Screw tightening and crushing tool for automobile half shaft based on half shaft anti-loosening process

Abstract

This utility model discloses a screw tightening and crushing tool for automobile half-shafts based on half-shaft anti-loosening technology, relating to the field of thread anti-loosening technology. It includes a main frame; a tightening mechanism comprising a first base, a limiting member, a tightening member, and a moving member located on one side of the main frame, with the tightening member embedded within the limiting member; a vision camera assembly located in the middle of the main frame, used to photograph and locate the brake disc boss and the notch of the half-shaft; a crushing mechanism comprising a second base, a crushing cylinder, an impact block, a guide rail, a crushing mounting block, a chisel, and a crushing cutter located on the other side of the main frame, with the impact block slidably mounted on the guide rail to impact the chisel, and a first spring between the chisel and the crushing cutter; and a control device, with the tightening member, the moving member, the crushing cylinder, and the vision camera assembly all connected to the control device. This device can improve the thread anti-loosening effect, achieve automated thread anti-loosening operation, and reduce the labor intensity of thread anti-loosening operations.

Description

Technical Field

[0001] This utility model relates to the field of thread anti-loosening technology, and more specifically, to a tightening and crushing tool for automotive half-shaft screws based on half-shaft anti-loosening technology. Background Technology

[0002] In existing technologies, thread loosening has long been a serious problem, even a fatal hazard, in industrial manufacturing and products. During the tightening process, the engineering plastic is compressed, generating a strong reaction force that greatly increases the friction between the internal and external threads, providing absolute resistance to vibration. This resistance is distributed throughout the entire meshing section of the internal and external threads. This friction is independent of the tightening pressure; once the screw is tightened, the friction is immediately generated and permanently present, preventing loosening even if the screw is not fully tightened. This differs from previous anti-loosening methods, which rely on the friction generated by the pressure after tightening. If the screw loosens slightly, the pressure decreases, the friction quickly disappears, and the anti-loosening effect is lost, leading to screw loosening. Currently common anti-loosening processes mainly include using spring washers and anti-loosening washers, but their anti-loosening effect is generally limited. Furthermore, these processes require manual tightening, which is labor-intensive, time-consuming, and time-consuming.

[0003] In summary, how to improve the thread anti-loosening effect, reduce the labor intensity of thread anti-loosening operations, and improve the efficiency of thread anti-loosening operations are problems that urgently need to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a screw tightening and crushing tool for automobile half-shafts based on half-shaft anti-loosening technology, which can effectively improve the anti-loosening effect of threads and realize the automated operation of thread anti-loosening, thereby reducing the labor intensity of thread anti-loosening operation and improving the efficiency of thread anti-loosening operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A tool for tightening and crushing automotive half-shaft bolts based on half-shaft anti-loosening technology, comprising:

[0007] The main frame, which is used to connect with the robot;

[0008] The tightening mechanism includes a first base located on one side of the main frame, a limiting member for engaging the brake disc boss, a tightening member for tightening the nut of the half shaft, and a moving member. The tightening member is embedded in the limiting member, the limiting member is located at the moving end of the moving member, and the fixed end of the moving member is located on the first base.

[0009] A vision camera assembly is located in the middle of the main frame. The vision camera assembly is used to take pictures and locate the brake disc boss and the notch of the half shaft.

[0010] The crushing mechanism includes a second base on the other side of the main frame, a crushing cylinder on the second base, an impact block on the telescopic end of the crushing cylinder, a guide rail on the second base, a crushing mounting block for positioning the brake disc boss, a chisel movably disposed in the crushing mounting block, and a crushing cutter at one end of the chisel. The impact block is slidably disposed on the guide rail to impact the chisel. A first spring is provided between the chisel and the crushing cutter to push the crushing cutter to press the lip of the nut to the notch after the chisel is impacted.

[0011] The control device is connected to the tightening component, the moving component, the crushing cylinder, and the vision camera assembly.

[0012] In one embodiment, the telescopic end of the crushing cylinder is provided with a floating joint, the floating joint is connected to the impact block through a pad, a slider is slidably provided on the guide rail, and the impact block is disposed on the slider.

[0013] In one embodiment, the vision camera assembly includes a camera, a fixed bracket disposed in the middle of the main frame, and a protective cover, wherein the camera is disposed on the fixed bracket and the protective cover covers the camera.

