JP2563430Y2 - Shift lever device for automatic transmission - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift lever device for an automatic transmission for a vehicle, and more particularly to a shift lever device having a simplified structure of a shift lever supporting mechanism.

[0002]

2. Description of the Related Art FIG. 7 shows an example of a conventional shift lever device for an automatic transmission. In FIG. 7, reference numeral 1 denotes a plate body fixed to the body side of an automobile. A shift lever 2 is supported on the plate body 1.
A cylindrical fulcrum 3 is attached to the lower end of the shift lever 2 by welding. The fulcrum 3 is disposed between the pair of plate bodies 1. A shaft 4 is held at a lower portion of the plate body 1.

The shift lever 2 is swingably held by the plate body 1 via a shaft 4 inserted through a shaft hole 3a of the fulcrum 3. Between the inner peripheral surface of the shaft hole 3 a of the fulcrum 3 and the outer peripheral surface of the shaft 4, in order to prevent rattling due to a gap and generation of abnormal noise when the shift lever 2 swings, a resin-made material is used. A bush 5 is interposed. Both ends of the shaft 4 are supported by support holes 1 a formed in the plate body 1.

[0004] On one side of the shaft 4, a collar portion 4a for retaining is formed. The other end of the shaft 4 is formed with a tapered portion 1b for facilitating insertion into the support hole 1a and the shaft hole 3a. A holding plate 6 for pressing the flange 4 a side of the shaft 4 is attached to the plate body 1 with screws 7. The shaft 4 is prevented from moving in the axial direction by the flange 4 a and the holding plate 6.

In the shift lever device of FIG. 7, a self-lubricating resin bush 5 is interposed between the inner peripheral surface of the shaft hole 3a of the fulcrum 3 and the outer peripheral surface of the shaft 4.
The movement of the shift lever 3 when the shift lever 3 swings becomes smooth, and generation of abnormal noise at the time of swinging is also prevented.

[0006]

However, the shift lever device shown in FIG. 7 has the following problems.

(1) In the apparatus shown in FIG. 7, a presser plate 6 is required to prevent the shaft 4 from coming off the plate main body 1, so that the number of parts increases and the presser plate 6 is connected to the plate main body by screws 7. 1 requires an assembling work for attaching to 1. As a result, there is a problem that the assembly cost is increased.

(2) In the apparatus shown in FIG. 7, a flange 5a is formed on the bush 5 in order to avoid direct sliding contact between the support 3 and the plate body 1. Therefore, the bush 5 is divided into two parts, and each bush 5 is set on each side of the support part 3. Therefore, when the support portion 3 of the shift lever 2 is arranged between the plate main bodies 1, the bush 5
May fall off from the support portion 3, and there is a problem that the assembling property is poor. Further, if the bush 5 is not securely set on the support portion 3, there is a problem that the bush 5 and other members interfere at the time of assembly, and the bush 5 is damaged.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a shift lever device for an automatic transmission, which can simplify the structure of a shift lever support mechanism and improve the assemblability of the shift lever.

[0010]

A shift lever device for an automatic transmission according to the present invention which achieves this object is as follows. A fulcrum having a shaft hole is provided at the lower end of the shift lever, and both ends of the shaft inserted into the shaft hole of the fulcrum are
A shift lever device for an automatic transmission, wherein the shaft is supported by an inner peripheral surface of a support hole of the plate main body and the shift lever is swingably held on the plate main body via the shaft. And a flange portion bulging outward in the radial direction is formed at one end of the shaft. At the other end of the shaft, a support hole of the plate body of the shaft and a shaft hole of the fulcrum portion are formed. At the time of insertion, the shaft is elastically deformed inward in the radial direction, and is displaced radially outward when the shaft comes out of the support hole to form a retaining means for engaging with the side wall surface of the plate body.
A shift lever device for an automatic transmission, wherein a flat surface parallel to the axial direction of the shaft is formed, and the support hole has a shape that matches the cross-sectional shape of the shaft.

[0011]

In the shift lever device of the automatic transmission constructed as described above, since the shaft is formed of a member having self-lubricating properties, a bush made of resin as in the prior art is not required. Further, since the retaining means is formed on the shaft itself, the retaining of the shaft from the plate body is prevented without using other members.

