Centering, punching and pin pressing device for input shaft of automobile steering device

Abstract

The invention relates to the technical field of automobile part machining, in particular to an automobile steering device input shaft centering, punching and pin pressing device which comprises a machining table, the two ends of the top of the machining table are slidably connected with sliding bases and fixedly connected with mounting frames correspondingly, and first cambered surface grooves are formed in the tops of the sliding bases; a fixed base is fixedly connected to the interior of the mounting frame, a second cambered surface groove is formed in the top of the fixed base, a vertical through hole is formed in the fixed base, the vertical through hole communicates with the second cambered surface groove, and a connecting sleeve is arranged in the vertical through hole; through cooperation of the limiting ring and the telescopic sleeve, the centering degree of a drill hole and a limiting hole can be detected while the drill hole in the surface of the input shaft and the limiting hole in the surface of the steering column are limited, so that insertion centering of the input shaft and the steering column is ensured, and the error rate of pin pressing is reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing technology, and in particular to a centering and drilling pin device for automotive steering input shafts. Background Technology

[0002] The function of the steering shaft is to transmit the steering torque applied by the driver to the steering gear. Its upper part is fixedly connected to the steering wheel, and its lower part is connected to the steering gear. The steering shaft passes through the steering column and is supported by bearings and bushings inside the column tube. Some steering shafts not only have a certain rigidity but also energy-absorbing functions, thus preventing injury.

[0003] Patent document CN113001181B discloses a device and method for centering and punching pins for a torsion bar of an automotive steering input shaft. The device includes: a frame; a centering mechanism mounted on the frame for aligning the torsion bar of the automotive steering input shaft to be processed; a turntable mechanism having a first station and a second station, which can be switched between the first station and the second station; and a clamping mechanism disposed on one side of the turntable mechanism corresponding to the centering mechanism. The clamping mechanism includes clamping components and positioning support components, which are respectively mounted on the first station and the second station.

[0004] In the prior art, the steering input shaft needs to be drilled and inserted into the steering column. A pin is used to limit the input shaft and the steering column. When the input shaft is inserted into the steering column, the axis of the drill hole on the surface of the input shaft needs to be completely aligned with the axis of the limiting hole on the surface of the steering column for the pin to be successfully inserted into the steering column and the input shaft. When the drill hole and the limiting hole are in a connected state but there is a deviation, the pin cannot pass smoothly along the connection between the drill hole and the limiting hole. When inserting the input shaft and the steering column, it is difficult to determine the alignment degree between the drill hole and the limiting hole, thus affecting the success rate of pin insertion. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and to propose a centering and drilling pin device for the input shaft of an automobile steering gear.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a centering and drilling pin device for an automotive steering gear input shaft, comprising a processing table, with sliding bases slidably connected to both ends of the top of the processing table and mounting brackets fixedly connected thereto, a first arc groove being provided on the top of the sliding bases, a fixed base being fixedly connected inside the mounting brackets, and a second arc groove being provided on the top of the fixed bases. A vertical through hole is provided on the fixed base, which is connected to the second arc groove. A connecting sleeve is provided inside the vertical through hole. A limit ring is fixedly connected to the top of the connecting sleeve. The limit ring is located inside the second arc groove. A telescopic sleeve is slidably inserted inside the limit ring. Multiple strip grooves are provided on the surface of the telescopic sleeve along the circumference. All of the strip grooves are located above the limit ring. Contact strips are slidably connected inside the strip grooves. The distance between the axis of the telescopic sleeve and the outer side of the contact strip is the same as the radius of the limit ring. Both the sliding base and the fixed base are equipped with clamping components. A drive displacement component is provided on the processing table. The drive displacement component is used to drive the sliding base to slide. A sliding clearance component is provided on the telescopic sleeve. When the sliding base moves towards the fixed base, the telescopic sleeve slides downward along the inside of the limiting ring, and multiple contact strips move into the telescopic sleeve along the corresponding strip grooves. A drilling component is provided on the processing table, and a pressure pin component is provided on the mounting bracket.

