JP2001323918A - Damper and connecting mechanism for push-pull cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a push-pull cable connecting mechanism having the structure suitable for mass production, manufacturable by molding, and moderately operable by smoothly starting the stroke in the starting stage of the lever operation with appropriate increase of the operating force on the way of the operation. SOLUTION: A damper 10 inserted between an eye end 2 fixed to a terminal of a cable 1 and a pin 12 inserted into the eye end 2 is formed of an elliptic hole 21 having a longitudinal axis crossing the push-pull direction of the eye end 12, and a damper push 3, with both ends inserted into the elliptic hole 2 with tension and with central part loosely fitted with a required clearance 20 and 20 and having a metal bush 32 externally fitted on the pin 12 embedded in the central part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to an improvement in the operability of a push-pull cable for remotely controlling a transmission of an automobile using a shift lever provided in a driver's seat.

[0002]

2. Description of the Related Art A push-pull cable is used to connect a transmission and a shift lever of an automobile, and an eye end fixed to a terminal of the cable and a driven pin provided on the transmission or the shift lever are connected via a damper bush. are doing. In order to improve the operational feeling of the damper bush, the stroke starts smoothly at the start stage of the lever operation disclosed in Japanese Utility Model Publication No. 7-44812, and there is a sense of moderation with a moderate increase in operating force in the middle. A damper bush that enables operation has been proposed.

[0003]

The above-mentioned damper bush requires a rigid bush core (collar) composed of a cylindrical portion and an oval flange on the outer periphery thereof. Therefore, there is a disadvantage that machining of the bush core is troublesome. An object of the present invention is a structure suitable for mass production that can be manufactured by molding, in which a stroke is started smoothly at a start stage of a lever operation, and a moderate operation can be performed with a moderate increase in operating force in the middle of the push. An object of the present invention is to provide a connection mechanism of a pull cable.

[0004]

SUMMARY OF THE INVENTION The present invention is a damper interposed between an eye end fixed to a terminal of a push-pull cable and a pin inserted into the eye end. A long hole having a long axis perpendicular to the direction, and both ends are tightly inserted into the long hole, and the central portion is loosely fitted with a required gap,
And a rubber damper bush in which a metal bush that is externally fitted to the pin is embedded in the center.

[0005]

According to the present invention, the stroke starts smoothly at the start of the lever operation in the molding of resin and rubber, and a moderate operation can be performed with an appropriate increase in the operating force on the way. A push-pull cable connection mechanism can be formed. This eliminates the need for mechanical processing of the bush core, thereby reducing costs. Further, since the eye end (eye rod) can be easily molded integrally with resin or light metal, the processing cost can be reduced.

According to a second aspect of the present invention, in the damper, an intermediate portion in a thickness direction of a wall surface facing the gap of the elongated hole is bulged, or a portion of the metal bush facing the gap is It is characterized by being swollen. With this configuration, since the metal bush is smoothly inclined and displaced until the gap is crushed, the stroke can be smoothly performed at the start stage of the lever operation, and the operational feeling is further improved.

[0007]

1 and 2 show a push-pull cable damper 10 and a push-pull cable connecting mechanism 100 having the damper 10 according to a first embodiment of the present invention. An eye end 2 fixed to an end of an inner cable 1 of a push-pull cable connecting a transmission of an automobile to a shift lever, and a pin 12 fixed to a driven rotating member (lever) 11 of the transmission. Between them, a damper bush 3 is interposed.

The eye end 2 has a horizontally long substantially hexagonal plate shape integrally formed of a resin, and has an oval hole 21 having a central axis perpendicular to the push-pull direction of the cable 1 at the center thereof as shown in FIG.
It is pierced vertically as shown in FIG. The oblong hole 21
Each of the side walls 2A and 2B has a drum-shaped cross section in which an intermediate portion in the thickness direction bulges in an arc shape. A cable fixing portion 22 into which the end of the cable 1 is inserted and fitted is formed in a columnar shape on the right side of the eye end 2 shown in FIG.

The cable fixing portion 22 has a cylindrical shape at first, and an end having an enlarged portion of the cable 1 is inserted into the cable fixing portion 22 and fixed by heat caulking. Step edges 23 are provided around the upper and lower edges of the oblong hole 21 as shown in FIG. The eye end 2 may be formed by die casting of a light metal such as aluminum.

The damper bush 3 includes a rubber body 31 having a substantially oval cross section corresponding to the oval hole 21, and a metal bush (collar) 32 made of gunmetal buried vertically through the center of the rubber body 31. Have. Rubber body 31
Has a substantially cocoon-shaped cross section in this embodiment,
3, the width of both sides 34, 34 is large. The central portion 33 has a shape in which the central portion 3A is slightly swelled by burying the metal bush 32.