The retaining means is elastically deformed in the radial direction when the shaft is inserted into the support hole of the plate main body and the shaft hole of the fulcrum, and is self-elastic outwardly in the radial direction when exiting the support hole. Restore state. When the retaining means is displaced radially outward and restored, the retaining means engages with the side wall surface of the plate body. In this state, movement in one direction in the axial direction of the shaft is prevented by the flange portion, and movement in the other direction in the axial direction of the shaft is prevented by the retaining means. Therefore, the shaft is prevented from moving in any of the axial directions, and the shaft is reliably prevented from dropping from the plate body.

As described above, the shaft is inserted into the support hole of the plate body and the shaft hole of the fulcrum, and when the insertion operation is completed, the axial movement of the shaft can be automatically prevented. Therefore, there is no need for a separate retaining member as in the conventional device, and the assemblability of the shift lever can be significantly improved.

Since the shaft is prevented from moving around the axis by the engagement between the flat surface and the inner peripheral surface of the support hole, rotation of the shaft due to the shift operation of the shift lever is prevented. Therefore, the shaft does not come into sliding contact with the plate body during the shift operation of the shift lever, and wear of the shaft is prevented.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a shift lever device for an automatic transmission according to the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 show an embodiment of the present invention. In the figure, reference numeral 21 denotes a plate main body made of a thermoplastic resin. The plate body 21
It is fixed to the body side of an automobile (not shown). A shift lever 31 for switching the speed ratio of an automatic transmission (not shown) is attached to the plate body 21.

The shift lever 31 has a shift lever main body portion 32, a positioning lower portion 33, and a fulcrum portion 34. The positioning lower part 33 and the fulcrum part 34 are made of a metal member. The positioning lower part 33 and the fulcrum part 34 are attached so as to be orthogonal. Positioning lower part 33 and fulcrum part 34
Are integrally formed. The positioning lower part 33 is formed in a shaft shape, and the fulcrum part 34 is formed in a cylindrical shape.
The shaft hole 34 a of the fulcrum 34 extends in a direction perpendicular to the axial direction of the positioning lower part 33. On both sides of the fulcrum 34,
The above-mentioned plate bodies 21 are respectively located. A shaft 22 is arranged below the plate body 21.

The two ends of the shaft 22 are
1 supported. The fulcrum portion 34 of the shift lever 21 is supported by the shaft 22 inserted into the shaft hole 34a of the fulcrum portion 34. Thereby, the positioning lower part 33 of the shift lever 31 can swing with respect to the plate body 21.

The positioning lower portion 33 has a holding hole 33a extending in the axial direction. An elongated hole 33b penetrating through the holding hole 33a is formed in the outer peripheral portion of the positioning lower portion 33. A detent rod 35 is swingably inserted into the holding hole 33a. A retaining pin 36 is attached to the detent rod 35, and the retaining pin 36 is inserted so as to be able to engage with the elongated hole 33b.

A compression coil spring 37 is housed below the holding hole 33a. Dint rod 35
Is urged upward by a compression coil spring 37. The detent rod 35 has a retaining pin 36
Can be moved in the axial direction by a distance that moves within the range of the long hole 33b. A grouped pin 38 that can be engaged with a detent hole 21 a formed in the plate body 21 is attached to an upper portion of the detent rod 35.

One of the positioning lower parts 33 has a lever 3
9 are provided. The lever 39 is located at the lower part 3 of the positioning.
3 and integrally formed. A connection pin 40 to which a wire connected to an automatic transmission (not shown) is connected is attached to one of the lever portions 39. A holder 41 is attached to the other of the positioning lower part 33. Holder 41
Are formed integrally with the positioning lower part 33. Holder 4
In 1, a positioning mechanism 45 that contacts the corrugated moderating groove 42 formed on the plate body 21 side is movably held.

Above the positioning lower part 33 of the shift lever 31, a shift lever main body part 32 is located. The shift lever main body 32 is made of, for example, a metal pipe. The upper end of the positioning lower portion 33 and the lower end of the shift lever main body 32 are mechanically connected.

A rod 46 extending in the axial direction is provided in the shift lever main body 32. At the top of the shift lever 31, an operation button 47 that can be moved in and out in the horizontal direction is provided. One end of the operation button 47 comes into contact with an inclined surface of an inclination knob 46 a provided at an upper end of the rod 46. The lower end of the rod 46 is connected to the detailed rod 35 by screwing.

