Automobile torsion beam bushing counter pressure device

Abstract

The application discloses a car torsion frame bushing counter-pressure equipment and belongs to the technical field of assembling of automobile parts. The equipment comprises a base plate, a frame fixing seat is arranged on the base plate, pressure assembling devices are arranged at the two ends of the frame fixing seat, and a torsion frame is arranged on the frame fixing seat. The pressure assembling device comprises a base, profiling pressure head assemblies and counter-pressure head assemblies are arranged on the two sides of the top surface of the base, the profiling pressure head assemblies and the counter-pressure head assemblies are oppositely arranged, the assembling end of the torsion frame is inserted between the profiling pressure head assemblies and the counter-pressure head assemblies, a bushing is arranged in the profiling pressure head assembly, the profiling pressure head assembly works to press the bushing into the assembling end of the torsion frame, and the counter-pressure head assembly works to push the bushing out of the torsion frame. The application integrates the pressure assembling and disassembling functions, and improves the efficiency and precision of assembling and disassembling of the car torsion frame bushing.

Description

Technical Field

[0001] This application relates to the field of automotive parts assembly technology, and in particular to an automotive torsion frame bushing counter-pressure device. Background Technology

[0002] With the booming development of the automotive industry, the manufacturing technology of automotive parts is also constantly evolving. As one of the key components of the automotive chassis, the refinement of the assembly process of the torsion frame is of paramount importance to improving the overall quality of the vehicle. Among the many assembly stages, the bushing pressing process has always been a key factor restricting production efficiency and product quality.

[0003] Relevant prior art, such as the Chinese patent application "Automatic Alignment and Centering Press-fit Bushing Device for Torsion Beam of a Vehicle" (application number: CN202120505530.7), discloses a device including a base assembly and two press-fitting devices symmetrically mounted on the base assembly. A positioning device for positioning the torsion beam is installed on the base assembly. The press-fitting device includes an upper sliding press-fitting mechanism and a lower sliding mechanism. The upper sliding press-fitting mechanism includes an upper slide plate, a bushing mounting tube fixing device, and a bushing press-fitting device. The upper slide plate and the lower sliding mechanism are connected by a spring-loaded suspension support device. This invention, through the spring-loaded suspension support device, allows the upper sliding press-fitting mechanism to slightly sway in the suspension space, automatically fine-tuning the position of the press-fitting device to find the axis of the bushing mounting tube, enabling the press-fitting axis to move freely in each degree of freedom, and aligning the axis according to the differences in the workpiece.

[0004] Current bushing pressing devices generally meet the requirements for successful bushing pressing, featuring high efficiency, reliable pressing quality, and accurate positioning. However, they do not consider the need for further disassembly and maintenance of the bushing after pressing, or the requirement to test the back pressure after the bushing is assembled with the torsion frame. Existing technical solutions require additional equipment or tools to achieve these functions, making the operation relatively cumbersome. Utility Model Content

[0005] The technical problem to be solved by this application is to provide an automotive torsion frame bushing back pressing device that integrates pressing and disassembly functions, thereby improving the efficiency and accuracy of automotive torsion frame bushing assembly and disassembly.

[0006] The technical solution adopted in this application is as follows: an automotive torsion frame bushing counter-pressing device, including a base plate, a frame mounting seat on the base plate, and pressing devices at both ends of the frame mounting seat, wherein the torsion frame is mounted on the frame mounting seat; the pressing device includes a base, and a conforming pressing head assembly and a counter-pressing head assembly are respectively provided on both sides of the top surface of the base, the conforming pressing head assembly and the counter-pressing head assembly are arranged opposite to each other, the assembly end of the torsion frame extends into the conforming pressing head assembly and the counter-pressing head assembly, the bushing is installed in the conforming pressing head assembly, the conforming pressing head assembly presses the bushing into the assembly end of the torsion frame, and the counter-pressing head assembly pushes the bushing out of the torsion frame.

