JPS6347289Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for preventing vibration of a control cable that transmits operating force by tension.

For example, when connecting a car's clutch pedal and clutch operating lever with a control cable, if the end of the cable is connected to the lever,
Engine vibrations are transmitted to the pedals via the cables, causing discomfort to the driver. Conventionally, as a preventive measure, the terminal of the control cable a made of twisted wires is connected to the bottom plate, as shown in Figure 1. The cable a is inserted into the center hole d of a cylindrical synthetic rubber elastic body c that is tightly fitted into a metal case b, and a metal fitting e having a patch plate f is fixed to the end thereof. The part protruding from the case b is fitted into the groove j on the bottom of the connector i connected to the lever g with a pin h, and by applying a spring force to the lever g, the backing plate f is connected to the elastic body c, and
The bottom plate of case b is brought into contact with the bottom surface of connector i, and the cable a and connector i are compressed by the elastic body c.
The structure is such that the vibration of the control cable a is absorbed by the elasticity of the elastic body c, and the metal case b prevents the elastic body c from being abnormally deformed or damaged. There is a known device designed to improve the durability of the elastic body by preventing it from happening, but in the conventional device, when the control cable a is pulled and a compressive load is applied to the elastic body c, The outer periphery of elastic body c is case b
, and the radial expansion due to axial compression is prevented, so the load P/deflection δ characteristics change as the load P increases, as shown by characteristic curve B in Figure 3. When the spring constant increases rapidly and reaches a constant load Pa, the characteristic is such that no deflection δ occurs, and in the high load region above the constant load Pa,
There was a problem in that the elastic body c lost its elasticity and could not perform its anti-vibration function.

Incidentally, such a situation similarly occurs when the vibration isolator is provided on the clutch pedal side or when it is applied to a control cable for other purposes.

The present invention has been developed in view of the above points, and is a control system that exhibits excellent vibration isolation performance even when the tensile force of the control cable increases, and that does not impair the durability of the elastic body. The purpose of this invention is to provide a cable vibration isolator.

Hereinafter, one embodiment of the present invention will be described with reference to FIG. 2. In this embodiment, the shape of the elastic body 1 made of synthetic rubber is determined by the length in the axial direction, as shown in a in the figure. The maximum outer diameter and the diameter of the center hole 2 are the same as those of the conventional elastic body c shown in FIG. The enlarged diameter portions 4, 4 at both ends of the elastic body 1
Only the metal case b is tightly fitted.

In this embodiment, the central part 3 of the elastic body 1 and the case b
A gap 5 is formed between the elastic body 1 and the elastic body 1. As shown in FIG. Since it is possible to bulge out to fill the gap 5 without causing any damage, the load P and sag δ characteristics are small and constant in the low load region, as shown by characteristic curve A in Figure 3. Even in a high load region exceeding the load Pa, the spring constant only gradually increases, and even in a high load region where the conventional permeable body c loses its elasticity, the elastic body 1 of this embodiment maintains its elasticity. Furthermore, since the enlarged diameter portions 4, 4 at both ends are tightly fitted into the case b, the elastic body 1 is prevented from tilting or bouncing.

In the above embodiment, the size of the gap 5 between the elastic body 1 and the case b is set to such a size that the gap 5 is just filled when the maximum load is applied to the elastic body 1. In this way, the elasticity of the elastic body 1 can be reliably maintained within the range of action of the compressive load.

That is, in the control cable vibration isolating device of the present invention, the terminal of the control cable that transmits the operating force by tension is inserted into the insertion hole provided in the mating member, and the metal fitting fixed to the terminal of the cable and the mating member are connected. A cone-shaped elastic body with a reduced diameter at the center is interposed between the cables and the mating member to cause relative movement between the cable and the mating member by compression of the elastic body. The main feature is that a metal case is fitted around the outer periphery of the elastic body, and the enlarged diameter portions at both ends fit tightly together.Since the elastic body is made into a clasp shape with a reduced diameter in the center, it can withstand high loads. It can maintain its elasticity even when
It can effectively absorb the vibration of the control cable, and since the enlarged diameter parts at both ends are tightly fitted into the metal case, the elastic body will not tilt or dance, causing abnormal deformation or This has the effect of preventing damage and loss of durability.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional vibration isolator, Fig. 2a is a sectional view of an embodiment of the present invention, Fig. 2b is a sectional view for explaining its operation, and Fig. 3 is a load deflection characteristic line. It is a diagram. 1: Elastic body, 3: Center part, 4: Expanded diameter part, a: Control cable, b: Metal case, e: Metal fitting, g: Lever, i: Connector, j: Groove.

Claims (1)

[Scope of utility model registration request] The end of a control cable that transmits operating force by tension is inserted into an insertion hole provided in a mating member, and the central part is reduced in diameter between the metal fitting fixed to the end of the cable and the mating member. The elastic body is interposed so that relative movement is caused between the cable and the mating member by compression of the elastic body, and the enlarged diameter portions at both ends are tightly attached to the outer periphery of the elastic body. A control cable vibration isolator characterized by having a mating metal case fitted.