Assembly jig for surface-mounted rotor

Abstract

The utility model relates to an assembly jig of a surface-mounted rotor, the assembly jig of the surface-mounted rotor comprises a positioning disc and a plurality of positioning parts arranged on the positioning disc, and the plurality of positioning parts are uniformly arranged at intervals along the circumferential direction of the positioning disc to define an iron core positioning space; the interval space between any two adjacent positioning parts is used for positioning the magnetic block; the distances from the ends, close to the central axis of the positioning disc, of the positioning parts to the central axis are equal. Therefore, the iron core and the plurality of magnetic blocks are reliably positioned respectively, so that the magnetic blocks are uniformly distributed on the peripheral surface of the iron core, surface magnetic distribution, air gap distribution and magnetic density distribution uniformity of the surface-mounted rotor are facilitated, and the motor performance is further improved. In addition, the assembly jig for the surface-mounted rotor is simple in structure and convenient to operate during use.

Description

Technical Field

[0001] The present application relates to the technical field of motor assembly tools, and in particular to an assembly jig for a surface mounted rotor. Background Art

[0002] Surface mount rotors have many advantages, such as simple structure, low manufacturing cost, easy installation, and small moment of inertia. By optimizing the magnetic poles of surface mount rotors, the motor can achieve more superior electromagnetic performance. Motors with surface mount rotors (such as brushless DC motors) can be used in fields and occasions such as robots and servo motor development.

[0003] The structure of the surface mounted rotor generally includes an iron core, a magnetic block, a protective cover, etc. The production process of the surface mounted rotor mainly includes: attaching the magnetic block to the outer circumference of the iron core, and then putting the protective cover on the outside of the magnetic block. After the surface mounted rotor is assembled, if the magnetic blocks are unevenly distributed, the surface magnetic distribution, air gap and magnetic flux density of the surface mounted rotor will be uneven, thus affecting the performance of the motor.

[0004] In some technical solutions of the prior art, when installing magnetic blocks on the surface mounted rotor, multiple cylinders are used to press the multiple magnetic blocks together on the outer peripheral surface of the iron core. Since cylinders are needed, the cost is high and the use is inconvenient. In some other technical solutions, multiple magnetic blocks are positioned by designing positioning fixtures without the use of power devices such as cylinders, but the positioning fixtures used are relatively complex in structure and inconvenient to operate when used. Utility Model Content

[0005] Based on this, it is necessary to provide an assembly jig for a surface mounted rotor to address the technical problem that in the prior art, a positioning jig is designed to position multiple stator blocks when the surface mounted rotor is assembled into a circle, but the positioning jig used has a relatively complex structure and is inconvenient to operate during use.

[0006] A surface mounted rotor assembly jig comprises a positioning plate and a plurality of positioning portions arranged on the positioning plate, wherein the plurality of positioning portions are evenly spaced along the circumference of the positioning plate to enclose an iron core positioning space; the spacing space between any two adjacent positioning portions is used to position a magnetic block; and the distances from one end of each positioning portion close to the central axis of the positioning plate to the central axis are equal.

[0007] In one embodiment, at least two push holes are provided on the positioning plate, the push holes are arranged corresponding to the spacing space, and the push holes and the spacing space are arranged along the axial direction of the positioning plate; the assembly jig also includes a push portion arranged corresponding to the push hole, and the push portion is used to pass through the corresponding push hole to push the magnetic block in the spacing space.

[0008] In one embodiment, the plurality of positioning portions are disposed on an axial end surface of the positioning plate.

[0009] In one embodiment, the positioning plate is provided with a receiving groove, and the receiving groove is located between the pushing hole and the spacing space; the assembly jig also includes a protective pad, and the protective pad is used to be placed in the receiving groove so that the pushing part can push the magnetic block in the spacing space through the protective pad; wherein the hardness of the protective pad is less than the hardness of the pushing part.

[0010] In one embodiment, the push portion is threadably matched with the push hole.