[0007] Compared with existing technologies, the advantages of this application are as follows: First, it achieves both bushing pressing and disassembly functions using a single device. During bushing pressing, the profile pressing head assembly can be directly used to press the bushing into the assembly end of the torque frame. When bushing disassembly for maintenance or other operations is required, the counter-pressing head assembly simply needs to be activated to push the bushing off the torque frame. This avoids the cumbersome process of transferring torque frames between different devices or changing other tools for disassembly, greatly improving operational convenience, saving operation time, and enhancing overall work efficiency. Furthermore, it eliminates the need for external equipment or tools to complete bushing disassembly and counter-pressure testing, reducing reliance on multiple different tools, lowering the complexity of equipment management, and reducing the risk of production interruptions due to tool incompatibility or lack, resulting in a smoother and more efficient operation process.

[0008] The contour pressing head assembly and the counter-pressing head assembly are arranged opposite each other. This symmetrical layout is conducive to the precise positioning and guidance of the assembly end of the torsion frame during the pressing of the bushing. It ensures that the bushing can be accurately pressed into the assembly end of the torsion frame along the predetermined axial direction, thereby improving the accuracy and quality of pressing and reducing problems such as poor pressing or bushing damage caused by positional deviation. This helps to improve the overall performance and reliability of the torsion frame and bushing after assembly.

[0009] The design of the counter-pressure head assembly can apply a reverse force to the press-fitted bushing, smoothly ejecting it from the torsion frame. This not only enables rapid bushing removal but also allows for the detection of the counter-pressure after the bushing and torsion frame are assembled during the removal process. This provides direct data support for subsequent quality inspection, fault analysis, and assembly process optimization, facilitating the timely detection of potential assembly problems and the implementation of corresponding improvement measures.

[0010] In some embodiments of this application, the base has an L-shaped structure, including a horizontal plate and a vertical plate. A first power cylinder and a counter-pressure head assembly are installed at the end of the horizontal plate away from the vertical plate. The first power cylinder drives the counter-pressure head assembly to move. A contour-following pressure head assembly is installed at the end of the horizontal plate close to the vertical plate.

[0011] The structure of the horizontal and vertical plates provides a stable mounting foundation for the contour pressing head assembly, the counter-pressing head assembly, and the power cylinder, ensuring the stability and reliability of each component during operation, improving the overall rigidity of the equipment, and reducing the impact of vibration and deformation on pressing and counter-pressing operations. Mounting the first power cylinder and the counter-pressing head assembly at the end of the horizontal plate away from the vertical plate, while mounting the contour pressing head assembly at the end of the horizontal plate closer to the vertical plate, allows for good coordination and balance between the power source and the pressing and counter-pressing components. This facilitates precise power transmission and control, improving the accuracy and efficiency of pressing and counter-pressing operations.

[0012] In some embodiments of this application, the counterpressure head assembly includes a flange connector, a spherical pressure head, and a counterpressure positioning post. One end of the flange connector is connected to the output shaft of the first power cylinder, and the other end of the flange connector is provided with a hemispherical groove. One end of the spherical pressure head is connected to the counterpressure positioning post, and the other end of the spherical pressure head is spherically embedded in the hemispherical groove and movably connected to the flange connector.

[0013] The spherical pressure head and flange connector are connected via a hemispherical groove, giving the pressure head assembly a degree of flexibility and adaptability during operation. When applying counter-pressure to the bushing, the spherical pressure head can freely adjust its angle and position within a certain range according to the bushing's shape and stress conditions, thereby better conforming to the bushing surface, improving the effectiveness and reliability of the counter-pressure operation, and reducing the risk of localized stress concentration and bushing damage that may result from rigid connections.

[0014] In some embodiments of this application, the force-applying end of the counter-pressure positioning column has a circular annular structure, the outer diameter of the force-applying end of the counter-pressure positioning column is equal to the outer diameter of the bushing, and the inner diameter of the force-applying end of the counter-pressure positioning column is greater than the inner diameter of the bushing.