The detent holes 21a formed in the plate body 21 have a plurality of engaging steps for positioning the shift lever at each position. Grouped pin 3
The detent rod 35 to which the pin 8 is attached is urged upward by a compression coil spring 37 so that the grouped pin 38 is pressed against the step of the detent hole 21a.

When the shift position of the shift lever is changed during operation of the vehicle, an operation button 47 provided on the head of the shift lever 31 is pressed.
And the downward movement of the grouped pin 38 releases the engagement between the grouped pin 38 and the detent hole 21a. In a state where the engagement between the grouped pin 38 and the detent hole 21a is released, the shift lever 31 is shifted to a predetermined position by the driver of the vehicle.

When the pressing of the operation push button 47 is released, the grouped pin 38 is pressed to a predetermined position of the detent hole 21a by the compression coil spring 37, and the grouped pin 38 and the detent hole 21a are engaged. It is.

The shaft 22 for swingably supporting the shift lever 31 is made of a self-lubricating synthetic resin. Both ends of the shaft 22 are
Are supported by the support holes 24 formed in the holes. A flange 25 bulging radially outward is formed on one side of the shaft 22. At the radial center of the shaft 22,
A hollow portion 26 extending in the axial direction is formed.

The other end of the shaft 22 has a retaining means 2
7 are formed. Tip 27a of retaining means 27
Is formed with a tapered surface 27b that tapers toward the front. The central portion of the retaining means 27 is formed in a thin portion 27c. At the end of the thin portion 27c,
A step 27d connected to the tapered surface 27b is formed.

The retaining means 27 is elastically deformed inward in the radial direction when the support hole 24 of the plate body 21 and the fulcrum 34 are inserted into the shaft hole 34a, and the shaft 22 is
When the vehicle exits from the position 4, it is restored outward in the radial direction by its own elastic force. In a state in which the retaining means 27 is restored outward in the radial direction, the step 2 of the retaining means 27
7d engages with the side wall surface 21b of the plate body 21.

The shaft 22 is integrally formed by injection molding. As shown in FIG. 4, the shaft 22 has a circular cross section, and two portions are formed on the flat surface 28. Each flat surface 28 is located on the side in which the shift lever 31 swings. The shape of the support hole 24 of the plate main body 21 matches the cross-sectional shape of the shaft 22, and when the shaft 22 is inserted into the support hole 24,
The movement of the shaft 22 around the axis is prevented.

Next, the operation of this embodiment will be described. When assembling the shift lever 31 to the plate body 21, the fulcrum 34 of the shift lever 31 is positioned between the left and right plate bodies 21 and the shaft hole 34a of the fulcrum 34
And the support hole 24 of the plate body 21 are aligned. When the alignment between the shaft hole 34a and the support hole 24 is completed, the support hole 24 and the shaft hole 34a are
The insertion of the shaft 22 toward is started.

The retaining means 27 located at the tip of the shaft 22 is first inserted into the support hole 24 of one plate body 21. Here, the retaining means 27 of the shaft 22
Is formed on the tapered surface 27b, so that as the shaft 22 is pushed into the support hole 24, the tip portion 27a of the retaining means 27 is elastically deformed inward in the radial direction by a wedge effect.

Further, when the shaft 22 is pushed in,
As shown in FIG. 2, the retaining member 27 reaches the shaft hole 34a of the fulcrum portion 34 in a state where the thin portion 27c is elastically deformed. When the insertion of the shaft 22 is continued in this state, the retaining means 27 reaches the support hole 24 of the other plate body 21, and when the insertion of the shaft 22 is completed, the retaining means 27 comes out of the support hole 24.

When the retaining means 27 has come out of the support hole 24, the distal end portion 27a of the retaining means 27 is displaced radially outward by self-elasticity and returns to its original state. In a state where the retaining means 27 is restored to the original shape,
As shown in FIG. 1, the step 27d of the retaining means 27 and the side wall surface 21b of the other plate body 21 are engaged, and the movement of the shaft 22 in the axial direction A is prevented.

