JP2511586Y2 - Parking brake cable adjuster - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cable adjusting device for a parking brake.

(Prior Art) Recently, a lot of vehicles using a foot-operated operation pedal for a parking brake of an automobile have come to be seen.

The foot-operated parking brake is, for example, as shown in FIG. 10, first of all, a foot-operated operation pedal 2 pivotally supported around a fulcrum 1 in a direction of an arrow, and a coaxial end of the operation pedal 2. Lever member 3 fixed in this state, a hook 4 provided at the tip of the lever member 3, an adjusting mechanism 5 provided at the rear end side of the lever member 3, and an end 6c of the hook 4 is engaged. The push-pull cable 6 and the cable mounting bracket 40 that supports the push-pull cable 6 with respect to the vehicle body are provided, and the operation pedal 2 is depressed by a predetermined angle in the arrow (a) direction. Then, in response to this, the lever member 3 rotates in the arrow (B) direction to rotate the push-pull cable 6
In the direction of the arrow (C). As a result, a brake unit (not shown) is activated to apply the parking brake.

In this case, the actual pulling stroke L corresponding to the engagement state (tension) of the push-pull cable 6 with the hook 4 of the operation pedal 2 and the depression angle θ is provided on the rear end side of the lever member 3. It is adjusted to an appropriate state by the adjusting mechanism 5 provided.

The adjusting mechanism 5 has a stopper piece 5a attached to the operation pedal 2 side as shown in the figure, and one end side 9a inserted into a rod through hole (free fitting hole) 8 of the stopper piece 5a, while the other end The side 9b is provided with an adjusting rod 9 connected to the rear end of the lever member 3 via a hinge 100. A thread groove 9c is formed in the insertion portion of the adjustment rod 9 into the rod insertion hole 8 over a predetermined axial length, and the outside of the stopper piece 5a is formed by using the thread groove 9c. An adjustment nut 120 for adjusting the stroke amount is screwed so as to be rotatable at a position on the tip side of the thread groove 9c).

Therefore, when the adjust nut 120 is rotated, the distance between the hook portion 4 and the cable mounting bracket 40, in other words, the hook-side protruding length of the inner cable 6a with respect to the outer cable 6b of the push-pull cable 6 is appropriately adjusted. Can be adjusted to.

(Problems to be solved by the invention) However, the cable adjusting device for the parking brake having the above structure has the following problems.

(1) The push-pull cable 6 and the operation pedal 2 are connected via an intermediate lever 3 which is a plate member, and moreover, a shaft play is further provided between the intermediate lever 3 and the operation pedal 2 side. Since the adjusting mechanism 5 having the fitting portion is interposed, noise due to vibration is easily generated, and since the number of parts is large, the manufacturing cost is high and the assembling work is complicated.

(2) When adjustment adjustment is performed, the lever member 3 rotates in an arc shape, and the crossing angle with the operation pedal 2 also changes.
Since the angle of extension of the inner cable 6a connecting the hook member 4 and the end of the outer cable 6b changes and the lever ratio itself changes substantially, it also affects the braking force itself. Also, the inner cable of push-pull cable 6
6a causes a case of being bent and pulled out from the mounting bracket 40 portion, which easily causes fatigue due to sliding at the bent portion and deteriorates the operation feeling.

(Means for Solving the Problem) The present invention has been made for the purpose of solving the above problems, and an operation pedal that is rotated at a predetermined angle with a support shaft fixed to the vehicle body as a fulcrum. A parking brake comprising: a brake actuation cable that is connected to a rotating end side of the operation pedal and is pushed / pulled; and a cable adjusting unit that adjusts a pulling stroke of the brake actuation cable. The means is provided between the rotation end side of the operation pedal and the brake operation cable operation end side, and is adjustably connected to the rotation end side of the operation pedal via a connecting shaft so as to be relatively rotatable. A rod, a guide member fitted to the adjust rod so as to be movable in the axial direction, and a lock member for locking the axial position of the guide member at a desired position. The operating end of the brake actuation cable is connected to the guide member.

(Operation) In the configuration of the parking brake cable adjusting device of the present invention, first, the cable adjusting means is provided directly between the rotating end side of the operation pedal and the brake operating cable.
The turning end of the operation pedal and the brake operating cable are connected via the cable adjusting means itself.

Therefore, the conventional plate-shaped connecting parts such as the intermediate lever are not required, the noise due to vibration is reduced, the number of components is also decreased, the assembling work is facilitated, and the cost is reduced. it can.

