JP2001028864A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a motor wherein a clutch is provided between a rotating shaft and a worm shaft to control deviation of center between these rotating shaft and worm shaft. SOLUTION: A commutator 15 integrally rotating with s rotating shaft 13 is fixed to such rotating shaft 13 of an armature 14. The commutator 15 allows integral formation of a driving side rotating part 23. On the other hand, the worm shaft 26 interlocking with the rotating shaft 13 allows integral formation of a driven side rotating part 24. This driven side rotating part 24 is engaged with a driving side rotating part 23. A housing 22 forming a clutch mechanism 21 allows integral formation of a housing part 27 for accommodating the driving side rotating part 23 and the driven side rotating part 24, and a worm bearing part 28 supporting the worm shaft 25 for rotation. The clutch mechanism 21 transfers rotation to the worm shaft 26 from the rotating shaft 13 depending on the engaging condition between the driving side rotating part 23 and driven side rotating part 24 in the housing part 27 and rejects transfer of rotation to the rotating shaft 13 from the worm shaft 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor having a clutch.

[0002]

2. Description of the Related Art Conventionally, for example, a motor provided in a power window device reduces a rotation speed of the rotating shaft through a motor body having a rotating shaft of an armature and a worm shaft arranged on the rotating shaft and the concentric shaft. And an output section for transmitting the output to the regulator. When the motor is driven, the rotation of the rotating shaft is transmitted to the output unit via the worm shaft. The rotation of the rotating shaft whose rotation speed has been reduced at the output unit is converted into reciprocating motion by a regulator.
In this way, the regulator opens and closes by moving the window glass up and down.

[0003] In such a power window device, when the motor is not driven, the downward load applied to the window glass is converted into torque by the regulator, and the torque is converted to the original torque. Operates to rotate the motor in reverse. Such a rotation transmission may cause the theft glass to be opened by an external force and cause theft.

In order to prevent this kind of rotation transmission, it has been proposed by the applicants to provide a clutch on a concentric shaft between the rotation shaft and the worm shaft. The clutch includes a drive unit connected to the rotating shaft, and a driven unit engaged with the drive unit and connected to the worm shaft. Then, rotation is transmitted from the rotating shaft to the worm shaft in accordance with the state of engagement between the driving unit and the driven unit, and transmission of rotation from the worm shaft to the rotating shaft is prevented.

[0005]

When the clutch is provided between the rotating shaft and the worm shaft, misalignment may occur between the rotating shaft and the worm shaft due to the connection. is there.

SUMMARY OF THE INVENTION An object of the present invention is to provide a motor in which a clutch is interposed between a rotating shaft and a worm shaft, which can suppress misalignment between the rotating shaft and the worm shaft. .

[0007]

According to a first aspect of the present invention, there is provided a rotating shaft of an armature, which is rotatably supported by a worm bearing in conjunction with the rotating shaft. A worm shaft, a drive unit interposed between the rotation shaft and the worm shaft and interlocked with the rotation shaft, a driven unit engaged with the drive unit and interlocked with the worm shaft, A housing portion housing the driven portion, and transmitting rotation from the rotating shaft to the worm shaft in accordance with an engagement state between the driving portion and the driven portion in the housing portion; And a clutch for preventing transmission of rotation from the shaft to the rotating shaft, wherein the worm bearing and the housing are integrally formed.

According to a second aspect of the present invention, there is provided a rotating shaft of an armature, a worm shaft interlocked with the rotating shaft, and a drive unit interposed between the rotating shaft and the worm shaft and interlocked with the rotating shaft. And a driven part engaged with the driving part and interlocking with the worm shaft, and a housing part housing the driving part and the driven part, wherein the driving part and the driven part in the housing part A clutch that transmits rotation from the rotation shaft to the worm shaft in accordance with the engaged state, and blocks rotation transmission from the worm shaft to the rotation shaft; and a bearing portion that rotatably supports the drive unit. , Wherein the bearing portion and the housing portion are integrally formed.

According to a third aspect of the present invention, in the motor according to the second aspect, a supporting portion for supporting a worm bearing portion of the worm shaft is provided, and the housing portion is fixed to the supporting portion. And

According to a fourth aspect of the present invention, in the motor according to the third aspect, the housing and the bearing are formed integrally with the worm bearing. (Operation) According to the structure of the first aspect of the present invention, the housing part forming the clutch for controlling the rotation transmission and the worm bearing part rotatably supporting the worm shaft are formed integrally. Therefore, for example, the number of parts and the number of manufacturing steps are reduced and the cost is reduced as compared with a case where a part corresponding to the housing part and a part corresponding to the worm bearing part are manufactured separately.

Further, since the housing portion and the worm bearing portion are integrated, the misalignment generated between the clutch and the worm shaft is suppressed, and the misalignment between the rotating shaft and the worm shaft is suppressed.

According to the configuration of the second aspect of the present invention, the housing part forming the clutch for controlling the rotation transmission and the bearing part of the driving part are formed integrally. Therefore, for example, the number of parts and the number of manufacturing steps are reduced as compared with a case where a part corresponding to the housing part and a part corresponding to the bearing part of the drive unit are manufactured separately, and the cost is reduced.

Further, since the housing portion and the bearing portion are integrated, the misalignment of the entire clutch is suppressed, and the misalignment between the rotating shaft and the worm shaft is suppressed.

According to the third aspect of the present invention, the housing is fixed to a support for supporting the worm bearing. In other words, the support part for supporting the worm bearing part also serves as a member for fixing the clutch (housing part). Therefore, the necessity of separately providing components for fixing the clutch, such as bolts, is avoided.

According to the fourth aspect of the present invention, the housing part and the drive part constituting the clutch for controlling the rotation transmission and the worm bearing part for rotatably supporting the worm shaft are integrally formed. Have been. Therefore, the number of parts and the number of manufacturing steps are reduced, and the cost is reduced.

