JP3083743B2 - Operation lever mechanism for transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission operating lever mechanism, and more particularly to a transmission operating lever mechanism that is reduced in size and cost.

[0002]

2. Description of the Related Art Conventionally, an operation lever mechanism for a transmission for changing a transmission ratio of a transmission is attached to a steering column of an automobile. In this transmission operation lever mechanism, a driver of an automobile operates an operation lever disposed near a steering wheel to adjust a transmission ratio of a transmission that transmits rotation from an engine to driving wheels to a traveling state. Can be changed. Japanese Patent Laying-Open No. 7-243515 discloses a conventional example of this operation lever mechanism for a transmission. 3 and 4 show a conventional example of the transmission operation lever mechanism. FIG. 3 shows the entire conventional example, and FIG.
3 shows a cross-sectional structure of a main part viewed from the back side of FIG.

In FIGS. 3 and 4, a base bracket 50 is fixed to a steering column 70 as an operation lever mechanism for a transmission of an automatic transmission. On the base bracket 50, a checker cam 51 as a fixing member having irregularities for restricting movement of the select lever 60 between ranges is fixed by bolts 52,53. The select lever 60 is fixed to a fork member 61, and a claw 62 is formed on the fork member 61. Nail 6
The coil spring 63 is urged by a coil spring 63 so as to engage with the unevenness of the checker cam 51 (corresponding to parking (P), reverse (R), neutral (N), three-speed drive (D3), etc.). Therefore, the select lever 60 is operated against the urging force of the coil spring 63 to operate the claw 62.
By changing the position at which the checker cam 51 comes into contact with the unevenness of the checker cam 51, the gear ratio of the automatic transmission can be changed.

[0004]

However, in the above-mentioned conventional example, the checker cam 51 is usually formed of a sintered metal, a steel plate or the like, and is a separate component from the base bracket 50. 50
, The cost of the checker cam 51 itself is high, miniaturization is difficult, accuracy is difficult to obtain, and assembly costs are high. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a transmission operation lever mechanism that is small in size, low in cost, and high in accuracy, eliminating the above-mentioned disadvantages.

[0005]

In order to solve the above-mentioned problems, a first invention of the present application has a structure in which a select lever is operated.
In the transmission operating lever mechanism for changing the transmission ratio of the transmission, the first checker cam for selecting the transmission ratio is formed at the edge of the opening of one side plate of the base bracket, and the second checker cam for selecting the transmission ratio is used. Checker cam is formed on the end of the other side plate of the base <br/> scan bracket, select
A first holder fixed to the one side plate is a lever holder.
To the shaft and the second shaft fixed to the other side plate.
More pivotally supported, with the select lever shaft in front
The selector lever is fixed to the
The bar is rotatably supported by the select lever shaft.
Is lifting, the first engagement claw and the second engaging claw is said select lever
It is attached to over, the second check and the first checker cam
The car cam is a pair and the first checker
The car cam and the second checker cam are in opposite directions,
The first engagement claw is engageable with the first checker cam, the second engagement claw is engageable with the second checker cam , and the first engagement claw is connected to the first checker cam.
And the second engagement pawl is biased toward the second checker cam.
A spring is provided for biasing the selector lever.
ー around the select lever shaft
Engagement and engagement between the first engagement claw and the first checker cam
And releasing the second engagement claw and the second checker cover.
Engage and disengage with the
Rotating around the first and second shafts,
The engaging claw is moved to a predetermined position of the first checker cam.
And the second engagement claw is moved to a predetermined position of the second checker cam.
Moving to a position .

