Compact bearing anti-backlash structure
By designing a compact bearing clearance structure, high-precision adjustment of bearing clearance is achieved using bearing support components and hydraulic systems, the problems of complex adjustment, low accuracy and high cost in the prior art are solved.
Patent Information
- Application Number
- CN202421870029.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-08-02
AI Technical Summary
In the prior art, the bearing clearance adjustment method is complex, the accuracy is low, and multiple external driving components are required, resulting in increased costs and large space occupancy.
A compact bearing clearance structure is designed to achieve precise adjustment of bearing clearance by providing bearing support components and hydraulic systems using plunger rods and sealing chambers.
It realizes high-precision adjustment of bearing clearance, reduces cost and space occupation, and improves the convenience of maintenance and replacement.
Smart Images
Figure CN222848652U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of auxiliary devices for calenders, in particular to a compact bearing clearance eliminating structure. Background Art
[0002] In the field of calenders, bearings are widely used. In precision parts, eliminating the clearance of bearings is an important factor in ensuring the precision of parts.
[0003] In the prior art, several external drive components are mainly used, and the output end of each drive component is connected to the roller shaft. The multiple drive components simultaneously output thrust along the radial direction of the roller shaft, thereby pressing against the roller shaft to eliminate the bearing clearance of the bearing installed on the roller shaft. This bearing clearance adjustment method is relatively complex and rough, and has low adjustment accuracy. At the same time, since multiple external drive components are required, the cost is increased and a large production space is required. Utility Model Content
[0004] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a compact bearing clearance eliminating structure. By setting a bearing support assembly, the structure is compact, the space occupancy can be reduced, the cost can be effectively controlled, and the difficulty of subsequent maintenance and replacement is low. At the same time, the clearance is adjusted based on a hydraulic system with high clearance adjustment accuracy, and it can be applicable to various forms of calendering equipment.
[0005] The technical solution adopted by the utility model is as follows:
[0006] A compact bearing clearance eliminating structure comprises a roller shaft, and bearing support assemblies are respectively mounted on both ends of the roller shaft;
[0007] The structure of a single bearing support assembly is as follows: it comprises a first bearing assembly and a second bearing assembly arranged and installed on the outer circumferential surface of the roller shaft, the first bearing assembly is closely matched with the first bearing seat, the second bearing assembly is closely matched with the bearing seat assembly, the outer ring of the first bearing seat and the outer ring of the bearing seat assembly are simultaneously matched with an outer bearing seat, a first through hole is opened on the outer bearing seat, a plunger rod is sealed and slidably installed in the first through hole, the working end of the plunger rod extends out of the first through hole and abuts against the first bearing seat;
[0008] An end cover is sealingly mounted on the outer bearing seat, and the end cover covers the first through hole, so that a sealed cavity is formed in the first through hole between the end cover and the plunger rod. By introducing hydraulic oil into the sealed cavity, the plunger rod is pressed against the first bearing seat, thereby simultaneously eliminating the clearance inside the first bearing assembly and the second bearing assembly.
[0009] As a further improvement of the above technical solution:
[0010] The first bearing seat is installed in cooperation with the outer bearing seat through a spacer ring, the inner ring of the spacer ring and the outer ring of the first bearing seat are spaced apart, and the outer ring of the spacer ring is tightly matched with the inner ring of the outer bearing seat.
[0011] The spacer is provided with a second through hole for avoiding the plunger rod.
[0012] The outer bearing seat is provided with a groove for limiting the end cover.
[0013] The first bearing assembly includes a first bearing and a second bearing, and the second bearing assembly includes a third bearing and a fourth bearing.
[0014] The bearing seat assembly includes a second bearing seat and a third bearing seat, the inner ring of the second bearing seat is tightly matched with the outer ring of the third bearing, and the inner ring of the third bearing seat is tightly matched with the outer ring of the fourth bearing.
[0015] The outer ring of the second bearing seat is tightly matched with the inner ring of the outer bearing seat.
[0016] The outer ring of the third bearing seat is tightly matched with the inner ring of the outer bearing seat.
[0017] The first bearing assembly and the second bearing assembly are installed on the outer circumferential surface of the roller shaft in the order of the third bearing, the first bearing, the second bearing and the fourth bearing.
