Clamping mechanism

Abstract

A clamping mechanism, comprising a base (1), an inner support (2) and clamping assemblies (3), wherein the base (1) is configured for the placement of a stator (100), and the base (1) can drive the stator (100) to rotate around the axial direction of the stator (100); the inner support (2) is also arranged on the base (1) and can be located on an inner ring of the stator (100); and each clamping assembly (3) comprises a drive frame (31), an elastic separator (32), a limiting member (33) and a pressing member (34), the elastic separator (32), the limiting member (33) and the pressing member (34) are all arranged on the drive frame (31), and a separation portion (322) of the elastic separator (32) can be located between a first layer of wires (1001) and a second layer of wires (1002) of a group of wires.

Description

Clamping mechanism

[0001] This application claims priority to Chinese Patent Application No. 202411195239.9, filed with the Chinese Patent Office on August 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of motor manufacturing technology, for example, to a clamping mechanism. Background Technology

[0003] To reduce the space occupied inside the motor and improve its compactness and efficiency, the ends of the stator winding wires are cut very short to minimize the length of the wires extending out of the winding. The motor has multiple turns of wires arranged radially, and each turn includes multiple wires spaced apart circumferentially. In actual welding, it is necessary to weld two adjacent radially arranged wires together and avoid interference with adjacent circumferentially arranged wires. Because the ends of the wires are short, it is difficult to fix the wires during welding. Deviation in the fixing position of the wires will lead to poor welding effect and affect the product quality of the motor stator winding. Summary of the Invention

[0004] This application provides a clamping mechanism that can solve the clamping problem of multiple wire groups during the welding of motor stator windings, improve the welding effect of the product, and ensure product quality.

[0005] This application provides a clamping mechanism suitable for clamping the conductors of a stator. The stator has multiple sets of conductors spaced circumferentially, and each set of conductors includes a first layer of conductors and a second layer of conductors radially on the stator. The clamping mechanism includes:

[0006] A base for placing the stator, the base being capable of driving the stator to rotate about the stator's axial direction;

[0007] An inner support is provided on the base and can be located in the inner ring of the stator;

[0008] The clamping assembly includes a drive frame, an elastic separator, a limiting member, and a clamping member. The elastic separator, the limiting member, and the clamping member are all disposed on the drive frame. The separating portion of the elastic separator can be located between the first layer of wires and the second layer of wires in a set of wires.

[0009] The drive frame is used to move the limiting member radially along the stator so that the limiting member is located on both sides of a set of conductors in a radial direction perpendicular to the stator. The drive frame is used to move the clamping member radially along the stator so that the clamping member abuts against the first layer of conductors and the partition abuts against the second layer of conductors on the inner support.

[0010] Optionally, the elastic separator includes an elastic element and a separator. The separator includes a connecting portion and a separator that are connected together. The separator is located between the first layer of conductors and the second layer of conductors. The connecting portion is connected to the drive frame through the elastic element. The connecting portion is capable of compressing the elastic element to move toward the separator.

[0011] Optionally, the elastic separator further includes a guide member disposed on the drive frame and passing through the positioning hole of the connecting portion, the guide member extending radially along the stator.

[0012] Optionally, the connecting portion is at least partially located above the wire, and the connecting portion is provided with a clearance hole for avoiding the welding position of the wire.

[0013] Optionally, a positioning groove is provided on the inner support, and the end of the limiting member facing away from the drive frame can be located on both sides of a set of wires and extend into the positioning groove.

[0014] Optionally, multiple sets of positioning slots are provided, and the multiple sets of positioning slots are spaced apart along the circumference of the stator.

[0015] Optionally, the drive frame includes a bracket, a first drive member, and a second drive member, both of which are disposed on the bracket; the limiting member is disposed at the output end of the first drive member, and the first drive member is used to drive the limiting member to move radially along the stator; the clamping member is disposed at the output end of the second drive member, and the second drive member is used to drive the clamping member to move radially along the stator.

[0016] Optionally, the base includes a turntable and a mounting component, the mounting component being disposed on the turntable, the mounting component having a mounting cavity for accommodating the stator, one of the side wall of the mounting cavity and the outer wall of the stator being provided with a limiting groove, and the other being provided with a limiting protrusion, the limiting protrusion being located within the limiting groove.

[0017] Optionally, the base further includes a fixing member, which is disposed on the turntable and passes through the mounting cavity. A retaining ring is provided on the outer periphery of the fixing member, and the inner support is sleeved on the fixing member and located above the retaining ring.

