WO2018153046A1

WO2018153046A1 - Motor

Info

Publication number: WO2018153046A1
Application number: PCT/CN2017/099667
Authority: WO
Inventors: 黄洋波; 金建伟; 胡辉; 廖明刚; 陈挥秀
Original assignee: 中山大洋电机股份有限公司
Priority date: 2017-02-23
Filing date: 2017-08-30
Publication date: 2018-08-30
Also published as: CN206559160U

Abstract

A plastic package motor, comprising a motor end cover. The motor end cover comprises an end cover body (1) and a ball bearing (2); a bearing seat (12) protrudes out of the middle of the end cover body (1); a bearing chamber (121) is provided in the bearing seat (12); the ball bearing (2) comprises an outer race (21), an inner race (22), and balls mounted between the outer race (21) and the inner race (22); the end cover body (1) is made of metal; the bottom of the bearing chamber (121) is equipped with an insulating cover (5); the ball bearing (2) is put in the bearing chamber (121), and the outer race (21) is supported outside the insulating cover (5); the insulating cover (5) shields an aperture (32) between the outer race (21) and the inner race (22); a relief groove (52) is provided inside the insulating cover (5); the the inner race (22) and the insulating cover are separated by the relief groove; a gap (21) exists between an inner sidewall (1211) of the bearing chamber (121) and the outer race (21); a plastic package (4) is injection-molded in the gap (31); the inner sidewall (1121) of the bearing chamber (121) and the outer race (21) are connected and fixed together by the plastic packet (4). The motor is simply structured, reduces the requirements for the precision of the inner circle of the bearing chamber and the coaxial precision between the inner cycle of the bearing chamber and the bearing, and reduces manufacturing costs.

Description

a motor

Technical field:

The utility model relates to a motor.

Background technique:

The existing plastic-sealed motor comprises a metal end cover, a rotating shaft, a rotor assembly and a plastic-sealed stator. The rotating shaft is sleeved in a rotor assembly. The plastic-sealed stator comprises a stator assembly and a plastic-clad outer casing. The plastic-sealed outer casing is provided with a cavity, and the rotor assembly is embedded. The sleeve is mounted in the cavity, the metal end cover comprises an end cover cover body, a bearing chamber is protruded from the center of the end cover cover body, and a bearing is installed in the bearing chamber, and the rotating shaft is supported on the bearings of the two end covers. In order to achieve insulation and electrical corrosion between the bearing and the metal end cover, the inner wall surface of the bearing chamber is covered with an insulating layer, and the insulating layer is made of high-strength plastic steel material. When the motor is working, the relative displacement between the bearing chamber and the bearing will occur, which will cause the motor shaft to move. Therefore, the accuracy of the indoor circle of the bearing, the coaxiality of the bearing circle and the bearing during the design and production are required. It is very high, and the addition of an insulating layer causes the relative displacement between the bearing chamber and the bearing to occur more frequently, which increases the difficulty of production and design and increases the production cost.

Summary of the invention:

The purpose of the utility model is to provide a motor which has low requirements on the circularity of the bearing inner circle and can prevent displacement between the bearing inner circle and the bearing.

The object of the present invention is achieved by the following technical solutions.

The purpose of the utility model is to provide a motor, comprising a motor end cover, the motor end cover comprises an end cover body and a ball bearing, and a straight step stop is arranged at the edge of the end cover body, and protrudes outward in the middle of the end cover body. a bearing housing is disposed in the bearing housing, wherein the ball bearing comprises a bearing outer ring, a bearing inner ring and a ball mounted between the bearing outer ring and the bearing inner ring, wherein the end cap body is made of metal, the bearing chamber An insulating cover is mounted on the bottom, the ball bearing is placed in the bearing chamber, and the outer ring of the bearing is supported on the outer side of the insulating cover, and the insulating cover blocks the gap between the outer ring of the bearing and the inner ring of the bearing, and the inner side of the insulating cover is disposed There is a sump, the sump is spaced apart from the insulating cover, and there is a gap between the inner side wall of the bearing chamber and the outer ring of the bearing, and a plastic body is injection molded in the gap, and the plastic sealing body is used for the bearing chamber The inner side wall and the The outer ring of the bearing is connected and fixed.

