Steering bridge body polishing clamp

Abstract

The application relates to the technical field of steering axle body processing, and discloses a steering axle body polishing clamp which comprises a bottom plate, two supports are fixed on the bottom plate and used for placing steering axle bodies, a cylinder seat is fixed on the bottom plate beside the supports and used for clamping and limiting the steering axle bodies, the steering axle body is placed on the supports under the action of a gravity clamping mechanism one, the positioning screw can drive the shaft on the steering axle body to be clamped, the shaft is clamped under the action of a gravity clamping mechanism two, and the clamping operation on the middle part of the steering axle body can be directly completed, the steering axle body can be aligned with the V-shaped block one and placed under the action of a guiding unit, the V-shaped block one and the positioning screw can be fixed by driving the locking unit, the gravity clamping mechanism one and the gravity clamping mechanism two are locked, and the stability during polishing is ensured.

Description

Technical Field

[0001] This invention relates to the field of steering axle body processing technology, and in particular to a steering axle body grinding fixture. Background Technology

[0002] The steering axle is a key component of the steering axle that bears and transmits various forces and torques. It typically works in conjunction with components such as the steering knuckle and front axle to achieve the vehicle's steering function.

[0003] When grinding the burrs on the steering axle, a clamp is needed to hold the axle in place. Low-cost clamps are manually adjusted by workers, while high-cost clamps use fully automated configurations for holding the axle.

[0004] However, existing technologies have the following drawbacks:

[0005] Low-cost fixtures are time-consuming and labor-intensive, resulting in low work efficiency. High-cost fixtures, on the other hand, are not widely used due to their excessive cost. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides a steering axle grinding fixture.

[0007] The present invention is achieved by the following technical solution: a steering axle grinding fixture includes: a base plate, two supports fixed on the base plate for placing the steering axle, and a cylindrical seat fixed on the base plate next to the supports for clamping and limiting the steering axle;

[0008] Gravity clamping mechanism 1, the gravity clamping mechanism includes spring 1, V-block 1 and gravity clamping unit 1, one end of spring 1 is welded to the inner cavity of the support, and the other end of spring 1 is welded to one end of V-block 1, the other end of V-block 1 can place the steering axle body.

[0009] The second gravity clamping mechanism includes a base, four springs, two V-blocks, and a second gravity clamping unit. The base is fixed on the base plate and located between two supports. One end of each of the four springs is welded inside the base, and the other end of each spring is welded to one end of the two V-blocks. The other end of the two V-blocks can be used to place the steering axle.

[0010] The above technical solution, with eye bolts on the base plate, allows for easy rope attachment and overhead crane transport.

[0011] By providing protective plates at both ends of the base plate, the grinding fixture is protected from collisions with cutting tools or machine tools due to special reasons.

[0012] A locating pin is installed under the base plate to position the base plate relative to the machine tool table.

[0013] By using gravity clamping mechanism, gravitational potential energy can be used as driving force to quickly clamp the steering axle, avoiding the time required for manual clamping.

[0014] The middle part of the steering axle can be supported and clamped by the second gravity clamping mechanism, which further ensures the stability of the clamp.

[0015] As a further improvement to the above solution, the gravity clamping unit includes a pressing unit and a locking unit. The pressing unit includes a connecting rod, a slot one, a slot two, and an engagement drive unit. The slot one is opened at one end of the support near the cylinder seat, and the slot two is opened at one end of the cylinder seat near the support. One end of the connecting rod is fixed to the support, and the other end of the connecting rod passes through the slot one and the slot two and is located in the inner cavity of the cylinder seat.

[0016] Through the above technical solution, when the V-block moves into the support, it pulls the connecting rod to move together within the cylinder seat. This increases the driving force for the engagement drive unit, allowing the positioning screw to complete the clamping operation of the steering axle.

[0017] As a further improvement to the above solution, the meshing drive unit includes a rack, a gear, a first rotating rod, a first gear chain, a second rotating rod, a second gear chain, a rotating plate, and a positioning screw. One end of the rack is fixed to the other end of the connecting rod. Both ends of the first rotating rod are fixed in the cylinder seat by bearings. The gear is fixed on the first rotating rod and forms a meshing connection structure with the rack. The cylinder seat also has a third rotating rod fixed in the cylinder seat by bearings. The inner ring of the first gear chain drives the first rotating rod and the third rotating rod. The inner ring of the second gear chain drives the second rotating rod and the third rotating rod. Both ends of the second rotating rod are fixed in the cylinder seat by bearings. One end of the rotating plate is fixed on the second rotating rod, and the positioning screw is set on the rotating plate and can contact the steering axle body.

