JPH0649146U - Shift gear structure of automatic transmission - Google Patents

Abstract

(57) [Summary] [Purpose] The number of parts is small and the assembly operation is easy.
In addition, it is possible to more efficiently assemble the gear shift operation device than in the past. [Structure] The shift lever 2 includes a cylindrical outer cylinder 21 rotatably supported around a horizontal axis, and a push rod 22 fitted inside the outer cylinder 21.
A guide hole 26 extending vertically is formed in the lower part of
A cam 23 to be pressed is provided at the upper end of the push rod 22, and a guide pin holding portion 24 that holds a guide pin 25 orthogonal to the push rod 22 is provided at the lower end.
The guide pin 25 held by the guide pin holding portion 24 is slidably fitted in the guide hole 26, and a coil spring 27 for pushing the push rod 22 upward is installed at the bottom of the outer cylinder 21. The push rod 22 is integrally formed of synthetic resin.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a shift lever provided upright on a gear shift operation device of an automatic transmission of an automobile.

[0002]

[Prior art]

 Conventionally, there is known a shift operation device 10 for an automatic transmission for a vehicle, as illustrated in FIG. Normally, the gear shift operating device 10 is provided on the side of the driver's seat so that the driver operates the gear shift operating device 10 so that the engine speed is transmitted to the wheels at a predetermined reduction ratio. Has become. The shift operating device 10 is basically composed of a base plate P on which various members are arranged, and a shift lever 20 erected on the base plate P. The upper portion of the gear shift operation device 10 is covered with the operation plate T in a state where the shift lever 20 is projected upward, and the appearance is beautiful. At a substantially central portion of the base plate P, there is provided a lever support portion 4 formed by being depressed.

On the other hand, a pipe-shaped boss 3 is horizontally attached to a lower end portion of the shift lever 20, and a bolt B as a horizontal shaft is inserted into an insertion hole of the boss 3 via a lever support portion 4. It is passed through and fastened with a nut (not shown). Therefore, the shift lever 20 is rotatably supported in the lever support portion 4 around the bolt B. The transmission of the automobile carries out a predetermined shift operation according to the rotational position of the shift lever 20 around the bolt B.

Such a shift lever 20 is composed of a cylindrical outer cylinder 201 and a push rod 202 fitted inside the outer cylinder 201, and an upper portion of the push rod 202 is covered. A pressing cam 203 is screwed, and a guide pin holding portion 204 is provided at the bottom. A guide pin 205 is horizontally projected from the guide pin holding portion 204, and the guide pin 205 is fitted in a vertically long guide hole 26 provided in a lower portion of the outer cylinder 201.

A coil spring 27 as an urging means is arranged below the guide pin holding portion 203, and pushes the outer cylinder 201 upward through the guide pin holding portion 204. Therefore, by pushing a push button (not shown) provided on the top of the shift lever 20, this pushing force is transmitted to the guide pin provided on the guide pin holding portion 204 below the push rod 202 via the cam 203. The guide pin 205 descends while being guided by the guide hole 26.

The vertical movement of the guide pin locks or unlocks the rotation of the shift lever 20 around the boss 3.

[0007]

[Problems to be solved by the device]

 By the way, in the conventional shift lever 20 as described above, the push rod 202 fitted into the inner portion of the outer cylinder 201 is made of metal and is heavy, and the rod 202 is usually manufactured by cold forging. However, there is a drawback that the manufacturing cost is high because the male screw is screwed on the upper portion of the cam 203, which is separately manufactured and screwed with the cam 203 provided with the female screw corresponding to the male screw. . Moreover, the cam 203 must be screwed onto the top of the push rod 202 or the guide pin 205 must be press-fitted into the guide pin holding portion 204 during assembly, which makes the assembly operation troublesome and has a large number of parts. It had a drawback.

The present invention has been made to solve the above-mentioned problems, and is lightweight, easy to manufacture and inexpensive to manufacture, and has a small number of parts for assembling operation. It is an object of the present invention to provide a shift lever structure for an automatic transmission that is easy to operate.

