JP2016080124A - Parking lock device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make compatible the suppression of parking fail-out and the shortening of a changeover operation time after a changeover operation from a non-parking position to a parking position up to the completion of a parking lock operation.SOLUTION: In a parking lock device 10, a height Ta of a bottom face (position A) of a parking-side recessed groove 36 of a non-parking direction guide path 43 is lower than a height Td of a bottom face (position D) of a parking-side recessed groove 36 of a parking direction guide path 44, a height Tb of a bottom face (position B) of a non-parking side recessed groove 38 of the non-parking direction guide path 43 is higher than a height Tc of a bottom face (position C) of the non-parking side recessed groove 38 of the parking direction guide path 44, and a height Tnotp of a salient part 39 from the position A up to an apex face with which a spherical protrusion 32 is engaged in the non-parking direction guide path 43 is higher than a height Tp of the salient part 39 from the position C up to the apex face with which the spherical protrusion 32 is engaged in the parking guide path 44.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a parking lock device for a vehicle, and more particularly to a technique that enables both suppression of parking omission and shortening of a switching operation time from a switching operation from a non-parking position to a parking position until completion of parking lock operation. .

  A parking side groove corresponding to the parking position, a non-parking side groove corresponding to the non-parking position, and a convex portion formed between the parking side groove and the non-parking side groove are formed. A detent plate supported so as to be rotatable around a line, a detent spring having an engaging portion that sequentially engages with a parking groove and a non-parking groove in the detent plate, and rotates the detent plate. 2. Description of the Related Art A vehicle parking lock device including an actuator is known. For example, the parking lock device for vehicles of patent documents 1 and 2 is it.

JP 2014-91451 A JP 2013-130280 A

  FIG. 5 is a view showing an example of engagement of the detent spring 114 with the detent plate 112 in the conventional parking lock device 110 as in Patent Documents 1 and 2, and the left side shows the parking side concave groove 116 of the detent plate 112 and It is the figure which looked at the top part in which the non-parking side ditch | groove 118 and the convex part 120 between them were formed from the top, and the right side is the figure which looked at the top part of the detent plate 112 in one rotation centerline direction. . For example, the detent spring 114 rotates when the actuator is operated by a switching signal from the non-parking range to the parking range or from the parking range to the non-parking range and the detent plate 112 is rotated about one rotation center line. However, a rotatable engagement roller 122 is provided that is engaged with either the parking groove 116 or the non-parking groove 118 in a pressed state over the protrusion 120. As a result, the detent plate 112 has either a parking position where the engagement roller 122 is engaged with the parking groove 116 or a non-parking position where the engagement roller 122 is engaged with the non-parking groove 118. Is held by the detent spring 114.

  By the way, in order to prevent the so-called parking omission that switches from the parking position to the non-parking position even though the parking lock needs to be activated, the convex portion 120 of the detent plate 112 is provided high. . Therefore, even when switching from the non-parking position to the parking position, the engagement roller 122 moves over the raised protrusion 120 and moves from the non-parking groove 118 to the parking groove 116.

  FIG. 6 is a time chart from the switching operation from the non-parking position to the parking position in the conventional parking lock device 110 until the actual operation of the parking lock is completed. The section (1) in FIG. 6 is between the switching operation of the driver from the non-parking position to the parking position and the time t1 when the switching signal from the non-parking position to the parking position is input to the actuator by the switching operation. Control signal response time. In the section (2) of FIG. 6, the t1 time point when the actuator operation is started by the input of the switching signal, the detent plate 112 is rotated and the engagement roller 122 gets over the convex portion 120, and the non-parking side concave groove It is an operation time of the actuator from time t2 when the operation of the parking lock is completed by moving from 118 to the parking side concave groove 116 and being engaged. In the conventional parking lock device 110, since the convex portion 120 of the detent plate 112 is provided high, the detent plate 112 is used to move the engagement roller 122 from the non-parking side concave groove 118 to the parking side concave groove 116. Since a larger load is required to rotate the actuator, the responsiveness of the actuator is poor. As a result, the operation time of the actuator (section (2)) becomes longer, and it takes time to complete the operation of the parking lock. . Therefore, for example, when parking on an uphill road, it takes time until the parking lock is activated, and the vehicle speed increases during that time, and the input load when the parking lock is activated may increase.

