JPH0858419A - Support structure for shift lever - Google Patents

Abstract

PURPOSE: To surely support a bracket for a shift lever device in either of the select direction or the shift direction and superiorly hold sound insulation characteristics. CONSTITUTION: A support structure of a shift lever device is so formed that a shift lever is supported by a bracket so as to rotatably operate in the select direction along the car width direction and a shift direction along the front/rear direction of a car body, and the bracket is attached to a floor face via a bush 1 consisting of an elastic material. The bush 1 is interposed between the bracket and the floor face in such a state that rigidity of a point 9a of the bush 1 compressed by rocking in the select direction of the bracket is higher than that of a point compressed by the rocking in the shift direction of the bracket.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for a shift lever device for operating a manual transmission.

[0002]

2. Description of the Related Art As is well known, a manual transmission is constructed so that a gear shift operation is performed by a shift lever. Generally, a floor shift type shift lever operates a shift lever in a select direction along the vehicle width direction, and at a predetermined position thereof, operates the shift lever in a shift direction along the front-rear direction of the vehicle body so that a predetermined shift speed is achieved. Is configured to set. The shift lever is usually supported by a bracket as a holding body fixed to the floor surface so that the shift lever can be rotated in two directions, the select direction and the shift direction. The shift lever is connected to the manual transmission by a push-pull cable or a rod.

The floor surface to which the bracket is attached is composed of a flat plate member having a large area, whereas the transmission transmits the power from the engine, and therefore the bracket is connected to the bracket from the engine. May be transmitted and the floor surface may vibrate accordingly. In such a case, the floor surface may act as a so-called vibrating plate to generate noise. Therefore, conventionally, a bush made of an elastic material such as a vibration-proof rubber is interposed between the bracket and the floor surface, and the floor is The transmission of vibrations to the surface is blocked.

In order to block the transmission of vibration, it is preferable to use a soft bush, but since this bush supports the bracket, when it is made soft, the bracket compresses the bush along with the shift operation. As a result, the reaction force against the operating force of the shift lever cannot be sufficiently generated, and in such a case, the so-called shift feeling (moderation feeling) is impaired. On the contrary, if a bush having high rigidity is used, the vibration is transmitted to the floor surface, so that the so-called sound insulation characteristic is deteriorated.

As described above, the bushes are required to have contradictory characteristics. Therefore, for example, in the device disclosed in Japanese Utility Model Laid-Open No. 2-56725, a rubber insulator in which a disc spring is embedded is used, and the spring is operated at the beginning of the shift operation. The constant is increased so that the spring constant is reduced when the shift operation is completed to interrupt the transmission of vibration and improve the feeling of operation.

[0006]

As described above, the bushes have been variously improved so as to satisfy the contradictory requirements of the vibration isolation characteristics and the retention of moderation as described above. Therefore, it is not possible to satisfy both the feeling of operating the shift lever in the select direction and the feeling of operating the shift lever in the shift direction.

That is, the bracket in the floor shift type shift lever device has a small size in the vehicle width direction and a large size in the front-rear direction of the vehicle, so that when the shift lever is operated in the select direction. The load on the bush is large because the gap between the bushes is short, whereas the load on the bush when the shift lever is operated in the shift direction has a wide gap between the bushes in the front-rear direction of the vehicle. Therefore, the load becomes small. As a result, when the shift lever is operated in the select direction, the bush is likely to bend, and a sufficient reaction force for the operation of the shift lever is not generated, resulting in the inconvenience that the operation feeling deteriorates.

The present invention has been made in view of the above circumstances, and provides a support structure capable of improving the operation feeling of the shift lever in either the select direction or the shift direction. That is the purpose.

