JPS625379Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a floor shift type shift lever support device for an automobile transmission.

Generally, vibrations from a power unit consisting of an engine, clutch, and transmission are transmitted to the shift lever through an extension housing and a shift lever retainer. This vibration of the shift lever causes radiated noise in the vehicle interior, or transmits vibration to the body side, causing abnormal noise in the vehicle interior. Conventional countermeasures to this problem include interposing a vibration-absorbing material such as rubber between the extension housing and the shift lever retainer, or dividing the shift lever into two in the longitudinal direction and placing vibration-absorbing material at the joint between them. Examples include things that are mediated. However, attempting to suppress vibration transmission by using a vibration damping material such as rubber has some influence on the operation feeling of the shift lever. Therefore, when consideration is given to problems related to the operation feeling and other factors such as the durability of the above-mentioned cushioning material, the reality is that sufficient vibration damping effects cannot be achieved due to these limitations.

In view of such conventional circumstances, the present invention aims to provide a shift lever support device that can effectively prevent shift lever vibration and associated noise while minimizing adverse effects on shift operation feeling. , that is its purpose.

Next, the configuration of this invention will be explained in detail according to an embodiment shown in the drawings.

In Figures 1 and 2 showing the structure of the floor shift type shift lever support part, the reference numeral 1 is
shows a shift lever retainer, which is mounted on the top surface of an extension housing (none of which is shown) that is continuous with the transmission case. As clearly shown in FIG. 2, this retainer 1 has a rectangular (polygonal) fitting portion 2 that is open on its upper surface. A shift lever support 3 formed independently of the retainer 1 is assembled into the fitting portion 2. That is, this support body 3 is formed to have an outer shape corresponding to the shape (square shape) of the above-mentioned fitting part 2, and has a spherical seat 3a that spherically supports the large spherical part 6 of the shift lever 5 formed therein. .

On the other hand, a cap 9 is fixed to the upper opening of the retainer 1 with bolts 12, as is generally well known. A coil spring 11 is provided between a seat 10 that is slidably disposed inside the cap 9 and the upper surface of the large spherical portion 6 of the shift lever 5, and the large spherical portion 6 is always supported by the shift lever. It is pressed against the spherical seat portion 3a of the body 3. The small spherical surface part 8 at the tip of the shift lever 5 shown in FIG. 1 is fitted into a lever housing of a shift and select lever shaft (not shown) so as to transmit the operation of the shift lever 5. It is. Also,
The upper opening of the retainer 1 is covered by a dust boot 13.

Now, in order to position (stop rotation) the shift lever 5, the shift lever support pins 4, which are engaged with the grooves 7 formed on both sides of the large spherical surface 6, are moved from the retainer 1 as described above. It is fixed to the independently formed support 3 described above. Moreover, a vibration damping material 14 made of an elastic material such as rubber is interposed between the support body 3 and the inner periphery of the fitting portion 2 of the retainer 1. As a result, the shift lever support 3 and the support pin 4 are held in a floating state with respect to the retainer 1 side together with the shift lever 5 as an integral part.

With this configuration, vibrations transmitted from the power unit of the automobile to the shift lever retainer 1 through the extension housing are insulated at the vibration damping member 14, and transmission of the vibrations to the shift lever 5 is suppressed. That is, vibrations from the retainer 1 side to the shift lever 5, which conventionally used the shift lever support pin 4 as a transmission path, are effectively blocked. Since the above-mentioned cushioning material 14 is disposed at the fulcrum portion of the shift lever 5 for shifting and selecting operations, for example, the shift lever 5 may be divided in its longitudinal direction and a cushioning material such as rubber may be inserted between them. Compared to the case where the shift lever is combined with the shift lever, the negative effect of the cushioning material on the operation of the shift lever (deterioration of operation feeling) is less. In addition, since a relatively large area can be secured between the retainer 1 and the shift lever support 3 where the above-mentioned cushioning material 14 is provided, this cushioning material 14
There is a large degree of freedom in the shape, arrangement means, material, etc., and it is possible to select the configuration that has the least influence on the operating feeling of the shift lever 5. Regarding the operation feeling of the shift lever 5, it is important to set the elasticity of the buffer material 14 harder in the select operation direction than in the shift operation direction to maintain a sense of moderation in the select operation. For this purpose, the thickness or material of the buffer material 14 may be changed in the shift operation direction and the select operation direction.