[0018] The plunger rod and the first through hole are sealed and installed via a plurality of sealing rings.
[0019] The beneficial effects of the utility model are as follows:
[0020] The utility model has a compact and reasonable structure and is easy to operate. By arranging multiple bearing seats, multiple groups of bearing assemblies and plunger rods, the clearance of the bearings can be controlled based on the hydraulic system. The bearing clearance can be adjusted before the calendering machine calenders, thereby ensuring that the gap between the rollers remains unchanged during the calendering process and ensuring the thickness consistency of the calendered material. At the same time, the gap adjustment has high precision and good effect, the structure is compact and the use flexibility is high.
[0021] The utility model also has the following advantages:
[0022] (1) In the present invention, by providing a spacer, the installation stability of the second bearing seat and the third bearing seat can be ensured; at the same time, the spacer and the first bearing seat are spaced apart, which can provide a movable space for the small displacement of the first bearing seat when eliminating the internal clearance of the first bearing assembly.
[0023] (2) In the present invention, by monitoring the pressure of the hydraulic oil introduced into the sealed cavity, the bearing clearance can be monitored in real time, thereby performing high-precision roll gap control to ensure the uniformity of the material strip produced by calendering.
[0024] (3) In the present invention, by arranging the third bearing and the fourth bearing on both sides of the first bearing assembly, it can be ensured that the third bearing and the fourth bearing are subjected to uniform force during subsequent clearance adjustment. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a structural schematic diagram of the utility model.
[0026] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.
[0027] Figure 3 It is a schematic diagram after the gap is adjusted in the utility model.
[0028] Among them: 1. first bearing; 2. second bearing; 3. third bearing; 4. fourth bearing; 5. outer bearing seat; 6. plunger rod; 7. spacer; 8. first bearing seat; 9. second bearing seat; 10. third bearing seat; 11. first through hole; 12. second through hole; 13. sealing cavity; 14. end cover; 15. bearing support assembly; 16. roller shaft. DETAILED DESCRIPTION
[0029] The specific implementation of the utility model is described below in conjunction with the accompanying drawings.
[0030] The structure and functions of the utility model are as follows:
[0031] like Figure 1-Figure 3As shown, a compact bearing clearance elimination structure includes a roller shaft 16, and bearing support assemblies 15 are respectively installed at both ends of the roller shaft 16; the structure of a single bearing support assembly 15 is as follows: it includes a first bearing assembly and a second bearing assembly arranged and installed on the outer circumferential surface of the roller shaft 16, the first bearing assembly is tightly matched with the first bearing seat 8, and the second bearing assembly is tightly matched with the bearing seat assembly, and the outer ring of the first bearing seat 8 and the outer ring of the bearing seat assembly are simultaneously installed with an outer bearing seat 5, and a first through hole 11 is opened on the outer bearing seat 5, and a plunger rod 6 is sealed and slidably installed in the first through hole 11, and the working end of the plunger rod 6 extends out of the first through hole 11 and abuts against the first bearing seat 8; an end cover 14 is sealed and installed on the outer bearing seat 5, and the end cover 14 covers the first through hole 11, so that a sealed cavity 13 is formed in the first through hole 11 between the end cover 14 and the plunger rod 6, and hydraulic oil is introduced into the sealed cavity 13, so that the plunger rod 6 presses against the first bearing seat 8, thereby eliminating the clearance inside the first bearing assembly and the second bearing assembly at the same time. By providing multiple bearing seats, multiple bearing assemblies and plunger rods 6, the plunger rod 6 can be extended from the first through hole 11 and pressed against the first bearing seat 8, thereby eliminating the clearance of the bearing in the first bearing assembly matched with the first bearing seat 8; at the same time, the thrust generated by the plunger rod 6 on the outer ring of the first bearing seat 8 is transmitted to the roller shaft 16 through the first bearing assembly and the inner ring of the first bearing seat 8, and the roller shaft 16 then transmits the thrust to the inner ring of the bearing seat assembly, thereby pressing the second bearing assembly through the inner ring of the bearing seat assembly, thereby eliminating the clearance in the second bearing assembly.