According to the first aspect of the present invention, the speed ratio
The first checker cam for selection is one of the base brackets
The second gear for selecting the gear ratio is formed at the edge of the opening of the side plate.
The edger cam is at the end of the other side plate of the base bracket.
And the first checker cam and the second checker cam.
The car cam is a pair and the first checker
The car cam and the second checker cam are in opposite directions.
Further, the select lever holder is fixed to the one side plate.
Fixed to the fixed first shaft and the other side plate.
Rotatably supported by the second shaft, the select lever
-The shaft is fixed to the select lever holder,
The select lever is connected to the select lever shaft.
The first engagement claw and the second engagement claw are forwardly rotatable.
The first engaging claw is attached to the select lever.
1 can be engaged with the checker cam, and the second engagement claw is
The second checker cam can be engaged with the second checker cam.
Rotate the lect lever around the select lever shaft.
To rotate the first engagement claw and the first checker cam.
And the second engagement claw and the second checker cam
At the same time, the first engagement claw and the first checker
Release of engagement with the cam and the second engagement claw and the second hook
At the same time, release the engagement with the
Rotate the lever around the first and second shafts
The first engagement claw is positioned at a predetermined position on the first checker cam.
To move the second engagement claw to the second checker cam.
Can be moved to a predetermined position. Because of this,
Select the transmission gear ratio by operating the select lever.
Can be At this time, the first engagement claw is
The second engagement pawl is urged to the side of the
A spring that biases the checker cam is provided.
Therefore, the first engagement claw is separated from the first checker cam.
And release the second engagement claw from the second checker cam.
In some cases, the select
The lever around the select lever shaft.
Will be done.

[0007]

[0008]

FIG. 1 shows an embodiment of the present invention, and FIG. 2 shows an exploded state of the embodiment. 1 and 2, the base bracket 10 is fixed to a steering column cover (not shown) by bolts (not shown) via mounting holes 11b and 14a. The steering column cover is a member that covers the upper portion of the steering column tube 40. The outer shape of the base bracket 10 includes an upper plate 11, a front side plate 12 shown, and a rear side plate 1 shown.
3 and the bottom plate 14.

An opening 11a and the mounting hole 11b are formed in the upper plate 11 of the base bracket 10. An opening 12a, a first checker cam 12b, a circular hole 12c, and square holes 12d and 12e are formed in the illustrated front side plate 12 of the base bracket 10. The first checker cam 12b is an uneven portion formed at the edge of the opening 12a, and is used for parking (P), reverse (R), neutral (N), and third-speed drive (D) of an automatic transmission (not shown).
3) Consisting of irregularities corresponding to the second speed drive (D2) and low (L). The holes 12c, 12d, and 12e are for fixing a holder shaft 15 described later to the side plate 12.

Second checker cam 13b, circular hole 13c
And square holes 13d and 13e are formed in the illustrated rear side plate 13 of the base bracket 10. The second checker cam 13b has the same structure as the first checker cam 12b, and is formed substantially in the opposite direction to the first checker cam 12b. The holes 13c, 13d, and 13e are for fixing a holder shaft 16 described later to the side plate 13. The mounting hole 14a is formed in the bottom plate 14. The holder shaft 15 includes a shaft body 15a and claws 15b, 15 protruding on both sides of the end of the shaft body 15a.
c. The shaft body 15a fits into the hole 12c,
The claw 15b engages with the hole 15d, and the claw 15c engages with the hole 12e. The holder shaft 16 includes a shaft body 16a.
And claws 1 protruding on both sides of the end of the shaft body 16a
6b and 16c. The shaft body 16a has a hole 13c.
, The claw 16b engages with the hole 13d, and the claw 16c engages with the hole 13e. At this time, the shaft main body 15a is inserted through a circular hole 32a of a select lever holder 30, which will be described later, and the shaft main body 16a is connected to the select lever holder 3.
0 circular hole 33a is inserted. For this reason, the select lever holder 30 is rotatably supported by the shaft main bodies 15a and 16a.