[0018] Optionally, multiple clamping assemblies are provided, and the multiple clamping assemblies are spaced apart along the circumference of the stator. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the clamping mechanism and stator provided in an embodiment of this application;

[0020] Figure 2 is a partial structural schematic diagram of the clamping mechanism provided in an embodiment of this application;

[0021] Figure 3 is a partially enlarged first-view view of the clamping mechanism provided in the embodiment of this application;

[0022] Figure 4 is a partially enlarged view from a second perspective of the clamping mechanism provided in an embodiment of this application;

[0023] Figure 5 is a partially enlarged view from a third perspective of the clamping mechanism provided in the embodiment of this application;

[0024] Figure 6 is a partial enlarged view of the clamping mechanism provided in the embodiment of this application from a fourth perspective.

[0025] In the diagram: 1. Base; 11. Turntable; 12. Mounting component; 120. Mounting cavity; 121. Limiting structure; 122. Supporting structure; 13. Fixing component; 130. Retaining ring; 2. Inner support; 21. Positioning groove; 3. Clamping assembly; 31. Drive frame; 311. Bracket; 312. First drive component; 313. Second drive component; 32. Elastic separator; 321. Connecting part; 3211. Clearance hole; 3212. First end; 3213. Positioning hole; 322. Separator; 323. Elastic component; 324. Mounting shell; 3241. First side wall; 325. Guide component; 33. Limiting component; 331. Limiting sub-component; 34. Tightening component; 4. Support base; 100. Stator; 1001. First layer of conductor; 1002. Second layer of conductor. Detailed Implementation

[0026] The technical solution of this application will be described below with reference to the accompanying drawings and specific embodiments. The embodiments described herein are merely for explaining this application and are not intended to limit it. For ease of description, only the parts relevant to this application are shown in the drawings, and not all of them.

[0027] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the meaning of the above terms in this application according to the circumstances.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0030] The technical solution of this application will be described below with reference to the accompanying drawings and specific embodiments.

[0031] This embodiment provides a clamping mechanism suitable for clamping the conductors of a stator 100. Multiple sets of conductors are spaced circumferentially around the stator 100. Each set of conductors includes a first layer of conductors 1001 and a second layer of conductors 1002 in the radial direction of the stator 100. In implementation, both the first layer of conductors 1001 and the second layer of conductors 1002 consist of two conductors. The clamping mechanism is used to clamp the first layer of conductors 1001 and the second layer of conductors 1002 simultaneously, so that subsequent workers can use a welding mechanism to weld the two conductors of the first layer of conductors 1001 and the two conductors of the second layer of conductors 1002 separately. Effectively fixing the conductors before welding ensures the welding effect and improves the product quality of the stator 100.

[0032] As shown in Figures 1 to 6, the clamping mechanism includes a base 1, an inner support 2, and a clamping assembly 3. The base 1 is used to place the stator 100, and the base 1 can drive the stator 100 to rotate around the axial direction of the stator 100. The inner support 2 is also disposed on the base 1, and the inner support 2 can be placed on the inner ring of the stator 100 after the stator 100 is already on the base 1. The clamping assembly 3 includes a drive frame 31, an elastic separator 32, a limiting member 33, and a tightening member 34. The elastic separator 32, the limiting member 33, and the tightening member 34 are all disposed on the drive frame 31. The separating part 322 of the elastic separator 32 can be located between the first layer of conductors 1001 and the second layer of conductors 1002 of a set of conductors. In the initial state, the limiting member 33 is located outside the stator 100, and the drive frame 31 can drive the limiting member 33 to move radially along the stator 100 so that the limiting member 33 can be located on both sides of a set of conductors perpendicular to the radial direction of the stator 100, thereby limiting the offset of the set of conductors in the radial direction perpendicular to the stator 100. The clamping member 34 is located on the outside of the stator 100, and the drive frame 31 can drive the clamping member 34 to move radially along the stator 100, so that the clamping member 34 gradually approaches the stator 100 and presses against the first layer of wires 1001. The first layer of wires 1001 is located on the side of the second layer of wires 1002 away from the inner ring of the stator 100. When the clamping member 34 presses against the first layer of wires 1001, it can force the first layer of wires 1001 to shift radially toward the side closer to the second layer of wires 1002, so that the partition 322 located between the first layer of wires 1001 and the second layer of wires 1002 can move toward the side of the second layer of wires 1002, so as to force the second layer of wires 1002 to rest against the inner support 2, thereby achieving simultaneous fixation of the first layer of wires 1001 and the second layer of wires 1002 of a set of wires.

