JP2002122234A - Select device for transmission having mis-select prevention function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a select device having a misselect function and capable of preventing energizing forces applied to a shaft from a plurality of springs from affect ing each other, applying a large energizing force when moving the shaft to a backward position, and reducing the number of parts because the shaft is energized toward a neutral position by a plurality of springs when moving the shaft of a transmission of a vehicle from the neutral position to a low speed stage position or a high speed stage position. SOLUTION: The shaft 20 having one end part 31 and the other end part 21 is held in a housing 10 in at least movable condition in the axial direction and takes an advance neutral position N, an advance A position, an advance B position, and a backward position R by select operation. When the shaft 20 moves from the advance neutral position to the advance B position and from the advance A position to the backward position, an energizing force for advancing toward the advance neutral position is applied to the shaft by the first spring 24. When the shaft 20 moves from the advance neutral position to the advance A position and further from the advance A position to the backward position, an energizing force for advancing toward the neutral position is applied by the second spring 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a select device having a misselection preventing function for preventing a shaft from being erroneously selected to a reverse position in a transmission.

[0002]

2. Description of the Related Art A transmission converts a driving force of an engine in a vehicle such as an automobile at an optimum speed ratio (ratio of rotation speed) according to a running state of the vehicle and transmits the converted power to wheels.
One of them is a manual transmission. In the manual transmission, a shift is performed by a driver manually operating a shift lever. The manual operation includes a select operation and a shift operation.

For example, when the shift lever has a shift and select pattern shown in FIG. 14, the select operation means that the shift lever is shifted to a low speed (first speed, second speed) and a middle speed (third speed, fourth speed). ), Or moving to a position corresponding to a high gear (fifth and sixth gears) or a reverse gear (see arrow A). On the other hand, the shift operation is to move to the first speed or the second speed at the low speed position, to the third or fourth speed at the middle speed position, and to the fifth or sixth speed at the high speed position (arrow B). See). In the transmission, a predetermined gear is selected by a select device including the shift lever and a select shaft that is moved by a shift operation of the shift lever.

FIG. 13 shows an example of a conventional selection device. This is an example in which the shaft is movable in the axial direction and rotatable around the axis (shift and select shaft).

In FIG. 13, a housing 100 has a cylindrical portion 101 on one end side (upper end side in FIG. 13) and a body portion 102 on the other end side, and a step between them forms an abutting surface 103. I have. A holding member 1 having a container-shaped large-diameter hole 106 and a small-diameter hole 107 at the other end of the housing 100.
05 is attached by a bolt 109.

A shift and select shaft (hereinafter, referred to as a "shaft" in the embodiment) 110 has one end (FIG. 13).
At the upper end) is held by the cylindrical portion 101 of the housing 100, and the other end of the small-diameter hole 10
7 and is movable in the axial direction,
It is rotatable about an axis. First spring receiver 11 attached to retaining shaft 111 near the upper end of shaft 110
2 is movable only to the other end (the lower end in FIG. 13).

An arm member 116 having a head 116a is fixed to the shaft 110, and a frame member 118 is provided outside the arm member 116.
Has been fixed. A first compression coil spring (hereinafter, referred to as “spring” in the embodiment) 119 for a high-speed stage is disposed between one surface of the frame member 118 and the spring receiver 112.

A second spring receiver 121 is accommodated in the large-diameter hole 106 of the holding member 105, and is pointed to the shaft 110. A second spring for a low-speed gear is provided between one surface (upper surface in FIG. 13) of the second spring receiver 121 and one surface (lower surface in FIG. 13) of the third spring receiver 122 fixed to the other surface of the frame member 118. 123 are provided. A third reverse spring 124 is arranged between the other surface of the second spring receiver 121 and the bottom surface of the holding member 105. Second spring 12
The set load of 3 is larger than the set load of the first spring 119, and the set load of the third spring 124 is selected to be larger than the sum of the set load of the first spring 119 and the set load of the second spring 123. I have.

The shaft 110 moves to any one of four positions based on the shift lever select operation. The four positions include a neutral (middle speed position) position N corresponding to the third speed and the fourth speed, and a low speed position L located at one end side of the neutral position N and corresponding to the first speed and the second speed. , Neutral position N
A high-speed gear position H located on the other end side and corresponding to the fifth speed and the sixth gear speed, and a reverse position R further on the other end side than the high-speed gear position R.

