A clamping device

Abstract

The utility model relates to a clamping device for copper wire welding of a flat wire motor, comprising a first limit member, a second limit member and a limit fork. The first limit member comprises a plurality of first limit holes spaced apart along its circumference and a plurality of limit grooves spaced apart along its circumference, wherein the plurality of limit grooves are close to the first side of the plurality of first limit holes; the second limit member comprises a plurality of second limit holes spaced apart along its circumference and a plurality of limit protrusions spaced apart along its circumference, wherein the plurality of limit protrusions are close to the first side of the plurality of second limit holes; the limit fork is arranged on the upper surface of the first limit member and the second limit member, one end of the limit fork is arranged in the limit groove, and the side of the limit fork is arranged between two adjacent limit protrusions. The utility model reduces the thickness of the clamping device and reduces the height of the welding end.

Description

Technical Field

[0001] The utility model relates to the field of clamping, in particular to a clamping device. Background Art

[0002] With the continuous development of new energy vehicles, the demand for drive motors, which are the core components of new energy vehicles, is also increasing. At present, the flat wire motor is the most widely used in new energy vehicles, so the requirements for the production process of flat wire motors are also getting higher and higher. Flat wire stators are important components of flat wire motors. During the production process, after the copper wire is inserted into the stator core and tightened, it is necessary to connect the copper wire into one by welding.

[0003] In the existing copper wire welding process, a clamping device is required. The copper wire welding clamping device of the flat wire motor currently available on the market usually includes upper and lower clamping discs, which rotate circumferentially to fix the copper wire, wherein the upper and lower clamping discs are at least 3mm thick to prevent them from deformation, and the thickness of the tangent disc is at least 3mm, so the straight section length of the copper wire is required to be at least 9mm, resulting in a relatively high height of the welding end of the stator copper wire. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] According to an embodiment of the utility model, a clamping device is provided for welding copper wires of a flat wire motor, comprising:

[0006] The first limiting member comprises a plurality of first limiting holes spaced apart along its circumference and a plurality of limiting grooves spaced apart along its circumference, wherein the plurality of limiting grooves are close to a first side of the plurality of first limiting holes;

[0007] A second limiting member is located outside the first limiting member, the second limiting member comprises a plurality of second limiting holes spaced apart along its circumference and a plurality of limiting protrusions spaced apart along its circumference, the plurality of limiting protrusions are close to a first side of the plurality of second limiting holes, and a notch of each of the limiting grooves faces between two adjacent limiting protrusions;

[0008] The limiting fork is arranged on the upper surfaces of the first limiting member and the second limiting member, one end of the limiting fork is arranged in the limiting groove, and the side of the limiting fork is arranged between the two adjacent limiting protrusions corresponding to the limiting groove.

[0009] In some embodiments, the limiting fork includes a first limiting fork and a second limiting fork, and the first limiting fork and the second limiting fork are alternately arranged on the upper surfaces of the first limiting member and the second limiting member along the circumference of the first limiting member.

[0010] In some embodiments, the side portion of the first limit fork includes a first tooth portion, the first tooth portion includes a plurality of teeth arranged in sequence at a preset distance, the side portion of the second limit fork includes a second tooth portion, the second tooth portion includes a plurality of teeth arranged in sequence at a preset distance, and the plurality of teeth of the first tooth portion and the plurality of teeth of the second tooth portion cooperate with each other to form a plurality of limit spaces.

[0011] In some embodiments, the first tooth portion includes a first tooth, a second tooth, and a third tooth arranged in sequence, wherein the first tooth is close to the first end of the first limiting fork, and the extension length of the first tooth in the first direction is greater than the extension lengths of the second tooth and the third tooth in the first direction, and the second tooth portion includes a fourth tooth, a fifth tooth, and a sixth tooth arranged in sequence, wherein the fourth tooth is close to the first end of the second limiting fork, and the extension length of the sixth tooth in the first direction is greater than the extension lengths of the fourth tooth and the fifth tooth in the first direction, wherein the second tooth cooperates with the fourth tooth, and the third tooth cooperates with the fifth tooth.

[0012] In some embodiments, the angle between the lower surface and the side of the limiting fork is chamfered.

[0013] In some embodiments, the limiting fork is provided with a slot near the other end thereof.

[0014] In some embodiments, the clamping device further includes a tray, which is located below the limiting fork and is used to support the limiting fork.

