JPH0219853Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to an improvement of a cable type operating device.

Prior Art A flexible outer casing and an inner cable longitudinally disposed within the outer casing so as to be movable in the axial direction, and by moving the inner cable relative to the outer casing in the axial direction. 2. Description of the Related Art A cable type operating device is known that rotates a rotating member connected to an inner cable.

In such a cable operating device, usually
The outer casing is in a curved state, and one end of the outer casing is attached to the member to which the rotating member is attached.
The other end portions are fixedly provided to other members, and an inner cable protruding from one end of the outer casing is connected to a portion spaced a predetermined distance from the center of rotation of the rotary member. When an operating force is applied to the inner cable in the retracting direction, the rotating member is rotated while the outer casing receives the reaction force, and along with this, the rotating member that is integrally fixed to the rotating member is rotated. Depending on the distance between the part where the inner cable is attached to the shaft and the center of rotation, a predetermined amount of rotational force can be obtained, or the inner cable can be rotated in a different direction from the part to which it is connected. A predetermined amount of acting force is obtained at a portion spaced apart from the center by a predetermined distance, depending on the lever ratio, etc.

Problems to be Solved by the Invention However, in such a cable-type operating device, if it is necessary to secure a larger rotational force or acting force, the center of rotation of the rotation member and the part where the inner cable is connected should be It was unavoidable that the distance between the inner cables (rotating radius) and the operating stroke of the inner cable would increase.

On the other hand, as shown in FIG. 4 of JP-A No. 54-12074, for example, one end of one of a pair of levers that are pivotally connected by a common pin to form a scissors shape. If the end of the inner cable is connected to the end of the inner cable, and the end of the outer casing is connected to the end of the other lever that is opposite to the end of the lever, by pulling in the inner cable, one lever can be moved. is rotated in the acting direction, and the other lever is also rotated in the acting direction due to the reaction force generated in the outer casing, so the distance between one end of the one lever to which the inner cable is connected and the pin is It is thought that the operating force of the lever can be obtained appropriately even if the operation stroke of the inner cable is relatively small.
In this case, it is difficult to avoid that the acting direction of the reaction force of the outer casing against one end of the other lever is relatively largely inclined with respect to the longitudinal direction of the other lever, so there is a loss in the reaction force of the outer casing. becomes large, making it difficult to obtain sufficient rotational force in the operating direction of the other lever.

In addition, the rotating shaft of the rotating member that is rotated by the inner cable is integrally provided with the rotating member, and the operating force of the inner cable is converted into the rotational force of the rotating shaft of the rotating member. When a cable-operated operating device is used, in order to increase the rotational force of the rotating shaft, a pair of scissor-shaped levers are provided on the rotating shaft as described above, and the pair of levers are arranged in opposite directions. It is not possible to adopt a configuration in which the inner cable and the outer casing are connected to one end of the cable.

Means for Solving the Problems The present invention was made against the background of the above circumstances, and its purpose is to transfer the operating force of the inner cable to a rotating member that is rotated by the inner cable. In a cable-type operating device used to convert the rotational force of an integrally provided rotational shaft into rotational force, the purpose is to appropriately utilize the reaction force of the outer casing to ensure even greater rotational force of the rotational shaft. . In order to achieve such an object, the gist of the present invention is to provide a flexible outer casing and an inner cable longitudinally disposed within the outer casing so as to be movable in the axial direction. by moving the rotating member connected to the inner cable relative to the outer casing in the axial direction,
In a cable type operating device used for converting an operating force applied to the inner cable into a rotational force of rotation provided integrally with the rotation member, the rotation axis of the rotation member is A connecting member is provided which connects the end of the outer casing and a portion opposite to the side to which the inner cable is connected at a fixed relative distance in a state substantially perpendicular to the rotating member.

By doing this, in the above-mentioned cable type operating device, the portion of the rotating member on the opposite side to the inner cable side with respect to the rotating shaft and the end of the outer casing can be connected by the connecting member. Since they are connected at a fixed relative distance, when the inner cable is pulled in, the rotating member is rotated in the acting direction by the inner cable, and the reaction force generated in the outer casing as the inner cable is pulled in is connected. The reaction force is transmitted to the rotating member through the member, and the rotating member is also rotated in the acting direction, so two locations located on opposite sides of the rotating member's rotation axis are used. The rotating member is rotated while a force acting as a substantially couple is applied to the rotating member. Thereby, even if the rotation radius of the rotation member, the operating stroke of the inner cable, etc. are reduced, a large rotational force of the rotation shaft can be ensured.

Moreover, since the connecting member and the rotating member form a substantially right angle, there is less loss of reaction force transmitted from the outer casing to the rotating member, which can contribute more favorably to increasing the rotational force of the rotating shaft. .

Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

FIG. 1 is a schematic diagram showing an example of a cable type operating device of the present invention used as a device for transmitting parking brake operating force to a disc brake with a parking brake. In the figure, a caliper 12 straddles the disk rotor 10 in its thickness direction, and a torque plate fixed to a non-rotating member (not shown) is attached to the outer periphery of a disk rotor 10 that is rotatably provided together with wheels, etc. It is supported in a floating manner by a pair of slide pins (not shown) protruding from 14. Calipa 1
Reference numeral 2 denotes a cylinder portion 16, a connecting portion 18 that extends from one end of the cylinder portion 16 located on the outer peripheral side of the disk rotor 10 in a direction parallel to its axis, and a tip end of the connecting portion 18. The disc rotor 10 is provided with a claw portion 20 extending radially inward of the disk rotor 10 in a direction substantially perpendicular to the axis of the cylinder portion 16 . A piston 22 is slidably fitted inside the cylinder portion 16 .
A pair of pads 24 and 26 are disposed between the piston 22 and the claw portion 20 with the disc rotor 10 sandwiched between them, and one pad 24 is located on the torque plate 14 so that the axis of the piston 22 is The other pad 26 is supported movably in the axial direction of the piston 22 by the claw portion 20.

As shown in FIG. 2, a protrusion 29 having a female threaded hole 28 is integrally formed in the center of the top wall 27 of the piston 22 in the axial direction. It is slidably fitted into a through hole 33 formed in the wall 31 in the axial direction of the cylinder portion 16 . An adjustment bolt 37 having an adjustment wheel 35 on its head is screwed into the female threaded hole 28 of the protrusion 29 so as to be relatively rotatable, and the head side of the adjustment bolt 37 projects from the bottom wall 31 by a predetermined distance.

As shown in FIGS. 1 and 2, a pair of support portions 30 (the other not shown) are provided on the bottom wall 31 of the cylinder portion 16 to protrude in a direction parallel to the axis of the cylinder portion 16. A rotation shaft 32 is rotatably supported by the pair of support portions 30 via a bush, a needle bearing, etc. (not shown).
A cam groove 39 is formed approximately at the center in the longitudinal direction of the rotation shaft 32, and the cam groove 39 and the adjustment bolt 3
A rod-shaped toggle 41 is interposed between the center part of the top end surface of the head 7. Further, a parking brake lever 34 having a longitudinal plate shape is integrally fixed to one end of the rotation shaft 32 at its intermediate portion, and the intermediate portion is attached in a direction substantially perpendicular to the longitudinal direction of the parking brake lever 34. a protrusion 3 that projects a predetermined distance in a direction perpendicular to the rotation axis 32;
6 is formed. In this embodiment, the parking brake lever 34 functions as a rotating member. Moreover, one support part 30 and the toggle 41
An adjustment member 43 having a generally disc-like shape as a whole is provided integrally with the rotation shaft 32 between the adjustment member 43 and the adjusting member 43 , and a part of the adjustment member 43 is attached in a state where it is engaged with the adjustment wheel 35 .

When operating the parking brake of such a disc brake with a parking brake, when the parking brake lever 34 is rotated clockwise in FIG. 41 is pushed out in the direction approaching the pad 24 (to the right in FIG. 2), and the thrust is transmitted to the protrusion 29 via the adjustment bolt 37, and the piston 22 is pushed out.
As a result, one pad 24 is pressed against one surface of the disc rotor 10, and the caliper 12 is relatively moved in the direction opposite to the piston 22 by the reaction force, and the other pad 26 is pushed against the disc rotor 10 by the claw portion 20. The disk rotor 10 is pressed against the other surface of the pair of pads 24, 2.
6, it is compressed with a predetermined pressing force and its rotation is suppressed. Note that when the pads 24 and 26 are worn and the amount of rotation of the parking brake lever 34 exceeds a predetermined amount of rotation, the adjustment bolt 3
7, adjustment wheel 35, and adjustment member 4
The amount of rotation of the parking brake lever 34 is automatically adjusted based on the operation of the parking brake lever 34, but a detailed explanation will be omitted as it is not directly necessary for understanding the present invention. .

