Micromotor

Abstract

The utility model discloses a micromotor, which is characterized in that the micromotor comprises a motor main body and a Hall assembly, the motor main body comprises a first shell, a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft respectively extend from two ends of the first shell and extend along a first direction, and the first rotating shaft and the second rotating shaft coaxially rotate; the Hall assembly comprises a second shell, a Hall element plate and a Hall rotor, the Hall element plate and the Hall rotor are arranged in the second shell, the Hall rotor is rotatably arranged in the second shell, and the Hall rotor directly faces the Hall element plate; wherein the Hall rotor comprises a rotating shaft sleeve and magnetic steel, a through cavity extending in the first direction is formed in the rotating shaft sleeve, the magnetic steel is arranged in an opening in one end, close to the Hall element plate, of the through cavity, and an opening in the other end, away from the Hall element plate, of the through cavity sleeves the first rotating shaft. According to the micromotor designed by the utility model, the output angles of the rotating shaft of the micromotor can be ensured to be consistent while the cost is reduced, and the micromotor has good popularization prospect and application value.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a micro motor. Background Art

[0002] As we all know, micromotors have many varieties, complex specifications, and a wide range of market applications. They are a high-tech industry that integrates multiple disciplines such as motors, microelectronics, power electronics, computers, automatic control, and precision machinery. In particular, the application of electronic technology and new materials technology has promoted the advancement of micromotor technology.

[0003] Currently, micromotors are an important component of power electronic equipment. In some specific implementation situations, micromotors are required to be able to effectively adjust the output shaft position of their own shafts to make the output shaft rotation angle consistent, thereby meeting equipment requirements.

[0004] However, due to the small size of micromotors, manual adjustment of the micromotor's shaft position is extremely difficult and unreliable. Therefore, visual scanning equipment is currently commonly used to scan the micromotor's shaft's shaft rotation angle and control the micromotor's shaft rotation adjustment based on the scanning structure. However, this method is expensive and has low scanning efficiency, making it quite inconvenient in actual use. Therefore, a new micromotor is currently being sought that can use a more cost-effective and easy-to-implement method to adjust the micromotor's shaft rotation angle to ensure consistent shaft position. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a tensile testing fixture for a micro motor, which solves the problems of high cost and inconvenience in implementation of the existing means of detecting and controlling the output angle of the micro motor shaft using visual scanning technology by optimizing its own structure.

[0006] In order to solve the above technical problems, the technical solution of the utility model is as follows: a micro motor, comprising: a motor body and a Hall assembly, the motor body comprising a first housing and a first rotating shaft and a second rotating shaft extending from both ends of the first housing and extending in a first direction, the first rotating shaft and the second rotating shaft rotating coaxially;

[0007] The Hall assembly includes a second shell and a Hall element plate and a Hall rotor arranged in the second shell. The Hall rotor is rotatably arranged in the second shell and is arranged opposite to the Hall element plate. The Hall rotor includes a rotating sleeve and a magnet. A through cavity extending along a first direction is defined in the rotating sleeve. The magnet is arranged in an opening at one end of the through cavity close to the Hall element plate, and the other end of the through cavity away from the Hall element plate is sleeved on the first rotating shaft.

[0008] Furthermore, in the micromotor described in the present invention, both end openings of the through cavity are D-shaped, the outer contour of the magnetic steel is D-shaped, and the cross-sectional outer contour of the first rotating shaft is D-shaped.

[0009] Furthermore, in the micromotor described in the present invention, the Hall element plate includes a circuit board and a plurality of Hall elements, and the plurality of Hall elements are arrayed on the circuit board along a second direction, and the second direction is the extension direction of the straight line segment of the "D"-shaped outer contour of the magnetic steel.

[0010] Furthermore, in the micromotor described in the present invention, the magnetic steel includes a first permanent magnet and a second permanent magnet, and the first permanent magnet and the second permanent magnet are symmetrically arranged along a symmetry axis perpendicular to the second direction. The outer surface of the first permanent magnet on the side close to the Hall element plate is an N pole, and the outer surface of the second permanent magnet on the side close to the Hall element plate is an S pole.

