JPH057855Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a shift lever support device for an automobile that prevents engine and vehicle vibrations from being transmitted to the shift lever.

(Prior art and its problems) In floor shift type transmissions used to perform gear shifting operations in vehicles, a shift lever, also known as a change lever or operation lever, is used to shift the gears directly or by a gear shifting rod. The gear shift mechanism is controlled by operating the shift fork through a control rod.

The shift lever is rotatably supported by the housing, and for rear-wheel drive vehicles,
Since the engine is often installed vertically, a direct control system is adopted in which the housing is fixed to the transmission case located behind the engine, and the shift fork is operated directly by the shift lever. ing. Furthermore, in the case of front-wheel drive vehicles, since the engine is often placed horizontally, the engine block and the housing are connected by a support rod, and the shift fork is also called a transmission rod or control rod. It uses a remote control system that operates via a rod that is connected to the machine. Engine vibrations and vehicle vibrations may be transmitted to these shift levers, causing them to vibrate and generate noise due to this vibration.When shifting gears, vibrations may be transmitted from the shift lever to your hands. Operability may not be good.

Therefore, as shown in Japanese Utility Model Application Publication No. 56-6632, conventionally, the bushing as a bearing member supporting the spherical part formed on the shift lever was replaced with an elastic pressing part or wave washer integrated with the dust cover. Therefore, it is pressed to prevent vibration of the shift lever. However, the shift lever is not only subjected to vibrations in its axial direction but also in its radial direction, and vibrations are also applied in the direction in which the shift lever is rotated. When the bush is mounted on the housing so that its outer peripheral surface is in direct contact with the supporting case or housing, radial vibrations of the bush will be transmitted to the housing due to this direct contact. In the shift lever support device shown in Japanese Utility Model Application Publication No. 56-164315, the ball seat as a bearing member is mounted so that its outer circumferential surface is in direct contact with the bearing tube, that is, the housing. .

If the housing is formed by forging etc. and then manufactured by machining such as cutting, the inner surface of the housing can be finished with relatively high precision, but considering mass production. Since it involves a machining process, manufacturing efficiency is not good. Therefore, the housing is manufactured by press working using a steel plate as the housing material, but when the housing is manufactured by press working, the inner surface accuracy of the housing is lower than in the case of machining. Otherwise, play may occur between the outer periphery of the bearing and the inner surface of the housing.

Therefore, as shown in Japanese Utility Model Application Publication No. 56-102733, the bushing as a bearing member is formed smaller than the inner diameter of the bushing as a housing, and there is a gap between the outer circumferential surface of the bearing member and the inner circumferential surface of the housing. There is a device in which an O-ring is attached to a bearing member to create a gap and absorb this play. However, since the axial movement of the bearing member is regulated by the metal snap spring, the axial vibration of the shift lever is transmitted to the housing via the snap spring.

Further, Japanese Utility Model Publication No. 57-161527 discloses a bearing member in which the entire outer peripheral surface of a bushing and the upper and lower surfaces of the bushing are covered with an elastic material integrated with a dust boot. If the entire outside of the bushing is simply covered with an elastic material in this way, if the machining error of the housing becomes large, the bushing will be strongly pressed against the spherical surface by the housing, increasing friction and reducing the transmission of vibration. This makes it difficult to obtain a sufficient vibration-proofing effect.
In particular, when this device is applied to a remote control type transmission, the housing is connected to the engine block by a support rod, and this support rod causes the housing to vibrate in the direction of tilting. A large amount of vibration is transmitted to the housing. Therefore, the vibration of the housing is transmitted to the shift lever, causing the shift lever to vibrate.

The present invention has been developed in view of the problems of the prior art described above, and is designed to prevent vibrations from being transmitted to the shift lever without changing the contact resistance of the sliding part of the shift lever as much as possible, and to prevent the transmission of vibrations to the shift lever, and to improve the operation of the shift lever. The purpose is to improve sexuality.

(Means for Achieving the Object) In order to achieve the above object, the present invention includes a shift lever having a spherical part between an operating shaft part and an operating shaft part, which is tiltably supported by the spherical part. In the shift lever support device, a bearing cylinder having a spherical inner surface that contacts the spherical portion is installed in the housing at a predetermined distance from the inner surface of the housing, and the spherical portion side of the operating shaft portion is mounted in the housing at a predetermined distance from the inner surface of the housing. A first vibration isolating part that fits between the lower end corner of the bearing cylinder and the housing is integrally molded into a dust boot made of an elastic material such as rubber to cover the housing, and a first vibration isolating part made of an elastic material such as rubber to cover the housing. integrated into the dust cover of
A second vibration isolating portion is formed to fit between an upper end corner of the bearing cylinder and the housing, and a second vibration isolator is formed on an outer circumference of at least one of the upper and lower ends of the bearing cylinder in the axial direction of the bearing cylinder. The shift lever support device includes a pressure receiving portion that protrudes and is located at least radially outward from the spherical inner surface of the bearing cylinder.

