JP4953657B2 - Shifting operation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shift operation device capable of enhancing sliding property in a push-down direction of a shift lever. <P>SOLUTION: The shift operation device 1 for performing shift operation to a reverse stage by the push-down operation of the shift lever 7 is provided with a support means 5 for pivotably supporting the shift lever 7; a retaining means 3 provided on a transmission case 2 for slidably retaining the support means 5 in the push-down direction; and an absorption means 4 arranged between the support means 5 and the retaining means 3 and capable of absorbing deformation by thermal expansion of the support means 5. The absorption means 4 has a guide means formed in an approximately cylindrical shape and guiding deformation of an inner peripheral surface in a direction of the retaining means 3; and a projection prevention means capable of preventing projection deformation of the inner peripheral surface in a direction of the support means 5 based on the deformation. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a speed change operation device.

Conventionally, as this type of speed change operation device, there has been proposed one in which a shift lever is spherically supported by a resin ball seat slidably fitted to a metal retainer provided on the transmission case side. Yes.
In this speed change operation device, a shift operation to the reverse can be performed by depressing the shift lever via a ball seat.
Japanese Patent Laid-Open No. 2003-118412

  However, in such a speed change operation device, since the ball seat has a larger thermal expansion coefficient than the retainer, the ball seat sticks to the retainer side when used at a high temperature, resulting in poor sliding of the shift lever.

The present invention has been devised in view of the above-described conventional problems, and has an object of improving the slidability of the shift lever in the push-down direction. Claim 1 is directed to the reverse stage by the push-down operation of the shift lever. A shift operation device for performing a shift operation of
Support means for swingably supporting the shift lever;
Holding means provided in a transmission case for holding the support means slidably in the push-down direction;
The holding means is arranged on the outer peripheral surface side and the support means is arranged on the inner peripheral surface side. The holding means is formed in a substantially cylindrical shape, and a plurality of circumferential directions are provided between the outer peripheral surface and the inner peripheral surface. An absorption means in which a space is formed and capable of absorbing deformation due to thermal expansion of the support means ;
With
The absorbing means includes a guiding means for inducing deformation of the inner peripheral surface in the holding means direction, and an inner peripheral surface facing the second partition wall that separates the space portions from each other toward the holding means direction side. It is a means which has the protrusion prevention means which prevents the protrusion deformation | transformation to the said support means direction of the said internal peripheral surface based on the said deformation | transformation by setting it as a concave shape .

Further, according to claim 2, before Symbol guidance means, the holding means the direction of the inner circumferential surface by forming a first partition separating the said inner peripheral surface and the space portion in a shape curved to the holding means directions It is a means for inducing the deformation to.

  According to a third aspect of the present invention, the guide means forms a low-rigidity portion having a lower rigidity than other parts in at least a part of the first partition wall, thereby moving the inner peripheral surface toward the holding means. It is a means for inducing deformation.

Furthermore, claim 4 is the first partition is that the stiffness is smaller than the previous SL second partition.

  A fifth aspect of the present invention is that the absorption means is a means having a larger coefficient of thermal expansion than the support means.

The present invention is a shift operation device that performs a shift operation to the reverse stage by a push-down operation of a shift lever,
Support means for swingably supporting the shift lever;
Holding means provided in a transmission case for holding the support means slidably in the push-down direction;
The holding means is arranged on the outer peripheral surface side and the support means is arranged on the inner peripheral surface side. The holding means is formed in a substantially cylindrical shape, and a plurality of circumferential directions are provided between the outer peripheral surface and the inner peripheral surface. An absorption means in which a space is formed and capable of absorbing deformation due to thermal expansion of the support means ;
With
The absorbing means includes a guiding means for inducing deformation of the inner peripheral surface in the holding means direction, and an inner peripheral surface facing the second partition wall that separates the space portions from each other toward the holding means direction side. And a protrusion preventing means for preventing the inner peripheral surface from projecting and deforming in the direction of the support means due to the concave shape, so that the absorbing means can be deformed due to thermal expansion of the support means. Since it absorbs, the sliding failure with respect to the holding means of a support means can be prevented.
Further, the deformation of the inner peripheral surface of the absorbing means due to thermal expansion is induced in the holding means direction, and even if the inner peripheral surface is deformed in the direction of the supporting means based on the deformation in the holding means direction, it protrudes from the inner peripheral surface. Therefore, the deformation in the direction of the holding means due to the thermal expansion of the support means can be absorbed well. As a result, the slidability in the push-down direction of the shift lever can be improved. Further, it is possible to prevent the deformation of the inner peripheral surface of the absorbing means in the direction of the supporting means with a simple configuration.

The front Symbol induction means induces the deformation of the said holding means the direction of the inner circumferential surface by forming a first partition separating said space portion and the inner peripheral surface in a shape curved to the holding means directions By this means, the inner peripheral surface of the absorbing means can be deformed toward the holding means with a simple configuration.

