Slewing bearing with vibration absorption function

Abstract

The slewing bearing with the vibration absorption function comprises a lower flange plate and an outer supporting sleeve integrally formed at the inner edge opening of the top end of the lower flange plate, an inner ring sleeve is installed at one end of the interior of the outer supporting sleeve in a sliding mode, and a brim is integrally formed at the edge position of the top end of the inner ring sleeve. A main shaft is in bolted connection with the interior of the inner ring sleeve, the two ends of the main shaft penetrate to the exterior of the inner ring sleeve, and a bearing ring is rotationally installed at one end of the interior of the outer supporting sleeve. According to the bearing structure, direct hard contact between the main shaft and the inner ring sleeve can be effectively reduced, so that friction and abrasion between the main shaft and the inner ring sleeve are reduced, the service life of the main shaft and the inner ring sleeve is prolonged, and when the main shaft vibrates and slides slightly, the bearing ring and the spring can absorb and relieve the movement, so that the operation of the bearing structure is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shaft body support, specifically to a slewing bearing with vibration absorption function. BACKGROUND

[0002] The slewing bearing of the shaft body plays a key role in the rotary motion, mainly through supporting and positioning the shaft body, bearing and transmitting the load, realizing the rotary motion and reducing the friction and energy loss to ensure the normal operation and accurate performance of the mechanism or system, and the structure comprises an outer ring, an inner ring, rolling elements, a retainer, a sealing element and a lubrication system, the outer ring is usually fixed on the outside of the machine tool or mechanical structure as the basis of overall support, has several fixed mounting holes for being fixed on the base or other basis, the inner ring is directly connected to the shaft body needing rotation, the rolling elements can be balls, rollers or rollers, etc., which are distributed in the raceway between the outer ring and the inner ring, and the contact area is reduced through rolling to reduce the friction force, but the shaft body is hard connected with the inner ring at the present stage, in some occasions where the shaft body needs to vibrate and slip along the extension direction of the central axis of the inner ring, the slewing bearing will bear a large impact force, that is, the hard connection will cause the friction between the shaft body and the inner ring to increase, thereby accelerating the wear of the parts, and finally leading to the overload of the bearing capacity of the slewing bearing and affecting the service life. CONTENT

[0003] The utility model discloses a slewing bearing with vibration absorption function, the main shaft is fixed with the inner ring cover and is fixed with the inner ring cover, when the main shaft vibrates and slips, the main shaft, the inner ring cover will slide in the outer support cover together, and the vibration of the main shaft and the inner ring cover is absorbed and alleviated by the support ring and the spring, so as to solve the problems in the above background technology.

[0004] In order to achieve the above object, the utility model provides the following technical scheme: a slewing bearing with vibration absorption function, including lower flange plate and the outer support cover of lower flange plate top end inner rim one-piece forming, and the inner ring cover is slidably installed in the one end of outer support cover, the brim of inner ring cover top end is integrally formed with the brim, the inner ring cover is fixed with the main shaft, and the both ends of main shaft are penetrated to the outside of inner ring cover, the one end of outer support cover is rotatably installed with the supporting ring, the bottom of inner ring cover is installed with a plurality of equal interval sliding guide, and the sliding guide is penetrated to the outside of supporting ring, the top of supporting ring is installed with a plurality of springs, and the top of spring is fixedly connected with the bottom of inner ring cover.

[0005] Preferably, the front and rear outer walls of the outer support cover are provided with hollow parts, and the outer wall of one side of the outer support cover is integrally formed with an oil injection nozzle.

[0006] Preferably, one end of the outer sleeve is fixed with a steel sleeve, and the inner diameter of the steel sleeve is greater than or equal to the outer diameter of the main shaft.

[0007] Preferably, one end of the outer sleeve is fixed with an upper support ring and a lower support ring, and the distance between the upper support ring and the lower support ring is equal to the thickness of the bearing ring.

[0008] Preferably, one end of the surface of the main shaft is fixed with an upper flange, and the top end of the upper flange is provided with a plurality of positioning pins entering into the brim of the cap.

[0009] Preferably, the inner wall of one side of the inner ring sleeve is integrally formed with a rectangular protruding edge, and the outer wall of one side of the main shaft is provided with a rectangular cutaway groove in sliding fit with the rectangular protruding edge.

[0010] Preferably, the spring is provided with eight, and the eight springs are in a symmetrical structure about the central axis of the inner ring sleeve.

[0011] Preferably, the sliding guide comprises a guide column fixed at the bottom end of the inner ring sleeve and an anti-dropping disc mounted at the bottom end of the guide column, and the inner portion of the bearing ring is provided with a guide hole for the guide column to pass out.

