Automobile chassis front subframe welding fixture

Abstract

The application discloses a kind of automobile chassis front subframe welding jigs, it is related to welding jig technical field.The present application includes processing table, the first processing seat and the second processing seat are installed in the top of processing table, the top of the first processing seat is provided with frame crossbeam;The top of processing table is provided with fixed assembly, and the fixed assembly includes the drive shell that is arranged on the top of frame crossbeam.The present application is driven screw by the second motor, and moves block, so that both sides of clamping plate are synchronously symmetrical, it is ensured that clamping force is evenly distributed, and protection assembly is monitored and adjusted in real time by the support force of protection plate to the inside of crossbeam by the pressure sensor and pulley mechanism in the support column, clamping plate is clamped from outside, and protection plate provides reverse support from inside, can automatically adjust clamping force according to the structural characteristics of crossbeam, the introduction of pressure sensor realizes the intelligent control of clamping force, and when detecting pressure anomaly, it can be immediately adjusted, to ensure the integrity of frame structure and dimensional stability during welding process.

Description

Technical Field

[0001] This invention belongs to the field of welding fixture technology, and in particular relates to a welding fixture for the front subframe of an automobile chassis. Background Technology

[0002] Welding of the front subframe is a critical step in automobile manufacturing. As a vital component connecting the suspension and steering systems, the front subframe plays a crucial role in distributing loads and enhancing handling stability. Welding typically employs techniques such as resistance spot welding and arc welding to precisely connect high-strength steel or aluminum alloys. The welding quality directly impacts the strength and durability of the subframe, thus affecting the overall vehicle safety and performance. To ensure welding precision and quality, advanced welding equipment and automation technologies are used, along with rigorous testing methods such as non-destructive testing, to ensure that every weld meets high standards, providing a reliable guarantee for the overall performance of the automobile chassis.

[0003] A Chinese patent application (or patent) with publication number CN217859678U discloses a welding fixture for the front subframe of an automobile chassis, including a BASE plate, and further including a front suspension bracket positioning and clamping mechanism, a longitudinal beam front positioning and clamping mechanism, a front control arm bracket positioning and clamping mechanism, a stabilizer bar bracket positioning and clamping mechanism, a longitudinal beam rear positioning and clamping mechanism, and a rear crossbeam positioning and clamping mechanism. Each of the above mechanisms has two sets, which are symmetrically arranged on both sides of the BASE plate.

[0004] However, the above-mentioned device still has the following problems during implementation:

[0005] In the frame fixing operation, multiple sets of clamps are used to hold the crossbeam. However, in order to reduce weight and optimize the structure, the frame crossbeam is often designed with a single-sided hollow design. This design makes the structure on both sides of the crossbeam asymmetrical. When using parallel moving clamps for fixing, it is difficult to ensure that the fixing force on each part of the crossbeam is uniform. When the clamping force is too large, the crossbeam is easily deformed because the structure of the single-sided hollow part is relatively weak, which affects the overall stability and reliability of the frame.

[0006] To address these issues, we provide a welding fixture for the front subframe of an automotive chassis. Summary of the Invention

[0007] The purpose of this invention is to provide a welding fixture for the front subframe of an automobile chassis. Through the cooperation of fixing components, protective components, and adjusting components, it solves the problem in the prior art that when multiple sets of clamping plates are used to clamp the crossbeam during the fixing process, the crossbeam is often designed with a single-sided hollow design. During the clamping process, the parallel moving clamping plates do not provide uniform fixing force on the crossbeam, and excessive clamping force can easily cause deformation.

