JPH076574B2 - Change lever unit - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain lever unit used for gear shift operation.

2. Description of the Related Art In a gear shifting operation of an automobile or the like, a change lever is provided so as to be guided in a guide groove so as to be movable in a select direction and a shift direction according to a shift pattern. A chain lever unit is used which is installed to obtain a required signal.

In such a chain lever unit, it is necessary to urge the chain lever so as to return the chain lever to the neutral position.
As disclosed in Japanese Patent No. 4417, there is one in which a cam which rotates integrally with a change lever is provided and a roller connected to an air cylinder is brought into pressure contact with the cam surface of this cam. Thus, in order to return the chain lever to the neutral position, the driving force from the air cylinder presses the roller against the cam surface, and the pressing force of the roller causes the cam to return to move the chain lever to the neutral position. It is intended to be restored.

Problems to be Solved by the Invention Using an air cylinder to return the chain lever to the neutral position allows the return timing to be set by driving the air cylinder, so from the viewpoint of setting the operation timing, Although effective, it is desirable to automatically restore in the select direction, for example. Therefore, even in such a case, the return of the air cylinder to the neutral position complicates the operation control. Further, mechanically, the structure of the return mechanism using the air cylinder is complicated.

Means for Solving the Problems In a change lever unit in which a position switch interlocking with the operation of a change lever that rotates in the select direction and the shift direction is provided in the main body, the change lever is rotatably provided in the main body. A support shaft, a pin that is mounted orthogonally to the support shaft and holds the change lever, and a V
The cam is configured to elastically contact with a V-shaped recess and to clamp the chain lever, and a spring attached to the pin to urge the cam to contact the support shaft.

Action By rotating the chain lever, the cam holding the chain lever also moves and the state of contact with the spindle changes, but when the chain lever is released and released, the push from the spring is released. Since the cam moves by pressure so that the support shaft fits in the V-shaped recess, the chain lever can be moved together with the cam to return to the neutral position, and the structure for that is only the cam and the spring. , Can be formed extremely easily.

Embodiment An embodiment of the present invention will be described with reference to the drawings. First,
1 and 2 show the structure of the position switch 1.
The switch case 2 is rotatably supported by a rotating body 3 which is interlocked with a change lever described later. An arm 5 having a notch 4 at the tip and an arm 7 having a piece 6 to be detected at the tip are integrally formed on the rotating body 3 so as to project in the radial direction, and a fitting hole 8 is formed at the center. Has been done. A lid plate having an opening 9 facing the fitting hole 8
10 is fixed to the opening surface of the switch case 2 by a screw 11, and the switch case 2 is formed with a chamber 12 which is shielded from the outside by a cover plate 10. A long hole 13 for allowing the arm 7 to project into the chamber 12 is formed on a part of the side surface of the chamber 12, and the long hole 13 is closed by the outer peripheral surface of the rotating body 3.

Then, in the chamber 12, 3 along the rotation locus of the detected piece 6
A circuit board 15 holding a single sensor 14 and other circuit elements (not shown) is fixedly housed. These sensors
Reference numeral 14 is a so-called normal photointerrupter in which a light emitting element and a light receiving element whose optical axis is blocked by the detected piece 6 are opposed to each other. A cable 16 connected to the sensor 14 and other circuit elements is airtightly held in an outlet 17 formed in the switch case 2 and led out to be connected to an external circuit.

Then, the chain lever unit is shown in Figs.
18 configurations are shown. Reference numeral 19 denotes a box-shaped main body, and a hemispherical bottom surface of the main body 19 is formed with a king-shaped guide groove 21 for moving the chain lever 20 corresponding to the shift pattern shown in FIG. Has multiple circular holes 22
Are formed. Although the attachment structure of the chain lever 20 will be described later, in FIG. 3, the horizontal movement of the chain lever 20 is in the “select” direction, and the vertical movement is in the “shift” direction.

