JPH0317051Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a control cable vibration isolation device. More specifically, the present invention relates to a vibration isolating device in which a vibration isolating spring is interposed between both ends of a guide divided into two parts in order to block vibrations transmitted to the guide of a control cable.

[Prior Art] A control cable (hereinafter simply referred to as a cable) consists of a flexible guide and a flexible inner cable slidably inserted into the guide,
The operating means connected to one end of the inner cable is used to remotely control a driven device connected to the other end of the inner cable. Furthermore, one of the guides is fixed near the operating means side, and the other one is fixed near the driven device side, in order to ensure the transmission of force by sliding of the inner cable. Therefore, for example, vibrations generated on the driven equipment side such as the engine are transmitted to the guide, and at the same time, they are also transmitted to the operating means in the cabin fixed to one side of the guide, which are then further transmitted to the vehicle body and cause resonance. This results in discomfort for passengers.

Various ideas have been devised to block the propagation of such vibrations. For example, as in Japanese Utility Model Application No. 57-163014, a method has been devised in which vibrations transmitted to the guide are cut off by dividing the guide into two and providing a certain gap between the respective ends.

[Problems to be solved by the invention] The above-mentioned method is effective in isolating vibrations, but in reality, guides are usually routed in a curved manner, so it is necessary to properly connect their ends to each other. It is impossible to maintain a constant spacing unless they are fixed in position. Also, attempts have been made to interpose a vibration isolating member made of rubber or the like in order to obtain a vibration damping effect by maintaining a constant distance between the respective ends.

However, in the vibration isolating device using the method described above, it is impossible to actually hope to obtain a sufficient vibration damping effect.

[Means for Solving the Problems] The present invention divides the guide of the control cable into two parts, which consists of a flexible guide and an inner cable slidably inserted into the guide. , and in a control cable in which both ends of the two halves are faced to each other with a constant interval, the two opposite ends are housed in a cylindrical casing so as to be slidable and not fall off, A structure is adopted in which at least two kinds of vibration isolation springs having different characteristics are interposed between the two ends, and the vibration isolation springs bias the two ends in mutually opposite directions.

[Function] In a device for remotely controlling a driven device by interposing a cable between the operating means and the driven device, the cable is split into two at the midpoint, and each end of the split is housed in a casing. , a vibration isolator is biased in opposite directions by a vibration isolator inserted between both ends, and the vibration generated in the driven equipment is transmitted to the conductor of one cable, and the vibration isolator When the vibration reaches the vibration isolating device using a spring, the vibration is absorbed by the vibration isolating spring, so the vibration is not transmitted to the other cable guide, and this prevents unpleasant vibrations from being transmitted into the passenger compartment. ing.

[Example] Next, the vibration isolating device of the present invention will be explained with reference to the drawings.

FIG. 1 shows one embodiment of the vibration isolating device of the present invention, and FIGS. 2 and 3 show other embodiments different from FIG. 1.

In FIG. 1, reference numerals 1 and 1' denote a guide divided into two parts, and an inner cable 2 is slidably inserted into the guide, and the respective ends 3 and 3' of the conduit are inserted into the guide. are slidably connected by a casing 4, and two types of vibration isolation springs 5 having different characteristics are interposed between the ends 3 and 3'.

Using a cable with a vibration isolating device structured as described above, for example, a guide 1 is installed on the clutch side of the engine.
When one end of the guide 1' is fixedly attached to the clutch pedal that operates the clutch, vibrations generated by the rotation of the engine, etc. on the clutch side will be absorbed by the clutch pedal, which is fixed to the clutch side. It runs from the end of the guide 1, which is located there, to the end 3, which is divided into two parts. Here, the vibration is transmitted to the vibration isolating spring, but because it is rapidly attenuated, it is hardly transmitted to the end 3' on the guide 1' side, and also to the clutch pedal to which the other end of the guide 1' is fixed. Almost no vibrations are transmitted.

The above-mentioned anti-vibration effect was confirmed in the next test and will be explained below. First, as a test method, a vibration tester (vibration generator) was used to test a cable with a structure according to the above-mentioned reference, that is, a cable with a rubber interposed between the ends of a guide divided into two parts,
Using a cable with a vibration isolator according to the present invention,
Fix one end of each guide to the vibration tester,
After attaching an acceleration pickup to the other end, various vibrations were generated using a vibration tester and frequency analysis was performed. The results of this analysis recorded on a recorder are shown in FIG.

In FIG. 4, the vertical axis shows vibration acceleration (G), and the horizontal axis shows frequency (Hz). As is clear from this graph, the vibration acceleration of the cable using the device of this invention is slightly larger in the range of 200Hz to 300Hz than that of the conventional device, but it is almost average in the other frequency bands. However, it has been found that the conventional type has a drawback of having a large vibration acceleration especially at the resonance point between 200Hz and 400Hz.

[Effects of the invention] Through the above-mentioned tests, it has been proven that the cable vibration isolating device of the present invention has an extremely superior vibration isolating effect compared to conventional ones, and is particularly suitable for use in automobile engines, etc. 200Hz to 400Hz generated in
Vibration in the frequency band causes the most discomfort to the human body, and since the vibration acceleration in this band can be extremely reduced compared to conventional methods, the discomfort caused to the human body can be significantly reduced. effective.

[Brief explanation of the drawing]

The drawings are related to the present invention, and FIG. 1 is a partially cutaway side view of the main part showing one embodiment, and FIG.
3 and 3 are partially cutaway side views of main parts of another embodiment different from FIG. 1, and FIG. 4 is a graph showing frequency analysis based on the present test. 1, 1': Guide, 2: Inner cable, 3, 3': End of guide, 4: Casing, 5: Anti-vibration spring.

Claims (1)

[Claims for Utility Model Registration] 1. The guide of a control cable consisting of a flexible guide and an inner cable slidably inserted into the guide is divided into two parts; In a control cable in which both ends face each other at a constant interval, the two facing ends are housed in a cylindrical casing so as to be slidable and not fall off, and the both ends A vibration isolating device for a control cable, characterized in that at least two kinds of vibration isolating springs having different characteristics are interposed between the two end portions of the control cable, and the two end portions are biased in opposite directions by the vibration isolating springs. 2. The vibration isolating device for a control cable according to claim 1, wherein the vibration isolating spring is a composite body consisting of at least two types of coil springs having different characteristics. 3. The vibration isolating device for a control cable according to claim 1, wherein the vibration isolating spring is a composite of a coil spring and a disc spring assembly.