A precision welding fixture for manufacturing battery trays

Abstract

This invention relates to the field of battery tray manufacturing technology, specifically to a precision welding fixture for battery tray manufacturing. It includes a central limiting part and a lower support part mounted on a rotating table. The central limiting part includes an outer limiting component and a pressing component. The lower support part includes a supporting component and an inner limiting component with a telescopic structure. Both the outer and inner limiting components are evenly distributed along a loop-shaped trajectory, forming a loop-shaped placement area that provides internal and external limiting and bottom support for the side plates. This invention utilizes a fixed loop-shaped placement area with internal and external limiting and bottom support functions, formed by the cooperation of the inner and outer limiting components, along with multi-directional linkage limiting of the telescopic rod and pressing component. This achieves automatic centering, one-time placement, and stable pressing of the side plates and bottom plates. The limiting components do not need to dynamically avoid multi-dimensional welding robots, avoiding the displacement risk caused by dynamic adjustments. This ensures that the limiting components, side plates, and bottom plates remain in a continuously stable state throughout the welding process. Furthermore, it eliminates the need for high-precision sensors and dynamic adjustment components, resulting in a simple structure and convenient and intuitive operation.

Description

Technical Field

[0001] This invention relates to the field of battery tray manufacturing technology, specifically to a precision welding fixture for battery tray manufacturing. Background Technology

[0002] Battery trays are typically a key component in electric vehicles and other devices that require battery power, used to support and protect battery modules. A battery tray mainly consists of a base plate, side plates surrounding the base plate, lugs on the outer sides of the side plates, and spacers on the base plate (used to define the battery mounting area). All parts are connected and fixed together by welding.

[0003] In the manufacturing process of battery trays, welding is a crucial step in achieving overall structural strength and sealing performance. Currently, semi-automated welding equipment combined with manual clamping is commonly used for the splicing and welding of side plates and bottom plates. The welding equipment often employs a dynamic avoidance structure based on multiple limiting units. This means that several limiting units distributed along a rectangular trajectory limit and press the side plates and bottom plates. When the welding robot approaches a certain limiting unit, the control system must drive that unit to release or avoid it to prevent obstructing the weld. After the overall welding operation is completed, all limiting units must be released simultaneously. While such equipment improves welding accuracy and automation to some extent, it also presents the following problems: It relies on high-precision sensors, pneumatic / hydraulic actuators, and relatively complex control logic. Multiple limit units need to be controlled independently while also requiring overall control, resulting in a complex structure. The introduction of high-precision components and sensors significantly increases costs, making this type of equipment less suitable for small and medium-sized enterprises. Frequent "avoidance-reset" operations of the limit units during welding affect the continuity of welding, especially for long-distance single welds. Furthermore, it cannot provide continuous and stable constraints throughout the welding process. If the limit units experience signal delays due to frequent movement, it may lead to avoidance failure or reset deviations, causing robot collisions or weld misalignment. If there are deviations in the placement of the side plates and base plates, the limit units may need to adjust their stroke to compensate for the deviation. This requires further high precision in the control system, but positional deviations still exist, directly affecting welding quality. Summary of the Invention

[0004] To address the aforementioned problems, the present invention provides a precision welding fixture for manufacturing battery trays, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention employs the following technical solution: a precision welding fixture for manufacturing battery trays, used in conjunction with a multi-dimensional welding robot and a rotating table, comprising a middle limiting part and a lower supporting part disposed on the rotating table; the middle limiting part includes: several outer limiting members rotatably disposed; a pressing member disposed on the outer limiting members; the lower supporting part includes: a linearly sliding supporting member; several inner limiting members with telescopic structures disposed on the supporting member; both the outer and inner limiting members are evenly distributed along a loop trajectory, and together they form a loop placement area that provides inner and outer limiting of the side plate and bottom support; multiple pairs of telescopic rods are disposed on the supporting member and are connected to the loop trajectory. The trace corners correspond; the telescopic rod is used to automatically center the side plate of the corresponding loop track side; when the side plate of the corresponding loop track corner is placed, the telescopic rod is compressed and retracted; when the bottom plate is placed on the support and the outer side of the bottom plate abuts against the inner side of the side plate, the inner limiter retracts but still performs inner limit and bottom support, and then the outer limiter rotates to make the pressing member press the side plate, and the weld on one side of the contact end between the bottom plate and the side plate, the upper side and the outer side weld between the side plates are fully exposed; after the rotating table rotates 180°, the lower support moves away from the side plate, but the side plate is still subject to outer limit and upper and lower limit, and the weld on the other side of the contact end between the bottom plate and the side plate, the lower side and the inner side weld between the side plates are fully exposed.