A through hole for passing the rotating shaft is disposed in the middle of the bearing seat, and an inner edge of the insulating cover is provided with a boss in the through hole and is in close contact with the inner wall of the through hole.

The outer edge of the insulating cover protrudes from the annular side wall, and the annular side wall is sleeved on the outer side surface of the outer ring of the bearing.

The annular side wall is in contact with the molding body.

The object of the present invention can also be achieved as follows: an electric machine comprising a plastic-sealed stator and a ball bearing, the plastic-sealed stator comprising a stator core, an end insulation, a coil winding and a plastic-clad casing, the plastic-sealed casing end Extending to the center to form a plastic end cap body, and a bearing seat is protruded outwardly in the middle of the plastic end cap body, the ball bearing comprises a bearing outer ring, a bearing inner ring and a ball mounted between the bearing outer ring and the bearing inner ring, The outer side of the outer ring of the bearing is plastically sealed in the bearing seat, and an insulating cover is arranged between the top surface of the outer ring of the bearing and the bearing seat, and the insulating cover blocks the gap between the outer ring of the bearing and the inner ring of the bearing, and the inner side of the insulating cover is provided There is a shelter, and the escape slot separates the inner ring of the bearing from the insulating cover.

A through hole for passing the rotating shaft is disposed in the middle of the bearing seat, and an inner edge of the insulating cover is plastically sealed on the inner wall of the through hole.

The object of the present invention can also be achieved as follows: an electric machine comprising a plastic-sealed stator and a ball bearing, the plastic-sealed stator comprising a stator core, an end insulation, a coil winding and a plastic-clad casing, the plastic-sealed casing end Extending to the center to form a plastic end cap body, and a bearing seat is protruded outwardly in the middle of the plastic end cap body, the ball bearing comprises a bearing outer ring, a bearing inner ring and a ball mounted between the bearing outer ring and the bearing inner ring, The ball bearing outer casing has an insulating cover, and the insulating cover is in close contact with the outer side surface of the bearing outer ring and blocks a gap between the outer ring of the bearing and the inner ring of the bearing, and the inner side of the insulating cover is provided with a hollow groove, and the empty space groove The inner ring of the bearing is separated from the insulating cover, and the insulating cover is plastically sealed in the bearing housing.

The outer edge of the insulating cover is radially protruded with a flange, and the flange is embedded in the plastic end cap body.

a through hole for passing the rotating shaft is arranged in the middle of the bearing seat, and an inner edge of the insulating cover is plastically sealed at The inner wall of the through hole.

Compared with the prior art, the utility model has the following effects:

1) In the motor, the end cover connects and fixes the inner side wall of the bearing chamber and the outer ring of the bearing through the plastic sealing body, and the structure is simple, avoiding displacement between the ball bearing and the bearing chamber when the motor is working, and reducing the bearing Indoor round precision, bearing indoor circle and ball bearing coaxial accuracy requirements reduce production costs;

2) The bearing outer ring is supported on the outer side of the insulating cover, the insulating cover blocks the gap between the outer ring of the bearing and the inner ring of the bearing, and the inner space of the insulating cover separates the inner ring of the bearing from the insulating cover, and the insulating cover can not only It can realize the insulation and anti-corrosion between the ball bearing and the metal end cover, and can prevent the plastic and the bottom and the inside of the ball bearing when the high-temperature injection molding is performed, which reduces the difficulty of injection molding;

3) The inner edge of the insulating cover is provided with a boss in the through hole and is in close contact with the inner wall of the through hole, which strengthens the insulation between the rotating shaft and the metal end cover.