[0014] In one embodiment, the chisel head is slidably disposed within the crushing mounting block. A connecting plate is provided at one end of the chisel head near the impact block. A guide shaft is vertically provided on the connecting plate. A first spring is sleeved on the outer periphery of the guide shaft. One end of the first spring contacts the connecting plate, and the other end of the first spring contacts the crushing tool, so that the crushing tool is movably disposed within the chisel head.

[0015] In one embodiment, the end of the chisel away from the impact block is provided with a first inclined surface, and the crushing tool includes two handles and a cutting head symmetrically distributed around the guide shaft. The cutting head is provided on the inner side of the handle, and a second inclined surface that cooperates with the first inclined surface is provided on the outer side of the handle. A second spring is provided between the two handles, and the elastic direction of the second spring is perpendicular to the elastic direction of the first spring.

[0016] In one embodiment, the ratio of the travel distance of the chisel head to the travel distance of the handle is in the range of 8-12.

[0017] In one embodiment, the crushing mounting block is fixed to the second base by a set screw, and multiple rollers and needle roller bearings sleeved on the outer periphery of the rollers are provided on opposite sides of the inner wall of the crushing mounting block. The outer wall of the chisel head and the needle roller bearings are in rolling contact.

[0018] In one embodiment, the first base has support plates vertically arranged on both sides, and one end of each support plate has a tightening mounting block. One end of the tightening mounting block has a limiting mounting block, and one end of the limiting mounting block has a limiting member. The tightening member passes through the tightening mounting block, the limiting mounting block, and the limiting member in sequence and is then connected to the nut.

[0019] In one embodiment, the limiting member includes a nylon limiting block, the outer peripheral wall of which is configured to cooperate with the inner peripheral wall of the brake disc boss.

[0020] In one embodiment, the tightening component includes a tightening gun, which passes sequentially through the tightening mounting block, the limiting mounting block, and the limiting component to connect with a sleeve, the sleeve being used to tighten the nut.

[0021] When using the automotive half-shaft bolt tightening and crushing tool based on the half-shaft anti-loosening technology provided in this utility model, the robot drives the device to the first imaging position. The vision camera component captures images of the tire mounting bolts and brake disc bosses as positioning features. The robot adjusts its posture and controls the movement of the moving parts to align the limiting member of the tightening mechanism with the brake disc boss, thereby restricting the rotation of the brake disc boss and fixing the brake disc. At the same time, the tightening member connects to the half-shaft nut to tighten the half-shaft nut. Then, the robot drives the device out of the tightening position to the second imaging position, where the vision camera component captures images of the positioning notch on the half-shaft. Subsequently, the robot adjusts its posture to align the crushing mounting block of the crushing mechanism with the brake disc boss, allowing the crushing mounting block to position the brake disc boss.

[0022] Next, the crushing cylinder is controlled to operate. The extension end of the crushing cylinder drives the impact block to extend. A quick exhaust valve is connected to the air line of the crushing cylinder, which effectively increases the impact speed of the crushing cylinder. This quickly drives the impact block to slide rapidly along the slide rail to the impact chisel head. After the chisel head is impacted, it pushes the crushing tool to press the lip of the nut to the notch, effectively preventing the nut from loosening during use. Moreover, the crushing tool can be made of high-hardness alloy material and processed with special heat treatment to ensure the crushing effect of the crushing tool. Afterward, it is checked whether the stroke of the crushing cylinder is complete to determine whether the crushing effect is NG (Not Good). If NG, the above crushing action is repeated. If the crushing action is NG after 3 times, an alarm can be triggered to request manual intervention. Finally, the robot leads the device to withdraw and return to the original position.

[0023] In summary, the automotive half-shaft screw tightening and crushing tool based on half-shaft anti-loosening technology provided by this utility model can effectively improve the thread anti-loosening effect and realize the automated operation of thread anti-loosening, thereby reducing the labor intensity of thread anti-loosening operation and improving the efficiency of thread anti-loosening operation. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the automotive half-shaft screw tightening and crushing tool based on the half-shaft anti-loosening technology provided by this utility model.

[0026] Figure 2 This is a top view of the crushing mechanism;

[0027] Figure 3 This is a schematic diagram of the crushing tool.

[0028] Figure 4 This is a side view of the crushing mechanism;

[0029] Figure 5 This is the front view of the tightening mechanism;

[0030] Figure 6 for Figure 5 AA cross-section view.