  The present invention has been made against the background of the above circumstances. The object of the present invention is to suppress parking omission and switching operation time from the non-parking position to the parking position until the parking lock operation is completed. It is an object of the present invention to provide a parking lock device that can achieve both shortening and shortening.

  That is, the gist of the present invention is formed between the parking-side groove corresponding to the parking position and the non-parking-side groove corresponding to the non-parking position, and the parking-side groove and the non-parking-side groove. And a detent plate that is supported so as to be rotatable about one rotation center line, and sequentially engages with the parking groove and the non-parking groove in the detent plate in a pressed state. A parking lock device for a vehicle comprising a detent spring having an engaging portion and an actuator for rotating the detent plate, wherein the engaging portion of the detent spring includes the parking groove and the non-parking side It is provided so as to be movable in the groove direction of the recessed groove, and the engagement portion that engages with the parking groove is forward. A non-parking direction guide path that guides toward the non-parking side groove and a parking direction guide path that guides the engaging portion that engages with the non-parking side groove toward the parking side groove The bottom surface of the parking-side concave groove of the non-parking direction guiding path is arranged so that the engaging portion engaged with the parking-side concave groove moves to the non-parking direction guiding path side. The bottom surface of the non-parking side groove of the parking direction guide path is formed lower than the bottom surface of the non-parking side groove, and the engaging portion engaged with the non-parking side groove is arranged on the parking direction guide path side. The non-parking direction guide path is formed lower than the bottom surface of the non-parking side groove, and the parking-side groove and the non-parking groove The height of the portion where the engaging portion engages in the parking direction guide path of the convex portion formed between the groove-side concave grooves is the height of the portion where the engaging portion engages in the non-parking direction guide path. This is because it is lower than the height.

  According to the parking lock device for a vehicle of the present invention, the engaging portion of the detent spring is provided so as to be movable in the groove direction of the parking side concave groove and the non-parking side concave groove. A non-parking direction guide path for guiding the engaging portion engaging with the groove toward the non-parking side groove, and the engaging portion engaging with the non-parking side groove toward the parking side groove. A parking direction guiding path that guides the parking side, and the bottom surface of the parking-side recessed groove of the non-parking direction guiding path moves the engaging portion engaged with the parking-side recessed groove to the non-parking direction guiding path side. The parking direction guide path is formed lower than the bottom surface of the non-parking side groove, and the non-parking side groove of the parking direction guide path is The surface is formed lower than the bottom surface of the non-parking side groove of the non-parking direction guide path so as to move the engaging portion engaged with the non-parking side groove to the parking direction guide path side, The height of the portion of the convex portion formed between the parking-side concave groove and the non-parking-side concave groove where the engaging portion engages in the parking direction guide path is the engagement height in the non-parking direction guide path. That is, the height is lower than the height of the engaging portion. For this reason, at the time of switching from the parking position to the non-parking position, the engaging portion of the detent spring moves from the parking groove to the non-parking side through the non-parking direction guide path that requires a large load for rotating the detent plate. When moving from the non-parking position to the parking position, the engaging portion moves from the non-parking side concave groove through the parking direction guide path where the load for rotating the detent plate is smaller than the non-parking direction guide path. Since it moves to the parking groove, it is possible to suppress the parking omission and to shorten the switching operation time from the switching operation from the non-parking position to the parking position until the parking lock operation is completed.

  Here, preferably, the parking groove and the non-parking groove are provided through the outer peripheral portion of the detent plate in the plate thickness direction, and the detent spring is attached to the position fixing member, The detent plate is provided so as to be rotatable around a rotation axis perpendicular to a rotation center line of the detent plate. For this reason, the engagement part of the detent spring is moved in the groove direction of the parking side concave groove and the non-parking side concave groove by the rotation of the detent plate around one rotational center line.

  Preferably, the engaging portion of the detent spring is a spherical protrusion that protrudes from the tip of the detent spring toward the bottom surface of the parking groove and the non-parking groove. For this reason, since the detent plate is appropriately held at the parking position or the non-parking position by the engagement of the spherical protrusions with the parking-side groove and the non-parking-side groove, unintended parking lock and unintended parking lock operation Is suppressed.

