JP2000159072A - Mounting structure of parking lever - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of a parking lever capable of using a hole in a pressure fitting tool as an oil injection port. SOLUTION: A parking lever 6 is arranged capable of tilting centering on a fulcrum shaft 5 inside the case 1 of an automatic transmission, wherein the fulcrum shaft 5 is fitted by pressure and fixed by inserting a tool from a threaded hole 1a opened in the oversurface of the case 1, and an oil filler plug 8 is fitted in the hole 1a in such a way as capable of being removed at the time of oil injection, and the bottom of the plug 8 is confronts the top of the shaft 5 so that it is prevented from slipping off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parking lever mounting structure constituting a parking mechanism of an automatic transmission.

[0002]

2. Description of the Related Art Conventionally, in order to tiltably fix a parking lever constituting a parking mechanism of an automatic transmission, a fulcrum shaft is moved from an opening provided at an end of the case to a thick portion of the case. Pressing structures are known. However, in the layout of the automatic transmission, when the thick portion for press-fitting the fulcrum shaft is opposed to the inner peripheral surface of the case, the fulcrum shaft cannot be assembled from the opening at the end of the case. Therefore, an insertion hole for inserting a press-fitting tool is necessary, which increases the number of processing steps, and requires a member for sealing the insertion hole, thereby increasing the number of parts. there were.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and a first gist of the invention is to dispose an automatic transmission such that the automatic transmission can be tilted about a fulcrum shaft. In the parking lever provided, the fulcrum shaft is press-fitted and fixed by inserting a press-fitting tool through a screw hole opened on the upper surface of the case, and an oil filler plug is detachably inserted into the screw hole at the time of oil injection. Are screwed, and the lower end of the oil filler plug is provided at the upper end of the fulcrum shaft to prevent the fulcrum shaft from being removed. A second gist of the present invention is a parking lever that is disposed in a case of an automatic transmission so as to be tiltable about a fulcrum shaft, wherein the fulcrum shaft is screwed from outside into a screw hole formed in the case. And the fulcrum shaft is inserted and fixed in a predetermined shaft hole by tightening the blind bolt.

[0004]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a main part of the park mechanism of the automatic transmission, and FIG. 2 is a schematic plan view of the park mechanism shown in FIG.

[0005] In the figure, a manual shaft 2 which is turned via a cable when an operation lever provided in a vehicle cabin is operated is rotatably provided, and a pin 3 is attached to the manual shaft 2. The first lever 4 is externally fitted with the boss portion 4a fixed thereto, and the first lever 4 has a slot-shaped groove 4b formed therein. A second lever 6 is provided in parallel with the case 1 of the automatic transmission.
A boss 6a is rotatably fitted to the fulcrum shaft 5 press-fitted into the second lever 6, and a pin shaft 7 is fixedly provided on the second lever 6, and the pin shaft 7 is provided in the groove of the first lever 4. The second lever 6 is connected to the first lever 4 by being inserted into the hole 4b.

That is, as shown in an enlarged sectional view of a main part in FIG. 3, when the fulcrum shaft 5 is pressed into the case 1, a screw hole 1a is formed on the upper surface side of the case 1, and the screw hole 1a is formed.
The press-fitting tool is inserted from the outside of the shaft, the fulcrum shaft 5 is press-fitted and fixed by the press-fitting tool, and the boss 6a of the second lever 6 is fitted around the fulcrum shaft 5. Is removed, an oil filler plug 8 is screwed into the screw hole 1a from outside.
When the oil filler plug 8 is tightened into the screw hole 1a, the lower end of the oil filler plug 8 is
The oil filler plug 8 prevents the fulcrum shaft 5 from being pulled out. The lower end of the oil filler plug 8 is larger than the boss 6 a of the second lever 6. The oil filler plug 8 prevents the boss 6a of the second lever 6 from being pulled out. The oil filler plug 8 can be loosened and removed as necessary, and oil can be injected into the case 1 of the automatic transmission from the screw hole 1a using the screw hole 1a. The hole 1a can be used.

As shown in an enlarged view of a main part of FIG. 4, a hole 6b is formed at an end of the second lever 6 opposite to the pin shaft 7, and a shaft of the joint member 9 is formed in the hole 6b. Part 9a
Is inserted, the joint member 9 is connected to the second lever 6 by a retaining portion 9b protruding from the shaft portion 9a, and a hole 9c is formed in the joint member 9,
The rod 10 is movably inserted into the hole 9c, and the caulking portion 11 protruding from the outer periphery of the rod 10 abuts on the joint member 9 so that the rod 10 is prevented from moving to the right in the drawing. It is configured. Also, rod 1
A spring ring 12 is fitted on the right end side of the rod 10 via a split pin 13, and a spring 14 is provided on the outer periphery of the rod 10 between the spring ring 12 and the joint member 9. A cam surface 10a is integrally formed in a tapered shape at the other end of the rod 10, and a large-diameter portion 10b is formed at the tip of the cam surface 10a. The cam surface 10a and the large-diameter portion 10b are integrally formed in a straight line with the rod 10, and the rod 10 is configured to be rotatable in the hole 9c of the joint member 9.

