JPS628188Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a select return device for a remote control type gear shift operation mechanism mainly used in horizontally mounted front-wheel drive vehicles.

This type of remote control speed change operation mechanism is configured as shown in FIG. 1, for example.
The shift and select operation of the shift lever 11 is transmitted as the respective operating force to the shift and select lever shaft 2 of the transmission 1 through push-pull cables 21 and 22 of the shift system and select system. . As a conventional select return device, the shift and select lever shaft 2, control lever 3, bell crank 4, and Shift lever 1 through the select cable 22 above.
It gives power back to 1. In this case, the spring force of the select return spring is applied to the shift lever 1.
This loss of spring force occurs in the select path up to 1, and if the spring force of the select return spring is increased in consideration of this loss, there is a problem in that the operating load on the shift lever 11 becomes excessive.

In addition, the above select return spring is
In order to obtain return forces in both select directions of the shift lever 11, separate springs are applied to each direction. Therefore, at the select return position, the spring forces of both springs cancel each other out and become weaker, so that the shift lever 11 may not be accurately returned to the select return position.
In particular, there was a problem in that there was a lack of sense of moderation at the select return position.

In view of these conventional circumstances, the present invention avoids the loss of select return force in a remote control type shift operation mechanism, allows the select return position of the shift lever to be determined accurately and with a sense of moderation, and is simple. The object of the present invention is to provide a select return device having a compact structure using one spring.

Next, the configuration of the present invention will be described in detail according to embodiments shown in the drawings.

First, in FIG. 1, which is a perspective view schematically showing a remote control type speed change operation mechanism, reference numeral 23 indicates a clutch housing connected to a transverse engine (not shown), and 1 indicates a transmission. As briefly explained above in connection with the prior art, the shift lever 11 is moved from the arrow A--
When the select operation is performed in the A direction, the bell crank 4 on the transmission 1 side is rotated about the pivot pin 5 through the push/pull operation of the select cable 22 using the push-pull cable. As a result, the control lever 3 of the shift and select lever shaft 2, with which one end of the bell crank 4 is engaged, is reciprocated in the axial direction together with the shaft 2, and a selection operation is performed within the transmission 1. Furthermore, when the shift lever 11 is shifted in the direction of arrow B-B in FIG. At the same time, it is rotated about its axis, and a predetermined shift can be obtained within the transmission 1. There is also a remote control type speed change operation mechanism in which each of the cables 21 and 22 described above is replaced with a link mechanism.

Next, the support structure of the shift lever 11 will be explained with reference to FIGS. 2 and 3. The upright piece 6 of the shift lever retainer 6 fixed to the vehicle body
A shift lever support 7 is mounted so as to be rotatable around the axis of a support bolt 8 fixed to these upright pieces 6a. This support 7 is integrally formed with a support arm 9 extending upward and a support lever 10 extending downward. shift lever 11
A shifting lever 12 is integrally formed at the lower part of the lever, and the part that continues to the shifting lever 12 is connected to the support arm 9.
The arm 9 is supported so as to be rotatable around the axis of a support bolt 24 fixed to the arm 9. That is, by the aforementioned selection operation of the shift lever 11 (operation in the direction of arrow A-A in FIG. 1), the shift lever support 7 and the support lever 10 are rotated about the support bolt 8 of the upright piece 6a as the rotation axis. By shifting the shift lever 11 (operation in the direction of arrow B-B in FIG. 1), the shift lever 11 and its shifting lever 12 are moved against the arm 9 of the support 7.
It is rotated around the support bolt 24 as the rotation axis.

A portion of the shift lever retainer 6 includes a fourth
A select bell crank 13 having a shape as shown in the figure is provided, and a boss portion 14 of this bell crank 13 is attached so as to be rotatable around the axis of a support bolt 17 erected on the retainer 6. The bell crank 13 has an operating side lever section 15 and a driven side lever section 16 with the boss section 14 as a boundary.
has a spherical part 15a formed at its tip,
This spherical portion 15a engages with a U-shaped groove formed at the lower end of the support lever 10. (See especially Figure 3). Further, a pin 16a is provided protruding from the tip of the driven side lever portion 16.
6a is connected to the rod 22a of the aforementioned select cable 22 (see FIG. 2). That is, in conjunction with the above-mentioned rotational movement of the support lever 10 accompanying the selection operation of the shift lever 11, the above-mentioned select bell crank 13 rotates around the axis of its boss portion 14, and the rod 22a of the select cable 22 rotates. is pushed and pulled. The rod 21a of the shift cable 21 is connected to the pin 12a at the tip of the shifting lever 12, and the rotation of the shifting lever 12 accompanying the shift operation described above causes the shift cable 21 to rotate. The rod 21a is pushed and pulled.

