CN217545731U - High-coaxiality assembly structure of middle-placed motor - Google Patents
High-coaxiality assembly structure of middle-placed motor Download PDFInfo
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- CN217545731U CN217545731U CN202221491824.XU CN202221491824U CN217545731U CN 217545731 U CN217545731 U CN 217545731U CN 202221491824 U CN202221491824 U CN 202221491824U CN 217545731 U CN217545731 U CN 217545731U
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Abstract
The utility model discloses a high-coaxiality assembly structure of a centrally-mounted motor, which comprises a motor box body, wherein the two ends of the motor box body are respectively detachably assembled and provided with an A end cover and a B end cover; a stator support is integrated in the motor box body and is a revolving body; the middle shaft is coaxial with the stator support; the outer wall of the middle shaft is in running fit with the stator support through a bearing A; a power output sleeve is rotatably arranged outside the middle shaft through a B bearing; the utility model discloses a structure is compared in the assembly structure before improving compacter, and further assurance the axiality between motor stator-rotor and the axis.
Description
Technical Field
The utility model belongs to the power-assisted bicycle field.
Background
The assembly structure of the middle motor of the improved power-assisted bicycle is shown in figure 2, the axle centers of the end covers at the two ends of the motor box body are in running fit with the main shaft through at least one bearing, when in assembly, the two end covers have rigid constraint effect on the axis of the main shaft, and the stator and the rotor of the motor are arranged on the motor box body; because the two ends of the motor box body are fixed with the end covers through the flange bolts, the connection mode of the flange bolts has certain errors on the positioning of the coaxiality, so that the two end covers can form positioning interference on the main shaft, and the coaxiality between the motor stator and the motor rotor and the main shaft cannot be ensured with high precision.
It should be noted that the background art is only a structural optimization point for better explaining the present solution, and does not represent that all the contents of the background art are the prior art.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the not enough of existence among the prior art, the utility model provides a put high axiality assembly structure of motor in, guaranteed the axiality between motor stator-rotor and the axis.
The technical scheme is as follows: in order to achieve the purpose, the high-coaxiality assembly structure of the middle motor comprises a motor box body, wherein an A end cover and a B end cover are respectively detachably mounted at two ends of the motor box body; a stator support is integrated in the motor box body and is a revolving body; the middle shaft is coaxial with the stator support; the outer wall of the middle shaft is in running fit with the stator support through a bearing A; a power output sleeve is rotatably arranged outside the middle shaft through a B bearing;
a bearing hole at the axle center of the end cover B is rotationally matched with the outer wall of the power output sleeve through a bearing C; the inner ring of the stator support is in running fit with the outer wall of the middle shaft through a D bearing; the axle center of the end cover A is in sliding sealing fit with the outer wall of the middle shaft through a flexible sealing ring.
Further, a motor stator and a motor rotor are also arranged in the motor box body; the motor stator is coaxially fixed on the stator support, and the motor rotor is in running fit with the stator support through the E bearing.
Furthermore, one end of the power output sleeve is synchronously connected with the output chain wheel through a first spline.
Furthermore, the end cover A and the end cover B are respectively fixed at two ends of the motor box body through a plurality of flange bolts A and a plurality of flange bolts B.
Furthermore, a force transmission sleeve is coaxially sleeved outside the middle shaft; the middle shaft is in transmission fit with one end of the force transmission sleeve through a first one-way clutch; the other end of the power output sleeve is synchronously connected with the force transmission sleeve through a second spline; the motor rotor is connected with the motor rotor through a shaft B, and the motor rotor is connected with the motor rotor through a shaft B; the planetary gear carrier is coaxially matched with the outer wall of the power output sleeve in a transmission manner through a second one-way clutch.
Furthermore, the planetary gear comprises a large gear and a small gear which are coaxially integrated, the large gear is meshed with the central gear, and the small gear is meshed with the gear ring.
Has the advantages that: the utility model discloses a structure is compared in the assembly structure before improving compacter, and further assurance the axiality between motor stator-rotor and the axis, and meanwhile the implementation degree of difficulty in the concrete in-process of increase assembly process is not showing.
