Steel wire double-track circular truncated cone roller bearing

Abstract

The utility model discloses a steel wire double-track circular truncated cone roller bearing, which relates to the field of bearings and comprises an outer ring, an inner ring, a retainer and a rolling body, a retainer is mounted between the outer ring and the inner ring; a rolling body is mounted on the retainer; an outer upper track groove and an outer lower track groove are formed in the outer ring and are parallel to each other; an inner upper track groove and an inner lower track groove are formed in the inner ring and are parallel to each other; the inner side of the upper outer track is concave and is in transition fit with the upper outer raceway; the inner side of the upper inner track is concave and is in transition fit with the upper inner raceway; the inner side of the lower outer track is concave and is in transition fit with the lower outer raceway; and the inner side of the lower inner track is concave and is in transition fit with the lower inner raceway. The utility model has the advantages that the structure is simple, each component is convenient to disassemble and assemble, and the contact surface of each track and the raceway is concave and can be in transition fit with the raceway; according to the utility model, the double tracks are adopted, and the raceways are in point contact with the rolling bodies, so that the friction in the bearing operation process is reduced, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of bearings, in particular to a steel wire double-track circular table roller bearing. Background Art

[0002] Bearings are fundamental components in mechanical equipment and are relatively mature. Their primary function is to support the rotation of mechanical equipment, reduce friction during rotation, and ensure rotational accuracy. Therefore, improving bearing wear resistance and rotational accuracy is a major research area.

[0003] The processing difficulty of improving rotation accuracy is relatively large. Processing based on the bearing body makes the characteristics of the bearing material itself limit the performance of the bearing, especially in terms of wear resistance and rotation accuracy. The material characteristics of the bearing itself make the wear resistance of the bearing relatively low, and raceway processing based on the bearing body makes high-precision processing relatively limited.

[0004] Bearings with four contact points are widely used in various low-speed CT machines due to their mature and reliable technology and low cost. However, they are not yet suitable for various high-speed CT machines and do not meet the high speed, low noise, high precision, low vibration and long life requirements of high-speed CT machines. The main reasons are: 1. The bearings of high-speed CT machines carry a large load, especially a large overturning moment. 2. Under the action of the overturning moment, the steel balls and cage assemblies of the ball bearings with four contact points are greatly disturbed by the force during the movement of one rotation. The high-speed models used in medical or industrial CT machines today mainly include wire raceway bearings and thin-walled equal-section bearings, which can meet the working requirements of high-speed CT machines. However, due to structural problems, they have the disadvantages of difficult parts processing, high production costs and complex structures. Summary of the Invention

[0005] Based on the above problems, the utility model proposes a steel wire double-track circular cone roller bearing, which has easy disassembly and assembly of various components. The outer ring is split and the inner ring is integrated. The contact surface of each track and its corresponding raceway is concave, and the track and raceway are transitionally matched. The utility model adopts double tracks, and the raceway and the roller are in point contact, which reduces friction during the operation of the bearing and extends the working life of the bearing.

[0006] The technical solution adopted is: a steel wire double track cylindrical roller bearing, comprising an outer ring, an inner ring, a cage and rollers; a cage is installed between the outer ring and the inner ring; the rollers are installed on the cage; the outer ring comprises an outer ring upper ring body and an outer ring lower ring body, both of which are fixed by bolts;

[0007] The outer ring upper ring body is provided with a circle of outer ring upper track groove; the outer ring lower ring body is provided with a circle of outer ring lower track groove;

[0008] The inner ring is provided with an inner ring upper track groove and an inner ring lower track groove on the upper side and the lower side close to the roller respectively;

[0009] The outer ring upper track groove is on the same level as the inner ring upper track groove; the outer ring lower track groove is on the same level as the inner ring lower track groove;

[0010] The upper track groove of the outer ring has an interference fit with an upper outer track, and the inner track groove of the inner ring has an interference fit with an upper inner track; the lower track groove of the outer ring has an interference fit with a lower outer track, and the inner track groove of the inner ring has an interference fit with a lower inner track;

[0011] The inner side of the upper outer track is concave, and is in transition with the upper outer raceway; the inner side of the upper inner track is concave, and is in transition with the upper inner raceway; the inner side of the lower outer track is concave, and is in transition with the lower outer raceway; the inner side of the lower inner track is concave, and is in transition with the lower inner raceway;

[0012] The upper outer raceway, the upper inner raceway, the lower outer raceway, and the lower inner raceway are in contact with the rollers respectively;

[0013] The outermost sides of the outer ring upper track groove and the outer ring lower track groove are on the same vertical line of the outer ring; the rightmost sides of the inner ring upper track groove and the inner ring lower track groove are on the same vertical line of the inner ring;

[0014] The roller has a trapezoidal cross section, and is composed of an upper roller, a middle roller, and a lower roller from top to bottom. The three rollers are mounted on the roller shaft and are parallel to each other. A first slideway is formed between the upper roller and the middle roller, and a second slideway is formed between the middle roller and the lower roller.