[0015] The structural dimensions of the force-applying end of the counter-pressure positioning post are designed to ensure good contact and matching with the outer circumference of the bushing during counter-pressure operations. This guarantees that the counter-pressure is applied evenly to the bushing, preventing deformation or damage due to uneven localized stress. Simultaneously, the larger inner diameter of the positioning post compared to the bushing's inner diameter prevents interference between the counter-pressure positioning post and the bushing's inner bore, ensuring smooth counter-pressure operations and improving the success rate and quality of bushing removal.

[0016] In some embodiments of this application, a sensing sheet metal is provided on one side of the counter-pressure positioning column, and a first sensor is provided on the base, the first sensor sending an optical signal to the sensing sheet metal.

[0017] By installing a sensing sheet metal on one side of the counter-pressure positioning column and using a first sensor to send and receive light signals, the position information of the counter-pressure positioning column can be detected in real time and accurately. This provides reliable data support for the automated control of the equipment, enabling the equipment to automatically adjust the timing and stroke of the counter-pressure operation according to the position of the counter-pressure positioning column, achieving more precise disassembly control, improving the intelligence level and operational accuracy of the equipment, and helping to ensure the smooth progress and quality stability of the disassembly work.

[0018] In some embodiments of this application, the back pressure positioning column is connected to a force sensor. The force sensor connection enables real-time sensing of the back pressure applied to the bushing by the back pressure positioning column and feeds the data back to the equipment control system. This allows operators to intuitively understand the magnitude and changes in the back pressure during disassembly, determine whether the back pressure after the bushing and torsion frame are assembled meets the standard, and promptly detect any abnormalities in the back pressure. If the back pressure is found to be outside the reasonable range, immediate adjustments or repairs can be taken, thereby effectively ensuring assembly quality and providing accurate data for subsequent quality inspection, fault analysis, and optimization of the assembly process.

[0019] In some embodiments of this application, the contouring pressure head assembly includes a positive pressure positioning post, a support base, and a contouring pressure sleeve. The support base is provided on the base, and the contouring pressure sleeve is mounted on the base via the support base. The positive pressure positioning post is installed inside the contouring pressure sleeve and is mounted on the base via a floating component. The positive pressure positioning post is inserted into the bushing, which is located inside the contouring pressure sleeve. The inner wall surface of the contouring pressure sleeve is adapted to the assembly end of the torsion frame.

[0020] The inner wall of the conformal compression sleeve is adapted to the assembly end of the torsion frame, ensuring a tight fit between the bushing and the assembly end of the torsion frame during press-fitting, thus guaranteeing the accuracy and quality of the press-fitting process. Simultaneously, the positive pressure positioning pin is mounted on the base via a floating assembly and inserted into the bushing. This floating installation method allows the positive pressure positioning pin to automatically adjust its position within a certain range to accommodate the bushing's mounting hole position and axial deviation, ensuring that the bushing can be smoothly pressed into the assembly end of the torsion frame during the press-fitting process, improving the equipment's adaptability and the reliability of the press-fitting operation.

[0021] In some embodiments of this application, the conforming pressure sleeve is mounted on the horizontal plate, a support seat is provided between the conforming pressure sleeve and the horizontal plate, and the positive pressure positioning column is mounted on the vertical plate through a floating component.

[0022] The support base provides additional support and stability to the conformal compression sleeve, ensuring it maintains a stable position and posture during press-fitting. This reduces deformation or displacement caused by press-fitting forces, thereby improving the accuracy and reliability of the press-fitting operation. The positive pressure positioning post, mounted on the vertical plate via a floating assembly, automatically adjusts its position and angle according to the actual condition of the bushing during press-fitting, better adapting to the bushing's installation requirements and further improving the press-fitting effect and quality.

[0023] In some embodiments of this application, one end of the positive pressure positioning post faces the opening side of the conformal pressure sleeve, and the other end of the positive pressure positioning post is mounted on the front fixed plate. The front fixed plate is connected to the floating assembly, and the conformal pressure sleeve is sleeved outside the front fixed plate. The outer diameter of the front fixed plate is adapted to the inner diameter of the conformal pressure sleeve. The positive pressure positioning post, the front fixed plate, and the conformal pressure sleeve are coaxially arranged.

