JPH07239014A - Shift device for automatic transmission - Google Patents

Abstract

PURPOSE:To provide a gear shift device for an automatic transmission whereby the amount of lowering of the position pin by one operation of a button can be reduced. CONSTITUTION:A gear shift device for an automatic transmission is provided with a slider 25 which is excited downward by a force smaller than the upward exciting force of a position pin 18 and can be moved only in the vertical direction and a stopper means 28 to restrict the lowermost position of the slider 25 at a position where a part of a contact surface 27a is projected below the lower end 33a of a movement limiting part 33. Because the contact surface 27a can be used as a movement limiting part relative to the position pin 18 to be moved in one side, and the position of the lower end 33a of the original movement limiting part 33 can be set higher, the amount of lowering of the position pin 18 by one operation of a button is reduced thus providing good controllability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift device for an automatic transmission, and more particularly to a shift device for an automatic transmission for automobiles.

[0002]

2. Description of the Related Art As a conventional shift device for an automatic transmission for automobiles, for example, those shown in FIGS. 5 and 6 are known (as a similar technique, Japanese Patent Laid-Open No. 3-11777).
(See Japanese Patent Publication No. 5). In the figure, A is the front side and B is the rear side.

Reference numeral 1 denotes a shift lever, which is axially supported so as to be movable back and forth with respect to the vehicle body. The forward / backward movement amount of the shift lever 1 is transmitted to the transmission through a control cable (not shown). A vertical movement hole 2 is formed in the shift lever 1, and a vertically movable position pin 3 projects from the movement hole 2. The position pin 3 is always urged upward, and is structured to descend only when the button 5 of the knob 4 is pressed.

A position plate 6 is provided on the left side of the shift lever 1, and the position plate 6 has a small first cutout portion 7 corresponding to a parking range.
And a large second notch 8 corresponding to the other ranges are formed upward. That is, the upper edge portion 7a of the first cutout portion 7 has the first corner portion K ₁ corresponding to the parking range.
Are formed. Further, the second notch 8 corresponds to the second corner K ₂ corresponding to the reverse range, the third corner K ₃ corresponding to the neutral range, the fourth corner K ₄ corresponding to the drive range, and the second speed range. The fifth corner K ₅ and the sixth corner K ₆ corresponding to the first speed range are respectively formed in steps. A portion between the second cutout portion 8 and the first cutout portion 7 serves as a movement limiting portion 9 of the position pin 3.

The position pin 3 of the shift lever 1 has a first cutout 7 and a second cutout 8 of the position plate 6.
It is engaged inside and selectively engages with the corresponding corners K _{1 to} K ₆ according to the range position of the shift lever 1. In particular, the third corner K ₃ → the second corner K ₂ , the fourth corner K ₄ → the fifth corner K ₅ , the fifth corner K ₅ → the sixth corner K
_{As in 6} , when the position pin 3 moves from a high position to a low position, or the position pin 3 moves between the first cutout portion 7 and the second cutout portion 8 over the movement limiting portion 9. In this case, since it cannot be moved as it is, the position pin 3 is once lowered by pressing the button 5 of the knob 4.

For example, the position pin 3 is attached to the first corner K ₁
Between the second corner K ₂ and the second corner K ₂
When moving from the first corner K ₁ to the first corner K ₁ , the position pin 3 is lowered by the vertical distance L ₁ corresponding to the movement restricting portion 9, and when returning from the first corner K ₁ to the second corner K ₂ . It is necessary to lower the position pin 3 by the vertical distance L ₂ from the upper end of the first cutout portion 7 to the lower end 9a of the movement restricting portion 9.

Reference numeral 10 denotes a lock lever, which is rotatable around a lower end by a solenoid (not shown). After the position pin 3 is engaged with the first corner K ₁ , depending on the state of the key switch. By rotating the first notch 7 in the direction of closing it and restricting the lowering of the position pin 3, the release of the parking range is prevented.

Further, among the edge portions of the first cutout portion 7 corresponding to the parking range, the lower edge portion 7c extends to the front side A through the inclined edge portion 7b, and has the first corner portion K ₁ . It is located on the front side A with respect to the upper edge portion 7a. In other words, the lower edge portion 7c of the first cutout portion 7 is a portion where the position pin 3 moving from the second cutout portion 8 first hits beyond the movement restriction portion 9, and the position pin 3 contacts the first corner portion. K ₁
More than once, the state is such that the overstroke amount S for moving to the front side A is once secured. The reason why the overstroke amount S is ensured in this manner is to cover the stroke loss amount of the control cable and to reliably operate the transmission. That is, the position pin 3 is moved by the overstroke S to the first corner K ₁
Since the vehicle moves further to the front side A, the shift lever 1 reliably shifts to the parking range, and its reliability is enhanced.

