JP2008172887A - Motor assembling method and device, and motor housing used for same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor assembling method capable of accommodating a rotor in the inner diameter part of a stator without allowing the rotor to come into contact with the stator. <P>SOLUTION: The motor assembling method including the stator 20 arranged to the interior 12 of the housing 10 with an opening part 11 and the rotor 30 arranged in the inner diameter part 21 of the stator 20 includes: forming a through hole 14 on the bottom surface crossing with the axial line of the stator 20 of the housing 10; holding the rotor 30 between a first holding tool 61 inserting through the through hole 14 from the outside of the housing 10 for supporting the center axis of the end part of the rotor 30 and a second holding tool 62 supporting the center axis of the end part of the rotor 30 from the opposite side on the same axial line as the first support tool 61; moving in the axial direction of the stator 20 at least either one of the housing 10 or the rotor 30 held between the first support tool 61 and the second support tool 62 so that the rotor 30 is located in the inner diameter part 21 of the stator 20; and fitting the end part of the rotor 30 on a support part 13 formed on the bottom surface of the housing 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a motor assembling method, a motor casing used in the assembling method, and a motor assembling apparatus.

  As shown in FIG. 5, the motor is assembled by disposing the stator 20 in the inside 112 of the casing 110 having the opening 111 and inserting the rotor 30 into the inner diameter portion 21 of the stator 20. This is done by closing the opening 111 of the 110 with a lid (not shown). Specifically, the rotor 30 having the magnet 32 mounted on the outer periphery of the rotating shaft 31 is inserted into the inner diameter portion 21 of the stator 20 by hand (not shown), and the lower end of the rotating shaft 31 is inserted into the housing 110. The inside 112 of the housing 110 is rotatably fitted, the opening 111 of the housing 110 is closed by a lid, and the upper end of the rotating shaft 31 is rotatably fitted to the lid.

  By the way, in the above assembling method, when inserting the rotor 30 into the inner diameter portion 21 of the stator 20, the rotor 30 is grasped and inserted by hand (not shown). In addition, the magnet 32 of the rotor 30 and the inner diameter portion 21 of the stator 20 may come into contact with each other, and the magnet 32 may be damaged. When heat is applied to the scratched magnet 32 by driving the motor, the rotating shaft 31 made of metal expands and the magnet 32 that is a sintered body contracts, so that stress is applied to the scratch. Concentration and cracking may occur.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a method for assembling a motor that can accommodate the rotor in the inner diameter portion of the stator without the rotor contacting the stator. .

Hereinafter, means for achieving the above-described object and its operation and effects will be described.
The invention according to claim 1 is a method for assembling a motor comprising a stator disposed inside a housing having an opening and a rotor disposed on an inner diameter portion of the stator, A first support that is provided with a through hole in a bottom surface that intersects the axis of the stator, and that is inserted from the outside of the housing into the through hole to support a central axis of an end of the rotor; The rotor is clamped by a second support that supports the central axis of the end of the rotor from the opposite side on the coaxial line, and the casing, the first support, and the second support At least one of the rotors is moved from the opening in the axial direction of the stator so that the rotor is positioned on the inner diameter part of the stator, and the end of the rotor is a support part formed on the bottom surface of the casing. The gist is to fit There.

  According to this configuration, the rotor is accommodated in the inner diameter portion of the stator in a state of being sandwiched between the first support tool and the second support tool. For this reason, when inserting a rotor into a stator, the central axis of a rotor does not shift from the central axis of a stator. Therefore, the rotor does not come into contact with the stator during the movement of the rotor to the inner diameter portion of the stator. Then, by fitting the end portion of the rotor to the support portion of the housing, the rotor is installed on the inner diameter portion of the stator, and after removing the first support tool and the second support tool, the rotor contacts the stator. This can be suppressed.

  According to a second aspect of the present invention, in the motor assembling method according to the first aspect, the first support member may be configured such that the rotor is rotatably mounted integrally with a lid portion that closes the opening. And the second support tool, the rotor is moved so as to be positioned at the inner diameter portion of the stator, and the lid portion is attached to the casing.

  According to this configuration, the rotor is moved to the inner diameter portion of the stator in an integrated state with the lid portion, and both ends of the rotor are rotatably fitted by the support portion formed on the bottom surface of the housing and the lid portion. Is done. For this reason, after a rotor is installed in the internal diameter part of a stator and removing a 1st support tool and a 2nd support tool, it can further suppress that a rotor contacts the internal diameter part of a stator.

