High-precision slewing bearing with adjustable clearance

Abstract

The utility model discloses a slewing bearing with adjustable clearance and high precision, and belongs to the field of slewing bearings. The high-precision slewing bearing capable of adjusting the clearance comprises an outer ring, an inner ring is arranged in the outer ring, a plurality of balls are arranged between the outer ring and the inner ring in a surrounding mode, and an isolation block welded and fixed through a connecting frame is arranged between every two adjacent balls. The slewing bearing solves the problems that when an existing slewing bearing rotates and carries out transmission, the positions of balls are fixed, the distance cannot be adjusted when the bearing is assembled, the bearing cannot adapt to different installation positions due to the fact that adjustment cannot be carried out when the bearing is assembled, and the bearing cannot adapt to corresponding clearances in high-speed and high-precision equipment. The adjusting block rotates in the connecting block and pushes the connecting block, and the isolation block can drive the balls to adjust the horizontal positions in the first movable rail and the second movable rail through pushing of the connecting block.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of slewing bearing, concretely is a slewing bearing with adjustable play and high precision. BACKGROUND

[0002] Slewing bearing is also called rotary bearing, can bear big axial, radial load and overturning moment, is called the joint of machine, is the important transmission component that two objects need relative slewing motion and need to bear multi-direction force at the same time, has firm structure, strong bearing capacity, convenient guidance, easy maintenance and other characteristics, is the key component indispensable in modern industry,

[0003] The patent with the publication number CN203906545U discloses a slewing bearing, which comprises an outer ring and an inner ring, steel balls are arranged between the outer ring and the inner ring, the play of the slewing bearing adopts axial radial negative play, so as to ensure the stability and precision of slewing under precise positioning, the positioning precision of the outer ring and the inner ring is high, so that the slewing precision of the slewing bearing is high.

[0004] The slewing bearing of the above patent can not adjust the distance when assembling the bearing when rotating and transmitting, can not adjust the bearing when assembling, so that the bearing can not adapt to different installation positions, and can not adapt to the corresponding play in high-speed and high-precision equipment. UTILITY MODEL CONTENTS

[0005] The utility model discloses a slewing bearing with adjustable play and high precision, the adjusting block is rotated in the connecting block and pushes the connecting block, the pushing of the connecting block can drive the ball to be adjusted in the horizontal position in the first movable track and the second movable track by the isolation block, the problem in the above background technology is solved.

[0006] To achieve the above object, the utility model provides the following technical scheme: a slewing bearing with adjustable play and high precision, comprising an outer ring, the inside of the outer ring is provided with an inner ring, a plurality of balls are arranged around the outer ring and the inner ring, isolation blocks are fixed by connecting frames and are arranged between two adjacent balls, the upper end of the ball is provided with a second movable track recessed in the inner part of the outer ring and the inner ring, the lower end of the ball is provided with a first movable track recessed in the inner part of the outer ring and the inner ring, the recess depth of the first movable track is greater than the recess depth of the second movable track, by the difference between the recess depth of the second movable track and the first movable track, the distance between the outer ring, the inner ring and the ball can be adjusted after the horizontal position of the ball is adjusted, and the play of the slewing bearing can be directly adjusted by the distance adjustment.

[0007] Preferably, both sides of the connecting frame are provided with a first movable hole recessed in the interior of the connecting frame, and the connecting block is independently installed through the recessed first movable hole, so that the position of the ball can be adjusted through the connecting block.

[0008] Preferably, the interior of the first movable hole is provided with a connecting block, the connecting block extends from the interior of the first movable hole to the upper end of the connecting frame, and after the connecting block penetrates the upper end of the connecting frame, the screwdriver can be embedded and rotated for adjustment.

[0009] Preferably, the position of the connecting block recessed in the first movable hole is a cuboid, the exterior of the connecting block is connected with the internal clamping groove of the first movable hole, and the cuboid connecting block can be fixed in the interior of the connecting frame to limit the threaded cooperation to make the connecting block rotate.

