Single-row crossed roller type slewing bearing

Abstract

The utility model discloses a single-row crossed roller type slewing bearing, and belongs to the technical field of slewing bearings. The single-row crossed roller type slewing bearing comprises a bearing outer ring and a bearing inner ring, the bearing inner ring is mounted on the inner side of the bearing outer ring, a roller ring group is arranged between the bearing outer ring and the bearing inner ring, and the bearing outer ring is rotationally connected with the bearing inner ring through the roller ring group. In order to solve the problem that the rotation precision of a support is reduced due to the fact that the movement track of the rollers is changed due to external force or abrasion, the movement track of the rollers in the same group or the other group is directly influenced, a ball shaft replaces a transmission shaft rod to achieve rotation operation of the transverse rollers and the vertical rollers. In the operation process, even if the motion trail of the transverse pin roller or the vertical pin roller slightly deviates, the adaptive angle can be rapidly adjusted through the ball shaft, and collision abrasion caused by deviation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of slewing bearings, in particular to a single-row cross-roller slewing bearing. Background Art

[0002] Slewing bearings are widely used in industry. They are important transmission components required for machines that need to make relative rotational motion between two objects and bear axial force, radial force, and tipping moment at the same time. Among them, the single-row cross-roller slewing bearing consists of two seat rings, has a compact structure, light weight, small assembly clearance, and high requirements for installation accuracy. The rollers are arranged crosswise in a 1:1 ratio and can bear axial force, tipping moment, and large radial force at the same time. It is widely used in lifting and transportation, engineering machinery, and military products.

[0003] The two groups of rollers in the existing single-row cross-roller slewing bearing will affect each other. As time goes by, once the motion trajectory of one of the rollers changes due to external force or wear, it will directly affect the motion trajectory of the rollers in the same group or another group, resulting in a decrease in the rotation accuracy of the bearing. Utility Model Content

[0004] The purpose of the utility model is to provide a single-row cross-roller slewing bearing, in which a ball shaft replaces a transmission shaft to realize the rotation operation of the transverse roller and the vertical roller themselves. During operation, even if the movement trajectory of the transverse roller or the vertical roller is slightly offset, the ball shaft can be used to quickly adjust the adaptation angle to avoid collision and wear caused by the offset, thereby solving the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a single-row cross-roller slewing bearing, comprising a supporting outer ring and a supporting inner ring, wherein the supporting inner ring is installed on the inner side of the supporting outer ring, and a roller ring group is arranged between the supporting outer ring and the supporting inner ring, wherein the supporting outer ring is rotatably connected to the supporting inner ring through the roller ring group, and the two groups of rollers of the roller ring group are arranged perpendicular to each other, and the two groups are in direct contact with each other to limit each other, so that there is no need to use partitions to hold the rollers in place, and at the same time, the friction resistance generated between the partition structure and the rollers can be avoided.

[0006] Furthermore, the outer surface of the supporting outer ring is provided with an outer ring tooth opening, and the inner side of the supporting outer ring is provided with an inner shaft groove, and the outer ring tooth opening can be meshed and connected with the installation equipment.

[0007] Furthermore, a roller groove is provided between the supporting outer ring and the supporting inner ring, the roller ring group is installed inside the roller groove, and a plurality of installation positioning holes are provided at the bottom of the roller groove, through which the positioning and installation operation of the entire slewing bearing can be realized.

[0008] Furthermore, rubber strip grooves are provided on the outer surfaces of both the support inner ring and the inner engaging shaft groove. Among them, a limiting retaining ring is integrally formed on the inner side of the support inner ring. A sealing rubber strip can be installed inside the rubber strip groove, which can effectively prevent dust from entering the gap between the support outer ring and the support inner ring through the gap.

[0009] Furthermore, the roller ring group includes transverse rollers and vertical rollers, which are alternately distributed. Among them, the transverse rollers are in contact with the roller rotating grooves, and the vertical rollers are in contact with the limiting retaining ring. The transverse rollers and the vertical rollers are respectively in contact with the four annular surfaces inside the roller rotating grooves, which can improve the rotation efficiency of the inner ring and the outer ring and make the equipment operation smoother.