[0018] The above technical solution uses a connecting rod to drive the rack to move up and down, which in turn drives the gear to rotate. Then, through the linkage of the gear chain 1 and gear chain 2 of the first, third, and second rotating rods, the rotating plate rotates as the gear rotates, causing the positioning screw to rotate and contact the steering axle body. Simultaneously, the positioning screw is threadedly connected to the rotating plate. The length of the positioning screw below the rotating plate can be adjusted by rotating the positioning screw, thus adapting to steering axle shafts of different diameters.

[0019] As a further improvement to the above solution, the locking unit includes a movable cavity, a second spring, a steel ball, a moving groove, a positioning rod, a positioning groove, a sliding unit, and a pulling unit. The movable cavity is opened on the first V-block. One end of the second spring is welded into the movable cavity, and the other end of the second spring is welded to one end of the steel ball. Both moving grooves are opened in the movable cavity. The positioning rod is located in the moving groove through the sliding unit. Both positioning rods are opened in the support, and the positioning rod can be inserted into the positioning groove.

[0020] Through the above technical solution, when the steel ball is no longer pulled by the steel wire under the rebound of spring two, it can automatically return to the movable cavity and not contact the positioning rod. Furthermore, by using the steel ball to press the two positioning rods into the positioning groove, the position of V-block one on the support can be limited, thereby ensuring the stability of the positioning screw clamping the steering axle body.

[0021] As a further improvement to the above solution, the sliding unit includes a slide rail, a slider, and a spring. Both slide rails are opened in the moving groove, both sliders are fixed on the positioning rod, and the sliders slide in the slide rail. One end of the spring is welded to the slider, and the other end of the spring is welded to the slide rail.

[0022] The above technical solution ensures the horizontality and smoothness of the positioning rod's movement by moving the positioning rod within the sliding groove and driving the slider to slide within the slide rail. Simultaneously, the elastic potential energy of spring three ensures that when the steel ball does not press down on the positioning rod, it can rebound from the positioning groove and move outwards along with the V-block.

[0023] As a further improvement to the above solution, the pulling unit includes a steel wire, a steel wire groove, a pressing groove, and a guiding unit. One end of the steel wire is fixed to the other end of the steel ball. The steel wire groove is opened in the support, and the pressing groove is opened on the base plate. The steel wire groove and the pressing groove are connected to form a channel for the steel wire to move. The other end of the steel wire passes through the channel and is fixed in the pressing groove.

[0024] The above technical solution involves installing a pulley within the wire groove, with the wire moving in conjunction with the pulley. This ensures smooth movement of the wire within the channel, and one end of the wire is fixed in the pressing groove. When the long rod presses into the pressing groove, it bends the wire, pulling the steel ball into contact with the positioning rod, thus locking the V-block and positioning screw onto the steering axle. This ensures the stability of the steering axle position when grinding burrs on it.

[0025] As a further improvement to the above solution, the guiding unit includes an electric push rod, a guide plate, and a long rod. The electric push rod is fixed to the base plate, and the other end of the electric push rod is fixed to the guide plate. One end of the long rod is fixed to the guide plate, and the other end of the long rod can be inserted into the pressing groove.

[0026] The above technical solution, by setting the guide plate as an open, sloping panel, allows the steering axle to gradually move deeper into the guide plate when it is lifted and placed by a crane, thus limiting the steering axle's position. This allows the steering axle to be placed directly on the V-block without special alignment, saving time.

[0027] Furthermore, an electric push rod is used to move the guide plate up and down, which can be used to lift the steering axle after grinding, and also facilitates the unloading operation.

[0028] As a further improvement to the above solution, the gravity clamping unit 2 includes a groove 3, a clamping block, a spring 5, a pressing unit and a limiting unit. The groove 3 is opened in the base. One end of the spring 5 is welded in the groove 3, and the other end of the spring 5 is welded to one end of the clamping block. The other end of the clamping block can contact the steering axle body.