When the rubber body 31 is fitted in the oblong hole 21, both sides 34, 34 are tightly fitted on both sides of the oblong hole 21, and the central portion 33 is between the inner wall of the oblong hole 21. Have gaps 20 and 20. The gaps 20 and 20 and the rubber body 31 constitute the damper 10 of the present invention. At the start stage of the lever operation, when a push or pull force acts on the cable 1, the reaction force generated in the driven rotation member 11 is reduced. In between, there is a shift in the operating position.

For this reason, the metal bush 32 is initially displaced while being inclined in the gaps 20, 20. As a result, the stroke of the operation of the operation lever is started smoothly, and the metal bush 32 engages by crushing the gaps 20, 20 on the way. As a result, as shown in the graph of FIG. 3, a modest operation can be performed with an appropriate increase in the operation force. In addition,
Each of the side walls 2A and 2B may have a cross section in which an intermediate portion in the plate thickness direction bulges in a wedge shape, a trapezoid shape, or the like. Also, the side wall 2
Even if A and 2B are flat, operability can be improved to some extent.

In this embodiment, on the upper and lower surfaces of the rubber body 31, oval-shaped flanges 35, 35 are extended, and approximately half of the thickness is tightly fitted into the step edge 23. Has become. The flanges 35, 35 and the step edges 23, 23
When the push or pull force acts on the cable 1, the center axis of the rubber body 31 and the oblong hole 2
(1) An appropriate resistance force is applied to the tilt displacement with respect to the central axis.

The upper end of the pin 12 is provided with a tapered surface 13 and a clip groove 14. Metal bush 32
At the upper end of the is formed slits 37, 37 orthogonal to the axis, facing backward. A spring clip 4 including a substantially Ω-shaped connecting portion 41, a parallel bar-shaped intermediate portion 42, and a C-shaped open end portion 43 is fitted into the slits 37, 37.

The spring clip 4 and the upper flange 35
And a washer 44 is interposed between them. The washer 44 is externally fitted to the metal bush 32 and locked by the spring clip 4, and has a function of preventing the spring clip 4 from contacting the upper flange 35 to damage the rubber body 31.

When the metal bush 32 is pressed against the pin 12, the spring clip 4 expands at the tapered surface 13, and then the intermediate portion 42 of the spring clip 4 is inserted into the clip groove 14. Get stuck. To remove the eye end 2 from the pin 12, the middle end 42 of the spring clip 4 is disengaged from the clip groove 14 by expanding the open end 43 of the spring clip 4 spreading in a C shape with a finger or a tool. Thus, a one-touch attachment / detachment mechanism 5 that can be attached / detached with one touch is formed.

FIGS. 4 and 5 show a second embodiment. In this embodiment, the central portion 25 of the oblong hole 21 is formed wide. The rubber body 31 has a central portion 33 on both sides 34, 3
4 is formed wider. The metal bush 32 has a central spherical portion 36. Due to the burying, the bulging amount of the central portion 3A of the rubber body 31 is large. Between the oval hole 21 and the body 31, gaps 20, 20 are formed at the center. Also in this embodiment, the first type shown in FIGS.
An effect similar to that of the embodiment is obtained.

[Brief description of the drawings]

FIG. 1 is a plan view and an assembly front view of a push-pull cable connection mechanism according to a first embodiment.

FIG. 2 is an assembled perspective view of the damper bush of the first embodiment.

FIG. 3 is a characteristic graph of the operating force of the shift lever of the first embodiment.

FIG. 4 is an assembled front view of a push-pull cable connection mechanism according to a second embodiment.

FIG. 5 is an assembled perspective view of a connection mechanism for a push-pull cable according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cable 2 Eye end 3 Damper bush 4 Spring grip 5 One-touch attachment / detachment mechanism

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J032 AB06 AB33 BA02 BC06 3J059 AB20 AD05 BA42 BD01 BD03 BD07 CB11 EA03 GA12 GA16 GA20 3J070 AA03 BA12 BA54 BA75 CC23 CC29 CC33 DA01 EA11

Claims (4)

[Claims] 1. A damper interposed between an eye end fixed to a terminal of a push-pull cable and a pin inserted into the eye end, wherein the eye end has a long axis orthogonal to a push-pull direction. A rubber in which both ends are tightly inserted into the elongated hole and the metal bush is fitted at the center with a required gap, and a metal bush is fitted to the pin at the center. A push-pull cable damper comprising a damper bush. 2. The push-pull cable damper according to claim 1, wherein an intermediate portion in a thickness direction of the wall surface of the elongated hole facing the gap bulges. 3. The push-pull cable damper according to claim 1, wherein a portion of the metal bush facing the gap is bulged. 4. A connection mechanism for a push-pull cable, comprising the damper according to claim 1, and having an eye end integrally formed of resin or light metal.