JP5643060B2 - Shift mechanism - Google Patents

Description

  The present invention relates to a shift mechanism applied to a vehicle.

  Conventionally, as a shift mechanism applied to a park lock or the like, an actuator that generates an operating force, a shaft as a rotating shaft that is rotated by the actuator, and a rotation that rotates around the axis of the shaft by the rotation of the shaft. A detent plate as a moving member, a rod as a moving mechanism that is moved by the rotation of the detent plate, a parking lock pole as a locking member that prevents rotation of the drive shaft by the movement of the rod, and a detent plate A device including a detent spring as a biasing member that is engaged and applies a biasing force stepwise to the rotation of the detent plate is known (see, for example, Patent Document 1).

  In this shift mechanism, the detent plate is rotated between a lock position where the parking lock pawl prevents the drive shaft from rotating and a lock release position where the parking lock pawl prevents the drive shaft from rotating. The detent plate is restricted from rotating to the locked position or the unlocked position by the spring force of the detent spring.

  And in order to set the rotation position of an actuator, the counting means which acquires the count value according to the rotation amount of the actuator is provided. The counting means determines that the actuator has rotated to the locked position or the unlocked position by detecting a state where the maximum value or the minimum value of the acquired count value does not change for a predetermined time. Thereby, the rotational position of the actuator is set.

JP 2004-308752 A

  However, in the shift mechanism as described above, the rotation of the rotation member at the lock position or the lock release position is restricted by a biasing member having a biasing force such as a detent spring.

  For this reason, even if the rotating member is positioned at the lock position or the unlocked position, it is difficult to fix the position of the rotating member due to expansion and contraction of the biasing member, and an error is likely to occur when detecting the rotation position of the actuator. In addition, when considering the expansion and contraction of the urging member, the structure becomes complicated, for example, it is necessary to input unique data of the urging member such as the deflection amount and deflection angle of the urging member.

  Accordingly, an object of the present invention is to provide a shift mechanism that can simplify detection of the rotational position of an actuator.

The present invention includes an actuator that generates an operating force, a rotating shaft that is rotated by the actuator, a rotating member that rotates around the axis of the rotating shaft by the rotation of the rotating shaft, and a rotating member that rotates the rotating member. A moving mechanism that is moved and operated by movement, a lock member that prevents rotation of the drive shaft by movement of the operation portion of the moving mechanism, and a stepped engagement with the rotating member that is engaged with the rotating member. A urging member for applying an urging force to the rotation member, wherein the rotation member includes a lock position where the lock member prevents rotation of the drive shaft, and rotation of the drive shaft by the lock member. The lock member is rotated between the lock release position and the rotation member. When the rotation member is rotated to the lock position or the lock release position, the rotation member contacts the rotation member. In contact with the rotating member Regulation member for regulating the movement provided, wherein the regulating member, when said rotating member is positioned at the lock position, and the rotary member and the first portion abutting the lock release position the pivot member A second portion that contacts the rotating member, and the first portion and the second portion are opposite to the operating portion of the moving mechanism with respect to the rotating member. It is arranged on the side .

  In this shift mechanism, a restricting member is provided in the vicinity of the turning member to restrict the turning of the turning member by contacting the turning member when the turning member is turned to the lock position or the unlocking position. Therefore, the rotating member can be reliably positioned at the locked position or the unlocked position.

  For this reason, there is no error in the rotation of the actuator at the lock position or the unlock position of the rotating member, and the rotation position of the actuator can be easily detected by detecting the rotation of the actuator without using a position detection switch or the like. Can be detected.

  Therefore, in such a shift mechanism, detection of the rotational position of the actuator can be simplified.

  According to the present invention, it is possible to provide a shift mechanism that can simplify the detection of the rotational position of the actuator.

It is a figure which shows the shift mechanism which concerns on 1st Embodiment of this invention. It is a side view of the shift mechanism which concerns on 1st Embodiment of this invention. It is a figure which shows the shift mechanism which concerns on 2nd Embodiment of this invention. It is a side view of the shift mechanism which concerns on 2nd Embodiment of this invention.

  The shift mechanism according to the embodiment of the present invention will be described with reference to FIGS.

(First embodiment)
1st Embodiment is described using FIG. 1, FIG.

