Anti-loosening micro-motor rotor
By designing an automatically locked fastener structure and thermally conductive breathable pore system in the micromotor rotor, the problem of loosening and overheating of the micromotor rotor when vibrating is solved, and the effect of stable operation and heat discharge is achieved.
Patent Information
- Application Number
- CN202420634944.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The fasteners are easy to rotate when the existing micromotor rotor vibrates, causing the enameled wire to loosen and the internal heat of the enameled wire to be unable to be discharged quickly, resulting in overheating and damage to the micromotor rotor.
A structure including external threaded cylinder, gland, fastener, through holes, hollow blocks, springs and trapezoidal clamps is designed. The fastener is automatically locked through the spring's elastic force to prevent loosening, and pass through thermal columns and breathable The tank quickly discharges heat.
It effectively prevents the fastener from rotating when the micromotor rotor vibrates, keeps the enameled wire from loosening, and quickly discharges heat through thermal conductivity and breathable holes to prevent overheating damage.
Smart Images
Figure CN222191952U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of micro motor rotors, in particular to an anti-loosening micro motor rotor. Background Art
[0002] Micromotors are motors with a diameter less than 160mm or a rated power less than 750mW. Micromotors are often used in control systems or transmission mechanical loads to detect, analyze, amplify, execute or convert electromechanical signals or energy.
[0003] At present, in order to prevent the enameled wire on the micromotor rotor from loosening, most of the glands are fixed to the two ends of the rotor core by fasteners, and the enameled wire is pressed by the gland to prevent the enameled wire from loosening. For example, a DC brushed micromotor disclosed in Chinese Patent Publication No. CN209709913U, however, is fixed to the rotor shaft by threads, and the fastener often rotates due to the vibration of the micromotor rotor, causing the gland and the enameled wire to loosen. At the same time, since the heat in the enameled wire cannot be quickly discharged, the micromotor rotor is often damaged due to overheating of the enameled wire. Utility Model Content
[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, such as: at present, in order to prevent the enameled wire on the micromotor rotor from loosening, most of the glands are fixed to the two ends of the rotor core by fasteners, and the enameled wire is pressed by the gland, so that the enameled wire is not easy to loosen, but because the fastener and the rotor shaft are fixed by threads, the fastener often rotates due to the vibration of the micromotor rotor, and the gland and the enameled wire are loosened. At the same time, since the heat in the enameled wire cannot be quickly discharged, the micromotor rotor is often damaged due to overheating inside the enameled wire, and an anti-loosening micromotor rotor is proposed.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A micromotor rotor that prevents loosening comprises a rotor shaft, an iron core is fixedly connected to the surface of the rotor shaft, a winding groove is provided on the surface of the iron core, enameled wires are fitted on the inner wall of the winding groove and the left and right sides of the iron core, an external threaded barrel is fixedly connected to the surface of the rotor shaft and the left and right sides of the iron core, a pressure cap is fitted on the surface of the external threaded barrel and the left and right sides of the enameled wire, a fastener is fitted on the side of the pressure cap and the surface of the rotor shaft, the inner wall of the fastener is threadedly connected to the surface of the external threaded barrel, a through hole is provided inside the rotor shaft, a hollow block is fixedly connected to the inner wall of the through hole, a spring is fixedly connected to the inner wall of the hollow block, trapezoidal blocks are fixedly connected to the upper and lower ends of the spring, the side of the fastener and the inner wall of the through hole are in contact with the surface of the trapezoidal block, and an air vent is provided inside the trapezoidal block.
[0007] Preferably, the fastener includes an internally threaded barrel, the inner wall of the internally threaded barrel is threadedly connected to the surface of the externally threaded barrel, the surface of the internally threaded barrel is provided with a sliding groove, the inner wall of the sliding groove is fitted with a sliding column, a strip hole is provided inside the sliding column, the inner wall of the sliding groove is fixedly connected to a limiting column, the surface of the limiting column contacts the inner wall of the strip hole, the side surface of the internally threaded barrel contacts the side surface of the trapezoidal block, the side surface of the sliding column is fixedly connected to a hollow rotating block, and the inner wall of the hollow rotating block contacts the surface of the rotor shaft.
