Welding tool for electrically controlled busbar

Abstract

The present application relates to a kind of welding tool of electric control busbar, for realizing the welding positioning of terminal on busbar body, including horizontally arranged workbench, at least two busbar positioning seats are fixedly arranged along horizontal transverse direction on workbench, busbar positioning seat extends from right front to left rear, first elastic clamp is fixedly arranged between two busbar positioning seats, first elastic clamp is used for clamping the rear side of the terminal of first terminal, second elastic clamp is fixedly arranged in the rear of each busbar positioning seat, second elastic clamp is used for clamping the rear side of the terminal of second terminal, first elastic clamp extends from left front to right rear.The present application keeps multiple joint row's work position compact arrangement, while elastic clamp function is complete, and welding machine welding torch's movement is not hindered.

Description

Technical Field

[0001] This invention relates to a clamping and positioning device, specifically to a welding fixture for an electrical control busbar. Background Technology

[0002] An existing type of electronic control busbar used on the positive and negative terminals of capacitors in new energy vehicles includes a busbar body and two terminals welded to the busbar body. The busbar body has a long strip structure, while the terminals have a thin, L-shaped bent structure. Compared to the busbar body, the terminals are smaller in size. For cost considerations, laser welding is often used to achieve a fixed connection between the busbar body and the terminals during production. One common method is for workers to place the terminals on the busbar body and then automatically weld them using a welding machine. To avoid hindering the movement of the welding torch, few positioning structures are set around the terminals (for example, existing technology only sets a positioning platform or positioning groove on one side of the terminal). This leads to unstable positioning of the terminals. In particular, due to the small size and light weight of the terminals, and the protective gas blown out during laser welding, the terminals often deviate from the intended position. This can result in problems such as loosening, misalignment, and warping gaps after welding due to unstable terminal positioning. Moreover, it is difficult to ensure the tightness of the welded surfaces. Excessive weld seam can affect the overcurrent performance of the electrical control busbar and induce poor capacitor temperature rise. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes a welding fixture for an electrical control busbar that can quickly clamp and position the wiring terminals without obstructing the movement of the welding torch.

[0004] This invention is achieved using the following technical solution:

[0005] This invention proposes a welding fixture for an electrical control busbar, used to position the terminals on the busbar body during welding. The terminals are L-shaped sheet structures, and the busbar body is a long strip structure. Each end of the busbar body has a fixing hole, with two terminals respectively positioned at each end. The welding fixture includes a horizontally positioned worktable. At least two busbar positioning seats are fixedly mounted on the worktable, arranged horizontally. The arrangement direction of the busbar positioning seats is defined as the left-right direction, and the horizontal direction perpendicular to the left-right direction is defined as the front-back direction. The busbar positioning seats extend obliquely from the right front to the left rear. Each busbar positioning seat has a pin hole and a pin corresponding to the fixing hole. The busbar body is supported by the positioning seats, and the busbar body is positioned by the pins passing through the fixing holes and pin holes. The L-shaped sheet structure terminals include components that fit against... The welding end of the busbar body and the vertically raised terminal are respectively a first terminal located at the right front and a second terminal located at the left rear. A first elastic clamp is fixed between each pair of busbar positioning seats. The first elastic clamp is used to clamp the rear side of the terminal of the first terminal to realize the welding positioning of the first terminal with the busbar body and to provide a space for the welding gun to move above the welding end of the first terminal. A second elastic clamp is fixed behind each busbar positioning seat. The second elastic clamp is used to clamp the rear side of the terminal of the second terminal to realize the welding positioning of the second terminal with the busbar body and to provide a space for the welding gun to move above the welding end of the second terminal. The first elastic clamp is set to extend obliquely from the left front to the right rear, thereby forming a space for the welding gun to move in the left front of each busbar positioning seat.

[0006] Preferably, all the second elastic clips are synchronously linked by a single linkage mechanism.

