JP2001211598A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor provided with an inexpensive seal member sealing the inside of the motor and the inside of an outside instrument by one seal member and facilitating the assembling. SOLUTION: The motor 10 is composed of a cylindrical yoke 30 with a bottom housing a rotor 20, an end plate 40 mounted on the yoke 30 by a fitting piece 42 fitted resiliently on the inner peripheral part 38 of the opening part 36 of the yoke 30 and closing an opening part, and a seal member 50 arranged on the flange 39 of the opening part side of the yoke on the outer peripheral side of the end plate 40 and enclosing the inside of the outside instrument with the end face of the outside instrument coupled flange 39 and provided with an annular seal part 52 and a hole 54 with a bottom annularly holding the seal part 52 by an outside tool.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor provided with a seal member for sealing a space between a mounted motor and an external device.

[0002]

2. Description of the Related Art Generally, a seal between a contact of an external device and a motor to be mounted, that is, a seal against the inside of the external device is provided by an end plate for closing an end face of the external device or an opening of a yoke constituting the motor. This can be done by providing an annular groove on the end face and fitting an O-ring into the recess, or by applying a liquid sealant between both end faces.

However, the former method increases the cost of the motor by processing the groove with relatively high precision and using an expensive O-ring, and the elasticity of the O-ring makes it easy to deform, so that the mounting in the groove is difficult. It's not easy. In the latter case, since the sealant is in a liquid state, it is not easy to apply the sealant, and a liquid sealant having large dimensional variation is interposed between the motors in the axial direction. Not applicable to few motors and attached external equipment.

[0004] Further, both of them are provided with an O-ring for sealing between the end plate and the yoke in order to prevent water from entering the inside of the motor. Therefore, two seal members are used together with the above-mentioned seal member, which contributes to an increase in the cost of the motor.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides
An object of the present invention is to provide a motor provided with an inexpensive seal member that seals the inside of a motor and the inside of an external device with one seal member and that can be easily assembled and has high dimensional accuracy in the axial direction.

[0006]

According to a first aspect of the present invention, a motor includes a bottomed cylindrical yoke having a bottom and a cylindrical portion, and a motor resiliently fitted to an inner peripheral portion on the opening side of the yoke. An end plate mounted on the yoke with a mating fitting piece to close the opening, and an end plate disposed on the outer peripheral side of the end plate and on the end surface of the yoke on the opening side, and coupled to the end surface of the yoke. A rubber seal member for sealing the inside of the external device between the end face of the external device and a seal member having an annular seal portion and a holding portion for holding the seal portion in an annular shape with an external tool. And that it comprises.

According to a second aspect of the present invention, in the motor according to the first aspect, the holding portion is a recess formed inside the seal portion and inward of the yoke. Make a summary.

[0008] The invention described in claim 3 is the first and second inventions.
The gist of the present invention is that the seal member has an engagement portion that engages with the engaged portion of the end plate or the yoke.

According to a fourth aspect of the present invention, in the motor according to the third aspect, the engaged portion is a concave portion formed in the end plate, and the engaging portion is formed inside the seal portion. The gist of the present invention is that the convex portion is formed.

[0010] The invention described in claim 5 provides the invention according to claims 1 to 4.
The gist of the present invention is that the end plate has a flat contact surface that directly contacts an end surface of the external device.

[0011]

According to the first aspect of the present invention, the motor has a bottomed cylindrical yoke having a bottom portion and a cylindrical portion, and a fitting which is resiliently fitted to the inner peripheral portion of the yoke on the opening side. An end plate attached to the yoke by a piece to close the opening, and an external device disposed on an outer peripheral side of the end plate and on an end surface on the opening side of the yoke and connected to the end surface of the yoke. A rubber seal member is provided for sealing the inside of the external device between the end face and the outer device, the annular seal portion and a holding portion for holding the seal portion in an annular shape by an external tool. . Therefore, the motor and the external device are sealed between the yoke on which the end plate is placed on the inside and the external device, and the inside of the motor and the inside of the external device are sealed by one sealing member. Further, since the seal member is made of rubber and is annular, it is easily deformed. However, the annular shape is maintained by holding the seal member with the holding portion by an external tool. Can be easily mounted on the flange which is the end face of the rim.

According to the second aspect of the present invention, the holding portion is a recess formed inside the seal portion and toward the inside of the yoke. Therefore, since the holding portion does not protrude to the outer diameter side of the motor, it is possible to meet a demand for downsizing the motor. Further, since it does not protrude in the axial direction of the motor, there is no need to provide a concave portion or the like corresponding to the external device, and no new structure is imposed on the external device.

According to the third aspect of the present invention, the seal member has an engaging portion that engages with the engaged portion of the end plate or the yoke. Therefore, the annular seal member does not rotate in the circumferential direction.