Moreover, the cable adjusting means includes an adjusting rod rotatably connected to the rotating end side of the operation pedal via a connecting shaft, and a guide member fitted to the adjusting rod so as to be axially movable. And a lock member that locks the axial position of the guide member at a desired position, and the operating end of the brake actuating cable is connected to the guide member. Also, the guide member is maintained in a free axial state with respect to the rotation of the operation pedal, and even if the guide member is moved in the axial direction to adjust the brake operating cable, the lever ratio is not changed. , You can adjust the cable stroke. Moreover, as a result, the bending of the brake actuating cable is not caused, and the smooth operating state of the brake actuating cable can be ensured. Also, the durability is improved.

(Effects of the Invention) Therefore, according to the parking brake cable adjusting device of the present invention, it is possible to reduce the number of parts and improve the space factor, so that the overall size of the device can be reduced and the price can be reduced. By reducing the noise, it becomes possible to contribute to the improvement of quietness in the vehicle interior.

Moreover, since there is no change in the lever ratio due to the adjustment of the cable stroke, there is no need to worry about changes in the braking force as in the past, and there is no bending at the inner cable extension, so stable operation is always ensured and long-term use. It is possible to provide a highly reliable parking brake capable of withstanding.

(Embodiment) (1) First Embodiment FIGS. 1 to 3 show the structure of a cable adjusting device for a foot-operated parking brake according to a first embodiment of the present invention.

First, in FIG. 3, reference numeral 10 is a foot-operated operation pedal for a parking brake, and the operation pedal 10 is rotatably attached to the vehicle body via a support shaft 12 fixed to the vehicle body side. A proximal end side of an adjusting rod 15 of a cable adjuster 14, which will be described later, is axially rotatably attached to the distal end 10a of the rotating side via a connecting shaft 13, while the other end 10b of the operating side is relatively rotatable. A foot portion 11 is provided on the side.

As shown in FIG. 2 and FIG. 3, the cable adjuster 14 has the adjusting rod 15 and a guide hole 18a inside, and is fitted in the middle of the adjusting rod 15 through the guide hole 18a. A guide member 18 that is slidably fitted in the guide tube 30 that is fixedly fitted together, a hook portion 16 formed on a side portion of the guide member 18, and a hook portion 16 formed at the center of the hook portion 16. Engaging hole 16a of the cable end 22
And the position (stop position) of the guide member 18 on the adjust rod is arbitrarily restricted by being screwed into the thread groove 15a on the tip side of the adjust rod 15 and contacting the end surface portion 19 of the guide member 18. Adjust nut 20 (which constitutes the lock member in the claims), and
A rigid reinforcing lever 17 is fixed to one end of the guide member 18 by welding, stands upright along the adjusting rod 15, and has an upper end portion abutted on the connecting shaft 13 with a rigid reinforcing lever 17.

The engaging end 22 of the inner cable 21 of the push-pull cable is engaged with the cable end engaging hole 16a of the hook portion 16 of the adjuster 14, as shown in the drawing. The push / pull cable for the parking brake is the outer cable 24 and the outer cable as in the past.
The inner cable 21 is housed in the cable 24, and the end 24a of the outer cable 24 is connected to the cable mounting bracket 23.
It is supported by being fixed to the vehicle body via. Reference numeral 50 is an auxiliary plate that is spaced apart from the operation pedal 10 by a predetermined distance and supports the connecting shaft 13 therebetween.

In the above configuration, when the operation pedal 10 is stepped on as shown by an arrow (a) in FIG. 3, the rotation-side end portion 10a of the operation pedal 10 rotates in the arrow (b) direction in response thereto. .

As a result, the adjust rod 15 is pulled in the arrow (c) direction, and the inner cable 21 is also pulled in the arrow (d) direction via the hook portion 16. As a result, the parking brake is activated.

By the way, the adjust rod 15 is pulled in the direction of the arrow (c) via the connecting shaft 13 in accordance with the rotation of the operation pedal 10 as described above, but in that case, the adjust rod 15 is necessarily orthogonal to a certain degree. Receives bending stress in the direction (arrow E).
Therefore, as a countermeasure against this, the reinforcing lever 17 is provided as described above, and the reinforcing lever 17 receives the stress and assists the rigidity of the adjusting rod 15.

Then, in the above configuration, the inner cable 21
When adjusting the cable length (tension) by initially engaging the locking end 22 of the device at the time of completion of assembly of the device, or to adjust the cable length in order to remove the slack of the cable due to long-term use. In such cases, make the following adjustments.

That is, first, the engaging end portion 22 of the inner cable 21 is connected to the cable end engaging hole 16 of the hook portion 16 of the guide member 18.
Engage in a.