(Function) A spherical part made of metal is supported by a bearing cylinder so that its spherical inner surface is in contact with the spherical part, and this bearing cylinder is supported by a rubber part located between the upper and lower corners of each end and the housing and separated from each other. Since the bearing cylinder is supported by the vibration isolating part, the bearing cylinder receives an elastic force directed toward the center of the spherical part from the vibration isolating part and is supported within the housing. Furthermore, when the bearing cylinder and the shift lever vibrate in a direction that deviates from each other in the axial direction or in a direction that causes them to tilt, the position that is farthest from the corner of the bearing cylinder, that is, the center of the spherical part, The bearing cylinder will vibrate so that the amplitude is the maximum, but since the upper and lower corners, where the amplitude is relatively large, are supported by the vibration isolating part, which is a vibration absorbing member, the vibration is reduced. Sufficient attenuation is achieved,
Vibration of the shift lever is now prevented.
Furthermore, since the vibration isolation section is separated into upper and lower sections, the degree of freedom in tuning vibration isolation is greatly increased, such as by using different members for the upper and lower sections.
Vibration damping properties have been improved. Moreover, since each vibration isolating part is integrated with the dust cover and the dust boot, it is possible to reduce the number of parts, and as a result, it is possible to improve the workability of assembling the device. In addition, since a pressure receiving part located radially outward from the spherical inner surface is formed on the outer circumference of at least one of the upper and lower ends of the bearing cylinder, a large error occurs in the axial dimension of the housing, and even if vibration Even if the part is strongly tightened in the axial direction between the housing and the housing, the pressure-receiving part is mainly deformed.
There is almost no change in the shape of the spherical inner surface formed in the bearing cylinder, and the frictional force between the spherical part and the bearing cylinder can be maintained constant.

(Example) Hereinafter, the illustrated example of the present invention will be described. FIG. 1 is a diagram showing a shift lever support device according to an embodiment of the present invention.

As shown in FIG. 1, a shift lever 1 includes an operating shaft portion 2 operated by a vehicle driver, an operating shaft portion 3 connected to a control rod, and a spherical portion provided between these. 4, and is made of metal material such as steel. shift lever 1
is a part of the spherical part 4, which is supported by the housing 5 so as to be tiltable around the spherical part 4. The housing 5 includes a cylindrical housing body 8 having a flange portion 6 bent radially inward at the upper end and a flange portion 7 bent radially outward at the lower end. A base plate 10 is connected to the base plate 10 by a screw member 9 at the flange portion 7.

A bearing cylinder 11 is mounted within the housing 5 at a predetermined distance from the inner surface of the housing 5. This bearing cylinder body 11 has
A spherical inner surface 1 that contacts the spherical portion 4 of the shift lever 1
2 is formed, and when the driver tilts the shift lever 1 during gear change operation, the spherical portion 4 slides along the spherical inner surface 12 of the bearing cylinder body 11.

In order to prevent sand, mud, moisture, dirt, etc. from outside the vehicle from entering the bearing cylinder body 11, a dust boot 13 made of an elastic material such as rubber is provided to cover the portion of the operating shaft portion 3 on the spherical portion 4 side. is attached to the shift lever 1 at a fitting portion 14 that fits into the operating shaft portion 3 of the shift lever 1. This dust boots 1
3 is integrally formed with a vibration isolating portion 16 that fits between the lower end corner portion 15 of the bearing cylinder body 11 and the housing 5. The vibration isolating portion 16 has a predetermined length in the inner radial direction of the lower end surface with the edge portion 17 of the lower end corner portion of the bearing cylindrical body 11 as the center, and further extends toward the outer peripheral surface of the bearing cylindrical body 11. It has a predetermined length upwardly. This dust boot 13 completely isolates the spherical portion 4 from the outside of the vehicle.

In consideration of ease of assembling the bearing cylinder 11 and the dust boot 13, an engagement protrusion 18 is formed at the upper end of the vibration isolating part 16 and projects radially inward. An annular outer circumferential groove 19 is formed in which the engagement protrusion 18 engages.

