Anti-slip device

By using the anti-offset device of the support wheel device and the track device on the cooler grate, the track grooves combined with the cylindrical surface, conical surface and arc surface are used to solve the problem of offset during operation of the grate bed, and a lower Wear and longer spare parts replacement cycles ensure stable and safe operation of the cooler.

CN112644994BActive Publication Date: 2025-02-14NANJING XIPU HEAVY MASCH CO LTD
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Patent Information

Application Number
CN202110122476.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-01-29
Publication Date
2025-02-14
Estimated Expiration
2041-01-29

AI Technical Summary

Technical Problem

The existing cooler grate is prone to deviation when running, resulting in severe friction, collision, etc., causing material leakage and irreparable damage to the grate bed. The structure of the anti-radical device is complicated, difficult to install and adjust, and severe wear. Spare parts Replace frequently.

Method used

The anti-dissection device including a bracket device and a track device is adopted. The bracket device is composed of a support, a support shaft and a bracket wheel. The bracket wheel is equipped with an annular track groove, and the contact surface of the track groove is a cylindrical surface, a conical surface and Arc surface combination is used to support the track device to prevent it from being offset during reciprocating operation.

Benefits of technology

It effectively prevents the deviation of the grate bed during operation, reduces wear, extends the replacement cycle of spare parts, improves the stability and safety of the cooler, and ensures long-term normal production.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention discloses an anti-deviation device, comprising a roller device (1) and a track device (2), wherein the roller device (1) comprises a support, a support shaft (3) and a roller (4), wherein both ends of the support shaft (3) are supported by the support, the roller (4) is arranged on the support shaft (3) and can rotate on the support shaft (3), and the roller (4) is provided with an annular track groove, wherein the groove bottom of the track groove is a cylindrical surface (5), the groove wall of the track groove is a conical surface (6), and the groove bottom and the groove wall of the track groove are connected to a first arc surface (7), the first arc surface (7) connects the cylindrical surface (5) and the conical surface (6) and is tangent to the cylindrical surface (5) and the conical surface (6), and the track groove is used to support the track device (2), and the track device (2) rolls back and forth on the roller (4) in a use state. The beneficial effect of the present invention is that the present invention solves the technical defect in the prior art that the grate bed deviates when performing reciprocating linear operation.
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Description

Technical Field

[0001] The invention relates to an anti-deviation device. Background Art

[0002] Cooler is a very important equipment in cement production. It undertakes the important and complex process of cooling clinker, transporting clinker and heat recovery. It plays a decisive role in energy saving in cement production.

[0003] At present, the domestic general use is to use guide wheel anti-deviation devices. This type of device has a complex structure and is difficult to install and adjust. There is a speed difference between the linear speed of the guide wheel and the guide plate, which causes serious wear and tear. The replacement of spare parts is relatively frequent. After the guide plate is worn, it is also difficult to adjust the gap, and the range error of the gap control is also relatively large. If the lateral gap between the guide wheel and the guide plate cannot be discovered and adjusted in time during production, the grate bed will cause serious deviation, and the anti-deviation effect will be greatly reduced or even completely fail.

[0004] If the cooler grate bed deviates during operation, there will be serious friction and collision between the grate rows, resulting in leakage, irreparable damage to the grate bed, etc. The entire cement burning and cooling equipment must be stopped during maintenance, which will cause serious waste of resources. Therefore, it is very important to prevent the cooler grate bed from malfunctioning and deviating during operation. Summary of the invention

[0005] The purpose of the present invention is to provide an anti-deviation device to solve the technical defect in the prior art that the grate bed deviates when performing reciprocating linear operation.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is: an anti-deviation device, including a roller device and a track device, the roller device including a support, a support shaft and a roller, both ends of the support shaft are supported by the support, the roller is arranged on the support shaft and can rotate on the support shaft, an annular track groove is opened on the roller, the groove bottom of the track groove is a cylindrical surface, the groove wall of the track groove is a conical surface, the connection between the groove bottom and the groove wall of the track groove is a first arc surface, the first arc surface connects the cylindrical surface and the conical surface and is tangent to the cylindrical surface and the conical surface, the track groove is used to support the track device, and the track device rolls back and forth on the roller when in use. In the present invention, a track groove is provided on the supporting wheel, and the track device cooperates with the track to limit the track device in the axial direction of the supporting wheel to prevent the track device from shifting during reciprocating operation. Since the grate bed installed on the track device can only move reciprocatingly with the movement of the track device, under the premise that the track device cannot shift, the grate bed will not shift during reciprocating linear operation. In the present invention, the track groove is composed of a cylindrical surface, a conical surface and an arc surface, and the applicable track device range is wider, thereby improving the versatility of the present invention.

