JP2014099956A - Drive device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive device for a vehicle capable of suppressing fracture of a bottom of a boss part without making the device large-sized/heavy as a whole.SOLUTION: The drive device for a vehicle comprises: a boss part 21 which protrudes in a support member 2 formed from a resin material; and a fitting part 36 formed in a motor housing. The fitting part 36 includes: a tubular part 33 which is abutted to an edge portion 24 of a bottom of the boss part 21 to cover an outer side face of the boss part 21; and an inward flange 35 which covers a distal end face 22 of the boss part 21 by forming an insertion hole 34. The drive device further comprises: a tapping screw 40 including a screw part 41 which is loosely inserted into the insertion hole 34 and threaded into the boss part 21, and a head part 42 holding the inward flange 35 with the distal end face 22 of the boss part 21; and a protrusion 23 which protrudes on the distal end face 22 of the boss part 21 and is collapsed with the inward flange 35.

Description

  The present invention relates to a vehicle drive device.

  Conventionally, as a vehicle drive device, for example, a device described in Patent Document 1 is known. As shown in FIG. 9, in this apparatus, a boss portion 102 protruding from a support member 101 made of a resin material is covered with a fitting portion 104 of a motor housing 103 and a screw 105 is tightened to tighten the support member 101 and the fitting. The joint 104 is fastened. At this time, the motor housing 103 is positioned with respect to the support member 101 at a position where the front end surface 104a of the fitting portion 104 and the peripheral edge portion 102a of the boss portion 102 are in pressure contact with each other (portion A in the figure A).

German Patent Application Publication No. 10 2009 033 472 A1 (Figs. 3 and 6)

  By the way, in Patent Document 1, since the motor housing 103 is positioned with respect to the support member 101 at a portion in FIG. A, a force for pulling out the boss portion 102 by an axial force acts when the screw 105 is fastened. Stress is generated at the root of By the action of this stress, there is a possibility that the root of the boss portion 102 is broken at the position indicated by the wavy line in the figure. Therefore, it is necessary to increase the thickness of the boss portion 102 in order to ensure the strength of the boss portion 102, and accordingly, the entire apparatus must be increased in size and weight.

  The objective of this invention is providing the drive device for vehicles which can suppress the fracture | rupture of the root of a boss | hub part, without enlarging and weight increase as the whole apparatus.

  In order to solve the above problem, the invention according to claim 1 is a motor housing provided with an electric motor, a driven member, a connecting member that drives and connects the electric motor and the driven member, and the motor. In a vehicle drive device comprising a support member that supports a housing, a boss portion that is made of a resin material and projects from one of the motor housing and the support member, and is formed on the other of the motor housing and the support member. A fitting portion that is in contact with the peripheral edge of the base of the boss portion and covers the outer surface of the boss portion; and an inward flange that forms an insertion hole and covers the tip surface of the boss portion Having a fitting part, a screw part loosely inserted into the insertion hole and screwed into the boss part, and a head part that sandwiches the inward flange between the tip surface of the boss part, Motor how A fastener for fastening the ring and the support member, projecting from the said front end surface of the boss portion, and summarized in that and a projection portion which is collapsed between the inward flange.

  According to this configuration, the motor housing is positioned with respect to the support member in a state in which the cylindrical portion of the fitting portion is in contact with the peripheral portion at the base of the boss portion, and the support is supported by the fastener. Fastened with the member. At this time, the protrusions are crushed between the front end surface of the boss part and the inward flange, and the gap between them is clogged. When the fastener is fastened, a force that is pulled out toward the inward flange by an axial force acts on the boss portion, so that stress is generated at the base of the boss portion. At this time, the protruding portion is further crushed between the tip surface of the boss portion and the inward flange and the gap between them is clogged, so that the pulling force is alleviated and the stress generated at the base of the boss portion Is also eased. Therefore, it is not necessary to increase the wall thickness in order to ensure the strength of the boss portion, and the entire apparatus can be further reduced in size and weight.

