A knuckle bearing hole processing equipment and a processing technology

Abstract

This invention provides a steering knuckle bearing hole machining equipment and machining process, belonging to the field of steering knuckle machining technology. It includes a base, with an alignment ring fixedly connected to the center of the top of the base. A steering knuckle workpiece is mounted on the top of the alignment ring, and a bearing column is fixedly connected to the bottom of the steering knuckle workpiece. This invention, by setting up a correction component and a stabilizing component, works in conjunction to create a dynamic machining mode for the steering knuckle workpiece during machining: "automatic correction in the early stage and enhanced stabilization in the middle and later stages." In the initial stage of machining, the correction component automatically drives the positioning ring to dynamically correct the bearing column using the workpiece's own positional changes, allowing the workpiece to automatically return to a coaxial position. As the drilling depth increases, the stabilizing component further clamps and fixes the outer side of the steering knuckle workpiece, improving overall support strength, reducing the impact of later machining vibrations on the hole machining quality, and improving the coaxiality, roundness, and machining accuracy of the bearing hole.

Description

Technical Field

[0001] This invention relates to the field of steering knuckle machining technology, and in particular to a steering knuckle bearing hole machining equipment and machining process. Background Technology

[0002] The steering knuckle is a crucial load-bearing component in a car's suspension and steering system. It primarily connects the wheel hub, shock absorber components, and steering mechanism, bearing the steering forces and loads generated during vehicle operation. Typically, the steering knuckle has bearing holes for mounting bearings. The machining accuracy of these bearing holes directly affects the bearing assembly effect and the stability of the vehicle during operation. The coaxiality, roundness, and dimensional accuracy of the bearing holes have a significant impact on the overall performance of the steering knuckle. Therefore, during the machining process, specialized machining equipment is usually required to position and clamp the steering knuckle before machining the bearing holes.

[0003] In the prior art, Chinese patent document CN114454000A discloses a steering knuckle, a steering knuckle bearing hole machining equipment, and a steering knuckle machining process. This includes a central steering knuckle body, a control arm integrally formed on the side of the steering knuckle body, and a mounting lug. While this technology offers advantages such as more secure fixing and easier machining of the steering knuckle bearing hole, it shares similarities with traditional methods. Existing steering knuckle bearing hole machining equipment typically uses a fixed positioning seat and a rigid clamping structure for one-time positioning of the steering knuckle. After initial positioning, drilling is performed using a cutting tool. However, due to the irregular structure of the steering knuckle and manufacturing errors in the blank, it is easily affected by cutting forces and vibrations during machining, leading to slight workpiece displacement. Traditional fixed clamping structures struggle to dynamically correct for workpiece position changes after initial positioning. Furthermore, to improve stability, strong clamping forces are typically used for fixing before machining, which not only limits the workpiece's automatic alignment capability but also retains the initial deviation in subsequent machining processes, thus affecting the coaxial accuracy and machining quality of the bearing hole. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a steering knuckle bearing hole processing equipment and processing technology to solve the problems of existing steering knuckle bearing hole processing equipment, which have the problem that the workpiece offset cannot be automatically corrected during the processing and that the initial rigid clamping easily retains positioning errors, resulting in a decrease in the processing accuracy of the bearing hole.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A steering knuckle bearing hole machining device includes a base. An alignment ring is fixedly connected to the center of the top of the base. A steering knuckle workpiece is mounted on the top of the alignment ring, and a bearing column is fixedly connected to the bottom of the steering knuckle workpiece. The inner diameter of the alignment ring is larger than the outer diameter of the bearing column. A fixing frame is fixedly connected to one side of the base. A cylinder is fixedly connected to one side of the top of the fixing frame. A motor is mounted on the telescopic end of the cylinder, and a drilling tool is mounted on the output end of the motor. The position of the drilling tool corresponds to the position of the top of the bearing column of the steering knuckle workpiece. A correction component for dynamically correcting the position of the bearing column of the steering knuckle workpiece is provided inside the base. The correction component includes a fixing seat fixedly connected to the bottom of the base, and a fixing plate fixedly connected to the top of the fixing seat. The center of the top of the fixing plate is fixed... A guide plate is fixedly connected, and a cross groove is opened on the top of the guide plate. Four movable plates are equidistantly slidably installed on the top of the guide plate. The outer sides of the movable plates are slidably installed in the four sides of the cross groove, and a central column is slidably installed in the center of the cross groove. The four movable plates are respectively provided with inclined contact parts at one end near the central column. The inclined contact parts contact the outer periphery of the bottom of the central column. A tapered column is slidably installed inside the top of the central column. The top of the tapered column contacts the bottom of the middle part of the bearing column of the steering knuckle workpiece. A stabilizing component is provided on the top of the base. The stabilizing component is used to assist in clamping and positioning the steering knuckle workpiece. The correction component and the stabilizing component cooperate with each other to automatically correct and stabilize the position of the bearing column during the machining of the steering knuckle workpiece, so as to improve the coaxial accuracy during machining.