[0007] As a further improvement of the present invention, the track device includes a guide rail and a connecting member, the guide rail is arranged at the bottom of the connecting member, the guide rail is supported by a supporting wheel and rolls relative to the supporting wheel on the supporting wheel when in use, the connecting member is used to be connected to the grate bed when in use, the grate bed reciprocates in the horizontal direction with the reciprocating rolling of the track device, the bottom surface of the guide rail is a plane, the cylindrical surface of the track groove supports the plane of the bottom of the guide rail when in use, the side surfaces on both sides of the guide rail are inclined surfaces, the connection between the plane and the inclined surface of the guide rail is a second arc surface, and the second arc surface is tangent to the plane and the inclined surface. The supporting wheel of the supporting wheel device in the present invention is composed of a cylindrical surface, a conical surface and an arc chamfered surface, and the guide rail contact surface in the guide rail device is a combination of a cylindrical surface, a conical surface and an arc chamfered surface that fits the supporting wheel device. The supporting wheel device and the track device are assembled vertically. This structural form avoids the process of periodic clearance adjustment and inspection in a short period of time in the original combination of a single supporting wheel and a single blocking wheel, saves human resources, reduces maintenance workload, and integrates the supporting wheel and the blocking wheel in the same structure, which saves space and is conducive to the installation of other parts and one-step optimization, so that human resources can be more fully utilized.

[0008] As a further improvement of the present invention, the supporting wheel is rotatably mounted on the supporting shaft using two bearings, and a positioning sleeve is provided at each end of the supporting shaft, and the ends of the inner rings of the two bearings facing each other are against the shoulder of the supporting shaft, and the ends of the inner rings of the bearings away from each other are against one end of the positioning sleeve, and the other end of the positioning sleeve is against the support. The present invention uses bearings to mount the supporting wheel on the supporting shaft, which facilitates the relative rotation of the supporting wheel and the supporting shaft. The present invention provides a positioning sleeve with one end against the inner ring of the bearing to axially position the inner ring of the bearing, prevent the bearing from axially moving during use, and improve the stability of the present invention.

[0009] As a further improvement of the present invention, it also includes two end covers, which are respectively sleeved on the two positioning sleeves and detachably installed at the two ends of the supporting wheel, and a retaining ring is respectively provided on the opposite sides of the two end covers, which extend into the supporting wheel and respectively abut against the outer rings of the two bearings. The present invention provides an end cover, which is installed on the supporting wheel to realize the installation of the end cover, and the retaining ring on the end cover abuts against the outer ring of the bearing to axially position the outer ring of the bearing, further improving the stability of the use of the present invention.

[0010] As a further improvement of the present invention, the end cover is detachably mounted on both ends of the supporting wheel by using a plurality of bolts. The present invention uses bolts to be mounted on the ends of the supporting wheel, which facilitates the installation and removal of the end cover.

[0011] As a further improvement of the present invention, an annular groove is provided on the inner ring surface of the end cap for fitting with the positioning sleeve, and a sealing ring is provided in the annular groove. The present invention provides a sealing ring to enhance the sealing performance of the present invention, and provides an annular groove to facilitate the installation of the sealing ring.

[0012] As a further improvement of the present invention, an annular groove is provided on the cylindrical surface of the track groove, an oiling hole is provided in the annular groove along the radial direction of the supporting wheel, and an oiling nozzle is installed in the oiling hole for adding lubricating oil or grease. The present invention is provided with an oiling nozzle, which is convenient for lubricating the supporting wheel, and an annular groove is provided on the track groove, and the oiling nozzle is located in the annular groove, which can effectively prevent the oiling nozzle from interfering with the movement of the track device.