The gist of the invention according to claim 2 is that, in the vehicle drive device according to claim 1, the protrusion is disposed closer to the outer peripheral side of the tip surface of the boss.
According to the same configuration, even if an axial misalignment occurs in the boss part and the fitting part (cylinder part) because the protruding part is arranged closer to the outer peripheral side of the tip surface of the boss part. Thus, the protrusion can be crushed by applying the protrusion to the inward flange more reliably.

The invention according to claim 3 is the gist of the vehicle drive device according to claim 1 or 2, wherein the protruding portion extends over the entire circumference of the tip surface of the boss portion. To do.
According to this configuration, the pulling force due to the axial force can be sufficiently mitigated by the protrusions over the entire circumference of the tip surface.

  According to a fourth aspect of the present invention, in the vehicle drive device according to the first or second aspect, at least three of the protrusions are arranged at equiangular intervals in the circumferential direction of the tip surface of the boss portion. It is a summary.

  According to this configuration, the three or more protrusions arranged at equal angular intervals are each crushed from a state where they hit the inward flange, thereby further stabilizing the overall deformation. can do.

  The present invention has an effect of suppressing breakage at the base of the boss portion without increasing the size and weight of the entire apparatus.

The disassembled perspective view which shows one Embodiment of this invention. Sectional drawing which shows the same embodiment. Sectional drawing which shows the same embodiment. The perspective view which shows a boss | hub part. The schematic diagram which shows a window regulator apparatus. The perspective view which shows a deformation | transformation form. The perspective view which shows a deformation | transformation form. Sectional drawing which shows a deformation | transformation form. Sectional drawing which shows a prior art form.

An embodiment in which the present invention is embodied in a wind regulator device for a vehicle such as an automobile will be described.
As shown in FIG. 5, the window regulator device 1 includes a substantially H-shaped support member 2 made of a resin material. In the support member 2, a vehicle door (not shown) is provided below the window frame. It is attached. A drum 11 is pivotally supported at the center of the support member 2, front pulleys 12 and 13 are pivotally supported at an upper end portion and a lower end portion at the front of the vehicle, and a rear end is provided at an upper end portion and a lower end portion at the rear of the vehicle. Side pulleys 14 and 15 are pivotally supported.

  The support member 2 is mounted with a front guide 16 as a driven member so as to be movable in a substantially vertical direction along its front edge portion, and as a driven member in a substantially vertical direction along its rear edge portion. A rear guide 17 is movably mounted. The moving directions of the front guide 16 and the rear guide 17 are parallel to each other, and fix and support the lower edge portion of the window glass G, respectively. Accordingly, the window glass G moves up and down as the front guide 16 and the rear guide 17 move in the vertical direction along the support member 2.

  The first cable C1 whose one end is locked to the drum 11 extends downward and obliquely forward toward the front pulley 13, and is hung on the front pulley 13 and extends obliquely upward, and further on the front side at the other end. Locked to the guide 16. Similarly, the second cable C2 having one end locked to the drum 11 extends upward and obliquely rearward toward the rear pulley 14, and is hung on the rear pulley 14 and extends downward and obliquely forward. The other terminal is locked to the rear guide 17. The first and second cables C1 and C2 are wound around the drum 11 at each end so that when one of the first and second cables C1 and C2 is wound, the other is unwound. It has become.

  The third cable C3 having one end locked to the front guide 16 extends obliquely upward and rearward toward the front pulley 12, and is hooked on the front pulley 12 and obliquely rearward downward toward the rear pulley 15. Extend. The third cable C3 is hung on the rear pulley 15 and extends upward and obliquely rearward, and is locked to the rear guide 17 at the other terminal.

  Therefore, for example, when the first cable C1 is wound and the second cable C2 is unwound as the drum 11 rotates in one direction, the front guide 16 connected to the first cable C1 is pulled down, and the front guide The rear guide 17 connected to 16 via the third cable C3 is pulled down. Then, the window glass G whose lower edge portion is fixed to the front guide 16 and the rear guide 17 is lowered.

