A tooth yoke separated stator assembly

Abstract

The present invention relates to the field of motor technology, and specifically to a tooth yoke separated stator assembly, comprising a stator yoke, a stator tooth, a frame and a circuit board, wherein the inner wall of the stator yoke is provided with a first special-shaped groove and a second special-shaped groove, wherein the first special-shaped groove and the second special-shaped groove are arranged to be connected end to end in a plurality of groups, and the outer wall of the stator tooth is provided with a pillar adapted to the first special-shaped groove, and the second special-shaped groove, two groups of adjacent pillars and the corresponding outer ring of the stator tooth form a cavity adapted to the frame, and the frame comprises a base ring, a front plate and a back plate. The tooth yoke separated stator assembly has stable equipment assembly, is modularized, and is convenient for assembly and disassembly, and the frame is equipped with a circuit board with terminals, and the circuit board wiring connects the terminals in a certain order, thereby eliminating tedious parallel wiring, reducing the risk of wiring errors, and improving production efficiency; the circuit board reserves U, V, and W welding point positions, which is convenient for wire harness welding and has good protection for the coil.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a gear-yoke separated stator assembly. Background Art

[0002] As we all know, permanent magnet motors are now widely used in the servo field due to their high power density. However, the interaction between the magnet and the cogging affects the motor torque performance and control accuracy, so the cogging torque has always been a problem that needs to be solved when designing permanent magnet motors.

[0003] The application number is CN201921915035.2, and the patent name is "Gear-yoke separation type permanent magnet motor stator core and permanent magnet motor". A gear-yoke separation type permanent magnet motor stator core and permanent magnet motor are disclosed, which are used to solve the problems that the existing gear-yoke separation type closed slot motor has a low slot filling rate and must use a special insulating skeleton, resulting in high motor manufacturing cost and low motor manufacturing efficiency. The stator core of the present application includes a stator yoke composed of a number of stator yoke modules and a stator tooth portion of an integrated structure; the stator tooth portion includes a stator tooth and a tooth shoe, and two adjacent stator teeth are connected by a tooth shoe shoulder, and a stator slot with a closed slot is formed between two adjacent stator teeth and the tooth shoe; the stator yoke module is provided with a convex tooth, and the top surface of the stator tooth is provided with a groove, and the stator yoke and the stator tooth portion of the integrated structure are connected by the convex tooth and the groove.

[0004] The above structure also has the following disadvantages: the assembly efficiency of the stator yoke blocks is low; the wiring of the stator enameled wire is cumbersome; the stator coil has low protection, and the installation is laborious due to the size matching and fixing during installation. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a tooth-yoke separated stator assembly. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tooth-yoke separated stator assembly, comprising a stator yoke, a stator tooth, a skeleton and a circuit board, the inner wall of the stator yoke is provided with a first special-shaped groove and a second special-shaped groove, the first special-shaped groove and the second special-shaped groove are arranged as a plurality of groups connected end to end, the outer wall of the stator tooth is provided with a support column adapted to the first special-shaped groove, the second special-shaped groove, two groups of adjacent support columns and the corresponding outer ring of the stator tooth enclose a cavity adapted to the skeleton, the skeleton comprises a base ring, a front plate and a back plate, the front and rear sides of the base ring are respectively provided with a front plate fitted to the stator yoke and a back plate fitted to the stator tooth, the front plate and the back plate protrude from the base ring and the stator yoke and are provided with the circuit board, the stator yoke includes a locking assembly, and the locking assembly fixes the skeleton.

[0006] In order to ensure stable installation of the circuit board, the present invention is improved in that a buckle adapted to the circuit board is provided above the front plate near one end of the base ring.

[0007] In order to ensure the stability of the skeleton assembly, the present invention has an improvement in that guide blocks connected to the stator teeth are provided at the upper and lower ends of the back plate, and guide holes matched with the guide blocks are provided on the outer sides of the stator teeth.

[0008] Preferably, a guide groove matched with the guide block is provided on the circuit board.

[0009] Preferably, the circuit board is provided with binding posts, and the binding posts are arranged in a plurality of groups.

[0010] Preferably, there is no disconnecting notch between the stator teeth and the stator yoke.

