JP2015202848A - Bracket for attaching motor and motor device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bracket for attaching a motor capable of stably holding a motor while reduction in weight is promoted.SOLUTION: A bracket 11 holds a motor 12 at a base part 20, and is fixed to a vehicle side by bolt fixing parts 21a-23a of respective fixing leg parts 21-23 extending from the base part 20. When viewed along motor attaching direction, first-third thinning holes 31-33 are formed to avoid straight lines Z1-Z3 connecting between vehicle side fixing points Y1-Y3 and motor fixing points X1-X4 corresponding to them.

Description

  The present invention relates to a motor mounting bracket and a vehicle motor device.

  Conventionally, for example, as disclosed in Patent Document 1, a vehicle motor (for example, a wiper motor) is fixed to the vehicle side via a mounting bracket. According to such a configuration, the versatility of the motor is improved because it is possible to cope with various vehicle types having different configurations of the motor mounting portion by changing the shape of the bracket without changing the shape of the motor side. .

JP 2009-298381 A

  The motor mounting bracket as described above needs to be strong enough to stably hold the motor even when subjected to vehicle vibration. Further, in the case of a motor for a rear wiper, it is necessary to have a strength capable of stably holding the motor even when receiving an impact when the back door is closed. For this reason, when weight reduction of the bracket was aimed at, coexistence with ensuring of the intensity | strength of a bracket was a subject.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a motor mounting bracket capable of stably holding a motor while achieving weight reduction. .

  A motor mounting bracket that solves the above problems is a motor mounting bracket that holds a motor and is fixed to the vehicle side, and the motor fixing point and the vehicle at which the motor is fixed when viewed from the direction of assembly of the motor with respect to the bracket. A lightening hole is formed to avoid a straight line connecting a vehicle-side fixing point fixed to the side.

  According to this configuration, when seen from the motor assembly direction, the lightening hole is formed avoiding the straight line connecting the motor fixing point and the vehicle side fixing point fixed to the vehicle side. A non-thickening portion (a portion other than the thinning hole in the bracket) is formed along a straight line connecting the fixed points. For this reason, the load applied to the motor fixing point of the bracket can be linearly acted to suppress and support the local stress concentration. Thereby, even when a heavy load is applied to the motor fixing point such as when the motor is subjected to vehicle vibration, the bracket is hardly deformed and the motor can be stably held. . In this manner, the motor can be stably held while reducing the weight by forming the lightening hole.

  The motor mounting bracket preferably includes a motor fixing portion having a plurality of the motor fixing points and a plurality of fixing leg portions each extending from the motor fixing portion and having the vehicle side fixing points.

According to this configuration, the motor can be stably fixed to the vehicle side.
In the motor mounting bracket, the lightening hole is formed in the fixed leg portion, and the two motors closest to the vehicle-side fixing point and the vehicle-side fixing point when viewed from the mounting direction of the motor. It is preferably formed between the two straight lines connecting the fixed point.

  According to this configuration, it is possible to easily form the lightening hole in the fixed leg portion while avoiding the straight line connecting the motor fixing point and the vehicle side fixing point while reducing the width of the fixed leg portion as much as possible. This can contribute to further weight reduction.

  In the motor mounting bracket, it is preferable that at least a part of the peripheral edge portion of the lightening hole in the bracket formed by punching from a metal plate is provided with a stamped portion that is stamped and formed in the plate thickness direction.

According to this configuration, a reduction in strength can be suppressed by the launching portion while forming a lightening hole to reduce the weight.
In the motor mounting bracket, it is preferable that the projecting portion has a linear portion that forms a straight line parallel to the straight line when viewed from the assembly direction of the motor.

  According to this configuration, since the linear portion of the launching portion is parallel to the straight line connecting the motor fixing point and the vehicle side fixing point, it is a suitable strength reinforcement against the load applied to the motor fixing point. For this reason, it becomes possible to hold | maintain a motor more stably.

A vehicle motor device that solves the above problems includes the motor mounting bracket and a motor fixed to the bracket.
According to this configuration, it is possible to stably hold the motor while reducing the weight by forming a lightening hole in the bracket.