  Preferably, the spherical protrusion provided at the tip of the detent spring includes a sphere and a sphere receiving member that rotatably supports the sphere. For this reason, in the movement in the pressed state of the spherical protrusion from the parking side groove to the non-parking side groove through the non-parking direction guide path and from the non-parking side groove to the parking side groove through the parking direction guide path. Since the sphere moves while rotating, the load for rotating the detent plate of the electric actuator is reduced, and the switching operation time for switching between the non-parking position and the parking position is shortened.

It is a figure explaining the structure of a parking lock apparatus in detail. It is a figure explaining in detail the movement path | route of the engaging part of a detent spring by rotation of the detent plate of the parking lock apparatus of FIG. The relative height of the first concave portion, the convex portion and the second concave portion in the first path and the second path of the detent plate in the parking lock device of FIG. It is a figure explaining the movement of the engaging part of a detent spring at the time of switching operation between non-parking ranges in detail. It is a figure explaining the structure of the parking lock apparatus of another Example in detail. It is a figure explaining the detent plate and detent spring of the conventional parking lock apparatus. 6 is a time chart from the switching operation from the non-parking range to the parking range in the parking lock device of FIG. 5 until the operation of the parking lock is actually completed.

  Hereinafter, an embodiment of a parking lock device of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram for explaining the configuration of the parking lock device 10 in detail. The parking lock device 10 is a parking operation for switching the shift lever of the shift operation device or the shift range of the drive device between the parking range (P range) and a non-parking range other than the parking range (non-P range). This is a shift-by-wire (SBW) system in which parking lock is activated or released by a parking lock control signal corresponding to a switch operation of a switch (P switch). The parking lock device 10 is provided with a parking gear 12 fixed to an output shaft that is operatively connected to a drive wheel (not shown), and is rotatably provided to a meshing position that meshes with the parking gear 12. A parking lock pole 14 that locks the rotation of the parking lock 14, a parking rod 18 that is inserted into the tapered portion 16 that contacts the parking lock pole 14 and supports the tapered portion 16 at one end, and a tapered portion 16 provided on the parking rod 18. A detent plate 22 that is pivotally connected to the other end of the parking rod 18 and is positioned at a parking position and a non-parking position by a moderation mechanism, and a detent plate 22 Fixed and supported so as to be rotatable around one rotation center line O. 24, an electric actuator 26 that rotationally drives the shaft 24, a rotary encoder 28 that detects the rotation angle of the shaft 24, and moderation of the rotation of the detent plate 22 to hold it in either the parking position or the non-parking position. A detent spring 30 and a spherical protrusion 32 as an engaging portion provided at the tip thereof.

  FIG. 1 shows a case where the parking lock device 10 is in the parking lock state. When the parking lock device 10 is in the parking lock state, the parking lock pole 14 and the parking gear 12 are engaged with each other, thereby preventing the parking gear 12 from rotating. Since the parking gear 12 is operatively connected to driving wheels (not shown), the rotation of the driving wheels is similarly prevented when the parking gear 12 is in a locked state. The position of the parking lock pole 14 is adjusted by changing the contact position with the tapered portion 16 provided at one end of the parking rod 18. For example, when the parking lock pawl 14 comes into contact with the large diameter portion of the taper portion 16, the parking gear 12 and the parking lock pawl 14 mesh with each other to enter the parking lock state (FIG. 1). On the other hand, when the parking lock pole 14 contacts the small diameter portion of the tapered portion 16, the parking gear 12 is disengaged and the parking lock state is released.

  The contact position between the parking lock pole 14 and the tapered portion 16 is adjusted based on the axial position of the tapered portion 16. The axial position of the tapered portion 16 is changed by the parking rod 18, and the contact position between the parking lock pole 14 and the tapered portion 16 is adjusted accordingly. For example, when the tapered portion 16 is moved in the arrow C direction, the parking lock pole 14 comes into contact with the small diameter side of the tapered portion 16. Therefore, the engagement of the parking lock pole 14 and the parking gear 12 is released as the tip of the parking lock pole 14 is moved vertically downward (in the direction of arrow D). That is, the parking lock state is released.

