Subframe positioning fixture

Abstract

The utility model relates to the technical field of automobile part machining, and concretely relates to a subframe positioning fixture, which comprises a base, a plurality of support seats and a pressing cylinder are arranged on the base, a center cylinder is arranged at the center of the base, swing rods are movably arranged at the four top corners of the base respectively, the lower ends of the swing rods extend to the lower side of the base, and the output ends of the center cylinder are hingedly connected with the four swing rods through connecting rods. The utility model can be adapted to various subframes and can be quickly positioned, effectively solving the problem of poor adaptability of traditional fixtures.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing technology, specifically a subframe positioning fixture. Background Technology

[0002] The subframe is a crucial support structure specifically designed to support the front and rear axles and suspension system, and can be considered the core skeleton structure of the front and rear axles. Based on its specific installation location on the vehicle chassis, subframes can be divided into two main categories: front subframes and rear subframes. It's important to note that the subframe is not a complete frame system, but merely an auxiliary support structure that serves to support the front and rear axles and suspension system. Through the subframe, the axles and suspension system can achieve a stable connection with the vehicle's main frame. The primary function of the subframe is to effectively isolate vibrations and noise generated during vehicle operation, reducing the direct transmission of these adverse factors into the passenger compartment, thereby improving ride comfort and quietness. For this reason, subframes are widely used in various luxury sedans and high-performance off-road vehicles to meet the higher demands of high-end users for vehicle comfort and handling.

[0003] In the manufacturing process of subframes, positioning fixtures play a crucial role, as they are needed to position the subframe in a specific spatial location for subsequent processing. Existing fixtures are mostly dedicated to a single machine, meaning one fixture is typically designed for only one specific subframe model. When different subframe models need to be secured, the entire fixture must be replaced, resulting in high costs and long lead times. This process is time-consuming and labor-intensive, leading to low fixture utilization, long production times, and an inability to meet the diverse production needs of modern automobiles. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a subframe positioning fixture that can be adapted to various subframes and can quickly perform positioning, effectively solving the problem of poor adaptability of traditional fixtures and reducing changeover time.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A subframe positioning fixture includes a base, on which several support seats and clamping cylinders are provided. A central cylinder is provided at the center of the base. A rocker arm is movably provided at each of the four corners of the base. The lower end of the rocker arm extends to the bottom of the base. The output end of the central cylinder is hinged to the four rocker arms respectively through a connecting rod.

[0006] Compared with the prior art, the beneficial effects of this utility model are: This invention features a standardized positioning structure on the base, including a central hydraulic cylinder, connecting rod, and swing arm. The central hydraulic cylinder precisely pulls the swing arm via the connecting rod, achieving rapid and effective positioning of the subframe. Subsequently, the clamping hydraulic cylinder and support base work together to achieve rapid and precise positioning of the subframe. Furthermore, by controlling the angle of the swing arm, it can adapt to various subframes, improving its suitability. This series of innovative designs not only significantly improves the efficiency of frame positioning but also greatly enhances its accuracy, making the entire frame positioning process more efficient and precise.

[0007] As a preferred embodiment, a further technical solution of this utility model is: Preferably, the base has a central hole, the output end of the central cylinder extends through the central hole to the bottom of the base and connects to the connecting block below the base, and the four corners of the connecting block are respectively hinged to the connecting rod.

[0008] Preferably, the bottom of the base is provided with guide rods on both sides of the central hole, and the connecting block is provided with guide holes that are adapted to the guide rods.

[0009] Preferably, the base has clearance holes at the positions of the four swing rods, and the swing rods are movably placed in the clearance holes.

[0010] Preferably, the base is provided with a mounting block for each clearance hole, and the mounting block is hinged to the swing arm.

[0011] Preferably, the bottom of the base is provided with a guide block corresponding to each connecting rod, and the bottom of the guide block is provided with a guide groove, and the connecting rod is placed in the guide groove.

[0012] Preferably, a support cylinder is provided at any one of the apex corners of the base near the swing arm, and a support seat is provided at the other apex corners near their respective swing arms.

[0013] Preferably, the base is provided with a clamping cylinder one near each swing arm and a clamping cylinder two near each crossbeam, and the base is provided with a supporting cylinder two for each clamping cylinder two, with the supporting cylinder two placed below the crossbeam.

[0014] Preferably, the connecting rod includes a hinge joint, an adjusting rod, and a fixing rod. The adjusting rod has threaded connectors at both ends. One end of the hinge joint is hinged to the connecting block, and the other end has an internal thread structure that matches the threaded connector at the end of the adjusting rod. One end of the fixing rod is hinged to the swing arm, and the other end also has an internal thread structure that matches the threaded connector at the end of the adjusting rod. The adjusting rod is threadedly connected to the hinge joint and the fixing rod at both ends through the threaded connectors at both ends.