[0009]

[Means for Solving the Problems]

 A shift lever structure of an automatic transmission according to claim 1 of the present invention is a structure of a shift lever erected on a shift operation device of an automatic transmission of an automobile, and the shift lever is rotatable about a horizontal axis. It is composed of a cylindrical outer cylinder axially supported on the outer cylinder and a push rod fitted inside the outer cylinder. A guide hole is formed in the lower portion of the outer cylinder to extend in the vertical direction. A cam to be pressed is provided at the upper end of the rod, and a guide pin holding portion for holding a guide pin orthogonal to the push rod is formed at the lower end, and the guide pin held by this guide pin holding portion is In the shift lever structure of the automatic transmission, which is slidably fitted in the guide hole and has a biasing means for pushing the push rod upward at the bottom of the outer cylinder, the cam and push rod De and the guide pin holding portion is characterized in that it is formed integrally by synthetic resin.

A shift lever structure for an automatic transmission according to a second aspect of the present invention is the shift lever structure for an automatic transmission according to the first aspect, wherein a spring is radially provided in a body portion of the push rod. A center spring which is formed and whose outer peripheral end is in pressure contact with the inner peripheral surface of the outer cylinder is attached.

A shift lever structure for an automatic transmission according to a third aspect of the present invention is the shift lever structure for an automatic transmission according to the first aspect, wherein a fitting hole is formed in a bottom surface of the guide pin holding portion. The guide pin support is provided with a guide pin in the horizontal direction on its body, and a fitting protrusion that fits in the fitting hole is provided on the upper portion. The fitting protrusion fits in the fitting hole. The guide pin is configured to be held in the guide pin holding portion by being inserted.

A shift lever structure for an automatic transmission according to a fourth aspect of the present invention is the shift lever structure for an automatic transmission according to the first aspect, wherein a guide pin is fitted and locked in the guide pin holding portion. Locking hole is formed, an elastic piece integral with the guide pin holding portion having elasticity is provided on the inner wall surface of the locking hole, and a locking projection is provided on the guide pin so as to project the guide pin. It is characterized in that the locking projection of the guide pin is configured to engage with the guide pin holding portion in a state of being fitted in the locking hole.

[0013]

[Action]

 According to the shift lever structure of the automatic transmission described in claim 1, the cam, the push rod, and the guide pin holding portion are integrally formed of synthetic resin, and therefore, compared with the conventional metal one. It is lightweight and easy to handle, and the manufacturing cost is lower than that of conventional cold forging using metal as a raw material. Further, since the cam is integrally formed on the top of the rod from the beginning, the number of parts is reduced and the assembling operation becomes easy.

According to the shift lever structure of the automatic transmission of the second aspect, the center of the push rod body is formed with a spring in the radial direction, and the outer peripheral end of the spring is pressed against the inner peripheral surface of the outer cylinder. Since a spring is attached, the push rod is restricted by this center spring when it moves up and down, and lateral shake is effectively prevented.As a result, the poor operability of the push rod due to the above lateral shake is eliminated, and the push rod moves smoothly. The push rod can be moved up and down.

According to the shift lever structure of the automatic transmission of the third aspect, a fitting hole is formed in the bottom surface of the guide pin holding portion, and the guide pin support body is horizontally aligned with the body portion thereof. Is provided with a guide pin, and a fitting protrusion that fits into the fitting hole is provided on the upper portion, and the guide pin is held by the guide pin holding portion by fitting the fitting protrusion into the fitting hole. Since it is configured so that the guide pin is inserted into the outer cylinder and the guide pin is attached, the fitting protrusion of the guide pin support body is pushed so that the fitting hole of the guide pin holding portion is fitted. By pressing the rod downward, the guide pin is attached to the guide pin holding portion.

According to the shift lever structure of the automatic transmission of the fourth aspect, the guide pin holding portion is provided with the locking hole for fitting and locking the guide pin, and the inner wall surface of the locking hole. An elastic piece integrated with the elastic guide pin holding portion is provided on the guide pin, and a locking projection is provided on the guide pin.When the guide pin is fitted into the locking hole, the locking projection of the guide pin is provided. Since the guide pin is configured to engage with the guide pin holding part, the guide pin can be simply inserted into the locking hole of the guide pin holding part without press-fitting the guide pin as in the past. The guide pin is held by the guide pin holding portion while being pressed against the piece and prevented from coming off.

[0017]

【Example】

 FIG. 1 is a perspective view showing an example of a shift lever structure of an automatic transmission according to the present invention. The shift lever 2 according to the present invention is rotatably provided around an axis of a boss 3 arranged on a lever support portion 4 provided on a base plate P of the gear shift operating device shown in FIG. As shown in FIG. 1, the shift lever 2 is provided with an outer cylinder 21 which is rotatably supported via a boss 3 around a bolt B as a horizontal shaft provided on the lever support portion 4. The push rod 22 is inserted into the outer cylinder 21 and is basically configured. A guide hole extending in the vertical direction is formed in the lower portion of the outer cylinder 21. Further, a coil spring 27 as an urging means for pushing the push rod 22 upward is installed in the bottom of the outer cylinder 21.