[0031] Figures 1-6 middle:

[0032] 1 is a needle roller bearing, 2 is a second spring, 3 is a first spring, 4 is a crushing cylinder, 5 is a floating joint, 6 is a guide rail, 7 is a set screw, 8 is a tightening gun, 9 is a camera, 10 is a slider, 11 is a reflective sticker, 12 is a fixed bracket, 13 is a second base, 14 is a robot flange, 15 is a protective cover, 16 is a nylon limit block, 17 is a tightening mounting block, 18 is a support plate, 19 is a limit mounting block, 20 is a limit pin, 21 is a crushing mounting block, 22 is a chisel, 23 is a first base, 24 is a connecting plate, 25 is an impact block, 26 is a triangular support plate, 27 is a guide shaft, 28 is a tool holder, 29 is a roller, 30 is a cylinder connecting plate, 31 is a sleeve, 32 is a pad, 33 is a cutter head, 34 is a main frame, 35 is a tightening mechanism, 36 is a vision camera assembly, and 37 is a crushing mechanism. Detailed Implementation

[0033] 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.

[0034] The core of this utility model is to provide a tightening and crushing tool for automotive half-shaft screws based on half-shaft anti-loosening technology, which can effectively improve the anti-loosening effect of threads and realize the automated operation of thread anti-loosening, thereby reducing the labor intensity of thread anti-loosening operation and improving the efficiency of thread anti-loosening operation.

[0035] Please refer to Figure 1 This specific embodiment provides a tightening and crushing tool for automotive half-shaft bolts based on half-shaft anti-loosening technology, including:

[0036] Main frame 34, which is used to connect with the robot;

[0037] The tightening mechanism 35 includes a first base 23 located on one side of the main frame 34, a limiting member for engaging the brake disc boss, a tightening member for tightening the nut of the half shaft, and a moving member. The tightening member is embedded in the limiting member, the limiting member is located at the moving end of the moving member, and the fixed end of the moving member is located on the first base 23.

[0038] The vision camera assembly 36 is located in the middle of the main frame 34. The vision camera assembly 36 is used to take pictures of the positioning brake disc boss and the notch of the half shaft.

[0039] The crushing mechanism 37 includes a second base 13 located on the other side of the main frame 34, a crushing cylinder 4 located on the second base 13, an impact block 25 located at the telescopic end of the crushing cylinder 4, a guide rail 6 located on the second base 13, a crushing mounting block 21 for positioning the brake disc boss, a chisel 22 movably located in the crushing mounting block 21, and a crushing cutter located at one end of the chisel 22. The impact block 25 is slidably located on the guide rail 6 to impact the chisel 22. A first spring 3 is provided between the chisel 22 and the crushing cutter to push the crushing cutter to press the lip of the nut to the notch after the chisel 22 is impacted.

[0040] The control device, tightening component, moving component, crushing cylinder, and vision camera assembly 36 are all connected to the control device.

[0041] It's important to note that a car's tires, brake discs, and half-shafts work together through a sophisticated mechanical structure to transmit power and perform braking. The tire mounting bolts, the brake disc boss (located at the center of the brake disc), and the half-shaft are the key connecting points. Through nesting, fastening, and transmission, these three components work together to form the basis for wheel rotation and braking. The half-shaft, acting as the drive shaft, is rigidly connected to the brake disc boss at its end via a spline or bolt structure, directly transmitting torque to rotate the wheel. The positioning holes or spline grooves of the brake disc boss must precisely mate with the half-shaft to ensure accurate power transmission. The brake disc is fixed to the wheel hub via mounting holes on the center boss, and the wheel hub is fitted onto the half-shaft journal via bearings, forming a power transmission path of "half-shaft → brake disc → wheel hub." The tire is bolted to the wheel hub flange, and the wheel hub rotates synchronously with the brake disc, ultimately transmitting power from the half-shaft to the tire via the brake disc and wheel hub.

[0042] It should also be noted that the main frame 34 is welded from multiple square steel pipes, and a robot flange 14 can be set in the middle of the main frame 34 to connect the robot to the main frame 34, enabling spatial movement of the device. The main frame 34 is mainly responsible for connecting the robot and is used to install the crushing mechanism 37, the tightening mechanism 35, and the vision camera assembly 36.

[0043] In practical applications, the shape, structure, type, and position of the main frame 34, tightening mechanism 35, vision camera assembly 36, crushing mechanism 37, and control device can be determined according to the actual situation and needs.

[0044] In one embodiment, such as Figure 2 and Figure 3 As shown, the telescopic end of the crushing cylinder 4 is provided with a floating joint 5. The floating joint 5 is connected to the impact block 25 through the pad 32. A slider 10 is slidably provided on the guide rail 6, and the impact block 25 is provided on the slider 10.

