Welding tool for motor shell

Abstract

The welding tool comprises a working table, a rotating platform is rotationally installed on the upper end face of the working table, a horizontal base plate is installed on the upper end face of the rotating platform, an annular table is arranged on the inner side of the upper end face of the horizontal base plate, and a plurality of positioning vertical plates distributed at intervals in the annular direction are fixedly arranged on the outer side of the upper end face of the horizontal base plate. A motor shell containing cavity with an upward opening is defined by the multiple positioning vertical plates and the upper end face of the horizontal base plate. A base plate assembly connected to the peripheral side of the annular table in a sleeving mode is further laid on the upper end face of the horizontal base plate, and positioning holes used for inserting and positioning vertical plates on the motor shell are formed in the base plate assembly. And the concentricity positioning assembly is used for positioning the concentricity of the upper bottom plate and the cover plate of the motor shell. The positioning and splicing accuracy of all the parts on the tool is good, it is guaranteed that the consistency of the appearance size of a motor shell finished product formed through welding is good, and the percent of pass and the overall welding efficiency are both improved; the 360-degree welding operation requirement is met by rotating the rotating platform, the welding accessibility is good, and the labor amount and the fatigue feeling of operators are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of motor housing welding technology, and specifically to a welding fixture for motor housings. Background Technology

[0002] The motor housing is a core protective component in rail transit traction motors, primarily serving structural support and protection. Generally made of carbon steel, its high mechanical strength allows it to effectively support the motor's internal components such as the rotor and stator, and withstand impact loads and vibrations during operation, ensuring the overall structural stability of the motor. Furthermore, the motor housing is typically a fully welded cylindrical structure, effectively preventing external contaminants such as dust and moisture from entering the motor, thus helping to extend the service life of critical internal components (such as windings and bearings).

[0003] like Figures 1-2The diagram shows a motor housing for a rail transit traction motor, comprising a base plate A, a cover plate B, a U-shaped enclosure C, and a straight enclosure D. The cover plate B is positioned parallel to and above the base plate A. The U-shaped enclosure C is vertically welded and clamped between the left, rear, and right edges of the base plate A and the cover plate B, with its opening facing forward. The straight enclosure D is vertically welded and clamped between the right front edge of the base plate A and the cover plate B. An opening F is formed between the front end of the left arm of the U-shaped enclosure C and the left end of the straight enclosure D, located at the left front corner of the motor housing. An opening M is formed between the front end of the right arm of the U-shaped enclosure C and the right end of the straight enclosure D, located at the front end of the right side wall of the motor housing. The base plate A and the cover plate B have coaxially corresponding central holes. Several vertical plates E, vertically distributed around the outer periphery of the central holes of the base plate A and the cover plate B, are also welded circumferentially between them. The outer side of the left front corner of the base plate A and the cover plate B is welded... A second vertical plate G is attached. The middle part of the right vertical edge of the second vertical plate G is welded to the front edge of the left arm of the U-shaped enclosure C. A third vertical plate H located on the left side inside the first opening F and a fourth vertical plate J located on the right side inside the first opening F are also vertically welded between the bottom plate A and the cover plate B. The right end of the inner side of the fourth vertical plate J is welded and fixedly connected to the left edge of the flat enclosure D. A fifth vertical plate K is also vertically welded between the bottom plate A and the cover plate B. The outer vertical edge of the fifth vertical plate K is vertically welded and fixed to the right end of the inner side of the flat enclosure D. A sixth vertical plate L located on the right side of the second opening M is also vertically welded between the bottom plate A and the cover plate B. The vertical edge of the sixth vertical plate L facing the inner cavity of the motor housing is also welded and fixedly connected to the front edge of the right arm of the U-shaped enclosure C. The bottom plate A is also provided with several through holes A-1 surrounding the outer periphery of the central hole. Currently, the motor housing is manufactured using a manual splicing and welding method, where components are assembled and welded simultaneously. Due to the large weight and volume of the carbon steel motor housing, the manual splicing and welding method presents the following technical problems: (1) Poor positioning accuracy of the components and difficulty in controlling the splicing precision result in unstable dimensions of the welded motor housing, making it difficult to meet the drawing requirements for welding precision; (2) High difficulty and low efficiency in positioning and assembling the components, resulting in an overall welding speed that cannot meet the large-volume delivery requirements of the motor housing; (3) During the welding process, welders need to frequently change welding positions and angles, leading to poor weldability and discomfort, which exacerbates the fatigue of welders. Therefore, this utility model proposes a welding fixture for motor housings to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a welding fixture for motor housings. After the components are positioned and assembled on the fixture, welding is performed, significantly improving the accuracy of the assembled components. This ensures that the welded motor housing meets the accuracy requirements of the drawings and guarantees good dimensional consistency. Compared to manual assembly and welding, this significantly improves the assembly efficiency of the components and reduces the error rate, thereby significantly improving the finished product qualification rate and overall welding efficiency of the motor housing, helping to meet the demand for large-volume delivery of motor housings. During the assembly or welding process on the fixture, the rotating platform can be rotated to meet the 360° welding operation requirements of the motor housing, eliminating the need for operators to frequently change operating positions, improving welding accessibility, and significantly reducing the workload and fatigue of operators.