  On the other hand, when the tapered portion 16 is moved in the direction opposite to the arrow C, the tip of the parking lock pole 14 comes into contact with the large diameter side of the tapered portion 16. Therefore, as the tip of the parking lock pole 14 is moved vertically upward in the direction opposite to the arrow D, the parking lock pole 14 and the parking gear 12 are engaged with each other. That is, the parking lock state is set.

  The movement of the parking rod 18 in the axial direction is adjusted according to the rotational position of the shaft 24, that is, the rotational position of the detent plate 22. The detent plate 22 is operatively connected to the drive shaft of the electric actuator 26 via the shaft 24 and is driven around the one rotation axis O by the electric actuator 26 together with the parking rod 18 at the shift position of the drive device. It functions as a shift positioning member for switching between a certain parking position and a non-parking position. The top 34 of the detent plate 22 has a parking groove 36 corresponding to the parking position, a non-parking groove 38 corresponding to the non-parking position, and a space between the parking groove 36 and the non-parking groove 38. A convex portion 39 is formed.

  The detent spring 30 has a spherical protrusion 32 composed of a spherical body 40 such as a steel ball and a spherical body receiving member 41 that rotatably holds the spherical body 40 at its tip, and the spherical body 40 has a concave groove 36 on the parking side and a non-parking. The detent plate 22 is always biased toward the top 34 so as to engage with the bottom surface of the side groove 38. When the detent plate 22 is rotated in the B direction around one rotation center line O by the operation of the electric actuator 26 based on the parking lock execution command signal output from the electronic control device that controls the traveling range, the spherical protrusion 32 is moved over the convex part 39 from the non-parking side concave groove 38 to the parking side concave groove 36 corresponding to the parking position while the sphere 40 rotates on the top 34 of the detent plate 22 and is engaged in a pressed state. It is done. Further, when the detent plate 22 is rotated in the direction A based on the parking lock release command signal output from the electronic control device, the spherical protrusion 32 rotates on the top 34 of the detent plate 22 while being on the parking side concave groove. 36 is moved over the convex portion 39 to the non-parking side groove 38 corresponding to the non-parking position, and is engaged in the pressed state. By engaging the spherical protrusion 32 with the parking-side concave groove 36 or the non-parking-side concave groove 38, the predetermined rotation position of the detent plate 22 in the B direction or the A direction is maintained.

  FIG. 2 is a left side of the parking lock device 10 for explaining in detail the movement path of the spherical protrusion 32 of the detent spring 30 on the top 34 of the detent plate 22 due to the rotation of the detent plate 22. 34 is a view of the detent plate 22 as viewed from above, and the right side is a view of the top 34 of the detent plate 22 in the direction of one rotation center line O. The broken line is a perspective line showing the parking direction guide path 44. Note that the direction of the rotation center line O coincides with the X-axis direction of FIG. 2 and FIG. 3 to be described later, in order to more easily explain the movement path of the spherical protrusion 32 when the parking lock is activated and released, the parking side concave groove 36 provided in the detent plate 22 is not provided. The ratio of the height of the side concave groove 38 and the convex portion 39 from the reference position, the relative relationship between the height and the size of the spherical protrusion 32, and the like are emphasized from the actual detent plate and detent spring. In the right diagram of FIG. 2, a solid arrow (1) indicates a movement path of the spherical protrusion 32 in the non-parking direction guide path 43 described later, and corresponds to the arrow (1) of the left diagram of FIG. To do. A broken arrow (3) indicates a movement path of the spherical protrusion 32 in a parking direction guide path 44 described later, and corresponds to an arrow (3) in the left diagram of FIG.

  The detent plate 22 is spherically shaped from the parking-side groove 36 corresponding to the parking position to the non-parking-side groove 38 corresponding to the non-parking position by rotating the detent plate 22 in the negative Y-axis direction indicated by an arrow R in FIG. A non-parking direction guide path 43 (not shown) formed in the Y-axis direction for guiding the protrusion 32 along the movement path (1) and the non-parking position by the rotation of the detent plate 22 in the positive Y-axis direction. A groove-shaped parking direction guide path 44 in the Y-axis direction that guides the spherical protrusion 32 along the movement path (3) from the non-parking side groove 38 corresponding to the parking position to the parking side groove 36 corresponding to the parking position. , One rotation center line O direction (X axis direction) is provided on the top 34 in parallel. The detent spring 30 is provided on the position fixing member 42 so as to be rotatable in the arrow direction around a rotation axis perpendicular to the one rotation center line O (X-axis direction) of the detent plate 22. 32 is movable in the groove direction (X-axis direction) of the parking-side groove 36 and the non-parking-side groove 38.

