Positioning mechanism and tool for star point copper bar welding

Abstract

The utility model relates to a positioning mechanism and tool for star point copper bar welding. The positioning mechanism comprises a positioning piece and a driving piece. The positioning piece comprises a placing structure used for accommodating the star point copper bar; the profiling positioning structure is provided with a profiling contour matched with the shape of the star point copper bar, is arranged on the placing structure, and is used for positioning the star point copper bar on the placing structure in a preset form through the profiling contour; the driving part is used for driving the positioning part to move in the preset direction so that the star point copper bar positioned on the positioning part can abut against the target object in a preset form. According to the scheme, the profiling contour matched with the shape of the star point copper bar is arranged, so that the star point copper bar can be integrally positioned on the placement structure in a preset form and can integrally move towards the target object, synchronous contact of welding points of the star point copper bar and welding points of the motor stator is realized, one-time positioning is realized, and the positioning precision is improved. And moreover, the stress balance of each welding point can be ensured, and the production qualification rate and the product consistency are improved.

Description

Technical Field

[0001] This application relates to the field of motor stator welding technology, and in particular to a positioning mechanism and tooling for welding star-shaped copper busbars. Background Technology

[0002] After the flat wire motor completes the twisting operation of the flat wire, the flat wire needs to be welded to the copper busbar to complete the configuration of the input and output ends of the stator.

[0003] In related technologies, star-shaped copper busbars are commonly used for welding flat wires. During the welding process between the flat wire and the star-shaped copper busbar, the multiple welding posts of the star-shaped copper busbar must be precisely aligned with and clamped to the stator flat wire head. Traditional methods often employ step-by-step positioning and manual adjustment, which presents the following problems:

[0004] 1. Low positioning accuracy, large misalignment between the welded column and the flat wire head;

[0005] 2. Requires multiple adjustments, resulting in low efficiency;

[0006] 3. Uneven clamping force leads to unstable welding quality. Utility Model Content

[0007] Based on this, the present invention provides a positioning mechanism and tooling for welding star-shaped copper busbars, so as to solve the problems of low positioning efficiency, poor accuracy and poor stability of existing positioning mechanisms.

[0008] On the one hand, the present invention provides a positioning mechanism for welding star-shaped copper busbars, including a positioning component and a driving component;

[0009] The positioning element includes:

[0010] A placement structure for accommodating the star-shaped copper busbar;

[0011] A contour-following positioning structure has a contour-following profile that matches the shape of the star-shaped copper busbar and is disposed on the placement structure. It is used to position the star-shaped copper busbar in a predetermined shape on the placement structure through the contour-following profile.

[0012] The driving component is used to drive the positioning component to move along a predetermined direction so that the star-shaped copper busbar positioned on the positioning component abuts and aligns with the target object in the predetermined shape.

[0013] In one embodiment, the star-shaped copper busbar includes a connecting busbar and a plurality of welding posts spaced apart on the connecting busbar, and the target object is the flat wire end of the motor stator;

[0014] The step of positioning the star-shaped copper busbar on the placement structure in a predetermined shape includes: when the star-shaped copper busbar is positioned on the placement structure by the contour, the positioning distance between each welding column and each corresponding flat wire end is the same.

[0015] The positioning distance is the distance between the welding column and the corresponding flat wire end in the predetermined direction.

[0016] In one embodiment, the step of aligning the star-shaped copper busbar positioned on the positioning member with the target object in the predetermined shape includes: the welding posts on the star-shaped copper busbar synchronously aligning with the corresponding flat wire ends.

[0017] In one embodiment, the contour is configured to position the star-shaped copper busbar on the side away from the flat wire head in the predetermined direction.

[0018] In one embodiment, the placement structure includes a first positioning groove with an opening facing the flat wire end, the first positioning groove being used to embed the connecting strip, and the contour being disposed on the side of the first positioning groove away from its opening.

[0019] In one embodiment, the placement structure is provided with at least one second positioning groove for embracing the welding column.