  According to a third aspect of the present invention, in the method for assembling the motor according to the second aspect, a fitting portion that can be fitted to either the casing or the lid portion is formed, and the fitting portion The gist is that the lid is attached to the housing by fitting the other.

  According to this configuration, it is possible to prevent the cover portion from being displaced after being attached to the housing by fitting the other into the fitting portion formed on either the housing or the cover portion. Therefore, it is possible to further suppress the rotor from coming into contact with the inner diameter portion of the stator after the rotor is mounted on the inner diameter portion of the stator.

  According to a fourth aspect of the present invention, in the motor assembly method according to any one of the first to third aspects, the center axis of the stator and the central axis of the rotor are located in a vertical direction. Is the gist.

  According to the same configuration, since the central axis of the stator and the central axis of the rotor are positioned in the vertical direction, the rotor is installed on the inner diameter portion of the stator, and the rotor is installed even after the first support tool and the second support tool are removed. Stabilize. Therefore, it is possible to prevent the rotor from coming into contact with the inner diameter portion of the stator after the rotor is mounted on the inner diameter portion of the stator.

  Invention of Claim 5 is used for the assembly method of the motor as described in any one of Claims 1-4, The through-hole which enabled the said 1st support tool to be penetrated is formed in the said bottom face, The gist of the invention is that the stator is a housing of a motor disposed inside.

  According to this configuration, the rotor can be moved to the inner diameter portion of the stator while the rotor is supported on the axis of the stator by the first support member inserted from the outside into the through hole. Therefore, it can suppress that a rotor contacts a stator.

  The invention according to claim 6 is used in the method for assembling the motor according to any one of claims 1 to 4, and sandwiches the fixing base on which the casing is placed and the central axis of the rotor, and the same. A motor assembling apparatus comprising the first support member and the support member having the second support member that move the rotor in the axial direction of the stator disposed in the same casing placed on a fixed base. Is the gist.

  According to this configuration, the rotor can be moved to the inner diameter portion of the stator without contacting the stator.

  According to the present invention, in the motor assembling method, the rotor can be accommodated in the inner diameter portion of the stator without the rotor contacting the stator.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1A, the motor is disposed in a housing 10 having an opening 11, a stator 20 disposed in the interior 12 of the housing 10, and an inner diameter portion 21 of the stator 20. And a lid 40 that closes the opening 11 of the housing 10. The rotor 30 is configured such that a cylindrical magnet 32 having both ends opened is mounted on the outer periphery of the rotating shaft 31.

  As shown in FIG. 1B, the rotary shaft 31 includes a cylindrical large-diameter portion 31a on which the magnet 32 is mounted, and a cylindrical upper small-diameter formed at both ends in the axial direction of the large-diameter portion 31a. It consists of a part 31b and a lower small diameter part 31c. The upper small diameter portion 31b is provided with an upper bearing 33 that can be supported with respect to the lid portion 40, and the lower small diameter portion 31c is provided with a lower bearing 34 that can be supported with respect to the inside 12 of the housing 10. ing. On the end surfaces of the upper small diameter portion 31b and the lower small diameter portion 31c, a mortar-shaped recess (not shown) having a center on the axis of the rotation shaft 31 is formed.

The opening 11 is closed when the lid 40 is attached. The upper small-diameter portion 31 b of the rotor 30 passes through the lid portion 40 and protrudes into a concave portion 41 formed on the upper surface of the lid portion 40.
As shown in FIG. 2, the housing 10 has an opening 11 that opens toward the axial direction of the stator 20 disposed in the inside 12, and the inside so that the stator 20 can be inserted from the opening 11. 12 is formed. In the inside 12 of the housing 10, a through hole 14 having a coaxial axis with the axis of the stator 20 is provided on the bottom surface intersecting the axis of the stator 20, and the through hole 14 is provided from the outside of the housing 10. A columnar first support 61 is inserted. Further, a concave support portion 13 that supports the lower small diameter portion 31 c of the rotating shaft 31 disposed on the inner diameter portion 21 of the stator 20 is formed on the bottom surface of the inside 12 of the housing 10. The inner diameter of the support portion 13 is larger than the inner diameter of the through hole 14 and is substantially the same as the outer diameter of the lower bearing 34 provided in the lower small diameter portion 31c.