[0015] The upper outer raceway and the upper inner raceway are in contact with the first slideway respectively; the lower outer raceway and the lower inner raceway are in contact with the second slideway respectively;

[0016] The retainer is in the shape of a circular ring; a plurality of trapezoidal holes are evenly opened on the retainer, and the rollers are installed in the trapezoidal holes.

[0017] Furthermore, the upper outer raceway, the upper inner raceway, the lower outer raceway and the lower inner raceway have the same structure, and their cross-sections are circular; the upper outer track, the upper inner track, the lower outer track and the lower inner track have the same structure, and their cross-sections are square and hollow.

[0018] Furthermore, the upper outer track includes a first upper outer track and a second upper outer track, which are at a certain distance from each other and the angle formed by the two being connected is 30 degrees; the upper inner track, the lower outer track, and the lower inner track have the same structure as the upper outer track, and will not be repeated here.

[0019] Furthermore, the middle roller is in the shape of a truncated cone, and the upper roller and the lower roller are half a truncated cone.

[0020] Furthermore, the upper outer raceway and the upper inner raceway are at the same level, and the diameter of the upper outer raceway is larger than the diameter of the upper inner raceway; the lower outer raceway and the lower inner raceway are at the same level, and the diameter of the lower outer raceway is larger than the diameter of the lower inner raceway.

[0021] The utility model has a simple structure, and the components are spliced ​​together, which makes it easy to replace the components and reduces the cost of bearing replacement.

[0022] The utility model adopts double tracks, with an upper track and a lower track installed between the outer ring and the inner ring. The upper track fits tightly with the upper raceway; the lower track fits tightly with the lower raceway; the upper raceway contacts with the first slideway; and the lower raceway contacts with the second slideway, thereby reducing friction when the bearing runs at high speed and extending the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional view of the utility model;

[0024] Figure 2 This is a schematic structural diagram of the upper outer track and the upper outer raceway in the utility model;

[0025] Figure 3 This is a schematic structural diagram of the roller in the utility model;

[0026] Figure 4 This is a cross-sectional view of the upper outer track and the upper outer raceway of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the retainer in the utility model.

[0028] Figure 6 It is a structural diagram of the present utility model. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0030] See also Figures 1 to 6 As shown, the wire double-track circular cone roller bearing includes an outer ring 1, an inner ring 2, a cage 3 and rollers 4; the cage 3 is installed between the outer ring 1 and the inner ring 2; the rollers 4 are installed on the cage 3; the outer ring 1 includes an outer ring upper ring body 11 and an outer ring lower ring body 12, which are fixed by bolts 13; the outer ring upper ring body 11 is provided with an outer ring upper track groove 14; the outer ring lower ring body is provided with an outer ring lower track groove 15; the inner ring 2 is provided with an inner ring upper track groove 21 and an inner ring lower track groove 22 on the upper side and lower side close to the rollers respectively;

[0031] The outer ring upper track groove 14, the inner ring upper track groove 25, and the first slideway 21 are on the same horizontal line; the outer ring lower track 15, the inner ring lower track groove 22, and the second slideway 22 are on the same horizontal line;

[0032] The upper outer track groove 14 of the outer ring is interference-fitted with the upper outer track 5, the inner side of which is concave, and is in transitional fit with the upper outer raceway 71; the upper inner track 9 is interference-fitted in the inner ring upper track groove 21, the inner side of which is concave, and is in transitional fit with the upper inner raceway 7; the lower outer track groove 15 of the outer ring is interference-fitted with the lower outer track 6, the inner side of which is concave, and is in transitional fit with the lower outer raceway 81; the lower inner track groove 22 of the inner ring is interference-fitted with the lower inner track 10, the inner side of which is concave, and is in transitional fit with the lower inner raceway 8;

[0033] The upper outer raceway 71, the upper inner raceway 7, the lower outer raceway 81, and the lower inner raceway 8 are in contact with the rollers respectively;

[0034] The outermost sides of the outer ring upper track groove 14 and the outer ring lower track groove 15 are on the same vertical line of the outer ring 1; the rightmost sides of the inner ring upper track groove 21 and the inner ring lower track groove 22 are on the same vertical line of the inner ring 2.

[0035] The roller 4 is in the shape of a truncated cone, and from top to bottom it is respectively an upper roller 41, a middle roller 42 and a lower roller 43. The upper roller and the lower roller are half a truncated cone, and the middle roller is truncated cone-shaped. The three are installed on the roller 46 and are parallel to each other; a first slide 44 is formed between the upper roller 41 and the middle roller 42; a second slide 45 is formed between the middle roller 42 and the lower roller 43; the upper outer roller 71 and the upper inner roller 7 are in contact with the first slide 44; the lower outer roller 81 and the lower inner roller 8 are in contact with the second slide 45 respectively.

