JPS641141Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in the boot mounting structure of a change lever.

Conventionally, there have been support structures for this type of change lever, such as those shown in FIGS. 1 and 2, for example. A bracket 2 is disposed at the tip of a support rod 1 extending from a transmission main body (not shown), a socket 3 having a substantially hatch-shaped cross section is placed over an opening provided in the bracket 2, and the socket 3 Bracket 2
A spherical portion 5 is fixed to the edge of the opening of the socket 3 and is bulged at a position near the lower part of the change lever 4 within the socket 3.
is supported as a fulcrum for the center of rotation of the change lever 4.

An insertion hole 7 is bored in the upper surface of the socket 3, through which the upper shaft part 6 of the change lever 4 is inserted, and the upper part extends upward from the ball part 5 housed in the cylindrical body part 8 of the socket 3. A transmission (not shown) is provided at the lower end of the lower shaft part 10, into which the shaft part 6 is inserted, and which extends downward from the ball part 5 of the change lever 4, which projects downward from the lower opening 9 of the socket 3. One end of the control rod 11 to be connected is pivotally supported. The spherical portion 5 has resin bearings 12a and 12b formed into upper and lower halves, the outer circumferential surface of which abuts against the inner surface of the body portion 8 of the socket 3, and the inner circumferential surface of which abuts along the outer surface of the spherical portion 5. In particular, the lower bearing 12b is supported by
The lower end portion is supported in contact with the peripheral edge of the opening of the bracket 2, and supports the ball portion 5 from below, while the upper bearing 12a is a coil spring 13 pushed into an upper position inside the body portion 8 of the socket 3. The sphere 5 is supported from above by the downward force. Further, an outward flange 14 is provided at the lower opening edge of the socket 3, and bolt insertion holes 15a and 15b are formed in the mating surfaces of the outward flange 14 and the bracket 2, respectively. And these bolt insertion holes 15a, 15
The socket 3 is fixed to the bracket 2 by tightening the bolt 16 inserted through b with the nut 17. At that time, a ring is used to close the lower opening 9 of the socket 3 to prevent dust from entering into the lower opening 9. The outer mounting surface 19 of the shaped rubber boot 18 is fastened to the bracket 2 and the outward flange 14 via a washer 20, and the inner peripheral edge of the boot 18 is in elastic contact with the lower shaft 10 of the change lever 4. has been done. Incidentally, reference numeral 21 in FIG. 2 is a cover that covers the upper part of the socket 3.

However, according to such a conventional change lever boot mounting structure, since the outer part of the boot 18 is fastened together with the socket 3 and the bracket 2, if the boot 18 deteriorates over time, In this case, the tightening torque of the bolt 16 decreases, causing loosening between the socket 3 and the bracket 2. As a result, a gap is created between the socket 3 and the bearing 12, causing play, resulting in poor operability of the change lever 4. Conventionally, as a means to solve this problem, the inner circumferential wall of the bolt insertion hole 15a formed in the outward flange 14 of the socket 3 is burred to stand up, and this raised part is connected to the bolt insertion hole 15b of the bracket 2 and the boot. 18 into the bolt insertion hole 15c,
The three members are fastened and fixed together by a so-called metal contact connection in which the threaded portion of the bolt 16 is screwed into the rising portion. However, with such a tightening structure,
Although the tightening torque between the socket 3 and the bracket 2 does not change even if the boot 18 deteriorates over time, the periphery shape of the bolt insertion hole 15a becomes complicated due to burring, and There was a problem that the number of man-hours increased and the manufacturing cost increased accordingly.

The present invention has been developed by focusing on the above-mentioned conventional problems, and its purpose is to provide a change lever boot mounting structure that is simple and does not change the tightening torque between the socket and the bracket over time. This is what we provide. As a means to achieve the above object, the present invention provides a support bracket with an opening through which the shaft of the change lever is inserted, and fixes the peripheral edge of the socket placed over the opening to the bracket. At the same time, a bulging ball portion formed on the change lever is housed in this socket, and this ball portion is supported by a bearing whose lower end is placed on the periphery of the opening of the bracket and whose upper end is pressed and supported by an elastic member. In the support structure of the change lever, the change lever is supported as the central axis of swing of the change lever, and the opening of the bracket is closed by a flexible boot through which the shaft of the change lever is inserted. A protrusion extending downward from the peripheral edge of the opening is provided, an engagement protrusion is provided on either the protrusion or the boot, and an engagement groove into which the engagement protrusion is fitted and fixed is provided on the other, The gist is that a boot is fitted into the bracket from the lower side and is fixed to the protrusion of the bearing.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

In the embodiment shown in FIGS. 3 and 4,
This shows a support structure for the change lever that is almost the same as the conventional one, and the ball part 5 of the change lever 4 is housed in the body part 8 of the socket 3, which has a roughly hat-shaped cross section, and this ball part 5 is formed into two parts, upper and lower. It is supported from above and below by ring-shaped bearings 12a and 12b made of resin. In this embodiment, the inner lower part of the lower bearing 12b is formed to protrude downward from the peripheral edge of the opening of the bracket 2, and the outer peripheral surface of the protrusion 22 has an engagement groove 23 having a spherical recess at the bottom. are provided all around. on the other hand,
The boots 18 are made of an elastic material such as rubber and are shaped like a bowl.
An opening is provided at the bottom, and an engaging protrusion 24 with a bulged tip that fits into the engaging groove 23 is formed inward at the upper inner circumferential edge. Further, in this embodiment, the peripheral edge of the opening of the bracket 2 rises along the inner wall surface of the socket 3, and the horizontal opening flange 25 provided at the tip of the opening flange 25 extends around the outer peripheral edge of the lower bearing 12b. supports the department. In this embodiment as well, the upper half of the spherical portion 5 is supported by the upper spring 12a biased by the spring 13.

