JPH072431A - Cable reel for steering - Google Patents

Abstract

PURPOSE:To increase a preventive effect of a sliding noise in a facing up part by applying grease of low oil separating degree at a high temperature to the sliding part of case, gear, etc., in a device for electrically connecting fixed and movable bodies through a flat cable. CONSTITUTION:In a steering device for an automobile, in the case of transmitting a signal between a steering wheel side and a body side of the automobile, a cable reel of storing a tape electric wire (flat cable) 5 in a spring shape in a housing, provided with inner and outer cylinders 1, 2, is used, to absorb rotation of the steering wheel by winding the tape electric wire 5 tightened and loosened. In the cable reel thus obtained, grease of pure fluorine, silicone and fluorosilicone, with high base oil viscosity (500cst or more) at an ordinary temperature and low oil separating degree (3% or less) at a high temperature, is applied to a sliding part of case, gear, etc., of the inner/outer cylinders. In this way, a sliding noise can be decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable reel for electrically connecting a fixed body and a movable body by using a flat cable, and particularly to a cable reel suitable for use in a steering device of an automobile. It is about.

[0002]

2. Description of the Related Art For example, when signals are transmitted between a steering wheel side and a vehicle body side of an automobile, devices shown in FIGS. 1 and 2 are used. That is, the tape electric wire is housed in a housing having an inner cylinder and an outer cylinder, and the rotation of the handle is absorbed by tightening and loosening the tape electric wire.

[0003]

The cable reel has a case of an inner cylinder and an outer cylinder, and a gear part has a rubbed portion, and there is a problem that a sliding noise is generated each time the cable reel is rotated. If you apply a mineral grease to the ground part,
I could temporarily prevent the noise, but it didn't last long.

[0004]

[Means for solving the problem] Noise can be prevented by applying grease having high base oil viscosity at room temperature and low oil separation at high temperature to the case and the grounded portion of the gear. And, it was found that the effect was prone to such a degree that there was no practical problem. Grease suitable for this purpose is pure fluorine type, silicone type fluorosilicone type, etc., the base oil viscosity is 500 cst or more, and the oil separation degree (150 ° C
/ 24 hr) is preferably 3% or less.

[0005]

[Example] A cable reel in which CRYTOX GPL205 (manufactured by DuPont) and G-30H (manufactured by Shin-Etsu Silicon Co., Ltd.) SG3451 (manufactured by Toshiba Silicon Co., Ltd.) are applied to the case and the geared portion of the gear is 500 ° C. at 105 ° C. No sliding noise was generated due to rotation even after left for a while.

[0006]

EFFECTS OF THE INVENTION The greases, CRYTOX GPL205, G30H and SG3451 described in the examples all have a base oil viscosity of 500 cst or more and an oil separation degree of 3% or less. There is a long-lasting effect of preventing sliding noise at the mating part, and the effect of increasing the practical value of the cable reel is remarkable.

[Brief description of drawings]

FIG. 1 shows an assembled cable reel of the present invention.

FIG. 2 shows the elements of the cable reel of the invention before assembly.

[Explanation of symbols]

 1: Cable reel inner cylinder 2: Cable reel outer cylinder 3: Lapping part 4: Lapping part 5: Flat cable 6: Flat cable extraction part 7: Flat cable extraction part 8: Holder

Claims (3)

[Claims] 1. A cable reel in which an electric connection between a fixed body and a movable body is performed using a flat cable,
A cable reel characterized in that grease having a high base oil viscosity at room temperature and a low oil separation degree at high temperature is applied to the rubbed portion of the case, gear, etc. 2. The cable reel according to claim 1, wherein the grease applied to the rubbed portion of the case, the gear or the like is pure fluorine, silicon or fluorosilicone. 3. The grease applied to the rubbed portion of a case, a gear or the like has a base oil viscosity at room temperature of 500 cst or more and an oil separation degree at a high temperature of 3% or less. The listed cable reel.