JP4567845B2 - Push-pull cable damper and coupling mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention mainly relates to improvement in operability of a push-pull cable for remotely operating a transmission of an automobile with a shift lever provided in a driver's seat.
[0002]
[Prior art]
A push-pull cable is used to connect a transmission and a shift lever of an automobile, and an eye end fixed to the end of the cable and a driven pin provided on the transmission or the shift lever are connected via a damper bush. In order to improve the operation feeling of this damper bush, the stroke is smoothly started 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 on the way. A damper bush that enables operation has been proposed.
[0003]
[Problems to be solved by the invention]
The above-described damper bush requires a bush core (collar) having rigidity including a cylindrical portion and an oval collar portion on the outer periphery thereof. For this reason, there exists a fault that machining of this bush core is troublesome.
The purpose of the present invention is a structure suitable for mass production that can be manufactured by molding, and the stroke starts smoothly at the start of lever operation, and a push operation that allows a moderate operation with a moderate increase in operating force along the way. To provide a pull cable connection mechanism.
[0004]
[Means for Solving the Problems]
The present invention is a damper interposed between an eye end fixed to the end of a push-pull cable and a pin inserted into the eye end,
A long hole having a long axis perpendicular to the push-pull direction at the eye end, and both ends are tightly inserted into the long hole, and the center part is loosely fitted with a required gap, and the center part It is characterized by comprising a rubber damper bush embedded with a metal bush fitted on the pin.
[0005]
[Operation and effect of the invention]
In the present invention, the push-pull cable coupling mechanism allows a smooth stroke at the start of lever operation in the molding of resin and rubber, and allows a moderate operation with a moderate increase in operating force. Can be formed. As a result, the machining of the bush core is not required and the cost can be reduced, and the eye end (eye rod) can be easily formed integrally with resin or light metal, so that the processing cost can be reduced.
[0006]
According to the damper according to claim 2, eye end a plate shape, the middle portion of the thickness direction of the wall surface that faces between gap of the slot is bulged.
Further, according to the damper of claim 3, the face's portion between clearance of the metal bushing that put out Rise. With this configuration, since the metal bush smoothly inclines and displaces until the gap is crushed, the stroke can be smoothly performed at the start of the lever operation, and the operation feeling is further improved.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show a push-pull cable damper 10 and a push-pull cable coupling mechanism 100 having the damper 10 according to a first embodiment of the present invention. An eye end 2 fixed to an end portion of an inner cable 1 of a push-pull cable connecting a transmission and a shift lever of an automobile; a pin 12 fixed to a driven rotation member (lever) 11 of the transmission; A damper bush 3 is interposed between them.
[0008]
The eye end 2 has a horizontally long substantially hexagonal plate shape integrally molded with resin, and an oblong hole 21 having a long axis perpendicular to the push-pull direction of the cable 1 at the center is vertically shown in FIG. It is pierced through. The oblong hole 21 has a drum-shaped cross section in which the side walls 2A and 2B bulge in the middle in the thickness direction in an arc shape. A cable fixing portion 22 into which an end portion of the cable 1 is inserted and fitted is formed in a columnar shape on the right side portion of the eye end 2 shown in FIG.
[0009]
The cable fixing portion 22 is initially in a cylindrical shape, and an end portion having an enormous portion of the cable 1 is inserted therein and fixed by heat caulking. Step edges 23 are provided around the upper and lower edges of the oval hole 21 as shown in FIG. The eye end 2 may be molded by light metal die casting such as aluminum.
[0010]
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 embedded vertically through the center of the rubber body 31. In this embodiment, the rubber body 31 has a substantially bowl-shaped cross-sectional shape, with the central portion 33 having a small width and both side portions 34 and 34 having a large width. The central portion 33 has a shape in which the central portion 3 </ b> A is somewhat bulged by embedding the metal bush 32.
[0011]