[0008] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0009] This invention relates to a welding fixture for a front subframe of an automobile chassis, comprising a processing table, a first processing seat and a second processing seat mounted on the top of the processing table, and a frame crossbeam disposed on the top of the first processing seat; a fixing assembly is disposed on the top of the processing table, the fixing assembly comprising a drive housing disposed on the top of the frame crossbeam, a rotating shaft movably connected to the inside of the drive housing, a gear mounted on the surface of the rotating shaft, gear plates meshing with both sides of the gear, a connecting frame mounted on one side of the gear plates, and a clamping plate mounted on the bottom of the connecting frame, the fixing assembly clamping the frame crossbeam; a protective assembly is disposed at the bottom of the drive housing, the protective assembly... The components include a support column installed inside the drive housing, fixed housings installed on both sides of the support column, a pressure sensor installed inside the fixed housing, a pulley located on one side of the fixed housing, a push block slidably connected to one side of the pulley, and a protective plate installed on one side of the push block. The protective components provide support and protection for the interior of the frame crossbeam. An adjustment component is provided on the top of the processing table. The adjustment component includes a first bracket and a second bracket installed on the top of the processing table, a support sleeve slidably connected to the surfaces of the first bracket and the second bracket, and a first hydraulic rod installed at the bottom of the support sleeve. The height of the clamping plate and the protective plate can be adjusted by the adjustment component.

[0010] The present invention is further configured such that a moving component is provided on the top of the processing table, the moving component including a first motor provided on the top of the processing table, a rotating shell installed on the output end of the first motor, a slot opened inside the rotating shell, and a moving shaft installed on the top of the support sleeve, the clamping position of the clamping plate is adjusted by the moving component.

[0011] The present invention is further configured such that a column is fixedly connected to the top of the processing table, a second hydraulic rod is fixedly connected to the top of the column, and the output end of the second hydraulic rod is fixedly connected to the first motor.

[0012] The present invention is further configured such that an anti-slip block is fixedly connected inside the support sleeve, and a check block is fixedly connected to the bottom of both the first bracket and the second bracket.

[0013] The present invention is further configured such that the fixing component also includes a second motor installed inside the drive housing, a screw installed at the output end of the second motor, and a movable block threadedly connected to the surface of the screw.

[0014] The invention is further configured such that the top of the movable block is fixedly connected to the connecting frame, and the bottom of the movable block is fixedly connected to a slider, which is slidably connected to the inner wall of the drive housing.

[0015] The invention is further configured such that a movable frame is fixedly connected to one side of the pressure sensor, and the pulley is movably connected to the inner wall of the movable frame via a bearing.

[0016] The present invention is further configured such that the protective component includes a vertical rod extending through the bottom of the support column, a connecting shell installed at the bottom of the vertical rod, and a support rod slidably connected inside the connecting shell.

[0017] The present invention is further configured such that a first spring is sleeved on the surface of the support rod, and one end of the first spring is fixedly connected to the inner wall of the connecting shell.

[0018] The present invention is further configured such that a second spring is fixedly connected to the top of the vertical rod, and the other end of the second spring is fixedly connected to the inner wall of the vertical rod.

[0019] The present invention has the following beneficial effects.

[0020] 1. This invention uses a second motor to drive a screw, which in turn moves a moving block, causing the clamping plates on both sides to move synchronously and symmetrically, ensuring a uniform distribution of clamping force. The protective component monitors and adjusts the support force of the protective plate on the inside of the crossbeam in real time through a pressure sensor and pulley mechanism inside the support column. When the clamping plate is clamped from the outside, the protective plate provides a reverse support force from the inside, forming an internal and external force balance system. This dual protection mechanism is particularly suitable for crossbeams with a single-sided hollow design, and can automatically adjust the clamping force according to the structural characteristics of the crossbeam to avoid deformation caused by local stress concentration. The introduction of the pressure sensor enables intelligent control of the clamping force, and can be adjusted immediately when an abnormal pressure is detected, ensuring the integrity and dimensional stability of the frame structure during welding.

[0021] 2. This invention achieves multi-dimensional precise adjustment of the welding position through the design of adjustment and moving components. The first hydraulic rod drives the support sleeve to move vertically along the first and second supports, which can precisely adjust the clamping height. The first motor drives the rotating shell to rotate, and the horizontal position is adjusted through the cooperation of the slot and the moving shaft. The second hydraulic rod provides additional vertical fine adjustment capability. The three-dimensional adjustment system enables the fixture to quickly adapt to the requirements of different specifications of frame beams and welding positions. The anti-slip block inside the support sleeve and the check block at the bottom of the support ensure that the position is locked after adjustment to prevent displacement during the welding process. The quick connection design of the rotating shell facilitates switching between multiple workstations and significantly improves welding efficiency.

