Welding device

Abstract

The utility model discloses a welding device which is used for welding a vehicle battery pack. Comprising a welding gun assembly, a first stroke mechanism in transmission connection with the welding gun assembly and used for driving the welding gun assembly to move in the preset first direction, and a second stroke mechanism in transmission connection with the first stroke mechanism and used for driving the first stroke mechanism to move in the preset second direction. The third stroke mechanism is in transmission connection with the second stroke mechanism and used for driving the second stroke mechanism to move in the preset third direction, and every two of the first direction, the second direction and the third direction are perpendicular to each other.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding of automobile battery packs, and in particular relates to a welding device. Background Art

[0002] With the continuous development of the new energy vehicle industry, battery packs that provide power for automobile driving currently use CTP (Cell to Pack, module-free power battery pack) technology as a design and manufacturing solution, because this solution can not only save costs and reduce the weight of the battery pack itself to the greatest extent, but also help to improve the vehicle's range. However, during the implementation of this solution, how to weld the stacked battery cells and copper bars has become the focus of current attention, especially for battery packs with a large span between the battery cells and copper bars. Therefore, those skilled in the art are committed to developing a welding device that meets the welding needs of automotive battery packs and is flexible and mobile. Utility Model Content

[0003] The utility model aims to provide a welding device to solve the shortcomings of the prior art, such as limited travel distance, low efficiency, etc.

[0004] In order to achieve the above technical objectives, the utility model provides a welding device for welding processing of vehicle battery packs, including a welding gun assembly, a first stroke mechanism transmission-connected to the welding gun assembly for driving the welding gun assembly to move along a preset first direction, a second stroke mechanism transmission-connected to the first stroke mechanism for driving the first stroke mechanism to move along a preset second direction, and a third stroke mechanism transmission-connected to the second stroke mechanism for driving the second stroke mechanism to move along a preset third direction, wherein the first direction, the second direction and the third direction are all perpendicular to each other.

[0005] Preferably, the welding gun assembly comprises a welding gun fixing seat and a welding gun fixedly connected to the welding gun fixing seat, and the welding gun is parallel to the length direction of the first stroke mechanism.

[0006] Preferably, the first travel mechanism includes a first sliding frame fixedly connected to the welding gun fixing seat, a first bracket connected to the first sliding frame for relative movement, and a first servo mechanism installed at one end of the first bracket to drive the first sliding frame to move along the first direction.

[0007] Preferably, the welding device includes a cable and a first drag chain wrapped around the outside of the cable and parallel to the length direction of the first stroke mechanism, one end of the first drag chain is connected to the first sliding frame, and the other end is connected to the first bracket.

[0008] Preferably, the first bracket includes a bracket body, a bracket top cover parallel to the bracket body and penetrating the first sliding frame, and a bracket end cover installed between the bracket body and the bracket top cover.

[0009] Preferably, the first servo mechanism includes a servo motor, a lead screw connected to the servo motor, and bearing seats mounted at both ends of the lead screw.

[0010] Preferably, the second travel mechanism includes a second sliding frame connected to the bracket body, a second bracket connected to the second sliding frame for relative movement and perpendicular to the bracket body, and a second servo mechanism installed at one end of the second bracket to drive the second sliding frame to move along the second direction.

[0011] Preferably, the third travel mechanism includes a third sliding frame connected to the second frame, a third frame connected to the third sliding frame for relative movement and perpendicular to the second frame, and a third servo mechanism installed at one end of the third frame to drive the third sliding frame to move along the third direction.

[0012] Preferably, the welding device comprises a support assembly, wherein the support assembly comprises a bottom plate, a top plate, and a support seat connected between the bottom plate and the top plate.

[0013] Preferably, the support seat has reinforcing ribs extending along the length direction of the support seat.

[0014] In summary, the utility model has the following beneficial effects:

[0015] The utility model discloses a welding device for welding processing of vehicle battery packs, which includes a welding gun assembly, a first stroke mechanism connected to the welding gun assembly for driving the welding gun assembly to move along a preset first direction, a second stroke mechanism connected to the first stroke mechanism for driving the first stroke mechanism to move along a preset second direction, and a third stroke mechanism connected to the second stroke mechanism for driving the second stroke mechanism to move along a preset third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other. Compared with the prior art, the welding gun assembly can move freely at any position in the space formed by the first direction, the second direction and the third direction under the joint action of the first stroke mechanism, the second stroke mechanism and the third stroke mechanism, and can quickly weld stacked battery cells and copper bars, especially battery packs with a large span of battery cells and copper bars, thereby improving welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the assembly structure of a welding device provided in an embodiment of the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the assembly structure of a welding gun assembly in a welding device shown;