[0007] Preferably, the sliding clearance component includes a sliding rod disposed inside the connecting sleeve. The bottom end of the telescopic sleeve passes through the connecting sleeve and extends into the interior of the connecting sleeve before being fixedly connected to the top of the sliding rod. The bottom end of the sliding rod passes through the connecting sleeve and extends below the connecting sleeve before being fixedly connected to a connecting rod. Rotating rollers are rotatably connected to both ends of the connecting rod. A first spring is sleeved on the sliding rod and is fixedly connected between the telescopic sleeve and the connecting sleeve. Two guide blocks are fixedly connected to the side of the sliding base near the fixed base. Guide slopes are provided on both sides of the guide blocks, and the two guide blocks are respectively arranged opposite to the two rotating rollers. The telescopic sleeve has multiple movable strips slidably connected circumferentially inside, and the interior of multiple contact strips is fixedly connected to the corresponding movable strips. The surface of the telescopic sleeve has multiple connecting grooves circumferentially, and the multiple connecting grooves are all located below the limiting ring. Movable blocks are fixedly connected to the multiple movable strips. The connecting sleeve has multiple U-shaped frames fixedly connected circumferentially inside, and guide grooves are opened on both sides of the U-shaped frames. The guide grooves include vertical sections and inclined sections. The vertical sections are located below the inclined sections. Multiple movable blocks extend along the corresponding connecting grooves into the interior of the corresponding U-shaped frames. Circular pins are fixedly inserted into the movable blocks, and the two ends of the circular pins are located inside the corresponding inclined sections.

[0008] Preferably, a pressure sensor is fixedly installed on the connecting rod, and the pressure sensor is in contact with the bottom of the connecting sleeve.

[0009] Preferably, the pressure pin assembly includes a mounting strip, which is slidably connected inside the mounting frame and located above the second arc-shaped groove. A first electric cylinder is fixedly mounted on the top of the mounting frame, and the drive shaft of the first electric cylinder is fixedly connected to the top of the mounting strip. Two sliding grooves are opened at the bottom of the mounting strip, and sliders are slidably connected inside the two sliding grooves. A smooth rod is slidably inserted on each slider, and the two smooth rods are respectively fixedly connected inside the corresponding sliding grooves. A second spring is sleeved on each smooth rod, and the second spring is fixedly connected between the corresponding slider and the sliding groove. Arc-shaped buckles are fixedly connected to the bottom of the two sliders, and guide slopes are opened at the bottom of the two arc-shaped buckles. Pressure pin clearance components are provided on the arc-shaped buckles.

[0010] Preferably, a fixing rod is fixedly connected to the connecting sleeve. The fixing rod is located at the bottom of the fixing base. Sliding strips are fixedly connected to both sides of the fixing rod. Both sliding strips extend through the fixing base to the top of the fixing base and are then fixedly connected to the mounting strip.

[0011] Preferably, the push pin clearance assembly includes two movable rods, which are respectively fixedly connected to two arc-shaped buckles. A circular rod is fixedly inserted at the adjacent and far ends of the two movable rods. Two wedge-shaped frames are fixedly connected to the top of the fixed base, and the two wedge-shaped frames are respectively located below the two circular rods.

[0012] Preferably, the drilling assembly includes a lifting platform, a drilling machine is slidably connected inside the lifting platform, a second electric cylinder is fixedly installed on the top of the lifting platform, and the drive shaft of the second electric cylinder is fixedly connected to the drilling machine.

[0013] Preferably, the drive displacement assembly includes a connecting ring, which is fixedly connected to one side of the sliding base. A transmission screw is rotatably connected to the machining table, and the connecting ring is threaded onto the transmission screw. A servo motor is fixedly mounted on the machining table, and the output shaft of the servo motor is fixedly connected to one end of the transmission screw.

[0014] Preferably, the clamping assembly has two sets of clamping pressure bars, which are slidably connected to the top of the sliding base and the fixed base, respectively. Each set of clamping pressure bars has two bars, and the bottom of the adjacent side of the two clamping pressure bars in the same set is provided with an arc-shaped pressure groove. Two third electric cylinders are fixedly installed on the top of the sliding base and the fixed base, and the drive shaft of the third electric cylinder is fixedly connected to the corresponding clamping pressure bar.

[0015] Preferably, the top of the sliding base has an arc-shaped stepped structure, and the clamping strip at the top of the sliding base matches the top contour of the sliding base.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention uses a limiting ring and a telescopic sleeve to limit the drilling holes on the surface of the input shaft and the limiting holes on the surface of the steering column, while also detecting the alignment of the drilling holes and the limiting holes, thereby ensuring the alignment of the input shaft and the steering column during insertion and reducing the error rate of the pressing pin.