  The shift mechanism 1 according to the present embodiment rotates around the axis of the rotating shaft 5 by the rotation of the actuator 3 that generates an operating force, the rotating shaft 5 that is rotated by the actuator 3, and the rotating shaft 5. The rotating member 7, the moving mechanism 9 that is moved by the rotation of the rotating member 7, the lock member 13 that prevents the drive shaft 11 from rotating by the movement of the moving mechanism 9, and the rotating member 7 And a biasing member 15 that applies a biasing force in a stepwise manner to the rotation of the rotation member 7.

  Further, the rotation member 7 is rotated between a lock position where the lock member 13 prevents the rotation of the drive shaft 11 and a lock release position where the lock member 13 prevents the rotation of the drive shaft 11 from being stopped.

  Further, in the vicinity of the rotating member 7, a regulating member 17 that contacts the rotating member 7 when the rotating member 7 rotates to the lock position or the unlocking position and restricts the rotation of the rotating member 7, 19 is provided.

  Further, the radial position from the rotation axis of the rotation member 7 to the connecting portion 21 between the rotation member 7 and the moving mechanism 9 is defined as a first radial position R1, and the rotation position is rotated from the rotation axis of the rotation member 7. When the position where the member 7 abuts against the regulating member 19 is the second radial position R2, the second radial position R2 is located on the smaller diameter side than the first radial position R1.

  Further, when the rotation member 7 is rotated to the lock position or the lock release position, the urging member 15 applies an urging force to the rotation member 7 in two stages of the lock position or the lock release position, and the rotation member. A biasing force is applied to the rotating member 7 while maintaining a gap between 7 and the regulating members 17 and 19.

  As shown in FIGS. 1 and 2, the actuator 3 is composed of an electric motor and is attached to the outside of the casing 23. The actuator 3 is actuated when a user such as a driver switches the shift range to drive the rotary shaft 5 to rotate.

  The rotating shaft 5 is provided so as to be able to rotate integrally with the actuator 3 and is accommodated in the casing 23 so as to be rotatable. A rotating member 7 is provided on the rotating shaft 5 so as to be integrally rotatable.

  The rotating member 7 is made of a thin plate and rotates around the axis of the rotating shaft 5 by the rotation of the rotating shaft 5. The rotating member 7 releases the lock position where the lock member 13 prevents the drive shaft 11 from rotating by the forward / reverse rotation of the rotary shaft 5, that is, the actuator 3, and the prevention of the rotation of the drive shaft 11 by the lock member 13. It is rotated between the unlocked position. The rotation of the rotating member 7 is transmitted to the moving mechanism 9.

  The moving mechanism 9 includes a moving member 25 and an operation member 27. The moving member 25 is formed of a long rod, and is disposed on the lower surface side of the holding member 29 provided inside the casing 23 so as to be movable in the axial direction. One end side of the moving member 25 is engaged with the rotating member 7 via the connecting portion 21, and the moving member 25 is moved in the axial direction by the rotation of the rotating member 7. An operation member 27 is provided on the other end side of the moving member 25.

  The operation member 27 includes a shaft portion 31 and an operation portion 33. The shaft portion 31 engages with a hole 37 formed in the end wall of the cylindrical holding member 35 fixed inside the casing 23, and the movement of the operation portion 33 is guided. The operation portion 33 is held inside the cylindrical holding member 35 so as to be movable in the axial direction, and an operation surface 39 formed of an inclined surface that contacts the lock member 13 and operates the lock member 13 is formed. In addition, a spring 41 serving as a waiting mechanism for the lock member 13 is disposed between the operation unit 33 and the moving member 25 when the lock member 13 prevents the drive shaft 11 from rotating. The operation member 27 operates the lock member 13 by moving the axial direction thereof so that the operation surface 39 of the operation unit 33 comes into contact with the lock member 13 or releases the contact.

