An automobile suspension lower support processing jig and a processing method

Abstract

This invention relates to the field of automotive parts processing technology and discloses a machining fixture for a lower suspension bracket. The fixture includes a machining table with left and right clamps on its lower surface. Clamping plates are mounted on both the left and right sides of the upper part of the machining table, and upper and lower clamps are provided on the upper surface of each clamping plate. Front and rear clamps are provided on opposite sides of each clamping plate, and a leveling mechanism is provided on the opposite side. This invention uses a positioning component that can be linked and synchronized to position and pre-clamp the lower suspension bracket in the front-rear direction, and utilizes ratchet and pawl for self-locking and anti-reverse. A motor-driven screw drives a screw block with opposite threads, enabling the clamping plates on both sides to stably and reliably perform left-right clamping actions. A telescopic cylinder drives a second clamping plate to precisely apply vertical clamping force. This clamping method, which coordinates in the front-rear, left-right, and vertical dimensions, effectively overcomes the processing deformation problem caused by the weak structural rigidity of the lower suspension bracket.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing technology, specifically to a machining fixture and processing method for automotive lower suspension brackets. Background Technology

[0002] The lower suspension bracket is a key load-bearing component in the powertrain suspension system of an automobile. It is usually made by casting and has the characteristics of complex structure, relatively thin wall thickness and weak rigidity. It requires welding during production.

[0003] The existing technology disclosure number CN215824668U proposes a multi-purpose engine mount welding positioning fixture, which is equipped with a welding platform, a side groove on the welding platform, a sliding groove at the bottom of the side groove, and a waste trough adapted in the sliding groove to collect waste at any time. A positioning fixture is set on the welding platform to perform welding operations on the workpiece. However, its fixation is not firm enough and its practicality is poor.

[0004] Chinese patent discloses a welding fixture for an automotive engine mount bracket (authorization announcement number CN219026486U). The patented technology involves starting a drive motor that drives a bidirectional screw to rotate via a reducer, thereby causing a moving block to slide in a moving groove, which in turn causes a fixing clamp to move in opposite directions, fixing and clamping the engine mount bracket on both sides. Then, the fixing cylinder is activated, and the telescopic end of the fixing cylinder causes a rubber pad to descend, thereby fixing the engine mount bracket from above.

[0005] However, it has certain drawbacks: it only relies on the movement and clamping of the fixed clamping plate in the left and right directions (achieved by the moving block driven by the bidirectional screw), and lacks an independent front and back clamping mechanism. The workpiece is positioned in the front and back directions only by the movement and positioning of the sliding seat and the slide rail, without the application of active clamping force, which makes the workpiece susceptible to displacement due to lateral forces during the welding process; the single horizontal (left and right) and vertical (up and down) clamping combination cannot form a complete constraint on the three degrees of freedom of the workpiece. When the welding point is located in an asymmetrical position or when an oblique force is applied, the workpiece may twist around the vertical axis, affecting the welding accuracy.

[0006] For suspended lower brackets with non-parallel or inclined mounting surfaces, existing fixtures lack height-adjustable support structures. During processing, manual adjustment of the workpiece tilt angle using shims is required, which is not only inefficient but also prone to loosening of the shims, causing angular deviations and resulting in out-of-tolerance welding or machining of inclined surfaces, making it difficult to meet high-precision geometric tolerance requirements.

[0007] In summary, existing technologies are insufficient to achieve comprehensive and stable constraints on workpieces in three-dimensional space, and they cannot solve the accuracy and efficiency problems of clamping at complex angles, thus restricting the processing quality and consistency of the suspended lower bracket. Summary of the Invention

[0008] The purpose of this invention is to provide a machining fixture and machining method for automotive lower suspension brackets to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A machining fixture for a car suspension lower bracket includes a machining table. The upper surface of the machining table has a sliding hole extending through to the lower surface in the left-right direction. The lower surface of the machining table is provided with left and right clamps. The upper left and right sides of the machining table are each equipped with a clamping plate. The left side surface of the clamping plate has a sliding hole extending through to the right side in the front-back direction. The upper surface of the clamping plate is provided with upper and lower clamps.

