JP2591715Y2 - 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 structure for preventing a grooved pin from coming off a rod detent.

[0002]

2. Description of the Related Art FIG. In FIG. 4, a rod detent 12 is provided inside a shift lever 11 so as to be movable in the axial direction of the lever. When the push button 13 provided on the knob of the shift lever 11 is pushed, the rod detent 12 is pushed down by the cam engagement,
When you release your finger from the push button 13, the rod detent 1
2 is returned upward by a return spring 14 composed of a compression coil spring provided below. Rod detent 1
2, a grooved pin 15 is slidably inserted in a right angle direction. The grooved pin 15 is engaged with the detent groove 17 of the plate body 16 provided on the side of the shift lever.
In order to fit the grooved pin 15 and the rod detent 12 loosely, the plate shift lock 18 is extended in a flange shape at a portion facing the grooved pin 15 to prevent the grooved pin 15 from coming off. Further, a guide shift lock plate 19 is fixed to the plate body 16 with a screw 20 in order to prevent the plate shift lock 18 from coming off. FIG.
Is shown. In FIG. 5, a rod detent 22 is inserted into a shift lever 21, the rod detent 22 is pushed down by a push button 23, and is urged upward by a return spring 24 formed of a compression coil spring to return. A grooved pin 25 that passes through the rod detent 22 at a right angle is press-fitted into a hole in the rod detent 22.

[0003]

However, the prior art has the following problems. In the prior art 1, it is necessary to provide a flange of the plate shift lock, a guide shift lock plate, and a screw in order to prevent the grooved pin from coming off because the fitting between the grooved pin and the rod detent is loose. This involves an increase in the number of parts, an increase in man-hours for assembling work, an increase in weight and cost. Further, in the prior art 2, the grooved pin is pressed into the hole of the rod detent, so that the grooved pin does not come off. However, a jig is required for assembling, and it is difficult to disassemble and maintenance work becomes difficult. SUMMARY OF THE INVENTION It is an object of the present invention to provide a shift lever device for an automatic transmission having a grooved pin detachment prevention mechanism which has a small number of parts and is easy to assemble and disassemble.

[0004]

A shift lever device for an automatic transmission according to the present invention for achieving the above object comprises the following devices. That is, a grooved pin is slidably inserted into the rod detent, a grooved pin removal prevention pin is interposed between the rod detent and the return spring, a projection is provided on the grooved pin removal prevention pin, and a groove is formed on the grooved pin to receive the projection. Shift lever device for automatic transmission.

[0005]

In the device according to the present invention, the protrusion of the grooved pin slip prevention pin engages with the groove of the grooved pin and is locked, so that the grooved pin does not come off from the hole of the rod detent. The guide shift lock plate, screw, and flange of the plate shift lock of the prior art 1 can be eliminated only by providing the grooved pin detachment prevention pin, the number of parts can be reduced, and the weight and cost can be reduced. In addition, since the grooved pin is not loosely fitted into the hole of the rod detent and remains loosely fitted, it is easier to assemble and disassemble than conventional technology 2 and is useful for recycling when discarding the product.

[0006]

1 to 3 show a preferred embodiment of the present invention. In FIG. 1, the shift lever 8 of the automatic transmission is shown.
Is rotatable in the vehicle front-rear direction about a shaft 9 fixed to the vehicle body, and in FIG.
Is shifted to any of P, R, D, 2, and L positions. In order to prevent accidental rotation of the shift lever 8,
A grooved pin 1 that rotates together with the shift lever 8 is provided on the shift lever 8 side, the grooved pin 1 is extended through the axially long hole 4a of the guide cylinder 4, and a fixed plate body 5 is provided on the vehicle body side. 5, a detent hole 10 having a detent groove is formed, and the grooved pin 1 is engaged with the detent groove to lock the rotation. When shifting the shift lever 8 from one shift position to another shift position, the grooved pin 1 is pushed down to a portion below the detent hole communicating with the shift direction, and in this state, the shift lever 8 is rotated in the shift direction. Then, the grooved pin 1 is returned upward at a desired position to engage with the detent groove.

To enable the shift operation of the shift lever 8, a rod detent 3 is movably inserted in the shift lever 8 in the axial direction of the shift lever 8. The grooved pin 1 extends in a direction perpendicular to the axial direction of the rod detent 3 and has a hole 3 a formed in the rod detent 3.
Is slidably inserted and moves with the rod detent 3 in the vertical direction. The rod detent 3 is the rod detent No. 1 and rod detent No. 1 2 and the grooved pin 1 has a rod detent No. It is loosely fitted in the second hole 3a. Above the rod detent 3, there is a sleeve that can move up and down together with the rod detent 3, and the upper surface of the sleeve is a cam surface. A push button 7 is provided on the knob at the upper end of the shift lever 8 so as to be able to protrude and retract, and the push button 7 is cam-engaged with the sleeve. When the push button 7 is pushed into the knob, the sleeve, the rod detent 3 and the grooved pin 1 are pushed down, and the engagement between the grooved pin 1 and the detent groove is released. On the other hand, rod detent 3
On the lower side, a return spring 6 composed of a compression coil spring is provided, and the rod detent 3 is constantly urged upward by the return spring 6. Therefore, when the finger is released from the push button 7 and the push is released, the rod detent 3 is lifted upward by the return spring 6, the push button 7 returns to the position where it comes out of the knob, and the grooved pin 1 returns to the upper position. To engage with the detent groove. Up to this point, the conventional structure is applied.