[0019] Figure 3 for Figure 1 The schematic diagram of the assembly structure of the first stroke mechanism in the welding device shown;

[0020] Figure 4 for Figure 3 The exploded structural diagram of the first stroke mechanism shown;

[0021] Figure 5 for Figure 3 The schematic diagram of the cross-sectional structure of the first stroke mechanism in the AA direction is shown;

[0022] Figure 6 for Figure 1 The exploded structural diagram of the second stroke mechanism in the welding device shown;

[0023] Figure 7 for Figure 1 The exploded structural diagram of the third stroke mechanism in the welding device shown;

[0024] Figure 8 for Figure 1 A schematic diagram of the assembly structure of the support component in the welding device is shown.

[0025] Description of reference numerals:

[0026] 1. Welding gun assembly; 2. First travel mechanism; 3. Second travel mechanism; 4. Third travel mechanism; 5. First drag chain; 6. Second drag chain; 7. Third drag chain; 8. Support assembly;

[0027] 11. Welding gun; 12. Welding gun fixing seat;

[0028] 21. first sliding frame; 22. first bracket; 23. first servo mechanism;

[0029] 22a, support body; 22b, support top cover; 22c, support end cover;

[0030] 23a, servo motor; 23b, lead screw; 23c, bearing seat;

[0031] 31. second sliding frame; 32. second bracket; 33. second servo mechanism; 34. bracket seat;

[0032] 41. a third sliding frame; 42. a third bracket; 43. a third servo mechanism;

[0033] 81. Support seat; 82. Bottom plate; 83. Top plate. DETAILED DESCRIPTION

[0034] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0037] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0038] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0039] See also Figure 1As shown, an embodiment of the utility model provides a welding device for welding processing of vehicle battery packs. From the overall point of view, the welding device has a symmetrical structure, which includes a welding gun assembly 1, a first stroke mechanism 2 connected to the welding gun assembly 1 for driving the welding gun assembly 1 to move along a preset first direction, a second stroke mechanism 3 connected to the first stroke mechanism 2 for driving the first stroke mechanism 2 to move along a preset second direction, and a third stroke mechanism 4 connected to the second stroke mechanism 3 for driving the second stroke mechanism 3 to move along a preset third direction. In this way, under the joint action of the first stroke mechanism 2, the second stroke mechanism 3 and the third stroke mechanism 4, the welding gun assembly 1 can move freely to any position in the space formed by the first direction, the second direction and the third direction, which is beneficial for welding battery packs with a large span between the battery cell and the copper busbar, especially module-free power battery packs. It should be noted that the first direction mentioned here may refer to a direction perpendicular to the ground or Figure 1 The Z direction in the second direction is the direction parallel to the ground or Figure 1 The third direction is the direction parallel to the ground or Figure 1 The first direction, the second direction and the third direction are all perpendicular to each other.

[0040] See also Figure 2 As shown, the welding gun assembly 1 includes a welding gun 11 and a welding gun fixing seat 12 fixedly connected to the welding gun 11. The welding gun 11 is columnar, and one end of it is conical so as to contact with the weld; the welding gun fixing seat 12 is L-shaped plate-shaped, and a through hole for connection is opened on the outer surface, one end of which is fixedly connected to the welding gun 11 by a fastening bolt, and the other end is fixedly connected to the first stroke mechanism 2 by a fastening bolt. Preferably, the welding gun 11 is arranged parallel to the length direction of the first stroke mechanism 2. In this way, when the first stroke mechanism 2 moves along the first direction, the welding gun 11 can be moved synchronously along the first direction.

[0041] See also Figure 3 As shown, the first stroke mechanism 2 includes a first sliding frame 21 fixedly connected to the welding gun fixing base 12, a first bracket 22 movably connected to the first sliding frame 21, and a first servo mechanism 23 installed at one end of the first bracket 22 to drive the first sliding frame 21 to move along the first direction.

