Welding fixture for front auxiliary frame of automobile chassis

Abstract

The invention discloses a welding fixture for a front auxiliary frame of an automobile chassis, and relates to the technical field of welding fixtures. The machining device comprises a machining table, a first machining seat and a second machining seat are mounted at the top of the machining table, and a frame cross beam is arranged at the top of the first machining seat; a fixing assembly is arranged at the top of the machining table and comprises a driving shell arranged at the top of the frame cross beam. A second motor drives a screw rod to drive a moving block, clamping plates on the two sides move synchronously and symmetrically, it is ensured that clamping force is evenly distributed, and a protection assembly monitors and adjusts the supporting force of a protection plate to the interior of a cross beam in real time through a pressure sensor and a pulley mechanism in a supporting column; the protection plate provides reverse support from the inside, the clamping force can be automatically adjusted according to the structural characteristics of the cross beam, intelligent control over the clamping force is achieved through introduction of the pressure sensor, and the clamping force can be immediately adjusted when pressure abnormity is detected, so that the integrity and dimensional stability of the frame structure in the welding process are ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of welding fixtures, and particularly relates to a front auxiliary frame welding fixture for an automobile chassis. BACKGROUND

[0002] Automobile chassis front auxiliary frame welding is a key link in automobile manufacturing. The front auxiliary frame, as an important component connecting the suspension and steering systems, bears the functions of load dispersion and control stability improvement. During welding, processes such as resistance spot welding and arc welding are usually adopted to precisely connect materials such as high-strength steel or aluminum alloy. The welding quality directly affects the strength and durability of the auxiliary frame, and further affects the safety and performance of the whole vehicle. In order to ensure the welding precision and quality, advanced welding equipment and automation technology are used, and strict detection such as nondestructive testing is carried out to ensure that each welding point meets high standards, thereby providing reliable protection for the overall performance of the automobile chassis.

[0003] A Chinese patent application (or patent) with publication number CN217859678U discloses an automobile chassis front auxiliary frame welding fixture, which comprises a BASE plate, and further comprises front suspension frame positioning and clamping mechanisms, longitudinal beam front positioning and clamping mechanisms, front swing arm support positioning and clamping mechanisms, stabilizer bar support positioning and clamping mechanisms, longitudinal beam rear positioning and clamping mechanisms, and rear cross beam positioning and clamping mechanisms. The above-mentioned mechanisms are both in two groups and are symmetrically arranged on both sides of the BASE plate.

[0004] However, the above-mentioned device still has the following problems in the implementation process: In the frame fixing operation, multiple sets of clamping plates are used to clamp the cross beam. However, in order to reduce weight and optimize structure, etc., the cross beam is often designed with a single-sided hollow design. This design makes the structure on both sides of the cross beam asymmetric. When parallel moving clamping plates are used for fixing, it is difficult to ensure that the fixing force on each part of the cross beam is uniform. If the clamping force is too large, the cross beam is prone to deformation due to the relatively weak structure of the single-sided hollow part, which affects the stability and reliability of the whole frame.

[0005] Therefore, we provide an automobile chassis front auxiliary frame welding fixture to solve the above-mentioned problems. SUMMARY

[0006] The purpose of the present application is to provide an automobile chassis front auxiliary frame welding fixture. Through the cooperation of the fixing assembly, the protection assembly and the adjusting assembly, the problem that the existing frame welding fixture adopts multiple sets of clamping plates to clamp the cross beam during the fixing process, but the cross beam is often designed with a single-sided hollow design, and the fixing force of the parallel moving clamping plates on the cross beam is not uniform enough, and the clamping force is too large and prone to deformation is solved.

[0007] To solve the above technical problems, the present application is realized by the following technical solutions.

[0008] The present application is a kind of automobile chassis front subframe welding fixture, including processing table, the first processing seat and the second processing seat are installed on the top of processing table, the top of first processing seat is provided with frame crossbeam;The top of processing table is provided with fixed assembly, the fixed assembly includes the drive shell that is arranged on the top of frame crossbeam, the rotating shaft that is movably connected in the drive shell, the gear that is installed on the surface of rotating shaft, the toothed plate that is engaged on both sides of gear, the connecting frame that is installed on one side of toothed plate, the clamping plate that is installed on the bottom of connecting frame, the frame crossbeam is clamped by fixed assembly;The bottom of drive shell is provided with protection assembly, the protection assembly includes the support column that is installed in the drive shell, the fixed shell that is installed on both sides of support column, the pressure sensor that is installed in the fixed shell, the pulley that is arranged on one side of fixed shell, the push block that is movably connected on one side of pulley, the protection plate that is installed on one side of push block, the inside of frame crossbeam is supported and protected by protection assembly;The top of processing table is provided with adjusting assembly, the adjusting assembly includes the first support and the second support that are installed on the top of processing table, the support sleeve that is movably connected on the surface of first support and second support, the first hydraulic rod that is installed on the bottom of support sleeve, the height of clamping plate and protection plate is adjusted by adjusting assembly.

