JPH08296720A - Shift lever device for automatic transmission - Google Patents

Abstract

PURPOSE: To reduce a frictional resistance between a moderation mechanism and an upper base in shifting a shift lever, and increase durability of the upper base against wear. CONSTITUTION: A roller 84 rotatable only in the longitudinal direction of a vehicle is provided on a shift lever 30, and pressed against the inclined surface 76 of a cam part 75 formed on an upper base 26 by ah energizing means 88. Also, when the shift lever 30 is shifted in the longitudinal direction of the vehicle, because the roller 84 rolls on the inclined surface 76, a frictional resistance between the roller and the inclined surface 76 can be reduced, and a wear of the upper base 26 due to friction can be suppressed.

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 of an automobile, and more particularly to a structure of a gate type shift lever device capable of shifting the shift lever in the vehicle longitudinal direction and the vehicle width direction.

[0002]

2. Description of the Related Art A shift lever device for an automatic transmission includes a straight type shift lever device in which the shift lever can shift only in the vehicle front-rear direction and a gate type shift lever in which the shift lever can shift in the vehicle front-rear direction and the vehicle width direction. There is a lever device. Unlike the straight type shift lever device, the gate type shift lever device has an advantage that it is not necessary to press the shift button during the shift operation.

FIG. 6 shows an example of a conventional gate type shift lever device. As shown in FIG. 6, the shift lever 1 can be positioned in the P, R, N, D, 3, 2, and L ranges, respectively. In the conventional device, a feeling of moderation (positioning feeling) when shifting the shift lever to each range
In order to bring out, the moderation mechanism shown in FIG. 7 is provided.
In FIG. 7, a holder case 2 is attached to the outer peripheral surface of the shift lever 1. In the holder case 2, a moderation pin 3 made of iron is held slidably in the vertical direction.
An upper base 7 made of synthetic resin is arranged above the moderation pin 3. A cam portion 8 having an inclined surface 9 is formed on the lower surface side of the upper base 7. Moderation pin 3
Is formed in a spherical shape.

A spring 10 for pressing the moderation pin 3 against the inclined surface 9 of the cam portion 8 is housed in the bottom of the holder case 2. The cam portion 8 extends in the swinging direction of the shift lever 1. When the shift lever 1 shifts, the moderation pin 3 moves in the shift direction while slidingly contacting the inclined surface 9. The shift lever 1 comes into close contact with the detent portion 12 of the upper base 7 when the moderation pin 3 presses the inclined surface 9. The cam portion 8 is formed with a recess (not shown) into which the moderation pin 3 enters when the shift lever 1 is positioned in each range. Therefore, at the time of the shift operation of the shift lever 1, the moderation pin 3 enters the recess, so that an appropriate moderation feeling can be obtained.

[0005]

However, the gate type shift lever device shown in FIG. 7 has the following problems. During the shift operation of the shift lever 1, the frictional resistance due to the sliding contact between the top of the moderation pin 3 and the inclined surface 9 of the cam 8 is large, and the operation feeling of the shift lever 1 is deteriorated. Since the upper base 7 on which the cam portion 8 is formed is made of synthetic resin, the upper base 7 is easily worn by sliding contact with the moderation pin 3 and has a problem in durability.

An object of the present invention is to reduce the frictional resistance between the moderation mechanism and the upper base during the shift operation of the shift lever, and to improve the durability of the upper base against abrasion, thereby providing a shift lever device for automatic transmission. To provide.

[0007]

The shift lever device for an automatic transmission according to the present invention which achieves this object is as follows. (1) A shift lever attached to the lower base so as to be swingable in the vehicle front-rear direction and the vehicle width direction and transmitting a movement in the vehicle front-rear direction to a transmission; and a shift lever fixed to the lower base so that the shift lever can be positioned in each range. An upper base provided with a detent portion, a cam portion formed on a lower surface of the upper base so as to extend in a swinging direction of the shift lever, and having a slanted surface extending obliquely upward with respect to the shift lever, and provided on the shift lever. A roller that is rotatable only in the vehicle front-rear direction, and a biasing unit that presses the roller toward the inclined surface of the cam portion to bring the shift lever into close contact with the detent portion of the upper base. Shift lever device for automatic transmission. (2) The automatic transmission according to claim 1, wherein the upper base is formed with a concave portion which engages with the roller and positions the shift lever in the vehicle width direction when the shift lever is positioned in a specific range where the shift lever does not come into close contact with the detent portion. Shift lever device.