[0006] Preferably, the outer limiting member consists of a frustum and a guide post, with the guide post fixedly installed on the upper end of the frustum, the frustum rotatably installed on the spiral frame, and the spiral frame fixedly installed on the rotating platform.

[0007] Preferably, the pressing component is a semi-circular plate, which is fixedly installed on the outer ring wall of the guide post at a non-sloping position.

[0008] Preferably, the middle limiting part further includes: an auxiliary limiting member for limiting the lug to be welded on the outer side of the supporting side plate; and a pressing and abutting integral member for pressing and elastically abutting the lug; the auxiliary limiting member has the same structure as the outer limiting member, but the frustum in the auxiliary limiting member is fixedly connected to the U-shaped frame.

[0009] Preferably, the pressing and pressing integrated component includes a cylinder rotatably mounted on the ring frame, the cylinder being located on the side of the corresponding auxiliary limiting component away from the center of the ring frame, and the outer ring wall of the truncated cone is equipped with a pressing block for pressing the ear piece from above, and an elastic telescopic plate for providing inward pressing force to the ear piece while pressing it.

[0010] Preferably, the frustum of the cylinders and the outer limiting members is driven by a driving member located at the lower end of the spiral frame.

[0011] Preferably, the support consists of a U-shaped lower frame, a base support installed in the middle of the lower frame via connecting ribs, and the base support is connected to the rotating table via a drive component; the fixed section of the telescopic rod runs vertically through and is fixedly installed on the lower frame.

[0012] Preferably, the inner limiting member consists of a circular support block and a limiting post with an elastic telescopic structure, and the fixed section of the limiting post runs vertically through and is fixedly installed on the lower frame, the support block is fixedly fitted on the fixed section of the limiting post and is located above the lower frame; the upper end face of the bottom support is located above the upper end face of the support block.

[0013] Preferably, the welding fixture further includes: an upper pressure part, which is linearly slidably mounted on the rotating table and located above the middle limit part; after the base plate is placed on the support, the upper pressure part applies multi-directional inclined pressure to the base plate, and uses component force to keep the base plate and each side plate pressed tightly; after the rotating table rotates 180°, the lower support part moves away from the side plate, and at this time the upper pressure part supports the base plate.

[0014] Preferably, the upper pressing part includes a plurality of rectangularly distributed pressure rollers, which are rotatably mounted on the lower end of the inclined plate, and the upper end of the inclined plate is elastically and hingedly connected to the lower end of the driving assembly.

[0015] The beneficial effects of this invention are as follows: 1. This invention uses an inner and outer limiting component to form a fixed loop-shaped placement area with inner and outer limiting and bottom support functions. By utilizing the multi-directional linkage limiting of the fixed loop-shaped placement area, the telescopic rod, and the pressing component, the side plate and the bottom plate can be automatically centered, placed in one go, and stably pressed. The limiting component does not need to dynamically avoid the multi-dimensional welding robot, which simplifies the control logic, avoids the displacement risk caused by dynamic adjustment, and ensures that the limiting component, the side plate, and the bottom plate are in a continuous and stable state throughout the welding process. Moreover, it does not require high-precision sensors and dynamic adjustment components, and the structure is simple, convenient, and intuitive to operate.

[0016] 2. Based on multi-directional linkage limiting, this invention ensures that all welds between the side plate, bottom plate, and ear piece are fully exposed during welding, eliminating the need to repeatedly adjust the limiting unit to avoid the robot arm. This enables continuous welding, and the unobstructed welds reduce the risk of missed welds or incomplete welds. Simultaneously, by rotating the table 180°, welding preparation for both sides of the weld can be completed in one go without re-clamping. Through the optimized structure of flipping fixtures that do not require re-clamping and full exposure of welds under multi-directional continuous limiting, this invention significantly improves welding efficiency and quality while retaining the advantages of automation, making it more suitable for small and medium-sized enterprises.