  The lock member 13 is pivotally supported by a shaft support portion 47 in a recess 45 of a lock holding portion 43 provided in the casing 23, and includes a contact portion 49 and a lock portion 51. The abutting portion 49 is provided on one end side, and is disposed inside the cylindrical holding member 35 at the unlocked position of the rotating member 7, and the operation surface 39 of the operating portion 33 is at the locked position of the rotating member 7. The lock member 13 is abutted and rotated in a direction to prevent the drive shaft 11 from rotating. The lock portion 51 is provided on the other end side, and meshes with a gear 53 provided so as to rotate integrally with the drive shaft 11 when the lock member 13 is rotated in a direction to prevent the drive shaft 11 from rotating. The rotation of the shaft 11 is prevented. Further, the shaft support portion 47 on which the lock member 13 is supported is in contact with the lock member 13 and the lock holding portion 43 and urges the lock member 13 in the direction in which the lock portion 51 and the gear 53 are disengaged. Is arranged. The urging force of the spring 55 is set to be weaker than that of the spring 41 provided in the moving mechanism 9. This rotation of the lock member 13 prevents the rotation of the drive shaft 11 or cancels the rotation prevention.

  The drive shaft 11 is an output shaft or an input shaft of a speed change mechanism (not shown) provided on a power transmission path from the drive source to the wheels. The drive shaft 11 is provided with a gear 53 that can rotate integrally. When the gear 53 meshes with the lock member 13, the drive shaft 11 is prevented from rotating, and the drive force is transmitted from the drive source to the wheels. Be blocked. The rotation member 7 that prevents the rotation of the drive shaft 11 or releases the rotation prevention by changing the rotation position thereof is applied with an urging force stepwise by the urging member 15.

  The urging member 15 is formed of a leaf spring, one end is engaged with the cylindrical holding member 35, is fixed to the holding member 29 with a bolt, and the other end is engaged with the rotating member 7. The other end of the urging member 15 is an engaging portion 57 made of a roller, and the rotation of the rotation member 7 causes a gap between the lock recess 59 and the release recess 61 formed in the rotation member 7. Fluctuate and engage one of them. Specifically, the engaging portion 57 is engaged with the lock recess 59 of the rotating member 7 when the rotating member 7 is positioned at the locked position, and is rotated when the rotating member 7 is positioned at the unlocked position. It is engaged with the release recess 61 of the member 7. For this reason, the urging member 15 applies an urging force to the rotating member 7 in two stages of the lock position or the lock release position. Further, the urging member 15 is arranged on the rotating member 7 so as to hold a gap between the rotating member 7 and the regulating members 17 and 19 when the rotating member 7 is located at the lock position or the unlock position. Grants an energizing force.

  The restricting members 17 and 19 are respectively fixed to the casing 23 so as to protrude from the casing 23. The restricting members 17 and 19 are made of a member having rigidity such as a pin, and are arranged so as to contact the rotating member 7 at the maximum position when the rotating member 7 rotates. Specifically, when the rotation member 7 is located at the lock position, the restriction member 17 abuts on the rotation member 7 and restricts further rotation, and the restriction member 19 unlocks the rotation member 7. When it is in the position, it abuts against the rotation member 7 and restricts further rotation. Note that after the rotating member 7 comes into contact with the regulating members 17 and 19, a gap is held between the rotating member 7 and the regulating members 17 and 19 by the biasing member 15. Further, the second radial position R <b> 2, which is a position where the rotating member 7 comes into contact with the regulating member 19 from the rotating shaft center of the rotating member 7, moves with the rotating member 7 from the rotating shaft center of the rotating member 7. It is located on the smaller diameter side from the first radial position R1, which is the radial position to the coupling portion 21 with the mechanism 9. As a result, the rotation span of the rotation member 7 is increased, the movement stroke of the movement member 25 can be lengthened without setting a large rotation angle, and the lock member 13 is quickly locked and unlocked. be able to.

  In this way, by restricting the rotation of the rotation member 7 by the restriction members 17 and 19, there is no change in the lock position or the lock release position of the rotation member 7. For this reason, the rotational speed of the actuator 3 does not vary, and the rotating member 7 can be positioned at the lock position or the unlock position at a constant speed. Therefore, it is not necessary to use a detection means such as a position detection switch for detecting the rotation position of the actuator 3 or a calculation means for calculating the rotation position of the actuator 3 by inputting other information, and an encoder for detecting the rotation of the actuator 3. The rotational position of the actuator 3 can be detected simply by providing a detection means such as.