[0005] To achieve the above objectives, the technical solution of this utility model is to design a welding fixture for motor housing, including a workbench, on which a rotating platform is rotatably mounted on the upper surface of the workbench, and a horizontal base plate is detachably mounted on the upper surface of the rotating platform. The upper surface of the horizontal base plate has an annular platform on its inner side and several circumferentially spaced positioning plates fixed on its outer side. The annular platform is adapted to the central hole on the bottom plate of the motor housing, and the several positioning plates and the upper surface of the horizontal base plate form an upward-opening motor housing receiving cavity.

[0006] The upper surface of the horizontal base plate is also covered with a pad assembly that is sleeved on the outer periphery of the annular platform. The pad assembly is provided with positioning holes for inserting the vertical plates 1, 2, 3, 4, 5, and 6 on the positioning motor housing.

[0007] It also includes a concentricity positioning component, which includes a support component. The support component has a positioning ring plate 1 at the upper end and a positioning ring plate 2 at the lower end. The positioning ring plate 1 is adapted to the center hole on the cover plate of the motor housing, and the positioning ring plate 2 is adapted to the center hole of the annular platform.

[0008] In use, the base plate on the motor housing is placed at the bottom of the motor housing cavity. The base plate and the pad assembly are respectively fitted onto the outer periphery of the annular platform through the central hole. The pad assembly is placed on the upper surface of the base plate. The U-shaped and straight side plates on the motor housing abut against the inner side of the corresponding positioning plates. The second positioning ring plate on the concentricity positioning assembly is embedded in the central hole of the annular platform. The cover plate of the motor housing is fitted onto the outer periphery of the first positioning ring plate.

[0009] This utility model discloses a welding fixture for motor housings. After the components are positioned and assembled on the fixture, they are welded, significantly improving the accuracy of the assembled components. This ensures that the finished motor housing meets the accuracy requirements of the drawings and guarantees good dimensional consistency. Compared to manual assembly and welding, this method greatly improves the assembly efficiency of the components and reduces the error rate, thereby significantly improving the finished product qualification rate and overall welding efficiency of the motor housing, which helps meet the demand for large-volume delivery of motor housings. During the assembly or welding process on the fixture, the rotating platform can be rotated to meet the 360° welding operation requirements of the motor housing, eliminating the need for operators to frequently change operating positions. This provides good welding accessibility and significantly reduces the workload and fatigue of operators.

[0010] A preferred technical solution is that the upper ends of the positioning plates located at the middle left, middle rear, and middle right of the horizontal base plate are respectively equipped with C-shaped clamping assemblies for clamping and connecting the corresponding positioning plates and the U-shaped enclosures of the motor housing together. After the U-shaped enclosures are installed inside the motor housing receiving cavity on the tooling of this utility model, their left, middle, and right positions are clamped and connected to the corresponding positioning plates by the C-shaped clamping assemblies, thereby effectively preventing displacement of the U-shaped enclosures during subsequent splicing or welding, and helping to improve the overall splicing accuracy.

[0011] A further preferred technical solution includes that the inner surfaces of the positioning plates located at the middle left, middle rear, middle right, and front left corners of the horizontal base plate, which abut against the U-shaped panel on the motor housing, are all fixed with pads to limit the distance between the outer surface of the U-shaped panel and the corresponding outer edge of the bottom plate on the motor housing. This ingenious and reasonable structural design ensures the precise positioning of the U-shaped panel within the motor housing cavity during assembly in this utility model's tooling.

[0012] A further preferred technical solution is that the pad assembly includes an annular positioning plate one and an arc-shaped positioning plate two, both of which have a central hole adapted to the annular platform. The annular positioning plate one has a positioning ear plate one on its left front side that abuts against the inner side of the corresponding positioning plate, and a positioning ear plate two on its right front side that abuts against the inner side of the corresponding positioning plate. The annular positioning plate one has a plurality of positioning arms spaced circumferentially on its rear side for abutting against the inner side of the U-shaped enclosure on the motor housing. The positioning ear plate one has a positioning hole one for inserting into the positioning plate one corresponding to the position of the opening one on the left front corner of the positioning motor housing, a positioning hole two for inserting into the positioning plate two on the positioning motor housing, a positioning hole three for inserting into the positioning plate three on the positioning motor housing, and a positioning hole four for inserting into the positioning plate four on the positioning motor housing. The positioning ear plate two has a positioning hole five for inserting into the positioning plate five on the positioning motor housing and a positioning hole six for inserting into the positioning plate six on the positioning motor housing.

[0013] The arc-shaped positioning plate II has an opening facing the right front corner of the motor housing. Several notches / grooves are spaced at intervals along the outer periphery of the arc-shaped positioning plate II for inserting into and positioning the upright plate I on the motor housing. The pad assembly has a clever and reasonable structural design; the lower ends of each upright plate can be inserted into the corresponding positioning holes on the pad assembly, making it simple to operate and highly practical.