[0017] 2. When the drill hole on the input shaft is connected to the limiting hole on the steering column, the guide block moves away from the top of the rotating roller. After the rotating roller loses the squeezing and limiting effect of the guide block, the compressed first spring moves upward through the elastic reset action, and drives the telescopic sleeve to move upward. Multiple contact bars move outward synchronously, so that the telescopic sleeve enters the drill hole of the input shaft. Multiple contact bars move outward and contact the inner wall of the drill hole. When the drill hole on the surface of the input shaft and the limiting hole on the surface of the steering column are in a centered connection state, multiple contact bars contact the inner wall of the drill hole, and the telescopic sleeve moves upward to the initial position.

[0018] 3. When the drilled hole on the input shaft surface and the limiting hole on the steering column surface are aligned, the telescopic sleeve returns to its initial position and the pressure sensor re-contacts the connecting sleeve. After the pressure sensor detects pressure again, the controller connected to the pressure sensor controls the pin pressing assembly to press the pin. When the axis of the drilled hole on the input shaft surface and the axis of the limiting hole on the steering column surface are offset, multiple contact bars cannot move outward to their initial positions, preventing the telescopic sleeve from returning upward to its initial position. The pressure sensor loses contact pressure, thus restricting the pin pressing assembly from performing the pin pressing operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the first structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A in the diagram; Figure 3 For the present invention Figure 1 Enlarged schematic diagram of the structure at point B in the diagram; Figure 4 This is a schematic diagram of the second structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point C; Figure 6 This is a schematic diagram of the mating structure of the mounting bracket, fixing base, and mounting strip of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point D; Figure 8 This is a first cross-sectional schematic diagram of the mounting frame, fixing base, and mounting strip mating structure of the present invention; Figure 9 For the present invention Figure 8Enlarged schematic diagram of the structure at point E in the diagram; Figure 10 For the present invention Figure 9 Enlarged schematic diagram of the structure at point F; Figure 11 This is a second cross-sectional schematic diagram of the mounting frame, fixing base, and mounting strip mating structure of the present invention; Figure 12 For the present invention Figure 11 Enlarged schematic diagram of the structure at point G in the diagram; Figure 13 For the present invention Figure 11 A magnified schematic diagram of the structure at point H.

[0020] In the diagram: 1. Processing table; 2. Sliding base; 3. Mounting bracket; 4. First arc groove; 5. Fixed base; 6. Second arc groove; 7. Vertical through hole; 8. Connecting sleeve; 9. Limiting ring; 10. Telescopic sleeve; 11. Strip groove; 12. Contact strip; 13. Sliding rod; 14. Connecting rod; 15. Rotating roller; 16. First spring; 17. Guide block; 18. Movable strip; 19. Connecting groove; 20. Movable block; 21. U-shaped frame; 22. Guide groove; 2201. Vertical section; 2202. Inclined section. 23. Inclined section; 24. Circular pin; 25. Pressure sensor; 26. Mounting strip; 27. First electric cylinder; 28. Sliding groove; 29. ​​Sliding block; 30. Smooth rod; 31. Second spring; 32. Arc-shaped buckle; 33. Fixed rod; 34. Sliding strip; 35. Movable rod; 36. Circular rod; 37. Wedge-shaped frame; 38. Lifting platform; 39. Drilling machine; 40. Second electric cylinder; 41. Connecting ring; 42. Transmission screw; 43. Servo motor; 44. Clamping pressure bar; 45. Arc-shaped pressure groove; 46. Third electric cylinder. Detailed Implementation

[0021] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0022] like Figures 1 to 13 The above describes a centering and drilling pin device for an automotive steering input shaft, which includes a processing table 1. The top two ends of the processing table 1 are slidably connected to a sliding base 2 and fixedly connected to a mounting bracket 3. The top of the sliding base 2 is provided with a first arc groove 4. The mounting bracket 3 is fixedly connected to a fixed base 5 inside. The top of the fixed base 5 is provided with a second arc groove 6. The fixed base 5 has a vertical through hole 7 (e.g. Figure 7 and Figure 9As shown), the vertical through hole 7 is connected to the second arc groove 6. A connecting sleeve 8 is provided inside the vertical through hole 7. A limiting ring 9 is fixedly connected to the top of the connecting sleeve 8. The limiting ring 9 is located inside the second arc groove 6. A telescopic sleeve 10 is slidably inserted inside the limiting ring 9. Multiple strip grooves 11 are opened circumferentially on the surface of the telescopic sleeve 10. All the strip grooves 11 are located above the limiting ring 9. Contact strips 12 are slidably connected inside the strip grooves 11. The distance between the axis of the telescopic sleeve 10 and the outer side of the contact strip 12 is the same as the radius of the limiting ring 9. Both the sliding base 2 and the fixed base 5 are equipped with clamping components. The processing table 1 is equipped with a drive displacement component, which is used to drive the sliding base 2 to slide. The telescopic sleeve 10 is equipped with a sliding clearance component. When the sliding base 2 moves towards the fixed base 5, the telescopic sleeve 10 slides downward along the inside of the limiting ring 9, and multiple contact strips 12 move into the telescopic sleeve 10 along the corresponding strip grooves 11. The processing table 1 is equipped with a drilling component, and the mounting bracket 3 is equipped with a pressing pin component.

