A welding fixture for battery frames of new energy vehicles

Abstract

This utility model relates to the field of new energy battery technology, specifically to a welding fixture for a battery frame of a new energy vehicle. It includes an ultrasonic welding machine body with a positioning plate on the machine body. An mounting plate is fixedly connected to the upper end of the positioning plate, and an mounting groove is formed at the upper end of the mounting plate. A matching battery frame is placed in the mounting groove. Through the linkage design of the pressing mechanism and the negative pressure adsorption mechanism, the adsorption action is triggered simultaneously when the electric cylinder drives the pressing plate to press down, forming a dual fixation of mechanical pressing and negative pressure adsorption. This effectively prevents frame displacement during welding. The piston rod movement drives a gear and rack transmission, converting the linear motion of the electric cylinder into the reciprocating motion of the pull rod, achieving synchronous execution of adsorption and pressing. No additional power source is required, simplifying the operation process.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery technology, specifically to a welding fixture for a battery frame of a new energy vehicle. Background Technology

[0002] With the global energy structure transformation and the advancement of "dual carbon" goals, the popularity of new energy vehicles (such as pure electric vehicles and plug-in hybrid vehicles) is rapidly increasing. As the core power source of new energy vehicles, the safety, lightweighting and structural strength of the battery system directly affect the vehicle's range, safety performance and manufacturing cost. As the carrier of the battery module, the battery frame must meet stringent technical requirements.

[0003] With the rapid development of the new energy vehicle industry, the welding precision and stability requirements for battery frames, as the load-bearing structure of core components, are increasingly stringent. Traditional battery frame welding fixtures mostly employ mechanical clamping or pneumatic clamping methods, which present the following problems:

[0004] 1. During the clamping process, external vibration or frame deformation can easily cause positioning deviation, affecting welding quality;

[0005] 2. The clamping mechanism operates independently, requiring additional control over the coordination of adsorption and clamping, resulting in a complex and inefficient operation process. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a welding fixture for battery frames of new energy vehicles, which can effectively solve the problems of insufficient clamping accuracy and complex and inefficient clamping process in the existing technology.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] This utility model provides a welding fixture for a battery frame of a new energy vehicle, including an ultrasonic welding machine body. A positioning plate is provided on the ultrasonic welding machine body, and an installation plate is fixedly connected to the upper end of the positioning plate. An installation groove is opened at the upper end of the installation plate, and a matching battery frame is arranged in the installation groove. Multiple pressing mechanisms are provided at the upper end of the positioning plate. Each pressing mechanism consists of an electric cylinder, a piston rod, and a pressing plate. The electric cylinder is fixedly connected to the upper end of the positioning plate, the piston rod is installed in the electric cylinder, and the pressing plate is fixedly connected to one end of the piston rod. A negative pressure adsorption mechanism is provided on one side of the electric cylinder. The negative pressure adsorption mechanism is used to adsorb and stabilize the battery frame in the installation groove.

[0009] Furthermore, the negative pressure adsorption mechanism consists of an adsorption tank, a piston cylinder, a pull rod, an air suction plate, and a drive assembly. The adsorption tank is located on the lower inner wall of the mounting groove. The piston cylinder is fixedly connected to one side of the inner wall of the mounting plate. The air suction plate is slidably connected inside the piston cylinder. The pull rod is fixedly connected to one end of the air suction plate and moves through one end of the piston cylinder. The drive assembly is located on one side of the pull rod and connected to the piston rod, and is used to drive the movement of the pull rod by moving the piston rod.

[0010] Furthermore, the drive assembly consists of a drive block, a first rack, a gear, and a second rack. The drive block is fixedly connected to the circumferential surface of the piston rod, the second rack is fixedly connected to one end of the pull rod, the first rack is fixedly connected to one end of the drive block, and the gear is rotatably connected to the upper end of the positioning plate via a rotating shaft, and the gear meshes with both the first rack and the second rack.