  In the shift mechanism 1 configured as described above, when the rotation member 7 is rotated to the lock position by the operation of the actuator 3, the moving member 25 is moved to the lock member 13 side, and the operation member 27 is contacted with the lock member 13. It contacts the contact portion 49. At this time, the operation surface 39 formed on the operation portion 33 of the operation member 27 presses the contact portion 49 of the lock member 13 and presses the contact portion 49 side of the lock member 13 against the urging force of the spring 55. To do. As a result, as shown by the solid line in FIG. 1, the lock portion 51 of the lock member 13 is pushed up with the shaft support portion 47 as a fulcrum and meshes with the gear 53, thereby preventing the drive shaft 11 from rotating. When the lock portion 51 is positioned on the tooth surface of the gear 53 and is not engaged with the gear 53, the lock portion 51 is urged toward the tooth bottom of the gear 53 by the spring 41 as a waiting mechanism. When the lock portion 51 is located at the meshing position with the gear 53, the locking portion 51 meshes with the gear 53. At this time, the maximum rotation position of the rotation member 7 is regulated by the rotation member 7 coming into contact with the regulation member 17.

  When the rotation member 7 is rotated to the unlocking position by the operation of the actuator 3 from the locked state of the lock member 13, the moving member 25 is moved to the rotation member 7 side, and the operation member 27 and the lock member 13 are brought into contact with each other. The contact with the portion 49 is released. At this time, the contact portion 49 of the lock member 13 is lifted by the urging force of the spring 55 and is accommodated in the cylindrical holding member 35. As a result, as shown by the imaginary line in FIG. 1, the lock portion 51 of the lock member 13 is lowered with the shaft support portion 47 as a fulcrum, and the meshing with the gear 53 is released, and the prevention of the rotation of the drive shaft 11 is released. The maximum rotation position of the rotation member 7 at this time is regulated by the rotation member 7 coming into contact with the regulation member 19.

  In such a shift mechanism 1, when the rotation member 7 is rotated to the lock position or the unlock position in the vicinity of the rotation member 7, the rotation member 7 is brought into contact with the rotation member 7 to restrict the rotation of the rotation member 7. Since the restricting members 17 and 19 are provided, the rotating member 7 can be reliably positioned at the locked position or the unlocked position.

  For this reason, there is no error in the rotation of the actuator 3 at the lock position or the unlock position of the rotating member 7, and the rotation of the actuator 3 can be detected without using a position detection switch or the like by detecting the rotation of the actuator 3. The position can be easily detected.

  Therefore, in such a shift mechanism 1, the detection of the rotational position of the actuator can be simplified.

  Further, since the second radial position R2 is positioned on the smaller diameter side than the first radial position R1, the rotation span of the rotating member 7 is increased by positioning the first radial position R1 on the outer diameter side. The locking member 13 can be quickly locked and unlocked by increasing the moving stroke of the moving mechanism 9 without increasing the rotation angle. In addition, by providing the second radial position R2 on the small diameter side, the relative position between the rotating member 7 and the regulating member 19 can be brought closer to each other, and the shift mechanism 1 can be compactly integrated.

  Further, when the rotation member 7 is rotated to the lock position or the lock release position, the urging member 15 applies an urging force to the rotation member 7 in two stages of the lock position or the lock release position, and the rotation member. A biasing force is applied to the rotating member 7 while maintaining a gap between 7 and the regulating members 17 and 19.

  For this reason, the rotation member 7 is in the lock position or the lock release position, and the biasing member 15 sets the position of the rotation member 7 by the biasing force, and there is a gap between the rotation member 7 and the regulating members 17 and 19. By holding the above, chattering at the time of vibration occurrence can be prevented, wear and deformation can be prevented, and functional stability and durability can be improved.

(Second Embodiment)
A second embodiment will be described with reference to FIGS.

  In the shift mechanism 101 according to the present embodiment, the rotating member 7 is accommodated in the casing 103 divided into two, and the regulating member 105 is a knock pin for positioning the fixing position of the divided casings 107 and 109 of the casing 103. . In addition, although the same code | symbol is described to the structure same as 1st Embodiment, description is abbreviate | omitted, but since it is the same structure as 1st Embodiment, a structure and functional description refer to 1st Embodiment. Although omitted, the obtained effects are the same.