[0024] The coaxial arrangement of the positive pressure positioning post, the front fixed plate, and the conformal pressure sleeve, along with the compatibility between the outer diameter of the front fixed plate and the inner diameter of the conformal pressure sleeve, ensures good coaxiality among these components during press-fitting. This helps guarantee that the bushing's axis is perfectly aligned with the axis of the torsion frame assembly end when it is pressed into the frame, thereby improving the bushing's press-fitting accuracy and reducing problems such as poor press-fitting, bushing damage, and unstable performance after the torsion frame and bushing are assembled due to axial deviation. This effectively enhances press-fitting quality and post-assembly reliability.

[0025] In some embodiments of this application, a sensing component is provided on the base, and the sensing component is located close to the conforming pressure head assembly. The sensing component includes a proximity switch and a second sensor. The proximity switch is used to detect whether the bushing is installed inside the conforming pressure head assembly, and the second sensor is used to detect the movement stroke of the conforming pressure bushing.

[0026] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description

[0027] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0028] Figure 1 This is a schematic diagram of the structure of this application;

[0029] Figure 2 This is a top view of this application;

[0030] Figure 3 This is a structural diagram illustrating the working state of this application;

[0031] Figure 4 This is a sectional view of the bushing in its unassembled state.

[0032] Figure 5 This is a sectional view of the lining after assembly.

[0033] The specific reference numerals in the attached drawings are explained as follows: 1. Base plate; 2. Frame mounting seat; 3. Pressing device; 4. Torque frame; 5. Contouring press head assembly; 6. Counter-press head assembly; 7. Bushing; 8. Base; 9. Horizontal plate; 10. Vertical plate; 11. First power cylinder; 12. Flange connector; 13. Spherical press head; 14. Counter-pressure positioning post; 15. Induction sheet metal; 16. First sensor; 18. Positive pressure positioning post; 19. Support seat; 20. Contouring press sleeve; 21. Floating assembly; 22. Front fixed plate; 23. Induction assembly; 24. Second power cylinder; 25. Upper plate; 26. Middle plate. Detailed Implementation

[0034] The present application will now be described in detail with reference to the accompanying drawings.

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] Automotive torsion frame bushing counter-pressure equipment, Example 1 as follows Figures 1 to 3 As shown: The device includes a base plate 1, on which a frame mounting base 2 is mounted. Press-fitting devices 3 are located at both ends of the frame mounting base 2. A torsion frame 4 is mounted on the frame mounting base 2. The press-fitting device 3 includes a base 8. A contouring press head assembly 5 and a counter-press head assembly 6 are respectively located on both sides of the top surface of the base 8. The contouring press head assembly 5 and the counter-press head assembly 6 are arranged opposite to each other. The assembly end of the torsion frame 4 extends between the contouring press head assembly 5 and the counter-press head assembly 6. This symmetrical layout facilitates precise positioning and guidance of the assembly end of the torsion frame 4 during the press-fitting of the bushing 7, ensuring that the bushing 7 can be accurately pressed into the assembly end of the torsion frame 4 along the predetermined axial direction. This improves the precision and quality of the press-fitting, reduces problems such as poor press-fitting or damage to the bushing 7 caused by positional deviations, and helps improve the overall performance and reliability of the assembled torsion frame 4 and bushing 7.

[0037] The bushing 7 is installed inside the conforming pressure head assembly 5. The conforming pressure head assembly 5 presses the bushing 7 into the assembly end of the torque frame 4, while the counter-pressure head assembly 6 pushes the bushing 7 out of the torque frame 4. This single device simultaneously performs the pressing and disassembly of the bushing 7. When pressing the bushing 7, the conforming pressure head assembly 5 can be used directly to press it into the assembly end of the torque frame 4. When disassembling the bushing 7 for maintenance or other operations, only the counter-pressure head assembly 6 needs to be activated to push the bushing 7 out of the torque frame 4. This avoids the cumbersome process of transferring the torque frame 4 between different devices or changing other tools for disassembly, greatly improving operational convenience, saving operation time, and enhancing overall work efficiency. The disassembly and counter-pressure testing of the bushing 7 do not require other external equipment or tools, reducing reliance on multiple different tools, lowering the complexity of equipment management, and reducing the risk of production interruptions due to tool incompatibility or lack, making the operation process smoother and more efficient.