In a neutral state, the shaft 110 is urged toward one end by a difference in set load between the first spring 119 and the second spring 123, and the first spring receiver 112 is in contact with the contact surface 103. When the shaft 110 moves to the high-speed step position H based on the select operation of the shift lever, the frame member 118 approaches the first spring receiver 112 and compresses the first spring 119 (the second spring 123 expands). On the other hand, the shaft 110
Moves from the neutral position N to the low gear position L, the frame member 11
8, ie, the third spring receiver 122 approaches the second spring receiver 121 and compresses the second spring 123 (at this time, the third spring 12
4 is not compressed).

When the shaft 110 moves from the low speed position L to the reverse position R with a larger force, the third spring receiver 122, which has compressed the second spring 123, comes into contact with the second spring receiver 121, and the two springs are integrated. Approaching the holding member 105, thereby compressing the third spring 124.

[0012]

However, the conventional selecting device has a shaft 110, a housing 100, and a holding member 10.
5, three spring receivers 112, 121, and 122 are arranged, and three springs 119, 123, and 124 are arranged in series.

First, when the shaft 110 is moved from the neutral position N to the high speed position H at one end, the first spring 11
9 is compressed to return the shaft 110 to the neutral position. At this time, the urging force of the second spring 123 (the first spring 119) is applied.
(The direction opposite to the biasing force of the first spring 119) affects the biasing force of the first spring 119, that is, the returning force to the neutral position N. Therefore, the second spring 12 when the shaft moves from the neutral position N to the high-speed position H
It is difficult to set an appropriate set load for the third and first springs 119.

To prevent misselection to the reverse position R, the set load of the third spring 124 is
Needs to be larger than the total set load. As a result, a spring having a strong urging force or a large size is required as the third spring 124, and assembling becomes difficult.

Further, in addition to the three springs 119, 123 and 124, three spring receivers 112, 121 and 1 are provided.
The provision of the housing 22 increases the length of the housing 100 and the shaft 110 in the axial direction, requiring a large space in the vehicle, and increases the number of components used.

The present invention has been made in view of the above circumstances, and when the shaft is moved from the neutral position to the high speed position, the urging forces of a plurality of springs urging the shaft toward the neutral position are mutually different. It is an object of the present invention to provide a select device having a misselection prevention function that does not affect each other and can obtain a large urging force when the shaft is moved to a reverse position. Another object of the present invention is to provide a select device having a misselect function that can reduce the number of parts used and thereby reduce the axial dimension.

[0017]

The inventor of the present application sets the number of springs for urging the shaft to the neutral position at two, and when the shaft moves from the low-speed position or the high-speed position to the reverse position. The present invention has been completed in view of urging the shaft toward the neutral position with an urging force obtained by combining the urging forces of the two springs.

That is, the select device for a transmission having a misselect function according to the present invention has a housing and one end and the other end, and is held in the housing so as to be movable at least in the axial direction. A forward A position moved to one end side from the forward neutral position, a forward B position moved to the other end side from the forward neutral position, and a backward move further to the one end side than the forward A position A shaft moved to any one of the following positions: the shaft moves from the forward neutral position to the forward B position, and from the forward A position to the reverse position; A first spring for applying a biasing force toward the shaft; when the shaft moves from the forward neutral position to the forward A position, and when the shaft moves from the forward A position to the reverse position, the shaft is in the forward neutral position. A second spring applying a biasing force toward; characterized in that it includes.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Housing) The housing only needs to have a shaft hole which can hold the shaft movably at least in the axial direction. However, if the shaft is a so-called shift-and-select shaft that can move in the axial direction and rotate around the axis, the shaft hole needs to hold the shaft so that the shaft can move and rotate. Further, the housing may have one end side stopper surface and the other end side stopper surface which are separated in the axial direction of the shaft and opposed at the first interval. These stopper surfaces prevent movement of a spring receiver described later. (Shaft) A shaft having one end and the other end, which is movable in the axial direction, moves in the axial direction by a select operation, and takes a forward neutral (middle speed) position, a forward A position, a forward B position, or a reverse position. . These are arranged in the reverse position, forward A position, neutral position, and forward B position in order from one end of the shaft.

As the forward neutral position of the shaft, a position corresponding to the third speed and the fourth speed is usually used in consideration of the frequency of use of the shift. As the forward A position, a position corresponding to a low speed (first speed and second speed) may be selected, or a position corresponding to a high speed (fifth speed and sixth speed) may be selected. . On the other hand, as the forward B position, a position corresponding to a shift speed opposite to the inner forward A position of positions corresponding to the low speed stage and the high speed stage is selected. For example, when a position corresponding to the low gear is selected as the forward A position, the reverse position, the low gear position, the neutral position, and the high gear position are sequentially from one end of the shaft. On the other hand, when a position corresponding to the high gear is selected as the forward A position, the reverse position, the high gear position, the neutral position, and the low gear position are sequentially from one end of the shaft.

