Motor rotor structure

Abstract

The utility model provides a motor rotor structure, which relates to the technical field of motor accessories, and specifically comprises a rotor sleeve and a magnetic ring, the front end and / or the rear end of the rotor sleeve are / is provided with an annular step groove, the magnetic ring is sleeved in the annular step groove, and the magnetic ring and the rotor sleeve are circumferentially fixed through key fit. The side, away from the middle of the rotor sleeve, of the annular stepped groove is provided with a protruding clamping hook, the clamping hook abuts against the magnetic ring to achieve axial fixing of the magnetic ring, and the middle of the rotor sleeve is provided with an installation part used for being connected with a bearing in a sleeved mode. According to the scheme, the annular step groove for sleeving the magnetic ring is formed in the rotor sleeve, the magnetic ring and the rotor sleeve are axially fixed through key fit, and the clamping hook abutting against the magnetic ring is arranged on one side of the annular step groove to axially fix the magnetic ring, so that the connection stability between the rotor sleeve and the magnetic ring is effectively improved.

Description

Technical Field

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

[0002] The main structure of the dimming stepper motor includes a push rod with a screw segment, a winding frame with a coil and a rotor part with magnetic material, wherein the winding frame with the coil serves as a stator part, and the lead end of the coil is connected to the circuit board of the socket by welding, so that when the circuit board energizes the coil, a corresponding magnetic field is generated in the stator structure, driving the rotor part to rotate; the rotor part has an axial screw hole, the screw segment of the push rod is screwed to the screw hole, and the shell has a slide groove for limiting the rotation of the push rod around its own axis, thereby driving the linear movement of the push rod relative to the shell through the rotation of the rotor part.

[0003] The rotor of the existing dimming stepper motor includes a magnetic ring and a screw sleeve. The screw sleeve has an inner screw hole. The magnetic ring is sleeved on the outer side of the screw sleeve in an interference fit manner, so that the magnetic ring and the screw sleeve can rotate synchronously. However, as the use time increases, the magnetic ring and the screw sleeve may gradually loosen or slip relative to each other, affecting normal use. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that the magnetic ring and the screw sleeve of the rotor structure of the motor may become loose and fall off or relatively slip, thus affecting normal use.

[0005] In order to solve the above problems, the utility model provides a motor rotor structure, including a rotor sleeve and a magnetic ring, the front end and / or the rear end of the rotor sleeve is provided with an annular step groove, the magnetic ring is sleeved in the annular step groove, and the magnetic ring and the rotor sleeve are circumferentially fixed by key fitting, a raised hook is provided on the side of the annular step groove away from the middle of the rotor sleeve, the hook abuts against the magnetic ring to achieve axial fixation of the magnetic ring, and the middle part of the rotor sleeve is provided with a mounting portion for the bearing sleeve.

[0006] Compared with the prior art, the above scheme achieves axial fixation of the magnetic ring by providing an annular step groove on the rotor sleeve for the magnetic ring to be sleeved, and at the same time, the magnetic ring and the rotor sleeve are axially fixed by key fitting, and the axial fixation of the magnetic ring is achieved by providing a hook on one side of the annular step groove that abuts against the magnetic ring, thereby effectively improving the connection stability between the rotor sleeve and the magnetic ring.

[0007] In an improved solution, a plurality of ribs spaced apart along the circumferential direction are provided on the side circumferential wall of the rotor sleeve at positions corresponding to the annular step grooves, the ribs are provided with keyways parallel to the axis of the rotor sleeve, and the keyways extend to the side of the ribs away from the middle of the rotor sleeve, and the inner circumferential wall of the magnetic ring is provided with a key for interference fit into the keyway, thereby achieving circumferential fixation between the rotor sleeve and the magnetic ring through the cooperation of the keyway and the keyway.

[0008] In an improved solution, a flared opening is provided on a side of the keyway away from the middle of the rotor sleeve, thereby making it easier to assemble the magnetic ring relative to the rotor sleeve.

[0009] In an improved solution, the ribs are evenly spaced, the keys are evenly spaced and the number of the keys is twice the number of the ribs, so that keys are inserted in the keyways of the ribs and between adjacent ribs, the number of the hooks is equal to the number of the ribs, and the positions of the hooks correspond to the positions between adjacent ribs, a limiting ring protruding inward is provided on the side of the magnetic ring away from the middle of the rotor sleeve, a side of the limiting ring facing the middle of the rotor sleeve is connected to the key, and a side of the limiting ring facing away from the middle of the rotor sleeve abuts against the hook, thereby ensuring an effective connection between the magnetic ring and the rotor sleeve.