[0006] Preferably, a first spring is installed inside the central column, and the top end of the first spring is fixedly connected to the bottom end of the conical column. Four connecting cylinders are fixedly connected at equal intervals in a ring on the top of the fixed plate. A connecting rod is slidably installed inside the connecting cylinder. One end of the connecting rod is fixedly connected to the end of the moving plate away from the central column. A second spring is installed inside the connecting cylinder. One end of the second spring is fixedly connected to the inner wall of the connecting cylinder away from the moving plate, and the other end of the second spring is fixedly connected to the outer side of the connecting rod near the moving plate.

[0007] Preferably, a fixing ring is fixedly connected inside the fixing disk, and four racks are equidistantly slidably installed in the inner annular shape of the fixing disk and the top of the fixing ring. The end of the connecting rod away from the moving plate passes through the interior of the connecting cylinder and is fixedly connected to a connecting plate. One side of the bottom end of the connecting plate is fixedly connected to the end of the rack away from the fixing disk, and the teeth of the four racks are arranged in the same circumferential direction.

[0008] Preferably, four gears are rotatably mounted inside the fixed disk via a shaft, and the teeth of the four gears are respectively meshed with the teeth of four racks. A gear ring is rotatably mounted inside the bottom of the fixed disk, and the teeth of the gear ring are meshed with the teeth of the gears.

[0009] Preferably, an adjusting plate is rotatably mounted inside the bottom of the fixed base. The adjusting plate has multiple arc-shaped holes equidistantly arranged in a ring inside. The paths of the arc-shaped holes extend from the center of the adjusting plate to the outside of the adjusting plate. A fixing post is fixedly connected inside the bottom of the fixed base. Multiple track plates are fixedly connected equidistantly in a ring outside the fixing post. A guide plate is slidably mounted inside the track plate. A positioning bolt is fixedly connected to the top of one end of the guide plate. The top of the positioning bolt is slidably connected to the inside of the arc-shaped hole. The bottom of the toothed ring is fixedly connected to the top of the adjusting plate through a connecting ring.

[0010] Preferably, an L-shaped rod is fixedly connected to the end of the guide plate away from the track plate through the side wall of the fixed seat. A positioning ring is fixedly connected to the end of the L-shaped rod away from the guide plate. The positioning ring is arc-shaped, and the shape formed by multiple positioning rings is annular. The positioning ring is located at the bottom inside the alignment ring. The inner diameter of the annular ring formed by the positioning rings is larger than the outer diameter of the bearing column and smaller than the average value of the outer diameter of the bearing column and the inner diameter of the alignment ring. When the rack moves in a direction away from the center of the fixed plate, the multiple L-shaped rods drive the positioning rings to move synchronously towards the center position.

[0011] Preferably, a protective cylinder is fixedly connected to the top of the fixed plate. The top of the protective cylinder is conical in shape, and an elastic cloth is fixedly connected inside the top of the protective cylinder. The middle part of the elastic cloth is fixedly connected to the outside of the middle part of the central column.

[0012] Preferably, the stabilizing component includes multiple U-shaped frames fixedly connected to the top of the base. Spring plates are fixedly connected to both sides of the inside of the top of the U-shaped frame. The positions of the two spring plates on the top of the U-shaped frame are corresponding. The fork and support arm of the steering knuckle workpiece are respectively inserted between the two spring plates.

[0013] Preferably, three fixed cylinders are fixedly connected at equal intervals in a ring at the top of the base. A positioning rod is slidably installed inside the fixed cylinder. One end of the positioning rod is fixedly connected to an arc-shaped plate, the position of which corresponds to the position of the side wall of the steering knuckle workpiece. A third spring is installed inside the fixed cylinder, one end of which is fixedly connected to the inner wall of the fixed cylinder away from the steering knuckle workpiece, and the other end of which is fixedly connected to the outer side of the positioning rod near the arc-shaped plate. A lower trapezoidal block is fixedly connected through the interior of the fixed cylinder at the end of the cylinder away from the arc-shaped plate. A triangular plate is fixedly connected to the outer side of the cylinder extension end. Alignment rods are fixedly connected to the bottom of the three ends of the triangular plate. An upper trapezoidal block is fixedly connected to the bottom of the alignment rod. The position of the upper trapezoidal block corresponds to the position of the lower trapezoidal block, and the bottom of the upper trapezoidal block is higher than the height corresponding to the initial machining position of the hole punch. When the cylinder extension end moves downward, the inclined side of the upper trapezoidal block gradually contacts the inclined side of the lower trapezoidal block and pushes the positioning rod to move.

[0014] A process for machining steering knuckle bearing holes, using the aforementioned equipment for machining steering knuckle bearing holes, includes the following steps: S1: Place the steering knuckle workpiece on top of the alignment ring, so that the bottom bearing column of the steering knuckle workpiece extends into the alignment ring, and the fork and support arm of the steering knuckle workpiece are engaged between multiple spring plates. At this time, the steering knuckle workpiece is in an elastic support state.

[0015] S2: The start cylinder drives the motor and the drilling cutter to move downwards, so that the drilling cutter contacts the top of the steering knuckle workpiece and begins drilling.

[0016] S3: During the drilling process, when the steering knuckle workpiece is subjected to cutting force and causes a slight displacement, the tapered column follows the position change of the bearing column and pushes the center column to move, causing the center column to push the moving plate in the corresponding direction to move.