[0009]

In order to achieve the above object, the invention described in claim 1 rotates a shift lever in a select direction along a vehicle width direction and a shift direction along a longitudinal direction of a vehicle body. In a support structure of a shift lever device, which is movably supported by a holding body and is attached to a floor surface via a bush made of an elastic material, in the bush, the holding body in the select direction is provided. The bush is interposed between the holding body and the floor surface in a state where the rigidity of the portion compressed by the rocking is higher than the rigidity of the portion compressed by the rocking of the holding body in the shift direction. It is characterized by being present.

According to a second aspect of the present invention, the shift lever is supported by a holding body so as to be rotatable in a select direction along the vehicle width direction and a shift direction along the front-rear direction of the vehicle body.
In a support structure of a shift lever device in which the holding body is attached to a floor surface, a supporting surface protruding upward is erected on the floor surface, and a mounting surface facing the supporting surface hangs down on the holding body. And a through hole penetrating in the select direction is formed in the mounting surface, and a cylindrical groove is formed in the through hole on the outer peripheral surface to fit the mounting surface. Is inserted, and the holding body is fixed to the support surface in a state in which the bush is compressed by the screw means inserted along the central axis of the bush.

[0011]

In the invention described in claim 1, the holding body holding the shift lever is attached to the floor surface with the bush interposed. The bush is
When the holder swings in the select direction, it is difficult to deform, whereas when the holder swings in the shift direction, it easily deforms. Therefore, when the shift lever is operated in the select direction. The bush bears a sufficient reaction force with respect to the operating force, so that the holding body is prevented from swinging and the operational feeling is prevented from being deteriorated. Such a characteristic occurs only when the shift lever is operated in the select direction, and the rigidity of the bush as a whole is not particularly high, so that the transmission of vibration can be favorably prevented.

Further, in the invention described in claim 2,
The mounting surface of the holder facing the support surface is sandwiched by the bushes from both the left and right sides, and the bushes are present on the inner peripheral side of the through hole. Since this bush is arranged with its central axis directed in the select direction and is compressed and deformed by the screw means,
When the holder tries to swing in the select direction, a compressive load and a shear load act on the bush. On the other hand, when the holder tries to swing in the shift direction, only the shear load acts on the bush. Therefore, the reaction force generated by the bushes is greater when the holder swings in the select direction than when it swings in the shift direction, and as a result, even if the distance between the bushes in the select direction is short, The reaction force against the operation of the lever in the select direction is sufficiently increased to prevent the holding body from swinging. Therefore, swinging of the holding body is prevented in both the select direction and the shift direction, so that a good operational feeling can be obtained. Further, since the rigidity of the bush is not particularly increased, it is possible to excellently prevent the transmission of vibration.

[0013]

EXAMPLES The present invention will now be described in detail based on examples. FIG. 1 is a perspective view showing one of the bushes 1 used in the support structure of the present invention, and FIG. 2 is a perspective view of a shift device 2 fixed to a floor surface (not shown) by using the bush 1. Is. In this shift device 2, the shift lever 3 is mounted on a bracket 4 which is a holding body, in a select direction along the vehicle width direction (direction along line X-X in FIG. 2) and a shift direction along the longitudinal direction of the vehicle body (Y in FIG. 2). In order to rotatably support the shift lever 3 in a direction (along the −Y line) and to transmit the operation of the shift lever 3 to a transmission (not shown), 2
A book push-pull cable 5 is connected to the shift lever 3. The bracket 4 has a substantially rectangular shape whose projection surface on the floor surface is long in the front-rear direction of the vehicle. The front and rear four positions of the bracket 1 and the collar 6 and the bolt 7 and the weld nut attached to the rear surface of the floor (see FIG. It is fixed by (not shown).