The select lever 20 is an operation lever.
A bearing 24 is formed at the base of the select lever 20. 24a is the upper end of the bearing 24 in the figure,
Reference numeral 4b denotes a lower end portion of the bearing 24 in the figure. The knob 26 is mounted so as to cover the tip of the select lever 20. A boss 21 is formed on the select lever 20 near the bearing 24. The first engaging claw 22 is the illustrated front side plate 2 of the boss 21.
1a, and a second engaging claw 23 is attached to the illustrated rear side plate of the boss 21. The return spring 25 is a coil spring. The return spring 25 is mounted on the bearing 2.
4 is inserted into the bearing 24 so that the lower end portion 24b of the coil 4 passes through the coil-shaped main body 25a. One end 25b of the return spring 25 is disposed so as to abut on the side surface 21a of the boss 21.
5c is a bottom plate 3 of a select lever holder 30 described later.
4 is disposed so as to contact the side surface 34a.

The select lever holder 30 includes the upper plate 3
1, a square frame composed of a side plate 32, a side plate 33, and a bottom plate 34. A circular hole 31a is formed in the upper plate 31, and a circular hole 3a is formed.
2 a is formed in the side plate 32, a circular hole 33 a is formed in the side plate 33, and a circular hole (not shown) is formed in the bottom plate 34. The hole 31a and the circular hole of the bottom plate 34 are a pair, and the hole 32a and the hole 33a are a pair. The select lever shaft 35 includes a shaft body 35.
a and a flange 35b attached to the shaft main body 35a, and is mounted so as to pass through the hole 31a, the circular hole of the bottom plate 34, and the bearing 24. At this time, the bearing 24 is disposed inside the select lever holder 30, and the diameter of the flange 35b is formed larger than the diameter of the circular hole of the bottom plate 34. The select lever holder 30 and the select lever shaft 35 can be fixed by the bush nut 36 to be screwed and the flange 35b.

For this reason, the select lever 20 is rotatably supported by the select lever shaft 35. The return spring 25 moves the first engagement claw 22 to the first position.
The second engagement claw 23 is urged toward the second checker cam 13b side. When the gear ratio of the transmission is changed by the select lever 20, the first and second engagement claws 22, 23 are moved against the first and second checker cams 12b, 12b, 1 against the urging force of the return spring 25.
3b, the selector lever 20 is rotated around a select lever shaft 35, and further, the select lever 20 is rotated around the shaft bodies 15a, 16a of the holder shafts 15, 16, so that the first and second engaging members are rotated. The first and second checker cams 12b, 1
3b, the first and second engaging claws 22 and 23 are moved to the first and second checker cams 12b and 12b.
The selector lever 20 is rotated around the select lever shaft 35 so as to engage with the lever 3b.

With the above configuration, the first and second checker cams 12b and 13b for selecting a gear ratio are formed integrally with the base bracket 10, so that the first and second checker cams 12b and 13b are separated from the base bracket 10. It is not necessary to form the base bracket 10 with the base bracket 10 with bolts or the like. For this reason, the assembly process of the transmission operation lever mechanism is simplified, and the cost is reduced. Furthermore, since there is no mounting error in the positions of the first and second checker cams 12b and 13b, the accuracy of the positions of the first and second checker cams 12b and 13b is improved, and the first and second engagement claws 22 and 23 are provided.
And the first and second checker cams 12b and 13b can be easily engaged.

Further, a first checker cam 12b is formed at a first predetermined position of the base bracket 10, and a second checker cam 13b is formed at a second predetermined position of the base bracket 10 in a direction substantially opposite to the first checker cam 12b. The first engagement claw 22 and the second engagement claw 23 are attached to the select lever 20, and the first engagement claw 22 can be engaged with the first checker cam 12b. 23 is the second
Since the selectable cam can be engaged with the checker cam 13b, by operating the select lever 20 so as to change the angle between the select lever 20 and the base bracket 10, the engagement between the first engagement claw 22 and the first checker cam 12b is achieved. And the second
The engagement between the engagement claw 23 and the second checker cam 13b can be performed simultaneously, and further, the first engagement claw 22 and the first checker cam 1b can be engaged.
2b and the engagement between the second engagement claw 23 and the second checker cam 13b can be simultaneously released. Therefore, the first and second engagement claws 22 and 23 and the first and second checker cams 12b and 12b are operated by operating the select lever 20.
3b, the gear ratio of the transmission can be selected by operating the select lever 20.