  On the contrary, when the second cable C2 is wound and the first cable C1 is unwound along with the rotation of the drum 11 in the reverse direction, the rear guide 17 connected to the second cable C2 is pulled up, and the rear The front guide 16 connected to the side guide 17 via the third cable C3 is pulled up. And the window glass G by which the lower edge part was fixed to the front side guide 16 and the rear side guide 17 raises.

  As shown in FIGS. 1 and 2, a substantially bottomed cylindrical motor housing 30 made of, for example, a resin material is attached to the support member 2 in accordance with the arrangement of the drum 11. The motor housing 30 is provided with an electric motor (not shown), an appropriate reduction mechanism (for example, a worm gear) for reducing the rotation speed of the electric motor, and an output shaft 30 a coaxial with the drum 11. It protrudes to the outside. The motor housing 30 is connected so that the output shaft 30 a rotates integrally with the drum 11 while being attached to the support member 2. Accordingly, when the electric motor is driven, the rotation reduced in speed is transmitted from the output shaft 30a to the drum 11. As described above, as the drum 11 rotates, the window glass G moves up and down in accordance with the rotation direction. The drum 11 and the cables C1 to C3 constitute a connecting member together with a speed reduction mechanism and the like.

  Here, the motor housing 30 integrally has a plurality of (three) attachment portions 31 extending substantially along the radial direction centering on the output shaft 30a, and the attachment portions 31 serve as fasteners. The tapping screw 40 is fastened to the support member 2.

  That is, as shown in FIG. 2, each attachment portion 31 has a flange 32 extending substantially along a radial direction centering on the output shaft 30 a and substantially projects from the flange 32 toward the support member 2. A cylindrical tube portion 33 is provided. Further, a substantially circular insertion hole 34 concentric with the cylindrical portion 33 is formed in the flange 32. The flange 32 forms an inward flange 35 that protrudes around the insertion hole 34 toward the inner peripheral side of the cylindrical portion 33. The cylindrical portion 33 and the inward flange 35 constitute a fitting portion 36.

  On the other hand, as shown in FIG. 3, the support member 2 has a substantially cylindrical boss portion 21 that is concentric with each inward flange 35 and protrudes toward the inward flange 35. The outer diameter of the boss portion 21 is set smaller than the inner diameter of the cylindrical portion 33. The inner diameter of the insertion hole 34 is set to be smaller than the outer diameter of the boss portion 21 and larger than the inner diameter of the boss portion 21.

  On the distal end surface 22 facing the inward flange 35 of the boss portion 21, a protruding portion 23 projects from the outer peripheral side. As shown in FIG. 4, the projecting portion 23 extends over the entire circumference of the tip surface 22 of the boss portion 21 and has a substantially annular shape. Further, the protrusion 23 is inclined so that the tip is sharp.

  When the motor housing 30 is attached to the support member 2, the boss portion 21 is inserted into the cylindrical portion 33 until the protruding portion 23 comes into contact with each inward flange 35. In this state, when the screw portion 41 of the tapping screw 40 is loosely inserted into the insertion hole 34 and screwed while being tapped into the boss portion 21, the head portion 42 of the tapping screw 40 and the tip surface 22 (projection portion 23) of the boss portion 21 are connected. An inward flange 35 is sandwiched between them.

  In the present embodiment, the screw portion 41 is screwed into the boss portion 21 until the opening end surface 37 of the cylindrical portion 33 facing the peripheral edge portion 24 contacts the peripheral edge portion 24 of the boss portion 21. As a result, the protrusion 23 pushed by the inward flange 35 is crushed with a relatively small load. That is, the projecting length L1 along the axial direction of the cylindrical portion 33 from the inward flange 35 is larger than the projecting length L2 along the axial direction of the boss portion 21 from the peripheral portion 24, and before the crushing from the peripheral portion 24. The distance L3 is smaller than the distance L3 along the axial direction to the tip of the protrusion 23. However, the difference between the protruding length L1 along the axial direction of the cylindrical portion 33 from the inward flange 35 and the protruding length L2 along the axial direction of the boss portion 21 from the peripheral edge portion 24 is small. The motor housing 30 that is fastened to the support member 2 by the tapping screw 40 is positioned with respect to the support member 2 in a state in which the cylindrical portion 33 is in contact with the peripheral portion 24 at the base of the boss portion 21. Thereby, the outer surface of the boss portion 21 is covered with the cylindrical portion 33, and the front end surface 22 is covered with the inward flange 35.