The bush 1 is made of an elastic material such as rubber, and its shape is such that flange portions 9 are formed at both ends of a cylindrical portion 8 as shown in FIG. Two of the flange portions 9 that face each other in the diametrical direction
The portion is a thick portion 9a which is thicker than the other portions. The thick portion 9a is compressed more than other portions in the mounted state, and as a result, the so-called initial elastic force in the mounted state is increased. It is arranged so as to line up in the XX line direction in FIGS. 1 and 2.
Therefore, the thick portion 9a of the outer peripheral surface of the cylindrical portion 8 is
A protrusion 8a having a rectangular cross section at a position 90 degrees out of phase with
Are formed along the axial direction. Bush 1 above
3A and 3B are shown in FIG. 3A, and FIG. 3A shows the select direction (XX in FIG. 1).
A cross-sectional shape cut along a plane along the line direction) is shown, and (B) shows a cross-sectional shape cut along a plane along the shift direction (Y-Y line direction in FIG. 1).

A portion of the bracket 4 where the bush 1 is arranged is formed in a substantially flat plate shape, and a mounting hole 10 into which the bush 1 is fitted is formed. As shown in the shape of FIG. 4, the mounting hole 10 is formed of a round hole portion 10a into which the cylindrical portion 8 is fitted and two notches 10b into which the protruding portion 8a is fitted. And these two notch parts 10b are arrange | positioned in the position which opposes in the shift direction (the YY line direction of FIG. 4).

The bush 1 is attached to the bracket 4 with its cylindrical portion 8 fitted in the attachment hole 10.
In this state, it is fixed to the floor surface by the bolt 7.
In that case, the thick wall portion 9a formed on each flange portion 9 is sandwiched between the bracket 4 and the floor surface, or sandwiched between the flange of the collar 6 and the bracket 4, and compressed. The amount is larger than the other parts. That is, in the attached state, the initial compression amount (elastic force) applied to the thick wall portion 9a is larger than the other portions, and the rigidity in this portion is high.

Therefore, when the shift lever 3 is operated in the select direction, the bracket 4 tends to incline in the select direction, but a reaction force is generated in the thick portion 9a against the load, and the reaction by the thick portion 9a occurs. The force is increased due to the large initial compression amount, and as a result, the inclination of the bracket 4 in the select direction is prevented. On the other hand, shift lever 3
Is operated in the shift direction, a load that causes an inclination in the shift direction acts on the bracket 4, but the bushes 1 in the shift direction have a large interval, and thus the bush 1 does not move.
The load acting on itself becomes small, and therefore, the bracket 4 can be sufficiently supported by the elastic force generated at the portion of the flange portion 9 of the bush 1 other than the thick portion 9a, and the bracket 4 does not tilt.

That is, according to the bush 1 described above, a sufficient reaction force is generated against the load associated with the operation of the shift lever 3 in either the select direction or the shift direction, and the bracket 4 is tilted or swung. It is possible to prevent the shift lever 3 from being operated and improve the operation feeling of the shift lever 3.
Further, the entire bush 1 can be formed of a conventionally used elastic material such as rubber, and the rigidity of the entire bush 1 does not need to be particularly high. Therefore, transmission of vibration from the bracket 4 to the floor surface can be prevented. You can

FIGS. 5 and 6 are views showing other embodiments of the present invention. In the examples shown in these drawings, the bracket is provided with a thick portion for partially increasing the initial compression amount of the bush. It was formed. That is, in the peripheral portion of the mounting hole 10 of the bracket 4, in the select direction (X- in FIG. 5).
Thick portions 4a are formed at two locations facing each other in the X-ray direction). On the other hand, the flange portion 9 of the bush 1 is formed in a simple flat plate shape, and no protrusion is provided on the outer periphery of the cylindrical portion 8.