[0013] As a further improvement of the present invention, the support includes a support base plate and two support side plates, the two support side plates are parallel, the bottom ends of the two support side plates are respectively mounted on the two ends of the support base plate and the support side plates are perpendicular to the support base plate, and the two ends of the support shaft are respectively mounted on the two support side plates. The support base plate in the present invention is used to install the support on a fixed object when in use, and the support side plates are used to support the support shaft.

[0014] As a further improvement of the present invention, a pressing plate is provided on the top of each of the two supporting side plates, and the pressing plate is detachably mounted on the supporting side plates, and is used to detachably mount the supporting shaft on the supporting side plates. The present invention provides a pressing plate, and through the detachable mounting of the pressing plate and the supporting side plates, the two ends of the supporting shaft are mounted between the pressing plate and the supporting side plates, thereby realizing the detachable mounting of the supporting side plates and the supporting shaft.

[0015] As a further improvement of the present invention, a semicircular lower fixing groove is formed on the top of the supporting side plate, a semicircular upper fixing groove is formed on the bottom of the pressing plate, and the end of the supporting shaft is located in a fixing hole formed by the upper fixing groove and the lower fixing groove. After the pressing plate is installed on the supporting side plate, the upper fixing groove on the pressing plate and the lower fixing groove on the supporting side plate are spliced ​​into a circular fixing hole, and the supporting shaft is located in the fixing hole to achieve fixation.

[0016] In summary, the beneficial effects of the present invention are as follows: the contact surface (i.e., the force-bearing surface) of the anti-deviating roller structure of the present invention is a cylindrical surface and a plane, and the anti-deviating structure relies on the two side positions of the roller device and the track device. If the sides of the roller device and the track device are perpendicular to the supporting surface, the sides of the track device and the roller device will be worn. The reason is that under the same angular velocity, the linear velocities on circles of different radii are different. When there is a speed difference, unnecessary wear will occur, resulting in a deviation in the movement. The present invention uses arc contact at this position. Once a deviation occurs and the linear velocities are different, the roller device and the track device will generate a force opposite to the deviation direction to return it to normal movement. In addition, the relative movement of the two in the anti-deviating roller structure of the present invention will not produce a speed difference for a long time, no relative sliding friction will be generated, the wear is small, the spare parts replacement cycle is extended, and the forces on both sides of the arc structure are equal, which can ensure that the grate bed does not deviate during operation and runs in a straight line.

[0017] The contact between the track device and the supporting roller device is a combination of cylindrical surface, conical surface and arc chamfered surface. This device will not produce speed difference like the guide wheel device. It only has rolling friction and no relative sliding friction. The force surfaces on both sides of the contact surface are equal. There will be no left and right swing during operation, which effectively prevents the grate bed from shifting. The supporting roller and guide rail are made of wear-resistant materials to minimize wear. The anti-shift supporting roller structure designed greatly reduces the replacement rate of spare parts and extends the replacement cycle, which maximizes the guarantee of long-term safe operation of the cooler, maintains long-term normal production, and creates higher profits for the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the present invention.

[0019] Figure 2 yes Figure 1 AA section view.

[0020] Figure 3 It is a front view of the supporting wheel device in the present invention.

[0021] Figure 4 yes Figure 3 Middle BB section view.

[0022] Figure 5 It is a left side view of the track device in the present invention.

[0023] Among them: 1. supporting roller device; 2. track device; 3. supporting shaft; 4. supporting roller; 5. cylindrical surface; 6. conical surface; 7. first arc surface; 8. guide rail; 9. connecting piece; 10. plane; 11. inclined surface; 12. second arc surface; 13. positioning sleeve; 14. bearing; 15. shoulder; 16. end cover; 17. annular groove; 18. sealing ring; 19. annular groove; 20. oil filling hole; 21. oil filling nozzle; 22. supporting bottom plate; 23. supporting side plate; 24. pressure plate. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings.