A dust cover 22 made of an elastic material such as rubber is attached between a rising portion 21 formed on a floor panel of the vehicle body and a flange portion 6 of the housing 5. This dust cover 22
1 and an engaging portion 24 that engages with the flange portion 6 of the housing 5, so as to cover the housing 5. This dust cover 22 is integrally formed with a vibration isolating portion 26 that fits between the upper end corner portion 25 of the bearing cylinder 11 and the housing 5.

A pressure receiving portion 29 having a predetermined length in the radial direction is formed at the upper end of the bearing cylinder 11 so as to protrude in the axial direction from the edge portion 27 of the upper end corner 25 of the bearing cylinder 11 . The vibration isolating portion 26 is adapted to engage with a pressure receiving portion 29 formed at the upper end portion of the bearing cylinder 11.

The detailed structure of the bearing cylinder 11 shown in FIG. 1 is shown in FIGS. 2A and 2B. As shown in the figure, the bearing cylinder 11 has an overall cylindrical shape,
Polyacetal or the like is used as the resin material. Further, the bearing cylinder 11 has an opening on the lower end surface, and a plurality of lower slits 31 having a predetermined length are formed from there toward the upper end. An upper slit 32 having a predetermined length toward the lower end is formed between the lower slits 31. By forming the lower slits 31 and the upper slits 32 alternately in the circumferential direction of the bearing cylindrical body 11 in this way, the entire bearing cylindrical body 11 can be made without reducing the rigidity or hardness of the material itself. As a result, the bearing cylindrical body 11 becomes easily deformed, and the bearing cylindrical body 11 and the shift lever 1
Since the bearing cylindrical body 11 is largely deformed radially outward during assembly, the spherical portion 4 can be easily fitted into the bearing cylindrical body 11.

To assemble the shift lever support device as described above, while engaging the engaging portion 24 of the dust cover 22 with the flange portion 6 of the housing body 8,
The engaging protrusion 18 of the dust cover 13 is engaged with the outer circumferential groove 19 of the bearing cylinder 11 to integrate the dust cover 13 and the bearing cylinder 11, and the bearing cylinder 11 is connected to the spherical part of the shift lever 1. 4, the bearing cylinder body 11 is installed into the housing body 8 from below. And the housing body 8
A base plate 10 is attached to the flange portion 7 of this using screw members 9. This base plate 10 is integrated with the support plate, and the housing body 8 is assembled to the engine block via this support rod. Incidentally, this support rod is also connected to the vehicle itself by a connecting member having vibration-proof rubber (not shown) at the base plate 10.

FIG. 5 shows the state in which the support device thus assembled is assembled into a vehicle. The housing 5 is connected to the engine block 3 through a portion of the base plate 10 by a support rod 35.
6, and the shift lever 1 is connected to its operating shaft portion 3.
The control rod 37 is connected to a shift fork (not shown) of a transmission 38. When the shift lever support device is assembled to the vehicle in this way, the engine block 36 and the transmission 3 of the support rod 35 and control rod 37 are
The parts connected to the support rod 35 vibrate in the vertical direction and in the radial direction in the front, rear, left, and right directions due to engine vibration, and also vibrate in the direction in which each connection part tilts. and is transmitted to the housing 5 and the shift lever 1 via the control rod 37, respectively. Note that the reference numeral 39 indicates a knob attached to the operating shaft portion of the shift lever 1, and the reference numeral 4
0 indicates room dust boots.

In particular, when a remote control system is adopted as in the case of a transmission in a front-wheel drive vehicle as described above, the housing 5 is moved around the point O in FIGS. 1 and 2 in FIG. 5. The support rod 35 vibrates in the direction shown by the arrow A, but in the present invention, the vibration isolating parts 16 and 26 cause the bearing cylinder 11 to vibrate mainly at both the upper and lower corner parts 15 and 25. Edge part 1
Centered around portions 7 and 27, it is supported by receiving an elastic force directed toward the center O of the spherical portion 4, as shown by arrow B in FIG. 2B. In this way, the bearing cylinder 11 moves in the direction toward the center O of the spherical part 4 as shown by the arrow B in FIG. 2B, with the vibration isolating part 16,
Since the shift lever 1 and the housing 5 vibrate relative to each other in the axial direction, radial direction, and tilting direction, all of these vibrations are absorbed by the vibration isolating part 16. , 26, the bearing cylinder 11 is supported while being attenuated.