[0016] Further, since the housing portion and the bearing portion and the worm bearing portion are integrated with each other, misalignment between the clutch and the worm shaft is suppressed, and consequently misalignment between the rotating shaft and the worm shaft is suppressed. You.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment in which the present invention is embodied in a power window device will be described below with reference to FIGS.

As shown in FIG. 9, the motor 1 of the power window device is fixed to the door 2. The motor 1 has a motor body 5 and an output unit 6. The forward / reverse rotation of the motor body 5 is transmitted to a gear 7a fixed to the output shaft 7 of the output unit 6, and the gear 7a meshes with a gear unit 8a provided in a known X-arm type regulator 8. Therefore, the regulator 8 opens and closes the window glass 9 based on the forward / reverse rotation of the gear 7a.

As shown in FIG. 2, the motor body 5 is
Motor yoke housing 11, a plurality of magnets 12,
It includes a rotating shaft 13, an armature (armature) 14, a commutator 15, a brush holder 16, and a brush 17 provided in the brush holder 16.

As shown in FIG. 1, the motor yoke housing 11 is formed in a substantially flat cylindrical shape with a bottom. Two magnets 12 are fixed to the inner peripheral surface base end side in an opposed arrangement. The rotation shaft 1 is provided on the bottom of the motor yoke housing 11 along the center axis thereof.
3 is rotatably supported via a bearing 18.

The armature 14 is fixed to an intermediate portion of the rotating shaft 13 corresponding to the position of the magnet 12. The armature 14 of the rotating shaft 13
The commutator 15 is fixed on the distal end side. The commutator 15 includes, for example, a commutator main body 19 made of a resin material and a plurality of commutator pieces 20 made of a conductive material provided around the commutator main body 19. A drive-side rotating unit 23 as a drive unit that constitutes a clutch mechanism 21 described later is integrally formed on the tip end side (the output unit 6 side) of the commutator main body 19.

A brush holder 16 having an outer peripheral surface corresponding to the inner peripheral surface of the motor yoke housing 11 is pressed into the opening side of the motor yoke housing 11. Here, the brush 17 is arranged at a position corresponding to the commutator 15 (commutator piece 20) and is in contact with the commutator 15 (commutator piece 20). Therefore, when a current is supplied from an external power supply, a current is supplied to the coil conductor wound around the armature 14 via the brush 17 and the commutator 15 (commutator piece 20), and the armature 1
4, that is, the rotating shaft 13 of the motor body 5 is driven to rotate.

A clutch mechanism 21 is provided at the tip of the motor body 5 (rotary shaft 13). As shown in FIGS. 3 to 6, the clutch mechanism 21 includes a housing 22, a drive-side rotating unit 23 integrally formed on the distal end of the commutator 15 (commutator body 19), and a driven unit as a driven unit. A side rotation unit 24 (see FIG. 6) and a plurality of (four) rolling elements 25 are provided. In addition, the driven-side rotating unit 24
Is integrally formed on the base end side of a worm shaft 26 described later.

A substantially cylindrical housing portion 27 having an inner peripheral surface having a radius R1 (see FIGS. 3 and 4) is formed on the base end side (the lower side in FIG. 3) of the housing 22. A substantially cylindrical worm bearing 28 having an inner peripheral surface with a radius R4 (see FIG. 3) smaller than the radius R1 is formed on the distal end side (upper side in FIG. 3). The housing 22 is non-rotatably fixed to the output unit 6 in a manner to be described later. In this state, the worm bearing 28 functions as a bearing that rotatably supports the worm shaft 26.

The drive-side rotating section 23 is rotatably mounted on the housing 22. As described above, the drive-side rotating portion 23 is integrally formed on the tip side of the commutator 15 (commutator body 19), and rotates integrally with the rotating shaft 13 of the motor body 5.

The driving-side rotating portion 23 has a radius R2 which is larger in diameter than the commutator body 19 of the commutator 15 and has a slight gap between itself and the inner peripheral surface of the housing 22.
(See FIG. 4). A peripheral portion 32 surrounding the rotating shaft 13 and protruding toward the distal end is integrally formed at the center of the disk portion 31. In addition, two engaging pieces 33 are formed on the outer peripheral surface of the peripheral portion 32 so as to face each other and protrude in the radial direction. As shown in FIG. 4, the engagement piece 33 is formed to protrude in a substantially isosceles triangular shape along the radial direction.

A plurality of guide pieces 34 are formed on the distal end side (upper side in FIG. 3) of the disk portion 31 at equal angles (90 degrees) and project in parallel with the axial direction along the outer peripheral surface. The guide piece 34 has an inner peripheral surface having a radius R3 (see FIG. 4), and its radial width W1 (see FIG. 4) is equal to the radius R2.
And the radius R3 (= R2−R3).

Further, both side surfaces of the guide piece 34 are recessed with a curvature R (see FIG. 4). In FIG. 4, when the surface on the clockwise side of the guide piece 34 is a first guide surface 34a and the surface on the counterclockwise side of the guide piece 34 is a second guide surface 34b, the outer periphery of the guide piece 34 The circumferential width W2 between the opposing first and second guide surfaces 34a, 34b of each adjacent guide piece 34 at a substantially intermediate position between the surface and the inner peripheral surface is set to be longer than the radial width W1. Have been.

The rolling element 25 abuts on the inner peripheral surface of the housing 22 and is disposed at a substantially intermediate portion between the opposing first and second guide surfaces 34a and 34b of the adjacent guide pieces 34. I have. The rolling element 25 is a sphere having a radius corresponding to the curvature R, and its diameter D1 (= 2R) (see FIG. 4) is set to be larger than the radial width W1. Then, as shown in FIGS. 7A and 7B, the rolling element 25 moves along one of the guide surfaces 34a and 34b along with the rotation of the drive-side rotating portion 23 (guide piece 34). It comes into contact.