  As shown in FIGS. 3 and 4, the casing 103 is composed of two divided casings 107 and 109. Further, the split casing 107 is provided with a lock contact portion 111 formed in a concave shape, and the split casing 109 is provided with a release contact portion 113 formed in a concave shape. In these divided casings 107 and 109, the restricting member 105 is inserted, and the fixed positions are positioned.

  The restricting member 105 is a single shaft-like member having rigidity, and is a knock pin that positions the fixed position between the divided casings 107 and 109 by inserting the divided casings 107 and 109 in the length direction of the rotating member 7. ing. When the rotation member 7 is rotated to the lock position in a state where the restriction member 105 is assembled to the casing 103, the lock position portion 115 of the rotation member 7 and the restriction member 105 are moved by the lock contact portion 111. When the rotation member 7 contacts and the rotation member 7 rotates to the unlocking position, the release position portion 117 of the rotation member 7 and the regulating member 105 come into contact with each other at the release contact portion 113 and the locking position of the rotation member 7 and The rotation at the unlock position is restricted. Note that after the rotating member 7 comes into contact with the restricting member 105, the biasing member 15 holds a gap between the rotating member 7 and the restricting member 105.

  In such a shift mechanism 101, since the regulating member 105 is a knock pin that positions the fixed position of the divided casings 107 and 109 of the casing 103, the rotating member 7 does not require a large design change in the peripheral members of the rotating member 7. 7 positioning can be performed. In addition, since the regulating member 105 is a single knock pin, the number of parts can be reduced.

  In the shift mechanism according to the embodiment of the present invention, the regulating member uses a member formed separately from the casing such as a pin. The casing may be provided integrally. In addition, the shape of the restricting member is not limited to a shaft-like member such as a pin, and may be any shape as long as it restricts the turning of the turning member.

  In the shift mechanism according to the embodiment of the present invention, the casing has a two-divided structure. However, the present invention is not limited to this, and a knock pin that positions the casing having a structure of two or more parts may be used as the regulating member.

DESCRIPTION OF SYMBOLS 1,101 ... Shift mechanism 3 ... Actuator 5 ... Rotating shaft 7 ... Rotating member 9 ... Moving mechanism 11 ... Drive shaft 13 ... Locking member 15 ... Energizing member 17, 19, 105 ... Restricting member 21 ... Connecting part R1 ... First 1 radial position R2 ... second radial position 103 ... casing 107, 109 ... split casing

Claims (4)

An actuator that generates an operating force, a rotating shaft that is rotated by the actuator, a rotating member that rotates around the axis of the rotating shaft by the rotation of the rotating shaft, and a moving operation by the rotation of the rotating member A moving mechanism, a lock member that prevents rotation of the drive shaft by movement of the operation portion of the moving mechanism, and a biasing force that is engaged with the rotating member and that is gradually applied to the rotating member. A shift mechanism including an urging member to be applied,
The pivot member is pivoted between a lock position where the lock member prevents rotation of the drive shaft and a lock release position where release of the rotation of the drive shaft by the lock member is released,
In the vicinity of the rotating member, there is provided a regulating member that abuts on the rotating member when the rotating member rotates to the lock position or the unlocked position and restricts the rotation of the rotating member. It is,
The regulating member includes a first portion that contacts the rotating member when the rotating member is positioned at the locked position, and the rotating member when the rotating member is positioned at the unlocked position. A second portion that abuts,
The shift mechanism, wherein the first part and the second part are arranged on the opposite side of the operating part of the moving mechanism with respect to the rotating member . The shift mechanism according to claim 1,
A radial position from the pivot axis of the pivot member to the connecting portion between the pivot member and the moving mechanism is defined as a first radial position, and the pivot member extends from the pivot axis of the pivot member. A shift mechanism characterized in that the second radial position is located on a smaller diameter side than the first radial position when the position in contact with the regulating member is the second radial position. The shift mechanism according to claim 1 or 2,
When the rotating member rotates to the locked position or the unlocked position, the biasing member applies a biasing force to the rotating member in two stages of the locked position or the unlocked position, and A shift mechanism characterized in that a biasing force is applied to the rotating member while maintaining a gap between the rotating member and the restricting member. The shift mechanism according to any one of claims 1 to 3,
The shift mechanism is characterized in that the rotating member is accommodated in a casing divided into at least two, and the restricting member is a knock pin for positioning a fixed position of the divided casings of the casing.

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