A combined bearing

Abstract

The present invention discloses a combined bearing, which specifically relates to the technical field of bearings, and comprises: a combined bearing outer ring and a combined bearing inner ring, wherein the inner sides of the two blocking rings are provided with a clamping mechanism for disassembling and assembling the blocking rings, the outer sides of the two blocking rings are provided with a sealing mechanism for reducing friction, a flow guiding mechanism for guiding lubricating oil is provided on one side of one of the blocking rings on the outer ring of the combined bearing, and a clamping mechanism for clamping a shaft rod is provided on the inner ring of the combined bearing. The technical effects and advantages of the present invention are as follows: by providing the clamping mechanism, it is convenient to quickly disassemble the blocking ring; by providing the sealing mechanism, not only the sealing effect of the blocking ring after installation is improved, but also the friction between the blocking ring and the combined bearing is reduced; by providing the flow guiding mechanism, it is convenient to apply lubricating oil to the inside of the combined bearing, thereby greatly improving the convenience of operation; by providing the clamping mechanism, it is convenient to perform a tight clamping operation between the inner ring of the combined bearing and the shaft rod.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and more particularly to a combined bearing. Background Art

[0002] With the development of industrial technology, some mechanical equipment cannot do without the use of combined bearings in their work. In the combined bearing industry, there are many types of combined bearings. Combined bearings are widely used in various machines, and combined bearings play a key role.

[0003] In order to increase the service life of the existing combined bearings, blocking rings are usually set on both sides to protect the ball bearings inside and prevent external dust from entering. However, the existing blocking rings are installed by clamping and riveting, which are not easy to disassemble after installation, resulting in troublesome maintenance and repair operations inside the combined bearings in the later stage. After the blocking rings are installed, friction will be generated between the combined bearings and the blocking rings during use, resulting in reduced use effect of the combined bearings. When the existing combined bearings need to be lubricated, it is usually necessary to remove the blocking rings on both sides before adding lubricating oil to the combined bearings, resulting in cumbersome operation. When the existing combined bearings are connected to the shaft rod, anti-slip tape is usually wrapped around the side wall of the shaft rod, and then inserted into the combined bearing to complete the fixation. However, when the shaft rod rotates too fast, the shaft rod and the inner ring of the combined bearing are still prone to sliding, resulting in low stability. Summary of the invention

[0004] Technical issues solved:

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a combined bearing to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: comprising: a combined bearing outer ring and a combined bearing inner ring, the combined bearing inner ring is located inside the combined bearing outer ring, a plurality of balls are arranged in a ring shape between the combined bearing outer ring and the combined bearing inner ring, blocking rings are arranged on both sides of the plurality of balls between the combined bearing outer ring and the combined bearing inner ring, a clamping mechanism for disassembling and assembling the blocking rings is arranged on the inner sides of the two blocking rings, a sealing mechanism for reducing friction is arranged on the outer sides of the two blocking rings, a diversion mechanism for diverting lubricating oil is arranged on one side of one of the blocking rings on the combined bearing outer ring, and a clamping mechanism for clamping the shaft rod is arranged on the combined bearing inner ring.

[0007] In a preferred embodiment, the inner side wall of the outer ring of the combined bearing is provided with a No. 2 rolling groove at a position relative to multiple balls, and the outer side wall of the inner ring of the combined bearing is provided with a No. 1 rolling groove at a position relative to multiple balls, and multiple balls are rollingly connected with the No. 1 rolling groove and the No. 2 rolling groove, and the clamping mechanism includes a receiving groove provided on both sides of the blocking ring, and positioning rods are slidably connected in the two receiving grooves, and one end of the positioning rods is fixedly connected to a No. 1 spring, and the end of the No. 1 spring away from the positioning rod is fixedly connected to the inner side wall of the receiving groove, and positioning holes are penetrated through the surface of the inner ring of the combined bearing at the positions relative to multiple positioning rods, and the ends of multiple positioning rods away from the No. 1 spring are plugged and connected to the corresponding positioning holes.

[0008] In a preferred embodiment, the sealing mechanism includes a rubber sealing ring fixedly mounted on the outer walls of the two blocking rings, and annular sealing grooves are provided on the inner wall of the outer ring of the combined bearing at positions relative to the two rubber sealing rings. The two rubber sealing rings are respectively located in corresponding annular sealing grooves, and the gaps in the two annular sealing grooves are filled with lubricating oil.