[0020] On the other hand, the present invention also provides a tooling for welding star-shaped copper busbars, which includes a lower tooling plate, and the lower tooling plate is provided with a positioning mechanism of any of the above embodiments;

[0021] The lower tooling plate is also provided with a positioning component. The lower tooling plate is positioned on the motor stator by the positioning component, so that the positioning mechanism is aligned with the flat wire end to be welded on the motor stator.

[0022] In one embodiment, the motor stator includes stator windings and a stator core;

[0023] The lower tooling plate is an annular structure that can be sleeved on the outside of the stator winding and supported on the end face of the stator core. The lower tooling plate achieves axial positioning by being supported on the end face of the stator core.

[0024] The positioning component includes:

[0025] A circumferential positioning component includes a fixing key disposed on the lower tooling plate, the fixing key being used to engage with a keyway on the stator core;

[0026] A radial positioning element is provided at intervals along the circumferential direction of the lower tooling plate. The radial positioning element is used to abut against the outer circumferential surface of the stator core when the lower tooling plate is supported on the end face of the stator core.

[0027] In one embodiment, the radial positioning element is a roller rotatably mounted on the lower tooling tray.

[0028] In one embodiment, the tooling further includes a clamping mechanism, which is detachably mounted on the lower tooling plate;

[0029] The clamping mechanism includes:

[0030] The upper tooling plate is used for positioning and engaging with the lower tooling plate via a mating structure.

[0031] A clamping plate, which is disposed on the upper tooling plate, includes an upper clamping plate and a lower clamping plate that can rotate relative to each other. The upper clamping plate and the lower clamping plate are provided with a plurality of corresponding clamping grooves, which are used for flat wire ends and welding columns to pass through.

[0032] A rotating mechanism is used to drive the relative rotation of the upper and lower clamping plates to clamp the flat wire ends and welding posts to be welded, and to release the welded flat wire ends and welding posts.

[0033] Compared with the prior art, this utility model has at least the following beneficial effects:

[0034] This positioning mechanism for welding star-shaped copper busbars uses a contoured design on the positioning component that matches the shape of the star-shaped copper busbar. This allows the entire star-shaped copper busbar to be positioned in a predetermined shape on the placement structure. Driven by the driving component, the entire busbar moves toward the target object, achieving synchronous contact between the welding points on the star-shaped copper busbar and the welding points on the motor stator. This single-step positioning improves production efficiency, ensures balanced stress on each welding point, avoids positioning deviations caused by stress concentration at a single point, eliminates overall assembly deviations, and improves production qualification rate and product consistency. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the positioning mechanism for star-shaped copper busbar welding in one embodiment;

[0036] Figure 2 This is a schematic diagram of the positioning mechanism for star-shaped copper busbar welding in another embodiment;

[0037] Figure 3 This is a schematic diagram of the tooling used for welding star-shaped copper busbars in one embodiment;

[0038] Figure 4This is a schematic diagram of the bottom structure of a tooling used for welding star-shaped copper busbars in one embodiment;

[0039] Figure 5 This is a schematic diagram of the clamping mechanism in one embodiment;

[0040] Figure 6 This is a schematic diagram of the clamping disc in one embodiment;

[0041] Figure 7 This is a schematic diagram of the clamping mechanism assembled on the lower tooling tray in one embodiment;

[0042] Figure 8 This is a schematic diagram of the star-shaped copper busbar structure.

[0043] The reference numerals in the accompanying drawings include: positioning mechanism 100, positioning element 110, placement structure 111, bearing surface 1111, first positioning groove 1112, second positioning groove 1113, contour positioning structure 112, contour 1121, driving element 120, slider 121, guide block 122, lower tooling plate 200, positioning assembly 300, circumferential positioning element 310, radial positioning element 320, clamping mechanism 400, upper tooling plate 410, clamping plate 420, lower clamping plate 421, upper clamping plate 422, clamping groove 423, rotating mechanism 430, connecting plate 431, pull rod 432, hinge seat 433, hinge block 434, handle 435, L-shaped block 436, positioning pin 500, star-shaped copper busbar 600, connecting row 610, and welding column 620. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0045] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model.