4) In the motor, one end of the plastic sealing shell extends toward the center to form a plastic end cap body, so that the plastic sealing end cap body and the plastic sealing shell are integrally formed, the process is reduced, and the outer side surface of the bearing outer ring is plastically sealed in the bearing seat. The precision requirement of the plastic end cap body is reduced, and the production cost is saved.

5) In the motor, the end cap body and the plastic sealing shell are integrally formed, the process is reduced, and the bearing outer ring is fixed in the bearing seat through the insulating cover, thereby reducing the precision requirement of the plastic sealing end cap body and saving the production cost. The insulating cover covers the entire bearing outer ring, further reducing the difficulty of injection molding.

BRIEF DESCRIPTION OF THE DRAWINGS:

Figure 1 is a cross-sectional view of the motor of the first embodiment of the present invention;

Figure 2 is a perspective view of the motor end cover according to the first embodiment of the present invention;

3 is a schematic structural view of the inner side of the motor end cover according to the first embodiment of the present invention;

Figure 4 is a cross-sectional view taken along line A-A of Figure 3;

Figure 5 is an enlarged view of B of Figure 4;

Figure 6 is a perspective view showing the appearance of a plastic-sealed stator of the motor according to the second embodiment of the present invention;

Figure 7 is a cross-sectional view of the molded stator according to the second embodiment of the present invention;

Figure 8 is an enlarged view of a portion C of Figure 7;

Figure 9 is a cross-sectional view of the molded stator according to the third embodiment of the present invention;

Fig. 10 is an enlarged view of a portion D of Fig. 9.

detailed description:

The present invention will be further described in detail below through the specific embodiments and the accompanying drawings.

Embodiment 1:

As shown in FIG. 1 to FIG. 5, the embodiment provides a motor end cover including a motor end cover. The motor end cover includes an end cover body 1 and a ball bearing 2, and is disposed at an edge of the end cover body 1 A stepped seat 11 protrudes outwardly from the end cover body 1 with a bearing housing 12. The bearing housing 12 is provided with a bearing chamber 121. The ball bearing 2 includes a bearing outer ring 21, a bearing inner ring 22 and a bearing outer ring. The ball 23 between the bearing 21 and the inner ring 22 of the bearing, the end cap body 1 is made of metal, and the bottom of the bearing chamber 121 is provided with an insulating cover 5, and the ball bearing 2 is placed in the bearing chamber 121 and outside the bearing The ring 21 is supported on the outer side of the insulating cover 5. The insulating cover 5 blocks the gap 32 between the bearing outer ring 21 and the bearing inner ring 22. The inner side of the insulating cover 5 is provided with a cutout groove 53. The ring 22 is spaced apart from the insulating cover 5, and a gap 31 exists in the inner side wall 1211 of the bearing chamber 121 and the bearing outer ring 21, and a molded body 4 is injection molded in the gap 31, and the plastic sealing body 4 will be the bearing chamber 121 The inner side wall 1211 is connected and fixed to the bearing outer ring 21.

In the motor of the embodiment, the end cover 1 connects and fixes the inner side wall 1211 of the bearing chamber 121 and the bearing outer ring 21 through the molding body 4, and has a simple structure, and avoids the operation between the ball bearing 2 and the bearing chamber 121 when the motor is in operation. The displacement is also reduced, the accuracy of the inner circle of the bearing chamber 121, the inner circle of the bearing chamber 121 and the coaxial precision of the ball bearing 2 are reduced, and the production cost is reduced; the insulating cover 5 can realize not only the ball bearing 2 and the metal end cover 1 The insulation and anti-corrosion can prevent the plastic injection of the plastic part 4 at the bottom and the inside of the ball bearing 2, which reduces the difficulty of injection molding.

A through hole 122 through which the rotating shaft 7 passes is disposed in the middle of the bearing housing 12, and an inner edge 51 of the insulating cover 5 is provided with a boss 55 located in the through hole 122 and in close contact with the inner wall of the through hole 122. The boss 55 reinforces the insulation of the shaft 7 from the metal end cap 1.

The outer edge of the insulating cover 5 protrudes from the annular side wall 52, and the annular side wall 52 is sleeved on the outer side surface of the bearing outer ring 21.

