JPS625380Y2 - - Google Patents

Description

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

This kind of floor shift lever has engine,
Vibrations occurring in the motor vehicle's power unit, which consists of a clutch and a transmission, are transmitted directly through the extension housing and the shift lever retainer. As a result, the shift lever vibrates either integrally or relative to the retainer, causing problems such as abnormal noise due to mutual rattling and radiated noise inside the vehicle due to the vibration of the shift lever itself. As a countermeasure against this problem, for example, a means for floating the shift lever by interposing a vibration isolating material such as rubber between the spherical part of the shift lever and a shift lever retainer that supports the spherical part of the shift lever has been implemented.

However, with this measure, if the vibration transmitted from the retainer side to the shift lever side increases,
Phenomenon in which the shift lever vibrates violently in the vertical direction due to the amplitude of the shift lever becoming larger than the amplitude of the retainer, or the phase of the mutual vibration frequencies being significantly shifted (chatter vibration phenomenon)
This vibration causes extreme discomfort to the driver.

In view of these circumstances, this invention aims to provide a support structure for a floor shift lever that can effectively suppress the vertical vibration of the shift lever described above without adversely affecting its operation feeling. That is the purpose.

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

In Fig. 1, which shows the structure of a floor shift type shift lever support part, reference numeral 1 indicates a shift lever retainer, which is connected to an extension housing (none of which is shown) that is continuously arranged in the transmission case. It is attached to the top opening of the A vibration isolating member 2 made of rubber or the like having a curved spherical seat 3 is incorporated into this retainer, and the spherical part 6 of the shift lever 5 is attached to the spherical seat 3 in the commonly known shift lever. Select operations are supported. As is clear from FIG. 3, the lower end of this shift lever 5 is connected to a shift and select lever shaft 8 by a pin joint 7.

A cap 9 is fixed to the upper opening of the retainer 1 by bolts 12, as is generally well known. A spring 1 is connected between a seat 10 slidably disposed inside the cap 9 and the upper surface of the spherical portion 6 of the shift lever 5.
1 is provided, and this spherical portion 6 is always pressed against the spherical seat 3 of the vibration isolating member 2. Note that the space between the retainer 1 and the shift lever 5 is covered by a dust boot 13.

As is clear from FIGS. 2 and 3, the shift lever 5 has a structure in which the spherical portion 6 and the lever main body 5A are formed separately. That is, this lever main body 5A has a spherical surface portion 6.
The lever body 5A is inserted into a center hole 19 which is vertically penetrated in the center of the lever body 5A, and a second
As is clear from the figure, a small gap S is set. Furthermore, E-rings 14 as locking members are attached to the outer periphery of the lever main body 5A that protrudes upward and downward from the center hole 19 of the spherical section 6. Disc springs 15 are interposed between the respective end faces. As a result, the lever main body 5A is elastically supported by the spherical portion 6 through the disc springs 15 described above so as to be able to move slightly in the vertical direction.
Furthermore, a hole 16 is formed in a portion of the lever main body 5A located within the center hole 19 of the spherical portion 6 in a direction perpendicular to its axis. As is clear from FIGS. 3 and 4, an elastic body 17 made of a material such as rubber and friction materials 18 disposed on both sides of the elastic body 17 are incorporated into the hole 16. . In other words, these friction materials 18 are assembled with a preload applied to them by the elasticity of the elastic body 17, and are always pressed against the inner peripheral surface of the center hole 19 in the spherical portion 6.

When the vibration generated by the power unit of the automobile is transmitted to the shift lever retainer 1 through the extension housing, the retainer 1 is elastically supported (floating supported) by the vibration isolating member 2 and the spring 11. Some shift levers 5 may experience severe vibration in the vertical direction due to the causes explained earlier, namely, the amplitude of the shift lever 5 becomes larger than the amplitude of the retainer 1, or the phase shift between the mutual vibration frequencies becomes large. (chattering vibration). In this embodiment, this vibration appears as vertical vibration of the lever body 5A with respect to the spherical portion 6 of the shift lever 5. However, in this embodiment, an elastic body 17 is provided between the lever body 5A and the inner peripheral surface of the center hole 19 of the spherical portion 6.
Since the friction material 18 is disposed with a preload applied to it, a frictional force is applied to the vibration of the lever body 5A against the spherical portion 6. This frictional force suppresses the amplitude of the lever body 5A to at least the same level as the amplitude of the spherical part 6 (on the retainer 1 side), or if there is a phase shift between the mutual vibration frequencies, this shift is used as energy due to friction. It can cause a loss. As a result, the lever body 5
A: In other words, chatter vibration of the shift lever 5 can be effectively suppressed.

Next, different embodiments of this invention are shown in Figures 5 to 7.
This will be explained using figures. In this description, parts that are considered to have the same or equivalent configuration as those of the embodiment shown in FIGS. 1 to 4 above will be denoted by the same reference numerals in the drawings, and redundant explanation will be omitted.