  Further, the guiding means is a means for guiding the deformation of the inner peripheral surface in the direction of the holding means by forming a low-rigidity portion having a lower rigidity than other portions in at least a part of the first partition wall. By doing so, it is possible to guide the deformation of the inner peripheral surface of the absorbing means toward the holding means more effectively.

Further, the first partition wall, by the stiffness is smaller than the previous SL second partition, This arrangement can be guided to the holding means direction more effectively deformation of the inner circumferential surface of the absorption means.

  In addition, since the absorption means is a means having a larger thermal expansion coefficient than the support means, in this way, the deformation in the direction of the holding means due to the thermal expansion of the support means can be more effectively absorbed. it can. As a result, the slidability in the push-down direction of the shift lever can be improved.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a speed change operation device. The speed change operation device 1 is arranged on the inner periphery of a substantially cylindrical metal retainer 3 having an open upper surface that constitutes a holding means attached to a transmission case 2. The resin ring 4 constituting the absorbing means is fixed to the stepped portion 3a and press-fitted and fixed to the inner peripheral side of the resin ring 4 so as to be slidable in the vertical direction. A resin socket 5 is provided. A spherical engagement portion 5a is formed in the resin socket 5, and the spherical portion 7a of the shift lever 7 is fitted into the spherical engagement portion 5a. Is swingably supported.

The resin socket 5 is always urged upward by a coil spring 6 provided vertically between the retainer 3 and the resin socket 5.
The connecting portion 7 b at the lower end of the shift lever 7 is slidably connected to the striking arm 8, and the striking arm 8 is connected to the striking rod 9.

  In such a structure, when the shift operation is performed to the reverse side, the shift lever 7 is pushed down, and the resin socket 5 slides downward along the inner periphery of the resin ring 4 during the reverse shift operation. However, the resin ring 4 is shown in the perspective view of FIG. 2 and enlarged in plan view of FIG. 3 so that a downward sliding failure does not occur even when the resin socket 5 is expanded under high temperature use. The structure shown in the figure is set.

  The resin ring 4 is formed in a cylindrical shape with a resin having a thermal expansion coefficient larger than that of the resin socket 5, and is provided on the inner peripheral side of the outer peripheral ring portion 14 that is press-fitted and fixed to the inner periphery of the retainer 3 in the circumferential direction. A plurality of second partition walls 15, 15, 15 are formed protruding at intervals, and the second partition wall 15 is recessed in a curved shape toward the outer ring portion 14 on the inner periphery side facing the outer periphery of the resin socket 5. Thus, a protrusion preventing recess 15a is formed, and this protrusion preventing recess 15a forms a protrusion preventing means.

Inner peripheral surface bases 17 and 17 are formed at both ends in the circumferential direction of the respective protrusion preventing recesses 15a so as to project toward the resin socket 5 side, and are continuously bowed from the inner peripheral surface base 17 to the outer peripheral ring portion 14 side. The first partition wall 17a is formed in a curved shape, and the first partition wall 17a is smaller in thickness (diameter direction) than the thickness (circumferential direction) of the second partition wall 15, Further, the length (circumferential direction) of the first partition wall 17a is larger than the length (radial direction) of the second partition wall 15a. That is, the first partition wall 17a is a low-rigidity portion whose rigidity is lower than that of the second partition wall 15, and the first partition wall 17a forms a guiding means.
An inner peripheral surface base portion 17 and a first partition wall 17a which are continuous inside the second partition walls 15 and 15 serve as an inner peripheral surface, and each of the second partition walls 15 and 15 between the first partition wall 17a and the outer peripheral ring portion 14 is provided. A space portion 16 is provided therebetween, and the space portion 16 is formed in a penetrating shape in the vertical direction.

  If the resin ring 4 having such a structure is provided between the inner periphery of the retainer 3 and the outer periphery of the resin socket 5, the resin socket 5 is expanded and deformed toward the retainer 3 in use at a high temperature. This expansion deformation can be satisfactorily absorbed by the resin ring 4.

  That is, the low-stiffness first partition wall 17a curved like an arc has a space 16 and can be easily deformed to the retainer 3 side by thermal expansion. As shown by the solid line in the partial plan view, the first partition wall 17a is strongly bowed due to thermal expansion and is deformed toward the outer ring part 14, but the first partition wall 17a is deformed toward the outer ring part 14 side. Along with the deformation, the inner peripheral surface base 17 receives a pulling force in the circumferential direction. At this time, the protrusion preventing recess 15a formed in a curved shape in the second partition wall 15 is pulled toward the inner peripheral side, and the curved shape is gentle. Thus, the minimum inner diameter of the inner peripheral surface base portion 17 becomes substantially unchanged even when thermal expansion occurs.