  FIG. 3 shows the parking lock device 10 when the detent plate 22 is positioned in each of the non-parking direction guide path 43 and the parking direction guide path 44 in the parking side groove 36, the convex part 39, and the non-parking side groove 38. It is a figure explaining the height position of the spherical protrusion 32 of this. The movement paths (1) to (4) of the spherical protrusion 32 in FIG. 2 correspond to the movement paths (1) to (4) in FIG. In FIG. 3, the height Ta from the reference plane P parallel to the XY plane in FIG. 2 of the bottom surface of the parking groove 36 in the non-parking direction guide path 43 with which the spherical protrusion 32 at the position A engages is determined on the parking side. The parking side recesses in the parking direction guide path 44 where the spherical protrusions 32 at the position D are positioned so that the spherical protrusions 32 engaged with the recessed grooves 36 are moved to the non-parking direction guide path 44 side (movement path (4)). The parking-side concave groove 36 is inclined so as to be lower than the height Td of the bottom surface of the groove 36. In addition, the height Tb of the bottom surface of the non-parking side groove 38 in the non-parking direction guide path 43 where the spherical protrusion 32 at position B is located is such that the spherical protrusion 32 engaged with the non-parking side groove 38 is guided in the parking direction. The non-parking side groove 38 is higher than the height Tc of the bottom surface of the non-parking side groove 38 in the parking direction guide path 44 with which the engagement ball at the position C is engaged so as to move toward the road 44 side. Is provided with an inclination. Since the spherical protrusion 32 of the detent spring 30 is biased toward the top 34 side of the detent plate 22, the spherical protrusion 32 moved to the bottom surface (position B) of the non-parking side groove through the non-parking direction guide path 43 is A movement path (2) in the negative direction of the X-axis in FIG. 2 from the bottom surface (position B) of the non-parking side groove of the non-parking direction guide path 43 to the bottom surface (position C) of the non-parking side groove of the parking direction guide path 44 The spherical protrusion 32 that has been moved and engaged along the direction and released from the parking lock and moved to the bottom surface (position D) of the parking side groove 36 through the parking direction guide path 44 is Moved from the bottom surface (position D) to the bottom surface (position A) of the parking groove in the non-parking direction guide path 43 along the movement path (4) in the positive direction of the X axis. Parking lock operation Te is completed. Accordingly, the bottom surface (position B) of the non-parking side concave groove 38 of the non-parking direction guide path 43 is a transitional state when the spherical protrusion 32 moves from the parking position to the non-parking position. The bottom surface (position C) of the non-parking groove is a non-parking position. In addition, the bottom surface (position D) of the parking-side groove 36 of the parking direction guide path 44 is a transitional state when the spherical protrusion 32 moves from the non-parking position to the parking position. The bottom surface (position A) of the parking groove 36 is the parking position. Thereby, the movement of the spherical protrusion 32 from the parking position to the non-parking position is limited to the non-parking direction guide path 43, and the movement from the non-parking position to the parking position is limited to the parking direction guide path 44.

  In FIG. 3, the height Tp from the bottom surface (position C) of the non-parking side groove 38 of the parking direction guide path 44 to the top surface where the spherical protrusion 32 engages in the parking direction guide path 44 of the convex portion 39. Is the height Tnotp from the bottom surface (position A) of the parking-side groove 36 of the non-parking direction guide path 43 to the top surface where the spherical protrusion 32 is engaged in the non-parking direction guide path 43 of the convex portion 39. Also, the parking side concave groove 36, the non-parking side concave groove 38, and the convex portion 39 of the detent plate 22 are formed so as to be lower. Thus, when the parking lock operation is released, the bottom surface (position A) of the parking groove 46 through the non-parking direction guide path 43 of the spherical protrusion 32 of the detent spring 30 is changed to the bottom surface (position B) of the non-parking groove 38. ) Requires a large load on the electric actuator 26 to rotate the detent plate 22. On the other hand, when the parking lock is activated, the bottom surface (position C) of the non-parking side groove 38 through the parking direction guide path 44 of the spherical protrusion 32 of the detent spring 30 is changed to the bottom surface (position D) of the parking side groove 36. For the movement, the load required for the electric actuator 26 for rotating the detent plate 22 is smaller than when the parking lock operation is released.