[0011] Preferably, convex teeth are arranged on both sides of one end of the pillar away from the stator tooth portion, and semicircular grooves adapted to the convex teeth are arranged on both sides of the first special-shaped slot.

[0012] Preferably, the skeleton is made of insulating material.

[0013] Preferably, the locking assembly includes a fixed sleeve, on which a fixed plate is slidably mounted, the fixed plate slides radially along the fixed sleeve, a semicircular groove is arranged on the fixed plate, and a convex tooth is arranged on the stator tooth portion, the convex tooth is stuck in the groove, and the width of the convex tooth is smaller than the semicircular groove of the fixed plate.

[0014] Preferably, a connecting plate is slidably mounted on the fixed sleeve, the connecting plate slides radially along the fixed sleeve, an elliptical rod is rotatably mounted on the connecting plate, the elliptical rod is elliptical, and the framework is pressed against the fixed plate by rotating the elliptical rod.

[0015] Preferably, a rotating sleeve is rotatably mounted on the lower side of the fixed sleeve, an arc-shaped rack is fixedly mounted on the rotating sleeve, a gear is fixedly mounted on the elliptical rod, the gear is meshed with the arc-shaped rack, the axis position changes during the rotation of the elliptical rod, and the arc shape of the arc-shaped rack is completely matched.

[0016] Compared with the prior art, the present invention provides a tooth-yoke separated stator assembly, which has the following beneficial effects:

[0017] (1) The gear yoke separates the stator assembly, the equipment assembly is stable, modular, and easy to assemble and disassemble. The frame is assembled with a circuit board with terminals. The circuit board wiring connects the terminals in a certain order, eliminating the tedious wiring and reducing the risk of wiring errors, thereby improving production efficiency. The circuit board reserves U, V, and W solder joint positions to facilitate wire harness welding and provide good protection for the coil.

[0018] (2) Through the technical solution of the present invention, rotating the rotating sleeve can drive the elliptical rod to rotate and squeeze the fixed plate, and the fixed plate can squeeze the skeleton to fix it. The initial state is not fixed in order to facilitate installation. The fixed sleeve and the rotating sleeve are inserted into the outer side of the stator yoke. At this time, they are loose, which makes installation faster. During the rotation of the elliptical rod, the axis center keeps changing, and the arc-shaped rack can always adapt to the position of the gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the explosion of the structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the main structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the structural skeleton of the present invention;

[0022] Figure 4 It is a schematic diagram of the assembly of the stator yoke and stator teeth of the structure of the present invention;

[0023] Figure 5 The structure of the present invention Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0024] Figure 6 It is an overall schematic diagram of the stator yoke of the structure of the present invention;

[0025] Figure 7 This is an exploded view of the stator yoke of the structure of the present invention;

[0026] Figure 8 This is a bottom view of the stator yoke of the structure of the present invention;

[0027] Fig. 9 The structure of the present invention Figure 8 A local enlarged schematic diagram of the middle A;

[0028] Fig.10 It is a schematic diagram of the elliptical rod structure of the present invention.

[0029] In the figure: 1. stator yoke; 2. stator teeth; 3. circuit board; 4. base ring; 5. front plate; 6. back plate; 7. buckle; 8. guide block; 9. terminal; 10. convex tooth; 101-fixed sleeve; 102-rotating sleeve; 103-slide rail; 104-fixed plate; 105-connecting plate; 106-elliptical rod; 107-arc rack; 108-gear; 109-locking pin; 110-small hole. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-10 A tooth-yoke separated stator assembly comprises a stator yoke 1, a stator tooth 2, a skeleton and a circuit board 3, wherein the inner wall of the stator yoke 1 is provided with a first special-shaped groove and a second special-shaped groove, wherein the first special-shaped groove and the second special-shaped groove are arranged as a plurality of groups connected end to end, and the outer wall of the stator tooth 2 is provided with a pillar adapted to the first special-shaped groove, and the second special-shaped groove, two groups of adjacent pillars and the corresponding outer ring of the stator tooth 2 enclose a cavity adapted to the skeleton, and the skeleton comprises a base ring 4, a front plate 5 and a back plate 6, and the front and rear sides of the base ring 4 are respectively provided with a front plate 5 fitted with the stator yoke 1 and a back plate 6 fitted with the stator tooth 2, and the front plate 5 and the back plate 6 protrude from the base ring 4 and the stator yoke 1 and are provided with the circuit board 3.

