JPH0221614Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotational output transmission cable device, and particularly to a rotational output transmission cable device suitable for transmitting the rotational output from a speed sensor of a vehicle to an odometer. It is.

[Prior art]

This type of cable transmission device will be explained based on FIGS. 3 and 4.

In the figure, a speed sensor 1 that is a rotational force output section and an odometer 2 that is a rotational force input section are connected by a flexible cable 3, and the speed sensor 1 and odometer 2 are each fixed in an instrument case (not shown). ing. The cable 3 is made of iron, and its base end is protected by cylindrical holders 4 and 5 fixed to the speed sensor 1 and odometer 2, respectively, and the middle part is protected by a steel wire tube whose both ends are fixed to the holders 4 and 5. 6 and iron wire tube 6
It is covered with a resin cylinder 7 that protects the outer periphery of the cylinder.
The iron wire tube 6 is a pipe formed by twisting band-shaped iron wires in a helical shape, and is in contact with the cable 3 with a certain gap therebetween, and is flexible enough to bend together with the cable 3.

FIG. 4 is a cross-sectional view of the middle part of the cable 3 taken along line A-A in FIG. , is covered with a resin cylinder 7.

[Problem that the invention attempts to solve]

In the above-mentioned cable transmission device, the speed sensor 1 and the odometer 2 are arranged so that the cable 3 is curved.
The repulsive force caused by this curvature acts on the speed sensor 1 and odometer 2 main bodies via the holders 4 and 5, causing deformation of the speed sensor 1 and odometer 2 cases and damage to the cables when the environmental temperature is high. This may cause the shaft connected to 3 to squeak, or deformation of the shaft, resulting in an inability to drive.

Further, since the cable 3 and the iron wire tube 6 are both made of metal, there is a drawback that if they come into contact with each other during driving, noise will be generated and the cable 3 will be worn out, promoting deterioration of the cable 3.

Furthermore, since the cable 3 is covered with a large number of parts such as the iron wire tube 6, the resin tube 7, and the holders 4 and 5, it has been difficult to reduce manufacturing costs.

The present invention was created in view of the above points, and eliminates unnecessary loads on rotational force output or input devices such as speed sensors and odometers, and connects them reliably and smoothly with a flexible cable. The object of the present invention is to provide a rotational output transmission cable device whose structure is simplified without using a steel wire tube or the like, and whose manufacturing cost is reduced.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a rotational output transmission cable device in which a rotational force output section fixed in an instrument case and a rotational force input section are connected by a flexible cable protected by a pipe. , the pipe is formed in a straight line with resin, and this straight pipe is arranged so as to cover only the middle part of the cable and fixed in the instrument case, and the rotational force output side of the cable and the rotational force are A plurality of inner guides covering both end portions are loosely fitted to both end portions exposed from both ends of the linear pipe on the input section side, and the number of inner guides loosely fitted to both end portions is determined as follows. The number of inner guides is such that the length of the entire length of the inner guide along the cable is shorter than the distance between each end of the linear pipe and the rotational force output section and the rotational force input section.

[Effect]

According to the present invention, the middle part of the cable is a straight pipe arranged in a straight line, and both end parts are arranged such that the entire length of the loosely fitted inner guide is equal to each end of the straight pipe, the rotational force output part and the rotational force output part. Since the number of inner guides is shorter than the distance to the force input part, the inner guides are arranged at equal intervals and can be bent freely, making it suitable for the speed sensor, which is the rotational force output part, and the odometer, which is the rotational force input part. No load is applied due to bending, and the contact resistance between the cable and the pipe when the cable is driven is reduced.

〔Example〕

FIG. 1 is a sectional view showing an embodiment of the present invention.
In the figure, a speed sensor 1 and an odometer 2 are connected by a flexible cable 3 whose both ends are supported by inner holders 3a and 3b. A straight pipe 8 made of synthetic resin is loosely fitted into the middle of the cable 3, and the area around the cable 3 from both ends of the pipe 8 to the inner holders 3a and 3b has a cross section as shown in the figure. A plurality of inner guides 9 are substantially triangular rings.
is loosely fitted. The number of inner guides 9 loosely fitted into the cable 3 from both ends of the pipe 8 to the inner holders 3a and 3b is determined by the total length of the inner guides 9 along the cable 3 between both ends of the pipe 8 and the inner holders 3a and 3b. The number is such that the distance is shorter than the distance to 3a and 3b. Both ends of the pipe 8 have flared portions 8a, 8a that are expanded toward the tip, and the inner guides 9 are arranged at equal intervals from the flare pressurizing portion 8a to the inner holder 3a.

