JPH0338519Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a transmission control device that selects and shifts a transmission in response to selection and shift operations of a change lever.

<Prior Art> In a conventional transmission control device, for example, as shown in FIGS. 4 and 5, the rear end of the front rod 1 is operated via a lever group 2 to shift a transmission (not shown). The front end of the front rod 1 was connected to the operating end 5a of the change lever 5 via the control lever 4 and the like. Further, the front end of the control lever 4 and the front end of the front rod 1 are held at the tip of a guide lever 6 which is pivotally connected to the chassis 7b. The change lever 5 is held on the cab 7a side so as to be swingable about a cab fulcrum 8 in the select direction and the shift direction.

The selection and shifting of the transmission is performed by moving the change lever 5 from the neutral position in the direction shown in FIG. 4 based on the shift pattern shown in FIG. That is, when the change lever 5 is moved in the select direction, the front rod 1 connected to the change lever 5 via the control lever 4 makes a rotational movement in the direction B-B shown in the figure, thereby moving the shift and select rod 3. Move it back and forth in the select direction to activate the transmission. Furthermore, when the change lever 5 is moved in the shift direction, the guide lever 6 swings in the left-right direction in the figure via the control lever 4, and the front rod 1 is reciprocated in the A-A direction. Rod 3 rotates to shift the transmission.

That is, FIGS. 6 to 9 illustrate the main structure of a conventional transmission control device. In these figures, the control lever 4 is formed in an L-shape, and has a bifurcated metal fitting 4a at one end and a guide metal fitting 4b with a groove 4c formed integrally at the other end. There is. A ball joint 10 fixed to the tip of a guide lever 6 is spherically connected to the base of the control lever 4. In addition, the metal fitting 4a
and a pivot 9 coupled to the operating end 5a of the change lever 5 so as to be rotatable in the front and rear directions.

On the other hand, the tip (front end) of the front rod 1 is bent into an L-shape, and a spherical portion 1a that is rotatably fitted into the groove 4c is formed at the bent tip of the front rod 1.
A ball joint 11 fixed at the tip of the front rod 1 is spherically connected to the base of the front rod 1. In addition, in this way, the front rod 1 and the control lever 4 are each connected to the ball joint 1.
Guide lever 6 spherically connected via 0 and 11
The base end of the bracket 31 is pivotally attached to a bracket 31 on the side of the chassis 7b via a pin 12 extending in the left-right direction.

Further, the cab fulcrum 8 of the change lever 5
A spherical body 13 is provided as shown in FIG.
4 is fitted into a holder 15 provided on the cab 7a. Further, a pin 16 that engages with the groove 13a of the spherical body 13 is provided on the cab fulcrum 8, and a boot 17 is provided between the change lever 5 and the holder 15.
is provided to prevent dust from entering the cab fulcrum 8.

In the transmission control device having such a configuration, the change lever 5 is operated to swing in the shift direction (back and forth direction) around the cab fulcrum 8, and similarly swings in the select direction (horizontal direction) around the cab fulcrum 8. be operated dynamically.
When the change lever 5 is selected, the control lever 4 rotates about the straight line connecting the cab fulcrum 8 and the ball joint 10, and as shown in FIG. Exercise. Then, this guide fitting 4b
Since the spherical portion 1a fitted in the groove 4c moves in the same direction (vertical direction), the front rod 1 rotates as shown by the arrow B-B in FIGS. Activate the transmission in select mode.

Further, when the change lever 5 is shifted, the control lever 4 reciprocates in the left-right direction in the figure, and the guide lever 6 is accordingly swung in the same direction. When the guide lever 6 moves in this way, the front rod 1 moves toward the arrow A in the figure.
-A transmission (not shown) is shifted in order to be moved in the left and right direction as indicated by A.

By the way, in the conventional transmission control device having such a configuration, when the change lever 5 is operated, the control lever 4 moves between the cab fulcrum 8 (point ○A) and the ball joint 10 (point ○B). Furthermore, the operating force acting on the control lever 4 is the distance L from the knob 5b of the change lever 5 to the above straight line, and the distance L from the straight line to the operating end 5a (pivot) of the change lever 5. 9) depends on the distance.

Therefore, for example, as automobiles become smaller, the distance between the change lever 5 and the front end of the cab decreases, and it becomes necessary to move the guide lever 6 closer to the cab fulcrum 8, so the guide lever 6 is moved as shown in FIG. When the change lever 5 is moved back to the position shown by the chain line, the distance L from the knob 5b of the change lever 5 becomes smaller than the original state as shown in the same figure, so the operating force for the change lever 5 increases. I had a problem with it getting stuck.