[0045] It should be noted that the telescopic end of the crushing cylinder 4 passes through the cylinder connecting plate 30 and the floating joint 5. The cylinder connecting plate 30 and the second base 13 are vertically distributed, and triangular support plates 26 are provided on both sides of the second base 13 to strengthen the structural stability of the crushing cylinder 4. Furthermore, a reflective sticker 11 can be provided on the side of the cylinder connecting plate 30 closest to the crushing cylinder 4. When the crushing cylinder 4 is running, the telescopic end of the crushing cylinder 4 drives the floating joint 5 to extend and retract. The floating joint 5 drives the impact block 25 to extend and retract synchronously, so that the impact block 25 drives the slider 10 to slide on the guide rail 6, thereby impacting the chisel head 22. After being impacted, the chisel head 22 pushes the crushing tool to press the lip of the nut to the notch.

[0046] In one embodiment, the vision camera assembly 36 includes a camera 9, a fixed bracket 12 disposed in the middle of the main frame 34, and a protective cover 15. The camera 9 is mounted on the fixed bracket 12, and the protective cover 15 covers the camera 9. Therefore, the brake disc boss and the notch of the half shaft can be located by taking pictures with the camera 9.

[0047] In one embodiment, the chisel head 22 is slidably disposed within the crushing mounting block 21. A connecting plate 24 is provided at one end of the chisel head 22 near the impact block 25. A guide shaft 27 is vertically disposed on the connecting plate 24. A first spring 3 is sleeved on the outer periphery of the guide shaft 27. One end of the first spring 3 contacts the connecting plate 24, and the other end contacts the crushing tool, allowing the crushing tool to be movably disposed within the chisel head 22. When the chisel head 22 is subjected to an impact force, the connecting plate 24 and the chisel head 22 move to the left, compressing the first spring 3. The crushing tool, under the force of the first spring 3, moves to the left and extends, thus facilitating the crushing tool to press against the lip of the nut.

[0048] In one embodiment, the chisel head 22 has a first inclined surface at the end away from the impact block 25. The crushing tool includes two shanks 28 and a blade head 33 symmetrically distributed around the guide shaft 27. The blade head 33 is provided on the inner side of the shank 28, and a second inclined surface that cooperates with the first inclined surface is provided on the outer side of the shank 28. A second spring 2 is provided between the two shanks 28. The elastic direction of the second spring 2 is perpendicular to the elastic direction of the first spring 3.

[0049] It should be noted that during operation, the impact block 25 strikes the assembly of the chisel head 22 and the connecting plate 24 along the guide rail 6 (the end of the chisel head 22 has a first inclined surface, which is smoothly machined). A first spring 3 is provided between the connecting plate 24 and the crushing mounting block 21. The center of the first spring 3 passes through the guide shaft 27. The first spring 3 is a return spring. A second inclined surface is provided on the outer side of the handle 28, meaning that the second inclined surface is provided on the side of the handle 28 closest to the chisel head 22. The second inclined surface is smoothly machined. A cutter head 33 is provided on the inner side of the handle 28, meaning that the cutter head 33 is provided on the side of the handle 28 furthest from the chisel head 22. That is, the cutter head 33 is clamped in the handle 28 and fixed to the handle 28 by bolts to form a crushing tool. The crushing tool is installed in the slot of the crushing mounting block 21, retaining only the X-axis degree of freedom of the crushing tool and restricting the other degrees of freedom of the crushing tool. A second spring 2 is vertically provided between the two sets of handles 28 to ensure that the second spring 2 can automatically return to its original position after crushing.

[0050] In one embodiment, the ratio of the travel distance of the chisel 22 to the travel distance of the handle 28 is in the range of 8-12. For example, the ratio of the travel distance of the chisel 22 to the travel distance of the handle 28 can be set to 10:1, so that the impact force of the chisel 22 is amplified tenfold, and the crushing tool effectively crushes the lip of the nut onto the notch of the half shaft.

[0051] In one embodiment, the crushing mounting block 21 is fixed to the second base 13 by a set screw 7. Multiple rollers 29 and needle roller bearings 1 sleeved on the outer periphery of the rollers 29 are provided on opposite sides of the inner wall of the crushing mounting block 21. The outer wall of the chisel head 22 and the needle roller bearings 1 are in rolling contact. Therefore, the chisel head 22 can move relative to the crushing mounting block 21 after being subjected to an impact force, and the rolling contact between the outer wall of the chisel head 22 and the needle roller bearings 1 prevents them from hindering the movement of the chisel head 22. Furthermore, a limiting pin 20 can be provided on the crushing mounting block 21 to limit the range of movement of the chisel head 22.