[0023] The steering input shaft is placed inside the first arc groove 4, and then the steering column is placed inside the second arc groove 6. During the placement of the steering column, the telescopic sleeve 10 and the limiting ring 9 are passed through the limiting hole on one side of the steering column in sequence. The limiting ring 9 is located inside the corresponding limiting hole. The axis of the limiting hole is perpendicular to the axis of the second arc groove 6. Then, the steering input shaft and the steering column are clamped and positioned by the clamping assembly. After the steering input shaft is positioned, a vertical hole is drilled on the surface of one end of the steering input shaft protruding from the sliding base 2 using a drilling assembly. Then, the sliding base 2 and the steering input shaft are moved axially towards the fixed base 5 by a drive displacement assembly, so that the drilled end of the steering input shaft is axially inserted into the steering column. During the process of the steering input shaft entering the steering column, the telescopic sleeve 10 is moved downwards by a sliding clearance assembly to prevent it from obstructing the movement of the steering input shaft. Simultaneously, multiple contact strips 12 move along their corresponding grooves 11 into the telescopic sleeve 10, ensuring that the top end of the telescopic sleeve 10 can fully enter the limiting ring 9. After the drilled hole on the surface of the steering input shaft connects with the limiting hole on the surface of the steering column, the telescopic sleeve 10 moves upward and enters the drilled hole on the surface of the steering input shaft. At this time, multiple contact strips 12 move outward along the corresponding strip grooves 11 and return to the initial position. When the axis of the drilled hole on the surface of the input shaft is offset from the axis of the limiting hole on the surface of the steering column, one of the contact strips 12 will inevitably contact the inner wall of the drilled hole first and cannot move outward to the initial position, thus restricting the telescopic sleeve 10 from moving upward to the initial position. At this time, even if the pin is pressed, the pin will have difficulty passing smoothly along the connection between the drilled hole and the limiting hole, so the processed components need to be reworked and the processing equipment needs to be inspected. When multiple contact strips 12 enter the drilled hole on the surface of the input shaft and move completely to the initial position, the telescopic sleeve 10 moves upward to the initial position simultaneously, indicating that the drilled hole on the surface of the input shaft and the limiting hole on the surface of the steering column are in a centered and connected state. Finally, the pin is pressed by the pin pressing assembly, so that the pin passes smoothly along the connection between the drilled hole and the limiting hole and the pin pressing process is successfully completed. The present invention uses a limiting ring 9 and a telescopic sleeve 10 to limit the drilling holes on the surface of the input shaft and the limiting holes on the surface of the steering column, while also detecting the alignment of the drilling holes and the limiting holes, thereby ensuring the alignment of the insertion of the input shaft and the steering column and reducing the error rate of the pressing pin.

[0024] As a further embodiment of the present invention, the sliding clearance assembly includes a sliding rod 13, which is disposed inside the connecting sleeve 8. The bottom end of the telescopic sleeve 10 passes through the connecting sleeve 8 and extends into the connecting sleeve 8 before being fixedly connected to the top of the sliding rod 13. The bottom end of the sliding rod 13 passes through the connecting sleeve 8 and extends below the connecting sleeve 8 before being fixedly connected to a connecting rod 14. Both ends of the connecting rod 14 are rotatably connected to rotating rollers 15. A first spring 16 is sleeved on the sliding rod 13 and is fixedly connected between the telescopic sleeve 10 and the connecting sleeve 8. Two guide blocks 17 (e.g., ...) are fixedly connected to the side of the sliding base 2 near the fixed base 5. Figure 5As shown), guide slopes are provided on both sides of the guide block 17, and the two guide blocks 17 are respectively arranged opposite to the two rotating rollers 15; The telescopic sleeve 10 has multiple movable strips 18 slidably connected circumferentially inside, and multiple contact strips 12 are fixedly connected to the corresponding movable strips 18. Multiple connecting grooves 19 are formed circumferentially on the surface of the telescopic sleeve 10, and all connecting grooves 19 are located below the limiting ring 9. Movable blocks 20 are fixedly connected to each of the movable strips 18. Multiple U-shaped frames 21 are fixedly connected circumferentially inside the connecting sleeve 8, and guide grooves 22 are formed on both sides of each U-shaped frame 21 (e.g., ...). Figure 10 As shown), the guide groove 22 includes a vertical section 2201 and an inclined section 2202. The vertical section 2201 is located below the inclined section 2202. Multiple movable blocks 20 extend along the corresponding connecting grooves 19 to the interior of the corresponding U-shaped frame 21. A circular pin 23 is fixedly inserted on each movable block 20. The two ends of the circular pin 23 are located inside the corresponding inclined section 2202.