[0009] The present application is further provided that the top of the processing table is provided with a moving assembly, the moving assembly includes a first motor arranged on the top of the processing table, a rotating shell mounted on the output end of the first motor, a clamping groove opened in the rotating shell, a moving shaft mounted on the top of the support sleeve, and the clamping position of the clamping plate is adjusted by the moving assembly.

[0010] The present application is further provided that the top of the processing table is fixedly connected with a stand, the top of the stand is fixedly connected with a second hydraulic rod, and the output end of the second hydraulic rod is fixedly connected with the first motor.

[0011] The present application is further provided that the support sleeve is fixedly connected with an anti-skid block, and the first support and the second support are fixedly connected with a check block at the bottom.

[0012] The present application is further provided that the fixed assembly further includes a second motor installed in the drive shell, a screw rod installed on the output end of the second motor, and a moving block threadedly connected on the surface of the screw rod.

[0013] The present application is further provided that the top of the moving block is fixedly connected with the connecting frame, the bottom of the moving block is fixedly connected with a sliding block, and the sliding block is movably connected with the inner wall of the drive shell.

[0014] The present application is further provided that the pressure sensor is fixedly connected with a moving frame on one side, and the pulley is movably connected with the inner wall of the moving frame on one side through a bearing.

[0015] The application is further provided with a vertical rod penetrating through the bottom of the support column, a connecting shell mounted at the bottom of the vertical rod, and a support rod slidingly connected to the inside of the connecting shell.

[0016] The application is further provided with a first spring sleeved on the surface of the support rod, with one end of the first spring fixedly connected to the inner wall of the connecting shell.

[0017] The application is further provided with a second spring fixedly connected to the top of the vertical rod, with the other end of the second spring fixedly connected to the inner wall of the vertical rod.

[0018] The application has the following advantages.

[0019] 1. The second motor drives the screw rod to drive the moving block, so that the two clamping plates move synchronously and symmetrically, ensuring uniform distribution of clamping force. The protection assembly monitors and adjusts the supporting force of the protection plate on the inside of the cross beam in real time through the pressure sensor and pulley mechanism inside the support column. When the clamping plate clamps from the outside, the protection plate provides reverse supporting force from the inside, forming an internal and external force balance system. The double protection mechanism is particularly suitable for the cross beam of the single-sided hollow design of the vehicle frame. It can automatically adjust the clamping force according to the structural characteristics of the cross beam, avoid deformation caused by local stress concentration, and realize intelligent control of clamping force through the introduction of the pressure sensor. When an abnormal pressure is detected, it can be immediately adjusted to ensure the integrity and dimensional stability of the vehicle frame structure during welding.

[0020] 2. The application realizes multi-dimensional precise adjustment of the welding position through the design of the adjusting assembly and the moving assembly. The first hydraulic rod drives the support sleeve to move vertically along the first support and the second support, so that the clamping height can be accurately adjusted. The first motor drives the rotating shell to rotate, and the horizontal position is adjusted through the cooperation of the clamping groove and the moving shaft. The second hydraulic rod provides additional vertical fine adjustment capability. The three-dimensional adjustment system enables the clamp to quickly adapt to different specifications of the vehicle frame cross beam and welding position requirements. The anti-skid block inside the support sleeve and the check block at the bottom of the support ensure the locking of the adjusted position, preventing displacement during welding. The quick connection design of the rotating shell facilitates switching between multiple stations, significantly improving welding efficiency.

[0021] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description.

[0023] Figure 1 It is a perspective view of a welding clamp for a front subframe of an automobile chassis.

[0024] Figure 2It is a schematic view of the connection of the processing table, the first processing seat and the second processing seat in the automobile chassis front subframe welding clamp.

[0025] Figure 3 It is a schematic view of the removal of the frame crossbeam in the automobile chassis front subframe welding clamp.

[0026] Figure 4 It is a schematic view of the connection of the rotating shell and the moving shaft in the automobile chassis front subframe welding clamp.

[0027] Figure 5 It is a sectional view of the support sleeve in the automobile chassis front subframe welding clamp.