The portion S corresponding to the lower edge portion 7c of the first cutout portion 7 secures the overstroke S, and the width d of the portion corresponding to the upper edge portion 7a is made as narrow as possible. is there. This is because if the width d of the upper portion is too wide, it is necessary to widen the width of the lock lever 10 or increase the amount of rotation in accordance with it, which is disadvantageous in terms of space efficiency.

[0010]

[Problems to be Solved by the Invention]
In the conventional technique, the position pin 3 is located at the first corner.
Part K₁And the second corner K₂When moving to and from
Corner K₂To the first corner K ₁If you want to move to
The vertical distance L corresponding to the movement pin 9 ₁Only
Although it is enough to lower it, the first corner K₁To the second corner K
₂Position pin 3 to the upper end of the first cutout 7
A large vertical distance L from the lower end 9a of the movement restricting portion 9 to₂
The operator must push the button
5 must be pushed in with a strong force and fully
It is very disadvantageous in terms of sex.

The present invention has been made in view of such a conventional technique, and provides a shift device for an automatic transmission capable of reducing the amount of lowering of the position pin by one button operation. is there.

[0012]

In order to achieve the above object, a shift device for an automatic transmission according to the present invention is rotatably supported on one side and the other side of a vehicle body and has a knob button. A shift lever provided with a position pin that descends against an upward biasing force only when operated and an upward first notch having a corner for engaging the position pin of the parking range are formed on one side. An upward second notch having a corner for engaging a position pin of another range is formed on the other side, and the first notch and the second notch
The position plate is a movement restricting part that can only pass over the position pin in the lowered state between the cutout part and the position pin, and the position plate is urged downward with a force smaller than the upward urging force of the position pin and placed on the position pin. In this state, the slider is movable only in the vertical direction, and the slider has a contact surface perpendicular to the position corresponding to the other movement restricting portion, and the lowermost position of the slider has a part of the contact surface lower than the lower end of the movement restricting portion. And stopper means for restricting the position so as to project downward.

[0013]

Since the slider projects a part of the contact surface below the movement restricting portion at the lowermost position, a corner portion is formed between this contact surface and the lower end of the movement restricting portion, and the position pin is placed there. Can be engaged. In other words, since the contact surface of this slider can be used as a "movement restriction portion" for the position pin that moves to one side,
It is possible to set the position of the lower end of the original movement restricting portion formed on the position plate higher than before.

Further, since the slider moves up and down together with the position pin while being placed on the position pin,
When the position pin that hits the contact surface of the slider is lowered and moved to the lower surface side of the slider, the position pin enters the first notch as it is and engages with the first corner.

Next, when moving from the first cutout portion to the second cutout portion side, the position pin is lowered to move over the movement limiting portion, but as described above, the lower end of the movement limiting portion. Since the position of is high, the amount of lowering of the position pin by one button operation is small and the operability is good.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. The same parts as those in the prior art are designated by the same reference numerals, and a duplicate description will be omitted.

1 to 3 are views showing a first embodiment of the present invention. First, the structure will be described with reference to FIG. 11
Is a base fixed to the vehicle body, and an elongated bottom hole 12 is formed substantially in the center of the base 11. A position plate 30 is erected on the left side of the bottom hole 12, and an L-shaped bracket 13 is fixed on the opposite side. The lower part of the position plate 30 and the bracket 13
A rotating pin 14 is provided between the two, and the base end portion 15a of the shift lever 15 is rotatably supported by the rotating pin 14. The bottom hole 1 is provided below the base end portion 15a.
An operating lever 16 penetrating downward from 2 is attached, and the operating lever 1 is moved by moving the shift lever 15 to the front side (one side) A and the rear side (other side) B.
A control cable 17 connected to the lower end of 6 is operated to operate a transmission (not shown).

The base end portion 15a has a box shape, and a moving hole 19 for projecting the position pin 18 is formed in the left side surface portion thereof. This position pin 18
Is always urged upward and descends only when the button 21 of the knob 20 is pressed.