[0011] Furthermore, a limiting groove is formed at the upper end of the positioning plate, and a limiting block is fixedly connected to the lower end of the second rack, with the limiting block slidably connected within the limiting groove.

[0012] Furthermore, the diameter of the suction plate is larger than the diameter of the pull rod, and two protective covers are fixedly connected to the upper end of the positioning plate.

[0013] Furthermore, the adsorption tank is L-shaped, and the upper end of the positioning plate has multiple connection holes.

[0014] Beneficial effects

[0015] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0016] 1. Through the linkage design of the pressing mechanism and the negative pressure adsorption mechanism, the adsorption action is triggered at the same time as the electric cylinder drives the pressure plate to press down, forming a double fixation of mechanical pressing and negative pressure adsorption, which effectively prevents the frame displacement during welding. The piston rod motion drives the gear and rack transmission, which converts the linear motion of the electric cylinder into the reciprocating motion of the pull rod, realizing the synchronous execution of adsorption and pressing. No additional power source is required, simplifying the operation process.

[0017] 2. The sliding fit between the limiting groove and the limiting block ensures the smooth movement of the second rack and avoids jamming during gear transmission. The L-shaped adsorption groove expands the adsorption contact surface and enhances the adaptability to irregular frames.

[0018] Third, the protective cover can shield welding spatter and extend the life of critical components; multiple sets of connection holes facilitate modular expansion of the fixture to adapt to the welding needs of frames of different sizes. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front perspective view of the present invention;

[0021] Figure 2 This is a first partial top perspective view of the present invention;

[0022] Figure 3 For the present utility model Figure 2 A magnified view of a section at point A in the middle;

[0023] Figure 4 This is a partial exploded view of the present invention;

[0024] Figure 5 This is a second partial top perspective view of the present invention;

[0025] Figure 6 This is a partial side sectional perspective view of the present invention;

[0026] Figure 7 For the present utility model Figure 6 A magnified view of a section at point B.

[0027] Reference numerals in the attached drawings: 1. Ultrasonic welding machine body; 2. Positioning plate; 3. Mounting plate; 4. Battery frame; 5. Protective cover; 6. Mounting groove; 7. Electric cylinder; 8. Piston rod; 9. Pressing plate; 10. Driving block; 11. First rack; 12. Gear; 13. Second rack; 14. Pull rod; 15. Piston cylinder; 16. Limiting groove; 17. Limiting block; 18. Suction plate; 19. Adsorption groove. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] The present invention will be further described below with reference to the embodiments.

[0030] See attached document Figure 1-7A welding fixture for a battery frame of a new energy vehicle includes an ultrasonic welding machine body 1, a positioning plate 2 on the ultrasonic welding machine body 1, an mounting plate 3 fixedly connected to the upper end of the positioning plate 2, an mounting groove 6 opened at the upper end of the mounting plate 3, a matching battery frame 4 set in the mounting groove 6, multiple pressing mechanisms set at the upper end of the positioning plate 2, each pressing mechanism consisting of an electric cylinder 7, a piston rod 8 and a pressing plate 9, the electric cylinder 7 fixedly connected to the upper end of the positioning plate 2, the piston rod 8 installed in the electric cylinder 7, the pressing plate 9 fixedly connected to one end of the piston rod 8, and a negative pressure adsorption mechanism set on one side of the electric cylinder 7, the negative pressure adsorption mechanism being used to adsorb and stabilize the battery frame 4 in the mounting groove 6;

[0031] The negative pressure adsorption mechanism consists of an adsorption tank 19, a piston cylinder 15, a pull rod 14, a suction plate 18, and a drive assembly. The adsorption tank 19 is opened on the lower inner wall of the mounting groove 6. The piston cylinder 15 is fixedly connected to one side inner wall of the mounting plate 3. The suction plate 18 is slidably connected inside the piston cylinder 15. The pull rod 14 is fixedly connected to one end of the suction plate 18 and moves through one end of the piston cylinder 15. The drive assembly is located on one side of the pull rod 14 and connected to the piston rod 8, and is used to drive the movement of the pull rod 14 by the movement of the piston rod 8.

