CN220874294U - Low ripple torque motor - Google Patents
Low ripple torque motor Download PDFInfo
- Publication number
- CN220874294U CN220874294U CN202322685860.0U CN202322685860U CN220874294U CN 220874294 U CN220874294 U CN 220874294U CN 202322685860 U CN202322685860 U CN 202322685860U CN 220874294 U CN220874294 U CN 220874294U
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- shaft core
- base
- torque motor
- low ripple
- ripple torque
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- 229910052742 iron Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a low ripple torque motor, which comprises a base, wherein a cross-connection groove is formed in the base; the stator assembly is arranged on the base; the rotor assembly comprises a rotor shell and a shaft core, wherein the shaft core is rotatably arranged on the base and penetrates through the stator assembly, and the rotor shell is connected with the shaft core; the shaft core is provided with a first end and a second end which are far away from each other, the first end is provided with a limiting part, and the second end penetrates through the rotor shell and is connected in the penetration groove so that the limiting part is propped against the rotor shell; and a magnetic ring is arranged on the rotor shell. After the shaft core of the low ripple torque motor is connected with the rotor shell, the upper and lower limit can be realized by the limit part and the through groove of the base, the rotor shell is prevented from moving up and down, the shaking condition is reduced, the rotating speed stability of the motor is high, and the ripple torque of the motor is small.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a low ripple torque motor.
Background
The motor refers to an electromagnetic device for converting or transmitting electric energy according to the law of electromagnetic induction. Its main function is to convert electric energy into mechanical energy. Along with the continuous improvement of the living standard of people, the intelligent requirements are more and more different, the automobile is used as a traffic tool at ordinary times and is closely related to the living of people, the intelligent automobile is continuously updated to meet the demands of consumers, and the laser radar motor is a high-precision brushless motor used on unmanned automobiles, and has high rotating speed stability, small volume, low noise, small vibration and low power.
However, the ripple torque (rotation speed fluctuation) of the motor in the prior art is large, so that the laser radar point cloud is dithered and unstable, the imaging quality of the point cloud is poor, and the requirements of customers are difficult to meet, and in view of the requirements, we propose a motor with a low ripple torque structure.
Disclosure of utility model
In order to overcome at least one defect of the prior art, the utility model provides a low ripple torque motor, wherein after a shaft core of the motor is connected with a rotor shell, the upper and lower limiting can be realized by a limiting part and a through groove of a base, the rotor shell is prevented from moving up and down, the shaking condition is reduced, the rotating speed stability of the motor is high, and the ripple torque of the motor is small.
The utility model adopts the technical proposal for solving the problems that:
a low ripple torque motor, comprising,
The base is provided with a through groove;
the stator assembly is arranged on the base;
The rotor assembly comprises a rotor shell and a shaft core, wherein the shaft core is rotatably arranged on the base and penetrates through the stator assembly, and the rotor shell is connected with the shaft core; the shaft core is provided with a first end and a second end which are far away from each other, the first end is provided with a limiting part, and the second end penetrates through the rotor shell and is connected in the penetration groove so that the limiting part is propped against the rotor shell; and a magnetic ring is arranged on the rotor shell.
Further, a first positioning part is arranged outside the second end, a second positioning part is arranged in the cross-connection groove, and the second positioning part is used for abutting against the first positioning part after the second end is connected to the cross-connection groove so as to limit the shaft core to move along the axis of the shaft core.
Further, a clamping groove is formed in the outer surface of the second end; a clamping ring is arranged in the cross-connection groove and is used for being clamped into the clamping groove after the second end is connected with the cross-connection groove; the clamping groove is formed in the first positioning portion, and the clamping ring is formed in the second positioning portion.
Further, the limiting part is a limiting step annularly arranged at the first end.
Further, the stator assembly comprises a coil rack, a plurality of coil groups and a plurality of stator iron sheets, wherein the coil rack is sleeved outside the shaft core, and the plurality of coil groups are arranged on the coil rack and distributed at intervals around the circumference of the central axis of the shaft core; and each stator iron sheet is arranged on the coil group in a one-to-one correspondence manner.