[0017] 3. This invention achieves rapid and accurate positioning of the side plate and the bottom plate by combining the loop placement area with the automatic centering function of the telescopic rod, ensuring that the side plate and the bottom plate are always in the preset position and the relative position of the side plate and the bottom plate is accurate. Moreover, only the rotation of the outer limit component is needed to complete the pressing or releasing, without the need for an additional power source, reducing manual intervention, thereby improving welding efficiency and welding quality.

[0018] 4. This invention integrates the placement, positioning, pressing, and welding of side plates and bottom plates into the same workstation, reducing process steps and improving the overall production pace. It also achieves automatic centering, limiting, pressing, and pressing, significantly reducing manual intervention. Through a simple structure and conventional drive, it improves the degree of automation and welding clamping and limiting effect, while also reducing equipment costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure when the outer limiting member and the inner limiting member cooperate to limit and support the side plate in this invention.

[0021] Figure 3 yes Figure 2 An explosion diagram.

[0022] Figure 4 This is a structural schematic diagram of the outer limiting member and the pressing integrated member in this invention.

[0023] Figure 5 This is a schematic diagram of the driving component in this invention.

[0024] Figure 6 This is a schematic diagram of the structure in this invention where the limiting post limits the side plate when the base plate is not placed.

[0025] Figure 7 This is a schematic diagram of the structure of the limiting column in this invention when it is compressed by the base plate but still maintains its limiting position.

[0026] Figure 8 This is a schematic diagram of the structure of the telescopic rod in this invention when it is compressed by the side plate and retracts.

[0027] Figure 9 This is a structural schematic diagram of the position limiting component in this invention.

[0028] Figure 10 This is a schematic diagram of the battery tray structure.

[0029] In the diagram: 1. Rotating table; 2. Middle limit part; 3. Lower support part; 4. Upper pressing part; 5. Side plate; 6. Base plate; 7. Position limiting component; 20. Outer limiting component; 21. Pressing component; 22. Rectangular frame; 23. Auxiliary limiting component; 24. Pressing integrated component; 25. Driving component; 201. Frustum; 202. Guide column; 240. Cylinder; 241. Pressing block; 242. Elastic telescopic plate; 30. Support component; 31. Inner limiting component; 32. Telescopic rod; 301. Lower frame; 302. Base support; 310. Support block; 311. Limiting column; 40. Pressure roller; 41. Inclined plate; 7. Position limiting component; 70. Z-shaped plate; 71. Insert rod. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Please see Figure 1 and Figure 10 A precision welding fixture for manufacturing battery trays, used in conjunction with a multi-dimensional welding robot and a rotating table 1, wherein the multi-dimensional welding robot can be symmetrically arranged on the left and right sides of the rotating table 1. Figure 1 The image shows only one side of the multi-dimensional welding robot. Alternatively, for cost considerations, only one side of the multi-dimensional welding robot can be provided. At the same time, the rotating table 1 itself can rotate around the vertical axis so that a single multi-dimensional welding robot can complete the overall welding operation. The rotating table 1 is existing technology, which mainly consists of a control part, a U-shaped body, and rotating bodies that are rotatably installed at opposite ends of two parallel sections of the U-shaped body. The welding fixture includes a middle limit part 2, a lower support part 3, and an upper pressure part 4 provided on the rotating table 1. The upper pressure part 4, the middle limit part 2, and the lower support part 3 are distributed sequentially from top to bottom.

[0032] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 The middle limiting part 2 includes several rotatably arranged outer limiting members 20 and pressing members 21 disposed on the outer limiting members 20. The outer limiting member 20 consists of a frustum 201 and a guide post 202. The upper end of the guide post 202 is frustum-shaped, which facilitates the smooth placement of the side plate 5. The guide post 202 is fixedly installed on the upper end of the frustum 201. The frustum 201 is rotatably installed on the loop frame 22 and passes through the loop frame 22 vertically. The loop frame 22 is fixedly installed between the rotating bodies. The pressing member 21 is a semi-circular plate, which is fixedly installed on the outer ring wall of the guide post 202 at a non-sloping position. To improve the structural strength of the semi-circular plate, a reinforcing rib is fixedly installed between the upper end of the semi-circular plate and the outer ring wall of the guide post 202.