[0028] Figure 6 It is a schematic view of the alignment of the driving shell and the frame crossbeam in the automobile chassis front subframe welding clamp.

[0029] Figure 7 It is a sectional view of the driving shell in the automobile chassis front subframe welding clamp.

[0030] Figure 8 It is a sectional view of the support column and the connecting shell in the automobile chassis front subframe welding clamp.

[0031] Figure 9 It is a schematic view of the internal structure of the connecting shell in the automobile chassis front subframe welding clamp.

[0032] Figure 10 It is a sectional view of the fixed shell in the automobile chassis front subframe welding clamp.

[0033] In the drawings: 1, processing table; 2, first processing seat; 3, second processing seat; 4, frame crossbeam; 5, fixed assembly; 501, driving shell; 502, rotating shaft; 503, gear; 504, toothed plate; 505, connecting frame; 506, clamping plate; 6, protection assembly; 601, support column; 602, fixed shell; 603, pressure sensor; 604, pulley; 605, push block; 606, protection plate; 7, adjustment assembly; 701, first support; 702, second support; 703, support sleeve; 704, first hydraulic rod; 8, moving assembly; 801, first motor; 802, rotating shell; 803, clamping groove; 804, moving shaft; 9, stand; 10, second hydraulic rod; 11, anti-skid 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 DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. The described embodiments are only some of the embodiments of the present application, but not all the embodiments.

[0035] Embodiment 1: Please refer to Figures 1-10 The present application is a kind of automobile chassis front subframe welding fixture, including processing table 1, the top of processing table 1 is provided with first processing seat 2 and second processing seat 3, the top of first processing seat 2 is provided with frame crossbeam 4;The top of processing table 1 is provided with fixed assembly 5, fixed assembly 5 includes the drive shell 501 that is arranged on the top of frame crossbeam 4, the rotating shaft 502 that is movably connected in the inside of drive shell 501, the gear 503 that is installed on the surface of rotating shaft 502, the toothed plate 504 that is engaged on both sides of gear 503, the connecting frame 505 that is installed on one side of toothed plate 504, the clamping plate 506 that is installed on the bottom of connecting frame 505, the frame crossbeam 4 is clamped through fixed assembly 5;The bottom of drive shell 501 is provided with protection assembly 6, protection assembly 6 includes the support column 601 that is installed in the inside of drive shell 501, the fixed shell 602 that is installed on both sides of support column 601, the pressure sensor 603 that is installed in the inside of fixed shell 602, the pulley 604 that is arranged on one side of fixed shell 602, the push block 605 that is movably connected on one side of pulley 604, the protection plate 606 that is installed on one side of push block 605, the inside of frame crossbeam 4 is supported and protected through protection assembly 6;The top of processing table 1 is provided with adjusting assembly 7, adjusting assembly 7 includes the first support 701 and the second support 702 that are installed on the top of processing table 1, the support sleeve 703 that is movably connected on the surface of first support 701 and second support 702, the first hydraulic rod 704 that is installed on the bottom of support sleeve 703, the height of clamping plate 506 and protection plate 606 is adjusted through adjusting assembly 7.

[0036] Specifically: fixed shell 602 is installed on both sides of support column 601, provides installation space for pressure sensor 603 and pulley 604 mechanism, pressure sensor 603 monitors clamping force in real time, converts mechanical force into electrical signal and feeds back to control system, realizes accurate control of clamping force, prevents overload damage to workpiece, pulley 604 mechanism acts as a force transmission medium, converts the movement of support column 601 into the linear motion of push block 605, its rolling friction design reduces the motion resistance, push block 605 converts the rotary motion of pulley 604 into the linear motion of protection plate 606, its guiding design ensures the accuracy of the motion trajectory, protection plate 606 directly contacts the inside of frame crossbeam 4, provides uniform support force, prevents local stress concentration, vertical rod 607 penetrates the bottom of support column 601, acts as support rod 609 of connecting shell 608, its telescopic design allows adjustment according to the height of beam.

