JP2017193326A - Wiper motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper motor capable of suppressing vibration. SOLUTION: A wiper motor M rotates a rotating shaft 27, and rotates a rotating shaft 27, which is housed in a motor main body 21, a gear housing 26 fixed to a motor case 23 of the motor main body 21, and the gear housing 26. A worm 28 for decelerating and a deceleration portion 22 having a worm wheel 29 are provided, and the gear housing 26 is provided with a vehicle body support portion 37 that can be supported on the vehicle body via a vibration-proof rubber cap 36. The gear housing 26 is fixed to a fixed bearing accommodating portion 34 that is fixed to the motor case 23 and accommodates a bearing 33 that supports a rotating shaft 27 protruding from the motor case 23, and a motor case 23 of the fixed bearing accommodating portion 34 is fixed to the gear housing 26. It has a worm 28 and a gear accommodating portion 35 for accommodating the worm wheel 29, which are provided on the opposite side of the side. The vehicle body support portion 37 is provided in the fixed bearing accommodating portion 34. [Selection diagram] Fig. 2

Description

  The present invention relates to a wiper motor.

  Conventionally, a vehicle has been provided with a wiper motor as power for wiping a wiping surface such as a windshield with a wiper. The wiper motor includes a motor body that rotationally drives the rotating shaft, a gear housing that is fixed to the motor case of the motor body, and a speed reducing portion that is housed in the gear housing and has a speed reducing mechanism that reduces the rotation of the rotating shaft. Some are provided (see, for example, Patent Document 1). In this wiper motor, a gear housing is fixed to a rod-shaped member, pivot holders fixed to both ends of the rod-shaped member are fixed to the vehicle body, and a vehicle body support portion provided on the gear housing is a vibration-proof (rubber) member. It is fixed to the vehicle body by being supported by the vehicle body via.

JP 2005-153772 A

  By the way, the gear housing of the wiper motor as described above includes a fixed bearing accommodating portion that accommodates a bearing that supports a rotating shaft that is fixed to the motor case and protrudes from the motor case, a rotating shaft that projects from the fixed bearing accommodating portion, and a speed reduction gear. The vehicle body support portion is provided so as to protrude from the gear housing portion. In such a configuration, the distance from the bearing that receives the vibration of the rotating shaft to the vehicle body support (vibration isolation member) is increased, and the vibration of the rotation shaft is not easily absorbed by the vibration isolation member. There was a problem that it was easy to do.

  The present invention has been made to solve the above problems, and an object thereof is to provide a wiper motor capable of suppressing vibration.

  A wiper motor that solves the above problems includes a motor body that rotationally drives a rotating shaft, a gear housing that is fixed to a motor case of the motor body, and a speed reduction mechanism that is housed in the gear housing and decelerates the rotation of the rotating shaft. A wiper motor provided with a vehicle body support portion that can be supported by the vehicle body via a vibration isolating member, wherein the gear housing is fixed to the motor case. A fixed bearing accommodating portion that accommodates a bearing that supports the rotating shaft that protrudes from the shaft, and a gear accommodating portion that is provided on the opposite side of the fixed bearing accommodating portion to the side on which the motor case is fixed and accommodates the speed reduction mechanism. The vehicle body support portion is provided in the fixed bearing housing portion.

  According to this configuration, the vehicle body support portion that can be supported by the vehicle body via the vibration isolation member is provided in the fixed bearing housing portion that houses the bearing that supports the rotating shaft that is fixed to the motor case and protrudes from the motor case. For example, the distance from the bearing to the vibration isolator can be made shorter than when the vehicle body support is provided in the gear housing, and the vibration of the rotating shaft can be easily absorbed by the vibration isolator.

In the wiper motor, it is preferable that the vehicle body support portion is provided at a position overlapping an axial range of the bearing.
According to this configuration, since the vehicle body support portion is provided at a position that overlaps the axial range of the bearing, the rotation shaft is compared with a case where the vehicle body support portion is provided at a position that does not overlap the axial range of the bearing. The vibration of the (bearing) can be more easily absorbed by the vibration isolating member.

  In the wiper motor, the speed reduction part has an output shaft protruding from the gear housing, and the vehicle body support part has a flat surface parallel to a plane including the axis of the output shaft. preferable.