[0033] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6The lower support 3 includes a linearly sliding support 30, an inner limiting member 31 that is a telescopic structure, and multiple pairs of telescopic rods 32. The inner limiting members 31 are numerous and mounted on the support 30. The outer limiting members 20 and the inner limiting members 31 are evenly distributed along a loop-shaped trajectory, forming a loop-shaped placement area that provides inner and outer limits and bottom support for the side plates 5. This fixed loop-shaped placement area provides a stable reference frame. The telescopic rods 32 are fixedly installed on the support 30 and correspond to the corners of the loop-shaped trajectory; that is, a pair of telescopic rods 32 are provided between two adjacent side plates 5 corresponding to the loop-shaped trajectory sides, and the telescopic rods 32 are located in the loop-shaped placement area. The support 30 consists of a loop-shaped lower frame 301 and a base support 302 installed in the middle of the lower frame 301 via connecting ribs. The base support 302, the lower frame 301, and the connecting ribs form a truncated pyramid structure. The base support 302 supports the lower end of the base plate 6. The lower frame 301 and the loop-shaped frame 22 are vertically opposite each other (e.g., ...). Figure 6 As shown, the base 302 is connected to the rotating body through a drive component; the fixed section of the telescopic rod 32 runs vertically through and is fixedly installed on the lower frame 301.

[0034] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 The inner limiting member 31 consists of a circular support block 310 and a limiting post 311 with an elastic telescopic structure. The upper end of the limiting post 311 is also frustoconical. The frustoconical shape facilitates the smooth placement of the side plate 5. The fixed section of the limiting post 311 runs vertically through and is fixedly installed on the lower frame 301. The support block 310 is fixedly fitted on the fixed section of the limiting post 311 and is located above the lower frame 301. The upper end face of the bottom support 302 is located above the upper end face of the support block 310. The inner limiting member 31 located at the corner of the lower frame 301 corresponds to a pair of telescopic rods 32, and the pair of telescopic rods 32 are symmetrically arranged about the inner limiting member 31.

[0035] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6The upper pressing part 4 includes several rectangularly distributed pressure rollers 40, which are rotatably mounted on the lower end of the inclined plate 41. The upper end of the inclined plate 41 is elastically and hingedly connected to the lower end of the drive assembly. The drive assembly consists of a drive part and a hanging plate. The inclined plate 41 is hinged to the lower end of the hanging plate, and the hinged part is connected to a torsion spring. The drive part and the drive component connected to the base 302 have the same structure. Specifically, the drive part includes a cylinder, several guide columns, and U-shaped frames. The openings of the two U-shaped frames are opposite each other and are fixedly installed between the two rotating bodies. The guide columns are slidably connected to the corresponding U-shaped frames. The cylinder is fixedly connected to the corresponding U-shaped frame. The upper end of the hanging plate is fixedly connected to the pushing end of the corresponding cylinder. The lower end of the base 302 is fixedly connected to the pushing end of the corresponding cylinder.

[0036] Please see Figures 2 to 8 During initial operation, the upper pressing part 4 is on top and the lower supporting part 3 is on the bottom, with the upper pressing part 4 far away from the middle limiting part 2. The lower supporting part 3 cooperates with the middle limiting part 2. At this time, the inner limiting part 31 and the bottom support 302 are both located inside the loop frame 22 (that is, the inner limiting part 31 is located on the side of the outer limiting part 20 near the middle of the loop frame 22). The upper end face of the frustum 201 in the outer limiting part 20 and the upper end face of the support block 310 in the inner limiting part 31 are flush. The guide post 202 in the outer limiting part 20 and the limiting post 311 in the inner limiting part 31 form a loop placement area. Several frustums 201 in the outer limiting part 20 and the support block 310 together form a loop bottom support surface. The limiting post 311 and the telescopic rod 32 are both in a natural state.