[0029] The above technical solution utilizes the elastic force of spring five to clamp the center of the steering axle using clamping blocks. This, combined with the limiting operation of the gravity clamping mechanisms at both ends of the steering axle, enhances overall stability.

[0030] As a further improvement to the above solution, the pressing unit includes a hinge rod and a mounting plate. One end of the hinge rod is hinged to the clamping block, and the mounting plate is fixed on the V-shaped block two and located in the groove three. A sliding groove is provided at the end of the hinge rod near the mounting plate so that the mounting plate can slide.

[0031] The above technical solution uses V-block two to move the mounting plate up and down, and the mounting plate slides in the groove. The clamping block can be pressed into or released into groove three, thereby using the clamping block to clamp the steering axle.

[0032] As a further improvement to the above solution, the limiting unit includes a slide rail and a moving block. One end of the moving block is hinged to the other end of the hinge rod. The slide rail is opened in the groove three, and the other end of the moving block slides in the slide rail.

[0033] With the above technical solution, when the moving block is pulled by the hinge rod and moved by the clamping block, the moving block can slide in the groove three, which can further ensure the stability of the movement of the clamping block.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] This invention places the steering axle on the support under the action of gravity clamping mechanism one, which then drives the positioning screw to clamp the shaft on the steering axle. Under the action of gravity clamping mechanism two, the clamping operation of the middle part of the steering axle can be completed simultaneously with the shaft clamping. Under the action of the guiding unit, the time required for aligning the steering axle with V-block one is avoided, and the locking unit is driven to fix the positions of V-block one and the positioning screw, thereby locking gravity clamping mechanism one and gravity clamping mechanism two, ensuring stability during grinding. Attached Figure Description

[0036] Figure 1This is a three-dimensional structural diagram (including the steering axle body) of a steering axle grinding fixture provided in Embodiment 1 of the present invention;

[0037] Figure 2 This is a three-dimensional structural diagram (excluding the steering axle body) of a steering axle grinding fixture;

[0038] Figure 3 This is a side view cross-sectional structural diagram of a steering axle grinding fixture;

[0039] Figure 4 This is a frontal cross-sectional view of a steering axle grinding fixture.

[0040] Figure 5 For a type of steering axle grinding fixture Figure 4 Enlarged structural diagram at point A;

[0041] Figure 6 For a type of steering axle grinding fixture Figure 5 Enlarged structural diagram at point B;

[0042] Figure 7 For a type of steering axle grinding fixture Figure 4 A magnified structural diagram at point C.

[0043] Explanation of key symbols:

[0044] 1. Base plate; 2. Support; 3. Spring 1; 4. V-block 1; 5. Connecting rod; 6. Groove 1; 7. Groove 2; 8. Cylinder seat; 9. Rack; 10. Gear; 11. Rotating rod 1; 12. Toothed chain 1; 13. Rotating rod 2; 14. Toothed chain 2; 15. Rotating plate; 16. Positioning screw; 17. Movable cavity; 18. Spring 2; 19. Steel ball; 20. Moving groove; 21. Slide rail; 22. 23. Slider; 24. Spring 3; 25. Positioning rod; 26. Positioning groove; 27. Steel wire; 28. Steel wire groove; 29. ​​Pressing groove; 20. Electric push rod; 31. Guide plate; 32. Long rod; 33. Base; 34. Spring 4; 35. V-block 2; 36. Groove 3; 37. Slide rail; 38. Moving block; 39. Hinge rod; 40. Clamping block; 41. Spring 5; 42. Mounting plate. Detailed Implementation

[0045] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0046] Example 1:

[0047] Please combine Figure 1-7A steering axle grinding fixture according to this embodiment includes: a base plate 1, two supports 2 fixed on the base plate 1 for placing the steering axle, and a cylindrical seat 8 fixed on the base plate 1 next to the supports 2 for clamping and limiting the steering axle.

[0048] Gravity clamping mechanism 1, which includes spring 3, V-block 4 and gravity clamping unit 1. One end of spring 3 is welded to the inner cavity of support 2, and the other end of spring 3 is welded to one end of V-block 4. The other end of V-block 4 can be used to place the steering axle.

