Combined crossed cylindrical roller bearing

Abstract

The utility model relates to a combined crossed cylindrical roller bearing which comprises a double-half outer ring type outer sleeve, an integrated lengthened inner sleeve, a plurality of cylindrical rollers, roller blocking blocks and screws, a V-shaped raceway is correspondingly arranged between the inner diameter of the outer sleeve and the outer diameter of the inner sleeve, the V-shaped raceway of the outer sleeve and the V-shaped raceway of the outer diameter of the inner sleeve correspondingly form a cavity for accommodating the cylindrical rollers, and the cylindrical rollers are arranged in the cavity in a crossed manner; the end face of one end of the inner sleeve is flush with the end face of the outer sleeve at the same end, and the other end of the inner sleeve extends out of the end face of the outer sleeve and forms a protruding part. A roller blocking block is further arranged at the end, close to the protruding part, of the inner sleeve and fixedly connected with the inner sleeve through a screw. The whole structure adopts a plane special-shaped structure, is used for being matched with a steering engine plane structure, and has the characteristics of saving space, reducing weight and the like; and a crossed roller structure is adopted, the effects of axial, radial and upsetting moments can be borne at the same time, and the bearing capacity is greatly improved compared with a conventional thrust ball structure.

Description

Technical Field

[0001] The utility model relates to a bearing with a special structure, in particular to a combined cross cylindrical roller bearing, which is a plane special-shaped bearing used for a certain type of equipment steering gear and belongs to the field of bearings. Background Art

[0002] In the field of a certain type of equipment servo, bearings are the main load-bearing components. During flight, the equipment is subjected to aerodynamic loads, including axial loads and overturning moments. At the same time, as a structural component, it is responsible for component installation, mechanical positioning and other functions. Early design structures were mainly based on integral thrust ball structures, mainly considering the good rotation performance of the structure and being relatively simple and light. However, with the upgrade of equipment models and changes in load-bearing, higher requirements are placed on the bearing capacity of the bearing structure. At the same time, the high degree of integration and lightweight of the system also place higher requirements on the product structure. Utility Model Content

[0003] In view of the above-mentioned high performance requirements for bearings, the purpose of the utility model is to provide a combined crossed cylindrical roller bearing, which adopts a planar special-shaped structure and is used to match the plane structure of the servo. It has the characteristics of saving space and reducing weight, and has achieved good results in practical applications.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: a combined cross cylindrical roller bearing, comprising: a double semi-outer ring outer sleeve, an integrated extended inner sleeve, a plurality of cylindrical rollers, a roller blocking block and screws; a V-shaped raceway is arranged correspondingly between the inner diameter of the outer sleeve and the outer diameter of the inner sleeve, and the V-shaped raceway of the outer sleeve and the V-shaped raceway of the outer sleeve correspond to form a cavity for accommodating cylindrical rollers, and a plurality of cylindrical rollers are arranged crosswise in the cavity; the end face of one end of the inner sleeve is arranged flush with the end face of the outer sleeve at the same end, and the other end of the inner sleeve is extended from the position where the end face of the outer sleeve is located and forms a protrusion; a roller blocking block is also arranged at one end of the inner sleeve close to the protrusion direction, and the outer diameter of the roller blocking block cooperates with the outer diameter of the inner sleeve to form a V-shaped raceway of cylindrical rollers, and the roller blocking block is fixedly connected to the inner sleeve by screws;

[0005] Furthermore, the screw is a hexagon socket head screw, a screw hole is provided inwardly at the outer end of the roller blocking block, a threaded blind hole corresponding to the screw hole on the roller blocking block is provided on the inner sleeve, and the hexagon socket head screw is screwed inwardly from the outside to connect the roller blocking block and the inner sleeve together;

[0006] During the assembly process of the bearing of this scheme, the blocking roller block is disassembled and several cylindrical rollers are installed in sequence from there. After the cylindrical rollers are assembled, the blocking roller block and the inner sleeve are fastened by the hexagon socket head screws.

