JPH0811685A - Fixing device for parking lock pole sleeve - Google Patents

Abstract

PURPOSE:To increase the positional accuracy of a parking lock pole sleeve and facilitate working by fixing a lock plate to a case by holding the shoulder part of the parking lock pole sleeve with a holding part. CONSTITUTION:A lock plate 3 is fixed to a case 1 by holding the shoulder part of a parking lock pole sleeve 2 by a fixing means to so that the shoulder part of the parking lock pole sleeve 2 is 2 is held by the holding part 31 of the lock plate 3 in axial direction far preventing removal. Also the engaged part 32 of the lock plate 3 is engaged with an engagement part formed in the outer wall of the parking lock pole sleeve 2 for prevention of rotation. Thus the positional accuracy of the parking lock pole sleeve 2 is increased, and working is facilitated to lower part cost and working cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parking lock pole sleeve which is inserted into a hole formed in a case of an automatic transmission while a cam connected to a parking lever via a rod slides. A lock plate having a sandwiching portion for sandwiching the shoulder portion in the axial direction and an engaging portion for engaging with an engaging portion formed on the outer peripheral wall is secured to the case by a securing means. The present invention relates to a fixing device for a parking lock pole sleeve that improves the positional accuracy of the sleeve and reduces the component cost and the processing cost.

[0002]

2. Description of the Related Art As shown in FIGS. 5 and 6, a conventional parking lock pole sleeve fixing device has a radial cutout K in a parking lock pole sleeve S and a case C.
Is formed and the pin P is inserted for positioning, and an annular groove G is provided on the outer peripheral wall of the parking lock pole sleeve S to prevent the slippage into the case C by inserting a snap ring R. In addition, a cover V having a two-step recess that abuts the shaft end of the parking lock pole sleeve S is fixed to the outer wall of the case C to prevent the parking lock pole sleeve S from coming out of the case C. It was a thing.

[0003]

In the conventional fixing device for the parking lock pole sleeve described above, the parking lock pole sleeve S and the case C are formed with the radial cutouts K and the pins P are inserted thereinto. An annular groove G is provided on the outer peripheral wall of S to provide a snap ring R
Since the cover V is fixed to the outer wall of the case C, the cover V having two-step recesses that come into contact with the shaft end of the parking lock pole sleeve S is fixed. It is difficult to increase the precision, and there is a problem that the processing cost and the component cost are increased.

Further, in the conventional fixing device for the parking lock pole sleeve, the parking lock pole sleeve S and the case C need to be machined with radial notches K.
In addition, since it is necessary to make a hole in the two-step concave portion that abuts the shaft end of the parking lock pole sleeve S with respect to the cover V, there is a problem that the processing is complicated.

Therefore, the inventor of the present invention fixed a lock plate having a sandwiching portion for axially sandwiching the shoulder portion of the parking lock pole sleeve and an engaging portion for engaging with the engaging portion formed on the outer peripheral wall. Focusing on the technical idea of the present invention that it is fixed to the case by means, and as a result of further research and development, as a result, the fixing structure is simplified and the positional accuracy of the parking lock pole sleeve is improved, and processing is facilitated. The present invention has been achieved which achieves the objective of reducing costs and processing costs.

[0006]

In a fixing device for a parking lock pole sleeve according to the present invention, a cam communicating with a parking lever via a rod slides, and a hole formed in a case of an automatic transmission. A parking plate that has a shoulder portion of a parking lock pole sleeve that is inserted in the axial direction, and a locking plate that includes an engaging portion that engages with an engaging portion formed on an outer peripheral wall; And a fastening means for fastening the shoulder portion of the parking lock pole sleeve to the case by the holding portion.

[0007]

In the parking lock pole sleeve fixing device of the present invention having the above-mentioned structure, the lock plate is fixed to the case by sandwiching the shoulder portion of the parking lock pole sleeve by the fixing means.
The clamping portion of the lock plate axially clamps the shoulder portion of the parking lock pole sleeve to prevent the parking lock pole sleeve from coming off, and the engaging portion of the lock plate causes the outer peripheral wall of the parking lock pole sleeve. It engages with the engaging portion formed in the above to prevent rotation.