[0022] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0024] Figure 1 This is a perspective view of a welding fixture for the front subframe of an automobile chassis.

[0025] Figure 2This is a schematic diagram showing the connection between the machining table, the first machining seat, and the second machining seat in a welding fixture for the front subframe of an automobile chassis.

[0026] Figure 3 This is a schematic diagram of removing a crossbeam from a front subframe welding fixture for an automobile chassis.

[0027] Figure 4 This is a schematic diagram showing the connection between the rotating shell and the moving shaft in a welding fixture for the front subframe of an automobile chassis.

[0028] Figure 5 This is a cross-sectional view of a support sleeve in a welding fixture for the front subframe of an automobile chassis.

[0029] Figure 6 This is a schematic diagram showing the alignment of the drive housing and the frame crossbeam in a welding fixture for the front subframe of an automobile chassis.

[0030] Figure 7 This is a cross-sectional view of the drive housing in a welding fixture for the front subframe of an automobile chassis.

[0031] Figure 8 This is a cross-sectional view of the support column and connecting shell in a welding fixture for the front subframe of an automobile chassis.

[0032] Figure 9 This is a schematic diagram of the internal structure of the connecting shell in a welding fixture for the front subframe of an automobile chassis.

[0033] Figure 10 This is a cross-sectional view of a fixed shell in a welding fixture for the front subframe of an automobile chassis.

[0034] In the attached diagram: 1. Machining table; 2. First machining seat; 3. Second machining seat; 4. Chassis crossbeam; 5. Fixing assembly; 501. Drive housing; 502. Rotary shaft; 503. Gear; 504. Gear plate; 505. Connecting frame; 506. Clamping plate; 6. Protective assembly; 601. Support column; 602. Fixing housing; 603. Pressure sensor; 604. Pulley; 605. Push block; 606. Protective plate; 7. Adjusting assembly; 701. First bracket; 702. Second bracket; 703, support sleeve; 704, first hydraulic rod; 8, moving assembly; 801, first motor; 802, rotating shell; 803, slot; 804, moving shaft; 9, column; 10, second hydraulic rod; 11, anti-slip block; 12, check block; 507, second motor; 508, screw; 509, moving block; 13, moving frame; 607, vertical rod; 608, connecting shell; 609, support rod; 14, first spring; 15, second spring. Detailed Implementation

[0035] The technical solutions of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] Example 1: Please refer to Figures 1-10 This invention relates to a welding fixture for a front subframe of an automobile chassis, comprising a processing table 1, a first processing seat 2 and a second processing seat 3 mounted on the top of the processing table 1, and a frame crossbeam 4 mounted on the top of the first processing seat 2; a fixing assembly 5 is mounted on the top of the processing table 1, the fixing assembly 5 including a drive housing 501 mounted on the top of the frame crossbeam 4, a rotating shaft 502 movably connected inside the drive housing 501, a gear 503 mounted on the surface of the rotating shaft 502, gear plates 504 meshing on both sides of the gear 503, a connecting frame 505 mounted on one side of the gear plate 504, and a clamping plate 506 mounted on the bottom of the connecting frame 505, the fixing assembly 5 clamping the frame crossbeam 4; a protective assembly 6 is mounted at the bottom of the drive housing 501, the protective assembly 6 including components mounted inside the drive housing 501. The frame beam 4 is supported and protected by a support column 601, fixed housings 602 installed on both sides of the support column 601, pressure sensor 603 installed inside the fixed housing 602, pulley 604 set on one side of the fixed housing 602, push block 605 slidably connected to one side of the pulley 604, and protective plate 606 installed on one side of the push block 605. The top of the processing table 1 is provided with an adjustment component 7, which includes a first bracket 701 and a second bracket 702 installed on the top of the processing table 1, a support sleeve 703 slidably connected to the surface of the first bracket 701 and the second bracket 702, and a first hydraulic rod 704 installed at the bottom of the support sleeve 703. The height of the clamping plate 506 and the protective plate 606 can be adjusted by the adjustment component 7.