[0025] Example 1

[0026] like Figure 1 and Figure 2The anti-deviation device shown comprises a supporting roller device 1 and a track device 2, wherein the supporting roller device 1 comprises a support, a support shaft 3 and a supporting roller 4, wherein both ends of the supporting shaft 3 are supported by the support, the supporting roller 4 is arranged on the supporting shaft 3 and can rotate on the supporting shaft 3, and an annular track groove is provided on the outer surface of the supporting roller 4, wherein the groove bottom of the track groove is a cylindrical surface 5, and the groove wall of the track groove is a conical surface 6, so that the opening width of the track groove is greater than the width of the groove bottom, and the groove bottom and the groove wall of the track groove are connected to a first arc surface 7, and the first arc surface 7 connects the cylindrical surface 5 and the conical surface 6 and is tangent to the cylindrical surface 5 and the conical surface 6, as shown in FIG. Figure 3 and Figure 4 As shown, the track groove is used to support the track device 2. When in use, the track device 2 rolls back and forth on the supporting wheel 4, so that the track device 2 moves back and forth in the horizontal direction.

[0027] The track device 2 in this embodiment includes a guide rail 8 and a connecting member 9. Figure 5 As shown, the guide rail 8 is arranged at the bottom of the connecting member 9, the guide rail 8 is supported by the supporting wheel 4 and rolls on the supporting wheel 4 relative to the supporting wheel 4 when in use. The connecting member 9 in this embodiment is a plate-like structure with a square cross-section. The length of the guide rail 8 is equal to the length of the connecting member 9. The guide rail 8 and the connecting member 9 are preferably made of one piece in this embodiment. The connecting member 9 is used to connect with the grate bed when in use. In this embodiment, a connecting through hole is respectively provided at four right angles of the connecting member 9, which runs through the upper and lower parts thereof, for detachable connection with the grate bed by bolts. The grate bed reciprocates in the horizontal direction with the reciprocating rolling of the track device 2, so as to realize the forward and backward movement of the grate bed. In this embodiment, the bottom surface of the guide rail 8 is a plane 10. In the use state, the cylindrical surface 5 of the track groove supports the plane 10 at the bottom of the guide rail 8, and the side surfaces on both sides of the guide rail 8 are inclined surfaces 11. The connection between the plane 10 at the bottom of the guide rail 8 and the inclined surface 11 is a second arc surface 12, and the second arc surface 12 is tangent to the plane 10 and the inclined surface 11.

[0028] The supporting wheel 4 in this embodiment is rotatably mounted on the support shaft 3 using two bearings 14. The diameter of the middle part of the support shaft 3 is slightly larger than the diameter at both ends. A shoulder 15 is formed at the place where the diameter of the support shaft 3 decreases from the middle to the two ends. A positioning sleeve 13 is provided at each end of the support shaft 3. The inner rings of the two bearings 14 facing each other abut against the shoulder 15 of the support shaft 3, and the inner rings of the bearings 14 away from each other abut against one end of the positioning sleeve 13, and the other end of the positioning sleeve 13 abuts against the support. The shoulder 15 of the support shaft 3 and the positioning sleeve 13 axially position the inner ring of the bearing 14 to prevent the bearing 14 from axially moving, thereby improving the overall stability of this embodiment.

[0029] In this embodiment, two end covers 16 are preferably provided, and the two end covers 16 are respectively sleeved on the two positioning sleeves 13 and detachably installed at the two ends of the supporting wheel 4. A retaining ring is respectively provided on the opposite sides of the two end covers 16. The retaining ring in this embodiment is integrally formed with the end cover 16, and the retaining ring extends into the supporting wheel 4 and respectively abuts against the ends of the outer rings of the two bearings 14 that are away from each other, so as to axially limit the outer rings of the bearings 14. The end cover 16 in this embodiment is detachably installed at the two ends of the supporting wheel 4 by using multiple bolts, and the multiple bolts are evenly distributed along the circumferential direction. After passing through the end cover 16, the bolts cooperate with the end surface threads of the supporting wheel 4 to realize the detachable installation of the end cover 16 and the supporting wheel 4.

[0030] The support in this embodiment includes a supporting base plate 22 and two supporting side plates 23. The two supporting side plates 23 are parallel, and the bottom ends of the two supporting side plates 23 are respectively mounted on the two ends of the supporting base plate 22 and the supporting side plates 23 are perpendicular to the supporting base plate 22. The supporting side plates 23 and the supporting base plate 22 in this embodiment can be detachably mounted with bolts, or the bottoms of the supporting side plates 23 can be welded to the supporting base plate 22, or the supporting base plate 22 and the supporting side plates 23 can be integrally formed, and the two ends of the supporting shaft 3 are respectively mounted on the two supporting side plates 23. To facilitate the installation of the supporting shaft 3 in this embodiment, this embodiment uses bolts to detachably mount the supporting side plates 23 on the supporting base plate 22.