A flat plate-shaped cam 23 is integrally provided on the push rod 22 at the upper end portion of the push rod 22 so as to extend in the vertical direction, and the outer diameter is substantially the inner diameter of the outer cylinder 21 at the lower end portion. Is provided with a guide pin holding portion 24. A fitting hole 24a is formed on the bottom surface of the guide pin holding portion 24 in an upward direction.

The push rod 22 as described above is integrally formed of synthetic resin. The synthetic resin is not particularly limited as long as it has a mechanically appropriate strength and is not particularly limited, but general synthetic resins such as polypropylene, polyvinyl chloride, acrylonitrile butadiene styrene, and polyethylene terephthalate are preferable. Further, engineering plastics such as polysulfone, polyether sulfone, polyamideimide, and polytetrafluoroethylene are more preferably used. Such a molten raw material of synthetic resin is injected into a predetermined mold to integrally manufacture the push rod.

On the other hand, the guide pin 25 is attached to a columnar guide pin support 28. The guide pin support 28 is provided with a fitting protrusion 28a that fits into a fitting hole 24a formed in the guide pin holding portion 24, and is provided with a side portion in a horizontal direction. A locking hole 28b penetrating therethrough is bored, and by fitting the fitting protrusion 28a into the fitting hole 24a, the guide pin support body 28 is joined to the guide pin holding portion 24 and the guide pin 25 is formed. The guide pin is attached to the guide pin support by press-fitting into the locking hole 28b.

In order to mount the center spring 5 on the push rod 22, the center spring 5 is provided with a cut 52, and the center spring 5 pushes and opens the cut 52 to push the push rod 22. Be attached to.

A center spring 5 is fitted in the same portion of the push rod 22 as described above. The center spring 5 is a center holding means in the outer cylinder 21 of the push rod 22 having a donut shape in a plan view, in which a fitting hole for fitting the push rod 22 is formed in the center, and the meat of the donut is formed. This portion is formed by a leaf spring 51 that projects radially from the center. The outer diameter of the circle formed by the leaf spring 51 is set to be slightly smaller than the inner diameter of the outer cylinder 21. Therefore, when the push rod 22 to which the center spring 5 is attached is fitted in the outer cylinder 21, the push rod 22 is not laterally swung in the outer cylinder 21 by the center spring 5 and is always in the central portion. Will be located in

FIG. 2 is an enlarged perspective view showing an example of the guide pin holding portion 24 and a guide pin support 28 corresponding to the holding portion 24, and FIG. 3 corresponds to another example of the guide pin holding portion 24 and the guide pin holding portion 24. It is a perspective view which shows the guide pin support body 28. First, in the example shown in FIG. 2, the fitting protrusion 28a provided on the guide pin support 28 is formed in a columnar shape, and the inner peripheral surface of the fitting hole 24a corresponding to the fitting protrusion 28a has a vertical shape. A plurality of locking strips 24b extending in the direction are formed. The diameter of the circle formed by connecting the tips of the plurality of locking strips 24b is set to be slightly smaller than the diameter of the circle of the fitting projection. Therefore, when the fitting protrusion 28a is fitted into the locking hole 24a, the fitting protrusion 28a is reliably held by the restoring force of the pressed locking ridge 24b, and the guide pin support 28 Is firmly connected to the guide pin holding portion 24.

Next, in the example shown in FIG. 3, a plurality of locking claws 28c are provided on the outer peripheral edge of the cylindrical fitting protrusion 28a provided on the guide pin support 28. On the other hand, on the inner peripheral surface of the fitting hole 24a provided at the lower end of the guide pin holding portion 24, a portion corresponding to the above-mentioned locking claw 28c is provided with a locking hole 24c. Therefore, when the fitting projection 28a is fitted into the fitting hole 24a to join the push rod 22 and the guide pin support 28, the locking hole 24c provided in the fitting projection 28a is bored in the fitting hole 24a. The guide pin support 28 and the push rod 22 are securely coupled to each other by being fitted and locked in the locked hole 24c.