In the position plate 30 of this embodiment, a first cutout 31 and a first cutout 32 are formed upward, respectively, and the first cutout 31 and the first cutout 3 are formed.
A movement limiter 33 is provided between the two. The lower end 33a of the movement restricting portion 33 is at a higher position than the conventional one, and
From the upper edge of the cutout portion 31, the lower end 33a of the movement restricting portion 33
And the vertical distance L ₃ to reach is shorter. A first corner K ₁ is formed on the side of the first cutout 31 and a third corner K ₃ is formed on the side of the first cutout 32 across the movement restricting portion 33. There is. In addition, the second corner portion K ₂ is moved to the lower end 33a of the movement restricting portion 33 by the slider 25 described later.
Is formed.

A pair of left and right guide rails 23 and 24 are erected between the position plate 30 and the base end portion 15a and in front of the bottom hole 12, and between the guide rails 23 and 24. Slider 2 with a roughly L shape
5 is movably supported up and down. Guide rail 23,
24 is a state in which the convex portions 23a and 24a face each other, and the vertical portion 26 of the slider 25 is formed with a concave portion 26a that engages with the convex portions 23a and 24a. Therefore, this slider 25 is
Between 3 and 24, it is movable only in the vertical direction and cannot rotate left and right or front and back. A vertical contact surface 27a is formed at the rear end of the horizontal portion 27 of the slider 25, and the contact surface 27a is located substantially at the center of the movement limiting portion 33.

Further, a protrusion 28 serving as a "stopper means" is formed at an intermediate height position of the left guide rail 23 so that the slider 25 cannot move below the protrusion 28. . The upper surface of the protruding piece 28 is located below the lower end 33a of the movement restricting portion 33 of the position plate 30 by L ₄ . Therefore,
The contact surface 27a of the slider 25 placed on the protrusion 28
Will project downward by L ₄ from the lower end 33a of the movement restricting portion 33.

Further, a tension spring 29 is provided between the lower portion of the slider 25 and the base 11 to constantly urge the slider 25 downward.
The biasing force of the tension spring 29 is smaller than the upward biasing force exerted on the position pin 18. Therefore, when the position pin 18 rises, the slider 25 rises together with the slider 25 placed on the position pin 18.

Next, the operation will be described with reference to FIGS.

Operation of the third corner K ₃ → the second corner K ₂ (see FIG. 2)
) :

When the position pin 18 is at the third corner K ₃ of the first notch 32, the slider 25 is at the lowest position with the lower surface abutting the protrusion 28 due to the action of the tension spring 29. Then, the lower portion of the contact surface 27a of the slider 25 is projected downward by L ₄ from the lower end 33a of the movement restricting portion 33, and the contact surface 27a and the lower end 33a of the movement restricting portion 33 are " A corner K ₂ "is formed. Therefore, when the operator pushes the button 21 to lower the position pin 18 by L _{3 and then} tilts the shift lever 15 to the front side A, the position pin 18 engages with the second corner portion K ₂ , A corresponding reverse range is obtained.

Operation of second corner K ₂ → first corner K ₁ (see FIG. 2)
And FIG. 3) :

When the position pin 18 is engaged with the second corner portion K ₂ , the button 21 is pushed to push the position pin 18
After further lowering by L ₄ , the shift lever 15 is moved to the front side A. Then, the position pin 18 is the first
The lower edge portion 31c of the cutout portion 31 is contacted with and enters the lower surface side of the slider 25. Position pin 18 is slider 2
When entering the lower surface side of 5, the upward biasing force of the position pin 18 is set to be larger than the downward biasing force of the slider 25, so the position pin 18 rises while lifting the slider 25, and the inclined edge portion 31b and The first corner K ₁ is reached along the upper edge 31a.

Operation of the first corner K ₁ → the second corner K ₂ (FIG. 3)
) :

When the position pin 18 is returned to the original second corner K ₂ , the button 21 is pushed from the state where the position pin 18 is engaged with the first corner K ₁ to move the position pin 18 to the position L ₃ Just lower. At this time, the slider 25
Also goes down together with the position pin 18. Then, when the shift lever 15 is moved to the rear side B, the position pin 18 is disengaged from the lower surface of the slider 25, so that the slider 25 falls to the projecting piece 28 by the urging force of the tension slider 29, and the contact surface 27a and the movement restricting portion. 33
A second corner portion K ₂ is formed between the lower edge 33a and the lower end 33a. Therefore, a state in which the position pin 18 is engaged with the second corner K _2, the reverse range is thus obtained which corresponds to the second corner portion K _2. As described above, since the movement restricting portion 33 of this embodiment reaches the lower end 33a, the vertical distance L ₃ is short,
The amount of lowering of the position pin 18 by one operation of the button 21 is small. Therefore, the operator does not have to push the button 21 strongly and deeply, and the operability of the shift lever 15 is good.