Further, the shaft is provided so as to be movable only from the first position on the one end side to the other end side, and has a one-side spring receiver provided with a spring seat on the front surface thereof, which can contact the one-side stopper surface on the back surface thereof. And a second end spring support provided with a spring seat on the rear surface thereof, which is movably attached only from the second position on the other end side to the one end side, and which can contact the other end side stopper surface on the back surface thereof. . The distance between the first and second positions of the shaft (second distance) is smaller than the first distance between the pair of stopper surfaces. This is because the spring receiver mounted on the shaft is brought into contact with the stopper surface on the back surface. Note that one end of the second spring may be directly in contact with the stopper surface instead of the spring receiver. (First Spring) A compression spring may be employed as the first spring, and may be disposed between the one end spring support and the other end spring support on the shaft. When the shaft moves from the forward neutral position to the forward B position, the first spring is compressed by the one-side spring receiver approaching the other-side spring receiver in contact with the other-side stopper surface of the housing, and the first spring is compressed by the shaft. Apply a bias toward the neutral position. Further, when the shaft moves from the forward A position to the reverse position, the first spring is compressed by the one-side spring receiver approaching the one-side spring receiver abutting on the one-side stopper surface, so that the first spring is compressed to the neutral position. Apply bias toward.

When the shaft moves from the forward neutral position to the forward A position, the first spring does not change the biasing force applied to the shaft (maintains the biasing force when the shaft is at the forward neutral position). can do. (Second Spring) A compression spring may be employed as the second spring, and may be disposed between the one end side end surface and the other end side spring receiver.
In this case, the second spring is desirably arranged in parallel with the first spring (for example, coaxially with the first blade and radially outward). When the shaft moves from the neutral position to the forward A position, the second spring is compressed by the other end spring receiver approaching the one end stopper surface until the one end spring receiver comes into contact with the one end stopper surface. To the neutral position. Further, when the shaft moves from the forward A position to the reverse position, the second spring is compressed by the spring support at the other end approaching the stopper surface at the one end, and cooperates with the first spring to move the shaft to the neutral position. Energize.

The second spring does not change the biasing force applied to the shaft when the shaft moves from the forward neutral position to the forward B position (maintains the biasing force when the shaft is at the forward neutral position). can do.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a selection device having a function of preventing a misselection according to an embodiment of the present invention. <First Embodiment> FIG. 1 shows a shift and select shaft (hereinafter abbreviated as "shaft" in the embodiment) constituting a selection device of a manual transmission and its periphery.

The housing 10 comprises a cylindrical first holding portion 11 at one end (the lower end in FIG. 1), a bottomed cylindrical second holding portion 12 at the other end, and a middle body 14. Part 14
Has a large diameter portion 16 and a small diameter portion 15 (the right side of the body portion 14 is open). On the other hand, the shaft 20 includes one end (a lower end in FIG. 1) 31, an intermediate portion 23, and the other end 21, and the whole has substantially the same diameter.

One end 31 and the other end 21 of the shaft 20
Are the first holding portion 11 and the second holding portion 1 of the housing 10.
2 and are held axially movable and rotatable via splines (not shown). An arm 32 is attached to one end 31 of the shaft 20, and a pin 33 is fixed to a tip of the arm 32. The pin 33 is connected to a shift lever by a cable (not shown) or the like. When the shift lever is shifted, the pin 33 moves in a direction perpendicular to the plane of FIG. 1 to rotate the shaft 20 around its axis. . The space between the first holding portion 11 and the one end 31 is sealed by a seal member 34 and covered by a cover 35.

The housing 1 of the intermediate portion 23 of the shaft 20
In a portion corresponding to the large-diameter portion 16 of FIG.
The second spring plate (the other end side spring receiver) 27 is attached to each side.

As shown in FIG. 2, the first spring plate 24
Has a cylindrical shape as a whole including a locking portion 24a and a spring receiving portion 24b, and is loosely fitted to the intermediate portion 23 at the locking portion 24a. The back surface (the lower surface in FIG. 1) of the locking portion 24a is neglected by the retaining ring 25, and can be moved only to the other end 21 side from the position (first position) of the retaining ring 25. The first spring plate 24 has a spring seat 24c on the front surface of a spring receiving portion 24b, and the back surface of the spring seat 24c abuts on a plate 17 fixed to one end surface (one end side stopper surface) 16a of the large diameter portion 16. It is possible.