[0009] In a preferred embodiment, the guide mechanism includes a guide hole opened in one of the annular sealing grooves, the guide hole penetrates the side wall of the outer ring of the combined bearing away from one end of the annular sealing groove, and the inner side wall of the outer ring of the combined bearing is located between the annular sealing groove and the No. 2 rolling groove and is provided with a plurality of guide grooves in an annular shape, and the two ends of the plurality of guide grooves are respectively connected to the annular sealing groove and the No. 2 rolling groove.

[0010] In a preferred embodiment, the clamping mechanism includes a rotating groove opened on one side of the inner ring of the combined bearing, a rotating ring is rotatably connected in the rotating groove, an inner side wall of the rotating ring is opened with an internal thread, an inner side wall of the rotating groove is opened with an external thread at a position relative to the internal thread, the external thread is threadedly connected to the internal thread, a trapezoidal pressing ring is fixedly connected to the bottom surface of the rotating ring, a plurality of top holes are opened in a ring shape on the inner side wall of the inner ring of the combined bearing, a plurality of the top holes are connected with the rotating groove, a plurality of arc-shaped top blocks are slidably connected in the top holes, a plurality of the arc-shaped top blocks are fixedly connected with trapezoidal blocks near one end of the rotating groove, a plurality of the bottom surfaces of the trapezoidal blocks are slidably connected to the inner side wall of the rotating groove, and a plurality of inclined surfaces on the top of the trapezoidal blocks are slidably connected to the inclined surfaces on the trapezoidal pressing ring.

[0011] In a preferred embodiment, the ends of the plurality of arc-shaped top blocks away from the trapezoidal block are fixedly connected to rubber pads.

[0012] In a preferred embodiment, the bottom of the plurality of trapezoidal blocks away from the arc-shaped top block is fixedly connected to a No. 2 spring, and the end of the plurality of No. 2 springs away from the trapezoidal blocks is fixedly connected to the inner side wall of the rotating groove.

[0013] In a preferred embodiment, both ends of the top surface of the rotating ring are vertically fixedly connected with vertical rods.

[0014] Technical effects and advantages of the present invention:

[0015] 1. The blocking ring can be quickly disassembled by setting a clamping mechanism, which greatly improves the convenience of later disassembly of the blocking ring and improves the efficiency of maintenance and repair;

[0016] 2. The sealing mechanism is provided to not only improve the sealing effect of the blocking ring after installation, but also reduce the friction between the blocking ring and the combined bearing, thereby improving the use effect of the combined bearing;

[0017] 3. The flow guide mechanism is provided to facilitate the application of lubricating oil inside the combined bearing, greatly improving the convenience of operation;

[0018] The clamping mechanism is provided to facilitate the tight clamping operation between the inner ring of the combined bearing and the shaft rod, thereby greatly improving their stability and avoiding sliding friction therebetween. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0020] Figure 1 It is a front cutaway structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the outer ring of the combined bearing of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the inner ring of the combined bearing of the present invention;

[0024] Figure 5 It is a schematic diagram of the positioning rod connection structure of the present invention;

[0025] Figure 6 It is a schematic diagram of the rotating ring structure of the present invention;

[0026] Figure 7 It is a schematic diagram of the arc top block connection structure of the present invention;

[0027] Figure 8 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0028] Fig. 9 For the present invention Figure 1 Enlarged structural diagram at B in the middle.

[0029] The accompanying drawings are marked as follows: 1. outer ring of combined bearing; 2. inner ring of combined bearing; 3. ball; 4. blocking ring; 5. clamping mechanism; 6. sealing mechanism; 7. guide mechanism; 8. clamping mechanism; 9. storage groove; 10. No. 1 spring; 11. positioning rod; 12. positioning hole; 13. No. 1 rolling groove; 14. No. 2 rolling groove; 15. rubber sealing ring; 16. annular sealing groove; 17. drainage hole; 18. guide groove; 19. rotating groove; 20. rotating ring; 21. external thread; 22. internal thread; 23. trapezoidal pressing ring; 24. top hole; 25. arc-shaped top block; 26. trapezoidal block; 27. No. 2 spring; 28. rubber pad; 29. ​​vertical rod. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0031] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one scheme", "some schemes", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more schemes or examples in a suitable manner.