Further, a base bracket 1 usually made of synthetic resin
0 is used. In this case, since the first and second check cams 12b and 13b are used as a pair, the pair of check cams 12b and 13b
It is possible to maintain almost the same strength as a metal checker cam as in the conventional example. Further, the first checker cam 12
b is the opening 1 of one side plate 12 of the base bracket 10
2a, and the second checker cam 13b is formed at the end of the other side plate 13 of the base bracket 10, so that the second checker cam 13b is connected to the first checker cam 1
2b is easy to be formed almost in the opposite direction, and
The strength of the first checker cam 12b can be maintained. Since the second checker cam 13b is formed at the end of the side plate 13, the strength of the second checker cam 13b is equal to or higher than that of the first checker cam 12b. In the above embodiment, the select lever of the automatic transmission is used. However, the present invention is not limited to this, and the present invention is also applicable to a shift lever of a non-automatic transmission.

[0017]

As described in detail above, the first aspect of the present invention is as follows.
According to the invention, the transmission operation lever mechanism that changes the transmission gear ratio by operating the select lever can be reduced in size and improved in accuracy . Further, it becomes easy to form a transmission operation lever mechanism. Furthermore, the gear ratio selection
1st and 2nd checker cam integrated with base bracket
Because it is formed, the first and second checker cams are based
Formed separately from the bracket and bolted to the base bracket
Since there is no need to assemble due to factors such as
The assembly process of the mechanism is simplified and the cost is reduced. Change
In addition, there is no mounting error in the positions of the first and second checker cams.
Therefore, the accuracy of the positions of the first and second checker cams is better.
And the first and second engagement claws and the first and second checkers
The engagement with the cam becomes easy. In addition, synthetic resin
Brackets are used, in this case the first
And the second checker cam is used as a pair
It is almost the same as a metal checker cam like the conventional example
Strength can be maintained.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is an exploded view of the embodiment.

FIG. 3 is a perspective view of a conventional example.

FIG. 4 is a cross-sectional view of a main part viewed from the back side of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Base bracket 12, 13 Side plate of base bracket 12a Opening 12b 1st checker cam 13b 2nd checker cam 20 Select lever 22 1st engaging claw 23 2nd engaging claw

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60K 20/00-20/08 F16H 59/00-59/12 G05G 1/00-25/04

Claims (1)

(57) [Claims] 1. A transmission operation lever mechanism for changing a transmission gear ratio by operating a select lever , wherein the first gear ratio selection checker cam is formed at an edge of an opening of one side plate of a base bracket. is, the gear ratio second checker cam selection is formed at an end portion of the other side plate of the base bracket, the select lever holder, fixed to said side plate
A first shaft and a second shaft fixed to the other side plate.
The shaft is rotatably supported by a shaft , and the select lever shaft is connected to the select lever holder.
And the select lever is connected to the select lever shaft.
A first engagement claw and a second engagement claw are attached to the select lever, and the first checker cam and the second checker cam are
A pair, and the first checker cam and the
The second checker cam is opposite a first engagement claw is engageable with the first checker cam, a second engaging claw is engageable with the second checker cam, wherein Urging the first engagement claw toward the first checker cam,
The second engagement claw is biased toward the second checker cam.
A spring is disposed, and the select lever is turned by the rotation of the select lever shaft.
To rotate the first engagement claw and the first checker cover.
With the second engagement claw and the release of the engagement with the second engagement claw.
Engage and disengage with the second checker cam, and rotate the select lever around the first and second shafts.
To rotate the first engagement claw to the first checker cam.
, And the second engagement claw is moved to the second position.
An operation lever mechanism for a transmission, wherein the operation lever mechanism is moved to a predetermined position of a hacker cam .