[0046] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0047] The orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "middle," "longitudinal," "transverse," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description. They 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, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] As described in the background section, the existing welding positioning of the star-shaped copper busbar welding column and the stator winding flat wire end is mainly achieved through step-by-step positioning and manual adjustment. This method has problems such as low positioning accuracy, low efficiency, uneven force on each welding column, and unstable welding quality.

[0049] In view of this, this utility model provides a positioning mechanism for star-shaped copper busbar welding, which includes a positioning component 110 and a driving component 120.

[0050] Positioning component 110 includes:

[0051] Placement structure 111, which is used to accommodate the star-shaped copper busbar 600;

[0052] The contour positioning structure 112 has a contour profile 1121 that matches the shape of the star copper busbar 600 and is disposed on the placement structure 111. It is used to position the star copper busbar 600 in a predetermined shape on the placement structure 111 by means of the contour profile 1121.

[0053] The driving component 120 is used to drive the positioning component 110 to move in a predetermined direction so that the star-shaped copper busbar 600 positioned on the positioning component 110 abuts and aligns with the target object in a specified shape.

[0054] According to the positioning mechanism 100 provided in this embodiment of the utility model, by setting a contour 1121 on the positioning member 110 that matches the shape of the star copper busbar 600, the star copper busbar 600 as a whole can be positioned on the placement structure 111 in a predetermined shape, and move towards the target object under the drive of the driving member 120, so as to realize the synchronous contact between each welding point on the star copper busbar 600 and each welding point on the motor stator, thereby achieving one-time positioning, improving production efficiency, and ensuring that the force on each welding point is balanced, avoiding positioning offset caused by stress concentration at a single point, eliminating overall assembly deviation, and improving production qualification rate and product consistency.

[0055] The positioning mechanism for star-shaped copper busbar welding provided in the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0056] according to Figure 1 An exemplary embodiment of at least one embodiment of the present invention is shown of a positioning mechanism for star-shaped copper busbar welding. The positioning mechanism 100 includes a positioning member 110 and a driving member 120.

[0057] The positioning component 110 is used to pre-position the star copper busbar 600. Specifically, it pre-positions the overall shape of the star copper busbar 600 so that the star copper busbar 600 can approach the target object in a specified shape and finally abut against the target object, thus achieving one-time positioning of each welding point on the star copper busbar 600.

[0058] The specified form of the star-shaped copper busbar 600 refers to the fact that when the star-shaped copper busbar 600 is close to the target object in this form, it can achieve synchronous contact between each welding point and each welding point of the target object, thereby achieving the purpose of one-time positioning of each welding point of the star-shaped copper busbar 600.

[0059] Specifically, Figure 8 The structure of a star-shaped copper busbar 600 is shown, which includes a connecting busbar 610 and a plurality of welding posts 620 spaced apart on the connecting busbar 610. The welding posts 620 are used for welding to flat wire ends on the motor stator, i.e., the target object is a flat wire end.

[0060] Corresponding to the above-described structure of the star-shaped copper busbar 600, the pre-positioning of the star-shaped copper busbar 600 by the positioning member 110 can be such that the positioning distance between each welded post 620 of the star-shaped copper busbar 600 in a specified shape and its corresponding flat wire end is the same, where the positioning distance is the distance between the welded post 620 and the corresponding flat wire end in the moving direction. Similarly, the star-shaped copper busbar 600 abutting and aligning with the target object in a specified shape means that each welded post 620 on the star-shaped copper busbar 600 simultaneously abuts and aligns with its corresponding flat wire end. In this way, when the positioning member 110 moves along the moving direction, it can make each welded post 620 of the star-shaped copper busbar 600 simultaneously approach each flat wire end, and can achieve the docking and positioning of multiple welded posts 620 on the star-shaped copper busbar 600 with their corresponding flat wire ends at one time, thus improving the positioning efficiency.