[0007] Preferably, the linkage mechanism includes a swing arm, a connecting rod, a sliding rod, a guide seat, and a push rod. The guide seat is fixed relative to the worktable and has a guide hole. The sliding rod is slidably connected to the guide hole. The swing arm is rotatably mounted. One end of the connecting rod is hinged to the sliding rod, and the other end is hinged to the swing arm. The push rod is slidably mounted on the movement path of the sliding rod as it pushes out of the guide seat. The second elastic clamp has an open position and a closed position. The push rod has a toggle part corresponding to each second elastic clamp. When the swing arm swings, it can push the push rod through the sliding rod to make the push rod slide, and the toggle part can move the second elastic clamp from the closed position to the open position.

[0008] Preferably, the push rod spans over all the second elastic clips, and at least two of the second elastic clips are fixedly provided with pins, and the push rod is provided with a strip hole that slides with the pins.

[0009] Preferably, the actuating part extends downward from the lower end of the push rod and is close to the protrusion disposed on the second elastic clamp.

[0010] Preferably, the linkage mechanism is configured such that after the push rod pushes the second elastic clamp to the open position, the swing rod is exactly at the dead point position.

[0011] Preferably, the second elastic clip includes a second claw in a seesaw structure. The second claw includes a first lever arm for clamping the terminal of the second terminal and a second lever arm for receiving the actuation of the actuating part, wherein the first lever arm is smaller than the second lever arm.

[0012] Preferably, the swing arm is positioned at the left rear of the worktable.

[0013] Preferably, the first elastic clip includes a slidably disposed first claw, and an elastic element acts on the first claw. By sliding the first claw, the first elastic clip is opened and the elastic element stores energy.

[0014] The present invention has the following beneficial effects: The present invention solves the problem of unstable terminal positioning in the prior art by clamping with the first elastic clamp and the second elastic clamp. Although the present invention uses the first elastic clamp and the second elastic clamp to clamp the terminal, the special position layout of the busbar positioning seat, the first elastic clamp and the second elastic clamp makes this embodiment maintain a compact setting of multiple rows of workstations and complete elastic clamp function without hindering the movement of the welding gun of the welding machine. Multiple rows of workstations can be operated simultaneously to realize the welding positioning of multiple electrical control busbars at one time, thereby improving production efficiency. The adjacent workstations are very compact, which can also save the volume of tooling. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the electrical control busbar in the embodiment;

[0016] Figure 2 This is a schematic diagram of the welding fixture for the electrical control busbar in the embodiment (in one case, one electrical control busbar and the corresponding first pin and second pin are shown in a separated state).

[0017] Figure 3 This is a schematic diagram of the welding fixture for the electrical control busbar in the embodiment (secondly, all electrical control busbars are positioned on the busbar positioning seat).

[0018] Figure 4 This is a schematic diagram of the first elastic clip in the embodiment;

[0019] Figure 5 This is a schematic diagram of the second elastic clip in the embodiment. Detailed Implementation

[0020] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0022] As a preferred embodiment of the present invention, a welding fixture for an electrically controlled busbar is provided, the structure of which is as follows: Figure 1 As shown, this is an electronic control busbar used on the positive and negative terminals of a capacitor in a new energy vehicle. It includes a busbar body 100 and terminals. The busbar body 100 is a long strip structure, and the terminals are L-shaped sheet structures. There are two terminals, namely the first terminal 201 and the second terminal 202. The two ends of the busbar body 100 are respectively provided with a first fixing hole 301 and a second fixing hole 302. The first fixing hole 301 and the second fixing hole 302 are used for connecting and fixing the busbar body 100, such as fixing the busbar body 100 when it is installed on the capacitor.

[0023] For this electrical control busbar, the welding fixture provided in this embodiment is used to position the wiring terminals on the busbar body 100 for welding. (See attached document.) Figure 2 , 3 As shown, the welding fixture for the electrical control busbar includes a horizontally arranged workbench 1. Four busbar positioning seats 2, arranged horizontally, are fixedly mounted on the workbench 1. Each busbar positioning seat 2 can position and support one busbar body 100. This embodiment of the welding fixture is a four-station fixture, capable of simultaneously welding and positioning the terminals on four electrical control busbars to improve production efficiency. In other embodiments, it can also be configured as a two-station, three-station, five-station, or other number of-station fixtures.