Therefore, in the structure shown in FIGS. 5 and 6, two portions of the flange portion 9 of the bush 1 that face the center of the flange portion 9 in the select direction are formed by the thick portion 4a formed on the bracket 4 so that the other portions are not formed. The part is compressed more than the part, and the initial compression amount (initial elastic force) in that part becomes large. That is, the reaction force that acts when the bracket 4 leans in the select direction is larger than the reaction force that acts when the bracket 4 leans in the shift direction. Therefore, even if the distance between the bushes 1 in the select direction is shorter than that in the shift direction, the bushes 1 generate a reaction force sufficiently large with respect to the load associated with the operation of the shift lever 3 in the select direction. The inclination of 4 is favorably prevented in both the select direction and the shift direction, and the operation feeling of the shift lever 3 is not impaired. Further, in the configuration shown in FIGS. 5 and 6, since it is not necessary to give the bush 1 directivity, it is not necessary to provide the above-mentioned protrusion 8a and the notch 10b,
Good manufacturability and mountability.

In each of the above-described embodiments, by providing the bush or the bracket with the thick portion, the initial compression amount of the bush in the select direction is increased and the supporting rigidity in that direction is increased. Is not limited to each of the above embodiments, for example, as shown in FIG. 7, a thick portion 11a is formed on the washer 11, and the thick portion 11a is arranged on the bush so as to be aligned in the select direction. In addition, the structure may be such that it is tightened with bolts and nuts. Even with such a configuration, the thick portion 11a of the washer 11 can largely compress two portions of the bush in the select direction to increase the initial compression amount and increase the support rigidity in the select direction. Therefore,
Even if the distance between the bushes is short in the select direction, the support rigidity of the bushes can be increased, so that the bracket 4 can be prevented from tilting in the select direction, and the feeling of operation of the shift lever can be favorably maintained.

As is apparent from the above-described embodiments, in the present invention, since the support rigidity of the bush in the mounted state may be increased in the select direction, the structure of the bush 1 may be replaced by the structure of each of the above-described embodiments. Of these, the material of the part that is arranged along the select direction is made of one that has greater elastic force than the other parts,
This may increase the support rigidity in the select direction. In this case, since the bush 1 itself has a directivity, it is preferable to additionally provide a means for determining the directivity at the time of attachment (for example, means such as the above-mentioned protrusion and cutout).

Still another embodiment of the present invention will be described with reference to FIGS. 8 and 9. In the embodiment shown here, the bolts and nuts, which are fixing means, are set in the select direction. That is, a pair of front and rear floor supports (supporting surfaces) 20 facing each other in the select direction are erected on the floor surface, and the bracket 4 is
Mounting surfaces 21 located outside the floor supports 20 and facing the floor supports 20 are formed so as to hang down. In addition, each floor support 20 is formed with a bolt hole 22 penetrating in the select direction, and among the opening ends of the bolt hole 22, the floor support 20.
A weld nut 23 is attached to the opposing surface side of each other. Further, a through hole 25 into which the bush 24 is fitted is formed in each of the mounting surfaces 21 of the bracket 4.

The bush 24 is formed of an elastic material such as rubber into a substantially columnar shape, and the mounting surface 2 of the bracket 4 is located at the central portion in the axial direction of the bush 24.
An annular groove 26 into which 1 is fitted is formed. The bush 24 is inserted into the through hole 25 of the mounting surface 21, the mounting surface 21 is fitted into the annular groove 26, and the collar 28 is inserted into the through hole 27 along the central axis.
In this state, the bolt 29 is inserted into the collar 28, and the bolt 29 is inserted into the through hole 22 of the floor support 20 and screwed into the weld nut 23. Therefore, as shown in FIG. 9, the mounting surface 21 of the bracket 4 has an annular groove 26 of the bush 24.
It is held in a fitted state.

When a load accompanying the operation in the select direction is applied to the bracket 4, the mounting surface 21 tends to move in the vertical direction and the horizontal direction in FIG.
A shearing force along the vertical direction and a compressive force in the horizontal direction in FIG. On the other hand, when a load is applied to the bracket 4 in the shift direction, the bush 24 is arranged in the select direction, so that the bush 24 receives only the shearing force along the vertical direction in FIG. 9. Will work. Therefore, the reaction force due to the elastic force of the bushes 24 becomes larger in the select direction than the reaction force against the load in the shift direction. As a result, even if the interval between the bushes 24 is short in the select direction,
Since the elastic reaction force that can be generated by the bush 24 itself is large, it is possible to favorably prevent the bracket 4 from swinging or tilting in the select direction.

