Air distribution control spindle bearing cap hollow pin assembly equipment

Abstract

The application discloses a kind of air distribution control main shaft bearing cover hollow pin assembly equipment, including pedestal, which is provided with shaft cover clamp and support frame, support frame is equipped with first lower pressing component and second lower pressing component;The lower pressing part of first lower pressing component is installed with centering device, the hollow pin clamping mechanism is connected to centering device, which is located above the shaft cover clamp, and the annular hollow pin clamping sleeve cavity is arranged on the hollow pin clamping mechanism;The lower pressing part of second lower pressing component is located directly above the lower pressing part of first lower pressing component.The remarkable effect of the present application is that the hollow pin is arranged in the annular hollow pin clamping sleeve cavity, and the centering can be adjusted adaptively according to the position of the pin hole, so that the center lines of the two coincide, and the two-stage lower pressing device is combined to complete the alignment and pressing of the hollow pin, complete the assembly of the hollow pin, so as to avoid damage to the hollow pin and ensure the concentric assembly of the hollow pin and the pin hole.

Description

Technical Field

[0001] This invention relates to the field of machinery, and more specifically to a device for assembling a hollow pin in a pin hole of a shaft cover. Background Technology

[0002] The camshaft of an automobile, also known as the valve train control spindle, is mounted inside the cylinder head via a camshaft cover / bearing cover. A locating pin is provided between the camshaft cover / bearing cover and the cylinder head to facilitate quick installation. Traditionally, the locating pin is a solid locating pin, which is pre-installed in the pin hole of the camshaft cover / bearing cover using a pin-pressing device.

[0003] Because the locating pin only serves a guiding and positioning function and bears almost no force itself, some OEMs, aiming to save costs, have replaced solid locating pins with hollow ones, which has led to new assembly problems: 1. The existing pin clamping equipment clamps / grips / grabs (hereinafter referred to as: clamping) the positioning pins by clamping from the outside to the inside. This clamping component is suitable for solid positioning pins, but when it is used to clamp / grip hollow pins, the hollow pin is subjected to unidirectional force on the outside, and is easily damaged during clamping and pressing. 2. In existing pin-pressing equipment, after clamping the locating pin, the pin can only be pressed axially downwards, and there may be a slight eccentricity between the locating pin and the pin hole on the camshaft cover. Solid locating pins, due to their sufficient strength, can align with the pin hole even with slight eccentricity by pushing the clamping component slightly backwards during the pressing process, forcing the solid pin into the hole with minimal damage or deformation, and maintaining good concentricity between the solid pin and the pin hole. However, when replaced with hollow pins, due to their lower strength, slight eccentricity can lead to breakage and deformation during pressing because they cannot be aligned with the pin hole.

[0004] 3. Existing pin pressing equipment has a clamping component connected to a pressing device. After the positioning pin is clamped, the pressing device pushes down in one step to press the positioning pin into the pin hole. However, the pressing rate and pressing force of the same pressing device are difficult to adjust, making it difficult to apply to pin pressing scenarios that require different pressing forces. Summary of the Invention

[0005] To solve the above technical problems, this invention provides a device suitable for assembling hollow pins on camshaft caps. The main technical solution adopted is as follows: A hollow pin assembly device for a valve control spindle bearing cover, the key feature of which is: a base, on which a bearing cover clamp and a support frame are provided, and a first pressing component and a second pressing component are arranged on the support frame; The first pressing component is equipped with a centering device on its pressing part. The centering device is connected to a hollow pin clamping mechanism. The hollow pin clamping mechanism is located above the shaft cover clamp. The hollow pin clamping mechanism is equipped with an annular hollow pin sleeve cavity, which is closed at one end and open at the other end. The pressing part of the second pressing component is located directly above the pressing part of the first pressing component.