In the embodiment of the present invention, as shown in FIGS. 1 and 2, a rod detent 3 (rod detent N) is used.
o. Between 2) and the return spring 6, which did not previously exist,
A grooved pin slip prevention pin 2 (hereinafter simply referred to as a slip prevention pin) is interposed. The detachment preventing pin 2 has a large-diameter portion 2b having substantially the same diameter as the rod detent 3, a small-diameter portion 2c smaller than the rod detent 3 provided above the large-diameter portion 2b, and a lower portion of the large-diameter portion 2b. It is provided with a small-diameter portion 2d having a smaller diameter than the return spring 6 and a projection 2a projecting further toward the grooved pin 1 from the upper end surface of the small-diameter portion 2c. The upper small-diameter portion 2c extends to the grooved pin 1 by slidably passing through an axial hole 3b formed in the rod detent 3. On the other hand, the grooved pin 1 has a substantially rectangular cross section, and a groove (may be referred to as a recess) 1a is formed on a surface of the grooved pin 1 on the side facing the pin 2 and on a portion corresponding to the projection 2a. ing. When the stopper pin 2 is pressed against the rod detent 3 by the return spring 6, the protrusion 2a at the tip of the small diameter portion 2c of the stopper pin 2 protrudes into the groove 1a of the grooved pin 1 and engages with the grooved pin 1. It is locked in the grooved pin axial direction with respect to the rod detent 3.

Next, the operation will be described. After assembling the grooved pin 1 and the pull-out prevention pin 2, the protrusion 2a and the groove 1a
The grooved pin 1 cannot move in the axial direction of the grooved pin 1 with respect to the rod detent 3, and the grooved pin 1 is disengaged from the rod detent 3. Detachment is prevented. Therefore, there is no need to provide the guide shift lock plate, the screw, and the flange of the plate shift lock as in the prior art 1, and the number of parts is reduced and the weight is reduced.

To assemble the grooved pin 1 and the stopper pin 2, the grooved pin 1 is inserted into the hole 3 of the rod detent 3.
a, and remove the pin 2 from the rod detent 3
If it is assembled by interposing between the spring and the return spring 6, the protrusion 2
The grooved pin 1 is naturally locked by the rod detent 3 by engaging the groove 1a. When it is desired to remove the grooved pin 1 from the rod detent 3, a driver or the like is inserted through the hole 4a of the guide cylinder 4, and the stopper pin 2 is shifted downward from the rod detent 3, thereby disengaging the projection 2a from the groove 1a. Can be done by Therefore, unlike the related art 2, there is no problem that the grooved pin 1 and the rod detent 3 cannot be disassembled due to press-fitting.

[0011]

According to the present invention, the pin for preventing the grooved pin from coming off is provided, and the projection is engaged with the groove provided on the grooved pin. Thus, the number of parts can be reduced, the assembling work can be facilitated, the weight can be reduced, and the cost can be reduced. In addition, since the grooved pin is slidably engaged without being pressed into the rod detent, disassembly becomes easy unlike press fitting.

[Brief description of the drawings]

FIG. 1 is an overall sectional view of a shift lever device of an automatic transmission according to an embodiment of the present invention.

FIG. 2 is a perspective view of a grooved pin and a stopper pin of the device of FIG. 1 and the vicinity thereof;

FIG. 3 is a side view of the device of FIG. 1 in the vicinity of a detent hole.

FIG. 4 is an overall sectional view of a shift lever device of the automatic transmission according to the related art 1.

FIG. 5 is an overall cross-sectional view of a shift lever device of the automatic transmission according to the related art 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Groove pin 1a Groove 2 Groove pin prevention pin 2a Projection 3 Rod detent 6 Return spring 7 Push button 8 Shift lever

Claims (1)

(57) [Scope of request for utility model registration] 1. A grooved pin is slidably inserted into a rod detent, a grooved pin removal prevention pin is interposed between the rod detent and a return spring, a projection is provided on the grooved pin removal prevention pin, and a groove for receiving the projection on the grooved pin. A shift lever device for an automatic transmission, characterized in that a shift lever device is formed.