Directional rotor of synchronous motor and synchronous motor

Abstract

The utility model belongs to the technical field of motors, and particularly relates to a directional rotor of a synchronous motor and the synchronous motor, the directional rotor comprises a body and a first gear arranged on the upper side of the body, an annular convex edge arranged around the first gear is arranged on the upper end face of the body, and a gap is formed between the annular convex edge and the first gear; an annular protruding edge is arranged on the periphery of the first gear, the two opposite sides of the annular protruding edge extend outwards to form positioning protruding parts, and compared with the prior art, the annular protruding edge separated from the first gear is arranged on the periphery of the first gear, and the positioning protruding parts used for limiting reverse rotation of the rotor are formed on the two opposite sides of the annular protruding edge. Therefore, the mutual influence between the first gear and the positioning convex part due to shrinkage after injection molding is avoided, the structural stability and quality between the positioning convex part and the first gear and the control precision of a rotor inner hole are improved, the noise of the motor is reduced, and the service life of the motor is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically a directional rotor for a synchronous motor and a synchronous motor. Background Technology

[0002] Existing permanent magnet synchronous motors mainly include a housing, a coil support inside the housing, a rotor located in the mounting hole in the middle of the coil support, a mounting plate covering the upper side of the coil support, and a transmission assembly on the mounting plate. The rotor has a first gear, and the transmission assembly has a second gear that meshes with the first gear. Since the synchronous motor is connected to alternating current, to prevent the rotor from reversing due to changes in the magnetic field caused by changes in current when the power is switched on and off, a blocking structure is usually set on the lower side of the second gear, and a protruding structure that cooperates with the blocking structure is set on the lower side of the first gear to limit the rotation direction of the rotor. The existing protruding structure is generally integrated with the first gear, mainly formed by injection molding. However, since plastic shrinks after injection molding, the shrinkage of the existing protruding structure integrated with the first gear affects each other, which can easily lead to structural instability and poor strength. This affects the injection molding accuracy of the inner hole of the motor rotor, thereby affecting the noise and life of the motor. Therefore, it is necessary to develop a rotor that can improve the strength of the first gear and the protruding structure. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a directional rotor that can improve the strength of the first gear and the protrusion structure.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A directional rotor for a synchronous motor includes a body and a first gear disposed on the upper side of the body. The upper end face of the body is provided with an annular protrusion surrounding the first gear. A gap is provided between the annular protrusion and the first gear. The opposite sides of the annular protrusion extend outward to form positioning protrusions.

[0006] Furthermore, the annular convex edge includes a first arc segment connecting the two ends of the positioning protrusion. The two ends of the first arc segment form an inwardly extending locking position with the corresponding positioning protrusion. The locking position can effectively abut against the blocking structure of the synchronous motor transmission mechanism, effectively locking the rotor to prevent it from rotating in the opposite direction.

[0007] Furthermore, the positioning protrusion includes a straight section at both ends that is connected to the corresponding first arc segment, and a second arc segment that connects the straight sections at both ends, with the straight section and the first arc segment forming the locking position.

[0008] Furthermore, the inclined straight sections at both ends and their corresponding second arc sections enclose a hollow area, which can increase the distance between the hollow area and the first gear, thereby simplifying the design difficulty of the injection mold and saving materials.

[0009] Furthermore, the positioning protrusion is configured as a fan-shaped structure with an outwardly expanding cross-section. The fan-shaped structure formed by the above configuration can increase the contact area with the blocking structure of the synchronous motor transmission mechanism.

[0010] Furthermore, several reinforcing ribs are connected between the annular convex edge and the first gear, thereby further improving the strength of the first gear and the annular convex edge and preventing deformation.

[0011] This utility model also provides a synchronous motor, which includes a housing, a coil support, a mounting plate, a transmission assembly, and the aforementioned directional rotor. The coil support is provided with an assembly groove for mounting the directional rotor. The mounting plate is located on the upper side of the coil support and has a first through hole in the middle for the first gear to pass through. The transmission assembly is mounted on the mounting plate and is provided with a second gear that meshes with the first gear.

[0012] The bottom of the second gear is provided with a second directional ratchet that can rotate around its rotation axis. The directional ratchet is configured with a blocking part that extends into the first through hole and is located on the lower side of the first gear. The first through hole is provided with outwardly extending clearance grooves on opposite sides of the line connecting the rotation axis of the first gear and the rotation axis of the second gear. The blocking part can enter the clearance groove on the corresponding side to avoid the positioning protrusion when the second gear rotates in the first direction, and can leave the clearance groove and abut against the positioning protrusion when the second gear rotates in the second direction, so as to restrict the rotation direction of the rotor.