[0010] Furthermore, ball shafts are provided at both ends of the transverse rollers and the vertical rollers. The ball shafts are rotatably connected to both the transverse rollers and the vertical rollers. The ball shafts are slidably connected to the support outer ring and the support inner ring through arc grooves. The ball shafts are used to replace the transmission shaft rods to realize the rotation operation of the transverse rollers and the vertical rollers themselves. During operation, even if the movement trajectories of the transverse rollers and the vertical rollers deviate slightly, the angles can be quickly adjusted and adapted through the ball shafts to avoid collision and wear caused by the deviation. At the same time, the spherical design allows rotation in any direction to cope with the influence caused by the differential speed at both ends of the rollers.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. In the present utility model, the two sets of rollers in the roller ring group adopt a mutually perpendicular arrangement method, and they are in direct contact with each other for mutual limitation. In this way, there is no need to use partitions to position the rollers, and at the same time, the frictional resistance generated between the partition structure and the rollers can be avoided.

[0013] 2. In the present utility model, the ball shafts are used to replace the transmission shaft rods to realize the rotation operation of the transverse rollers and the vertical rollers themselves. During operation, even if the movement trajectories of the transverse rollers or the vertical rollers deviate slightly, the angles can be quickly adjusted and adapted through the ball shafts to avoid collision and wear caused by the deviation. At the same time, the spherical design allows rotation in any direction to cope with the influence caused by the differential speed at both ends of the rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the overall front view of the present utility model;

[0015] Figure 2 is the overall sectional structure schematic diagram of the present utility model;

[0016] Figure 3 is the overall exploded structure schematic diagram of the present utility model;

[0017] Figure 4 For Figure 3 the enlarged structural schematic diagram of part A

[0018] In the figure: 1, supporting outer ring; 2, supporting inner ring; 3, roller ring group; 101, outer ring tooth opening; 102, installation positioning hole; 103, internal engaging shaft groove; 104, roller rotating groove; 201, rubber strip pad groove; 202, limit retaining ring; 301, transverse roller; 302, vertical roller; 303, ball shaft. Specific implementation mode

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0020] In order to solve the problem that the two groups of rollers in the existing single-row crossed roller type slewing bearing will affect each other. As time goes by, once the movement trajectory of one of the rollers changes due to external force or wear, it will directly affect the movement trajectory of the same group or another group of rollers, resulting in a decrease in the rotation accuracy of the support; please refer to Figures 1-4 the following, the present invention provides the following solutions:

[0021] A single-row crossed roller type slewing bearing includes a supporting outer ring 1 and a supporting inner ring 2. The supporting inner ring 2 is installed inside the supporting outer ring 1. A roller ring group 3 is arranged between the supporting outer ring 1 and the supporting inner ring 2. Among them, the supporting outer ring 1 is rotationally connected to the supporting inner ring 2 through the roller ring group 3. The two groups of rollers in the roller ring group 3 are arranged perpendicular to each other, and they are in direct contact with each other for limiting, so that there is no need to use partitions to position the rollers, and at the same time, the frictional resistance generated between the partition structure and the rollers can be avoided.

[0022] Specifically, an outer ring tooth opening 101 is arranged on the outer surface of the supporting outer ring 1, and an internal engaging shaft groove 103 is arranged inside the supporting outer ring 1. The outer ring tooth opening 101 can be meshed and connected with the installation equipment.

[0023] Specifically, a roller rotating groove 104 is arranged between the supporting outer ring 1 and the supporting inner ring 2. The roller ring group 3 is installed inside the roller rotating groove 104. A plurality of installation positioning holes 102 are arranged at the bottom of the roller rotating groove 104. Through the installation positioning holes 102, the positioning installation operation of the entire slewing bearing can be realized.

[0024] Specifically, rubber strip grooves 201 are provided on the outer surfaces of the supporting inner ring 2 and the inner engagement shaft groove 103. Among them, a limiting retaining ring 202 is integrally formed on the inner side of the supporting inner ring 2. A sealing rubber strip can be installed inside the rubber strip groove 201, which can effectively prevent dust from entering the gap between the supporting outer ring 1 and the supporting inner ring 2 through the gap.