  According to this configuration, the speed reduction portion has the output shaft protruding from the gear housing, and the vehicle body support portion has a shape having a flat surface parallel to the plane including the axis of the output shaft. Thus, the mold structure can be simplified when the gear housing including the vehicle body support portion is molded. That is, the gear housing requires a hole for projecting the output shaft to the outside, and the mold housing is easier to mold when the release direction is along the axis of the output shaft. And since the flat surface of a vehicle body support part is parallel to the plane containing the axis line (mold release direction) of an output shaft, it can shape | mold easily even if it does not make a mold structure complicated.

In the wiper motor, it is preferable that the vehicle body support portion is provided so as to extend in a radial direction around the rotation axis when viewed from the axial direction of the rotation axis.
According to this configuration, the vehicle body support portion is provided to extend in a radial direction centered on the rotation shaft when viewed from the axial direction of the rotation shaft, so that vibration of the rotation shaft can be more effectively absorbed. Can do.

  In the wiper motor, the speed reduction mechanism is a worm that rotates integrally with the rotation shaft, and a worm wheel that meshes with the worm and rotates an output shaft. A crank arm is fixed to the output shaft, and the vehicle body The support portion is preferably provided outside the movement locus range of the crank arm as viewed from the axial direction of the output shaft.

  According to this configuration, since the vehicle body support portion is provided outside the range of movement of the crank arm as viewed from the axial direction of the output shaft, when the vehicle body support portion is supported on the vehicle body via the vibration isolation member, the crank is supported. The arm becomes difficult to get in the way, and the degree of freedom of attachment increases.

  In the wiper motor, the speed reduction mechanism is a worm that rotates integrally with the rotation shaft, and a worm wheel that meshes with the worm and rotates an output shaft. The gear housing is fixed to the vehicle body. A pair of rod-shaped member fixing portions for fixing to the rod-shaped member is provided, and the vehicle body support portion is within a triangular range formed by the pair of rod-shaped member fixing portions when viewed from the axial direction of the output shaft. It is preferable that the center of gravity is provided so as to be arranged.

  According to this configuration, the vehicle body support portion is provided so that the entire center of gravity position is disposed within a triangular range formed by the pair of rod-shaped member fixing portions when viewed from the axial direction of the output shaft. The wiper motor can be stably supported at three points.

  In the wiper motor, a flange portion extending radially outward is provided at an end of the motor case on the gear housing side, and extending radially outward on the motor case side of the fixed bearing housing portion. It is preferable that an outwardly extending part to be in contact with the flange part is provided, and the vehicle body support part is protruded so that a part thereof is supported by the outwardly extending part.

  According to this configuration, the motor case side of the fixed bearing housing portion is provided with the outer extending portion that extends radially outward and comes into contact with the flange portion of the motor case. Since it projects so that it may be supported by a part, the function to support a vehicle body support part can be given to the outward extension part for making it contact | abut with a flange part. Therefore, for example, the structure of the gear housing can be simplified as compared with a case where a rib for supporting the vehicle body support portion is separately provided.

  In the wiper motor of the present invention, vibration can be suppressed.

The perspective view of the wiper unit in one embodiment. The top view of the wiper motor in one embodiment. A side view of a gear housing etc. in one embodiment. The bottom view of the gear housing in one Embodiment. The side view of the gear housing etc. in another example. The side view of the gear housing etc. in another example. The top view of the wiper motor in another example. The top view of the wiper motor in another example. Explanatory drawing for demonstrating the attachment structure of the wiper motor in another example.

Hereinafter, an embodiment of a wiper unit for a vehicle will be described with reference to FIGS.
As shown in FIG. 1, the wiper unit includes two pivot holders 11, a frame member 12 as a rod-shaped member, a wiper motor M, and two link rods R1 and R2.

  A wiper motor M is fixed to the middle portion of the frame member 12 in the longitudinal direction, and pivot holders 11 are fixed to both ends of the frame member 12 by caulking or the like. The pivot holder 11 has a holder body fixing portion 11a and rotatably supports a pivot shaft 13 to which a wiper (not shown) is connected to the tip end portion. The holder body fixing portion 11 a has a fixing hole that penetrates in a direction substantially parallel to the axial direction of the pivot shaft 13, and an anti-vibration rubber ring 14 is fitted into the fixing hole, and passes through the anti-vibration rubber ring 14. It is fixed with respect to the vehicle body by a bolt or the like. In addition, a distal end portion of a pivot lever 13a extending in a direction perpendicular to the axis is fixed to the base end portion of each pivot shaft 13.