[0037] Embodiment 2: Please refer to Figures 1-10On the basis of embodiment 1, the top of the machining table 1 is provided with a moving assembly 8, the moving assembly 8 comprises a first motor 801 arranged on the top of the machining table 1, a rotating shell 802 mounted on the output end of the first motor 801, a clamping groove 803 opened in the rotating shell 802, a moving shaft 804 mounted on the top of the supporting sleeve 703, the clamping position of the clamping plate 506 is adjusted through the moving assembly 8, the top of the machining table 1 is fixedly connected with a vertical column 9, the top of the vertical column 9 is fixedly connected with a second hydraulic rod 10, the output end of the second hydraulic rod 10 is fixedly connected with the first motor 801, the inside of the supporting sleeve 703 is fixedly connected with an anti-skid block 11, the bottom of the first support 701 and the second support 702 is fixedly connected with a check block 12, the fixing assembly 5 further comprises a second motor 507 mounted in the driving shell 501, a screw rod 508 mounted on the output end of the second motor 507, a moving block 509 threaded on the surface of the screw rod 508, the top of the moving block 509 is fixedly connected with the connecting frame 505, the bottom of the moving block 509 is fixedly connected with a sliding block, and the sliding block is slidingly connected with the inner wall of the driving shell 501.

[0038] Specifically: the supporting rod 609 slides in the connecting shell 608, the initial supporting force is provided by the second spring 15, the double elastic system composed of the first spring 14 and the second spring 15, the first spring 14 can reset the protection plate 606, the second spring 15 can reset the supporting rod 609, the first support 701 and the second support 702 serve as guide rails for height adjustment, the high rigidity design ensures the straightness and stability of the movement of the supporting sleeve 703, the supporting sleeve 703 slides on the surface of the first support 701 and the second support 702, the anti-skid block 11 inside the supporting sleeve 703 increases the friction, prevents accidental sliding, ensures the locking of the working position, and the first hydraulic rod 704 serves as the power source for height adjustment, provides smooth thrust through the hydraulic system, the moving shaft 804 on the top of the supporting sleeve 703 cooperates with the clamping groove 803 of the rotating shell 802, realizes the accurate adjustment and rapid locking of the horizontal position.

[0039] Embodiment 3: see Figures 1-10 On the basis of embodiment 1 and embodiment 2, the side of the pressure sensor 603 is fixedly connected with a moving frame 13, one side of the pulley 604 is movably connected with the inner wall of the moving frame 13 through a bearing, the protection assembly 6 further comprises a vertical rod 607 penetratingly arranged on the bottom of the support column 601, a connecting shell 608 mounted on the bottom of the vertical rod 607, a supporting rod 609 slidingly connected in the connecting shell 608, the supporting rod 609 is sleeved with a first spring 14 on the surface, one end of the first spring 14 is fixedly connected with the inner wall of the connecting shell 608, the top of the vertical rod 607 is fixedly connected with a second spring 15, and the other end of the second spring 15 is fixedly connected with the inner wall of the vertical rod 607.

[0040] Specifically: the first motor 801 provides rotating power, and the servo control thereof can realize accurate angle positioning, meet the adjustment requirements of different clamping positions, the rotating shell 802 is driven to rotate by the first motor 801, the cooperation of the internal clamping groove 803 and the moving shaft 804 realizes quick connection and separation, and the rotating shell 802 is convenient for multi-station adjustment, the moving shaft 804 is a connecting part of the support sleeve 703 and the rotating shell 802, and the cylindrical design ensures the smoothness of rotation, the second hydraulic rod 10 provides vertical adjustment force and cooperates with the first hydraulic rod 704 to realize accurate positioning in three-dimensional space, the anti-skid block 11 is installed in the support sleeve 703, is made of high-friction coefficient material, and ensures that displacement does not occur in the locked state, and the check block 12 is designed at the bottom of the first support 701 and the second support 702, prevents the support sleeve 703 from accidentally slipping off, and improves safety.

[0041] The working principle of the present application is that the staff places the two ends of the frame cross beam 4 to be machined on the top of the first machining seat 2 and the second machining seat 3 respectively, then starts the first motor 801, the first motor 801 drives the rotating shell 802 to rotate, the rotating shell 802 rotates and is sleeved on the surface of the moving shaft 804, then the second hydraulic rod 10 is started, the second hydraulic rod 10 cooperates with the first motor 801 to drive the rotating shell 802 to move, the rotating shell 802 drives the moving shaft 804 and the support sleeve 703 to move, the support sleeve 703 cooperates with the first hydraulic rod 704 to drive the driving shell 501 to move, and the position of the clamping plate 506 and the protection plate 606 is adjusted, so that the clamping plate 506 and the protection plate 606 are aligned with the hollow part of the frame cross beam 4.