Further, a face defining a central axis passing through the shaft core is a central face; the included angle between the side surface of the stator iron sheet in the circumferential direction of the shaft core and the central surface is A, and A is more than 0 degrees and less than or equal to 45 degrees.
Further, a circuit board is arranged on the base and is electrically connected with the coil assembly.
Further, an included angle formed between the magnetizing direction of the magnetic ring and the central axis of the magnetic ring is B, and B is more than 0 degrees and less than or equal to 45 degrees.
Further, a bearing sleeve is arranged on the base, and the shaft core is rotatably arranged in the bearing sleeve in a penetrating manner through a bearing; the stator assembly is arranged outside the bearing sleeve.
Further, a first supporting step is arranged on the inner side of one end of the bearing sleeve; a second supporting step is arranged on the inner side of the other end of the bearing sleeve; an upper bearing and a lower bearing are arranged in the bearing sleeve, and a cushion block propping against the upper bearing is arranged on the rotor shell; the upper bearing is arranged between the first supporting step and the cushion block; the second end is provided with a gasket, and the lower bearing is arranged between the gasket and the second supporting step.
In summary, the utility model has the following technical effects: according to the utility model, when the shaft core is assembled with the rotor shell and the base, the second end of the shaft core can penetrate through the rotor shell and is connected in the through-connection groove of the base, and after the second end is connected to the through-connection groove of the base, the limiting part of the first end of the shaft core is abutted against the rotor shell, so that after the shaft core is assembled with the base and the rotor shell, one end of the shaft core is limited by the through-connection groove of the base, the other end of the shaft core is abutted against the rotor shell by the limiting part, the shaft core cannot generate axial movement, namely, the rotor shell connected with the shaft core cannot generate axial movement, the rotation process of the rotor shell is stable, the shaking condition of the rotor shell is reduced, the rotating speed cannot generate fluctuation due to shaking of the rotor shell, and the ripple wave of the motor is low.
Drawings
FIG. 1 is a schematic cross-sectional view of the present utility model;
FIG. 2 is a schematic view of the internal structure of the present utility model;
FIG. 3 is a schematic diagram of the overall structure of the present utility model;
FIG. 4 is a schematic view of the structure of the shaft core of the present utility model;
fig. 5 is a schematic structural view of the base of the present utility model.
Wherein the reference numerals have the following meanings: 1. a base; 11. a bearing sleeve; 111. a first limit step; 2. a magnetic ring; 3. a stator assembly; 31. a coil assembly; 32. a stator iron sheet; 33. a coil lead; 4. a rotor housing; 41. a cushion block; 5. a shaft core; 51. a limit part; 52. a clamping groove; 53. a gasket; 61. a bearing; 7. a clasp; 9. a circuit board; 10. hall sensor.
Detailed Description
For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.
In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Referring to fig. 1-5, the utility model discloses a low ripple torque motor, which comprises a base 1, a stator assembly 3 and a rotor assembly, wherein a through slot is arranged on the base 1, and the stator assembly 3 is arranged on the base 1. Specifically, the rotor assembly includes a rotor housing 4 and a shaft core 5, the shaft core 5 is rotatably mounted on the base 1, and the shaft core 5 passes through the stator assembly 3.
The rotor shell 4 is connected with the shaft core 5, the shaft core 5 is provided with a first end and a second end which are far away from each other, the first end is provided with a limiting part 51, and the second end passes through the rotor shell 4 and is connected in the through groove so that the limiting part 51 is abutted against the rotor shell 4; the rotor housing 4 is provided with a magnetic ring 2.
On the basis of the structure, when the low ripple torque motor is used, the coil of the stator assembly 3 is electrified, and a changing magnetic field is generated to be matched with the magnetic ring 2 in the rotor shell 4 after the electrification, so that the rotor shell 4 is driven to rotate, and the rotor shell 4 rotates by taking the shaft core 5 as an axis.