The shaft 22 has a support hole 24 and a shaft hole 34.
In the state where the shaft 22 is completely inserted, the flange portion 25 formed on one side of the shaft 22 abuts against the side wall surface 21c of the one plate main body 21, so that the movement of the shaft 22 in the axial direction B is prevented. . Thus, the shaft 22
When the insertion of the shaft 22 is completed, the movement of the shaft 22 in the directions A and B is automatically prevented by the restoration of the retaining means 27, and the shaft 22 is reliably prevented from falling off from the plate body 21. Since the shape of the support hole 24 matches the cross-sectional shape of the shaft 22 on which the flat surface 28 is formed, the flat surface 28 is engaged with the inner peripheral surface of the support hole 24 around the axis, Movement of the shaft 22 around the axis associated with the shift operation of the shift lever 31 is prevented. Therefore, at the time of the shift operation of the shift lever 31, the shaft 22 does not slidably contact the plate main body 21, and the wear of the shaft 22 can be prevented.

In the present embodiment, since the shaft 22 is an oil-impregnated resin and has self-lubricating properties, the conventional bush is not required, and the problem of the bush falling off during assembly is also solved. Therefore, assemblability of the shift lever 31 can be remarkably improved as compared with the related art.

In this embodiment, an oil-impregnated resin is used as a member of the shaft 22. However, the member forming the shaft 22 is not limited to this, and a metal or the like having self-lubricating properties may be used. Similar effects can be obtained.

[0038]

According to the present invention, the following effects can be obtained. (1) One of the shafts inserted into the shaft hole at the fulcrum of the shift lever is provided with a flange portion bulging in the radial direction. When the shaft is inserted into the plate, it is elastically deformed inward in the radial direction and is displaced radially outward when the shaft comes out of the support hole to form a retaining means for engaging with the side wall surface of the plate body. When the operation is completed, the axial movement of the shaft can be automatically stopped. Therefore, it is possible to reliably prevent the shaft from falling off the plate body without using another retaining member. Thus, the structure of the shift lever support mechanism is simplified, the number of parts to be assembled can be reduced as compared with the conventional device, and the ease of assembling the shift lever can be improved.

(2) Since the shaft is made of a member having self-lubricating properties, even if the fulcrum of the shift lever is made of metal, the conventional bush becomes unnecessary and the bush can be eliminated. Therefore, there is no problem that the bush falls off during assembly as in the conventional device. As described above, by eliminating the bush, it is possible to reduce the number of parts to be assembled in the same manner as described above, and to improve the assemblability of the shift lever.

(3) A flat surface parallel to the axial direction of the shaft is formed on the shaft, and the support hole has a shape that matches the cross-sectional shape of the shaft. Sliding contact can be avoided, and wear of the shaft can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing a state when a shaft is completely inserted when a shift lever device of an automatic transmission according to an embodiment of the present invention is assembled.

FIG. 2 is a sectional view of a main part showing a shaft inserted state in the apparatus of FIG. 1;

FIG. 3 is a sectional view of a shaft in the apparatus of FIG. 1;

FIG. 4 is a sectional view taken along line CC of FIG. 3;

FIG. 5 is a side view of the device of FIG. 1;

FIG. 6 is an overall sectional view of the apparatus of FIG. 1;

FIG. 7 is a sectional view of a main part of a shift lever device of a conventional automatic transmission.

[Description of Signs] 21 Plate body 22 Shaft 24 Support hole 25 Flange 27 Retaining means 28 Flat surface 31 Shift lever 34 Support point 34a Shaft hole

Claims (1)

(57) [Scope of request for utility model registration] A shift lever provided with a fulcrum having a shaft hole at a lower end thereof, wherein both ends of the shaft inserted into the shaft hole of the fulcrum are supported by an inner peripheral surface of a support hole of the plate body; In a shift lever device for an automatic transmission in which a lever is swingably held on a plate body via the shaft, the shaft is formed of a member having self-lubricating properties, and one end of the shaft is provided with a radially outward portion. When the shaft is inserted into the support hole of the plate body and the shaft hole of the fulcrum portion, the shaft is elastically deformed radially inward at the other end of the shaft. Forming a retaining means which is displaced radially outward to engage with the side wall surface of the plate body when exiting from the shaft, forms a flat surface on the shaft parallel to the axial direction of the shaft, and forms the support hole. Shaft A shift lever device for an automatic transmission, wherein the shift lever device has a shape that matches a cross-sectional shape.