CN111941077B

CN111941077B - Positioning and clamping device and method

Info

Publication number: CN111941077B
Application number: CN202010987922.1A
Authority: CN
Inventors: 刘蕾; 吴洋; 石爱文; 周闯; 汪波
Original assignee: Anhui Juyi Technology Co Ltd
Current assignee: Anhui Juyi Technology Co Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2022-04-08
Anticipated expiration: 2040-09-18
Also published as: CN111941077A

Abstract

The invention discloses a positioning and clamping device which comprises an upper rotating plate, a lower rotating plate, an upper plate fixing seat connected with the upper rotating plate and a lower plate fixing seat connected with the lower rotating plate, wherein the upper rotating plate is provided with a plurality of second open slots; the invention also discloses a positioning and clamping method, wherein the lower plate fixing seat is rotatably connected with the upper plate fixing seat, so that the upper rotating plate and the lower rotating plate can rotate relatively, and then two flat wires which are arranged in the first open slot and the second open slot and form the same welding spot are attached together, thereby realizing the purpose of arranging the flat wires. Through setting up lower rotor plate and the last rotor plate that can mutual rotation to set up and wait to weld the corresponding first open slot and the second open slot in solder joint position on lower rotor plate and last rotor plate, can carry out the plastic of whole solder joints simultaneously, it is efficient.

Description

Positioning and clamping device and method

Technical Field

The invention relates to the field of new energy electric automobile driving motors, in particular to a positioning and clamping device and a positioning and clamping method.

Background

With the continuous development of new energy electric vehicles, the requirements of high power density and small volume of a driving motor are further improved, and innovative support of new structures, new materials and new processes is needed. Because the slot filling rate of the flat wire stator is high, the power density can be improved, the current density can be reduced, the temperature rise is reduced, and the motor efficiency is improved. Therefore, the flat copper wire stator will be a necessary trend.

The flat wire stator comprises a stator core and a plurality of hairpins arranged on the stator core, the hairpins are flat wires covered with insulating paint, each hairpin is approximately U-shaped, after the hairpins are inserted into the stator core, angles corresponding to different hairpins are required to be twisted to the same position through twisting, and then welding is carried out.

However, after the twisting is completed, two corners of the same welding point are difficult to be in ideal positions, and always have a certain gap, and are mutually dislocated or opened, at this time, the welding cannot guarantee the quality of the welding point, and the welding is easily unqualified, so the inventor thinks that the flat wires to be welded of the stator completed by the twisting head need to be arranged so as to achieve a welding state.

The method often adopted in the existing end welding is to arrange one point after welding one point, and the arrangement of one point increases the labor intensity during welding due to more welding points of the stator, and has the defects of low efficiency, poor stability, poor consistency of the welding points and the like, thereby being not beneficial to realizing automation.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a positioning and clamping device to improve the efficiency and stability of arranging welding spots and ensure the consistency of the welding spots.

The invention provides a positioning and clamping device which comprises an upper rotating plate, a lower rotating plate, an upper plate fixing seat connected with the upper rotating plate and a lower plate fixing seat connected with the lower rotating plate, wherein a plurality of second open grooves are formed in the upper rotating plate, a plurality of first open grooves are formed in the lower rotating plate, and the positions and the number of the first open grooves and the second open grooves correspond to the positions and the number of flat wires to be welded at the end part of a stator.

The lower plate fixing seat is rotatably connected with the upper plate fixing seat, so that two flat wires with the same welding point are attached together to achieve the purpose of arranging the flat wires.

Furthermore, a connecting block is arranged on the lower plate fixing seat, a threaded seat is arranged on the upper plate fixing seat, and the threaded seat can be in threaded connection with the connecting block.

Further, a clamping groove is formed in the connecting block, a bolt is installed on the threaded seat, and the bolt is matched with the clamping groove to achieve connection between the threaded seat and the connecting block.

Further, the first opening groove and the second opening groove are respectively provided with a gradually narrowing mouth, and the first opening groove and the second opening groove are mutually matched for tightening two flat wires to be welded.

Furthermore, a step is arranged on the upper plate fixing seat, the lower plate fixing seat is installed on the step of the upper plate fixing seat, and the lower plate fixing seat and the lower rotating plate are located between the upper plate fixing seat and the upper rotating plate.

Furthermore, a round angle is arranged on one side of the first opening groove, which is in contact with the flat wire.

The invention also provides a positioning and clamping method, which comprises the following steps:

s1, inserting notches formed by the first open grooves and the second open grooves into corresponding welding spots on the end parts of the flat wire stator;

and S2, driving the lower plate fixing seat to rotate around the upper plate fixing seat to enable the upper rotating plate and the lower rotating plate to rotate relatively, and further enabling two flat wires which are arranged in the first opening groove and the second opening groove and form the same welding spot to be attached together to achieve the purpose of arranging the flat wires.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the positioning and clamping device, the lower rotating plate and the upper rotating plate which can rotate mutually are arranged, and the first opening groove and the second opening groove which correspond to the positions of welding spots to be welded are arranged on the lower rotating plate and the upper rotating plate, so that all welding spots can be shaped at the same time, and the efficiency is high.