[0011] Furthermore, in the micromotor described in the present invention, the rotating sleeve includes a first connecting portion and a second connecting portion extending along a first direction, the first connecting portion and the second connecting portion are connected to each other, and the outer contours of the first connecting portion and the second connecting portion are both circular.

[0012] Furthermore, in the micromotor described in the present invention, the diameter of the circular outer contour of the first connecting portion is greater than the diameter of the circular outer contour of the second connecting portion.

[0013] Furthermore, in the micromotor described in the present invention, the cross-sectional area of the through cavity in the first connecting portion is larger than the cross-sectional area of the through cavity in the second connecting portion.

[0014] Furthermore, in the micromotor described in the present invention, the magnetic steel is provided in the first connecting portion, and the second connecting portion is sleeved on the first rotating shaft.

[0015] Furthermore, in the micromotor described in the present invention, the through cavity in the second connecting portion includes a first cavity and a second cavity that are connected to each other, the second cavity is sleeved on the first rotating shaft, and the cross-sectional area of the first cavity is smaller than the cross-sectional area of the second cavity.

[0016] Furthermore, in the micromotor described in the present invention, the second housing includes a mounting shell and an end cover provided on one side of the mounting shell, and the Hall element plate is fixed to the end cover provided on the mounting shell by screws.

[0017] The beneficial effect of the present invention is that in the micromotor designed by the present invention, the micromotor can be provided with a Hall component on the rotating shaft at one end of the motor body by optimizing its own structure, so that when the rotating shaft of the motor body rotates around its own axis, it will also drive the Hall rotor to rotate in the Hall component. At this time, since a magnetic steel is provided in the Hall rotor and the magnetic steel can face the Hall element plate, the magnetic steel will affect the magnetic flux of the Hall element on the Hall element plate when it rotates. For example, when the magnetic steel rotates to a first state (such as a vertical state), the magnetic flux received by the Hall element on the Hall element plate is the largest, and a high level is obtained; on the contrary, when the magnetic steel rotates to a second state (such as a horizontal state), the magnetic flux received by the Hall element on the Hall element plate is the smallest, and a low level is obtained; thus, based on the high and low levels output by the above-mentioned Hall element, the rotation angle of the micromotor rotating shaft can be effectively obtained, and then the output shaft position can be obtained, so as to facilitate the subsequent control of the number of pulses to adjust the rotation angle of the micromotor rotating shaft.

[0018] It can be seen that, unlike the traditional technical solution of using visual scanning to detect and obtain the rotation angle of the micromotor shaft, the micromotor of the utility model can effectively adjust the rotation angle of the micromotor shaft while ensuring low cost. It is easy to use and has strong applicability, and it has good promotion prospects and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the micromotor described in the present utility model in one embodiment;

[0020] Figure 2 This is an exploded view of the structure of the micromotor according to one embodiment of the present invention;

[0021] Figure 3 This is a partial structural diagram of the micromotor described in the present utility model in one embodiment;

[0022] Figure 4 This is a schematic structural diagram of a Hall element of the micromotor according to one embodiment of the present invention;

[0023] Figure 5 This is an exploded view of the structure of the Hall element of the micromotor according to one embodiment of the present invention;

[0024] Figure 6 This is a schematic structural diagram of an end cover of the micromotor according to one embodiment of the present invention;

[0025] Figure 7 This is a schematic structural diagram of a mounting housing for the micromotor according to one embodiment of the present invention;

[0026] Figure 8This is a front view of the structure of the mounting housing of the micromotor according to one embodiment of the present invention;

[0027] Figure 9 This is a structural diagram of a micromotor according to the present invention having a Hall element plate and a Hall rotor installed in a mounting housing in one embodiment;

[0028] Figure 10 This is a structural schematic diagram of a micromotor according to the present invention having a Hall rotor installed in a mounting housing in one embodiment;

[0029] Figure 11 for Figure 10 a structural elevation view of the structure shown;

[0030] Figure 12 for Figure 10 a structural back view of the structure shown;

[0031] Figure 13 This is an exploded view of the structure of the Hall rotor of the micromotor according to one embodiment of the present invention;

[0032] Figure 14 This is a schematic structural diagram of a rotating sleeve of the micromotor according to the present invention from a perspective in one embodiment;

[0033] Figure 15 This is a structural schematic diagram of a rotating shaft sleeve of the micromotor described in the utility model under another perspective in one embodiment.