[0014] A further preferred technical solution includes a plurality of circumferentially spaced mounting holes 1 on the annular positioning plate 1, and a plurality of circumferentially spaced mounting holes 2 on the arc-shaped positioning plate 2. The mounting holes 1 and 2 correspond one-to-one, and the annular positioning plate 1 and the arc-shaped positioning plate 2 are connected together by pins passing through the corresponding mounting holes 1 and 2. This connection effectively prevents relative displacement between the two during subsequent operations, helping to improve the splicing accuracy between the uprights, the base plate, and the surrounding panels.

[0015] A further preferred technical solution includes horizontal circular plates located at the center of the inner sides of the first and second positioning ring plates. The first positioning ring plate and the horizontal circular plates within it, as well as the second positioning ring plate and the horizontal circular plates within it, are fixedly connected by several circumferentially spaced supports. Corresponding supports on the upper and lower sides are fixedly connected by columns. The horizontal circular plates inside the first and second positioning ring plates, along with the columns, constitute the support assembly. Each horizontal circular plate has a through-hole at its center, and the upper surface of the horizontal base plate has a column at the center of the annular platform. In use, the concentricity positioning assembly is fitted onto the column through the through-holes on the upper and lower horizontal circular plates. The concentricity positioning assembly has a clever and reasonable structural design, and its installation and disassembly on the upper surface of the horizontal base plate are simple, which helps improve the overall efficiency of assembling the cover plate and other components into a motor housing.

[0016] A further preferred technical solution includes a front-extending ear plate fixed to the middle of the outer side of a positioning plate located at the left front corner of the horizontal base plate, which abuts against the front end of the left arm of the U-shaped enclosure on the motor housing. The front end of the right edge of the ear plate has an insertion groove corresponding to the second positioning hole, and this insertion groove is adapted to the second positioning plate on the motor housing. The insertion groove on the ear plate positions and restrains the middle of the second positioning plate, thereby helping to ensure the stability of the second positioning plate when inserted into the second positioning hole.

[0017] A further preferred technical solution is that positioning hole two and positioning hole six are both notches with openings facing the rear side, positioning hole five is a notch with openings facing the front side, and the opening of notch one is radially oriented towards the outer periphery of the arc-shaped positioning plate two.

[0018] Welding grooves are provided on the bottom side edge of notch one, the bottom side edge of positioning hole six, the inner periphery of positioning hole one, the inner periphery of positioning hole three, the inner periphery of positioning hole four, and the inner periphery of positioning hole five. The structure of each positioning hole is ingeniously and reasonably designed and equipped with welding grooves, thereby ensuring good operability when spot welding the joints between each upright plate and the base plate or surrounding plate.

[0019] A further preferred technical solution includes a workbench with several legs on its lower end face, a rotating platform with several threaded holes spaced apart on its upper end face, and a horizontal base plate with through-hole mounting holes. The horizontal base plate is fixedly connected to the corresponding threaded holes on the upper end face of the rotating platform via screws inserted into the mounting holes. A drive motor for rotating the rotating platform is installed on the lower end face of the workbench. The method of fixing or disassembling the horizontal base plate on the upper end face of the rotating platform is simple, thus ensuring flexible switching between spot welding and solid welding processes during the motor housing welding process. Driving the rotating platform to rotate via the drive motor satisfies both spot welding and solid welding operations for a full 360° rotation of the motor housing, significantly reducing manual labor and saving labor costs.

[0020] A further preferred technical solution includes several "7"-shaped pressure plates, wherein the horizontal arm plates of the "7"-shaped pressure plates have oblong holes along their length. During the tight welding process, the horizontal base plate is removed from the rotating platform, and the intermediate motor housing, formed by spot welding of the various components, is placed on the rotating platform. The outer periphery of the base plate is then fixedly connected to the rotating platform using several "7"-shaped pressure plates and locking screws, allowing for subsequent tight welding. This method is simple to operate and highly practical.

[0021] The advantages and beneficial effects of this utility model are as follows:

[0022] 1. This utility model provides a welding fixture for motor housings. After the components are positioned and assembled on the fixture, welding is performed, significantly improving the accuracy of the assembled components. This ensures that the welded motor housing meets the accuracy requirements of the drawings and guarantees good dimensional consistency. Compared to manual assembly and welding, this method greatly improves the assembly efficiency of the components and reduces the error rate, thereby significantly improving the finished product qualification rate and overall welding efficiency of the motor housing, helping to meet the demand for large-volume delivery of motor housings. During the assembly or welding process on the fixture, the rotating platform can be rotated to meet the 360° welding operation requirements of the motor housing, eliminating the need for operators to frequently change operating positions. This provides good welding accessibility and significantly reduces the workload and fatigue of operators.

[0023] 2. C-shaped clamping assemblies are respectively installed on the upper ends of the positioning uprights located at the middle left, middle rear, and middle right of the horizontal base plate to clamp and connect the corresponding positioning uprights and the U-shaped enclosures of the motor housing together. After the U-shaped enclosures are installed inside the motor housing receiving cavity on the tooling of this utility model, their left, middle, and right positions are clamped and connected to the corresponding positioning uprights by the C-shaped clamping assemblies, thereby effectively preventing the displacement of the U-shaped enclosures during subsequent splicing or welding, which helps to improve the overall splicing accuracy.