[0011] In one embodiment, the positioning plate is provided with an inner hole, and the plurality of positioning portions are arranged on the hole wall of the inner hole.

[0012] In one embodiment, the inner hole of the positioning plate is a through hole; the assembly jig also includes a supporting portion and a pressing portion, the supporting portion is provided with a supporting surface for supporting the positioning plate, and the supporting surface is provided with a receiving hole; the pressing portion is used to press the connecting structure of the iron core and the magnetic block into the receiving hole.

[0013] In one embodiment, the supporting portion is further provided with a positioning hole connected to the receiving hole, the positioning plate is adapted to the positioning hole, the inner diameter of the receiving hole is smaller than the inner diameter of the positioning hole, so that a step surface is formed at the connection between the hole wall of the receiving hole and the hole wall of the positioning hole, and the step surface is the supporting surface.

[0014] In one embodiment, one end of the extrusion portion has a pressing surface, and the pressing surface is used to press on one end of the iron core; the extrusion portion has a protrusion protruding from the pressing surface, and the protrusion is adapted to the inner hole of the iron core.

[0015] In one embodiment, the assembly fixture also includes a sleeve portion, the sleeve portion is provided with a stepped hole, the stepped hole includes a first hole and a second hole, the inner diameter of the first hole is larger than the inner diameter of the second hole, so that a step surface is formed at the connection between the first hole and the hole wall of the second hole; the inner diameter of the first hole is adapted to the outer diameter of the protective cover of the surface-mounted rotor, and the inner diameter of the second hole is adapted to the outer diameter of the magnetic block of the surface-mounted rotor.

[0016] In one embodiment, the assembly jig further includes a guide portion, the guide portion is adapted to the inner hole of the iron core, the sleeve is not provided with a guide hole connected to the second hole, and the guide portion is adapted to the guide hole and can move relatively.

[0017] In the assembly jig of the surface-mounted rotor, a plurality of positioning parts are evenly spaced and arranged along the circumference of the positioning disk to enclose the core positioning space, and the spacing space formed between any adjacent positioning parts is used to position the magnetic blocks. The core of the surface-mounted rotor can be placed in the core positioning space, a plurality of magnetic blocks can be placed in each spacing space in a one-to-one correspondence, and the magnetic blocks can be bonded to the outer circumference of the core, so as to realize that the plurality of magnetic blocks are respectively installed on the outer circumference of the core. Among them, since the distance from one end of each positioning part close to the central axis of the positioning disk to the central axis is equal, the core positioning space defined by one end of each positioning part close to the central axis of the positioning disk is a regular circular space, so that it can be well adapted to the shape of the core and accurately and reliably position the core. At the same time, since a plurality of positioning parts are evenly spaced and arranged along the circumference of the positioning disk, a plurality of spacing spaces arranged evenly are formed, so that the plurality of magnetic blocks located in each spacing space are evenly spaced and arranged along the circumference of the positioning disk. In this way, the iron core and the plurality of magnetic blocks are reliably positioned, so that the magnetic blocks are evenly distributed on the outer circumference of the iron core, which is conducive to the uniform distribution of the surface magnetic field, air gap and magnetic flux density of the surface mounted rotor, thereby improving the motor performance. Moreover, the assembly fixture of the surface mounted rotor has a simple structure and is easy to operate when used. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic structural diagram of an assembly fixture for a surface mounted rotor according to an embodiment.

[0019] Figure 2 for Figure 1 Schematic diagram of the coordination relationship between an assembly fixture and a plurality of magnetic blocks and an iron core.

[0020] Figure 3 for Figure 2 sectional view of .

[0021] Figure 4 for Figure 3 Schematic diagram of the coordination relationship between the structure shown, the push portion and the protective pad.

[0022] Figure 5 The sleeve portion and the guide portion of an embodiment are matched to each other. Figure 3 Schematic diagram of a protective cover being provided outside the magnetic block of the structure shown.