[0025] When the drive displacement assembly drives the sliding base 2 to move towards the fixed base 5, one end of the input shaft enters the interior of the steering column. Before the end of the input shaft contacts the telescopic shaft, the two guide blocks 17 contact the corresponding rotating rollers 15 respectively. The guide inclined surfaces on the guide blocks 17 guide the contact of the rotating rollers 15, causing the rotating rollers 15 to drive the connecting rod 14 to move downward to make room. The connecting rod 14 drives the sliding rod 13 to move downward synchronously with the telescopic sleeve 10, causing the telescopic sleeve 10 to slide downward along the interior of the limiting ring 9 to make room. This ensures that one end of the input shaft moves above the telescopic sleeve 10 and that the drill hole communicates with the limiting hole. When the telescopic sleeve 10 moves downward, it compresses the first spring 16 to produce compression deformation. As the telescopic sleeve 10 moves downward, multiple movable blocks 20 move along the interior of the corresponding U-shaped frame 21. The circular pins 23 on the movable blocks 20 are guided by the guide groove 22. When the circular pins 23 move inside the inclined section 2202, the movable blocks 20 move along the connecting groove 19 into the telescopic sleeve 10. A movable strip 18 is fixedly connected between the movable blocks 20 and the contact strips 12, so that when the movable blocks 20 move, the contact strips 12 move synchronously into the telescopic sleeve 10 along the strip groove 11. When the circular pins 23 move to the junction of the vertical section 2201 and the inclined section 2202, the outer side of the contact strips 12 adheres to the surface of the telescopic sleeve 10, causing multiple contact strips 12 to synchronously enter the interior of the limiting ring 9 and move to make way. Furthermore, as the telescopic sleeve 10 continues to move downward, the circular pins 23 move along the connecting groove 19 into the telescopic sleeve 10. As the vertical section 2201 continues to move inside, the limiting effect of the vertical section 2201 on the circular pin 23 ensures that the outer sides of the multiple contact strips 12 are always in contact with the surface of the telescopic sleeve 10. When the drill hole on the input shaft and the limiting hole on the steering column are connected, the guide block 17 moves away from the top of the rotating roller 15. After the rotating roller 15 loses the squeezing and limiting effect of the guide block 17, the compressed first spring 16 moves upward through the elastic reset effect, and drives the telescopic sleeve 10 to move upward. The multiple contact strips 12 move outward synchronously, so that the telescopic sleeve 10 enters the drill hole of the input shaft, and the multiple contact strips 12 move outward and contact the inner wall of the drill hole. When the drill hole on the surface of the input shaft and the limiting hole on the surface of the steering column are in a centered and connected state, the multiple contact strips 12 are in contact with the inner wall of the drill hole, and the telescopic sleeve 10 moves upward to the initial position.

[0026] As a further embodiment of the present invention, a pressure sensor 24 is fixedly installed on the connecting rod 14, and the pressure sensor 24 is in contact with the bottom of the connecting sleeve 8.

[0027] When the first spring 16 is in an elastically extended state, the pressure sensor 24 contacts the bottom of the connecting sleeve 8 and generates a fixed contact pressure. When the sliding base 2 moves towards the fixed base 5, the telescopic sleeve 10 and the connecting rod 14 move downward and drive the pressure sensor 24 away from the connecting sleeve 8. When the drill hole on the input shaft surface is connected to the limiting hole on the steering column surface, the telescopic sleeve 10 moves upward and enters the drill hole on the input shaft surface. When the drill hole on the input shaft surface and the limiting hole on the steering column surface are aligned, the telescopic sleeve 10 returns to the initial position and the pressure sensor 24 contacts the connecting sleeve 8 again. After the pressure sensor 24 detects pressure again, the controller connected to the pressure sensor 24 controls the pin pressing assembly to press the pin. When the axis of the drill hole on the input shaft surface and the axis of the limiting hole on the steering column surface are offset, the multiple contact bars 12 cannot move outward to the initial position, making it impossible for the telescopic sleeve 10 to return upward to the initial position. The pressure sensor 24 loses contact pressure, thereby restricting the pin pressing assembly from performing the pin pressing operation.

