JPH09119514A - Operating lever mechanism for transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize an operating lever mechanism for a transmission and reduce the cost thereof. SOLUTION: In an operating lever mechanism for a transmission for change the speed change ratio of a transmission by an operating lever 20, a first checker cam 12b for selecting the speed change ratio is formed on the first prescribed position of a base bracket 10, a second checker cam 13b for selecting the speed change ratio is formed on the second prescribed position of the base bracket 10 in a direction nearly reverse to the first checker cam 12b, a first engaging tooth 22 and a second engaging tooth 23 are provided aside of the operating lever 20, the first engaging tooth 22 is engaged with the first checker cam 12b, and the second engaging tooth 23 is engaged with the second checker cam 13b. The first checker cam 12b is formed on the rim of the opening part 12a of one side plate 12 of the base bracket 10, and the second checker cam 13b is formed on the end part of the other side plate 13 of the base bracket 10.

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 downsized and reduced in cost.

[0002]

2. Description of the Related Art Conventionally, a steering column of an automobile is provided with a transmission operation lever mechanism for changing a transmission gear ratio. In this transmission operation lever mechanism, the driver of the vehicle operates the operation lever arranged near the steering wheel to adjust the transmission gear ratio to transmit the rotation from the engine to the drive wheels according to the running state. Can be changed. Japanese Unexamined Patent Publication No. 7-243515 discloses a conventional example of this transmission operation lever mechanism. 3 and 4 show a conventional example of the transmission operation lever mechanism. Incidentally, FIG. 3 shows the whole of the conventional example, and FIG.
Shows a cross-sectional structure of a main part viewed from the back side of FIG.

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

[0004]

However, in the above-mentioned conventional example, the checker cam 51 is usually formed of sintered metal, a steel plate or the like, is a component different from the base bracket 50, and is fixed by the bolts 52 and 53. Fifty
Since the checker cam 51 itself is fixed, the cost of the checker cam 51 itself increases, it is difficult to reduce the size, it is difficult to obtain accuracy, and the assembly cost increases. Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks, to provide a transmission operation lever mechanism which is small in size and low in cost and has high accuracy.

[0005]

In order to solve the above-mentioned problems, the structure of the first invention of the present application is a transmission operation lever mechanism for changing a gear ratio of a transmission by an operation lever.
The first gear ratio selection checker cam is formed at a first predetermined position of the base bracket, and the second gear ratio selection second checker cam is formed.
A checker cam is formed at a second predetermined position of the base bracket in a direction substantially opposite to the first checker cam,
A first engagement claw and a second engagement claw are attached to the operation lever, the first engagement claw is engageable with the first checker cam, and the second engagement claw is the second checker cam. Can be engaged with.

According to the structure of the first aspect of the invention, the first and second checker cams for selecting the gear ratio are formed integrally with the base bracket, so that the first and second checker cams are formed separately from the base bracket. There is no need to assemble the base bracket with bolts. Therefore, the process of assembling the transmission operation lever mechanism is simplified, the cost is reduced, and the accuracy of the positions of the first and second checker cams is improved. Furthermore, a first checker cam is formed at a first predetermined position, a second checker cam is formed at a second predetermined position of the base bracket in a direction substantially opposite to the first checker cam, and the first engagement claw and The second engaging claw is attached to the operation lever, the first engaging claw is engageable with the first checker cam, and the second engaging claw is engageable with the second checker cam. By operating the operation lever so as to change the angle with the base bracket, the engagement between the first engagement claw and the first checker cam and the second engagement claw and the second engagement claw
Engagement with the checker cam can be performed at the same time, and further, engagement between the first engagement claw and the first checker cam and release of the engagement between the second engagement claw and the second checker cam can be simultaneously performed.
For this reason, the first and second engagement claws and the first and second checker cams can be engaged with and released from each other by operating the operation lever, so that the gear ratio of the transmission can be selected by operating the operation lever. it can. Further, although a synthetic resin base bracket is usually used, in this case, since the first and second check cams are used as a pair, the strength is almost equal to that of the metal checker cam as in the conventional example. Can be kept.

Further, in the structure of the second invention, in the structure of the first invention, the first checker cam is formed at the edge of the opening of one side plate of the base bracket, and the second checker cam is the base bracket. Is formed at the end of the other side plate. According to the configuration of the second invention, the first checker cam is formed at the edge of the opening of one side plate of the base bracket, and the second checker cam is formed at the end of the other side plate of the base bracket. It becomes easy to form the second checker cam in a direction substantially opposite to that of the first checker cam, and the strength of the first checker cam can be maintained. Since the second checker cam is formed at the end of the side plate, the strength of the second checker cam is equal to or higher than that of the first checker cam.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention, and FIG. 2 shows a disassembled and assembled state of the embodiment. 1 and 2, the base bracket 10 is fixed to a steering column cover (not shown) via mounting holes 11b and 14a by bolts (not shown). 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, an illustrated front side plate 12, and an illustrated rear side plate 1.
3 and the bottom plate 14.

The opening 11a and the mounting hole 11b are formed in the upper plate 11 of the base bracket 10. The opening 12a, the first checker cam 12b, the circular hole 12c, and the square holes 12d and 12e are formed in the front side plate 12 of the base bracket 10 shown in the drawing. The first checker cam 12b is an uneven portion formed on the edge of the opening 12a, and has parking (P), reverse (R), neutral (N), third speed drive (D) of an automatic transmission (not shown).
3) Consists of irregularities corresponding to the second speed drive (D2) and low (L). The holes 12c, 12d and 12e are for fixing the 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 a structure similar to that of 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 the 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 the shaft body 15a and the claws 15b, 15 protruding from both sides of the end of the shaft body 15a.
It consists of c. The shaft body 15a is fitted 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 has a shaft body 16a.
And the claws 1 protruding on both sides of the end of the shaft body 16a
It consists of 6b and 16c. The shaft body 16a has a hole 13c
, The claw 16b is engaged with the hole 13d, and the claw 16c is engaged with the hole 13e. At this time, the shaft body 15a is inserted through the circular hole 32 of the select lever holder 30 described later, and the shaft body 16a is inserted into the select lever holder 30.
Through the circular hole 33a. Therefore, the select lever holder 30 is rotatably supported by the shaft bodies 15a and 16a.