[0024] The arrangement direction of the busbar positioning seats 2 is defined as the left-right direction, and the horizontal direction perpendicular to the left-right direction is defined as the front-back direction, i.e. Figure 2In this design, X1, X2, Y1, and Y2 represent the left, right, front, and rear directions, respectively. The busbar positioning seat 2 extends obliquely from the right front to the left rear. The shape of the busbar positioning seat 2 matches the shape of the busbar body 100. The busbar positioning seat 2 has a first pin hole 31 and a first pin 41 corresponding to the first fixing hole 301, and a second pin hole 32 and a second pin 42 corresponding to the second fixing hole 302. The busbar positioning seat 2 supports the busbar body 100, and the busbar body 100 is positioned by the first pin hole 31 passing through the first fixing hole 301 and the first pin hole 31, and the second pin 42 passing through the second fixing hole 302 and the second pin hole 32. In other embodiments, other positioning structures, such as clamps, can also be used to position the busbar body 100.

[0025] Each L-shaped plate-shaped terminal includes a welded end that fits into the busbar body 100 and a vertically raised terminal. Since the busbar positioning seat 2 and the busbar body 100 extend obliquely from the front right to the rear left, the first terminal 201 is relatively located at the front right and the second terminal 202 is relatively located at the rear left. A first elastic clip 5 is fixed between two busbar positioning seats 2 arranged on the left and right. The first elastic clip 5 is used to clamp the rear side of the terminal of the first terminal 201. A second elastic clip 6 is fixed behind each busbar positioning seat 2. The second elastic clip 6 is used to clamp the rear side of the terminal of the second terminal 202. In this way, by clamping the first terminal 201 and the second terminal 202 with the first elastic clip 5 and the second elastic clip 6, the welding positioning of the terminal and the busbar body 100 is realized. In actual operation, the worker places the terminal on the busbar body 100 and then pushes it into the clamping mouth of the first elastic clip 5 / second elastic clip 6 to clamp it. This ensures that the welding end of the terminal is in contact with the busbar body 100. Due to the clamping force of the first elastic clip 5 and the second elastic clip 6, the positional stability of the terminal is guaranteed. Furthermore, since the first elastic clip 5 is clamped to the rear side of the terminal of the first terminal 201 and the second elastic clip 6 is clamped to the rear side of the terminal of the second terminal 202, it ensures that there is space for the welding torch to move above the welding end of the first terminal 201 and the welding end of the second terminal 202. That is, the first elastic clip 5 and the second elastic clip 6 will not obstruct or interfere with the movement of the welding torch during welding. In addition, the first elastic clip 5 is set to extend obliquely from the left front to the right rear, and the rear end of the first elastic clip 5 at the left station points to the rear end of the busbar positioning seat 2 at the other station on the right. Thus, the first elastic clip 5 at the left station will not occupy the left front space of the busbar positioning seat 2 at the other station on the right. In this way, a space for the welding torch to enter or exit can be formed at the left front of each busbar positioning seat 2.

[0026] This embodiment, through the above-mentioned settings, firstly solves the problem of unstable terminal positioning in the prior art by clamping with the first elastic clamp 5 and the second elastic clamp 6. Furthermore, although this embodiment uses the first elastic clamp 5 and the second elastic clamp 6 to clamp the terminal, the special positional layout of the busbar positioning seat 2, the first elastic clamp 5, and the second elastic clamp 6 allows this embodiment to maintain a compact arrangement of multiple rows of workstations, complete elastic clamp functions, and does not hinder the movement of the welding gun of the welding machine. Multiple rows of workstations can be operated simultaneously, realizing the welding positioning of multiple electrical control busbars at one time, improving production efficiency. The adjacent workstations are very compact, which can also save the volume of tooling.

[0027] In order to accommodate the tilted extension of the first elastic clip 5 from the left front to the right rear, the placement angle of the first terminal 201 has been optimized. Specifically, the terminal of the first terminal 201 is configured to face the right front.