[0061] For details, see Figure 1 In this embodiment, the positioning member 110 includes a placement structure 111, which is used to accommodate the star copper busbar 600 so that the star copper busbar 600 can be stably placed on the positioning member 110 to achieve the pre-placement of the positioning member 110.

[0062] See Figure 1 The placement structure 111 can be a plate with a bearing surface 1111 on which the star copper busbar 600 can be stably placed. In use, the star copper busbar 600 is placed on the bearing surface 1111, and the star copper busbar 600 can be moved as a whole towards the flat wire head under the drive of the driving member 120.

[0063] Further, see Figure 2 The placement structure 111 also includes a first positioning groove 1112 for embedding the star-shaped copper busbar 600. The opening of the first positioning groove 1112 is horizontal and faces the side of the flat wire end. The width of the first positioning groove 1112 is equal to or slightly larger than the thickness of the star-shaped copper busbar 600. Thus, during pre-positioning, the star-shaped copper busbar 600 can be embedded into the first positioning groove 1112, and the first positioning groove 1112 limits the star-shaped copper busbar 600 in the thickness direction, ensuring the positioning stability of the star-shaped copper busbar 600 in the thickness direction.

[0064] Furthermore, the placement structure 111 is provided with at least one second positioning groove 1113 for embedding the welding post 620. For example, see... Figure 2 A mounting plate is provided in the middle of the placement structure 111. A vertically penetrating notch is opened at the front end of the mounting plate, which is the second positioning groove 1113. Thus, during pre-positioning, the welding column 620 in the middle of the star copper busbar 600 can be embedded in the second positioning groove 1113. The second positioning groove 1113 can limit the horizontal positioning of the star copper busbar 600, ensuring the horizontal positioning stability of the star copper busbar 600.

[0065] Based on the above, the design of the first positioning groove 1112 and the second positioning groove 1113 effectively limits the radial and axial displacement of the star copper busbar 600, prevents accidental detachment during the pushing process, and ensures the stability of the positioning.

[0066] See Figure 1 The placement structure 111 is also provided with a contour positioning structure 112, which is used to position the star copper busbar 600 on the placement structure 111 in a predetermined shape, so as to achieve the predetermined positioning of the star copper busbar 600.

[0067] For details, see Figure 1 The contour positioning structure 112 includes a contour profile 1121 disposed on the placement structure 111, which matches the shape of the star-shaped copper busbar 600. For example, corresponding to an arc-shaped star-shaped copper busbar 600, the contour profile 1121 can be set to an arc shape; or, for example, corresponding to an irregularly shaped star-shaped copper busbar 600, the contour profile 1121 can be set to an irregular shape. Thus, during pre-positioning, the star-shaped copper busbar 600 is arranged to conform to the contour profile 1121, thereby achieving pre-positioning of the star-shaped copper busbar 600 in a specified shape.

[0068] Furthermore, the contour 1121 matches the shape of the star-shaped copper busbar 600 on the side away from the flat wire end. In other words, the contour 1121 is used to position the star-shaped copper busbar 600 from the side away from the flat wire end. Thus, when the positioning element 110 moves towards the flat wire end, the contour 1121 can push the star-shaped copper busbar 600, ensuring that the star-shaped copper busbar 600 remains in contact with the contour 1121 throughout its movement, thus ensuring accurate positioning. For example, see... Figure 1 and Figure 8 The contour 1121 matches the shape of the side of the connecting row 610 away from the welding column 620.

[0069] Corresponding to the placement structure 111 in the above embodiment having a first positioning groove 1112, the contour 1121 is located on the side of the first positioning groove 1112 away from its opening; that is, the contour 1121 is located at the bottom of the first positioning groove 1112. Thus, during pre-positioning, the star-shaped copper busbar 600 is inserted into the first positioning groove 1112 until it abuts against the contour 1121, thereby achieving pre-positioning of the star-shaped copper busbar 600.