[0037] Specifically: The fixed housing 602 is installed on both sides of the support column 601, providing installation space for the pressure sensor 603 and the pulley 604 mechanism. The pressure sensor 603 monitors the clamping force in real time, converts the mechanical force into an electrical signal, and feeds it back to the control system to achieve precise control of the clamping force and prevent overload damage to the workpiece. The pulley 604 mechanism, as the force transmission medium, converts the movement of the support column 601 into the linear motion of the push block 605. Its rolling friction design reduces the movement resistance. The push block 605 converts the rotational motion of the pulley 604 into the linear motion of the protective plate 606. Its guiding design ensures the accuracy of the movement trajectory. The protective plate 606 directly contacts the inside of the frame crossbeam 4, providing uniform support force and preventing local stress concentration. The vertical rod 607 passes through the bottom of the support column 601 and serves as the support rod 609 connecting the housing 608. Its telescopic design allows for adjustment according to the height of the crossbeam.

[0038] Example 2: Please refer to Figures 1-10Based on Embodiment 1, a moving assembly 8 is provided on the top of the processing table 1. The moving assembly 8 includes a first motor 801 located on the top of the processing table 1, a rotating housing 802 installed at the output end of the first motor 801, a slot 803 opened inside the rotating housing 802, and a moving shaft 804 installed on the top of the support sleeve 703. The clamping position of the clamping plate 506 is adjusted by the moving assembly 8. A column 9 is fixedly connected to the top of the processing table 1, and a second hydraulic rod 10 is fixedly connected to the top of the column 9. The output end of the second hydraulic rod 10 is connected to the first... The motor 801 is fixedly connected, and the anti-slip block 11 is fixedly connected inside the support sleeve 703. The bottom of the first bracket 701 and the second bracket 702 are both fixedly connected to the anti-return block 12. The fixing assembly 5 also includes a second motor 507 installed inside the drive housing 501, a screw 508 installed at the output end of the second motor 507, a moving block 509 threadedly connected to the surface of the screw 508, the top of the moving block 509 being fixedly connected to the connecting frame 505, and a slider being fixedly connected to the bottom of the moving block 509. The slider is slidably connected to the inner wall of the drive housing 501.

[0039] Specifically: the support rod 609 slides inside the connecting shell 608, and the second spring 15 provides initial support force. The first spring 14 and the second spring 15 form a dual elastic system. The first spring 14 can reset the protective plate 606, and the second spring 15 can reset the support rod 609. The first bracket 701 and the second bracket 702 serve as guide rails for height adjustment. Their high rigidity design ensures the straightness and stability of the movement of the support sleeve 703. The support sleeve 703 slides on the surfaces of the first bracket 701 and the second bracket 702. The internal anti-slip block 11 design increases friction to prevent accidental slippage and ensure the working position is locked. The first hydraulic rod 704 serves as the power source for height adjustment, providing smooth thrust through the hydraulic system. The moving shaft 804 at the top of the support sleeve 703 cooperates with the slot 803 of the rotating shell 802 to achieve precise adjustment and quick locking of the horizontal position.

[0040] Example 3: Please refer to Figures 1-10 Based on Embodiments 1 and 2, a movable frame 13 is fixedly connected to one side of the pressure sensor 603, and a pulley 604 is movably connected to the inner wall of the movable frame 13 via a bearing. The protection component 6 also includes a vertical rod 607 that passes through the bottom of the support column 601, a connecting shell 608 installed at the bottom of the vertical rod 607, and a support rod 609 that is slidably connected inside the connecting shell 608. A first spring 14 is sleeved on the surface of the support rod 609. One end of the first spring 14 is fixedly connected to the inner wall of the connecting shell 608, and a second spring 15 is fixedly connected to the top of the vertical rod 607. The other end of the second spring 15 is fixedly connected to the inner wall of the vertical rod 607.