  As shown in FIG. 2, the wiper motor M includes a motor body 21 and a speed reduction unit 22. The motor body 21 has a substantially bottomed cylindrical motor case (yoke) 23, a permanent magnet 24 fixed to the inner peripheral surface of the motor case 23, and a rotary shaft 27 fixed to the motor case 23 so as to be rotatable. The rotor (armature) 25 and the commutator C fixed to the rotating shaft 27 are rotated, and the rotor 25 is rotationally driven when a drive current from an external power source is supplied via the commutator C. The speed reduction unit 22 includes a metal gear housing 26 fixed to the motor case 23, a worm 28 and a worm wheel 29 that are housed in the gear housing 26 and decelerate the rotation of the rotary shaft 27 of the rotor 25, and a worm. An output shaft 30 is provided to rotate integrally with the wheel 29 and protrudes from the gear housing 26. In this embodiment, the worm 28 and the worm wheel 29 engaged with the worm 28 constitute a speed reduction mechanism, and the worm 28 is formed integrally with the rotary shaft 27 so as to rotate integrally with the rotary shaft 27. Alternatively, it is coaxially connected to the rotating shaft 27 (the axis L2 of the rotating shaft 27). A base end portion of a flat crank arm 31 is fixed to the distal end portion of the output shaft 30.

  The gear housing 26 is a pair of rod-like members on the side opposite to the side where the worm 28 is provided (the lower side in FIG. 2) with respect to the output shaft 30 when viewed from the axial direction (axis line L1 direction) of the output shaft 30. It has the attachment leg 32 as a fixing | fixed part. As shown in FIG. 1, the gear housing 26 has a pair of mounting legs 32 fastened and fixed to intermediate portions in the longitudinal direction of the frame member 12 by bolts or the like (not shown).

  As shown in FIG. 1, the base end of the link rod R1 is rotatably connected to the tip of the crank arm 31, and one end (right side in FIG. 1) is connected to the tip of the link rod R1. ) Of the pivot lever 13a on the side of the pivot holder 11 is rotatably connected. Further, the base end portions of both pivot levers 13a are connected by a link rod R2. Thereby, both pivot levers 13a are driven (oscillated) in synchronization.

  Here, as shown in FIG. 2, the gear housing 26 is fixed to the motor case 23 and includes a fixed bearing housing portion 34 that houses a bearing 33 that supports the rotating shaft 27 that protrudes from the motor case 23, and a fixed bearing housing portion 34. And a gear housing portion 35 for housing the worm 28 and the worm wheel 29 provided on the opposite side (left side in FIG. 2) to the side to which the motor case 23 is fixed. The fixed bearing housing portion 34 of the gear housing 26 is integrally provided with a vehicle body support portion 37 that can be supported by the vehicle body via a vibration isolation rubber cap 36 as a vibration isolation member.

  Specifically, first, a flange portion 23a extending radially outward is provided at the end of the motor case 23 on the gear housing 26 side. Further, the fixed bearing housing portion 34 of the gear housing 26 is formed in a cylindrical shape having substantially the same diameter as the motor case 23, and extends radially outward on the motor case 23 side to be in contact with the flange portion 23a. An extended portion 34a is provided. And the part (2 places in this embodiment) of the circumferential direction of the flange part 23a and the extension part 34a is provided with the site | part which protruded largely on the radial direction outer side, and these site | parts are fastened and fixed with the screw which is not shown in figure. Thus, the motor case 23 and the gear housing 26 are fixed.