2. The first open slot and the second open slot of the positioning and clamping device are arranged in a gradually-closing mode, and the flat wire is positioned at a narrow open slot by rotating the die under the condition that the flat wire of the stator is ensured to be inserted into the die, so that the flat wire is positioned, and the operation is simple.

3. According to the positioning and clamping device, the difference between the position of the to-be-welded point after shaping is smaller than the theoretical position, the position of the welding point can be identified in a visual mode and the like, automation can be better realized, and the consistency of the welding point can be ensured.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the positioning and clamping device of the present invention;

FIG. 2 is a top view of the lower rotating plate of the present inventive alignment fixture;

FIG. 3 is a top view of the upper rotating plate of the present inventive alignment fixture;

FIG. 4 is a schematic structural view of the positioning and clamping device of the present invention showing the upper rotating plate and the lower rotating plate in the initial state;

FIG. 5 is a schematic structural view of the positioning and clamping device of the present invention, illustrating the operation of the upper rotating plate and the lower rotating plate;

FIG. 6 is a schematic structural view of the positioning and clamping device of the present invention before the shaping of a single notch;

FIG. 7 is a schematic view of the positioning and clamping device of the present invention after the shaping of a single notch; and

FIG. 8 is a cross-sectional view of the positioning and clamping device of the present invention after the shaping of the individual notches is completed.

Description of the reference numerals

1. An upper plate fixing seat; 2. a lower plate fixing seat; 3. a lower rotating plate; 4. an upper rotating plate; 5. connecting blocks; 6. a threaded seat; 7. a stator; 31. a first open slot; 32. round corners; 41. a second open slot.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1-8 illustrate some embodiments according to the invention.

As shown in fig. 1, a positioning and clamping device includes an upper rotating plate 4, a lower rotating plate 3, an upper plate fixing seat 1 connected to the upper rotating plate 4, and a lower plate fixing seat 2 connected to the lower rotating plate 3.

Specifically, as shown in fig. 1, the upper plate fixing seat 1 is sleeved on the stator 7, the upper plate fixing seat 1 is positioned through the outer circle of the stator 7 and can rotate on the stator 7, a step is arranged on the upper plate fixing seat 1, a ring groove is formed between the upper plate fixing seat 1 and the upper rotating plate 4, and the lower plate fixing seat 2 is mounted on the step of the upper plate fixing seat 1 and can freely rotate along the ring groove, so that two assemblies which can rotate independently are formed.

As shown in fig. 2 to 3, the lower rotating plate 3 is provided with a plurality of first opening grooves 31 having a necking function, the upper rotating plate 4 is provided with a plurality of second opening grooves 41, and the opening positions and the number of the first opening grooves 31 and the second opening grooves 41 correspond to the positions and the number of the flat wires to be welded at the end of the stator.

As shown in fig. 2 and 3, the first opening groove 31 and the second opening groove 41 respectively have gradually narrowed portions, one circumferential end of the first opening groove 31 is gradually narrowed along the radial direction of the stator, but the gradually narrowed end of the first opening groove 31 is opposite to the gradually narrowed end of the second opening groove 41 in the setting direction, and the first opening groove 31 and the second opening groove 41 are matched with each other to tighten two flat wires to be welded.

When the flat wire stator works, the first opening groove 31 on the lower rotating plate 3 and the second opening groove 41 on the upper rotating plate 4 are sleeved on the flat wire stator, and at this time, a gap a and a gap b (shown in fig. 4 and 6) in different directions exist between two flat wires sleeved between the first opening groove 31 and the second opening groove 41.

Then, the lower rotating plate 3 and the upper rotating plate 4 are rotated in opposite directions by rotating the lower plate fixing seat 2, the gradually narrowed end of the first opening groove 31 is close to the gradually narrowed end of the second opening groove 41, and two flat wires sleeved between the first opening groove and the second opening groove are extruded to be tightly attached together (as shown in fig. 5, 7 and 8), so that the flat wire arrangement work in the flat wire stator is completed.

As shown in fig. 8, a round corner 32 (adapted to a bending portion of the flat wire) is disposed at a side of the first opening groove 31 contacting the flat wire, and the round corner 32 is used for preventing the flat wire from being damaged in the clamping process.

s1, inserting the notches formed by the first open groove 31 and the second open groove 41 into corresponding welding spots on the end part of the flat wire stator;

s2, driving the lower plate fixing seat 2 to rotate around the upper plate fixing seat 1 to enable the upper rotating plate 4 and the lower rotating plate 3 to rotate relatively, and further enabling two flat wires which are arranged in the first opening groove 31 and the second opening groove 41 and form the same welding point to be attached together to achieve the purpose of arranging the flat wires.