[0052] In one embodiment, such as Figure 5 As shown, support plates 18 are vertically arranged on both sides of the first base 23. One end of each support plate 18 is provided with a tightening mounting block 17. One end of the tightening mounting block 17 is provided with a limiting mounting block 19. One end of the limiting mounting block 19 is provided with a limiting element. The tightening element passes through the tightening mounting block 17, the limiting mounting block 19 and the limiting element in sequence and then connects to the nut.

[0053] In one embodiment, the limiting member includes a nylon limiting block 16, the outer peripheral wall of which is configured to cooperate with the inner peripheral wall of the brake disc boss to ensure that the nylon limiting block 16 effectively fixes the brake disc boss, thereby allowing only the nut of the half shaft to be tightened.

[0054] In one embodiment, the tightening component includes a tightening gun 8, which passes sequentially through a tightening mounting block 17, a limiting mounting block 19, and a limiting member to connect with a sleeve 31, which is used to tighten the nut. Therefore, when the tightening gun 8 is in operation, it can drive the sleeve 31 to tighten the nut.

[0055] To further illustrate the use of the automotive half-shaft screw tightening and crushing tool based on the half-shaft anti-loosening technology provided by this utility model, the following example will be given.

[0056] The robot moves the device to the first imaging position. The vision camera assembly 36 captures images of the tire mounting bolts and brake disc bosses as positioning features. The robot adjusts its posture and controls the movement of the moving parts to align the limiting member of the tightening mechanism 35 with the brake disc boss, thereby limiting the rotation of the brake disc boss and fixing the brake disc. Then, the tightening gun 8 performs a nut recognition procedure, and after the nut recognition is completed, it performs a tightening operation to tighten the nut of the half-shaft. Then, the robot moves the device out of the tightening position to the second imaging position, where the vision camera assembly 36 captures images of the notch on the positioning half-shaft. Subsequently, the robot adjusts its posture to align the crushing mounting block 21 of the crushing mechanism 37 with the brake disc boss, and the crushing mounting block 21 can position the brake disc boss.

[0057] Next, the crushing cylinder 4 is operated. The extension end of the crushing cylinder 4 drives the impact block 25 to extend. A quick exhaust valve is connected to the air circuit of the crushing cylinder 4, and the impact speed of the crushing cylinder 4 reaches 1m / s, driving the 10kg impact block 25 to impact the chisel head 22. Moreover, the stroke ratio of the chisel head to the handle is 10:1, so that the impact force of the impact block 25 is amplified tenfold. This allows the chisel head 22 to forcefully push the crushing tool to press the lip of the nut to the notch after impact, effectively preventing the nut from loosening during use. Afterward, it is checked whether the stroke of the crushing cylinder 4 is complete to determine whether the crushing effect is not good. If it is not good, the above crushing action is repeated. If the crushing action is not good after 3 times, an alarm can be triggered to request manual intervention. Finally, the robot drives the device to withdraw and return to the original position.

[0058] It should be noted that the first base 23 and the second base 13, the first spring 3 and the second spring 2, the first photo position and the second photo position mentioned in this application are only distinguished by their different positions and do not have any order of precedence.

[0059] In addition, it should be noted that the orientation or positional relationship indicated by "inner and outer", "left", "vertical" etc. in this application is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the purpose of simplifying the description and making it easier to understand. It does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Any combination of all embodiments provided by this utility model is within the protection scope of this utility model and will not be elaborated upon here.

[0061] The above provides a detailed description of the automotive half-shaft screw tightening and crushing tool based on the half-shaft anti-loosening technology provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A tool for tightening and crushing automotive half-shaft bolts based on half-shaft anti-loosening technology, characterized in that, include: The main frame (34) is used to connect with the robot; The tightening mechanism (35) includes a first base (23) located on one side of the main frame (34), a limiting member for engaging the brake disc boss, a tightening member for tightening the nut of the half shaft, and a moving member. The tightening member is embedded in the limiting member, the limiting member is located at the moving end of the moving member, and the fixed end of the moving member is located on the first base (23). A vision camera assembly (36) is located in the middle of the main frame (34). The vision camera assembly (36) is used to take pictures of the brake disc boss and the notch of the half shaft. The crushing mechanism (37) includes a second base (13) on the other side of the main frame (34), a crushing cylinder (4) on the second base (13), an impact block (25) on the telescopic end of the crushing cylinder (4), a guide rail (6) on the second base (13), a crushing mounting block (21) for positioning the brake disc boss, a chisel (22) movably disposed in the crushing mounting block (21), and a crushing cutter at one end of the chisel (22). The impact block (25) is slidably disposed on the guide rail (6) to impact the chisel (22). A first spring (3) is provided between the chisel (22) and the crushing cutter to push the crushing cutter to press the lip of the nut to the notch after the chisel (22) is impacted. The control device is connected to the tightening component, the moving component, the crushing cylinder, and the vision camera assembly (36).

