Axle spring press fitting device

Abstract

The utility model relates to the technical field of axle spring press -mounting technique provides a kind of axle spring press -mounting device, including device frame body, pressing block and fixed clamping jaw, the inside of device frame body is provided with screw rod, the top of screw rod protrudes from the top of device frame body, the bottom of screw rod is connected with fixed bearing seat, and fixed bearing seat is installed in the inside of device frame body, the outside of screw rod is connected with moving block, and one end of moving block is equipped with upper support, the bottom of upper support is provided with pressing block, and horizontal moving assembly is arranged between upper support and pressing block, the other end of moving block is provided with guide assembly, the utility model is by linear guide rail, linear slider and the horizontal moving assembly of extension spring, can automatically adapt and offset the slight displacement of spring steel plate along length direction when being pressed, ensure that the pressure point is always perpendicular to the force center of spring steel plate, solve the problem that traditional rigid pressure head is easy to produce eccentric load, and uneven distribution of press -mounting force, guarantee bolt pre-tightening force consistency.

Description

Technical Field

[0001] This utility model relates to the field of axle spring press-fitting technology, and in particular to an axle spring press-fitting device. Background Technology

[0002] The intelligent servo press-fitting system for axle springs is a core precision assembly equipment for commercial vehicle / passenger vehicle axle assemblies. It primarily completes the constant force, constant stroke, and pressure holding press-fitting of suspension coil springs, leaf springs, and axle housings / supports, achieving integrated operations of spring preload, hole alignment, and bolt tightening to ensure suspension stiffness, ride comfort, and driving safety. The equipment is suitable for multi-model mixed-line production of front axles, rear axles, and steering axles, covering axle assembly scenarios for light trucks, heavy trucks, and buses. Currently, the press-fitting of axle springs has the following defects: During compression, spring steel plates inevitably undergo slight elastic deformation along their length. Existing press-fitting equipment often uses a rigid, fixed press head structure, which cannot adjust the press point position synchronously with the spring steel plate's displacement. This results in the press point not always acting perpendicularly to the center of force on the spring steel plate, leading to severe uneven pressing load problems. Uneven loading causes uneven force distribution, directly resulting in insufficient alignment accuracy of the spring steel plate and poor consistency in bolt preload, affecting the assembly accuracy of the suspension system. Long-term use can cause fatigue fracture of the spring steel plate due to uneven stress, posing a significant driving safety hazard. Furthermore, uneven loading exacerbates abnormal wear on the press head, lead screw, and guide mechanism, significantly shortening the equipment's service life. The dimensions and specifications of spring steel plates vary significantly between different vehicle models and tonnages, requiring the use of corresponding pressure heads and clamping jaws. Currently, the pressure heads and clamping jaws of existing equipment are generally installed by directly fastening them to the main body of the equipment with multiple bolts. Disassembly and replacement require disassembling parts of the equipment structure, making the operation complex and time-consuming. The lengthy process of changing tools significantly impacts the changeover efficiency of multi-product mixed-line production. Utility Model Content

[0003] The purpose of this utility model is to provide an axle spring pressing device, which solves the above-mentioned problems when used in operation.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A vehicle axle spring pressing device includes a device frame, a pressing block, and a fixed clamp. A lead screw is installed inside the device frame, with the top of the lead screw protruding from the top of the device frame. A fixed bearing seat is connected to the bottom of the lead screw and is installed inside the device frame. A moving block is threaded to the outside of the lead screw. An upper bracket is installed at one end of the moving block. A pressing block is installed at the bottom of the upper bracket. A transverse moving component is installed between the upper bracket and the pressing block. A guide component is installed at the other end of the moving block. A fixed clamp is installed on one side of the bottom of the device frame. A material sensor is installed on the inner bottom wall of the fixed clamp. Replacement components are installed between the upper bracket and the moving block, and between the fixed clamp and the device frame. An upper frame is installed on the top of the device frame. A reducer is installed inside the upper frame. A coupling is installed at the bottom of the reducer. The reducer is connected to the lead screw through the coupling. A servo motor is installed on one side of the reducer.

[0005] Preferably, an auxiliary handle is installed at one end of the device frame, an operating handle is installed on the other side of the device frame, a connecting flange is provided at the top of the upper frame, a cross swing joint is provided between the connecting flange and the upper frame, and the connecting flange is connected to the upper frame through the cross swing joint.