[0037] Then, the operator places the side plates 5 (i.e., the long side plates 5) corresponding to the sides of the loop-shaped placement area from top to bottom into the loop-shaped placement area. During placement, the long side plates 5 will be immediately limited internally and externally and their positions will be restricted by the loop-shaped placement area. At the same time, the telescopic rods 32 located on both sides of the long side plate 5 along its length form a central limiting area (e.g., Figure 2 , Figure 3 As shown), when the long side plate 5 is lowered into the U-shaped placement area along the centering limit zone, it will immediately complete the position centering correction, realizing one-time placement, automatic centering and limit operation. It also facilitates the subsequent rapid placement of the side plate 5 at the corner of the corresponding U-shaped placement area (i.e., the short side plate 5). No high-precision sensors and dynamic adjustment components are required, the structure is simple, and the operation is convenient and intuitive. After the long side plate 5 is placed, the short side plate 5 is placed. During placement, the short side plate 5 will also be immediately limited internally and externally and its position will be restricted under the action of the U-shaped placement area. At the same time, it will gradually compress the corresponding pair of telescopic rods 32 (e.g., Figure 8 As shown), the four long side plates 5 and the four short side plates 5 are finally in close contact to form a frame (as shown). Figure 10As shown), the frame is in the state of being limited by the inner and outer sides of the U-shaped placement area and supported by the U-shaped bottom support surface. At this time, the upper surface of the bottom support 302 is located below the upper surface of the frame, and the distance between the upper surfaces of the two is the thickness of the bottom plate 6. The upper and outer welds between the long side plate 5 and the short side plate 5 are fully exposed.

[0038] Next, the base plate 6 is placed on the base support 302. During this process, the base plate 6 will press down on the limiting post 311 to cause it to retract (e.g., Figure 7 As shown in the diagram, the outer side of the base plate 6 finally contacts the inner side of the side plate 5, and the upper end face is flush with the upper end face of the side plate 5, exposing the weld seam on one side of the contact end between the base plate 6 and the side plate 5. However, because the lower end face of the base plate 6 is located above the lower end face of the frame, the limiting post 311 still internally limits the side plate 5 at this time. It should be noted that the limiting post 311 remains in a retracted state under the gravity of the base plate 6 and the telescopic rod 32 remains in a retracted state under the gravity of the short-sized side plate 5.

[0039] Subsequently, the corresponding cylinders cause the hanging plate to move several pressure rollers 40 vertically downwards synchronously. When the pressure rollers 40 continue to move downwards after contacting the bottom plate 6, the inclined plate 41 deflects, and the pressure rollers 40 roll along the bottom plate 6. The pressure rollers 40 and the inclined plate 41 together exert multi-directional inclined pressure on the bottom plate 6, using component forces to keep the bottom plate 6 continuously pressed against each side plate 5, and pressing the bottom plate 6 onto the base support 302. Then, the frustums 201 in several outer limiting members 20 rotate synchronously. The frustums 201 drive the pressing member 21 to rotate through the guide post 202, and finally the pressing member... 21 is pressed onto the upper end of the corresponding side plate 5. At this point, both the frame and the base plate 6 are in a stable state with multi-directional limiting. The pressing of the pressing part 21 will not obstruct the weld between the side plate 5 and the base plate 6. Next, the multi-dimensional welding robot will weld the weld on one side of the contact end between the base plate 6 and the side plate 5, as well as the upper and outer welds between the side plates 5. During this process, the rotating table 1 will control the middle limiting part 2, the lower support part 3, and the upper pressing part 4 to deflect together to adapt to the welding operation of the multi-dimensional welding robot, so as to ensure that the multi-dimensional welding robot completes the welding operation of the entire weld.

[0040] It should be noted that the pressure roller 40 is parallel to the corresponding long side plate 5, and the distance between the pressure roller 40 and the corresponding long side plate 5, the distance between the vertical section of the U-shaped frame and the corresponding long side plate 5, and the distance between the horizontal section of the U-shaped frame and the upper end of the corresponding long side plate 5 are all sufficient for the multi-dimensional welding robot to perform welding operations.