As shown in FIG. 2, the cam surface 10a of the rod 10 is inserted and disposed in a recess 16 which is formed obliquely through a fixed shaft 15 fixed to the case 1. The bottom side of the concave portion 16 formed in a concave shape on the shaft 15 forms an inclined surface 16a as shown in the schematic diagram of FIG. 5, so that the cam surface 10a can be lifted by being guided along the inclined surface 16a. Normally, the cam surface 10a is disposed in the recess 16 in a state of sinking as shown in an enlarged sectional view of FIG. This fixed shaft 15
One end of a parking pole 17 is arranged in contact with the outer periphery of the concave portion 16 of the recess 16, and the parking pole 17 is swingably provided around a pole shaft 18, and a claw 17 a is integrally formed on the other end. The pawl 17a is arranged so as to mesh with the teeth on the outer periphery of the parking gear 19.

Pole shaft 1 of parking pole 17
A return spring 20 is wound around an outer periphery of the return spring 8, and an end 20 a of the return spring 20 is hooked on a side surface of the parking pole 17, as shown in an enlarged sectional view of FIG. . In order to prevent the return spring 20 from jumping out, the return spring 2
A pressing plate 22 is fixed to the upper surface of the bracket 0 by bolts 21, and the lower surface of the pressing plate 22 is arranged in a state of contacting the upper surface of the return spring 20. The press plate 22 is stamped and formed by a press. When the press plate 22 is stamped and formed by a press, an inclined rounded sagging surface 22a is formed on a peripheral side thereof by a press die. The holding plate 22 is arranged so that the sagging surface 22a is on the lower side in FIG. 7, that is, the side in contact with the return spring 20, and the sagging surface 22a is inclined in a round shape. Does not come into contact with the return spring 20, so that the return spring 20 is slidably contacted with the peripheral edge of the holding plate 22, so that the return spring 20 is well prevented from being damaged. In addition, if the sagging surface 22a formed at the time of press molding is brought into contact with the return spring 20 with the lower surface facing downward, there is no need to separately perform chamfering on the periphery of the holding plate 22, thereby reducing costs. Thus, the return spring 20 can be prevented from being damaged satisfactorily.

In such a configuration, when the driver operates the operation lever in the vehicle to the parking side (P range), the manual shaft 2 rotates via a cable, whereby the first lever 4 moves the boss portion 4a. Rotating around the center, the second lever 6 also rotates in conjunction with the pin shaft 7 inserted into the slot 4b, and the joint member 9 is rotated by the rotation of the second lever 6, as shown in FIG. To compress the spring 14, the rod 10 moves to the right side in the figure, and the cam surface 10a moves to the concave portion 1 as shown in FIG.
6 rises along the inclined surface 16a, whereby the cam surface 1
0a pushes up one end side of the parking pole 17, whereby the claw 17a on the other end side of the parking pole 17 moves downward and meshes with the teeth on the outer periphery of the parking gear 19, and the cam surface 10a The parking pole 17 can be smoothly moved up along the inclined surface 16a to operate the parking pole 17 satisfactorily.

When the driver operates the P range (parking side) while the vehicle is running due to a malfunction, the pawl 17a of the parking pawl 17 comes into contact with the outer periphery of the tooth portion of the parking gear 19, and the parking pawl 17 is driven. The other end of the rod 17 is struck, but the cam surface 10a of the rod 10 sinks into the recess 16 due to the compression of the spring 14, so that the parking pole 17 is not hit against the cam surface 10a, Is fixed shaft 1
5 is abutted against the outer periphery of the cam surface 5 and the cam surface 10a is prevented from being damaged.

When the parking range is selected during the stop, the pawl 17a of the parking pawl 17 abuts on the outer periphery of the tooth portion of the parking gear 19 and does not mesh well, so that the spring 14 contracts as shown in FIG. The rotation of the first lever 4 and the second lever 6 causes the joint member 9 to move to the right in the drawing first, and thereafter, when the teeth of the parking gear 19 move on a slope, vibration, or the like, the rod 10 Is moved to the right,
The caulking portion 11 comes into contact with the joint member 9 so that a favorable parking state can be secured.

In this embodiment, since the rod 10, the cam surface 10a and the large-diameter portion 10b are integrally formed in a straight line, the rod 10 is formed in the hole 9c of the joint member 9.
Even if the rod 10 rotates and changes its direction, it does not come into contact with other parts and can maintain a good function, like a rod formed by bending in a conventional crank shape, There is no danger of abutting on components that are located nearby.