[0023] Figure 6 for Figure 5 A partial enlarged view of area A.

[0024] Figure 7 The figure is a schematic structural diagram of a surface mounted rotor according to an embodiment of the present invention.

[0025] Figure 8 FIG. 4 is a schematic diagram of the connection relationship between the positioning plate and the positioning portion of another embodiment.

[0026] Fig. 9 for Figure 8 Schematic diagram of the coordination relationship between the structure shown and the iron core and magnetic block.

[0027] Fig.10 It is a schematic diagram of the sleeve portion and the press-out portion cooperating to separate the magnetic block and the iron core from the positioning plate in one embodiment.

[0028] Fig.11 It is a schematic diagram of another embodiment in which the guide part and the sleeve part are sleeved with a protective sleeve on the outside of the magnetic block.

[0029] Description of Figure Numbers:

[0030] 10. Iron core; 20. Magnetic block; 30. Protective cover;

[0031] 100, positioning plate; 101, inner hole of positioning plate; 110, push hole; 120, push portion; 130, receiving groove; 140, protective pad;

[0032] 200, positioning portion; 210, core positioning space; 220, spacing space;

[0033] 310, supporting portion; 311, supporting surface; 312, receiving hole; 313, positioning hole; 320, pressing portion; 321, pressing surface; 322, protruding portion;

[0034] 410, sleeve portion; 411, first hole; 412, second hole; 413, step surface; 414, guide hole;

[0035] 420, guide portion; 421, first guide section; 422, second guide section. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0038] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the 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. The first feature being "below", "below" and "below" the 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.

[0041] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0042] Please combine Figure 1 and Figure 2 An embodiment of the present application provides an assembly jig for a surface mounted rotor (hereinafter referred to as an assembly jig), the assembly jig comprising a positioning plate 100 and a plurality of positioning portions 200 disposed on the positioning plate 100, the plurality of positioning portions 200 being evenly spaced along the circumference of the positioning plate 100 to enclose an iron core positioning space 210. The spacing space 220 between any two adjacent positioning portions 200 is used to position the magnetic block 20. The distances from one end of each positioning portion 200 close to the central axis of the positioning plate 100 to the central axis are equal.

[0043] In the assembly jig of the surface mounted rotor, a plurality of positioning portions 200 are evenly spaced and arranged along the circumference of the positioning disk 100 to enclose an iron core positioning space 210, and the spacing space 220 formed between any adjacent positioning portions 200 is used to position the magnetic block 20. The iron core 10 of the surface mounted rotor can be placed in the iron core positioning space 210, a plurality of magnetic blocks 20 can be placed in each spacing space 220 in a one-to-one correspondence, and the magnetic blocks 20 can be bonded to the outer circumference of the iron core 10, so as to realize that the plurality of magnetic blocks 20 are respectively installed on the outer circumference of the iron core 10. Among them, since the distance from one end of each positioning portion 200 close to the central axis of the positioning disk 100 to the central axis is equal, the iron core positioning space 210 defined by one end of each positioning portion 200 close to the central axis of the positioning disk 100 is a regular circular space, so that it can be well adapted to the shape of the iron core 10, thereby realizing accurate and reliable positioning of the iron core 10. At the same time, since the multiple positioning parts 200 are evenly spaced around the circumference of the positioning disk 100, multiple evenly spaced intervals 220 are formed, so that the multiple magnetic blocks 20 located in each interval 220 are evenly spaced along the circumference of the positioning disk 100. In this way, by reliably positioning the iron core 10 and the multiple magnetic blocks 20 respectively, the magnetic blocks 20 are evenly distributed on the outer circumference of the iron core 10, which is conducive to the uniform distribution of the surface magnetic field, air gap and magnetic density of the surface-mounted rotor, thereby improving the performance of the motor. Moreover, the assembly fixture of the surface-mounted rotor has a simple structure and is easy to operate when used.