[0041] Specifically: The first motor 801 provides rotational power, and its servo control enables precise angle positioning to meet the adjustment requirements of different clamping positions. The rotating shell 802 is driven to rotate by the first motor 801. Its internal slot 803 design, in conjunction with the moving shaft 804, enables quick connection and separation, facilitating multi-station adjustment. The moving shaft 804, as the connecting component between the support sleeve 703 and the rotating shell 802, has a cylindrical design that ensures smooth rotation. The second hydraulic rod 10 provides vertical adjustment force and works in conjunction with the first hydraulic rod 704 to achieve precise positioning in three-dimensional space. The anti-slip block 11 is installed inside the support sleeve 703 and is made of a high-friction coefficient material to ensure no displacement occurs in the locked state. The check block 12 is designed at the bottom of the first bracket 701 and the second bracket 702 to prevent the support sleeve 703 from accidentally slipping out, thus improving safety.

[0042] The working principle of this invention is as follows: The operator places the two ends of the frame crossbeam 4 to be processed on the top of the first processing seat 2 and the second processing seat 3 respectively. Then, the first motor 801 is started, which drives the rotating shell 802 to rotate. When the rotating shell 802 rotates, it is fitted onto the surface of the moving shaft 804. Then, the second hydraulic rod 10 is started. The second hydraulic rod 10, together with the first motor 801, drives the rotating shell 802 to move. The rotating shell 802 pushes the moving shaft 804 and the support sleeve 703 to move. The support sleeve 703, together with the first hydraulic rod 704, drives the drive shell 501 to move, thereby adjusting the position of the clamping plate 506 and the protective plate 606 so that the clamping plate 506 and the protective plate 606 are aligned with the hollow part of the frame crossbeam 4.

[0043] Then, the first hydraulic rod 704 is activated, which pushes the drive housing 501 to move. The drive housing 501, in conjunction with the support column 601, drives the connecting housing 608 to move. When the connecting housing 608 contacts the inner wall of the frame crossbeam 4, the first hydraulic rod 704 can be controlled to continue moving the drive housing 501 downward. While the drive housing 501 is moving, the position of the connecting housing 608 remains unchanged. The drive housing 501, in conjunction with the support column 601, drives the pulley 604 to move. The pulley 604 pushes the push block 605 to move. The push block 605 drives the two sets of protective plates 606 to move in opposite directions, providing support from the inside of the frame crossbeam 4. At the same time, the pulley 604 feeds back the compressive force to the pressure sensor 603, which controls the clamping force to provide protection.

[0044] Then, the second motor 507 is started. The second motor 507, together with the screw 508, drives the moving block 509 to move. The moving block 509, together with the connecting frame 505, drives the toothed plate 504 to move. The toothed plate 504 drives the gear 503 to rotate. When the gear 503 rotates, it drives the two sets of toothed plates 504 to move relative to each other. The toothed plate 504, together with the connecting frame 505, drives the two sets of clamping plates 506 to move relative to each other. It clamps from the outside of the frame crossbeam 4, which can effectively avoid excessive clamping force on the frame crossbeam 4 and cause deformation, thus improving the protection effect. At the same time, the first motor 801 can be started again to drive the rotating shell 802 to rotate and align with the support sleeve 703 sliding on the surface of the second bracket 702 and insert it into the surface of the rotating shaft 502. The position of multiple sets of drive shells 501 can be adjusted individually using the second hydraulic rod 10, which facilitates clamping at different positions of the frame crossbeam 4 and improves the stability of welding processing.