FIG. 4 is a partially enlarged perspective view showing a guide pin holding portion 24 of another example, and FIG. 5 is a side sectional view thereof. In the case of this example, a rectangular locking hole 24d is provided in the guide pin holding portion 24 itself which is integral with the push rod 22. An elastic piece 24e is provided at the bottom of the locking hole 24d. The elastic piece 24e is integrally formed with the guide pin holding portion 24 so as to project obliquely upward from the center of the bottom surface of the locking hole 24d toward the opening of the locking hole 24d in a beard-like shape in side view. This beard-shaped elastic piece 24e is elastic because it is a thin plate made of synthetic resin that is integral with the guide pin holding portion 24, and it has the elasticity of a leaf spring that is biased upward when pressed downward. It is supposed to fulfill its role.

On the other hand, the guide pin 25a fitted in the locking hole 24d has a prismatic shape corresponding to the shape of the locking hole 24d, and a pair of left and right projecting claws 25b are provided on the bottom surface thereof. The distance between the pair of projecting claws 25b is set to be slightly longer than the diameter of the guide pin holding portion 24, and the projecting claws 25b are formed with a downward slope in a direction away from each other. .

Therefore, when the guide pin 25a is fitted into the locking hole 24d, the tip of the elastic piece 24e provided at the bottom of the locking hole 24d is pushed downward due to the inclination of the protruding claw 25b. The guide pin 25a can be easily inserted into the locking hole 24d, and once inserted, the tip portions of the pair of left and right elastic pieces 24e are urged upward as shown in FIG. The bottom surface of the pin 25a is pressed and stopped by the protruding claw 25b of the guide pin 25a, so that the guide pin 25a is prevented from coming out of the locking hole 24d.

Since the shift lever structure of the automatic transmission according to the present invention is constructed as described above, in the case of the embodiment shown in FIGS. 1 to 3, first, the coil bar 27 is formed on the inner bottom portion of the outer cylinder 21. Is mounted, and the guide pin support 28 is inserted from above. Then, the guide pin 25 is press-fitted into the locking hole 28b of the guide pin support 28 inserted in the outer cylinder 21 via the guide hole 26 formed in the lower portion of the outer cylinder 21. After that, the push rod 22 having the center spring 5 mounted therein is inserted into the outer cylinder 21 from above, and the fitting hole 24a provided in the guide pin holding portion 24 is inserted into the fitting hole 24a of the guide pin support body 28 previously inserted. By fitting the push rod 22 in the fitting protrusion 28a, the mounting of the push rod 22 into the outer cylinder 21 is completed.

When the guide pin holding portion 24 is of the system shown in FIGS. 4 and 5, the guide pin holding portion 24 itself has the locking hole 24d, so that the guide pin support body 28 is removed in advance. The push rod 22 is directly inserted into the outer cylinder 21 without being fitted into the cylinder 21, and the guide pin 25a is inserted into the locking hole 24d through the guide hole 26 of the outer cylinder 21. Since the installation of the gear into the outer cylinder 21 is completed, the step of assembling the gear shift operating device can be omitted by one step, which is convenient for streamlining the assembling work.

As described in detail above, the shift lever structure of the present invention is based on the push rod 22 integrally manufactured by the synthetic resin, so that the push rod 22 is easy and inexpensive to manufacture. In addition to simplifying the work of assembling the push rod 22 to the outer cylinder 21, it also contributes to the reduction of the number of parts and rationalizes the work of assembling the shift operation device of the automatic transmission installed in the automobile as a whole. Can contribute to a large amount.

[0031]

[Effect of device]

 As described above, in the shift lever structure of the automatic transmission of the present invention, since the push rod is integrally formed of synthetic resin, it is lighter in weight and easier to handle than the conventional metal one. In addition, the manufacturing cost is lower than the conventional manufacturing by cold forging using a metal as a raw material. Further, since the cam is integrally formed on the top of the rod from the beginning, the number of parts is reduced and the assembling operation becomes easy.

If a center spring is formed on the body of the push rod in the radial direction and its outer peripheral end is in pressure contact with the inner peripheral surface of the outer cylinder, the push rod is restricted by this center spring during its vertical movement. As a result, lateral shake is effectively prevented, and as a result, the poor operability of the push rod due to the lateral shake is eliminated, and the push rod can be smoothly moved up and down, which is convenient.

A fitting hole is formed in the bottom surface of the guide pin holding portion, a guide pin is provided in the body of the guide pin support member in the horizontal direction, and a fitting protrusion that fits in the fitting hole is provided on the upper portion. If the guide pin is configured to be held by the guide pin holding portion by providing the raised portion and fitting the fitting protrusion into the fitting hole, the guide pin is pre-inserted in the outer cylinder and the guide pin is attached. The guide pin is attached to the guide pin holding portion by pressing the push rod downward so that the fitting hole of the guide pin holding portion fits into the fitting protrusion of the guide pin support body in the locked state. It becomes a state.