Note that a sheet-shaped vibration buffer material 15 made of an elastic material is interposed between the retainer 1 and the cap 9 to absorb vibration transmission between the retainer 1 and the cap 9. For the same purpose, retainer 1
As is clear from FIG. 3, another cushioning material 16 is interposed between the cap 9 and the bolt 12 which fixes the cap 9 to the cap 9. Further, as is clear from FIG. 4, a cushioning material 17 is provided on the inner peripheral edge of the center hole of the seat 10 through which the shift lever 5 passes, in order to soften the contact between the seat 10 and the shift lever 5. ing. Further, the sheet 10 is generally made of metal, but in order to improve the vibration insulation function from the cap 9 side with respect to the shift lever 5, the sheet 10 is made of a synthetic resin material, and in addition, a grease reservoir is provided on the contact surface with the cap 9. If formed, the friction with the cap 9 will also be reduced and the above-mentioned vibration insulation effect will be enhanced.

Next, the embodiment shown in FIGS. 5 to 7 will be described. This embodiment shows a modification for preventing the shift lever support 3 from rotating relative to the fitting portion 2 of the shift lever retainer 1. That is, in this embodiment, the flange portion 1 is formed to protrude from the upper end of the shift lever support 3 using the bolt 12 that fixes the cap 9 to the retainer 1.
8 is fixed to the retainer 1, thereby preventing the support 3 from rotating relative to the retainer 1.
Therefore, the fitting part 2 of the retainer 1 and the support body 3
The outer shape may be circular as shown in FIG. In accordance with such a change in structure, in this embodiment, a portion 14A of the vibration damping material 14 is interposed between the upper end surface of the retainer 1 and the flange portion 18, and a portion 14A of the vibration damping material 14 is interposed between the flange portion 18 and the cap 9. A vibration damping material 15A is interposed therebetween. In addition,
As is clear from FIG. 7, a portion of this buffer material 15A is also located between the flange portion 18 and the bolt 12, and functions to isolate vibrations therebetween.

In the embodiment shown in FIG. 8, the shift lever support 3
A cylindrical stopper 1 extending downward at the center of the lower surface of the
9 is integrally formed. This stopper 19 comes into contact with the inner surface of the retainer 1 when an excessive force is applied to the support 3 during operation of the shift lever 5, etc., and the support 3 tilts more than necessary with respect to the retainer 1. This is to prevent this. As a result, the operation feeling of the shift lever 5 can be maintained favorably, and early deterioration of the buffer material 14 due to excessive compression can be prevented.

In addition, in each of the embodiments shown in FIGS. 5 to 8 above, parts that are considered to have the same or equivalent configuration as the embodiment shown in FIGS. 1 to 4 will be designated by the same reference numerals in the drawings. Duplicate explanations have been omitted.

As described above, the present invention has developed a shift lever retainer that integrates a shift lever support body that supports a floor shift type shift lever on a spherical surface to enable shifting and selection operations, and a shift lever support pin that regulates the position of this shift lever as an integral part. The shift lever support is constructed separately from the shift lever retainer, and a vibration damping material is interposed between the inner periphery of the fitting portion and the outer periphery of the shift lever support. As a result, the shift lever, which is spherically supported by the shift lever support and whose position is regulated by the support pin, is completely floating with respect to the shift lever retainer together with the shift lever support. ), and the vibrations transmitted from the vehicle's power unit to the shift lever retainer can be almost completely suppressed from being transmitted to the shift lever. Abnormal noise inside the car can be reduced. Moreover, by providing a vibration damping material around the outer periphery of the shift lever support, which is the operating fulcrum of the shift lever, the present invention has been shown to have relatively little negative effect on the operating feeling of the shift lever due to the use of this damping material. It also has an effective effect.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and Fig. 1 is a cross-sectional view showing the structure of a floor shift type shift lever support part, and Fig. 2 is a cross-sectional view taken along the - line when Fig. 1 is considered as a complete view. Figure 3 is an enlarged cross-sectional view of the fixed part between the shift lever retainer and the cap, Figure 4 is a cross-sectional view of the spring seat alone, and Figure 5 is a cross-sectional view of the second embodiment. 1
6 is a cross-sectional view taken along the - line when FIG. 5 is considered as a complete diagram, and FIG. 7 is a sectional view showing this second embodiment in correspondence with FIG. 3. The enlarged sectional view, FIG. 8, is a sectional view showing the third embodiment in correspondence with the left half of FIG. 1...Shift lever retainer, 3...Shift lever support, 4...Shift lever support pin, 5...
...Shift lever, 6...Large spherical part, 14-17,
15A...Vibration buffer material.

Claims (1)

[Scope of utility model registration request] A shift lever support body that spherically supports the large spherical part of a floor shift type shift lever so that it can be operated for shifting and selection, and a shift lever support pin that regulates the position of this shift lever are separated from the shift lever retainer as an integral part. At the same time, this shift lever support was assembled to the fitting portion of the upper surface opening of the shift lever retainer with a vibration damping material interposed between the inner periphery of the fitting portion and the outer periphery of the shift lever support. A floor shift lever support device characterized by: