JPH0891078A - Holding mechanism for detent pin of select lever device in automatic transmission vehicle - Google Patents

Abstract

PURPOSE: To provide a detent pin holding mechanism for a select lever device in an automatic transmission vehicle in which the detent pin can be held by a detent rod with effective force in a simpler structure. CONSTITUTION: Elastic branch parts 28a are provided at the tip end of a detent rod 28. While a detent pin 24 is held between the elastic branch parts 28a, a spring 29 is fitted to the outer periphery of the connecting part 31d of the mutually overlapped elastic branch parts 28a. A recessed part 31b for engagement into which a protrusion 30 provided in the detent pin 24 is fitted is provided between overlapped and opposed faces in the tip ends of leg parts 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a select lever device for an AT vehicle (vehicle equipped with an automatic transmission) capable of establishing a desired shift range by swinging the select lever between a plurality of shift ranges, and more particularly,
In a select lever device of an AT vehicle equipped with a detent pin that penetrates the select lever and is guided by a guide fixed to the vehicle body to restrict swing of the select lever to a desired shift range, interlocks with operation of a knob button. The present invention relates to a detent pin holding mechanism that holds a detent pin at the tip of a detent rod that moves inside a select lever.

[0002]

2. Description of the Related Art A select lever device is provided with a select lever erroneous operation preventing mechanism for preventing the select lever from entering a reverse shift during forward traveling, for example. This select lever erroneous operation prevention mechanism includes, as shown in FIGS. 6 and 7, a detent pin 11 that interlocks with the swing of the select lever 10 and the detent pin 11.
And a fixed guide 12 facing each other, and the protrusion 13 on the guide 12 and the detent pin 11 are engaged with each other to restrict the movement of the detent pin 11, thereby preventing the select lever 10 from swinging. .

In order to release the rocking prevention of the select lever 10 in this select lever erroneous operation prevention device, the knob button 14 provided on the select lever 10 is pressed to separate the detent pin 11 from the guide 12. It suffices to release the engagement. Knob button 14
When is pressed, the detent rod 15 moves in the select lever 10. The detent pin 11 is held at the tip of the detent rod 15, and the movement of the detent rod 15 causes the detent pin 11 and the raised portion 13 to disengage. When the operation of the knob button 14 is released, the detent rod 15 is moved by the urging force of the spring 16 in the direction of returning to the original position so that the detent pin 11 faces the guide 12.

[0004]

By the way, conventionally, in order to hold the detent pin at the tip of the detent rod, it has been widely practiced to press the detent pin into the detent rod. When performing press-fitting, first insert the detent rod into the moving passage inside the select lever. Then, the detent pin is press-fitted into the detent rod so as to penetrate the pin window (reference numeral 17 in FIGS. 6 and 7) provided on the outer peripheral wall of the select lever. At this time, the reason why the detent pin penetrates the select lever and projects is that the detent pin needs to reach a guide fixed to the vehicle body side.

However, the operation of press-fitting the pin after inserting the detent rod has the following drawbacks. If the detent pin is to be press-fitted tightly, since the detent rod is already assembled to the select lever, the strong press input applied to the detent rod cannot be sufficiently supported, and the press-fitting operation becomes difficult. On the other hand, if the press-fitting force is weakened too much, the detent pin is likely to rattle, and the detent pin may come off.

In order to overcome such a drawback, for example, a detent pin holding mechanism disclosed in Japanese Utility Model Laid-Open No. 6-32152 has been proposed. As shown in FIG. 6, this holding mechanism includes a pin holder 18 inserted into the tip of the detent rod 15. An engaging recess 11a is provided on the outer circumferential surface of the detent pin 11, and the tip 18a of the pin holder 18 is brought into contact with the engaging recess 11a of the detent pin 11 inserted into the detent rod 15 to loosen the detent pin 11. It prevents contact.

However, even in this detent pin holding mechanism, the pin holder increases the number of parts and the number of assembling steps, and the engaging recess cannot be deepened from the viewpoint of the strength of the detent pin, and the holding force is slightly weak. There is such a problem.

The present invention has been made in view of the above circumstances, and it is possible to hold the detent pin on the detent rod with a simpler structure and a reliable holding force.
An object of the present invention is to provide a detent pin holding mechanism for a select lever device in a T car.

[0009]

In order to achieve the above object, according to the invention as set forth in claim 1, a select lever swinging between a plurality of shift ranges and a penetrating the select lever are provided on the vehicle body side. A detent pin that regulates the swing of the select lever to a desired shift range while being guided by a fixed guide, and holds this detent pin at the tip,
A detent rod that moves in the select lever in conjunction with the operation of the knob button and a spring that biases the detent rod so that the detent pin faces the guide are provided, and the detent is resisted against the biasing force of the spring based on the operation of the knob button. In the select lever device of the AT car that moves the rod and releases the regulation of the detent pin,
An elastic bifurcation is provided at the tip of the detent rod, and the spring is fitted to the outer circumference of the leg ends of the elastic bifurcations that are overlapped with each other while the detent pin is sandwiched between the elastic bifurcations. There is provided a detent pin holding mechanism for a select lever device of an AT vehicle, characterized in that an engaging recess into which a protrusion provided on the detent pin is fitted is provided between opposed surfaces to be overlapped with each other.

According to a second aspect of the invention, in addition to the structure of the first aspect, the detent rod including the elastic forked portion is formed of synthetic resin.

[0011]

According to the structure of the first aspect of the present invention, after inserting the detent rod into the select lever, the detent pin is advanced into the elastic bifurcation at the tip of the detent rod in order to penetrate the select lever. When the protrusion of the detent pin fits in the engaging recess, the outer periphery of the elastic bifurcated portion is restrained by the spring connected to the detent rod. Not only is the detent pin easily attached to the detent rod, but the detent pin is held securely.

According to the second aspect of the present invention, the detent rod including the elastic forked portion can be easily integrally formed of synthetic resin.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a select lever device for an AT vehicle having a detent holding mechanism according to the first embodiment of the present invention. The select lever device SE includes a housing 20 fixed to the vehicle body. The housing 20 supports a select lever 22 that swings around a support shaft 21. A knob 23 that covers the select lever 22 is attached to the tip end side of the select lever 22 that projects from the housing 20. As is well known, by swinging the select lever 22, the parking range "P", the reverse range "R", the neutral range "N", the drive range "D", and the second range "2" are stepwise.
And the low range “L” is established (see FIG. 7).

The select lever device SE includes a known select lever erroneous operation prevention device SS. The select lever erroneous operation prevention device SS includes a detent pin 24 that interlocks with the swing of the select lever 22 and a guide 25 that is integrally molded with the housing 20 and that faces the detent pin 24.
With. Raised part on guide 25 and detent pin 2
4 is engaged to regulate the movement of the detent pin 24,
This prevents the select lever 22 from swinging.

The detent pin 24 is the select lever 22.
Is supported so that it can move up and down in the axial direction. That is, in the movement passage 26 inside the select lever 22, a detent rod 28 that moves up and down in the axial direction of the select lever 22 in response to the pressing operation of the knob button 27 is provided with the select lever 22.
Is inserted from above (knob button 27 side). The detent pin 24 is supported on the tip of the detent rod 28 by a detent pin holding mechanism according to the present invention described later. A spring 29 for urging the detent rod 28 upward is installed between the lower closed portion of the moving passage 26 and the tip of the detent rod 28. This spring 2
The detent pin 24 faces the guide 25 by the biasing force of 9. In order to release the rocking prevention of the select lever 22, the knob button 27 is pressed and the detent pin 24 integrated with the detent rod 28 is separated downward from the guide 25 against the biasing force of the spring 29.
The engagement between the raised portion on the guide 25 and the detent pin 24 is released, and the select lever 22 can be swung.
When the operation of the knob button 27 is released, the detent rod 28 is moved by the urging force of the spring 29 in the direction of returning to the original position so that the detent pin 24 faces the guide 25.

Next, a detent pin holding mechanism DH for holding the detent pin 24 at the tip of the detent rod 28.
Will be explained. As is clear from FIG. 3, the detent pin 24 is a flat plate in which one corner of a square is cut off. Detent pin 2 by cutting off one corner
We are trying to reduce the weight while maintaining the strength of 4. A protrusion 30 is provided on the long side of the cut-off rectangle.

The detent rod 28 integrally formed of synthetic resin has an elastic forked portion 28a at its tip. The elastic forked portion 28a includes a pair of leg portions 31 facing each other, and the holding grooves 3 for holding the detent pin 24 in cooperation with each other on the respective facing surfaces of the leg portions 31.
1a and a through groove 31b which is continuous with the holding groove 31a and cooperates with each other to form an engaging recess for receiving the projection 30 are provided. The detent pin 24 is sandwiched between the holding grooves 31a with the outer periphery thereof being in close contact with the holding grooves 31a (see FIG. 2).
reference). This reduces rattling of the detent pin 24 as much as possible. In addition, the projection 30 of the detent pin 24
Engages in the engaging recess 31b, so that the detent pin 2
4 is prevented from coming off in the lateral direction. Moreover, since the protrusion 30 is provided on the side of the detent pin 24, it is possible to prevent the strength of the detent pin 24 from lowering as compared with the case where the engaging recess is provided. As is apparent from FIG. 4, when inserting the detent pin 24 between the holding grooves 31a from the lateral direction, the legs 30 are opened by using the protrusion 30 entering the engaging recess 31b to open both legs 31. 31 is a cam surface 31c
Is formed.

A connecting portion 31d is formed at the tip of the leg portion 31 and is fitted into the upper end of the spring 29 in a state where the both leg portions 31 are completely overlapped. When the connecting portion 31d is fitted into the spring 29, the both leg portions 31 cannot be opened. Since the existing spring 29 is used to restrain the leg portions 31, the number of parts does not increase.

In this case, it is desirable that the pin window 32 of the select lever 22 has such a size that the entire elastic forked portion 28a can be seen.

The operation of the first embodiment will be described. In order to assemble the detent pin 24 to the detent rod 28, first, before attaching the knob 23 to the select lever 22, from the upper opening portion of the moving passage 26 inside the select lever 22, the spring 29, and then the detent rod 2 are attached.
Insert 8. At a position where the connecting portion 31d of the elastic forked portion 28a is not fitted into the spring 29, the select lever 2
The detent pin 24 is inserted between the holding grooves 31a of the both leg portions 31 from the lateral direction through the second pin window 32. When the detent pin 24 is pushed forward, the projection 30 pushes the cam surface 31c and pushes the legs 31 apart. As a result, the projection 30 is engaged with the engaging recess 31b while releasing the elastic forked portion 28a.
Enter. In this way, the detent pin 24 becomes the pin window 3
Penetrate the select lever 22 through 2.

Subsequently, the select lever 22 is inserted into the housing 20 from below, and the select lever 22 is attached to the housing 20 via the support shaft 21. The knob 23 is attached to the tip of the select lever 22 protruding from the housing 20.
Attach from above. At this time, the detent rod 28 is pushed downward by the pressing force for fitting, and the connecting portion 31d fits into the tip of the spring 29. This state is the pin window 32 of the select lever 22.
Can be observed from. In this way, the select lever device is completed.

Detent pin holding mechanism D according to the present invention
According to H, the detent pin 28 is attached to the detent rod 28.
4 when inserting the elastic forked portion 2 of the detent rod 28
The insertion operation is easy because 8a easily spreads. Moreover, after the detent pin 24 is inserted, the connecting portion 31
Since the spring 29 is fitted around the outer periphery of d, even if an operating force is applied to the detent pin 24, the elastic forked portion 28a
Does not spread. Therefore, although the detent pin 24 can be inserted into the detent rod 28 by a simple and simple operation, the number of parts is not increased,
With a simple structure, the detent pin 24 can be reliably held at the tip of the detent rod 28.

To remove the detent pin 24, a tool such as a screwdriver is inserted through the pin window 32 and the spring 29 is pushed down to release the connection between the connecting portion 31d and the spring 29. After that, if you pull out the detent pin 24,
The detent pin 24 can be easily removed. Therefore, maintenance and the like can be easily performed.

FIG. 5 shows a second embodiment of the select lever device having the detent pin holding structure of the present invention. The second embodiment is characterized in that the knob 23 is previously integrally attached to the select lever 22. Therefore,
Unlike the first embodiment, when the select lever 22 is assembled to the housing 20, the select lever 22 must be inserted into the housing 20 from above the housing 20. In addition, regarding the same structure as the first embodiment,
The same reference numerals as those in the first embodiment are attached and detailed description thereof is omitted.

Select lever device SE according to the second embodiment
To assemble, first, the detent rod 28 is inserted into the moving passage 26 from the lower opening 33 of the select lever 22. Then, the detent pin 2 through the pin window 32.
4 is sandwiched between the elastic forked portions 28a. The spring 29 is further inserted into the moving passage 26 through the lower opening 33, and the connecting portion 31
Insert d into the tip of the spring 29. Here, once lift the lower end of the spring 29 with a jig or the like,
In this state, the select lever 22 is inserted into the housing 20 from above the housing 20. Subsequently, the support shaft 21 is inserted into the lower end of the select lever 22, and the select lever 22 is swingably supported by the housing 20.
If the jig is removed, the lower end of the spring 29 will be the support shaft 21.
Supported by.

Therefore, even in the case of the second embodiment, the detent pin 24 can be inserted into the detent rod 28 by a simple and simple operation, but the number of parts is not increased and the construction is simple. The detent pin 24 can be reliably held at the tip of the detent rod 28.

[0028]

As described above, according to the first aspect of the present invention, the detent pin can be inserted into the detent rod by a simple and simple operation, but the number of parts is not increased and the detent pin is simple. With such a configuration, the detent pin can be reliably held at the tip of the detent rod.

According to the second aspect of the invention, it is possible to easily provide the detent rod including the elastic forked portion.

[Brief description of drawings]

FIG. 1 shows a first embodiment of a select lever device for an AT vehicle including a detent pin holding mechanism according to the present invention. It is a front sectional view.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is an exploded perspective view of a detent pin and a detent rod.

4 is a sectional view taken along line 4-4 of FIG.

FIG. 5 shows a second embodiment of a select lever device for an AT vehicle having a detent pin holding mechanism according to the present invention. It is a front sectional view.

FIG. 6 shows a select lever device of an AT vehicle having a conventional detent pin holding mechanism. It is a front sectional view.

7 is a sectional view taken along line 7-7 of FIG.

[Explanation of symbols]

 22 Select Lever 24 Detent Pin 27 Knob Button 28 Detent Rod 28a Elastic Bifurcation 29 Spring 30 Protrusion 31 Leg 31b Through Groove Forming Engagement Recess

Claims (2)

[Claims] 1. A select lever that swings between a plurality of shift ranges and a swing of the select lever to a desired shift range while being guided by a guide fixed to the vehicle body through the select lever. A detent pin, a detent rod that holds this detent pin at the tip and moves in the select lever in conjunction with the operation of the knob button, and a spring that biases the detent rod so that the detent pin faces the guide are provided. AT that releases the regulation of the detent pin by moving the detent rod against the biasing force of the spring based on the operation
In a select lever device for a vehicle, an elastic bifurcation is provided at the tip of the detent rod, and the spring is fitted to the outer periphery of the leg ends of the elastic bifurcated parts that are overlapped with each other while the detent pin is sandwiched between the elastic bifurcation. In addition, a detent pin holding mechanism for a select lever device of an AT vehicle, characterized in that an engagement recess into which a protrusion provided on the detent pin is fitted is provided between opposed surfaces of the ends of the legs that are overlapped with each other. 2. The detent rod including the elastic forked portion is molded from synthetic resin.
The detent pin holding mechanism of the select lever device of the AT vehicle described.