According to the invention described in claim 4, the engaged portion is a concave portion formed in the end plate, and the engaging portion is a convex portion formed inside the seal portion. Therefore, since the engaged portion and the engaging portion do not protrude toward the outer diameter side of the motor, it is possible to meet a demand for downsizing the motor. Further, since it does not protrude in the axial direction of the motor, there is no need to provide a concave portion or the like corresponding to the external device, and no new structure is imposed on the external device.

According to the fifth aspect of the present invention, the end plate is formed with a flat contact surface that directly contacts the end face of the external device. Therefore, in the axial direction of the motor, there is no liquid sealant or the like whose degree of deformation is unknown, so that the dimensional variation is reduced and the present invention can be applied to the present small motor requiring high dimensional accuracy.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the present invention will be described below with reference to FIGS. The motor 10 according to the embodiment of the present invention is
As shown in FIG. 1, the rotor 20, a bottomed cylindrical iron yoke 30 having a bottom portion 32 and a cylindrical portion 34 that house the rotor 20 therein, and an inner peripheral portion 38 of an opening 36 of the yoke 30.
An iron end plate 40 for closing the opening 36 attached to the yoke 30 by a fitting piece 42 that resiliently fits into the yoke 30. It is arranged on a flange 39 which is an end face, and seals the inside of the external device between the flange 39 and an end face of an external device (not shown). Are four recessed holes 54 which are annularly held by an external tool (not shown) as holding portions and are arranged at equal intervals.
, And a rubber seal member 50 made of EPDM material or the like.

Here, the end plate 40 is substantially disc-shaped as shown in FIGS. 1 and 2 as viewed from A in FIG. 1 and FIG. 3 as viewed from C in FIG. On the side of the motor 10, the brush device 60 is held by being pinched by a protruding piece 47 at the tip of a fitting piece 42, which will be described later. Have been. Also, as shown in FIG.
The fitting piece 42 bent from the outer peripheral side toward the axial direction of the motor 10 and a stopper abutting on the flange 39 for positioning the end plate 40 in the axial direction as shown in FIG. 1 or FIG. A portion 44 is formed.
With this configuration, the fitting plate 42 is fitted and inserted into the inner peripheral portion 38 of the yoke until the stopper portion 44 comes into contact with the flange 39 so that the end plate 40 is elastically fixed to the yoke 30. Is done. further,
The end plate 40 is provided with the seal member 50 having a through hole 46 as a concave portion of the engaged portion which penetrates in the axial direction at a position lowered in the axial direction of the motor 10 from the contact surface 49. A holding piece 48 for holding is formed.

The flange 39 of the yoke 30 is
As shown in FIG.
0, and is formed with a through hole 39a for a bolt for connecting the motor 10 to the external device.
Are formed.

Further, the seal member 50 is formed so as to be thicker than the axial thickness of the end plate 40, and is set such that a sealing pressure is secured when the end plate 40 is connected to the external device. The seal member 50 has a through-hole seal portion 56 that covers the outer periphery of the through-hole 39a. The bottomed hole 54 of the seal member 50
As shown in FIG. 4 and FIG. 5 which is a cross-sectional view taken along the line BB of FIG. 4, four extending pieces 58 extending toward the inner diameter side of the motor 10 are formed, and the extending pieces 58 project in the axial direction of the motor 10. As a result, a protruding piece 59 is formed as a projection of the engaging portion that is press-fitted into the through hole 46. That is, the outer diameter of the projecting piece 59 is set smaller than the inner diameter of the through hole 46.

In the above structure, the sealing member 50
Is mounted on the flange 39 on the outer peripheral side of the end plate 40 by a tool from the contact surface 49 side with respect to the motor 10 on which the end plate 40 is mounted. That is, first, convex portions provided on a tool (not shown) are inserted into the four bottomed holes 54 arranged at equal intervals and held in an annular shape, and then the seal member 50 is moved to the motor side. The mounting is completed by disposing the projecting piece 59 into the through-hole 46 by press-fitting the projecting piece 59 into the through-hole 46 and finally moving the tool toward the non-motor side. Even when the tool is moved to the side opposite to the motor, the sealing member 50 remains on the flange 39 because the protruding piece 59 is pressed into the through hole 46.

According to the embodiment described above, the motor 10
The yoke 30 and the inner peripheral portion 38 of the opening 36 of the yoke 30
An end plate 40 attached to the yoke 30 by a fitting piece 42 elastically fitted to the yoke 30 and closing the opening 36; and an end plate 40 disposed on the flange 39 on the outer peripheral side of the end plate 40. For sealing the inside of the external device between an end face of the external device and the bottom surface of the annular device, and a bottomed hole 54 as a holding portion for holding the seal portion 52 in an annular shape by an external tool. Is provided with a rubber seal member 50 provided with a. Therefore, the motor 10 and the external device are connected to the end plate 40.
Is sealed between the yoke 30 on which the motor 1 is mounted and the external device, and the motor 1 is sealed by one sealing member 50.
0 and the inside of the external device are sealed. Further, since the seal member 50 is made of rubber and has an annular shape, the seal member 50 is easily deformed.
By holding the seal member 50 at 4, the annular shape is maintained, and the arrangement on the flange 39 on the outer peripheral side of the end plate 40 and the end surface of the yoke 30 is facilitated.