[0015] Preferably, the upper surface of the base is provided with lifting rings. Attached Figure Description

[0016] Figure 1 This is a diagram showing the usage status of this utility model for subframe positioning; Figure 2 This is a schematic diagram of the structure of the components on the upper surface of the base in this utility model. Figure 1 ; Figure 3 This is a schematic diagram of the structure of the components on the upper surface of the base in this utility model. Figure 2 ; Figure 4 This is a schematic diagram of the structure of each component on the lower surface of the base in this utility model. Figure 1 ; Figure 5 This is a schematic diagram of the structure of each component on the lower surface of the base in this utility model. Figure 2 ; Figure 6 This is a schematic diagram of the subframe result; Explanation of reference numerals in the attached drawings: 1. Base; 2. Center hole; 3. Center cylinder; 4. Clearance hole; 5. Swing rod; 6. Positioning block; 7. Connecting block; 8. Mounting groove; 9. Connecting rod; 901. Hinge joint; 902. Adjusting rod; 903. Fixing rod; 10. Mounting block; 11. Guide rod; 12. Guide hole; 13. Guide block; 14. Guide groove; 15. Placement groove; 16. Support cylinder one; 17. Support seat; 18. Clamping cylinder one; 19. Clamping cylinder two; 20. Pressure plate; 21. Support cylinder two; 22. Lifting ring; 23. Anti-misalignment platform; 24. Adjusting hole; 25. Anti-misalignment column; 26. Subframe; 2601. Connecting arm; 2602. Crossbeam; 2603. Positioning hole; 27. Extension rod. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments. The purpose of this description is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0018] A subframe positioning fixture includes a base 1 with a central hole 2 at its center. A central hydraulic cylinder 3 is mounted on the upper surface of the base 1 corresponding to the central hole 2. An extension rod 27 is detachably connected to the output end of the central hydraulic cylinder 3. The lower end of the extension rod 27 passes through the central hole 2 and extends to the bottom of the base 1. Four clearance holes 4 are provided at the four corners of the base 1. A swing rod 5 is movably installed in each clearance hole 4. An annular positioning block 6 is mounted on the upper end of each swing rod 5. The lower end of the swing rod 5 passes through the clearance hole 4 and extends to the bottom of the base 1. In this embodiment, the clearance hole 4 is an elongated hole.

[0019] A connecting block 7 is provided below the base 1. The upper surface of the connecting block 7 is fixedly connected to the lower end of the output end of the central cylinder 3. The four corners of the connecting block 7 are respectively connected to the four swing rods 5 through connecting rods 9.

[0020] The four corners of the connecting block 7 are provided with mounting grooves 8. One end of the connecting rod 9 is placed in the mounting groove 8 and hinged to the mounting groove 8. The other end of the connecting rod 9 is hinged to the lower end of the corresponding swing rod 5.

[0021] The lower surface of the base 1 is provided with a mounting block 10 corresponding to each clearance hole 4, and the mounting block 10 is hinged to the swing rod 5.

[0022] In this embodiment, the base 1 of the base 1 is provided with guide rods 11 on both sides of the central hole 2. The connecting block 7 is provided with guide holes 12 that are adapted to the guide rods 11. The guide rods 11 are slidably inserted into the guide holes 12. When the central cylinder 3 drives the connecting block 7 to rise and fall, the connecting block 7 moves along the guide rods 11 through the cooperation of the guide holes 12 and the guide rods 11.

[0023] The lower surface of the base 1 is also connected to each guide rod 11 and a guide block 13 is connected to it. The bottom of the guide block 13 is provided with a guide groove 14, and the connecting rod 9 is placed in the guide groove 14.

[0024] One of the top corners of the base 1 has a placement groove 15 near the swing arm 5, and a support cylinder 16 is installed in the placement groove 15; the other top corners are respectively provided with support seats 17 near their respective swing arms 5. The support cylinder 16 and the support seats 17 are used to support the subframe 26.

[0025] The base 1 is equipped with a clamping cylinder 18 near each swing arm 5, and a clamping cylinder 29 near each crossbeam 2602. The output ends of the clamping cylinder 18 and the clamping cylinder 29 are equipped with pressure plates 20. The base 1 is equipped with a support cylinder 21 below the crossbeam 2602 for each clamping cylinder 29. The crossbeam 2602 of the subframe 26 is clamped by the cooperation of the clamping cylinder 29 and the support cylinder 21.

[0026] The connecting rod 9 consists of a hinge joint 901, an adjusting rod 902, and a fixing rod 903. The adjusting rod 902 has threaded connectors at both ends. One end of the hinge joint 901 is hinged to the connecting block 7, and the other end has an internal thread structure that matches the threaded connector at the end of the adjusting rod 902. One end of the fixing rod 903 is hinged to the swing rod 5, and the other end also has an internal thread structure that matches the threaded connector at the end of the adjusting rod 902. The adjusting rod 902 is threadedly connected to the hinge joint 901 and the fixing rod 903 at both ends through the threaded connectors at both ends.

[0027] In this embodiment, a number of lifting rings 22 for hoisting are also installed on the upper surface of the base 1.