[0032] The first bearing seat 8 is installed in cooperation with the outer bearing seat 5 through the spacer 7, the inner ring of the spacer 7 and the outer ring of the first bearing seat 8 are spaced apart, and the outer ring of the spacer 7 and the inner ring of the outer bearing seat 5 are tightly matched. By providing the spacer 7, the second bearing seat 9 and the third bearing seat 10 are separated in cooperation with the first bearing seat 8, so as to ensure the installation stability of the second bearing seat 9 and the third bearing seat 10; at the same time, the spacer 7 and the first bearing seat 8 are spaced apart, so as to provide a movable space for the slight displacement of the first bearing seat 8 when eliminating the internal clearance of the first bearing assembly.
[0033] The spacer 7 is provided with a second through hole 12 for avoiding the plunger rod 6. The second through hole 12 corresponds to the first through hole 11, and the plunger rod 6 extends out of the first through hole 11 and passes through the second through hole 12 to press against the first bearing seat 8.
[0034] The outer bearing seat 5 is provided with a groove for limiting the end cover 14. The groove is arranged concentrically with the first through hole 11 and is used to install the end cover 14; a sealing groove is provided in the groove for installing a sealing assembly, thereby achieving a sealed installation between the outer bearing seat 5 and the end cover 14.
[0035] The first bearing assembly includes a first bearing 1 and a second bearing 2, and the second bearing assembly includes a third bearing 3 and a fourth bearing 4; the first bearing assembly and the second bearing assembly are arranged on the outer circumferential surface of the roller shaft 16 in the order of the third bearing 3, the first bearing 1, the second bearing 2, and the fourth bearing 4. In the utility model, a total of four bearings are arranged in groups of two, and the third bearing 3 and the fourth bearing 4 in the second bearing assembly are arranged on both sides of the first bearing assembly, respectively, which can ensure that the third bearing 3 and the fourth bearing 4 are evenly stressed during the subsequent gap adjustment.
[0036] The bearing seat assembly includes a second bearing seat 9 and a third bearing seat 10, the inner ring of the second bearing seat 9 is tightly matched with the outer ring of the third bearing 3, and the inner ring of the third bearing seat 10 is tightly matched with the outer ring of the fourth bearing 4. Since the third bearing 3 and the fourth bearing 4 are arranged separately, the second bearing seat 9 mounted in cooperation with the third bearing 3 and the third bearing seat 10 mounted in cooperation with the fourth bearing 4 are respectively provided.
[0037] The outer ring of the second bearing seat 9 is tightly matched with the inner ring of the outer bearing seat 5; the outer ring of the third bearing seat 10 is tightly matched with the inner ring of the outer bearing seat 5. The first bearing seat 8, the second bearing seat 9 and the third bearing seat 10 are all arranged inside the outer bearing seat 5;
[0038] The second bearing seat 9 and the third bearing seat 10 are directly and tightly mounted with the outer bearing seat 5; the first bearing seat 8 and the spacer ring 7 are installed to avoid air.
[0039] A plurality of sealing rings are used to seal the plunger rod 6 and the first through hole 11. By sliding and sealing the plunger rod 6 and the first through hole 11, it is possible to prevent the hydraulic oil in the sealed cavity 13 from leaking to the outside.
[0040] In addition, in the utility model, an oil supply passage (not shown in the drawings) can be opened on the end cover 14 or the outer bearing seat 15, the oil supply passage is connected to the sealing cavity 13, and an external oil pump pumps hydraulic oil into the sealing cavity 13 through the oil supply passage.