  The vehicle body support portion 37 is viewed from the axial direction of the output shaft 30 so as to be supported by a part of the extended portion 34a and a rib 34b provided on the outer peripheral surface of the fixed bearing housing portion 34. It protrudes from the rotating shaft 27 (worm 28) so as to extend on the opposite side (upper side in FIG. 2) from the side where the worm wheel 29 is provided. Specifically, as shown in FIG. 3, when viewed from the axial direction of the rotary shaft 27, the vehicle body support portion 37 has a center line X on a line α where the axis L <b> 1 of the output shaft 30 and the axis L <b> 2 of the rotary shaft 27 are orthogonal to each other. Is arranged so as to be arranged. In other words, when viewed from the axial direction of the rotating shaft 27, the vehicle body support portion 37 protrudes so that the center line X is orthogonal to the axis L 1 of the output shaft 30 and orthogonal to the axis L 2 of the rotating shaft 27. . In other words, the vehicle body support portion 37 is provided so as to extend in the radial direction (radial direction) centered on the rotation shaft 27 (its axis L2) when viewed from the axial direction of the rotation shaft 27. Further, when viewed from the axial direction of the rotary shaft 27, the vehicle body support portion 37 has its center line X parallel to the mounting axis of the mounting leg 32 (the axis in the fastening direction fastened to the frame member 12) L3. Projected. As shown in FIGS. 2 and 3, the vehicle body support portion 37 has a substantially disk-shaped base portion 37 a supported by a part of the outer extension portion 34 a and the rib 34 b, and a reduced diameter extending gradually from the base portion 37 a. It has the part 37b and the axial part 37c extended in a substantially cylindrical shape from the front-end | tip part of this diameter-reduced part 37b. The base 37a has a flat support surface 37d whose end surface on the side where the reduced diameter portion 37b is formed receives the end surface of the anti-vibration rubber cap 36 (determines the position of the end surface of the anti-vibration rubber cap 36). Yes. In other words, the base portion 37a has a flat support surface 37d that receives the end surface of the anti-vibration rubber cap 36, and a reduced diameter portion 37b is formed (standing) from the center of the support surface 37d. The support surface 37d forms a flat surface parallel to a plane including the axis L1 of the output shaft 30 (not intersecting the axis L1). The support surface 37d is formed in parallel with a plane including the axis L2 of the rotation shaft 27. As shown in FIG. 2, the vehicle body support portion 37 of the present embodiment is provided at a position that overlaps (partly) the axial range Y in which the bearing 33 is disposed, and is provided on the radially outer side of the bearing 33. Yes. Further, the vehicle body support portion 37 of the present embodiment is provided outside the movement locus range H of the crank arm 31 when viewed from the axial direction of the output shaft 30 (see FIG. 2). In the vehicle body support portion 37 of the present embodiment, the center of gravity Z of the wiper motor M is disposed within a triangular range S1 formed by the pair of mounting legs 32 when viewed from the axial direction of the output shaft 30. (See FIGS. 1 and 2). In the vehicle body support portion 37 of the present embodiment, the output shaft 30 (its axis L1) is disposed within a triangular range S1 formed by the pair of mounting legs 32 when viewed from the axial direction of the output shaft 30. Also provided. In the vehicle body support portion 37 of the present embodiment, the center of gravity position Z of the wiper motor M is disposed within a triangular range S2 formed by the pair of holder vehicle body fixing portions 11a when viewed from the axial direction of the output shaft 30. (See FIG. 1).

  An anti-vibration rubber cap 36 is externally fitted and fixed to the vehicle body support portion 37. The anti-vibration rubber cap 36 is formed in a substantially cylindrical shape, and has a constricted portion 36a having a small diameter at an intermediate portion in the axial direction. In the wiper motor M, the pair of mounting legs 32 is fixed to the frame member 12 fixed to the vehicle body as described above (see FIG. 1), and the wiper motor support portion 38 ( 2), the constricted portion 36a of the anti-vibration rubber cap 36 is fitted into the vehicle body. More specifically, the constricted portion 36a of the anti-vibration rubber cap 36 fixed to the vehicle body support portion 37 is fitted to the wiper motor support portion 38 from the upper side to the lower side of the vehicle body (from the front side to the back side in FIG. 2). . At this time, the wiper motor support portion 38 has a U-shape that opens to the upper side of the vehicle body. Further, the constricted portion 36a of the anti-vibration rubber cap 36 is axially above the flange portion 23a and the outwardly extending portion 34a (on the upper side in FIG. 2, and the distal end portion of the flange portion 23a and the outwardly extending portion 34a (radially outer end portion). ). Further, the anti-vibration rubber cap 36 has a portion on the support surface 37d side (larger outside diameter that is not constricted) than the constricted portion 36a in a direction in which the vehicle body support portion 37 extends to the support surface 37d and the wiper motor support portion 38. It is in a state of being sandwiched along.

Next, the operation of the wiper unit configured as described above will be described.
For example, when a wiper switch provided in the driver's seat is operated, a drive current is supplied to the motor main body 21, and the rotor 25 (rotary shaft 27) is rotationally driven. Then, the rotation of the rotating shaft 27 is decelerated by the worm 28 and the worm wheel 29, and the output shaft 30 and the crank arm 31 are rotationally driven. Then, the power is transmitted to one pivot lever 13a via the link rod R1, and is also transmitted to the other pivot lever 13a by the link rod R2. Then, the wiper fixed to each pivot shaft 13 reciprocally swings synchronously, and the reciprocating wiping operation is performed.