To explain the select return device of the select operation mechanism, first, as is clear from FIGS. 4 and 5, on the upper surface of the shift lever retainer 6, when the select bell crank 13 is in the select return position, A stopper 19 is fixed at a location corresponding to a portion of the driven side lever portion 16. This stopper 19
As is clear from FIG. 2 and FIG.
It is designed not to interfere in any way. In addition, both sides 19a and 19b of the stopper 19,
As is clear from FIGS. 4 and 5, the corresponding portions of both sides of the driven lever portion 16 are located on the same plane in the vertical direction.

On the other hand, a select return spring 20 using a torsion coil spring is provided on the outer periphery of the boss portion 14 of the select bell crank 13. Both upper and lower ends 2 of this spring 20
0a and 20b are bent downward, respectively, and are formed on both sides of the driven side lever portion 16 and on both sides 19a and 19 of the stopper 19.
b with a predetermined spring force.
That is, both ends 20a of this spring 20,
20b is clamped to the driven side lever portion 16 and the stopper 19 from both sides with a preload.

Next, the operation of the select return device configured as described above will be explained. Assume that in conjunction with the select operation of the shift lever 11, the select bell crank 13 is rotated counterclockwise in FIG. 4 about its support bolt 17 as the rotation axis. At this time, the driven lever portion 16 of the bell crank 13 moves in the right direction in FIG. 5, that is, in the direction toward position C shown by the imaginary line in FIG. One end portion 20a of the lever portion 16 moves together with the lever portion 16. However, since the other end 20b of the spring 20 remains locked to the corresponding side surface 19b of the stopper 19, the spring force of the spring 20 gradually increases as the lever portion 16 moves. do. Therefore, when the operating force on the shift lever 11 is released, the select bell crank 13 quickly returns to the illustrated select return position due to the increased spring force of the spring 20. The return action of the bell crank 13 acts efficiently on the shift lever 11 through the support lever 10 and support arm 9 of the shift lever support 7, and the shift lever 1
1 to the select return position appropriately.
Further, when the select bell crank 13 is rotated clockwise in FIG. 4 about the support bolt 17, the driven lever portion 16 of the bell crank 13 is moved toward the left in FIG. It moves in the direction toward position D indicated by the imaginary line in the figure. As a result, the end 20b of the return spring 20 moves together with the driven lever portion 16, and the other end 20a remains locked to the side surface 19a of the stopper 19. As a result, the same select return effect as in the above case is obtained.

Note that even when the select bell crank 13 has returned to the select return position, the select return spring 20 does not respond to the bell crank 13.
Since the return force is exerted in each select direction and the position is determined by both side surfaces 19a and 19b of the stopper 19, the return position can be accurately determined even with a single spring. Also, the return force is acting on the bell crank 13 even in the select return position.
At this position, the sense of moderation when operating the shift lever is good. FIG. 6 shows this characteristic in comparison with a conventional select return device. The horizontal axis in FIG. 6 represents the select operation stroke S, and the vertical axis represents the select return force F.
N on the horizontal axis indicates the select return position, and in the case of the select return device of this embodiment shown by the solid line, the return force is maintained at the above N position, whereas the conventional device shown by the two-dot chain line In the case of , the return force at the N position is zero.

As is clear from the above description, the present invention can obtain an effective and sufficient select return force even with a compact design using a single select return spring. Furthermore, the present invention provides a select return force to the select bell crank, which is in a direct interlocking relationship with the shift lever, and also makes the return force in each select return direction exerted even in the return position. The select return position of the shift lever can be determined accurately, and the shift lever operation at that position has the effect of providing a good sense of moderation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a perspective view schematically showing a remote control type shift operation mechanism using a push-pull cable, and Fig. 2 shows a shift lever and the subsequent shift operation mechanism. 3 is a partially broken side view of FIG. 2, viewed from the right side, FIG. 4 is a sectional view taken along the - line in FIG. FIG. 4 is an enlarged view viewed from the - line direction, and FIG. 6 is a characteristic diagram showing the select return function in comparison with a conventional one. 1...Transmission, 6...Shift lever retainer,
11...Shift lever, 13...Select bell crank, 19...Stopper, 20...Select return spring.

Claims (1)

[Scope of utility model registration request] It has a shift lever that is attached to a shift lever retainer so that it can perform shift and select operations, and a select bell crank whose boss is rotatably attached to the retainer with a support pin. In a remote control type gear shift operation mechanism in which a select operation is directly transmitted as a rotational motion of a bell crank, and the bell crank's motion is transmitted to a transmission through a pushable cable or link, the select return position of the select bell crank A stopper is fixed on the shift lever retainer at a location corresponding to the select bell crank without interfering with the rotational movement of the select bell crank, and a select return using a single torsion coil spring is mounted on the outer periphery of the boss portion of the select bell crank. A select return device characterized in that a spring is provided, and both ends of the spring are bent to apply a preload to both sides of the select bell crank in the rotation direction of the select bell crank and both sides of the stopper to lock them together.