[0038] Example 2, as Figures 1 to 5 As shown, the base 8 has an L-shaped structure and includes a horizontal plate 9 and a vertical plate 10. A first power cylinder 11 and a counter-pressure head assembly 6 are mounted on the end of the horizontal plate 9 furthest from the vertical plate 10. The first power cylinder 11 drives the counter-pressure head assembly 6 to move. A contouring pressure head assembly 5 is mounted on the end of the horizontal plate 9 closest to the vertical plate 10. The structure of the horizontal plate 9 and the vertical plate 10 provides a stable mounting foundation for the contouring pressure head assembly 5, the counter-pressure head assembly 6, and the power cylinder, ensuring the stability and reliability of each component during operation, improving the overall rigidity of the equipment, and reducing the impact of vibration and deformation on pressing and counter-pressing operations. Mounting the first power cylinder 11 and the counter-pressure head assembly 6 on the end of the horizontal plate 9 furthest from the vertical plate 10, while mounting the contouring pressure head assembly 5 on the end of the horizontal plate 9 closest to the vertical plate 10, allows for good coordination and balance between the power source and the pressing and counter-pressing components, facilitating precise power transmission and control, and improving the accuracy and efficiency of pressing and counter-pressing operations.

[0039] The counterpressure head assembly 6 includes a flange connector 12, a spherical pressure head 13, and a counterpressure positioning post 14. One end of the flange connector 12 is connected to the output shaft of the first power cylinder 11, and the other end of the flange connector 12 is provided with a hemispherical groove. One end of the spherical pressure head 13 is connected to the counterpressure positioning post 14, and the other end of the spherical pressure head 13 is spherically embedded in the hemispherical groove and movably connected to the flange connector 12. The movable connection between the spherical pressure head 13 and the flange connector 12 through the hemispherical groove gives the counterpressure head assembly 6 a certain degree of flexibility and adaptability during operation. When counterpressure is applied to the bushing 7, the spherical pressure head 13 can freely adjust its angle and position within a certain range according to the shape and stress of the bushing 7, thereby better conforming to the surface of the bushing 7, improving the effect and reliability of the counterpressure operation, and reducing the risk of local stress concentration and damage to the bushing 7 that may be caused by rigid connection.

[0040] The force-applying end of the counter-pressure positioning post 14 has a circular structure. The outer diameter of the force-applying end of the counter-pressure positioning post 14 is equal to the outer diameter of the bushing 7, and the inner diameter of the force-applying end of the counter-pressure positioning post 14 is larger than the inner diameter of the bushing 7. This structural dimension setting of the force-applying end of the counter-pressure positioning post 14 ensures good contact and matching with the outer circumferential surface of the bushing 7 during counter-pressure operation, ensuring that the counter-pressure is applied evenly to the bushing 7 and preventing deformation or damage to the bushing 7 due to uneven local stress. Simultaneously, the larger inner diameter of the post 14 than the inner diameter of the bushing 7 prevents interference between the counter-pressure positioning post 14 and the inner hole of the bushing 7, ensuring smooth counter-pressure operation and improving the success rate and quality of bushing 7 disassembly.

[0041] A sensing sheet metal 15 is provided on one side of the counter-pressure positioning post 14, and a first sensor 16 is provided on the base 8. The first sensor 16 sends an optical signal to the sensing sheet metal 15. By providing the sensing sheet metal 15 on one side of the counter-pressure positioning post 14 and using the first sensor 16 to send and receive optical signals, the position information of the counter-pressure positioning post 14 can be detected in real time and accurately. This provides reliable data support for the automated control of the equipment, enabling the equipment to automatically adjust the timing and stroke of the counter-pressure operation according to the position of the counter-pressure positioning post 14, achieving more precise disassembly control, improving the intelligence level and operational accuracy of the equipment, and helping to ensure the smooth progress and quality stability of the disassembly work.