In a state where the rubber body 31 is fitted in the oval hole 21, both side portions 34, 34 are fitted tightly on both side portions of the oval hole 21, and the central portion 33 is spaced from the inner wall of the oval hole 21. , 20. The gaps 20 and 20 and the rubber body 31 constitute the damper 10 of the present invention. At the start of lever operation, when a push or pull force is applied to the cable 1, the reaction force generated on the driven rotating member 11 is reduced. There is a deviation of the working position between the two.
[0012]
For this reason, the metal bush 32 is initially inclined and displaced in the gaps 20 and 20. As a result, the stroke of the operation lever is smoothly started, and the metal bush 32 is engaged by crushing the gaps 20 and 20 on the way. As a result, as shown in the graph of FIG. 3, an operation with a sense of moderation can be performed with an appropriate increase in operating force. The side walls 2A and 2B may have a cross section in which an intermediate portion in the plate thickness direction bulges into a wedge shape, a trapezoidal shape, or the like. Even if the side walls 2A and 2B are flat, a certain degree of improvement in operability can be achieved.
[0013]
In this embodiment, oval flanges 35, 35 are extended on the upper and lower surfaces of the rubber body 31, so that approximately half of the thickness fits closely into the step edge 23. . The close fitting between the flange portions 35 and 35 and the step edges 23 and 23 is caused by an inclination displacement between the central axis of the rubber body 31 and the central axis of the oblong hole 21 when a push or pull force is applied to the cable 1. Appropriate resistance is applied to
[0014]
A tapered surface 13 and a clip groove 14 are provided around the upper end portion of the pin 12. In the upper end portion of the metal bush 32, slits 37, 37 perpendicular to the axis are formed so as to face backward. The slits 37, 37 are fitted with spring clips 4 including a substantially Ω-shaped connecting portion 41, a parallel bar-shaped intermediate portion 42, and a C-shaped open end portion 43.
[0015]
A washer 44 is interposed between the spring clip 4 and the upper flange 35. The washer 44 is externally fitted to the metal bush 32 and is locked by the spring clip 4, and has an action of preventing the rubber body 31 from being damaged due to contact between the spring clip 4 and the upper flange 35.
[0016]
When attaching the eye end 2 to the pin 12, when the metal bush 32 is pressed against the pin 12, the spring clip 4 expands on the tapered surface 13, and then the intermediate portion 42 of the spring clip 4 fits into the clip groove 14. . The eye end 2 is detached from the pin 12 by expanding the open end portion 43 of the spring clip 4 which is spread in a C shape with a finger or a tool, so that the intermediate portion 42 of the spring clip 4 is detached from the clip groove 14. Thereby, the one-touch attachment / detachment mechanism 5 that can be attached / detached with one touch is formed.
[0017]
4 and 5 show a second embodiment. In this embodiment, the oval hole 21 is formed with a wide central portion 25. The rubber body 31 has a central portion 33 formed wider than both side portions 34 and 34. The metal bush 32 has a central spherical portion 36, and the bulging amount of the central portion 3A of the rubber body 31 is increased due to the embedding. Between the oval hole 21 and the body 31, gaps 20 and 20 are formed in the center. This embodiment also has the same effect as the first embodiment shown in FIGS.
[Brief description of the drawings]
FIGS. 1A and 1B are a plan view and a front view of assembly of a push-pull cable coupling mechanism according to a first embodiment. FIGS.
FIG. 2 is an assembled perspective view of the damper bush of the first embodiment.
FIG. 3 is a characteristic graph of operating force of the shift lever of the first embodiment.
FIG. 4 is an assembled front view of a push-pull cable coupling mechanism according to a second embodiment.
FIG. 5 is an assembled perspective view of a push-pull cable coupling mechanism according to a second embodiment.
[Explanation of symbols]
1 Cable 2 Eye end 3 Damper bush 4 Spring grip 5 One-touch attachment / detachment mechanism

Claims (4)

A damper interposed between an eye end fixed to the end of the push-pull cable and a pin inserted into the eye end,
A long hole having a long axis perpendicular to the push-pull direction at the eye end, and both ends are tightly inserted into the long hole, and the center part is loosely fitted with a required gap, and the center part A damper of a push-pull cable, comprising a rubber damper bush embedded with a metal bush fitted to the pin. 2. The push pull according to claim 1, wherein the eye end has a plate shape, and a wall surface facing the gap of the elongated hole has a bulging middle portion in the plate thickness direction. Cable damper. The damper according to claim 1, wherein a portion of the metal bush facing the gap is bulged. A push-pull cable coupling mechanism comprising the damper according to any one of claims 1 to 3 and an eye end integrally formed of resin or light metal.

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