[0017] S4: The moving plate drives the connecting rod and the connecting plate to move, causing the rack and pinion to rotate, which in turn drives the gear ring and the adjusting plate to rotate, thereby driving multiple guide plates to move. The guide plates drive multiple positioning rings to gradually approach the bearing column, surround and limit the bearing column, and realize automatic coaxial correction.

[0018] S5: As the drilling cutter continues to move down to the middle and late stages of drilling, the upper trapezoidal block comes into contact with the lower trapezoidal block, causing the positioning rod to drive the arc plate to move towards the side wall of the steering knuckle workpiece, and clamping and positioning the steering knuckle workpiece to improve processing stability.

[0019] S6: After the bearing hole machining is completed, the cylinder retracts, and each component returns to its initial state under the action of the spring, and the steering knuckle workpiece is removed.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a correction component and a stabilizing component, the two work together to form a dynamic processing mode of "automatic correction in the early stage and enhanced stabilization in the middle and later stages" for the steering knuckle workpiece during the processing. In the initial stage of processing, the correction component uses the workpiece's own position change to automatically drive the positioning ring to dynamically correct the bearing column, so that the workpiece can automatically return to the coaxial position. As the drilling depth increases, the stabilizing component further clamps and fixes the outside of the steering knuckle workpiece, improving the overall support strength. This ensures that the steering knuckle workpiece maintains a stable processing posture throughout the drilling process. This avoids the problem of the initial positioning error being uncorrectable due to traditional one-time rigid clamping, and reduces the impact of later processing vibration on the hole processing quality, thereby improving the coaxiality, roundness, and processing accuracy of the bearing hole.

[0021] By setting a correction component, the steering knuckle workpiece is in an elastically supported state during the initial stage of machining. When the steering knuckle workpiece experiences a slight offset due to the cutting force during drilling, the tapered column follows the position change of the workpiece bearing column, pushing the central column to undergo relative displacement. The central column then pushes the corresponding moving plate to move according to the offset direction, causing the connecting rod to drive the rack to move. The rack drives the gear to rotate and drives the gear ring and adjusting plate to rotate, thereby causing multiple guide plates to move synchronously. This drives the positioning ring to gradually approach the outside of the bearing column and surround and limit it, achieving automatic correction of the position of the steering knuckle workpiece bearing column. This ensures that the workpiece can maintain a coaxial state during machining, reducing hole position deviations caused by offset and improving the machining accuracy of the bearing hole.

[0022] By setting up a stabilizing component, during the process of the cylinder driving the motor and the drilling cutter to move downwards, the upper trapezoidal block and the lower trapezoidal block make contact with each other. When the drilling cutter reaches the middle and late stages of drilling, the positioning rod is driven to move, so that the arc plate gradually moves closer to the outside of the steering knuckle workpiece and clamps and positions it. Since the stabilizing component does not participate in restricting the workpiece position in the initial stage, it can avoid interfering with the automatic alignment process of the correction component. In the stage where the drilling depth gradually increases and the cutting force and vibration gradually increase, it forms auxiliary support in time, thereby improving the overall stability of the steering knuckle workpiece and reducing the machining errors caused by workpiece shaking and vibration. Attached Figure Description

[0023] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0024] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the stabilization component of the present invention; Figure 3 This is a side cross-sectional view of the fixing base of the present invention; Figure 4 This is a schematic diagram of the internal structure of the base of the present invention; Figure 5 This is a schematic diagram of the internal structure of the protective cylinder of the present invention; Figure 6 This is a schematic diagram of the internal structure of the fixed disk of the present invention; Figure 7 This is a magnified schematic diagram of the adjustment disk structure of the present invention.

[0025] [Figure Labels] 1. Base; 2. Fixing frame; 3. Cylinder; 4. Triangular plate; 5. Motor; 6. Alignment rod; 7. Upper trapezoidal block; 8. Hole cutter; 9. Alignment ring; 10. Steering knuckle workpiece; 11. U-shaped frame; 12. Spring plate; 13. Fixing cylinder; 14. Positioning rod; 15. Arc plate; 16. Lower trapezoidal block; 17. Protective cylinder; 18. Elastic cloth; 19. Fixing seat; 20. Fixing plate; 21. Guide plate; 22. Moving plate; 23. Center column; 24. Conical column; 25. Connecting cylinder; 26. Connecting rod; 27. Connecting plate; 28. Gear ring; 29. ​​Gear; 30. Fixing ring; 31. Rack; 32. Adjusting plate; 33. Arc hole; 34. Positioning bolt; 35. Track plate; 36. Guide plate; 37. L-shaped rod; 38. Positioning ring; 39. Fixing column.

