JPH0220530Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmission operating mechanism in which the select check and select return mechanisms are provided on the cover of the transmission.

To operate the transmission, as is well known to those skilled in the art, a desired shifter is selected by moving a shift lever provided on the inner shaft in the axial direction of the shaft, and then the shift lever is moved. It is designed to shift by rotational operation. By the way, in such an operation mechanism, a select check mechanism is provided to sense the select operation, and in order for the select check mechanism to function sufficiently, a select return mechanism is provided that operates to return the shift lever to the neutral position. is provided.

As described above, the operating mechanism of the transmission is provided with a select check mechanism and a select return mechanism, but conventional mechanisms of this type have various drawbacks. For example, in the mechanism shown in FIG.
It consists of a check spring 23 inserted into a hole formed in 2 and a check ball 24, which ball cooperates with a groove 26 in an inner shaft 25. Further, the select return mechanism 30 consists of a return spring 33 interposed between the boss 22 and the side wall 32 of the transmission cover 31, but this mechanism has a large sliding resistance during selection and has a poor selection feeling. There is a drawback. Although not shown, the return spring 33 is
They are arranged in pairs. Further, in the conventional mechanism shown in FIG. 2, the selection feeling is improved, but the processing of the parts is complicated, which increases the cost. That is, the select return mechanism includes a check pin 41 inserted into the shifter 40 and a bottom wall 43 of the recess 42 of the shifter 40.
a return spring 44 interposed between
The check mechanism consists of a check spring 45 provided on the shifter and a ball 47 that cooperates with a groove 46 formed in the shaft of the check pin 41. In this way, the shifter has a select check mechanism. Since it incorporates a select return mechanism and a select return mechanism, it has a disadvantage that the structure is complex and difficult to process.

For example, Japanese Utility Model Publication No. 45-20096 discloses a type in which a check ball that engages with a groove is pressed by a spring. However, since this technology is a rear limit position sensing device, it has nothing to do with the feeling of shift operation and can be installed at any position, but in order to improve the feel of the shift operation mechanism, it is necessary to install it in a location close to the inner shaft. A spring-loaded check ball must be provided.

In particular, when designing a vehicle, the transmission cannot protrude above the top surface of the frame. However, in the prior art, the housing portion that accommodates the resistance piece protrudes above the transmission, which is inconvenient.
Furthermore, in the known technique, when pushing the resistance variable to rotate the gear shift operator, the contact caused by the linear movement of the resistance piece and the rotational movement of the selection arm causes strain, resulting in poor operation feeling, and It is not possible to provide a sense of moderation when selecting each position.

Therefore, an object of the present invention is to provide a transmission operating mechanism that has no protruding parts on the upper part of the transmission and has a good operating feeling.

According to the present invention, the engaging portion of the shift lever selectively engages with the shifter by moving the shift lever in the axial direction, and the shifter is operated by rotating the shift lever. , a pair of opposing holes formed in the transmission cover parallel to the axis of the innershaft and at approximately the same height as the innershaft, a return spring and a check pin inserted into each hole, and a return spring and a check pin inserted into the respective holes. It is provided with a circumferential groove formed therein and a check ball press-fitted into the circumferential groove by a check spring, between a pair of opposing check pins.
A projection provided on the shift lever is arranged.

Therefore, the select check mechanism and the return mechanism can be provided on the transmission cover, and there is no need to process grooves on the inner shaft, making the process easy. Assembly is easy by simply processing the transmission cover and inserting check pins, balls, springs, etc. And since there is no check ball on the shaft, the sliding resistance is reduced and the selection feeling is improved.

In particular, in this invention, a pair of opposing holes are provided in the transmission cover, which are parallel to the axis of the innershaft and at approximately the same height as the innershaft. There are no protruding parts above the machine, making it easy to design the layout.

In addition, since only linear motion is required when rotating the gear shift knob, the above-mentioned twisting does not occur, and the operation feeling is good, and the return spring and check pin provide a sense of moderation at each selected position. is easy.