[0070] See Figure 1 and Figure 8 In a specific example, the connecting row 610 of the star copper busbar 600 is generally arc-shaped, and the connecting row 610 is provided with two outward arc-shaped protrusions. Then the contour 1121 is set to be arc-shaped as a whole, with two concave parts in the middle that match the arc-shaped protrusions. In this way, the shape of the star copper busbar 600 and the contour 1121 can be matched.

[0071] In this embodiment, the driving member 120 is used to drive the positioning member 110 to move along a predetermined direction, so as to cause the star-shaped copper busbar 600 positioned on the positioning member 110 to abut and align with the target object in a specified shape. The predetermined direction can be understood as the direction in which the positioning member 110 points towards the flat wire end.

[0072] See Figure 1 The driving component 120 may specifically include a slider 121 and a guide block 122. The positioning component 110 is fixedly connected to the slider 121, and the guide block 122 is provided with a guide groove extending along the predetermined direction. The slider 121 is movably installed in the guide groove. Thus, in use, by pushing the slider 121 to move in the guide groove, the positioning component 110 can be moved, causing the star copper busbar 600 to approach the stator winding, and positioning the welding posts 620 on the star copper busbar 600 with the flat wire ends one by one.

[0073] On the other hand, this embodiment of the invention also provides a tooling for welding star-shaped copper busbars, see [link to relevant documentation]. Figure 3It includes a lower tooling tray 200, on which a positioning mechanism 100 of any of the above embodiments is provided.

[0074] The number of positioning mechanisms 100 on the lower tooling plate 200 can be one or more, such as two, three, or four. Their number and arrangement are mainly determined by the number and arrangement of the star-shaped copper busbars 600 that need to be welded to the motor stator; therefore, no restrictions are imposed here. Figure 2 The example shown is only one embodiment in which the positioning mechanism 100 is provided with four.

[0075] In this embodiment, the lower tooling plate 200 is used to position itself on the motor stator in a specified orientation, thereby achieving precise alignment between the positioning mechanism 100 on the lower tooling plate 200 and each welding point on the motor stator, ensuring that the welding column 620 of the star copper busbar 600 and the flat wire end of the stator winding can be docked and positioned through the positioning mechanism 100.

[0076] Specifically, in this embodiment, the positioning between the lower tooling plate 200 and the motor stator mainly includes axial positioning, circumferential positioning and radial positioning.

[0077] Axial positioning refers to the relative positioning of the lower tooling plate 200 and the motor stator in the axial direction. For example, see... Figure 3 The lower tooling plate 200 is an annular plate structure that can be sleeved on the outside of the stator winding and supported on the end face of the stator core. That is to say, the inner diameter of the lower tooling plate 200 is larger than the outer diameter of the stator winding and smaller than the outer diameter of the stator core. In this way, the lower tooling plate 200 can be supported on the end face of the stator core, thereby realizing the axial positioning between the two.

[0078] The circumferential and radial positioning between the lower tooling plate 200 and the motor stator is achieved by the positioning assembly 300. (See also...) Figure 4 The positioning component 300 specifically includes a circumferential positioning element 310 and a radial positioning element 320.

[0079] The circumferential positioning component 310 includes a fixing key fixedly mounted on the lower tooling plate 200, which engages with a keyway on the stator core. Thus, during installation, by embedding the fixing key on the lower tooling plate 200 into the keyway on the stator core, circumferential positioning of the lower tooling plate 200 and the stator core is achieved, aligning each positioning mechanism 100 on the lower tooling plate 200 with each welding point on the motor stator in the circumferential direction.

[0080] The radial positioning element 320 is used to abut against the outer circumferential surface of the stator core when the lower tooling plate 200 is supported on the end face of the stator core. That is, see [link to relevant documentation]. Figure 4The radial positioning element 320 is disposed below the lower tooling plate 200 and located outside the inner ring of the lower tooling plate 200. Thus, when the lower tooling plate 200 is positioned on the end face of the stator core, the radial positioning element 320 can extend downward from the end face of the stator core to the outer peripheral surface of the stator core, so that it forms a radial positioning with the outer peripheral surface of the stator core.