[0026] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0027] The following is a detailed description of the steering knuckle bearing hole machining equipment and machining process provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; for some known technologies, those skilled in the art can also use other alternative methods to implement the invention; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0028] like Figures 1 to 7As shown, an embodiment of the present invention provides a steering knuckle bearing hole machining device, including a base 1. A positioning ring 9 is fixedly connected to the center of the top of the base 1. A steering knuckle workpiece 10 is mounted on the top of the positioning ring 9, and a bearing column is fixedly connected to the bottom of the steering knuckle workpiece 10. The inner diameter of the positioning ring 9 is larger than the outer diameter of the bearing column of the steering knuckle workpiece 10. A fixing frame 2 is fixedly connected to one side of the base 1. A cylinder 3 is fixedly connected to one side of the top of the fixing frame 2. A motor 5 is mounted on the telescopic end of the cylinder 3, and a drilling cutter 8 is mounted on the output end of the motor 5. The position of the drilling cutter 8 corresponds to the position of the top of the bearing column of the steering knuckle workpiece 10. A correction component for dynamically correcting the position of the bearing column of the steering knuckle workpiece 10 is provided inside the base 1. The correction component includes a fixing seat 19 fixedly connected to the bottom of the base 1, and a fixing plate 20 fixedly connected to the top of the fixing seat 19. A guide plate 21 is fixedly connected to the center of the top. A cross groove is opened on the top of the guide plate 21. Four movable plates 22 are equidistantly slidably installed on the top of the guide plate 21. The outer sides of the movable plates 22 are slidably installed in the four sides of the cross groove. A central column 23 is slidably installed in the center of the cross groove. The ends of the four movable plates 22 near the central column 23 are respectively provided with inclined contact parts. The inclined contact parts contact the outer periphery of the bottom of the central column 23. A tapered column 24 is slidably installed inside the top of the central column 23. The top of the tapered column 24 contacts the bottom of the middle part of the bearing column of the steering knuckle workpiece 10. A stabilizing component is provided on the top of the base 1. The stabilizing component is used to assist in clamping and positioning the steering knuckle workpiece 10. The correction component and the stabilizing component cooperate with each other to automatically correct and stabilize the position of the bearing column during the machining of the steering knuckle workpiece 10, so as to improve the coaxial accuracy during machining.

[0029] By using the correction and stabilization components, which work together in a coordinated manner, the steering knuckle workpiece 10 can form a dynamic machining mode of "automatic correction in the early stage and enhanced stabilization in the middle and later stages" during the machining process. In the initial stage of machining, the correction component automatically drives the positioning ring 38 to dynamically correct the bearing column by utilizing the workpiece's own position change, so that the workpiece can automatically return to the coaxial position. As the drilling depth increases, the stabilization component further clamps and fixes the outside of the steering knuckle workpiece 10, improving the overall support strength. This ensures that the steering knuckle workpiece 10 maintains a stable machining posture throughout the drilling process. This avoids the problem of the initial positioning error being uncorrectable due to traditional one-time rigid clamping, and also reduces the impact of later machining vibration on the hole machining quality, thereby improving the coaxiality, roundness, and machining accuracy of the bearing hole.

[0030] like Figures 3 to 7As shown, a first spring is installed inside the central column 23, and the top end of the first spring is fixedly connected to the bottom end of the conical column 24. Four connecting cylinders 25 are fixedly connected at equal intervals in a ring on the top of the fixed disk 20. A connecting rod 26 is slidably installed inside the connecting cylinder 25. One end of the connecting rod 26 is fixedly connected to the end of the moving plate 22 away from the central column 23. A second spring is installed inside the connecting cylinder 25. One end of the second spring is fixedly connected to the inner wall of the end of the connecting cylinder 25 away from the moving plate 22, and the other end of the second spring is fixedly connected to the outside of the connecting rod 26 near the moving plate 22.

[0031] Through the movable plate 22, the first spring provides an upward elastic support force to the tapered column 24, ensuring that the tapered column 24 always maintains close contact with the bottom of the bearing column of the steering knuckle workpiece 10. When the steering knuckle workpiece 10 is slightly offset due to the cutting force during drilling, the tapered column 24 follows the position change of the bearing column, causing the central column 23 to move in the corresponding direction and pushing the movable plate 22 at the corresponding position to move along the inside of the guide plate 21. At the same time, the movable plate 22 causes the connecting rod 26 to slide inside the connecting cylinder 25, compressing the second spring and providing elastic buffering and return function for the subsequent movable plates 22. This allows each movable plate 22 to move adaptively according to the offset direction and return to its initial position after correction. This not only improves the stability and flexibility of the mechanism during operation but also reduces the impact of instantaneous impact on the mechanism, avoids motion jamming or overcorrection due to rigid contact, and improves the smoothness and reliability of the automatic correction process.

[0032] like Figures 3 to 7 As shown, a fixing ring 30 is fixedly connected inside the fixing disk 20. Four racks 31 are equidistantly mounted in an annular shape inside the fixing disk 20 and the top of the fixing ring 30. The end of the connecting rod 26 away from the moving plate 22 passes through the inside of the connecting cylinder 25 and is fixedly connected to a connecting plate 27. One side of the bottom end of the connecting plate 27 is fixedly connected to the end of the rack 31 away from the fixing disk 20. The teeth of the four racks 31 are arranged in the same circumferential direction. Four gears 29 are rotatably mounted inside the fixing disk 20 via a shaft. The teeth of the four gears 29 are respectively meshed with the teeth of the four racks 31. A toothed ring 28 is rotatably mounted inside the bottom of the fixing disk 20. The teeth of the toothed ring 28 are meshed with the teeth of the gears 29.