[0033] Optionally, as shown in FIG6, the elastic separator 32 includes an elastic element 323 and a separator. The separator includes a connecting portion 321 and a separator 322 connected to each other. The separator 322 is located between the first layer of wires 1001 and the second layer of wires 1002. The connecting portion 321 is connected to the drive frame 31 through the elastic element 323. The connecting portion 321 can compress the elastic element 323 to move toward the separator 322. The elastic separator 32 also includes a mounting shell 324, which is detachably mounted on the drive frame 31. The mounting shell 324 has a cavity, and the first end 3212 of the connecting part 321 extends into the cavity. The second end of the connecting part 321 is located outside the cavity and connected to the separator 322. The elastic member 323 is located inside the cavity and is located between the first end 3212 and the first side wall 3241 of the mounting shell 324. The elastic member 323 extends radially along the stator 100. The first end 3212 and the first side wall 3241 respectively press against the two ends of the extension direction of the elastic member 323. The movement of the connecting part 321 toward the separator 322 forces the elastic member 323 to compress. During implementation, since there is a gap between the first layer of conductor 1001 and the second layer of conductor 1002, the partition 322 can be located within the gap. When the clamping member 34 forces the first layer of conductor 1001 to shift toward the second layer of conductor 1002, it will also force the partition 322 to move toward the side of the second layer of conductor 1002. At this time, the elastic member 323 is compressed so that the partition can move toward the side of the second layer of conductor 1002 as a whole.

[0034] Optionally, as shown in FIG6, the elastic separator 32 further includes a guide 325. The guide 325 is disposed on the drive frame 31 and passes through the positioning hole 3213 of the connecting part 321. The guide 325 extends radially along the stator 100. In this embodiment, the guide 325 is also disposed in the cavity, and the guide 325 is located on the side of the first end 3212 away from the elastic member 323. The positioning hole 3213 is disposed on the first end 3212. The guide 325 passes through the positioning hole 3213 so that the separator can only move back and forth along the extending direction of the guide 325, ensuring the positional accuracy of the separator.

[0035] In this embodiment, a guide limiting protrusion is provided on the outer periphery of the guide member 325. The separator can move along the extension direction of the guide member 325 and abut against the guide limiting protrusion. The guide limiting protrusion is used to limit the maximum distance between the first end 3212 and the first sidewall 3241 in the radial direction of the stator 100. In implementation, the elastic member 323 is always in a compressed state, that is, the elastic member 323 is used to make the separator always have a tendency to move toward the side away from the stator 100. When the force applied by the clamping member 34 to the separator 322 is greater than the elastic force of the elastic member 323, the separator can further compress the elastic member 323 to make the separator move toward the side closer to the stator 100.

[0036] The base 1 provided in this embodiment is only used to drive the stator 100 to rotate around the axial direction of the stator 100. Therefore, in implementation, the stator 100 needs to be placed on the base 1 first, and then the elastic separator 32 needs to be installed on the drive frame 31 so that the separator 322 can be located between the first layer of conductors 1001 and the second layer of conductors 1002. In other embodiments, the base 1 can not only drive the stator 100 to rotate around the axial direction of the stator 100, but also drive the stator 100 to move along the axial direction of the stator 100, so that the separator 322 can be located between the first layer of conductors 1001 and the second layer of conductors 1002 after the stator 100 moves upward.

[0037] Optionally, the connecting portion 321 and the separating portion 322 are arranged at an angle, so that the separating portion 322 can be located between the first layer of conductor 1001 and the second layer of conductor 1002, while the connecting portion 321 is at least partially located above the conductor, and the connecting portion 321 is provided with a clearance hole 3211 for avoiding the welding position. In this embodiment, the portion of the connecting portion 321 extending out of the mounting shell 324 is positioned close to the conductor in the extension direction of the conductor to avoid the obliquely incident laser beam during laser welding.

[0038] Optionally, as shown in Figure 2, the drive frame 31 includes a bracket 311, a first drive member 312, and a second drive member 313. Both the first drive member 312 and the second drive member 313 are mounted on the bracket 311. A limiting member 33 is located at the output end of the first drive member 312. The first drive member 312 drives the limiting member 33 to move radially along the stator 100. A clamping member 34 is located at the output end of the second drive member 313. The second drive member 313 drives the clamping member 34 to move radially along the stator 100. In this embodiment, the limiting member 33 needs to be located on both sides of a set of conductors. Therefore, the limiting member 33 includes two paired limiting sub-members 331, each extending radially along the stator 100. Under the drive of the drive frame 31, the two limiting sub-members 331 of the set of limiting members 33 can simultaneously move radially along the stator 100 to be inserted into both sides of a set of conductors. The clamping member 34 is used to abut against the first layer of conductors 1001 of a set of conductors in the radial direction of the stator 100, that is, the clamping member 34 is located between the two limiting members 331 in the radial direction perpendicular to the stator 100.