[0011] Each of the two clamping plates has a front and rear clamping member on its opposite side surface. The front and rear clamping members include a C-shaped plate. A rotating rod is rotatably connected to the vertical section of the C-shaped plate. A linkage plate is fixedly connected to the end of the rotating rod near the clamping plate. A linkage rod is rotatably connected to the upper and lower ends of the side surface of the linkage plate away from the clamping plate. A linkage plate is rotatably connected to the end of the linkage rod away from the linkage plate. A slider is fixedly connected to the side surface of the linkage plate near the clamping plate and the end near the linkage rod. A slide rail is slidably connected to the side surface of the slider near the clamping plate in the front and back direction. A positioning member is provided on the side surface of the linkage plate near the clamping plate and the end away from the linkage rod.

[0012] A leveling mechanism is provided at the lower end of one of the opposite surfaces of the two clamping plates.

[0013] As a further embodiment of the present invention: the left and right clamps include a support rod, and support blocks are fixedly connected to both ends of the support rod. A motor is fixedly connected to the left surface of the left support block, and a screw is fixedly connected to the output end of the motor. Screw blocks are threadedly sleeved on both sides of the screw located between the two support blocks.

[0014] As a further embodiment of the present invention: the upper and lower clamps include a support plate, a telescopic cylinder is fixedly connected to the upper surface of the support plate, and a clamping plate is fixedly connected to the telescopic end of the telescopic cylinder.

[0015] As a further embodiment of the present invention: the positioning component includes a positioning rod, and a positioning plate is fixedly connected to one end of the positioning rod away from the second linkage plate. Multiple rollers are evenly embedded and rolled on the front and rear surfaces of the positioning plate from left to right.

[0016] As a further embodiment of the present invention: a ratchet is fixedly connected to the end of the rotating rod away from the clamping plate, and a limiting member is provided on the surface of the vertical section of the C-shaped plate away from the clamping plate. The limiting member includes a spring, a limiting block is fixedly connected to the end of the spring away from the rotating rod, and a pawl is fixedly connected to the end of the spring near the rotating rod. A limiting rod is rotatably connected to the end of the pawl away from the rotating rod.

[0017] As a further embodiment of the present invention: the horizontal section of the C-shaped plate is fixed to the upper and lower sides of one side surface of the clamping plate, the C-shaped plate is located outside the linkage plate, and the slide rail is fixed to one side surface of the clamping plate.

[0018] As a further embodiment of the present invention: the two support blocks are respectively fixed to the left and right ends of the lower surface of the processing table, the right end of the screw is rotatably connected to the left side of the right support block, the screw block is movably located inside the sliding hole, the threads of the two screw blocks are opposite, and the upper ends of the two screw blocks are respectively fixed to the left and right clamping plates.

[0019] As a further embodiment of the present invention: the end of the support plate away from the telescopic cylinder is fixed to the upper end of the clamping plate one, and the clamping plate two is located on the opposite side of the two clamping plates one.

[0020] As a further embodiment of the present invention: the positioning rod is movably located inside the sliding hole two, and the positioning rod is fixed to the side surface of the linkage plate two near the clamping plate one and away from the linkage rod.

[0021] As a further embodiment of the present invention: the pawl is attached to the ratchet, and the limiting block and the limiting rod are both fixed to the surface of the vertical section of the C-shaped plate away from the clamping plate.

[0022] As a further embodiment of the present invention: the leveling mechanism includes a mounting frame, the mounting frame is fixedly connected to one side surface of the clamping plate, a motor is fixedly connected to the front surface of the mounting frame, a gear is fixedly connected to the output end of the motor, a rack is slidably connected to the inner side surface of the mounting frame in the up-down direction, the rack is meshed with the gear, and an adjusting plate is fixedly connected to the upper end of the rack.