The driven side rotating portion 24 has a radius R that is equal to the inner radius of the worm bearing portion 28 of the housing 22 and is slightly smaller than the inner radius R3 of the guide piece 34.
4 (see FIG. 4), the worm shaft 26 is formed integrally with the base end side, and a housing recess 35 is formed at each position on the outer peripheral surface corresponding to the position of the rolling element 25 (see FIG. 4). 3 and 6). Then, the driven side rotating unit 2
4 is a housing recess 35 between the first and second guide surfaces 34a and 34b of each adjacent guide piece 34.
Between the rolling element 25 and the inner peripheral surface of the housing 22.
Is rotatably provided within the drive-side rotating portion 23 within a predetermined range in a state where is accommodated.

That is, the driven side rotating portion 24 is formed with an insertion hole 36 through which the peripheral portion 32 of the driving side rotating portion 23 is rotatably inserted. And this insertion hole 3
On the outer peripheral side of 6, an engagement hole 37 having a substantially quadrangular cross section is formed corresponding to the position of the engagement piece 33.

At the distal end of the insertion hole 36, a rotary shaft insertion hole 3 having an inner diameter equal to the outer diameter of the rotary shaft 13 is provided.
8 are formed (see FIG. 5). This rotary shaft insertion hole 3
8, a rotating shaft 1 protruding from the distal end side of the peripheral portion 32;
3 is rotatably supported. In other words, the rotation shaft insertion hole 38 formed in the worm shaft 26 (the driven rotation part 24) functions as a bearing on the tip end side of the rotation shaft 13.

Here, in FIG. 4, the clockwise surface of the engagement piece 33 is a first engagement surface 33a, and the counterclockwise surface of the engagement piece 33 is a second engagement surface 33b. . The side surface of the engagement hole 37 facing the first engagement surface 33a is defined as a first contact surface 37a, and the side surface facing the second engagement surface 33b is defined as a second contact surface 37b. At this time, FIG.
As shown in (a), when the drive-side rotating part 23 rotates in the direction of the arrow (clockwise), the first engagement surface 33a comes into contact with substantially the entire first contact surface 37a. FIG.
As shown in (b), when the drive-side rotating part 23 rotates in the direction of the arrow (counterclockwise), the second engagement surface 33b
The contact surface 37b comes into contact with almost the entire surface.

Here, as shown in FIG. 4, a cross section orthogonal to the central axis direction of the worm shaft 26 at the deepest portion of the housing recess 35, the center of the housing recess 35 is the top portion. , A control surface 35a is formed which is a valley with both sides disposed substantially symmetrically. When the radius from the center of the driven-side rotating unit 24 to the center (top) of the control surface 35a is R5 (see FIG. 4), the radius R5 is set to be slightly smaller than the radius R4 of the driven-side rotating unit 24. ing. Also, the inner peripheral radius R of the housing 22
The difference between 1 and the radius R5 (= R1−R5) is substantially equal to the diameter D1 (= 2R) of the rolling element 25.

The radius from the center of the driven side rotating portion 24 to each valley of the control surface 35a is, of course, set to be smaller than the radius R5. The above-mentioned drive side rotating part 2
As shown in FIG. 7 (a), the rolling element 25 is brought into contact with the first guide surface 34a of the guide piece 34 in a state where the first engagement surface 33a and the first contact surface 37a are in contact with the rotation of the third piece 3 as shown in FIG. Are in contact with each other, and as shown in FIG. 7B, when the second engagement surface 33b and the second contact surface 37b are in contact with each other.
When the rolling element 25 is in contact with the second guide surface 34 b of the guide piece 34, the center axis of the rolling element 25 is radially shifted from the center axis of the drive-side rotating portion 23 to the central portion (top portion) of the control surface 35 a. ) (Hereinafter, this state is referred to as a “neutral state”). In this neutral state, the rolling element 25 is connected to the control surface 35 a of the accommodation recess 35 by the housing 2.
2, the driven-side rotating portion 24 in which the accommodating concave portion 35 is formed is rotatable with respect to the housing 22.

Accordingly, when the driving side rotating portion 23 rotates in the direction of the arrow (clockwise) in FIG. 7A, the first contact surface 37a of the driven side rotating portion 24 (the engaging hole 37) is brought into the first engagement position. The driven side rotating unit 24 rotates together with the driving side rotating unit 23 in the same direction as the driven surface rotating unit 24 abuts and is pressed against the mating surface 33a. .

When the driving-side rotating portion 23 rotates in the direction of the arrow (counterclockwise) in FIG. 7B, the second contact surface 37b of the driven-side rotating portion 24 (engaging hole 37) is moved to the second position. The driven side rotating unit 24 rotates in the same direction together with the driving side rotating unit 23 in contact with and pressed by the engaging surface 33b.

When the driven side rotating unit 24 rotates along with the rotation of the driving side rotating unit 23, the rolling element 25 is also pushed and moved in the same direction by the first guide surface 34a or the second guide surface 34b. . Therefore, when the driven-side rotating unit 24 rotates with the rotation of the driving-side rotating unit 23, the rolling element 25
Is always in a neutral state.

Conversely, when the driven-side rotating unit 24 rotates to rotate the driven-side rotating unit 23 to rotate the driven-side rotating unit 23, first, as shown in FIGS. ,
The driven side rotation part 24 rotates in the direction of the arrow in the engagement hole 37. At this time, since the driving-side rotating portion 23 is stopped, the rolling element 25 is separated from the first guide surface 34a or the second guide surface 34b, and is further outer circumferential side of one valley of the control surface 35a of the accommodation recess 35. Move relative to. Eventually, when the radial distance between the control surface 35a between which the rolling elements 25 are interposed and the inner peripheral surface of the housing 22 becomes smaller than the diameter D1 of the rolling elements 25, the rolling elements 25 are brought into contact with the control surface 35a of the accommodation recess 35. It is clamped by the inner peripheral surface of the housing 22. When the rolling element 25 is sandwiched, further rotation of the driven-side rotating unit 24 is prevented, and the driven-side rotating unit 23 does not rotate.