[0042] The back pressure positioning column 14 is connected to a force sensor. The force sensor can sense the back pressure applied to the bushing 7 by the back pressure positioning column 14 in real time and feed the data back to the equipment control system. This allows operators to intuitively understand the magnitude and changes in the back pressure during disassembly, determine whether the back pressure after the bushing 7 and torsion frame 4 are assembled meets the standard, and promptly detect any abnormalities in the back pressure. Once it is found that the back pressure is outside the reasonable range, measures can be taken immediately for adjustment or handling, thereby effectively ensuring assembly quality and providing accurate data for subsequent quality inspection, fault analysis, and optimization of the assembly process.

[0043] The rest of the contents of Example 2 are the same as those of Example 1.

[0044] Example 3, as Figures 1 to 5 As shown, the contouring press head assembly 5 includes a positive pressure positioning post 18, a support base 19, and a contouring press sleeve 20. The support base 19 is provided on the base 8, and the contouring press sleeve 20 is mounted on the base 8 via the support base 19. The positive pressure positioning post 18 is installed inside the contouring press sleeve 20 and is mounted on the base 8 via a floating assembly 21. The positive pressure positioning post 18 is inserted into the bushing 7, which is located inside the contouring press sleeve 20. The inner wall surface of the contouring press sleeve 20 is adapted to the assembly end of the torque frame 4. This adaptation ensures that the bushing 7 and the assembly end of the torque frame 4 are tightly fitted during press-fitting, guaranteeing the accuracy and quality of the press-fitting process. Meanwhile, the positive pressure positioning column 18 is installed on the base 8 through the floating component 21 and inserted into the bushing 7. This floating installation method allows the positive pressure positioning column 18 to automatically adjust its position within a certain range to adapt to the mounting hole position and axis deviation of the bushing 7, ensuring that the bushing 7 can be smoothly pressed into the assembly end of the torsion frame 4 during the pressing process, thereby improving the adaptability of the equipment and the reliability of the pressing work.

[0045] The conforming compression sleeve 20 is mounted on the horizontal plate 9, and a support base 19 is provided between the conforming compression sleeve 20 and the horizontal plate 9. The positive pressure positioning column 18 is mounted on the vertical plate 10 via a floating component 21. The support base 19 provides additional support and stability for the conforming compression sleeve 20, ensuring that the conforming compression sleeve 20 maintains a stable position and posture during the pressing process, reducing deformation or displacement of the conforming compression sleeve 20 caused by the pressing force, thereby improving the accuracy and reliability of the pressing operation. The positive pressure positioning column 18 is mounted on the vertical plate 10 via the floating component 21, allowing the positive pressure positioning column 18 to automatically adjust its position and angle according to the actual situation of the bushing 7 during pressing, better adapting to the installation requirements of the bushing 7, and further improving the pressing effect and quality.

[0046] One end of the positive pressure positioning post 18 faces the opening side of the conformal compression sleeve 20, and the other end of the positive pressure positioning post 18 is mounted on the front fixed plate 22. The front fixed plate 22 is connected to the floating component 21, and the conformal compression sleeve 20 is sleeved on the front fixed plate 22. The outer diameter of the front fixed plate 22 is adapted to the inner diameter of the conformal compression sleeve 20. The positive pressure positioning post 18, the front fixed plate 22, and the conformal compression sleeve 20 are coaxially arranged. The coaxial arrangement of the positive pressure positioning post 18, the front fixed plate 22, and the conformal compression sleeve 20, as well as the adaptation of the outer diameter of the front fixed plate 22 to the inner diameter of the conformal compression sleeve 20, ensures that good coaxiality is maintained among the positive pressure positioning post 18, the front fixed plate 22, and the conformal compression sleeve 20 during the pressing process. This helps ensure that when the bushing 7 is pressed into the assembly end of the torsion frame 4, its axis is highly coincident with the axis of the assembly end of the torsion frame 4, thereby improving the pressing accuracy of the bushing 7, reducing problems such as poor pressing, damage to the bushing 7, and unstable performance after the torsion frame 4 and bushing 7 are assembled due to axis deviation, and effectively improving the pressing quality and the reliability after assembly.