[0023] On the other hand, a method for manufacturing a lower suspension bracket for automobiles includes the following steps:

[0024] S1: Place the lower suspension bracket on the leveling mechanism. Adjust the height of the leveling mechanism according to the angle requirements of the non-parallel or vertical surfaces to be processed, so that the two ends of the lower suspension bracket reach the required height difference.

[0025] S2: The front and rear clamps clamp the two ends of the lower bracket for initial positioning and fixation;

[0026] S3: The left and right clamps drive the left and right clamping plates to clamp the left and right sides of the suspended lower bracket.

[0027] S4: The upper and lower clamps move up and down to fix the lower suspension bracket in place, thus fixing the lower suspension support in place and facilitating the processing of the lower suspension bracket.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] This invention uses a positioning component with synchronized movement to position and pre-clamp the lower suspension bracket in the front-back direction, and utilizes ratchet and pawl for self-locking and anti-reverse. A motor-driven screw drives a screw block with opposite threads, enabling the left and right clamping plates to reliably perform left-right clamping actions. During clamping, rollers allow for fine-tuning of the workpiece to avoid interference. A telescopic cylinder drives the second clamping plate to precisely apply vertical clamping force. Innovatively, an independently controlled leveling mechanism is integrated into the first clamping plate, with a motor-driven rack and pinion precisely adjusting the height of the leveling plate. This allows the required machining angle of the workpiece to be preset and rigidly locked before clamping. This locked height moves synchronously with the clamping plates during subsequent left-right clamping and remains constant, thus stably supporting the workpiece for high-precision machining of complex non-parallel or perpendicular surfaces. This clamping method, with coordinated action in the front-back, left-right, and vertical dimensions, effectively overcomes the machining deformation problem caused by the weak structural rigidity of the lower suspension bracket, significantly improving positioning accuracy and clamping stability, ensuring the workpiece is firmly secured during machining, and thus guaranteeing high-precision requirements for final machining dimensions and geometric tolerances. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a fixture for processing a suspension lower support.

[0031] Figure 2 This is a schematic diagram of the left and right clamping components in a machining fixture for a suspended lower support;

[0032] Figure 3 This is a schematic diagram of the upper and lower clamping components in a machining fixture for a suspended lower support;

[0033] Figure 4 This is a schematic diagram of the front and rear clamping components in a machining fixture for a suspended lower support;

[0034] Figure 5 for Figure 4 Enlarged view of A in the middle;

[0035] Figure 6 This is a schematic diagram of the leveling mechanism in a fixture for processing a suspended lower support.

[0036] In the diagram: 1. Machining table; 2. Sliding hole one; 3. Left and right clamps; 4. Support rod; 5. Support block; 6. Motor; 7. Screw; 8. Screw block; 9. Clamping plate one; 10. Sliding hole two; 11. Upper and lower clamps; 12. Support plate; 13. Telescopic cylinder; 14. Clamping plate two; 15. Front and rear clamps; 16. C-shaped plate; 17. Rotating rod; 18. Linkage plate one; 19. Linkage rod; 20. Linkage plate two; 21. Slider; 22. Slide rail; 23. Positioning component; 24. Positioning rod; 25. Positioning plate; 26. Roller; 27. Ratchet; 28. Limiting component; 29. ​​Spring; 30. Limiting block; 31. Pawl; 32. Limiting rod; 33. Leveling mechanism; 34. Mounting frame; 35. Motor; 36. Gear; 37. Rack; 38. Adjusting plate. Detailed Implementation