Then, in this state, the adjusting nut 20 on the adjusting rod 15 is arbitrarily rotated counterclockwise or clockwise in accordance with the looseness of the inner cable 21 at that time, and the hook portion 16 is integrated. By moving the guide member 18 in the axial direction of the adjusting rod 15 by an arbitrary distance, an optimum inner cable protrusion length from the end portion 24a of the outer cable 24 is set, and the adjusting nut 20 is fixed at the position. .

As a result, the inner cable 21 is replaced with the outer cable 24.
Also, the relationship between the position of the mounting bracket 23 and the setting position of the operation pedal 10 is adjusted to an optimum state. In this case, the adjusting mechanism is located between the operation pedal side connecting shaft 13 and the inner cable 21 to be connected, and simply pulls or returns the inner cable 21 side without changing the set angle of the operation pedal 10. Since the engagement state between the hook portion 16 and the operation pedal 10 side is properly adjusted only by
No change in lever ratio occurs.

Moreover, according to the structure of the embodiment, since the hook portion and the adjusting mechanism of the cable are integrally formed, the number of parts is smaller than that of the conventional one, and the man-hours for assembling can be reduced. , The cost will be cheap.

Further, since there is no overlapping portion in the shape of the plate member, chattering noise due to vibration or the like is less likely to occur.

Moreover, in the above case, the means for adjusting the cable stroke includes the adjusting rod 15 rotatably supported on the rotating end side of the operating pedal 10 via the connecting shaft 13 so as to be relatively rotatable.
The inner cable 21 includes a guide member 18 fitted to the adjust rod 15 so as to be movable in the axial direction, and an adjust nut 20 for locking the axial position of the guide member 18 at a desired position. Since the operation end of the control rod is connected to the guide member 18, the adjustment rod 15 and the guide member 18 are connected to the operation pedal.
The inner cable 21 is maintained in the axial direction free from the rotation of 10 by moving the guide member 18 in the axial direction.
Even if the adjustment adjustment is performed, the cable stroke can be adjusted without changing the lever ratio. Further, as a result, the inner cable 21 is not bent, and a smooth operating state of the brake operating cable can be ensured. Also, the durability is improved.

Therefore, according to the parking brake cable adjusting apparatus of the present embodiment, the reduction of the number of parts and the improvement of the space factor make it possible to realize a compact size and a low price of the entire apparatus, and reduce the vibration generating parts. As a result, it is possible to contribute to the improvement of quietness in the vehicle interior.

Moreover, since there is no change in the lever ratio due to the adjustment of the cable stroke, there is no need to worry about changes in the braking force as in the past, and there is no bending at the inner cable extension, so stable operation is always ensured and long-term use. It is possible to provide a highly reliable parking brake capable of withstanding.

(2) Second Embodiment Next, FIGS. 4 and 5 show the structure of a cable adjusting device for a foot-operated parking brake according to a second embodiment of the present invention.

In the configuration of the embodiment, the guide member 18 is formed by a U-shaped body having a long section in the axial direction of the adjust rod 15, and the upper pedal side side pieces 18a, 18a are provided with the operating pedal 10 side adjust rod connecting shaft 13. Is formed by forming elongated holes 25, 25 which are long in the up-down direction and which engage with the left and right shaft ends.

The lengths of the elongated holes 25, 25 in the vertical direction are, of course, the length of the screw groove portion 15a of the adjust rod 15, that is, a sufficient length corresponding to the adjust stroke of the inner cable. The upper portion (both sides 18a, 18a) of the guide member 18 having the holes 25, 25 functions as the rigidity reinforcing lever member 17 in the case of the first embodiment. The other structure is substantially the same as that of the first embodiment.

In the case of the configuration of this embodiment, the degree of integration of the hook portion 16, the guide member 18, the rigidity reinforcing lever portion, etc. is higher than that of the configuration of the first embodiment, and vibration is less likely to occur. . Especially, the lever member part for rigidity reinforcement is a long hole 2
Since the adjusting rod connecting shaft 13 itself is completely engaged from the periphery by the two side pieces 18a, 18a engaging on both sides via 5,25, the effect of increasing the rigidity is high.
Also, rattling is unlikely to occur.

(3) Third Embodiment Next, FIGS. 6 to 9 show the construction of a cable adjusting device for a foot-operated parking brake according to a third embodiment of the present invention.