[0034] Description of labels:

[0035] 1. Motor body; 11. First rotating shaft; 12. Second rotating shaft; 13. First housing;

[0036] 2. Hall assembly; 21. Second shell; 211. Mounting shell; 212. End cover; 213. Limiting protrusion; 214. Accommodating chamber; 22. Hall rotor; 221. Rotating sleeve; 2211. First connecting part; 2212. Second connecting part; 222. Magnet; 223. Through-hole; 23. Hall element board; 231. Circuit board; 232. Hall element. DETAILED DESCRIPTION

[0037] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

[0038] In order to describe the technical solution of the present invention in detail, the inventors Figures 1-15 The structure of the micromotor of the illustrated embodiment will be explained.

[0039] like Figure 1 、 Figure 2 As shown, in the micromotor designed in the present invention, the micromotor specifically includes: a motor body 1 and a Hall assembly 2. The motor body 1 is a common micromotor body, which also includes a stator and a rotor required by a traditional micromotor, and the stator can be connected to a power supply line for power supply. Its specific structure is well known to those skilled in the art and will not be described in detail here.

[0040] Therefore, in this embodiment, Figure 3 As shown, the motor body 1 of the micromotor needs to include a first housing 13 and a first rotating shaft 11 and a second rotating shaft 12 extending from both ends of the first housing 13 and extending along a first direction, and the first rotating shaft 11 and the second rotating shaft 12 are controlled to rotate coaxially.

[0041] Accordingly, if Figure 4 and Figure 5 As shown, in the micromotor designed in the present invention, the Hall assembly 2 specifically includes a second housing 21, a Hall element plate 23, and a Hall rotor 22 disposed in the second housing 21. The Hall element plate 23 is fixedly disposed in the second housing 21, while the Hall rotor 22 is rotatably disposed in the second housing 21, and the Hall rotor 22 needs to be disposed directly opposite the Hall element plate 23. The Hall rotor 22 includes a rotating sleeve 221 and a magnet 222. The rotating sleeve 221 defines a through cavity 223 extending in a first direction. The magnet 222 is specifically disposed in an opening at one end of the through cavity 223 near the Hall element plate 23, and the other end of the through cavity 223, away from the Hall element plate 23, is sleeved on the first rotating shaft 11.

[0042] A major feature of the present invention is that the rotation of the first rotating shaft 11 on the above-mentioned motor body 1 drives the rotation of the Hall rotor 22 in the second housing 21, so that the magnet 222 in the Hall rotor 22 can rotate together. The rotation of the magnet 222 affects the magnetic flux that can be received by the Hall element plate 23, and thus the change in magnetic flux is converted into a level change, and the rotation angle of the first rotating shaft 11 is determined. Since the first rotating shaft 11 and the second rotating shaft 12 rotate coaxially, the rotation angle and the output shaft position of the second rotating shaft 12 can be further determined.

[0043] In addition, it is important to point out that in order to obtain a better implementation effect and ensure the consistency of relative matching, in the actual setting, the openings at both ends of the through cavity 223 of the above-mentioned rotating sleeve 221 are both "D"-shaped, and the outer contour of the magnet 222 provided at one end opening of the through cavity 223 is also "D"-shaped, and the cross-sectional outer contour of the first rotating shaft 11 that matches the opening at the other end of the above-mentioned through cavity 223 is also "D"-shaped, so as to ensure the stability and reliability of the structure and not bring uncontrollable factors to the detection of the rotation angle.