[0006] Preferably, the transverse component includes a linear guide rail fixed to the bottom of the upper bracket, a linear slider slidably connected to the bottom of the linear guide rail, the linear slider being located on top of the pressure block and fixedly connected thereto, an L-shaped connecting block fixed to one end of the linear slider, a connecting pin fixed to one end of the L-shaped connecting block, a tension spring provided on one side of the linear guide rail, one end of the tension spring being connected to the connecting pin, and a stop block fixed to one end of the linear guide rail, the stop block corresponding to the position of the L-shaped connecting block.

[0007] Preferably, the guide assembly includes a connecting plate fixed to one end of the movable block, the connecting plate being placed inside the device frame, guide sliders being installed on both sides of the connecting plate, guide rails being installed on both sides inside the device frame, and the guide sliders being slidably connected to the guide rails.

[0008] Preferably, a position switch one is installed at the bottom of one side of the device frame, and a position switch two is installed at the top of one side of the device frame. The sensing ends of position switch one and position switch two extend into the interior of the device frame. A trigger block is installed at the end of the connecting plate. The trigger block is directly opposite and in contact with the sensing end of position switch two. Position switch one is located directly below position switch two.

[0009] Preferably, the replacement component includes limiting grooves on both sides of the movable block, two fixing holes are opened inside the movable block, a limiting block is fixed inside the limiting groove, the limiting block is fixed to both sides of one end of the upper bracket, and two connecting holes are opened inside each limiting block. The two connecting holes inside the limiting block are aligned with the fixing holes, and fixing bolts are installed inside the fixing holes and connecting holes.

[0010] Preferably, the replacement component also includes two sets of connection holes 2 opened on both sides of the bottom of the device frame. Each set of connection holes 2 is provided with three holes. The bottom of the fixed claw is fixed with a support base. The two sides of the support base facing one end of the device frame are fixed with mounting plates. Each mounting plate has three fixing holes 2 inside. The fixing holes 2 inside the mounting plate are aligned with the connection holes 2. Fixing bolts 2 are installed inside the fixing holes 2 and the connection holes 2.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides an axle spring pressing device, which, through a transverse component composed of a linear guide rail, a linear slider, and a tension spring, can automatically adapt to and counteract the slight displacement generated along the length direction when the spring steel plate is pressed, ensuring that the pressing point always acts perpendicularly to the force center of the spring steel plate. This solves the problems of uneven load distribution and uneven pressing force distribution that are easily generated by traditional rigid pressing heads, and ensures the consistency of bolt preload. The transmission system of servo motor and lead screw, combined with the guide slider and guide rail mechanism arranged symmetrically on both sides, effectively constrains the radial movement and torsional tendency of the moving block, strictly ensures the straightness and perpendicularity of the pressing block movement, and greatly improves the centering accuracy of the spring steel plate and the stability of the pressing quality.

[0012] 2. This utility model provides an axle spring pressing device. Through a cross-shaped swing joint between the connecting flange and the upper frame, the overall adaptation angle of the device is adjusted to ensure that the pressing direction is completely consistent with the force direction of the spring steel plate, adapting to the assembly posture differences of axles of different vehicle models. An integrated material sensor automatically detects the workpiece's position, and the pressing process is completed automatically. After pressing, the tension spring drives the transverse movement component to automatically reset, and the servo system drives the pressing block to automatically return to its original position, reducing manual intervention steps. Both the pressing block and the fixing claw adopt a quick-change design of "plug-in + bolt fastening," eliminating the need to disassemble the main body of the equipment. A single person can complete the tooling change within minutes, significantly shortening the tooling changeover time in multi-variety production and meeting the needs of flexible production.

[0013] 3. The axle spring pressing device provided by this utility model is equipped with a dual-stroke limit system consisting of position switch one (lower limit), position switch two (upper limit), and trigger block. It can accurately limit the upper and lower limit movement range of the pressing block, effectively prevent the screw and nut pair from jamming, mechanical collision of equipment, and workpiece overpressure damage, and ensure the safety of equipment and operators. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 Partial structural breakdown of this utility model Figure 1 ; Figure 4 Partial structural breakdown of this utility model Figure 2 ; Figure 5 This is a partial structural diagram of the present invention. Figure 1 ; Figure 6 Partial structural breakdown of this utility model Figure 3 ; Figure 7 This is a partial structural diagram of the present invention. Figure 2 ; Figure 8 This is a front structural sectional view of the present invention; Figure 9 This is a partial structural diagram of the present invention. Figure 3 .