Next, the characteristic effects of the above embodiment will be described below.
(1) A vehicle body support portion 37 that is provided in the gear housing 26 and can be supported on the vehicle body via a vibration isolating rubber cap 36 is fixed to the motor case 23 and supports a rotating shaft 27 that protrudes from the motor case 23. Is provided in a fixed bearing accommodating portion 34 that accommodates. Therefore, for example, the distance from the bearing 33 to the anti-vibration rubber cap 36 can be shortened compared to the case where the vehicle body support portion 37 is provided in the gear housing portion 35 of the gear housing 26, and the vibration of the rotating shaft 27 is applied to the anti-vibration rubber cap 36. Can be absorbed easily. Therefore, it is possible to suppress the wiper motor M from vibrating (resonating). Further, since the vehicle body support portion 37 is not provided in the gear housing portion 35 of the gear housing 26, as shown schematically in FIG. 4, the cover member 40 for closing the opening of the gear housing portion 35 is fixed. It is possible to freely provide the snap fit portion 41 regardless of the vehicle body support portion 37.

  (2) Since the vehicle body support portion 37 is provided at a position where a part thereof overlaps the axial range Y of the bearing 33, the vehicle body support portion 37 does not overlap the axial range Y of the bearing 33 (the axial direction of the rotary shaft 27. The vibration isolating rubber cap 36 can more easily absorb the vibration of the rotating shaft 27 (bearing 33) compared to the case where it is provided at a position deviated from the position shown in FIG.

  (3) Since the vehicle body support portion 37 has a shape having a support surface 37d that is a flat surface parallel to the plane including the axis L1 of the output shaft 30, the gear housing 26 including the vehicle body support portion 37 is formed by casting, for example. In the case of molding, the mold structure can be simplified. That is, the gear housing 26 needs a hole for projecting the output shaft 30 to the outside, and the mold housing is easier to mold when the release direction is along the axis L1 of the output shaft 30. Since the support surface 37d of the vehicle body support portion 37 is parallel to a plane including the axis L1 (release direction) of the output shaft 30, it can be easily molded without complicating the mold structure.

  (4) Since the vehicle body support portion 37 is provided to extend in the radial direction around the rotation shaft 27 when viewed from the axial direction of the rotation shaft 27, the vibration of the rotation shaft 27 is more easily absorbed. be able to.

  (5) Since the vehicle body support portion 37 is provided outside the movement locus range H of the crank arm 31 when viewed from the axial direction of the output shaft 30, the vehicle body support portion 37 is supported on the vehicle body via the anti-vibration rubber cap 36. When doing so, the crank arm 31 does not easily get in the way, and the degree of freedom of attachment increases.

  (6) The vehicle body support portion 37 is provided such that the center of gravity Z of the wiper motor M is disposed within a triangular range S1 formed by the pair of mounting legs 32 when viewed from the axial direction of the output shaft 30. Therefore, the wiper motor M can be stably supported at three points.

  (7) On the motor case 23 side of the fixed bearing housing portion 34, an outwardly extending portion 34a that extends radially outward and contacts the flange portion 23a of the motor case 23 is provided. Is protruded so as to be supported by a part of the extended portion 34a. Therefore, it is possible to provide a function of supporting the vehicle body support portion 37 to the outer extension portion 34a for contacting the flange portion 23a. Accordingly, for example, the configuration of the gear housing 26 can be simplified as compared with a case where a rib for supporting the vehicle body support portion 37 is provided separately (in addition to the rib 34b).

  (8) The vehicle body support portion 37 is provided with an anti-vibration rubber cap 36 which is fitted and fixed, and the constricted portion 36a of the anti-vibration rubber cap 36 is axially above the flange portion 23a and the outer extension portion 34a (flange). It arrange | positions at the front-end | tip part (radial direction outer side edge part) of the part 23a and the extension part 34a. Therefore, when the vehicle body support portion 37 is supported on the vehicle body via the vibration isolating rubber cap 36, the flange portion 23a (the motor yoke 23) and the extension portion 34a (the fixed bearing housing portion 34) are not easily obstructed, and the degree of freedom of attachment is increased. Becomes larger. In other words, the wiper motor support portion 38 and the vehicle body support portion 37 can be attached from various directions in the radial direction of the constricted portion 36a.

  (9) When viewed from the axial direction of the output shaft 30, the vehicle body support portion 37 is arranged such that the entire center of gravity position Z of the wiper motor M is disposed within a triangular range S2 formed by the pair of holder vehicle body fixing portions 11a. Therefore, the wiper motor M and the like can be dispersed and supported also in support portions (a pair of holder vehicle body fixing portions 11a) other than the vehicle body support portion 37. Further, the force acting on the vehicle body support portion 37 can be reduced.