[0008]

According to the fixing device of the parking lock pole sleeve of the present invention which has the above-mentioned operation, the pinching portion of the lock plate fixed to the case by the fixing means pivots the shoulder portion of the parking lock pole sleeve. Since the engaging portion engages with the engaging portion formed on the outer peripheral wall of the parking lock pole sleeve, the fixing structure is simple and This has the effect of improving the positional accuracy and facilitating the processing to reduce the component cost and the processing cost.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) A parking lock pole sleeve fixing device of the first embodiment is inserted in a hole formed in a case 1 of an automatic transmission as shown in FIGS. 1 and 2. A notch 21 formed by linearly cutting a part of the outer peripheral wall of the shoulder portion of the parking lock pole sleeve 2, a pinching part 31 for axially sandwiching the horizontal plane 211 of the notch, and a straight line perpendicular to the notch 21. Linear engagement part 3 that engages with the wall 212
Lock plate 3 configured by a rectangular plate member configured by 2 and the linear engagement portion 32 configured by one side of the rectangular plate member of the lock plate 3.
And a substantially rectangular recess 4 formed in the case 1 having a width substantially equal to the width up to the facing portion formed by the opposite side 33 parallel thereto, and the lock plate 3 is inserted into the substantially rectangular recess 4. Then, the horizontal surface 211 of the cutout portion 21 of the parking lock pole sleeve 2 is held by the holding portion 31 of the lock plate 3, and the straight vertical wall 2 of the cutout portion 21 is held by the straight line engaging portion 32.
12 to engage the lock plate 3 with the case 1
It is composed of a bolt 5 fixed to.

In the case 1, P, R, N, D,
A parking lever 11 in which engaging grooves corresponding to 6 positions of 2 and L are formed in a circumferential direction is provided, and a cam 13 communicating with the parking lever 11 via a rod 12 according to the swing of the parking lever 11 is provided. The parking lock pole sleeve 2 is slidable inside.

A hole portion is formed which penetrates a portion of the end portion of the case 1 in the axial direction relatively close to the outer peripheral portion of the lid portion, and the portion near the outer side prevents the parking lock pole sleeve 2 from coming out. The parking lock pole sleeve 2 is a stepped hole portion having a shoulder portion 15 formed therein for forming the eccentric substantially S-shaped passage in which the cam 13 slides. It is inserted in contact with 15.

As shown in FIG. 2, a notch 21 is formed by cutting out a portion of the outer peripheral wall of the shoulder portion of the parking lock pole sleeve 2 which protrudes into the case 1, as shown in FIG.
Is formed, and a flat arcuate horizontal surface 211 and a straight vertical straight wall 212 are formed.

The inner wall surface of the case 1 facing the cutout portion 21 of the parking lock pole sleeve 2 has a side 41 slightly longer than the length of the straight vertical wall 212 of the cutout portion 21, and two sides 42 shorter than that. , 43, 2
A chamfered substantially rectangular recess 4 is formed at each corner.

The lock plate 3 has a sandwiching portion 31 formed on the lower surface of one end for axially sandwiching the horizontal plane 211 of the notch portion of the parking lock pole sleeve 2 and a straight vertical wall 212 of the notch portion 21. Has the same length as the linear engagement portion 32 formed by the vertical wall at one end that engages with, and has a width substantially the same as the width between the linear vertical wall 212 and the opposing wall of the rectangular concave portion 4. It is composed of a rectangular plate member.

That is, as shown in FIG. 2, the width A between the straight engaging portion 32 formed by one side of the rectangular plate member of the lock plate 3 and the facing portion formed by the opposite side 33 parallel thereto is , The width of the short side of the rectangular recess 4 is substantially the same, and when the lock plate 3 is inserted into the rectangular recess 4, the straight vertical wall 212 of the parking lock pole sleeve 2 and the lock plate 3 are The linear engagement portion 32 abuts, and the inner side 41 of the rectangular recess 4 and the opposite side 33 of the lock plate 3 are in contact with each other.
Are in contact with each other so that there is no gap or play.