As shown in FIGS. 1 and 2, the output section 6 includes a housing 41, a worm wheel 42, a rubber 43 for protecting the motor, an output plate 44, a plate cover 45, and the output shaft 7.

On the base end side of the housing 41, there is provided a fitting convex portion 41a formed in a flat cylindrical shape having an outer peripheral surface corresponding to the inner peripheral surface of the motor yoke housing 11 (FIG. 2). 2). And the housing 41 is
The fitting convex portion 41a is connected to the motor yoke housing 11
And is fixed to the motor main body 5.

The housing 41 is formed with a worm housing 51 and a wheel housing 52. The worm housing part 51 is formed in a substantially bottomed cylindrical shape with an inner diameter equivalent to the inner diameter of the housing part 27 of the housing 22, and expands on the opening side (the left side in FIG. 5) via a step part 51 a. Opened housing fixing part 5
1b is formed. This housing fixing portion 51b
Has an inner diameter equivalent to the outer diameter of the housing 22, and its base end side (motor body 5 side) is a projecting portion 57 as a cylindrical support portion. The housing 22 is press-fitted and fixed to the housing fixing portion 51b.

The shaft portion 53 of the worm shaft 26 having the above-described driven side rotating portion 24 formed on the base end side is accommodated in the worm housing portion 51. A worm 53a is formed on the shaft 53. Worm shaft 26
The (shaft portion 53) is rotatably supported at two positions on the base end side and the distal end side via the housing 22 (worm bearing portion 28) and the cylindrical sliding bearing 55, respectively. Accordingly, in the housing 22 fixed to the housing fixing portion 51b, the housing portion 27 constitutes the clutch mechanism 21, and the worm bearing 28 serves as a bearing for the worm shaft 26. The movement of the worm shaft 26 toward the distal end in the axial direction (the right side in FIG. 2) is restricted by the thrust bearing 56.

The worm shaft 26 is not housed in the housing 41 (worm housing portion 51) in advance, and the driven-side rotating portion 24 is fixed to the housing 22 (housing) before the housing 22 is fixed. Part 27). That is, the driven-side rotating portion 24 of the worm shaft 26 is configured such that each of the adjacent guide pieces 34
Between the housing 22 (housing part 2)
7) and housed inside the drive-side rotating unit 23. At this time, the base end side of the shaft 53 of the worm shaft 26 is supported by the worm bearing 28 of the housing 22. In this state, by inserting the housing 22 and the worm shaft 26 along the axial direction from the base end side of the worm housing portion 51, the worm shaft 26 is housed in the worm housing portion 51, and 22 (clutch mechanism 21) is fixed to the housing fixing part 51b of the worm housing part 51, and the motor main body 5 is also fixed to the housing 41 (output part 6).

The wheel housing portion 52 is formed in a substantially cylindrical shape with a bottom, and a cylindrical bearing wall 52a extending inward in the axial direction is formed at the center of the bottom of the wheel housing portion 52.
A shaft hole 52b through which the output shaft 7 is rotatably inserted.
Are formed.

The worm wheel 42 is formed of a resin material into a substantially cylindrical shape with a bottom, and the outer surface of the worm wheel 42
A worm wheel portion 42a meshing with 3a is formed. A cylindrical support wall 42b extending inward in the axial direction is formed at the center of the bottom of the worm wheel 42, and the support wall 42b formed on the housing portion 52 is formed on the support wall 42b.
An axial hole 42c rotatably fitted to 2a is formed. On the inner peripheral surface of the cylindrical portion of the worm wheel 42, three holding walls 42d extending toward the support wall 42b are equiangular (1).
(20 °). That is, on the inner peripheral side of the worm wheel 42, three holding chambers X substantially partitioned by the holding wall 42d, the tip of the holding wall 42d and the support wall 42b
A communication groove Y that communicates the adjacent holding chambers X with each other is formed between the outer peripheral surface and the outer peripheral surface.

The rubber 43 for protecting the motor is formed corresponding to the holding chamber X and the communication groove Y of the worm wheel 42. More specifically, the rubber 43 for motor protection is composed of three rubber spring portions 43a formed in a substantially fan shape and connection details 43b for connecting the rubber spring portions 43a in a ring shape. An engagement groove 43c penetrating in the thickness direction extends from the center of the outer peripheral side of each rubber spring portion 43a to a predetermined position on the inner peripheral side. The rubber 43 for motor protection fits into the holding chamber X and the communication groove Y of the worm wheel 42 and rotates together with the worm wheel 42.

The output plate 44 is a ring-shaped metal plate. The output plate 44 has a portion formed by cutting and raising the outer peripheral side of a substantially disk-shaped metal plate.
Are formed so as to engage with the engagement grooves 43c of the rubber 43 for protecting the motor. Therefore, the worm wheel 42
Is rotated, the rotational force is transmitted to the output plate 44 via the rubber 43 for motor protection. As a result, the output plate 44 rotates with the rotation of the worm wheel 42 via the rubber 43 for motor protection.

In the center of the output plate 44, there are formed fitting holes 44b having cuts formed at equal angles (90 degrees). The base end of the output shaft 7 is non-rotatably connected and fixed to the fitting hole 44b. Therefore, the output shaft 7 is rotated integrally with the output plate 44.

The upper end of the wheel housing 52 is
It is covered with a plate cover 45. The plate cover 45 is formed in a substantially disk shape, and a plurality of swaging pieces 45a are formed on an outer peripheral side thereof. These caulking pieces 45a protrude radially outward of the plate cover 45,
The wheel housing 52 is bent in accordance with the position of the outer peripheral portion. Therefore, the plate cover 45 is fixed to the upper end of the housing portion 52 by caulking the caulking piece 45 a to the outer peripheral portion of the wheel housing portion 52. The movement of the output shaft 7 and the like upward in the axial direction is restricted by the plate cover 45.