Next, the operation of this embodiment will be described.
The motor housing 30 is positioned with respect to the support member 2 in a state where the cylindrical portion 33 of the fitting portion 36 is in contact with the peripheral edge 24 at the base of the boss portion 21, and is fastened to the support member 2 by a tapping screw 40. At this time, the protrusion 23 is crushed between the front end surface 22 of the boss portion 21 and the inward flange 35 so that the gap between them is clogged. When the tapping screw 40 is fastened, a force that is pulled out toward the inward flange 35 by the axial force acts on the boss portion 21, so that stress is generated at the base of the boss portion 21. At this time, the protrusion 23 is further crushed between the front end surface 22 of the boss portion 21 and the inward flange 35 and the gap between them is clogged, so that the pulling force is alleviated and the stress generated at the base of the boss portion 21 is reduced. Is also eased. That is, the stress generated by the axial force is distributed to the base of the boss portion 21 and the protrusion 23.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) In the present embodiment, the pulling force acting on the boss portion 21 due to the axial force is relieved, and the stress generated at the base of the boss portion 21 is also relieved. Therefore, it is not necessary to increase the thickness of the boss portion 21 or to increase the outer diameter of the base of the boss portion 21 in order to ensure the strength of the boss portion 21, and the overall apparatus can be further reduced in size and weight. And since the mounting space in the vehicle door can be reduced, the overhang of the vehicle door to the vehicle interior side can be reduced, and thus the indoor space can be widened.

  (2) In the present embodiment, the protrusion 23 is disposed closer to the outer peripheral side of the tip surface 22 of the boss 21, so that the boss 21 and the fitting portion 36 (tubular portion 33) are misaligned. Even so, the protrusion 23 can be applied to the inward flange 35 more reliably and the protrusion 23 can be crushed.

  (3) In the present embodiment, the protrusion 23 extends over the entire circumference of the tip surface 22 of the boss 21, so that the pulling force due to the axial force is applied to the protrusion over the entire circumference of the tip surface 22. The portion 23 can be sufficiently relaxed.

In addition, you may change the said embodiment as follows.
As shown in FIG. 6, three substantially cones disposed on the tip surface 22 at equal angular intervals in the circumferential direction centered on the axial direction of the boss portion 21 instead of the substantially annular projecting portion 23. You may employ | adopt the protrusion part 51 of a shape. These protrusions 51 are arranged near the outer peripheral side of the front end surface 22 of the boss portion 21. By changing in this way, in addition to the same effects as (1) and (2) of the above embodiment, when the tapping screw 40 is fastened, these protrusions 51 arranged at equal angular intervals are formed on the inward flange 35. By being crushed from the point-struck state, an effect that the overall deformation can be further stabilized can be obtained.

  The protrusion 51 may have a substantially pyramid shape. Further, four or more protrusions 51 may be disposed on the distal end surface 22 at equal angular intervals in the circumferential direction centering on the axial direction of the boss portion 21. Furthermore, the protrusion 51 may not be disposed near the outer peripheral side of the tip surface 22 of the boss 21 as long as it can contact the inward flange 35.

  As shown in FIG. 7, instead of the substantially annular projection 23, a pair of substantially arc-shaped projections 52 extending on the distal end surface 22 in the circumferential direction centering on the axial direction of the boss 21. May be adopted. These protrusions 52 are arranged closer to the outer peripheral side of the front end surface 22 of the boss portion 21.

  Note that, when the tapping screw 40 is fastened, both the protrusions 52 are crushed from the state where they hit the inward flange 35 at two places, so that the deformation as a whole is stabilized to some extent. It is more preferable to ensure the length in the circumferential direction.

  In addition, three or more protrusions 52 may be disposed on the distal end surface 22 at equal angular intervals in the circumferential direction centered on the axial direction of the boss portion 21. Further, the protrusion 52 may not be disposed near the outer peripheral side of the tip surface 22 of the boss portion 21 as long as it can contact the inward flange 35.