  According to the motor mounting bracket and the vehicle motor device of the present invention, it is possible to stably hold the motor while reducing the weight.

It is a front view of the motor device for vehicles of an embodiment. It is a side view of the motor device for vehicles of the form. It is a rear view of the motor apparatus for vehicles of the same form. FIG. 4 is a sectional view taken along line 4-4 in FIG.

  Hereinafter, an embodiment of the motor mounting bracket will be described. The vehicle motor device of this embodiment is a motor device for driving a rear wiper that is assembled to a back door of a vehicle (not shown).

As shown in FIG. 1, the vehicle motor device according to the present embodiment includes a bracket 11 fixed to the vehicle side and a motor 12 fixed to the bracket 11.
The motor 12 has a motor main body 13 and a speed reduction part 14 integrally assembled. A speed reduction mechanism (not shown) for reducing the rotational drive of the motor main body 13 is provided in the gear housing 15 of the speed reduction part 14. Is housed. In the present embodiment, the speed reduction mechanism includes a worm shaft that is coaxially arranged with the motor body 13 and a worm wheel (not shown) that meshes with the worm shaft. The gear housing 15 includes a worm shaft and a worm wheel. A worm shaft accommodating portion 15a and a wheel accommodating portion 15b are formed, respectively. The worm wheel is connected to a pivot shaft 16 that protrudes from a pivot holder 15 c formed in the gear housing 15, and a rear wiper is attached to the tip of the pivot shaft 16. As a result, the rear wiper is operated by the rotational drive of the motor body 13.

  As shown in FIGS. 1, 2, and 3, the bracket 11 is formed by pressing from a metal plate, and includes a base portion 20 (motor fixing portion) to which the motor 12 is fixed, and a base portion 20. Three extended leg portions (first to third fixed leg portions 21 to 23) are provided.

  The base portion 20 has a planar shape, and the motor 12 is assembled to the base portion 20 in the direction perpendicular to the plate surface (the direction perpendicular to the paper surface in FIGS. 1 and 3). And the base part 20 and the gear housing 15 of the motor 12 are being fixed from the board surface orthogonal direction of the base part 20 with the screw | thread etc. in predetermined four places, and these four fixing points are respectively 1st-4th. Let it be motor fixing points X1 to X4. In the present embodiment, the first motor fixing point X1 is set in the vicinity of the worm shaft accommodating portion 15a, the second and third motor fixing points X2 and X3 are set in the vicinity of the wheel accommodating portion 15b, and the first The 4-motor fixing point X4 is set in the vicinity of the pivot holder 15c (see FIG. 1).

In the present embodiment, the base portion 20 of the bracket 11 is configured to close an opening (not shown) for assembling an internal part formed in the gear housing 15.
The first fixed leg portion 21 extends from the base portion 20 toward the motor main body portion 13 side. Further, the first fixed leg portion 21 is bent from the base portion 20 to the motor main body portion 13 side (projecting side of the pivot shaft 16) and passes through the side of the motor main body portion 13 in the radial direction to the base portion 20 of the motor 12. It extends to the side opposite to the fixed side (see FIG. 2). That is, the distal end portion of the first fixed leg portion 21 is located on the side opposite to the base portion with respect to the motor 12. And the front-end | tip part of the 1st fixed leg part 21 has the bolt fixing | fixed part 21a fastened and fixed with the volt | bolt B1 with respect to the vehicle side.

  As shown in FIGS. 1 and 3, the second fixed leg portion 22 is substantially the same as the first fixed leg portion 21 with respect to the base portion 20 when viewed from the motor assembly direction (the direction perpendicular to the plate surface of the base portion 20). It extends in the opposite direction. Further, the second fixed leg portion 22 is bent toward the motor 12 side (the protruding side of the pivot shaft 16), passes through the radial side of the gear housing 15, and extends to the opposite side of the motor 12. (See FIG. 2). That is, the distal end portion of the second fixed leg portion 22 is located on the side opposite to the base portion with respect to the motor 12, similarly to the distal end portion of the first fixed leg portion 21. And the bolt fixing | fixed part 22a fastened with the volt | bolt B2 with respect to the vehicle side is provided in the front-end | tip part of the 2nd fixing leg part 22. As shown in FIG.

