JP2019044887A - Supporting structure of parking pole - Google Patents

Abstract

To provide a space surrounded by one end of a pole shaft and a supporting hole of a transmission case, as a non-sealed space.SOLUTION: In a supporting structure 1 of a parking pole 5 having a pole shaft 7 inserted to a supporting hole 210 of a transmission case 20 at a longitudinal one end 7a side, and disposed along an axis Y in parallel with an output shaft 9, and a parking pole 5 rotatably supported at the other end 7b side of the pole shaft 7, and constituted to engage and disengage an engagement portion 51 to a tooth portion 91 of a parking gear 90 by rotation about an axis Y of the parking pole 5, the pole shaft 7 is restricted in displacement in a direction to fall from the supporting hole 210 by a bracket 6 supporting the other end 7b of the pole shaft 7 and fixed to the transmission case 20, and a through hole 70 for communicating a space in the supporting hole 210 to a space in the transmission case 20 is disposed in a state of penetrating through the pole shaft 7 in a longitudinal direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a support structure for a parking pole.

  The automatic transmission for vehicles is provided with the parking mechanism for controlling rotation of an output axis at the time of parking of the vehicles carrying the automatic transmission concerned (for example, patent documents 1).

Japanese Patent Application Laid-Open No. 11-82736

FIG. 3 is a view for explaining a supporting structure of a parking pole according to a conventional example.
(A) of FIG. 3 is a schematic view explaining a parking mechanism.
(B) of FIG. 3 is a view schematically illustrating a cross section of the plane A in (a) of FIG.
In FIG. 3B, the dimensional difference between the outer diameter of the pole shaft 700 and the inner diameter of the support hole 210 is exaggerated. In fact, this dimensional difference is negligible.

  As shown in FIG. 3A, the parking mechanism 10 includes a manual shaft 2 that rotates about a central axis X in conjunction with the operation of a select lever (not shown), and a rod plate 3 that rotates integrally with the manual shaft 2. A connecting portion 45 at one end 42 in the longitudinal direction has a park rod 4 supported by the rod plate 3 and a parking pole 5 operated by the park rod 4.

  A cam 8 for driving the parking pole 5 is provided on the other end 41 side of the park rod 4. When the parking pole 5 is driven by the cam 8, the locking claws 51 of the parking pole 5 engage with the parking gear 90 provided on the output shaft 9, and the rotation of the output shaft 9 is restricted (in the figure, , Arrow a)).

As shown in FIG. 3B, in the support structure 100 of the parking pole 5 according to the conventional example, the parking pole 5 is supported by a pole shaft 700.
In the pole shaft 700, the parking pole 5 is rotatably supported around an axis parallel to the axial direction of the output shaft 9 (hereinafter, referred to as an axis Y).
The parking pole 5 is restricted from falling off the pole shaft 700 by a bracket 600 attached to the transmission case 20 with a bolt B.

  One end 710 of the pole shaft 700 in the longitudinal direction is inserted into the support hole 210 of the transmission case 20, and the other end 720 is inserted into the through hole 610 of the bracket 600.

Here, the dimensional difference between the pole shaft 700 and the support hole 210 is very small, and the support hole 210 of the transmission case 20 is a blind hole. Therefore, a space R3 surrounded by one end 710 of the pole shaft 700 in the direction of the axis Y and the support hole 210 of the transmission case 20 is a sealed space.
When the pole shaft 700 is inserted into the support hole 210, the air in the space R3 is compressed. As a result, the internal pressure of the space R3 is higher than the internal pressure of the space R2 in the transmission case 20. Therefore, the internal pressure of space R3 acts in the direction (space R2 side) which pushes out pole shaft 700 from support hole 210.

  The pole shaft 700 pushed out of the support hole 210 presses the bottom wall 620 of the through hole 610 of the bracket 600 at the other end 720, and the bottom wall 620 is deformed or worn away. Then, the pole shaft 7 comes off, and the parking pole 5 can not be held. Therefore, the rotation of the output shaft 9 can not be restricted.