[0041] The working process of the utility model is as follows:
[0042] Before the calender is calendered, the bearing clearance is first adjusted to eliminate the internal bearing clearance and prevent the roller shaft 16 from moving; the specific steps of the clearance adjustment are as follows:
[0043] For a single bearing support assembly 15, firstly, hydraulic oil is introduced into the sealing cavity 13, so that the plunger rod 6 extends out of the first through hole 11 and presses against the outer ring of the first bearing seat 8;
[0044] like Figure 3 As shown, at this time, the first bearing seat 8 drives the first bearing assembly downward (i.e. Figure 3The direction indicated by the arrow in the middle) eliminates the first bearing 1 and the second bearing 2 side (located at Figure 3 The clearance of the upper side of the middle roller shaft 16);
[0045] At the same time, the first bearing seat 8 generates a thrust on the roller shaft 16 through the first bearing assembly (the thrust direction is the same as the Figure 3 The arrows in the middle point in the same direction), thereby simultaneously driving the inner rings of the third bearing 3 and the fourth bearing 4 to move through the roller shaft 16, thereby simultaneously eliminating the third bearing 3 and the fourth bearing 4 on one side (located at Figure 3 The clearance of the lower side of the middle roller shaft 16);
[0046] The first bearing assembly and the second bearing assembly act simultaneously to prevent the roller shaft 16 from moving, thereby ensuring that the roller gaps between the multiple roller shafts 16 remain unchanged during the calendering process of the calender.
[0047] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.
Claims
1. A compact bearing clearance eliminating structure, comprising a roller shaft (16), characterized in that: The two ends of the roller shaft (16) are respectively equipped with bearing support assemblies (15); The structure of a single bearing support assembly (15) is as follows: it comprises a first bearing assembly and a second bearing assembly arranged and mounted on the outer circumferential surface of a roller shaft (16); the first bearing assembly is tightly matched with a first bearing seat (8); the second bearing assembly is tightly matched with a bearing seat assembly; the outer ring of the first bearing seat (8) and the outer ring of the bearing seat assembly are simultaneously matched and mounted with an outer bearing seat (5); a first through hole (11) is formed on the outer bearing seat (5); a plunger rod (6) is sealed and slidably mounted in the first through hole (11); a working end of the plunger rod (6) extends out of the first through hole (11) and abuts against the first bearing seat (8); An end cover (14) is sealedly mounted on the outer bearing seat (5), and the end cover (14) covers the first through hole (11), so that a sealed cavity (13) is formed in the first through hole (11) between the end cover (14) and the plunger rod (6). By introducing hydraulic oil into the sealed cavity (13), the plunger rod (6) is pressed against the first bearing seat (8), thereby simultaneously eliminating the clearance inside the first bearing assembly and the second bearing assembly.
2. A compact bearing clearance eliminating structure as claimed in claim 1, characterized in that: The first bearing seat (8) is installed in cooperation with the outer bearing seat (5) through a spacer (7), the inner ring of the spacer (7) and the outer ring of the first bearing seat (8) are spaced apart, and the outer ring of the spacer (7) and the inner ring of the outer bearing seat (5) are tightly matched.
3. A compact bearing clearance eliminating structure as claimed in claim 2, characterized in that: The spacer (7) is provided with a second through hole (12) for avoiding the plunger rod (6).
4. A compact bearing clearance eliminating structure as claimed in claim 1, characterized in that: The outer bearing seat (5) is provided with a groove for limiting the position of the end cover (14).
5. A compact bearing clearance eliminating structure as claimed in claim 1, characterized in that: The first bearing assembly comprises a first bearing (1) and a second bearing (2), and the second bearing assembly comprises a third bearing (3) and a fourth bearing (4).
6. A compact bearing clearance eliminating structure as claimed in claim 5, characterized in that: The bearing seat assembly comprises a second bearing seat (9) and a third bearing seat (10), wherein the inner ring of the second bearing seat (9) is tightly matched with the outer ring of the third bearing (3), and the inner ring of the third bearing seat (10) is tightly matched with the outer ring of the fourth bearing (4).
7. A compact bearing clearance eliminating structure as claimed in claim 6, characterized in that: The outer ring of the second bearing seat (9) is tightly matched with the inner ring of the outer bearing seat (5).
8. A compact bearing clearance eliminating structure as claimed in claim 6, characterized in that: The outer ring of the third bearing seat (10) is tightly matched with the inner ring of the outer bearing seat (5).
9. A compact bearing clearance eliminating structure as claimed in claim 5, characterized in that: The first bearing assembly and the second bearing assembly are installed on the outer circumferential surface of the roller shaft (16) in the order of the third bearing (3), the first bearing (1), the second bearing (2), and the fourth bearing (4).
10. A compact bearing clearance eliminating structure as claimed in claim 1, characterized in that: The plunger rod (6) and the first through hole (11) are sealed and installed via a plurality of sealing rings.