[0006] The above technical solution utilizes an annular hollow pin clamping cavity on the hollow pin clamping mechanism to hold and clamp the hollow pin. Both the inner and outer sides of the hollow pin are constrained / supported, preventing breakage due to unilateral force during clamping and pressing. An alignment device adjusts the hollow pin clamping mechanism to ensure the hollow pin aligns with the pin hole, guaranteeing concentricity and preventing breakage or deformation during pressing. A first pressing component and a second pressing component work together. The first pressing component is configured to press down slowly with a smaller force, allowing the hollow pin to adjust with the alignment device upon contact with the pin hole, preventing damage. The second pressing component is configured to press down quickly with a larger force, pressing the hollow pin into the pin hole. This technical solution prevents damage to the hollow pin and ensures concentric assembly of the hollow pin and pin hole. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the camshaft cover structure; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 A structural schematic diagram of the front view of the upright plate 51; Figure 4 A structural schematic diagram of the back view of the upright plate 51; Figure 5 This is a schematic diagram showing the connection relationship between slider 14, centering device 2, and hollow pin clamping mechanism 6. Figure 6 This is a schematic diagram of the structure of the shaft cover fixture 3; Figure 7 This is a cross-sectional structural diagram of the centering device 2 and the hollow pin clamping mechanism 6; Figure 8 This is a cross-sectional structural diagram of the centering device 2; Figure 9 This is a schematic diagram of the structure of the centering floating seat 22 facing away from the centering connection part 23; Figure 10 This is a structural schematic diagram of the centering floating seat 22 facing the centering connection part 23; Figure 11 This is a cross-sectional schematic diagram of the hollow pin clamping mechanism 6; Figure 12 This is a schematic diagram of the hollow pin internal constraint rod 63. Detailed Implementation

[0008] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0009] A device for assembling hollow pins for valve train control spindle bearing caps, such as Figures 1-12 As shown, it includes a base A, on which a shaft cover clamp 3 and a support frame 5 are provided. The support frame 5 is equipped with a first pressing component 1 and a second pressing component 4. The pedestal A includes a pedestal support and a table surface fixed on the pedestal support. The table surface is rectangular and is also provided with a three-sided protective net. The protective net is vertically arranged and the three sides of the protective net are erected on the three side strips of the table surface. The shaft cover clamp 3, the support frame 5, the first pressing component 1 and the second pressing component 4 are all located in the internal area of ​​the three-sided protective net.

[0010] The first pressing component 1 is equipped with a centering device 2 on its pressing part. The centering device 2 is connected to a hollow pin clamping mechanism 6. The hollow pin clamping mechanism 6 is located above the shaft cover clamp 3. The hollow pin clamping mechanism 6 is equipped with an annular hollow pin sleeve cavity. One end of the hollow pin sleeve cavity is closed and the other end is open. The pressing part of the second pressing component 4 is located directly above the pressing part of the first pressing component 1.

[0011] Specifically: The shaft cover clamp 3 includes a clamp base 31, which is fixed on the base A. Two support platforms 32 are fixed on the clamp base 31, and each of the two support platforms 32 is provided with an anti-misalignment slot. The clamp base 31 is also provided with two positioning posts 33, which are arranged facing upwards. The shaft cover clamp 3 also includes a clamping member 34, the pressing part of which faces between the two support platforms 32. The clamping member 34 is selected from quick clamps and clamping blocks fixed on the clamping parts of the quick clamps. There are various existing technologies available for the quick clamp structure.

[0012] The support frame 5 includes an upright plate 51 and a top plate 52. The upright plate 51 is vertically arranged, and its lower edge is fixedly connected to the pedestal A. The upper edge of the upright plate 51 is fixedly connected to the top plate 52. The first pressing component 1 is disposed on the upright plate 51, and the second pressing component 4 is disposed on the top plate 52. The middle part of the upright plate 51 is provided with a first pressing component return sensor, and the upper part of the upright plate 51 is provided with a second pressing component return sensor. The return sensor can be a proximity switch.

[0013] The first pressing component 1 includes a lifting cylinder 12, a linear slide rail 13, a slider 14, and a floating seat mounting plate 15. The linear slide rail 13 is vertically arranged on the upright plate 51, and the slider 14 is slidably mounted on the linear slide rail 13. The lifting cylinder 12 and the linear slide rail 13 are located on both sides of the upright plate 51. The cylinder of the lifting cylinder 12 is fixed to the upright plate 51. The piston rod of the lifting cylinder 12 is parallel to the linear slide rail 13. The piston rod of the lifting cylinder 12 is connected to the slider 14 through a synchronizing block. The upright plate 51 is provided with a vertical strip hole for the synchronizing block to move up and down. The floating seat mounting plate 15 is fixedly installed on the slider 14. The floating seat mounting plate 15 is horizontally arranged. The centering device 2 is connected to the lower surface of the floating seat mounting plate 15.