  Therefore, even if the pole shaft is inserted into the support hole of the transmission case, it is required that the space enclosed by one end of the pole shaft and the support hole of the transmission case does not become a sealed space.

The present invention
A parking gear that rotates integrally with the output shaft of the transmission;
A shaft-like support member which is inserted into the support hole of the transmission case in the longitudinal direction and which is disposed along an axis parallel to the output shaft;
A parking pole rotatably supported at the other end side of the support member located in the transmission case,
A parking pole support structure in a parking mechanism configured to engage and disengage an engagement portion of the parking pole with a tooth portion of an outer periphery of the parking gear by rotation of the parking pole about the axis.
The support member supports the other end of the support member and a restricting member fixed to the transmission case restricts displacement of the support member in the direction of dropping from the support hole.
The communication hole for communicating the space in the support hole with the space in the transmission case is formed by penetrating the support member in the longitudinal direction.

  According to the present invention, the space enclosed by one end of the pole shaft and the support hole of the transmission case can be prevented from becoming a sealed space.

It is a figure explaining the support structure of a parking pole. It is a figure explaining the support structure of the parking pole concerning a modification. It is a figure explaining the support structure of the parking pole concerning a prior art example.

  Hereinafter, an embodiment of the present invention will be described by taking an automatic transmission adopting the support structure 1 of the parking pole 5 as an example.

FIG. 1 is a view for explaining a support structure 1 of the parking pole 5.
FIG. 1A is a view for explaining the parking mechanism 10.
(B) of FIG. 1 is a view schematically showing a cross section obtained by cutting the periphery of the parking pole 5 in (a) of FIG.
The dimensional difference between the outer diameter of the pole shaft 7 and the inner diameter of the support hole 210 is exaggerated. In fact, this dimensional difference is negligible.

  As shown in FIG. 1, the automatic transmission for a vehicle is provided with a parking mechanism 10 for restricting the rotation of the output shaft 9 when the vehicle equipped with the automatic transmission is parked.

[Parking pole 5]
As shown in (a) of FIG. 1, the parking pole 5 has a plate-like base 50. As shown to (b) of FIG. 1, the penetration hole 55 which penetrates the said base 50 in the thickness direction is formed in this base 50. As shown in FIG.
The parking pole 5 is rotatably supported by a pole shaft 7 penetrating the insertion hole 55.

The pole shaft 7 is supported by the support hole 210 of the transmission case 20 and the through hole 61 of the bracket 6 at one end 7 a side and the other end 7 b side in the longitudinal direction, respectively.
In this state, the pole shaft 7 is provided along the axis Y parallel to the output shaft 9.

  Therefore, the parking pole 5 supported by the pole shaft 7 is rotatable around the axis Y. By rotation of the parking pole 5, the engaging portion 51 provided on the base 50 is the parking gear 90. It is engaged with and disengaged from the tooth portion 91 provided on the outer periphery.

[Pole shaft 7]
As shown to (b) of FIG. 1, the pole shaft 7 is a cylindrical member which has the through-hole 70 which penetrates the said pole shaft 7 to a longitudinal direction. The through hole 70 is formed with an inner diameter d1 over the entire length of the pole shaft 7 in the longitudinal direction. One longitudinal end 7 a of the pole shaft 7 is inserted into a support hole 210 of a transmission case 20 described later. The other end 7 b in the longitudinal direction of the pole shaft 7 is inserted into a through hole 61 of a bracket 6 described later.

[Transmission case 20]
As shown in (b) of FIG. 1, the transmission case 20 has bosses 21 and 26 that protrude to the inside (right direction in the drawing) of the transmission case 20. The boss portion 21 protrudes inside the transmission case 20 along the axis Y. The boss portion 26 protrudes inside the transmission case 20 along an axis Y1 parallel to the axis Y.

The distal end surface 21a of the boss portion 21 and the distal end surface 26a of the boss portion 26 are flat surfaces orthogonal to the axes Y and Y1, respectively.
The front end surface 26 a of the boss portion 26 is located more inside the transmission case 20 than the front end surface 21 a of the boss portion 21. The separation distance L1 between the end surfaces 26a and 21a in the directions of the axes Y and Y1 is set to be slightly longer than the thickness T1 of the parking pole 5.