[0044] In actual operation, adhesive can be applied on the outer surface of the core 10 first, the magnetic block 20 can be placed in the corresponding spacing space 220, and the magnetic block 20 can be pressed against the outer surface of the core 10, so that the magnetic block 20 can be bonded to the outer surface of the core 10 through the adhesive.

[0045] After placing the plurality of magnetic blocks 20 in the corresponding spacing spaces 220, before the adhesive is cured, the plurality of magnetic blocks 20 can be quickly pushed in the same circumferential direction (e.g., clockwise or counterclockwise) so that each magnetic block 20 abuts against its adjacent positioning portion 200 in the same circumferential direction. In this way, the uniformity of the circumferential arrangement of the plurality of magnetic blocks 20 can be further ensured.

[0046] In some related technical solutions, after all the magnetic blocks are bonded to the iron core, the adhesive causes the connection structure between the magnetic blocks and the iron core to be bonded to the assembly jig, making it difficult to separate the connection structure between the magnetic blocks and the iron core from the assembly jig.

[0047] To do this, combine Figures 2 to 4 In one embodiment of the present application, at least two push holes 110 are provided on the positioning disk 100, and the push holes 110 are provided corresponding to the spacing spaces 220, and the push holes 110 and the spacing spaces 220 are arranged along the axial direction of the positioning disk 100. The assembly jig also includes a push portion 120 provided corresponding to the push hole 110, and the push portion 120 is used to pass through the corresponding push hole 110 to push the magnetic block 20 in the spacing space 220.

[0048] Specifically, the push hole 110 is located on one side of the spacing space 220 along the axial direction of the positioning disk 100, and the push hole 110 extends along the axial direction of the positioning disk 100. Therefore, the push portion 120 can pass through the push hole 110 along the axial direction of the positioning disk 100, so that the push portion 120 can push the magnetic block 20 in the spacing space 220 along the axial direction of the positioning disk 100. In this way, it is convenient to apply force to the magnetic block 20, so as to separate the connection structure between the magnetic block 20 and the iron core 10 from the assembly jig.

[0049] In some embodiments, the number of the push holes 110 is the same as the number of the spacing spaces 220. The push holes 110 and the spacing spaces 220 are arranged one by one, so that the plurality of magnetic blocks 20 can be pushed through the corresponding push holes 110 by the plurality of push portions 120, thereby further facilitating the separation of the connection structure between the magnetic block 20 and the core 10 and the assembly jig.

[0050] In other embodiments, the number of the push holes may be smaller than the number of the spacing spaces.

[0051] refer to Figure 1 and Figure 2 In one embodiment, a plurality of positioning portions 200 are disposed on the axial end surface of the positioning plate 100 .

[0052] In other embodiments, an inner hole may be provided at the center of the positioning disk, and a plurality of positioning portions may be provided on the hole wall of the inner hole of the positioning disk. The inner hole has a bottom wall, such as a blind hole. Thus, a push hole may be provided on the bottom wall of the inner hole, and the push portion may also pass through the push hole to push the magnetic block.

[0053] Combination Figures 1 to 4 In one embodiment, the positioning plate 100 is provided with a receiving groove 130, and the receiving groove 130 is located between the push hole 110 and the spacing space 220. One side of the receiving groove 130 is connected to the spacing space 220, and the other side is connected to the push hole 110.

[0054] The assembly jig further includes a protective pad 140, which is used to be placed in the receiving groove 130, so that the push portion 120 can push the magnetic block 20 in the spacing space 220 through the protective pad 140. The hardness of the protective pad 140 is less than that of the push portion 120.

[0055] The push portion 120 pushes the protective pad 140, so that the protective pad 140 pushes the magnetic block 20 in the spacing space 220, so that the connection structure between the magnetic block 20 and the core 10 is separated from the assembly jig. The protective pad 140 with a relatively small hardness is in direct contact with the magnetic block 20, avoiding direct contact between the push portion 120 and the magnetic block 20, which can reduce damage to the magnetic block 20. The push portion 120 with a relatively large hardness pushes the protective pad 140, so that a relatively large push force can be provided.