FIG. 2 is an exploded perspective view showing the relationship between the speed sensor 1, odometer 2, and cable 3 shown in FIG. 1, and the case 10 to which they are attached.
In the figure, a case 10 integrally has a recess 10a for fixing the speed sensor 1 and a pedestal 10b for attaching the odometer 2, and each has a fixing notch 10c, an elastic claw 10d, a positioning pin 10e, etc. Or odometer 2
to be fixed.

A mounting portion for the pipe 8 loosely fitted into the intermediate portion of the cable 3 is integrally provided on one side wall of the case 10 located between the recess 10a and the pedestal 10b. The mounting part is 3 in a straight line to hold the pipe 8.
Consisting of U-shaped grooves 10f arranged side by side and notches 10g that engage the flared parts 8a at both ends of the pipe 8, the hype 8 is inserted into the groove 10f while fitting the flared parts 8a into the notches 10g from above. By pushing in, the pipe 8 is positioned in the longitudinal direction of the cable 3 and fixed to the case 10.

In this state, the cable 3 is connected to the inner holder 3.
a and 3b and are guided into the pipe 8 in a straight line within the pipe 8. However, the entire length of the loosely fitted inner guide 9 in the curved portion extends to each pipe 8. Since the inner guides 9 are loosely fitted at equal intervals and the number is shorter than the distance between the end and the inner holders 3a, 3b, the inner guides 9 can be freely bent, and the inner guides 9 can be bent freely and the inner holders 3a, 3b, the speed sensor 1, and the odometer 2 main body. is not subjected to any load due to the bending of the cable 3. In addition, since the pipe 8 is fixed in a straight line in the case 10, the cable 3
Even during drive rotation, etc., the contact resistance between the cable 3 and the inner wall of the pipe 8 is extremely small.

Further, in the above embodiment, the pipe 8 is made of synthetic resin material. Therefore, the weight of the member that protects the area around the cable 3 is reduced, and
The iron cable 3 and the resin pipe 8 make little sliding noise when they come into contact, and the cable 3 suffers little wear.

[Effect of idea]

The present invention is as described above, in which a pipe is formed into a straight line with resin, this straight pipe is arranged so as to cover only the middle part of the cable, and is fixed in the instrument case, and the rotational force of the cable is output. A plurality of inner guides that cover both end portions are loosely fitted into both end portions exposed from both ends of the straight pipe on the section side and the rotational force input side, respectively, and the inner guides loosely fitted on the both end portions are The number of inner guides is such that the length of the entire inner guide along the cable is shorter than the distance between each end of the linear pipe and the rotational force output section and the rotational force input section. Therefore, the repulsive force due to the curvature of both ends of the cable does not act on the rotational force output section and the rotational force input section, and this prevents deformation of the frames of the rotational force output section and rotational force input section, squeaks of the shaft connected to the cable, etc. This enables reliable transmission of driving force. In addition, since the pipe is straight and fixed to the case, the contact resistance with the pipe when driving the cable is small, reducing sliding noise and frictional resistance.
Deterioration of the cable can be prevented, the cable can be guided reliably, and contact with other parts can be avoided.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the embodiment of the present invention, Fig. 2 is an exploded perspective view of the embodiment, Fig. 3 is a sectional view of the conventional example, and Fig. 4 is a sectional view of the embodiment of the present invention.
The figure is a sectional view taken along the line A-A in FIG. 3. 3...cable, 8...pipe.

Claims (1)

[Scope of Claim for Utility Model Registration] In a rotational output transmission cable device in which a rotational force output part and a rotational force input part fixed in an instrument case are connected by a flexible cable protected by a pipe, the said pipe is made of resin. The straight pipe is arranged so as to cover only the middle part of the cable and fixed in the instrument case, and the straight pipe is formed on the rotational force output side and the rotational force input side of the cable. A plurality of inner guides covering both end portions are loosely fitted into both end portions exposed from both ends of the shaped pipe, and the number of inner guides loosely fitted to the both end portions is calculated as the number of inner guides along the cable. A rotational output transmission cable device characterized in that the number of guides is such that the length of the entire length of the guides is shorter than the distance between each end of the linear pipe and the rotational force output section and the rotational force input section.