JPH08226534A - Detent spring structure for auto change - Google Patents

Abstract

PURPOSE: To reduce manufacturing cost such as material cost, machining cost, and assembly cost. CONSTITUTION: A pair of side part claw pieces 42c are cut and raised obliquely on both sides in the direction of width in a tip section of a detent spring 42. A pair of inner side claw pieces 42d in the direction of width protrude in the direction in which the detent spring 42 is extended on the inside of the side claw part piece 42c. The inner side claw piece 42d is bent from its central portion toward a tip section of the side part claw piece to form a pair of bearing spaces in the direction of width by a top face of the side part claw piece 42c and the inner side claw piece 42d. A pair of coaxial roller shafts 43b protrude at both end faces of a roller main body 43a. The roller main body 43a is mounted on the detent spring 42 in a condition in which these roller shafts 43b are fitted into each bearing space.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic change detent spring structure which is applied to a shift lever of an automobile equipped with an automatic change mechanism and is provided for giving a feeling of moderation to the operation of the shift lever.

[0002]

2. Description of the Related Art Conventionally, there has been known a shift lever structure for an automobile provided with an automatic change mechanism having a detent spring as shown in FIG. This shift lever structure has a base plate 1, a shift lever 2 whose base is rotatably supported around a horizontal shaft 25, a base plate 1, a shift lever 2 arranged in parallel with a rotation locus surface of the shift lever 2, and It has a basic configuration including a detent plate 3 fixed to the base plate 1.

The detent plate 3 has a plurality of concave engaging portions 31 continuously provided at its upper edge, and a curve connecting the tops of the concave engaging portions 31 is a projecting curve centered on the horizontal axis 25. Is drawn. The concave engaging portion 3
An elongated hole 32 extending in the lateral direction is formed in the lower part of the elongated hole 1, and a position regulation groove 33 corresponding to a predetermined shift range is sequentially formed in the upper edge portion of the elongated hole 32 in the rotation direction of the shift lever 2. . A stopper 34 projects upward from the upper edge of the front end of the detent plate 3.

A push button 24 is provided on the handle on the top of the shift lever 2.
By pressing the button 23, the pin 23 in the shift lever 2 is moved downward via the center shaft 21, whereby the shift lever 2 can be rotated in the front-rear direction within the range of the elongated hole 32. If the push button 24 is released, The pin 23 is moved upward by the urging force of the coil spring 22, whereby the pin 23 and the position regulating groove 33 are engaged with each other and the shift lever 2 is held at a predetermined shift operation position. At the bottom of the shift lever 2, the bracket 4 is provided with the shift lever 2
It is provided so as to project forward in the rotation direction of, and a support piece 51 of the mission drive cable 5 is attached to the bracket 4. A bent piece 41 bent toward the detent plate 3 is formed on the upper edge of the front end of the bracket 4.

The bent piece 41 includes a detent spring 42 arranged along the upper edge of the detent plate 3.
A 0 base end is attached. As shown in FIG. 6 (exploded perspective view), the detent spring 420 includes a leaf spring 421 which is a spring body, and the leaf spring 421.
And a roller 430 rotatably supported around a support pin 431 attached to the roller support portion 422.

A pair of pin receivers 423 formed by curling the front end of the roller support member 422 project from both sides in the width direction, and a mounting space 424 formed between the pin receivers 423 is projected. The roller 430 is disposed, and the roller 430 is rotatably supported around the support pin 431 with the support pin 431 inserted in the support holes of the pair of pin receivers 423 and the center hole of the roller 430.

Such a roller 430 is adapted to engage with the concave engaging portion 31 by the urging force of the detent spring 420. Then, when the shift lever 2 is rotated, the roller 430 moves over the one concave engaging portion 31 and over the other concave engaging portion 31 to generate a moderation feeling. By engaging the roller 430 with the predetermined position regulation groove 33, the transmission (not shown) is set to a predetermined speed change state.

[0008]

By the way, the conventional detent spring 420 described above is provided with the leaf spring 421 and the roller support portion 422 of the leaf spring 421, although it is a member merely utilizing the urging force thereof. Since the support pin 431 is attached to the support pin 431 and the roller 430 is rotatably supported around the support pin 431, the support pin 431 is attached to the support pin 431. Therefore, an increase in material cost due to the large number of parts cannot be avoided. Had.

Further, the support pin 431 is connected to the roller support portion 42.
Curl pin holder 42 for fixing to 2
3 has to be provided and a central hole through which the support pin 431 is passed must be bored in the roller 430, which causes a problem of high processing cost.

Further, in order to mount the roller 430 in the mounting space 424 of the roller support portion 422, the roller 43
0 in the mounting space 424 with the support pin 431
Through the support hole of the one pin receiver 423, the center hole of the roller 430, and the support hole of the other pin receiver 423, and then caulking the pin receiver 423 so that the support pin 431 does not come off. There was a problem in that the work had to be performed and the assembly cost increased.

The present invention has been made to solve the above problems, and is an automatic change detent spring structure capable of reducing manufacturing costs such as material cost, processing cost and assembly cost. Is intended to provide.

[0012]

The automatic change detent spring structure according to claim 1 of the present invention is provided with a shift lever pivotally supported about a horizontal axis.
A detent spring equipped with a roller is fixed to the tip of this shift lever, and a detent plate is integrally provided on the vehicle body. This detent plate has an arc surface centered on the axis of the horizontal axis at the upper part. A concave engaging portion for engaging the roller is provided on the arc surface, the roller is an auto-change detent spring structure configured to be pressed against the arc surface by the urging force of the detent spring, A pair of first claw pieces spaced apart in the width direction is obliquely cut and raised at the tip end portion of the detent spring, and a pair of second claw pieces in the width direction is provided inside or outside the first claw pieces in a direction in which the detent spring extends. The second claws projectingly project from the first claws and the second claws are bent toward the tip of the first claws.
A pair of bearing spaces surrounded by the claw pieces are formed in the width direction, and the roller is attached to the detent spring in a state of being axially supported by the bearing space.

[0013]

According to the automatic change detent spring structure of the first aspect, the roller itself is provided in a pair of bearing spaces in the width direction surrounded by the first pawl and the second pawl formed at the tip of the detent spring. Alternatively, by fitting the roller shaft provided on the roller, the roller is attached to the tip of the detent spring.

When the roller is attached to the detent spring, the roller shaft is in sliding contact with the first claw piece and the second claw piece, so that the roller can rotate about the roller axis.

[0015]

1 is a perspective view showing an example of a shift lever structure for an automobile to which a detent spring structure according to the present invention is applied, and FIG. 2 is a side sectional view thereof. As shown in these drawings, the shift lever structure includes a base plate 1, a shift lever 2 whose base is rotatably attached to the base plate 1 about a horizontal axis 25, and a plane parallel to the rotation locus of the shift lever 2. And a detent plate 3 fixed to the base plate 1 as a basic structure.

The detent plate 3 has an arcuate surface which forms a protruding curve at the upper edge thereof. This arcuate surface is arranged along an arc centered on the axis of the horizontal shaft 25, and the plurality of concave engaging portions 3 are provided over the entire length in the circumferential direction.
1 is continuously recessed. A long hole 32 extending in the lateral direction is formed in the lower part of the concave engaging portion 31, and the long hole 32 is formed.
A position regulating groove 33 corresponding to each range of P, R, N, D, and L is formed in order from the front side (the left side in the drawing) in the rotation direction of the shift lever 2 at the inner upper edge portion of the.
A stopper 34 is provided on the upper edge of the front end portion of the detent plate 3 so as to project upward.

As shown in FIG. 1, an inner shaft 21 is vertically movable in the hollow portion of the shift lever 2.
1 is biased upward by a coil spring 22. A pair of left and right pins 23 are provided on the lower portion of the center shaft 21 so as to project outward. These pins 23 penetrate the shift lever 2 and are projected to the outside, and one of the pins 23 penetrates the elongated hole 32 in which the position regulating groove 33 is formed so as to be vertically movable.

The center shaft 21 is connected to a push button 24 provided on the head of the shift lever 2, and the push operation of the push button 24 causes the pin 23 to move downward, whereby the shift lever 2 is elongated. It can be rotated about the horizontal axis 25 in the front-rear direction within the range of 32.
The pin 23 and the position regulation groove 33 are engaged with each other by the upward movement by the urging force of the shift lever 2, and the shift lever 2 is held at a predetermined shift operation position.

As shown in FIG. 1, a bracket 4 is provided at the lower portion of the shift lever 2 so as to project forward in the rotational direction of the shift lever 2, and a support piece 51 of a mission drive cable 5 is attached to the bracket 4. Has been. The detent plate 3 is provided on the upper edge of the front end of the bracket 4.
A bent piece 41 that is bent is provided on the side. The bending piece 41 is positioned so as to be located above the arc surface of the detent plate 3.

As shown in FIGS. 1 and 2, a base end of a detent spring 42 arranged along the arc surface of the detent plate 3 is attached to the bent piece 41 by means of screws. At the tip of the detent spring 42, a roller 43 is rotatably supported around a roller shaft 43b. The roller 43 is dimensioned so as to engage with each concave engaging portion 31 of the detent plate 3 and is biased in the direction of engaging with the concave engaging portion 31 by the biasing force of the detent spring 42. There is. The roller 43 and the concave engagement portion 31 are configured so that a sense of moderation is generated at a position corresponding to each position regulation groove 33 when the shift lever 2 is rotated.