[0042] Then the first hydraulic rod 704 is started, the first hydraulic rod 704 drives the driving shell 501 to move, the driving shell 501 cooperates with the support column 601 to drive the connecting shell 608 to move, when the connecting shell 608 contacts the inner wall of the frame cross beam 4, the first hydraulic rod 704 can be continuously controlled to drive the driving shell 501 to move downwards, the position of the connecting shell 608 remains unchanged when the driving shell 501 moves, the driving shell 501 cooperates with the support column 601 to drive the pulley 604 to move, the pulley 604 drives the push block 605 to move, the push block 605 drives the two groups of protection plates 606 to move in opposite directions, supports the inner side of the frame cross beam 4, and at the same time, the pulley 604 feeds back the extrusion force to the pressure sensor 603, and the pressure sensor 603 controls the pressing force, and plays a protection role.

[0043] Then the second motor 507 is started, the second motor 507 drives the moving block 509 to move through the screw rod 508, the moving block 509 drives the gear plate 504 to move through the connecting frame 505, the gear plate 504 drives the gear 503 to rotate, when the gear 503 rotates, the two groups of gear plates 504 relatively move, the gear plate 504 drives the two groups of clamping plates 506 to relatively move through the connecting frame 505, clamping from the outside of the frame cross beam 4, the clamping force of the frame cross beam 4 can be effectively avoided to be too large, the deformation condition is caused, the protection effect is improved, at the same time, the first motor 801 can be started again, the rotary shell 802 is driven to rotate and overturn, the support sleeve 703 on the surface of the second support 702 is aligned, and the rotary shaft 502 is inserted into the surface, the position of the plurality of drive shells 501 can be adjusted individually by the second hydraulic rod 10, the different positions of the frame cross beam 4 can be clamped conveniently, and the stability of the welding processing is improved.

[0044] The above only describes some exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. An automobile chassis front subframe welding fixture comprising a machining table (1), characterized in that: The first machining seat (2) is provided with a frame cross beam (4) on the top thereof; The machining table (1) is provided with a fixing assembly (5) on the top thereof, the fixing assembly (5) comprises a driving shell (501) arranged on the top of the frame cross beam (4), a rotating shaft (502) movably connected in the driving shell (501), a gear (503) arranged on the surface of the rotating shaft (502), a toothed plate (504) engaged with the gear (503) on both sides, a connecting frame (505) arranged on one side of the toothed plate (504), a clamping plate (506) arranged on the bottom of the connecting frame (505), and the frame cross beam (4) is clamped by the fixing assembly (5); The driving shell (501) is provided with a protection assembly (6) on the bottom thereof, the protection assembly (6) comprises a support column (601) arranged in the driving shell (501), a fixed shell (602) arranged on both sides of the support column (601), a pressure sensor (603) arranged in the fixed shell (602), a pulley (604) arranged on one side of the fixed shell (602), a push block (605) slidably connected on one side of the pulley (604), a protection plate (606) arranged on one side of the push block (605), and the inside of the frame cross beam (4) is supported and protected by the protection assembly (6); The machining table (1) is provided with an adjusting assembly (7) on the top thereof, the adjusting assembly (7) comprises a first support (701) and a second support (702) arranged on the top of the machining table (1), a supporting sleeve (703) slidably connected on the surface of the first support (701) and the second support (702), and a first hydraulic rod (704) arranged on the bottom of the supporting sleeve (703), and the height of the clamping plate (506) and the protection plate (606) is adjusted by the adjusting assembly (7).

2. The welding fixture for the front subframe of the automobile chassis according to claim 1, characterized in that: The machining table (1) is provided with a moving assembly (8) on the top thereof, the moving assembly (8) comprises a first motor (801) arranged on the top of the machining table (1), a rotating shell (802) arranged on the output end of the first motor (801), a clamping groove (803) arranged in the rotating shell (802), a moving shaft (804) arranged on the top of the supporting sleeve (703), and the clamping position of the clamping plate (506) is adjusted by the moving assembly (8).

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

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

5. The welding fixture for the front subframe of the automobile chassis according to claim 1, characterized in that: The fixing assembly (5) further comprises a second motor (507) arranged in the driving shell (501), a screw rod (508) arranged on the output end of the second motor (507), and a moving block (509) threadedly connected on the surface of the screw rod (508).

6. The welding fixture for the front subframe of the automobile chassis according to claim 5, characterized in that: The mobile block (509) top is fixedly connected with the connecting frame (505), and the mobile block (509) bottom is fixedly connected with a sliding block which is slidingly connected with the inner wall of the driving shell (501).

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

8. The welding fixture for the front subframe of the automobile chassis according to claim 1, characterized in that: The protection assembly (6) further comprises a vertical rod (607) penetrating through the bottom of the support column (601), a connecting shell (608) installed at the bottom of the vertical rod (607), and a supporting rod (609) slidingly connected in the connecting shell (608).

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

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

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