The output shaft 7 whose base end is connected and fixed to the output plate 44 is rotatably penetrated through the shaft hole 52b of the wheel housing 52, and its tip protrudes from the housing 52. I have. The protruding output shaft 7
The gear 7a is fixed to the tip of the gear 7a.
The gear portion 8a provided on the X-arm type regulator 8 (FIG. 10) is meshed.

Next, the operation of the power window device configured as described above will be described. When the motor 1 is driven, the rotating shaft 13 (commutator 15) rotates the driving-side rotating unit 23 of the clutch mechanism 21. The drive-side rotating unit 23 includes a worm shaft 26 (a driven-side rotating unit 24).
To rotate. At this time, since the rolling element 25 is maintained in the neutral state, the rotation of the worm shaft 26 (the driven-side rotating section 24) is not prevented. The worm shaft 26 (the worm 53a of the shaft 53) is connected to the worm wheel 42,
The output shaft 7 is rotated via the rubber 43 for motor protection and the output plate 44. Then, the output shaft 7 drives the regulator 8 to open and close the window glass 9.

On the other hand, when the load is applied to the window glass 9 in a state where the motor 1 is stopped, and the output shaft 7 is rotated by the load, the output plate 44, the motor protection rubber 43, and the worm wheel 42 Worm shaft 2
6 (the driven-side rotating unit 24) starts rotating. At this time, the rolling element 25 is connected to the control surface 35a of the accommodation recess 35 and the housing 2.
2 (housing part 27). When the rolling element 25 is clamped, the driven-side rotating portion 24
Is prevented from rotating any further, and the drive-side rotating part 23 (the rotating shaft 13) also does not rotate. Further, further rotation of the worm shaft 26, the worm wheel 42, the rubber 43 for motor protection, the output plate 44, and the output shaft 7 related to such rotation transmission is also prevented.

Therefore, even if a large load is applied in the direction in which the window glass 9 is opened, the rotation of the driven-side rotating portion 24 (the output shaft 7) is prevented, so that the window glass 9 is not opened by the load.

As described in detail above, according to the present embodiment, the following effects can be obtained. (1) In the present embodiment, the housing 22 is integrally formed with the housing portion 27 that forms the clutch mechanism 21 for controlling the rotation transmission and the worm bearing portion 28 that rotatably supports the worm shaft 26. . Therefore, for example, the component corresponding to the housing portion 27 and the worm bearing portion 2
Compared to the case where parts equivalent to 8 are manufactured separately,
The number of parts and the number of manufacturing steps can be reduced, and the cost can be reduced.

Further, since the housing portion 27 and the worm bearing portion 28 are integrated, it is possible to suppress the misalignment that occurs between the clutch mechanism 21 and the worm shaft 26. (2) In the present embodiment, the drive-side rotating unit 23 constituting the clutch mechanism 21 for controlling the rotation transmission
The commutator 15 (commutator main body 19) is integrally formed on the distal end side of the commutator 15 which rotates integrally with the commutator. Therefore, commutator 1
An extra space between the clutch mechanism 5 and the clutch mechanism 21 can be omitted, and downsizing in the center axis direction can be achieved.

(3) In the present embodiment, the drive-side rotating part 23 constituting the clutch mechanism 21 for controlling the rotation transmission
Is formed integrally with the tip end of a commutator 15 (commutator body 19) that rotates integrally with the rotating shaft 13. Similarly, the driven-side rotating portion 24 constituting the clutch mechanism 21 is integrally formed on the base end side of the worm shaft 26. In other words, the driving-side rotating unit 23 and the driven-side rotating unit 24
The commutator 15 or the worm shaft 26 can be formed in the original process of manufacturing. Therefore, for example, when a component corresponding to the driving-side rotating unit 23 is provided separately and connected to a commutator (rotating shaft), or a component corresponding to the driven-side rotating unit 24 is provided separately and is connected to the worm shaft. The number of parts and the number of manufacturing steps can be reduced, and costs can be reduced, as compared with the case of connecting to other devices.

Further, when parts corresponding to the drive-side rotating part 23 are provided separately and connected to a commutator (rotary shaft), it is possible to avoid misalignment occurring between these parts and the commutator (rotary shaft). it can. Further, generation of abnormal noise, vibration, and the like due to misalignment between these components and the commutator (rotary shaft) can also be avoided.

Similarly, when components corresponding to the driven-side rotating portion 24 are separately provided and connected to the worm shaft, misalignment between these components and the worm shaft can be avoided. Further, generation of abnormal noise, vibration, and the like due to misalignment between these components and the worm shaft can also be avoided.

(4) In the present embodiment, the worm shaft 26
A receiving recess 35 is formed in the (driven side rotating portion 24), and the first and second guide surfaces 34 of the adjacent guide pieces 34 facing each other.
The rolling element 25 is accommodated and held between the accommodation concave portion 35 and the inner peripheral surface of the housing 22 between a and b. Therefore, for example, separately cover, etc.
The number of parts and the number of manufacturing steps can be reduced, and the cost can be reduced, as compared with the case where the rolling elements 25 are provided and held by holding them.

(5) In this embodiment, the worm shaft 26
A rotation shaft insertion hole 38 was formed at the distal end side of the insertion hole 36 of the (driven side rotation unit 24). Then, the rotary shaft insertion hole 38 is made to function as a bearing on the tip end side of the rotary shaft 13. Therefore, misalignment that occurs between the rotating shaft 13 and the worm shaft 26 can be suppressed.

(6) In the present embodiment, the entire commutator 15 (motor body 5) including the drive-side rotating section 23 receives a base-side force generated along the central axis of the worm shaft 26. Can be.

