A welding fixture for a battery holder

Abstract

The utility model provides a kind of welding fixture for battery support, including fixed base, weld adjusting mechanism, two clamping pedestals, two rigid clamping mechanisms and two flexible pressing mechanisms;Two clamping pedestals are symmetrically arranged above the fixed base, and each clamping pedestal is slidably connected with the fixed base by a guide structure;The weld adjusting mechanism is used to adjust the distance between the two fixed bases;A rigid clamping mechanism and a flexible pressing mechanism are correspondingly arranged above each clamping pedestal.The welding fixture for battery support solves the problem that the design reference of the workpiece does not coincide with the fixture positioning reference in related technology, resulting in systematic deviation, which leads to excessive local clamping force, causing workpiece deformation, or insufficient clamping stability.

Description

Technical Field

[0001] This utility model belongs to the field of battery bracket technology, and in particular relates to a welding fixture for battery brackets. Background Technology

[0002] Welding fixtures for battery brackets are precision process equipment primarily used to accurately position the battery casing or bracket base and the bracket component to be welded during the welding process. This ensures a stable relative position between the two during welding, thereby improving welding accuracy and product consistency. Depending on the welding scenario, mechanical locking components drive pressure blocks to lock the battery bracket. During welding, localized high temperatures cause the workpiece to expand, and upon cooling, it contracts. Because the workpiece's design datum does not coincide with the fixture's positioning datum in related technologies, a systematic deviation occurs, leading to problems such as excessive local clamping force causing workpiece deformation, and insufficient clamping force resulting in unstable clamping. Summary of the Invention

[0003] In view of this, the present invention aims to at least partially solve one of the related technical problems.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A welding fixture for a battery holder includes a fixed base, a weld adjustment mechanism, two clamping bases, two rigid clamping mechanisms, and two flexible clamping mechanisms.

[0006] Two clamping bases are symmetrically arranged above the fixed base, and each clamping base is slidably engaged with the fixed base through a guide structure;

[0007] The weld adjustment mechanism is used to adjust the distance between the two fixed bases;

[0008] Each of the clamping bases is provided with a rigid clamping mechanism and a flexible pressing mechanism. The flexible pressing mechanism is located at the outer end of the clamping base, and the rigid clamping mechanism is located inside the flexible pressing mechanism. The rigid clamping mechanism is used to clamp the inner wall of the battery bracket, and the flexible pressing mechanism is used to press the outer wall of the battery bracket.

[0009] Furthermore, the rigid clamping mechanism includes a tightening screw, a screwing block, a support base, an internal clamping block, and two side positioning plates. The two side positioning plates are symmetrically arranged at the outer ends of the clamping base. The internal clamping block is provided at one end of the tightening screw, and the screwing block is provided at the other end of the tightening screw. The support base is provided on the upper surface of the clamping base. The tightening screw is threadedly engaged with the support base. The side positioning plates are used to limit the outer wall of the battery holder, and the internal clamping block is used to tighten the inside of the battery holder.

[0010] Furthermore, the flexible clamping mechanism includes an external clamping block, a fixed plate, a clamping screw, and a clamping spring. One end of the clamping base is provided with a slot for placing the external clamping block. The bottom of the external clamping block is slidably engaged with the clamping screw. One end of the clamping screw is provided with a limiting block, and the other end of the clamping screw is threadedly connected to the fixed plate. The fixed plate is integrally connected to the lower end face of the clamping base. The upper part of the external clamping block is the clamping end, which is directly opposite to the two side positioning plates. One end of the clamping spring abuts against the external clamping block, and the other end of the clamping spring abuts against the limiting block. The clamping spring is sleeved on the clamping screw.

[0011] Furthermore, the clamping end of the external clamping block is provided with a rubber block.

[0012] Furthermore, the weld adjustment mechanism includes an adjustment prism, two adjustment plates, and two adjustment screws. Each of the clamping bases has an adjustment plate corresponding to its lower end face. The two adjustment screws are symmetrically arranged on the left and right end faces of the adjustment prism. The threads of the two adjustment screws have opposite directions, and each adjustment screw is threadedly engaged with one of the adjustment plates.

[0013] Furthermore, the guide structure includes two guide components, which are symmetrically arranged on the upper surface of the fixed base, and each guide component is slidably engaged with the adjustment plate.

[0014] Furthermore, the two side positioning plates are arranged symmetrically at a 45° angle with the workpiece's center line as a reference; the side of the internal clamping block is machined into a 45° inclined surface, which is parallel to the inner surface of the side positioning plate.

[0015] Furthermore, a mounting plate is provided on each of the left and right end faces of the fixed base.

[0016] Compared with the prior art, the welding fixture for battery holders described in this utility model has the following advantages:

[0017] 1. The rigid clamping mechanism, through the side positioning plate and internal clamping block, provides precise radial reference positioning for the battery bracket, effectively resisting lateral impact forces during welding and preventing circumferential displacement of the workpiece. The flexible clamping mechanism utilizes the elastic deformation characteristics of the clamping spring to allow a slight axial displacement of the battery bracket when it expands due to heat while applying a constant clamping force, eliminating the risk of plastic deformation caused by thermal stress concentration. The combination of the two forms a synergistic mechanism of "rigid positioning + flexible buffering," which ensures the positional stability of the workpiece during welding and avoids micro-cracks or indentation damage caused by local over-clamping.