In the case of the cable adjusting devices of the above-described first and second embodiments, the reinforcing lever member 17 and the guide member 18 which are the rigidity reinforcing portion on the hook portion side during the operation of the parking brake are both the adjusting ends of the adjusting rod 15. (Screw part 15
The length from the a-side tip) to the vicinity of the connecting shaft 13 is a considerably long member. Therefore, for example, if the distance between the position of the adjusting nut 20 and the connecting shaft 13 is shortened by taking a large amount of adjustment, for example, the long reinforcing lever member 17
Also, in the case of a vehicle in which the tip of the guide member 18 is largely projected upward, and the equipment around the installation portion is congested, interference with them can be considered.

Therefore, in this embodiment, in order to solve the above-mentioned drawbacks, as shown in FIG. 6 to FIG.
15 'itself has a square cross section with a large diameter,
This is characterized in that the reinforcing lever member 17 and the guide member 18 as described above are unnecessary by sufficiently enhancing the rigidity.

Then, the main body portion 15 of the prismatic adjustment rod 15 '
The hook portion 16 and the guide portion 50 are slidably inserted into b'and slidably fitted to each other, and then the adjust rod 1
An adjustment nut 20 rotatably screwed to the side of the screw groove portion 15a 'of the 5'is locked so as not to come off the shaft.

The guide portion 53 has a U-shaped cross section, and is an adjustment rod from the rod rear side (right side in FIG. 6) opposite to the hook portion 16.
It is fitted to the rectangular main body 15b 'of 15' so as to be slidable in the axial direction, and in the fitted state, as shown in FIGS. 6 and 7, the front side (left side in FIG. 6). )
The hook portion 16 provided with a fitting portion having a U-shaped cross section is externally fitted,
The outer fitting portion is integrally formed by welding. The length of the guide portion 53 is the same as the adjusting rod 15 '.
It is said to be about 1/2 the length of.

In the figure, reference numeral 53 is a slide piece having a U-shaped cross section that is fitted and welded into the opening side of the guide portion 53 to be integrated with the guide portion 53. It comes into contact with the front surface of the above and slides in the vertical direction, and fulfills the function of retaining and maintaining the fitted state of the guide portion 53.

On the other hand, reference numerals 51 and 52 in FIGS. 8 and 9 indicate that when the guide portion 53 slides, the guide portion 53 causes the operation pedal 10 to move.
Alternatively, it is a spacer fitted to the connecting shaft 13 so as not to interfere with the auxiliary plate 50 and the like. Also in this case, the structure of the hook portion 16 is almost the same as that of each of the above-described embodiments.

According to the structure of this embodiment, since the length of the guide portion 53 is short, which is about half the length of the adjusting rod 15 ', the guide portion 53 may protrude excessively in the connecting axial direction even when the maximum stroke is taken. Without spacers as described above
Since 51 and 52 are also provided, the fear of interfering with the surrounding structures is surely eliminated.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of a main part of a cable adjusting device for a foot-operated parking brake according to a first embodiment of the present invention, FIG. 2 is a bottom view of the same, and FIG. FIG. 4 is a side view in an assembled state, FIG. 4 is a side view of a main part of a cable adjusting device for a foot-operated parking brake according to a second embodiment of the present invention, and FIG. 5 is a side view in a using state of the device. FIG. 6 and FIG. 6 are side views showing the structure of the main part of the cable adjusting device for a foot-operated parking brake according to the third embodiment of the present invention, and FIG. 7 is a bottom view of the main part of the same device. Figure 8 shows
FIG. 9 is a rear view of the main part of the device, FIG. 9 is a sectional view of the main part of the device, and FIG. 10 is a side view of a conventional cable adjusting device for a parking brake. 10 …… Operating pedal 12 …… Spindle 13 …… Coupling shaft 14 …… Adjuster 15,15 ′ …… Adjust rod 15a, 15a ′ …… Screw groove 16 …… Hook part 18 …… Guide member 18a …… Guide member Side piece 20 …… Adjust nut 21 …… Inner cable 23 …… Cable mounting bracket 24 …… Outer cable 25 …… Oval hole

Claims (1)

(57) [Scope of utility model registration request] 1. An operation pedal which is pivotally operated at a predetermined angle with a support shaft fixed to the vehicle body as a fulcrum, and a brake actuation cable which is connected to a pivot end side of the operation pedal and is push-pull operated. And a cable adjusting means for adjusting the pulling stroke of the brake operating cable, the cable adjusting means is provided between the rotating end side of the operation pedal and the brake operating cable operating end side. An adjusting rod that is provided and is rotatably connected to the rotating end side of the operation pedal via a connecting shaft, a guide member that is axially movably fitted to the adjusting rod, and the guide member. A lock member that locks the axial position of the brake actuator at a desired position, and the operation end of the brake actuating cable is connected to the guide member. Cable adjustment device of the parking brake.