(7) In the present embodiment, the worm shaft 26
(The driven side rotating portion 24) is provided with the rolling element 25
In the housing 22 (housing section 2).
7) and housed inside the drive side rotating portion 23, and in this state, the housing 22 and the worm shaft 26 are inserted from the base end side of the worm housing portion 51 along the axial direction thereof, whereby the worm shaft 26 Is housed in the worm housing part 51. At this time, the housing 22
The (clutch mechanism 21) is press-fitted into the housing fixing portion 51b of the worm housing portion 51 and is easily fixed.
The motor body 5 is also fixed to the housing 41 (output section 6). Therefore, the worm shaft 26 and the clutch mechanism 21
Can be improved.

Further, for example, the alignment of the worm shaft and the clutch mechanism, which is required when the clutch mechanism is connected to the worm shaft housed in the housing 41 (the worm housing portion 51) in advance, becomes unnecessary, and the assembling work is performed. Can proceed smoothly.

Further, the worm shaft is
When the housing 41 is housed in the (worm housing part 51), for example, the worm shaft may fall off if the opening side (projection 57 side) of the housing 41 faces downward before the clutch mechanism is fixed. However, such a drop of the worm shaft can also be avoided.

(8) In the present embodiment, the clutch mechanism 21
Is provided closer to the motor body 5 than the rubber 43 for protecting the motor. Therefore, it is possible to reduce the reverse sound generated when the window glass 9 is opened after the window glass 9 is closed.

(9) In this embodiment, the window glass 9
Even if a large load is applied in the direction in which the
The rotation of (output shaft 7) is prevented. Therefore, even if such a load is applied, the window glass 9 does not open, and it is possible to prevent the window glass 9 from being naturally opened by theft prevention or vibration.

(10) In the present embodiment, the driving side rotating unit 2
3 rotates the first engagement surface 3 of the engagement piece 33 in the clockwise direction.
The power is transmitted to the driven side rotation unit 24 through the entire contact surface between the engagement hole 3a and the first contact surface 37a of the engagement hole 37. Further, the rotation in the counterclockwise direction is transmitted to the driven side rotation unit 24 through the entire contact surface between the second engagement surface 33 b of the engagement piece 33 and the second contact surface 37 b of the engagement hole 37. Is done. Therefore, the durability of the driving-side rotating portion 23 with respect to the rotation transmission can be improved as compared with the rotation transmission through, for example, a knock pin or the like.

(11) In this embodiment, the rolling element 25 is sandwiched between the housing 22 and the control surface 35a only when the rotation from the driven-side rotating section 24 is prevented. Therefore, for example, the rotation from the driving-side rotating portion is also sandwiched, and there is no need to increase the strength of the rolling elements as compared with the rolling elements that contribute to the rotation.

(12) In the present embodiment, the rolling elements 25 are formed into spherical bodies. Therefore, since the rolling elements 25 are three-dimensionally symmetric, it is possible to avoid, for example, an unstable posture and unintended rotation transmission.

Since the rolling elements 25 are spherical, the housing 22 (housing section 27) and the accommodation recess 35
Are arranged in such a manner that they are in point contact with each other. Accordingly, the sliding noise can be reduced particularly when the driving-side rotating portion 23 rotates.

If the rolling element 25 is made of the same component as the thrust bearing 56, for example, and the same thrust bearing 56 is used as the rolling element 25, the number of components can be reduced.

(Second Embodiment) Hereinafter, a second embodiment in which the present invention is embodied in a power window device will be described with reference to FIGS.
This will be described with reference to FIG. For convenience of description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is partially omitted.

In this embodiment, the housing part of the clutch mechanism and the bearing part of the worm shaft are separate parts, and this housing part is used as a bearing for the driving side rotating part, and the driving side rotating part is rotatably supported. The second embodiment is different from the first embodiment in that the commutator and the drive-side rotating unit are provided separately.

That is, as shown in FIG. 12, the commutator 61 in the present embodiment is formed in a substantially cylindrical body, and has a rotating shaft (armature rotating shaft) 6 at its tip end.
2 project along the central axis. The rotating shaft 62 is formed with a fitting surface 62a that extends in a plane in the axial direction so that its cross section is substantially D-shaped (see FIG. 10).

The commutator 61 is formed with a fitting hole 63 recessed along the central axis. The fitting hole 63 has a flat fitting surface 63a that is opposed to the fitting hole 63a.

On the other hand, as shown in FIG. 12, a shaft fitting hole 67 having a substantially D-shaped cross section (see FIG. 10) corresponding to the rotating shaft 62 is formed in the driving side rotating portion 66 in this embodiment. Is formed. The drive-side rotating portion 66 is formed with a fitting projection 68 protruding along the central axis, corresponding to the fitting hole 63. The outer peripheral surface of the fitting projection 68 has a flat fitting surface 68a formed corresponding to the fitting surface 63a.

Therefore, the driving side rotating portion 66 has the shaft fitting hole 67 in which the rotating shaft 62 is inserted, and the fitting convex portion 68.
Are fixed to the commutator 61 by being fitted into the fitting holes 63. And the commutator 6
When 1 (rotary shaft 62) rotates, its rotational force is transmitted to the drive side rotation unit 66, and the commutator 61 and the drive side rotation unit 66 rotate integrally.

Here, the drive-side rotating portion 66 in the present embodiment has a disk portion 69 whose diameter is larger than that of the guide piece 34.
have. The drive-side rotating portion 66 is rotatably supported by a substantially cylindrical housing 70 having an inner diameter equal to the outer diameter of the disk portion 69. In other words, the contact surface of the housing 70 with the disk portion 69 is a bearing portion 70 that rotatably supports the drive-side rotating portion 66.
a.

The housing 70 houses the driving-side rotating section 66 and the driven-side rotating section 24 and forms the clutch mechanism 21. This housing 70
An inner diameter equal to the outer diameter is press-fitted into a housing fixing portion 71 formed on the projecting portion 57 and is fixed so as not to rotate.

The base end of the worm shaft 26 is rotatably supported by a sliding bearing 72 as a worm bearing, which is separate from the housing 70. As described above in detail, according to the present embodiment, the following effects can be obtained in addition to the effects similar to the effects (2), (4) to (12) in the first embodiment. .