[0018] 2. When welding heat input causes fluctuations in the battery bracket dimensions, the spring extension and retraction of the flexible clamping mechanism automatically compensates for changes in workpiece thickness, continuously maintaining optimal clamping force. The rubber contact block further isolates the hard metal contact between the fixture and the workpiece, absorbs high-frequency welding vibrations, and protects the integrity of the coating on the surface of the battery bracket. The rigid clamping inner wall pressing and the flexible clamping outer wall wrapping form a two-way mechanical constraint, suppressing the shrinkage deformation of the battery bracket during the solidification stage of the weld pool and ensuring the alignment accuracy of the weld. During the cooling process after welding, the flexible clamping mechanism rebounds synchronously with the shrinkage of the workpiece, avoiding residual stress caused by the untimely release of constraints in traditional rigid fixtures. Attached Figure Description

[0019] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0020] Figure 1 This is a schematic diagram of a welding fixture for a battery holder according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the flexible clamping mechanism described in an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the rigid clamping mechanism described in an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the weld adjustment mechanism described in an embodiment of the present utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100. Fixed base; 110. Mounting plate; 200. Guide assembly; 300. Weld adjustment mechanism; 400. Clamping base; 410. Fixed plate; 420. Adjusting plate; 500. Flexible clamping mechanism; 510. External clamping block; 520. Rubber block; 530. Limiting block; 540. Compression spring; 600. Rigid clamping mechanism; 610. Tightening screw; 620. Internal clamping block; 630. Side positioning plate; 640. Support base. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] A welding fixture for battery holders, such as Figure 1 As shown, it includes a fixed base 100, a weld adjustment mechanism 300, two clamping bases 400, two rigid clamping mechanisms 600, and two flexible pressing mechanisms 500; the two clamping bases 400 are symmetrically arranged above the fixed base 100, and each clamping base 400 slides with the fixed base 100 through a guide structure; the weld adjustment mechanism 300 is used to adjust the distance between the two fixed bases 100; a mounting plate 110 is provided on each of the left and right end faces of the fixed base 100.

[0031] Each clamping base 400 is provided with a rigid clamping mechanism 600 and a flexible pressing mechanism 500. The flexible pressing mechanism 500 is located at the outer end of the clamping base 400, and the rigid clamping mechanism 600 is located inside the flexible pressing mechanism 500. The rigid clamping mechanism 600 is used to clamp the inner wall of the battery bracket, and the flexible pressing mechanism 500 is used to press the outer wall of the battery bracket.

[0032] like Figure 2As shown, the rigid clamping mechanism 600 includes a tightening screw 610, a screwing block, a support base 640, an internal clamping block 620, and two side positioning plates 630. The two side positioning plates 630 are symmetrically arranged at the outer ends of the clamping base 400. One end of the tightening screw 610 is provided with the internal clamping block 620, and the other end of the tightening screw 610 is provided with the screwing block. The support base 640 is provided on the upper surface of the clamping base 400. The tightening screw 610 is threadedly engaged with the support base 640. The side positioning plates 630 are used to limit the outer wall of the battery holder, and the internal clamping block 620 is used to tighten the inside of the battery holder. The two side positioning plates 630 are arranged symmetrically at a 45° angle with the workpiece's center line of symmetry as a reference. The side edge of the internal clamping block 620 is machined into a 45° inclined surface, which is parallel to the inner surface of the side positioning plate. The rigid clamping mechanism 600, through the side positioning plate 630 and the internal clamping block 620, provides precise radial reference positioning for the battery bracket, effectively resisting lateral impact forces during welding and preventing circumferential displacement of the workpiece. The flexible clamping mechanism 500 utilizes the elastic deformation characteristics of the clamping spring 540 to allow a slight axial displacement of the battery bracket when it expands due to heat while applying a constant clamping force, eliminating the risk of plastic deformation caused by thermal stress concentration. The combination of the two forms a synergistic mechanism of "rigid positioning + flexible buffering," which ensures the positional stability of the workpiece during welding and avoids micro-cracks or indentation damage caused by local over-clamping.

[0033] The flexible clamping mechanism 500 includes an external clamping block 510, a fixing plate 410, a clamping screw, and a clamping spring 540. One end of the clamping base 400 has a slot for placing the external clamping block 510. The bottom of the external clamping block 510 slides in conjunction with the clamping screw. One end of the clamping screw has a limiting block 530, and the other end is threaded to the fixing plate 410. The fixing plate 410 is integrally connected to the lower end face of the clamping base 400. The upper part of the external clamping block 510 is the clamping end, which is directly opposite to the two side positioning plates 630. One end of the clamping spring 540 abuts against the external clamping block 510, and the other end abuts against the limiting block 530. The clamping spring 540 is sleeved on the clamping screw. The clamping end of the external clamping block 510 has a rubber block 520. When welding heat input causes fluctuations in the dimensions of the battery bracket, the spring extension and retraction of the flexible clamping mechanism 500 automatically compensates for changes in workpiece thickness, continuously maintaining optimal clamping force. The rubber contact block further isolates the hard metal contact between the fixture and the workpiece, absorbs high-frequency welding vibrations, and protects the integrity of the coating on the surface of the battery bracket. The inner wall of the rigid clamping and the outer wall of the flexible clamping form a two-way mechanical constraint, suppressing the shrinkage deformation of the battery bracket during the solidification stage of the weld pool and ensuring the alignment accuracy of the weld. During the cooling process after welding, the flexible clamping mechanism 500 rebounds synchronously with the shrinkage of the workpiece, avoiding residual stress caused by the untimely release of constraints in traditional rigid fixtures.