[0035] Embodiment 1:

[0036] As attached Figure 1-9 A combined bearing shown in the figure comprises: a combined bearing outer ring 1 and a combined bearing inner ring 2, the combined bearing inner ring 2 is located inside the combined bearing outer ring 1, a plurality of balls 3 are arranged in a ring shape between the combined bearing outer ring 1 and the combined bearing inner ring 2, two blocking rings 4 are respectively arranged between the combined bearing outer ring 1 and the combined bearing inner ring 2 on both sides of the plurality of balls 3, the inner sides of the two blocking rings 4 are provided with a clamping mechanism 5 for disassembling and assembling the blocking rings 4, the outer sides of the two blocking rings 4 are provided with a sealing mechanism 6 for reducing friction, a guide mechanism 7 for guiding lubricating oil is provided on one side of one of the blocking rings 4 on the combined bearing outer ring 1, and a clamping mechanism 8 for clamping the shaft rod is provided on the combined bearing inner ring 2.

[0037] The No. 2 rolling groove 14 is opened on the inner wall of the outer ring 1 of the combined bearing and is located at the relative position of the multiple balls 3. The No. 1 rolling groove 13 is opened on the outer wall of the inner ring 2 of the combined bearing and is located at the relative position of the multiple balls 3. The multiple balls 3 are all rollingly connected with the No. 1 rolling groove 13 and the No. 2 rolling groove 14. The clamping mechanism 5 includes a storage groove 9 opened on both sides of the blocking ring 4. Two positioning rods 11 are respectively slidably connected to the two storage grooves 9. The No. 1 spring 10 is fixedly connected to one end of the positioning rod 11. The end of the No. 1 spring 10 away from the positioning rod 11 is fixedly connected to the inner wall of the storage groove 9. Multiple positioning holes 12 are opened through the surface of the inner ring 2 of the combined bearing and are located at the relative position of the multiple positioning rods 11. The ends of the multiple positioning rods 11 away from the No. 1 spring 10 are all plug-connected with the corresponding positioning holes 12. The plug-connection between the positioning rod 11 and the corresponding positioning holes 12 facilitates the convenience of disassembly of the blocking ring 4.

[0038] The sealing mechanism 6 includes a rubber sealing ring 15 fixedly sleeved on the outer side walls of the two blocking rings 4, and two annular sealing grooves 16 are opened on the inner side wall of the combined bearing outer ring 1 and are respectively located at the relative positions of the two rubber sealing rings 15. The two rubber sealing rings 15 are respectively located in the corresponding annular sealing grooves 16, and the gaps in the two annular sealing grooves 16 are filled with lubricating oil. By filling with lubricating oil, not only the sealing between the rubber sealing ring 15 and the annular sealing groove 16 is improved, but also the friction generated therebetween is reduced.

[0039] The specific implementation method is as follows: by setting the clamping mechanism 5, it is convenient to quickly disassemble the blocking ring 4, which greatly improves the convenience of later disassembly of the blocking ring 4 and improves the maintenance and repair efficiency; by setting the sealing mechanism 6, not only the sealing effect of the blocking ring 4 after installation is improved, but also the friction between it and the combined bearing is reduced, thereby improving the use effect of the combined bearing.

[0040] As attached Figure 1 , Figure 3 With attached Figure 8 In the combined bearing shown in the figure, the guide mechanism 7 includes a guide hole 17 opened in one of the annular sealing grooves 16, the guide hole 17 penetrates the side wall of the outer ring 1 of the combined bearing away from the end of the annular sealing groove 16, and a plurality of guide grooves 18 are opened in annular shape on the inner wall of the outer ring 1 of the combined bearing and are located between the annular sealing groove 16 and the second rolling groove 14, and the two ends of the plurality of guide grooves 18 are respectively connected to the annular sealing groove 16 and the second rolling groove 14.

[0041] The specific implementation method is as follows: by providing the flow guide mechanism 7, it is convenient to apply the lubricating oil to the inside of the combined bearing, thereby greatly improving the convenience of operation.

[0042] Embodiment 2:

[0043] This embodiment is an improvement based on the first embodiment:

[0044] As attached Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 With attached Fig. 9A combined bearing shown in the figure comprises a clamping mechanism 8 including a rotating groove 19 provided on one side of an inner ring 2 of the combined bearing, a rotating ring 20 rotatably connected in the rotating groove 19, an internal thread 22 provided on the inner side wall of the rotating ring 20, an external thread 21 provided on the inner side wall of the rotating groove 19 and located at a position opposite to the internal thread 22, the external thread 21 is threadedly connected to the internal thread 22, a trapezoidal pressing ring 23 is fixedly connected to the bottom surface of the rotating ring 20, a plurality of top holes 24 are provided in an annular shape on the inner side wall of the inner ring 2 of the combined bearing, the plurality of top holes 24 are all connected to the rotating groove 19, a plurality of arcuate top blocks 25 are respectively slidably connected to the plurality of top holes 24, a plurality of trapezoidal blocks 26 are respectively fixedly connected to one end of the plurality of arcuate top blocks 25 close to the rotating groove 19, the bottom surfaces of the plurality of trapezoidal blocks 26 are all slidably connected to the inner side wall of the rotating groove 19, and the inclined surfaces at the tops of the plurality of trapezoidal blocks 26 are all slidably connected to the inclined surfaces on the trapezoidal pressing ring 23.