An embodiment of the present invention will be explained below with reference to FIG. 3a, which shows one embodiment, and FIG. 3b, which is a sectional view taken along line A-A. Now, referring to FIGS. 3a and 3b, the selection check mechanism C of the transmission operating mechanism according to the present invention is shown.
It is easily understood that the select return mechanism R is provided on the transmission cover K, and the projection T that cooperates with both mechanisms is formed on the shift lever 1. That is, the inner shaft 2 inserted through the transmission cover K is provided with a shift lever 1, and when the shift lever moves in the axial direction, its engaging portion 3 engages four shifters a, b, and c. , d, and then shifted by a rotational operation. Further, a projection T is formed from the boss of the shift lever 1 in a direction different from that of the engaging portion 3. This protrusion T cooperates with check pins 7, 7.

The select check pins 7, 7 have a cylindrical outer shape, and a select check mechanism C is provided on the outer periphery of the select check pins 7, 7.
A circumferential groove 8 is formed which engages with check balls 9, 9, which are part of the component. The pins 7, 7 are inserted into holes drilled from one side of the transmission cover K together with the select return springs 10, and the plug bolts 11
It is locked in the hole by means such as. As shown in FIG. 3a, this hole is provided at a location parallel to and approximately at the same height as the axis of the inner shaft 2. Also, check springs 12, 12 press the check balls 9, 9 toward the circumferential grooves 8, 8.
is inserted into a hole formed in the transmission cover K so as to be perpendicular to the check pins 7, 7, and is sealed with a locking plate 13 or the like.

Since the transmission operating mechanism according to the present invention is configured as described above, selection is made by moving the shift lever 1 in the axial direction, as in the conventional one.
The shift lever 1 is shifted by rotation, and the protrusion T of the shift lever 1 cooperates with the select check pins 7 and 7 as the select operation is performed.According to the present invention, the select check and return mechanisms C and R are connected to the cover of the transmission. Since the inner shaft is provided at K, there is no need to make a groove in the inner shaft compared to the conventional one shown in FIG. 1, and therefore manufacturing is easier. In particular, the selection check and return mechanism can be formed simply by drilling holes in the transmission cover and inserting check pins 7, 7, balls 9, 9, springs 10, 10, 12, 12, etc., which makes assembly easy. There are also big profits from above. It is also clear that the selection feeling is improved because the sliding resistance is reduced structurally. Furthermore, the conventional one shown in FIG. 2 has a shifter 40.
Since the select check and return mechanism are built into the transmission cover, the structure is complicated and the manufacturing cost is high, and the shifter is built into a moving shifter, making it unstable. Since the select check and return mechanism is provided in the camcorder, the above-mentioned drawbacks of the prior art are eliminated. That is, the processing of the shifter 1 and the check pins 7, 7 is greatly simplified in the present invention.

[Brief explanation of the drawing]

1 and 2 are close sectional views of a conventional transmission operating mechanism, and FIG. 3a is a partial sectional view showing one embodiment of the transmission operating mechanism according to the present invention.
Figure b is a sectional view taken along line A-A. 1...Shift lever, 7...Select check pin, 9...Select check ball, 10...
Select return spring, 12...Select check spring, C...Select check mechanism, R...Select return mechanism, K...Transmission cover, T...Protrusion.

Claims (1)

[Scope of utility model registration request] A shift lever is provided that is slidable with respect to the inner shaft but rotates integrally with the inner shaft, and as the shift lever moves in the axial direction, the engaging portion of the shift lever selectively engages with the shifter, thereby shifting the shift lever. In a transmission operating device in which a shift is operated by rotating a lever, a pair of opposing holes are formed in a cover of the transmission parallel to an axis of an inner shaft and at approximately the same height as the inner shaft. , a return spring and a check pin inserted into each hole, a circumferential groove formed in the check pin, and a check ball press-fitted into the circumferential groove by the check spring, and between the pair of opposing check pins. , a transmission operating mechanism characterized in that a projection provided on a shift lever is arranged.