The second spring plate 27 comprises a locking portion 27a and a spring receiving portion 27b, has a hollow disk shape as a whole, and is loosely fitted to the intermediate portion 23 at the locking portion 27a. The rear surface (upper surface in FIG. 1) of the locking portion 27a is brought into contact with an end surface of a cylindrical portion 38a of the arm member 38 described later,
It is possible to move only to the one end 31 side from the position of the end face (second position). The spring receiving portion 27b has two spring seats 27c on its front surface, and can contact the other end surface (the other end side stopper surface) 16b of the large diameter portion 16 on its rear surface. As is clear from this, the interval between the retaining ring 25 and the cylindrical portion 38a is smaller than the interval between the one end face 16a and the other end face 16b.

Between the spring seat 24c of the first spring plate 24 and the spring seat 27c of the second spring plate 27, a small-diameter first compression coil spring (hereinafter referred to as "spring" in the embodiment) 35 is disposed. 2 Spring seat 2 of spring plate 27
A large-diameter second spring 36 is arranged in parallel with the first spring 35 between the plate 7c and the plate 17 fixed to the one end surface 16a.

Returning to FIG. 1, the intermediate portion 23 of the shaft 20
, An arm member 38 is fixed by a pin 39. The arm member 38 has a cylindrical portion 38a and a head portion 38b extending therefrom and selectively engaging with engagement portions of four fork shafts (not shown). The four fork shafts are arranged parallel to each other in the direction perpendicular to the plane of the paper of FIG. 1, and are arranged in the order from the other end to fifth and sixth speeds (high speed), third and fourth speed (medium speed). , First speed, second speed (low speed), and reverse speed. For example, shaft 2
When 0 moves to the high-speed gear position H, the head portion 38b engages with the engaging portion of the high-speed gear fork shaft, and the fifth speed or the sixth speed is selected by rotating the shaft 20.

A drive arm 4 for moving the shaft 20 in the axial direction is provided on the outer peripheral surface of the small diameter portion 15 of the body portion 14.
1 is attached. The drive arm 41 has an L-shape as a whole as shown in FIGS. 3 and 4, and its bent portion is rotatably attached to the small diameter portion 15 by the shaft 43 of the select lever 44. One end of the drive arm 41 is fixed to the select lever 44, and a pin 42 erected at the other end is connected to the shift lever by a cable or the like. Therefore, when the shift lever is selected, the drive arm 41 rotates around the shaft 43, and the shaft 20 is moved in the axial direction via the select lever 44 and the arm member 38.

Next, the operation and effect of this embodiment will be described.

Regarding the axial movement of the shaft 20, that is, the select operation, the position where the head portion 38 of the arm member 38 faces the third speed and fourth speed fork shafts is the neutral position (forward neutral position) N. When the shaft 20 is in the neutral position N as shown in FIG. 1 and FIG.
The initial set loads of the spring 35 and the second spring 36 are f1a and f2a, respectively, as shown in FIG. 6, and the latter is larger than the former. However, this is not essential. The shaft 20 is urged toward the other end 21 and the second spring plate 27
Abuts against the other end face 16b, and the first spring plate 24 and the second
Separated from the spring plate 24 (first spring plate 2
4 is apart from one end face 16a).

When the shift lever is shifted from the neutral position to the high speed position, the driving arm 41 rotates around the shaft 43 by the force applied through the pin 42 in FIG.
0 is selected from the neutral position N to the high gear position (forward B position) H. The movement of the shaft 20 causes the retaining ring 2
The first spring plate 24, whose movement toward one end is regulated by 5, moves integrally with the shaft 20 to the other end.
The second spring plate 27 in contact with the other end surface 16b does not move. The first spring 35 is compressed until the first spring plate 24 contacts the second spring plate 27. As a result, the first spring plate 24 approaches the other end surface 16b and compresses the first spring 35, and the first spring 35 urges the shaft 20 toward one end, that is, toward the lower end in FIG. 5B. I do.

As shown in FIG. 6, the urging force applied to the shaft 20 from the first spring 35 increases from f1a to f1b in proportion to the amount of movement of the shaft 20, that is, the amount of deflection of the first spring 35. The driver performs the select operation of the shift lever against this urging force. When the shaft 20 moves from the neutral position N to the high speed position H, the second spring 3
6 remains in the compressed state at the neutral position N. Therefore, at this time, there is no concern that the second spring 36 affects the urging action of the first spring 35.