[0032] The stator yoke 1 includes a locking assembly, which fixes the frame. The locking assembly includes a fixing sleeve 101, on which a fixing plate 104 is slidably mounted, the fixing plate 104 slides radially along the fixing sleeve 101, a semicircular groove is provided on the fixing plate 104, and a convex tooth 10 is provided on the stator tooth portion 2, the convex tooth 10 is inserted into the groove, and the width of the convex tooth 10 is smaller than the semicircular groove of the fixing plate 104.

[0033] A connecting plate 105 is slidably mounted on the fixed sleeve 101 , and the connecting plate 105 slides radially along the fixed sleeve 101 . An elliptical rod 106 is rotatably mounted on the connecting plate 105 . The elliptical rod 106 is elliptical in shape, and the frame is pressed against the fixed plate 104 by rotating the elliptical rod 106 .

[0034] A rotating sleeve 102 is rotatably mounted on the lower side of the fixed sleeve 101, an arc-shaped rack 107 is fixedly mounted on the rotating sleeve 102, a gear 108 is fixedly mounted on the elliptical rod 106, the gear 108 is meshed with the arc-shaped rack 107, the axis position of the elliptical rod 106 changes during rotation, the arc-shaped rack 107 is completely matched, a ball pin is arranged on the lower side of the fixed sleeve 101 and is fixed by a spring, a locking pin 109 is arranged on the rotating sleeve 102, the ball pin is inserted into the locking pin 109 for positioning, and can be compressed to change position during rotation. Through the above technical solution, rotating the rotating sleeve 102 can drive the elliptical rod 106 to rotate and squeeze the fixed plate 104. The fixed plate 104 can squeeze the skeleton to fix it. The initial state is not fixed for easy installation. The fixed sleeve 101 and the rotating sleeve 102 are inserted into the outer side of the stator yoke 1. At this time, they are loose, which makes installation faster. During the rotation of the elliptical rod 106, the axis center keeps changing, and the arc-shaped rack 107 can always adapt to the position of the gear 108.

[0035] There is no disconnected notch between the stator yoke 1 and the stator tooth 2, which can reduce the motor tooth torque fluctuation; the stator yoke 1 and the stator tooth 2 are processed by die sleeve punching, the skeleton is located in the second special-shaped groove, the pillar is adapted to the first special-shaped groove, and the pillar is provided with convex teeth 10 on both sides of the end away from the stator tooth 2, and the first special-shaped groove is provided with semicircular grooves adapted to the convex teeth 10 on both sides to ensure the stability of assembly, and the front and rear sides of the base ring 4 are provided with a front plate 5 and a back plate 6 protruding from the end of the base ring 4, which provide good protection for the coil, and the circuit board 3 is supported on the front plate 5 and the back plate 6.

[0036] In this embodiment, a buckle 7 adapted to the circuit board 3 is provided above the front plate 5 near one end of the base ring 4, guide blocks 8 connected to the stator tooth portion 2 are provided at the upper and lower ends of the back plate 6, and a guide hole adapted to the guide block 8 is provided on the outer side of the stator tooth portion 2, and a guide groove adapted to the guide block 8 is provided on the circuit board 3. The insulating skeleton is first wound on the outside by a winding method similar to a winding machine, and the winding efficiency is higher than that of a traditional internal winding machine. After the coil is wound on the insulating skeleton, the insulating tape is wrapped around the wire package for one circle to ensure the phase-to-phase insulation between the coils and provide a one-time qualified rate of the stator coil; the wound insulating skeleton component is inserted into the stator tooth portion 2 from the side; there is a buckle 7 locking design on the outlet side of the insulating skeleton to facilitate the locking and fixing of the circuit board 3 behind, and the insulating skeleton has good flexibility.