[0037] Please see Figure 1 and Figure 2 In this embodiment of the invention, a suspension lower bracket processing fixture includes a processing table 1. The upper surface of the processing table 1 has a sliding hole 2 extending through to the lower surface in the left-right direction. The lower surface of the processing table 1 is provided with left and right clamps 3. The left and right clamps 3 include support rods 4. Support blocks 5 are fixedly connected to both the left and right ends of the support rods 4. The two support blocks 5 are respectively fixedly connected to the left and right ends of the lower surface of the processing table 1. A motor 6 is fixedly connected to the left side of the left support block 5. A screw 7 is fixedly connected to the output end of the motor 6. The right end of the screw 7 is rotatably connected to the left side of the right support block 5. Screw blocks 8 are threadedly sleeved on both sides of the screw 7 between the two support blocks 5. The screw blocks 8 are movably located inside the sliding hole 2. Clamping plates 9 are installed on both the left and right sides of the upper part of the processing table 1. The threads of the two screw blocks 8 are opposite, and the upper ends of the two screw blocks 8 are respectively fixedly connected to the left and right clamping plates 9. A sliding hole 10 extending through to the right side is provided on the left side of the clamping plate 9 in the front-back direction.

[0038] Motor 6 is connected to the forward and reverse rotation circuit, and it is preferably a servo motor;

[0039] The right end of the screw 7 is rotatably connected to the right support block 5 via a bearing;

[0040] Since the threads of the two screw blocks 8 are opposite, when the screw 7 rotates, the two screw blocks 8 will drive the two clamping plates 9 to move relative to each other or away from each other, thereby clamping the lower bracket in the left and right directions.

[0041] exist Figure 1 and Figure 3 In the middle: the upper surface of the clamping plate 19 is provided with upper and lower clamping parts 11, the upper and lower clamping parts 11 include a support plate 12, the upper surface of the support plate 12 is fixedly connected to a telescopic cylinder 13, the end of the support plate 12 away from the telescopic cylinder 13 is fixedly connected to the upper end of the clamping plate 19, and the telescopic end of the telescopic cylinder 13 is fixedly connected to a clamping plate 2 14, the clamping plate 2 14 is located on the opposite side of the two clamping plates 19.

[0042] The telescopic cylinder 13 is preferably a servo electric cylinder;

[0043] Clamping plate 214 is used to clamp the suspended lower bracket in the vertical direction.

[0044] exist Figure 1 , Figure 4 and Figure 5 In the middle: Both sides of the two clamping plates 9 are provided with front and rear clamping parts 15. The front and rear clamping parts 15 include C-shaped plates 16. The horizontal section of the C-shaped plate 16 is fixed to the upper and lower sides of one side surface of the clamping plate 9. The vertical section of the C-shaped plate 16 is rotatably connected to a rotating rod 17. The end of the rotating rod 17 near the clamping plate 9 is fixed to a linkage plate 18. The C-shaped plate 16 is located outside the linkage plate 18. The upper and lower ends of the side surface of the linkage plate 18 away from the clamping plate 9 are rotatably connected to a linkage rod 19. The end of the linkage rod 19 away from the linkage plate 18 is rotatably connected to a second linkage plate 20. The end of the second linkage plate 20 near the side surface of the clamping plate 9 and near the linkage rod 19 is fixed to a slider 21. The slider 21 near the side surface of the clamping plate 9 is slidably connected to a slide rail 22 in the front and back direction. The slide rail 22 is fixed to one side surface of the clamping plate 9.