[0033] With the set gear ring 28, when the connecting rod 26 moves with the moving plate 22, the connecting rod 26 drives the corresponding rack 31 to move radially along the inside of the fixed plate 20 through the connecting plate 27. Since the teeth of the four racks 31 are set along the same circumferential direction, the movement of the rack 31 can drive the gear 29 meshing with it to rotate synchronously, and at the same time drive the gear ring 28 to rotate as a whole. This converts the local displacement generated by the moving plate 22 on one side into the overall linkage motion of the gear ring 28, realizing the synchronous drive of the subsequent structure. This allows the local displacement generated by the workpiece offset to be stably transmitted to the entire correction mechanism, which not only improves the continuity and synchronization of motion transmission, but also avoids the problem of uneven correction action caused by local force.

[0034] like Figures 3 to 7 As shown, an adjusting plate 32 is rotatably mounted inside the bottom of the fixed base 19. Multiple arc-shaped holes 33 are equidistantly arranged in an annular pattern inside the adjusting plate 32. The path of the arc-shaped holes 33 extends from the middle of the adjusting plate 32 to the outside of the adjusting plate 32. A fixing post 39 is fixedly connected inside the bottom of the fixed base 19. Multiple track plates 35 are fixedly connected in an annular pattern to the outside of the fixing post 39. A guide plate 36 is slidably mounted inside the track plate 35. A positioning bolt 34 is fixedly connected to the top of one end of the guide plate 36. The top of the positioning bolt 34 is slidably connected to the inside of the arc-shaped holes 33. The bottom of the toothed ring 28 is fixedly connected to the top of the adjusting plate 32 through a connecting ring. When the gear ring 28 rotates under the action of the front-end transmission structure via the adjustable disc 32, the adjusting disc 32 rotates synchronously through the connecting ring. Since multiple positioning bolts 34 are slidably engaged with the arc-shaped holes 33 inside the adjusting disc 32, and the path of the arc-shaped holes 33 extends from the center of the adjusting disc 32 to the outside, the adjusting disc 32 will drive the positioning bolts 34 to move along the trajectory of the arc-shaped holes 33 during rotation. The positioning bolts 34 further drive the guide plates 36 to slide linearly along the inside of the track plate 35, thereby converting the rotational motion of the adjusting disc 32 into the synchronous linear motion of multiple guide plates 36, realizing the linkage adjustment of the subsequent positioning structure, and enabling the front-end offset signal to be further converted into a stable correction action. This not only improves the continuity and reliability of motion conversion, but also enables multiple guide plates 36 to move synchronously, avoiding the problem of uneven force caused by unilateral adjustment.

[0035] like Figures 3 to 7As shown, an L-shaped rod 37 is fixedly connected to the end of the guide plate 36 away from the track plate 35 through the side wall of the fixed seat 19. A positioning ring 38 is fixedly connected to the end of the L-shaped rod 37 away from the guide plate 36. The positioning ring 38 is arc-shaped, and the shape of multiple positioning rings 38 is annular. The positioning ring 38 is located at the bottom inside the alignment ring 9. The inner diameter of the annular shape formed by the positioning rings 38 is larger than the outer diameter of the bearing column and smaller than the average value of the outer diameter of the bearing column and the inner diameter of the alignment ring 9. When the rack 31 moves in a direction away from the center of the fixed plate 20, the multiple L-shaped rods 37 drive the positioning ring 38 to move synchronously towards the center position. With the positioning rings 38 in place, when the rack 31 moves away from the center of the fixed disk 20 under the action of the front linkage structure, the guide plate 36 slides inside the track plate 35 through the front motion transmission. The guide plate 36 further drives the L-shaped rod 37 to move synchronously, so that the multiple positioning rings 38 gradually move closer to the center position. Since the multiple positioning rings 38 form a ring structure, and their initial inner diameter is larger than the outer diameter of the bearing column and smaller than the average value of the outer diameter of the bearing column and the inner diameter of the alignment ring 9, the positioning rings 38 can gradually contact the outer wall of the bearing column and form a surrounding limit during the movement towards the center, providing continuous support and position correction for the bearing column. This allows the bearing column to automatically return to a relatively centered state when a slight offset occurs. This not only realizes the automatic correction of the workpiece offset position, but also forms multi-point uniform support, avoiding secondary offset caused by unilateral force, and improving the coaxial accuracy and overall stability of the workpiece during processing.

[0036] like Figures 3 to 7 As shown, a protective cylinder 17 is fixedly connected to the top of the fixed plate 20. The top of the protective cylinder 17 is conical in shape, and an elastic cloth 18 is fixedly connected inside the top of the protective cylinder 17. The middle part of the elastic cloth 18 is fixedly connected to the outside of the middle part of the central column 23. The protective cylinder 17 and elastic cloth 18 are designed to protect the internal structure of the protective cylinder 17, preventing debris from falling into the transmission mechanism during processing and reducing its service life. The conical protective cylinder 17 facilitates the accumulation of debris at the bottom of the base 1 for easy collection. The elastic cloth 18 is made of elastic material, which facilitates the movement of the central column 23 and provides comprehensive protection for the fixed base 19 and the internal structure of the protective cylinder 17.