[0037] In this embodiment, the circuit board 3 is provided with terminals 9, and the terminals 9 are arranged in several groups. The two wires of the coil on each stator tooth 2 are respectively wound around the corresponding terminals 9, and the enameled wire is welded to the terminals 9 by soldering; the circuit board 3 is wired to connect the terminals 9 in a certain order, eliminating cumbersome parallel wiring, reducing the risk of wiring errors, and improving production efficiency; the circuit board 3 reserves U, V, and W solder point positions for easy wiring harness welding.

[0038] The above structure is encapsulated with epoxy potting glue, and epoxy potting glue is used instead of dipping insulating varnish. The epoxy resin potting material wraps the stator winding as a whole and fills the gaps between the copper wires, which greatly improves the mechanical impact performance of the stator and avoids the friction short circuit problem between the copper wires or between the copper wires and the iron core caused by mechanical vibration of the motor winding; the thermal conductivity of the stator is improved by overall potting, and the stator temperature is reduced, which can optimize the motor design and reduce the material cost of the motor; the safety protection level of the copper wire is improved by overall potting, and the direct contact between the copper wire and external oil substances and the like is avoided, and the copper wire is prevented from being damaged by bumps during processing.

[0039] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0040] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0041] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tooth-yoke separated stator assembly, comprising a stator yoke portion (1), a stator tooth portion (2), a frame and a circuit board (3), characterized in that: The inner wall of the stator yoke (1) is provided with a first special-shaped groove and a second special-shaped groove, the first special-shaped groove and the second special-shaped groove are arranged in a plurality of groups connected end to end, the outer wall of the stator tooth (2) is provided with a support column adapted to the first special-shaped groove, the second special-shaped groove, two groups of adjacent support columns and the corresponding outer ring of the stator tooth (2) enclose a cavity adapted to the frame, the stator yoke (1) includes a locking assembly, the locking assembly fixes the frame, and a circuit board (3) is arranged on the frame; The locking assembly comprises a fixed sleeve (101), a fixed plate (104) is slidably mounted on the fixed sleeve (101), the fixed plate (104) slides radially along the fixed sleeve (101), a semicircular groove is provided on the fixed plate (104), a convex tooth (10) is provided on the stator tooth portion (2), the convex tooth (10) is inserted into the groove, and the width of the convex tooth (10) is smaller than the semicircular groove of the fixed plate (104); A connecting plate (105) is slidably mounted on the fixed sleeve (101), the connecting plate (105) slides along the radial direction of the fixed sleeve (101), an elliptical rod (106) is rotatably mounted on the connecting plate (105), the elliptical rod (106) is elliptical, and the frame is pressed against the fixed plate (104) by rotating the elliptical rod (106); A rotating sleeve (102) is rotatably mounted on the lower side of the fixed sleeve (101), an arc-shaped rack (107) is fixedly mounted on the rotating sleeve (102), a gear (108) is fixedly mounted on the elliptical rod (106), the gear (108) is meshed with the arc-shaped rack (107), the axial center position of the elliptical rod (106) changes during rotation, the arc-shaped rack (107) is completely matched, and the fixed sleeve (101) and the rotating sleeve (102) are inserted into the outer side of the stator yoke (1).

2. The tooth-yoke separated stator assembly according to claim 1, characterized in that: The frame comprises a base ring (4), a front plate (5) and a back plate (6); the front plate (5) and the back plate (6) are fixedly mounted on the front and rear sides of the base ring (4) respectively; a buckle (7) adapted to the circuit board (3) is arranged above the front plate (5) near one end of the base ring (4).

3. The tooth-yoke separated stator assembly according to claim 2, characterized in that: Guide blocks (8) connected to the stator teeth (2) are provided at the upper and lower ends of the back plate (6), and guide holes matching the guide blocks (8) are provided on the outer sides of the stator teeth (2).

4. The tooth-yoke separated stator assembly according to claim 3, characterized in that: The circuit board (3) is provided with a guide groove adapted to the guide block (8).

5. The tooth-yoke separated stator assembly according to claim 4, characterized in that: Binding posts (9) are provided on the circuit board (3), and the binding posts (9) are arranged in a plurality of groups.

6. The tooth-yoke separated stator assembly according to claim 5, characterized in that: There is no disconnecting notch between the stator tooth portion (2) and the stator yoke portion (1).

Images