[0031] Example 2

[0032] This embodiment is a further improvement made on the basis of the embodiment 1. Compared with the embodiment 1, the inner ring surface of the end cover 16 used to fit with the outer surface of the positioning sleeve 13 is provided with an annular groove 17 in this embodiment, and a sealing ring 18 is arranged in the annular groove 17. The sealing ring 18 fits with the outer surface of the positioning sleeve 13 in the use state to enhance the sealing performance of the connection between the end cover 16 and the positioning sleeve 13. The sealing ring 18 in this embodiment is made of rubber material for easy installation. The structure of the rest of this embodiment is the same as that of the embodiment 1, and the details can be referred to the embodiment 1, and this embodiment will not be repeated.

[0033] Example 3

[0034] This embodiment is a further improvement made on the basis of embodiment 1. Compared with embodiment 1, this embodiment has an annular groove 19 on the cylindrical surface 5 of the track groove, and an oiling hole 20 is opened in the annular groove 19 along the radial direction of the supporting wheel 4. An oiling nozzle 21 is installed in the oiling hole 20 for adding lubricating oil or grease. The number of oiling holes 20 in this embodiment can be one, two or more, and an oiling nozzle 21 matched with its thread is installed in each oiling hole 20. Lubricating oil or grease is injected into the supporting wheel 4 through the oiling nozzle 21 to lubricate the connection between the supporting wheel 4 and the support shaft 3 and the bearing 14. The structure of the rest of this embodiment is the same as that of embodiment 1, and the details can be referred to embodiment 1, and this embodiment will not be repeated.

[0035] Example 4

[0036] This embodiment is a further improvement made on the basis of embodiment 2. Compared with embodiment 2, this embodiment has an annular groove 19 on the cylindrical surface 5 of the track groove, and an oiling hole 20 is opened in the annular groove 19 along the radial direction of the supporting wheel 4. An oiling nozzle 21 is installed in the oiling hole 20 for adding lubricating oil or grease. The number of oiling holes 20 in this embodiment can be one, two or more, and an oiling nozzle 21 matched with its thread is installed in each oiling hole 20. Lubricating oil or grease is injected into the supporting wheel 4 through the oiling nozzle 21 to lubricate the connection between the supporting wheel 4 and the support shaft 3 and the bearing 14. The structure of the rest of this embodiment is the same as that of embodiment 2, and the details can be referred to embodiment 2, and this embodiment will not be repeated.

[0037] Example 5

[0038] The present embodiment is a further improvement on the basis of the embodiment 1. Compared with the embodiment 1, a pressure plate 24 is provided on the top of each of the two support side plates 23 in the present embodiment. The pressure plate 24 is detachably mounted on the support side plate 23 by two bolts passing through the pressure plate 24 from top to bottom and cooperating with the support side plate threads, and is used to detachably mount the support shaft 3 on the support side plate 23. In the present embodiment, the two bolts are symmetrically arranged on both sides of the support shaft 3. The support side plate 23 in the present embodiment is fixedly connected to the support bottom plate 22 (such as welding, etc.), or is integrally formed.

[0039] In this embodiment, a semicircular lower fixing groove is preferably opened at the top of the support side plate 23, and a semicircular upper fixing groove is opened at the bottom of the pressure plate 24. The end of the support shaft 3 is located in the fixing hole formed by the upper fixing groove and the lower fixing groove. In this embodiment, the aperture of the fixing hole formed by the upper fixing groove and the lower fixing groove is equal to the diameter of the two ends of the support shaft 3.

[0040] The structures of the rest of the present embodiment are the same as those of the embodiment 1, and the details can be referred to the embodiment 1, and the present embodiment will not be described in detail. It should be understood that any of the embodiments 2 to 4 in the present application can be further improved as in the present embodiment, and the improvements made on the basis of the above embodiments 2 to 4 as in the present embodiment are also improvements within the protection scope of the present application.