[0012] Compared with the prior art, the beneficial effects of the utility model are that: the slewing bearing with vibration absorption function can effectively reduce the direct hard contact between the main shaft and the inner ring sleeve, thereby reducing the friction and wear of the two, prolonging the service life of the main shaft and the inner ring sleeve, and when the main shaft is subjected to micro-vibration and sliding, the bearing ring and the spring can absorb and alleviate these movements, so that the operation of the bearing structure is more stable. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0014] Figure 2 It is a three-dimensional sectional structure schematic view of the utility model;

[0015] Figure 3 It is a three-dimensional sectional structure schematic view of the outer sleeve of the utility model;

[0016] Figure 4 It is a three-dimensional sectional structure schematic view of the main shaft of the utility model;

[0017] Figure 5 It is a three-dimensional structure schematic view of the main shaft of the utility model.

[0018] In the figure: 1, lower flange plate; 2, outer sleeve; 201, oil nozzle; 202, hollow part; 3, inner ring sleeve; 301, brim; 302, rectangular flange; 4, supporting ring; 401, guide hole; 5, main shaft; 501, upper flange plate; 502, positioning pin; 503, rectangular cutout groove; 6, spring; 7, sliding guide; 701, guide column; 702, anti-drop disc; 8, steel sleeve; 9, upper support ring; 10, lower support ring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0020] Please refer to Figures 1-5 An embodiment provided by the utility model: a slewing bearing with vibration absorption function, comprising a lower flange plate 1 and an outer sleeve 2 integrally formed with the inner edge of the top end of the lower flange plate 1, and an inner ring sleeve 3 is slidably installed at one end inside the outer sleeve 2, a brim 301 is integrally formed at the edge position of the top end of the inner ring sleeve 3, a main shaft 5 is bolted inside the inner ring sleeve 3, both ends of the main shaft 5 penetrate to the outside of the inner ring sleeve 3, a supporting ring 4 is rotatably installed at one end inside the outer sleeve 2, an upper support ring 9 and a lower support ring 10 are fixed at one end inside the outer sleeve 2, and the spacing between the upper support ring 9 and the lower support ring 10 is equal to the thickness of the supporting ring 4;

[0021] A plurality of sliding guides 7 are installed at the bottom end of the inner ring sleeve 3 and penetrate to the outside of the supporting ring 4 at equal intervals, a plurality of springs 6 are installed at the top end of the supporting ring 4, the top end of the spring 6 is fixedly connected with the bottom end of the inner ring sleeve 3, the spring 6 is provided with eight, the eight springs 6 are symmetrical about the central axis of the inner ring sleeve 3, through the structural design of the supporting ring 4 and the spring 6, the direct hard contact between the main shaft 5 and the inner ring sleeve 3 can be effectively reduced, thereby reducing the friction and wear of the two, prolonging the service life of the main shaft 5 and the inner ring sleeve 3;

[0022] Hollow parts 202 are formed on the front and rear outer walls of the outer sleeve 2, and an oil nozzle 201 is integrally formed on the outer wall of one side of the outer sleeve 2; a steel sleeve 8 is fixed at one end inside the outer sleeve 2, the inner diameter of the steel sleeve 8 is greater than or equal to the outer diameter of the main shaft 5, and the rotation stability of the main shaft 5 is improved through the steel sleeve 8;

[0023] One end of the surface of the main shaft 5 is fixed with an upper flange plate 501, the top end of the upper flange plate 501 is installed with a plurality of positioning pins 502 which enter into the brim 301, when the inner ring sleeve 3 and the main shaft 5 are connected, the main shaft 5 and the inner ring sleeve 3 can be assembled by sliding, the lower surface of the paper upper flange plate 501 is in contact with the upper surface of the brim 301, at this time the upper flange plate 501 and the brim 301 are bolted by using the positioning pins 502, so as to complete the quick assembly of the inner ring sleeve 3 and the main shaft 5;

[0024] The inner wall of one side of the inner ring sleeve 3 is integrally formed with a rectangular flange 302, the outer wall of one side of the main shaft 5 is provided with a rectangular cutaway groove 503 which is in sliding cooperation with the rectangular flange 302, when the inner ring sleeve 3 and the main shaft 5 are assembled by sliding, the rectangular flange 302 on the inner wall of the inner ring sleeve 3 is inserted and slides with the rectangular cutaway groove 503 on the outer wall of the main shaft 5, so as to ensure the accurate alignment between the inner ring sleeve 3 and the main shaft 5;

[0025] The sliding guide 7 includes a guide column 701 which is fixed at the bottom end of the inner ring sleeve 3 and a anti-dropping disc 702 which is installed at the bottom end of the guide column 701, the inner part of the supporting ring 4 is provided with a guide hole 401 through which the guide column 701 passes, when the inner ring sleeve 3 and the main shaft 5 slide towards the supporting ring 4, the guide column 701 will slide in the guide hole 401 of the supporting ring 4, and the anti-dropping disc 702 plays a role of anti-dropping;

[0026] The supporting ring 4 can rotate with the inner ring sleeve 3 and the main shaft 5, and the inner ring sleeve 3 and the supporting ring 4 can relatively slide by the sliding guide 7.