  The boss portion 21 is provided with a bottomed support hole 210 whose opening is directed into the transmission case 20. A communication hole 211 communicating the outside and the inside of the transmission case 20 is opened at the bottom 212 of the support hole 210. The center line of the support hole 210 and the center line of the communication hole 211 substantially coincide with each other on the axis Y.

  The support hole 210 has an inner diameter larger than the inner diameter D2 of the communication hole 211, and is formed with an inner diameter that matches the outer diameter D1 of the pole shaft 7 (D1> D2). The bottom 212 of the support hole 210 is a step that is a boundary between the support hole 210 and the communication hole 211 (hereinafter, the bottom 212 is also referred to as the step 212).

  The boss portion 26 has a bolt hole 261. The bolt hole 261 is provided in a straight line along the axis Y 1 at the center of the boss portion 26, and the bolt hole 261 is opened inside the transmission case 20.

  The bracket 6 is in contact with the front end surface 26 a of the boss portion 26 in the direction of the axis Y. The bracket 6 is fixed to the boss portion 26 by a bolt B penetrating the through hole 62.

[Bracket 6]
The bracket 6 is a plate-like member having a rectangular shape when viewed from the direction of the axis Y (see (a) of FIG. 1). In the bracket 6, through holes 61 and 62 are formed on one end side and the other end side of the plate-like base 60. The through holes 61 and 62 penetrate the base 60 in the thickness direction.

As described above, the bracket 6 is fixed to the boss portion 26 by the bolt B penetrating the through hole 62. In this state, the bracket 6 is in the direction perpendicular to the axis Y inside the transmission case 20. It is provided.
Furthermore, in this state, the through hole 61 of the bracket 6 is disposed at a position where the center line of the through hole 61 substantially overlaps the axis Y.

  In the bracket 6, the surface 6a on one side in the direction of the axis Y and the surface 6b on the other side are flat surfaces parallel to each other, and the bracket 6 has the surface 6a on one side and the surface 6b on the other side. It is fixed to the boss 26 in a direction perpendicular to the direction.

  The bracket 6 has a length L2 in a direction orthogonal to the axis Y longer than the distance Lx between the axis Y and the axis Y1, and straddles the end surface 21a of the boss 21 and the end surface 26a of the boss 26. It has a length L2 of play.

Therefore, in the bracket 6, the peripheral edge portion surrounding the through hole 61 in the surface 6 a on one side faces the base 50 of the parking pole 5 in the axis Y direction.
In this state, the parking pole 5 is restricted in displacement in the direction of the axis Y by the boss 21 on the transmission case 20 side and the bracket 6 (see (b) in FIG. 1).

  Further, in the bracket 6, the peripheral edge portion surrounding the through hole 62 in the surface 6a on one side is in contact with the end surface 26a of the boss portion 26 from the direction of the axis Y1 over the entire surface.

  In the bracket 6, a caulking portion 611 is provided on the other surface 6 b side of the through hole 61. The area of the through hole 61 where the caulking portion 611 is provided has an inner diameter smaller than the outer diameter D1 of the pole shaft 7.

One end 7 a of the pole shaft 7 in the longitudinal direction is inserted into the support hole 210 of the transmission case 20, and the other end 7 b is inserted into the through hole 61 of the bracket 6.
The movement of the pole shaft 7 in the direction of the axis Y is restricted by the step 212 which is the boundary between the support hole 210 and the communication hole 211 and the caulking portion 611 of the through hole 61 of the bracket 6.

  Here, as shown in FIG. 1B, the through hole 70 of the pole shaft 7 is a space R1 surrounded by one end 7a of the pole shaft 7 and the support hole 210 of the transmission case 20, and the transmission It is open to the space R2 in the case 20.

  Therefore, since the space R1 communicates with the space R2 through the through hole 70 of the pole shaft 7, the space R1 does not become an enclosed space.