[0014] A specific implementation of the centering device 2 is as follows: The centering device 2 includes a centering base 21 and a centering floating seat 22 disposed on the centering base 21. The centering base 21 is connected to the pressing part of the first pressing assembly 1 (specifically, to the floating seat mounting plate 15).

[0015] Specifically, the centering base 21 includes two constraint plates 211 that are vertically aligned and horizontally arranged. The two constraint plates 211 are kept relatively fixed, and a swing chamber is formed between the two constraint plates 211. The centering floating seat 22 is arranged in the swing chamber. The centering floating seat 22 is simultaneously constrained by the two constraint plates 211 and moves in a plane parallel to the constraint plates 211. The constraint plate 211 located below is provided with an extended through hole 21a. The extended through hole 21a is provided with a centering connection part 23 that is clearance-fitted with it. The centering connection part 23 is fixedly connected to the centering floating seat 22. The centering connection part 23 is preferably a cylinder. The center line of the centering connection part 23 coincides with the center line of the extended through hole 21a.

[0016] The centering floating seat 22 includes a cage and two sets of ball bearings arranged on the cage, one set of the ball bearings making rolling contact with one of the constraint plates 211, and the other set of the ball bearings making rolling contact with the other constraint plate 211.

[0017] The same set of ball bearings includes at least three balls 222 to maintain stability. All the balls 222 are respectively rolled and embedded in the cage. All the balls 222 in the same set are evenly distributed circumferentially on the cage. All the balls 222 in the same set simultaneously roll and contact the corresponding constraint plate 211. The centering connection part 23 is fixedly connected to the cage.

[0018] The cage includes two stacked retaining plates 221. Each retaining plate 221 has a ball hole corresponding to each ball 222, and the wall of the ball hole matches the outer wall of the ball 222. The two retaining plates 221 are clamped and stacked from both sides of the ball 222. Part of the ball 222 protrudes from the ball hole and rolls in contact with the corresponding constraint plate 211. Specifically, all the balls 222 of one set of balls protrude from the ball hole on one retaining plate 221 and roll in contact with the corresponding constraint plate 211; all the balls 222 of the other set of balls protrude from the ball hole on the other retaining plate 221 and roll in contact with the corresponding constraint plate 211. The two retaining plates 221 are welded together for fixation. This cage structure has high stability and is simple to assemble.

[0019] The centering device 2 further includes a circumferential reset device 24, which is arranged around the centering floating seat 22. The circumferential reset device 24 is configured to store energy by the rolling compression of the centering floating seat 22, and after storing energy, the circumferential reset device 24 has a tendency to push the centering floating seat 22 to reset.

[0020] A specific embodiment of a circumferential reset device 24 is as follows: The circumferential reset device 24 includes an abutment ring 241 and a plurality of elastic elements 242. The abutment ring 241 is arranged around the centering floating seat 22. One end face of the abutment ring 241 can be fixedly connected to any of the constraint plates 211 for assembly purposes. The other constraint plate 211 is bolted to the other end face of the abutment ring 241. An adjustment gap is provided between the abutment ring 241 and the centering floating seat 22. The size of the adjustment gap can be set according to actual needs. The plurality of elastic elements 242 are evenly distributed circumferentially on the abutment ring 241. The elastic elements 242 extend inward and contact and abut against the centering floating seat 22. The plurality of elastic elements 242 act on the centering floating seat 22 from different directions, improving the reset performance of the centering floating seat 22.

[0021] To facilitate the installation of the elastic element 242, radial positioning holes are provided on the abutment ring 241. Each positioning hole corresponds to one of the elastic elements 242. One end of each elastic element 242 is inserted into its corresponding positioning hole, and the other end of the elastic element 242 radially abuts against the retainer. The elastic element 242 can be a spring or a spring plunger.