Next, a mounting structure of the chain lever 20 will be described. First, the chain lever 20 is slidably fitted to an upper rod 23 and a lower rocking body 24, and the lower end of the rocking body 24 is urged downward by a spring 25 so as to be reciprocated in a circular hole 22. A steel ball (26) that engages spontaneously is held so as to be retractable. And
The main body 19 is rotatably provided with a support shaft 27 serving as a rotation center of the change lever 20 in the shift direction, and a pin 29 is attached to the center of the support shaft 27 in a direction orthogonal to the support shaft 27. There is. The swing body 24 of the chain lever 20 is provided with the pin 29.
Is rotatably mounted in the select direction about the center of the support shaft 27, and is connected to the support shaft 27 by fitting a vertically long opening 24a having the same inner width as the outer diameter of the support shaft 27. Has been done. Therefore, the oscillating body 24 does not move in the axial direction of the pin 29 because the opening 24a has the same inner width as the outer diameter of the support shaft 27, but since the opening 24a is long in the vertical direction, the pin 29 is centered on the pin 29. Even if it is rotated as, there is no interference with the support shaft 27.

A U-shaped interlocking plate 28 is connected to the support shaft 27. In the lower part of the interlocking plate 28, the swinging motion of the swinging body 24 about the support shaft 27 as a fulcrum is linked to the swinging motion of the swinging body 24 about a pin 29 which is erected orthogonally to the support shaft 27. The long hole 30 is formed so as not to follow the. Also, the main body 19 has a spindle
A pair of separation support shafts 31 located on the same axis orthogonal to the axis of 27 are supported, and these separation support shafts 31 are supported on both sides of a U-shaped interlocking plate 32. An elongated hole 33 is formed in the lower part of the interlocking plate 32 so as to interlock with the rotational movement of the oscillator 24 with the pin 29 as a fulcrum and not follow the rotational action of the oscillator with the support shaft 27 as a fulcrum. Has been done. That is, U
Two interlocking plates 28 and 32, which are formed in a V shape, are provided orthogonal to each other.

Further, a cam 34 that expands in an inverted V shape is fixed to one end of the support shaft 27, and an elastic body 35 that comes into contact with a valley portion of the lower center of the cam 34 is fixedly provided. That is, when the support shaft 27 rotates in the shift direction together with the interlocking plate 28 and the rocking body 24, the portions of the cam 34 that expand on both sides of the cam 34 face the resistance of the elastic body 35 to direct the rocking body 24 to the neutral position. It is to urge.

Further, a cam 37, which is biased by the spring 36 held by the pin 29 and elastically contacts the support shaft 27 with a V-shaped recess, is swingably attached to the pin 29. The cam 37 holds both sides of the rocking body 24, and when the rocking body 24 rotates about the pin 29 as a fulcrum, the portion that expands from the V-shaped trough is the spindle.
The oscillating body 24 is biased to the neutral position by receiving the resistance of 27. For example, when the chain lever 20 is rotated counterclockwise in FIG. 5, the cam 37 also rotates counterclockwise. At this time, the V-shaped valley portion of the cam 37 is fitted into the support shaft 27, but the cam 37 moves in the axial direction of the pin 27 while the slope surface of the upper left portion of the V-shaped concave portion of the cam 37. And the slope on the lower right side are in contact with the support shaft 27. In this state, if the operating force for the change lever 20 is lost, the cam
Since 37 receives the force of the spring 36, the cam 37 moves in the direction of the support shaft 27 by the force of the spring 36 to return and rotate the change lever 20 in the clockwise direction.

Further, the rod 23 of the chain lever 20 has a small diameter portion 38, a large diameter portion 39 located below it, and a collar 40.
A stopper 42 is provided which is urged upward with respect to 24 and which abuts the upper surface of the collar 40 to determine a return position above the rod 23. That is, the guide groove 21 has a width that matches the diameter of the small diameter portion 38 only at the reverse position, and a width that matches the diameter of the large diameter portion 39 at the other portions. Therefore, when the chain lever 20 is shifted to the reverse position, the rod 23 is pushed to retract the large diameter portion 39 to the lower side of the guide groove 21.

Thus, the two position switches 1 are fixed to the inner surface of the main body 19. The fitting body 8 of the rotating body 3 of the one position switch 1 is fitted to the end of the support shaft 27, and the notch 4 of the arm 5 is engaged with the pin 43 standing on one side of the interlocking plate 28. . The fitting hole 8 of the rotating body 3 of the other position switch 1 is fitted to the separation support shaft 29 on one side, and the notch 4 of the arm 5 is engaged to the pin 43 standing on one side of the interlocking plate 32. ing.