[0045] A plurality of rubber pads 28 are fixedly connected to the ends of the plurality of arc-shaped top blocks 25 away from the trapezoidal block 26 . The plurality of rubber pads 28 increase the friction force, thereby improving the fixing effect of the shaft rod.

[0046] Multiple No. 2 springs 27 are respectively fixedly connected to the bottom of the multiple trapezoidal blocks 26 away from the arc-shaped top block 25. The ends of the multiple No. 2 springs 27 away from the trapezoidal blocks 26 are fixedly connected to the inner wall of the rotating groove 19. The arc-shaped top block 25 is retracted into the top hole 24 through the rebound of the No. 2 springs 27, which facilitates the release of the clamping state of the shaft rod.

[0047] Two vertical rods 29 are vertically fixedly connected to two ends of the top surface of the rotating ring 20 , and the two vertical rods 29 facilitate the convenience of rotating the rotating ring 20 .

[0048] The specific implementation method is as follows: by providing a clamping mechanism 8, it is convenient to perform a tight clamping operation between the combined bearing inner ring 2 and the shaft rod, thereby greatly improving their stability and avoiding sliding friction therebetween.

[0049] The working principle of the present invention is as follows: when working, firstly, two blocking rings 4 are arranged on both sides of the combined bearing, and then the positioning rod 11 is pressed to make it be received in the receiving groove 9, and then the two blocking rings 4 are respectively sleeved on the two ends of the inner ring 2 of the combined bearing, and the receiving groove 9 is aligned with the corresponding positioning hole 12. When the blocking ring 4 is sleeved on the inner ring 2 of the combined bearing, the positioning rod 11 is extended into the corresponding positioning hole 12 by the elastic force of the No. 1 spring 10 to fix the position of the blocking ring 4, and at the same time, the rubber sealing ring 15 is inserted into the annular sealing groove 16, and then the lubricating oil is filled into the gap in the annular sealing groove 16. By filling the lubricating oil, not only the friction between the rubber sealing ring 15 and the annular sealing groove 16 is reduced, but also the sealing effect therebetween is improved. When it is necessary to apply lubricating oil to multiple balls 3 to improve the use effect of the combined bearing, firstly, the lubricating liquid is extracted through the syringe, and then the needle is inserted into the drainage hole 17 to inject the lubricating oil into the annular sealing groove 16, and then the lubricating oil in the annular sealing groove 16 passes through multiple guide grooves. 18 is guided to flow into the second rolling groove 14, and then the outer ring 1 of the combined bearing and the inner ring 2 of the combined bearing are rotated to evenly distribute the lubricating oil on the surfaces of multiple balls 3, greatly improving the convenience of adding lubricating oil. When it is necessary to disassemble the blocking ring 4, the ejector pin is inserted into the positioning hole 12, and one end of the positioning rod 11 is ejected from the positioning hole 12, and then the two blocking rings 4 can be removed from both sides of the combined bearing, which improves the convenience of its later maintenance and repair. After the shaft rod is inserted into the inner ring 2 of the combined bearing, the The two vertical rods 29 drive the rotating ring 20 to rotate, and the internal thread 22 and the external thread 21 are meshed and connected, so that the rotating ring 20 drives the trapezoidal pressing ring 23 to descend, and the descent of the trapezoidal pressing ring 23 pushes the multiple trapezoidal blocks 26 to move horizontally. The multiple trapezoidal blocks 26 respectively push the multiple arc-shaped top blocks 25 out of the corresponding top holes 24 until the rubber pads 28 on one side of the multiple arc-shaped top blocks 25 are in close contact with the side wall of the shaft rod, so as to facilitate further fixing and clamping of the shaft rod to avoid sliding friction between it and the inner ring 2 of the combined bearing.