<Problem to be solved by the invention> The present invention was made in view of the above-mentioned circumstances, and as automobiles become smaller, the position of the guide lever that supports the control lever has been changed to the fulcrum of the change lever (cabinet). It is an object of the present invention to provide a transmission control device that can maintain the operating force of a change lever at a desired value even when the transmission control device is moved close to a fulcrum (fulcrum).

<Means for Solving the Problems> In order to achieve the above object, the present invention rotates and reciprocates the control lever along the front and rear direction as the change lever is selected and shifted. In a transmission control device that selects and shifts the transmission as it rotates and reciprocates, one end of the control lever is attached to the tip of a guide rod that is pivotally attached to the cab so that it can swing only in the front and rear directions. The other end of the control lever is spherically connected and held at the tip of a guide rod that is pivotably mounted on the chassis side so as to be able to swing only in the front-rear direction. A metal fitting pivotally connected to the control lever so as to be swingable only in the front-rear direction and a metal fitting fixed to the operating end of the change lever are pivotally connected so as to be swingable only in the left-right direction. .

<Function> In the transmission control device configured as described above, one end of the control lever is spherically connected to the tip of a guide rod that is pivotally mounted on the cab side so as to be able to swing only in the front and back direction, and the control lever The control lever can be rotated around a straight line connecting the guide rod tip and the guide lever tip by holding the other end spherically connected to the tip of the guide lever, which is pivotally attached to the chassis side so that it can swing only in the front-rear direction. I'm trying to make it move. Therefore, even if the guide lever or the guide rod is moved closer to the fulcrum of the change lever (cab fulcrum), the lever ratio of the change lever does not change, and the operating force does not change. In addition, since the metal fitting fixed to the actuating end of the change lever and the metal fitting pivotally connected to the control lever so that it can swing only in the front and back directions are pivotally connected so that they can swing only in the left and right direction. By changing the position of the joint mechanism using the metal fittings, the ratio of the change lever can be changed to optimally adjust the operating force.

<Example> An example of the present invention will be described below based on FIGS. 1 to 3.

As shown in FIG. 3, the change lever 5 is inserted into and held in a spherical body 13 so as to be able to move (slide) in the axial direction, and a bush 14 that fits and holds the spherical body 13 in a rotatable manner is fixed to the cab 7a. Holder 15
It is fitted inside.

At the operating end 5a of the change lever 5, there is a metal fitting 18 formed in a bifurcated shape as shown in FIG.
is fixed, and another metal fitting 19 is pivotally connected to this metal fitting 18 so as to be rotatable only in the left and right direction. 2
0 is a pin that pivotally connects both metal fittings 18 and 19.

Further, a control lever 2 extending in the front-rear direction is disposed on a downward extension line of the change lever 5.
A boss portion 21a is provided at the rear end portion of the boss 2.
The metal fitting 19 is pivotally connected to 1a so as to be rotatable only in the front-back direction. 22 is control lever 2
This control lever 21 is formed into a substantially L-shape, with a lever 23 facing toward the front rod 1 integrally formed with the proximal portion 24 at the front end as a joint portion. ing.

On the other hand, the bracket 25 fixed to the cab 7a
The upper end of the guide rod 26 is pivotally mounted to be able to swing only in the front-rear direction, and a ball joint 27 fixed to an extension 28 protruding rearward from the boss 21a is spherically connected to the lower end of the guide rod 26. As a result, the rear end of the control lever 21 is held by the guide rod 26.

In addition, the bracket 31 fixed to the chassis 7b side
The lower end of the guide lever 6 is pivotally mounted with a pin 12 so that it can swing only in the front and back direction, and the ball joint 10 fixed to the upper end of the guide lever 6 is attached to the base part (front end part) of the control lever 21. By spherically connecting the guide lever 6, the front end of the control lever 21 is held.

Furthermore, as shown in FIG. 2, the front end of the front rod 1 is spherically connected and held to the upper end of the control lever 6 via a ball joint 11, and the tip of the lever 29 extending from the front end of the front rod 1 toward the control lever 21 has a spherical surface. 2
9a is provided. A guide fitting 23a is fixed to the tip of the lever 23 extending from the front end of the control lever 21 to the front end of the front rod 1, and a groove 23b into which the spherical portion 29a is rotatably fitted is provided in the guide fitting 23a. , guide fitting 23
a and the spherical portion 29a are covered with a boot 32 for dustproof treatment.

In the transmission control device configured as described above, when a select operation is performed to move the change lever 5 in a direction perpendicular to the plane of the paper in FIG. 19, the boss portion 21a is also about to be moved in a direction perpendicular to the plane of the paper.
However, since the control lever 21 is held by the guide rod 26 and the guide lever 6 and its movement in the direction perpendicular to the paper (left and right) is restricted, the control lever 21 is held by the balls provided at its front and rear ends. joint 10,
It can be rotated around a straight line connecting 27.

