High-positioning-precision welding clamp convenient to remodel

Abstract

A high-positioning-precision welding fixture convenient to remodel comprises a base, a bottom plate, a guide plate and a positioning block, the base is arranged on the upper surface of the bottom plate, the guide plate is installed on the left side of the upper surface of the bottom plate, the positioning block is installed on the side face above the guide plate, and the positioning plate is arranged on the right side face of the positioning block; the positioning plate comprises a first positioning plate and a second positioning plate, a fixed distance is formed between the first positioning plate and the second positioning plate, and a three-phase positioning hole is formed in the first positioning plate; a limiting block is fixedly installed on the edge of the base, and a limiting protruding point is arranged on the inner side face of the limiting block and matched with a groove in the side face of the armature iron core. The welding fixture overcomes the defects in the prior art, and can effectively solve the problems that BUSBAR heights of iron core products of different batches have deviation due to the fact that an existing welding fixture adopts a fixed height positioning mode, the BUSBAR heights exceed a normal range seriously, and the risk of reworking and scrapping is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, in particular to a motor manufacturing tool, and specifically to a high positioning precision welding fixture which is easy to change. Background Art

[0002] New energy is experiencing explosive growth and has become the most promising industry. New energy motors are widely used in the fields of automobiles, aerospace, industrial machinery, etc. In recent years, the iteration speed of new energy technology has accelerated, and 400V motors and 800V motors have become the mainstream products. While pursuing motor performance, domestic manufacturers have increasingly stringent quality requirements for motors. BUSBAR copper bar welding of flat wire motors is a key process in motor manufacturing, and the accuracy of BUSBAR positioning is related to the installation between the motor and the housing.

[0003] The existing welding fixture adopts a fixed height positioning method, and the height between the BUSBAR and the base in the theoretical state is designed in advance, but the error caused by the change of the core height is ignored, resulting in the BUSBAR height deviation of products of different batches of cores, which may seriously exceed the normal range, increasing the risk of rework and scrap. At the same time, the current welding fixture is troublesome to change, has poor versatility, and the cost of change is high. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a high positioning precision welding fixture which is easy to change, overcomes the shortcomings of the prior art, and can effectively solve the problem that the existing welding fixture adopts a fixed height positioning method, resulting in deviations in the BUSBAR heights of products of different batches of iron cores, which may seriously exceed the normal range and increase the risk of rework and scrapping.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A high positioning precision welding fixture that is easy to change, comprising a base, a bottom plate, a guide plate and a positioning block, wherein the base is arranged on the upper surface of the bottom plate, the guide plate is arranged on the left side of the upper surface of the bottom plate, the positioning block is arranged on the upper side of the guide plate, and the positioning plate is arranged on the right side of the positioning block;

[0007] The positioning plate comprises a first positioning plate and a second positioning plate, wherein the first positioning plate is located above the second positioning plate, a fixed distance is provided between the first positioning plate and the second positioning plate, and a three-phase positioning hole is provided on the first positioning plate.

[0008] Preferably, a hollow groove is provided at the center of the base, a limit block is fixedly installed on the edge of the base, a limit convex point is provided on the inner side of the limit block, and the limit convex point cooperates with the groove on the side of the armature core.

[0009] Preferably, an installation groove is formed on the upper surface of the bottom plate, and the base is fixedly installed in the installation groove.

[0010] Preferably, at least two U-shaped notches are formed on the side surface of the base, and the U-shaped notches are symmetrically arranged about the center.

[0011] Preferably, an arc-shaped limiting projection strip is arranged on the upper surface of the base.

[0012] Preferably, a limiting plate is arranged on the left side above the guide plate, limiting strips are arranged at the front and rear ends on the right side above the guide plate, a limiting groove is formed between the limiting plate and the limiting strips, the positioning block is movably installed in the limiting groove, and the positioning plate passes through between the two limiting strips.

[0013] Preferably, a positioning pin is arranged in the middle of the upper surface of the guide plate, a positioning through hole is formed in the positioning block in the vertical direction, and the positioning block is fixed in the limiting groove by the cooperation of the positioning through hole and the positioning pin.

[0014] Preferably, a locking bolt is connected to the back surface of the limiting plate by threads, and the threaded end of the locking bolt passes through the limiting plate and abuts against the inner side surface of the positioning block.

[0015] Preferably, weight-removing openings are formed on both the first positioning plate and the second positioning plate.

[0016] Preferably, a plurality of feet are installed at the bottom of the bottom plate.