  -As shown in FIG. 8, the arrangement | positioning relationship of the supporting member 2, the motor housing 30, and the boss | hub part (21) and a fitting part (36) may be reverse. In this case, the support member 2 may be made of a material other than the resin material (for example, a metal material).

In the embodiment, the protrusion 23 may not be disposed near the outer peripheral side of the tip surface 22 of the boss portion 21 as long as it can contact the inward flange 35.
-In the said embodiment, the fitting of the outer surface of the boss | hub part 21 and the inner surface of the fitting part 36 may be fitting by a polygonal shape, for example, and spline fitting.

In the embodiment, the support member 2 and the motor housing 30 may be fastened by a nut portion formed on the inner wall surface of the boss portion 21 and a bolt that is screwed to the nut portion.
In the embodiment, the motor housing 30 may be made of a material other than a resin material (for example, a metal material).

In the embodiment, the drum 11 may be built in the motor housing 30.
-In the said embodiment, the cables C1-C3 may be connected as one cable. In this case, the number of guides (16, 17) for fixing and supporting the window glass G may be one.

  In the above embodiment, a gear and a toothed belt meshed with the gear may be adopted instead of the drum 11 and the cables C1 to C3. In this case, one toothed belt may be connected, and one guide (16, 17) for fixing and supporting the window glass G may be used.

  The present invention may be applied to, for example, a motor housing for opening and closing a vehicle door (swing door, slide door, back door, etc.) and a base member fastening structure that supports the motor housing. Or you may apply to the fastening structure of the motor housing which concerns on the opening / closing drive of the movable panel mounted in the roof part of a vehicle, and the base member which supports this motor housing. Or you may apply to the fastening structure of the motor housing which concerns on driving of exterior parts, such as a movable grill shutter and a movable spoiler, and a power seat, and the motor housing.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) The guide for fixing and supporting the window glass as the driven member, the drum as the connecting member, and a cable wound around the drum. A window regulator device comprising a vehicle drive device.

  (B) A guide for fixing and supporting the window glass as the driven member, a gear as the connecting member, and a toothed belt meshed with the gear. Regulator apparatus comprising: a vehicle drive device.

  DESCRIPTION OF SYMBOLS 2 ... Support member, 21 ... Boss part, 22 ... Tip surface, 23, 51, 52 ... Projection part, 24 ... Peripheral part, 30 ... Motor housing, 33 ... Cylindrical part, 34 ... Insertion hole, 35 ... Inward flange, 36 ... fitting part, 40 ... tapping screw (fastener), 41 ... screw part, 42 ... head.

Claims (4)

In a vehicle drive device comprising: a motor housing provided with an electric motor; a driven member; a connecting member that drives and connects the electric motor and the driven member; and a support member that supports the motor housing.
A boss portion made of a resin material and projecting from one of the motor housing and the support member;
A fitting portion formed on the other of the motor housing and the support member, the tube portion contacting the peripheral edge at the base of the boss portion and covering the outer surface of the boss portion, and an insertion hole; A fitting portion having an inward flange covering the tip surface of the boss portion;
A screw portion loosely inserted into the insertion hole and screwed into the boss portion; and a head portion sandwiching the inward flange between the tip end surface of the boss portion, and the motor housing and the support member. A fastener to be fastened;
A vehicular drive device comprising: a protruding portion that protrudes from the tip surface of the boss portion and is crushed with the inward flange. The vehicle drive device according to claim 1,
The vehicular drive device according to claim 1, wherein the protrusion is disposed closer to an outer peripheral side of the tip surface of the boss. In the vehicle drive device according to claim 1 or 2,
The vehicle drive device according to claim 1, wherein the protruding portion extends over the entire circumference of the tip surface of the boss portion. In the vehicle drive device according to claim 1 or 2,
3 or more of the said protrusion parts are arrange | positioned by the equiangular space | interval in the circumferential direction of the said front end surface of the said boss | hub part.