[0032] The drive assembly consists of a drive block 10, a first rack 11, a gear 12, and a second rack 13. The drive block 10 is fixedly connected to the circumferential surface of the piston rod 8. The second rack 13 is fixedly connected to one end of the pull rod 14. The first rack 11 is fixedly connected to one end of the drive block 10. The gear 12 is rotatably connected to the upper end of the positioning plate 2 via a rotating shaft, and the gear 12 meshes with both the first rack 11 and the second rack 13.

[0033] In a specific embodiment of this utility model, the battery frame welding fixture for new energy vehicles includes an ultrasonic welding machine body 1, with a positioning plate 2 mounted on its top. A mounting plate 3 is welded onto the positioning plate 2, and a rectangular mounting groove 6 is formed on the surface of the mounting plate 3 for embedding the battery frame 4. Multiple pressing mechanisms are symmetrically arranged at the four corners of the positioning plate 2. Each pressing mechanism consists of an electric cylinder 7, a piston rod 8, and a pressing plate 9. The electric cylinder 7 is fixed to the positioning plate 2 by bolts. The piston rod 8 extends and retracts vertically, and an L-shaped pressing plate 9 is welded to its end for pressing the edge of the battery frame 4. A negative pressure adsorption mechanism is provided on the side of the electric cylinder 7. Through the linkage suction of the adsorption groove 19 and the piston cylinder 15, the frame 4 is tightly adsorbed into the mounting groove 6. The negative pressure adsorption mechanism includes an L-shaped adsorption groove 19 formed at the bottom of the mounting groove 6 and a piston cylinder 15 horizontally fixed to the side wall of the mounting plate 3. A sliding, disc-shaped suction plate 18 is fitted with a pull rod 14 welded to one side of the suction plate 18. The outer end of the pull rod 14 extends to the outside of the piston cylinder 15. When the piston rod 8 is pressed down, the pull rod 14 is pulled outward through the drive assembly, causing the suction plate 18 to move backward inside the piston cylinder 15. A negative pressure is formed in the adsorption groove 19, which adsorbs and fixes the battery frame 4. The drive assembly consists of a drive block 10 fixed on the piston rod 8, a first rack 11 connected to the drive block 10, a gear 12, and a second rack 13. The gear 12 is mounted on the surface of the positioning plate 2 through a rotating shaft and meshes with the first rack 11 and the second rack 13 respectively. When the electric cylinder 7 drives the piston rod 8 to move, the drive block 10 pushes the first rack 11 to move downward, and the gear 12 rotates counterclockwise and drives the second rack 13 to move horizontally outward, thereby pulling the pull rod 14 to move synchronously, realizing the mechanical linkage of adsorption and pressing.

[0034] Please refer to the details. Figure 1-7 The upper end of the positioning plate 2 is provided with a limiting groove 16, and the lower end of the second rack 13 is fixedly connected to a limiting block 17. The limiting block 17 is slidably connected in the limiting groove 16. The diameter of the suction plate 18 is larger than the diameter of the pull rod 14. The upper end of the positioning plate 2 is fixedly connected with two protective covers 5, and the upper end of the positioning plate 2 is provided with multiple connecting holes.

[0035] In this embodiment: a T-shaped limiting groove 16 is opened on the surface of the positioning plate 2, and a matching T-shaped limiting block 17 is welded to the bottom of the second rack 13. When the gear 12 drives the second rack 13 to move horizontally, the limiting block 17 slides along the limiting groove 16 to eliminate radial wobbling during the rack's movement and ensure the linear motion accuracy of the pull rod 14. The diameter of the suction plate 18 is designed to be 95% of the inner diameter of the piston cylinder 15 to ensure sealing during the pull. The diameter of the pull rod 14 is only 1 / 3 of that of the suction plate 18 to reduce movement resistance. The adsorption groove 19 adopts an L-shaped layout, with its horizontal section extending to the lower side wall of the frame 4 to increase the adsorption area and prevent the frame 4 from warping. Metal protective covers 5 are installed on both sides of the positioning plate 2 to cover the gear 12, the first rack 11, and the second rack 13 to avoid welding spatter contaminating the transmission components. Multiple bolt connection holes are evenly opened on the edge of the positioning plate 2 to facilitate the adaptation of battery frames of different specifications by adding or removing the mounting plate 3 module.