[0017] The utility model provides a high-positioning-precision welding fixture which is convenient for model change. The following beneficial effects are achieved: by arranging the limiting block, the rotation and movement of the iron core on the base are prevented, the positioning precision is improved, and the arrangement of the U-shaped notch not only reduces the weight of the fixture, but also facilitates the loading and unloading of the armature. By arranging the positioning block and arranging the first positioning plate and the second positioning plate on the side surface of the positioning block, the height of the BUSBAR copper row is controlled by the distance between the positioning plates, the precision is high and is not affected by the height of the armature iron core, and at the same time, by replacing the positioning mechanism, the model can be changed quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the prior art.

[0019] Figure 1 Structural schematic diagram of the utility model;

[0020] Figure 2 Structural schematic diagram of the base in the utility model;

[0021] Figure 3Schematic diagram of the partial structure above the guide plate in the present utility model;

[0022] Description of the reference numerals in the figure:

[0023] 1. Base; 2. Bottom plate; 3. Guide plate; 4. Positioning block; 5. Positioning pin; 6. Positioning plate; 7. Hollow groove; 8. Limiting block; 9. U-shaped notch; 10. Arc-shaped limiting protrusion strip; 11. Foot; 12. Locking bolt; 31. Limiting plate; 32. Limiting strip; 61. First positioning plate; 62. Second positioning plate; 63. Three-phase positioning hole; 64. Removal of weight opening; 81. Limiting convex point. Specific implementation mode

[0024] To make the purpose, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the present utility model.

[0025] Example 1, as Figures 1 to 3 shown, a high-positioning-accuracy welding fixture convenient for model change includes a base 1, a bottom plate 2, a guide plate 3 and a positioning block 4. The base 1 is arranged on the upper surface of the bottom plate 2. The guide plate 3 is installed on the left side of the upper surface of the bottom plate 2. A positioning block 4 is installed on the upper side surface of the guide plate 3. A positioning plate 6 is arranged on the right side surface of the positioning block 4;

[0026] The positioning plate 6 includes a first positioning plate 61 and a second positioning plate 62. The first positioning plate 61 is located above the second positioning plate 62. There is a fixed distance between the first positioning plate 61 and the second positioning plate 62. A three-phase positioning hole 63 is opened on the first positioning plate 61.

[0027] Among them, a hollow groove 7 is opened in the center of the base 1. A limiting block 8 is fixedly installed on the edge position of the base 1 through bolts. A limiting convex point 81 is arranged on the inner side surface of the limiting block 8. The limiting convex point 81 cooperates with the groove on the side surface of the armature core. The height of the base 1 is greater than the height of the armature welding end.

[0028] Among them, an arc-shaped limiting protrusion strip 10 is arranged on the upper surface of the base 1. The arc-shaped limiting protrusion strip 10 and the base 1 can adopt an integral design or can be fixedly connected by bolts.

[0029] Working principle:

[0030] When in use, first carry the armature to the tooling so that the lower end surface of the armature core contacts the base 1. In this embodiment, the arc-shaped limiting protrusion strip 10 on the base 1 can be made to contact the side surface of the armature core to effectively prevent the armature core from moving radially. In addition, by installing a limiting block 8 on the side position of the base 1 and making the limiting convex point 81 on the side surface of the limiting block 8 cooperate with the groove on the side surface of the armature core, the rotational movement of the core can be effectively restricted.

[0031] After placing the armature on the base 1, the position of the positioning block 4 can be adjusted so that the lower end face of the second positioning plate 62 contacts the upper end face of the armature core. Subsequently, the position of the armature core can be completely fixed. Finally, the three-phase holes of the BUSBAR copper bar are aligned with the three-phase positioning holes on the first positioning plate 61 respectively, and then bolted and fixed. In this way, the positions of the armature and the BUSBAR will be completely fixed, and the height of the BUSBAR copper bar is controlled by the distance between the first positioning plate 61 and the second positioning plate 62, with high precision and not affected by the height of the armature core. Thereafter, the welding operation between the BUSBAR and the armature lead wire can be carried out.

[0032] Embodiment 2, as a further preferred solution of Embodiment 1, the bottom plate 2 and the base 1 can adopt an integrated design, or an installation groove can be provided on the upper surface of the bottom plate 2 so that the base 1 is fixedly installed in the installation groove.

[0033] Embodiment 3, as a further preferred solution of Embodiment 1, at least two U-shaped notches 9 are provided on the side surface of the base 1, and the U-shaped notches 9 are arranged in central symmetry. By providing the U-shaped notches 9, the weight of the entire fixture can be effectively reduced, and at the same time, it is convenient for the loading and unloading of the armature.