The annular side wall 52 is in contact with the molding body 4.

Embodiment 2:

As shown in FIG. 6 to FIG. 8 , the motor provided by the embodiment includes a molded stator 6 and a ball bearing 2, and the molded stator 6 includes a stator core 61, an end insulation 62, a coil winding 63 and a plastic casing. 64. One end of the plastic sealing shell 64 extends toward the center to form a plastic end cap body 10, and a bearing seat 12 protrudes outwardly in the middle of the plastic end cap body 10. The ball bearing 2 includes a bearing outer ring 21, a bearing inner ring 22, and The ball 23 is mounted between the bearing outer ring 21 and the bearing inner ring 22, and the outer side surface of the bearing outer ring 21 is molded in the bearing housing 12, and an insulating cover 5 is arranged between the top surface of the bearing outer ring 21 and the bearing housing 12. The insulating cover 5 blocks the gap 32 between the bearing outer ring 21 and the bearing inner ring 22, and the inner side of the insulating cover 5 is provided with a cutout groove 53, and the cutout groove 53 separates the bearing inner ring 22 from the insulating cover 5.

A through hole 122 through which the rotating shaft 7 passes is disposed in the middle of the bearing housing 12, and an inner edge 51 of the insulating cover 5 is molded on the inner wall of the through hole 122.

In the motor of the embodiment, the plastic sealing end cap body 10 and the plastic sealing shell 64 are integrally formed, the process is reduced, and the outer side surface of the bearing outer ring 12 is plastically sealed in the bearing housing 12, thereby reducing the precision requirement of the plastic sealing end cap body 10. , saving production costs.

Embodiment 3:

As shown in FIG. 9 and FIG. 10, the motor provided by the embodiment includes a plastic stator 6 and a ball bearing 2, and the plastic stator 6 includes a stator core 61, an end insulation 62, a coil winding 63 and a plastic casing. 64. One end of the plastic sealing shell 64 extends toward the center to form a plastic end cap body 10, and a bearing seat 12 protrudes outwardly in the middle of the plastic end cap body 10. The ball bearing 2 includes a bearing outer ring 21 and a bearing inner ring 22 And a ball 23 mounted between the bearing outer ring 21 and the bearing inner ring 22, the ball bearing 2 is covered with an insulating cover 5, the insulating cover 5 is in close contact with the outer side surface of the bearing outer ring 21 and blocks the bearing a gap 32 between the ring 21 and the inner ring 22 of the bearing, the inner side of the insulating cover 5 is provided with a cutout 53 which separates the bearing inner ring 22 from the insulating cover 5, and the insulating cover 5 is molded in the bearing housing Inside.

The outer edge of the insulating cover 5 has a flange 54 protruding from the outer edge thereof, and the flange 54 is embedded in the plastic end cap 10.

In the motor of the embodiment, the end cap body 10 and the plastic sealing shell 64 are integrally formed, the process is reduced, and the bearing outer ring 21 is fixed in the bearing housing 12 through the insulating cover 5, thereby reducing the precision of the plastic sealing end cap body 10. The production cost is saved; the insulating cover 5 covers the entire bearing outer ring 21, which further reduces the difficulty of injection molding.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and scope of the present invention are equivalent. The manner of replacement is included in the scope of protection of the present invention.