[0050] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A combined bearing, comprising: A combined bearing outer ring (1) and a combined bearing inner ring (2), characterized in that: the combined bearing inner ring (2) is located inside the combined bearing outer ring (1), a plurality of balls (3) are provided in an annular shape between the combined bearing outer ring (1) and the combined bearing inner ring (2), blocking rings (4) are provided on both sides of the plurality of balls (3) between the combined bearing outer ring (1) and the combined bearing inner ring (2), a clamping mechanism (5) for disassembling and assembling the blocking rings (4) is provided on the inner sides of the two blocking rings (4), a sealing mechanism (6) for reducing friction is provided on the outer sides of the two blocking rings (4), a guide mechanism (7) for guiding lubricating oil is provided on one side of one of the blocking rings (4) on the combined bearing outer ring (1), and a clamping mechanism (8) for clamping a shaft rod is provided on the combined bearing inner ring (2); The clamping mechanism (5) comprises receiving grooves (9) provided on both sides of the blocking ring (4), positioning rods (11) being slidably connected in the two receiving grooves (9), one end of each of the positioning rods (11) being fixedly connected to a No. 1 spring (10), the end of the No. 1 spring (10) away from the positioning rod (11) being fixedly connected to the inner wall of the receiving groove (9), and positioning holes (12) being provided through the surface of the inner ring (2) of the combined bearing at positions relative to the plurality of positioning rods (11), and the ends of the plurality of positioning rods (11) away from the No. 1 spring (10) being plug-connected to the corresponding positioning holes (12); The clamping mechanism (8) comprises a rotation groove (19) formed on one side of the combined bearing inner ring (2), a rotation ring (20) being rotationally connected in the rotation groove (19), an inner wall of the rotation ring (20) being provided with an internal thread (22), an inner wall of the rotation groove (19) being provided with an external thread (21) at a position opposite to the internal thread (22), the external thread (21) being threadedly connected to the internal thread (22), a trapezoidal pressing ring (23) being fixedly connected to the bottom surface of the rotation ring (20), and the combined bearing inner ring (2) The inner side wall is provided with a plurality of top holes (24) in an annular shape, and the plurality of top holes (24) are all connected to the rotation groove (19); the plurality of top holes (24) are slidably connected with an arc-shaped top block (25); the plurality of arc-shaped top blocks (25) are fixedly connected with a trapezoidal block (26) at one end close to the rotation groove (19); the bottom surfaces of the plurality of trapezoidal blocks (26) are slidably connected with the inner side wall of the rotation groove (19); and the inclined surfaces at the tops of the plurality of trapezoidal blocks (26) are slidably connected with the inclined surfaces on the trapezoidal pressing ring (23).

2. A combined bearing according to claim 1, characterized in that: The inner wall of the outer ring (1) of the combined bearing is provided with a second rolling groove (14) at a position relative to the plurality of balls (3), and the outer wall of the inner ring (2) of the combined bearing is provided with a first rolling groove (13) at a position relative to the plurality of balls (3). The plurality of balls (3) are all in rolling connection with the first rolling groove (13) and the second rolling groove (14).

3. A combined bearing according to claim 2, characterized in that: The sealing mechanism (6) comprises a rubber sealing ring (15) fixedly sleeved on the outer side walls of the two blocking rings (4); an annular sealing groove (16) is provided on the inner side wall of the outer ring (1) of the combined bearing at a position relative to the two rubber sealing rings (15); the two rubber sealing rings (15) are respectively located in corresponding annular sealing grooves (16); and the gaps in the two annular sealing grooves (16) are filled with lubricating oil.

4. A combined bearing according to claim 3, characterized in that: The flow guide mechanism (7) comprises a flow guide hole (17) formed in one of the annular sealing grooves (16); the flow guide hole (17) penetrates the side wall of the combined bearing outer ring (1) at one end away from the annular sealing groove (16); the inner side wall of the combined bearing outer ring (1) is provided with a plurality of flow guide grooves (18) in an annular shape between the annular sealing groove (16) and the second rolling groove (14); the two ends of the plurality of flow guide grooves (18) are respectively connected to the annular sealing groove (16) and the second rolling groove (14).

5. A combined bearing according to claim 1, characterized in that: The ends of the plurality of arc-shaped top blocks (25) away from the trapezoidal block (26) are all fixedly connected to a rubber pad (28).

6. A combined bearing according to claim 1, characterized in that: The bottoms of the plurality of trapezoidal blocks (26) away from the arc-shaped top block (25) are all fixedly connected to a No. 2 spring (27), and the ends of the plurality of No. 2 springs (27) away from the trapezoidal blocks (26) are all fixedly connected to the inner side wall of the rotating groove (19).

7. A combined bearing according to claim 1, characterized in that: Both ends of the top surface of the rotating ring (20) are vertically fixedly connected with vertical rods (29).

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