[0034] Embodiment 4, as a further preferred solution of Embodiment 1, a limiting plate 31 is provided on the upper left side of the guide plate 3, and limiting strips 32 are provided at both the front and rear ends on the upper right side of the guide plate 3. A limiting groove is formed between the limiting plate 31 and the limiting strips 32. A positioning pin 5 is provided in the middle of the upper surface of the guide plate 3. The positioning block 4 is provided with a positioning through hole in the vertical direction, and the positioning block 4 is fixed in the limiting groove by the cooperation of the positioning through hole and the positioning pin 5; the positioning plate 6 passes through between the two limiting strips 32. Among them, the back surface of the limiting plate 31 is threadedly connected with a locking bolt 12, and the threaded end of the locking bolt 12 passes through the limiting plate 31 and abuts against the inner side surface of the positioning block 4.

[0035] Thus, when adjusting the height of the positioning block 4, the positioning block 4 can be moved up and down so that the positioning block 4 moves axially along the positioning pin 5 to make the lower end face of the second positioning plate 62 contact the upper end face of the core. Subsequently, the locking bolt 12 is rotated so that the threaded end of the locking bolt 12 abuts against the positioning block 4, thereby realizing the locking and fixing work of the positioning block 4, effectively reducing the gap between the positioning block 4 and the guide plate 3, preventing the positioning block 4 from moving, and then effectively improving the positioning accuracy. And for different armature cores, the positioning block 4 can be directly taken out upward along the positioning pin 5 to achieve rapid model change.

[0036] Embodiment Five, as a further preferred solution of Embodiment One, weight-removing openings 64 are provided on both the first positioning plate 61 and the second positioning plate 62. By providing the weight-removing openings 64 on the first positioning plate 61 and the second positioning plate 62, the weights of the first positioning plate 61 and the second positioning plate 62 can be effectively reduced.

[0037] Embodiment Six, as a further preferred solution of Embodiment One, a plurality of feet are installed at the bottom of the bottom plate 2. The feet can effectively support and fix the entire welding fixture.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the present invention in each embodiment.

Claims

1. A high positioning precision welding fixture that is easy to change, characterized by: The invention comprises a base (1), a bottom plate (2), a guide plate (3) and a positioning block (4), wherein the base (1) is arranged on the upper surface of the bottom plate (2), the guide plate (3) is installed on the left side of the upper surface of the bottom plate (2), the positioning block (4) is installed on the upper side of the guide plate (3), and the positioning plate (6) is arranged on the right side of the positioning block (4); The positioning plate (6) comprises a first positioning plate (61) and a second positioning plate (62), the first positioning plate (61) being located above the second positioning plate (62), the first positioning plate (61) and the second positioning plate (62) being spaced a fixed distance apart, and the first positioning plate (61) being provided with a three-phase positioning hole (63).

2. The high positioning precision welding fixture that is easy to change according to claim 1 is characterized in that: A hollow groove (7) is provided at the center of the base (1), a limit block (8) is fixedly mounted on the edge of the base (1), a limit convex point (81) is provided on the inner side of the limit block (8), and the limit convex point (81) cooperates with a groove on the side of the armature core.

3. The high positioning precision welding fixture that is easy to change according to claim 1 is characterized in that: The upper surface of the bottom plate (2) is provided with a mounting groove, and the base (1) is fixedly mounted in the mounting groove.

4. The high positioning precision welding fixture that is easy to change according to claim 1 is characterized in that: At least two U-shaped notches (9) are provided on the side surface of the base (1), and the U-shaped notches (9) are arranged in a centrally symmetrical manner.

5. The high positioning precision welding fixture that is easy to change according to claim 1 is characterized in that: The upper surface of the base (1) is provided with an arc-shaped limiting raised strip (10).

6. The high positioning precision welding fixture that is easy to change according to claim 1 is characterized in that: A limiting plate (31) is arranged on the left side above the guide plate (3), and limiting strips (32) are arranged at both the front and rear ends of the right side above the guide plate (3). A limiting groove is formed between the limiting plate (31) and the limiting strips (32), and the positioning block (4) is movably mounted in the limiting groove. The positioning plate (6) passes through between the two limiting strips (32).

7. The high positioning precision welding fixture that is easy to change according to claim 6 is characterized in that: A positioning pin (5) is provided in the middle of the upper surface of the guide plate (3), and a positioning through hole is provided in the positioning block (4) along the vertical direction. The positioning block (4) is installed in the limiting groove through the cooperation between the positioning through hole and the positioning pin (5).

8. The high positioning precision welding fixture that is easy to change according to claim 6 is characterized in that: The back side of the limiting plate (31) is connected to a locking bolt (12) via a thread, and the threaded end of the locking bolt (12) passes through the limiting plate (31) and abuts against the inner side surface of the positioning block (4).

9. The high positioning precision welding fixture that is easy to change according to claim 1 is characterized in that: The first positioning plate (61) and the second positioning plate (62) are both provided with de-weighting openings (64).

10. The high positioning precision welding fixture that is easy to change according to claim 1, characterized in that: A plurality of feet are installed at the bottom of the base plate (2).

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