[0008]

In the shift lever device for an automatic transmission of the above (1), since the roller is pressed against the inclined surface of the cam portion by the biasing means, an outward force acts on the roller by the inclined surface,
The shift lever provided with the roller also moves outward. Therefore, the shift lever comes into close contact with the detent portion of the upper base, and the shift lever is positioned in the vehicle width direction. Since the roller is provided with a roller that can rotate only in the vehicle front-rear direction, the roller rolls on the cam portion of the upper base during a shift operation of the shift lever in the vehicle front-rear direction. That is, since the roller rolls on the inclined surface of the cam portion, the friction between the roller and the inclined surface becomes rolling friction, and the frictional resistance becomes significantly smaller than the conventional sliding friction. Therefore, the operating force for shifting the shift lever in the vehicle front-rear direction can be small, and the operation feeling is improved. Further, since the frictional resistance between the roller and the inclined surface is reduced, the wear of the upper base is suppressed and the durability of the upper base is improved. In the shift lever device for an automatic transmission according to the above (2), when the shift lever is positioned in a specific range that does not closely contact the detent portion,
Since the roller engages with the recess of the upper base, the shift lever can be positioned in the vehicle width direction. Therefore, in a specific range, without depending on the detent part,
The shift lever can be positioned.

[0009]

1 to 5 show a shift lever device for an automatic transmission according to an embodiment of the present invention. In FIG. 2, reference numeral 20 denotes a lower base fixed to the vehicle body (not shown) side. The lower base 20 is formed with a support hole 23 into which a shaft 22 to which a connecting lever 21 is attached is inserted. The connecting lever 21 is swingable around the shaft 22 in the vehicle front-rear direction. The lower end of the connecting lever 21 is connected to a vehicle transmission (not shown) via a rod (not shown). Immediately above the lower base 20 is an upper base 2 made of synthetic resin.
6 are arranged. A leg portion of the upper base 26 has a nut 25 that is screwed with a screw 24 provided on the lower base 20.
It is fastened to the lower base 20 by.

A shift lever 30 is connected to a shaft 22 of a connecting lever 21 which is swingably supported by the lower base 20. The lower end 31 of the shift lever 30 has an inverted U shape.
It is formed in a character shape and straddles the shaft 22.
The lower end portion 31 is connected to the shaft 22 via a connecting pin (not shown) that penetrates the shaft 22. The shift lever 30 has a rod 32 extending upward from a lower end portion 31. The rod 32 has a knob 33 at the top. A plate-shaped arm portion 34 that horizontally extends in the front-rear direction of the vehicle is formed near the lower end portion 31 where the rod 32 is fixed. At the tip of the arm portion 34, a U-shaped first
Engaging portion 35 is formed. A boss portion 36 that extends horizontally in the vehicle width direction is formed at a position adjacent to the first engaging portion 35 of the lower end portion 31.

The shift lever 30 is swingable around the shaft 22 in the vehicle front-rear direction (arrow X direction). The movement of the shift lever 30 in the vehicle front-rear direction is transmitted to the connecting lever 21 via the shaft 22. The shift lever 30 can swing in the vehicle width direction (arrow Y direction) about a connecting pin (not shown) that penetrates the shaft 22. The movement of the shift lever 30 in the vehicle width direction is not transmitted to the shaft portion 22 and the connecting lever 21. At the top of the upper base 26, a stepped elongated hole 28 through which the rod 32 of the shift lever 30 is inserted is formed. A detent plate 40 as a detent portion is attached to the top surface of the upper base 26. On the detent plate 40, a stepped positioning step portion 41 similar to the elongated hole 28 is formed.

The shift lever 30 can be positioned by the detent plate 40 in each of the P range, R range, N range, D range, 3 range, 2 range, and L range. The P range is used when the vehicle is parked and parked, and the R range is used when the vehicle moves backward. The N range is in a neutral state, and the rotational driving force of the engine is not transmitted to the wheels. The D range is a drive range, which is 1 depending on the depression amount of an accelerator pedal (not shown).
Up to four speeds are automatically selected as a gear ratio. The 3 range is fixedly used in the range of 1 to 3 speed of the D range, and the 2 range is fixedly used in the range of 1 to 2 speed of the D range.

On the outer periphery of the upper base 26, a mounting pedestal 46 extending in the front-rear direction of the vehicle is formed. The solenoid 50 and the position detection switch 52 are integrally fixed to the mounting base 46. The position detection switch 52 is mounted on the solenoid 50 in an overlapping manner, and the solenoid 50 is fastened to the mounting base 46 with screws or the like.
The movement of the shift lever 30 is locked by a shift lock mechanism (not shown) when the shift lever 30 is in the P range, so that the shift operation to another range cannot be performed unless a brake pedal (not shown) is depressed. ing.
The solenoid 50 is excited when the brake pedal (not shown) is depressed while the shift lever 30 is in the P range, and the shift lock of the shift lever 30 is released.