[0007] Furthermore, the cylindrical rollers of the bearing adopt a cross-arranged structure, which can bear the effects of axial, radial and overturning moments at the same time, and the bearing capacity is greatly improved compared with the conventional thrust ball structure; at the same time, the clearance is strictly controlled, and the overall operation is relatively stable and reliable;

[0008] Furthermore, among the plurality of cylindrical rollers, each two adjacent cylindrical rollers are separated by providing an isolation block;

[0009] Furthermore, the bearing of the present invention is composed of a double semi-outer ring outer sleeve and an integrated extended inner sleeve to form a planar special-shaped structure, which is used to match the plane structure of the steering gear, saving space and reducing weight;

[0010] Furthermore, the plane special-shaped structure includes a double semi-outer ring type outer sleeve consisting of an annular first outer ring and a square second outer ring adjacent to the first outer ring; the V-shaped raceway of the inner diameter of the outer sleeve is opened in the inner diameter of the first outer ring, and the second outer ring is close to the end face of the first outer ring away from the gambling roller block;

[0011] Furthermore, the first outer ring is fixedly connected to the second outer ring via a plurality of screws in the circumferential direction of the outer diameter of the first outer ring;

[0012] Furthermore, the screws connecting the first outer ring and the second outer ring are cross countersunk screws; the cross countersunk screws penetrate from the second outer ring to the first outer ring;

[0013] Furthermore, a plurality of mounting holes are arranged in the stress-bearing key areas around the square second outer ring, and the plurality of mounting holes are not evenly distributed on the square second outer ring. This special distribution method is more suitable for coordinated installation with the square base. Therefore, the mounting holes in this special distribution method are changed from the usual circumferential distribution to an uneven distribution, in order to enhance the overall anti-overturning ability of the structure and make the structure more stable.

[0014] Furthermore, the bearing of the present solution adopts a combined structure, through which the bearing ring and the base structure are highly integrated, and at the same time, it bears the functions of component installation and mechanical positioning;

[0015] Furthermore, the mounting holes distributed in the stress-bearing key areas around the second outer ring are threaded holes for mounting bolts, and the threaded holes adopt fine pitch threads, which are more accurate in positioning and have stronger resistance to overall vibration, vibration shock and loosening than traditional coarse pitch threads.

[0016] Furthermore, the threaded hole adopts M6X0.75 fine pitch thread with a pitch of 0.75;

[0017] Furthermore, a plurality of weight-reducing grooves are provided on the second outer ring according to the overall topology optimization result, so as to reduce the weight of the bearing.

[0018] The beneficial effects of adopting this technical solution are:

[0019] The overall structure adopts a flat special-shaped structure, which is used to match the flat structure of the steering gear, and has the characteristics of saving space and reducing weight;

[0020] The cross roller structure can bear axial, radial and overturning moments at the same time, and its bearing capacity is greatly improved compared with the conventional thrust ball structure.

[0021] The bearing is a combined structure, with the bearing ring and the base structure highly integrated, which can bear the functions of component installation and mechanical positioning while carrying the load;

[0022] The threads of the mounting holes use fine threads. Compared with traditional coarse threads, the focus is on vibration and shock resistance while enhancing the positioning function. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the bearing of the utility model.

[0024] Figure 2 for Figure 1 Side view of.

[0025] Figure 3 for Figure 2 sectional view of .

[0026] Figure 4 for Figure 3 Schematic diagram of direction A.

[0027] Figure 5 It is a three-dimensional structural diagram of the bearing of the utility model.

[0028] In the figure, 1, inner sleeve, 2, cylindrical roller, 3, roller blocking block, 4, protrusion, 5, hexagon socket head screw, 6, isolation block, 7, first outer ring, 8, second outer ring, 9, cross countersunk screw, 10, mounting hole, 11, weight reduction groove. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0030] like Figure 1-5The combined crossed cylindrical roller bearing shown comprises: a double-half outer ring outer sleeve, an integral extended inner sleeve 1, a plurality of cylindrical rollers 2, a roller blocking block 3 and screws; a V-shaped raceway is arranged correspondingly between the inner diameter of the outer sleeve and the outer diameter of the inner sleeve 1, and the V-shaped raceway of the outer sleeve and the V-shaped raceway of the outer diameter of the inner sleeve 1 correspond to form a cavity for accommodating the cylindrical rollers 2, and the plurality of cylindrical rollers 2 are arranged crosswise in the cavity; the end face of one end of the inner sleeve 1 is arranged flush with the end face of the outer sleeve at the same end, and the other end of the inner sleeve is extended from the position where the end face of the outer sleeve is located and forms a protrusion 4; a roller blocking block 3 is also arranged at one end of the inner sleeve 1 close to the protrusion 4, and the outer diameter of the roller blocking block 3 cooperates with the outer diameter of the inner sleeve 1 to form a V-shaped raceway of the cylindrical roller 2, and the roller blocking block 3 is fixedly connected to the inner sleeve 1 by screws;