Claims

A motor comprising a motor end cover, the motor end cover comprising an end cover body (1) and a ball bearing (2), and a straight step stop (11) is provided at an edge of the end cover body (1) at the end cover body (1) a bearing housing (12) protrudes from the middle, and a bearing chamber (121) is disposed in the bearing housing (12), the ball bearing (2) includes a bearing outer ring (21), a bearing inner ring (22), and A ball (23) mounted between the bearing outer ring (21) and the bearing inner ring (22), characterized in that the end cap body (1) is made of metal, and the bearing chamber (121) is provided with an insulating cover at the bottom (5) The ball bearing (2) is placed into the bearing chamber (121), and the bearing outer ring (21) is supported on the outer side of the insulating cover (5), and the insulating cover (5) blocks the bearing outer ring ( 21) A gap (32) with the inner ring of the bearing (22), a cutout (53) is provided on the inner side of the insulating cover (5), and the inner ring (22) and the insulating cover are provided by the cutout (53) ( 5) spaced apart, a gap (31) exists in the inner side wall (1211) of the bearing chamber (121) and the bearing outer ring (21), and a plastic body (4) is injection molded in the gap (31), the plastic body (4) The inner side wall (1211) of the bearing chamber (121) is connected and fixed to the bearing outer ring (21).
A motor according to claim 1, characterized in that: a through hole (122) through which the rotating shaft (7) passes is provided in the bearing housing (12), and an inner edge of the insulating cover (5) (51) A boss (55) is provided in the through hole (122) and is in close contact with the inner wall of the through hole (122).
A motor according to claim 1 or 2, characterized in that the outer edge of the insulating cover (5) protrudes from the annular side wall (52), and the annular side wall (52) fits over the outer ring of the bearing (21) On the outer side.
A machine according to claim 3, wherein the annular side wall (52) is in contact with the molding body (4).
A motor comprising a molded stator (6) and a ball bearing (2), the molded stator (6) comprising a stator core (61), an end insulation (62), a coil winding (63) and a plastic casing (64) And characterized in that: one end of the plastic sealing shell (64) extends toward the center to form a plastic end cap body (10), and a bearing seat (12) protrudes outwardly in the middle of the plastic end cap body (10), the ball bearing ( 2) comprising a bearing outer ring (21), a bearing inner ring (22) and a ball (23) mounted between the bearing outer ring (21) and the bearing inner ring (22), the bearing outer ring (21) outside The side is molded in the bearing housing (12), and the top surface of the bearing outer ring (21) is An insulating cover (5) is disposed between the bearing housings (12), and the insulating cover (5) blocks a gap (32) between the bearing outer ring (21) and the bearing inner ring (22), and the insulating cover (5) The inner side is provided with a cutout (53), and the cutout (53) separates the bearing inner ring (22) from the insulating cover (5).
A motor according to claim 5, wherein said bearing housing (12) is provided with a through hole (122) through which the rotating shaft (7) passes, and an inner edge of said insulating cover (5) (51) ) is molded on the inner wall of the through hole (122).
A motor according to claim 5 or 6, wherein the outer edge of the insulating cover (5) protrudes from the annular side wall (52), and the annular side wall (52) fits over the outer ring of the bearing (21) On the outer side.
A motor comprising a molded stator (6) and a ball bearing (2), the molded stator (6) comprising a stator core (61), an end insulation (62), a coil winding (63) and a plastic casing (64) And characterized in that: one end of the plastic sealing shell (64) extends toward the center to form a plastic end cap body (10), and a bearing seat (12) protrudes outwardly in the middle of the plastic end cap body (10), the ball bearing ( 2) comprising a bearing outer ring (21), a bearing inner ring (22) and a ball (23) mounted between the bearing outer ring (21) and the bearing inner ring (22), the ball bearing (2) outer casing is insulated a cover (5), the insulating cover (5) is in close contact with the outer side surface of the bearing outer ring (21) and blocks a gap (32) between the bearing outer ring (21) and the bearing inner ring (22), and is insulated The inner side of the cover (5) is provided with a cutout (53), and the inner recess (53) separates the inner bearing ring (22) from the insulating cover (5), and the insulating cover (5) is plastically sealed in the bearing housing.
A motor according to claim 8, characterized in that the outer edge of the insulating cover (5) is radially protruded with a flange (54), and the flange (54) is embedded in the plastic end cap body ( 10) inside.
A motor according to claim 8 or 9, wherein the bearing housing (12) is provided with a through hole (122) through which the rotating shaft (7) passes, and an inner edge of the insulating cover (5) (51) is molded on the inner wall of the through hole (122).