[0056] The protective pad 140 is made of, for example, plastic, etc. The pushing portion 120 is made of, for example, metal material such as iron or stainless steel.

[0057] Combination Figures 1 to 4 In one embodiment, the receiving groove 130 is a groove that is recessed radially inward from the outer circumference of the positioning plate 100. In this way, the protective pad 140 can be placed into the receiving groove 130 from the outer circumference of the positioning plate 100 for easy placement.

[0058] In one embodiment, the push portion 120 is threadedly matched with the push hole 110, so that the push portion 120 can be moved axially along the positioning plate 100 by rotating the push portion 120, so as to apply force to the push portion 120. The push portion 120 is, for example, a bolt.

[0059] Please combine Figures 5 and 6 In one embodiment, the assembly jig further includes a sleeve portion 410, the sleeve portion 410 is provided with a stepped hole, the stepped hole includes a first hole 411 and a second hole 412, the inner diameter of the first hole 411 is larger than the inner diameter of the second hole 412, so that a step surface 413 is formed at the connection between the hole walls of the first hole 411 and the second hole 412. The inner diameter of the first hole 411 is adapted to the outer diameter of the protective cover 30 of the surface mounted rotor.

[0060] When the protective cover 30 is sleeved on the outside of the magnetic block 20, the sleeve portion 410 can be used. Specifically, the protective cover 30 is placed in the first hole 411 adapted thereto. Then, one end of the protective cover 30 is sleeved on the outside of one end of the connection structure between the magnetic block 20 and the iron core 10 by moving the sleeve portion 410. Then, by moving the sleeve portion 410 along the axial direction of the iron core 10, the sleeve portion 410 pushes the protective cover 30 to move synchronously along the axial direction of the iron core 10 through the step surface 413, and then the protective cover 30 is sleeved on the outside of the magnetic block 20. In this way, with the help of the sleeve portion 410 of this embodiment, it is convenient to sleeve the protective cover 30 on the outside of the magnetic block 20.

[0061] Preferably, the inner diameter of the second hole 412 is adapted to the outer diameter of the magnetic block 20 of the surface-mounted rotor. In this way, when the sleeve portion 410 moves along the axial direction of the core 10 until the second hole 412 is sleeved outside the magnetic block 20, the cooperation between the second hole 412 and the magnetic block 20 can guide the sleeve portion 410 to continue to move stably along the axial direction of the core 10 to avoid skewing.

[0062] Please combine Figures 5 and 6 In one embodiment, the assembly jig further includes a guide portion 420, which is adapted to the inner hole of the core 10. The sleeve portion 410 is provided with a guide hole 414 connected to the second hole 412, and the guide portion 420 is adapted to the guide hole 414 and can move relatively.

[0063] When the protective cover 30 is sheathed on the outside of the magnetic block 20, the guide part 420 can be inserted into the inner hole of the iron core 10, and the guide part 420 can be inserted into the guide hole 414, so that the guide part 420, the iron core 10, and the sheath part 410 are coaxially positioned. In this way, by moving the sheath part 410 along the guide part 420, the sheath part 410 can be accurately and reliably guided to move along the axial direction of the iron core 10, so that the protective cover 30 can be smoothly and accurately sheathed on the outside of the magnetic block 20, as shown in FIG. Figure 7 shown.

[0064] Please refer to Figure 8 In another embodiment, the positioning plate 100 is provided with an inner hole 101 , and a plurality of positioning portions 200 are disposed on the hole wall of the inner hole 101 .