[0015] In some embodiments, the first limiting member and the second limiting member are both annular structures, the plurality of first limiting holes are opened near the outer circumference of the first limiting member, and the plurality of second limiting holes are opened near the inner circumference of the second limiting member.

[0016] In some embodiments, a size of the first limiting hole along the circumference of the first limiting member is greater than a size of the second limiting hole along the circumference of the second limiting member.

[0017] The utility model has the beneficial effects:

[0018] By setting the first and second limiters arranged inside and outside, radial limit is realized, and radial locking and circumferential fixation are realized by the limit fork. Since the first and second limiters are arranged inside and outside, the thickness of the clamping device is reduced. In addition, since the arrangement of the first and second limiters is not subject to external force, it is not easy to deform. In addition, the limit fork is small in size and not easy to deform, so the processing flatness can be guaranteed. The utility model can effectively reduce the height of the welding end.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features and advantages of the present invention are described below, which explains the present invention in more detail based on embodiments in conjunction with the accompanying drawings.

[0021] Figure 1 An exploded view of a clamping device according to an embodiment of the utility model;

[0022] Figure 2 A top view of an assembled clamping device according to an embodiment of the utility model;

[0023] Figure 3 for Figure 2 Section view along AA;

[0024] Figure 4 It is a structural schematic diagram of a first position-limiting member according to an embodiment of the utility model;

[0025] Figure 5 for Figure 2 A cross-sectional view of

[0026] Figure 6 It is a structural schematic diagram of a second position-limiting member according to an embodiment of the utility model;

[0027] Figure 7 for Figure 6 A cross-sectional view of

[0028] Figure 8 It is a schematic structural diagram of a first limiting fork according to an embodiment of the utility model;

[0029] Fig. 9 A top view of a first limiting fork according to an embodiment of the utility model;

[0030] Fig.10 It is a schematic structural diagram of a second limiting fork according to an embodiment of the utility model;

[0031] Fig.11 A top view of a second limiting fork according to an embodiment of the utility model;

[0032] Fig.12 A schematic diagram of the installation of a first stopper and a second stopper according to an embodiment of the utility model

[0033] Fig.13 It is a schematic diagram showing a first limiting member and a second limiting member installed in place according to an embodiment of the utility model;

[0034] Fig.14 It is a schematic diagram showing a clamping device in use according to an embodiment of the utility model. Description of the drawings:

[0036] 100, clamping device; 110, first limiting member; 111, first limiting hole; 1111, first side of first limiting hole; 112, limiting groove; 120, second limiting member; 121, second limiting hole; 1211, first side of second limiting hole; 122, limiting protrusion; 130, limiting fork; 131, first limiting fork; 1311, first tooth portion; 13111, first tooth; 13112, second tooth ; 13113, third tooth; 1312, first end portion of the first limit fork; 132, second limit fork; 1321, second tooth portion; 13211, fourth tooth; 13212, fifth tooth; 13213, sixth tooth; 1322, first end portion of the second limit fork; 133, slot; 134, side portion; 200, multi-layer copper wire; 210, inner copper wire; 220, middle copper wire; 230, outer copper wire. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be noted that the terms "upper", "lower", "left", "right", "front", "back" and similar expressions used herein are only for the purpose of illustration and are not intended to limit the present invention.

[0038] The utility model provides a clamping device 100 for welding copper wires of flat wire motors. Figure 1-Figure 7 The clamping device 100 includes a first limiting member 110, a second limiting member 120 and a limiting fork 130, wherein:

[0039] The first limiting member 110 includes a plurality of first limiting holes 111 and a plurality of limiting grooves 112 arranged at intervals along the circumference thereof, wherein the plurality of limiting grooves 112 are close to a first side 1111 of the first limiting hole, wherein the first side 1111 of the first limiting hole is a side of the first limiting hole 111 close to the axis of the first limiting member 110;

[0040] The second limiting member 120 is arranged outside the first limiting member 110, and the second limiting member 120 includes a plurality of second limiting holes 121 spaced apart along its circumference and a plurality of limiting protrusions 122 spaced apart along its circumference, the plurality of second limiting members 120 are close to the first side 1211 of the second limiting hole, and the notch of each limiting groove 112 faces between two adjacent limiting protrusions 122; wherein the first side 1211 of the second limiting hole is the side of the second limiting hole 121 away from the axis of the second limiting member 120;

[0041] The limiting fork 130 is arranged on the upper surfaces of the first limiting member 110 and the second limiting member 120 , one end of the limiting fork 130 is arranged in the limiting groove 112 , and the side portion 134 of the limiting fork 130 is arranged between two adjacent limiting protrusions 122 corresponding to the limiting groove 112 .