[0010] Preferably, the interior of the connecting block is recessed and provided with a second movable hole, the upper end of the exterior of the second movable hole is provided with an adjusting block in threaded cooperation with the interior of the connecting block, the horizontal position of the connecting block can be adjusted by rotating the adjusting block in the second movable hole, and the adjusting block rotates while adjusting the longitudinal horizontal position in the reserved second movable hole.

[0011] Preferably, the connecting block is made of stainless steel, and the stainless steel connecting block can avoid rusting after being exposed to the outdoor environment for a long time, so that the rust does not affect the adjustment of the position of the ball.

[0012] Compared with the prior art, the utility model has the beneficial effects as follows:

[0013] When the slewing bearing is installed and the distance between the ball, the outer ring and the inner ring is adjusted, the screwdriver is embedded in the interior of the adjusting block and makes the adjusting block rotate in the second movable hole in the interior of the connecting block before the bolt penetrates the holes reserved in the interior of the outer ring and the inner ring and connects the outer ring and the inner ring, the adjusting block and the inner wall of the second movable hole move relatively during the rotation, and the two adjusting blocks rotate in the same direction, so that the connecting frame drives the ball to adjust the longitudinal position between the second movable rail and the first movable rail, the area of the first movable rail is greater than that of the second movable rail, and the position of the ball can directly adjust the distance between the outer ring, the ball and the inner ring. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole external structure perspective view of the utility model;

[0015] Figure 2 It is an explosion view of the position relationship between the ball and the isolation block of the utility model;

[0016] Figure 3 It is an internal structure sectional view of the connecting frame of the utility model;

[0017] Figure 4 The utility model discloses Figure 3 A local enlarged view of the A region in the middle.

[0018] In the figure: 1, outer ring, 2, inner ring, 3, ball, 4, spacer block, 5, connecting frame, 6, first movable hole, 7, first movable rail, 8, second movable rail, 9, sealing strip, 10, connecting block, 11, adjusting block, 12, second movable hole. DETAILED DESCRIPTION

[0019] The application will be further described in conjunction with specific embodiments.

[0020] Example 1

[0021] As Figure 1 shown, the slewing bearing of the embodiment can adjust the clearance and has high precision, which comprises an outer ring 1, and the inner part of the outer ring 1 is provided with an inner ring 2, as Figure 1 and Figure 3 shown, a plurality of balls 3 are arranged around between the outer ring 1 and the inner ring 2, and a spacer block 4 is arranged between the adjacent two balls 3, the spacer block 4 supports and limits the adjacent two balls 3, avoids the collision between the adjacent two balls 3, enables the stable rotation of the balls 3, and improves the stability of the outer ring 1 and the inner ring 2 during rotation;

[0022] The upper end of the spacer block 4 is provided with a connecting frame 5, and the connecting frame 5 is welded and fixed with the spacer block 4, as Figure 2 shown, the spacer block 4 is fixed through the connecting frame 5, after being fixed, the balls 3 connected to the lower end of the spacer block 4 can be adjusted by driving the connecting frame 5, the horizontal position of the balls 3 can be directly adjusted to adjust the distance between the outer ring 1, the inner ring 2 and the balls 3, and the adjustment of the distance can adjust the clearance of the slewing bearing;

[0023] In addition, the two sides of the inside of the connecting frame 5 are provided with first movable holes 6, and the first movable holes 6 are recessed in the inside of the connecting frame 5, as Figure 3 and Figure 4 shown, the inside of the first movable hole 6 is provided with a connecting block 10, the connecting block 10 extends from the inside of the first movable hole 6 to the upper end of the connecting frame 5, and the position of the connecting block 10 recessed in the inside of the first movable hole 6 is a cuboid, the outside of the connecting block 10 is connected with the inside of the first movable hole 6 through a clamping groove, and the longitudinal position of the balls 3 can be adjusted through the connecting block 10 by clamping groove connection;

[0024] The connecting block 10 is made of stainless steel, the second movable hole 12 is arranged in the inner recess of the connecting block 10, the adjusting block 11 is arranged at the upper end outside the second movable hole 12, and the outer part of the adjusting block 11 is in threaded cooperation with the second movable hole 12 in the inner part of the connecting block 10, and the longitudinal position of the connecting block 10 can be adjusted by rotating the adjusting block 11;

[0025] The independent connecting block 10 can avoid rust caused by liquid erosion, and the rust can affect the adjustment of the longitudinal horizontal position of the ball 3.