[0081] Furthermore, multiple radial positioning elements 320 are spaced apart along the circumferential direction of the lower tooling disc 200, for example, Figure 4 An exemplary embodiment is shown in which three radial positioning elements 320 are provided on the lower tooling plate 200, and these three radial positioning elements 320 are spaced apart on the lower tooling plate 200. In this way, by providing multiple radial positioning elements 320, multi-point limiting between the lower tooling plate 200 and the stator core can be achieved, forming a clamping and limiting of the stator core, and ensuring the stability of radial positioning.

[0082] Furthermore, the radial positioning element 320 is radially adjustable on the lower tooling plate 200. For example, the radial positioning element 320 is bolted to the lower tooling plate 200, and the through hole on the radial positioning element 320 for the bolt to pass through is an oblong hole. In this way, the radial positioning element 320 can be radially fine-tuned through the oblong hole, improving the adaptability of the radial positioning element 320 to the outer circumference of the stator core and ensuring the radial positioning effect.

[0083] See Figure 4 In this embodiment, the radial positioning member 320 specifically includes a roller rotatably mounted on the lower tooling plate 200. During the positioning process, the rolling surface of the roller forms a contact limit with the outer peripheral surface of the stator core. This enhances the axial flexibility between the radial positioning member 320 and the stator core, facilitating the installation and removal of the lower tooling plate 200. Of course, in other embodiments, the radial positioning member 320 can also be an arc-shaped block adapted to the shape of the outer peripheral surface of the stator core, making it easier to fit against the outer peripheral surface of the stator core and improving the stability of radial positioning.

[0084] Furthermore, in this embodiment, the tooling also includes a clamping mechanism 400, which is used to clamp the welding post 620 of the positioning star copper busbar 600 and the flat wire end of the stator winding to facilitate welding operations and improve welding stability.

[0085] See Figure 5 The clamping mechanism 400 includes an upper tooling plate 410, a clamping plate 420, and a rotating mechanism 430.

[0086] The upper tooling tray 410 is used to position and mate with the lower tooling tray 200 through a mating structure for assembly. See, for example... Figure 7The upper tooling plate 410 also has a circular structure, and its bottom can be supported on the upper side of the lower tooling plate 200. It can also be positioned and engaged with the lower tooling plate 200 through two positioning pins 500. In this way, the positioning and clamping functions can be integrated into one design, achieving structural integration.

[0087] See Figure 5 and Figure 6 The clamping plate 420 is disposed on the upper tooling plate 410, and includes an upper clamping plate 422 and a lower clamping plate 421 that can rotate relative to each other. Both the upper clamping plate 422 and the lower clamping plate 421 are provided with several axially penetrating clamping grooves 423. The clamping grooves 423 of the upper clamping plate 422 and the lower clamping plate 421 are mainly used for the flat wire end and the welding post 620 to pass through, so as to facilitate the clamping or release of the flat wire end and the welding post 620 by the relative rotation of the upper clamping plate 422 and the lower clamping plate 421, thus providing convenience for welding operations.

[0088] In this embodiment, to clamp multiple sets of flat wire ends and welding posts 620 on the motor stator at once using the clamping plate 420, the number of clamping slots 423 on the upper clamping plate 422 and the lower clamping plate 421 should be at least greater than the number of the sets of flat wire ends and welding posts 620 to be welded, and their arrangement should also be the same. For example, Figure 6 An exemplary embodiment is shown in which the clamping slots 423 are arranged in a circular pattern. This allows the multiple sets of flat wire ends and welding posts 620 that form the positioning points to pass through the corresponding clamping slots 423 on the upper clamping plate 422 and the lower clamping plate 421, facilitating subsequent clamping operations.