Since the second end of the shaft core 5 can pass through the rotor housing 4 and be connected in the through-connection groove of the base 1 when the shaft core 5 is assembled with the rotor housing 4 and the base 1, and the limit part 51 at the first end of the shaft core 5 abuts against the rotor housing 4 after the second end is connected to the through-connection groove of the base 1, one end of the shaft core 5 is limited by the through-connection groove of the base 1 and the rotor housing 4 after the shaft core 5 is assembled with the base 1 and the rotor housing 4, the other end of the shaft core 5 abuts against the rotor housing 4 to limit, the shaft core 5 cannot move axially, namely, the rotor housing 4 connected with the shaft core 5 cannot move axially, the rotation process of the rotor housing 4 is stable, the shaking condition of the rotor housing 4 is reduced, the rotating speed cannot fluctuate due to shaking of the rotor housing 4, and the ripple wave of the motor is low.
In addition, since the second end of the shaft core 5 passes through the rotor housing 4 and then extends into the through-connection groove of the base 1 during assembly, the first end of the shaft core 5 gradually approaches the end of the rotor housing 4 along with the extension of the second end, and after abutting against the rotor housing 4, the shaft core 5 cannot extend into the base 1 any more, that is, the second end can be assembled with the base 1 in place at the position, so that assembly positioning is realized.
Further, the first positioning portion may be further disposed outside the second end, the second positioning portion is disposed in the through groove correspondingly, after the second end is connected to the through groove, the second positioning portion may abut against the first positioning portion to limit the movement of the shaft core 5 along the axis thereof, on the basis of this structure, when the shaft core 5 is assembled with the base 1, the second end of the shaft core 5 is in spacing fit with the first positioning portion and the second positioning portion, and the first end limiting portion 51 of the shaft core 5 is spacing with the rotor housing 4, thereby limiting the axial movement of the shaft core 5 and the rotor housing 4, and stabilizing the rotation process.
More specifically, in this embodiment, the outer surface of the second end is provided with a clamping groove 52, corresponding to the clamping ring 7 in the through groove, after the shaft core 5 is connected to the through groove, the clamping ring 7 may be clamped into the clamping groove 52, on this basis, the clamping groove 52 is formed into a first positioning portion, and the clamping ring 7 is formed into a second positioning portion. Therefore, after the shaft core 5 is assembled to the through groove of the base 1, the clamping ring 7 and the clamping groove 52 can be used for limiting, so that the shaft core 5 is prevented from moving along the axial direction of the shaft core. It should be noted that, the clamping groove 52 is an annular groove, and after the clamping ring 7 is clamped to the annular groove, the axial movement of the shaft core 5 is limited, but the shaft core 5 can rotate normally relative to the base 1.
Of course, the first positioning portion may be a snap ring 7, and the side wall of the through slot may be provided with a clamping slot 52. In addition, the annular step can be arranged at the second end in a protruding way, the annular step is also arranged on the inner wall of the through groove, and the two annular steps can be abutted when in positioning.
Further, the limiting portion 51 is a limiting step arranged at the first end in a surrounding manner, the shaft core 5 can be connected to the through-connection groove in a penetrating manner after penetrating through the rotor housing 4 to limit the shaft core through the first positioning portion and the second positioning portion, and the limiting step abuts against the rotor housing 4 to realize axial positioning, so that axial movement is prevented.
In addition, when the limiting step abuts against the rotor shell 4, the limiting step also indicates that the shaft core 5 is assembled with the base 1 in place, and accordingly an assembly in place prompting function can be achieved.
It should be noted that, the first end of the shaft core 5 may be threaded with a nut structure, and after the shaft core 5 passes through the rotor housing 4 and is connected with the base 1, the nut structure may be formed to abut against the limiting portion 51 on the rotor housing 4. However, in this embodiment, the limiting step is integrally formed at the first end of the shaft core, so that the assembling structure is omitted, and the loosening is not easy to occur due to the assembling structure compared with the nut structure in threaded connection.