[0027] In use, first the staff fixes the outer sleeve 2 on the base or other foundation through the lower flange plate 1, and connects the upper and lower ends of the main shaft 5 to the rotary driving end and the load end, at this time the rotary driving end can drive the load end to rotate through the main shaft 5, in this process the main shaft 5 will drive the supporting ring 4 and the inner ring sleeve 3 to rotate together, the upper supporting ring 9 and the lower supporting ring 10 support the rotation of the supporting ring 4, so that it can rotate stably, if the load end generates a force along the central axis of the inner ring sleeve 3 to the main shaft 5, the main shaft 5 will drive the inner ring sleeve 3 and the sliding guide 7 to move downward, and force the spring 6 to be in a compressed state, when the force of the load end disappears, the spring 6 begins to recover the deformation until the main shaft 5, the sliding guide 7 and the inner ring sleeve 3 are pushed back to the initial position, through the structural design of the supporting ring 4 and the spring 6, the direct hard contact between the main shaft 5 and the inner ring sleeve 3 can be effectively reduced, so as to reduce the friction and wear between them, prolong the service life of the main shaft 5 and the inner ring sleeve 3, and when the main shaft 5 vibrates and slides slightly, the supporting ring 4 and the spring 6 can absorb and moderate these movements, so that the operation of the supporting structure is more stable, and the influence of vibration on the shaft body is reduced.

Claims

1. A slewing bearing having a vibration absorbing function, characterized by: The utility model provides a flange plate (1) and the outer sleeve (2) of the top end inside along the mouth integrated of flange plate (1) bottom, and the inside one end of outer sleeve (2) is slidably installed inner ring cover (3), the edge position of the top end of inner ring cover (3) is integrally formed with the brim (301), the inside of inner ring cover (3) is bolted with the main shaft (5), and both ends of main shaft (5) are penetrated to the outside of inner ring cover (3), the inside one end of outer sleeve (2) is rotatably installed with the support ring (4), the bottom of inner ring cover (3) is installed with a plurality of equidistance and the sliding guide (7) that penetrates to the outside of support ring (4), the top of support ring (4) is installed with a plurality of springs (6), and the top of spring (6) is fixedly connected with the bottom of inner ring cover (3).

2. The slewing bearing with vibration absorbing function according to claim 1, characterized in that: The front and rear outer walls of the outer sleeve (2) are provided with hollow parts (202), and the outer wall of one side of the outer sleeve (2) is integrally formed with an oil injection nozzle (201).

3. The slewing bearing with vibration absorbing function according to claim 1, characterized in that: One end of the inner part of the outer sleeve (2) is fixed with a steel sleeve (8), and the inner diameter of the steel sleeve (8) is greater than or equal to the outer diameter of the main shaft (5).

4. The slewing bearing with vibration absorbing function according to claim 1, characterized in that: One end of the inner part of the outer sleeve (2) is fixed with an upper support ring (9) and a lower support ring (10), and the spacing between the upper support ring (9) and the lower support ring (10) is equal to the thickness of the support ring (4).

5. The slewing bearing with vibration absorbing function according to claim 1, characterized in that: One end of the surface of the main shaft (5) is fixed with an upper flange plate (501), and the top of the upper flange plate (501) is provided with a plurality of positioning pins (502) entering the brim (301).

6. The slewing bearing with vibration absorbing function according to claim 1, characterized in that: One side of the inner wall of the inner ring cover (3) is integrally formed with a rectangular convex edge (302), and one side of the outer wall of the main shaft (5) is provided with a rectangular cutout groove (503) in sliding cooperation with the rectangular convex edge (302).

7. The slewing bearing with vibration absorbing function according to claim 1, characterized in that: The eight springs (6) are symmetrically arranged about the central axis of the inner ring cover (3).

8. The slewing bearing with vibration absorbing function according to claim 1, characterized in that: The sliding guide (7) comprises a guide column (701) fixed to the bottom of the inner ring cover (3) and a anti-dropping disc (702) installed at the bottom of the guide column (701), and the inner part of the support ring (4) is provided with a guide hole (401) for the guide column (701) to pass through.

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