  The third fixed leg portion 23 is formed on the same side as the second fixed leg portion 22 (that is, the side opposite to the first fixed leg portion 21) with respect to the axis L of the motor 12 when viewed from the motor assembly direction. In addition, the extending direction of the third fixed leg portion 23 when viewed from the motor assembly direction is formed so as to be substantially orthogonal to the extending direction of the first fixed leg portion 21. A bolt fixing portion 23 a that is fastened and fixed to the vehicle side by a bolt B <b> 3 is provided at the distal end portion of the third fixed leg portion 23.

  The motor 12 is disposed between the first fixed leg portion 21 and the second fixed leg portion 22. Further, in a state where the bracket 11 is fixed to the vehicle side (hereinafter referred to as an assembled state of the bracket 11), the third fixed leg portion 23 extends in a substantially vertical direction, and the pivot shaft 16 is connected to each bolt fixing portion 21a to 23a. In other words, the assembly posture is positioned above the vertical direction (see FIG. 1). The bolt fixing portion 22a of the second fixed leg portion 22 is located on one side in the axis L direction of the motor 12, and the bolt fixing portion 21a of the first fixed leg portion 21 is in the axis L direction of the motor 12. Located on the other side.

  As shown in FIG. 2, in the assembled state of the bracket 11, the bolt fixing portion 23 a of the third fixed leg portion 23 is located on the lower side in the vertical direction than the motor 12. Further, when viewed from the direction of the axis L of the motor 12, the bolt fixing portion 23 a of the third fixed leg portion 23 is located closer to the base portion 20 than the axis L of the motor 12 (opposite to the protruding side of the pivot shaft 16). The bolt fixing portions 21 a and 22 a of the first and second fixing leg portions 21 and 22 are positioned on the side opposite to the base portion (the protruding side of the pivot shaft 16) from the axis L of the motor 12.

Here, the shape of each of the fixed leg portions 21 to 23 in the motor assembly direction will be described in detail.
As shown in FIG. 3, the first fixed leg portion 21 has a shape in which the width dimension orthogonal to the extending direction becomes narrower toward the distal end portion. Specifically, the first fixed leg portion 21 includes a vehicle-side fixing point Y1 in the bolt fixing portion 21a and two motor fixing points closest to the vehicle-side fixing point Y1 (first and second motor fixing points X1, X2). Is formed in a tapered shape following two straight lines Z1 connecting the two. That is, one end 21b in the width direction of the first fixed leg 21 is parallel to a straight line Z1 connecting the vehicle-side fixing point Y1 and the first motor fixing point X1, and the other in the width direction of the first fixed leg 21. The end 21c is parallel to a straight line Z1 connecting the vehicle-side fixed point Y1 and the second motor fixed point X2. In the present embodiment, the center of the bolt insertion hole (not shown) through which the bolt B1 is inserted in the bolt fixing portion 21a is the vehicle side fixing point Y1.

  Similarly, the second fixed leg portion 22 has a vehicle-side fixing point Y2 (the center of the bolt insertion hole) in the bolt fixing portion 22a and two motor fixing points (third and fourth motors) closest to the vehicle-side fixing point Y2. It has a tapered shape following two straight lines Z2 connecting the fixed points X3 and X4). That is, one end 22b in the width direction of the second fixed leg portion 22 is parallel to a straight line Z2 connecting the vehicle side fixing point Y2 and the third motor fixing point X3, and the other width direction end of the second fixed leg portion 22 is. The end 22c is parallel to a straight line Z2 connecting the vehicle-side fixing point Y2 and the fourth motor fixing point X4.