[0047] A sensing component 23 is provided on the base 8, and the sensing component 23 is located close to the conforming pressure head assembly 5. The sensing component 23 includes a proximity switch and a second sensor. The proximity switch is used to detect whether the bushing 7 is installed in the conforming pressure head assembly 5, and the second sensor is used to detect the movement stroke of the conforming pressure sleeve 20.

[0048] The pressing device 3 includes a middle plate 26, an upper plate 25, and a second power cylinder 24. A slider is mounted on the middle plate 26 and fixed above it. A base 8 is mounted on the upper plate 25 and fixedly connected to it. A slide rail is provided on the lower surface of the upper plate 25, and the slider is installed below the slide rail. The output end of the second power cylinder 24 is connected to the upper plate 25. The second power cylinder 24 drives the upper plate 25 to move relative to the middle plate 26 along the slide rail. By driving the upper plate 25 to move along the slide rail, the second power cylinder 24 drives the base 8 and the contour pressing head assembly 5 and the counter-pressing head assembly 6 mounted on it to move as a whole, achieving precise displacement control of the pressing device 3. The cooperation between the slider and the slide rail ensures smooth and straight movement of the upper plate 25, reducing swaying and deviation during movement, and ensuring the stability and accuracy of the pressing process.

[0049] Two stops are respectively provided on the middle plate 26, located on both sides of the slide rail. A front buffer and a rear buffer are provided on both sides of the upper plate 25, with the stops positioned between them. The front and rear buffers face the stops. The stops, front buffers, and rear buffers form an effective buffering and limiting system. When the upper plate 25 moves on the slide rail, the front and rear buffers provide early buffering as the upper plate 25 approaches the stops, reducing the impact force and preventing damage or excessive vibration caused by a hard collision between the upper plate 25 and the stops. Simultaneously, the stops also provide a clear limiting function, restricting the movement range of the upper plate 25, ensuring that the pressing device 3 operates within the specified stroke, improving the reliability and safety of the equipment, and extending its service life.

[0050] The frame mounting base 2 includes two sets of support components, which are symmetrically arranged on the left and right sides and positioned close to the pressing device 3. These two symmetrically arranged support components provide uniform and stable support force to the torsion frame 4, ensuring that the torsion frame 4 remains horizontal and stable during pressing and counter-pressing operations, preventing tilting or swaying of the torsion frame 4 from affecting the accuracy of pressing and counter-pressing. The close proximity of the support components to the pressing device 3 allows the pressing device 3 to operate more directly and effectively on the assembly end of the torsion frame 4, reducing force loss and operational errors that may occur due to excessive distance, and improving the overall performance and assembly quality of the equipment.

[0051] The other contents of Example 3 are the same as those of Example 1 or Example 2.

[0052] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A reverse pressure device for automotive torsion frame bushings, characterized in that, The system includes a base plate (1), on which a frame mounting base (2) is provided. Press-fitting devices (3) are provided at both ends of the frame mounting base (2). A torsion frame (4) is mounted on the frame mounting base (2). The press-fitting device (3) includes a base (8). A contouring press head assembly (5) and a counter-press head assembly (6) are respectively provided on both sides of the top surface of the base (8). The contouring press head assembly (5) and the counter-press head assembly (6) are arranged opposite to each other. The assembly end of the torsion frame (4) extends into the space between the contouring press head assembly (5) and the counter-press head assembly (6). A bushing (7) is installed inside the contouring press head assembly (5). When the contouring press head assembly (5) works, it presses the bushing (7) into the assembly end of the torsion frame (4). When the counter-press head assembly (6) works, it pushes the bushing (7) out of the torsion frame (4).