[0044] See Figure 5 , combined with reference Figure 6 、 Figure 7 、 Figure 8 and Figure 9 It can be seen that in this embodiment, the second housing 21 of the Hall element 2 specifically includes a square mounting shell 211 and a rectangular end cover 212 provided on one side of the mounting shell 211, so that the Hall element plate 23 is fixed to the end cover 212 provided on the mounting shell 211 by screws. Figure 7 As shown, in this embodiment, a accommodating chamber 214 is provided in the square mounting shell 211. The accommodating chamber 214 is used to accommodate the Hall rotor 22 and the Hall element plate 23. The accommodating chamber 214 is respectively provided with openings at the left and right ends along the first direction, so that the left end of the accommodating chamber 214 is connected to the end cover 212, and the Hall rotor 22 can be connected to the first rotating shaft 11 from the right end of the accommodating chamber 214. At the same time, in order to ensure the firm installation of the end cover 212 and the mounting shell 211, a limiting protrusion 213 that matches the shape of the opening on one side of the mounting shell 211 is further provided on the side of the end cover 212 close to the mounting shell 211 to perform blocking and limiting.

[0045] At the same time, in this embodiment, the above-mentioned Hall element board 23 includes a circuit board 231 and multiple Hall elements 232. The multiple Hall elements 232 are arranged in an array on the circuit board 231 along a second direction. The second direction is the extension direction of the straight line segment of the "D"-shaped outer contour of the magnet 222, so as to utilize the above-mentioned multiple Hall elements 232 to output high and low levels generated by the rotation of the magnet 222 and Hall induction. The above-mentioned circuit board 231 is used to receive the electrical signal output by the Hall element 232, so as to analyze and obtain the current rotation angle of the first rotating shaft 11 and the second rotating shaft 12, so as to facilitate the subsequent control of the rotation angle of the first rotating shaft 11 and the second rotating shaft 12 through pulses.

[0046] Accordingly, if Figure 10 and Figure 11 As shown, in this embodiment, the magnet 222 arranged in the rotating sleeve 221 includes a first permanent magnet and a second permanent magnet, and the first permanent magnet and the second permanent magnet are symmetrically arranged along a symmetry axis perpendicular to the above-mentioned second direction, and the outer surface of the first permanent magnet close to the Hall element plate 23 is an N pole, and the outer surface of the second permanent magnet close to the Hall element plate 23 is an S pole.

[0047] Meanwhile, in this embodiment, refer to Figure 12-15It can be seen that the micromotor of the present invention optimizes the design of the structure of the rotating sleeve 221. The rotating sleeve 221 includes a first connecting portion 2211 and a second connecting portion 2212 extending along a first direction. The first connecting portion 2211 and the second connecting portion 2212 are connected to each other, and the outer contours of the first connecting portion 2211 and the second connecting portion 2212 are both circular.

[0048] In the present invention, the magnetic steel 222 is provided in the first connecting portion 2211, and the second connecting portion 2212 is sleeved on the first rotating shaft 11. The circular outer diameter of the first connecting portion 2211 is larger than the circular outer diameter of the second connecting portion 2212. The cross-sectional area of the through cavity 223 in the first connecting portion 2211 is larger than the cross-sectional area of the through cavity 223 in the second connecting portion 2212. In addition, in order to ensure that the first rotating shaft 11 can be firmly and reliably provided in the second connecting portion 2212, The through cavity 223 in the second connecting part 2212 is also optimized and improved, so that the through cavity 223 in the second connecting part 2212 is set to include a first cavity and a second cavity that are connected to each other, and the two ends of the above-mentioned first cavity are respectively connected to the through cavity 223 and the second cavity of the first connecting part 2211. The above-mentioned second cavity is sleeved on the first rotating shaft 11, and the cross-sectional area of the first cavity is smaller than the cross-sectional area of the second cavity, so that the first rotating shaft 11 inserted into the second cavity will be blocked by the first cavity without affecting the magnet 222.

[0049] It can be seen that in the actual application of the micromotor of the present invention, when the motor body 1 is powered to rotate the first rotating shaft 11 and the second rotating shaft 12 around their own axes, the rotation of the first rotating shaft 11 will also drive the Hall rotor 22 to rotate in the second shell 21 of the Hall component 2, that is, drive the rotating sleeve 221 to rotate. At this time, since the rotating sleeve 221 is also provided with a magnetic steel 222, and the magnetic steel 222 can face the Hall element plate 23, the magnetic steel 222 will affect the magnetic flux of the Hall element 232 on the Hall element plate 23 when it rotates. For example, when the magnetic steel 222 rotates to the first state (such as the vertical state), its Hall element plate 23 receives the maximum magnetic flux, and obtains a high level; on the contrary, when the magnet 222 rotates to the second state (such as the horizontal state), the magnetic flux received by the Hall element 232 on the Hall element plate 23 is the minimum, and obtains a low level; thus, the above-mentioned Hall element 232 outputs the above-mentioned electrical signal to the circuit board 231, and the circuit board 231 can obtain the rotation angle of the first rotating shaft 11 of the micromotor based on the high and low levels output by the above-mentioned Hall element 232, and then obtain the output shaft position of the second rotating shaft 12, so as to facilitate the subsequent control of the number of pulses to adjust the rotation angle and output shaft position of the second rotating shaft 12 of the micromotor.