[0037] like Figure 1 and Figure 2 As shown, the stabilizing assembly includes multiple U-shaped frames 11 fixedly connected to the top of the base 1. Spring plates 12 are fixedly connected to both sides of the inside of the top of the U-shaped frame 11. The positions of the two spring plates 12 on the top of the U-shaped frame 11 are corresponding. The fork and support arm of the steering knuckle workpiece 10 are respectively inserted between the two spring plates 12. By using the U-shaped frame 11, the fork and support arm of the steering knuckle workpiece 10 are placed inside multiple U-shaped frames 11 and locked between two corresponding spring plates 12. The spring plates 12 use their own elasticity to fit and support the outside of the steering knuckle workpiece 10, so that the steering knuckle workpiece 10 can be placed stably in the initial stage of processing, while retaining a certain amount of room for movement, which facilitates the automatic adjustment of the workpiece position by the subsequent correction component. This not only avoids significant shaking of the workpiece, but also reduces the impact of the initial rigid clamping on the automatic alignment process, thereby improving the stability and correction effect of the workpiece positioning.

[0038] like Figure 1 and Figure 2 As shown, three fixed cylinders 13 are fixedly connected at equal intervals in a ring at the top of the base 1. A positioning rod 14 is slidably installed inside the fixed cylinder 13. One end of the positioning rod 14 is fixedly connected to an arc-shaped plate 15, the position of which corresponds to the position of the side wall of the steering knuckle workpiece 10. A third spring is installed inside the fixed cylinder 13, with one end fixedly connected to the inner wall of the fixed cylinder 13 away from the steering knuckle workpiece 10, and the other end fixedly connected to the outer side of the positioning rod 14 near the arc-shaped plate 15. The positioning rod 14 is located away from the arc-shaped plate. One end of 15 passes through the interior of the fixed cylinder 13 and is fixedly connected to a lower trapezoidal block 16. A triangular plate 4 is fixedly connected to the outside of the telescopic end of the cylinder 3. Alignment rods 6 are fixedly connected to the bottom of the three ends of the triangular plate 4. An upper trapezoidal block 7 is fixedly connected to the bottom of the alignment rod 6. The position of the upper trapezoidal block 7 corresponds to the position of the lower trapezoidal block 16, and the bottom position of the upper trapezoidal block 7 is higher than the height corresponding to the initial processing position of the hole punch 8. When the telescopic end of the cylinder 3 moves downward, the inclined side of the upper trapezoidal block 7 gradually contacts the inclined side of the lower trapezoidal block 16 and pushes the positioning rod 14 to move. During processing, the extension end of the cylinder 3 drives the motor 5 and the drilling cutter 8 to move downwards via the arc plate 15. The positioning rod 6 moves downwards synchronously. When the drilling cutter 8 reaches the middle and late stages of processing, the upper trapezoidal block 7 gradually contacts the lower trapezoidal block 16. The cooperation between the inclined surfaces pushes the positioning rod 14 to slide inside the fixed cylinder 13, so that the positioning rod 14 drives the arc plate 15 to gradually approach the side wall of the steering knuckle workpiece 10 and fit and support it. At the same time, the third spring provides buffering and elasticity during the movement, so that the arc plate 15 can stably fit against the outside of the workpiece. This not only further improves the overall stability of the steering knuckle workpiece 10 in the later stages of processing and reduces the impact of cutting vibration on the workpiece, but also avoids interference from direct rigid clamping in the early stages on the automatic correction process, thus improving the stability and processing accuracy during the processing.

[0039] Embodiments of the present invention also provide a steering knuckle bearing hole machining process, which, using the aforementioned steering knuckle bearing hole machining equipment, includes the following steps: S1: Place the steering knuckle workpiece 10 on top of the alignment ring 9, so that the bottom bearing column of the steering knuckle workpiece 10 extends into the alignment ring 9, and the fork and support arm of the steering knuckle workpiece 10 are engaged between multiple spring plates 12. At this time, the steering knuckle workpiece 10 is in an elastic support state.

[0040] S2: The starting cylinder 3 drives the motor 5 and the drilling cutter 8 to move downwards, so that the drilling cutter 8 contacts the top of the steering knuckle workpiece 10 and begins drilling.

[0041] S3: During the drilling process, when the steering knuckle workpiece 10 is subjected to cutting force and causes a slight displacement, the tapered column 24 follows the change in the position of the bearing column and pushes the central column 23 to move, so that the central column 23 pushes the moving plate 22 in the corresponding direction to move.

[0042] S4: The moving plate 22 drives the connecting rod 26 and the connecting plate 27 to move, causing the rack 31 to drive the gear 29 to rotate, and drive the gear ring 28 and the adjusting plate 32 to rotate, thereby driving multiple guide plates 36 to move. The guide plates 36 drive multiple positioning rings 38 to gradually approach the bearing column, surround and limit the outside of the bearing column, and realize automatic coaxial correction.

[0043] S5: As the drilling cutter 8 continues to move down to the middle and late stages of drilling, the upper trapezoidal block 7 comes into contact with the lower trapezoidal block 16, causing the positioning rod 14 to drive the arc plate 15 to move towards the side wall of the steering knuckle workpiece 10, and clamping and positioning the steering knuckle workpiece 10 to improve processing stability.

[0044] S6: After the bearing hole machining is completed, cylinder 3 retracts, and each component returns to its initial state under the action of the spring. Steering knuckle workpiece 10 is then removed.

[0045] Compared to existing technologies, the above-mentioned steering knuckle bearing hole machining process employs a machining method that utilizes early-stage elastic support, mid-stage automatic coaxial correction, and late-stage enhanced stability. This allows the steering knuckle workpiece 10 to dynamically adjust according to the machining state throughout the entire bearing hole machining process. In the initial machining stage, it preserves fine-tuning space for the workpiece, avoiding initial rigid clamping that retains positioning errors. When the workpiece experiences slight displacement due to cutting forces, the correction mechanism automatically and dynamically corrects the bearing column position, ensuring the workpiece maintains a good coaxial state. As the drilling depth increases, an auxiliary clamping structure provides stable external support for the workpiece, thereby reducing the impact of machining vibration and displacement on machining accuracy and improving the coaxiality, roundness, and overall machining quality of the bearing hole.

[0046] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details.

[0047] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A steering knuckle bearing hole machining device, comprising a base (1), wherein an alignment ring (9) is fixedly connected to the middle of the top of the base (1), a steering knuckle workpiece (10) is mounted on the top of the alignment ring (9), a bearing column is fixedly connected to the bottom of the steering knuckle workpiece (10), and the inner diameter of the alignment ring (9) is larger than the outer diameter of the bearing column of the steering knuckle workpiece (10), a fixing frame (2) is fixedly connected to one side of the base (1), a cylinder (3) is fixedly connected to one side of the top of the fixing frame (2), a motor (5) is mounted on the telescopic end of the cylinder (3), and a hole-opening cutter (8) is mounted on the output end of the motor (5), wherein the position of the hole-opening cutter (8) corresponds to the position of the top of the bearing column of the steering knuckle workpiece (10), characterized in that, The base (1) is provided with a correction component for dynamically correcting the position of the bearing column of the steering knuckle workpiece (10). The correction component includes a fixed seat (19) fixedly connected to the bottom of the base (1). A fixed plate (20) is fixedly connected to the top of the fixed seat (19). A guide plate (21) is fixedly connected to the middle of the top of the fixed plate (20). A cross groove is opened on the top of the guide plate (21). Four movable plates (22) are equidistantly mounted on the top of the guide plate (21). The outer side of the movable plates (22) is slidably mounted in the four sides of the cross groove. A central column (23) is slidably mounted in the middle of the cross groove. An inclined contact part is provided at one end of the four movable plates (22) near the central column (23). The inclined contact part is in contact with the outer periphery of the bottom of the central column (23). A tapered column (24) is slidably mounted inside the top of the central column (23). The top of the tapered column (24) is in contact with the bottom of the middle part of the bearing column of the steering knuckle workpiece (10). The base (1) is provided with a stabilizing component on its top, which is used to assist in clamping and positioning the steering knuckle workpiece (10). The correction component and the stabilizing component work together to automatically correct and stabilize the position of the bearing column during the machining of the steering knuckle workpiece (10), so as to improve the coaxial accuracy during machining.

2. The steering knuckle bearing hole machining equipment according to claim 1, characterized in that, The center column (23) is equipped with a first spring, and the top of the first spring is fixedly connected to the bottom of the conical column (24). The top of the fixed plate (20) is fixedly connected with four connecting cylinders (25) at equal intervals in a ring. The connecting cylinder (25) is slidably installed with a connecting rod (26) inside. One end of the connecting rod (26) is fixedly connected to the end of the moving plate (22) away from the center column (23). The connecting cylinder (25) is equipped with a second spring, one end of the second spring is fixedly connected to the inner wall of the end of the connecting cylinder (25) away from the moving plate (22), and the other end of the second spring is fixedly connected to the outside of the connecting rod (26) near the moving plate (22).

3. The steering knuckle bearing hole machining equipment according to claim 2, characterized in that, The fixed ring (30) is fixedly connected inside the fixed disk (20). Four racks (31) are equidistantly mounted on the top of the fixed disk (20) and the fixed ring (30). The end of the connecting rod (26) away from the moving plate (22) passes through the inside of the connecting cylinder (25) and is fixedly connected to the connecting plate (27). One side of the bottom end of the connecting plate (27) is fixedly connected to the end of the rack (31) away from the fixed disk (20). The teeth of the four racks (31) are arranged in the same circumferential direction.

4. The steering knuckle bearing hole machining equipment according to claim 3, characterized in that, The fixed disk (20) has four gears (29) rotatably mounted inside via a shaft. The teeth of the four gears (29) are respectively meshed with the teeth of four racks (31). A toothed ring (28) is rotatably mounted inside the bottom of the fixed disk (20). The teeth of the toothed ring (28) are meshed with the teeth of the gears (29).

5. The steering knuckle bearing hole machining equipment according to claim 4, characterized in that, An adjusting plate (32) is rotatably mounted inside the bottom of the fixed base (19). Multiple arc-shaped holes (33) are equidistantly arranged in an annular pattern inside the adjusting plate (32). The path of the arc-shaped holes (33) extends from the middle of the adjusting plate (32) to the outside of the adjusting plate (32). A fixed column (39) is fixedly connected inside the bottom of the fixed base (19). Multiple track plates (35) are fixedly connected in an annular pattern outside the fixed column (39). A guide plate (36) is slidably mounted inside the track plate (35). A positioning bolt (34) is fixedly connected to the top of one end of the guide plate (36). The top of the positioning bolt (34) is slidably connected to the inside of the arc-shaped holes (33). The bottom of the toothed ring (28) is fixedly connected to the top of the adjusting plate (32) through a connecting ring.

