inclination direction of the socket part 13 (so as to be located on a substantially extended line in the inclination direction).
[0028]
As shown in FIGS. 4 and 5, the extension width L ₁ and the opening angle of the inclined guide portion 20 in the straight portion 11B are the cable runout width where the brake cable 15 sags in the cable guide groove 11 and floats outward. It is set arbitrarily in consideration.
[0029]
In addition, a space between the outer side wall 12 and the socket portion 13 of the straight portion 11B is required to avoid interference between the cable end 16 and the side wall 12 when the cable end 16 is inserted into the socket portion 13. Cable end escape portions 21 are provided at intervals S.
[0030]
In FIG. 1, reference numeral 30 is provided on the base plate 3A. When the pedal lever 5 is returned to the initial position, the parking switch is turned off by the arm piece 14 provided on the pedal lever 5, and RB is the base plate. A rubber stopper that is mounted between 3A and 3B and receives the depression of the pedal lever 5 is shown.
[0031]
According to the structure of the above 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 stepping direction to the maximum to guide the brake cable 15 to the cable guide. It is fixed to the groove 11 and conveyed to the vehicle body assembly line.
[0032]
In this vehicle assembly line, the pedal unit 1 is attached to a vehicle body side panel such as a dash panel via a bracket 2, and then the pedal lever 5 does not interfere with the laying work when laying a floor carpet or the like not shown in the figure. The pedal lever 5 is returned to the initial position by the release operation of the release lever 8.
[0033]
Even when the pedal lever 5 does not get in the way of laying the floor carpet, the pedal lever 5 is once released in order to connect the brake cable 15 to an ecolyzer not shown.
[0034]
When the pedal lever 5 is released in this way, the outer tube 19 is fixed to the mounting portion 3C. However, the brake cable 15 is not attached to the brake cable 15 because the tensile force on the ecolyzer side (not shown) is not yet applied. The cable guide groove 11 sags around the circumference of the guide groove 11 and rises from the cable guide groove 11 to the chain line position indicated by the arrow in FIG. 4, and in particular, the straight shape of the cable guide groove 11 near the fixed portion between the socket portion 13 and the cable end 16. In part 11B, the degree of bending of brake cable 15 is large, and this amount of lift increases. In other words, the brake cable 15 in the outer tube 19 also comes into contact with the inner peripheral surface of the outer tube 19, so that the brake cable 15 sags at the rotating portion of the cable guide groove 11 without the outer tube 19 because it is difficult to move.
[0035]
As described above, when the brake cable 15 is lifted from the cable guide groove 11, the brake cable 15 tends to swing outward. In particular, when the socket portion 13 is inclined toward the outside as described above, this tendency increases.
[0036]
Therefore, when the brake cable 15 is connected to an equalizer not shown in the drawing and a tension is applied to the brake cable 15, the brake cable 15 moves in a direction immediately below the cable guide groove 11 shown in FIG. As shown in FIG. 5, the moved brake cable 15 is captured by the inclined guide portion 20 and returned to the cable guide groove 11 along the inclination, thereby preventing the brake cable 15 from coming off.
[0037]
In the above description, the brake cable 15 is prevented from coming off when the pedal unit 1 is mounted on the vehicle. However, even when the brake cable 15 is stretched and slacks over time, the same action prevents the brake cable 15 from coming off.
[0038]
As described above, since the brake cable 15 can be prevented from coming off by the inclined guide portion 20 extending on the side wall 12 of the cable guide groove 11, a conventional claw piece (for the purpose of preventing the cable coming off is shown in FIG. (Provided near the parking switch 30 shown in the figure) can be made unnecessary, and therefore, the man-hours to bend and deform the claws when the brake cable 15 is sub-assembled can be reduced, and when the claws are beaten. There is no risk of damaging attached parts such as the parking switch 30 around the claw piece, and it is possible to eliminate the work of bending back and rebending the claw piece when the brake cable 15 is replaced and forgetting to rebend. Improvement in reliability and improvement in reliability can be realized.
[0039]
In the present embodiment, since the cable end relief portion 21 is provided at a required separation interval S between the side wall 12 of the cable guide groove 11 and the socket portion 13 in the region of the straight portion 11B, the brake During the subassembly operation of the cable 15, the brake cable 15 is made to circulate in the cable guide groove 11 and the cable end 16 is inserted into the socket portion 13 from the adjustment bolt 17. At this time, the cable end 16 is moved by the cable end relief portion 21. Since interference with the side wall 12 is avoided, the insertion operation can be performed smoothly and the workability of the subassembly can be improved.
[0040]
6 to 8 show a second embodiment of the present invention.
[0041]
In this embodiment, the portion of the straight portion 11B region of the side wall 12 of the cable guide groove 11 in the first embodiment is formed to a position close to the socket portion 13, and the straight portion 11B The overall height W including the inclined guide portion 20 of the side wall 12 is formed to be higher than the lifting stroke caused by the slack of the brake cable 15.
[0042]
Further, 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, and goes outward as it reaches the terminal portion close to the socket portion 13. The opening angle is increased (shaded area in FIGS. 7 and 8). 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-shaped portion 11A.
[0043]
Therefore, according to the structure of the second embodiment, when the brake cable 15 floats due to slack and swings outward in the vicinity of the socket portion 13, it slides into contact with the inclined surface of the widened inclined guide portion 20 to the outside. It is possible to reliably prevent the deflection from coming out of the cable guide groove 11.
[0044]
In addition, the angle of the outward opening of the inclined guide portion 20 in the straight portion 11B region increases toward the terminal portion close to the socket portion 13 in this way, so that the brake cable 15 can be subassembled. When the cable end 16 is inserted into the socket portion 13, the inclined guide portion 20 does not get in the way. Rather, the cable end 16 is brought into contact with the inclined guide portion 20 as a guide for insertion into the socket portion 13. Thus, the workability of inserting the cable end 16 into the socket portion 13 can be improved.
[0045]
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 a guide plate in the same embodiment.
FIG. 3 is a view taken along arrow A in FIG. 2;
4 is a cross-sectional explanatory view corresponding to BB in FIG. 2 showing a lifted state of a brake cable.
FIG. 5 is a cross-sectional explanatory view corresponding to the line BB in FIG. 2 showing a captured state of the brake cable.
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 same embodiment.
8 is a view taken in the direction of arrow A in FIG. 7;
9 is a view taken in the direction of arrow B in FIG. 7 according to the embodiment.
FIG. 10 is a view 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-shaped part 11B Straight part 12 Side wall 13 Socket part 15 Brake cable 16 Cable end 20 Inclination guide part 21 Cable end relief part