[0010] In an improved solution, a U-shaped groove is provided on the side circumferential wall of the rotor sleeve corresponding to the position between two adjacent hooks, so that during the disassembly and assembly of the magnetic ring relative to the annular step groove of the rotor sleeve, the position of the rotor sleeve with the hook can be better elastically deformed, which is more conducive to disassembly and assembly.

[0011] In an improved solution, the number of the ribs is three, the number of the keys is six, and the number of the hooks is three, so that the layout is more reasonable.

[0012] In an improved solution, the mounting portion is an annular groove for stable assembly of the bearing.

[0013] In an improved solution, the rotor sleeve is provided with a screw hole which penetrates along the axial direction, and is used for screwing the screw section of the top rod of the dimming stepping motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an exploded schematic diagram of a motor rotor structure;

[0015] Figure 2 A schematic diagram of the coordination of a rotor sleeve and a magnetic ring of a motor rotor structure;

[0016] Figure 3 A schematic diagram of a magnetic ring of a motor rotor structure;

[0017] Figure 4 A schematic cross-sectional view of a magnetic ring of a motor rotor structure;

[0018] Description of reference numerals:

[0019] 1. Rotor sleeve; 11. Rib plate; 12. Keyway; 12a. Flaring; 13. Annular step groove; 14. Hook; 15. U-shaped groove; 16. Annular groove; 17. Screw hole; 2. Magnetic ring; 21. Insert key; 22. Limiting ring. DETAILED DESCRIPTION

[0020] It should be understood by those skilled in the art that the following embodiments are only used to explain the technical principles of the embodiments of the present application and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art may make adjustments to them as needed to adapt to specific application scenarios.

[0021] In the description of the following embodiments, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0022] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] See also Figure 1-Figure 4 An embodiment of the utility model provides a motor rotor structure, including a rotor sleeve 1 and a magnetic ring 2. The front end and / or rear end of the rotor sleeve 1 is provided with an annular step groove 13, the magnetic ring 2 is sleeved in the annular step groove 13, and the magnetic ring 2 and the rotor sleeve 1 are circumferentially fixed by key fitting. A raised hook 14 is provided on the side of the annular step groove 13 away from the middle of the rotor sleeve 1, and the hook 14 abuts against the magnetic ring 2 to achieve axial fixation of the magnetic ring 2. The middle part of the rotor sleeve 1 is provided with a mounting portion for a bearing sleeve.

[0025] Compared with the prior art, the above scheme provides an annular step groove 13 on the rotor sleeve 1 for the magnetic ring 2 to be sleeved, and the axial fixation of the magnetic ring 2 and the rotor sleeve 1 is achieved by key fitting, and the axial fixation of the magnetic ring 2 is achieved by providing a hook 14 on one side of the annular step groove 13 that abuts against the magnetic ring 2, thereby effectively improving the connection stability between the rotor sleeve 1 and the magnetic ring 2.

[0026] In this embodiment, regarding the key fit between the magnetic ring 2 and the rotor sleeve 1, a plurality of ribs 11 spaced apart along the circumferential direction are provided at the position of the side circumferential wall of the rotor sleeve 1 corresponding to the annular step groove 13, the ribs 11 are provided with a key groove 12 parallel to the axis of the rotor sleeve 1, and the key groove 12 passes through the side of the ribs 11 away from the middle of the rotor sleeve 1, and the inner circumferential wall of the magnetic ring 2 is provided with a key 21 for interference fit to the key groove 12, so that the circumferential fixation between the rotor sleeve 1 and the magnetic ring 2 is achieved through the cooperation of the key groove 12 and the key 21. Of course, in other embodiments, the key groove 12 can also be provided on the magnetic ring 2, and a plurality of keys 21 can be provided at the position of the outer circumferential wall of the rotor sleeve 1 corresponding to the annular step groove 13, which can also achieve the key fit between the magnetic ring 2 and the rotor sleeve 1. Furthermore, a flared opening 12a is provided on the side of the key groove 12 away from the middle of the rotor sleeve 1, so that the assembly of the magnetic ring 2 relative to the rotor sleeve 1 is more convenient.