[0013] Compared with the prior art, the directional rotor provided by this utility model has an annular protrusion separate from the first gear on its periphery, and positioning protrusions for limiting rotor reversal are formed on the opposite sides of the annular protrusion. This avoids the mutual influence between the first gear and the positioning protrusions due to shrinkage after injection molding, thereby improving the structural stability, quality and control accuracy of the rotor inner hole between the positioning protrusions and the first gear, reducing motor noise and increasing motor life. Attached Figure Description

[0014] Figure 1 A three-dimensional view of a directional rotor;

[0015] Figure 2 This is a schematic diagram of the reinforcing ribs;

[0016] Figure 3 and Figure 4 This is a schematic diagram of the structure of a synchronous motor;

[0017] Figure 5 and Figure 6 This is a schematic diagram of the structure when the blocking part and the positioning protrusion are engaged. Detailed Implementation

[0018] The following describes a preferred embodiment of the present invention in conjunction with the accompanying drawings.

[0019] See Figure 1 and Figure 6 This embodiment provides a directional rotor for a synchronous motor and a synchronous motor using the directional rotor, such as... Figure 1 As shown, the aforementioned directional rotor 3 includes a body 30 and a first gear 31 disposed on the upper side of the body 30. The upper end surface of the body 30 is provided with an annular protrusion 312 surrounding the first gear 31. A gap is provided between the annular protrusion 312 and the first gear 31. The opposite sides of the annular protrusion 312 extend outward to form positioning protrusions 311.

[0020] See Figure 1 The annular convex edge 312 includes a first arc segment 313 connecting the two ends of the positioning protrusions 311. The two ends of the first arc segment 313 form an inwardly extending locking position 314 with the corresponding positioning protrusions 311. The locking position 314 can effectively abut against the blocking structure of the synchronous motor transmission mechanism, effectively locking the rotor to prevent it from rotating in the opposite direction. Specifically, in one embodiment, the positioning protrusion 311 includes a straight oblique segment 315 located at both ends connected to the corresponding first arc segment 313, and a second arc segment 316 connecting the two ends of the straight oblique segment 315. The locking position 314 is formed between the straight oblique segment 315 and the first arc segment 313.

[0021] See Figure 1 The inclined straight section 315 at both ends and its corresponding second arc section 316 enclose a hollow area 317. This hollow area 317 can increase the distance between the first gear 31, thereby simplifying the design difficulty of the injection mold and saving materials.

[0022] See Figure 1 The positioning protrusion 311 is configured as a fan-shaped structure with an outwardly expanding cross-section. The fan-shaped structure formed by the above configuration can increase the contact area with the blocking structure of the synchronous motor transmission mechanism.

[0023] See Figure 2 A plurality of reinforcing ribs 318 are connected between the annular protrusion 312 and the first gear 31, thereby further improving the strength of the first gear 31 and the annular protrusion 312 and preventing their deformation.

[0024] See Figure 3 and Figure 4 The aforementioned synchronous motor includes a housing 1, a coil support 2, a mounting plate 5, a transmission assembly, and the aforementioned directional rotor 3. The coil support 2 is provided with an assembly slot 21 for mounting the directional rotor. The mounting plate 5 is located on the upper side of the coil support 2 and has a first through hole 51 in the middle for the first gear 31 to pass through. The transmission assembly is mounted on the mounting plate 5 and is provided with a second gear 62 that meshes with the first gear 31.

[0025] See Figures 3 to 5 The bottom of the second gear 62 is provided with a second directional ratchet 4 that can rotate around its rotation axis. The directional ratchet 4 is provided with a blocking part 41 that extends into the first through hole 51 and is located on the lower side of the first gear 31. The first through hole 51 is provided with outwardly extending clearance grooves 511 on opposite sides of the line 100 connecting the rotation axis of the first gear 31 and the rotation axis of the second gear 62. The blocking part 41 can enter the clearance groove 511 on the corresponding side to avoid the positioning protrusion 311 when the second gear 62 rotates in the first direction, and can leave the clearance groove 511 and abut against the positioning protrusion 311 when the second gear 62 rotates in the second direction, so as to restrict the rotation direction of the rotor 3.