  As described above, even if the first partition wall 17a is deformed in the retainer 3 direction, the inner peripheral surface base portion 17 does not protrude from the inner peripheral surface, so that the resin socket 5 is well deformed in the retainer 3 direction due to thermal expansion. Therefore, the resin socket 5 can slide well downward when the shift lever 7 is pushed down even at high temperatures. In addition, since the minimum inner diameter of the inner peripheral surface base portion 17 does not change substantially even when thermal expansion occurs, the clearance between the resin socket 5 and the resin ring 4 is kept substantially constant, and the resin socket 5 is loose with respect to the resin ring 4. Does not occur.

  If the coefficient of thermal expansion of the resin ring 4 is set to be larger than that of the resin socket 5, the deformation of the resin socket 5 toward the retainer 3 due to the thermal expansion of the resin socket 5 can be absorbed more effectively. The slidability in the pressing-down direction of the lever 7 is further improved.

Next, a description will be given of a speed change operating device according to a second embodiment of the present invention.
FIG. 5 is an enlarged plan view of an essential part of the resin ring in the speed change operating device of the second embodiment.
As shown in the drawing, the resin ring 4 in the speed change operating device of the second embodiment is formed by deforming the first partition wall 17a into the inner peripheral surface base 17 side by recessing from the inner peripheral side to the outer peripheral ring 14 side. And the deformation guide recess 15b formed in a recessed shape on the space 16 side of the protrusion preventing recess 15a of the second partition wall 15 is the same as the resin ring 4 in the speed change operating device of the first embodiment. Has a configuration.

  In the resin ring 4 in the speed change operation device of the second embodiment, since the rigidity of the deformation guide recess 17b and the deformation guide recess 15b is low, as shown by the solid line in FIG. The first partition wall 17a bends and expands in the circumferential direction due to expansion from the starting point, and the first partition wall 17a is deformed satisfactorily, so that the inner peripheral surface base portion 17 does not protrude toward the inner peripheral side, and the inner peripheral base portion The minimum inner diameter of 17 is substantially unchanged, and the deformation in the retainer 3 direction due to the thermal expansion of the resin socket 5 can be satisfactorily absorbed by the resin ring 4, and the slidability in the push-down direction of the shift lever 7 is improved. It will be improved.

  In the speed change operation device of each embodiment, the resin ring 4 is formed of a resin having a thermal expansion coefficient larger than that of the resin socket 5. It does n’t matter what you do.

  As mentioned above, although embodiment of this invention was described using the Example, this invention is not limited to such an Example, In the range which does not deviate from the summary of this invention, it can implement with a various form. Of course.

It is a schematic longitudinal cross-sectional block diagram of a speed change operation apparatus. It is a perspective block diagram which provided the resin ring which is an absorption means between the retainer and the resin socket. FIG. 3 is an enlarged configuration diagram of FIG. 2. It is a principal part plane enlarged block diagram which shows the deformation | transformation state by the thermal expansion of a resin ring. It is a principal part plane enlarged block diagram which shows the modification of a resin ring. FIG. 6 is an enlarged plan view of a state in which the resin ring of FIG.

DESCRIPTION OF SYMBOLS 1 Shifting operation apparatus 2 Transmission case 3 Retainer (holding means)
4 Resin ring (absorption means)
5 Resin socket (support means)
7 Shift lever 7a Spherical surface portion 8 Striking arm 9 Strike rod 14 Outer ring portion 15 Second partition 15a Protrusion prevention recess 15b Deformation guide recess 16 Space portion 17 Inner peripheral surface base portion 17a First partition 17b Deformation guide recess

Claims (5)

A shift operation device that performs a shift operation to a reverse stage by depressing a shift lever,
Support means for swingably supporting the shift lever;
Holding means provided in a transmission case for holding the support means slidably in the push-down direction;
The holding means is arranged on the outer peripheral surface side and the support means is arranged on the inner peripheral surface side. The holding means is formed in a substantially cylindrical shape, and a plurality of circumferential directions are provided between the outer peripheral surface and the inner peripheral surface. An absorption means in which a space is formed and capable of absorbing deformation due to thermal expansion of the support means ;
With
The absorbing means includes a guiding means for inducing deformation of the inner peripheral surface in the holding means direction, and an inner peripheral surface facing the second partition wall that separates the space portions from each other toward the holding means direction side. A shift operation device, which is a means having a protrusion prevention means for preventing a protrusion deformation of the inner peripheral surface in the direction of the support means based on the deformation by forming a concave shape . Before Symbol guidance means, means for directing the deformation to the holding means the direction of the inner circumferential surface by forming a first partition separating said space portion and the inner peripheral surface in a shape curved to the holding means directions The shift operation device according to claim 1, wherein The guiding means is a means for guiding the deformation of the inner peripheral surface in the direction of the holding means by forming a low-rigidity portion having a rigidity lower than that of the other part in at least a part of the first partition wall. The speed change operation device according to claim 2 . The first partition wall, before Symbol speed change device of the rigidity is small claim 2 or 3, wherein than the second partition wall. The transmission operating device according to any one of claims 1 to 4 , wherein the absorbing means is a means having a larger coefficient of thermal expansion than the support means.

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