Moreover, when the housing 5 and the shift lever 1 vibrate in the direction of being axially shifted from each other as shown by arrow C in FIG. 2B, or in the direction of tilting as shown by arrow A, In this case, the bearing cylinder 11 is deformed and vibrates. The amplitude due to this vibration is the center O of the spherical portion 4, that is, the edge portion 17 at the farthest position from the spherical center of the spherical inner surface 12, as shown in the figure.
The part numbered 27 is the largest. And the vibration isolator 1
6 and 26 are located at both the upper and lower corners 15 and 25 of the bearing cylinder body 11 with the edge portions 17 and 27 at the center, so that the portions having the maximum amplitude are located at the vibration isolating portions 16 and 17 which are vibration absorbing members. , it is possible to effectively prevent vibrations from being transmitted to the shift lever 1.

Further, as shown in FIG. 1, the vibration isolating section is composed of two vibration isolating sections: a vibration isolating section 16 in contact with the lower end corner of the bearing cylinder and a vibration isolating section 26 in contact with the upper end corner. Therefore, the upper and lower vibration isolators can each independently cope with vibrations, thereby further improving vibration isolation. Note that a configuration with even better vibration isolation properties may be achieved by forming the respective vibration isolation parts using different materials.

Furthermore, when the driver applies operating force to the shift lever 1 in the direction indicated by arrow F in FIG. 5 when operating the shift lever 1 to change gears, the shift lever 1 bends as shown in the figure. Therefore, the reaction force acts in a direction substantially from the center of the spherical portion 4 toward the edge portions 17 to 27. At this time, the vibration isolator 1
Since the bearing cylinder body 11 receives the elastic force from the vibration isolation parts 16 and 26, the so-called lever rigidity during operation of the shift lever 1 can also be obtained by these vibration isolation parts 16 and 26. Improved operability can also be achieved.

The above-mentioned vibration-proofing effect and improvement in shift lever operability are achieved because the gap S is formed between the center of the outer circumferential surface of the bearing cylinder 11 and the inner circumferential surface of the housing 5, so that the upper and lower vibration-proofing parts Comrades 16 and 26 were able to perform well without influencing each other.

It has been found that the vibration of the shift lever 1 is greatly influenced by the friction between the spherical portion 4 of the shift lever 1 and the spherical inner surface 12 of the bearing cylinder 11, that is, the frictional resistance. In other words, if the spherical inner surface 12 of the bearing cylinder 11 comes into strong contact with the spherical portion 4, even if the vibrations from the engine or the like have the same amplitude, the vibrations will be largely transmitted to the shift lever 1.

However, as in the present invention, the pressure receiving part 29 is formed to protrude from the upper end of the bearing cylinder 11, and the inner diameter D of the pressure receiving part 29 is the diameter of the spherical part 4, that is, the spherical shape, as shown in FIG. 2B. By setting the inner diameter d of the inner surface 12 to be larger than the inner diameter d and providing a deviation R in the radial dimension between the spherical inner surface 12 and the pressure receiving portion 29, the elastic force of the vibration isolating portions 16 and 26 changes greatly. However, the frictional resistance no longer changed significantly.

In other words, when manufacturing the housing 5, the machining error in the axial direction becomes large, and each vibration isolator 1
Even if the force that tightens the bearing cylinder 11 in the axial direction is increased by the screws 6 and 26, due to the existence of the deviation R, the portion of the bearing cylinder 11 that is mainly outside the diameter D is deformed. The inner part is not deformed, and there is not much change in the contact pressure between the spherical part 4 and the spherical inner surface 12 of the bearing cylinder 11 that contacts it, and the frictional resistance force when operating the shift lever 1 is reduced. It became possible to maintain the desired state. Since it is possible to maintain the shift lever 1 in a desired state without increasing the frictional resistance applied to it in this way, it is not only possible to maintain the operating force of the shift lever 1 in a desired state, but also to increase the frictional force. It was possible to reduce the vibration transmitted to the shift lever 1 from the viewpoint of preventing the expansion of vibration. As shown in FIG. 2A, the bearing cylinder 11 has a large number of lower slits 31 and upper slits 32.
In particular, when the spherical portion 4 and the spherical inner surface 12 were provided, the frictional resistance force between the spherical portion 4 and the spherical inner surface 12 did not change much regardless of the change in the magnitude of the tightening force to the pressure receiving portion 29.

As mentioned above, the vibration isolation effect is greatly affected by the tightening allowance of each vibration isolation part 16, 26, but the manufacturing error of the housing 5 becomes large, and the vibration isolation part Even if 16 and 26 are strongly tightened, each part can be displaced along the axial direction on the outer circumferential surface of bearing cylinder 11 in the gap S. The tightening pressure applied to the bearing cylinder 11 does not change significantly, and the desired vibration damping effect can be maintained.