6. The steering knuckle bearing hole machining equipment according to claim 5, characterized in that, The guide plate (36) is fixedly connected to an L-shaped rod (37) through the side wall of the fixed seat (19) at one end away from the track plate (35). The L-shaped rod (37) is fixedly connected to a positioning ring (38) at one end away from the guide plate (36). The positioning ring (38) is arc-shaped, and the multiple positioning rings (38) form a ring. The positioning ring (38) is located at the bottom inside the alignment ring (9). The inner diameter of the ring formed by the positioning rings (38) is larger than the outer diameter of the bearing column and smaller than the average value of the outer diameter of the bearing column and the inner diameter of the alignment ring (9). When the rack (31) moves in a direction away from the center of the fixed plate (20), the multiple L-shaped rods (37) drive the positioning rings (38) to move synchronously towards the center position.

7. The steering knuckle bearing hole machining equipment according to claim 6, characterized in that, The top of the fixed plate (20) is fixedly connected to a protective cylinder (17). The top of the protective cylinder (17) is conical in shape, and an elastic cloth (18) is fixedly connected inside the top of the protective cylinder (17). The middle part of the elastic cloth (18) is fixedly connected to the outside of the middle part of the central column (23).

8. The steering knuckle bearing hole machining equipment according to claim 1, characterized in that, The stabilizing component includes multiple U-shaped frames (11) fixedly connected to the top of the base (1). Spring plates (12) are fixedly connected to both sides of the top of the U-shaped frame (11). The positions of the two spring plates (12) on the top of the U-shaped frame (11) are corresponding. The fork and support arm of the steering knuckle workpiece (10) are respectively inserted between the two spring plates (12).

9. The steering knuckle bearing hole machining equipment according to claim 8, characterized in that, The top of the base (1) is fixedly connected with three fixed cylinders (13) at equal intervals in a ring. A positioning rod (14) is slidably installed inside the fixed cylinder (13). One end of the positioning rod (14) is fixedly connected to an arc plate (15). The position of the arc plate (15) corresponds to the position of the side wall of the steering knuckle workpiece (10). A third spring is installed inside the fixed cylinder (13). One end of the third spring is fixedly connected to the inner wall of the fixed cylinder (13) away from the steering knuckle workpiece (10), and the other end of the third spring is fixedly connected to the outer side of the positioning rod (14) near the arc plate (15). The positioning rod (14) is away from the arc plate (15). One end of the cylinder (3) is fixedly connected to the interior of the fixed cylinder (13) with a lower trapezoidal block (16). The external end of the cylinder (3) is fixedly connected to a triangular plate (4). The bottom of the three ends of the triangular plate (4) is fixedly connected to an alignment rod (6). The bottom end of the alignment rod (6) is fixedly connected to an upper trapezoidal block (7). The position of the upper trapezoidal block (7) corresponds to the position of the lower trapezoidal block (16). The bottom end of the upper trapezoidal block (7) is higher than the height corresponding to the initial processing position of the hole punch (8). The cylinder (3) moves downward, and the inclined side of the upper trapezoidal block (7) gradually contacts the inclined side of the lower trapezoidal block (16) and pushes the positioning rod (14) to move.

10. A steering knuckle bearing hole machining process, applied to the steering knuckle bearing hole machining equipment as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Place the steering knuckle workpiece (10) on top of the alignment ring (9), so that the bottom bearing column of the steering knuckle workpiece (10) extends into the alignment ring (9), and the fork and support arm of the steering knuckle workpiece (10) are engaged between multiple spring plates (12). At this time, the steering knuckle workpiece (10) is in an elastic support state. S2: Start cylinder (3) drives motor (5) and drilling tool (8) to move downward, so that drilling tool (8) contacts the top of steering knuckle workpiece (10) and starts drilling. S3: During the drilling process, when the steering knuckle workpiece (10) is subjected to cutting force and causes a slight displacement, the tapered column (24) follows the change in the position of the bearing column and pushes the central column (23) to move, so that the central column (23) pushes the moving plate (22) in the corresponding direction to move. S4: The moving plate (22) drives the connecting rod (26) and the connecting plate (27) to move, causing the rack (31) to drive the gear (29) to rotate, and driving the gear ring (28) and the adjusting plate (32) to rotate, thereby driving multiple guide plates (36) to move. The guide plates (36) drive multiple positioning rings (38) to gradually approach the bearing column, surround and limit the outside of the bearing column, and realize automatic coaxial correction. S5: As the piercing cutter (8) continues to move down to the middle and late stages of drilling, the upper trapezoidal block (7) comes into contact with the lower trapezoidal block (16), causing the positioning rod (14) to drive the arc plate (15) to move toward the side wall of the steering knuckle workpiece (10) and clamp and position the steering knuckle workpiece (10) to improve processing stability. S6: After the bearing hole machining is completed, the cylinder (3) retracts, and each component returns to its initial state under the action of the spring. The steering knuckle workpiece (10) is then removed.

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