After the shaft 20 has been moved to the high speed position H, the shift lever is shifted to the fifth or sixth speed. Then, the shaft 20 is rotated by the force applied to the arm 32 using the pin 33 or the like, and the head portion 38b of the arm member 38 moves the fifth-speed and sixth-speed shift forks in the axial direction.

Next, when the shift lever is selected from the neutral position to the low speed position, the drive arm 41 rotates in the direction opposite to the above direction, and moves the shaft 20 from the neutral position N to the low speed position (forward A position) L. Move to one end side. By this movement, as shown in FIG. 5 (c), the second spring plate 27, which has been in contact with the other end surface 16b, moves to one end side integrally with the shaft 20, and the first spring plate 24 becomes a retaining ring 25.
Moves integrally with the shaft 20 as it moves toward one end. Accordingly, the distance between the two spring plates 24 and 27 does not change, but the second spring plate 24 is moved to the one end face 16.
approach a. The second spring plate 27 is compressed until the first spring plate 24 contacts the one end face 16a. As a result, the second spring 36 is compressed, and urges the shaft 20 upward at the other end side, that is, in FIG. .

As shown in FIG. 6, the urging force from the second spring 36 toward the neutral position applied to the shaft 20 is applied to the shaft 2.
It increases from f2a to f2b in proportion to the movement amount of 0.
The driver selects the shift lever against this urging force. When the shaft 20 moves from the neutral position N to the low speed position L, the first spring 35 remains compressed at the neutral position. Therefore, at this time, there is no concern that the first spring 35 affects the urging action of the second spring 36.

When the shift lever is selected to the lower gear, the shift operation is performed to the first speed or the second speed. Then, the shaft 20 is rotated by the arm 32, and the head portion 38b
Moves the shift fork for the first speed or the second speed in the axial direction.

Subsequently, when the shift lever is selected from the low gear to the reverse gear, as the shaft 20 moves further from the low gear position L toward the reverse position R on one end side via the drive arm 41, The two spring plates 27 move integrally with the shaft 20 toward one end. As a result, as shown in FIG. 5D, the second spring plate 27 further approaches the first spring plate 24 in contact with the one end surface 16a, and compresses the first spring 35 and the second spring 36. The shaft 20 is configured such that the second spring plate 27 is
Move until it touches 4. Accordingly, the second spring 36
Is further compressed from the compressed state at the low speed position L shown in FIG. 5C, and the urging force is changed from f2b to f2 as shown in FIG.
2c.

On the other hand, the first spring 35 in the initial setting state at the low speed position L of the shaft 20 is gradually compressed as the shaft 20 moves, similarly to the movement from the neutral position N to the high speed position H. The biasing force is f1a to f1b
To rise. As a result, as shown in FIG. 6, when moving from the low speed position L to the reverse
The biasing force (from f3a to f3b) toward the neutral position N, which is the sum of the biasing force of the spring 35 and the biasing force of the second spring 36, acts.

Here, the urging force applied to the shaft 20 by the first spring 35 when moving from the low speed position L to the reverse speed position R is applied to the shaft 20 when moving from the neutral position N to the high speed position H. (However, the direction is opposite). This is because the first spring plate 24 and the second spring plate 2 move when the shaft 20 moves from the low speed position L to the reverse speed position R and when the shaft 20 moves from the neutral position N to the high speed position H.
This is because the relative approach distances with the distance 7 are equal. However, both need not be equal.

As is clear from the above, when the shaft 20 moves from the low speed position L to the reverse position R, the urging force (return force) of the first spring 35 and the second spring 36 moves the shaft 20 to the neutral position N. Join in the direction of returning to. Therefore, when the driver selects the shift lever from the first gear or the second gear to the reverse gear, the driver feels the large urging force of the sum of the urging forces of the two springs 35 and 36 in his hand, and You can clearly recognize that is selected. Thereby, it is possible to prevent a misselection in which the shift lever is selected to the reverse gear against the driver's intention. <Second Embodiment> In the second embodiment shown in FIGS. 7 and 8, a low speed position L, a neutral position N, and a high speed position H follow a reverse gear position R at one end of the shaft. 7 differs from the first embodiment in that one end 31 of the shaft 20 is the upper end in FIG.