The above embodiment may be modified as follows.
In the above embodiment, the vehicle body support portion 37 is provided at a position where a part thereof overlaps the axial range Y of the bearing 33. However, the vehicle body support portion 37 is provided at the fixed bearing housing portion 34 that is fixed to the motor case 23 and accommodates the bearing 33. If possible, the bearing 33 may be provided at a position that does not overlap with the axial range Y of the bearing 33 (a position shifted in the axial direction of the rotary shaft 27). For example, the vehicle body support portion may be provided in a range (in the axial direction of the rotating shaft 27) between the end of the gear housing 26 on the motor case 23 side and the end of the bearing 33 on the motor case 23 side. In this case, the vehicle body support portion 37 is provided with a commutator C (or a brush (not shown) that supplies current to the rotor 25 by sliding contact with the commutator C) at least partially disposed in the fixed bearing housing portion 34. It is provided on the radially outer side of a brush holder (not shown) provided with a brush accommodating portion (not shown) for accommodating. Thereby, the vibration of the brush and the commutator C can also be efficiently absorbed. Further, for example, the anti-vibration rubber cap 36 may be provided at a position overlapping the axial range Y of the bearing 33 while the vehicle body support portion 37 is provided at a position not overlapping the axial range Y of the bearing 33. . Even in this case, the vibration of the rotating shaft 27 (bearing 33) is absorbed more than the configuration in which the vibration-proof rubber cap 36 (vibration-proofing member) is provided at a position where it does not overlap the axial range Y of the bearing 33. Can be made easier. Further, the vehicle body support portion 37 and the vibration isolating rubber cap 36 may be provided at positions that do not overlap with the axial range Y of the bearing 33.

  In the above embodiment, the vehicle body support portion 37 is provided outside the movement locus range H of the crank arm 31 when viewed from the axial direction of the output shaft 30, but is not limited thereto, and the axial direction of the output shaft 30 is not limited thereto. When viewed from the above, a configuration may be adopted in which (at least a part of) is provided within the movement locus range H of the crank arm 31.

  In the above-described embodiment, the vehicle body support portion 37 has the entire center of gravity position Z of the wiper motor M within the triangular range S1 formed by the pair of mounting legs 32 when viewed from the axial direction of the output shaft 30. However, the present invention is not limited to this, and the entire center of gravity position Z of the wiper motor M may be disposed within the triangular range S1. Further, in the above-described embodiment, the vehicle body support portion 37 has the center of gravity position Z of the wiper motor M within the triangular range S2 formed with the pair of holder vehicle body fixing portions 11a when viewed from the axial direction of the output shaft 30. However, the present invention is not limited to this, and the entire center of gravity position Z of the wiper motor M may be disposed within the triangular range S2. In addition, the vehicle body support portion may be provided so that the entire center of gravity position Z of the wiper motor M is disposed in one of the triangular range S1 and the triangular range S2.

  In the above embodiment, the vehicle body support part 37 is projected so that a part thereof is supported by a part of the extension part 34a. However, the present invention is not limited to this, and is not supported by the extension part 34a. It may be provided (at a position deviated from the extended portion 34a).

  In the above embodiment, when the center line X of the vehicle body support portion 37 is disposed on the line α where the axis L1 of the output shaft 30 and the axis L2 of the rotation shaft 27 are orthogonal to each other when viewed from the axial direction of the rotation shaft 27. However, it is not limited to this. For example, as shown in FIG. 5, when viewed from the axial direction of the rotary shaft 27, the center line X of the vehicle body support portion 137 is output from a line α where the axis L1 of the output shaft 30 and the axis L2 of the rotary shaft 27 are orthogonal to each other. It may be arranged to be shifted to the crank arm 31 side (right side in FIG. 5) along the axis L1 of the shaft 30 (while being orthogonal to the axis L1). Further, the vehicle body support portion 137 may be arranged such that the support surface 137d of the base portion 137a is orthogonal to a line α where the axis L1 of the output shaft 30 and the axis L2 of the rotary shaft 27 are orthogonal.

  Further, as shown in FIG. 6, when viewed from the axial direction of the rotating shaft 27, the axis L2 of the rotating shaft 27 is centered on the line α where the axis L1 of the output shaft 30 and the axis L2 of the rotating shaft 27 are orthogonal to each other. The center line X of the vehicle body support portion 237 may be shifted (rotated) by a predetermined angle (an angle determined by the wiper motor support portion) θ in the circumferential direction. Further, when viewed from the axial direction of the rotary shaft 27, a predetermined angle θ in the circumferential direction about the axis L2 of the rotary shaft 27 with respect to a line α where the axis L1 of the output shaft 30 and the axis L2 of the rotary shaft 27 are orthogonal to each other. The vehicle body support portion 237 may be arranged so that the shifted line (that is, the center line X of the vehicle body support portion 237) and the support surface 237d of the base portion 237a are orthogonal to each other.