[0036] Working principle: The battery frame 4 is placed in the mounting slot 6. The electric cylinder 7 is activated to drive the piston rod 8 to press down. The pressing plate 9 presses the edge of the frame. When the piston rod 8 moves down, it drives the block 10 through the first rack 11, gear 12 and second rack 13 to pull the pull rod 14 outward. A negative pressure is generated in the piston cylinder 15. The adsorption groove 19 adheres to the bottom of the frame. The ultrasonic welding head welds the frame. The dual action of pressing and adsorption ensures zero offset in the welding. After the welding is completed, the electric cylinder 7 is reset, the pull rod 14 is pushed inward to release the adsorption, and the finished frame is taken out.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A new energy vehicle battery frame welding clamp, comprising an ultrasonic welding machine body (1), characterized in that: The ultrasonic welding machine body (1) is provided with a positioning plate (2), and an installation plate (3) is fixedly connected to the upper end of the positioning plate (2). An installation groove (6) is opened at the upper end of the installation plate (3). A matching battery frame (4) is provided in the installation groove (6). Multiple pressing mechanisms are provided at the upper end of the positioning plate (2). Each pressing mechanism consists of an electric cylinder (7), a piston rod (8), and a pressing plate (9). The electric cylinder (7) is fixedly connected to the upper end of the positioning plate (2). The piston rod (8) is installed in the electric cylinder (7). The pressing plate (9) is fixedly connected to one end of the piston rod (8). A negative pressure adsorption mechanism is provided on one side of the electric cylinder (7). The negative pressure adsorption mechanism is used to adsorb and stabilize the battery frame (4) in the installation groove (6).

2. The battery frame welding fixture for new energy vehicles according to claim 1, characterized in that, The negative pressure adsorption mechanism consists of an adsorption tank (19), a piston cylinder (15), a pull rod (14), an air suction plate (18), and a drive assembly. The adsorption tank (19) is opened on the lower inner wall of the mounting groove (6). The piston cylinder (15) is fixedly connected to the inner wall of one side of the mounting plate (3). The air suction plate (18) is slidably connected inside the piston cylinder (15). The pull rod (14) is fixedly connected to one end of the air suction plate (18), and the pull rod (14) moves through one end of the piston cylinder (15). The drive assembly is located on one side of the pull rod (14) and connected to the piston rod (8), and is used to drive the movement of the pull rod (14) by the movement of the piston rod (8).

3. The battery frame welding fixture for new energy vehicles according to claim 2, characterized in that, The drive assembly consists of a drive block (10), a first rack (11), a gear (12), and a second rack (13). The drive block (10) is fixedly connected to the circumferential surface of the piston rod (8). The second rack (13) is fixedly connected to one end of the pull rod (14). The first rack (11) is fixedly connected to one end of the drive block (10). The gear (12) is rotatably connected to the upper end of the positioning plate (2) via a rotating shaft, and the gear (12) meshes with both the first rack (11) and the second rack (13).

4. A battery frame welding fixture for new energy vehicles according to claim 3, characterized in that, The upper end of the positioning plate (2) has a limiting groove (16), and the lower end of the second rack (13) is fixedly connected to a limiting block (17), which is slidably connected in the limiting groove (16).

5. A battery frame welding fixture for new energy vehicles according to claim 4, characterized in that, The diameter of the air intake plate (18) is larger than the diameter of the pull rod (14), and the upper end of the positioning plate (2) is provided with multiple connection holes.

6. A battery frame welding fixture for new energy vehicles according to claim 5, characterized in that, The adsorption tank (19) is L-shaped, and two protective covers (5) are fixedly connected to the upper end of the positioning plate (2).

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