Therefore, when supporting the change lever with such a configuration, the spring 13 and the upper bearing 12a are first housed inside the socket 3, and the shaft portion 6 of the change lever 4 is inserted into the insertion hole from below the socket 3. 7 and insert the bulb 5 into the socket 3.
It is stored in the body part 8 of. Then, the lower bearing 12b is fitted from the lower side of the ball portion 5, and the socket 3 is inserted with the aperture flange 25 of the bracket 2 being pressed and supported by the outer peripheral edge of the lower bearing 12b.
The bolts 16 are passed through the bolt insertion holes 15a and 15b of the outward flange 14 and the bracket 2, and the nuts 17 are tightened from the upper surface side of the outward flange 14. In this state, the ball portion 5 is supported from above and below by the upper and lower bearings 12a, 12b, and rotates while sliding on the inner peripheral surfaces of the bearings 12a, 12b when the change lever 4 is operated. Finally, the boot 18 is fitted into the lower shaft part 10 from the lower side of the ball part 5, and the lower bearing 1
The engagement protrusion 24 of the boot 18 is press-fitted and engaged with the engagement groove 23 provided in the protrusion 22 of the boot 18, and the inner peripheral end 26 of the central opening of the boot 18 is inserted into the lower shaft of the change lever 4. 10 to close the opening of the bracket 2 and the lower opening 9 of the socket 3 to prevent dust and the like from entering into the socket 3. As a result, in this boot mounting structure, the boot 18 can be fixed simply by fitting the engagement protrusion 24 into the engagement groove 23 of the lower bearing 12b, so that the boot 18 is extremely easy to attach. Also,
Since the distal end bulge of the engagement protrusion 24 is horizontally fitted into the spherical recess of the engagement groove 23, the attachment is reliable and there is no risk of the boot 18 coming off due to running vibrations, etc. There is no. Furthermore, since the boot 18 is fitted over the entire circumference of the lower bearing 12b, the sealing performance is good and the intrusion of dust etc. can be reliably prevented. Furthermore, since the boot 18 is attached separately from the fixation between the socket 3 and the bracket 2, the outward flange 14 of the socket 3 and the bracket 2 can be fixed in close contact with each other. The tightening bolts 16 do not loosen due to deterioration over time. Incidentally, reference numeral 21 in FIG. 3 is a cover that covers the upper part of the socket 3.

FIG. 5 shows another embodiment of the present invention, in which the engaging portion provided on the lower bearing 12b is an engaging protrusion 24', and the engaged portion provided on the boot 18 is an engaging groove 23'. '. That is,
In this embodiment, the protrusion 2 of the lower bearing 12b
An engagement protrusion 2 protruding outwardly on the outer peripheral edge of 2
4' is provided, and an engaging groove 23 in which the engaging protrusion 24' fits is formed inward at the upper inner circumferential edge of the boot 18.The functions and effects of this support structure are as follows. This is the same as in the previous embodiment.

Note that the bearing may not be formed separately as in the above embodiment, but may be formed integrally, and the material of the bearing is not limited to resin, and the shape etc. may also be various. things can be applied.

As explained above, according to the change lever boot mounting structure according to the present invention, the mounting of the boot is done separately from the fixing of the socket and the bracket, so even if the boot deteriorates due to changes in diameter, it can still be attached to the socket. The bolt tightening torque between the bracket and the bracket does not change, so there is no risk of injury if the bolt loosens and the socket rattles. Further, since the boot can be fixed to the bearing simply by fitting the engagement groove and the engagement protrusion, the installation work is extremely simple. Furthermore, when the two are engaged, the swollen tip of the engagement protrusion completely fits into the spherical recess of the engagement groove, ensuring secure attachment, and preventing the fit from loosening due to running vibrations or the boot falling off. I have never put it away. Furthermore, since the engagement between the two is carried out over the entire circumference of the boot and the bearing, the sealing performance is improved and the effect of reliably preventing dust etc. from entering from the engagement part is achieved. play.

[Brief explanation of drawings]

Fig. 1 is an overall view of the change lever support structure, Fig. 2 shows an example of a conventional change lever boot mounting structure, an enlarged cross-sectional view of section A in Fig. 1, and Fig. 3 is an overview of the change lever support structure according to the present invention. An example of the boot mounting structure is shown in Fig. 1, an enlarged sectional view of part A, and Fig. 4.
This figure is an explanatory diagram showing the means for engaging the bearing and the boot in the embodiment according to FIG. 3, and FIG. 5 is an explanatory diagram showing another example of the means for engaging the bearing and the boot. 2... Bracket, 3... Socket, 4... Change lever, 5... Ball, 8... Body, 9...
Lower opening, 12a, 12b...Bearing, 18
...Boot, 23, 23'...Engagement groove, 24, 2
4′...Engagement protrusion.

Claims (1)

[Claims for Utility Model Registration] An opening is provided in the support bracket through which the shaft of the change lever is inserted, and the peripheral edge of the socket placed over the opening is fixed to the bracket, and the socket is inserted into the socket. A bulging ball is housed in the change lever, and this ball is placed at the center of swing of the change lever by a bearing whose lower end is placed on the periphery of the hole in the bracket and whose upper end is supported by an elastic member. In the support structure of the change lever, which is supported as a shaft and whose opening in the bracket is closed by a flexible boot through which the shaft of the change lever is inserted, the lower part of the bearing is located below the periphery of the opening in the bracket. A protrusion extending from the bottom of the bracket is provided, an engagement protrusion is provided on either the protrusion or the boot, and an engagement groove into which the engagement protrusion is fitted and fixed is provided on the other. A boot mounting structure for a change lever, characterized in that the inserted boot is fixed to the protrusion of the bearing.