[0028] In this embodiment, an anti-misalignment platform 23 is provided on the upper surface of the base 1 corresponding to the crossbeam 2602 of the subframe 26. The anti-misalignment platform 23 is located inside one side of the crossbeam 2602 and is used to prevent the subframe 26 from moving longitudinally on the base 1. The anti-misalignment platform 23 has an L-shaped structure, and a strip-shaped adjustment hole 24 is provided on the horizontal section of the anti-misalignment platform 23. The anti-misalignment platform 23 is fixed to the base 1 by screws. Anti-misalignment posts 25 are respectively provided at both ends of the inner side of the crossbeam 2602 on the other side of the subframe 26. The anti-misalignment posts 25 are used to prevent the subframe 26 from moving laterally on the base 1.

[0029] In this embodiment, when used for positioning the subframe 26, the positioning holes 2603 at the ends of the four connecting arms 2601 of the subframe 26 pass through the positioning block 6 and are placed on the support base 17. The central cylinder 3 pulls the connecting block 7 upward, and the connecting block 7 pulls the connecting rod 9 to cause the upper end of the swing rod 5 to converge towards the center to clamp the subframe 26. The output ends of the clamping cylinders 18 near the three support bases 17 simultaneously drive their respective pressure plates 20 to press down. Then, the output end of the support cylinder 16 rises to support the subframe 26 (stopping immediately after the output end contacts the lower surface of the subframe 26). The clamping cylinder 18, which is close to the supporting cylinder 16, drives its pressure plate 20 to press down and clamp the subframe 26, thus completing the positioning of the subframe 26. The output ends of the supporting cylinder 21 extend to support the crossbeam 2602 of the subframe 26 (the output ends of the supporting cylinder 21 stop immediately after contacting the crossbeam 2602). Finally, the output ends of the clamping cylinder 29 drive their respective pressure plates 20 to press on the crossbeam 2602. Through the cooperation of the clamping cylinder 29 and the supporting cylinder 21, the crossbeam 2602 is clamped, and the subframe 26 is fixed.

[0030] In this embodiment, when positioning subframes of different sizes, the position of the connecting block can be adjusted by changing the length of the extension rod, thereby adjusting the angle between the swing arm and the connecting rod to achieve the purpose of adjusting the position of the positioning block.

[0031] This invention features a standardized positioning structure on the base, including a central hydraulic cylinder, connecting rod, and swing arm. The central hydraulic cylinder precisely pulls the swing arm via the connecting rod, achieving rapid and effective positioning of different subframes. Subsequently, the clamping hydraulic cylinder and support base work together to achieve rapid and precise positioning of the subframe. Furthermore, by controlling the angle of the swing arm, it can adapt to various subframes, improving its suitability. This series of innovative designs not only significantly improves the efficiency of frame positioning but also greatly enhances its accuracy, making the entire frame positioning process more efficient and precise.

[0032] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A subframe positioning fixture, comprising a base, on which a plurality of support seats and a clamping cylinder are disposed, characterized in that: A central hydraulic cylinder is located at the center of the base, and swing arms are movably installed at the four corners of the base. The lower ends of the swing arms extend to the bottom of the base, and the output end of the central hydraulic cylinder is hinged to the four swing arms respectively through connecting rods.

2. The subframe positioning fixture according to claim 1, characterized in that: The base has a central hole, and the output end of the central cylinder extends through the central hole to the bottom of the base and connects with the connecting block below the base. The four corners of the connecting block are hinged to the connecting rod.

3. The subframe positioning fixture according to claim 2, characterized in that: The bottom of the base has guide rods on both sides of the central hole, and the connecting block has guide holes that are compatible with the guide rods.

4. The subframe positioning fixture according to claim 1, characterized in that: The base has clearance holes for the four swing arms, and the swing arms can be moved into the clearance holes.

5. The subframe positioning fixture according to claim 4, characterized in that: The base is equipped with a mounting block for each clearance hole, and the mounting block is hinged to the swing arm.

6. The subframe positioning fixture according to claim 1, characterized in that: The bottom of the base is equipped with a guide block corresponding to each connecting rod, and the bottom of the guide block has a guide groove, in which the connecting rod is placed.

7. The subframe positioning fixture according to claim 1, characterized in that: A support cylinder is installed at any one of the apex corners of the base near the swing arm, and a support seat is installed at the other apex corners near their respective swing arms.

8. The subframe positioning fixture according to claim 1, characterized in that: The base has a clamping cylinder one near each swing arm and a clamping cylinder two near each crossbeam. The base also has a supporting cylinder two for each clamping cylinder two, which is located below the crossbeam.

9. The subframe positioning fixture according to claim 2, characterized in that: The connecting rod includes a hinge joint, an adjusting rod, and a fixed rod. The adjusting rod has threaded connectors at both ends. One end of the hinge joint is hinged to the connecting block, and the other end has an internal thread structure that matches the threaded connector at the end of the adjusting rod. One end of the fixed rod is hinged to the rocker arm, and the other end also has an internal thread structure that matches the threaded connector at the end of the adjusting rod. The adjusting rod is threaded to the hinge joint and the fixed rod at both ends through the threaded connectors.

10. The subframe positioning fixture according to claim 1, characterized in that: The upper surface of the base is equipped with lifting rings.

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