Polyurethane carrier roller press-fitting device and working method thereof

Abstract

The invention relates to a polyurethane carrier roller press-fitting device and a working method thereof.The polyurethane carrier roller press-fitting device comprises a base, a supporting mechanism and press-fitting mechanisms, the supporting mechanism is installed in the middle of the top side of the base, the press-fitting mechanisms are slidably installed at the two ends of the top side of the base, the supporting mechanism comprises a supporting frame, and two supporting roller seats are slidably installed on the top side of the supporting frame; first pneumatic cylinders are installed at the two ends of the supporting frame, and supporting shaft seats provided with V-shaped grooves are installed at the telescopic ends of the first pneumatic cylinders. Through three core technologies of modular adjustment, automatic press fitting and dynamic lubrication cleaning, the problems of low efficiency, poor precision, uneven lubrication and the like in traditional carrier roller assembly are solved, the device is particularly suitable for production scenes of high-precision and large-batch polyurethane carrier rollers, and the comprehensive performance reaches the industry leading level.

Description

Technical Field

[0001] The present invention relates to the technical field of polyurethane idler press-fitting, and particularly relates to a polyurethane idler press-fitting device and its working method. Background Art

[0002] A polyurethane idler is a key load-bearing and guiding component used in a belt conveyor system. Its core feature is that a polyurethane elastomer is coated on the surface of a metal roller body. When assembling a polyurethane idler, a bearing seat, a bearing, and a seal seat need to be assembled to the end of the roller body.

[0003] Existing devices lack a modular adjustment mechanism, resulting in the inability to quickly adapt to idlers of different lengths / diameters. It is necessary to frequently replace tooling fixtures and rely on manual centering. The coaxiality error between the bearing seat and the roller body is often > 0.1 mm, which easily causes eccentric wear of the bearing. Existing devices usually can only complete a single press-fitting step and require multiple devices to cooperate, resulting in low efficiency. Manual greasing is used, and there are problems such as uneven lubrication, excessive or insufficient lubrication, which affect the bearing life. Summary of the Invention

[0004] The problem solved by the present invention is to provide a polyurethane idler press-fitting device and its working method, which solve the technical problems that existing devices lack a modular adjustment mechanism, resulting in the inability to quickly adapt to idlers of different lengths / diameters, the need to frequently replace tooling fixtures, rely on manual centering, the coaxiality error between the bearing seat and the roller body is often > 0.1 mm, which easily causes eccentric wear of the bearing; existing devices usually can only complete a single press-fitting step, require multiple devices to cooperate, have low efficiency, use manual greasing, and there are problems such as uneven lubrication, excessive or insufficient lubrication, which affect the bearing life.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A polyurethane idler press-fitting device includes a base, a support mechanism, and a press-fitting mechanism. A support mechanism is installed in the middle of the top side of the base, and press-fitting mechanisms are slidably installed at both ends of the top side of the base. The support mechanism includes a support frame, two support roller seats are slidably installed on the top side of the support frame, first air cylinders are installed at both ends of the support frame, and a support shaft seat with a V-shaped groove is installed at the telescopic end of the first air cylinder.

[0007] The press-fitting mechanism includes a translation seat, a rotating column is rotatably installed on the translation seat, a first support tube seat and a second support tube seat are installed on the rotating column at a 90° angle. A first retaining ring is installed outside the end of the first support tube seat, a limiting ring seat is rotatably installed on the first retaining ring, grooves are opened on both the inner and outer sides of the limiting ring seat, spray holes are opened in the grooves, a second retaining ring is installed at the end of the second support tube seat, a limiting seat is installed outside the second retaining ring, and a push ring plate is opened on the limiting seat.

[0008] Preferably, a first sliding groove is formed in the middle of the top side of the support frame, guide rails parallel to the first sliding groove are arranged at both ends of the top side of the support frame, a first motor is installed on the support frame, a first threaded rod is installed at the output end of the first motor in the first sliding groove, the threaded directions of both ends of the first threaded rod are opposite, and both ends of the first threaded rod are respectively in threaded connection with the support roller seat.

[0009] Preferably, second sliding grooves are respectively formed at both ends of the base, a second motor is installed at the end of the base, a second threaded rod is installed at the output end of the second motor in the second sliding groove, the threaded directions of both ends of the second threaded rod are opposite, and both ends of the second threaded rod are respectively in threaded connection with the translation seat.

[0010] Preferably, a second air cylinder is installed on the outer side of the translation seat, a rack is installed at the telescopic end of the second air cylinder, a rotating gear is installed at the bottom end of the rotating column in the translation seat, and the rotating gear meshes with the rack.

[0011] Preferably, the limit ring seat and the first retaining ring are connected by a bearing, a third motor is installed on the first retaining ring, a driving gear is installed at the output end of the third motor, a transmission gear is installed on the outer side of the limit ring seat, and the transmission gear meshes with the driving gear.

[0012] Preferably, a micro air pump is installed in the limit ring seat, first air cavities are equidistantly arranged in the limit ring seat, a second air cavity is formed in the limit ring seat, the first air cavities and the second air cavity are communicated with the micro air pump through air grooves, first pistons are installed in both the first air cavities and the second air cavity, and the first pistons are respectively connected with the outer scraping block and the inner scraping block.

[0013] Preferably, a lubricating oil storage tank is installed on the limit ring seat, a third air cylinder is installed on the lubricating oil storage tank, a second piston is installed at the telescopic end of the third air cylinder in the lubricating oil storage tank, a feeding pipe is connected to the bottom end of the lubricating oil storage tank, a control valve is installed on the feeding pipe, and the lubricating oil storage tank is communicated with the spray holes.

[0014] Preferably, a plurality of sliding columns penetrating through the second retaining ring are installed on the pushing ring plate, the sliding columns are connected with the sliding ring, a guide groove is formed in the second support pipe seat, an inner pushing plate is installed in the second support pipe seat, and a connecting arm on the inner pushing plate penetrates through the guide groove and is connected with the sliding ring.

[0015] Preferably, a mounting plate is installed on the base, a fourth air cylinder is installed on the mounting plate, and a pushing column is installed at the telescopic end of the fourth air cylinder.

[0016] A working method of a polyurethane idler press-fitting device, the specific operation steps of the working method are as follows:

[0017] Step 1: The first motor works to drive the first threaded rod to rotate, thereby adjusting the distance between the two support roller seats. The polyurethane idler tube body is supported by the support roller seats. The first air cylinder drives the support shaft seat to move up and down to support the roller shaft. At this time, the polyurethane idler tube body, the roller shaft, the limit ring seat and the limit seat are concentric;

[0018] Step 2: The bearing seat is sleeved on the limit ring seat, the bearing and the seal seat are sleeved on the limit seat. The micro air pump is used to pressurize the first air cavity until the outer scraping block supports and limits the bearing seat. The fourth air cylinder drives the push column to move. The push column penetrates through the first support tube seat and the limit ring seat and contacts the end of the roller shaft. The first air cylinder contracts, and the second motor works to drive the second threaded rod to rotate, thereby driving the press-fitting mechanism to move. At this time, the limit ring seat inserts the bearing seat into the polyurethane idler tube body. At this time, the micro air pump works to pressurize the second air cavity to drive the inner scraping block to move. At the same time, the outer scraping block separates from the bearing seat. At this time, the outer scraping block is close to but does not contact the inner wall of the bearing seat, and the inner scraping block is close to but does not contact the roller shaft. The third motor works to drive the driving gear to rotate, and cooperates with the meshing transmission gear to drive the limit ring seat to rotate. During the rotation process, the third air cylinder drives the second piston to move down, and the lubricating oil in the lubricating oil storage tank is sprayed onto the inner wall of the bearing seat and the outer wall of the roller shaft through the spray holes, and the scraping and evening work is realized as the outer scraping block and the inner scraping block rotate;

[0019] Step 3: The fourth air cylinder contracts, and the press-fitting mechanism moves away from the support mechanism. The second air cylinder drives the rack to move, and the rack drives the meshing rotating gear to rotate, thereby realizing the rotation of the rotating column. The second support tube seat is rotated 90°. At this time, the press-fitting mechanism is translated to contact the end of the roller shaft with the limit seat. The fourth air cylinder drives the push column to insert into the second support tube seat to push the inner push plate to move. The inner push plate drives the sliding ring to move, and the sliding ring pushes the sliding column and the push ring plate to move, and presses the bearing and the seal seat into the polyurethane idler tube body along the limit seat and the roller shaft.

[0020] The beneficial effects of the present invention are: through the adjustable support mechanism, it is convenient to support and limit the idler tube body and the roller shaft with different lengths and different outer diameters, with high adjustment accuracy and strong stability;

[0021] Integrate the synchronous press-fitting function of the bearing seat, the bearing and the seal seat. The position of the bearing seat installation structure and the bearing and seal seat installation structure in the press-fitting mechanism is adjusted by rotating the rotating column. One device completes multiple processes, reducing the equipment switching time. The co-concentric design of the limit ring seat and the limit seat ensures that the press-fitting coaxiality ≤ 0.05 mm, avoiding bearing damage caused by eccentricity;

[0022] The movement of the outer scraping block and the inner scraping block is realized by the operation of a micro air pump. Before press-fitting, the bearing seat is supported and limited by the outer scraping block. After the bearing seat is press-fitted, through the rotation of the limit ring seat, the inner wall of the bearing seat and the outer wall of the roller shaft are cleaned by the outer scraping block and the inner scraping block. Subsequently, lubricating oil is precisely sprayed through the spray holes. With the assistance of the outer scraping block and the inner scraping block, uniform greasing is carried out on the inner wall of the bearing seat and the outer wall of the roller shaft, realizing automatic greasing and ensuring uniform greasing. The lubricating oil storage tank is linked with the third air cylinder to achieve quantitative oil supply and reduce the waste of lubricating grease;

[0023] Through the three core technologies of modular adjustment, automatic press-fitting, and dynamic lubrication and cleaning, the problems of low efficiency, poor precision, and uneven lubrication existing in traditional idler assembly are solved. It is especially suitable for the production scenarios of high-precision and large-batch polyurethane idlers, and the comprehensive performance reaches the leading level in the industry. Brief Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the support mechanism structure of the present invention;

[0026] Figure 3 It is a side cross-sectional view of the press-fitting mechanism of the present invention;

[0027] Figure 4 It is a first schematic diagram of the press-fitting mechanism of the present invention;

[0028] Figure 5 It is a second schematic diagram of the press-fitting mechanism of the present invention;

[0029] Figure 6 It is a cross-sectional view of the limit ring seat of the present invention;

[0030] Figure 7 It is a top view of the press-fitting mechanism of the present invention;

[0031] Figure 8 It is a cross-sectional view of the second support pipe seat of the present invention.

[0032] Legend Explanation:

[0033] 1. Base; 2. Support mechanism; 3. Pressing mechanism; 4. Support frame; 5. Support roller seat; 6. First chute; 7. First motor; 8. First threaded rod; 9. First pneumatic cylinder; 10. Support shaft seat; 11. Second motor; 12. Second chute; 13. Second threaded rod; 14. Translation seat; 15. Second pneumatic cylinder; 16. Rack; 17. Rotating column; 18. Rotating gear; 19. First support pipe seat; 20. First retaining ring; 21. Limit ring seat; 22. Third motor; 23. Driving gear; 24. Driven gear; 25. Micro air pump; 26. First air chamber; 27. Outer scraping block; 28. Second air chamber; 29. Inner scraping block; 30. First piston; 31. Air groove; 32. Groove; 33. Spray hole; 34. Lubricating oil storage tank; 35. Third pneumatic cylinder; 36. Second piston; 37. Feeding pipe; 38. Control valve; 39. Second support pipe seat; 40. Second retaining ring; 41. Limit seat; 42. Push ring plate; 43. Guide groove; 44. Slide column; 45. Slip ring; 46. Inner push plate; 47. Mounting plate; 48. Fourth pneumatic cylinder; 49. Push column. Detailed implementation manners

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Specific embodiments are given below.

[0036] See Figures 1 to 8 , a polyurethane idler pressing device, including a base 1, a support mechanism 2 and a pressing mechanism 3. The support mechanism 2 is installed in the middle of the top side of the base 1, and the pressing mechanisms 3 are slidably installed at both ends of the top side of the base 1. The support mechanism 2 includes a support frame 4. Two support roller seats 5 are slidably installed on the top side of the support frame 4. The first pneumatic cylinders 9 are installed at both ends of the support frame 4. The telescopic ends of the first pneumatic cylinders 9 are installed with support shaft seats 10 provided with V-shaped grooves. The first chute 6 is opened in the middle of the top side of the support frame 4. Guide rails parallel to the first chute 6 are provided at both ends of the top side of the support frame 4. The first motor 7 is installed on the support frame 4. The output end of the first motor 7 is installed with the first threaded rod 8 in the first chute 6. The thread directions of both ends of the first threaded rod 8 are opposite, and both ends of the first threaded rod 8 are respectively threadedly connected to the support roller seats 5. Through the adjustable support mechanism 2, it is convenient to support and limit the roller tube bodies and roller shafts with different lengths and different outer diameters, and the adjustment accuracy is high and the stability is strong;

[0037] Both ends of the base 1 are respectively provided with second sliding grooves 12. A second motor 11 is installed at the end of the base 1. The output end of the second motor 11 is installed with a second threaded rod 13 in the second sliding groove 12. The threaded directions at both ends of the second threaded rod 13 are opposite, and both ends of the second threaded rod 13 are respectively threadedly connected to the translation seat 14. The press-fitting mechanism 3 includes the translation seat 14. A rotating column 17 is rotatably installed on the translation seat 14. A second air cylinder 15 is installed outside the translation seat 14. The telescopic end of the second air cylinder 15 is installed with a rack 16. A rotating gear 18 is installed at the bottom end of the rotating column 17 inside the translation seat 14, and the rotating gear 18 meshes with the rack 16. A first support pipe seat 19 and a second support pipe seat 39 are installed on the rotating column 17 at a 90° angle. A first retaining ring 20 is installed outside the end of the first support pipe seat 19. A limit ring seat 21 is rotatably installed on the first retaining ring 20. Grooves 32 are opened on both the inner and outer sides of the limit ring seat 21. Spray holes 33 are opened in the grooves 32. The limit ring seat 21 and the first retaining ring 20 are connected by a bearing. A third motor 22 is installed on the first retaining ring 20. The output end of the third motor 22 is installed with a driving gear 23. A transmission gear 24 is installed outside the limit ring seat 21, and the transmission gear 24 meshes with the driving gear 23. A micro air pump 25 is installed inside the limit ring seat 21. First air cavities 26 are equally spaced inside the limit ring seat 21. A second air cavity 28 is opened inside the limit ring seat 21. The first air cavities 26 and the second air cavity 28 are communicated with the micro air pump 25 through air grooves 31. First pistons 30 are installed in both the first air cavities 26 and the second air cavity 28, and the first pistons 30 are respectively connected to the outer scraping block 27 and the inner scraping block 29. A lubricating oil storage tank 34 is installed on the limit ring seat 21. A third air cylinder 35 is installed on the lubricating oil storage tank 34. The telescopic end of the third air cylinder 35 is installed with a second piston 36 inside the lubricating oil storage tank 34. The bottom end of the lubricating oil storage tank 34 is connected with a feeding pipe 37, and a control valve 38 is installed on the feeding pipe 37. The lubricating oil storage tank 34 is communicated with the spray holes 33. A second retaining ring 40 is installed at the end of the second support pipe seat 39. A limit seat 41 is installed outside the second retaining ring 40. A push ring plate 42 is opened on the limit seat 41. A plurality of sliding columns 44 passing through the second retaining ring 40 are installed on the push ring plate 42, and the sliding columns 44 are connected with a sliding ring 45. A guide groove 43 is opened on the second support pipe seat 39. An inner push plate 46 is installed inside the second support pipe seat 39, and the connecting arm on the inner push plate 46 passes through the guide groove 43 and is connected with the sliding ring 45. An installation plate 47 is installed on the base 1. A fourth air cylinder 48 is installed on the installation plate 47, and a push column 49 is installed at the telescopic end of the fourth air cylinder 48;

[0038] Integrate the synchronous press-fitting functions of the bearing seat, bearing, and seal seat. Adjust the positions of the bearing seat installation structure, bearing, and seal seat installation structure in the press-fitting mechanism 3 by rotating the rotating column 17. A single device can complete multiple processes, reducing the equipment switching time. The co-centered design of the limit ring seat 21 and the limit seat 41 ensures that the press-fitting coaxiality ≤ 0.05 mm, avoiding bearing damage caused by eccentricity;

[0039] The movement of the outer scraping block 27 and the inner scraping block 29 is realized by the operation of the micro air pump 25. Before press-fitting, the bearing seat is supported and limited by the outer scraping block 27. After the bearing seat is press-fitted, through the rotation of the limit ring seat 21, the inner wall of the bearing seat and the outer wall of the roller shaft are cleaned by the outer scraping block 27 and the inner scraping block 29. Subsequently, the lubricating oil is accurately sprayed through the spray holes 33. With the assistance of the outer scraping block 27 and the inner scraping block 29, the grease is evenly applied to the inner wall of the bearing seat and the outer wall of the roller shaft, realizing automatic greasing and ensuring even greasing. The lubricating oil storage tank 34 is linked with the third air cylinder 35 to achieve quantitative oil supply and reduce waste of lubricating grease;

[0040] Through the three core technologies of modular adjustment, automatic press-fitting, and dynamic lubrication and cleaning, the problems existing in the traditional idler assembly, such as low efficiency, poor accuracy, and uneven lubrication, are solved. It is especially suitable for the production scenarios of high-precision and large-batch polyurethane idlers, and the comprehensive performance reaches the leading level in the industry.

[0041] Working principle:

[0042] Step 1: The first motor 7 operates to drive the first threaded rod 8 to rotate, thereby adjusting the distance between the two support roller seats 5. The polyurethane idler tube body is supported by the support roller seats 5. The first air cylinder 9 drives the support shaft seat 10 to move up and down to support the roller shaft. At this time, the polyurethane idler tube body, the roller shaft, the limit ring seat 21, and the limit seat 41 are concentric;

[0043] Step 2: The bearing seat is sleeved on the limit ring seat 21, and the bearing and the seal seat are sleeved on the limit seat 41. The micro air pump 25 is used to pressurize the first air chamber 26 until the outer scraping block 27 supports and limits the bearing seat. The fourth air cylinder 48 drives the push column 49 to move. The push column 49 passes through the first support tube seat 19 and the limit ring seat 21 and contacts the end of the roller shaft. The first air cylinder 9 contracts, and the second motor 11 operates to drive the second threaded rod 13 to rotate, thereby driving the press-fitting mechanism 3 to move. At this time, the limit ring seat 21 inserts the bearing seat into the polyurethane idler tube body. At this time, the micro air pump 25 operates to pressurize the second air chamber 28 to drive the inner scraping block 29 to move. At the same time, the outer scraping block 27 separates from the bearing seat. At this time, the outer scraping block 27 is close to but does not contact the inner wall of the bearing seat, and the inner scraping block 29 is close to but does not contact the roller shaft. The third motor 22 operates to drive the driving gear 23 to rotate, and cooperates with the meshing transmission gear 24 to drive the limit ring seat 21 to rotate. During the rotation, the third air cylinder 35 drives the second piston 36 to move downwards, and the lubricating oil in the lubricating oil storage tank 34 is sprayed onto the inner wall of the bearing seat and the outer wall of the roller shaft through the spray holes 33, and the scraping and evening work is realized as the outer scraping block 27 and the inner scraping block 29 rotate;

[0044] Step 3: The fourth air cylinder 48 contracts, the press-fitting mechanism 3 moves away from the support mechanism 2, the rack 16 is driven to move by the second air cylinder 15, the rack 16 drives the engaged rotating gear 18 to rotate, thereby realizing the rotation of the rotating column 17, and rotating the second support pipe seat 39 by 90°. At this time, the press-fitting mechanism 3 is translated to contact the end of the roller shaft with the limit seat 41. The push column 49 is driven by the fourth air cylinder 48 to insert into the second support pipe seat 39 to push the inner push plate 46 to move. The inner push plate 46 drives the slip ring 45 to move. The slip ring 45 pushes the slide column 44 and the push ring plate 42 to move, and presses the bearing and the seal seat into the polyurethane roller tube body along the limit seat 41 and the roller shaft.

[0045] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A polyurethane roller press-fitting device, characterized in that: It comprises a base (1), a support mechanism (2) and a press-fitting mechanism (3), wherein the support mechanism (2) is installed in the middle of the top side of the base (1), and the press-fitting mechanisms (3) are slidably installed at both ends of the top side of the base (1), and the support mechanism (2) comprises a support frame (4), and two support roller seats (5) are slidably installed on the top side of the support frame (4), and first pneumatic cylinders (9) are installed at both ends of the support frame (4), and a support shaft seat (10) with a V-shaped groove is installed at the telescopic end of the first pneumatic cylinder (9); The pressing mechanism (3) comprises a translation seat (14), a rotating column (17) is rotatably mounted on the translation seat (14), a first support tube seat (19) and a second support tube seat (39) arranged at an angle of 90° are mounted on the rotating column (17), a first retaining ring (20) is mounted on the outer side of the end of the first support tube seat (19), a limiting ring seat (21) is rotatably mounted on the first retaining ring (20), a groove (32) is provided on the inner and outer sides of the limiting ring seat (21), a spray hole (33) is provided in the groove (32), a second retaining ring (40) is mounted on the end of the second support tube seat (39), a limiting seat (41) is mounted on the outer side of the second retaining ring (40), and a push ring plate (42) is provided on the limiting seat (41).

2. The polyurethane roller press-fitting device according to claim 1, characterized in that: A first slide groove (6) is provided in the middle of the top side of the support frame (4), and guide rails parallel to the first slide groove (6) are provided at both ends of the top side of the support frame (4). A first motor (7) is installed on the support frame (4), and the output end of the first motor (7) is located in the first slide groove (6) and a first threaded rod (8) is installed therein, the thread directions of the two ends of the first threaded rod (8) are opposite, and the two ends of the first threaded rod (8) are respectively threadedly connected to the support roller seat (5).

3. The polyurethane roller press-fitting device according to claim 2, characterized in that: The base (1) is provided with a second slide groove (12) at both ends, a second motor (11) is installed at the end of the base (1), an output end of the second motor (11) is located in the second slide groove (12) and a second threaded rod (13) is installed therein, the thread directions of the two ends of the second threaded rod (13) are opposite, and the two ends of the second threaded rod (13) are respectively threadedly connected to the translation seat (14).

4. The polyurethane roller press-fitting device according to claim 3, characterized in that: A second pneumatic cylinder (15) is installed on the outer side of the translation seat (14), a rack (16) is installed on the telescopic end of the second pneumatic cylinder (15), and a rotating tooth (18) is installed on the bottom end of the rotating column (17) located inside the translation seat (14), and the rotating tooth (18) is meshed with the rack (16).

5. The polyurethane roller press-fitting device according to claim 4, characterized in that: The limiting ring seat (21) and the first retaining ring (20) are connected via a bearing; a third motor (22) is mounted on the first retaining ring (20); a driving tooth (23) is mounted on the output end of the third motor (22); a transmission tooth (24) is mounted on the outer side of the limiting ring seat (21), and the transmission tooth (24) is meshed with the driving tooth (23).

6. The polyurethane roller press-fitting device according to claim 5, characterized in that: A micro air pump (25) is installed in the limiting ring seat (21), a first air cavity (26) is opened in the limiting ring seat (21) at equal intervals, a second air cavity (28) is opened in the limiting ring seat (21), the first air cavity (26) and the second air cavity (28) are connected to the micro air pump (25) through an air groove (31), a first piston (30) is installed in both the first air cavity (26) and the second air cavity (28), and the first piston (30) is respectively connected to the outer scraper block (27) and the inner scraper block (29).

7. The polyurethane roller press-fitting device according to claim 6, characterized in that: A lubricating oil storage tank (34) is installed on the limiting ring seat (21), a third pneumatic cylinder (35) is installed on the lubricating oil storage tank (34), a second piston (36) is installed at the telescopic end of the third pneumatic cylinder (35) located in the lubricating oil storage tank (34), a feeding pipe (37) is connected to the bottom end of the lubricating oil storage tank (34), and a control valve (38) is installed on the feeding pipe (37), and the lubricating oil storage tank (34) is communicated with the spray hole (33).

8. The polyurethane roller press-fitting device according to claim 7, characterized in that: A plurality of slide columns (44) penetrating the second retaining ring (40) are installed on the push ring plate (42), and the slide columns (44) are connected to the slide ring (45). A guide groove (43) is provided on the second support tube seat (39), and an inner push plate (46) is installed in the second support tube seat (39), and a connecting arm on the inner push plate (46) penetrates the guide groove (43) and is connected to the slide ring (45).

9. The polyurethane roller press-fitting device according to claim 8, characterized in that: A mounting plate (47) is mounted on the base (1), a fourth pneumatic cylinder (48) is mounted on the mounting plate (47), and a push column (49) is mounted on the telescopic end of the fourth pneumatic cylinder (48).

10. The working method of the polyurethane roller press-fitting device according to claim 1, characterized in that: The specific steps of this working method are as follows: Step 1: The first threaded rod (8) is driven to rotate by the first motor (7), thereby adjusting the distance between the two support roller seats (5), supporting the polyurethane roller tube body by the support roller seat (5), and driving the support shaft seat (10) to rise and fall by the first pneumatic cylinder (9) to support the roller shaft, at which time the polyurethane roller tube body, the roller shaft, the limit ring seat (21) and the limit seat (41) are co-centered; Step 2: The bearing seat is mounted on the limiting ring seat (21), and the bearing and the sealing seat are mounted on the limiting seat (41). The micro air pump (25) is used to pressurize the first air cavity (26) until the outer scraper block (27) supports and limits the bearing seat. The push column (49) is driven to move by the fourth pneumatic cylinder (48). The push column (49) penetrates the first support tube seat (19) and the limiting ring seat (21) and contacts the end of the roller shaft. The first pneumatic cylinder (9) contracts, and the second motor (11) is driven to rotate the second threaded rod (13), thereby driving the pressing mechanism (3) to move. At this time, the limiting ring seat (21) inserts the bearing seat into the polyurethane roller tube body. At this time, the micro air pump (25) works. The inner scraper (29) is moved by applying pressure to the second air chamber (28), and the outer scraper (27) is separated from the bearing seat. At this time, the outer scraper (27) is close to but does not contact the inner wall of the bearing seat, and the inner scraper (29) is close to but does not contact the roller shaft. The third motor (22) drives the driving gear (23) to rotate, and cooperates with the meshing transmission gear (24) to drive the limit ring seat (21) to rotate. During the rotation process, the second piston (36) is driven downward by the third pneumatic cylinder (35), and the lubricating oil in the lubricating oil storage tank (34) is sprayed onto the inner wall of the bearing seat and the outer wall of the roller shaft through the spray hole (33). The scraping operation is realized as the outer scraper (27) and the inner scraper (29) rotate. Step 3: The fourth pneumatic cylinder (48) contracts, the pressing mechanism (3) moves away from the supporting mechanism (2), and the rack (16) is driven to move by the second pneumatic cylinder (15), and the rack (16) drives the meshing rotating gear (18) to rotate, thereby realizing the rotation of the rotating column (17), and rotating the second supporting tube seat (39) by 90°. At this time, the pressing mechanism (3) is translated to the limit seat (41) and contacts the end of the roller shaft. The push column (49) is driven by the fourth pneumatic cylinder (48) to be inserted into the second supporting tube seat (39) to push the inner push plate (46) to move, and the inner push plate (46) drives the slip ring (45) to move, and the slip ring (45) pushes the slide column (44) and the push ring plate (42) to move, and the bearing and the sealing seat are pressed into the polyurethane roller tube body along the limit seat (41) and the roller shaft.

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