[0045] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A welding fixture for a front subframe of an automobile chassis, comprising a processing table (1), characterized in that: The processing table (1) is equipped with a first processing seat (2) and a second processing seat (3) on its top, and a frame crossbeam (4) is provided on the top of the first processing seat (2). The processing table (1) is provided with a fixing component (5) on top. The fixing component (5) includes a drive housing (501) on top of the frame beam (4), a rotating shaft (502) movably connected inside the drive housing (501), a gear (503) installed on the surface of the rotating shaft (502), a toothed plate (504) meshing with both sides of the gear (503), a connecting frame (505) installed on one side of the toothed plate (504), and a clamping plate (506) installed at the bottom of the connecting frame (505). The frame beam (4) is clamped by the fixing component (5). The bottom of the drive housing (501) is provided with a protective component (6). The protective component (6) includes a support column (601) installed inside the drive housing (501), a fixed housing (602) installed on both sides of the support column (601), a pressure sensor (603) installed inside the fixed housing (602), a pulley (604) set on one side of the fixed housing (602), a push block (605) slidably connected to one side of the pulley (604), and a protective plate (606) installed on one side of the push block (605). The protective component (6) provides support and protection for the interior of the frame crossbeam (4). The processing table (1) is provided with an adjustment component (7) on its top. The adjustment component (7) includes a first bracket (701) and a second bracket (702) installed on the top of the processing table (1), a support sleeve (703) slidably connected to the surface of the first bracket (701) and the second bracket (702), and a first hydraulic rod (704) installed at the bottom of the support sleeve (703). The height of the clamping plate (506) and the protective plate (606) can be adjusted by the adjustment component (7).

2. The welding fixture for the front subframe of an automobile chassis according to claim 1, characterized in that: The top of the processing table (1) is provided with a moving component (8), which includes a first motor (801) located on the top of the processing table (1), a rotating shell (802) installed at the output end of the first motor (801), a slot (803) opened inside the rotating shell (802), and a moving shaft (804) installed on the top of the support sleeve (703). The clamping position of the clamping plate (506) is adjusted by the moving component (8).

3. The welding fixture for the front subframe of an automobile chassis according to claim 1, characterized in that: The processing table (1) is fixedly connected to a column (9) on top, and a second hydraulic rod (10) is fixedly connected to the top of the column (9). The output end of the second hydraulic rod (10) is fixedly connected to the first motor (801).

4. The welding fixture for the front subframe of an automobile chassis according to claim 1, characterized in that: The support sleeve (703) is fixedly connected with an anti-slip block (11), and the bottom of the first bracket (701) and the second bracket (702) are both fixedly connected with a check block (12).

5. The welding fixture for the front subframe of an automobile chassis according to claim 1, characterized in that: The fixing component (5) also includes a second motor (507) installed inside the drive housing (501), a screw (508) installed at the output end of the second motor (507), and a moving block (509) threaded to the surface of the screw (508).

6. The welding fixture for the front subframe of an automobile chassis according to claim 5, characterized in that: The top of the movable block (509) is fixedly connected to the connecting frame (505), and the bottom of the movable block (509) is fixedly connected to a slider, which is slidably connected to the inner wall of the drive housing (501).

7. The welding fixture for the front subframe of an automobile chassis according to claim 1, characterized in that: The pressure sensor (603) is fixedly connected to a movable frame (13) on one side, and the pulley (604) is movably connected to the inner wall of the movable frame (13) via a bearing on one side.

8. The welding fixture for the front subframe of an automobile chassis according to claim 1, characterized in that: The protective component (6) also includes a vertical rod (607) that runs through the bottom of the support column (601), a connecting shell (608) installed at the bottom of the vertical rod (607), and a support rod (609) that is slidably connected inside the connecting shell (608).

9. A welding fixture for a front subframe of an automobile chassis according to claim 8, characterized in that: The support rod (609) is fitted with a first spring (14), and one end of the first spring (14) is fixedly connected to the inner wall of the connecting shell (608).

10. A welding fixture for a front subframe of an automobile chassis according to claim 8, characterized in that: A second spring (15) is fixedly connected to the top of the vertical rod (607), and the other end of the second spring (15) is fixedly connected to the inner wall of the vertical rod (607).

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