That is, also in the structures shown in FIGS. 8 and 9, the support rigidity in the select direction can be increased to prevent the bracket 4 from tilting. Further, since the rigidity of the bush 4 itself is not particularly large, it is possible to effectively prevent the transmission of vibration from the bracket 4 via the floor support 20.

Note that the present invention is not limited to the above-mentioned embodiments, and the present invention is that the support rigidity of the bush in the mounted state in the selected direction is high, and therefore the elasticity is high. It is also possible to insert another material such as metal or synthetic resin in advance by insert molding or the like in a part of the portion of the bush made of material that is arranged side by side in the select direction. Further, the shift lever device according to the present invention may have a structure other than the structure in which it is fixed to the floor surface at four places as shown in each of the above-mentioned embodiments, and the shape of the bracket is other than the shape shown in each of the above-mentioned embodiments. It may be one.

[0028]

As described above, according to the present invention,
Since the support rigidity by the bush interposed between the holder such as a bracket and the floor surface is large in the select direction, the shift lever should not The load associated with the operation can be sufficiently supported by the bush, and thus the holder such as the bracket can be sufficiently and reliably supported without rocking or tilting without increasing the rigidity of the entire bush. . Therefore, according to the present invention, the operational feeling of the shift lever can be prevented from being deteriorated, and at the same time, the transmission of vibration to the floor surface can be favorably prevented and the sound insulation characteristic can be enhanced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a bush that can be used in the present invention.

FIG. 2 is a perspective view showing an example of a supporting structure of a shift lever device using the bush shown in FIG.

3A and 3B are views showing cross-sectional shapes of the bush shown in FIG. 1 along a select direction and a shift direction, respectively.

FIG. 4 is a view showing a shape of a mounting hole into which the bush shown in FIG. 1 is fitted.

FIG. 5 is a schematic perspective view for explaining another embodiment of the present invention.

6 is a view showing a cross section taken along line XX and a cross section taken along line YY of FIG. 5, respectively.

FIG. 7 is a perspective view showing an example of a washer that can be used in still another embodiment of the present invention.

FIG. 8 is a schematic exploded view for explaining another embodiment of the present invention.

9 is a cross-sectional view showing one of the attachment points in the embodiment shown in FIG.

[Explanation of symbols]

 1 Bush 2 Shift device 3 Shift lever 4 Bracket 4a Thick wall 7 Bolt 9 Flange 9a Thick wall 11 Washer 11a Thick wall 20 Floor support 21 Mounting surface 24 Bush

Claims (2)

[Claims] 1. A shift lever is supported by a holder so as to be rotatable in a select direction along a vehicle width direction and a shift direction along a front-rear direction of a vehicle body, and the holder is interposed by a bush made of an elastic material. In the support structure of the shift lever device mounted on the floor surface, the rigidity of the portion of the bush compressed by the swinging of the holding body in the select direction is determined by the swinging of the holding body in the shift direction. A structure for supporting a shift lever device, characterized in that the bush is interposed between the holding body and the floor surface in a state of being higher in rigidity than a portion compressed by. 2. A shift lever in which a shift lever is rotatably supported by a holder in a select direction along a vehicle width direction and a shift direction along a front-rear direction of a vehicle body, and the holder is attached to a floor surface. In the support structure of the apparatus, a support surface projecting upward is erected on the floor surface, and a mounting surface facing the support surface is formed on the holding body, and the select surface is further formed on the mounting surface. A bush made of an elastic material having a cylindrical shape and a groove for fitting the mounting surface is formed on the outer peripheral surface of the bush is inserted into the through hole. A support structure for a shift lever device, wherein the holding body is fixed to a support surface in a state in which the bush is compressed by a screw means inserted along.