2. The automotive half-shaft bolt tightening and crushing tool based on the half-shaft anti-loosening technology according to claim 1, characterized in that, The telescopic end of the crushing cylinder (4) is provided with a floating joint (5), which is connected to the impact block (25) through a pad (32). A slider (10) is slidably provided on the guide rail (6), and the impact block (25) is located on the slider (10).

3. The automotive half-shaft bolt tightening and crushing tool based on the half-shaft anti-loosening technology according to claim 1, characterized in that, The visual camera assembly (36) includes a camera (9), a fixed bracket (12) located in the middle of the main frame (34), and a protective cover (15). The camera (9) is mounted on the fixed bracket (12), and the protective cover (15) covers the camera (9).

4. The automotive half-shaft bolt tightening and crushing tool based on the half-shaft anti-loosening technology according to any one of claims 1 to 3, characterized in that, The chisel (22) is slidably disposed within the crushing mounting block (21). A connecting plate (24) is provided at one end of the chisel (22) near the impact block (25). A guide shaft (27) is vertically disposed on the connecting plate (24). The first spring (3) is sleeved on the outer periphery of the guide shaft (27). One end of the first spring (3) is in contact with the connecting plate (24), and the other end of the first spring (3) is in contact with the crushing tool, so that the crushing tool is movably disposed within the chisel (22).

5. The automotive half-shaft bolt tightening and crushing tool based on half-shaft anti-loosening technology according to claim 4, characterized in that, The chisel head (22) has a first inclined surface at one end away from the impact block (25). The crushing tool includes two shanks (28) and a blade head (33) symmetrically distributed around the guide shaft (27). The blade head (33) is provided on the inner side of the shank (28), and a second inclined surface that cooperates with the first inclined surface is provided on the outer side of the shank (28). A second spring (2) is provided between the two shanks (28), and the elastic direction of the second spring (2) is perpendicular to the elastic direction of the first spring (3).

6. The automotive half-shaft bolt tightening and crushing tool based on the half-shaft anti-loosening technology according to claim 5, characterized in that, The ratio of the travel distance of the chisel head (22) to the travel distance of the handle (28) is 8-12.

7. The automotive half-shaft bolt tightening and crushing tool based on the half-shaft anti-loosening technology according to any one of claims 1 to 3, characterized in that, The crushing mounting block (21) is fixed to the second base (13) by a set screw (7). Multiple rollers (29) and needle roller bearings (1) sleeved on the outer periphery of the rollers (29) are provided on both sides of the inner wall of the crushing mounting block (21). The outer wall of the chisel (22) and the needle roller bearings (1) are in rolling contact.

8. The automotive half-shaft bolt tightening and crushing tool based on the half-shaft anti-loosening technology according to any one of claims 1 to 3, characterized in that, The first base (23) has support plates (18) vertically arranged on both sides. One end of each support plate (18) is provided with a tightening mounting block (17). One end of the tightening mounting block (17) is provided with a limiting mounting block (19). One end of the limiting mounting block (19) is provided with a limiting member. The tightening member passes through the tightening mounting block (17), the limiting mounting block (19), and the limiting member in sequence and is then connected to the nut.

9. The automotive half-shaft bolt tightening and crushing tool based on half-shaft anti-loosening technology according to claim 8, characterized in that, The limiting component includes a nylon limiting block (16), the outer peripheral wall of the nylon limiting block (16) and the inner peripheral wall of the brake disc boss are configured to cooperate.

10. The automotive half-shaft bolt tightening and crushing tool based on the half-shaft anti-loosening technology according to claim 8, characterized in that, The tightening component includes a tightening gun (8), which passes through the tightening mounting block (17), the limiting mounting block (19), and the limiting component and is connected to the sleeve (31) in sequence. The sleeve (31) is used to tighten the nut.

Images