The select lever 20 is an operation lever,
A bearing 24 is formed on the base portion of the select lever 20. Incidentally, 24a is the upper end portion of the bearing 24 in the figure, and
4b is a lower end portion of the bearing 24 in the figure. The knob 26 is attached 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 front side plate 2 of the boss 21 in the figure.
The second engaging claw 23 is attached to the rear side plate of the boss 21 in the figure. The return spring 25 is a coil spring. The return spring 25 is the bearing 2
The lower end portion 24b of No. 4 is inserted into the bearing 24 so as to pass through the coiled main body 25a. It should be noted that one end 25b of the return spring 25 is disposed so as to contact the side surface 21a of the boss 21, and the other end 2 of the return spring 25 is
5c is a bottom plate 3 of the select lever holder 30 described later.
4 is arranged so as to abut the side surface 34a.

The select lever holder 30 includes an upper plate 3
It is a quadrangular frame composed of 1, a side plate 32, a side plate 33, and a bottom plate 34. The circular hole 31a is formed in the upper plate 31, and the circular hole 3a
2a is formed in the side plate 32, a circular hole 33a 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 is the shaft body 35.
a and a flange 35b attached to the shaft 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 arranged 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, so that the male screw of the upper end portion of the select lever shaft 35 is formed. The select lever holder 30 and the select lever shaft 35 can be fixed by the threaded bush nut 36 and the flange 35b.

Therefore, the select lever 20 is rotatably supported by the select lever shaft 35. It should be noted that the return spring 25 moves the first engaging claw 22 to the first
The checker cam 12b is biased, and the second engagement claw 23 is biased to the second checker cam 13b side. When the gear ratio of the transmission is changed by the select lever 20, the first and second engaging claws 22 and 23 are moved against the urging force of the return spring 25 to move the first and second checker cams 12b and 1b.
The select lever 20 is rotated around the select lever shaft 35 so as to be separated from 3b, and the select severs 20 are further rotated around the shaft bodies 15a and 16a of the holder shafts 15 and 16, so that the first and second engaging members are rotated. The dowels 22, 23 are connected to the first and second checker cams 12b, 1b.
After being moved to a predetermined position of 3b, the first and second engaging claws 22 and 23 are moved to the first and second checker cams 12b and 1b.
The select lever 20 is rotated around the select lever shaft 35 so as to engage with 3b.

With the above structure, 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 unnecessary to assemble the base bracket 10 to the base bracket 10 with bolts or the like. Therefore, the assembly process of the transmission operation lever mechanism is simplified and the cost is reduced. Further, 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 engaging claws 22 and 23 are provided.
And the first and second checker cams 12b and 13b are easily engaged with each other.

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 provided in a second predetermined position of the base bracket 10 in a direction substantially opposite to that of the first checker cam 12b. The first engaging claw 22 and the second engaging claw 23 are attached to the select lever 20, and the first engaging claw 22 is engageable with the first checker cam 12b. 23 is second
Since it 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. And the second
The engaging claw 23 and the second checker cam 13b can be engaged at the same time, and further, the first engaging claw 22 and the first checker cam 1
The engagement with 2b and the engagement with the second engagement claw 23 and the second checker cam 13b can be released at the same time. Therefore, by operating the select lever 20, the first and second engaging claws 22 and 23 and the first and second checker cams 12b and 1b.
Since it can be engaged with and released from 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
Although 0 is used, in this case, since the first and second check cams 12b and 13b are used as a pair, the pair of checker cams 12b and 13b are combined,
It is possible to maintain the strength substantially equal to that of the 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 form 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. Although the select lever of the automatic transmission is used in the above-described embodiment, the present invention is not limited to this, and the present invention can be applied to a shift lever of a transmission that is not automatic.

[0017]

As described in detail above, the first aspect of the present invention
According to the invention, it is possible to downsize the transmission operation lever mechanism that changes the transmission gear ratio of the transmission, improve the accuracy, and reduce the cost. Further, according to the second aspect, the first aspect is provided.
In addition to the effect of the invention described above, it becomes easy to form the transmission operation lever mechanism according to the first invention.

[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 essential parts as seen from the back side of FIG.

[Explanation of symbols]

 10 Base Bracket 12 and 13 Side Plate of Base Bracket 12a Opening 12b First Checker Cam 13b Second Checker Cam 20 Select Lever 22 First Engaging Claw 23 Second Engaging Claw

Claims (2)

[Claims] 1. A transmission operation lever mechanism for changing a transmission gear ratio by an operation lever, wherein the transmission ratio selecting first checker cam is formed at a first predetermined position of a base bracket, and Second
A checker cam is formed at a second predetermined position of the base bracket in a direction substantially opposite to the first checker cam, and a first engaging claw and a second engaging claw are attached to the operation lever, and the first engaging claw is provided. A transmission operation lever mechanism, wherein a pawl is engageable with the first checker cam and the second engagement pawl is engageable with the second checker cam. 2. A first checker cam is formed at an edge of an opening of one side plate of the base bracket, and a second checker cam is formed at an end of the other side plate of the base bracket. The operation lever mechanism for a transmission according to claim 1.