[0065] Please refer to Figures 8 to 10 In one embodiment, the inner hole 101 of the positioning plate 100 is a through hole. The assembly jig further includes a supporting portion 310 and a pressing portion 320. The supporting portion 310 is provided with a supporting surface 311 for supporting the positioning plate 100. The supporting surface 311 is provided with a receiving hole 312. The pressing portion 320 is used to press the connection structure of the iron core 10 and the magnetic block 20 into the receiving hole 312.

[0066] In this embodiment, if the adhesive causes the connection structure between the magnetic block and the core to be bonded to the assembly jig (positioning disk 100), it is difficult to separate the connection structure between the magnetic block and the core from the assembly jig (positioning disk 100). The axial end surface of the positioning disk 100 can be placed on the support surface 311. The pressure is applied to the connection structure between the core 10 and the magnetic block 20 along the axial direction of the positioning disk 100 by the pressing portion 320, so that the connection structure between the core 10 and the magnetic block 20 passes through the inner hole 101 (through hole) and enters the receiving hole 312. It can be seen that the structure of the support portion 310 and the pressing portion 320 of this embodiment facilitates the separation of the connection structure between the core 10 and the magnetic block 20 from the positioning disk 100. Among them, the inner diameter of the receiving hole 312 is larger than the outer diameter of the magnetic block 20, so that the connection structure between the core 10 and the magnetic block 20 can enter the receiving hole 312.

[0067] In one embodiment, a buffer portion (not shown) is provided inside the receiving hole 312, so that when the connection structure of the iron core 10 and the magnetic block 20 enters the receiving hole 312, the buffer portion can buffer it to avoid falling damage. The buffer portion is, for example, a foam pad.

[0068] refer to Fig.10 In one embodiment, the support portion 310 is further provided with a positioning hole 313 communicating with the receiving hole 312, and the positioning plate 100 is adapted to the positioning hole 313. The inner diameter of the receiving hole 312 is smaller than the inner diameter of the positioning hole 313, so that a step surface is formed at the connection between the hole wall of the receiving hole 312 and the hole wall of the positioning hole 313, and the step surface is the support surface 311.

[0069] When the positioning plate 100 is placed on the support surface 311, the positioning plate 100 is located in the positioning hole 313, so that the positioning plate 100 can be positioned. When the connecting structure of the iron core 10 and the magnetic block 20 is pressed by the pressing portion 320, the positioning plate 100 is prevented from shifting, which is conducive to the accurate axial movement of the connecting structure of the iron core 10 and the magnetic block 20 along the inner hole 101, so that the connecting structure of the iron core 10 and the magnetic block 20 and the positioning plate 100 are easily separated.

[0070] refer to Fig.10 In one embodiment, one end of the pressing portion 320 has a pressing surface 321, and the pressing surface 321 is used to press on one end of the iron core 10. The pressing portion 320 has a protrusion 322 protruding from the pressing surface 321, and the protrusion 322 is adapted to the inner hole of the iron core 10.

[0071] When the connection structure between the core 10 and the magnetic block 20 is pressurized by the extrusion portion 320, the clamping surface 321 is pressed against one end of the core 10. At the same time, the protrusion 322 can be inserted into the inner hole of the core 10 and fit therewith. Thus, the cooperation between the protrusion 322 and the core 10 can realize the positioning between the extrusion portion 320 and the core 10. When the connection structure between the core 10 and the magnetic block 20 is pressurized by the extrusion portion 320, the extrusion portion 320 can be prevented from being deflected relative to the core 10, which is conducive to the extrusion portion 320 accurately applying force and moving the connection structure between the core 10 and the magnetic block 20 along the axial direction of the inner hole 101, so that the connection structure between the core 10 and the magnetic block 20 is easy to separate from the positioning plate 100.

[0072] refer to Fig.11 In one embodiment, the guide portion 420 includes a first guide segment 421 and a second guide segment 422 connected to each other, wherein the first guide segment 421 is adapted to the inner hole of the core 10, and the second guide segment 422 is adapted to the guide hole 414 and can move relatively. The outer diameter of the second guide segment 422 is smaller than the outer diameter of the first guide segment 421.