[0041] After the welding operations of one side weld at the contact end of the base plate 6 and the side plate 5, and the upper and outer welds between the side plates 5 are completed, the welding end of the multi-dimensional welding robot moves to the right side of the rotating table 1. Then, the rotating table 1 controls the middle limit part 2, the lower support part 3, and the upper pressure part 4 to rotate 180° as a whole. At this time, the upper pressure part 4 is at the bottom and the lower support part 3 is at the top. Then, the driving component causes the base support 302, the lower frame 301, the inner limit part 31, and the telescopic rod 32 to move upward to the maximum displacement position as a whole. The upper pressure part 4 then assumes the role of supporting the base plate 6 and pressing it down. The bottom support of component 21 supports the side plate 5, while the frustum 201 in the outer limiting component 20 acts to press down on the side plate 5. The outer limiting component 20 still maintains the limitation on the side plate 5. Since the side plates 5 are initially welded together and connected to the bottom plate 6, the outer limiting component 21, the bottom support of the pressing component 21, and the frustum 201 in the outer limiting component 20 can keep the side plate 5 and the bottom plate 6 in their current stable position. There is no need to re-clamp or adjust the limiting components. Welding on both sides is completed in the same tooling, improving efficiency and shortening the operation steps. Then, a multi-dimensional welding robot is used to weld the weld seam on the other side of the contact end between the bottom plate 6 and the side plate 5, as well as the lower and inner weld seams between the side plates 5.

[0042] The combination of the pressing part, the middle limiting part 2 and the lower supporting part 3 ensures that the side plate 5 and the bottom plate 6 are in a stable state of multi-directional limiting throughout the welding process of the weld seam in all directions. The limiting parts do not obstruct the weld seam and do not need to dynamically avoid the multi-dimensional welding robot. They can always maintain the current limiting position and avoid the possibility that the side plate 5 and the bottom plate 6 may have micro-displacement during the welding process due to dynamic limiting, which would affect the welding accuracy. At the same time, continuous welding is achieved, especially for long-distance single weld seams.

[0043] Please see Figure 2 , Figure 3 , Figure 4 and Figure 5 This invention, based on the one-time placement, automatic centering, and limiting operation of the side plate 5, further achieves simultaneous limiting and fixing of the ear pieces by adding an auxiliary limiting component 23 and a pressing integrated component 24. This concentrates the separate operations of placing and welding the side plate 5 and the base plate 6, and placing and welding the ear pieces, into a single process, reducing the overall welding operation steps of the battery tray. Specifically: the middle limiting part 2 also includes an auxiliary limiting component 23 and a pressing integrated component 24. The auxiliary limiting component 23 is used to limit and support the ear pieces to be welded on the outer side of the side plate 5, and the pressing integrated component 24 is used to press and elastically tighten the ear pieces. The auxiliary limiting component 23 has the same structure as the outer limiting component 20 and is evenly distributed along a loop trajectory with the outer limiting component 20. However, the frustum 201 in the auxiliary limiting component 23 is fixedly connected to the loop frame 22; the number of auxiliary limiting components 23 is the same as the number of ear pieces to be welded, such as... Figure 2As shown, the circular frame 22 has two auxiliary limiting members 23 on both the left and right sides, and one auxiliary limiting member 23 in the middle of both the front and rear sides. The pressing and abutting integrated component 24 includes a cylinder 240 rotatably mounted on the circular frame 22. The cylinder 240 is located on the side of the corresponding auxiliary limiting member 23 away from the middle of the circular frame 22. The outer ring wall of the truncated cone 201 is equipped with a pressing block 241 for pressing the ear piece from above, and an elastic telescopic plate 242 for providing inward abutting force to the ear piece while pressing it. The elastic telescopic plate 242 is located between the pressing block 241 and the upper end of the circular frame 22, and the telescopic section end of the elastic telescopic plate 242 is rounded. The lower end of the semicircular plate and the pressing block 241 are both provided with an outward convex arc surface. The purpose of providing the outward convex arc surface is to improve the smoothness of the rotation of the semicircular plate and the pressing block 241 during the process of the semicircular plate rotating to press the side plate 5 and the pressing block 241 rotating to press the ear piece. The frustum 201 of several cylinders 240 and several outer limiting members 20 is uniformly driven by a driving member 25 located at the lower end of the rotating frame 22; the driving member 25 includes a sprocket fixedly mounted at the lower end of the frustum 201 and a chain belt that drives the sprockets together, and the lower end of one of the cylinders 240 is fixedly connected to the output shaft of a motor fixedly installed at the lower end of the rotating body.