[0042] In the above implementation process, radial limiting is achieved by the first limiting member 110 and the second limiting member 120 arranged inside and outside; radial locking and circumferential fixation are achieved by the limiting fork 130. On the one hand, since the first limiting member 110 and the second limiting member 120 are arranged inside and outside, rather than the conventional upper and lower arrangement, the thickness of the clamping device 100 is reduced, for example, from the original 6mm to 3mm; on the other hand, since the arrangement of the first limiting member and the second limiting member is not subject to external force and is not easy to deform, and the limiting fork is small in size and not easy to deform, the processing flatness can be guaranteed, so the tangent disk that may be additionally set can be eliminated. Combining the above two reasons, the utility model can effectively reduce the height of the welding end. For example, the original H-pin welding end height is 45mm. Under the condition that the product specifications remain unchanged, the clamping device of the utility model can achieve an ultra-low welding of 39mm.

[0043] In some embodiments, see Figure 1-Figure 11 and Fig.14 The limiting fork 130 includes a first limiting fork 131 and a second limiting fork 132. The first limiting fork 131 and the second limiting fork 132 are alternately arranged on the upper surfaces of the first limiting member 110 and the second limiting member 120 along the circumference of the first limiting member 110 and cooperate with each other to achieve circumferential limiting.

[0044] Specifically, the side portion 134 of the first limiting fork 131 includes a first tooth portion 1311, the first tooth portion 1311 includes a plurality of teeth arranged in sequence at a preset distance, the side portion 134 of the second limiting fork 132 includes a second tooth portion 1321, the second tooth portion 1321 includes a plurality of teeth arranged in sequence at a preset distance, the plurality of teeth of the first tooth portion 1311 and the plurality of teeth of the second tooth portion 1321 cooperate with each other to form a plurality of limiting spaces.

[0045] In the above implementation process, by providing the first limiting fork 131 and the second limiting fork 132 that match each other, after the limiting fork is in place, the copper wire is locked in the radial direction and fixed in the circumferential direction. The multiple teeth on the first limiting fork 131 and the multiple teeth on the second limiting fork 132 cooperate with each other to define multiple limiting spaces, so that accurate radial limiting, radial locking and circumferential fixing can be achieved.

[0046] See also Figure 8-Figure 11The first tooth portion 1311 includes a first tooth 13111, a second tooth 13112 and a third tooth 13113 arranged in sequence, wherein the first tooth 13111 is close to the first end 1312 of the first limiting fork, the first end 1312 of the first limiting fork is the end of the first limiting fork located in the limiting groove 112, the extension length L1 of the first tooth 13111 in the first direction X is greater than the extension lengths L2 and L3 of the second tooth 13112 and the third tooth 13113 in the first direction X, and the second tooth portion 1321 includes a fourth tooth 1321 arranged in sequence. 1. The fifth tooth 13212 and the sixth tooth 13213, wherein the fourth tooth 13211 is close to the first end 1322 of the second limit fork, the first end 1322 of the second limit fork is the end of the second limit fork located in the limit groove 112, and the extension length L6 of the sixth tooth 13213 in the first direction X is greater than the extension lengths L4 and L5 of the fourth tooth 13211 and the fifth tooth 13212 in the first direction X, wherein the second tooth 13112 cooperates with the fourth tooth 13211, and the third tooth 13113 cooperates with the fifth tooth 13212. Specifically, the second tooth 13112 and the fourth tooth 13211 are located on the same circumferential surface, and the third tooth 13113 and the fifth tooth 13212 are located on the same circumferential surface. By setting teeth of different lengths, radial locking and circumferential fixation are achieved. In the above implementation process, the first tooth 13111, the second tooth 13112 and the fourth tooth 13211 jointly define a limiting space; the second tooth 13112, the fourth tooth 13211, the third tooth 13113 and the fifth tooth 13212 jointly define a limiting space; the third tooth 13113, the fifth tooth 13212 and the sixth tooth 13213 jointly define a limiting space.

[0047] In order to facilitate the guide when the limit fork is axially lowered and placed, and to avoid bending the copper wire to be welded, the angle between the lower surface of the limit fork 130 and the side portion 134 is chamfered, for example, a chamfer of C0.5. The utility model does not impose a specific restriction on the size of the chamfer, and the size of the chamfer can be set according to actual needs.