[0049] The second gravity clamping mechanism includes a base 32, four springs 33, two V-blocks 34, and a second gravity clamping unit. The base 32 is fixed on the base plate 1 and located between two supports 2. One end of each of the four springs 33 is welded inside the base 32, and the other end of each spring 33 is welded to one end of the two V-blocks 34. The other end of the two V-blocks 34 can be used to place the steering axle.

[0050] The gravity clamping unit includes a pressing unit and a locking unit. The pressing unit includes a connecting rod 5, a slot 1 6, a slot 2 7 and an engagement drive unit. The slot 1 6 is opened at one end of the support 2 near the cylinder seat 8, and the slot 2 7 is opened at one end of the cylinder seat 8 near the support 2. One end of the connecting rod 5 is fixed on the support 2, and the other end of the connecting rod 5 passes through the slot 1 6 and the slot 2 7 and is located in the inner cavity of the cylinder seat 8.

[0051] The meshing drive unit includes a rack 9, a gear 10, a first rotating rod 11, a first gear chain 12, a second rotating rod 13, a second gear chain 14, a rotating plate 15, and a positioning screw 16. One end of the rack 9 is fixed to the other end of the connecting rod 5. Both ends of the first rotating rod 11 are fixed in the cylinder seat 8 by bearings. The gear 10 is fixed on the first rotating rod 11 and forms a meshing connection structure with the rack 9. The third rotating rod is also fixed in the cylinder seat 8 by bearings. The inner ring of the first gear chain 12 drives the first rotating rod 11 and the third rotating rod. The inner ring of the second gear chain 14 drives the second rotating rod 13 and the third rotating rod. Both ends of the second rotating rod 13 are fixed in the cylinder seat 8 by bearings. One end of the rotating plate 15 is fixed on the second rotating rod 13, and the positioning screw 16 is set on the rotating plate 15 and can contact the steering axle body.

[0052] The locking unit includes a movable cavity 17, a second spring 18, a steel ball 19, a moving groove 20, a positioning rod 24, a positioning groove 25, a sliding unit, and a pulling unit. The movable cavity 17 is opened on the V-block 4. One end of the second spring 18 is welded to the movable cavity 17, and the other end of the second spring 18 is welded to one end of the steel ball 19. Both moving grooves 20 are opened in the movable cavity 17. The positioning rod 24 is set in the moving groove 20 through the sliding unit. Both positioning rods 24 are opened in the support 2. The positioning rods 24 can be inserted into the positioning groove 25.

[0053] The sliding unit includes a slide rail 21, a slider 22, and a spring 23. Both slide rails 21 are opened in the moving groove 20. Both sliders 22 are fixed on the positioning rod 24 and slide within the slide rail 21. One end of the spring 23 is welded to the slider 22, and the other end of the spring 23 is welded to the slide rail 21.

[0054] The pulling unit includes a steel wire 26, a steel wire groove 27, a pressing groove 28, and a guide unit. One end of the steel wire 26 is fixed to the other end of the steel ball 19. The steel wire groove 27 is opened in the support 2, and the pressing groove 28 is opened on the base plate 1. The steel wire groove 27 and the pressing groove 28 are connected to form a channel 1 for the steel wire 26 to move. The other end of the steel wire 26 passes through the channel 1 and is fixed in the pressing groove 28.

[0055] The guiding unit includes an electric push rod 29, a guide plate 30, and a long rod 31. The electric push rod 29 is fixed on the base plate 1, and the other end of the electric push rod 29 is fixed to the guide plate 30. One end of the long rod 31 is fixed on the guide plate 30, and the other end of the long rod 31 can be inserted into the pressing groove 28.

[0056] The implementation principle of a steering axle grinding fixture in this application embodiment is as follows: First, the electric push rod 29 is activated, which drives the long rod 31 away from the pressing groove 28, while the guide plate 30 is positioned above the V-block 4. The steering axle is then lifted and placed vertically into the two guide plates 30 using a small crane. When the steering axle is aligned with the V-block 4, the steering axle will sway within the guide plates 30, gradually bringing the steering axle and the center of the V-block 4 into a straight line, thus achieving the guiding effect of the guide plate 30.

[0057] When the steering axle body contacts the V-block 4, the crane continuously lowers the steering axle body. The steering axle body presses the V-block 4 into the support 2, compressing the spring 3, causing the V-block 4 to retract into the inner cavity of the support 2, and the steel wire 26 is no longer taut in the steel wire groove 27. When the steering axle body presses the V-block 4 to its maximum displacement value, the positioning rod 24 and the positioning groove 25 are aligned. During this process, the electric push rod 29 is activated, driving the long rod 31 deeper into the pressing groove 28, causing the guide plate 30 to gradually move away from the steering axle body. At the same time, V-block 4 will drive connecting rod 5 to move in slot 6 and slot 7, causing rack 9 to move in the inner cavity of cylinder seat 8. Under the meshing connection of rack 9 and gear 10, gear 10 is driven to rotate in the direction of rack 9, causing rotating rod 11 to rotate in the same direction. Under the meshing of gear chain 12 and gear chain 14, rotating rod 13 is driven to rotate in the same direction, causing rotating plate 15 and positioning screw 16 to rotate in the direction of steering axle, so that positioning screw 16 contacts the shaft on steering axle.

[0058] When the long rod 31 enters the pressing groove 28, it first contacts the steel wire 26, pressing the steel wire 26 deeper into the pressing groove 28. When the long rod 31 moves to the middle of the pressing groove 28, the steel wire 26 is taut again. As the long rod 31 continuously presses the steel wire 26 deeper into the pressing groove 28, it pulls the steel ball 19 to move out of the movable cavity 17 and contact the two positioning rods 24, pressing one end of the two positioning rods 24 into the positioning groove 25. At the same time, the slider 22 slides on the slide rail 21, stretching the spring 3 23. When the long rod 31 moves to the bottom of the pressing groove 28, it can stop driving the electric push rod 29 and keep it stationary. At this time, the two positioning rods 24 are inserted into the positioning groove 25, locking the position of the V-block 4, thus ensuring the stability of both the positioning screw 16 and the steering axle.

[0059] Example 2:

[0060] Combination Figure 1-7 Based on Embodiment 1, this embodiment is further improved in that: the gravity clamping unit 2 includes a groove 35, a clamping block 39, a spring 40, a pressing unit and a limiting unit. The groove 35 is opened in the base 32. One end of the spring 40 is welded in the groove 35, and the other end of the spring 40 is welded to one end of the clamping block 39. The other end of the clamping block 39 can contact the steering axle.

[0061] The pressing unit includes a hinge rod 38 and a mounting plate 41. One end of the hinge rod 38 is hinged to the clamping block 39. The mounting plate 41 is fixed on the V-shaped block 34 and located in the groove 35. A sliding groove is provided at the end of the hinge rod 38 near the mounting plate 41 so that the mounting plate 41 can slide.

[0062] The limiting unit includes a slide rail 36 and a moving block 37. One end of the moving block 37 is hinged to the other end of the hinge rod 38. The slide rail 36 is opened in the groove 35, and the other end of the moving block 37 slides in the slide rail 36.

[0063] The implementation principle of a steering axle grinding fixture in this embodiment is as follows: When the steering axle and V-block 34 come into contact, V-block 34 is pressed into the base 32, causing spring 4 33 to compress. When V-block 34 moves into the base 32, it will also move the mounting plate 41, causing one end of the mounting plate 41 to slide deeper into the groove 35 on the hinge rod 38. Under the elastic potential energy of spring 5 40, the clamping block 39 is driven to gradually approach the steering axle. At the same time, the hinge rod 38 rotates, causing the moving block 37 to slide in the slide 36 towards the clamping block 39, thus completing the clamping operation of the two clamping blocks 39 on the steering axle.

[0064] After both gravity clamping mechanisms one and two have completed their clamping function, a grinder is used to grind the burrs on the steering axle. After grinding is completed, the electric push rod 29 is activated again to move the guide plate 30 and the long rod 31 upward. When the long rod 31 moves out of the pressing groove 28, the guide plate 30 contacts the steering axle, thereby lifting the steering axle, which can then be lifted using a crane.