Further, the stator assembly 3 in this embodiment includes a coil frame, a plurality of coil groups 31 and a plurality of stator iron sheets 32, the coil frame is sleeved outside the shaft core 5, the coil frame is fixed with the base 1, the shaft core 5 can rotate relative to the coil frame, and the plurality of coil groups 31 are arranged on the coil frame and circumferentially distributed at intervals around the central axis of the shaft core 5; the stator iron sheets 32 are arranged on the coil groups 31 in a one-to-one correspondence manner, so that the plurality of coil groups 31 can generate a magnetic field when being electrified, and the magnetic field is matched with the magnetic ring 2 on the rotor shell 4.
Further, a plane defining a central axis passing through the shaft core 5 is a center plane; the included angle between the side surface of the stator iron sheet 32 in the circumferential direction of the shaft core 5 and the central surface is A, A is more than 0 degrees and less than or equal to 45 degrees, so that a gradient magnetic field is formed, electromagnetic torque and induced electromotive force formed by matching with a rotor are similar to those of the same rotor conducting bar, and the average value of the electromagnetic torque and the induced electromotive force in a section of circumferential range is uniformly distributed, so that harmonic electromotive force generated by tooth harmonic magnetic fields can be effectively weakened, additional torque caused by the harmonic magnetic fields is weakened, and electromagnetic vibration and noise of a motor are effectively reduced.
Further, be equipped with the circuit board on the base 1, circuit board and coil group 31 electric connection, this circuit board can stretch out by base 1, and the convenient wiring, this circuit board can select for use the flexible plate, can also set up hall sensor 10 on the flexible plate and be used for detecting the rotation angle and the rotational speed of motor, and the flexible plate can integrate coil group 31 walk line circuit and hall detection circuit like this to the flexible plate is direct to be derived, reduces and walks the line.
Further, the included angle between the magnetizing direction of the magnetic ring 2 and the central axis of the magnetic ring 2 is B, and B is more than 0 degrees and less than or equal to 45 degrees. Similarly, the motor rotor adopts an inclined magnetizing direction, and the formed electromagnetic torque and induced electromotive force are similar to the average value of the same rotor conducting bar and are uniformly distributed in a section of circumference range, so that the harmonic electromotive force generated by tooth harmonic magnetic fields can be effectively weakened, the additional torque caused by the harmonic magnetic fields is weakened, and the electromagnetic vibration and noise of the motor are effectively reduced.
Of course, the above-mentioned angle A and angle B are limited to the range of 0 deg. -45 deg., so that the formed oblique magnetic field is in a reasonable angle range, and the specific angle range can be selected according to practical requirements.
Further, a bearing sleeve 11 may be further disposed on the base 1, the shaft core 5 rotatably penetrates through the bearing 61 and is disposed in the bearing sleeve 11, and the stator assembly 3 is disposed outside the bearing sleeve 11. In this way, the shaft core 5 is rotatably matched with the base 1 through the bearing 61, so that the rotation is smoother.
Further, a first supporting step is disposed at the inner side of one end of the bearing housing 11, a second supporting step is disposed at the inner side of the other end of the bearing housing 11, two bearings 61 are disposed in the bearing housing 11, the bearing 61 at the first end of the shaft core 5 is an upper bearing 61, and the bearing 61 at the second end of the shaft core 5 is a lower bearing 61. On the basis of this structure, the rotor housing 4 is provided with a pad 41 abutting against an upper bearing 61, and the upper bearing 61 is provided between the first supporting step and the pad 41. A spacer 53 may also be provided at the second end, with a lower bearing 61 provided between the spacer 53 and the second support step.
In this way, the rotation of the shaft core 5 is that the upper bearing 61 and the lower bearing 61 are matched with the bearing sleeve 11 of the base 1, and the rotation is smoother and stable. In addition, since the floating of the upper bearing 61 can be limited by the first supporting step and the spacer 41, and the floating of the lower bearing 61 can be limited by the second supporting step and the spacer 53, the movement of the shaft core 5 caused by the floating of the bearing 61 when the shaft core 5 rotates can be reduced, the rotation process of the shaft core 5 and the rotor housing 4 is smoother, the rotation speed can not be fluctuated due to the shaking of the rotor housing 4, and the ripple wave of the motor is lower.