[0028] In this embodiment, all second elastic clips 6 are synchronously linked by a linkage mechanism 7. The linkage mechanism 7 includes a swing arm 71, a connecting rod 72, a sliding rod 73, a guide seat 74, and a push rod 75. The guide seat 74 is fixed relative to the worktable 1, that is, the guide seat 74 is directly or indirectly fixedly connected to the worktable 1. The guide seat 74 is provided with a guide hole, the sliding rod 73 is slidably connected to the guide hole, the swing arm 71 is rotatably set, one end of the connecting rod 72 is hinged to the sliding rod 73, and the other end is hinged to the swing arm 71. The push rod 75 is slidably set on the movement path of the sliding rod 73 pushing out of the guide seat 74. The second elastic clips 6 have an open position and a closed position. The push rod 75 is provided with a toggle part 751 corresponding to each second elastic clip 6. When the swing arm 71 swings, it can push the push rod 75 through the sliding rod 73 to slide, and the toggle part 751 can move the second elastic clip 6 from the closed position to the open position. Therefore, by simply operating the lever 71, all the second elastic clips 6 can be opened synchronously, thus facilitating the clamping of all the second terminals 202.

[0029] In this embodiment, the push rod 75 spans above all the second elastic clips 6, and at least two of the second elastic clips 6 are fixedly provided with pins 60. The push rod 75 is provided with a strip hole 752 that slides with the pins 60, thereby realizing the slidable setting of the push rod 75. In other embodiments, the push rod 75 may also be slidably connected to other positions, such as the push rod 75 being directly or indirectly slidably connected to the worktable 1. However, the arrangement of the push rod 75 spanning above all the second elastic clips 6 in this embodiment is more conducive to reducing the overall volume of the welding fixture. In this embodiment, the actuating part 751 extends downward from the lower end of the push rod 75 and is close to the protrusion provided on the second elastic clip 6.

[0030] The linkage mechanism 7 is configured such that after the push rod 75 pushes the second elastic clamp 6 to the open position, the swing rod 71 is exactly at the dead point position. This ensures that even if the swing rod 71 is released at this point, it will not spring back, facilitating the placement of the wiring terminals by the worker. Preferably, the swing rod 71 is positioned at the left rear of the workbench 1.

[0031] Figure 4 and Figure 5 Schematic diagrams of the first elastic clip 5 and the second elastic clip 6 are shown respectively. The first elastic clip 5 has a strip-shaped structure and includes a slidably disposed first claw 51. An elastic element 52 acts on the first claw 51. Sliding the first claw 51 causes the first elastic clip 5 to open and allows the elastic element 52 to store energy. To facilitate applying force to the first claw 51, the first claw 51 includes a protruding lever 53, and the elastic element 52 is connected to the lever 53. The second elastic clip 6 has a strip-shaped structure and includes a second claw 61 with a seesaw structure. The second claw 61 includes a first lever arm 611 for clamping the terminal of the second terminal 202 and a second lever arm 612 for receiving the actuation of the actuating part 751. The first lever arm 611 is smaller than the second lever arm 612, forming a force-saving lever, so that the actuating part 751 does not need to provide too much force to open the second elastic clip 6.

[0032] The welding procedure for the electrical control busbar in this embodiment during production is as follows:

[0033] 1. Pull out the first pin 41 and the second pin 42, place the busbar body 100 on the busbar positioning seat 2, align the first fixing hole 301 and the first pin hole 31 and insert the first pin 41, align the second fixing hole 302 and the second pin hole 32 and insert the second pin 42 to achieve the positioning of the busbar body 100. In this way, a busbar body 100 is positioned on the busbar positioning seat 2 of all workstations.

[0034] 2. Move the lever 71 forward. The lever 71 swings and pushes the push rod 75 through the sliding rod 73, causing the push rod 75 to slide. The actuating part 751 of the push rod 75 moves all the second elastic clips 6 from the closed position to the open position.

[0035] 3. Place the second terminals 202 sequentially on the busbar body 1, aligning the terminals of the second terminals 202 with the clamping jaws of the second elastic clamp 6, and reverse the lever 71 so that each second terminal 202 is clamped on the second elastic clamp 6.

[0036] 4. Place the first terminal block 201 one by one on the busbar body 1, and clamp the first terminal block 201 with the first elastic clip 5;

[0037] 5. Turn on the automatic welding machine. The welding torch of the welding machine, which has been programmed with position movement, will automatically weld the first terminal 201 and the second terminal 202 that have been positioned.

