JPS60124717A - Gear shift lever - Google Patents

Abstract

PURPOSE:To prevent feeling of disorder at the operation of a shift lever by using a harder rubber of an upper end and a lower end of a vibrationproof rubber in comparison with the hardness of the rubber of other parts. CONSTITUTION:The part corresponding to the upper end part 5a and the lower end part 5b of the vibrationproof rubber 2 of a lower lever 1b is formed respectively as a large diameter, the thickness of rubber 2 corresponding to the large diameter parts 6a, 6b is decreased remarkably in comparison with the other part, the hardness of the rubber of the upper end part 5a and the lower end part 5b is increased so as to improve locally the rigidity. Thus, only the larger diameter parts 2a, 2b of the rubber 2 contact the lever 1a at the normal state where no operating force is activated to an upper lever 1a, the minute vibration and metallic sound transmitted from the transmission to the lever 1b are absorbed by the contact position so as to attain the substantial vibrationproof and sound shut effect. When the operating force is exerted, since the entire deflection of the rubber 2 is limited by the stopper effect of the upper end part 5a and the lower end part 5b of the rubber 2, the feeling of disorder at the operation of the lever is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to improvements in gear shift levers for vehicles.

[Prior art and its problems]

As a gear shift lever of this kind, for example, a gear shift lever related to Japanese Patent Application No. 57-86755 was previously proposed by the present applicant. According to Japanese Patent Application No. 57-86755, a substantially cylindrical anti-vibration rubber 2 is interposed between a tubular upper lever 1a and a lower lever 1b as shown in FIG. Plural circumferential grooves 3a, 3b, 3c on the surface
By forming this, an annular space R is formed between the upper lever 1a and the inner circumferential surface of the upper lever 1a. Note that 4 is a shift knob screwed onto the upper end of the upper lever 1a.

According to the above configuration, by keeping the spring constant of the anti-vibration rubber 2 low, it is possible to improve the anti-vibration and sound-insulating effect. Since the rubber portion forming the operation input transmission path to 1b is substantially the same, depending on the required characteristics of vibration and sound insulation effects, it may adversely affect the shift feeling when operating the shift lever. In other words, even if the bounce constant is appropriate in terms of vibration and sound insulation characteristics, it may be too low in terms of shift feeling characteristics.In such cases, the vibration isolating rubber when operating the shift lever Upper lever 1a and lower lever 1b according to the deflection of
A soft sense of moderation may occur between the two, giving the driver a sense of discomfort.

[Purpose of the invention]

The purpose of this invention is to provide vibration isolation and
The objective is to satisfy both the requirements for sound insulation characteristics and the requirements for shift feeling characteristics, and to prevent the above-mentioned discomfort when operating the shift lever without impairing the vibration-proofing and sound-insulating effects.

[Structure of the invention]

In the present invention, the function of transmitting the operation input from the upper lever to the lower lever and the vibration-proofing/sound-insulating function are performed by different parts of the vibration-proof rubber, and the rubber hardness of the part that controls the function of transmitting the operation input is hardens. By doing this, it is possible to satisfy the two contradictory required characteristics as mentioned above, and in particular, when operating the shift lever, the part with hardened rubber exerts a stopper effect, so it is not necessary to use the conventional method. I'm glad that the sense of harmony has been resolved.

[Example] Hereinafter, a more specific example of the present invention will be described based on the drawings. However, the same parts as in the conventional example described above are given the same reference numerals.

That is, as shown in FIG. 2, portions of the lower lever 1b corresponding to the upper end 5a and lower end 5b of the vibration isolating rubber 2 are formed to have a large diameter, and the portions corresponding to the large diameter portions 6a and 6b are formed to have a large diameter. The rubber thickness of the anti-vibration rubber 2 is made significantly smaller than other parts, thereby making the upper end 5a and the lower end 5b of the anti-vibration rubber 2 hard, thereby locally increasing their rigidity (spring constant). .

As shown in FIG. 2, in the so-called normal state in which no operating force is applied to the upper lever 1a, the upper and lower ends 5a, 5b of the vibration isolating rubber 2 and the inner circumference of the upper lever 1a are not in contact with each other, and there is a gap between them. This is done so that a predetermined gap exists.

Although the lower lever 1b and the vibration isolating rubber 2 are fixed on their entire circumferential surface by conventional means such as vulcanization adhesion,
The upper lever 1a and the vibration isolating rubber 2 have a large diameter portion 2a,
Only 2b is glued.

According to the above configuration, in the normal state where no operating force is applied to the upper lever 1a, the large diameter portion 2a of the vibration isolating rubber 2,
Only the upper lever 2b is in contact with the upper lever 1a, and therefore, for example, slight vibrations and metallic sounds transmitted from the transmission to the lower lever 1b are absorbed at the contact portion, thereby exerting the original vibration-proofing and sound-insulating effect.

Furthermore, when an operating force is applied to the upper lever 1a, although the entire vibration isolating rubber 2 is bent, its upper end 5a and lower end 5b come into contact with the inner periphery of the upper lever 1a and exert a so-called stopper effect. The vibration isolating rubber 2 does not bend excessively. In other words, by limiting the amount of deflection of the entire vibration isolating rubber 2 due to the stopper effect of the upper end 5a and lower end 5b of the vibration isolating rubber 2, a relatively hard moderation feeling can be obtained when operating the gear shift lever, and the shift feeling can be improved. Becomes good.

〔Effect of the invention〕

As described above in detail, according to the present invention, vibration isolation and
It can satisfy both the required characteristics of the sound insulation effect and the required characteristics of the shift feeling, and the original vibration and sound insulation effects are not impaired, and with an appropriate sense of moderation, it is possible to achieve a good and comfortable feeling. You can feel the shift.

[Brief explanation of drawings]

Figure 1 shows the gear 1a related to Japanese Patent Application No. 57-86755.
...Upper lever 1b...Lower lever 2...Vibration isolating rubber 5a...Upper end 5b...Lower end Tato 2 people

Claims (1)

[Claims] (1) W-shaped (7) A gear shift lever formed by inserting and fixing a lower lever into an upper lever through a substantially cylindrical vibration-proof rubber to elastically connect the two,
Gear shift lever 0 characterized by having higher rubber hardness at the upper and lower ends of the anti-vibration rubber compared to other parts.