In an embodiment, as shown in fig. 1, the positioning and clamping device further includes a connecting block 5 and a screw seat 6, the connecting block 5 and the screw seat 6 perform a function similar to a handle and a function similar to fixing, and the connecting block 5 is fixed to the lower plate fixing seat 2, and the screw seat 6 is fixed to the upper plate fixing seat 1, and the lower rotating plate 3 or the upper rotating plate 4 can be driven to rotate by rotating the connecting block 5 or the screw seat 6.

Wherein, be provided with the draw-in groove on the connecting block 5, install the bolt on the screw thread seat 6, the bolt can pass draw-in groove and 6 threaded connection of screw thread seat, in order to realize screw thread seat 6 with be connected between the connecting block 5.

After the connecting block 5 and the threaded seat 6 rotate relatively, the connecting block 5 and the threaded seat 6 can be kept relatively fixed by screwing the bolt, flat wires extruded through the first opening groove 31 and the second opening groove 41 are further arranged neatly, the positions are kept relatively stable, the phenomenon that the flat wires are not neat is avoided, and the welding quality of the next welding process is guaranteed.

The working process of the positioning and clamping device is as follows:

firstly, the positioning and clamping device is placed on the stator finished by the twisting head, and each welding spot is correspondingly inserted into the notch formed by the first opening groove 31 and the second opening groove 41.

Then, the distance between the connecting block 5 and the threaded seat 6 is reduced by using a bolt, so that the connecting block 5 and the threaded seat 6 rotate relatively, the lower rotating plate 3 and the upper rotating plate 4 are further driven to rotate, the notch formed by the first opening groove 31 and the second opening groove 41 is gradually reduced, and meanwhile, the flat wires filled in the notches are extruded, so that the two flat wires are tightly attached together, and the positioning and clamping of the flat wires are completed.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A positioning and clamping device is characterized by comprising an upper rotating plate (4), a lower rotating plate (3), an upper plate fixing seat (1) connected with the upper rotating plate (4), and a lower plate fixing seat (2) connected with the lower rotating plate (3); the upper rotating plate (4) is provided with a plurality of second open grooves (41), the lower rotating plate (3) is provided with a plurality of first open grooves (31), the opening positions and the number of the first open grooves (31) and the second open grooves (41) correspond to the positions and the number of the flat wires to be welded at the end part of the stator (7) and are used for sheathing the welding points to be welded at the end part of the flat wire stator, the first open grooves (31) and the second open grooves (41) are respectively provided with gradually narrowed tapered openings, the gradually narrowed end of the first open grooves (31) is opposite to the gradually narrowed end of the second open grooves (41) in the setting direction, and the first open grooves and the second open grooves are matched with each other and used for tightening the two flat wires to be welded; the flat wire arranging machine is characterized in that a step is arranged on the upper plate fixing seat (1), the lower plate fixing seat (2) is installed on the step of the upper plate fixing seat (1), the lower plate fixing seat (2) and the lower rotating plate (3) are located between the upper plate fixing seat (1) and the upper rotating plate (4), the lower plate fixing seat (2) is rotatably connected with the upper plate fixing seat (1), and two flat wires of the same welding point are attached together to achieve the purpose of arranging the flat wires.

2. The positioning and clamping device as recited in claim 1, characterized in that the lower plate fixing base (2) is provided with a connecting block (5), the upper plate fixing base (1) is provided with a threaded base (6), and the threaded base (6) can be in threaded connection with the connecting block (5).

3. The positioning and clamping device according to claim 2, characterized in that a clamping groove is arranged on the connecting block (5), and a bolt is mounted on the threaded seat (6), wherein the bolt and the clamping groove cooperate to realize the connection between the threaded seat (6) and the connecting block (5).

4. The positioning and clamping device as recited in claim 1, characterized in that the side of the first opening groove (31) contacting the flat wire is provided with a rounded corner (32).

5. A positioning and clamping method, characterized in that the positioning and clamping device according to any one of claims 1-4 comprises the following steps:

s1, inserting the notches formed by the first opening groove (31) and the second opening groove (41) into corresponding welding spots on the end part of the flat wire stator;

s2, driving the lower plate fixing seat (2) to rotate around the upper plate fixing seat (1) to enable the upper rotating plate (4) and the lower rotating plate (3) to rotate relatively, and then enabling the two flat wires which are arranged in the first opening groove (31) and the second opening groove (41) to form the same welding spot to be attached together to achieve the purpose of arranging the flat wires.