[0045] A positioning element 23 is provided on the side surface of the second linkage plate 20 near the first clamping plate 9 and at the end away from the linkage rod 19. The positioning element 23 includes a positioning rod 24, which is movably located inside the second sliding hole 10 and is fixedly connected to the side surface of the second linkage plate 20 near the first clamping plate 9 and at the end away from the linkage rod 19. A positioning plate 25 is fixedly connected to the end of the positioning rod 24 away from the second linkage plate 20. Multiple rollers 26 are evenly embedded and rolled on the front and rear surfaces of the positioning plate 25 from left to right. The rotating rod 17 is away from the clamping plate. One end of the C-shaped plate 16 is fixedly connected to a ratchet 27. A limiting member 28 is provided on the surface of the vertical section of the C-shaped plate 16 away from the clamping plate 19. The limiting member 28 includes a spring 29. A limiting block 30 is fixedly connected to the end of the spring 29 away from the rotating rod 17, and a pawl 31 is fixedly connected to the end of the spring 29 near the rotating rod 17. The pawl 31 is attached to the ratchet 27. A limiting rod 32 is rotatably connected inside the end of the pawl 31 away from the rotating rod 17. Both the limiting block 30 and the limiting rod 32 are fixedly connected to the surface of the vertical section of the C-shaped plate 16 away from the clamping plate 9.

[0046] The following explanation uses the front and rear clamps 15 on the left as a reference: Pawl 31 engages with ratchet 27, allowing ratchet 27 and lever 17 to rotate counterclockwise normally, but not clockwise. After pulling pawl 31 away from ratchet 27, ratchet 27 and lever 17 can rotate clockwise.

[0047] Pushing one positioning component 23 towards the center causes the other positioning component 23 to move synchronously towards the center under the action of the second linkage plate 20, the linkage rod 19, and the first linkage plate 18. That is, the two positioning components 23 will move relative to each other to clamp the lower bracket in the front-back direction. During this process, the rotating rod 17 rotates counterclockwise to prevent the positioning component 23 from becoming loose after clamping.

[0048] After the roller 26 is in contact with the lower suspension bracket, the two clamps 9 can still move left and right, which makes it easy to clamp the lower suspension bracket in the left and right directions.

[0049] exist Figure 1 and Figure 6 In the middle: A leveling mechanism 33 is provided at the lower end of the opposite side surface of each of the two clamping plates 9. The leveling mechanism 33 includes a mounting frame 34, which is fixed to one side surface of the clamping plate 9. A motor 35 is fixed to the front surface of the mounting frame 34, and a gear 36 is fixed to the output end of the motor 35. A rack 37 is slidably connected to the inner side surface of the mounting frame 34 in the vertical direction. The rack 37 is meshed with the gear 36. An adjusting plate 38 is provided at the upper end of the rack 37. The adjusting plate 38 can be fixedly connected to the rack 37 or rotatably connected to it.

[0050] An integrally formed protrusion is fixed to one side of the inner surface of the mounting frame 34. The rack 37 has a groove that matches the protrusion. The protrusion and groove enable the rack 37 to move up and down stably without deviation in other directions.

[0051] Motor 35 is connected to the forward and reverse circuit and has a brake, meaning that the motor shaft cannot rotate after power is cut off.

[0052] The motor 35 is a high-load-bearing servo motor, and its output shaft has sufficient strength and rigidity to resist the radial bending load generated by the downward pressure transmitted through the rack 37 and gear 36. The powerful braking mechanism built into the motor 35 can reliably lock the position of the gear 36 after power failure, preventing the rack 37 from moving accidentally due to the downward pressure. In addition, the sliding fit structure design of the rack 37 in the mounting frame 34 (such as the convex rib and groove) effectively distributes the load and avoids the downward pressure being concentrated on the motor shaft, thereby ensuring that the lower bracket of the suspension is stable and reliable in the leveling position when bearing the processing load.

[0053] After the lower suspension bracket is placed on the two adjusting plates 38, the gear 36 rotates, and the rack 37 drives the adjusting plates 38 to rise and fall, thereby adjusting the end height of the lower suspension bracket and enabling the processing of multiple non-parallel or vertical surfaces.