[0028] As a further embodiment of the present invention, the pressing pin assembly includes a mounting strip 25, which is slidably connected inside the mounting frame 3 and located above the second arcuate groove 6. A first electric cylinder 26 is fixedly mounted on the top of the mounting frame 3, and the drive shaft of the first electric cylinder 26 is fixedly connected to the top of the mounting strip 25. Two sliding grooves 27 are opened at the bottom of the mounting strip 25. A slider 28 is slidably connected inside each of the two sliding grooves 27. A smooth rod 29 is slidably inserted on each slider 28. The two smooth rods 29 are respectively fixedly connected inside the corresponding sliding grooves 27. A second spring 30 is sleeved on each smooth rod 29. The second spring 30 is fixedly connected between the corresponding slider 28 and the sliding groove 27. An arcuate buckle 31 is fixedly connected to the bottom of each of the two sliders 28. A guide slope is opened at the bottom of each of the two arcuate buckles 31. A pressing pin clearance assembly is provided on the arcuate buckle 31.

[0029] The pin's limiting end is moved upwards from below between the two arc-shaped latches 31, causing the pin to contact and press against the guide slope of the arc-shaped latches 31. The two arc-shaped latches 31 move away from each other and make room, causing the two sliders 28 to move away from each other along the corresponding sliding grooves 27, and compressing the second spring 30 on the smooth rod 29. When the pin's limiting end moves between the slots of the two arc-shaped latches 31, the compressed second spring 30 stretches through elastic reset, pressing the two sliders 28 back to their initial positions and causing the two arc-shaped latches 31 to move closer to each other, thus elastically limiting the pin. After the pressure sensor 24 detects the pressure again, the controller connected to the pressure sensor 24 controls the transmission shaft of the first electric cylinder 26 to move downwards, and drives the mounting strip 25 and the pin to move downwards synchronously. After the pin passes through the limiting hole at the top of the steering column, it moves into the drill hole of the input shaft and finally passes out from the limiting hole at the bottom of the steering column, completing the pin limiting of the input shaft and the steering column.

[0030] As a further embodiment of the present invention, a fixing rod 32 is fixedly connected to the connecting sleeve 8. The fixing rod 32 is located at the bottom of the fixing base 5. Sliding strips 33 are fixedly connected to both sides of the fixing rod 32. The two sliding strips 33 extend through the fixing base 5 to the top of the fixing base 5 and are then fixedly connected to the mounting strip 25.

[0031] When the drive shaft of the first electric cylinder 26 drives the mounting strip 25 and the pin to move downward, the two sliding strips 33 move downward synchronously along the through-hole of the fixed base 5, thereby driving the fixed rod 32 and the connecting sleeve 8 to move downward. The connecting sleeve 8 drives the limiting ring 9 to move downward and move downward from the limiting hole at the bottom of the steering column to make room, preventing the limiting ring 9 from blocking the pressure pin when it is located in the limiting hole.

[0032] As a further embodiment of the present invention, the push pin clearance assembly includes two movable rods 34, which are respectively fixedly connected to two arc-shaped buckles 31. A circular rod 35 is fixedly inserted at the adjacent and far ends of the two movable rods 34. Two wedge-shaped frames 36 are fixedly connected to the top of the fixed base 5, and the two wedge-shaped frames 36 are respectively located below the two circular rods 35.

[0033] When the mounting bar 25 and the pin move downwards, the two movable rods 34 move downwards synchronously. When the pin passes through the limiting hole at the top of the steering column and moves into the borehole of the input shaft, the movable rod 34 enters the interior of the corresponding wedge frame 36, and the circular rod 35 contacts and presses against the inclined surface of the wedge frame 36, thereby causing the two arc-shaped buckles 31 to move away from each other and automatically release the limiting of the pin.

[0034] As a further embodiment of the present invention, the drilling assembly includes a lifting platform 37, a drilling machine 38 is slidably connected inside the lifting platform 37, a second electric cylinder 39 is fixedly installed on the top of the lifting platform 37, and the drive shaft of the second electric cylinder 39 is fixedly connected to the drilling machine 38.