[0026] In order to facilitate the adjustment of the adjusting block 11, as shown in Figure 1 、 Figure 3 and Figure 4 , the adjusting block 11 penetrates the inner ring 2 and extends to the upper end of the inner ring 2;

[0027] In order to improve the sealing effect, the sealing strips 9 are arranged at the upper and lower ends between the outer ring 1 and the inner ring 2, so that the liquid can be prevented from eroding and contacting the ball 3, and the lubricant on the surface of the ball 3 can be prevented from being invalidated due to the erosion of the liquid;

[0028] In order to adjust the spacing between the outer ring 1, the inner ring 2 and the ball 3 when the ball 3 is adjusted in the longitudinal horizontal position, as shown in Figure 3 , the second movable rail 8 is arranged at the upper end outside the ball 3, and the first movable rail 7 is arranged at the lower end outside the ball 3, and the first movable rail 7 and the second movable rail 8 are recessed in the inner wall of the outer ring 1 and the inner ring 2, the longitudinal horizontal position of the ball 3 is adjusted between the first movable rail 7 and the second movable rail 8, the recess depth of the first movable rail 7 is greater than that of the second movable rail 8, and the spacing between the outer ring 1, the inner ring 2 and the ball 3 can be adjusted by the different recess depths, and the play of the slewing bearing can be adjusted.

[0029] Working principle: when the device is used and the spacing between the outer ring 1, the inner ring 2 and the ball 3 is adjusted, the two screwdrivers are simultaneously embedded in the inner part of the adjusting block 11, the rotation of the adjusting block 11 can be in threaded cooperation with the inner wall of the second movable hole 12 in the inner part of the connecting block 10, and due to the limitation of the adjusting block 11 on the rectangular connecting block 10, the rotation of the adjusting block 11 drives the connecting frame 5 to adjust the horizontal position, the longitudinal position of the connecting frame 5 drives the ball 3 to adjust the longitudinal position, so that the ball 3 adjusts the position between the second movable rail 8 and the first movable rail 7, and the spacing between the outer ring 1, the inner ring 2 and the ball 3 can be adjusted due to the different areas of the first movable rail 7 and the second movable rail 8.

[0030] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0031] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application.

Claims

1. A slewing bearing with adjustable play and high accuracy, comprising an outer ring (1), the inside of which is provided with an inner ring (2), a number of balls (3) being provided around between the outer ring (1) and the inner ring (2), characterized in that, The two adjacent balls (3) are provided with isolation blocks (4) welded by connecting frames (5), the upper end of the outer ball (3) is provided with a second movable track (8) recessed in the outer ring (1) and the inner ring (2), and the lower end of the outer ball (3) is provided with a first movable track (7) recessed in the outer ring (1) and the inner ring (2), the recess depth of the first movable track (7) is greater than that of the second movable track (8).

2. The slewing bearing according to claim 1, characterized in that Both sides of the connecting frame (5) are provided with first movable holes (6) recessed in the connecting frame (5).

3. The slewing bearing of claim 2, wherein The first movable hole (6) is provided with a connecting block (10) inside, which extends from the inside of the first movable hole (6) to the upper end of the connecting frame (5).

4. The slewing bearing of claim 3, wherein The position of the connecting block (10) recessed in the first movable hole (6) is a cuboid, and the outer part of the connecting block (10) is connected with the inner part of the first movable hole (6) through a clamping groove.

5. The slewing bearing with adjustable clearance and high precision according to claim 3, characterized in that: The inside of the connecting block (10) is recessed to be provided with a second movable hole (12), and the upper end of the outside of the second movable hole (12) is provided with an adjusting block (11) matched with the inside of the connecting block (10).

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