[0041] The parts not specifically described in the above description are all prior art, or can be implemented by prior art. Moreover, the specific implementation cases described in the present invention are only preferred implementation cases of the present invention, and are not used to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent scope of the present invention should be regarded as the technical scope of the present invention.

Claims

1. Anti-deviation device, characterized by: The invention comprises a roller device (1) and a track device (2), wherein the roller device (1) comprises a support, a support shaft (3) and a roller (4), wherein both ends of the support shaft (3) are supported by the support, the roller (4) is arranged on the support shaft (3) and can rotate on the support shaft (3), and an annular track groove is formed on the roller (4), wherein the groove bottom of the track groove is a cylindrical surface (5), the groove wall of the track groove is a conical surface (6), and the groove bottom and the groove wall of the track groove are connected to a first arc surface (7), the first arc surface (7) connects the cylindrical surface (5) and the conical surface (6) and is tangent to the cylindrical surface (5) and the conical surface (6), and the track groove is used to support the track device (2), and the track device (2) rolls back and forth on the roller (4) when in use; The track device (2) comprises a guide rail (8) and a connecting member (9), wherein the guide rail (8) is arranged at the bottom of the connecting member (9), the guide rail (8) is supported by a supporting wheel (4) and rolls on the supporting wheel (4) relative to the supporting wheel (4) when in use, the connecting member (9) is used to connect with a grate bed when in use, and the grate bed reciprocates in the horizontal direction as the track device (2) rolls back and forth, the bottom surface of the guide rail (8) is a plane (10), the cylindrical surface (5) of the track groove supports the plane (10) at the bottom of the guide rail (8) when in use, the side surfaces on both sides of the guide rail (8) are inclined surfaces (11), the connection between the plane (10) and the inclined surface (11) of the guide rail (8) is a second arc surface (12), and the second arc surface (12) is tangent to the plane (10) and the inclined surface (11); The support comprises a support base plate (22) and two support side plates (23), the two support side plates (23) are parallel, the bottom ends of the two support side plates (23) are respectively mounted on the two ends of the support base plate (22), and the support side plates (23) are perpendicular to the support base plate (22), the two ends of the support shaft (3) are respectively mounted on the two support side plates (23), the tops of the two support side plates (23) are each provided with a pressing plate (24), the pressing plate (24) is detachably mounted on the support side plates (23), and is used for detachably mounting the support shaft (3) on the support side plates (23), the top of the support side plates (23) is provided with a semicircular lower fixing groove, the bottom of the pressing plate (24) is provided with a semicircular upper fixing groove, and the end of the support shaft (3) is located in a fixing hole formed by the upper fixing groove and the lower fixing groove; An annular groove (19) is formed on the cylindrical surface (5) of the track groove, an oil filling hole (20) is formed in the annular groove (19) along the radial direction of the supporting wheel (4), and an oil filling nozzle (21) is installed in the oil filling hole (20) for adding lubricating oil or grease.

2. The anti-deviation device according to claim 1, characterized in that: The supporting wheel (4) is rotatably mounted on the supporting shaft (3) by means of two bearings (14). A positioning sleeve (13) is sleeved on each of the two ends of the supporting shaft (3). The ends of the inner rings of the two bearings (14) facing each other abut against the shaft shoulder (15) of the supporting shaft (3). The ends of the inner rings of the bearings (14) away from each other abut against one end of the positioning sleeve (13), and the other end of the positioning sleeve (13) abuts against the support.

3. The anti-deviation device according to claim 2, characterized in that: It also includes two end covers (16), which are respectively sleeved on the two positioning sleeves (13) and detachably mounted on the two ends of the supporting wheel (4). A retaining ring is respectively provided on one side of the two end covers (16) facing each other, and the retaining ring extends into the supporting wheel (4) and respectively abuts against the outer rings of the two bearings (14).

4. The anti-deviation device according to claim 3, characterized in that: The end covers (16) are detachably mounted on both ends of the supporting wheel (4) using a plurality of bolts.

5. The anti-deviation device according to claim 3, characterized in that: An annular groove (17) is formed on the inner annular surface of the end cover (16) for fitting with the positioning sleeve (13), and a sealing ring (18) is arranged in the annular groove (17).

Citation Information

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