[0048] In some embodiments, the limit fork 130 is provided with a slot 133 near the other end thereof to facilitate automation, wherein the other end of the limit fork 130 is the end of the limit fork 130 away from the axis of the first limit member 110. In some embodiments, a pallet is further included, and the pallet is located below the limit fork 130 to support the limit fork 130. Specifically, the servo motor moves the limit fork 130 in the radial direction of the first limit member 110 through the slot 133, and moves the limit fork up and down in the axial direction of the first limit member 110 through the pallet, so that the limit fork 130 is driven by the servo motor and can automatically move forward and backward in the radial direction and up and down in the axial direction.

[0049] In some embodiments, the first limiting member 110 and the second limiting member 120 are both annular structures, a plurality of first limiting holes 111 are opened near the outer circumference of the first limiting member 110 , and a plurality of second limiting holes 121 are opened near the inner circumference of the second limiting member 120 .

[0050] In some embodiments, see Figure 4 , Figure 6 and Fig.13 The size of the first limiting hole 111 along the circumferential direction of the first limiting member 110 is greater than the size of the second limiting hole 121 along the circumferential direction of the second limiting member 120. By setting limiting holes of different sizes, the installation speed of the clamping device can be improved without affecting the control accuracy.

[0051] In actual application, taking the application of the clamping device 100 in the welding of copper wires of a flat wire motor as an example, the use process of the clamping device 100 is as follows:

[0052] See also Figure 12-14 The copper wire of the flat wire motor includes a multi-layer copper wire 200, and the multi-layer copper wire 200 includes an inner copper wire 210, a middle copper wire 220 and an outer copper wire 230 from the inside to the outside. Before installing the clamping device 100, ensure the interlayer spacing of the stator copper wires, so that the first limiter 110 and the second limiter 120 can smoothly drop the multi-layer copper wire 200 to limit the copper wire, and the limit fork 130 can be embedded in the desired position along the gap between the copper wires. Specifically, the first limiter 110 and the second limiter 120 are first installed between the multi-layer copper wires 200, the inner copper wire 210 is accommodated in a plurality of first limit holes 111, the outer copper wire 230 is accommodated in a plurality of second limit holes 121, and the middle copper wire 220 is accommodated between the first limiter 110 and the second limiter 120, thereby realizing the radial limitation of the multi-layer copper wire 200. Since the first limit member 110 and the second limit member 120 are arranged inside and outside, that is, arranged along the radial direction of the motor, there is no overlap, so the arrangement of the first limit member and the second limit member is not subject to external force and is not easy to deform. Moreover, since the first limit member 110 and the second limit member 120 are arranged inside and outside (that is, arranged along the radial direction of the motor), rather than arranged up and down (that is, arranged along the axial direction of the motor), the thickness of the clamping device 100 can be reduced, for example, from the original 6mm to 3mm. During actual installation, the first limit member 110 and the second limit member 120 can be installed at the same time or one after another. Next, the limit fork 130 is installed, and multiple limit forks 130 are arranged in sequence between the corresponding limit groove 112 and the two adjacent limit protrusions 122 corresponding to the limit groove 112, so as to achieve radial fastening and circumferential limitation of the multi-layer copper wire 200. Specifically, the first limiting fork 131 may be placed and kept stationary, and then the second limiting fork 132 may be placed and moved in the radial direction, thereby locking the copper wire.