[0034] like Figure 3 As shown, the weld adjustment mechanism 300 includes an adjustment prism, two adjustment plates 420 and two adjustment screws. Each clamping base 400 has an adjustment plate 420 correspondingly arranged on its lower end face. The two adjustment screws are symmetrically arranged on the left and right end faces of the adjustment prism. The threads of the two adjustment screws are opposite in direction, and each adjustment screw is threadedly engaged with an adjustment plate 420.

[0035] The guide structure includes two guide components 200, which are symmetrically arranged on the upper surface of the fixed base 100. Each guide component 200 is slidably engaged with the adjusting plate 420. The guide component consists of an existing guide rod and two mounting seats. The guide rod is slidably engaged with the adjusting plate 420.

[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A welding fixture for a battery holder, characterized in that: It includes a fixed base (100), a weld adjustment mechanism (300), two clamping bases (400), two rigid clamping mechanisms (600) and two flexible clamping mechanisms (500); Two clamping bases (400) are symmetrically arranged above the fixed base (100), and each clamping base (400) slides in cooperation with the fixed base (100) through a guide structure; The weld adjustment mechanism (300) is used to adjust the distance between the two fixed bases (100); Each clamping base (400) is provided with a corresponding rigid clamping mechanism (600) and a flexible pressing mechanism (500). The flexible pressing mechanism (500) is located at the outer end of the clamping base (400), and the rigid clamping mechanism (600) is located inside the flexible pressing mechanism (500). The rigid clamping mechanism (600) is used to clamp the inner wall of the battery holder, and the flexible pressing mechanism (500) is used to press the outer wall of the battery holder.

2. The welding fixture for a battery holder according to claim 1, characterized in that: The rigid clamping mechanism (600) includes a tightening screw (610), a screwing block, a support base (640), an internal clamping block (620), and two side positioning plates (630). The two side positioning plates (630) are symmetrically arranged at the outer ends of the clamping base (400). The internal clamping block (620) is provided at one end of the tightening screw (610), and the screwing block is provided at the other end of the tightening screw (610). The support base (640) is provided on the upper surface of the clamping base (400). The tightening screw (610) is threadedly engaged with the support base (640). The side positioning plates (630) are used to limit the outer wall of the battery holder, and the internal clamping block (620) is used to tighten the inside of the battery holder.

3. A welding fixture for a battery holder according to claim 2, characterized in that: The flexible clamping mechanism (500) includes an external clamping block (510), a fixing plate (410), a clamping screw, and a clamping spring (540). One end of the clamping base (400) has a slot for placing the external clamping block (510). The bottom of the external clamping block (510) slides in conjunction with the clamping screw. One end of the clamping screw has a limiting block (530), and the other end of the clamping screw is connected to the fixing plate (410). The fixed plate (410) is integrally connected to the lower end face of the clamping base (400) via a threaded connection. The upper part of the external clamping block (510) is the clamping end, which is directly opposite to the two side positioning plates (630). One end of the compression spring (540) abuts against the external clamping block (510), and the other end of the compression spring (540) abuts against the limiting block (530). The compression spring (540) is sleeved on the compression screw.

4. A welding fixture for a battery holder according to claim 3, characterized in that: The clamping end of the external clamping block (510) is provided with a rubber block (520).

5. A welding fixture for a battery holder according to any one of claims 1-4, characterized in that: The weld adjustment mechanism (300) includes an adjustment prism, two adjustment plates (420) and two adjustment screws. Each clamping base (400) has an adjustment plate (420) corresponding to its lower end face. The two adjustment screws are symmetrically arranged on the left and right end faces of the adjustment prism. The threads of the two adjustment screws are opposite in direction, and each adjustment screw is threadedly engaged with one of the adjustment plates (420).

6. A welding fixture for a battery holder according to claim 5, characterized in that: The guide structure includes two guide components (200), which are symmetrically arranged on the upper surface of the fixed base (100), and each guide component (200) is slidably engaged with the adjusting plate (420).

7. A welding fixture for a battery holder according to claim 3, characterized in that: The two side positioning plates (630) are arranged symmetrically at a 45° angle with the workpiece symmetry center line as the reference; the side of the internal clamping block (620) is machined into a 45° inclined surface, which is parallel to the inner surface of the side positioning plate.

8. A welding fixture for a battery holder according to claim 5, characterized in that: A mounting plate (110) is provided on each of the left and right end faces of the fixed base (100).

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