[0027] As an improvement to the above embodiment, there are three ribs 11 and they are evenly spaced, the keys 21 are evenly spaced and the number of the keys 21 is twice the number of the ribs 11, that is, there are six keys 21, so that the key slots 12 of the ribs 11 and the adjacent ribs 11 are all plugged with the keys 21, the number of the hooks 14 is equal to the number of the ribs 11, that is, there are three hooks 14, and the positions of the hooks 14 correspond to the positions between the adjacent ribs 11, and the magnetic ring 2 is provided on one side away from the middle of the rotor sleeve 1 The limiting ring 22 protrudes inward, and the side of the limiting ring 22 facing the middle of the rotor sleeve 1 is connected to the key 21, and the side of the limiting ring 22 facing away from the middle of the rotor sleeve 1 is abutted to the hook 14; the key 21 located in the keyway 12 of the rib plate 11 is used to achieve circumferential fixation between the magnetic ring 2 and the rotor sleeve 1, and the key 21 located between adjacent rib plates 11 is opposite to the hook 14, ensuring the abutment stability and structural strength between the limiting ring 22 and the hook 14, and finally ensuring the effective connection between the magnetic ring 2 and the rotor sleeve 1.

[0028] Furthermore, a U-shaped groove 15 is provided on the side wall of the rotor sleeve 1 at a position corresponding to the position between two adjacent hooks 14, so that during the disassembly and assembly process of the magnetic ring 2 relative to the annular step groove 13 of the rotor sleeve 1, the position of the rotor sleeve 1 with the hooks 14 can be better elastically deformed, which is more conducive to disassembly and assembly.

[0029] In this embodiment, the mounting portion is an annular groove 16 for the bearing to be stably assembled; the rotor sleeve 1 is provided with a screw hole 17 that penetrates along the axial direction for screwing the screw section of the top rod of the dimming stepping motor.

[0030] It should be noted that, in the description of the present application, the terms "inside", "outside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application. All directional indications (such as up, down, left, right, front, back, inside, and outside) are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0032] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A motor rotor structure, characterized in that: The invention comprises a rotor sleeve (1) and a magnetic ring (2), wherein the front end and / or the rear end of the rotor sleeve (1) is provided with an annular step groove (13), the magnetic ring (2) is sleeved in the annular step groove (13), and the magnetic ring (2) and the rotor sleeve (1) are circumferentially fixed by key fitting, a protruding hook (14) is provided on one side of the annular step groove (13) away from the middle of the rotor sleeve (1), the hook (14) abuts against the magnetic ring (2) to achieve axial fixation of the magnetic ring (2), and a mounting portion for a bearing sleeve is provided in the middle of the rotor sleeve (1).

2. A motor rotor structure according to claim 1, characterized in that: The side circumferential wall of the rotor sleeve (1) is provided with a plurality of ribs (11) spaced apart in the circumferential direction at positions corresponding to the annular step groove (13); the ribs (11) are provided with keyways (12) parallel to the axis of the rotor sleeve (1), and the keyways (12) extend through the side of the ribs (11) away from the middle of the rotor sleeve (1); and the inner circumferential wall of the magnetic ring (2) is provided with a key (21) for interference fitting into the keyway (12).

3. A motor rotor structure according to claim 2, characterized in that: A flared opening (12a) is provided on one side of the keyway (12) away from the middle of the rotor sleeve (1).

4. The motor rotor structure according to claim 2, characterized in that: The ribs (11) are evenly spaced, the keys (21) are evenly spaced and the number of the keys (21) is twice the number of the ribs (11), so that the keys (21) are inserted into the keyways (12) of the ribs (11) and between adjacent ribs (11), the number of the hooks (14) is equal to the number of the ribs (11), and the positions of the hooks (14) correspond to the positions between adjacent ribs (11), and a limiting ring (22) protruding inward is provided on a side of the magnetic ring (2) away from the middle of the rotor sleeve (1), the limiting ring (22) is connected to the key (21) on a side facing the middle of the rotor sleeve (1), and the limiting ring (22) is abutted against the hook (14) on a side facing away from the middle of the rotor sleeve (1).

5. The motor rotor structure according to claim 4, characterized in that: A U-shaped groove (15) is provided on the side circumferential wall of the rotor sleeve (1) at a position corresponding to the position between two adjacent hooks (14).

6. A motor rotor structure according to claim 4 or 5, characterized in that: The number of the ribs (11) is three, the number of the insertion keys (21) is six, and the number of the hooks (14) is three.

7. The motor rotor structure according to claim 1, characterized in that: The mounting portion is an annular groove (16).

8. The motor rotor structure according to claim 1, characterized in that: The rotor sleeve (1) is provided with a screw hole (17) penetrating along the axial direction.

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