[0008] Preferably, the hollow rotating block is a regular hexagonal block, and the center of the hollow rotating block and the center of the rotor shaft are on the same horizontal line.
[0009] Preferably, a retaining ring is fixedly connected to the surface of the hollow rotating block.
[0010] Preferably, a first heat-conducting hole is opened inside the iron core, a second heat-conducting hole is opened inside the iron core, the first heat-conducting hole and the winding groove are both communicated with the second heat-conducting hole, a first heat-conducting column is fixedly connected to the inner wall of the first heat-conducting hole, a second heat-conducting column is fixedly connected to the surface of the first heat-conducting column and the inner wall of the second heat-conducting hole, and a third heat-conducting column is fixedly connected to the side of the first heat-conducting column away from the rotor shaft and the surface of the iron core.
[0011] Preferably, a ventilation groove is provided on the surface of the third heat-conducting column.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] (1) The utility model is provided with an external threaded barrel, a gland, a fastener, a through hole, a hollow block, a spring and a trapezoidal block, wherein when the internal threaded barrel on the fastener is staggered with the trapezoidal block, the elastic force of the spring can make the side surface of the trapezoidal block contact with the side surface of the internal threaded barrel, and the trapezoidal block can prevent the internal threaded barrel from rotating on the external threaded barrel, so that the fastener can be automatically locked after rotating to a specified position, so that the fastener is not easy to rotate after the micromotor rotor is vibrated, and the gland and the enameled wire are not easy to loosen.
[0014] (2) The utility model can transfer the heat inside the enameled wire to the third heat-conducting column through the cooperation of the first heat-conducting column and the second heat-conducting column, so that the heat inside the enameled wire can be quickly discharged, thereby preventing the micromotor rotor from being damaged due to overheating inside the enameled wire. At the same time, when the micromotor rotor rotates, air will flow through the air permeable groove, and the heat in the third heat-conducting column can be taken away by the air flow, so that the heat of the third heat-conducting column can be quickly discharged through the air permeable groove. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structure of the utility model;
[0016] Figure 2 for Figure 1 Middle A: Enlarged view;
[0017] Figure 3 for Figure 1 Sectional view at the middle BB;
[0018] Figure 4 for Figure 3 Enlarged view of point C in the middle;
[0019] Figure 5 It is a top view of the rotor shaft in the utility model;
[0020] Figure 6 It is a side view of the fastener in the utility model;
[0021] Figure 7 for Figure 6 Sectional view at DD in the middle;
[0022] Figure 8 It is a side view of the internal threaded barrel in the utility model.
[0023] In the figure: 1. rotor shaft; 2. iron core; 3. winding groove; 4. enameled wire; 5. external threaded cylinder; 6. gland; 7. fastener; 71. internal threaded cylinder; 72. slide groove; 73. slide column; 74. bar hole; 75. limit column; 76. hollow rotating block; 8. through hole; 9. hollow block; 10. spring; 11. trapezoidal block; 12. air hole; 13. retaining ring; 14. first heat conducting hole; 15. second heat conducting hole; 16. first heat conducting column; 17. second heat conducting column; 18. third heat conducting column; 19. air groove. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0026] Embodiment 1:
[0027] Reference Figure 1-8 A micro-motor rotor for preventing loosening includes a rotor shaft 1, an iron core 2 is fixedly connected to the surface of the rotor shaft 1, a winding groove 3 is opened on the surface of the iron core 2, an enameled wire 4 is fitted on the inner wall of the winding groove 3 and the left and right sides of the iron core 2, and the enameled wire 4 is supported by the iron core 2, an external threaded barrel 5 is fixedly connected to the surface of the rotor shaft 1 and the left and right sides of the iron core 2, a gland 6 is fitted on the surface of the external threaded barrel 5 and the left and right sides of the enameled wire 4, a fastener 7 is fitted on the side of the gland 6 and the surface of the rotor shaft 1, the inner wall of the fastener 7 is threadedly connected to the surface of the external threaded barrel 5, and when the fastener 7 is screwed on the external threaded barrel 5, the enameled wire 4 is supported by the iron core 2. Through the cooperation of the fastener 7 and the external threaded barrel 5, the pressure cap 6 can be fixed on the external threaded barrel 5, and the enameled wire 4 can be pressed by the pressure cap 6, so that the enameled wire 4 will not loosen. A through hole 8 is opened inside the rotor shaft 1, and a hollow block 9 is fixedly connected to the inner wall of the through hole 8. A spring 10 is fixedly connected to the inner wall of the hollow block 9. The upper and lower ends of the spring 10 are fixedly connected with a trapezoidal block 11. The side surface of the fastener 7 and the inner wall of the through hole 8 are in contact with the surface of the trapezoidal block 11. An air vent 12 is opened inside the trapezoidal block 11. When the trapezoidal block 11 moves in the through hole 8, the air inside and outside the through hole 8 can circulate through the air vent 12.