More specifically, as shown in FIG. 7, the first spring plate (first spring receiver) 40 includes a locking portion 40a and a spring receiving portion 40b, and has a cylindrical shape as a whole. The portion 40a is loosely fitted to the intermediate portion 23. The rear surface (upper surface in FIG. 7) of the locking portion 40a is locked by a retaining ring 41, and can be moved only to the other end side of the retaining ring 41. The first spring plate 40 has a spring seat 40c on the front surface of a spring receiving portion 40b, and the back surface of the spring seat 40c has a concave one end surface (one end side stopper surface) 44a of the large diameter portion 16.
Can be abutted.

The second spring plate (second spring receiver) 45 is composed of a locking portion 45a and a spring receiving portion 45b, has a hollow disk shape as a whole, and is loosely fitted to the intermediate portion 23 at the locking portion 45a. Have been. The rear surface (the lower surface in FIG. 7) of the locking portion 45a is locked by a retaining ring 46, and can be moved only to one end side of the retaining ring 46. The spring receiving portion 45b has two spring seats 45c on the front surface thereof, and can contact the other end surface (the other end side stopper surface) 44b of the large diameter portion 16 on the back surface thereof.

A first spring (first spring) 47 similar to the first spring 35 is disposed between the spring seat 40c of the first spring plate 40 and the spring seat 45c of the second spring plate 45,
Between the one end surface 44a and the second spring plate 45, the second
A second spring (second spring) 48 similar to the spring 36 is arranged. The other points are the same as in the first embodiment.

Next, the operation and effect of this embodiment will be described.

When the shaft 20 is at the neutral position N, the shaft 20 is biased toward the other end and the second spring plate 45
Abuts against the other end surface 44b, and the first spring plate 40 and the second
It is separated from the spring plate 45 (the first spring plate 4
0 is apart from one end surface 44a).

As the shaft 20 moves from the neutral position N toward the high-speed step position (forward B position) H toward the other end, the first spring plate 40 is integrated with the shaft 20 as shown in FIG. To the other end, and the first spring 47
Compress. The first spring 47 is compressed until the first spring plate 40 contacts the second spring plate 45.

As a result, the first spring plate 40 approaches the second spring plate 45 to compress the first spring 47,
The spring 47 urges the shaft 20 toward one end, that is, upward. At this time, the urging force applied to the shaft 20 from the first spring 47 increases in proportion to the amount of movement of the shaft 20. When the shaft 20 is moved from the neutral position N to the high speed position H
, The second spring 48 remains in the compressed state at the neutral position N, and there is no fear of affecting the urging action of the first spring 47.

As the shaft 20 moves from the neutral position N toward the low-speed position (forward A position) L toward the one end 31 side, as shown in FIG. The second spring plate 45 moves to one end integrally with the shaft 20, and the first spring plate 40
Moves together with 0. The second spring 48 is compressed until the first spring plate 40 contacts the one end surface 44a. At this time, the distance between the two spring plates 45 and 40 does not change, but the second spring plate 45 approaches the one end surface 44a.

As a result, the second spring 48 is compressed, and urges the shaft 20 toward the other end, ie, toward the neutral position N.
At this time, the urging force applied to the shaft 20 from the second spring 48 toward the neutral position increases in proportion to the amount of movement of the shaft 20. When the shaft 20 moves from the neutral position to the low speed position L, the first spring 47 remains in the compressed state at the neutral position, and there is no fear that the biasing action of the second spring 48 is affected.

As the shaft 20 moves further from the low-speed position L toward the reverse position R on the one end 31 side, the second spring plate 45 further moves integrally with the shaft 20 toward the one end 31 side. The shaft 20 moves to one end side until the second spring plate 45 contacts the first spring plate 40. As a result, as shown in FIG. 8C, the second spring plate 45 further approaches the first spring plate 40 abutting on the one end surface 44a, and compresses the first spring 47 and the second spring 48.

Accordingly, as shown in FIG. 8C, the second spring 48 is further compressed from the compressed state at the low speed position L, and applies a biasing force toward the other end, that is, downward, to the shaft 20. , Its bias increases gradually. On the other hand, the first spring 47 in the initial setting state at the low speed position L of the shaft 20 is
As the shaft 20 moves, it is gradually compressed and the urging force gradually increases, and the urging force toward the neutral position N is applied to the shaft 20 similarly to the second spring 48. As a result, when moving from the low speed position L to the reverse position R, the shaft 20
7 and the biasing force of the second spring 48 act toward the neutral position N.

Here, the urging force applied to the shaft 20 by the first spring 47 when moving from the low speed position L to the reverse speed position R is applied to the shaft 20 when moving from the neutral position N to the high speed position H. Equal to (but in the opposite direction)
However, it is not essential that they are equal.