  Similarly, the third fixed leg portion 23 has a vehicle-side fixing point Y3 (center of the bolt insertion hole) in the bolt fixing portion 23a and two motor fixing points (second and third motors) closest to the vehicle-side fixing point Y3. It has a tapered shape following two straight lines Z3 connecting the fixed points X2, X3). That is, a part of one end 23b in the width direction of the third fixed leg 23 is parallel to a straight line Z3 connecting the vehicle-side fixed point Y3 and the second motor fixed point X2, and the first fixed leg 21 The other end 23c in the width direction is parallel to a straight line Z3 connecting the vehicle-side fixing point Y3 and the third motor fixing point X3.

  The first to third fixed leg portions 21 to 23 are formed with first to third hollow holes 31 to 33, respectively. Each of the hollow holes 31 to 33 is formed when the bracket 11 is punched from a metal plate.

  The first cutout hole 31 is formed by punching into a substantially triangular shape that follows the outer shape of the first fixed leg portion 21 when viewed from the motor assembly direction. Further, the second cutout hole 32 is formed in a substantially triangular shape following the outer shape of the second fixed leg portion 22 as viewed from the motor assembly direction. The third cutout hole 33 is formed by punching in a shape that follows the outer shape of the third fixed leg portion 23 when viewed from the motor assembly direction.

  The peripheral portions of the first to third cutout holes 31 to 33 are provided with punched portions 34 to 36 that are punched and formed so as to protrude in the opening direction (plate thickness direction) of the corresponding cutout holes 31 to 33, respectively. (See FIG. 4). Each punching part 34-36 is formed when the bracket 11 is stamped and formed from a metal plate. Further, when the surface on which the motor 12 is assembled is the surface of the bracket 11, each of the projecting portions 34 to 36 is formed so as to protrude to the back surface side of the bracket 11.

  When viewed from the motor assembling direction, the first cutout hole 31 and the launching portion 34 at the periphery thereof are the vehicle-side fixing point Y1 of the first fixed leg portion 21, the first and second motor fixing points X1, X2, and the like. Between the two straight lines Z1. The first cutout hole 31 has a substantially triangular shape along the two straight lines Z1, and the launch portion 34 has two straight portions 34a that are parallel to the two straight lines Z1, respectively. .

  Similarly, the second cutout hole 32 and the launching portion 35 at the peripheral edge thereof are two connecting the vehicle side fixing point Y2 of the second fixed leg portion 22 and the third and fourth motor fixing points X3, X4. Between the straight lines Z2. The second cutout hole 32 has a substantially triangular shape along the two straight lines Z2, and the launch portion 35 has two straight portions 35a that are parallel to the two straight lines Z2. .

  Further, the third cutout hole 33 and the launching portion 36 at the peripheral edge thereof are two straight lines connecting the vehicle side fixing point Y3 of the third fixed leg portion 23 and the second and third motor fixing points X2 and X3. It is located between Z3. The launching portion 36 has two linear portions 36a that are respectively parallel to the two straight lines Z3.

  As described above, the projecting portions 34 to 36 (linear portions 34a, 35a, 36a) are formed in the first to third fixed leg portions 21 to 23, respectively, so that the width directions of the fixed leg portions 21 to 23 are formed. The cross section along the line forms a step shape (see FIG. 4). For this reason, the cross-sectional strength of each of the fixed leg portions 21 to 23 is improved (the cross-section coefficient is improved and the strength is improved).

  A part of the projecting portion 34 at the peripheral edge of the first cutout hole 31 is formed in a portion bent toward the motor 12 in the first fixed leg portion 21 (see FIG. 2). Similarly, a part of the projecting portion 35 at the peripheral edge of the second cutout hole 32 is formed at a portion of the second fixed leg portion 22 bent toward the motor 12 side. Further, in the present embodiment, the bent shapes of the fixed leg portions 21 to 23 are formed after forming the hollow holes 31 to 33 and the punched portions 34 to 36 by press working or while forming. It has become. In the present embodiment, the end portions 21b, 21c, 22b, 22c, 23b, and 23c in the width direction of the fixed leg portions 21 to 23 are projected shapes that project in the same direction as the corresponding projected portions 34 to 36. Is formed (see FIG. 4).