[0036] The retainer 3 is in the form of a circular ring; a plurality of trapezoidal holes 31 are evenly formed on the retainer 3, and the rollers 4 are mounted in the trapezoidal holes 31.

[0037] The upper outer raceway 71, the upper inner raceway 7, the lower outer raceway 81, and the lower inner raceway 8 have the same structure, and their cross-sections are circular; the upper outer track 5, the upper inner track 9, the lower outer track 6, and the lower inner track 10 have the same structure, and their cross-sections are square and hollow, and they are also split; since the structures of these four tracks are the same, the upper outer track is used as an example for explanation, and the other tracks will not be repeated.

[0038] The upper outer track 5 includes a first upper outer track 51 and a second upper outer track 52. There is a certain distance between the two, and the angle formed by the two is 30 degrees; the upper inner track, the lower outer track, and the lower inner track have the same structure as the upper outer track, and will not be repeated here.

[0039] The upper outer raceway and the upper inner raceway are at the same level, and the diameter of the upper outer raceway is larger than the diameter of the upper inner raceway; the lower outer raceway and the lower inner raceway are at the same level, and the diameter of the lower outer raceway is larger than the diameter of the lower inner raceway.

Claims

1. Steel wire double track circular cone roller bearing, characterized by: It includes an outer ring, an inner ring, a cage and a roller; the cage is installed between the outer ring and the inner ring; the roller is installed on the cage; the outer ring includes an outer ring upper ring body and an outer ring lower ring body, and the two are fixed by bolts; The outer ring upper ring body is provided with a circle of outer ring upper track grooves; the outer ring lower ring body is provided with a circle of outer ring lower track grooves; The inner ring is provided with an annular inner ring upper track groove and an inner ring lower track groove on the upper side and the lower side close to the roller respectively; The outer ring upper track groove is on the same level as the inner ring upper track groove; the outer ring lower track groove is on the same level as the inner ring lower track groove; The upper track groove of the outer ring has an interference fit with an upper outer track, and the inner track groove of the inner ring has an interference fit with an upper inner track; the lower track groove of the outer ring has an interference fit with a lower outer track, and the inner track groove of the inner ring has an interference fit with a lower inner track; The inner side of the upper outer track is concave, and is in transition with the upper outer raceway; the inner side of the upper inner track is concave, and is in transition with the upper inner raceway; the inner side of the lower outer track is concave, and is in transition with the lower outer raceway; the inner side of the lower inner track is concave, and is in transition with the lower inner raceway; The upper outer raceway, the upper inner raceway, the lower outer raceway, and the lower inner raceway are in contact with the rollers respectively; The outermost sides of the outer ring upper track groove and the outer ring lower track groove are on the same vertical line of the outer ring; the rightmost sides of the inner ring upper track groove and the inner ring lower track groove are on the same vertical line of the inner ring; The rollers are trapezoidal in cross section, and are respectively an upper roller, a middle roller and a lower roller from top to bottom, and are mounted on the roller shaft and are parallel to each other; a first slideway is formed between the upper roller and the middle roller; a second slideway is formed between the middle roller and the lower roller; The upper outer raceway and the upper inner raceway are in contact with the first slideway respectively; the lower outer raceway and the lower inner raceway are in contact with the second slideway respectively; The retaining frame is in the shape of a circular ring; a plurality of trapezoidal holes are evenly opened on the retaining frame, and the rolling bodies are installed in the trapezoidal holes.

2. The steel wire double track circular cone roller bearing according to claim 1, characterized in that The upper outer raceway, upper inner raceway, lower outer raceway and lower inner raceway have the same structure, and their cross sections are circular; the upper outer track, upper inner track, lower outer track and lower inner track have the same structure, and their cross sections are square and hollow.

3. The steel wire double track circular cone roller bearing according to claim 1 or 2, characterized in that The upper outer track includes a first upper outer track and a second upper outer track, there is a certain distance between the two, and the angle formed by the two is 30 degrees; the upper inner track, the lower outer track, and the lower inner track have the same structure as the upper outer track.

4. The steel wire double track circular cone roller bearing according to claim 1, characterized in that The middle roller is in the shape of a truncated cone, and the upper roller and the lower roller are half a truncated cone.

5. The steel wire double track circular cone roller bearing according to claim 1, characterized in that The upper outer raceway and the upper inner raceway are at the same level, and the diameter of the upper outer raceway is larger than the diameter of the upper inner raceway; the lower outer raceway and the lower inner raceway are at the same level, and the diameter of the lower outer raceway is larger than the diameter of the lower inner raceway.

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