[0050] In summary, the micromotor provided by the present invention can effectively detect and obtain the rotation angle of the first rotating shaft 11 of the motor, thereby obtaining the output shaft position of the second rotating shaft 12 by optimizing its own structure; unlike the traditional technical solution of using visual scanning to detect and obtain the rotation angle of the micromotor shaft, the micromotor of the present invention ensures low cost while using the high and low levels generated by Hall induction to judge and adjust the rotation angle of the micromotor shaft. It has low cost, is easy to use and has strong applicability, and has good promotion prospects and application value.

[0051] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A micromotor, characterized in that: include: A motor body and a Hall assembly, wherein the motor body includes a first housing and a first rotating shaft and a second rotating shaft extending from both ends of the first housing and extending in a first direction, wherein the first rotating shaft and the second rotating shaft rotate coaxially; The Hall assembly includes a second shell and a Hall element plate and a Hall rotor arranged in the second shell. The Hall rotor is rotatably arranged in the second shell and is arranged opposite to the Hall element plate. The Hall rotor includes a rotating sleeve and a magnet. A through cavity extending along a first direction is defined in the rotating sleeve. The magnet is arranged in an opening at one end of the through cavity close to the Hall element plate, and the other end of the through cavity away from the Hall element plate is sleeved on the first rotating shaft.

2. The micromotor according to claim 1, characterized in that: Both end openings of the through cavity are in a "D" shape, the outer contour of the magnetic steel is in a "D" shape, and the outer contour of the cross section of the first rotating shaft is in a "D" shape.

3. The micromotor according to claim 2, characterized in that: The Hall element plate includes a circuit board and a plurality of Hall elements, wherein the plurality of Hall elements are arranged in an array on the circuit board along a second direction, and the second direction is the extension direction of the straight line segment of the "D"-shaped outer contour of the magnetic steel.

4. The micromotor according to claim 3, characterized in that: The magnetic steel includes a first permanent magnet and a second permanent magnet, and the first permanent magnet and the second permanent magnet are symmetrically arranged along a symmetry axis perpendicular to the second direction. The outer surface of the first permanent magnet close to the Hall element plate is an N pole, and the outer surface of the second permanent magnet close to the Hall element plate is an S pole.

5. The micromotor according to claim 1, characterized in that: The rotating sleeve includes a first connecting portion and a second connecting portion extending along a first direction. The first connecting portion and the second connecting portion are connected to each other, and outer contours of the first connecting portion and the second connecting portion are both circular.

6. The micromotor according to claim 5, characterized in that: The diameter of the circular outer contour of the first connecting portion is greater than the diameter of the circular outer contour of the second connecting portion.

7. The micromotor according to claim 6, characterized in that: A cross-sectional area of the through cavity in the first connecting portion is greater than a cross-sectional area of the through cavity in the second connecting portion.

8. The micromotor according to claim 7, characterized in that: The magnetic steel is arranged in the first connecting portion, and the second connecting portion is sleeved on the first rotating shaft.

9. The micromotor according to claim 8, characterized in that: The through cavity in the second connecting portion includes a first cavity and a second cavity that are connected to each other. The second cavity is sleeved on the first rotating shaft, and the cross-sectional area of the first cavity is smaller than the cross-sectional area of the second cavity.

10. The micromotor according to claim 1, characterized in that: The second housing includes a mounting shell and an end cover provided on one side of the mounting shell. The Hall element plate is fixed to the end cover provided on the mounting shell by screws.

Images