CN212183205U

CN212183205U - Improve brushless motor's of torque stationarity rotor structure

Info

Publication number: CN212183205U
Application number: CN202021260727.0U
Authority: CN
Inventors: 聂敬礼; 许领; 聂敬忠
Original assignee: Changzhou Yongpei Electromechanical Technology Co ltd
Current assignee: Changzhou Yongpei Electromechanical Technology Co ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2020-12-18
Anticipated expiration: 2030-07-01

Abstract

The application relates to a rotor structure of a brushless motor for improving torque stability, which comprises a magnetic element rotating around a stator coil in the circumferential direction, and further comprises a rotating cover, an output shaft, a first bearing and a second bearing, wherein the rotating cover comprises an integrally formed rotating ring and a rotating end cover; the inner wall rigid coupling of stator coil has fixed cover, and fixed cover includes integrated into one piece's solid fixed ring and fixed end cover. The application has the effect of improving the stability of the rotor torque.

Description

Improve brushless motor's of torque stationarity rotor structure

Technical Field

The application relates to the technical field of brushless motors, in particular to a rotor structure of a brushless motor for improving torque stability.

Background

The electric flat car is also called electric flat car, cross car, electric rail car, level car and trolley, etc. and is a heavy goods transport vehicle. The vehicle needs the motor to transmit power through the rotating shaft during working, and provides a power source for an execution component of the vehicle. The brushless motor can provide stable high-power output, can accurately control the starting and stopping of the motor, and is widely applied to various electric flat cars and electric sanitation cars.

Chinese patent No. CN205429911U in the prior art discloses a brushless motor, which comprises a casing, a stator core, a shaft, a rotor core, a front cover and a rear cover, wherein the stator core is installed in the casing, a coil is wound on the stator core, magnetic steel is installed in the rotor core, the shaft is installed on the rotor core in a penetrating manner, and two ends of the shaft are respectively matched with the front cover and the rear cover in a rotating manner through bearings. The motor can reduce magnetic loss and improve efficiency.

In view of the above-described related art, the inventors consider that there is a defect that the rotor core rotates at a high speed for a long time without a supporting force, which affects the rotational stability of the rotor.

SUMMERY OF THE UTILITY MODEL

In order to improve the stability of the torque of the rotor, the application provides a rotor structure of a brushless motor for improving the torque stability.

The application provides a brushless motor's that improves torque stationarity rotor structure adopts following technical scheme:

a rotor structure of a brushless motor for improving torque stability comprises a magnetic element rotating around a stator coil in the circumferential direction, and further comprises a rotating cover, an output shaft, a first bearing and a second bearing, wherein the rotating cover comprises a rotating ring and a rotating end cover which are integrally formed, the rotating ring is located on the periphery side of the stator coil, the magnetic element is fixed on the inner wall of the rotating ring, a rotating column is integrally formed at the center position of one side, close to the stator coil, of the rotating end cover, an output hole is formed in the axis of the rotating column, and the output shaft is fixed in the output hole; the inner wall of the stator coil is fixedly connected with a fixed cover, the fixed cover comprises a fixed ring and a fixed end cover which are integrally formed, the fixed ring is positioned on one side of the rotating ring far away from the rotating end cover, the fixed end cover is parallel to the rotating end cover, a fixed column is integrally formed at the center of one side of the fixed end cover close to the stator coil, a through hole is formed on the axis of the fixed column, the end surface of the fixing column close to one end of the fixing end cover is provided with a first mounting groove communicated with the fixing end cover, the first bearing is fixed in the first mounting groove, a second mounting groove is formed in the end face, close to one end of the stator coil, of the fixing column, the second bearing is fixed in the second mounting groove, the inner wall of the stator coil is fixedly connected to the peripheral surface of the fixed column, and the output shaft is matched with the first bearing and the second bearing.

Through adopting above-mentioned technical scheme, when the installation rotor, on being fixed in the inner wall of the swivel becket that rotates the cover with magnetic element, again with output shaft rigid coupling in the delivery outlet, again with two difference rigid couplings of bearing and bearing in mounting groove one and mounting groove two, at last with output shaft rigid coupling on bearing one and bearing two to can make the rotor pass through output shaft and two stable rotation settings of bearing cover fixedly, be favorable to guaranteeing the stationarity of rotor torque.

Preferably, the annular has been seted up on the terminal surface of swivel becket, the annular is followed a week of swivel becket is seted up, arc wall one has all been seted up to the lateral wall of annular both sides, be provided with a plurality of balls in the arc wall one, the ball with gu fixed ring's terminal surface contradicts.

Through adopting above-mentioned technical scheme, utilize the ball to make and be sliding friction between swivel becket and the solid fixed ring, further guaranteed the stationarity that the rotor rotated the in-process.