[0035] The transmission shaft of the second electric cylinder 39 moves downward and drives the drilling machine 38 to move downward. The rotating head at the bottom of the drilling machine 38 rotates at high speed and contacts the steering gear input shaft downward, thereby drilling a vertical hole in the steering gear input shaft.

[0036] As a further embodiment of the present invention, the drive displacement assembly includes a connecting ring 40, which is fixedly connected to one side of the sliding base 2. A transmission screw 41 is rotatably connected to the processing table 1, and the connecting ring 40 is threadedly connected to the transmission screw 41. A servo motor 42 is fixedly installed on the processing table 1, and the output shaft of the servo motor 42 is fixedly connected to one end of the transmission screw 41.

[0037] The output shaft of the servo motor 42 rotates, causing the transmission screw 41 to rotate synchronously. Through the threaded connection between the transmission screw 41 and the connecting ring 40, the sliding base 2 is displaced unidirectionally along the sliding connection. When the output shaft of the servo motor 42 rotates in the opposite direction, the sliding base 2 moves in the opposite direction.

[0038] As a further embodiment of the present invention, the clamping assembly has two sets of clamping pressure bars 43, which are slidably connected to the top of the sliding base 2 and the fixed base 5 respectively. Each set of clamping pressure bars 43 has two bars, and the bottom of the adjacent side of the two clamping pressure bars 43 in the same set is provided with an arc-shaped pressure groove 44. Two third electric cylinders 45 are fixedly installed on the top of the sliding base 2 and the fixed base 5, and the drive shaft of the third electric cylinder 45 is fixedly connected to the corresponding clamping pressure bar 43.

[0039] The transmission shaft of the third electric cylinder 45 moves, causing the two clamping pressure bars 43 in the same group to move closer to each other, thereby clamping and limiting the steering input shaft and steering column. The surfaces of the steering input shaft and steering column are limited and fitted with the corresponding arc-shaped pressure grooves 44.

[0040] As a further embodiment of the present invention, the top of the sliding base 2 is an arc-shaped stepped structure, and the clamping strip 43 at the top of the sliding base 2 matches the top contour of the sliding base 2.

[0041] The steering input shaft is usually eccentric in shape. Therefore, when the steering input shaft is limited, the arc-shaped stepped structure at the top of the sliding base 2 is the same as the eccentric profile of the steering input shaft. While limiting the steering input shaft, the passive rotation generated during the drilling process of the steering input shaft is also restricted, thus improving the drilling accuracy.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A device for centering and drilling pins for automotive steering gear input shafts, comprising a processing table, characterized in that, The top of the processing table is slidably connected to two sliding bases and fixedly connected to mounting brackets. The top of the sliding base is provided with a first arc groove, and the mounting bracket is fixedly connected to a fixed base. The top of the fixed base is provided with a second arc groove. A vertical through hole is provided on the fixed base, which is connected to the second arc groove. A connecting sleeve is provided inside the vertical through hole. A limit ring is fixedly connected to the top of the connecting sleeve. The limit ring is located inside the second arc groove. A telescopic sleeve is slidably inserted inside the limit ring. Multiple strip grooves are provided on the surface of the telescopic sleeve along the circumference. All of the strip grooves are located above the limit ring. Contact strips are slidably connected inside the strip grooves. The distance between the axis of the telescopic sleeve and the outer side of the contact strip is the same as the radius of the limit ring. Both the sliding base and the fixed base are equipped with clamping components. A drive displacement component is provided on the processing table. The drive displacement component is used to drive the sliding base to slide. A sliding clearance component is provided on the telescopic sleeve. When the sliding base moves towards the fixed base, the telescopic sleeve slides downward along the inside of the limiting ring, and multiple contact strips move into the telescopic sleeve along the corresponding strip grooves. A drilling component is provided on the processing table, and a pressure pin component is provided on the mounting bracket.