[0026] In the event of a power outage, to prevent rotor 3 from reversing due to changes in magnetic field caused by changes in current during power switching, such as... Figure 5 As shown, a directional ratchet 4 is provided at the bottom of the second gear 62. This directional ratchet 4 has a blocking part 41 that extends into the first through hole 51. In actual use, the blocking part 41 can be positioned on the left or right side of the connecting line 100 according to the direction of the forward rotation of the rotor 3. For example, when the forward rotation direction of the rotor 3 is clockwise, the corresponding rotation direction of the second gear 62 is counterclockwise. The first direction is counterclockwise, and the second direction is clockwise. In this case, in order to ensure that the rotor 3 can work normally, the blocking part 41 is positioned on the right side of the connecting line 100. This ensures that when the blocking part 41 rotates counterclockwise with the second gear 62, it can enter the clearance groove 511 located on the right side to avoid the positioning protrusion 311. Figure 6 As shown, when the rotor 3 rotates in the opposite direction (counterclockwise), that is, when the second gear 62 rotates in the second direction (clockwise), the blocking part 41 moves away from the clearance groove 511 and abuts against the positioning protrusion 311 as the second gear 62 rotates clockwise, thereby preventing the rotor 3 from continuing to rotate in the opposite direction.

[0027] Compared with the prior art, the directional rotor of this utility model has an annular protrusion 312 separated from the first gear 31 on its periphery, and positioning protrusions 311 for limiting rotor reversal are formed on the opposite sides of the annular protrusion 312. This avoids mutual influence between the first gear 31 and the positioning protrusions 311 due to shrinkage after injection molding, thereby improving the structural stability and quality between the positioning protrusions 311 and the first gear 31 and the control accuracy of the inner hole of the rotor 3, reducing motor noise and increasing motor life.

[0028] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A directional rotor for a synchronous motor, characterized in that, The device includes a body (30) and a first gear (31) disposed on the upper side of the body (30). The upper end face of the body (30) is provided with an annular protrusion (312) surrounding the first gear (31). There is a gap between the annular protrusion (312) and the first gear (31). The opposite sides of the annular protrusion (312) extend outward to form positioning protrusions (311).

2. The directional rotor according to claim 1, characterized in that, The annular convex edge (312) includes a first arc segment (313) connecting the two ends of the positioning protrusions (311), and the two ends of the first arc segment (313) form an inwardly extending locking position (314) with the corresponding positioning protrusions (311).

3. The directional rotor according to claim 2, characterized in that, The positioning protrusion (311) includes a straight section (315) located at both ends and connected to the corresponding first arc segment (313), and a second arc segment (316) connecting the two ends of the straight section (315). The locking position (314) is formed between the straight section (315) and the first arc segment (313).

4. The directional rotor according to claim 3, characterized in that, The straight sections (315) at both ends and their corresponding second arc sections (316) enclose a hollow area (317).

5. The directional rotor according to claim 1, characterized in that, The positioning protrusion (311) is configured as a fan-shaped structure with an outwardly expanding cross-section.

6. The directional rotor according to claim 1, characterized in that, A plurality of reinforcing ribs (318) are connected between the annular protrusion (312) and the first gear (31).

7. A synchronous motor, characterized in that, The assembly comprises a housing (1), a coil support (2), a mounting plate (5), a transmission assembly, and a directional rotor (3) as described in any one of claims 1 to 6. The coil support (2) is provided with an assembly slot (21) for mounting the directional rotor (3). The mounting plate (5) is located on the upper side of the coil support (2) and has a first through hole (51) in the middle for the first gear (31) to pass through. The transmission assembly is mounted on the mounting plate (5) and has a second gear (62) that meshes with the first gear (31). The bottom of the second gear (62) is provided with a second directional ratchet (4) that can rotate around its rotation axis. The directional ratchet (4) is provided with a blocking part (41) that extends into the first through hole (51) and is located on the lower side of the first gear (31). The first through hole (51) is provided with outwardly extending clearance grooves (511) on opposite sides of the line (100) connecting the rotation axis of the first gear (31) and the rotation axis of the second gear (62). The blocking part (41) can enter the clearance groove (511) on the corresponding side to avoid the positioning protrusion (311) when the second gear (62) rotates in the first direction, and can leave the clearance groove (511) and abut against the positioning protrusion (311) when the second gear (62) rotates in the second direction, so as to restrict the rotation direction of the rotor (3).

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