[0015] The reference numerals in the diagram are as follows: 1. Frame; 11. Auxiliary handle; 12. Operating handle; 2. Upper frame; 21. Connecting flange; 22. Cross-shaped swing joint; 3. Servo motor; 31. Reducer; 32. Coupling; 33. Lead screw; 34. Fixed bearing seat; 4. Upper bracket; 41. Linear guide rail; 42. Linear slider; 43. L-shaped connecting block; 44. Connecting pin; 45. Tension spring; 46. Stop block; 5. Pressure... 6. Moving block; 61. Limiting groove; 62. Fixing hole one; 63. Limiting block one; 64. Connecting hole one; 65. Fixing bolt one; 7. Fixing gripper; 71. Material sensor; 72. Support base; 73. Mounting plate; 74. Fixing hole two; 75. Connecting hole two; 76. Fixing bolt two; 8. Connecting plate; 81. Guide slider; 82. Guide slide rail; 9. Position switch one; 91. Position switch two; 92. Trigger block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0018] Combination Figures 1 to 9 As shown, this utility model discloses an axle spring pressing device, comprising a device frame 1, a pressing block 5, and a fixing claw 7. A lead screw 33 is disposed inside the device frame 1, with its top protruding beyond the top of the device frame 1. A fixed bearing seat 34 is connected to the bottom of the lead screw 33 and is installed inside the device frame 1. A moving block 6 is threadedly connected to the outside of the lead screw 33. An upper bracket 4 is mounted on one end of the moving block 6. A pressing block 5 is disposed at the bottom of the upper bracket 4. A transverse movement assembly is disposed between the upper bracket 4 and the pressing block 5. A guide component is provided at the other end of the moving block 6. A fixed gripper 7 is installed on one side of the bottom of the device frame 1. A material sensor 71 is provided on the inner bottom wall of the fixed gripper 7. A replacement component is provided between the upper support 4 and the moving block 6, and between the fixed gripper 7 and the device frame 1. An upper frame 2 is installed on the top of the device frame 1. A reducer 31 is provided inside the upper frame 2. A coupling 32 is provided at the bottom of the reducer 31. The reducer 31 is connected to the lead screw 33 through the coupling 32. A servo motor 3 is installed on one side of the reducer 31.

[0019] An auxiliary handle 11 is installed at one end of the device frame 1, and an operating handle 12 is installed on the other side of the device frame 1. A connecting flange 21 is provided on the top of the upper frame 2. A cross swing joint 22 is provided between the connecting flange 21 and the upper frame 2. The connecting flange 21 is connected to the upper frame 2 through the cross swing joint 22.

[0020] Specifically, this device needs to be used in conjunction with the overhead suspension rail system in the workshop. The device is connected to the suspension rail system via connecting flange 21. The cross-shaped swing joint 22 between connecting flange 21 and the upper frame 2 allows for flexible adjustment of the device's adaptation angle, ensuring subsequent pressing accuracy. Activate the suspension rail system to move the device to the designated workstation on the rear axle assembly line. The operator holds the auxiliary handle 11 and the operating handle 12 with both hands respectively, and finely adjusts the position of the device so that the fixed gripper 7 is aligned with the pressure position of the rear axle chassis crossbeam. The device posture is adjusted by the cross swing joint 22 so that the pressing direction is consistent with the force direction of the spring steel plate. When the material sensor 71 detects the workpiece in place signal, the device enters the waiting pressing state. Press the start button on the operating handle 12, the servo motor 3 starts, and after the speed reduction and torque increase by the reducer 31, the torque is transmitted to the lead screw 33 through the coupling 32. The lead screw 33 rotates and drives the moving block 6 connected to it to move downward in a straight line, which drives the pressure block 5 to move down synchronously. It cooperates with the fixed clamp 7 to apply a clamping force to the spring steel plate. During the pressing process, the spring steel plate is compressed and produces a slight displacement along the length direction. The pressure block 5 automatically adapts to and cancels the displacement through the transverse moving component, ensuring that the pressure point always acts accurately on the center of the spring steel plate. When the spring steel plate is pressed down to the preset position, the spring steel plate centering and bolt pre-tightening process is automatically completed. Throughout the pressing process, pressure sensors collect pressing force data in real time, displacement sensors record pressing stroke synchronously, and the system automatically generates pressing curves and stores all process parameters, enabling online quality judgment and full life cycle data traceability of products. After pressing is completed, the servo motor 3 is reversed, and the lead screw 33 drives the moving block 6 and the pressing block 5 to rise to the initial position. The operator moves the fixed gripper 7 from the lower end of the rear axle crossbeam and moves the device to the safe area on the side of the line through the suspension rail system, waiting for the next work cycle.