[0073] When the protective cover 30 is sleeved on the outside of the magnetic block 20, the first guide section 421 can be inserted into the inner hole of the iron core 10, and the second guide section 422 can be inserted into the guide hole 414, so that the guide part 420, the iron core 10, and the sleeve part 410 are coaxially positioned. In this way, by moving the sleeve part 410 along the second guide section 422, the sleeve part 410 can be accurately and reliably guided to move along the axial direction of the iron core 10, so that the protective cover 30 can be smoothly and accurately sleeved on the outside of the magnetic block 20.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An assembly jig for a surface mounted rotor, characterized in that: The assembly fixture of the surface mounted rotor includes a positioning plate and a plurality of positioning parts arranged on the positioning plate, wherein the plurality of positioning parts are evenly spaced along the circumference of the positioning plate to enclose an iron core positioning space; the spacing space between any two adjacent positioning parts is used to position the magnetic block; and the distance from one end of each positioning part close to the central axis of the positioning plate to the central axis is equal.

2. The assembly jig according to claim 1, characterized in that: The positioning disk is provided with at least two push holes, the push holes are arranged corresponding to the spacing spaces, and the push holes and the spacing spaces are arranged along the axial direction of the positioning disk; The assembly jig further includes a pushing portion arranged corresponding to the pushing hole, and the pushing portion is used to pass through the corresponding pushing hole to push the magnetic block in the spacing space.

3. The assembly jig according to claim 1 or 2, characterized in that: The plurality of positioning portions are arranged on an axial end surface of the positioning plate.

4. The assembly jig according to claim 2, characterized in that: The positioning plate is provided with a receiving groove, and the receiving groove is located between the push hole and the spacing space; The assembly jig also includes a protection pad block, which is used to be placed in the accommodating groove so that the push portion can push the magnetic block in the spacing space through the protection pad block; wherein the hardness of the protection pad block is less than the hardness of the push portion.

5. The assembly jig according to claim 2, characterized in that: The push portion is threadably matched with the push hole.

6. The assembly jig according to claim 1, characterized in that: The positioning plate is provided with an inner hole, and the plurality of positioning portions are arranged on the hole wall of the inner hole.

7. The assembly jig according to claim 6, characterized in that: The inner hole of the positioning plate is a through hole; the assembly jig also includes a supporting portion and a pressing portion, the supporting portion is provided with a supporting surface for supporting the positioning plate, and the supporting surface is provided with a receiving hole; the pressing portion is used to press the connecting structure of the iron core and the magnetic block into the receiving hole.

8. The assembly jig according to claim 7, characterized in that: The support portion is further provided with a positioning hole connected to the receiving hole, the positioning plate is adapted to the positioning hole, the inner diameter of the receiving hole is smaller than the inner diameter of the positioning hole, so that a step surface is formed at the connection between the hole wall of the receiving hole and the hole wall of the positioning hole, and the step surface is the support surface; and / or, One end of the pressing part has a pressing surface, and the pressing surface is used to press on one end of the iron core; the pressing part has a protruding part protruding from the pressing surface, and the protruding part is adapted to the inner hole of the iron core.

9. The assembly jig according to claim 1, characterized in that: It also includes a sleeve portion, which is provided with a stepped hole, and the stepped hole includes a first hole and a second hole, the inner diameter of the first hole is larger than the inner diameter of the second hole, so that a step surface is formed at the connection between the hole walls of the first hole and the second hole; the inner diameter of the first hole is adapted to the outer diameter of the protective cover of the surface-mounted rotor, and the inner diameter of the second hole is adapted to the outer diameter of the magnetic block of the surface-mounted rotor.

10. The assembly jig according to claim 9, characterized in that: It also includes a guide part, which is matched with the inner hole of the iron core. The sleeve is not provided with a guide hole connected with the second hole. The guide part is matched with the guide hole and can move relatively.

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