[0044] After the long side plate 5 is placed, the ear piece is placed from top to bottom on the upper end of the frustum 201 in the auxiliary limiting member 23. The guide post 202 in the auxiliary limiting member 23 passes through the mounting hole on the ear piece, and the ear piece abuts against the outer side surface of the corresponding long side plate 5. At this time, the ear piece is located between the corresponding cylinder 240 and the long side plate 5. When the frustum 201 in several outer limiting members 20 is rotated by the motor, sprocket, and chain belt, the cylinder 240 also rotates synchronously. The frustum 201 of the corresponding outer limiting member 20 drives the pressing member 21 to rotate through the guide post 202 to press the upper end of the side plate 5. The cylinder 240 rotates the pressure block 241 to press the upper end of the ear piece, while the cylinder 240 also rotates the elastic telescopic plate 242. Finally, the telescopic end of the elastic telescopic plate 242 presses against the side of the ear piece away from the corresponding long side plate 5, and the elastic telescopic plate 242 is in a contracted state. The contracted elastic telescopic plate 242 gives the ear piece a pressing force to press against the corresponding long side plate 5. At this time, the horizontal weld and the two vertical welds on the upper side of the ear piece are fully exposed. The welding operations of the corresponding welds between the side plates 5, between the side plates 5 and the bottom plate 6, and between the ear piece and the side plates 5 can be completed in the same step. After all the welds between the side plate 5, the bottom plate 6, and the ear pieces are completed, the lower support 3 moves towards the bottom plate 6 and resets. Then, the rotating table 1 controls the middle limit part 2, the lower support part 3, and the upper pressure part 4 to rotate 180° as a whole. Then, the pressure of the upper pressure part 4 on the bottom plate 6, the pressure of the pressure block 241 on the ear pieces, and the pressure of the pressure piece 21 on the side plate 5 are released. The upper pressure part 4, the pressure block 241, and the pressure piece 21 all return to their initial positions, and the welded battery tray can be taken up and removed.

[0045] It should be noted that the placement of the ear piece and the placement of the short side plate 5 do not interfere with each other, so they can be carried out simultaneously or asynchronously depending on the actual situation.

[0046] Please see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 9 and Figure 10 To further enhance the practicality of the welding fixture, based on the above design that completes the positioning and assembly of the side plate 5, base plate 6, and ear pieces in one go, a detachable position limiting component 7 is added for cases where several spacers need to be welded and installed on the base plate 6 to form several battery mounting areas. After the above welding operation is completed, the position limiting component 7 can be used to determine the welding position of the spacers in a timely and quick manner, and ensure that the spacers remain stable during welding. Specifically, the position limiting component 7 includes a hanging plate, multiple sets of Z-shaped plates 70, and insert rods 71. Each set of Z-shaped plates 70 includes two Z-shaped plates 70, which are fixedly connected to the hanging plate. Insert rods 71 ​​are threadedly installed at the lower ends of the two cylinders 240 on one side of the rotating frame 22. When the rotating table 1 rotates 180° and the lower support 3 moves away from the side plate 5, the hanging plate is snapped between the insert rods 71 ​​(e.g., Figure 9 As shown), at this time, the horizontal section of the lower side of the Z-shaped plate 70 abuts against the bottom plate 6, and the vertical section abuts against the inner side of the side plate 5. The area between the two Z-shaped plates 70 in the same group is the installation position of the spacer. Then the spacer is installed. It should be noted that the welding work between the bottom plate 6 and the side plate 5, and between the side plates 5, has been completed before the spacer is installed. Then the welding work between the spacer and the bottom plate 6 and the side plate 5 is carried out. When the spacer is about to be welded to the position close to the Z-shaped plate 70, the multi-dimensional welding robot pauses the welding and then removes the position limiting part 7 directly. Then the welding continues. After the welding is completed, the lower support part 3 is moved towards the bottom plate 6 to reset. Then the rotating table 1 controls the control of the middle limiting part 2, the lower support part 3, and the upper pressing part 4 to rotate 180° as a whole. Then the pressure of the upper pressing part 4 on the bottom plate 6, the pressure of the pressing block 241 on the ear piece, and the pressure of the pressing part 21 on the side plate 5 are released. Finally, the welded battery tray can be taken up.