Furthermore, the space R1 and the space R2 communicate with the outside of the transmission case 20 through the communication hole 211, and the support hole 210 and the communication hole 211 function as a breather.
Thus, when the internal pressure of the transmission case 20 becomes higher than the atmospheric pressure, for example, during traveling of a vehicle equipped with an automatic transmission, it is possible to prevent the oil OL from leaking from a seal boundary surface such as an oil seal (not shown).

As described above, in the embodiment,
(1) a parking gear 90 that rotates integrally with the output shaft 9 of the transmission;
A shaft-shaped pole shaft 7 (supporting member) which is inserted in the support hole 210 of the transmission case 20 at one end 7 a side in the longitudinal direction and arranged along the axis Y parallel to the output shaft 9;
And a parking pole 5 rotatably supported at the other end 7b side of the pole shaft 7 located in the transmission case 20,
Support structure of the parking pole 5 in the parking mechanism 10 configured to engage and disengage the engaging portion 51 of the parking pole 5 with the tooth portion 91 of the outer periphery of the parking gear 90 by rotation of the parking pole 5 about the axis Y Is 1 and
The pole shaft 7 supports the other end 7 b of the pole shaft 7 and is restricted in displacement in the direction of coming off from the support hole 210 by the bracket 6 (regulating member) fixed to the transmission case 20.
A through hole 70 (communication hole) for communicating the space in the support hole 210 with the space in the transmission case 20 is provided by penetrating the pole shaft 7 in the longitudinal direction.

  With this configuration, a space R1 surrounded by one end 7a of the pole shaft 7 and the support hole 210 of the transmission case 20 communicates with the space R2 in the transmission case 20 through the through hole 70 of the pole shaft 7. . Therefore, even if the pole shaft 7 is inserted into the support hole 210 of the transmission case 20, the space R1 can be prevented from becoming a sealed space.

(2) The bracket 6 has a through hole 61 (insertion hole) into which the other end 7b side of the pole shaft 7 is inserted,
In the through hole 61, a caulking portion 611 with which the other end 7b of the pole shaft 7 abuts is provided on the opposite side to the support hole 210,
The pole shaft 7 has a configuration in which the displacement in the direction of falling off from the support hole 210 is restricted by the caulking portion 611 with which the other end 7 b abuts.

With this configuration, when inserting the pole shaft 7 into the support hole 210, the space R1 in the support hole 210 communicates with the space R2 in the transmission case 20 via the through hole 61 of the pole shaft 7. Is held in the
Therefore, since the support hole 210 does not form a sealed space, the internal pressure in the support hole 210 does not increase even if the pole shaft 7 is inserted into the support hole 210.

When the internal pressure of the support hole 210 increases, the pole shaft 7 is pushed in the direction of dropping off from the support hole 210 by the internal pressure, and the other end 7 b of the pole shaft 7 comes in pressure contact with the bracket 6. With the above configuration, the internal pressure of the support hole 210 does not increase, so the other end 7 b of the pole shaft 7 does not press against the bracket 6.
Therefore, the displacement in the direction in which the pole shaft 7 falls off from the support hole 210 can be easily regulated by the crimped portion 611 provided in the through hole 61 of the bracket 6.
Therefore, it is not necessary to increase the thickness in the direction of the axis Y of the bracket 6 in order to restrict the movement of the pole shaft 7 in the direction of coming off from the support hole 210.
The thickness of the bracket 6 can be reduced to a thickness necessary to support the other end 7 b of the pole shaft 7. Thus, the weight reduction of the bracket 6 can be achieved, which can contribute to the weight reduction of the automatic transmission equipped with the parking mechanism 10.

(3) The support hole 210 is configured to have the communication hole 211 (through hole) penetrating the transmission case 20.

  According to this structure, since the support hole 210 and the communication hole 211 function as a breather, it is possible to prevent the oil OL from leaking from the seal interface such as an oil seal.