[0089] To ensure that the flat wire end forming the positioning and the welding post 620 can simultaneously pass through the clamping groove 423 of the upper clamping plate 422 and the clamping groove 423 of the lower clamping plate 421, see [reference needed]. Figure 6 In this embodiment, the upper clamping plate 422 and the lower clamping plate 421 are stacked, and the clamping grooves 423 of the upper clamping plate 422 and the lower clamping plate 421 are vertically aligned. This allows the relative rotation of the upper clamping plate 422 and the lower clamping plate 421 to achieve mutual alignment and misalignment of the clamping grooves 423 between the upper clamping plate 422 and the lower clamping plate 421. Thus, when the clamping grooves 423 of the upper clamping plate 422 and the lower clamping plate 421 are aligned, the positioning flat wire end and the welding post 620 can pass through the clamping grooves 423 of the upper clamping plate 422 and the lower clamping plate 421 simultaneously; when the clamping grooves 423 of the upper clamping plate 422 and the lower clamping plate 421 are misaligned, the flat wire end and the welding post 620 can be clamped.

[0090] Specifically, in this embodiment, both the upper clamping plate 422 and the lower clamping plate 421 are rotatably mounted on the upper tooling plate 410. For example, an annular groove is provided in the inner ring of the upper tooling plate 410, and both the upper clamping plate 422 and the lower clamping plate 421 are rotatably embedded in the annular groove. In this way, the upper clamping plate 422 and the lower clamping plate 421 can be rotated relative to each other, thereby facilitating the passage and clamping of the flat wire end and the welding post 620. Of course, in other embodiments, the upper clamping plate 422 and the lower clamping plate 421 can also be such that one is fixedly mounted on the upper tooling plate 410, and the other is rotatably mounted on the upper tooling plate 410, which can also achieve relative rotation between the upper clamping plate 422 and the lower clamping plate 421.

[0091] In this embodiment, the rotating mechanism 430 is disposed on the clamping plate 420 and is used to drive the relative rotation of the upper clamping plate 422 and the lower clamping plate 421 to clamp the flat wire end to be welded and the welding post 620, and to release the flat wire end and the welding post 620 after welding.

[0092] In the embodiment where both the upper clamping plate 422 and the lower clamping plate 421 are rotatably configured, the rotating mechanism 430 includes two lever mechanisms, which are respectively connected to the upper clamping plate 422 and the lower clamping plate 421, and are used to drive the rotation of the upper clamping plate 422 and the lower clamping plate 421 respectively.

[0093] The following description uses the elbow mechanism connected to the lower clamp 421 as an example.

[0094] like Figure 5 As shown, in this embodiment, the elbow mechanism includes a connecting plate 431, a pull rod 432, a hinge seat 433, a hinge block 434, and a handle 435.

[0095] The connecting plate 431 has its inner side connected to the lower clamping plate 421 and its outer side extending outward from the lower clamping plate 421. The connecting plate 431 has an elongated oval constraint hole. A hinge seat 433 is fixed to the outer side of the upper tooling plate 410. The hinge seat 433 has a sliding hole in which the pull rod 432 slides. One end of the pull rod 432 passes through the constraint hole and has a limiting head; the other end of the pull rod 432 passes through the sliding hole and extends outward. The handle 435 has an L-shaped block 436 near the end of the hinge seat 433. One end of the L-shaped block 436 is hinged to the end of the pull rod 432 that passes through the sliding hole, and the other end is fixedly connected to the handle 435. A hinge block 434 is hinged between the middle of the hinge seat 433 and the L-shaped block 436. Pulling the handle 435 moves the pull rod 432, thereby rotating the lower clamping plate 421.

[0096] It is understood that the elbow mechanism in this embodiment can also be replaced by other types of existing rotary drive mechanisms.