  As described above, according to the parking lock device 10 of the present embodiment, the detent plate 22 includes the non-parking direction guide path 43 from the parking-side groove 36 to the non-parking-side groove 38 and the non-parking-side groove 38. A parking direction guide path 44 extending from the parking side to the parking side groove 36 is provided along the one-turn center line direction, and the height Ta of the bottom surface (position A) of the parking side groove 36 in the non-parking direction guide path 43 is determined by parking. The height Tb of the bottom surface (position B) of the non-parking side groove 38 of the non-parking direction guide path 43 is lower than the height Td of the bottom surface (position D) of the parking side groove 36 of the direction guiding path 44. It is higher than the height Tc of the bottom surface (position C) of the non-parking groove on the road 44, and the convex portion 39 extends from the bottom surface (position A) of the parking groove 36 on the non-parking direction guide road 43. The height Tnotp from the bottom surface (position C) of the non-parking side groove 38 of the parking direction guide path 44 to the parking direction guide of the convex part 39 is as follows. It is higher than the height Tp of the top surface where the spherical protrusion 32 is engaged in the path 44. For this reason, when the parking lock operation is released, the spherical protrusion 32 of the detent spring 30 is not moved from the parking lock position through the non-parking direction guide path 43 in which a large load for rotating the detent plate 22 is required for the electric actuator 26. When the parking lock is activated, the spherical protrusion 32 moves to the parking lock position, and the non-parking lock 32 passes through the parking direction guide path 44 in which the load required for the electric actuator 26 that rotates the detent plate 22 is smaller than the non-parking direction guide path 43. Since the movement from the position to the parking lock position, the parking omission is suppressed, and the switching from the non-parking range to the parking range, such as a shift lever and P switch, until the parking lock operation is completed. Operation time is shortened. By shortening the switching operation time, for example, when the parking lock is operated on an uphill road, the operation of the parking lock is completed before the vehicle speed V is increased, thereby reducing the load applied to the drive system, for example. Therefore, the component size can be reduced and the unit can be made compact.

  Further, according to the parking lock device 10 of the present embodiment, the parking-side concave groove 36 and the non-parking-side concave groove 38 are provided through the outer peripheral portion of the detent plate 22 in the plate thickness direction. Is provided on the position fixing member 42 so as to be rotatable around a rotation axis perpendicular to the rotation center line O of the detent plate 22. For this reason, the spherical protrusion 32 of the detent spring 30 is moved in the groove direction of the parking-side concave groove 36 and the non-parking-side concave groove 38 by the rotation of the detent plate 22 around the rotation center line O.

  Further, according to the parking lock device 10 of the present embodiment, the engaging portion of the detent spring 30 is a spherical protrusion that protrudes from the distal end portion of the detent spring 30 toward the bottom surfaces of the parking-side groove 36 and the non-parking-side groove 38. 32. For this reason, since the detent plate 22 is appropriately held at the parking position or the non-parking position by the engagement of the spherical protrusions 32 with the parking-side concave groove 36 and the non-parking-side concave groove 38, parking is unsuccessful and unintended. The operation of the parking lock is suppressed.

  Further, according to the parking lock device 10 of the present embodiment, the spherical protrusion 32 provided at the distal end portion of the detent spring 30 includes the sphere 40 and the sphere receiving member 41 that rotatably supports the sphere. For this reason, the spherical protrusions 32 from the parking side groove 36 through the non-parking direction guide path 43 to the non-parking side groove 38 and from the non-parking side groove 38 to the parking side groove 36 through the parking direction guide path 43. In the movement in the pressed state, the sphere 40 moves while rotating, so the weight for rotating the detent plate 22 of the electric actuator 26 is reduced, and the switching operation time for switching between the non-parking position and the parking position is shortened. Is done.

  Next, another embodiment of the present invention will be described. In the following embodiments, portions that are substantially common in function to the above embodiments are assigned the same reference numerals, and detailed descriptions thereof are omitted.