A shaft 60 extending upward is formed on an outer surface of a corner of the upper base 26. An L-shaped switch drive link 61 is supported on the shaft 60 so as to be swingable in the horizontal direction. The switch drive link 61 has a shaft 6
Fulcrum portion 62 fitted to 0 and 2 extending from the fulcrum portion 62
It has one arm 63, 64. One arm 63
A cam surface 65 that can contact the boss portion 36 of the shift lever 30 is formed at the end portion of the. A U-shaped second engaging portion 66 capable of engaging with the holder 55 of the position detection switch 52 is formed at the end of the other arm 64. The holder 55 is also engageable with the first engaging portion 35 of the shift lever 30. The upper part of the upper base 26 is covered with an upper housing 70. The upper housing 70 is fixed to the upper base 26 by engaging the engaging piece 71 with the engaging portion 72 of the upper base 26.

The switch drive link 61 is covered with an upper housing 70. The switch drive link 61 is urged by a spring 74 arranged on the outer periphery of the fulcrum portion 62 in a direction in which the arm 63 approaches the shift lever 30 side. Holder 5 for position detection switch 52
The upper part of 5 is inserted into a V-shaped guide hole 53a formed in the case 53, and the holder 55 is inserted into the guide hole 53a.
It is designed to move horizontally along a. The position detection switch 52 has a function of detecting that the shift lever 30 is in the P range and also of detecting that the shift lever 30 is in the 3 range.

On the lower surface of the upper base 26, there is formed a cam portion 75 protruding downward and extending in the swinging direction of the shift lever 30. That is, the cam portion 75 extends along the peripheral edge on one side of the stepped elongated hole 28. The surface of the cam portion 75 on the side opposite to the elongated hole 28 side is an inclined surface 76 extending obliquely upward.
Is formed. The inclined surface 76 is formed over the entire length of the cam portion 75. As shown in FIGS. 1 and 4, a moderation mechanism 80 is provided at a position adjacent to the lower end portion 31 of the shift lever 30. The moderation mechanism 80 is
Holder case 81, slider 82, pin 83, roller 8
4, the spring 88 and the like. Holder case 81
Is integrally formed with the lower end portion 31 of the shift lever 30. The holder case 81 has an open top. A slider 82 is held in the holder case 80 so as to be vertically slidable. A hole 85 into which a pin 83 extending in the horizontal direction is inserted is formed in the upper portion of the slider 82.
An E-ring 86 is attached to one end of the pin 83 to prevent it from coming off. A roller 84 made of synthetic resin is rotatably held on the pin 83.

The roller 84 is formed in substantially the same shape as the abacus ball. That is, the right and left sides of the roller 84 are formed into a truncated cone, and the cross-sectional shape of the outer diameter portion where the outer diameter is maximum is arcuate. The pin 83 holding the roller 84 is arranged so as to extend in the horizontal direction and so as to extend in the direction perpendicular to the vehicle front-rear direction. As a result, the roller 84 is adapted to rotate only in the vehicle front-rear direction. It is desirable to use the roller 84 having the same hardness as the upper base 26 in order to suppress wear. Although the roller 84 is supported by the slider 82 via the pin 83, the roller 84 may be directly supported by the slider 82 by a snap fit structure utilizing elastic deformation of the slider 82 without using the pin 83. A spring 88 as an urging means is housed in the lower part of the holder case 81. The spring 88 is
It has a function of pressing the roller 84 against the inclined surface 76 of the cam portion 75 via the slider 82.

The cam portion 75 of the upper base 26 is formed with a recess 90 for providing a moderation feeling when the shift lever 30 is operated for shifting. The recess 90 has P, R, N, D,
They are formed in the 3, 2, and L ranges, respectively. The shift lever 30 swings only in the vehicle width direction during a shift operation from the D range to the 3 range and during a shift operation from the 3 range to the D range. The shift lever 30 does not adhere to the detent plate 40 on the lower surface of the upper base 26. D
A recess 91 is formed which engages with the roller 84 to position the shift lever 30 in the vehicle width direction when the shift lever 30 is positioned in the range. Therefore, the recess 91 of the D range and the recess 90 of the third range are formed side by side in the vehicle width direction, as shown in FIG. On the other hand, P, R, N, 3,
2. The recesses 90 of the L range are formed in a row in the vehicle front-rear direction at a predetermined interval.