Claims (3)

A guide plate is joined to the outer peripheral surface of the pedal lever on the outer periphery of the pedal lever that is pivotally supported on one side surface of the base plate, and an arc-shaped portion formed in an arc around the shaft fulcrum is formed. A cable guide groove having a socket portion inclined at an appropriate opening angle outwardly with respect to a side surface of the pedal lever on a substantially tangential extension from a toe end portion of the arc-shaped portion. The brake cable is wrapped around and accommodated in the groove, and the cable end is inserted and fitted into the socket part and fixed, and the brake cable is pulled to apply the parking brake by stepping on the pedal lever. The cable guide groove is provided with a straight portion extending in a substantially tangential direction from a toe portion of the arc-shaped portion, Wherein the side walls constituting the guide plate, across the straight portions from the middle of the arc-shaped portion, gradually expanded and the opening angle of the extending設幅outer accordance reaches the joint portion between the straight portions is arcuate portion, In addition, a foot-operated parking brake device characterized in that an inclined guide portion that is set to a required extending width in a straight portion and is opened outward and inclined is extended. A cable end relief portion is provided between the side wall on the outside of the straight portion and the socket portion at a required separation interval that 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. The outer side wall of the straight part is formed to a position close to the socket part, and the total height including the inclined guide part of the side wall is formed to be higher than the lifting stroke due to the slack of the brake cable, and the straight shape The inclined guide part of the partial area is given a twist from the connecting part with the inclined guide part of the arc-shaped part area, and the outward opening angle is increased as it reaches the terminal part close to the socket part. The foot-operated parking brake device according to claim 1.

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