In FIG. 3, the fulcrum shaft 5 for supporting the second lever 6 is illustrated as being press-fitted into the case 1, but as shown in an enlarged sectional view in FIG.
b, the fulcrum shaft 5 is formed integrally with the lower end of the blind bolt 23, and the blind bolt 23 is screwed into the screw hole 1a from the outside. The shaft 5 can also be configured to be inserted into the shaft hole 1b. When the blind bolt 23 is tightened, the boss portion 6a of the second lever 6 is fitted around the fulcrum shaft 5 so that the second lever can be satisfactorily formed. In FIG. 8, since the fulcrum shaft 5 is fixed to the shaft hole 1b by tightening the blind bolt 23 into the screw hole 1a, a separate press-fitting tool as shown in FIG. It is not necessary to insert the fulcrum shaft 5 from the hole 1a and press-fit the fulcrum shaft 5, thereby facilitating the assembly. In addition, the fulcrum shaft 5 can be integrally formed at the tip of the blind bolt 23 to reduce the number of parts. Become.

FIG. 9 shows a modification of FIG. 8, and in order to prevent the boss 6a of the second lever 6 from being worn.
Further, a collar 24 is fitted around the fulcrum shaft 5. In FIG. 9 as well, the fulcrum shaft 5 can be satisfactorily inserted into the predetermined shaft hole 1b by screwing the blind bolt 23 into the screw hole 1a from the outside and tightening the screw. The number of parts can be reduced.

[0016]

According to the present invention, there is provided a parking lever disposed in a case of an automatic transmission so as to be tiltable about a fulcrum shaft, wherein the fulcrum shaft is press-fitted from a screw hole opened on an upper surface of the case. A tool is inserted and press-fitted and fixed, and an oil filler plug is removably screwed into the screw hole at the time of oil injection, and the lower end of the oil filler plug faces the upper end of the fulcrum shaft, and the fulcrum shaft is connected to the oil filler plug. By using a screw hole for inserting a press-fitting tool for press-fitting the fulcrum shaft, it is used as an oil filler port.The screw hole is covered with an oil filler plug, and the fulcrum is fixed with an oil filler plug. It can also serve as a stopper for the shaft, and has the effect of reducing the number of openings and the number of processing steps and the number of parts.

[0017] In the parking lever provided in the case of the automatic transmission so as to be tiltable about a fulcrum shaft, the fulcrum shaft may be screwed from outside into a screw hole formed in the case. The fulcrum shaft is integrally formed at the tip of the blind bolt, and the fulcrum shaft is inserted and fixed in a predetermined shaft hole by tightening the blind bolt. The fulcrum shaft can be inserted and fixed in a predetermined insertion hole by screwing the blind bolt into the screw hole, and the number of parts can be reduced, so that the parking lever can be attached favorably. Has an effect.

[Brief description of the drawings]

FIG. 1 is a side view illustrating a configuration of a main part of a parking mechanism of an automatic transmission.

FIG. 2 is a schematic plan view of FIG. 1;

FIG. 3 is an enlarged cross-sectional configuration diagram showing a mounting structure of a fulcrum shaft that supports a second lever.

FIG. 4 is an enlarged configuration diagram showing a connection structure between a second lever and a rod.

FIG. 5 is a schematic configuration diagram illustrating an arrangement relationship between a cam surface, a concave portion, and a parking pole.

FIG. 6 is an enlarged cross-sectional configuration diagram of the right side surface of FIG. 5;

FIG. 7 is an enlarged cross-sectional view of a main part in a state where a return spring provided on a parking pole is pressed by a pressing plate.

FIG. 8 is an enlarged cross-sectional view of a configuration in which a fulcrum shaft is formed integrally with a blind bolt to support a second lever.

9 is an enlarged sectional view showing a state in which a collar is fitted around the fulcrum shaft of FIG. 8;

[Explanation of symbols]

 Reference Signs List 1 case 1a screw hole 1b shaft hole 2 manual shaft 4 first lever 4a boss 4b slot 5 fulcrum 6 second lever 6a boss 6b hole 7 pin shaft 8 oil filler plug 9 joint member 9a shaft 9b retaining portion 9c Hole 10 rod 10a cam surface 10b large diameter portion 11 caulking portion 14 spring 15 fixed shaft 16 concave portion 16a inclined surface 17 parking pole 17a claw 18 pole shaft 19 parking gear 20 return spring 21 bolt 22 holding plate 22a sagging surface 23 blind bolt 24 collar

Continuation of the front page (72) Inventor Tadayuki Yamashita 1 of 700, Kamoda, Imaizumi, Fuji-shi, Shizuoka Prefecture F-term in JATCO Co., Ltd. (reference)

Claims (2)

[Claims] 1. A parking lever provided in a case of an automatic transmission so as to be tiltable about a fulcrum shaft,
The fulcrum shaft is press-fitted and fixed by inserting a press-fitting tool from a screw hole opened on the upper surface of the case, and an oil filler plug is removably screwed into the screw hole at the time of oil injection. A parking lever mounting structure, wherein a lower end of the filler plug is provided at an upper end of the fulcrum shaft to prevent the fulcrum shaft from being removed. 2. A parking lever disposed in a case of an automatic transmission so as to be tiltable about a fulcrum shaft,
The fulcrum shaft is formed integrally with the tip of a blind bolt screwed from the outside into a screw hole formed in the case, and the fulcrum shaft is inserted into a predetermined shaft hole by tightening the blind bolt. A parking lever mounting structure characterized in that it is configured to be fixed.