Next, an assembly device 50 for assembling the motor will be described with reference to FIGS. 3 (a) and 3 (b).
As shown in FIG. 3A, the assembly device 50 is installed such that the central axis of the stator 20 of the motor to be assembled and the central axis of the rotor 30 are in the vertical direction. The assembling apparatus 50 includes a base 70, a fixing base 71 provided on the base 70, on which the motor housing 10 is placed, and a through hole 14 of the housing 10 placed on the fixing base 71. A first support 61 that is inserted from the outside of the body 10 and supports the end of the rotor 30, that is, the central axis of the end surface of the lower small diameter portion 31c, and the first support 61 from the opposite side on the coaxial line P0. The second support member 62 that supports the end of the rotor 30, that is, the central axis of the end surface of the upper small diameter portion 31 b, and the first support member 61 and the second support member 62 are integrally supported and mounted on the fixed base 71. And a support member 65 that moves in the axial direction of the through hole 14 of the housing 10. A cylindrical first guide shaft 72 and a second guide shaft 73 are extended upward on the base 70, and the support member 65 is vertically moved in the vertical direction by the first guide shaft 72 and the second guide shaft 73. It is mounted movably. The support member 65 is driven up and down in the vertical direction by the actuator 66. 3A and 3B illustrate the case where the support member 65 is in the uppermost position. The first support 61 protrudes in the vertical direction from the upper surface on which the housing 10 of the fixed base 71 is placed in a length substantially the same as the height of the housing 10. The second support tool 62 is provided so as to be movable up and down in the vertical direction by the actuator 63. When the housing 10 and the rotor 30 are placed on the fixed base 71, the second support tool 62 is driven vertically upward to a position where the housing 10 and the rotor 30 can be mounted on the first support tool 61.

  Next, regarding the motor assembling method by the assembling apparatus 50, the fixing base 71, the first support 61, the support member 65, and the second support 62 are viewed from the front of the assembling apparatus 50 as shown in FIGS. This will be described in detail with reference to (d).

  First, FIG. 4A shows a state where the housing 10 is not placed on the fixed base 71. The first support 61 protrudes from the fixed base 71 in the vertical direction. The second support tool 62 is in a position that does not protrude from the surface of the support member 65 that faces the fixed base 71. Here, the tip 61a of the first support 61 and the tip 62a of the second support 62 are respectively formed in a conical shape having a central axis on the axes of both the supports 61 and 62.

  Next, as shown in FIG. 4B, the housing 10 is mounted on the fixed base 71. A stator 20 is disposed in the interior 12 of the housing 10. The housing 10 is inserted into the space between the first support tool 61 and the second support tool 62 so that the central axis of the through hole 14 is positioned on the axis P0 of the first support tool 61 and the second support tool 62. Is done. The housing 10 is moved in the vertical direction and placed on the fixed base 71. The front end 61 a of the first support 61 is substantially at the same position as the upper surface of the housing 10.

  Next, as shown in FIG. 4C, the rotor 30 is sandwiched between the first support 61 and the second support 62. A lid 40 serving as a lid of the housing 10 is mounted in advance on the top of the rotor 30. On the outer edge of the bottom surface of the lid part 40, a fitting part 42 having a small diameter so as to coincide with the inner edge of the opening part 11 of the housing 10 is formed over the entire circumference. The rotor 30 to which the lid portion 40 is attached is provided so as to be rotatable with respect to the lid portion 40 by the upper bearing 33. The upper end portion of the rotor 30, that is, the end surface of the upper small diameter portion 31 b is located in a cylindrical recess 41 formed in the lid portion 40. In this way, the tip 61a of the first support 61 is brought into contact with the lower end of the rotor 30 to which the lid portion 40 is previously attached, that is, the mortar-shaped recess on the end surface of the lower small diameter portion 31c. Then, the second support tool 62 is driven vertically downward to bring the tip end 62a of the second support tool 62 into contact with the upper end portion of the rotor 30, that is, the concave portion of the end surface of the upper small diameter portion 31b. By doing so, the central axis of the rotor 30 is positioned on the axis line P0 of the first support tool 61 and the second support tool 62.