Drawings
FIG. 1 is an improved assembly structure;
fig. 2 shows an assembly structure before modification.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The assembly structure of the middle motor of the improved power-assisted bicycle is shown in figure 2, the axle centers of the end covers at the two ends of the motor box body are in running fit with the main shaft through at least one bearing, when in assembly, the two end covers have rigid constraint effect on the axis of the main shaft, and the stator and the rotor of the motor are both arranged on the motor box body; because the two ends of the motor box body are fixed with the end covers through the flange bolts, the flange bolts have certain errors in the positioning of the coaxiality, so that the two end covers can form positioning interference on the main shaft, and the coaxiality between the motor stator and the motor rotor and the main shaft cannot be guaranteed with high precision.
The improved assembly structure is shown in figure 1, the high-coaxiality assembly structure of the centrally-mounted motor comprises a motor box body 21, and an A end cover 25 and a B end cover 13 are respectively detachably assembled at two ends of the motor box body 21; specifically, the end cover A25 and the end cover B13 are respectively fixed at two ends of the motor box body 21 through a plurality of flange bolts A23 and a plurality of flange bolts B15; a stator support 24 is integrated in the motor box body 21, and the stator support 24 is a revolving body; the middle shaft 5 is coaxial with the stator support 24; the outer wall of the middle shaft 5 is in running fit with the stator support 24 through the bearing A2; a power output sleeve 8 is rotatably arranged outside the middle shaft 5 through a bearing B9, and one end of the power output sleeve 8 is synchronously connected with an output chain wheel 14 through a first spline 50; a bearing hole at the axle center of the end cover B13 is in running fit with the outer wall of the power output sleeve 8 through a bearing C10; the inner ring of the stator support 24 is in running fit with the outer wall of the middle shaft 5 through a D bearing; the axle center of the end cover A25 is in sliding seal fit with the outer wall of the middle axle 5 through a flexible sealing ring 1; a motor stator 22 and a motor rotor 20 are also arranged in the motor box body 21; the motor stator 22 is coaxially fixed to the stator support 24, and the motor rotor 20 is rotatably fitted to the stator support 24 through an E bearing 40.
In the structure, although the end cover B13 is fixed at one end of the motor box body 21, the axis of the end cover B13 is matched with the middle shaft 5 through the flexible sealing ring 1, and the flexible sealing ring 1 has elasticity, so that the end cover B13 has no rigid constraint effect on the axis of the middle shaft 5, and the problem that the two end covers interfere with the axis positioning of the main shaft does not exist; meanwhile, the motor stator 22 and the motor rotor 20 are directly coaxially positioned with the middle shaft 5 through the stator support 24, the A bearing 2 and the E bearing 40, and are not indirectly positioned through an intermediate structure, so that the assembly precision is further improved, and therefore, the coaxiality of the motor stator and the motor rotor and the main shaft of the improved assembly structure can be ensured and is more reliable than that before improvement.
The specific transmission structure in the assembly structure is as follows:
two ends of the middle shaft 5 are used for connecting pedal cranks and are used for being driven by a manual pedal; the output chain wheel 14 is connected with the rear wheel of the bicycle through chain transmission; a force transmission sleeve 4 is coaxially sleeved outside the middle shaft 5; the middle shaft 5 is in transmission fit with one end of the force transmission sleeve 4 through the first one-way clutch 3; the other end of the power output sleeve 8 is synchronously connected with the force transmission sleeve 4 through a second spline 7; the motor also comprises a planetary gear train consisting of a sun gear 6, a planetary gear 19, a ring gear 17 and a planetary gear carrier 16, wherein the ring gear 17 is fixed on the B end cover 13, and the sun gear 6 is synchronous with a motor rotor 20; the planet gear carrier 17 is coaxially matched with the outer wall of the power output sleeve 8 in a transmission way through the second one-way clutch 11; the planetary gear comprises a large gear and a small gear which are coaxially integrated, the large gear is engaged with the central gear, and the small gear is engaged with the gear ring; the device also comprises a sensor capable of detecting the torque and the rotating speed of the force transmission sleeve 4, wherein the sensor for detecting the rotating speed is a Hall rotating speed sensor, and a sensor resistance strain gauge type torque sensor for detecting the torque; when the power transmission device works, the manpower applies torque to the main shaft 7, the main shaft 7 transmits the torque from the manpower to the force transmission sleeve 4 through the first one-way clutch 3, and the force transmission sleeve 4 transmits the torque to the power output sleeve 8; meanwhile, the torque sensor senses that torque exists on the force transmission sleeve 4 and then sends a signal to the controller, then the controller drives the motor rotor 20 to output the torque, so that the sun gear 6 is driven to rotate, then the torque is transmitted through the planetary gear train and amplified, the planetary gear carrier 17 rotates, and the amplified torque is transmitted to the power output sleeve 8 through the second one-way clutch 11 by the planetary gear carrier 17; finally, the power output sleeve 8 transmits the torque from the manpower and the torque from the motor to the output chain wheel 14 together, so as to drive the bicycle to run and achieve the effect of assisting power.