The lock plate 3 is attached to the rectangular recess 4
The bolt 5 is fixed to the case 1 through the washer in the state of being inserted into the case 1.

In the fixing device for the parking lock pole sleeve of the first embodiment having the above-mentioned structure, the hole formed by penetrating a portion of the axial end of the case 1 relatively close to the outer periphery of the lid. However, since the diameter from the inside to the portion near the outside is large, and the diameter is reduced stepwise at the portion near the outside, the outside of the case 1 of the parking lock pole sleeve 2 is made by the shoulder portion 15. To prevent the escape.

Further, the lock plate 3 fixed to the case 1 through the washer by the bolt 5 axially moves the horizontal plane 211 of the cutout portion 21 of the parking lock pole sleeve 2 by the sandwiching portion 31 on the lower surface. The parking lock pole sleeve is prevented from coming inward from the case 1.

Further, in the lock plate 3 inserted in the rectangular recess 4 and fixed to the case 1 by the bolt, the linear engaging portion 32 at one end is fitted to the linear vertical wall 212 of the parking lock pole sleeve 2. Since the straight opposite side 33 comes into contact with the inner side 41 of the rectangular concave portion 4 so that there is no gap or play, the rotation of the parking lock pole sleeve is prevented. .

In the fixing device for the parking lock pole sleeve of the first embodiment having the above-mentioned operation, since the parking lock pole sleeve 2 is fixed by the lock plate 3 and the bolt 5, the number of parts is small and the fixing structure is secured. Is simple and has the effect of increasing the positional accuracy of the parking lock pole sleeve.

In the parking lock pole sleeve fixing device according to the first embodiment, the clamping portion 31 on the lower surface of the lock plate 3 fixed to the case 1 by the bolt 5 has the parking lock pole sleeve 2 fixed. The horizontal portion 211 of the cutout portion 21 is axially sandwiched and the linear engagement portion 3 at one end of the lock plate 3
2 engages with the straight vertical wall 212 formed on the outer peripheral wall of the parking lock pole sleeve 2,
Since they are in surface contact with each other, it is possible to easily improve the positional accuracy of the parking lock pole sleeve 2 in the rotation direction.

Further, since the parking lock pole sleeve fixing device of the first embodiment has only to satisfy the surface accuracy of the parking lock pole sleeve 2, the lock plate 3 and the rectangular recess 4, the processing is facilitated. Has the effect of doing.

Further, in the parking lock pole sleeve fixing device of the first embodiment, the number of parts is small as described above, so that the parts cost is reduced, and the machining is facilitated so that the machining cost is also reduced and the total cost is reduced. Has the effect.

(Second Embodiment) As shown in FIGS. 3 and 4, the fixing device for the parking lock pole sleeve of the second embodiment has the rectangular shape in which the lock plate 3 of the first embodiment is inserted. Instead of the concave portion 4, a linear projection 6 having a rectangular cross section that engages with the linear opposite side 33 of the lock plate 3 is formed on the inner wall surface of the case 1, and only this point is the first embodiment. The description of the same parts will be omitted.

In the fixing device for the parking lock pole sleeve of the second embodiment having the above-mentioned structure, the lock plate 3 fixed to the case 1 by the bolt is arranged so as to be engaged with the protrusion 6. The linear engagement portion 32 abuts the linear vertical wall 212 of the parking lock pole sleeve 2, and the linear opposite side 3
Since 3 is in contact with the linear wall surface 61 of the protrusion 6 so that there is no gap or backlash, the rotation of the parking lock pole sleeve is prevented, and other operations similar to those of the first embodiment are achieved. Play.

The parking lock pole sleeve fixing device of the second embodiment having the above-mentioned operation secures the parking lock pole sleeve 2 by the lock plate 3 and the bolt 5 engaged with the protrusion 6.
The number of parts is small, the fixing structure is simple, and the positional accuracy of the parking lock pole sleeve is improved.