FIG. 2 is a view for explaining the support structure of the parking pole 5 according to the modification.
(A) of FIG. 2 is a figure explaining 1 A of support structures of the parking pole 5 concerning the modification 1. FIG.
FIG. 2B is a view for explaining a support structure 1B of the parking pole 5 according to the second modification.
In these modified examples, a drawing corresponding to a cross section obtained by cutting the periphery of the parking pole 5 in (a) of FIG.

[Modification 1]
As shown in (a) of FIG. 2, a breather hose H is inserted into the communication hole 211 from the outside of the transmission case 20. The breather hose H is connected to an oil pan (not shown).

While the vehicle equipped with the automatic transmission is traveling, the oil OL in the transmission case 20 is agitated by rotation of the output shaft 9 or the like. Due to this stirring, a part of the oil OL may be misty.
Therefore, by inserting the breather hose H in communication with the oil pan side into the communication hole 211, even if the misty oil OL is discharged from the communication hole 211 to the outside of the transmission case 20, it is released. Oil OL can be recovered via breather hose H.

in this way,
(4) The breather hose H may be inserted into the communication hole 211 from the outside of the transmission case 20.

  With this configuration, even if the misty oil OL is discharged from the communication hole 211 to the outside of the transmission case 20, the released oil OL can be recovered via the breather hose H. , You can reduce the consumption of oil OL.

[Modification 2]
As shown in (b) of FIG. 2, in the communication hole 211, the breather cap C is fitted in the communication hole 211. The breather cap C shuts off the communication between the inside and the outside of the transmission case 20.

  Thus, it is possible to discharge only air from the communication hole 211 to the outside of the transmission case 20 and prevent the oil OL from leaking out of the communication hole 211 to the outside of the transmission case 20.

(5) The communication hole 211 is configured such that the communication between the inside and the outside of the transmission case 20 is blocked by the breather cap C fitted into the communication hole 211.

  With this configuration, only air can be discharged to the outside of the transmission case 20, and the oil OL can be prevented from leaking to the outside of the transmission case 20. Therefore, the consumption of oil OL can be suppressed.

1, 1A, 1B Support structure 2 manual shaft 3 rod plate 4 park rod 5 parking pole 6 bracket 7 pole shaft 8 cam 9 output shaft 10 parking mechanism 20 transmission case 21 boss portion 26 boss portion 50 base portion 51 locking claw 55 insertion Hole 61 through hole 70 through hole 7a one end 7b other end 210 support hole 211 communication hole 212 step 611 caulking portion B bolt C breather cap H breather hose R1, R2 space X axis Y axis

Claims (5)

A parking gear that rotates integrally with the output shaft of the transmission;
A shaft-like support member which is inserted into the support hole of the transmission case in the longitudinal direction and which is disposed along an axis parallel to the output shaft;
A parking pole rotatably supported at the other end side of the support member located in the transmission case,
A parking pole support structure in a parking mechanism configured to engage and disengage an engagement portion of the parking pole with a tooth portion of an outer periphery of the parking gear by rotation of the parking pole about the axis.
The support member supports the other end of the support member and a restricting member fixed to the transmission case restricts displacement of the support member in the direction of dropping from the support hole.
A support structure for a parking pole, wherein a communication hole for communicating the space in the support hole with the space in the transmission case is provided by penetrating the support member in the longitudinal direction. The restriction member has an insertion hole into which the other end side of the support member is inserted,
In the insertion hole, a caulking portion with which the other end of the support member abuts is provided on the side opposite to the support hole,
2. The parking pole support structure according to claim 1, wherein a displacement in a direction in which the supporting member comes off from the supporting hole is restricted by a caulking portion with which the other end abuts. 3.   The said support hole is a through-hole which penetrates the said transmission case, The support structure of the parking pole of Claim 1 or Claim 2 characterized by the above-mentioned.   The support structure of the parking pole according to claim 3, wherein a breather hose is inserted into the support hole from the outside of the transmission case.   The parking pole support structure according to claim 3, wherein the communication between the inside and the outside of the transmission case is blocked in the support hole by a breather cap fitted in the support hole.

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