[0024] 3. The ring positioning plate one and the arc positioning plate two are connected together by pins that pass through the corresponding mounting holes one and two, which effectively prevents relative displacement between the two during subsequent operations and helps to improve the splicing accuracy between each upright plate and the base plate and the surrounding plate.

[0025] 4. The concentricity positioning component has a clever and reasonable structural design, and the installation or disassembly method on the upper surface of the horizontal base plate is simple, which helps to improve the overall efficiency of splicing the various parts of the cover plate into the motor housing.

[0026] 5. The insertion slot on the ear plate plays a role in positioning and restraining the middle part of the second upright plate, thereby helping to ensure the stability of the second upright plate when it is inserted into the second positioning hole.

[0027] 6. The horizontal base plate is easy to fix or disassemble on the upper surface of the rotating platform, thus ensuring that the welding process of the motor housing can be flexibly switched between splicing spot welding and dense welding. The rotating platform is driven by a drive motor to meet the splicing spot welding and dense welding operations of the motor housing in one 360° circle, which helps to significantly reduce manual labor and save labor costs.

[0028] 7. It also includes several "7"-shaped pressure plates, each with a waist-shaped hole along its length on its horizontal arm plate. During the tight welding process, the horizontal base plate is removed from the rotating platform, and the intermediate motor housing formed by spot welding of various components is placed on the rotating platform. The outer periphery of the base plate is fixedly connected to the rotating platform by several "7"-shaped pressure plates and locking screws, allowing subsequent tight welding to proceed. The operation is simple and practical. Attached Figure Description

[0029] Figure 1 This is a front-view 3D view of the motor housing;

[0030] Figure 2 This is a three-dimensional view of the motor housing from the right side.

[0031] Figure 3 This is a perspective view of a welding fixture for motor housing according to the present invention.

[0032] Figure 4This is an exploded view of a welding fixture for a motor housing according to the present invention;

[0033] Figure 5 It is an assembly diagram of the rotary platform on the worktable;

[0034] Figure 6 This is a diagram showing the split relationship of the C-clamp assembly on the horizontal substrate;

[0035] Figure 7 This is a front-view 3D view of the ring-shaped positioning plate.

[0036] Figure 8 This is a front-view 3D view of the second arc-shaped positioning plate;

[0037] Figure 9 This is a front-view stereoscopic view of the concentricity positioning component;

[0038] Figure 10 This is one of the usage diagrams of a welding fixture for motor housing according to this utility model;

[0039] Figure 11 This is the second diagram showing the usage state of a welding fixture for a motor housing according to this utility model;

[0040] Figure 12 This is the third diagram showing the usage state of a welding fixture for a motor housing according to this utility model;

[0041] Figure 13 This is the fourth diagram showing the usage state of a welding fixture for motor housing according to this utility model;

[0042] Figure 14 This is the fifth diagram showing the usage state of a welding fixture for motor housing according to this utility model.

[0043] In the diagram: A. Base plate; B. Cover plate; C. U-shaped enclosure; D. Straight enclosure; E. Vertical plate one; F. Opening one; G. Vertical plate two; H. Vertical plate three; J. Vertical plate four; K. Vertical plate five; L. Vertical plate six; M. Opening two; A-1. Through hole one; 1. Workbench; 2. Rotating platform; 3. Horizontal base plate; 4. Annular positioning plate one; 5. Arc-shaped positioning plate two; 6. Concentricity positioning assembly; 7. Pin; 8. C-type clamp assembly; 9. Drive motor; 10. Screw; 11. Welding groove; 12. "7" shaped pressure plate; 1-1. Support leg; 2-1. Threaded hole; 3-1. Column one; 3-2. Annular platform; 3-3. Positioning vertical plate; 3-4. Pad Block; 3-5, Ear plate; 3-5a, Insertion slot; 4-1, Positioning ear plate one; 4-2, Positioning ear plate two; 4-3, Positioning arm; 4-4, Positioning hole one; 4-5, Positioning hole two; 4-6, Positioning hole three; 4-7, Positioning hole four; 4-8, Positioning hole five; 4-9, Positioning hole six; 4-10, Mounting hole one; 5-1, Notch groove one; 5-2, Mounting hole two; 6-1, Positioning ring plate one; 6-2, Positioning ring plate two; 6-3, Support assembly; 6-3a, Horizontal circular plate; 6-3b, Support arm; 6-3c, Column two; 6-3d, Through hole two; 8-1, N-shaped clamp; 8-2, Locking screw; 12-1, Waist-shaped hole. Detailed Implementation

[0044] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0045] Example

[0046] like Figures 3-9 As shown in Figure 14, this utility model is a welding fixture for motor housing, including a workbench 1. A rotating platform 2 is rotatably mounted on the upper surface of the workbench 1. A horizontal base plate 3 is detachably mounted on the upper surface of the rotating platform 2. The upper surface of the horizontal base plate 3 has an annular platform 3-2 on the inner side and several circumferentially spaced positioning plates 3-3 fixed on the outer side. The annular platform 3-2 is adapted to the central hole on the bottom plate A of the motor housing. The several positioning plates 3-3 and the upper surface of the horizontal base plate 3 form an upward-opening motor housing receiving cavity.