  Next, as shown in FIG. 4D, the rotor 30 is inserted into the inner diameter portion 21 of the stator 20 and the lid portion 40 is attached to the housing 10. The rotor 30 is driven integrally with the support member 65 while being sandwiched from both sides on the axis P0 by the first support tool 61 and the second support tool 62, and is moved so as to be positioned at the inner diameter portion 21 of the stator 20. The That is, the first support tool 61 and the second support tool 62 are moved vertically downward by driving the actuator 66 together with the support member 65 as indicated by white arrows in FIG. Then, as shown in FIG. 4D, the lower bearing 34 provided on the lower small diameter portion 31 c of the rotor 30 is attached to the support portion 13 formed on the bottom surface of the inside 12 of the housing 10. At this time, the rotor 30 does not contact the inner diameter portion 21 of the stator 20 without being displaced from the central axis of the stator 20 while being sandwiched between the first support tool 61 and the second support tool 62. Further, the lid 40 mounted on the upper side of the rotor 30 has an opening of the housing 10 such that the fitting portion 42 formed on the edge of the bottom surface of the lid 40 matches the inner edge of the opening 11 of the housing 10. The part 11 is closed. For this reason, since the rotor 30 is positioned on the inner diameter portion 21 of the stator 20 and the fitting portion 42 of the lid portion 40 is attached to the opening 11 of the housing 10, the magnet 32 of the rotor 30 is attached to the inner diameter of the stator 20 after the attachment. There is no risk of contact with the portion 21. Then, when the second support 62 is moved vertically upward and the assembled motor is lifted vertically upward and taken out, the assembly of the motor is completed.

As described above, according to the embodiment described above, the following effects can be obtained.
(1) Since the rotor 30 is accommodated in the inner diameter portion 21 of the stator 20 with the first support member 61 and the second support member 62 being sandwiched, when the rotor 30 is inserted into the stator 20, the central axis of the rotor 30 Does not deviate from the central axis of the stator 20. Therefore, the rotor 30 does not contact the stator 20 while moving the rotor 30 to the inner diameter portion 21 of the stator 20. Then, when the lower bearing 34 of the rotor 30 is mounted on the support portion 13 of the housing 10, the rotor 30 is installed on the inner diameter portion 21 of the stator 20, and the first support tool 61 and the second support tool 62 are removed. After that, the rotor 30 can be prevented from coming into contact with the stator 20.

  (2) The rotor 30 is moved to the inner diameter portion 21 of the stator 20 in a state of being integrated with the lid portion 40, and the lower side of the rotor 30 is supported by the support portion 13 formed on the bottom surface of the housing 10 and the lid portion 40. The bearing 34 and the upper bearing 33 are rotatably mounted. For this reason, after the rotor 30 is installed in the inner diameter portion 21 of the stator 20 and the first support tool 61 and the second support tool 62 are removed, the rotor 30 is further prevented from contacting the inner diameter portion 21 of the stator 20. Can do.

  (3) By fitting the inner edge of the opening portion 11 of the housing 10 to the fitting portion 42 formed on the lid portion 40, it is possible to suppress the displacement after the lid portion 40 is attached to the housing 10. . Therefore, it is possible to further prevent the rotor 30 from coming into contact with the inner diameter portion 21 of the stator 20 after the rotor 30 is mounted on the inner diameter portion 21 of the stator 20.

  (4) Since the central axis of the stator 20 and the central axis of the rotor 30 are positioned in the vertical direction, the rotor 30 is installed on the inner diameter portion 21 of the stator 20 and the first support tool 61 and the second support tool 62 are removed. However, the rotor 30 is stabilized. Therefore, the rotor 30 can be prevented from coming into contact with the inner diameter portion 21 of the stator 20 after the rotor 30 is mounted on the inner diameter portion 21 of the stator 20.

(5) The assembly method can be performed by using the housing 10 in which the through hole 14 through which the columnar first support 61 is inserted from the outside of the housing 10 is provided in the inside 12.
(6) A base 70, a fixed base 71 provided on the base 70 for mounting the motor casing 10, and the through hole 14 of the casing 10 mounted on the fixing base 71 of the casing 10. A first support 61 that is inserted from the outside and supports the central axis of the end surface of the lower small-diameter portion 31c of the rotor 30, and the upper small-diameter portion 31b of the rotor 30 from the opposite side on the coaxial line P0 with the first support 61. The second support 62 that supports the central axis of the end surface of the housing 10 and the axis of the through hole 14 of the housing 10 that supports the first support 61 and the second support 62 integrally and is mounted on the fixed base 71. The assembling method can be performed by using the assembling apparatus 50 including the supporting member 65 that moves in the direction.