Preferably, a plurality of evenly distributed's perpendicular groove has been seted up to the bottom surface of annular, erect inslot interference fit stopper rod, the stopper rod is kept away from the one end of erecting the groove is located in the annular, adjacent two all be provided with between the stopper rod the ball.

Through adopting above-mentioned technical scheme, utilize the gag lever post to make the ball can only remove between two adjacent gag lever posts, be favorable to guaranteeing that each position of swivel becket terminal surface has the ball all the time, reduce the possibility that the ball takes place the gathering.

Preferably, one side of the ring groove close to the inner wall of the rotating ring is provided with a notch, and the width of the notch is larger than the diameter of the ball.

Through adopting above-mentioned technical scheme, when the installation ball, can place the ball in arc wall one through the opening, the operating personnel of being convenient for operates.

Preferably, the end face of the fixing ring is provided with a second arc-shaped groove, the second arc-shaped groove is formed along the periphery of the fixing ring, and the ball is abutted against the second arc-shaped groove.

Through adopting above-mentioned technical scheme, utilize arc wall two, can make the ball roll in solid fixed ring's arc wall two, further guaranteed the stationarity of ball on solid fixed ring.

Preferably, a ring table is disposed on a peripheral surface of the fixing column, the ring table is communicated with an end surface of the fixing column near one end of the stator coil, and the stator coil is fixed on the ring table.

Through adopting above-mentioned technical scheme, utilize the ring platform, can fix stator coil on the ring platform, and then be favorable to the degree of accuracy of stator coil mounted position, be favorable to guaranteeing that stator coil fixes at preset position.

Preferably, a plurality of heat dissipation holes are formed in the rotating cover and the fixing cover.

Through adopting above-mentioned technical scheme, utilize the louvre can distribute out the heat that the stator coil produced, reduce because of rotating the work that the heat in cover and the fixed cover is more and influence the motor.

In summary, the present application includes at least one of the following beneficial technical effects:

by arranging the rotating cover, when the rotor is installed, the magnetic element is fixed on the inner wall of the rotating ring of the rotating cover, the output shaft is fixedly connected into the output hole, the first bearing and the second bearing are fixedly connected into the first mounting groove and the second mounting groove respectively, and finally the output shaft is fixedly connected onto the first bearing and the second bearing, so that the rotor can be stably arranged on the fixed cover through the output shaft and the two bearings, and the stability of the torque of the rotor is favorably ensured;

through the arrangement of the balls, sliding friction can be realized between the rotating ring and the fixed ring by utilizing the balls, and the stability of the rotor in the rotating process is further ensured;

3. through setting up the gag lever post, utilize the gag lever post can make the ball can only remove between two adjacent gag lever posts, be favorable to guaranteeing that each position of swivel becket terminal surface has the ball all the time, reduce the possibility that the ball takes place the gathering.

Drawings

FIG. 1 is a schematic view of a rotor structure in an embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1, mainly illustrating the configuration of the ring groove.

Fig. 3 is a schematic structural diagram of the fixing cover in the application embodiment.

Fig. 4 is a schematic view of the mounting of the rotor structure in the example of the application.

Description of reference numerals: 1. a stator coil; 201. a magnetic element; 21. a rotating cover; 211. a rotating ring; 2111. a ring groove; 2112. a first arc-shaped groove; 2113. a ball bearing; 2114. a vertical slot; 2115. a limiting rod; 2116. opening the gap; 212. rotating the end cover; 213. rotating the column; 2131. an output aperture; 22. an output shaft; 23. a first bearing; 24. a second bearing; 3. a fixed cover; 31. a fixing ring; 311. an arc-shaped groove II; 32. fixing an end cover; 33. fixing a column; 331. a through hole; 332. a first mounting groove; 333. a second mounting groove; 334. a ring platform; 401. heat dissipation holes; 5. a motor end cover; 6. a motor cover.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a rotor structure of a brushless motor for improving torque stability. Referring to fig. 1, a rotor structure of a brushless motor for improving torque smoothness includes a magnetic element 201, a rotating cover 21, an output shaft 22, a first bearing 23, and a second bearing 24. The stator coil 1 is provided in the rotating cover 21, and the stator coil 1 is fixed to the fixed cover 3.