[0047] The upper surface of the horizontal base plate 3 is also covered with a pad assembly that is sleeved on the outer periphery of the annular platform 3-2. The pad assembly is provided with positioning holes for inserting the vertical plates E, G, H, J, K, and L on the positioning motor housing.

[0048] It also includes a concentricity positioning component 6, which includes a support component 6-3. The support component 6-3 has a positioning ring plate 6-1 at the upper end and a positioning ring plate 6-2 at the lower end. The positioning ring plate 6-1 is adapted to the center hole on the cover plate B of the motor housing, and the positioning ring plate 6-2 is adapted to the center hole of the annular platform 3-2.

[0049] In use, the base plate A on the motor housing is placed at the bottom of the motor housing cavity. The base plate A and the pad assembly are respectively fitted onto the outer periphery of the annular platform 3-2 through the central hole, and the pad assembly is placed on the upper surface of the base plate A. The U-shaped enclosure C and the straight enclosure D on the motor housing abut against the inner side of the corresponding positioning plate 3-3. The positioning ring plate 6-2 on the concentricity positioning assembly 6 is embedded in the central hole of the annular platform 3-2. The cover plate B of the motor housing is fitted onto the outer periphery of the positioning ring plate 6-1.

[0050] Preferably, C-shaped clamping assemblies 8 are respectively installed on the upper ends of the positioning plates 3-3 located at the middle left side, middle rear side, and middle right side of the horizontal base plate 3, for clamping and connecting the corresponding positioning plates 3-3 and the U-shaped enclosure plates C of the motor housing together. Specifically, the C-shaped clamping assembly 8 includes an n-shaped clamping body 8-1, and a threaded hole penetrating the plate is opened on one side arm plate of the n-shaped clamping body 8-1, and a locking screw 8-2 passes through the threaded hole.

[0051] More preferably, the positioning plates 3-3 located at the middle left side, middle rear side, middle right side, and left front corner of the horizontal base plate 3, which abut against the U-shaped enclosure C on the motor housing, are all fixed with pads 3-4 for limiting the distance between the outer side of the U-shaped enclosure C and the corresponding outer edge of the bottom plate A on the motor housing.

[0052] More preferably, the pad assembly includes an annular positioning plate 4 and an arc-shaped positioning plate 5, both having a central hole adapted to the annular platform 3-2. The annular positioning plate 4 has a positioning ear plate 4-1 on its left front side that abuts against the inner side of the corresponding positioning plate 3-3, and a positioning ear plate 4-2 on its right front side that abuts against the inner side of the corresponding positioning plate 3-3. The rear side of the annular positioning plate 4 is circumferentially provided with several positioning arms 4-3 for abutting against the inner side of the U-shaped enclosure C on the motor housing. The positioning ear plate 4-1 is provided with positioning hole 4-4 for inserting the vertical plate 1E corresponding to the position of opening 1F on the left front corner of the positioning motor housing, positioning hole 4-5 for inserting the upper vertical plate 2G of the positioning motor housing, positioning hole 4-6 for inserting the upper vertical plate 3H of the positioning motor housing, and positioning hole 4-7 for inserting the upper vertical plate 4J of the positioning motor housing. The positioning ear plate 4-2 is provided with positioning hole 4-8 for inserting the upper vertical plate 5K of the positioning motor housing and positioning hole 4-9 for inserting the upper vertical plate 6L of the positioning motor housing.

[0053] The arc-shaped positioning plate 25 has an opening facing the right front corner of the motor housing, and the outer periphery of the arc-shaped positioning plate 25 is provided with several notches 5-1 for inserting and positioning the upright plate 1E on the motor housing.

[0054] More preferably, the annular positioning plate 4 is provided with a plurality of mounting holes 4-10 spaced apart in a circumferential direction, and the arc-shaped positioning plate 5 is provided with a plurality of mounting holes 5-2 spaced apart in a circumferential direction. The mounting holes 4-10 and 5-2 correspond one-to-one, and the annular positioning plate 4 and the arc-shaped positioning plate 5 are connected together by pins 7 passing through the corresponding mounting holes 4-10 and 5-2.

[0055] More preferably, the inner sides of the first positioning ring plate 6-1 and the second positioning ring plate 6-2 are respectively provided with horizontal circular plates 6-3a located at the center position, and the first positioning ring plate 6-1 and the horizontal circular plates 6-3a located inside it, as well as the second positioning ring plate 6-2 and the horizontal circular plates 6-3a located inside it, are fixedly connected together by a plurality of circumferentially spaced support arms 6-3b, and the corresponding support arms 6-3b on the upper and lower sides are fixedly connected together by columns 6-3c. The horizontal circular plate 6-3a on the inner side of the 1, the horizontal circular plate 6-3a located inside the positioning ring plate 6-2, and the column 6-3c constitute the support component 6-3. The horizontal circular plate 6-3a has a through hole 6-3d in the center of the plate body. The upper end face of the horizontal base plate 3 has a column 3-1 located at the center of the annular platform 3-2. In use, the concentricity positioning component 6 is sleeved and installed on the column 3-1 through the through holes 6-3d on the upper and lower horizontal circular plates 6-3a.