In addition, the said embodiment can be implemented with the following forms which changed this suitably.
In the above embodiment, the rotor 30 is moved in the vertical direction with the rotor 30 held between the first support 61 and the second support 62 with respect to the housing 10 placed on the fixed base 71. However, the housing 10 may be moved instead of the rotor 30.

  In the above embodiment, the mortar-shaped recesses are formed in the end portions of the rotor 30, that is, the end surfaces of the upper small diameter portion 31b and the lower small diameter portion 31c. If the center axis of the rotor 30 can be supported by the tip 62a of the tool 62, it does not need to be formed.

  -In the said embodiment, although the fitting part 42 with which the housing | casing 10 fits was formed in the cover part 40, as the fitting part with which the cover part 40 fits in the housing | casing 10 was formed, You may make it perform fitting with the housing | casing 10 and the cover part 40. FIG.

-Moreover, in the said structure, as long as the housing | casing 10 and the cover part 40 are fixed with a pin etc., you may employ | adopt the structure which abbreviate | omitted the fitting part 42. FIG.
In the above embodiment, the inner diameter of the stator 20 that is sandwiched between the first support 61 and the second support 62 and is disposed in the interior 12 of the housing 10 with the rotor 30 and the lid 40 mounted. However, if the rotor 30 can be installed without being inclined at the inner diameter portion 21 of the stator 20, the lid portion 40 may be separately attached after the rotor 30 is attached. .

  In the above embodiment, the assembling apparatus 50 is installed so that the central axis of the stator 20 of the motor and the central axis of the rotor 30 are in the vertical direction.

(A) The block diagram of a motor, (b) The longitudinal cross-sectional view of a rotor. AA sectional drawing of a housing | casing. (A) Side view of motor assembly apparatus, (b) Front view of motor assembly apparatus. (A)-(d) The figure which shows the assembly method of a motor. Sectional drawing of a rotor and a housing | casing. Sectional drawing of a rotor and a housing | casing.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10,110 ... Housing | casing, 11,111 ... Opening part, 12,112 ... Inside, 13 ... Supporting part, 14 ... Through-hole, 20 ... Stator, 21 ... Inner diameter part, 30 ... Rotor, 31 ... Rotating shaft, 31a ... Large diameter part, 31b ... Upper small diameter part, 31c ... Lower small diameter part, 32 ... Magnet, 33 ... Upper bearing, 34 ... Lower bearing, 40 ... Lid part, 41 ... Recessed part, 42 ... Fitting part, 61 ... First One support, 62 ... second support, 61a, 62a ... tip, 63,66 ... actuator, 65 ... support member, 70 ... base, 71 ... fixed base, 72 ... first guide shaft, 73 ... second guide Axis, P0 ... axis.

Claims (6)

A method for assembling a motor comprising a stator disposed inside a housing having an opening and a rotor disposed on an inner diameter portion of the stator,
A through hole is provided on the bottom surface of the housing that intersects the axis of the stator,
A first support that is inserted into the through-hole from the outside of the housing and supports the central axis of the end of the rotor, and a central axis of the end of the rotor from the opposite side on the same axis as the first support Sandwiching the rotor with the second supporter that supports
At least one of the rotor sandwiched between the casing and the first support member and the second support member is moved in the axial direction of the stator from the opening so that the rotor is positioned on the inner diameter portion of the stator. And assembling the end portion of the rotor to a support portion formed on the bottom surface of the casing. In the method of assembling the motor according to claim 1,
The rotor is clamped by the first support tool and the second support tool in a state in which the rotor is integrally attached to a lid portion that closes the opening so as to be rotatable.
The rotor is moved so as to be positioned on the inner diameter portion of the stator, and the lid portion is attached to the casing. The motor assembly method according to claim 2,
A fitting part that can be fitted to one of the casing and the lid part is formed, and the other part is fitted to the fitting part to attach the lid part to the casing. Assembling method of the motor. In the assembly method of the motor as described in any one of Claims 1-3,
The method of assembling a motor, wherein the motor is performed in a state where a central axis of the stator and a central axis of the rotor are positioned in a vertical direction. It is used for the assembly method of the motor according to any one of claims 1 to 4.
A motor housing, wherein a through-hole through which the first support can be inserted is formed in the bottom surface, and the stator is disposed inside. It is used for the assembly method of the motor according to any one of claims 1 to 4.
A fixed base on which the casing is placed, and the first support member that sandwiches the central axis of the rotor and moves the rotor in the axial direction of the stator disposed in the casing placed on the fixed base And a support member having the second support. A motor assembling apparatus.

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