As is clear from the above, when the shaft 20 moves from the low speed position L to the reverse speed position R, the first
The biasing force of the spring 40 and the second spring 45 applies the shaft 20 toward the neutral position N. Therefore, the driver feels the large urging force of the two springs 45 and 40 in his hand, and can clearly recognize that the reverse gear is being selected, thereby preventing misselection. <Third Embodiment> FIGS. 9 and 10 show a third embodiment of the present invention. This embodiment corresponds to a modification of the second embodiment. That is, in FIG. 9, the first spring plate 5
The configuration of the first and second spring plates 52, the first spring 55 and the second spring 56 is the same as that of the first and second spring plates 40 and 45 and the first spring 4 in the second embodiment.
7 and the second spring 48. However, the upper end 31 of the shaft 20 is one end, and the reverse stage position R, the high speed stage position (forward B position) H,
The difference is that a neutral position (forward neutral position) N and a low gear position (forward A position) L are set.

Therefore, as shown in FIG. 10A, when the shaft 20 moves to the other end (the lower end in FIG. 10) toward the low speed position L, the first spring plate 51
Moves to compress the first spring 55. As a result, the shaft 20 is biased by the first spring 55 toward the one end 31, that is, toward the neutral position. On the other hand, as shown in FIG.
Side, the second spring plate 52 moves to the second
The spring 56 is compressed. As a result, the shaft 20 is urged by the second spring 56 toward the other end, that is, toward the neutral position. Further, as shown in FIG. 10C, when the shaft 20 moves further toward the one end 31 toward the reverse position R,
The second spring plate 52 further moves to compress the first spring 55 and the second spring 56. As a result, the shaft 20 is biased by the two springs 55 and 56 toward the other end, that is, the neutral position. <Fourth Embodiment> FIGS. 11 and 12 show a fourth embodiment of the present invention.
Shown in This embodiment corresponds to a modification of the first embodiment. That is, in FIG. 11, the configuration of the first spring plate 61 and the second spring plate 62, and the configuration of the first spring 65 and the second spring 66 are the same as those of the first spring plate 24, the second spring plate 27, and the first spring plate in the first embodiment. The configuration is the same as the configuration of the spring 35 and the second spring 36. However, the lower end of the shaft 20 is one end 31 and the one end 31
Reverse gear position R, high-speed gear position (forward B position) in order from
H, a neutral position (forward neutral position) N and a low gear position (forward A position) L.

Accordingly, as shown in FIG. 12A, when the shaft 20 moves to the other end (the upper end in FIG. 12) toward the low speed position L, the first spring plate 61
Moves to compress the first spring 65. As a result, the shaft 20 is biased by the first spring 65 toward the one end 31, that is, toward the neutral position. On the other hand, as shown in FIG.
Side, the second spring plate 62 moves to the second
The spring 66 is compressed. As a result, the shaft 20 is biased by the second spring 66 toward the other end, that is, toward the neutral position. Further, as shown in FIG. 10C, when the shaft 20 moves further toward the one end 31 toward the reverse position R,
The second spring plate 62 further moves to compress the first spring 65 and the second spring 66. As a result, the shaft 20 is biased by the two springs 65 and 66 toward the other end, that is, the neutral position.

[0060]

As described above, in the select device of the transmission having the misselect function according to the present invention, the shaft moves from the forward neutral position to the forward B position and from the forward A position to the reverse position. When moving, the first spring receives an urging force toward the forward neutral position. Further, when moving from the forward neutral position to the forward A position and when moving from the forward A position to the reverse position, the second spring receives an urging force toward the forward neutral position.

Therefore, according to the transmission selecting device having the misselect function of the present invention, unlike the conventional example, when the shaft moves from the forward neutral position to the forward A position, the urging force of the first spring is applied to the shaft. When moving from the forward neutral position to the forward B position without acting, the urging force of the second spring does not act on the shaft. Therefore, it is easy to set the biasing force of the first and second springs. Moreover, when the shaft moves from the forward A position to the reverse position, a large urging force is applied to the shaft by the first spring and the second spring. Furthermore,
Since only two springs are required to return the shaft to the neutral position, various effects such as a reduction in the number of spring receivers and the like, a reduction in the number of parts, and a reduction in the axial dimension of the selection device can be achieved. can get.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a select device according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a main part in FIG.

FIG. 3 is a perspective view of an arrow III in FIG. 1;

FIG. 4 is a sectional view taken along the line IV-IV in FIG.

FIGS. 5A and 5B are operation explanatory diagrams showing a forward neutral position, FIG. 5B a forward B position, FIG. 5C a forward A position, and FIG.

FIG. 6 is an explanatory diagram showing a change in operation (biasing force of a spring) in the first embodiment.

FIG. 7 is a front sectional view showing a select device according to a second embodiment of the present invention.

FIG. 8 (a) shows a forward B position in the second embodiment,
(B) is an explanatory view showing a forward A position and (c) is a reverse position.

FIG. 9 is a front sectional view showing a main part of a select device according to a third embodiment of the present invention.

FIGS. 10A and 10B are explanatory diagrams showing a forward B position, a forward A position, and a backward position in the third embodiment.

FIG. 11 is a front sectional view showing a main part of a select device according to a fourth embodiment of the present invention.

FIGS. 12A and 12B are explanatory diagrams showing a forward B position, a forward A position, and a backward position in the fourth embodiment.

FIG. 13 is a front sectional view showing an example of a conventional selection device.

FIG. 14 is an explanatory diagram showing a general shift pattern of a shift lever.

[Explanation of symbols]

 10: Housing 16a: One end face 16b: Other end face 20: Shaft 31: One end part 21: Other end part 24, 40, 51, 61: First spring plate 27, 45, 52, 62: Second spring plate 35, 47 , 55, 65: first spring 36, 48, 56, 66: second spring

Claims (10)

[Claims] 1. A forward movement having a housing, one end and the other end, which is held by the housing so as to be movable at least in the axial direction, and which is moved forward by a select operation and moved to one end side from the forward neutral position.
A shaft which is moved to one of a position, a forward B position which has moved to the other end side from the forward neutral position, and a reverse position which has further moved to the one end side than the forward A position; and A first spring for applying a biasing force toward the forward neutral position to the shaft when moving from the forward neutral position to the forward B position, and when moving from the forward A position to the reverse position; A second spring for applying a biasing force to the shaft toward the forward neutral position when moving from the neutral position to the forward A position, and when moving from the forward A position to the reverse position. Transmission select device with a misselection prevention function. 2. The select device for a transmission having a misselection prevention function according to claim 1, wherein the forward A position is a low gear position, and the forward B position is a high gear position. 3. The selection device for a transmission having a misselection prevention function according to claim 2, wherein the reverse position is located on the opposite side of the forward neutral position with respect to the high speed position or the low speed position. 4. The housing has a shaft hole for holding the shaft movably at least in the axial direction, a first end stopper surface and the other end that house the first spring and the second spring and face each other at a first interval. A side stopper surface, wherein the shaft is movably locked on the shaft at a second interval narrower than the first interval only in a direction approaching each other, and abuts the one end side stopper surface on the back surface. The first spring comprises a compression spring. The first spring comprises a compression spring, and the first spring comprises a compression spring. 4. A shift having a misselect prevention function according to claim 2, wherein the second spring is formed of a compression spring and is disposed between the one end side stopper surface and the other end side spring receiver. Machine select device. 5. When the shaft moves from the forward neutral position to the forward B position, the one end spring receiver comes close to the other end spring receiver abutting on the other end stopper surface, and 5. The selection device for a transmission having a misselection prevention function according to claim 4, wherein one spring is compressed. 6. When the shaft is moved from the forward neutral position to the forward A position, the other end spring receiver is kept in contact with the one end stopper surface until the one end spring receiver contacts the one end stopper surface. 5. The selection device for a transmission having a misselection prevention function according to 4, wherein the second spring is compressed by approaching the second spring. 7. When the shaft moves from the advance A position to the reverse position, the other end spring receiver approaches the one end side stopper surface and the one end side spring receiver which is in contact with the one end side stopper surface. 7. The select device for a transmission having a misselection prevention function according to claim 6, wherein the first spring and the second spring are compressed. 8. When the shaft moves from the forward neutral position to the forward B position, the other end spring receiver comes close to the one end spring receiver abutting on the one end stopper surface, and the second spring receiver is closed. The select device for a transmission having a misselection prevention function according to claim 4, wherein the spring is compressed. 9. When the shaft moves from the forward neutral position to the forward A position, the one end spring receiver is kept in contact with the other end stopper surface until the other end spring receiver contacts the other end stopper surface. 5. A select device for a transmission having a misselection prevention function according to 4, wherein the first spring is compressed by approaching a stopper surface. 10. When the shaft moves from the advance B position to the reverse position, the other end spring receiver approaches the one end side stopper surface and the one end side spring receiver contacting the one end side stopper surface. 10. The select device for a transmission having a misselection prevention function according to claim 9, wherein the first spring and the second spring are compressed.