Next, the operation of this embodiment will be described.
The bracket 11 holds the motor 12 at the base portion 20 and is fixed to the vehicle side by bolt fixing portions 21 a to 23 a of the fixing leg portions 21 to 23 extending from the base portion 20. Thereby, since it becomes possible to cope with various vehicle types with different configurations of the motor mounting portion by changing the shape of each of the fixed leg portions 21 to 23 of the bracket 11 without changing the shape of the motor 12 side, the motor 12 The versatility of is improved.

Next, characteristic effects of the present embodiment will be described.
(1) The first to third cutout holes 31 to 33 formed in the bracket 11 connect the vehicle side fixing points Y1 to Y3 and the corresponding motor fixing points X1 to X4 when viewed from the motor assembly direction. It is provided at a position avoiding the straight lines Z1 to Z3. That is, when viewed from the motor assembly direction, non-thickening portions (parts other than the thinning holes 31 to 33 in the bracket 11) are configured along the straight lines Z1 to Z3. For this reason, the load applied to the motor fixing points X1 to X4 of the bracket 11 can be supported linearly acting toward the vehicle-side fixing points Y1 to Y3 to suppress the local concentration of the stress. . Thereby, even when a large load is applied to the motor fixing points X1 to X4, such as when the vehicle is subjected to vibration or when the back door of the vehicle is closed, the bracket 11 is hardly deformed and the motor 12 is stabilized. Can be held. Thus, it becomes possible to hold | maintain the motor 12 stably, aiming at weight reduction by forming the 1st-3rd lightening holes 31-33.

  (2) Base portion 20 having first to fourth motor fixing points X1 to X4, and first to third fixing leg portions 21 to 23 extending from base portion 20 and having vehicle side fixing points Y1 to Y3, respectively. Is provided. According to this configuration, the motor 12 can be stably fixed to the vehicle side.

  (3) The first to third cutout holes 31 to 33 are formed in the first to third fixed leg portions 21 to 23, respectively, and the vehicle side fixing points Y1 to Y3 as viewed from the motor assembly direction. It is formed between two straight lines Z1 to Z3 connecting the two motor fixing points X1 to X4 closest to the vehicle side fixing points Y1 to Y3. According to this configuration, while reducing the width of each of the fixed leg portions 21 to 23 as much as possible, avoiding the straight lines Z1 to Z3 connecting the motor fixing points X1 to X4 and the vehicle side fixing points Y1 to Y3, the respective hollow holes. 31-33 can be easily formed in each fixed leg 21-23, and it can contribute to the further weight reduction.

  (4) At the peripheral portions of the first to third cutout holes 31 to 33, punched portions 34 to 36 that are punched and formed in the plate thickness direction are respectively provided. According to this configuration, the reduction in strength can be suppressed by the launching portions 34 to 36 while reducing the weight by forming the lightening holes 31 to 33.

  (5) Since the launching portions 34 to 36 have linear portions 34a, 35a, and 36a that are parallel to the straight line when viewed from the motor assembly direction, the launching portions 34 to 36 are subjected to loads applied to the motor fixing points X1 to X4. It becomes suitable strength reinforcement. For this reason, it becomes possible to hold the motor 12 more stably.

  (6) When viewed from the direction of the axis L of the motor 12, the bolt fixing portion 23a of the third fixed leg 23 is located closer to the base 20 than the axis L of the motor 12, and the first and second fixed legs The bolt fixing portions 21 a and 22 a of the portions 21 and 22 are located on the side opposite to the base portion from the axis L of the motor 12. Thereby, it becomes the structure which hold | maintains the motor 12 which is a heavy article on both sides across the axis L, and can hold | maintain more stably.

  (7) The first fixed leg 21 has a common vehicle-side fixing point Y1 for the two motor fixing points X1 and X2, and the first cutout hole 31 is in the region of the plane P1 connecting the three points. Is formed. Similarly, the second fixed leg portion 22 has a common vehicle side fixing point Y2 for the two motor fixing points X3 and X4, and the second cutout hole 32 is provided in the region of the plane P2 connecting the three points. Is formed. Similarly, the third fixed leg portion 23 has a common vehicle-side fixing point Y3 for the two motor fixing points X2 and X3, and the third cutout hole 33 is provided in the region of the plane P3 connecting the three points. Is formed. According to this configuration, it is possible to configure triangular surfaces P1 to P3 that connect the vehicle-side fixed points Y1 to Y3 and the two motor fixed points X1 to X4 corresponding to the vehicle-side fixed points Y1 to Y3, respectively. By forming the first through third cutout holes 31 to 33 in the region of ~ P3, it is possible to reduce the weight while securing the rigidity of the bracket 11.