FIG. 4 is a diagram showing a second embodiment of the present invention. This embodiment shows an example in which the front-back width α of the movement restricting portion 35 formed on the position plate 34 is set small. When the front-back width α of the movement restricting portion 35 is reduced in this way, it is impossible to form a new corner portion at the lower end 33a thereof due to insufficient strength, but in the second embodiment as well, in the second embodiment described above. Similarly, since the second corner portion K ₂ is formed between the contact surface 27a of the slider 25 and the lower end 35a, the second corner portion K ₂ can be formed without inconvenience in strength.
It becomes possible to form the corner K ₂ . The fact that the front-rear width α of the movement restricting portion 35 can be reduced in this way makes it possible to reduce the overall front-rear length of the position pin 18 and to suppress the front-rear movement amount of the shift lever. It is very advantageous to effectively use the indoor space. Other configurations and operational effects are the same as those in the first embodiment described above, and redundant description will be omitted.

In the above embodiments, the example in which the box-shaped base end portion 15a is formed on the shift lever 15 has been shown. However, if the vertically movable position pin 18 is formed, it is as simple as the conventional one. It may be a pipe type.

As an example in which the tension spring 29 is provided between the slider 25 and the base 11 as a means for urging the slider 25 downward, an upper end portion of the slider 25 and a member located above it are shown. A compression spring for urging the slider 25 downward may be provided in between. Further, the means for urging the slider 25 downward is not limited to the spring, and an elastic member such as rubber or leaf spring may be used.

[0033]

The shift device of the automatic transmission according to the present invention has the contents as described above, and the contact surface of the slider is the "movement limiting portion" with respect to the position pin.
Therefore, it is possible to set the position of the lower end of the original movement restricting portion formed on the position plate to a position higher than the conventional position. Therefore, when the position pin is moved from the first notch to the second notch, the amount of lowering of the position pin by one button operation is small, and the operator does not push the button harder than necessary. Therefore, the operability of the shift lever is improved.

Further, even if the front and rear width of the movement restricting portion is reduced in order to effectively use the vehicle interior space, the "movement restricting portion" can be reliably formed by the slider without causing a disadvantage in strength. it can.

[Brief description of drawings]

FIG. 1 is a perspective view showing a shift device for an automatic transmission according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state in which a second corner portion is formed at a lower end of a slider and a movement limiting portion.

FIG. 3 is an explanatory diagram corresponding to FIG. 2 showing a state where a position pin and a slider are raised.

FIG. 4 is an explanatory diagram corresponding to FIG. 2 showing a second embodiment of the present invention.

FIG. 5 is a perspective view showing a shift device of a conventional automatic transmission.

FIG. 6 is an explanatory diagram showing a relationship between a conventional position plate and position pins.

[Explanation of symbols]

15 shift lever 18 position pin 20 knob 21 button 23, 24 guide rails 23a, 24a convex portion 25 slider 26a concave portion 27a contact surface 28 projecting piece (stopper means) 30 position plate 31 first cutout portion 32 second cutout portion 33 movement limiting portions 33a movement restricting portion lower K ₁ ~K ₆ corner a front side (one side) B rear side (the other side) S-over stroke

Claims (4)

[Claims] 1. A shift lever provided on a vehicle body so as to be reciprocally movable to one side and the other side, and provided with a position pin that descends against an upward biasing force only when a knob button is operated, and a parking range. The first upward notch having the corner for engaging the position pin of the other side is formed on one side, and the second upward notch having the corner for engaging the position pin of the other range is on the other side. And a position plate that is a movement restricting portion formed between the first notch portion and the second notch portion to allow only the position pin in the descending state to be passed over, and the position plate moves downward with a force smaller than the upward biasing force of the position pin. A slider which is urged and movable only in the up-down direction while resting on the position pin, and which has a vertical contact surface at a position corresponding to the movement restricting portion on the other side; A shift device for an automatic transmission, comprising: stopper means for restricting a lowermost position of the contact surface to a position where a part of the contact surface projects below the lower end of the movement restricting portion. 2. The automatic transmission according to claim 1, wherein among the edge portions on one side of the first cutout portion, the lower edge portion is located on one side by a predetermined overstroke than the upper edge portion. Shift device. 3. The slider according to claim 1 or 2, wherein a slider having a concave portion engaging with the convex portion is vertically movably supported between a pair of guide rails erected with the convex portions facing each other. Shift device for automatic transmission. 4. The shift device for an automatic transmission according to claim 3, wherein the stopper means is formed with a protrusion that abuts the lower surface of the slider on at least one of the guide rails.