Since the movement of the shift lever 30 in the vehicle front-rear direction is transmitted to a transmission (not shown) via a rod (not shown), the shift lever 30 can be positioned in each range by a moderation mechanism on the transmission side. Therefore, it is not always necessary to provide the above-described depression 90 with a sense of moderation in the vehicle longitudinal direction. On the other hand, since the movement of the shift lever 30 in the vehicle width direction is not transmitted to the transmission, it is necessary to position the shift lever 30 reliably in the vehicle width direction. In the present embodiment, the roller 88 is pressed against the inclined surface 76 of the cam portion 75 by the spring 88 to exert an outward force on the roller 84, whereby the rod 32 of the shift lever 30 is positioned to the positioning step portion 41 of the detent plate 40. Is in close contact with. Accordingly, the shift lever 30 is positioned in the vehicle width direction by contacting the detent plate 40 in each range except the D range. In the D range, as described above, the shift lever 30 is positioned in the vehicle width direction by the engagement of the roller 84 and the recess 91.

Next, the operation of the above-described shift lever device for an automatic transmission will be described. When starting the vehicle, the solenoid 50 is excited by depressing a brake pedal (not shown), and the shift lock of the shift lever 30 is released. When shifting the shift lever 30 along the detent plate 40 from the P range to the 3 range, the roller 84 rolls on the inclined surface 76 of the cam portion 75 in accordance with the shift operation of the shift lever 30. In this case, the friction between the roller 84 and the inclined surface 76 becomes rolling friction, so that the frictional resistance becomes significantly smaller than the sliding friction. Therefore, the operation force of the shift lever 30 can be small, and the operation feeling of the shift lever 30 is improved. Further, since the frictional resistance becomes small, the cam portion 7
The wear of No. 5 is also significantly suppressed.

In the state in which the shift lever 30 is shifted to the third range, the roller 84 is fitted in the depression 90 of the third range, so that an appropriate moderation feeling (positioning feeling) can be obtained.
When the shift lever 30 is shifted from the 3 range to the D range after the vehicle has started, the roller 84 moves in the vehicle width direction and engages with the recess 91 adjacent to the recess 90. In this case, the roller 84 does not roll and enters the recess 91 due to the sliding friction with the upper base 26. Therefore, the click feeling when shifting the shift lever 30 in the vehicle width direction can be made larger than the click feeling when shifting in the vehicle front-rear direction.

[0022]

【The invention's effect】

(1) According to the shift lever device for an automatic transmission of the first aspect, the shift lever is provided with a roller rotatable only in the vehicle front-rear direction, and the roller of the cam portion formed on the upper base by the biasing means. Since the roller is pressed against the inclined surface, the roller rolls on the inclined surface of the cam portion during the shift operation of the shift lever in the vehicle front-rear direction, and the frictional resistance between the roller and the inclined surface can be reduced. Therefore, the operating force of the shift lever in the vehicle front-rear direction can be small, and the operating footing of the shift lever can be improved. Moreover, since the frictional resistance between the roller and the inclined surface becomes small,
The wear of the upper base can be suppressed, and the durability of the upper base can be enhanced. (2) According to the automatic transmission shift lever device of the second aspect, since the upper base is formed with the concave portion that engages with the roller when the shift lever is positioned in a specific range in which the shift lever is not in close contact with the detent portion, The shift lever can be positioned in the vehicle width direction without using the detent portion, and a proper moderation can be obtained.

[Brief description of drawings]

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

2 is an exploded perspective view of the device of FIG. 1. FIG.

3 is a perspective view of a detent plate and an upper housing attached to the upper base of FIG. 1. FIG.

FIG. 4 is a perspective view of a main part of the shift lever of FIG.

5 is an enlarged cross-sectional view showing an engaged state of the roller of FIG. 4 and a recess of the upper base.

FIG. 6 is a plan view showing a shift pattern of a shift lever in a conventional gate type shift lever device.

FIG. 7 is a sectional view of a main part of a conventional gate type shift lever device.

[Explanation of symbols]

 20 Lower Base 26 Upper Base 30 Shift Lever 75 Cam Part 76 Sloping Surface 84 Roller 88 Biasing Means 91 Recess

Claims (2)

[Claims] 1. A shift lever mounted on a lower base so as to be swingable in a vehicle front-rear direction and a vehicle width direction and transmitting movement in a vehicle front-rear direction to a transmission; and a shift lever fixed to the lower base and positioning the shift lever in each range. An upper base provided with a possible detent portion, a cam portion formed on the lower surface of the upper base so as to extend in the swing direction of the shift lever, and having a sloped surface extending obliquely upward with respect to the shift lever; And a biasing means for pressing the roller toward the inclined surface of the cam portion to bring the shift lever into close contact with the detent portion of the upper base. Shift lever device for automatic transmission. 2. The automatic base according to claim 1, wherein the upper base is formed with a concave portion which engages with the roller and positions the shift lever in the vehicle width direction when the shift lever is positioned in a specific range where the shift lever does not come into close contact with the detent portion. Shift lever device for transmission.