[0022] To facilitate adjustment of the initial position of the centering floating seat 22, an adjusting stud 25 is also fitted inside the positioning hole of the elastic element. The adjusting stud 25 is threaded into the positioning hole of the elastic element and is located on the outside of the elastic element 242. The outer end of the elastic element 242 contacts the adjusting stud 25. By rotating the adjusting stud 25 forward and backward, the magnitude of the force exerted by the elastic element 242 on the centering floating seat 22 can be controlled, thereby adjusting the initial position of the centering floating seat 22. The centering connecting part 23 is connected to the hollow pin clamping mechanism 6.

[0023] A specific embodiment of a hollow pin clamping mechanism 6 is as follows: the hollow pin clamping mechanism 6 includes a holding mounting base 61, a hollow pin outer constraint base 62, and a hollow pin inner constraint rod 63. The holding mounting base 61 is fixedly connected to the centering connection part 23. One end of the hollow pin inner constraint rod 63 is fixedly connected to the holding mounting base 61. The hollow pin outer constraint base 62 is provided with a hollow pin constraint hole 62a, and the hollow pin inner constraint rod 63 is disposed in the hollow pin constraint hole 62a. The holding mounting base 61 serves as a transfer mechanism. The holding mounting base 61 includes a transfer base plate. The two sides of the transfer base plate are respectively provided with a first connecting sleeve and a second connecting sleeve. The center lines of the first connecting sleeve and the second connecting sleeve coincide. The centering connecting part 23 is interference-fitted into the first connecting sleeve. The end face of the centering connecting part 23 is provided with a fastening screw hole. The second connecting sleeve is provided with a fastening bolt. The fastening bolt passes through the transfer base plate and extends into the fastening screw hole and is threadedly connected to it. One end of the hollow pin inner constraint rod 63 is interference-fitted into the second connecting sleeve. The hollow pin inner constraint rod 63 and the second connecting sleeve are provided with radial fixing rods. The hollow pin inner restraint rod 63 includes an axial abutment section 631 and a pin sleeve inner section 632. The inner wall of the hollow pin restraint hole 62a abuts against the axial abutment section 631. The diameter of the pin sleeve inner section 632 is smaller than the diameter of the hollow pin restraint hole 62a. The pin sleeve inner section 632 and the hollow pin restraint hole 62a are concentrically arranged. A hollow pin sleeve cavity is formed between the outer wall of the pin sleeve inner section 632 and the inner wall of the hollow pin restraint hole 62a. The hollow pin sleeve cavity is used to place the hollow pin. The inner wall of the hollow pin restraint hole 62a abuts against the axial abutment section 631 so that one end of the hollow pin sleeve cavity is closed and the other end is open. The concentric arrangement of the pin sleeve inner section 632 and the hollow pin restraint hole 62a ensures uniform force distribution on the hollow pin. The hollow pin is placed in the hollow pin sleeve cavity. By controlling the size, the thickness of the hollow pin sleeve cavity is equal to or slightly greater than the wall thickness of the hollow pin. This can basically hold the hollow pin stably. During the process of holding the hollow pin and pressing the hollow pin into the pin hole, both the inner and outer sides of the hollow pin are constrained / supported, and the hollow pin is not easily deformed or damaged by compression. The diameter of the inner section 632 of the pin cylinder is preferably 10-30 μm smaller than the inner diameter of the hollow pin, and the diameter of the hollow pin constraint hole 62a is preferably 10-30 μm larger than the outer diameter of the hollow pin. In order to improve the stability of the hollow pin under gripping, an annular rubber ring groove is provided on the inner section 632 of the pin cylinder. The annular rubber ring groove is close to the axial abutment section 631. A retaining rubber ring is fitted inside the annular rubber ring groove. The wall thickness of the retaining rubber ring is greater than the depth of the annular rubber ring groove. A part of the retaining rubber ring extends out of the groove opening of the annular rubber ring groove so that it can be deformed by the pressure of the inner wall of the hollow pin, so that the inner wall of the hollow pin is subjected to force and is gripped.

[0024] To ensure the hollow pin maintains internal constraint / support even when pressed into the pin hole to a greater depth, the hollow pin internal constraint rod 63 further includes a sliding assembly section 633. The sliding assembly section 633 is axially slidably assembled with the hollow pin constraint hole 62a, and is integrally connected with the pin cylinder inner section 632. The sliding assembly section 633 and the pin cylinder inner section 632 are located on opposite sides of the axial abutment section 631. With this structure, the hollow pin internal constraint rod 63 can be pressed into the pin hole along with the hollow pin. During the pressing process, the hollow pin internal constraint rod 63 continuously provides internal constraint / support to the hollow pin, preventing the hollow pin from being deformed by compression.

[0025] The end of the pin sleeve insert 632, away from the axial abutment section 631, extends out of the hollow pin constraint hole 62a to form a guide portion. The protruding end of the pin sleeve insert 632 is chamfered. When the hollow pin axially approaches the pin hole of the target product, the protruding end of the pin sleeve insert 632 first approaches the pin hole and gradually inserts into the pin hole under the guidance of its chamfered end. The hollow pin then approaches and inserts into the pin hole. During this process, if the hollow pin and the pin hole are misaligned, or if the pin sleeve insert 632 and the pin hole are misaligned, the pin sleeve insert 632 and / or the hollow pin will be radially stressed as they gradually approach and contact the pin hole, causing the centering floating seat 22 to roll / oscillate, ultimately allowing the hollow pin to adaptively adjust and align relative to the pin hole.

[0026] To ensure the hollow pin stops when pressed to the designed depth, a limiting groove 63a is provided along the axial direction on the outer wall of the sliding assembly section 633. The two ends of the limiting groove 63a are closed. A sliding limiting block 621 is provided on the hollow pin outer constraint seat 62, and the sliding limiting block 621 extends into the limiting groove 63a. A specific embodiment of the sliding limiting block 621 is as follows: a limiting bolt is assembled on the hollow pin outer constraint seat 62, and the end of the limiting bolt extends into the limiting groove 63a to form the sliding limiting block 621.

[0027] In this embodiment, when the inner section 632 of the pin cylinder is retracted to the maximum extent into the hollow pin constraint hole 62a, the hollow pin constraint rod 63 is in the initial position; when the inner section 632 of the pin cylinder extends to the maximum extent out of the hollow pin constraint hole 62a, the hollow pin constraint rod 63 is in the end position. When the hollow pin inner constraint rod 63 slides from the initial position to the end position, it corresponds to the pressing process of the hollow pin. When the hollow pin inner constraint rod 63 slides from the end position to the initial position, a reset mechanism can provide a restoring force. Specifically, the sliding assembly section 633 extends out of the hollow pin constraint hole 62a and is fixedly connected to the holding mounting seat 61. A constraint seat return spring 64 is fitted on the protruding part of the sliding assembly section 633. The two ends of the constraint seat return spring 64 abut against the holding mounting seat 61 and the hollow pin outer constraint seat 62, respectively.

[0028] A specific embodiment of the second pressing assembly 4 is as follows: The second pressing assembly 4 includes a pressing cylinder 42 and a guide rod 43. The guide rod 43 is vertically movably mounted on the top plate 52. The cylinder barrel of the pressing cylinder 42 is fixed on the top plate 52. The piston rod of the pressing cylinder 42 passes downward through the top plate 52 and connects to the guide rod 43. A pressing head 44 is provided at the lower end of the piston rod of the pressing cylinder 42. A hydraulic station is also configured to pump hydraulic oil into the pressing cylinder 42 in conjunction with the pressing cylinder 42.

[0029] A buffer 9 is also arranged on the pressing path of the pressing part of the first pressing assembly 1. When the pressing part of the first pressing assembly 1 presses down, it contacts the buffer 9 and decelerates. Specifically, the buffer 9 is provided on the vertical plate 11 below the slider 14. The buffer 9 is preferably a damper to prevent the hollow pin from rapidly impacting the pin hole of the target product.

[0030] A pressure sensor 8 is fixed to the upper surface of the floating seat mounting plate 15, and the pressure sensor 8 faces the pressing head 44 of the second pressing component 4. The pressure sensor 8 is used to monitor the magnitude of the force exerted by the second pressing component 4 on the first pressing component 1, so as to determine whether the pressing is in place. The pressing part of the first pressing component 1 is also equipped with an upper stop head 71. Specifically, the upper stop head 71 is fixedly connected to the lower surface of the floating seat mounting plate 15 and is set downward. A lower stop head 72 is also provided on the clamp base 31 and is set upward. The lower stop head 72 corresponds to the upper stop head 71. The second pressing component 4 is forcibly stopped when the upper and lower stop heads 71 ​​and 72 come into contact.

[0031] Beneficial effects: In the scheme of this invention, the hollow pin is configured in the annular hollow pin sleeve cavity, and both the inner and outer sides of the hollow pin are constrained / supported. After the hollow pin is clamped, it can be adaptively adjusted and aligned according to the position of the pin hole, so that the center lines of the two coincide. Combined with the two-stage pressing device, the hollow pin is first slowly pressed down with a smaller downward pressure to make it contact and align with the pin hole, and then the hollow pin is pressed down quickly with a larger downward pressure to press the hollow pin into the pin hole, thus completing the hollow pin assembly. This can avoid damage to the hollow pin and ensure that the hollow pin and the pin hole are concentrically assembled.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. Those skilled in the art, under the guidance of the present invention, can make various similar representations without departing from the spirit and claims of the present invention, and such modifications all fall within the protection scope of the present invention.

Claims

1. A device for assembling hollow pins for a valve train control spindle bearing cover, characterized in that: Includes a base (A), on which a shaft cover clamp (3) and a support frame (5) are provided, and a first pressing component (1) and a second pressing component (4) are arranged on the support frame (5); The first pressing component (1) is equipped with a centering device (2) on its pressing part. The centering device (2) is connected to a hollow pin clamping mechanism (6). The hollow pin clamping mechanism (6) is located above the shaft cover clamp (3). The hollow pin clamping mechanism (6) is equipped with an annular hollow pin sleeve cavity. One end of the hollow pin sleeve cavity is closed and the other end is open. The pressing part of the second pressing component (4) is located directly above the pressing part of the first pressing component (1).

2. The air distribution control spindle bearing cover hollow pin assembly equipment according to claim 1, characterized in that: The shaft cover clamp (3) includes a clamp base (31), which is fixed on the platform (A). Two support platforms (32) are fixed on the clamp base (31). The two support platforms (32) are respectively provided with anti-misalignment slots. The clamp base (31) is also provided with two positioning posts (33), which are arranged facing upwards. The shaft cover clamp (3) also includes a clamping member (34) with the pressing portion of the clamping member (34) facing between the two support platforms (32).

3. The air distribution control spindle bearing cover hollow pin assembly equipment according to claim 1 or 2, characterized in that: The support frame (5) includes a vertical plate (51) and a top plate (52). The vertical plate (51) is vertically arranged. The lower edge of the vertical plate (51) is fixedly connected to the pedestal (A). The upper edge of the vertical plate (51) is fixedly connected to the top plate (52). The first pressing component (1) is disposed on the vertical plate (51). The second pressing component (4) is disposed on the top plate (52). The middle part of the vertical plate (51) is provided with a first pressing component return sensor. The upper part of the vertical plate (51) is provided with a second pressing component return sensor.

4. The air distribution control spindle bearing cover hollow pin assembly equipment according to claim 3, characterized in that: The first pressing component (1) includes a lifting cylinder (12), a linear slide rail (13), a slider (14), and a floating seat mounting plate (15). The linear slide rail (13) is vertically arranged on the upright plate (51). The slider (14) is slidably assembled on the linear slide rail (13). The cylinder of the lifting cylinder (12) is fixed to the upright plate (51). The piston rod of the lifting cylinder (12) is parallel to the linear slide rail (13). The piston rod of the lifting cylinder (12) is connected to the slider (14). The floating seat mounting plate (15) is fixedly installed on the slider (14). The floating seat mounting plate (15) is horizontally arranged. The centering device (2) is connected to the lower surface of the floating seat mounting plate (15).

5. The air distribution control spindle bearing cover hollow pin assembly equipment according to claim 1 or 2, characterized in that: The centering device (2) includes a centering base (21) and a centering floating seat (22) disposed on the centering base (21). The centering base (21) is connected to the pressing part of the first pressing assembly (1), and the centering floating seat (22) is connected to the hollow pin clamping mechanism (6).

6. The air distribution control spindle bearing cover hollow pin assembly equipment according to claim 5, characterized in that: The centering base (21) includes two constraint plates (211) that are directly opposite each other and horizontally arranged. The two constraint plates (211) are kept relatively fixed, and a swing chamber is formed between the two constraint plates (211). The centering floating seat (22) is arranged in the swing chamber. The centering floating seat (22) is simultaneously constrained by the two constraint plates (211) and moves in a plane parallel to the constraint plates (211). The constraint plate (211) located below is provided with an extended through hole (21a), and a centering connection part (23) with clearance fit is provided in the extended through hole (21a), and the centering connection part (23) is fixedly connected to the centering floating seat (22); The centering device (2) further includes a circumferential reset device (24), which is arranged around the centering floating seat (22). The circumferential reset device (4) is configured to store energy by the rolling compression of the centering floating seat (22). After storing energy, the circumferential reset device (4) has a tendency to push the centering floating seat (22) to reset.

7. The air distribution control spindle bearing cover hollow pin assembly equipment according to claim 1 or 2, characterized in that: The hollow pin clamping mechanism (6) includes a holding mounting base (61), a hollow pin outer constraint base (62), and a hollow pin inner constraint rod (63). The holding mounting base (61) is fixedly connected to the centering connection part (23). One end of the hollow pin inner constraint rod (63) is fixedly connected to the holding mounting base (61). The hollow pin outer constraint base (62) is provided with a hollow pin constraint hole (62a), and the hollow pin inner constraint rod (63) is disposed in the hollow pin constraint hole (62a). The hollow pin inner constraint rod (63) includes an axial abutment section (631) and a pin cylinder inner section (632). The inner wall of the hollow pin constraint hole (62a) is in contact with the axial abutment section (631). The diameter of the pin cylinder inner section (632) is smaller than the diameter of the hollow pin constraint hole (62a). The pin cylinder inner section (632) and the hollow pin constraint hole (62a) are concentrically arranged. A hollow pin jacket cavity is formed between the outer wall of the pin cylinder inner section (632) and the inner wall of the hollow pin constraint hole (62a).

8. The air distribution control spindle bearing cover hollow pin assembly equipment according to claim 7, characterized in that: The hollow pin inner constraint rod (63) also includes a sliding assembly section (633), which is connected to the pin cylinder inner section (632). The sliding assembly section (633) and the pin cylinder inner section (632) are located on both sides of the axial abutment section (631). The sliding assembly section (633) is axially slidably assembled with the hollow pin constraint hole (62a). The outer wall of the sliding assembly section (633) is provided with a limiting groove (63a) along its axial direction. The two ends of the limiting groove (63a) are closed. The hollow pin outer constraint seat (62) is provided with a sliding limiting block (621). The sliding limiting block (621) extends into the limiting groove (63a). The end of the pin cylinder insert section (632) that is away from the axial abutment section (631) extends out of the hollow pin constraint hole (62a), and the end of the extended end of the pin cylinder insert section (632) is chamfered.

9. The air distribution control spindle bearing cover hollow pin assembly equipment according to claim 3, characterized in that: The second pressing assembly (4) includes a pressing cylinder (42) and a guide rod (43). The guide rod (43) is vertically movably mounted on the top plate (52). The cylinder of the pressing cylinder (42) is fixed on the top plate (52). The piston rod of the pressing cylinder (42) passes downward through the top plate (52) and is connected to the guide rod (43). The lower end of the piston rod of the pressing cylinder (42) is provided with a pressing head (44).

10. The air distribution control spindle bearing cover hollow pin assembly equipment according to claim 1 or 2, characterized in that: A buffer (9) is also arranged on the pressing path of the pressing part of the first pressing component (1). When the pressing part of the first pressing component (1) presses down, it contacts the buffer (9) and decelerates.

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