First, in the embodiment shown in FIG. 5, the friction material 18 is pressed against the outer peripheral surface of the lever body 5A from the spherical portion 6 side of the shift lever 5 with a predetermined preload. That is, in this embodiment, a pair of holes 20 are formed that penetrate from the outer periphery of the spherical portion 6 to the center hole 19 thereof, and a friction material 18 that contacts the outer periphery of the lever body 5A is provided in these holes 20, and a preload is applied to this friction material 18. The elastic body 17 that provides this and the synthetic resin member 21 that closes the hole 20 are inserted in this order.

In the embodiment shown in FIGS. 6 and 7, a cylindrical friction material 118 is interposed between the center hole 19 of the spherical portion 6 of the shift lever 5 and the outer periphery of the lever body 5A. As is clear from FIG. 7, this friction material 118 is divided into two parts in the circumferential direction, and an elastic body 117 such as rubber is provided between these parts. Due to the elasticity of the elastic body 117, the friction material 118 is pressed against the inner periphery of the center hole 19 of the spherical portion 6 with a predetermined preload.
Further, in this embodiment, a pin 22 perpendicular to the axis of the lever body 5A is press-fitted into a portion of the lever body 5A located within the center hole 19 of the spherical portion 6. Both ends of this pin 22 are engaged with elongated holes 23 formed in the spherical part 6 to prevent the spherical part 6 and the lever main body 5A from rotating against each other while allowing vertical movement thereof. are doing.

In addition, in this embodiment, the shift lever spherical part 6 is prevented from rotating (positioned) with respect to the retainer 1 along with the rotation of the spherical part 6 and the lever main body 5A. That is, each groove 26 formed on both sides of the spherical portion 6 is engaged with a shift lever support pin 27 fixed to the retainer 1 side. As a result, the shift lever 5 is
Despite being divided into the retainer A and the spherical portion 6, the position of the retainer 1 is restricted in the same manner as the generally known types. Along with this, the shift lever 5 and the aforementioned shift and select lever shaft 8 are connected by a spherical joint instead of the pin joint 7, that is, the small spherical surface portion 24 at the lower end of the shift lever 5 is connected to the shift and select lever shaft (not shown). A fitted type of connection to the housing 25 may be employed.

As described above, the present invention divides the shift lever into its spherical part and the lever main body, and inserts the lever main body into the hole formed through the center of the spherical part, and inserts the lever main body from the hole into the upper and lower parts. A locking member is fixed to the outer periphery of the lever body protruding from the top and bottom of the spherical part with a slight gap between the upper and lower end surfaces of the spherical part. The shifter is floatingly supported with respect to the shift lever retainer by disposing a friction material with a preload applied by an elastic body to apply a frictional force to the relative vertical movement of the shifter. When the lever receives vibrations from the retainer side, most of the vibrations, especially in the vertical direction of the shift lever, are absorbed as vibrations of the spherical part, which is formed separately from the lever body, and The vibration of the lever body can be absorbed by the frictional force of the friction material. As a result, the vibration of the lever body is effectively suppressed, and the advantage of eliminating the discomfort caused by the vibration of the shift lever is exhibited. Moreover, in this invention, the friction material for obtaining the above-mentioned frictional force is provided in a part that does not undergo a relatively large displacement with respect to the shift and select operation of the shift lever, so this friction material improves the operation feeling of the shift lever. It is possible to avoid problems that may have a negative impact on the system.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a sectional view showing a floor shift type shift lever support part, FIG. 2 is an enlarged sectional view of the main part of FIG. 1, and FIG. The figure is a sectional view showing only the shift lever and its main related components as seen from the right side of Fig. 1, Fig. 4 is a sectional view taken along the - line in Fig. 3, and Fig.
The figure is a cross-sectional view of the second embodiment in correspondence with FIG. 3, FIG. 6 is a cross-sectional view of the third embodiment in correspondence with FIG. 1, and FIG. - line sectional view. 1... Shift lever retainer, 5... Shift lever, 6... Spherical part, 18, 118, 218...
Friction material, 17, 117, 217...elastic body.

Claims (1)

[Scope of utility model registration request] This is a support structure for a floor shift lever, in which a spherical part of a floor shift type shift lever is supported via a vibration isolating member to enable shift and select operations with respect to a shift lever retainer. The lever body is inserted into a hole formed vertically through the center of this spherical part, and a spherical part is formed on the outer periphery of the lever body that protrudes vertically from this hole. The locking members are fixed with a small distance between them and the upper and lower end surfaces, and a frictional force is applied between the inner periphery of the hole in the spherical part and the lever body to prevent their relative vertical movement. 1. A support structure for a floor shift lever in an automobile transmission, characterized in that a friction material is provided with a preload applied by an elastic body.