[0039] Optionally, the end of the limiting member 331 facing the stator 100 is chamfered to facilitate insertion of this end between two adjacent sets of conductors.

[0040] Optionally, as shown in Figures 3 and 4, a positioning groove 21 is provided on the inner support 2, and the end of the limiting member 33 facing away from the drive frame 31 can extend into the positioning groove 21. In this embodiment, the limiting member 33 includes two limiting sub-members 331 arranged in pairs, so the positioning groove 21 includes two positioning sub-grooves, and one limiting sub-member 331 is inserted into one positioning sub-groove.

[0041] Optionally, multiple sets of positioning slots 21 are provided, and the multiple sets of positioning slots 21 are spaced apart along the circumference of the stator 100. In implementation, since multiple sets of wires are spaced apart along the circumference of the stator 100, in order to ensure that the limiting member 33 can be inserted into the positioning slot 21 when each set of wires is clamped, the number of positioning slots 21 can be set to match the number of sets of wires.

[0042] In other embodiments, the stator 100 can be configured to rotate relative to the inner support 2, that is, the relative position of the inner support 2 and the clamping assembly 3 remains unchanged, so as to ensure that each time the same limiting member 33 moves radially toward the stator 100, it can be inserted into the same set of positioning slots 21.

[0043] To improve the welding efficiency of the stator 100, the clamping mechanism provided in this embodiment includes multiple clamping components 3, which are spaced apart circumferentially along the stator 100. In implementation, to ensure that the positioning grooves 21 on the inner support 2 can simultaneously accommodate multiple clamping components 3, one approach is to match the number of positioning grooves 21 with the number of wire groups; another approach is to match the number of positioning groove groups 21 with the number of clamping components 3. This allows the stator 100 to rotate circumferentially while the relative positions of the inner support 2 and the clamping components 3 on the circumferential direction of the stator 100 remain unchanged, and the limiting member 33 of each clamping component 3 can be inserted into a fixed positioning groove 21.

[0044] Optionally, as shown in Figure 2, the base 1 includes a turntable 11 and a mounting member 12. The mounting member 12 is disposed on the turntable 11 and has a mounting cavity 120 for accommodating the stator 100. A limiting structure 121 is provided within the mounting cavity 120 to restrict the stator 100 and the mounting member 12 from being fixed in the circumferential direction of the stator 100. The limiting structure 121 is either a limiting groove or a limiting protrusion. In practice, one of the side wall of the mounting cavity 120 and the outer wall of the stator 100 is provided with a limiting groove, and the other is provided with a limiting protrusion, with the limiting protrusion located within the limiting groove. In this embodiment, the limiting groove is provided on the outer wall of the stator 100 and extends along the axial direction of the stator 100. When the stator 100 is placed in the mounting cavity 120 along the axial direction of the stator 100, the limiting protrusion on the side wall can be inserted into the limiting groove. When the turntable 11 drives the stator 100 to rotate, the cooperation between the limiting groove and the limiting protrusion can prevent the stator 100 from being eccentric during rotation.

[0045] In this embodiment, as shown in FIG2, the mounting component 12 includes a mounting bracket and a mounting ring. The mounting bracket is used to position the mounting ring above the turntable 11 and to have a mounting gap with the turntable 11. The stator 100 can be placed inside the mounting ring, and the mounting gap is reserved for the placement of the stator 100's wires. Optionally, a support structure 122 is provided on the inner wall of the mounting ring, and the stator 100 is located inside the mounting cavity 120 of the mounting ring and above the support structure 122.

[0046] Optionally, the base 1 further includes a fixing member 13, which is disposed on the turntable 11 and passes through the mounting cavity 120. A retaining ring 130 is provided on the outer periphery of the fixing member 13, and the inner support 2 is sleeved on the fixing member 13 and located above the retaining ring 130. In this embodiment, the fixing member 13 is connected to the turntable 11 through a bearing, that is, the turntable 11 can rotate relative to the fixing member 13, while the fixing member 13 remains stationary. Therefore, when the turntable 11 and the mounting member 12 drive the stator 100 to rotate, the inner support 2 located on the fixing member 13 remains stationary. In other embodiments, the fixing member 13 and the mounting member 12 can both be disposed on the turntable 11, that is, the rotation of the turntable 11 will drive the fixing member 13 and the mounting member 12 to rotate synchronously. Therefore, when the stator 100 rotates, the inner support 2 rotates synchronously with the stator 100. In this case, the number of positioning grooves 21 provided on the inner support 2 needs to be appropriate to the number of sets of wires.

[0047] Optionally, as shown in FIG2, the clamping mechanism further includes a support base 4, and the clamping component 3 and the base 1 are both disposed on the support base 4, so that the clamping mechanism provided in this embodiment can be integrated into a whole.

Claims

1. A clamping mechanism, suitable for clamping the conductors of a stator (100), wherein multiple sets of conductors are arranged circumferentially on the stator (100), and each set of conductors includes a first layer of conductors (1001) and a second layer of conductors (1002) in the radial direction of the stator (100), the clamping mechanism comprising: A base (1) is used to place the stator (100), and the base (1) is capable of driving the stator (100) to rotate about the axis of the stator (100); An inner support (2) is provided on the base (1) and can be located in the inner ring of the stator (100); The clamping assembly (3) includes a drive frame (31), an elastic separator (32), a limiting member (33), and a clamping member (34). The elastic separator (32), the limiting member (33), and the clamping member (34) are all disposed on the drive frame (31). The partition portion (322) of the elastic separator (32) can be located between the first layer of conductors (1001) and the second layer of conductors (1002) of a set of conductors. The drive frame (31) is used to move the limiting member (33) radially along the stator (100) so that the limiting member (33) is located on both sides of a set of conductors in a radial direction perpendicular to the stator (100). The drive frame (31) is used to move the clamping member (34) radially along the stator (100) so that the clamping member (34) presses against the first layer of conductors (1001) and the partition (322) presses against the second layer of conductors (1002) on the inner support (2).

2. The clamping mechanism according to claim 1, wherein, The elastic separator (32) includes an elastic element (323) and a separator. The separator includes a connecting portion (321) and a separator (322) connected to each other. The separator (322) is located between the first layer conductor (1001) and the second layer conductor (1002). The connecting portion (321) is connected to the drive frame (31) through the elastic element (323). The connecting portion (321) can compress the elastic element (323) to move toward the separator (322).

3. The clamping mechanism according to claim 2, wherein, The elastic separator (32) further includes a guide (325), which is disposed on the drive frame (31) and passes through the positioning hole (3213) of the connecting part (321), and the guide (325) extends radially along the stator (100).

4. The clamping mechanism according to claim 2, wherein, The connecting portion (321) is at least partially located above the conductor, and the connecting portion (321) is provided with a clearance hole (3211) for avoiding the welding position of the conductor.

5. The clamping mechanism according to claim 1, wherein, The inner support (2) is provided with a positioning groove (21), and the end of the limiting member (33) away from the drive frame (31) can be located on both sides of a set of wires and extend into the positioning groove (21).

6. The clamping mechanism according to claim 5, wherein, The positioning groove (21) is provided in multiple sets, and the multiple sets of positioning grooves (21) are arranged at intervals along the circumference of the stator (100).

7. The clamping mechanism according to claim 1, wherein, The drive frame (31) includes a bracket (311), a first drive member (312), and a second drive member (313), both of which are mounted on the bracket (311). The limiting member (33) is located at the output end of the first drive member (312), and the first drive member (312) drives the limiting member (33) to move radially along the stator (100). The clamping member (34) is located at the output end of the second drive member (313), and the second drive member (313) drives the clamping member (34) to move radially along the stator (100).

8. The clamping mechanism according to claim 1, wherein, The base (1) includes a turntable (11) and a mounting member (12). The mounting member (12) is disposed on the turntable (11). The mounting member (12) has a mounting cavity (120) for accommodating the stator (100). One of the side wall of the mounting cavity (120) and the outer wall of the stator (100) is provided with a limiting groove, and the other is provided with a limiting protrusion. The limiting protrusion is located in the limiting groove.

9. The clamping mechanism according to claim 8, wherein, The base (1) also includes a fixing member (13), which is disposed on the turntable (11) and passes through the mounting cavity (120). A retaining ring (130) is provided on the outer periphery of the fixing member (13), and the inner support (2) is sleeved on the fixing member (13) and located above the retaining ring (130).

10. The clamping mechanism according to any one of claims 1 to 9, wherein, Multiple clamping components (3) are provided, and the multiple clamping components (3) are spaced apart along the circumferential direction of the stator (100).

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