The bottomed hole 54 is provided in the sealing portion 5.
2 is a concave portion formed inside and toward the inside of the yoke 30. Therefore, since the bottomed hole 54 as the holding portion does not protrude toward the outer diameter side of the motor 10, it is possible to meet the demand for downsizing the motor 10. In addition, since it does not protrude in the axial direction of the motor 10, there is no need to provide a concave portion or the like corresponding to the external device, and a new structure is not imposed on the external device.

Further, the seal member 50 is formed with a protruding piece 59 as a projection of an engaging portion which engages with the through hole 46 which is a concave portion of the engaged portion of the end plate 40 or the yoke 30. ing. Therefore, the annular sealing member 50 does not rotate in the circumferential direction, and the through-hole sealing portion 56 does not shift with respect to the through-hole 39a.

The end plate 40 has a flat contact surface 49 which is in direct contact with the end face of the external device.
Since no liquid sealant or the like whose deformation degree is unknown is interposed between the external device and the motor 10 in the axial direction, the dimensional variation in the axial direction is small, and high dimensional accuracy is required. Applicable to current small motors.

[0025]

As described in detail above, according to the present invention,
The motor 10 and the external device are sealed between the yoke 30 and the external device in a state where the end plate 40 is placed on the inner side, and the inside of the motor 10 and the inside of the external device are sealed by one seal member 50. Will be sealed. Further, since the seal member 50 is made of rubber and has an annular shape, the seal member 50 is easily deformed.
By holding the seal member 50 at 4, the arrangement of the seal member 50 on the flange 39 becomes easy. Further, since the bottomed hole 54 is a recess formed inside the seal portion 52 and toward the inside of the yoke 30, the bottomed hole 54 as the holding portion is provided outside the motor 10. Since it does not protrude to the radial side, it is possible to meet the demand for downsizing the motor 10. In addition, since it does not protrude in the axial direction of the motor 10, there is no need to provide a concave portion or the like corresponding to the external device, and a new structure is not imposed on the external device. Further, the end plate 4 is attached to the sealing member 50.
Since the projecting piece 59 is formed as a projection of the engaging portion that engages with the through hole 46 that is a concave portion of the 0 engaged portion, the annular seal member 50 can rotate in the circumferential direction. As a result, the through hole sealing portion 56 does not shift with respect to the through hole 39a. In addition, the external device and the motor 10
Are in direct contact with each other, so that variations in the axial dimension are small.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a motor 10 according to the present invention.

FIG. 2 is an A view in FIG. 1;

FIG. 3 is a view as viewed from C in FIG. 2;

FIG. 4 is a view as viewed from B in FIG. 1;

FIG. 5 is a sectional view taken along the line DD of FIG. 4;

[Explanation of symbols]

10 motor, 20 rotor, 30 yoke, 32
... bottom part, 34 ... cylindrical part, 36 ... opening part, 38 ... inner peripheral part, 39 ... flange, 39a ... through hole, 40 ... end plate, 42 ... fitting piece, 44 ... stopper part, 46
... through-hole, 47 ... projecting piece, 48 ... holding piece, 49 ... contact surface, 50 ... sealing member, 52 ... sealing part, 54 ... bottomed hole, 56 ... through-hole sealing part, 58 ... extension piece, 59 ...
Projection piece, 60 ... Brush device

Claims (5)

[Claims] An opening formed by a cylindrical yoke having a bottom and a cylindrical portion, and a fitting piece resiliently fitted to an inner peripheral portion of the yoke on the opening side; The inside of the external device is sealed between an end plate that closes the end plate and an end surface of the external device that is disposed on the outer peripheral side of the end plate and that is on the opening side of the yoke and that is coupled to the end surface of the yoke. A motor comprising: an annular seal portion; and a rubber seal member provided with a holding portion for annularly holding the seal portion by an external tool. 2. The motor according to claim 1, wherein the holding portion is a recess formed inside the seal portion and toward the inside of the yoke. 3. The motor according to claim 1, wherein the seal member has an engaging portion that engages with the engaged portion of the end plate or the yoke. 4. The device according to claim 3, wherein the engaged portion is a concave portion formed in the end plate, and the engaging portion is a convex portion formed inside the seal portion. Motor. 5. The motor according to claim 1, wherein the end plate has a flat contact surface that directly contacts an end surface of the external device.