In addition, you may change the said embodiment as follows.
-In the said embodiment, although the 1st-3rd lightening holes 31-33 were formed between each of the straight lines Z1-Z3 set 2 each, it is not specifically limited to this, A motor It is only necessary that the lightening holes 31 to 33 are formed at positions avoiding the straight lines Z1 to Z3 when viewed from the assembling direction.

  In the above embodiment, the punched portions 34 to 36 are formed on the entire peripheral edge of each of the hollow holes 31 to 33. However, for example, the punched portions 34 to 36 are formed only by the linear portions 34a, 35a, and 36a. It may be configured.

  -Structures, such as a shape of each hollow hole 31-33, are not limited to the said embodiment. For example, in the above-described embodiment, the lightening holes 31 to 33 are formed one by one in the one fixed leg portion 21 to 23, but a plurality of lightening holes are formed in one fixed leg portion 21 to 23. Good.

-The number of the fixed leg parts 21-23 is not limited to three like the said embodiment, For example, it is good also as two or four or more.
In the above embodiment, the present invention is applied to the motor device for driving the rear wiper of the vehicle. However, the present invention is not particularly limited thereto, and may be applied to other vehicle motor devices.

Next, a technical idea that can be grasped from the above embodiment and another example will be added below.
(A) In the motor mounting bracket according to any one of claims 3 to 5, which is dependent on claim 2,
The motor mounting bracket, wherein the hollow hole is formed in a triangular surface area connecting the vehicle-side fixing point and the two motor fixing points of the fixed leg portion.

  According to this configuration, a triangular surface connecting the vehicle-side fixing point and the two motor fixing points can be formed on the fixing leg, and the bracket hole can be formed by forming a hollow hole in the triangular region. It is possible to reduce the weight while securing the rigidity.

  DESCRIPTION OF SYMBOLS 11 ... Bracket, 12 ... Motor, 20 ... Base part (motor fixing part), 21-23 ... 1st-3rd fixing leg part, 31-33 ... 1st-3rd hollow hole, 34-36 ... Launching part , 34a, 35a, 36a ... linear portions, X1-X4 ... first to fourth motor fixing points, Y1-Y3 ... vehicle side fixing points.

Claims (6)

A motor mounting bracket that holds the motor and is fixed to the vehicle side,
As seen from the mounting direction of the motor with respect to the bracket, the lightening hole is formed avoiding a straight line connecting the motor fixing point to which the motor is fixed and the vehicle side fixing point to be fixed to the vehicle side. Motor mounting bracket. The motor mounting bracket according to claim 1,
A motor fixing portion having a plurality of the motor fixing points;
A motor mounting bracket, comprising: a plurality of fixed leg portions extending from the motor fixing portion and each having the vehicle side fixing point. The motor mounting bracket according to claim 2,
The lightening holes are formed in the fixed leg portion and connect two of the vehicle-side fixing point and the two motor fixing points closest to the vehicle-side fixing point when viewed from the motor assembly direction. A bracket for mounting a motor, wherein the bracket is formed between the straight lines. The motor mounting bracket according to any one of claims 1 to 3,
A bracket for mounting a motor, wherein a punched portion formed by punching in the thickness direction is provided at least at a part of a peripheral edge portion of the cutout hole in the bracket formed by punching from a metal plate. The motor mounting bracket according to claim 4,
The bracket for mounting a motor, wherein the projecting portion has a linear portion that is parallel to the straight line when viewed from the assembly direction of the motor.   A vehicle motor device comprising the motor mounting bracket according to any one of claims 1 to 5 and a motor fixed to the bracket.