[0028] The fastener 7 comprises an internal threaded tube 71, the inner wall of the internal threaded tube 71 is threadedly connected to the surface of the external threaded tube 5. When the internal threaded tube 71 is screwed on the external threaded tube 5, the internal threaded tube 71 can be fixed to the external threaded tube 5 by means of threads. A sliding groove 72 is provided on the surface of the internal threaded tube 71, and a sliding post 73 is provided in affixed to the inner wall of the sliding groove 72. The sliding post 73 can move horizontally in the sliding groove 72. A strip hole 74 is provided inside the sliding post 73. A limiting post 75 is fixedly connected to the inner wall of the sliding groove 72. The surface of the limiting post 75 contacts the inner wall of the strip hole 74. Through the cooperation of the limiting post 75 and the strip hole 74, the sliding post 73 and the sliding groove 72 cannot be separated. The side of the internal threaded tube 71 contacts the side of the trapezoidal block 11. The side of the sliding post 73 A hollow rotating block 76 is fixedly connected to the surface, and the inner wall of the hollow rotating block 76 contacts the surface of the rotor shaft 1. The hollow rotating block 76 is a regular hexagonal block. The center of the hollow rotating block 76 is on the same horizontal line as the center of the rotor shaft 1. A retaining ring 13 is fixedly connected to the surface of the hollow rotating block 76. The retaining ring 13 prevents the user from slipping when clamping and pushing the hollow rotating block 76 with a tool. At the same time, when the user pushes the hollow rotating block 76 to reduce the distance between the hollow rotating block 76 and the internal threaded tube 71, the hollow rotating block 76 will apply a thrust to the inclined surface of the trapezoidal clamping block 11, and separate the trapezoidal clamping block 11 from the internal threaded tube 71 through the thrust, and, through the cooperation of the sliding column 73 and the sliding groove 72, the hollow rotating block 76 and the internal threaded tube 71 can rotate synchronously.
[0029] Embodiment 2:
[0030] Reference Figure 1-4 A first heat-conducting hole 14 is provided inside the iron core 2, a second heat-conducting hole 15 is provided inside the iron core 2, the first heat-conducting hole 14 and the winding groove 3 are both connected to the second heat-conducting hole 15, a first heat-conducting column 16 is fixedly connected to the inner wall of the first heat-conducting hole 14, a second heat-conducting column 17 is fixedly connected to the surface of the first heat-conducting column 16 and the inner wall of the second heat-conducting hole 15, a third heat-conducting column 18 is fixedly connected to the side of the first heat-conducting column 16 away from the rotor shaft 1 and the surface of the iron core 2, The cooperation of the two heat-conducting columns 17 can conduct the heat inside the enameled wire 4 to the third heat-conducting column 18, so that the heat inside the enameled wire 4 can be quickly discharged, thereby preventing the micromotor rotor from being damaged due to overheating inside the enameled wire 4. The surface of the third heat-conducting column 18 is provided with a ventilation groove 19. When the micromotor rotor rotates, air will flow through the ventilation groove 19, and the heat in the third heat-conducting column 18 can be taken away by the air flow, and the heat of the third heat-conducting column 18 can be quickly discharged through the ventilation groove 19.