[0042] See also Figure 4As shown, the first sliding frame 21 is in the shape of a rectangular plate, and a slide groove (not marked in the figure) is opened in the middle part and runs through the length direction of the first sliding frame 21; the first bracket 22 is in the shape of a rectangular strip, including a bracket body 22a with a concave cross-section, a bracket top cover 22b parallel to the bracket body 22a and running through the first sliding frame 21, and a bracket end cover 22c installed between the bracket body 22a and the bracket top cover 22b, wherein the bracket end cover 22c is arranged at both ends of the bracket body 22a; the first servo mechanism 23 includes a servo motor 23a, a lead screw 23b connected to the servo motor 23a, and bearing seats 23c installed at both ends of the lead screw 23b. In this way, when the first sliding frame 21 is connected to the first bracket 22, at this time, the bracket top cover 22b of the first bracket 22 runs through the slide groove of the first sliding frame 21, so that the inner wall of the slide groove contacts and the outer surface of the bracket top cover 22b to form a match. Please refer to Figure 5 Preferably, the first sliding frame 21 and the first bracket 22 are clearance-matched. When the first sliding frame 21 moves along the first direction driven by the first servo mechanism 23, the welding gun assembly 1 connected to the first sliding frame 21 can be synchronously moved along the first direction. It should be noted that the servo motor 23a and the lead screw 23b in the first servo mechanism 23 can be played by the existing servo motor and ball screw pair.

[0043] In this embodiment, in order to ensure the stability of the connection between the first stroke mechanism 2 and the second stroke mechanism 3, the first stroke mechanism 2 also includes a connecting plate (not shown in the figure), which is in the shape of a rectangular plate and is beneficial for providing a connection position for the second sliding frame 31 of the second stroke mechanism 3.

[0044] See also Figure 6As shown, the second stroke mechanism 3 includes a second sliding frame 31 connected to the bracket body 22a of the first stroke mechanism 2, a second bracket 32 ​​connected to the second sliding frame 31 so as to be relatively movably connected and perpendicular to the bracket body 22a, and a second servo mechanism 33 installed at one end of the second bracket 32 ​​to drive the second sliding frame 31 to move along the second direction. It should be noted that in this embodiment, the second sliding frame 31, the second bracket 32 ​​and the second servo mechanism 33 are respectively the same in shape and structure as the first sliding frame 21, the first bracket 22 and the first servo mechanism 23 of the first stroke mechanism 2, and will not be described in detail here. The difference is that the second stroke mechanism 3 also includes a bracket seat 34, and the longitudinal section of the bracket seat 34 is a T-shaped structure to ensure the connection stability between the second stroke mechanism 3 and the third stroke mechanism 4. When the second sliding frame 31, the second bracket 32, the second servo mechanism 33 are connected to the bracket seat 34, the second bracket 32 ​​is fixedly connected to one side of the bracket seat 34, and the bracket top cover of the second bracket 32 ​​passes through the slide groove of the second sliding frame 31. When the second sliding frame 31 moves along the second direction driven by the second servo mechanism 33, the welding gun assembly 1 connected to the second sliding frame 31 through the first stroke mechanism 2 can be moved synchronously along the second direction.

[0045] See also Figure 7 As shown, the third travel mechanism 4 includes a third sliding frame 41 connected to the support seat 34, a third bracket 42 connected to the third sliding frame 41 so as to be relatively movably connected and perpendicular to the second bracket 32, and a third servo mechanism 43 installed at one end of the third bracket 42 to drive the third sliding frame 41 to move along the third direction. It should be noted that the third sliding frame 41, the third bracket 42 and the third servo mechanism 43 are respectively the same in shape and structure as the first sliding frame 21, the first bracket 22 and the first servo mechanism 23 of the first travel mechanism 2, and will not be described in detail here. When the third sliding frame 41, the third bracket 42 and the third servo mechanism 43 are connected, the bracket top cover of the third bracket 42 passes through the slide slot of the third sliding frame 41, and when the third sliding frame 41 moves along the third direction under the drive of the third servo mechanism 43, the welding gun assembly 1 connected to the third sliding frame 41 through the second travel mechanism 3 and the first travel mechanism 2 can be synchronously moved along the third direction.

[0046] In this embodiment, in order to ensure the stability of the welding device, the welding device includes a support assembly 8, see Figure 8 As shown, the support assembly 8 includes a support seat 81, a bottom plate 82 and a top plate 83, wherein the top plate 83 is connected to the third bracket 42 of the third stroke mechanism 4, the bottom plate 82 is in contact with the ground, and the support seat 81 is arranged between the bottom plate 82 and the top plate 83. Preferably, the support seat 81 is in an I-shape, and a reinforcing rib (not marked in the figure) extending along the length direction of the support seat 81 is formed on the outer surface.

[0047] In some embodiments, the number of the support bases 81 may be multiple. In this embodiment, the number of the support bases 81 is four.

[0048] In this embodiment, in order to ensure that the moving distance of the welding device during use meets the requirements, the welding device also includes a cable (not shown in the figure). Preferably, the cable includes a power cable and a signal cable.