At both ends of the parking brake lever 34,
Outer casing 38 and inner cable 40
are each connected. Outer casing 3
8 is made of a flexible and non-compressible member, and is partially clamped and curved in the vehicle body 46.
In addition, in FIG. 1, in order to facilitate understanding, the bending directions of the outer casing 38 and the inner cable 40 are shown rotated by a predetermined angle. The inner cable 40 is connected to the outer casing 38
One end of the inner cable 40 is connected to a parking handle or parking pedal (not shown), and the other end is connected to one end of the parking brake lever 34. is rotatably connected to. A cap 42 having a Y-shape as a whole is provided at the distal end of the outer casing 38, and the cap 42 is connected to a first portion 48 through which the inner cable 40 is passed longitudinally and to a substantially central portion in the longitudinal direction of the first portion 48. It has a second portion 50 that protrudes from the bottom at a predetermined angle. cap 42
One end of a pressing member 44 made of an incompressible member is fixed to the second portion 50 of the parking brake lever 34 , and the other end of the pressing member 44 is connected to the other end of the parking brake lever 34 via a connector 52 . The parking brake lever 34 and the pressing member 44 are rotatably connected to each other, and the parking brake lever 34 and the pressing member 44 are substantially perpendicular to each other. As a result, the leading end of the outer casing 38 is attached to the other end of the parking brake lever 34 at a fixed relative distance with a predetermined distance therebetween. In this embodiment, the pressing member 44 constitutes a connecting member. More preferably, the predetermined distance is set so that the predetermined distance is approximately equal to the distance between one end of the parking brake lever 34 and the tip of the outer casing 38 when the inner cable 40 is pulled in. The two ends of the lever 34 and the tip of the outer casing 38 are determined to form an isosceles triangle with the tip of the outer casing 38 as its apex. Also,
A hanging member 5 fixed to the cap 42 and the vehicle body 46
A spring 58 is tensioned between the outer casing 38 and the parking brake lever 6 to constantly bias the outer casing 38 and the like in a direction away from the parking brake lever 34. The support portion 30 is integrally provided with a protrusion 60 that protrudes in a direction parallel to the axis of the cylinder portion 16.
The parking brake lever 34 is located between the tip of the protrusion 60 and the vicinity of the end of the parking brake lever 34 on the side where the pressing member 44 is connected.
A return spring 62 is provided to constantly bias the parking brake lever in the non-operating direction, and a stopper 64 is provided on the support portion 30 to prevent the parking brake lever 34 from returning by a predetermined amount or more based on contact with the protrusion 36. is provided.

When operating the parking brake of the disc brake with parking brake configured in this way, when the inner cable 40 is pulled in,
The reaction force moves the distal end of the outer casing 38 toward the distal end of the inner cable 40, so that the distal end of the outer casing 38 presses the parking brake lever 34, which is attached to the parking brake lever 34 at a fixed relative distance, via a pressing member 44 or the like. A force in the brake operation direction is also applied to the other end (upper end in the figure). As a result, the parking brake lever 34
Since a substantially coupled brake operating force is applied to both ends located on opposite sides of the parking brake lever 34 with the rotation shaft 32 in between, the rotation radius, brake operation stroke, etc. of the parking brake lever 34 are relatively small. Even in this case, a larger rotational force can be obtained on the rotation shaft 32 than in the conventional case. As a result, a larger thrust force is transmitted to the piston 22 via the toggle 41 etc. than in the past, and sufficient parking brake force is obtained, and braking efficiency is further improved.

Further, according to this embodiment, since the pressing member 44 and the parking brake lever 34 are substantially perpendicular to each other, the reaction force transmitted from the outer casing 38 to the parking brake lever 34 via the pressing member 44 is Less loss, rotation axis 3
This can contribute more favorably to the increase in rotational force of No. 2.

In addition, in the above-mentioned embodiment, the pressing member 44
The reaction force generated in the outer casing 38 via the connector 52 and the like is applied to the parking brake lever 3.
4, but it does not necessarily have to be configured in this way; for example, the second portion 50 of the cap 42 may be made longer and its tip end connected to the other end of the parking brake lever 34. It is also possible to attach it directly to.

Further, in the above-mentioned embodiment, the rotation shaft 32 is provided in the middle part of the parking brake lever 34, and both ends of the parking brake lever 34 are spaced approximately the same distance apart from the rotation shaft 32 and are located on opposite sides of each other. The outer casing 38 and the inner cable 40 are connected to each other, but even if the distances between the rotation shaft 32 and both ends of the parking brake lever are different from each other, the rotation of the parking brake lever is If the inner cable 40 is connected to portions on opposite sides of the shaft 32 and the outer casing 38 is connected to the parking brake lever at a fixed relative distance via a connecting member that is substantially perpendicular to the parking brake lever, A certain effect of the present invention can be obtained.

Above, we have explained one application example of the present invention.
The present invention can be effectively applied to systems other than disc brakes with parking brakes. In this case, the rotating member does not necessarily have to be a longitudinal member as in the above-mentioned embodiments, but may have various shapes such as a circular shape or a triangular shape.

In addition, various changes may be made to the present invention without departing from the spirit thereof.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a disc brake with a parking brake equipped with a cable type operating device according to the present invention. FIG. 2 is a rear sectional view showing essential parts of the caliper in FIG. 1. 32: Rotating shaft, 34: Parking brake lever (rotating member), 38: Outer casing, 4
0: inner cable, 44: pressing member (connecting member).

Claims (1)

[Claims for Utility Model Registration] A flexible outer casing and an inner cable longitudinally disposed within the outer casing so as to be movable in the axial direction, the inner cable being axially movable with respect to the outer casing. By relatively moving the rotating member connected to the inner cable, the operating force applied to the inner cable is converted into the rotational force of the rotating shaft integrally provided to the rotating member. In the cable type operating device used for converting, a portion of the rotating member opposite to the side to which the inner cable is connected with respect to the rotating shaft and an end of the outer casing are connected to each other by the rotating member. A cable-type operating device characterized by comprising a connecting member that is connected to the member at a fixed relative distance in a state that is substantially perpendicular to the member.