2. The automotive steering gear input shaft centering drilling and pressing pin device according to claim 1, characterized in that, The sliding clearance assembly includes a sliding rod, which is located inside the connecting sleeve. The bottom end of the telescopic sleeve passes through the connecting sleeve and extends into the connecting sleeve before being fixedly connected to the top of the sliding rod. The bottom end of the sliding rod passes through the connecting sleeve and extends below the connecting sleeve before being fixedly connected to a connecting rod. Rotating rollers are rotatably connected to both ends of the connecting rod. A first spring is sleeved on the sliding rod and is fixedly connected between the telescopic sleeve and the connecting sleeve. Two guide blocks are fixedly connected to the side of the sliding base near the fixed base. Guide slopes are provided on both sides of the guide blocks, and the two guide blocks are respectively arranged opposite to the two rotating rollers. The telescopic sleeve has multiple movable strips slidably connected circumferentially inside, and the interior of multiple contact strips is fixedly connected to the corresponding movable strips. The surface of the telescopic sleeve has multiple connecting grooves circumferentially, and the multiple connecting grooves are all located below the limiting ring. Movable blocks are fixedly connected to the multiple movable strips. The connecting sleeve has multiple U-shaped frames fixedly connected circumferentially inside, and guide grooves are opened on both sides of the U-shaped frames. The guide grooves include vertical sections and inclined sections. The vertical sections are located below the inclined sections. Multiple movable blocks extend along the corresponding connecting grooves into the interior of the corresponding U-shaped frames. Circular pins are fixedly inserted into the movable blocks, and the two ends of the circular pins are located inside the corresponding inclined sections.

3. The automotive steering gear input shaft centering drilling and pressing pin device according to claim 2, characterized in that, A pressure sensor is fixedly installed on the connecting rod, and the pressure sensor is in contact with the bottom of the connecting sleeve.

4. The automotive steering gear input shaft centering drilling and pressing pin device according to claim 3, characterized in that, The pressure pin assembly includes a mounting strip, which is slidably connected inside the mounting frame and located above the second arc-shaped groove. A first electric cylinder is fixedly mounted on the top of the mounting frame, and the drive shaft of the first electric cylinder is fixedly connected to the top of the mounting strip. Two sliding grooves are opened at the bottom of the mounting strip, and sliders are slidably connected inside the two sliding grooves. A smooth rod is slidably inserted on each slider, and the two smooth rods are fixedly connected inside the corresponding sliding grooves. A second spring is sleeved on each smooth rod, and the second spring is fixedly connected between the corresponding slider and the sliding groove. Arc-shaped buckles are fixedly connected to the bottom of the two sliders, and guide slopes are opened at the bottom of the two arc-shaped buckles. Pressure pin clearance components are provided on the arc-shaped buckles.

5. The automotive steering gear input shaft centering drilling and pressing pin device according to claim 4, characterized in that, A fixing rod is fixedly connected to the connecting sleeve. The fixing rod is located at the bottom of the fixing base. Sliding strips are fixedly connected to both sides of the fixing rod. Both sliding strips pass through the fixing base and extend to the top of the fixing base before being fixedly connected to the mounting strip.

6. The automotive steering gear input shaft centering drilling and pressing pin device according to claim 4, characterized in that, The push pin clearance assembly includes two movable rods, which are fixedly connected to two arc-shaped buckles. A circular rod is fixedly inserted at the far end of each of the two movable rods. Two wedge-shaped frames are fixedly connected to the top of the fixed base, and the two wedge frames are located below the two circular rods.

7. The automotive steering gear input shaft centering drilling and pressing pin device according to claim 1, characterized in that, The drilling assembly includes a lifting platform, a drilling machine is slidably connected inside the lifting platform, a second electric cylinder is fixedly installed on the top of the lifting platform, and the drive shaft of the second electric cylinder is fixedly connected to the drilling machine.

8. The automotive steering gear input shaft centering drilling and pressing pin device according to claim 1, characterized in that, The drive displacement assembly includes a connecting ring, which is fixedly connected to one side of the sliding base. A transmission screw is rotatably connected to the machining table, and the connecting ring is threaded onto the transmission screw. A servo motor is fixedly mounted on the machining table, and the output shaft of the servo motor is fixedly connected to one end of the transmission screw.

9. The automotive steering gear input shaft centering drilling and pressing pin device according to claim 1, characterized in that, The clamping assembly has two sets of clamping bars, which are slidably connected to the top of the sliding base and the fixed base, respectively. Each set of clamping bars consists of two bars, and the bottom of the adjacent side of the two clamping bars in the same set is provided with an arc-shaped pressure groove. Two third electric cylinders are fixedly installed on the top of the sliding base and the fixed base, and the drive shaft of the third electric cylinder is fixedly connected to the corresponding clamping bar.

10. The automotive steering gear input shaft centering drilling and pressing pin device according to claim 9, characterized in that, The top of the sliding base has an arc-shaped stepped structure, and the clamping strip on the top of the sliding base matches the top contour of the sliding base.

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