Therefore, the selection operation of the change lever 5 is converted into a simple rotational movement of the control lever 21. Incidentally, the displacement of the change lever 5 in the axial direction due to such a selection operation is absorbed by the sliding movement of the change lever 5 itself and the link operation by the pair of metal fittings 18, 19 and the pin 20.

On the other hand, when the change lever 5 is shifted, this movement is transmitted to the boss portion 21a of the control lever 21 via the pair of metal fittings 18, 19 and the pin 20. The control lever 21 also includes a guide rod 26 and a guide lever 21.
Since the guide lever 5 is held so as to be movable back and forth, when the change lever 5 is shifted, it moves back and forth in synchronization with the shift operation, causing the guide lever 6 to swing back and forth. Note that when the control lever 21 rotates and moves back and forth, the front rod 1
rotates and slides, and a transmission (not shown) performs select and shift operations.

By the way, the selection and shift operations of the change lever 5 as described above are rocking motions centered on the center point of the spherical body 13 which is the cab fulcrum 8.
The control lever 21 is rotated around a straight line connecting the tips of the guide rod 26 and the guide lever 6, or is moved (slides) back and forth under the guidance of the guide rod 26 and the guide lever 6. Therefore, even if the guide lever 6 is moved closer to the cab fulcrum 8 due to the downsizing of automobiles, for example, the distance between the rotation center line of the control lever 21 and the operating point (knob 5a) of the change lever 5 will be There is no change at all, and the operating force does not increase. That is, the lever ratio of the change lever 5 is determined by the distance L' from the knob 5a of the change lever 5 to the cab fulcrum 8, the distance from the cab fulcrum 8 to the pin 20 that pivotally connects the pair of metal fittings 18 and 19, and It is determined by the distance from the pin 20 to the rotation center line of the control lever 21, and does not change depending on the position of the guide lever 6.

<Effects of the invention> As is clear from the above explanation, according to the invention, one end of the control lever is spherically connected to the tip of the guide rod which is pivotally mounted on the cab side so as to be able to swing only in the front and back direction, and this By holding the other end of the control lever in a spherical connection with the tip of the guide lever, which is pivotally attached to the chassis side so that it can swing only in the front-back direction, control is centered on the straight line connecting the tip of the guide rod and the tip of the guide lever. I'm trying to turn the lever. Therefore, even if the guide lever or guide rod is moved closer to the fulcrum of the change lever (cab fulcrum) as automobiles become smaller, the lever ratio of the change lever will not change and the operating force will not change. In addition, since the metal fitting fixed to the actuating end of the change lever and the metal fitting pivotally connected to the control lever so that it can swing only in the front and back directions are pivotally connected so that they can swing only in the left and right direction, both By changing the position of the joint mechanism using the metal fittings, the lever ratio of the change lever can be changed to optimally adjust the operating force.

[Brief explanation of the drawing]

Fig. 1 is a front view of the main parts of an embodiment of the present invention seen from the side, Fig. 2 is a plan view taken in the direction of the arrow in Fig. 1, and Fig. 3 also shows the specific structure around the cab fulcrum of the change lever. FIG. 4 is a front view as seen from the side showing the overall configuration of the prior art, and FIG.
6 is a plan view showing the main parts of the prior art, FIG. 7 is a front view as seen from the arrow in FIG. 6, and FIG. 8 shows the structure around the cab fulcrum of the prior art. The cross-sectional view shown in FIG. 9 is an explanatory diagram illustrating changes in the operating force of the change lever. 5...Change lever, 6...Guide lever,
7a... Cab, 7b... Shaft, 8... Cab fulcrum, 10, 27... Ball joint, 12,
20, 22...pin, 13...spherical body, 14...
Button, 15...Holder, 18, 19...Metal fitting, 21a...Boss part, 28...Extension part, 25,
31...Bracket, 26...Guide rod.

Claims (1)

[Scope of utility model registration request] By rotating and reciprocating the control lever 21 along the front-rear direction as the change lever 5 is selected and shifted, the transmission is selected and shifted in accordance with the rotation and reciprocation of the control lever 21. In such a transmission control device, a guide rod 26 is pivotally attached to the cab 7a side so as to be swingable only in the front and back direction.
One end of the control lever 21 is spherically coupled to the tip of the control lever 21, and the other end of the control lever 21 is spherically coupled to the tip of the guide lever 6 which is pivotally mounted on the side of the chassis 7b so as to be able to swing only in the longitudinal direction. A metal fitting 19 pivotally attached to the control lever 21 so as to be swingable only in the front-back direction and a metal fitting 18 fixed to the actuating end 5a of the change lever 5 are pivotally connected so as to be swingable only in the left-right direction. transmission control device.