[0054] The working principle of this invention is as follows: First, the lower suspension bracket is placed on two adjusting plates 38, located between two clamping plates 9. Then, according to the angle requirements of the non-parallel or perpendicular surfaces to be processed, the motors 35 of the two leveling mechanisms 33 are activated respectively. The motors 35 drive the gears 36 to rotate, which drives the racks 37 meshing with them to rise and fall vertically along the guide rail with protrusions and grooves in the mounting frame 34, thereby driving the adjusting plates 38 fixed to the upper end of the racks 37 to rise and fall. By independently adjusting the height of the two adjusting plates 38, the two ends of the lower suspension bracket reach the required height difference (i.e., the required angle), preparing for subsequent processing of non-parallel or perpendicular surfaces. The motors 35 have a built-in brake function, which can reliably lock the position of the adjusting plates 38 after power failure. Manually push the positioning plate 25 of any positioning component 23 towards the workpiece, which drives the linkage rod 19 to move through the linkage plate 20, so that the linkage plate 18 synchronously drives the positioning component 23 on the other side to move towards each other until the rollers on the two positioning plates 25 are moved towards the workpiece. Rod 26 fits tightly against the front and rear sides of the workpiece, completing the initial positioning. During this process, rotating rod 17 is driven counterclockwise by linkage plate 18, and pawl 31 is engaged between the teeth of ratchet 27 under the action of spring 29 to prevent loosening of the clamp. Then, motor 6 is started to drive screw 7 to rotate. Because the two screw blocks 8 drive the left and right clamping plates 9 to move towards each other along the sliding hole direction, the inner side of clamping plate 9 is used to rigidly clamp the left and right sides of the workpiece. At this time, roller 26 allows the workpiece to slide left and right during the clamping process to avoid interference. Finally, control telescopic cylinder 13 to move down and push clamping plate 14 to press down on the top surface of the workpiece to achieve vertical fixation. At this point, the workpiece is completely constrained in three dimensions: front and back (positioning plate 25), left and right (clamping plate 9), and vertical (clamping plate 14), and can be processed. Disassembly is done in reverse: telescopic cylinder 13 retracts to release vertical constraints → motor 6 reverses to separate clamping plate 9 → manually pull pawl 31 to disengage from ratchet 27 and then rotate rod 17 in the opposite direction to drive positioning component 23 to reset.

[0055] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A machining fixture for a lower suspension bracket of an automobile, characterized in that, The machine includes a processing table (1), on which a sliding hole (2) is provided in the left and right directions on the upper surface and extends to the lower surface. The lower surface of the processing table (1) is provided with left and right clamps (3). A clamping plate (9) is installed on both the upper left and right sides of the processing table (1). The clamping plate (9) is provided with a sliding hole (10), and the upper surface of the clamping plate (9) is provided with upper and lower clamps (11). Each of the two clamping plates (9) has a front and rear clamping member (15) on its opposite side surface. The front and rear clamping member (15) includes a C-shaped plate (16). A rotating rod (17) is rotatably connected through the vertical section of the C-shaped plate (16). A linkage plate (18) is fixedly connected to the end of the rotating rod (17) near the clamping plate (9). A linkage rod (19) is rotatably connected to the upper and lower ends of the side surface of the linkage plate (18) away from the clamping plate (9). A linkage plate (20) is rotatably connected to the end of the linkage rod (19) away from the linkage plate (18). A slider (21) is fixedly connected to the side surface of the linkage plate (20) near the clamping plate (9) and the end near the linkage rod (19). A slide rail (22) is slidably connected through the side surface of the slider (21) near the clamping plate (9) in the front and back direction. A positioning member (23) is provided at the side surface of the linkage plate (20) near the clamping plate (9) and the end away from the linkage rod (19). A leveling mechanism (33) is provided on one side surface of each of the two clamping plates (9). The end of the rotating rod (17) away from the clamping plate (9) is fixedly connected to a ratchet (27). A limiting member (28) is provided on the vertical section of the C-shaped plate (16) away from the clamping plate (9). The limiting member (28) includes a spring (29). A limiting block (30) is fixedly connected to the end of the spring (29) away from the rotating rod (17). A pawl (31) is fixedly connected to the end of the spring (29) near the rotating rod (17). A limiting rod (32) is rotatably connected to the end of the pawl (31) away from the rotating rod (17). The pawl (31) is attached to the ratchet (27). The limiting block (30) and the limiting rod (32) are both fixedly connected to the vertical section of the C-shaped plate (16) away from the clamping plate (9).