[0049] Furthermore, since the welding device performs reciprocating motion with high frequency during use, in this embodiment, in order to protect the cable, the welding device further includes a first drag chain 5, a second drag chain 6 and a third drag chain 7 which are respectively arranged along the first direction, the second direction and the third direction and respectively adapted to the first stroke mechanism 2, the second stroke mechanism 3 and the third stroke mechanism 4, and are in a chain shape and are used to wrap around the outside of the cable, see Figure 1 As shown. It should be noted that the first drag chain 5 is parallel to the length direction of the first stroke mechanism 2, one end is fixedly connected to the first sliding frame 21, and the other end is fixedly connected to the first bracket 22. In this way, when the first sliding frame 21 of the first stroke mechanism 2 moves up and down along the first direction under the drive of the first servo mechanism 23, the first drag chain 5 is synchronously folded or released under the traction of the first sliding frame 21, thereby protecting the cables in the first drag chain 5 from wear and tear, ensuring the use function of the welding device. The second drag chain 6 and the third drag chain 7 are similar to the first drag chain 5 in arrangement and function, the difference is that the second drag chain 6 is parallel to the length direction of the second stroke mechanism 3, and the third drag chain 7 is parallel to the length direction of the third stroke mechanism 4, which will not be repeated here. Preferably, the first drag chain 5, the second drag chain 6 and the third drag chain 7 are all bridge-type drag chains.

[0050] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. A welding device for welding a battery pack for a vehicle, characterized in that: The invention comprises a welding gun assembly (1), a first stroke mechanism (2) connected to the welding gun assembly (1) for driving the welding gun assembly (1) to move along a preset first direction, a second stroke mechanism (3) connected to the first stroke mechanism (2) for driving the first stroke mechanism (2) to move along a preset second direction, and a third stroke mechanism (4) connected to the second stroke mechanism (3) for driving the second stroke mechanism (3) to move along a preset third direction, wherein the first direction, the second direction and the third direction are all perpendicular to each other.

2. The welding device according to claim 1, characterized in that The welding gun assembly (1) comprises a welding gun fixing seat (12) and a welding gun (11) fixedly connected to the welding gun fixing seat (12), wherein the welding gun (11) is parallel to the length direction of the first stroke mechanism (2).

3. The welding device according to claim 2, characterized in that: The first travel mechanism (2) comprises a first sliding frame (21) fixedly connected to the welding gun fixing seat (12), a first bracket (22) connected to the first sliding frame (21) so as to be relatively movably connected, and a first servo mechanism (23) installed at one end of the first bracket (22) to drive the first sliding frame (21) to move along the first direction.

4. The welding device according to claim 3, characterized in that The welding device comprises a cable and a first drag chain (5) wrapped around the outside of the cable and parallel to the length direction of the first travel mechanism (2); one end of the first drag chain (5) is connected to the first sliding frame (21), and the other end is connected to the first bracket (22).

5. The welding device according to claim 4, characterized in that The first bracket (22) comprises a bracket body (22a), a bracket top cover (22b) parallel to the bracket body (22a) and penetrating the first sliding frame (21), and a bracket end cover (22c) installed between the bracket body (22a) and the bracket top cover (22b).

6. The welding device according to claim 5, characterized in that The first servo mechanism (23) comprises a servo motor (23a), a lead screw (23b) connected to the servo motor (23a), and bearing seats (23c) mounted at both ends of the lead screw (23b).

7. The welding device according to claim 6, characterized in that The second travel mechanism (3) comprises a second sliding frame (31) connected to the support body (22a), a second support (32) connected to the second sliding frame (31) so as to be relatively movably connected and perpendicular to the support body (22a), and a second servo mechanism (33) installed at one end of the second support (32) to drive the second sliding frame (31) to move along the second direction.

8. The welding device according to claim 7, characterized in that The third travel mechanism (4) comprises a third sliding frame (41) connected to the second frame (32), a third frame (42) connected to the third sliding frame (41) so as to be relatively movably connected and perpendicular to the second frame (32), and a third servo mechanism (43) installed at one end of the third frame (42) to drive the third sliding frame (41) to move along the third direction.

9. The welding device according to claim 1, characterized in that: The welding device comprises a support assembly (8), wherein the support assembly (8) comprises a bottom plate (82), a top plate (83), and a support seat (81) connected between the bottom plate (82) and the top plate (83).

10. The welding device according to claim 9, characterized in that The support seat (81) has reinforcing ribs extending along the length direction of the support seat (81).

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