It should be noted that, the cushion block 41 is selected as an elastic rubber block, so that when the cushion block 41 abuts against the bearing 61, a certain pretension can be performed on the bearing 61, and meanwhile, the bearing 61 is not blocked due to the abutting of the cushion block 41.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.
Claims (10)
1. A low ripple torque motor, characterized by comprising,
The base is provided with a through groove;
the stator assembly is arranged on the base;
The rotor assembly comprises a rotor shell and a shaft core, wherein the shaft core is rotatably arranged on the base and penetrates through the stator assembly, and the rotor shell is connected with the shaft core; the shaft core is provided with a first end and a second end which are far away from each other, the first end is provided with a limiting part, and the second end penetrates through the rotor shell and is connected in the penetration groove so that the limiting part is propped against the rotor shell; and a magnetic ring is arranged on the rotor shell.
2. The low ripple torque motor of claim 1, wherein the second end is provided with a first positioning portion outside, and a second positioning portion is provided in the through slot, and the second positioning portion is configured to abut against the first positioning portion after the second end is connected to the through slot, so as to limit the movement of the shaft core along the axis thereof.
3. The low ripple torque motor of claim 2, wherein the outer surface of the second end is provided with a clamping groove; a clamping ring is arranged in the cross-connection groove and is used for being clamped into the clamping groove after the second end is connected with the cross-connection groove; the clamping groove is formed in the first positioning portion, and the clamping ring is formed in the second positioning portion.
4. The low ripple torque motor of claim 2, wherein the stop is a stop step looped at the first end.
5. The low ripple torque motor of claim 1, wherein the stator assembly comprises a coil former, a plurality of coil groups and a plurality of stator iron sheets, the coil former is sleeved outside the shaft core, and the plurality of coil groups are arranged on the coil former and are circumferentially distributed at intervals around a central axis of the shaft core; and each stator iron sheet is arranged on the coil group in a one-to-one correspondence manner.
6. The low ripple torque motor of claim 5, wherein a face defining a central axis through the shaft core is a central face; the included angle between the side surface of the stator iron sheet in the circumferential direction of the shaft core and the central surface is A, and A is more than 0 degrees and less than or equal to 45 degrees.
7. The low ripple torque motor of claim 5, wherein a circuit board is provided on the base, the circuit board being electrically connected to the coil assembly.
8. The low ripple torque motor of any one of claims 1-7, wherein the magnetizing direction of the magnetic ring forms an angle B with the central axis of the magnetic ring, wherein B is 0 ° < b+.ltoreq.45°.
9. The low ripple torque motor of any one of claims 1 to 7, wherein a bearing housing is provided on the base, and the shaft core is rotatably inserted into the bearing housing through a bearing; the stator assembly is arranged outside the bearing sleeve.
10. The low ripple torque motor of claim 9, wherein a first supporting step is provided inside one end of the bearing housing; a second supporting step is arranged on the inner side of the other end of the bearing sleeve; an upper bearing and a lower bearing are arranged in the bearing sleeve, and a cushion block propping against the upper bearing is arranged on the rotor shell; the upper bearing is arranged between the first supporting step and the cushion block; the second end is provided with a gasket, and the lower bearing is arranged between the gasket and the second supporting step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322685860.0U CN220874294U (en) | 2023-09-28 | 2023-09-28 | Low ripple torque motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322685860.0U CN220874294U (en) | 2023-09-28 | 2023-09-28 | Low ripple torque motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220874294U true CN220874294U (en) | 2024-04-30 |
Family
ID=90808125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322685860.0U Active CN220874294U (en) | 2023-09-28 | 2023-09-28 | Low ripple torque motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220874294U (en) |
-
2023
- 2023-09-28 CN CN202322685860.0U patent/CN220874294U/en active Active
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