The above description is only a preferred embodiment of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the invention, and such modifications and enhancements are intended to be within the scope of the invention.
Claims (6)
1. Put high axiality assembly structure of motor, its characterized in that: the motor box comprises a motor box body (21), wherein an A end cover (25) and a B end cover (13) are detachably mounted at two ends of the motor box body (21) in a box closing mode respectively; a stator support (24) is fixed in the motor box body (21), and the stator support (24) is a revolving body; the stator also comprises a middle shaft (5) which is coaxial with the stator support (24); the middle shaft (5) is in running fit with the stator support (24) through the A bearing (2); a power output sleeve (8) is rotatably arranged outside the middle shaft (5) through a B-bearing (9);
a bearing hole at the axle center of the end cover B (13) is in running fit with the outer wall of the power output sleeve (8) through a bearing C (10); the inner ring of the stator support (24) is in running fit with the outer wall of the middle shaft (5) through a D bearing; the axle center of the end cover A (25) is in sliding sealing fit with the outer wall of the middle axle (5) through a flexible sealing ring (1).
2. The high-coaxiality assembling structure of the mid-motor according to claim 1, wherein: a motor stator (22) and a motor rotor (20) are also arranged in the motor box body (21); the motor stator (22) is coaxially fixed on the stator support (24), and the motor rotor (20) is in running fit with the stator support (24) through an E bearing (40).
3. The high-coaxiality assembling structure of the centrally installed motor according to claim 1, wherein: one end of the power output sleeve (8) is synchronously connected with the output chain wheel (14) through a first spline (50).
4. The high-coaxiality assembling structure of the center motor according to claim 2, wherein: the A end cover (25) and the B end cover (13) are respectively fixed at two ends of the motor box body (21) through a plurality of A flange bolts (23) and a plurality of B flange bolts (15).
5. The high-coaxiality assembling structure of the centrally installed motor according to claim 2, wherein: a force transmission sleeve (4) is coaxially sleeved outside the middle shaft (5); the middle shaft (5) is in transmission fit with one end of the force transmission sleeve (4) through the first one-way clutch (3); the other end of the power output sleeve (8) is synchronously connected with the force transmission sleeve (4) through a second spline (7); the planetary gear train is composed of a sun gear (6), a planetary gear (19), a gear ring (17) and a planetary gear carrier (16), wherein the gear ring (17) is fixed on the end cover B (13), and the sun gear (6) is synchronous with a motor rotor (20); the planet gear carrier (16) is coaxially matched with the outer wall of the power output sleeve (8) in a transmission way through the second one-way clutch (11).
6. The high-coaxiality assembling structure of the center motor according to claim 2, wherein: the planetary gear (19) comprises a large gear (19.1) and a small gear (19.2) which are coaxially integrated, the large gear (19.1) is meshed with the central gear (6), and the small gear (19.2) is meshed with the gear ring (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221491824.XU CN217545731U (en) | 2022-06-15 | 2022-06-15 | High-coaxiality assembly structure of middle-placed motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221491824.XU CN217545731U (en) | 2022-06-15 | 2022-06-15 | High-coaxiality assembly structure of middle-placed motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217545731U true CN217545731U (en) | 2022-10-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221491824.XU Active CN217545731U (en) | 2022-06-15 | 2022-06-15 | High-coaxiality assembly structure of middle-placed motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217545731U (en) |
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2022
- 2022-06-15 CN CN202221491824.XU patent/CN217545731U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: High coaxiality assembly structure for central motors Effective date of registration: 20230322 Granted publication date: 20221004 Pledgee: Bank of China Co.,Ltd. Wuxi High tech Industrial Development Zone Branch Pledgor: WUXI TRUCKRUN INTELLIGENT MOTOR Co.,Ltd. Registration number: Y2023980035768 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |