A guide roller mounting structure

Abstract

The application relates to the technical field of guide rollers, in particular to a guide roller mounting structure which comprises a guide roller assembly, the guide roller assembly is provided with a fixing base, a fixing shaft, a first bearing, a guide roller body and a retaining ring, the fixing shaft is inserted into the fixing base and fixedly connected with the fixing base, the first bearing is sleeved on one end of the fixing shaft away from the fixing base; the guide roller body is provided with a roller part for being sleeved on the outside of the first bearing and a first baffle arranged on the side of the roller part away from the fixing base; the retaining ring is detachably arranged on the side of the roller part away from the first baffle; and the fixing shaft is further provided with a mounting assembly for quickly disassembling the guide roller body. The application enables the bearing to be quickly installed into the guide roller or taken out from the guide roller, thereby facilitating maintenance personnel to maintain and overhaul the guide roller.

Description

Technical Field

[0001] This invention relates to the field of guide roller technology, and more specifically to a guide roller mounting structure. Background Technology

[0002] Injection molding machines are the main molding equipment used to produce various plastic parts from thermoplastic or thermosetting plastics. The typical working process of an injection molding machine is as follows: granular or powdered plastic is fed from the hopper of the injection molding machine into a preheated molten plastic cylinder at a certain temperature. After being heated and melted into a flowing state, it is pushed by a hydraulic motor and screw through the nozzle at the front end of the molten plastic cylinder and injected into a mold at a lower temperature. Under pressure, the molten plastic material is cooled and solidified to become a plastic product.

[0003] Most injection molding machines are equipped with guide rollers to assist in movement. These guide rollers typically have pre-installed bearings inside, allowing them to be directly mounted on a fixed shaft for use. However, this also makes maintenance of the guide rollers more complicated when the outer layer or bearings are damaged. If the damage is irreparable, the entire guide roller needs to be replaced, increasing unnecessary costs. Furthermore, the disassembly and assembly of the guide rollers to the fixed shaft is also cumbersome, increasing working time and reducing work efficiency. Summary of the Invention

[0004] To address the aforementioned issues, a guide roller mounting structure is provided. This structure consists of a roller portion and a first baffle on one side of the roller portion, while the other side of the guide roller is sealed by a retaining ring. This allows for the quick placement or removal of bearings from the guide roller, facilitating maintenance and repair by personnel and improving work efficiency.

[0005] To address the problems of existing technologies, the present invention provides a guide roller mounting structure, including a guide roller assembly. The guide roller assembly has a fixed base, a fixed shaft, a first bearing, a guide roller body, and a retaining ring. The fixed shaft is inserted into and fixedly connected to the fixed base. The first bearing is sleeved on the end of the fixed shaft away from the fixed base. The guide roller body has a roller portion for sleeved on the outside of the first bearing and a first baffle disposed on the side of the roller portion away from the fixed base. The retaining ring is detachably disposed on the side of the roller portion away from the first baffle. The fixed shaft is also provided with a mounting assembly for quick assembly and disassembly of the guide roller body.

[0006] Preferably, the mounting assembly includes a rotating bushing, a fixed rod, an abutment block, an abutment ring, and a first compression spring; the rotating bushing is disposed inside the end of the fixed shaft on which the guide roller body is mounted, and the rotating bushing is rotatably connected to the fixed shaft; the fixed rod is inserted into the inner cavity of the rotating bushing from the outside of the first baffle; at least two abutment blocks are disposed opposite to each other at the end of the fixed rod inserted into the rotating bushing; the abutment ring is disposed in the inner cavity of the rotating bushing, the axis of the abutment ring is collinear with the axis of the rotating bushing, and the inner ring of the abutment ring abuts against the abutment block on the fixed rod; the first compression spring is disposed inside the fixed bushing and sleeved on the outside of the fixed rod, and the two ends of the first compression spring are fixedly connected to the abutment ring and the rotating bushing, respectively.

[0007] Preferably, the abutment block and the fixing rod are in sliding engagement, and the sliding direction of the abutment block is parallel to the radial direction of the fixing rod; the mounting assembly also includes a limiting rod; the outer side of the first baffle of the limiting rod is inserted into the interior of the fixing rod, and the axis of the limiting rod is collinear with the axis of the fixing rod; one end of the limiting rod inserted into the interior of the fixing rod is provided with an inclined groove for driving the abutment block to move and a second compression spring connected to the fixing rod.

[0008] Preferably, the end of the abutting block that abuts against the abutting ring is provided with a bevel.

[0009] Preferably, the outer ring of the abutment ring is provided with a slide rail; the inner wall of the rotating bushing is provided with a slide groove that cooperates with the slide rail; the abutment ring achieves smooth sliding within the rotating bushing through the slide groove and the slide rail.

[0010] Preferably, an oil scraper sleeve is fitted on the outer side of the fixed shaft. One end of the oil scraper sleeve abuts against the retaining ring, and the other end of the oil scraper sleeve is inserted into the interior of the fixed seat. The top of the fixed seat is provided with an oil injection hole, and the interior of the fixed seat is provided with a first passage communicating with the oil injection hole. The other end of the first passage is connected to the interior of the oil scraper sleeve.

[0011] Preferably, the inner wall of the oil scraper sleeve is provided with a scraper blade spirally arranged along the axis of the oil scraper sleeve; a second bearing is sleeved on one end of the oil scraper sleeve inserted into the fixed seat; a second passage is provided on the first passage to communicate with the second bearing.

[0012] Preferably, a plurality of sliding groups are provided between the rotating bushing and the fixed shaft, and the sliding groups are linearly distributed along the axis of the rotating bushing; the sliding groups have a plurality of balls circumferentially distributed along the axis of the rotating bushing; a guide groove is provided between two adjacent sliding components; and a through groove extending to the guide groove is provided on the outer side of the fixed shaft.

[0013] Preferably, the inner side of the retaining ring is provided with a plurality of circumferentially distributed tenons; the guide roller body is provided with mortises that cooperate with the tenons, and the mortises are tightly fitted with the tenons.

[0014] Preferably, a positioning ring is provided on the outer side of the retaining ring, and the outer wall of the oil scraper sleeve abuts against the inner wall of the positioning ring; the outer wall of the positioning ring is provided with a number of positioning pins distributed circumferentially along the axis of the retaining ring, and the positioning pins pass through from the outer side of the positioning ring into the outer wall of the oil scraper sleeve.

[0015] The advantages of this invention compared to the prior art are: 1. The present invention comprises a guide roller consisting of a roller portion and a first baffle plate disposed on one side of the roller portion, while the other side of the guide roller is sealed by a retaining ring. This allows the bearing to be quickly placed into or removed from the guide roller, thereby facilitating maintenance and repair by maintenance personnel and improving work efficiency.

[0016] 2. The present invention provides a rotating bushing inside a fixed shaft and an abutting ring inside the rotating bushing, and an abutting block on a fixed rod that abuts against the abutting ring. By passing the fixed rod through the first baffle and through the mutual abutting between the abutting block and the abutting ring, the guide roller is quickly installed on the fixed shaft.

[0017] 3. By setting an inclined surface on the abutment block, the present invention enables the abutment block to retract along its inclined surface into the fixed rod when the fixed rod is pulled out from the inside of the rotating bushing, thereby ensuring that the fixed rod can be smoothly pulled out from the inside of the rotating bushing.

[0018] 4. The present invention provides an oil scraper sleeve on the outside of the fixed shaft, and the inner wall of the oil scraper sleeve is provided with a scraper with a bolt structure, so that when the oil scraper sleeve rotates, the lubricating oil inside the fixed seat can be quickly transported to the inside of the guide roller. Attached Figure Description

[0019] Figure 1 A three-dimensional diagram of a guide roller mounting structure Figure 1 .

[0020] Figure 2 This is a front sectional view of a guide roller mounting structure.

[0021] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0022] Figure 4 This is a schematic diagram of the structure when the guide roller is installed on the fixed shaft.

[0023] Figure 5 yes Figure 4 A magnified view of a section at point B in the middle.

[0024] Figure 6 yes Figure 4 A magnified view of a section at point C.

[0025] Figure 7This is a guide roller mounting structure that conceals the cross-sectional view of the guide roller.

[0026] Figure 8 This is a 3D schematic diagram of the oil scraper sleeve.

[0027] Figure 9 This is a schematic diagram of a rotating bushing installed inside a fixed shaft.

[0028] Figure 10 A three-dimensional diagram of a guide roller mounting structure Figure 2 .

[0029] The diagram is labeled as follows: 1-Guide roller assembly; 11-Fixed seat; 111-Oil injection hole; 112-First passage; 113-Second passage; 12-Fixed shaft; 13-First bearing; 14-Guide roller body; 141-Roller section; 142-First baffle; 15-Retaining ring; 151-Ton; 16-Oil scraper sleeve; 161-Scraper; 17-Second bearing; 18-Positioning pin; 2-Mounting assembly; 21-Rotating bushing; 211-Slide groove; 212-Sliding assembly; 213-Guide groove; 22-Fixed rod; 23-Abutting block; 231-Inclined surface; 24-Abutting ring; 241-Slide rail; 25-First compression spring; 26-Limiting rod; 261-Inclined groove; 27-Second compression spring. Detailed Implementation

[0030] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0031] Reference Figure 1 — Figure 4 As shown, the present invention provides: a guide roller mounting structure, including a guide roller assembly 1, which has a fixed base 11, a fixed shaft 12, a first bearing 13, a guide roller body 14, and a retaining ring 15. The fixed shaft 12 is inserted into the fixed base 11 and fixedly connected to the fixed base 11. The first bearing 13 is sleeved on the end of the fixed shaft 12 away from the fixed base 11. The guide roller body 14 has a roller portion 141 for sleeved on the outside of the first bearing 13 and a first baffle 142 disposed on the side of the roller portion 141 away from the fixed base 11. The retaining ring 15 is detachably disposed on the side of the roller portion 141 away from the first baffle 142. The fixed shaft 12 is also provided with a mounting assembly 2 for quick assembly and disassembly of the guide roller body 14.

[0032] The first bearing 13 is a double-row tapered roller bearing, which can bear large radial and axial loads. Simultaneously, the double-row tapered roller bearing has high rigidity and can withstand large bending and torsional forces, thus ensuring the service life of the guide roller and eliminating the need for periodic disassembly for maintenance. The double-row tapered roller bearing has low friction between the rollers and raceways, resulting in high rotational speeds to meet the high-speed rotation requirements of the guide roller. The roller portion 141 and the first baffle 142 constitute a guide roller body 14 with a C-shaped cross-section, allowing the first bearing 13 to be placed into the guide roller body through the opening of the guide roller body 14. Inside the guide roller body 14, the guide roller body 14 is then installed on the fixed shaft 12. The open side of the guide roller body 14 is provided with a retaining ring 15. The retaining ring 15 is detachably fixed to the guide roller body 14. At the same time, the center of the retaining ring 15 is provided with a circular hole to avoid the fixed shaft 12. The diameter of the circular hole is larger than the diameter of the fixed shaft 12. In this way, when the first bearing 13 is placed inside the guide roller body 14 and the retaining ring 15 is installed on the guide roller body 14, it can be ensured that the fixed shaft 12 passes smoothly through the retaining ring 15 and is inserted into the inner ring of the first bearing 13. Then, the guide roller body 14 is fixed on the fixed shaft 12 by the mounting assembly 2.

[0033] Reference Figure 3 As shown: Mounting assembly 2 includes a rotating bushing 21, a fixing rod 22, an abutment block 23, an abutment ring 24, and a first compression spring 25; the rotating bushing 21 is disposed inside one end of the fixed shaft 12 on which the guide roller body 14 is mounted, and the rotating bushing 21 is rotatably connected to the fixed shaft 12; the fixing rod 22 is inserted into the inner cavity of the rotating bushing 21 from the outside of the first baffle 142; at least two abutment blocks 23 are disposed opposite to each other at the end of the fixed rod 22 inserted into the rotating bushing 21; the abutment ring 24 is disposed in the inner cavity of the rotating bushing 21, the axis of the abutment ring 24 is collinear with the axis of the rotating bushing 21, and the inner ring of the abutment ring 24 abuts against the abutment block 23 on the fixing rod 22; the first compression spring 25 is disposed inside the fixed shaft 12 and sleeved on the outside of the fixing rod 22, and the two ends of the first compression spring 25 are fixedly connected to the abutment ring 24 and the rotating bushing 21, respectively.

[0034] The rotating bushing 21 is disposed inside the fixed shaft 12. An annular baffle is provided at one end of the rotating bushing 21 near the guide roller body 14. After the abutment ring 24 is placed inside the rotating bushing 21, the abutment ring 24 and the annular baffle are connected by a first compression spring 25. The fixing rod 22 is inserted into the rotating bushing 21 from the outside of the first baffle 142, passing through the abutment ring 24. This causes the abutment block 23 on the fixing rod 22 to abut against the inner ring of the abutment ring 24. Under the action of the first compression spring 25, the fixing rod 22 continuously moves into the rotating bushing 21, thereby fixing the guide roller body 14 onto the fixed shaft 12. The guide roller body 14 is fixed by inserting the fixing rod 22 into the rotating bushing 21. Since the rotating bushing 21 and the fixed shaft 12 are rotatably connected, the fixing rod 22, when inserted into the rotating bushing 21 and abutting against the first baffle 142, will not interfere with the normal rotation of the guide roller body 14.

[0035] Reference Figure 4 and Figure 5 As shown: the abutment block 23 and the fixing rod 22 are in sliding engagement, and the sliding direction of the abutment block 23 is parallel to the radial direction of the fixing rod 22; the mounting assembly 2 also includes a limiting rod 26; the outer side of the first baffle 142 of the limiting rod 26 is inserted into the interior of the fixing rod 22, and the axis of the limiting rod 26 is collinear with the axis of the fixing rod 22; one end of the limiting rod 26 inserted into the interior of the fixing rod 22 is provided with a slanted groove 261 for driving the abutment rod to move and a second compression spring 27 connected to the fixing rod 22.

[0036] The limiting rod 26 is inserted into the fixed rod 22 from the outside. The insertion end of the limiting rod 26 has a groove 261, which abuts against the abutting block 23. During insertion, the limiting rod 26 drives the abutting block 23 outward along the radial direction of the fixed rod 22 via the groove 261, allowing the abutting block 23 to abut against the inner ring of the abutting ring 24, thus fixing the guide roller body onto the fixed shaft 12. A first annular retaining ring 15 is provided at the end of the limiting rod 26 inserted into the fixed rod 22, while a second annular retaining ring 15 is provided on the side of the fixed rod 22 near the first baffle 142. The second compression spring 27 is disposed within the first annular retaining ring 15. Between the second annular retaining ring 15, the limiting rod 26 is driven to insert into the fixed rod 22, and after the abutment block 23 is extended, the position of the abutment block 23 is restricted, thereby preventing the abutment block 23 from retracting into the fixed rod 22, causing the fixed rod 22 to slide out from the rotating bushing 21, thereby causing the guide roller body 14 to fall off the fixed shaft 12; when the guide roller body 14 needs to be removed for maintenance and repair, the limiting rod 26 is first made to overcome the force of the second compression spring 27 and begin to move outward, so that the abutment block 23 can retract into the fixed rod 22, thereby the fixed rod 22 can be pulled out from the rotating bushing 21, and then the guide roller body 14 can be removed from the fixed shaft 12.

[0037] Reference Figure 5 As shown: The end of the abutting block 23 that abuts against the abutting ring 24 is provided with a slope 231.

[0038] The abutment block 23 has an outwardly extending end with a slope 231, which allows the limiting rod 26 to be pulled outwards. Simultaneously, under the force of the second compression spring 27, the fixing rod 22 moves outwards along with the limiting rod 26. At this time, the abutment block 23 abuts against the inner ring of the abutment ring 24 through the slope 231. Driven by the first compression spring 25, the abutment ring 24 will not move outwards along the axial direction of the rotating sleeve 21, thus allowing the abutment block 23 to retract back to the fixing rod 22 under the guidance of the slope 231. The fixed rod 22 can be pulled out from the rotating bushing 21, and the guide roller body 14 can be removed from the fixed shaft 12 for related maintenance and repair. When the abutting block 23 and the abutting ring 24 abut against each other, the limiting rod 26 restricts the abutting block 23, so that the abutting block 23 will not retract into the fixed rod 22 under the contact of the inclined surface 231 and the abutting ring 24, thereby ensuring that the mounting assembly 2 can securely install the guide roller body 14 onto the fixed shaft 12.

[0039] Reference Figure 5As shown: the outer ring of the abutment ring 24 is provided with a slide rail 241; the inner wall of the rotating bushing 21 is provided with a slide groove 211 that cooperates with the slide rail 241; the abutment ring 24 achieves smooth sliding within the rotating bushing 21 through the slide groove 211 and the slide rail 241.

[0040] The abutment ring 24 achieves smooth sliding with the inside of the rotating bushing 21 through the slide rail 241 and the slide groove 211, and can limit the relative rotation between the abutment ring 24 and the rotating bushing 21, thereby ensuring the stable connection between the mounting assembly 2 and the guide roller body 14 and the fixed shaft 12.

[0041] Reference Figure 7 As shown: an oil scraper sleeve 16 is fitted on the outer side of the fixed shaft 12. One end of the oil scraper sleeve 16 abuts against the retaining ring 15, and the other end of the oil scraper sleeve 16 is inserted into the fixed seat 11. The top of the fixed seat 11 is provided with an oil injection hole 111. The interior of the fixed seat 11 is provided with a first passage 112 that communicates with the oil injection hole 111. The other end of the first passage 112 communicates with the interior of the oil scraper sleeve 16.

[0042] An oil scraper sleeve 16 is fitted on the outer side of the fixed shaft 12, with a certain gap between the oil scraper sleeve 16 and the fixed shaft 12. At the same time, one end of the oil scraper sleeve 16 abuts against the retaining ring 15. Thus, when it is necessary to add lubricating oil to the first bearing 13, lubricating oil is first injected through the oil injection hole 111 at the top of the fixed seat 11. Then, the lubricating oil enters the interior of the oil scraper sleeve 16 through the first passage 112, and then reaches the retaining ring 15 through the gap between the oil scraper sleeve 16 and the fixed shaft 12. Since the circular hole at the center of the retaining ring 15 is larger than the shaft diameter of the fixed shaft 12, the lubricating oil can enter the interior of the guide roller body 14 through the circular hole, thereby adding lubricating oil to the first bearing 13 for lubrication. This method does not require disassembling the guide roller body 14 to add lubricating oil, thereby reducing working time and improving working efficiency.

[0043] Reference Figure 8 As shown: the inner wall of the oil scraper sleeve 16 is provided with a scraper 161 spirally arranged along the axis of the oil scraper sleeve 16; a second bearing 17 is sleeved on one end of the oil scraper sleeve 16 inserted into the fixed seat 11; a second passage 113 communicating with the second bearing 17 is provided on the first passage 112.

[0044] The inner wall of the oil scraper sleeve 16 is provided with a spiral scraper 161, and the end of the oil scraper sleeve 16 inserted into the fixed seat 11 is fitted with a second bearing 17. Therefore, when the guide roller body 14 rotates, the oil scraper sleeve 16 can rotate synchronously, so that the lubricating oil can be quickly moved from the inside of the fixed seat 11 to the inside of the guide roller body 14 under the drive of the spiral scraper 161, thereby quickly adding lubricating oil to the first bearing 13. The second bearing 17 is fitted on the oil scraper sleeve 16 and is located inside the fixed seat 11. At the same time, the first passage 112 is provided with a second passage 113 that communicates with the second bearing 17, so that when adding lubricating oil, the second bearing 17 can be added at the same time. One side of the second bearing 17 is provided with an oil baffle, and the other side is connected to the outside, so as to ensure that the lubricating oil can smoothly enter the inside of the second bearing 17 through the second passage 113, and the oil baffle can ensure that the lubricating oil in the second bearing 17 will not leak out.

[0045] Reference Figure 9 As shown: a plurality of sliding groups 212 are provided between the rotating bushing 21 and the fixed shaft 12, and the sliding groups 212 are linearly distributed along the axis of the rotating bushing 21; the sliding groups 212 have a plurality of balls circumferentially distributed along the axis of the rotating bushing 21; a guide groove 213 is provided between two adjacent sliding groups 212; a through groove extending to the guide groove 213 is provided on the outer side of the fixed shaft 12.

[0046] The through groove is set on the fixed shaft 12 inside the retaining ring 15. When the lubricating oil enters the guide roller body 14 through the oil scraper sleeve 16, a part of the lubricating oil will enter the guide groove 213 from the through groove on the fixed shaft 12, and then enter each sliding group 212 through the guide groove 213 to lubricate the balls of the sliding group 212. This ensures smooth rotation between the rotating bushing 21 and the fixed shaft 12 and reduces the wear rate of the sliding group 212.

[0047] Reference Figure 6 As shown: the inner side of the retaining ring 15 is provided with a number of circumferentially distributed tenon blocks 151; the guide roller body 14 is provided with a mortise that cooperates with the tenon blocks 151, and the mortise and tenon blocks 151 are tightly fitted together.

[0048] The retaining ring 15 and the guide roller body 14 are detachably fixedly connected by a tenon 151 and a mortise. Since the tenon 151 and the mortise are tightly fitted, a groove for assisting disassembly can be provided on the outside of the retaining ring 15, so that maintenance personnel can easily remove the retaining ring 15 from the guide roller body 14.

[0049] Reference Figure 10As shown: a positioning ring is provided on the outer side of the retaining ring 15, and the outer wall of the oil scraper sleeve 16 abuts against the inner wall of the positioning ring; the outer wall of the positioning ring is provided with a number of positioning pins 18 distributed circumferentially along the axis of the retaining ring 15, and the positioning pins 18 pass through from the outer side of the positioning ring to the outer wall of the oil scraper sleeve 16.

[0050] One end of the oil scraper sleeve 16 is inserted into the positioning ring, so that the outer wall of the oil scraper sleeve 16 fits against the inner wall of the positioning ring. Then, the positioning pin 18 passes through the outside of the positioning ring into the oil scraper sleeve 16, and the positioning pin 18 is in close cooperation with the positioning ring and the oil scraper sleeve 16, thereby ensuring the fixed connection between the oil scraper sleeve 16 and the retaining ring 15, so that the oil scraper sleeve 16 can rotate synchronously with the guide roller body 14. Since the oil scraper sleeve 16 is fixedly connected to the retaining ring 15, when disassembling the guide roller body 14, the retaining ring 15 can be separated from the guide roller body 14 first, and then the guide roller body 14 and the first bearing 13 can be removed from the fixed shaft 12. Then, corresponding maintenance and repair can be carried out to ensure that the guide roller and the first bearing 13 can continue to be used.

[0051] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A guide roller mounting structure, comprising a guide roller assembly (1), the guide roller assembly (1) having a fixed seat (11), a fixed shaft (12), a first bearing (13), a guide roller body (14) and a retaining ring (15), the fixed shaft (12) being inserted into the fixed seat (11) and fixedly connected to the fixed seat (11), the first bearing (13) being sleeved on the end of the fixed shaft (12) away from the fixed seat (11); characterized in that The guide roller body (14) has a roller portion (141) for sleeved on the outside of the first bearing (13) and a first baffle (142) disposed on the side of the roller portion (141) away from the fixed seat (11). The retaining ring (15) is detachably disposed on the side of the roller part (141) away from the first baffle (142); The fixed shaft (12) is also provided with a mounting assembly (2) for quick assembly and disassembly of the guide roller body (14). The mounting assembly (2) includes a rotating bushing (21), a fixing rod (22), an abutment block (23), an abutment ring (24), and a first compression spring (25). A rotating bushing (21) is disposed inside one end of a guide roller body (14) mounted on a fixed shaft (12), and the rotating bushing (21) is rotatably connected to the fixed shaft (12); The fixing rod (22) is inserted into the inner cavity of the rotating bushing (21) from the outside of the first baffle (142); The abutment blocks (23) are at least two and are arranged opposite to each other at one end of the fixed rod (22) into the rotating bushing (21); The abutment ring (24) is set in the inner cavity of the rotating bushing (21). The axis of the abutment ring (24) is collinear with the axis of the rotating bushing (21). The abutment ring (24) and the rotating bushing (21) are in sliding fit. The inner ring of the abutment ring (24) abuts against the abutment block (23) on the fixed rod (22). The first compression spring (25) is located inside the fixed shaft (12) and sleeved on the outside of the fixed rod (22). The two ends of the first compression spring (25) are fixedly connected to the abutment ring (24) and the rotating shaft sleeve (21) respectively. The first compression spring (25) is used to push the abutment ring (24) towards the abutment block (23) to provide locking force. The abutment block (23) and the fixing rod (22) are in sliding engagement, and the sliding direction of the abutment block (23) is parallel to the radial direction of the fixing rod (22); The mounting assembly (2) also includes a limiting rod (26); The limiting rod (26) is inserted into the fixed rod (22) from the outside of the first baffle (142), and the axis of the limiting rod (26) is collinear with the axis of the fixed rod (22); The limiting rod (26) is inserted into the fixed rod (22) at one end, which is provided with a slanted groove (261) for driving the abutment block (23) to move and a second compression spring (27) connected to the fixed rod (22). The second compression spring (27) is used to reset the limiting rod (26). The end of the abutting block (23) that abuts against the abutting ring (24) is provided with a slope (231); The limiting rod (26) drives the abutment block (23) to extend outward along the radial direction of the fixing rod (22) through the inclined groove (261), so that the abutment block (23) abuts against the inner ring of the abutment ring (24); When the limiting rod (26) moves outward against the force of the second compression spring (27), the abutting block (23) retracts into the fixed rod (22) through the contact between the inclined surface (231) and the abutting ring (24).

2. A guide roller mounting structure according to claim 1, wherein The outer ring of the abutment ring (24) is provided with a slide rail (241). The inner wall of the rotating bushing (21) is provided with a groove (211) that cooperates with the slide rail (241). The abutment ring (24) slides within the rotating bushing (21) through the cooperation of the slide rail (241) and the slide groove (211).

3. A guide roller mounting structure according to claim 1, wherein An oil scraper sleeve (16) is fitted on the outside of the fixed shaft (12). One end of the oil scraper sleeve (16) abuts against the retaining ring (15), and the other end of the oil scraper sleeve (16) is inserted into the fixed seat (11). The top of the fixed seat (11) is provided with an oil injection hole (111), and the interior of the fixed seat (11) is provided with a first passage (112) that communicates with the oil injection hole (111). The other end of the first passage (112) communicates with the interior of the oil scraper sleeve (16).

4. A guide roller mounting structure according to claim 3, wherein The inner wall of the oil scraper sleeve (16) is provided with a scraper (161) spirally arranged along the axis of the oil scraper sleeve (16). The oil scraper sleeve (16) is inserted into the fixed seat (11) and a second bearing (17) is fitted at one end. The first passage (112) is provided with a second passage (113) that is connected to the second bearing (17).

5. A guide roller mounting structure according to any one of claims 1 or 3, wherein A plurality of sliding groups (212) are provided between the rotating bushing (21) and the fixed shaft (12), and the sliding groups (212) are linearly distributed along the axis of the rotating bushing (21); The sliding assembly (212) has a number of balls circumferentially distributed along the axis of the rotating sleeve (21); A guide groove (213) is provided between two adjacent sliding groups (212); The outer side of the fixed shaft (12) is provided with a through groove that extends to the guide groove (213).

6. A guide roller mounting structure according to claim 1, wherein The inner side of the retaining ring (15) is provided with a number of circumferentially distributed tenons (151). The guide roller body (14) is provided with a mortise that cooperates with the tenon (151), and the mortise and tenon (151) are tightly fitted together.

7. A guide roller mounting structure according to claim 4, wherein A positioning ring is provided on the outer side of the retaining ring (15), and the outer wall of the oil scraper sleeve (16) abuts against the inner wall of the positioning ring; The outer wall of the positioning ring is provided with several positioning pins (18) distributed circumferentially along the axis of the retaining ring (15). The positioning pins (18) pass through the outer side of the positioning ring to the outer wall of the oil scraper sleeve (16).

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