[0021] like Figure 4 As shown, the transverse component includes a linear guide rail 41 fixed to the bottom of the upper bracket 4. A linear slider 42 is slidably connected to the bottom of the linear guide rail 41. The linear slider 42 is located on the top of the pressure block 5 and is fixedly connected to it. An L-shaped connecting block 43 is fixed to one end of the linear slider 42. A connecting pin 44 is fixed to one end of the L-shaped connecting block 43. A tension spring 45 is provided on one side of the linear guide rail 41. One end of the tension spring 45 is connected to the connecting pin 44. A stop block 46 is fixed to one end of the linear guide rail 41. The position of the stop block 46 corresponds to that of the L-shaped connecting block 43.

[0022] Specifically, the transverse movement assembly of this device consists of a linear guide rail 41, a linear slider 42, an L-shaped connecting block 43, a connecting pin 44, and a tension spring 45. It can realize adaptive displacement compensation during the pressing process and automatic and rapid reset after pressing. The specific working process is as follows: When the spring steel plate is compressed and undergoes a slight displacement along its length, the pressure block 5 will generate a lateral force synchronously with the spring steel plate. This force drives the linear slider 42, which is fixed to the pressure block 5, to slide laterally along the linear guide rail 41, automatically adjusting the pressure point position of the pressure block 5 to counteract the displacement of the spring steel plate, ensuring that the pressure point always acts perpendicularly to the center of force on the spring steel plate, and avoiding uneven loading during pressing. When the linear slider 42 moves laterally, it synchronously drives the L-shaped connecting block 43 and connecting pin 44 fixed to it to move. The connecting pin 44 pulls the tension spring 45 to generate elastic elongation and store elastic potential energy.

[0023] After the pressing operation is completed, the lateral force of the spring steel plate disappears completely. At this time, the tension spring 45 releases the stored elastic potential energy, and pulls the linear slider 42 back along the linear guide rail 41 quickly through the connecting pin 44 and the L-shaped connecting block 43, causing the pressure block 5 to automatically reset to the initial position, preparing for the next pressing cycle.

[0024] The stop block 46 acts as a stop for the linear slider 42, preventing it from detaching from the linear guide rail 41.

[0025] like Figure 3 and Figure 5 As shown, the guide assembly includes a connecting plate 8 fixed to one end of the movable block 6. The connecting plate 8 is placed inside the device frame 1. Guide sliders 81 are installed on both sides of the connecting plate 8. Guide rails 82 are installed on both sides inside the device frame 1. The guide sliders 81 are slidably connected to the guide rails 82.

[0026] Specifically, this device adopts a double-sided symmetrical guide structure, consisting of a connecting plate 8, a guide slider 81, and a guide rail 82, which provides precise guidance for the linear movement of the moving block 6 and ensures a stable and reliable pressing process. When the lead screw 33 rotates and drives the moving block 6 to move up and down in a straight line, the connecting plate 8 connected to the moving block 6 moves synchronously, causing the guide sliders 81 symmetrically installed on both sides to slide smoothly along the guide rails 82 fixed to the frame. This guiding mechanism can effectively constrain the radial movement and torsional tendency of the moving block 6, strictly ensure the straightness and perpendicularity of its movement, and prevent the pressure block 5 from swaying or tilting during the pressing process, thereby ensuring that the pressing force is applied evenly and perpendicularly to the spring steel plate, and guaranteeing the pressing accuracy and consistency.

[0027] like Figure 8 and Figure 9 As shown, a position switch 9 is installed at the bottom of one side of the device frame 1, and a position switch 91 is installed at the top of one side of the device frame 1. The sensing ends of position switches 9 and 91 extend into the interior of the device frame 1. A trigger block 92 is installed at the end of the connecting plate 8. The trigger block 92 is directly opposite and in contact with the sensing end of position switch 91. Position switch 9 is located directly below position switch 91.