[0053] In the above application, radial limitation of the multi-layer copper wire 200 is achieved by arranging the first and second limiting members 110, 120 arranged inside and outside on the end face of the stator core of the motor. Specifically, the inner copper wire 210 is fixed by the first limiting member 110, the outer copper wire 230 is fixed by the second limiting member 120, and the middle copper wire 220 is fixed by the first limiting member 110 and the second limiting member 120, thereby achieving radial fixation of the multi-layer copper wire 200; by arranging the limiting fork 130, multiple limiting forks 130 are arranged along the circumferential direction, and multiple limiting forks 130 are arranged between the copper wires in different slots, thereby achieving radial locking and circumferential fixation of the multi-layer copper wire 200. On the one hand, since the first limiter 110 and the second limiter 120 are arranged along the radial direction of the motor, rather than the conventional arrangement along the axial direction of the motor, the thickness of the clamping device 100 is reduced, for example, from the original 6mm to 3mm; on the other hand, since the arrangement of the first limiter and the second limiter is not subject to external force and is not easily deformed, and the volume of the limiter fork is small and not easily deformed, the processing flatness of the multi-layer copper wire can be guaranteed, and the cutter can be almost close to the limiter fork to cut the multi-layer copper wire, so the cutting disk can be eliminated. Therefore, the utility model can effectively reduce the height of the welding end of the motor copper wire. For example, the original H-pin welding end height is 45mm. Under the condition that the product specifications remain unchanged, the ultra-low welding clamping device of the utility model can reach 39mm.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0058] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A clamping device (100) for welding copper wires of flat wire motors, characterized in that: include: A first limiting member (110) comprises a plurality of first limiting holes (111) spaced apart along its circumference and a plurality of limiting grooves (112) spaced apart along its circumference, wherein the plurality of limiting grooves (112) are close to a first side (1111) of the plurality of first limiting holes (111); A second limiting member (120) is located outside the first limiting member (110), the second limiting member (120) comprising a plurality of second limiting holes (121) spaced apart along its circumference and a plurality of limiting protrusions (122) spaced apart along its circumference, the plurality of limiting protrusions (122) being close to a first side (1211) of the plurality of second limiting holes (121), and a notch of each of the limiting grooves (112) faces between two adjacent limiting protrusions (122); A limiting fork (130) is arranged on the upper surfaces of the first limiting member (110) and the second limiting member (120), one end of the limiting fork (130) is arranged in the limiting groove (112), and a side portion (134) of the limiting fork (130) is arranged between the two adjacent limiting protrusions (122) corresponding to the limiting groove (112).

2. The clamping device (100) according to claim 1, characterized in that: The limiting fork (130) comprises a first limiting fork (131) and a second limiting fork (132), wherein the first limiting fork (131) and the second limiting fork (132) are alternately arranged on the upper surfaces of the first limiting member (110) and the second limiting member (120) along the circumferential direction of the first limiting member (110).

3. The clamping device (100) according to claim 2, characterized in that: The side portion (134) of the first limiting fork (131) includes a first tooth portion (1311), the first tooth portion (1311) includes a plurality of teeth arranged in sequence at a preset distance, the side portion (134) of the second limiting fork (132) includes a second tooth portion (1321), the second tooth portion (1321) includes a plurality of teeth arranged in sequence at a preset distance, and the plurality of teeth of the first tooth portion (1311) and the plurality of teeth of the second tooth portion (1321) cooperate with each other to form a plurality of limiting spaces.

4. The clamping device according to claim 3, characterized in that: The first tooth portion (1311) comprises a first tooth (13111), a second tooth (13112) and a third tooth (13113) which are arranged in sequence, wherein the first tooth (13111) is close to the first end portion (1312) of the first limiting fork, and an extension length of the first tooth (13111) in the first direction is greater than an extension length of the second tooth (13112) and the third tooth (13113) in the first direction, and the second tooth portion (1321) comprises a fourth tooth (13211), a second tooth (13212) and a third tooth (13113) which are arranged in sequence. A fifth tooth (13212) and a sixth tooth (13213), wherein the fourth tooth (13211) is close to the first end portion (1322) of the second limiting fork, and the extension length of the sixth tooth (13213) in the first direction is greater than the extension length of the fourth tooth (13211) and the fifth tooth (13212) in the first direction, wherein the second tooth (13112) cooperates with the fourth tooth (13211), and the third tooth (13113) cooperates with the fifth tooth (13212).

5. The clamping device (100) according to claim 1, characterized in that: The angle between the lower surface of the limiting fork (130) and the side portion (134) is a chamfer.

6. The clamping device (100) according to claim 1, characterized in that: The limiting fork (130) is provided with a slot hole (133) near the other end thereof.

7. The clamping device (100) according to claim 5, characterized in that: It also includes a tray, which is located below the limiting fork (130) and is used to support the limiting fork (130).

8. The clamping device (100) according to claim 1, characterized in that: The first limiting member (110) and the second limiting member (120) are both annular structures; the plurality of first limiting holes (111) are opened close to the outer peripheral side of the first limiting member (110); and the plurality of second limiting holes (121) are opened close to the inner peripheral side of the second limiting member (120).

9. The clamping device (100) according to claim 1, characterized in that: The dimension of the first limiting hole (111) along the circumferential direction of the first limiting member (110) is greater than the dimension of the second limiting hole (121) along the circumferential direction of the second limiting member (120).

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