In such a structure, the operation of the change lever 20 in the select direction is the horizontal direction in FIG. 3, and the operation in the shift direction is the vertical direction. In FIG. 6, when the change lever 20 is rotated in the select direction (left and right direction in FIG. 5) around the pin 29 as a fulcrum, this action causes the interlocking plate 32 to move.
Rotates together with the pin 43 about the separation shaft 31 as a fulcrum. This causes the rotating body 3 of the position switch 1 to rotate. Then, the chain lever 20 is urged to return to the neutral position by the action of the cam 37. Next, in FIG. 5, when the change lever 20 is rotated in the shift direction (left and right direction in FIG. 6) about the support shaft 27 as a fulcrum, the interlocking plate 28 and the support shaft 27 interlock with this operation, The pin 43 rotates the rotating body 3 of the position switch 1. At this time, the chain lever 20 is urged to return to the neutral position because the cam 34 receives the force from the elastic body 35.

Returning to FIG. 1, the operation of the position switch 1 will be described. When the rotating body 3 rotates, one of the sensors 14 detects the detection piece 6 and outputs an electric signal. Therefore, the select position and the shift position of the change lever 20 are set by the outputs of the two position switches 1.

Since the sensor 14 and the detected piece 6 are housed in the chamber 12 that is shielded from the outside, and the sensor 14 does not contact the detected piece 6, the contact resistance changes unlike the case where the fixed contact and the movable contact are in contact with each other. Therefore, no wear dust is generated,
Insulation failure can be prevented and reliability and durability can be improved. Further, the position switch 1 can be adapted even if the number of selections and the number of shifts are increased or decreased according to the model of the transmission. That is, it is possible to deal with the situation immediately by exchanging the circuit board 15 in which the arrangement position and the number of the sensors 14 are changed, and it is possible to share the parts other than the circuit board 15.

As described above, according to the present invention, in the change lever unit in which the position switch interlocking with the operation of the change lever that rotates in the select direction and the shift direction is arranged in the main body, the main body is rotatable in the main body. A support shaft provided, a pin that is mounted orthogonal to the support shaft and holds the change lever, and a cam that elastically contacts the support shaft with a V-shaped recess and clamps the change lever. ,
Since the cam is attached to the pin and biases the cam so as to come into contact with the support shaft, the cam holding the change lever is also moved and supported by rotating the change lever. The contact state with the shaft changes, but when you release the chain lever and release it,
Since the cam moves so that the support shaft fits in the V-shaped recess due to the pressing force from the spring, the chain lever can be moved together with the cam to return to the neutral position, and the structure for this is the cam and the spring. Since it is sufficient, it has an effect that it can be formed extremely easily.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a plan view showing the inside of a switch case, FIG. 2 is a vertical sectional side view,
FIG. 3 is a plan view of the chain lever unit, FIG. 4 is an explanatory view showing a shift pattern, and FIG. 5 is A- in FIG.
FIG. 6 is a vertical sectional side view of the line BB in FIG. 2 ... Switch case, 3 ... Rotating body, 6 ... Detected piece, 12 ... Room, 14 ... Sensor, 20 ... Changing lever

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takako Abiko 2-5-5 Kita-Otsuka, Toshima-ku, Tokyo Inside Ushin Development Headquarters (72) Inventor Mitsu Ichinose 2-5-2 Kita-Otsuka, Toshima-ku, Tokyo No. Within Yushin Development Division, Inc. (56) References JP-A-57-104417 (JP, A)

Claims (1)

[Claims] 1. A change lever unit in which a position switch interlocked with the operation of a change lever that rotates in a select direction and a shift direction is provided in a main body, and a support shaft rotatably provided in the main body. , A pin which is mounted orthogonally to the spindle and which holds the chain lever,
A cam for elastically contacting the support shaft with a V-shaped recess and for clamping the chain lever, and a spring attached to the pin for urging the cam to contact the support shaft. A chain lever unit that is characterized by having.