[0025] Specifically, the roller ring group 3 includes transverse rollers 301 and vertical rollers 302, which are alternately distributed. Among them, the transverse rollers 301 are in contact with the roller rotating groove 104, and the vertical rollers 302 are in contact with the limiting retaining ring 202. The transverse rollers 301 and the vertical rollers 302 are respectively in contact with the four annular surfaces inside the roller rotating groove 104, which can improve the rotation efficiency of the inner ring and the outer ring and make the equipment operate more smoothly.

[0026] Specifically, ball shafts 303 are provided at both ends of the transverse rollers 301 and the vertical rollers 302. The ball shafts 303 are rotatably connected to both the transverse rollers 301 and the vertical rollers 302. The ball shafts 303 are slidably connected to the supporting outer ring 1 and the supporting inner ring 2 through arc grooves. The ball shafts 303 replace the driving shaft rods to realize the rotation operation of the transverse rollers 301 and the vertical rollers 302 themselves. During operation, even if the movement trajectories of the transverse rollers 301 or the vertical rollers 302 deviate slightly, the ball shafts 303 can quickly adjust and adapt to the angle to avoid collision and wear caused by the deviation. At the same time, the design of the spheres can rotate in any direction to cope with the influence caused by the differential speed at both ends of the rollers.

[0027] Working principle: The two groups of rollers in the roller ring group are arranged perpendicular to each other and are in direct contact to limit each other. In this way, there is no need to use partitions to position the rollers, and at the same time, the frictional resistance generated between the partition structure and the rollers can be avoided. The ball shafts replace the driving shaft rods to realize the rotation operation of the transverse rollers and the vertical rollers themselves. During operation, even if the movement trajectories of the transverse rollers or the vertical rollers deviate slightly, the ball shafts can quickly adjust and adapt to the angle to avoid collision and wear caused by the deviation. At the same time, the design of the spheres can rotate in any direction to cope with the influence caused by the differential speed at both ends of the rollers.

[0028] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0029] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Single-row crossed roller slewing bearing, characterized in that, It includes a support outer ring (1) and a support inner ring (2). The support inner ring (2) is installed inside the support outer ring (1). A roller ring group (3) is arranged between the support outer ring (1) and the support inner ring (2). Among them, the support outer ring (1) is rotationally connected to the support inner ring (2) through the roller ring group (3).

2. The single-row crossed-roller slewing bearing according to claim 1, characterized in that: An outer ring tooth mouth (101) is arranged on the outer surface of the support outer ring (1), and an internal engagement shaft groove (103) is arranged inside the support outer ring (1).

3. The single-row crossed-roller slewing bearing according to claim 1, characterized in that: A roller rotation groove (104) is arranged between the support outer ring (1) and the support inner ring (2). The roller ring group (3) is installed inside the roller rotation groove (104). A plurality of installation positioning holes (102) are arranged at the bottom of the roller rotation groove (104).

4. The single-row crossed roller slewing bearing according to claim 3, wherein: Rubber strip cushion grooves (201) are arranged on the outer surfaces of the support inner ring (2) and the internal engagement shaft groove (103). Among them, a limiting retaining ring (202) is integrally formed inside the support inner ring (2).

5. The single-row crossed roller slewing bearing according to claim 4, characterized in that: The roller ring group (3) includes transverse rollers (301) and vertical rollers (302), which are alternately distributed between the transverse rollers (301) and the vertical rollers (302). Among them, the transverse rollers (301) are in contact with the roller rotation groove (104), and the vertical rollers (302) are in contact with the limiting retaining ring (202).

6. The single-row crossed roller slewing bearing according to claim 5, characterized in that: Ball shafts (303) are arranged at both ends of the transverse rollers (301) and the vertical rollers (302). The ball shafts (303) are rotationally connected to both the transverse rollers (301) and the vertical rollers (302). The ball shafts (303) are slidably connected to the support outer ring (1) and the support inner ring (2) through arc grooves.

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