[0028] Specifically, this device is equipped with a dual position limit protection system, consisting of position switch 9 (lower limit switch), position switch 91 (upper limit switch) and trigger block 92, which is used to limit the upper and lower limit strokes of the pressure block 5 to prevent overtravel.

[0029] Trigger block 92 is connected to connecting plate 8 and moves up and down synchronously with it: Upper limit trigger: When the trigger block 92 moves up with the connecting plate 8 to the position directly opposite the position switch 91, its sensing end is triggered. The system determines that the pressure block 5 has reached the maximum upward limit position and immediately cuts off the upward circuit of the servo motor 3. Lower limit trigger: When the trigger block 92 moves down with the connecting plate 8 to a position directly opposite the position switch 9, its sensing end is triggered. The system determines that the pressure block 5 has reached the maximum downward limit position and immediately cuts off the downward circuit of the servo motor 3. This limiting mechanism can effectively prevent the pressure block 5 from running over its travel, avoid malfunctions such as jamming of the screw 33 nut pair, mechanical collision of equipment, and workpiece damage, and ensure the safety of the pressing operation and the service life of the equipment.

[0030] like Figure 3 , Figure 6 and Figure 7 As shown, the replacement component includes limiting grooves 61 on both sides of the movable block 6. The movable block 6 has two fixing holes 62 inside. Limiting blocks 63 are fixed inside the limiting grooves 61. The limiting blocks 63 are fixed to both sides of one end of the upper bracket 4. Each limiting block 63 has two connecting holes 64 inside. The two connecting holes 64 inside the limiting block 63 are directly opposite to the fixing holes 62. Fixing bolts 65 are installed inside the fixing holes 62 and the connecting holes 64.

[0031] The replacement components also include two sets of connection holes 75 on both sides of the bottom of the device frame 1. Each set of connection holes 75 has three holes. The bottom of the fixing claw 7 is fixed with a support base 72. The two sides of the support base 72 facing the device frame 1 are fixed with mounting plates 73. Each mounting plate 73 has three fixing holes 74 inside. The fixing holes 74 inside the mounting plate 73 are directly opposite to the connection holes 75. Fixing bolts 76 are installed inside the fixing holes 74 and the connection holes 75.

[0032] Specifically, this device adopts a modular quick-change structure design, and both the pressure block 5 and the fixing claw 7 can be quickly disassembled and replaced to adapt to the pressing requirements of rear axle spring steel plates of different sizes and specifications.

[0033] I. Disassembly and replacement of pressure block 5: Align the limiting blocks 63 on both sides of one end of the upper bracket 4 with the limiting grooves 61 on both sides of the moving block 6, and insert them smoothly until they are fully inserted; confirm that the connecting hole 64 on the limiting block 63 is completely coaxially aligned with the fixing hole 62 on the moving block 6; insert the fixing bolt 65 into the fixing hole 62 and the connecting hole 64 in sequence, and tighten them to the specified torque to complete the rigid connection between the pressure block 5 and the moving block 6.

[0034] Use the corresponding tool to loosen and remove all fixing bolts 65; smoothly pull the upper bracket 4 horizontally to completely disengage the limiting block 63 from the limiting groove 61, and then remove the old pressure block 5.

[0035] Repeat the above installation steps and replace the pressure block 5 with a new one that matches the size of the spring steel plate to be pressed.