  FIG. 4 is a diagram illustrating the configuration of the parking lock device 46 in detail. In the parking lock device 46 of this embodiment, the top portion 34 of the detent plate 22 is engaged with the spherical protrusion 32 of the non-parking direction guide path 43 of the convex portion 39 and the spherical shape of the parking direction guide path 44 of the convex portion 39. A partition wall 48 is provided for partitioning the portion with which the protrusion 32 is engaged.

  As described above, according to the parking lock device 46 of the present embodiment, the same effects as those of the first embodiment can be obtained.

  Further, according to the parking lock device 46 of the present embodiment, when switching from the parking position to the non-parking position, the spherical protrusion from the parking-side groove 36 to the non-parking-side groove 38 through the non-parking direction guide path 43. Since the movement of the spherical protrusion 32 from the non-parking direction guide path 43 to the parking direction guide path 44 is prevented by the partition wall 48 during the movement of the 32, the parking direction guide with a smaller load for rotating the detent plate 22 is used. The movement of the spherical protrusion 32 through the path 44 from the parking-side concave groove 36 to the non-parking-side concave groove 38 is suppressed. Thereby, parking omission is suppressed more.

  As mentioned above, although this invention was demonstrated in detail with reference to the table | surface and drawing, this invention can be implemented in another aspect, and can be variously changed in the range which does not deviate from the main point.

  For example, in the parking lock device 10 of the first embodiment described above, a series of switching from the parking position to the non-parking position and the switching from the non-parking position to the parking position is performed from the arrow (1) to the arrow (4) in FIG. As shown in FIG. 2, the spherical protrusion 32 is formed by moving counterclockwise. However, the present invention is not limited to this. For example, in FIG. 2, the spherical protrusion 32 is clockwise. The parking side groove 36, the non-parking side groove 38, and the protrusion 39 may be formed in the detent plate 22 so as to be switched by moving.

  In addition, the spherical protrusion 32 of the first embodiment is configured by the spherical body 40 and the spherical body receiving member 41 that rotatably holds the spherical body 40, but is not limited to this, and is a simple spherical protrusion or the like. There may be.

  It should be noted that the above description is merely an embodiment, and other examples are not illustrated. However, the present invention is implemented in variously modified and improved modes based on the knowledge of those skilled in the art without departing from the gist of the present invention. Can do.

10, 46: Parking lock device 22: Detent plate 26: Electric actuator (actuator)
30: Detent spring 32: Spherical protrusion (engagement part)
36: Parking side groove 38: Non-parking side groove 39: Recess 40: Sphere 41: Sphere receiving member 42: Position fixing member 43: Non-parking direction guide path 44: Parking direction guide path O: One rotation center line

Claims (1)

A parking-side groove corresponding to the parking position, a non-parking-side groove corresponding to the non-parking position, and a convex portion formed between the parking-side groove and the non-parking-side groove are formed. A detent plate supported so as to be rotatable about a center line, a detent spring having an engagement portion that sequentially engages with the parking-side concave groove and the non-parking-side concave groove of the detent plate, and the detent A parking lock device for a vehicle comprising an actuator for rotating a plate,
The engaging portion of the detent spring is provided so as to be movable in the groove direction of the parking side concave groove and the non-parking side concave groove,
A non-parking direction guide path for guiding the engaging portion that engages with the parking-side concave groove toward the non-parking-side concave groove, and the engaging portion that engages with the non-parking-side concave groove on the parking side A parking direction guideway that leads to the ditch is attached,
The bottom surface of the parking-side concave groove of the non-parking direction guiding path is configured to move the engaging portion engaged with the parking-side concave groove toward the non-parking direction guiding path. It is formed lower than the bottom of the parking groove
The bottom surface of the non-parking side concave groove of the parking direction guide path is configured to move the engagement portion engaged with the non-parking side concave groove to the parking direction guide path side. It is formed lower than the bottom surface of the non-parking side ditch,
The height of the portion of the convex portion formed between the parking-side concave groove and the non-parking-side concave groove where the engaging portion engages in the parking direction guide path is the engagement height in the non-parking direction guide path. A parking lock device for a vehicle, characterized in that the height is lower than a height of a portion with which the joint portion engages.

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