[0047] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A precision welding fixture for manufacturing battery trays, used in conjunction with a multi-dimensional welding robot and a rotating table, characterized in that, This includes the middle limit section and the lower support section set on the rotating platform; The middle limit includes: External limiting components, in several quantities and with a rotating design; The pressing component is located on the outer limiting component; The lower support includes: Support components with linear sliding configuration; The inner limiting component of the telescopic structure is several in number and is set on the supporting component; the outer limiting component and the inner limiting component are evenly distributed along the loop trajectory, and the whole constitutes a loop placement area that provides inner and outer limiting of the side plate and bottom support. Multiple pairs of telescopic rods are installed on the support and correspond to the corners of the loop track; the telescopic rods are used to automatically center the side plate of the corresponding loop track side; when the side plate of the corresponding loop track corner is placed, the telescopic rods are compressed and retracted. When the base plate is placed on the support and the outer side of the base plate abuts against the inner side of the side plate, the inner limiting member retracts but still performs inner limiting and bottom support. Then the outer limiting member rotates to make the pressing member press the side plate. The weld seam on one side of the contact end between the base plate and the side plate, as well as the upper and outer weld seams between the side plates, are fully exposed. After the rotating table rotates 180°, the lower support moves away from the side plate, but the side plate is still limited by the outer and upper and lower limits. The weld on the other side of the contact end between the bottom plate and the side plate, as well as the lower and inner welds between the side plates, are fully exposed. Welding fixtures also include: The upper pressure section is linearly slidably mounted on the rotating platform and located above the middle limit section; After the base plate is placed on the support, the upper pressing part applies multi-directional inclined pressure to the base plate, using component force to keep the base plate and each side plate pressed tightly together; after the rotating table rotates 180°, the lower support part moves away from the side plates, at which point the upper pressing part supports the base plate.

2. The precision welding fixture for manufacturing a battery tray according to claim 1, characterized in that: The outer limiting component consists of a frustum and a guide post. The guide post is fixedly installed on the upper end of the frustum, the frustum is rotatably installed on the spiral frame, and the spiral frame is fixedly installed on the rotating platform.

3. The precision welding fixture for manufacturing a battery tray according to claim 2, characterized in that: The pressing component is a semi-circular plate, which is fixedly installed on the outer ring wall of the guide post at a non-sloping position.

4. The precision welding fixture for manufacturing a battery tray according to claim 2, characterized in that: The intermediate limit portion also includes: Auxiliary limiting components are used to limit and support the lugs to be welded on the outer side of the side plate; The pressure-bearing integrated component is used to press and elastically tighten the lugs; the auxiliary limiting component has the same structure as the outer limiting component, but the frustum in the auxiliary limiting component is fixedly connected to the U-shaped frame.

5. The precision welding fixture for manufacturing a battery tray according to claim 4, characterized in that: The pressing and pressing integrated component includes a cylinder rotatably mounted on a circular frame. The cylinder is located on the side of the corresponding auxiliary limiting component away from the center of the circular frame. The outer ring wall of the truncated cone is equipped with a pressing block for pressing the ear piece from above and an elastic telescopic plate for providing inward pressing force to the ear piece while pressing it.

6. The precision welding fixture for manufacturing a battery tray according to claim 5, characterized in that: The frustums among the cylinders and the outer limiting components are driven by a driving component located at the lower end of the spiral frame.

7. The precision welding fixture for manufacturing a battery tray according to claim 1, characterized in that: The support consists of a U-shaped lower frame and a base bracket installed in the middle of the lower frame via connecting ribs. The base bracket is connected to the rotating table via a drive component. The fixed section of the telescopic rod runs vertically through the lower frame and is fixedly installed on it.

8. The precision welding fixture for manufacturing a battery tray according to claim 7, characterized in that: The inner limiting component consists of a circular support block and a limiting post with an elastic telescopic structure. The fixed section of the limiting post runs vertically through the lower frame and is fixedly installed on it. The support block is fixedly fitted onto the fixed section of the limiting post and is located above the lower frame. The upper end face of the bottom support is located above the upper end face of the support block.

9. The precision welding fixture for manufacturing a battery tray according to claim 1, characterized in that: The upper pressing part includes several rectangularly distributed pressure rollers, which are rotatably mounted on the lower end of the inclined plate. The upper end of the inclined plate is elastically and hingedly connected to the lower end of the drive assembly.

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