As shown in fig. 1, the rotating cover 21 includes an integrally formed rotating ring 211, a rotating end cap 212, and a rotating post 213. The rotating ring 211 is annular and has a rectangular cross section, the magnetic elements 201 are fixedly connected to the inner wall of the rotating ring 211, the magnetic elements 201 are multiple and uniformly distributed along a circle of the rotating ring 211, the stator coil 1 is positioned in the rotating ring 211 and close to the magnetic elements 201, and the stator coil 1 is electrified to drive the magnetic elements 201 to move and further drive the rotating ring 211 to rotate; the rotating end cover 212 is positioned at one side of the rotating ring 211 and is parallel to the stator coil 1, and the rotating end cover 212 is provided with a heat dissipation hole 401; the rotating column 213 is cylindrical, the rotating column 213 is integrally formed on the side wall of the rotating end cover 212 close to the stator coil 1, the axis of the rotating column 213 is collinear with the axis of the stator coil 1, an output hole 2131 is formed on the axis of the rotating column 213, the output hole 2131 penetrates through two sides of the rotating end cover 212 and two ends of the rotating column 213, and the output shaft 22 is fixedly connected in the output hole 2131.

As shown in fig. 1, the fixing cover 3 includes a fixing ring 31, a fixing end cap 32, and a fixing post 33, which are integrally formed. The fixed ring 31 is positioned on one side of the rotating ring 211 far away from the rotating end cover 212, and the inner diameter and the outer diameter of the fixed ring 31 are consistent with those of the rotating ring 211; the fixed end cover 32 is positioned on one side of the fixed ring 31 far away from the rotating ring 211, the fixed end cover 32 is parallel to the stator coil 1, and the fixed end cover 32 is also provided with a heat dissipation hole 401; the fixed column 33 is integrally formed on the side wall of the fixed end cover 32 close to one side of the stator coil 1, the fixed column 33 is cylindrical, the axis of the fixed column 33 is collinear with the axis of the rotating column 213, a through hole 331 is formed in the axis of the fixed column 33, the through hole 331 penetrates through two sides of the fixed end cover 32 and two ends of the fixed column 33, a first mounting groove 332 is formed in the end face of the fixed column 33 far away from one end of the stator coil 1, the first mounting groove 332 is communicated with the fixed end cover 32, the first bearing 23 is fixedly connected into the first mounting groove 332, a second mounting groove 333 is formed in the end face of the fixed column 33 close to one end of the stator coil 1, the second bearing 24 is fixedly. In addition, a ring platform 334 is arranged on the outer peripheral surface of the fixed column 33, the ring platform 334 is communicated with the end surface of one end, close to the stator coil 1, of the fixed column 33, and the stator coil 1 is fixedly connected to the ring platform 334.

When the rotor is installed, the magnetic element 201 is fixed on the inner wall of the rotating ring 211 of the rotating cover 21, the output shaft 22 is fixedly connected into the output hole 2131, the first bearing 23 and the second bearing 24 are respectively fixedly connected into the first mounting groove 332 and the second mounting groove 333, and finally the output shaft 22 is fixedly connected onto the first bearing 23 and the second bearing 24, so that the rotor can be stably arranged on the fixed cover 3 through the output shaft 22 and the two bearings, and the stability of the rotor torque is favorably ensured.

As shown in fig. 1 and 2, a ring groove 2111 is provided on the end face of the end of the rotation ring 211, which is far away from the end cover 212, the ring groove 2111 is provided along a circle of the rotation ring 211, first arc-shaped grooves 2112 are symmetrically provided on the side walls of the two sides of the ring groove 2111, balls 2113 are provided in the first arc-shaped grooves 2112, vertical grooves 2114 are provided on the bottom surface of the ring groove 2111, the vertical grooves 2114 are a plurality of and are uniformly distributed along a circle of the ring groove 2111, limit rods 2115 are in interference fit in the vertical grooves 2114, one end of each limit rod 2115, which is far away from the vertical groove 2114, is located in the ring groove 2111, and balls. Furthermore, the method is simple. One side of the annular groove 2111 close to the inner wall of the rotating ring 211 is provided with a notch 2116, the notch 2116 is rectangular, the width of the notch 2116 is larger than the diameter of the ball 2113, and when the ball 2113 is installed, the ball 2113 can be placed in the first arc-shaped groove 2112 through the notch 2116, so that the operation of an operator is facilitated. Further, as shown in fig. 3, an arc-shaped groove two 311 is formed in an end surface of the fixing ring 31 on the side away from the fixing end cover 32, and the ball 2113 abuts against the arc-shaped groove two 311. The balls 2113 can make sliding friction between the rotating ring 211 and the fixed ring 31, so that the stability of the rotor in the rotating process is further ensured.

As shown in fig. 4, the rotating cover 21 is rotatably disposed on the fixed cover 3, the motor end cover 5 is fixedly connected to one side of the fixed cover 3 away from the rotating cover 21, the motor cover 6 is fixedly connected to the motor end cover 5, the fixed cover 3 and the rotating cover 21 are located in the motor cover 6, the output shaft 22 of the rotor structure penetrates through one side of the motor cover 6 away from the motor end cover 5, and the rotor structure can be protected by the motor cover 6.

The implementation principle of the rotor structure of the brushless motor for improving torque stability in the embodiment of the application is as follows: when the rotor is installed, the magnetic element 201 is fixed on the inner wall of the rotating ring 211 of the rotating cover 21, the output shaft 22 is fixedly connected into the output hole 2131, the first bearing 23 and the second bearing 24 are fixedly connected into the first mounting groove 332 and the second mounting groove 333 respectively, and finally the output shaft 22 is fixedly connected onto the first bearing 23 and the second bearing 24, in addition, the rotating cover 21 is in sliding connection with the fixed cover 3 through the balls 2113, so that the rotor is stably arranged on the fixed cover 3 through the output shaft 22 and the two bearings, the rotating cover 21 and the fixed cover 3 are also arranged in a sliding manner, and the stability of the torque of the rotor is favorably ensured.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A rotor structure of a brushless motor for improving torque smoothness, comprising a magnetic element (201) which rotates circumferentially around a stator coil (1), characterized in that: the rotor structure further comprises a rotating cover (21), an output shaft (22), a first bearing (23) and a second bearing (24), wherein the rotating cover (21) comprises a rotating ring (211) and a rotating end cover (212) which are integrally formed, the rotating ring (211) is positioned on the peripheral side of the stator coil (1), the magnetic element (201) is fixed on the inner wall of the rotating ring (211), a rotating column (213) is integrally formed at the center position of the rotating end cover (212) close to one side of the stator coil (1), an output hole (2131) is formed in the axis of the rotating column (213), and the output shaft (22) is fixed in the output hole (2131); a fixed cover (3) is fixedly connected to the inner wall of the stator coil (1), the fixed cover (3) comprises a fixed ring (31) and a fixed end cover (32) which are integrally formed, the fixed ring (31) is positioned on one side, far away from the rotating end cover (212), of the rotating ring (211), the fixed end cover (32) is parallel to the rotating end cover (212), a fixed column (33) is integrally formed at the central position, close to one side of the stator coil (1), of the fixed end cover (32), a through hole (331) is formed in the axis of the fixed column (33), a first mounting groove (332) communicated with the fixed end cover (32) is formed in the end face, close to one end of the fixed end cover (32), of the fixed column (33), a first bearing (23) is fixed in the first mounting groove (332), a second mounting groove (333) is formed in the end face, close to one end of the stator coil (, the second bearing (24) is fixed in the second mounting groove (333), the inner wall of the stator coil (1) is fixedly connected to the peripheral surface of the fixed column (33), and the output shaft (22) is matched with the first bearing (23) and the second bearing (24).

2. The rotor structure of a brushless motor for improving torque smoothness according to claim 1, wherein: seted up annular (2111) on the terminal surface of rotating ring (211), annular (2111) is followed a week of rotating ring (211) is seted up, arc wall (2112) have all been seted up to the lateral wall of annular (2111) both sides, be provided with a plurality of balls (2113) in arc wall (2112), ball (2113) with the terminal surface of solid fixed ring (31) is contradicted.

3. The rotor structure of a brushless motor for improving torque smoothness according to claim 2, wherein: a plurality of evenly distributed's perpendicular groove (2114) has been seted up to the bottom surface of annular (2111), it has gag lever post (2115) to erect interference fit in groove (2114), gag lever post (2115) is kept away from the one end of erecting groove (2114) is located in annular (2111), adjacent two all be provided with between gag lever post (2115) ball (2113).

4. The rotor structure of a brushless motor for improving torque smoothness according to claim 2, wherein: one side of the annular groove (2111) close to the inner wall of the rotating ring (211) is provided with a notch (2116), and the width of the notch (2116) is greater than the diameter of the ball (2113).

5. The rotor structure of a brushless motor for improving torque smoothness according to claim 2, wherein: an arc-shaped groove II (311) is formed in the end face of the fixing ring (31), the arc-shaped groove II (311) is formed along the periphery of the fixing ring (31), and the ball (2113) is abutted to the arc-shaped groove II (311).

6. The rotor structure of a brushless motor for improving torque smoothness according to claim 1, wherein: the peripheral surface of the fixed column (33) is provided with a ring platform (334), the ring platform (334) is communicated with the end surface of one end, close to the stator coil (1), of the fixed column (33), and the stator coil (1) is fixed on the ring platform (334).

7. The rotor structure of a brushless motor for improving torque smoothness according to claim 1, wherein: a plurality of heat dissipation holes (401) are formed in the rotating cover (21) and the fixing cover (3).