  In the above embodiment, the wiper motor support portion 38 has a U shape that opens to the upper side of the vehicle body. However, the invention is not limited thereto, and the U motor opens in a direction perpendicular to the vertical direction of the vehicle body. It may have a letter shape.

  In the above embodiment, the anti-vibration rubber cap 36 (anti-vibration member) is fixed to the vehicle body support portion 37, and the anti-vibration rubber cap 36 is attached to the wiper motor support portion 38 (see FIG. 2) provided on the body of the vehicle body. Although it is configured to be supported, the vehicle body support portion 37 may be changed to another configuration as long as it is configured to be supported with respect to the vehicle body via the vibration isolation member. For example, conversely, a vibration isolation member may be fixed in advance to the body side of the vehicle body, and a vehicle body support portion provided in the gear housing 26 may be supported by the vibration isolation member.

  Further, as shown in FIG. 7, the vehicle body support portion 51 provided in the fixed bearing housing portion 34 is a U-shaped support portion having an opening, and the wiper motor support portion 52 provided in the body of the vehicle body is used as a vibration-proof rubber cap. It is good also as a substantially cylindrical support part to which 36 (vibration-proof member) is fitted and fixed. FIG. 7 shows a state before the vehicle body support portion 51 is assembled to the wiper motor support portion 52 (anti-vibration rubber cap 36). With respect to the wiper motor support portion 52 to which the anti-vibration rubber cap 36 is fixed. The wiper motor M is assembled (supported) by sliding the vehicle body support portion 51 of the wiper motor M (moving to the left in FIG. 7).

  Further, as shown in FIGS. 8 and 9, a support portion fixed in advance so that a substantially cylindrical vibration isolating member 62 is sandwiched between a vehicle body support portion 61 extending in a radial direction from the fixed bearing housing portion 34. The wiper motor support 63 provided on the body of the vehicle body may be a pin-shaped support that is inserted into the vibration isolation member 62. At this time, the wiper motor support 63 is inserted into the vibration isolating member 62 of the vehicle body support 61 so that the wiper motor M is supported.

  In the above embodiment, the vehicle body support portion 37 is formed integrally with the gear housing 26. However, the present invention is not limited to this, and the vehicle body support portion is formed separately from the gear housing. May be fixed to the fixed bearing housing portion by press fitting or screws.

In the above embodiment, the wiper motor M is a motor with a brush, but is not limited to this, and may be a brushless motor.
The technical idea that can be grasped from the above embodiment will be described below.

  (A) a motor main body that rotationally drives the rotation shaft, a gear housing fixed to the motor case of the motor main body, and a speed reduction portion that is housed in the gear housing and has a speed reduction mechanism that decelerates the rotation of the rotation shaft; A wiper motor provided with a vehicle body support portion that can be supported on the vehicle body via a vibration isolating member, wherein the speed reduction mechanism is meshed with the worm and the worm that rotate integrally with the rotation shaft. A worm wheel that rotates the output shaft, and a crank arm is fixed to the output shaft, and the vehicle body support portion is provided outside the movement locus range of the crank arm when viewed from the axial direction of the output shaft. A wiper motor characterized by that.

  According to this configuration, the vehicle body support portion provided in the gear housing is provided outside the range of movement of the crank arm as viewed from the axial direction of the output shaft, so the vehicle body support portion is attached to the vehicle body via the vibration isolation member. When it is supported, the crank arm is less likely to get in the way, and the degree of freedom of attachment can be increased. That is, in the conventional configuration in which the vehicle body support portion is provided within the range of movement of the crank arm as viewed from the axial direction of the output shaft, the mounting structure (the support portion on the vehicle body side is taken into consideration). There is a problem that the degree of freedom of attachment is small and the degree of freedom of attachment can be solved, and the degree of freedom of attachment can be increased.

(B) a motor main body that rotationally drives the rotation shaft, a gear housing fixed to the motor case of the motor main body, and a speed reduction portion that is housed in the gear housing and has a speed reduction mechanism that decelerates the rotation of the rotation shaft; A wiper motor, wherein the gear housing is provided with a vehicle body support portion that can be supported on the vehicle body via a vibration isolation member,
The speed reduction mechanism is a worm that rotates integrally with the rotating shaft, and a worm wheel that meshes with the worm and rotates an output shaft. The gear housing is fixed to a rod-like member that is fixed to the vehicle body. A pair of rod-shaped member fixing portions are provided, and the vehicle body support portion is located at the center of gravity within a range of a triangle formed by the pair of rod-shaped member fixing portions when viewed from the axial direction of the output shaft. A wiper motor characterized by being provided as described above.