[0036] II. Disassembly and replacement of the fixing jaw 7: Insert the mounting plates 73 on both sides of one end of the support base 72 into the corresponding mounting slots at the bottom of the device frame 1; adjust the position of the support base 72 so that the fixing hole 74 on the mounting plate 73 is completely coaxially aligned with the connecting hole 75 on the device frame 1; insert the fixing bolt 76 into the connecting hole 75 and the fixing hole 74 in sequence, and tighten it to the specified torque to complete the connection between the fixing claw 7 and the device frame 1; Use the corresponding tool to loosen and remove all fixing bolts 76; smoothly pull the support base 72 in the horizontal direction so that the mounting plate 73 is completely removed from the mounting groove at the bottom of the device frame 1, and the old fixing claw 7 can be removed. Repeat the above installation steps, and replace the new fixing claw 7 with one that matches the current size of the pressure block 5 to ensure the pressing effect.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vehicle axle spring pressing device, comprising a device frame (1), a pressing block (5), and a fixing claw (7), characterized in that: The device frame (1) is equipped with a lead screw (33) inside. The top of the lead screw (33) protrudes from the top of the device frame (1). The bottom of the lead screw (33) is connected to a fixed bearing seat (34), and the fixed bearing seat (34) is installed inside the device frame (1). The lead screw (33) is threadedly connected to a moving block (6). One end of the moving block (6) is equipped with an upper bracket (4). The bottom of the upper bracket (4) is equipped with a pressure block (5). A transverse moving assembly is provided between the upper bracket (4) and the pressure block (5). The other end of the moving block (6) is equipped with a guide assembly. A fixed gripper (7) is installed on one side of the bottom of the body (1). A material sensor (71) is provided on the inner bottom wall of the fixed gripper (7). A replacement component is provided between the upper bracket (4) and the moving block (6) and between the fixed gripper (7) and the device frame (1). An upper frame (2) is installed on the top of the device frame (1). A reducer (31) is provided inside the upper frame (2). A coupling (32) is provided at the bottom of the reducer (31). The reducer (31) is connected to the lead screw (33) through the coupling (32). A servo motor (3) is installed on one side of the reducer (31).

2. The axle spring pressing device according to claim 1, characterized in that: An auxiliary handle (11) is installed at one end of the device frame (1), and an operating handle (12) is installed on the other side of the device frame (1). A connecting flange (21) is provided on the top of the upper frame (2), and a cross swing joint (22) is provided between the connecting flange (21) and the upper frame (2). The connecting flange (21) is connected to the upper frame (2) through the cross swing joint (22).

3. The axle spring pressing device according to claim 1, characterized in that: The transverse component includes a linear guide rail (41) fixed to the bottom of the upper bracket (4). A linear slider (42) is slidably connected to the bottom of the linear guide rail (41). The linear slider (42) is located on the top of the pressure block (5) and is fixedly connected to it. An L-shaped connecting block (43) is fixed to one end of the linear slider (42). A connecting pin (44) is fixed to one end of the L-shaped connecting block (43). A tension spring (45) is provided on one side of the linear guide rail (41). One end of the tension spring (45) is connected to the connecting pin (44). A stop block (46) is fixed to one end of the linear guide rail (41). The stop block (46) corresponds to the position of the L-shaped connecting block (43).

4. The axle spring pressing device according to claim 1, characterized in that: The guide assembly includes a connecting plate (8) fixed to one end of the moving block (6). The connecting plate (8) is placed inside the device frame (1). Guide sliders (81) are installed on both sides of the connecting plate (8). Guide rails (82) are installed on both sides inside the device frame (1). The guide sliders (81) are slidably connected to the guide rails (82).

5. The axle spring pressing device according to claim 4, characterized in that: A position switch one (9) is installed at the bottom of one side of the device frame (1), and a position switch two (91) is installed at the top of one side of the device frame (1). The sensing ends of the position switch one (9) and the position switch two (91) extend into the interior of the device frame (1). A trigger block (92) is installed at the end of the connecting plate (8). The trigger block (92) and the sensing end of the position switch two (91) are directly opposite and in contact. The position switch one (9) is located directly below the position switch two (91).

6. The axle spring pressing device according to claim 1, characterized in that: The replacement component includes limiting grooves (61) on both sides of the movable block (6). The movable block (6) has two fixing holes (62) inside. The limiting grooves (61) are fixed with limiting blocks (63). The limiting blocks (63) are fixed to both sides of one end of the upper bracket (4). Each limiting block (63) has two connecting holes (64) inside. The two connecting holes (64) inside the limiting block (63) are directly opposite to the fixing holes (62). Fixing bolts (65) are installed inside the fixing holes (62) and the connecting holes (64).

7. The axle spring pressing device according to claim 6, characterized in that: The replacement component also includes two sets of connection holes (75) on both sides of the bottom of the device frame (1). Each set of connection holes (75) has three holes. The bottom of the fixing claw (7) is fixed with a support base (72). The support base (72) is fixed with mounting plates (73) on both sides facing one end of the device frame (1). Each mounting plate (73) has three fixing holes (74) inside. The fixing holes (74) inside the mounting plate (73) are directly opposite to the connection holes (75). Fixing bolts (76) are installed inside the fixing holes (74) and the connection holes (75).

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