[0065] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A grinding fixture for a steering axle body, characterized in that, include: A base plate, on which two supports are fixed for placing the steering axle body, and a cylindrical seat is fixed on the base plate next to the supports for clamping and limiting the steering axle body; Gravity clamping mechanism 1, the gravity clamping mechanism includes spring 1, V-block 1 and gravity clamping unit 1, one end of spring 1 is welded to the inner cavity of the support, and the other end of spring 1 is welded to one end of V-block 1, the other end of V-block 1 can place the steering axle body. Gravity clamping mechanism two includes a base, four springs, two V-blocks and a gravity clamping unit two. The base is fixed on the base plate and located between two supports. One end of each of the four springs is welded inside the base, and the other end of each spring is welded to one end of the V-block. The other end of the V-block can be used to place the steering axle. The gravity clamping unit includes a pressing unit and a locking unit. The pressing unit includes a connecting rod, a slot one, a slot two, and an engagement drive unit. The slot one is opened at one end of the support near the cylinder seat, and the slot two is opened at one end of the cylinder seat near the support. One end of the connecting rod is fixed to the support, and the other end of the connecting rod passes through the slot one and the slot two and is located in the inner cavity of the cylinder seat. The meshing drive unit includes a rack, a gear, a first rotating rod, a first gear chain, a second rotating rod, a second gear chain, a rotating plate, and a positioning screw. One end of the rack is fixed to the other end of the connecting rod. Both ends of the first rotating rod are fixed in the cylinder seat by bearings. The gear is fixed on the first rotating rod and forms a meshing connection structure with the rack. The cylinder seat also has a third rotating rod fixed in the cylinder seat by bearings. The inner ring of the first gear chain drives the first rotating rod and the third rotating rod. The inner ring of the second gear chain drives the second rotating rod and the third rotating rod. Both ends of the second rotating rod are fixed in the cylinder seat by bearings. One end of the rotating plate is fixed on the second rotating rod, and the positioning screw is set on the rotating plate and can contact the steering axle body. The locking unit includes a movable cavity, a second spring, a steel ball, a moving groove, a positioning rod, a positioning groove, a sliding unit, and a pulling unit. The movable cavity is formed on the V-shaped block. One end of the second spring is welded into the movable cavity, and the other end of the second spring is welded to one end of the steel ball. Both moving grooves are formed in the movable cavity. The positioning rod is located in the moving groove through the sliding unit. Both positioning rods are located in the support, and the positioning rod can be inserted into the positioning groove. The positioning groove is located in the inner cavity of the support. The pulling unit includes a steel wire, a steel wire groove, a pressing groove, and a guiding unit. One end of the steel wire is fixed to the other end of the steel ball. The steel wire groove is opened in the support, and the pressing groove is opened on the base plate. The steel wire groove and the pressing groove are connected to form a channel for the steel wire to move. The other end of the steel wire passes through the channel and is fixed in the pressing groove. The guiding unit includes an electric push rod, a guide plate, and a long rod. The electric push rod is fixed to the base plate, and the other end of the electric push rod is fixed to the guide plate. One end of the long rod is fixed to the guide plate, and the other end of the long rod can be inserted into the pressing groove. When the long rod is pressed into the pressing groove, it can bend the steel wire and pull the steel ball to contact the positioning rod.

2. The steering axle grinding fixture as described in claim 1, characterized in that, The sliding unit includes a slide rail, a slider, and a spring. Both slide rails are formed in the moving groove, and both sliders are fixed on the positioning rod. The sliders slide within the slide rails. One end of the spring is welded to the slider, and the other end of the spring is welded to the slide rail.

3. A steering axle grinding fixture as described in claim 1, characterized in that, The gravity clamping unit 2 includes a groove 3, a clamping block, a spring 5, a pressing unit and a limiting unit. The groove 3 is opened in the base. One end of the spring 5 is welded in the groove 3, and the other end of the spring 5 is welded to one end of the clamping block. The other end of the clamping block can contact the steering axle body.

4. A steering axle grinding fixture as described in claim 3, characterized in that, The pressing unit includes a hinge rod and a mounting plate. One end of the hinge rod is hinged to the clamping block. The mounting plate is fixed on the V-shaped block two and located in the groove three. A sliding groove is provided at the end of the hinge rod near the mounting plate so that the mounting plate can slide.

5. A steering axle grinding fixture as described in claim 4, characterized in that, The limiting unit includes a slide rail and a movable block. One end of the movable block is hinged to the other end of the hinge rod. The slide rail is opened in the third groove, and the other end of the movable block slides in the slide rail.

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