(1) In the present embodiment, the bearing 70a of the drive-side rotating portion 66 is formed integrally with the housing 70 constituting the clutch mechanism 21 for controlling rotation transmission. Therefore, for example, the bearing portion 70 of the drive side rotating portion 66
Compared to the case where a is provided separately, the number of parts and the number of manufacturing steps can be reduced, and the cost can be reduced.

Further, since the driving side rotating portion 66 rotates integrally with the commutator 61 (rotating shaft 62), the housing 70 indirectly supports the rotating shaft 62. Therefore, the misalignment of the center axis of the rotation shaft 62 can be suppressed.

Further, since the bearing 70a of the drive-side rotating portion 66 is formed integrally with the housing 70, the misalignment of the entire clutch mechanism 21 is suppressed, and the center between the rotating shaft 62 and the worm shaft 26 is further reduced. Deviation can also be suppressed.

(2) In the present embodiment, the projecting portion 57 for supporting the slide bearing 72 also serves as a member for fixing the clutch mechanism 21 (housing 70) to the output portion 6 (housing 41). Therefore, the clutch 21 is connected to the output unit 6.
It is possible to avoid the necessity of separately providing a component for fixing to the device, for example, a bolt or the like.

(3) In the present embodiment, the fitting holes 63 and the fitting projections 68 are formed in the commutator 61 and the driving-side rotating portion 66, respectively. Therefore, the commutator 61 and the driving-side rotating section 66 can be easily connected by fitting the fitting hole 63 and the fitting projection 68.

The embodiment of the present invention is not limited to the above embodiment, but may be modified as follows. -In the said 1st Embodiment, although the drive side rotation part 23 was integrally formed in the front-end | tip side of the commutator 15, these may be formed separately, respectively.

In the second embodiment, the housing 70 and the slide bearing 72 are formed separately from each other.
These may be formed integrally. In the second embodiment, the commutator 61 and the drive-side rotating unit 66 are formed separately, but may be formed integrally.

In the second embodiment, the fitting hole 63 and the fitting projection 68 are formed in the commutator 61 and the driving-side rotating portion 66, respectively, and the fitting hole 63 and the fitting projection 68 are fitted. By doing so, the commutator 61 and the drive-side rotating unit 66 were connected. On the other hand, commutator 6
1, a fitting projection may be formed, and a fitting hole may be formed in the driving-side rotating portion 66.

Further, for example, the commutator 61 and the driving-side rotating section 66 may be connected by press-fitting. Further, the commutator 61 and the drive-side rotating section 66 may be coupled to each other by providing the commutator 61 and the drive-side rotating section 66 with shapes that are locked to each other, and the drive-side rotating section 66 is locked to the commutator 61.

In these cases, the commutator 6
1 and the driving-side rotating section 66 can be easily coupled. In the second embodiment, a fitting hole 63 and a fitting surface 62 a are formed in the commutator 61 and the rotating shaft 62, respectively, and a fitting projection 68 and a shaft fitting hole 6 are formed in the driving-side rotating portion 66.
7 was formed. Then, the commutator 61 (rotating shaft) and the driving-side rotating portion 66 were connected by a fitting means including the fitting hole 63 and the fitting projection 68 and the fitting surface 62 a and the shaft fitting hole 67. On the other hand, the commutator 61 (the rotation shaft 13) and the drive-side rotation are formed by only one fitting means consisting of the fitting hole 63 and the fitting projection 68 or the fitting surface 62a and the shaft fitting hole 67. The parts 66 may be combined.

In the second embodiment, the housing 70 (clutch mechanism 21) is connected to the worm housing 5
1 (housing 41) side. On the other hand, the housing 70 (the clutch mechanism 21) may be fixed to the motor main body 5 side by, for example, forming a projecting portion for fixing the housing 70 to the brush holder 16.

The bearing structure of the worm shaft 26 employed in each of the above embodiments may be a rolling bearing. In the above-described embodiments, the driven-side rotating portion 24 is formed integrally with the base end side of the worm shaft 26, but these may be provided separately and connected.

In the above embodiments, the configuration is adopted in which the rotating shaft 13 of the armature 14 and the worm shaft 26 are arranged concentrically. However, the respective axes of the rotating shaft 13 and the worm shaft 26 are A shifted configuration may be employed.

In the above embodiments, the rolling elements 25
Was a sphere. On the other hand, as shown in FIG. 13, a substantially cylindrical rolling element 75 may be provided so that the central axis is parallel to the central axis of the housing 22.
In this case, at the time of reverse rotation, the rolling element is sandwiched in a state where the side surface thereof and the inner peripheral surface of the housing 22 are in line contact. Accordingly, it is possible to more reliably prevent the rotation of the driven-side rotating portion 24, and to more reliably prevent the window glass 9 from opening when a load is applied in the direction of opening the window glass 9. it can. .

In the above embodiments, the rolling elements 25
Are four, but the number may be any number as long as it is one or more. In this case, a corresponding number of guide pieces 34 or accommodating recesses 35 are formed in the drive-side rotation unit 23 and the driven-side rotation unit 24, respectively.

In each of the above-described embodiments, the control surface 35a of the housing recess 35 of the driven-side rotating portion 24 has a shape in which the center is the top and the both sides are the valleys arranged substantially symmetrically. . On the other hand, as shown in FIG.
Obliquely from both sides of the accommodation recess 35 toward the center,
The center may be the control surface 81 that becomes a valley. Further, as shown in FIG. 15, a control surface 82 in which the center of the accommodation recess 35 is a straight valley may be used. Further, as shown in FIG. 16, a control surface 83 may be used in which both sides of the housing recess 35 are linearly connected.

The rotation transmission / reverse rotation prevention structure of the clutch employed in each of the above embodiments is merely an example.
A clutch having another structure may be employed. Next, technical ideas other than the claims that can be grasped from the above embodiments are described below together with their effects.