[0056] More preferably, a forward-extending ear plate 3-5 is fixed to the middle of the outer side of the positioning plate 3-3 located at the left front corner of the horizontal base plate 3, which abuts against the front end of the left arm of the U-shaped enclosure plate C on the motor housing. The front end of the right edge of the ear plate 3-5 has an insertion groove 3-5a corresponding to the positioning hole 4-5, and the insertion groove 3-5a is adapted to the upright plate G on the motor housing.

[0057] More preferably, the positioning holes 4-5 and 4-9 are both notches with their openings facing the rear, and the positioning hole 4-8 is a notch with its opening facing the front. The opening of the notch 5-1 is radially oriented toward the outer periphery of the arc-shaped positioning plate 5. Welding grooves 11 are provided on the bottom edge of the notch 5-1, the bottom edge of the positioning hole 4-9, the inner periphery of the positioning hole 4-4, the inner periphery of the positioning hole 4-6, the inner periphery of the positioning hole 4-7, and the inner periphery of the positioning hole 4-8.

[0058] More preferably, the lower end face of the workbench 1 has a plurality of legs 1-1, the upper end face of the rotating platform 2 is provided with a plurality of threaded holes 2-1 spaced apart, the horizontal base plate 3 is provided with a through mounting hole, the horizontal base plate 3 is fixedly connected to the corresponding threaded hole 2-1 on the upper end face of the rotating platform 2 by screws 10 passing through the mounting hole, and the lower end face of the workbench 1 is equipped with a drive motor 9 for driving the rotating platform 2 to rotate.

[0059] More preferably, it also includes a plurality of “7”-shaped pressure plates 12, wherein the horizontal arm plate of the “7”-shaped pressure plate 12 is provided with an oblong hole 12-1 along the length direction.

[0060] The working principle of the welding fixture for motor housing of this utility model is as follows:

[0061] Remove the three C-clamp assemblies 8, the pad assembly, and the concentricity positioning assembly 6 from the horizontal base plate 3. Place the base plate A on the bottom of the motor housing cavity on the upper surface of the horizontal base plate 3 (see attached). Figure 10 Place the U-shaped baffle C on the rear side of the motor housing cavity and the straight baffle D on the right front corner of the motor housing cavity, making them abut against the inner side of the corresponding positioning plate 3-3. Then, re-clamp the three C-shaped clamping assemblies 8 onto the corresponding positioning plate 3-3 and the U-shaped baffle C, with the n-shaped clamping body 8-1 snapping onto the corresponding positioning plate 3-3, pad 3-4, and U-shaped baffle C from top to bottom. Then, use the locking screw 8-2 to clamp and connect the positioning plate 3-3, pad 3-4, and U-shaped baffle C together, with the locking screw 8-2 located on the outside of the motor housing cavity (see Appendix). Figure 11Place the annular positioning plate 4 and the arc-shaped positioning plate 5 of the pad assembly on the upper surface of the base plate A and fit them onto the outer periphery of the annular platform 3-2. Then, insert the vertical plates E, G, H, J, K, and L into the corresponding positioning holes. The middle part of the vertical plate G is also inserted into the insertion groove 3-5a on the ear plate 3-5 (see Appendix). Figure 12 The lower ends of each upright plate are spot-welded to the base plate A. Upright plate G is spot-welded to the front end of the left arm of the U-shaped enclosure C. Upright plate H is spot-welded to the corresponding upright plate E. Upright plate J is spot-welded to the left end of the flat enclosure D. Upright plate K is spot-welded to the inner side of the flat enclosure D. Upright plate L is spot-welded to the front end of the right arm of the U-shaped enclosure C. During the welding process, the drive motor 9 can be continuously activated by the control system to rotate the rotating platform 2 to a suitable welding position to meet the welding requirements of different angles and positions. The three C-shaped plates are... Disassemble the clamping assembly 8 and the pad assembly. Install the concentricity positioning assembly 6 onto the column 3-1 on the upper surface of the horizontal base plate 3 through the through holes 6-3d on the upper and lower horizontal circular plates 6-3a. Then, place the cover plate B on the upper surface of the U-shaped enclosure C and the straight enclosure D, and fit the cover plate B onto the outer periphery of the positioning ring plate 6-1. Adjust the corresponding positions of the outer periphery of the cover plate B so that its two straight edges abut against the inner surface of the positioning plate 3-3 located on the front side of the horizontal base plate 3. Spot weld the cover plate B to the U-shaped enclosure C, the straight enclosure D, and the corresponding uprights to form the intermediate body of the motor housing (see Appendix). Figure 13 During the welding process, the control system can continuously activate the drive motor 9 to rotate the rotating platform 2 to a suitable welding position to meet the welding requirements of different angles and positions. The motor housing intermediate body, concentricity positioning component 6, and horizontal base plate 3 are removed from the rotating platform 2. The motor housing intermediate body is then placed on the rotating platform 2. Several "7"-shaped pressure plates 12 are circumferentially spaced on the outer periphery of the base plate A of the motor housing intermediate body, and one end of the horizontal arm plate of the "7"-shaped pressure plate 12 is pressed against the outer periphery of the base plate A. Locking screws are threaded through the waist-shaped holes 12-1 on the horizontal arm plate from top to bottom to be screwed and fixed together with the corresponding threaded holes 2-1 on the rotating platform 2. Subsequent tight welding operations are then performed on the motor housing intermediate body. During the welding process, the control system can continuously activate the drive motor 9 to rotate the rotating platform 2 to a suitable welding position to meet the welding requirements of different angles and positions, thereby reducing the fatigue caused by frequent movement of the welding personnel (see Appendix). Figure 14 Alternatively, the middle part of the motor housing can be flipped up and down so that the cover plate B is on the lower side for tight welding between each vertical plate and the cover plate B.