[0031] In the utility model, when the user assembles the micromotor rotor, the enameled wire 4 is first wound around the iron core 2 and the winding groove 3, and then, by rotating the internal threaded barrel 71, the gland 6 presses the enameled wire 4 under the cooperation of the internal threaded barrel 71 and the external threaded barrel 5, and the enameled wire 4 is prevented from loosening by the gland 6. At the same time, when the trapezoidal clamping block 11 is staggered with the internal threaded barrel 71, the side of the trapezoidal clamping block 11 is contacted with the side of the internal threaded barrel 71 by the spring 10, and the internal threaded barrel 71 cannot be rotated on the external threaded barrel 5 by the trapezoidal clamping block 11. At this time, the internal threaded barrel can be 71 is locked, and when the micromotor rotor vibrates, the gland 6 and the enameled wire 4 will not loosen. When the enameled wire 4 needs to be removed, first use a tool to clamp the hollow rotating block 76, and move the hollow rotating block 76 to apply a thrust to the inclined surface of the trapezoidal block 11. At this time, the trapezoidal block 11 is separated from the internal threaded tube 71 by the thrust, and then, by rotating the hollow rotating block 76, the internal threaded tube 71 releases the gland 6, and the gland 6 releases the enameled wire 4. When the gland 6 releases the enameled wire 4, the enameled wire 4 can be removed from the core 2.
[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
Claims
1. A micromotor rotor that is prevented from loosening, comprising a rotor shaft (1), characterized in that: The surface of the rotor shaft (1) is fixedly connected to an iron core (2), the surface of the iron core (2) is provided with a winding groove (3), the inner wall of the winding groove (3) and the left and right sides of the iron core (2) are both fitted with enameled wires (4), the surface of the rotor shaft (1) and the left and right sides of the iron core (2) are both fixedly connected to an external threaded tube (5), the surface of the external threaded tube (5) and the left and right sides of the enameled wire (4) are both fitted with a gland (6), and the side surface of the gland (6) and the surface of the rotor shaft (1) are both fitted with a fastener (7) The inner wall of the fastener (7) is threadedly connected to the surface of the external threaded tube (5); a through hole (8) is provided inside the rotor shaft (1); a hollow block (9) is fixedly connected to the inner wall of the through hole (8); a spring (10) is fixedly connected to the inner wall of the hollow block (9); the upper and lower ends of the spring (10) are fixedly connected to trapezoidal blocks (11); the side surface of the fastener (7) and the inner wall of the through hole (8) are in contact with the surface of the trapezoidal block (11); and a vent hole (12) is provided inside the trapezoidal block (11).
2. The anti-loosening micromotor rotor according to claim 1, characterized in that: The fastener (7) comprises an internal threaded tube (71), the inner wall of the internal threaded tube (71) is threadedly connected to the surface of the external threaded tube (5), the surface of the internal threaded tube (71) is provided with a slide groove (72), the inner wall of the slide groove (72) is fitted with a slide column (73), a strip hole (74) is provided inside the slide column (73), the inner wall of the slide groove (72) is fixedly connected to a limiting column (75), the surface of the limiting column (75) contacts the inner wall of the strip hole (74), the side surface of the internal threaded tube (71) contacts the side surface of the trapezoidal block (11), the side surface of the slide column (73) is fixedly connected to a hollow rotating block (76), and the inner wall of the hollow rotating block (76) contacts the surface of the rotor shaft (1).
3. The anti-loosening micromotor rotor according to claim 2, characterized in that: The hollow rotating block (76) is a regular hexagonal block, and the center of the hollow rotating block (76) is on the same horizontal line as the center of the rotor shaft (1).
4. The anti-loosening micromotor rotor according to claim 2, characterized in that: A retaining ring (13) is fixedly connected to the surface of the hollow rotating block (76).
5. The anti-loosening micromotor rotor according to claim 1, characterized in that: A first heat conducting hole (14) is provided inside the iron core (2), a second heat conducting hole (15) is provided inside the iron core (2), the first heat conducting hole (14) and the winding slot (3) are both in communication with the second heat conducting hole (15), a first heat conducting column (16) is fixedly connected to the inner wall of the first heat conducting hole (14), a second heat conducting column (17) is fixedly connected to the surface of the first heat conducting column (16) and the inner wall of the second heat conducting hole (15), and a third heat conducting column (18) is fixedly connected to the side of the first heat conducting column (16) away from the rotor shaft (1) and the surface of the iron core (2).
6. The anti-loosening micromotor rotor according to claim 5, characterized in that: A ventilation groove (19) is provided on the surface of the third heat-conducting column (18).