A locking hole for fitting and locking the guide pin is bored in the guide pin holding portion, and an elastic piece integral with the elastic guide pin holding portion is provided on the inner wall surface of the locking hole, If the guide protrusion is provided on the guide pin and the guide pin is configured to engage with the guide pin holding part when the guide pin is fitted in the lock hole, By simply inserting the guide pin into the locking hole of the guide pin holding part without pressing the guide pin, the guide pin is pressed against the elastic piece and prevented from coming off, and the guide pin is inserted into the guide pin holding part. Since it is held, it is convenient to install the guide pin easily.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an example of a shift lever structure of an automatic transmission according to the present invention.

FIG. 2 is an enlarged perspective view showing an example of a guide pin holder and a guide pin support member corresponding to the holder.

FIG. 3 is an enlarged perspective view showing another example of a guide pin holder and a guide pin support member corresponding to the holder.

FIG. 4 is an enlarged perspective view showing still another example of the guide pin holding portion.

5 is a sectional view of the side view of FIG. 4, showing a state in which a guide pin is mounted.

FIG. 6 is a partially cutaway perspective view showing an example of a shift lever structure of a conventional automatic transmission.

[Explanation of symbols]

 1 gear shift operation device 2 shift lever 21 outer cylinder 22 push rod 23 cam 24 guide pin holding part 24a fitting hole 24b locking strips 24c, 24d locking hole 24e elastic piece 25, 25a guide pin 25b projecting claw 26 guide hole 27 coil spring 28 Guide Pin Support 28a Fitting Protrusion 28b Locking Hole 28c Locking Claw 3 Boss 4 Lever Support 5 Center Spring 51 Leaf Spring 52 Cut P Base Plate T Operation Plate

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Creator Michio Sumida 1-14 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Delta Industrial Co., Ltd. (72) Creator Kazuhiko Kawasaki 1-14 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Kogyo Co., Ltd. (72) Inventor Takushi Ushimoto 1-14 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Delta Kogyo Co., Ltd. (72) Takuya Shimokawa 1-14 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Delta Industrial Co., Ltd. In-house (72) Creator Miyazaki Mamoru 3-1, Shinchi Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Co., Ltd. (72) Inventor Yuichiro Matsumoto 3-1-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture (72) Devised Person Hisashi Watanabe 3-1, Shinchi Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Co., Ltd. (72) Inventor Kouki Makino 3-1-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Corporation Within the company

Claims (4)

[Scope of utility model registration request] 1. A structure of a shift lever erected on a gear shift operation device of an automatic transmission of an automobile, the shift lever comprising a cylindrical outer cylinder rotatably supported around a horizontal axis, A guide rod extending vertically is formed in the lower portion of the outer cylinder, and a push cam is provided at the upper end of the push rod. A guide pin holding portion for holding a guide pin orthogonal to the push rod is formed at the lower end portion, and the guide pin held by the guide pin holding portion is slidably fitted in the guide hole and In a shift lever structure of an automatic transmission in which a biasing means for pushing a push rod upward is installed in a bottom portion of a cylinder, the cam, push rod and guide pin holding portion are integrally made of synthetic resin. A shift lever structure for an automatic transmission characterized by being formed. 2. A center spring is attached to a body portion of the push rod in a radial direction, and a center spring is attached to the outer peripheral end of the spring to press-contact the inner peripheral surface of the outer cylinder. The shift lever structure of the automatic transmission described. 3. A fitting hole is formed in the bottom surface of the guide pin holding portion, a guide pin is provided in the body portion of the guide pin support member in the horizontal direction, and a fitting hole is provided in the upper portion of the guide hole. A fitting protrusion for fitting is provided, and the guide pin is held in the guide pin holding portion by fitting the fitting protrusion into the fitting hole. Item 2. A shift lever structure for an automatic transmission according to Item 1. 4. The guide pin holding portion is formed with a locking hole for fitting and locking the guide pin, and an elastic piece integrated with the elastic guide pin holding portion is formed on an inner wall surface of the locking hole. The guide pin is provided with a locking projection, and the locking projection of the guide pin engages with the guide pin holding portion in a state where the guide pin is fitted in the locking hole. The shift lever structure for an automatic transmission according to claim 1, wherein: