Polyurethane carrier roller press fitting device and working method thereof

Abstract

The present application relates to a kind of polyurethane roller press mounting device and its working method, including base, supporting mechanism and press mounting mechanism, the base top side middle part is equipped with supporting mechanism, the base top side both ends are slidably installed with press mounting mechanism, the supporting mechanism includes support frame, the support frame top side is slidably installed with two support roller seats, the support frame both ends are equipped with first pneumatic cylinder, the first pneumatic cylinder telescopic end is equipped with the support shaft seat with V-shaped groove;Through the three major core technologies of modularization adjustment, automatic press mounting, dynamic lubrication cleaning, the problems such as low efficiency, poor precision, uneven lubrication existing in traditional roller assembly are solved, especially suitable for the production scene of high-precision, large-batch polyurethane roller, and comprehensive performance reaches industry leading level.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polyurethane roller pressing technology, and in particular relates to a polyurethane roller pressing device and a working method thereof. BACKGROUND

[0002] The polyurethane roller is a key bearing and guiding component for the belt conveying system, and its core feature is that a polyurethane elastomer is coated on the surface of the metal roller body. When assembling the polyurethane roller, the bearing seat, bearing and sealing seat need to be assembled to the end of the roller body.

[0003] The existing device lacks a modular adjustment mechanism, which cannot quickly adapt to different length / diameter rollers, and the tool clamps need to be frequently replaced, and the coaxiality error between the bearing seat and the roller body is often greater than 0.1 mm, which easily causes bearing load imbalance and wear. The existing device can usually only complete a single pressing step, and multiple devices need to be matched, which is low in efficiency, and manual greasing is adopted, which has problems of uneven, excessive or insufficient lubrication, and affects the service life of the bearing. SUMMARY

[0004] The present application solves the technical problems that the existing device lacks a modular adjustment mechanism, which cannot quickly adapt to different length / diameter rollers, and the tool clamps need to be frequently replaced, and the coaxiality error between the bearing seat and the roller body is often greater than 0.1 mm, which easily causes bearing load imbalance and wear; the existing device can usually only complete a single pressing step, and multiple devices need to be matched, which is low in efficiency, and manual greasing is adopted, which has problems of uneven, excessive or insufficient lubrication, and affects the service life of the bearing.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A polyurethane roller pressing device, comprising a base, a supporting mechanism and a pressing mechanism, the base top side middle part is provided with a supporting mechanism, and the base top side both ends are slidably provided with a pressing mechanism, the supporting mechanism comprises a supporting frame, the supporting frame top side is slidably provided with two supporting roller seats, the supporting frame both ends are provided with a first air cylinder, and the first air cylinder telescopic end is provided with a supporting shaft seat with a V-shaped groove;

[0007] The pressing mechanism comprises a translation seat, the translation seat is rotatably provided with a rotating column, the rotating column is provided with a first supporting pipe seat and a second supporting pipe seat which are arranged at an angle of 90°, the first supporting pipe seat end part outer side is provided with a first stop ring, the first stop ring is rotatably provided with a limiting ring seat, the limiting ring seat inner side and outer side are both provided with a groove, the groove is provided with a spray hole, the second supporting pipe seat end part is provided with a second stop ring, the second stop ring outer side is provided with a limiting seat, and the limiting seat is provided with a push ring plate.

[0008] Preferably, a first sliding groove is arranged 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 threadedly connected with the support roller seats.

[0009] Preferably, second sliding grooves are respectively arranged 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 threadedly connected with the translation seats.

[0010] Preferably, a second air cylinder is installed outside the translation seat, a rack is installed at the extending and retracting end of the second air cylinder, a gear is installed at the bottom end of the rotating column in the translation seat, and the gear is engaged with the rack.

[0011] Preferably, the limiting ring seat and the first blocking ring are connected through a bearing, a third motor is installed on the first blocking ring, a driving gear is installed at the output end of the third motor, a transmission gear is installed outside the limiting ring seat, and the transmission gear is engaged with the driving gear.

[0012] Preferably, a micro air pump is installed in the limiting ring seat, first air cavities are equally arranged in the limiting ring seat, a second air cavity is arranged in the limiting ring seat, the first air cavities and the second air cavity are communicated with the micro air pump through an air groove, first pistons are installed in the first air cavities and the second air cavity, and the first pistons are respectively connected with the outer scraping blocks and the inner scraping blocks.

[0013] Preferably, a lubricating oil tank is installed on the limiting ring seat, a third air cylinder is installed on the lubricating oil tank, a second piston is installed at the extending and retracting end of the third air cylinder in the lubricating oil tank, a filling pipe is connected with the bottom end of the lubricating oil tank, a control valve is installed on the filling pipe, and the lubricating oil tank is communicated with the injection holes.

[0014] Preferably, a plurality of slide columns penetrating the second blocking ring are installed on the push ring plate, the slide columns are connected with the sliding ring, guide grooves are arranged on the second support pipe seat, inner push plates are installed in the second support pipe seat, and the connecting arms on the inner push plates penetrate the guide grooves and are 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 push column is installed at the extending and retracting end of the fourth air cylinder.

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

[0017] Step one: the first motor works to drive the first threaded rod to rotate, thereby adjusting the distance between the two support roller seats, supporting the polyurethane carrier roller pipe body through the support roller seat, and supporting the roller shaft through the first air cylinder to drive the support shaft seat to lift, the polyurethane carrier roller pipe body, the roller shaft, the limiting ring seat and the limiting seat are concentric;

[0018] Step two: the bearing seat is sleeved on the limiting ring seat, the bearing and the sealing seat are sleeved on the limiting seat, the first air cavity is pressurized through the micro air pump, until the outer scraping block supports and limits the bearing seat, the push column is moved by the fourth air cylinder, the push column penetrates the first support pipe seat and the limiting ring seat and contacts the end of the roller shaft, the first air cylinder is retracted, the second motor works to drive the second threaded rod to rotate, thereby driving the press fitting mechanism to move, at this time the limiting ring seat inserts the bearing seat into the polyurethane carrier roller pipe 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 is separated 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, 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 the limiting ring seat is rotated in cooperation with the meshing transmission gear, in the rotating process, the second piston is moved downward by the third air cylinder, the lubricating oil in the lubricating oil tank is sprayed to the inner wall of the bearing seat and the outer wall of the roller shaft through the spray hole, and the scraping uniformity is realized with the rotation of the outer scraping block and the inner scraping block;

[0019] Step three: the fourth air cylinder is retracted, the press fitting mechanism moves away from the supporting mechanism, the rack is moved by the second air cylinder, the rack drives the meshing gear to rotate, thereby realizing the rotation of the rotating column, the second support pipe seat is rotated by 90°, at this time the press fitting mechanism is translated to contact the limiting seat and the end of the roller shaft, the push column is inserted into the second support pipe seat by the fourth air cylinder to push the inner push plate to move, the inner push plate drives the sliding ring to move, the sliding ring drives the sliding column and the push ring plate to move, the bearing and the sealing seat are pressed into the polyurethane carrier roller pipe body along the limiting seat and the roller shaft.

[0020] The beneficial effects of the present application are: through the adjustable supporting mechanism, the carrier roller pipe body and the roller shaft of different lengths and different outer diameters can be conveniently supported and limited, the adjustment precision is high and the stability is strong;

[0021] The synchronous press fitting function of the integrated bearing seat, bearing and sealing seat is realized, the position of the bearing seat mounting structure and the bearing and sealing seat mounting structure in the press fitting mechanism is adjusted through the rotating column, a single device completes multiple process operations, the equipment switching time is reduced, the co-concentric design of the limiting ring seat and the limiting seat ensures that the press fitting coaxiality is ≤0.05mm, and the bearing damage caused by eccentricity is avoided;

[0022] The movement of the outer scraping block and the inner scraping block is realized by the operation of the micro air pump, the bearing seat is supported and limited by the outer scraping block before pressing, 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 after the pressing of the bearing seat is completed, the subsequent spray hole precisely sprays lubricating oil, the outer scraping block and the inner scraping block are assisted, the uniform greasing work is carried out on the inner wall of the bearing seat and the outer wall of the roller shaft, the automatic greasing is realized, the uniform greasing is ensured, the lubricating oil tank is linked with the third air cylinder, the quantitative oil supply is realized, and the lubricating grease waste is reduced.

[0023] Through the three core technologies of modular adjustment, automatic pressing, and dynamic lubrication cleaning, the problems of low efficiency, poor precision, uneven lubrication and the like in traditional roller assembly are solved, and the production scene of high-precision and large-batch polyurethane rollers is particularly suitable, and the comprehensive performance reaches the leading level in the industry. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole structure schematic view of the present application;

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

[0026] Figure 3 It is a side view of the pressing mechanism of the present application;

[0027] Figure 4 It is a first structure schematic view of the pressing mechanism of the present application;

[0028] Figure 5 It is a second structure schematic view of the pressing mechanism of the present application;

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

[0030] Figure 7 It is a top view of the pressing mechanism of the present application;

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

[0032] LEGEND:

[0033] 1, base; 2, support mechanism; 3, press-fitting mechanism; 4, support frame; 5, support roller seat; 6, first sliding groove; 7, first motor; 8, first threaded rod; 9, first pneumatic cylinder; 10, support shaft seat; 11, second motor; 12, second sliding groove; 13, second threaded rod; 14, translation seat; 15, second pneumatic cylinder; 16, rack; 17, rotating column; 18, rotating tooth; 19, first support pipe seat; 20, first blocking ring; 21, limiting ring seat; 22, third motor; 23, driving tooth; 24, transmission tooth; 25, micro air pump; 26, first air cavity; 27, outer scraping block; 28, second air cavity; 29, inner scraping block; 30, first piston; 31, air groove; 32, groove; 33, injection hole; 34, lubricating oil tank; 35, third pneumatic cylinder; 36, second piston; 37, feeding pipe; 38, control valve; 39, second support pipe seat; 40, second blocking ring; 41, limiting seat; 42, push ring plate; 43, guide groove; 44, sliding column; 45, sliding ring; 46, inner push plate; 47, mounting plate; 48, fourth pneumatic cylinder; 49, push column. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] Specific embodiments are given below.

[0036] Reference Figures 1-8 A polyurethane roller press-fitting device, comprising a base 1, a support mechanism 2 and a press-fitting mechanism 3, the support mechanism 2 is installed on the top side of the middle part of the base 1, the press-fitting mechanism 3 is slidably installed on the top side of both ends of the base 1, the support mechanism 2 comprises a support frame 4, two support roller seats 5 are slidably installed on the top side of the support frame 4, first pneumatic cylinders 9 are installed on both ends of the support frame 4, support shaft seats 10 provided with V-shaped grooves are installed on the extension ends of the first pneumatic cylinders 9, first sliding grooves 6 are formed in the middle part of the top side of the support frame 4, guide rails parallel to the first sliding grooves 6 are arranged on both ends of the top side of the support frame 4, a first motor 7 is installed on the support frame 4, a first threaded rod 8 is installed on the output end of the first motor 7 and located in the first sliding groove 6, the threaded 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 with the support roller seats 5, through the adjustable support mechanism 2, the roller pipe body and the roller shaft with different lengths and different outer diameters can be conveniently supported and limited, the adjustment precision is high and the stability is strong;

[0037] The base 1 is provided with a second sliding groove 12 at both ends, a second motor 11 is installed at the end of the base 1, a second threaded rod 13 is installed at the output end of the second motor 11 in the second sliding groove 12, the threaded 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 with a translation seat 14. The pressing mechanism 3 comprises the translation seat 14, a rotating column 17 is rotatably installed on the translation seat 14, a second pneumatic cylinder 15 is installed outside the translation seat 14, a rack 16 is installed at the telescopic end of the second pneumatic cylinder 15, a rotating tooth 18 is installed at the bottom end of the rotating column 17 in the translation seat 14, and the rotating tooth 18 is engaged with the rack 16. A first support pipe seat 19 and a second support pipe seat 39 are installed on the rotating column 17 and are arranged at an angle of 90°, a first stop ring 20 is installed at the end outside of the first support pipe seat 19, a limiting ring seat 21 is rotatably installed on the first stop ring 20, grooves 32 are formed on the inner side and the outer side of the limiting ring seat 21, spray holes 33 are formed in the grooves 32, the limiting ring seat 21 and the first stop ring 20 are connected through a bearing, a third motor 22 is installed on the first stop ring 20, a driving tooth 23 is installed at the output end of the third motor 22, a transmission tooth 24 is installed outside the limiting ring seat 21, and the transmission tooth 24 is engaged with the driving tooth 23. A miniature air pump 25 is installed in the limiting ring seat 21, first air cavities 26 are equally spaced and formed in the limiting ring seat 21, a second air cavity 28 is formed in the limiting ring seat 21, the first air cavities 26 and the second air cavity 28 are communicated with the miniature air pump 25 through an air groove 31, first pistons 30 are installed in the first air cavities 26 and the second air cavity 28, and the first pistons 30 are respectively connected with outer scraping blocks 27 and inner scraping blocks 29. A lubricating oil tank 34 is installed on the limiting ring seat 21, a third pneumatic cylinder 35 is installed on the lubricating oil tank 34, a second piston 36 is installed at the telescopic end of the third pneumatic cylinder 35 in the lubricating oil tank 34, a filling pipe 37 is connected to the bottom end of the lubricating oil tank 34, a control valve 38 is installed on the filling pipe 37, the lubricating oil tank 34 is communicated with the spray holes 33, a second stop ring 40 is installed at the end of the second support pipe seat 39, a limiting seat 41 is installed outside the second stop ring 40, a push ring plate 42 is formed on the limiting seat 41, a plurality of slide columns 44 penetrating through the second stop ring 40 are installed on the push ring plate 42, and the slide columns 44 are connected with a sliding ring 45. A guide groove 43 is formed on the second support pipe seat 39, an inner push plate 46 is installed in the second support pipe seat 39, and a connecting arm on the inner push plate 46 penetrates 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 pneumatic cylinder 48 is installed on the installation plate 47, and a push column 49 is installed at the telescopic end of the fourth pneumatic cylinder 48.

[0038] The integrated bearing seat, bearing, sealing seat synchronous pressing function, the position adjustment of the bearing seat installation structure and the bearing, sealing seat installation structure in the pressing mechanism 3 is realized by rotating the rotating column 17, a single device completes multi-process operation, reduces the equipment switching time, the co-center design of the limiting ring seat 21 and the limiting seat 41 ensures that the pressing coaxiality is ≤0.05mm, and avoids the bearing damage caused by eccentricity.

[0039] The movement of the outer scraper block 27 and the inner scraper block 29 is realized by the operation of the micro air pump 25. Before pressing, the bearing seat is supported and limited by the outer scraper block 27. After the bearing seat is pressed, the bearing seat inner wall and the roller shaft outer wall are cleaned by the rotation of the limiting ring seat 21, the outer scraper block 27 and the inner scraper block 29, the subsequent spray hole 33 precisely sprays lubricating oil, and the outer scraper block 27 and the inner scraper block 29 assist in uniform greasing of the bearing seat inner wall and the roller shaft outer wall. The automatic greasing is realized, and the uniform greasing is ensured. The lubricating oil tank 34 is linked with the third air cylinder 35 to realize quantitative oil supply and reduce lubricating grease waste.

[0040] Through the three core technologies of modular adjustment, automatic pressing, and dynamic lubrication cleaning, the problems of low efficiency, poor precision, and uneven lubrication in traditional roller assembly are solved. It is especially suitable for the production scene of high-precision and large-batch polyurethane rollers, and the comprehensive performance reaches the leading level in the industry.

[0041] Working principle:

[0042] Step one: The first threaded rod 8 is rotated by the operation of the first motor 7, and then the distance between the two support roller seats 5 is adjusted. The polyurethane roller tube body is supported by the support roller seat 5, and the roller shaft is supported by the support shaft seat 10 driven by the first air cylinder 9. At this time, the polyurethane roller tube body, the roller shaft, the limiting ring seat 21 and the limiting seat 41 share the same center.

[0043] Step two: the bearing seat is sleeved on the limiting ring seat 21, the bearing and the sealing seat are sleeved on the limiting seat 41, the first air cavity 26 is pressurized by the micro air pump 25, the bearing seat is supported and limited by the outer scraper block 27, the push column 49 is moved by the fourth air cylinder 48, the push column 49 penetrates the first support pipe seat 19 and the limiting ring seat 21 and contacts the roller shaft end, the first air cylinder 9 is retracted, the second threaded rod 13 is rotated by the operation of the second motor 11, and then the pressing mechanism 3 is moved. 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, pressurizes the second air cavity 28, drives the inner scraper block 29 to move, and at the same time, the outer scraper block 27 is separated from the bearing seat. At this time, the outer scraper block 27 is close to but does not contact the inner wall of the bearing seat, and the inner scraper block 29 is close to but does not contact the roller shaft. The limiting ring seat 21 is rotated by the operation of the third motor 22 to drive the driving teeth 23 to rotate, and the transmission teeth 24 are engaged to drive the limiting ring seat 21 to rotate. In the rotation process, the lubricating oil in the lubricating oil tank 34 is sprayed to the bearing seat inner wall and the roller shaft outer wall through the spray hole 33 by the second piston 36 driven by the third air cylinder 35, and the scraping uniform work is realized with the rotation of the outer scraper block 27 and the inner scraper block 29.

[0044] Step three: the fourth pneumatic cylinder 48 is retracted, the pressing mechanism 3 is away from the support mechanism 2, the rack 16 is driven to move by the second pneumatic cylinder 15, the rack 16 drives the meshing gear 18 to rotate, and then the rotation of the rotating column 17 is realized, the second support pipe base 39 is rotated by 90°, at this time the pressing mechanism 3 is translated to the limiting seat 41 and the roller shaft end is in contact, the inner push plate 46 is driven to move by the push column 49 inserted into the second support pipe base 39 driven by the fourth pneumatic cylinder 48, the inner push plate 46 drives the sliding ring 45 to move, the sliding ring 45 drives the sliding column 44 and the push ring plate 42 to move, the bearing and the sealing seat are pressed into the polyurethane roller pipe body along the limiting seat 41 and the roller shaft.

[0045] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art, according to the technical scheme and the inventive concept of the present application, within the technical range disclosed by the present application, makes equivalent replacement or change, should be covered in the protection scope of the present application.

Claims

1. A polyurethane roller press-fitting device, characterized in that: The invention 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 mechanism (3) is 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) includes 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), grooves (32) are 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); A second pneumatic cylinder (15) is installed on the outside of the translation seat (14), and a rack (16) is installed on the telescopic end of the second pneumatic cylinder (15). The bottom end of the rotating column (17) is located in the translation seat (14) and is installed with a rotating gear (18), and the rotating gear (18) is engaged with the rack (16). The limiting ring seat (21) and the first retaining ring (20) are connected through a bearing. The first retaining ring (20) is installed with a third motor (22), and the output end of the third motor (22) is installed with a driving gear (23). The limiting ring seat (21) is provided with a transmission tooth (24) on the outside, and the transmission tooth (24) is meshed with the active tooth (23), a micro air pump (25) is provided in the limiting ring seat (21), a first air cavity (26) is provided in the limiting ring seat (21) at equal intervals, a second air cavity (28) is provided 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 the air groove (31), and a first movable element is provided in each of the first air cavity (26) and the second air cavity (28). The first piston (30) in the first air cavity (26) is connected to the outer scraper (27), and the first piston (30) in the second air cavity (28) is connected to the inner scraper (29). 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). The telescopic end of the third pneumatic cylinder (35) is located in the lubricating oil storage tank (34) and is installed with a second piston (36). The bottom end of the lubricating oil storage tank (34) is connected to 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 hole (33), a plurality of sliding columns (44) penetrating the second retaining ring (40) are installed on the push ring plate (42), and the sliding columns (44) are connected to the slip ring (45), a guide groove (43) is provided on the second support pipe seat (39), an inner push plate (46) is installed in the second support pipe seat (39), and a connecting arm on the inner push plate (46) penetrates the guide groove (43) and is connected to the slip ring (45); The supporting roller seat (5) supports the polyurethane roller tube body, the supporting shaft seat (10) supports the roller shaft, the bearing seat is sleeved onto the limiting ring seat (21), and the bearing and sealing seat are sleeved onto 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 an output end of the first motor (7) is located in the first slide groove (6) and is installed with a first threaded rod (8), 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 sliding 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 sliding groove (12) and a second threaded rod (13) is installed, 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 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).

5. The working method of the polyurethane roller press-fitting device according to claim 4, characterized in that: The specific steps of this working method are as follows: Step 1: The first motor (7) drives the first threaded rod (8) to rotate, thereby adjusting the distance between the two support roller seats (5), supporting the polyurethane roller tube body through the support roller seat (5), and driving the support shaft seat (10) to rise and fall through the first pneumatic cylinder (9) to support the roller shaft. At this time, the polyurethane roller tube body, the roller shaft, the limiting ring seat (21) and the limiting seat (41) are cocentric. Step 2: Fit the bearing seat onto the limiting ring seat (21), fit the bearing and the sealing seat onto the limiting seat (41), apply pressure to the first air cavity (26) through the micro air pump (25) until the outer scraper (27) supports and limits the bearing seat, and drive the push column (49) to move through 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) drives the second threaded rod (13) to rotate, 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 active gear (23) to rotate, and cooperates with the meshing transmission gear (24) to drive the limiting ring seat (21) to rotate. During the rotation, the third pneumatic cylinder (35) drives the second piston (36) to move downward, 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 achieved 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 degrees. 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. 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 along the limit seat (41) and the roller shaft.

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