2. The automotive lower suspension bracket processing fixture according to claim 1, characterized in that, The left and right clamps (3) include a support rod (4), and support blocks (5) are fixed to both the left and right ends of the support rod (4). A motor (6) is fixed to the left surface of the support block (5) on the left side. A screw (7) is fixed to the output end of the motor (6). Screw blocks (8) are threaded on both the left and right sides of the screw (7) located between the two support blocks (5). The upper and lower clamps (11) include a support plate (12), and a telescopic cylinder (13) is fixedly connected to the upper surface of the support plate (12). The telescopic end of the telescopic cylinder (13) is fixedly connected to a clamping plate (14).

3. The automotive lower suspension bracket processing fixture according to claim 1, characterized in that, The positioning component (23) includes a positioning rod (24), and a positioning plate (25) is fixedly connected to one end of the positioning rod (24) away from the linkage plate (20). Multiple rollers (26) are evenly embedded and rolled on the front and rear surfaces of the positioning plate (25) from left to right.

4. A machining fixture for a lower automotive suspension bracket according to claim 1, characterized in that, The horizontal section of the C-shaped plate (16) is fixed to the upper and lower sides of one side surface of the clamping plate (9). The C-shaped plate (16) is located outside the linkage plate (18). The slide rail (22) is fixed to one side surface of the clamping plate (9).

5. A machining fixture for a lower automotive suspension bracket according to claim 2, characterized in that, The two support blocks (5) are respectively fixed to the left and right ends of the lower surface of the processing table (1). The right end of the screw (7) is rotatably connected to the left side of the right support block (5). The screw block (8) is movably located inside the sliding hole (2). The threads of the two screw blocks (8) are opposite, and the upper ends of the two screw blocks (8) are respectively fixed to the left and right clamping plates (9).

6. A machining fixture for a lower automotive suspension bracket according to claim 2, characterized in that, The end of the support plate (12) away from the telescopic cylinder (13) is fixed to the upper end of the clamping plate one (9), and the clamping plate two (14) is located on the opposite side of the two clamping plates one (9).

7. A machining fixture for a lower automotive suspension bracket according to claim 3, characterized in that, The positioning rod (24) is movably located inside the sliding hole (10), and the positioning rod (24) is fixed to the side surface of the linkage plate (20) near the clamping plate (9) and away from the linkage rod (19).

8. A machining fixture for a lower automotive suspension bracket according to claim 1, characterized in that, The leveling mechanism (33) includes a mounting frame (34), which is fixed to one side surface of the clamping plate (9). A motor (35) is fixed to the front surface of the mounting frame (34), and a gear (36) is fixed to the output end of the motor (35). A rack (37) is slidably connected to the inner side surface of the mounting frame (34) in the up-down direction. The rack (37) is meshed with the gear (36), and an adjusting plate (38) is fixed to the upper end of the rack (37).

9. A method for processing a vehicle lower suspension bracket according to any one of claims 1-8, characterized in that, Includes the following steps, S1: Place the lower suspension bracket on the leveling mechanism. Adjust the height of the leveling mechanism according to the angle requirements of the non-parallel or vertical surfaces to be processed, so that the two ends of the lower suspension bracket reach the required height difference. S2: The front and rear clamps clamp the two ends of the lower bracket for initial positioning and fixation; S3: The left and right clamps drive the left and right clamping plates to clamp the left and right sides of the suspended lower bracket. S4: The upper and lower clamps move up and down to fix the lower suspension bracket in place, thus fixing the lower suspension support in place.

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