[0097] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0098] The above embodiments merely illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A positioning mechanism for welding star-shaped copper busbars, characterized in that, It includes a positioning component (110) and a driving component (120); The positioning element (110) includes: Placement structure (111) for accommodating star-shaped copper busbar (600). A contour positioning structure (112) having a contour profile (1121) matching the shape of the star copper busbar (600) and disposed on the placement structure (111) is used to position the star copper busbar (600) in a predetermined shape on the placement structure (111) by means of the contour profile (1121). The driving member (120) is used to drive the positioning member (110) to move in a predetermined direction so that the star-shaped copper busbar (600) positioned on the positioning member (110) abuts and aligns with the target object in the predetermined shape.

2. The positioning mechanism according to claim 1, characterized in that: The star-shaped copper busbar (600) includes a connecting busbar (610) and a plurality of welding posts (620) spaced apart on the connecting busbar (610), and the target object is the flat wire end of the motor stator; The step of positioning the star-shaped copper busbar (600) on the placement structure (111) in a predetermined shape includes: when the star-shaped copper busbar (600) is positioned on the placement structure (111) by the contour (1121), the positioning distance between each welding post (620) and each corresponding flat wire end is the same; The positioning distance is the distance between the welding column (620) and the corresponding flat wire end in the predetermined direction.

3. The positioning mechanism according to claim 2, characterized in that: The step of aligning the star-shaped copper busbar (600) positioned on the positioning member (110) with the target object in the predetermined form includes: each of the welding posts (620) on the star-shaped copper busbar (600) simultaneously aligning with the corresponding flat wire ends.

4. The positioning mechanism according to claim 3, characterized in that: The contour (1121) is configured to position the star-shaped copper busbar (600) on the side away from the flat wire head in the predetermined direction.

5. The positioning mechanism according to claim 4, characterized in that: The placement structure (111) includes a first positioning groove (1112) with an opening facing the flat wire end. The first positioning groove (1112) is used to embed the connecting bar (610). The contour (1121) is located on the side of the first positioning groove (1112) away from its opening.

6. The positioning mechanism according to claim 5, characterized in that: The placement structure (111) is provided with at least one second positioning groove (1113) for embedding the welding column (620).

7. A tooling for welding star-shaped copper busbars, characterized in that, It includes a lower tooling tray (200), on which a positioning mechanism (100) as described in any one of claims 1-6 is provided. The lower tooling plate (200) is also provided with a positioning component (300). The lower tooling plate (200) is positioned on the motor stator by the positioning component (300), so that the positioning mechanism (100) is opposite to the flat wire end to be welded on the motor stator.

8. The tooling according to claim 7, characterized in that: The motor stator includes stator windings and stator core; The lower tooling plate (200) is an annular structure that can be sleeved on the outside of the stator winding and supported on the end face of the stator core. The lower tooling plate (200) achieves axial positioning by being supported on the end face of the stator core. The positioning component (300) includes: A circumferential positioning component (310) includes a fixing key disposed on the lower tooling plate (200), the fixing key being used to engage with a keyway on the stator core; A radial positioning element (320) is provided at intervals along the circumferential direction of the lower tooling plate (200). The radial positioning element (320) is used to abut against the outer circumferential surface of the stator core when the lower tooling plate (200) is supported on the end face of the stator core.

9. The tooling according to claim 8, characterized in that: The radial positioning element (320) includes rollers rotatably mounted on the lower tooling plate (200).

10. The tooling according to claim 7, characterized in that: The tooling also includes a clamping mechanism (400), which is detachably mounted on the lower tooling plate (200); The clamping mechanism (400) includes: Upper tooling plate (410) is used for positioning and engaging with the lower tooling plate (200) via a mating structure; A clamping plate (420) is disposed on the upper tooling plate (410) and includes an upper clamping plate (422) and a lower clamping plate (421) that can rotate relative to each other. The upper clamping plate (422) and the lower clamping plate (421) are provided with a plurality of corresponding clamping grooves (423). The clamping grooves (423) are used for flat wire ends and welding posts (620) to pass through. A rotating mechanism (430) is used to drive the relative rotation of the upper clamp (422) and the lower clamp (421) to clamp the flat wire end to be welded and the welding post (620) and to release the welded flat wire end and the welding post (620).

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