Furthermore, since the vibration isolating section 16 is integrated with the dust boot 13 and the vibration isolating section 26 is integrated with the dust cover 22, not only the number of parts of the entire device is reduced, but also the assembly of the device becomes extremely easy. .

Moreover, FIG. 3 shows a bearing cylinder body 11 according to another embodiment.
a, in this case, the bearing cylinder body 11a
In order to facilitate assembly into the housing 5, the bearing cylinder body 11a is divided into left and right parts 42 and 43 by a dividing plane in the longitudinal direction, that is, in the axial direction of the bearing cylinder body 11a. In this case as well, slits 31 and 32 may be formed as in the bearing cylinder 11. The other structure is the same as that of the bearing cylinder body 11 in the previous embodiment, and the same parts are given the same reference numerals.

FIG. 4A is a diagram showing another embodiment of the dust cover. In this case, the dust cover 22a is also formed with an engaging protrusion 18a, and this engaging protrusion 18a
An outer circumferential groove 19a that engages with the bearing cylinder body 11 is formed in the bearing cylinder body 11. The other structure is the same as that of the previous embodiment.
In addition, as shown in FIG. 4A, FIG. 4B shows that the dust cover 22a has the engaging protrusion 18a, but the dust boot 13 does not have the engaging protrusion 18 shown in FIG. Indicate the case. In this way, the dust cover 22, the dust boot 13, and the bearing cylinder body 11 can be modified in various ways.

(Effects of the invention) As described above, according to the invention, a metal spherical part is supported so that the bearing cylinder is in contact with its spherical inner surface, and this bearing cylinder is connected to the upper and lower corners of the metal spherical part and the housing. The engine, etc. is supported by a rubber vibration isolator located between and separated from each other so that elastic force acts toward the center of the spherical inner surface of the bearing cylinder. The vibrations applied to the bearing cylinder body in all directions including the axial direction, radial direction, and tilting direction are reliably damped, and vibration of the shift lever is prevented. In particular, in response to vibrations in the axial direction and tilting direction of the bearing cylinder, both the upper and lower corners of the bearing cylinder vibrate and are greatly deformed, but vibration isolators are provided in these parts. Therefore, a remarkable anti-vibration effect can be obtained. Moreover, since each vibration isolating part is integrated with the dust cover and the dust boot, the number of parts can be reduced and the workability of assembling the device can be improved. In addition, since a pressure receiving part is formed on the outer periphery of at least one of the upper and lower ends of the bearing cylinder,
Even if a large error occurs in the axial dimensions of the housing, the shape of the spherical inner surface formed in the bearing cylinder does not change, making it possible to maintain a constant resistance force between the spherical part and the bearing cylinder. can.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a shift lever support device according to an embodiment of the present invention, FIG. 2A is an enlarged perspective view of the bearing cylinder shown in FIG. 1, and FIG. FIG. 3 is a perspective view showing a bearing cylinder according to another embodiment of the present invention, FIGS. 4A and B are sectional views each showing another embodiment of the present invention, and FIG. FIG. 2 is a schematic side view showing a state in which the shift lever shown in FIG. 1 is mounted on a vehicle. 1...Shift lever, 2...Operation shaft, 3...
Operating shaft portion, 4... Spherical portion, 5... Housing, 1
1...Bearing cylinder body, 13...Dust boot, 15...
...Lower end corner, 16...Vibration isolator, 22...Dust cover, 25...Upper end corner, 26...Vibration isolator, 29
...Pressure receiving part.

Claims (1)

[Claims for Utility Model Registration] A support device for a shift lever in which a shift lever having a spherical portion between an operating shaft portion and an operating shaft portion is tiltably supported by the spherical portion, the shift lever being in contact with the spherical portion. A bearing cylinder body having a spherical inner surface is mounted in a housing at a predetermined distance from the inner surface of the housing, and is integrated with a dust boot made of an elastic material such as rubber that covers the spherical part side of the operating shaft part. A first vibration isolating part is formed to fit between the lower end corner of the bearing cylinder and the housing, and is integrally attached to a dust cover made of an elastic material such as rubber that covers the housing. A second vibration isolating portion is formed to fit between the upper end corner portion and the housing, the second vibration isolating portion is formed on an outer peripheral portion of at least one of the upper and lower ends of the bearing tube, and protrudes in the axial direction of the bearing tube, and has at least A shift lever support device comprising a pressure receiving portion located radially outward from the spherical inner surface of the bearing cylinder.