[0038] Programming the position movement of the welding torch on a welding machine is a mature existing technology and needs no further explanation. Steps 2+3 and 4 above can be interchanged in order.

[0039] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail made to the invention without departing from the spirit and scope of the invention as defined in the appended claims fall within the protection scope of the invention.

Claims

1. A welding fixture for an electrical control busbar, used to weld and position terminals on the busbar body, wherein the terminals are L-shaped sheet structures, the busbar body is a long strip structure, and each end of the busbar body has a fixing hole, with two terminals respectively disposed at both ends of the busbar body, characterized in that: The welding fixture for the electrical control busbar includes a horizontally arranged workbench. At least two busbar positioning seats are fixedly mounted on the workbench, arranged horizontally. The arrangement direction of the busbar positioning seats is defined as the left-right direction, and the horizontal direction perpendicular to the left-right direction is defined as the front-back direction. The busbar positioning seats extend obliquely from the right front to the left rear. Corresponding to the fixing holes, the busbar positioning seats have pin holes and pins. The busbar body is supported by the busbar positioning seats, and the busbar body is positioned by the pins passing through the fixing holes and pin holes. The L-shaped plate-like terminal block includes a welding end that fits into the busbar body and a vertically raised wiring end. The two wiring terminals are respectively a first wiring terminal located at the right front and a second wiring terminal located at the left rear. A first elastic clamp is fixed between each pair of busbar positioning seats. The first elastic clamp is used to clamp the rear side of the wiring end of the first wiring terminal to achieve welding positioning of the first wiring terminal and the busbar body and to provide a space for the welding gun to move above the welding end of the first wiring terminal. A second elastic clamp is fixed at the rear of each busbar positioning seat. The second elastic clamp is used to clamp the rear side of the wiring end of the second wiring terminal to achieve welding positioning of the second wiring terminal and the busbar body and to provide a space for the welding gun to move above the welding end of the second wiring terminal. The first elastic clamp is set to extend obliquely from the left front to the right rear, and the rear end of the first elastic clamp of the left station points to the rear end of the busbar positioning seat of the other station on the right, thereby forming a space for the welding gun to move in front of the left side of each busbar positioning seat. All the second flexible clips are synchronized by a single linkage mechanism; The linkage mechanism includes a swing arm, a connecting rod, a sliding rod, a guide seat, and a push rod. The guide seat is fixed relative to the worktable and has a guide hole. The sliding rod is slidably connected to the guide hole. The swing arm is rotatable. One end of the connecting rod is hinged to the sliding rod, and the other end is hinged to the swing arm. The push rod is slidably disposed on the movement path of the sliding rod pushing out of the guide seat. The second elastic clamp has an open position and a closed position. The push rod has a toggle part corresponding to each second elastic clamp. When the swing arm swings, it can push the push rod through the sliding rod to make the push rod slide, and the toggle part can move the second elastic clamp from the closed position to the open position. The push rod spans over all the second elastic clips, and at least two of the second elastic clips are fixedly provided with pins. The push rod is provided with a strip hole that slides with the pins. The linkage mechanism is set such that after the push rod pushes the second elastic clamp to the open position, the swing arm is exactly at the dead point position.

2. The welding fixture for the electrical control busbar according to claim 1, characterized in that: The actuating part extends downward from the lower end of the push rod and approaches the protrusion disposed in the second elastic clamp.

3. The welding fixture for the electrical control busbar according to claim 1, characterized in that: The second elastic clip includes a second claw in a seesaw structure. The second claw includes a first lever arm for clamping the terminal of the second terminal and a second lever arm for receiving the actuation of the actuating part, wherein the first lever arm is smaller than the second lever arm.

4. The welding fixture for the electrical control busbar according to claim 1, characterized in that: The lever is positioned at the rear left of the worktable.

5. The welding fixture for the electrical control busbar according to claim 1, characterized in that: The first elastic clip includes a slidably disposed first claw, and an elastic element acts on the first claw. By sliding the first claw, the first elastic clip opens and the elastic element stores energy.

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