[0062] This utility model discloses a welding fixture for motor housings. After the components are positioned and assembled on the fixture, they are welded, significantly improving the accuracy of the assembled components. This ensures that the finished motor housing meets the accuracy requirements of the drawings and guarantees good dimensional consistency. Compared to manual assembly and welding, this method greatly improves the assembly efficiency of the components and reduces the error rate, thereby significantly improving the finished product qualification rate and overall welding efficiency of the motor housing, which helps meet the demand for large-volume delivery of motor housings. During the assembly or welding process on the fixture, the rotating platform can be rotated to meet the 360° welding operation requirements of the motor housing, eliminating the need for operators to frequently change operating positions. This provides good welding accessibility and significantly reduces the workload and fatigue of operators.

[0063] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A welding fixture for an electric motor housing, characterized in that, The device includes a workbench (1), on which a rotating platform (2) is rotatably mounted. A horizontal base plate (3) is detachably mounted on the upper surface of the rotating platform (2). The upper surface of the horizontal base plate (3) has an annular platform (3-2) on its inner side and several circumferentially spaced positioning plates (3-3) fixed on its outer side. The annular platform (3-2) is adapted to the center hole on the bottom plate (A) of the motor housing. The several positioning plates (3-3) and the upper surface of the horizontal base plate (3) form an upward-opening motor housing receiving cavity. The upper surface of the horizontal base plate (3) is also covered with a pad assembly that is sleeved on the outer periphery of the annular platform (3-2). The pad assembly is provided with positioning holes for inserting the vertical plates one (E), two (G), three (H), four (J), five (K), and six (L) on the positioning motor housing. It also includes a concentricity positioning component (6), which includes a support component (6-3). The support component (6-3) has a positioning ring plate one (6-1) at the upper end and a positioning ring plate two (6-2) at the lower end. The positioning ring plate one (6-1) is adapted to the center hole on the cover plate (B) of the motor housing, and the positioning ring plate two (6-2) is adapted to the center hole of the annular platform (3-2). In use, the base plate (A) on the motor housing is placed at the bottom of the motor housing cavity. The base plate (A) and the pad assembly are respectively fitted onto the outer periphery of the annular platform (3-2) through the central hole. The pad assembly is placed on the upper surface of the base plate (A). The U-shaped enclosure (C) and the straight enclosure (D) on the motor housing abut against the inner side of the corresponding positioning plate (3-3). The second positioning ring plate (6-2) on the concentricity positioning assembly (6) is embedded in the central hole of the annular platform (3-2). The cover plate (B) of the motor housing is fitted onto the outer periphery of the first positioning ring plate (6-1).

2. The welding fixture for a motor housing as described in claim 1, characterized in that, C-shaped clamping assemblies (8) are respectively installed on the upper ends of the positioning plates (3-3) located at the middle left side, middle rear side and middle right side of the horizontal base plate (3) to clamp and connect the corresponding positioning plates (3-3) and the U-shaped enclosure (C) of the motor housing together.

3. The welding fixture for a motor housing as described in claim 2, characterized in that, On the inner side of the positioning plate (3-3) located at the middle left side, middle rear side, middle right side and left front corner of the horizontal base plate (3) that abuts against the U-shaped enclosure (C) on the motor housing, pads (3-4) are fixed to limit the distance between the outer side of the U-shaped enclosure (C) and the corresponding outer edge of the bottom plate (A) on the motor housing.