  According to this configuration, the vehicle body support portion is provided so that the entire center of gravity position is disposed within a triangular range formed by the pair of rod-shaped member fixing portions when viewed from the axial direction of the output shaft. The wiper motor can be stably supported at three points. That is, when the vehicle body support portion is provided so that the entire center of gravity is disposed outside the range of the triangle formed by the pair of rod-like member fixing portions when viewed from the axial direction of the output shaft, the wiper motor is supported. There is a problem that a large force is likely to be applied locally to any one of the three points, but this can be solved and the three points can be supported stably.

  DESCRIPTION OF SYMBOLS 12 ... Frame member (bar-shaped member), 21 ... Motor main body, 22 ... Reduction part, 23 ... Motor case, 23a ... Flange part, 26 ... Gear housing, 27 ... Rotating shaft, 28 ... Worm which comprises a part of reduction mechanism , 29 ... Worm wheel constituting a part of the speed reduction mechanism, 30 ... Output shaft, 31 ... Crank arm, 32 ... Mounting leg (bar-shaped member fixing part), 33 ... Bearing, 34 ... Fixed bearing housing part, 34a ... Extension part 35 ... Gear housing part, 36 ... Vibration-proof rubber cap (vibration-proof member), 37,51,61,137,237 ... Car body support part, 37d, 137d, 237d ... Support surface (flat surface), 62 ... Vibration-proof Member, H: Movement locus range, L1: Output shaft axis, S1: Triangle range, Y: Bearing axial range, Z: Center of gravity position.

Claims (7)

A motor body that rotationally drives the rotating shaft;
A gear housing fixed to the motor case of the motor main body, and a speed reducing portion housed in the gear housing and having a speed reducing mechanism for reducing the rotation of the rotating shaft, and the gear housing via a vibration isolating member A wiper motor provided with a vehicle body support that can be supported on the vehicle body,
The gear housing includes a fixed bearing housing portion that houses a bearing that supports the rotating shaft that is fixed to the motor case and protrudes from the motor case, and an opposite side of the fixed bearing housing portion to the side on which the motor case is fixed. And a gear accommodating portion that accommodates the speed reduction mechanism,
The wiper motor according to claim 1, wherein the vehicle body support portion is provided in the fixed bearing housing portion. The wiper motor according to claim 1,
The wiper motor according to claim 1, wherein the vehicle body support portion is provided at a position overlapping an axial range of the bearing. The wiper motor according to claim 1 or 2,
The speed reduction part has an output shaft protruding from the gear housing,
The wiper motor according to claim 1, wherein the vehicle body support portion has a shape having a flat surface parallel to a plane including an axis of the output shaft. The wiper motor according to any one of claims 1 to 3,
The wiper motor according to claim 1, wherein the vehicle body support portion is provided so as to extend in a radial direction about the rotation axis when viewed from an axial direction of the rotation axis. The wiper motor according to any one of claims 1 to 4,
The speed reduction mechanism is a worm that rotates integrally with the rotating shaft and a worm wheel that meshes with the worm and rotates the output shaft.
A crank arm is fixed to the output shaft,
The wiper motor according to claim 1, wherein the vehicle body support portion is provided outside a movement locus range of the crank arm as viewed from an axial direction of the output shaft. The wiper motor according to any one of claims 1 to 5,
The speed reduction mechanism is a worm that rotates integrally with the rotating shaft and a worm wheel that meshes with the worm and rotates the output shaft.
The gear housing is provided with a pair of rod-shaped member fixing portions for fixing to a rod-shaped member fixed to the vehicle body,
The vehicle body support portion is provided so that the entire center of gravity position is disposed within a triangular range formed by a pair of the rod-shaped member fixing portions when viewed from the axial direction of the output shaft. Wiper motor. The wiper motor according to any one of claims 1 to 6,
A flange portion extending radially outward is provided at an end of the motor case on the gear housing side,
On the motor case side in the fixed bearing housing portion, an outer extending portion that extends radially outward and contacts the flange portion is provided,
The wiper motor according to claim 1, wherein the vehicle body support portion is protruded so that a part thereof is supported by the outer extension portion.

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