(A) The motor according to any one of claims 1 to 4, further comprising: a commutator (15, 61) which rotates integrally with the rotating shaft (13, 62); Is a motor directly connected to the commutator (15, 61).

According to this configuration, the driving section of the commutator is directly connected to the commutator. Therefore, an extra space between the commutator and the clutch (drive unit) is omitted, and the length of the motor along the central axes of the rotating shaft and the worm shaft is reduced.

(B) In the motor according to any one of (1) to (4) and (a), the commutator (6
1) is provided with a commutator side fitting means (63), and the driving section (66) is provided with a driving section side fitting means (68) fitted with the commutator side fitting means (63). Motor to do.

According to this configuration, the commutator and the driving section are easily connected by fitting the commutator-side fitting means and the driving-section-side fitting means. (C) In the motor according to any one of (1) to (4) and (A) and (B), the rotating shaft (62) includes a rotating shaft-side fitting means (62a), and the driving unit ( 66) A motor comprising a shaft fitting means (67) fitted with the rotating shaft side fitting means (62a).

According to this configuration, the commutator (rotating shaft) and the driving unit are easily connected by fitting the rotating shaft side fitting means and the shaft fitting means. (D) The motor according to any one of claims 1 to 4 and (a), wherein the driving section (23) is formed integrally with the commutator (15).

According to this configuration, the driving section is formed integrally with the commutator. Therefore, the number of parts and the number of manufacturing steps are reduced, and the cost is reduced. (D) In the motor according to any one of (1) to (4) and (a) to (d), the driven portion (24) is formed integrally with the worm shaft (26). motor.

According to the above configuration, the driven portion is formed integrally with the worm shaft. Therefore, the number of parts and the number of manufacturing steps are reduced, and the cost is reduced.

[0106]

As described in detail above, according to the first, second and fourth aspects of the present invention, the misalignment between the rotating shaft and the worm shaft can be suppressed.

According to the third aspect of the present invention, the supporting portion for supporting the worm shaft is a clutch (housing portion).
And also serves as a member for fixing. Therefore, it is possible to avoid the necessity of separately providing a component for fixing the clutch.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a motor according to the present invention.

FIG. 2 is a partial cross-sectional view showing the same embodiment.

FIG. 3 is an exploded perspective view showing the same embodiment.

FIG. 4 is a sectional view showing the same embodiment.

FIG. 5 is a sectional view showing the same embodiment.

FIG. 6 is an exploded perspective view showing the same embodiment.

FIG. 7 is an exemplary sectional view showing the operation of the embodiment;

FIG. 8 is an exemplary sectional view showing the operation of the embodiment;

FIG. 9 is an exemplary diagram showing an outline of a power window device to which the embodiment is applied;

FIG. 10 is a sectional view showing a second embodiment of the motor according to the present invention.

FIG. 11 is an exemplary sectional view showing the embodiment;

FIG. 12 is an exploded perspective view of the embodiment.

FIG. 13 is a sectional view showing another configuration example of the motor according to the present invention.

FIG. 14 is a sectional view showing another configuration example of the motor according to the present invention.

FIG. 15 is a sectional view showing another configuration example of the motor according to the present invention.

FIG. 16 is a sectional view showing another configuration example of the motor according to the present invention.

[Explanation of symbols]

13, 62 ... rotating shaft, 14 ... armature, 21 ... clutch mechanism as a clutch, 23, 66 ... driving side rotating part as a driving part, 24 ... driven side rotating part as a driven part,
26 ... worm shaft, 27, 70 ... housing part, 28 ...
Worm bearing part, 57 ... Projecting part as support part, 70a
... bearings, 72 ... sliding bearings as worm bearings.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D127 AA00 AA17 BB01 CB01 CB02 CB05 CC05 CC13 DF01 DF04 DF08 DF12 DF15 EE01 EE11 EE15 GG03 GG05 5H607 AA12 BB01 BB04 BB14 CC01 CC03 CC05 CC02 DD03 EE32 EE04

Claims (4)

[Claims] 1. A rotating shaft (13) of an armature (14).
And a worm bearing (28) interlocked with the rotating shaft (13).
A worm shaft (26) rotatably supported by the worm shaft; and a drive unit (23) interposed between the rotation shaft (13) and the worm shaft (26) and interlocked with the rotation shaft (13).
And the worm shaft (2) engaged with the driving portion (23).
6) a driven part (24) interlocked with the driving part (23) and a housing part (27) that houses the driven part (24), and the driving part (27) in the housing part (27). Rotation is transmitted from the rotation shaft (13) to the worm shaft (26) in accordance with the engagement state between the driven shaft (23) and the driven portion (24), and the rotation shaft (13) is transmitted from the worm shaft (26) to the rotation shaft (13). And a clutch (21) for preventing transmission of rotation to the worm bearing, and wherein the worm bearing (28) and the housing (27) are integrally formed. 2. The rotating shaft (62) of the armature (14).
A worm shaft (26) interlocked with the rotation shaft (62); and a drive unit (interposed between the rotation shaft (62) and the worm shaft (26) and interlocked with the rotation shaft (62). 66)
And the worm shaft (2) engaged with the driving portion (66).
6) a driven part (24) interlocked with the driving part (66) and a housing part (70) that houses the driven part (24), and the driving part (70) in the housing part (70). 66) and transmits the rotation from the rotation shaft (62) to the worm shaft (26) in accordance with the engagement state between the driven portion (24) and the worm shaft (26). ), And a bearing (70) for rotatably supporting the driving unit (66).
a) and the bearing part (70a) and the housing part (7).
0) The motor which is formed integrally. 3. The motor according to claim 2, further comprising a support (57) for supporting a worm bearing (72) of the worm shaft (26), wherein the housing (70) is provided with the support (57). ). 4. The motor according to claim 3, wherein the housing part (70) and the bearing part (70a) are formed integrally with the worm bearing part (72).