4. The welding fixture for a motor housing as described in claim 3, characterized in that, The pad assembly includes an annular positioning plate one (4) and an arc-shaped positioning plate two (5), both of which have a central hole adapted to the annular platform (3-2). The annular positioning plate one (4) has a positioning ear plate one (4-1) on its left front side that abuts against the inner side of the corresponding positioning upright plate (3-3), and a positioning ear plate two (4-2) on its right front side that abuts against the inner side of the corresponding positioning upright plate (3-3). The rear side of the annular positioning plate one (4) is provided with a plurality of positioning arms (4-3) spaced circumferentially for abutting against the inner side of the U-shaped enclosure (C) on the motor housing. The positioning ear plate one (4-1) is provided with a positioning hole 1 (4-4) for inserting the positioning motor housing, the left front corner of the positioning motor housing, the corresponding position of the upright plate 1 (E), the positioning hole 2 (4-5) for inserting the positioning motor housing, the positioning hole 3 (4-6) for inserting the positioning motor housing, the positioning hole 4 (4-7) for inserting the positioning motor housing, the positioning ear plate 2 (4-2) is provided with a positioning hole 5 (4-8) for inserting the positioning motor housing, the positioning motor housing, the positioning ear plate 5 (K) and the positioning hole 6 (4-9) for inserting the positioning motor housing, the positioning ear plate 2 (4-2) is provided with a positioning hole 5 (4-8) for inserting the positioning motor housing, the positioning motor housing, the positioning motor housing, the positioning ear plate 6 (L) and the positioning ear plate 6 (4-9). The arc-shaped positioning plate 2 (5) has an opening facing the right front corner of the motor housing, and the outer periphery of the arc-shaped positioning plate 2 (5) is provided with several notches (5-1) for inserting and positioning the upright plate 1 (E) on the motor housing.

5. The welding fixture for a motor housing as described in claim 4, characterized in that, The annular positioning plate (4) is provided with a plurality of mounting holes (4-10) spaced apart in a circumferential direction, and the arc-shaped positioning plate (5) is provided with a plurality of mounting holes (5-2) spaced apart in a circumferential direction. The mounting holes (4-10) and the mounting holes (5-2) correspond one to one. The annular positioning plate (4) and the arc-shaped positioning plate (5) are connected together by pins (7) that pass through the corresponding mounting holes (4-10) and mounting holes (5-2).

6. The welding fixture for a motor housing as described in claim 5, characterized in that, The inner sides of positioning ring plate one (6-1) and positioning ring plate two (6-2) are respectively provided with horizontal circular plates (6-3a) located at the center. Positioning ring plate one (6-1) and the horizontal circular plate (6-3a) located inside it, as well as positioning ring plate two (6-2) and the horizontal circular plate (6-3a) located inside it, are fixedly connected together by a number of circumferentially spaced support arms (6-3b). The corresponding support arms (6-3b) on the upper and lower sides are fixedly connected together by column two (6-3c). The horizontal circular plate located inside positioning ring plate one (6-1) is... The support assembly (6-3) consists of a plate (6-3a), a horizontal circular plate (6-3a) located inside the positioning ring plate (6-2), and a column (6-3c). The horizontal circular plate (6-3a) has a through hole (6-3d) at its center. The upper surface of the horizontal base plate (3) has a column (3-1) located at the center of the annular platform (3-2). In use, the concentricity positioning assembly (6) is fitted onto the column (3-1) through the through hole (6-3d) on the upper and lower horizontal circular plates (6-3a).

7. The welding fixture for a motor housing as described in claim 6, characterized in that, A forward-extending ear plate (3-5) is fixed on the middle of the outer side of the positioning plate (3-3) located at the left front corner of the horizontal base plate (3) for abutting against the front end of the left arm of the U-shaped enclosure (C) on the motor housing. The front end of the right edge of the ear plate (3-5) has an insertion groove (3-5a) corresponding to the positioning hole (4-5), and the insertion groove (3-5a) is adapted to the upright plate (G) on the motor housing.

8. The welding fixture for a motor housing as described in claim 7, characterized in that, The positioning holes 2 (4-5) and 6 (4-9) are notches with openings facing the rear side, the positioning hole 5 (4-8) is a notch with openings facing the front side, and the opening of notch 1 (5-1) is radially oriented toward the outer periphery of the arc-shaped positioning plate 2 (5). Welding grooves (11) are provided on the bottom side edge of notch one (5-1), the bottom side edge of positioning hole six (4-9), the inner periphery of positioning hole one (4-4), the inner periphery of positioning hole three (4-6), the inner periphery of positioning hole four (4-7), and the inner periphery of positioning hole five (4-8).

9. The welding fixture for a motor housing as described in any one of claims 1 to 8, characterized in that, The workbench (1) has several legs (1-1) on its lower end face. The rotating platform (2) has several threaded holes (2-1) spaced apart on its upper end face. The horizontal base plate (3) has mounting holes that penetrate the plate body. The horizontal base plate (3) is fixedly connected to the threaded holes (2-1) on the upper end face of the rotating platform (2) by screws (10) that pass through the mounting holes. The workbench (1) has a drive motor (9) installed on its lower end face to drive the rotating platform (2) to rotate.

10. The welding fixture for a motor housing as described in claim 9, characterized in that, It also includes several "7"-shaped pressure plates (12), and the horizontal arm plate of the "7"-shaped pressure plate (12) has a waist-shaped hole (12-1) along the length direction.

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