Further, in the fixing device for the parking lock pole sleeve of the second embodiment, the holding portion 3 of the lock plate 3 fixed to the case 1 by the bolt 5 is provided.
1 axially clamps the horizontal portion 211 of the cutout portion 21 of the parking lock pole sleeve 2, and
The linear engaging portion 32 of the lock plate 3 engages with the linear vertical wall 212 formed on the outer peripheral wall of the parking lock pole sleeve 2, and the linear opposite side 33 of the lock plate 3 is the aforesaid. Since the protrusion 6 is configured so as to be in contact with the linear wall surface 61 so that there is no gap or backlash, both are in surface contact, so that the positional accuracy of the parking lock pole sleeve 2 in the rotation direction can be easily improved. It has the effect of being able to do it.

Further, the fixing device for the parking lock pole sleeve of the second embodiment is such that the parking lock pole sleeve 2, the lock plate 3 and the projection 6 are provided.
Since it suffices to satisfy the surface accuracy of No. 3, there is an effect that processing is facilitated.

Further, since the parking lock pole sleeve fixing device of the second embodiment forms the linear projections 6 on the inner wall surface of the case 1, the mold of the lid of the case 1 is formed as follows. If it is designed to, there is an effect that it is possible to eliminate the need to process each one,
As mentioned above, the number of parts is small, so the cost of parts is reduced,
Since the processing is facilitated, the processing cost can be reduced and the total cost can be reduced.

The embodiments described above are merely examples for the purpose of explanation, and the present invention is not limited to them. Those skilled in the art will recognize from the claims, the detailed description of the invention and the description of the drawings. Modifications and additions can be made without departing from the technical idea of the present invention.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a device according to a first embodiment of the present invention.

FIG. 2 is a partial plan view showing a parking lock pole sleeve, a lock plate and a bolt of the device of the first embodiment.

FIG. 3 is a vertical cross-sectional view showing a second embodiment device of the present invention.

FIG. 4 is a partial plan view showing a parking lock pole sleeve, a lock plate and a bolt of the device of the second embodiment.

FIG. 5 is a vertical cross-sectional view showing a conventional device.

FIG. 6 is a parking lock pole sleeve of a conventional device,
It is a fragmentary sectional view showing a case and a pin.

[Explanation of symbols]

 1 Case 2 Parking Lock Pole Sleeve 3 Lock Plate 4 Rectangular Recess 5 Bolt 21 Notch 211 Horizontal Plane 212 Straight Vertical Wall 31 Clamping Part 32 Straight Engaging Part 33 Opposite Side

Claims (5)

[Claims] 1. A cam that communicates with a parking lever via a rod slides, and a shoulder portion of a parking lock pole sleeve inserted in a hole formed in a case of an automatic transmission is axially moved. A sandwiching portion for sandwiching, a lock plate having an engaging portion for engaging with an engaging portion formed on the outer peripheral wall, and the lock plate for sandwiching the shoulder portion of the parking lock pole sleeve by the sandwiching portion. A fixing device for a parking lock pole sleeve, which comprises a fixing means that is attached to and fixed to the case. 2. The engagement portion according to claim 1, wherein the engagement portion is formed by a notch portion that is formed by linearly cutting out a part of an outer peripheral wall of the parking lock pole sleeve, and the linear shape is formed in a part of the lock plate. A locking device for a parking lock pole sleeve, characterized in that a linear engagement portion that engages with the notch portion is formed. 3. The parking lock pole sleeve fixing device according to claim 2, wherein the lock plate is formed of a rectangular plate member. 4. The width according to claim 3, wherein the lock plate has a width substantially equal to a width up to an opposing portion formed by an opposite side parallel to the linear engagement portion formed by one side of the rectangular plate member of the lock plate. A fixing device for a parking lock pole sleeve, wherein a substantially rectangular recess is formed in the case, the lock plate is inserted into the rectangular recess, and is fixed to the case by a bolt as the fixing means. 5. The distance according to claim 3, which is substantially equal to the width between the linear engaging portion formed by one side of the rectangular plate member of the lock plate and the facing portion formed by the other side facing the linear engaging portion. A fixing device for a parking lock pole sleeve, characterized in that a protrusion parallel to the other side is formed at the portion of (4) to lock the lock plate.