Further, as shown in FIG. 2, the bending piece 41 is arranged so as to abut against the stopper 34 of the detent plate 3 when the shift lever 2 is rotated forward. With this stopper 34, the shift lever 2
The rotation range is restricted to the front side (left side), that is, the P range side. Then, as shown by the solid line in FIG. 2, with the bent piece 41 and the stopper 34 stopped, the pin 23 is located in the restriction groove 33a corresponding to the P range of the position restriction groove 33, and its restriction groove 33a. So that the side edge 32a forming the
The mutual positional relationship between the front end of the bending piece 41 and the stopper 34 is set.

FIG. 3 is an exploded perspective view showing an example of the detent spring, and FIG. 4 is an assembled perspective view thereof. As shown in these figures, the detent spring 4
2 is composed of a leaf spring main body 42a, a roller support portion 42b formed at the tip of the leaf spring main body 42a, and a roller 43 supported by the roller support portion 42b. A mounting hole 42e extending in the longitudinal direction is formed in the base end portion of the leaf spring main body 42a. A plurality of screws are inserted into the mounting hole 42e, and the mounting screw 42e is screwed into the bending piece 41. Detent spring 42 by screwing
Are fixed to the bracket 4.

The roller support portion 42b is composed of the leaf spring body 4
The side claw pieces (first section) are cut and raised at both ends of the tip of 2a at an acute angle with respect to the extending direction of the leaf spring main body 42a.
Claw piece) 42c, and a pair of width direction inner claw pieces (second claw pieces) 42d formed inside the pair of side claw pieces 42c. The inner claw piece 42d is formed so as to project outward in the longitudinal direction of the leaf spring body 42a from the bending point of the side claw piece 42c with respect to the leaf spring body 42a, and the tip portion is bent downward at a substantially right angle. .

Then, dimensions are set so that the tip end of the bent inner claw piece 42d and the tip end of the side claw piece 42c come close to each other, and by this dimension setting, the side claw piece 42c is A triangular bearing space 42f surrounded by the inner claw piece 42d is formed. Further, a roller mounting space 42g formed by being cut in a U shape in a plan view is provided between the pair of inner claw pieces 42d in the width direction. Then, in a state where the bearing space 42f is formed,
A gap 42f ', which is slightly narrower than the shaft diameter of the roller shaft 43b described later, is provided between the tip of the side claw piece 42c and the tip of the inner claw piece 42d.

On the other hand, the roller 43 comprises a central roller body 43a and a pair of concentric roller shafts 43b projecting outward from both end surfaces of the roller body 43a. The length of the roller body 43a in the longitudinal direction is set so that it can be mounted in the roller mounting space 42g, and the roller shaft 43b is a bearing in sliding contact with the side claw pieces 42c and the inner claw pieces 42d. Space 42
The diameter is set so that it can be fitted into f. Further, the length of the roller shaft 43b is set to a size that is substantially the total of the width of the inner claw piece 42d and the width of the side claw piece 42c.

The roller 43 is connected to the detent spring 4
When mounting on the second roller support portion 42b, the left and right roller shafts 43b are attached to the side claw pieces 42c and the inner claw pieces 42d.
It is pressed against a gap 42f 'formed at the tip of the bearing and is pressed in the direction of the bearing space 42f. Then, the gap 42
f'is pushed out, the left and right roller shafts 43b are press-fitted into the bearing space 42f, and the roller body 43a is in the state shown in FIG. 4 mounted in the roller mounting space 42g.

By fixing the detent spring 42 to the bent piece 41 of the bracket 4 with a screw through the mounting hole 42e, the roller body 43a is biased by the leaf spring body 42a as shown in FIGS. Thus, the detent plate 3 is engaged with the concave engagement portion 31. By rotating the shift lever 2 around the horizontal shaft 25, the detent spring 42 integrated with the shift lever 2 orbits around the horizontal shaft 25, and by this rotation, the roller body 43a is pressed and the upper surface of the detent plate 3 is rotated. Is moved to fit in another concave engaging portion 31 according to the amount of rotation of the shift lever 2.

The roller shaft 43b is provided with a side claw piece 42c.
And the bearing space 42 formed by the inner claw piece 42d
Since it is slidably fitted in f, the roller body 43
The movement of a on the upper surface of the detent plate 3 ensures that the roller body 43a rotates together with the roller shaft 43b.

According to the above-described structure of the detent spring structure of the present invention, the detent plate is formed of two parts instead of three parts as in the conventional case (FIG. 6), so that the number of parts is small and the material cost is reduced. can do.
Further, unlike the prior art, it is not necessary to form the pin receiver 423 at the tip of the roller supporting portion 422 by curling, and the leaf spring main body 42a and the roller supporting portion 42b can be obtained by pressing the leaf spring material once.
It is not necessary to form a shaft hole in the roller body 43a, and as a result, the manufacturing cost can be reduced.

In the above embodiment, the roller body 43
The roller shafts 43b provided at both ends of the a
The roller shaft 4
The configuration is not limited to the configuration in which 3b is fitted in the bearing space 42f, but the roller body 43a itself is fitted in the bearing space 42f, and instead, flange portions are provided at both ends of the roller body 43a as retaining means. May be provided.

In the above embodiment, a pair of side claw pieces 42c are provided on both sides of the tip of the leaf spring body 42a, and a pair of inner claw pieces 42d are provided inside the side claw pieces 42c. Although provided, the present invention is directed to the inner claw piece 42d.
Are not limited to being provided inside the side claw pieces 42c, and their positions may be interchanged.

[0032]

As described above, in the detent spring structure for an automatic change according to the first aspect of the present invention, a pair of first claw pieces spaced apart in the width direction is obliquely cut and raised at the tip of the detent spring. A pair of width-direction second claw pieces are provided inside or outside of the first claw pieces so as to project in the direction in which the detent spring extends, and these second claw pieces are bent toward the tip of the first claw piece. A pair of bearing spaces surrounded by the first claw pieces and the second claw pieces are formed in the width direction, and the rollers are attached to the detent spring while being axially supported by the bearing spaces.

Therefore, the detent spring structure of the present invention is composed of two parts, a leaf spring and a roller, as compared with the conventional one which is composed of three parts of a leaf spring, a roller and a roller shaft. Therefore, the number of parts is reduced and the material cost is reduced.

Further, the leaf spring main body and the roller supporting portion of the detent spring can be easily manufactured by a single press working on the spring material, and the tip end portion of the leaf spring main body is curled as in the conventional case. There is no need to perform the troublesome operation of forming a bearing.

Further, since the roller itself or the roller shaft provided on the roller is fitted into the bearing space and the roller is attached to the detent spring, a shaft hole for fitting the roller shaft in the center of the roller is bored as in the conventional case. You do not have to do the troublesome drilling work.

In addition, at the time of assembling the roller, the roller plate is simply pressed by inserting the roller shaft into the bearing space through the gap formed between the tip of the first pawl and the tip of the second pawl. It is not necessary to perform a troublesome work such as crimping a curled bearing in which a roller shaft is fitted, which is attached to a spring body.

As described above, the detent spring structure of the present invention has a lower material cost than the conventional structure and is easy to process and assemble, so that it is extremely effective in reducing the manufacturing cost of the detent spring. It is valid.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a shift lever structure for an automobile to which a detent spring structure according to the present invention is applied.

FIG. 2 is a side sectional view of the shift lever structure of FIG.

FIG. 3 is an exploded perspective view showing an example of a detent spring structure according to the present invention.

FIG. 4 is an assembled perspective view of the detent spring structure of FIG.

FIG. 5 is a perspective view showing an example of a shift lever structure for a vehicle to which a conventional detent spring structure is applied.

FIG. 6 is an exploded perspective view showing an example of a conventional detent spring structure.

[Explanation of symbols]

 1 Base Plate 2 Shift Lever 21 Center Shaft 22 Coil Spring 23 Pin 3 Detent Plate 31 Concave Engagement Part 32 Long Hole 33 Position Restriction Groove 4 Bracket 41 Bending Piece 42 Detent Spring 42a Leaf Spring Body 42b Roller Support 42c Side Claw Piece (First 42d Inner claw piece (second claw piece) 42f Bearing space 42f 'Gap 43 Roller 43a Roller body 43b Roller shaft 5 Mission drive cable 51 Support piece

Claims (1)

[Claims] 1. A shift lever rotatably supported about a horizontal axis is provided, a detent spring equipped with a roller is fixed to the tip of the shift lever, and a detent plate is provided integrally with the vehicle body. The detent plate has an arcuate surface centered on the axis of the horizontal shaft at the top, and a concave engagement portion with which the roller engages is provided on the arcuate surface. An automatic change detent spring structure configured to be pressed against and brought into contact with an arcuate surface, wherein a pair of first claw pieces spaced apart in the width direction are obliquely cut and raised at a tip end portion of the detent spring. 1
A pair of second claw pieces in the width direction is provided inside or outside the claw piece so as to project in the extending direction of the detent spring.
The claw piece is bent toward the tip end portion of the first claw piece, and a pair of bearing spaces surrounded by the first claw piece and the second claw piece are formed in the width direction, and the roller is arranged in the bearing space. Auto change detent spring structure characterized by being attached to the detent spring in a supported state