2. The automotive torsion frame (4) bushing (7) counter-pressure device according to claim 1, characterized in that, The base (8) has an L-shaped structure and includes a horizontal plate (9) and a vertical plate (10). A first power cylinder (11) and a counter-pressure head assembly (6) are installed at the end of the horizontal plate (9) away from the vertical plate (10). The first power cylinder (11) drives the counter-pressure head assembly (6) to move. A contour-following pressure head assembly (5) is installed at the end of the horizontal plate (9) close to the vertical plate (10).

3. The automotive torsion frame (4) bushing (7) counter-pressure device according to claim 2, characterized in that, The counterpressure head assembly (6) includes a flange connector (12), a spherical pressure head (13), and a counterpressure positioning column (14). One end of the flange connector (12) is connected to the output shaft of the first power cylinder (11), and the other end of the flange connector (12) is provided with a hemispherical groove. One end of the spherical pressure head (13) is connected to the counterpressure positioning column (14), and the other end of the spherical pressure head (13) is embedded in the hemispherical groove in a spherical structure and is movably connected to the flange connector (12).

4. The automotive torsion frame (4) bushing (7) counter-pressure device according to claim 3, characterized in that, The force-applying end of the counter-pressure positioning column (14) has a circular structure. The outer diameter of the force-applying end of the counter-pressure positioning column (14) is equal to the outer diameter of the bushing (7), and the inner diameter of the force-applying end of the counter-pressure positioning column (14) is greater than the inner diameter of the bushing (7).

5. The automotive torsion frame (4) bushing (7) counter-pressure device according to claim 3, characterized in that, A sensing sheet metal (15) is provided on one side of the counter-pressure positioning column (14), and a first sensor (16) is provided on the base (8). The first sensor (16) sends a light signal to the sensing sheet metal (15).

6. The automotive torsion frame (4) bushing (7) counter-pressure device according to claim 3, characterized in that, The counter-pressure positioning column (14) is connected to the force sensor.

7. The automotive torsion frame (4) bushing (7) counter-pressure device according to claim 1, characterized in that, The contouring pressure head assembly (5) includes a positive pressure positioning column (18), a support base (19), and a contouring pressure sleeve (20). The support base (19) is provided on the base (8). The contouring pressure sleeve (20) is installed on the base (8) through the support base (19). The positive pressure positioning column (18) is installed inside the contouring pressure sleeve (20). The positive pressure positioning column (18) is installed on the base (8) through the floating component (21). The positive pressure positioning column (18) is inserted into the bushing (7). The bushing (7) is located inside the contouring pressure sleeve (20). The inner wall surface of the contouring pressure sleeve (20) is adapted to the assembly end of the torsion frame (4).

8. The automotive torsion frame (4) bushing (7) counter-pressure device according to claim 7, characterized in that, The contouring sleeve (20) is installed on the horizontal plate (9), and a support seat (19) is provided between the contouring sleeve (20) and the horizontal plate (9). The positive pressure positioning column (18) is installed at the vertical plate (10) through the floating component (21).

9. The automotive torsion frame (4) bushing (7) counter-pressure device according to claim 7, characterized in that, One end of the positive pressure positioning post (18) faces the opening side of the conforming pressure sleeve (20), and the other end of the positive pressure positioning post (18) is installed on the front fixed plate (22). The front fixed plate (22) is connected to the floating component (21). The conforming pressure sleeve (20) is sleeved on the front fixed plate (22). The outer diameter of the front fixed plate (22) is adapted to the inner diameter of the conforming pressure sleeve (20). The positive pressure positioning post (18), the front fixed plate (22), and the conforming pressure sleeve (20) are coaxially arranged.

10. The automotive torsion frame (4) bushing (7) counter-pressure device according to claim 1, characterized in that, A sensing component (23) is provided on the base (8). The sensing component (23) is located close to the contour pressing head assembly (5). The sensing component (23) includes a proximity switch and a second sensor.

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