[0031] Furthermore, the screw is a hexagon socket head screw 5, a screw hole is provided inwardly at the outer end of the roller blocking block 3, and a threaded blind hole corresponding to the screw hole on the roller blocking block 3 is provided on the inner sleeve 1. The hexagon socket head screw 5 is screwed inwardly from the outside to connect the roller blocking block 3 and the inner sleeve 1 together;

[0032] During the assembly process of the bearing of this solution, the roller blocking block 3 is disassembled and several cylindrical rollers 2 are installed in sequence from there. After the cylindrical rollers 2 are assembled, the roller blocking block 3 and the inner sleeve 1 are fastened by the hexagon socket head screws 5.

[0033] Among the plurality of cylindrical rollers 2, each two adjacent cylindrical rollers 2 are separated by an isolation block 6;

[0034] Furthermore, the bearing of the present invention is composed of a double semi-outer ring outer sleeve and an integral extended inner sleeve 1 to form a planar special-shaped structure, which is used to match the plane structure of the steering gear;

[0035] The bearing plane special-shaped structure includes a double-half outer ring outer sleeve consisting of an annular first outer ring 7 and a square second outer ring 8 adjacent to the first outer ring 7; the V-shaped raceway of the inner diameter of the outer sleeve is opened in the inner diameter of the first outer ring 7, and the second outer ring 8 is close to the end face of the first outer ring 7 away from the gambling roller block 3;

[0036] Furthermore, the first outer ring 7 is fixedly connected to the second outer ring 8 by a plurality of screws in the outer diameter circumferential direction thereof;

[0037] Furthermore, the screws connecting the first outer ring 7 and the second outer ring 8 are cross countersunk screws 9; the cross countersunk screws 9 penetrate from the second outer ring 8 to the first outer ring 7;

[0038] Furthermore, a plurality of mounting holes 10 are arranged in the stress-bearing key areas around the square second outer ring 8, and the plurality of mounting holes 10 are not evenly distributed on the square second outer ring 8. This special distribution method is more suitable for installation with the square base; therefore, the mounting holes 10 in this special distribution method are changed from the usual circumferential distribution to an uneven distribution, in order to enhance the overall anti-overturning ability of the structure and make the structure more stable;

[0039] Furthermore, the mounting holes 10 distributed in the stress-bearing key areas around the second outer ring 8 are threaded holes for mounting bolts, and the threaded holes adopt fine pitch threads, which are M6X0.75 fine pitch threads; compared with the traditional coarse pitch threads (pitch is 1), the positioning is more precise, and the overall vibration resistance, vibration shock resistance and anti-loosening ability are stronger;

[0040] It should be noted in this solution that, usually, the threaded holes for mounting bolts use coarse threads, with the main point being a stronger load-bearing capacity.

[0041] In this solution, fine pitch threads are selected by marking the threaded holes, with the focus on resistance to vibration and impact, while enhancing the positioning function.

[0042] A plurality of weight-reducing grooves 11 are provided on the second outer ring 8 according to the overall topology optimization result, so as to reduce the weight of the bearing and achieve lightweight.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "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.

[0044] 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 at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] 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 or an electrical connection; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A combined crossed cylindrical roller bearing, characterized in that: include: A double-and-half outer ring outer sleeve, an integrated extended inner sleeve, a plurality of cylindrical rollers, a roller blocking block and screws; a V-shaped raceway is arranged correspondingly between the inner diameter of the outer sleeve and the outer diameter of the inner sleeve, and the V-shaped raceway of the outer sleeve and the V-shaped raceway of the outer diameter of the inner sleeve correspond to form a cavity for accommodating cylindrical rollers, and a plurality of cylindrical rollers are cross-arranged in the cavity; the end face of one end of the inner sleeve is arranged flush with the end face of the outer sleeve at the same end, and the other end of the inner sleeve extends from the position where the end face of the outer sleeve is located and forms a protrusion; a roller blocking block is also arranged at one end of the inner sleeve close to the direction of the protrusion, and the outer diameter of the roller blocking block cooperates with the outer diameter of the inner sleeve to form a V-shaped raceway for cylindrical rollers, and the roller blocking block is fixedly connected to the inner sleeve by screws.

2. A combined crossed cylindrical roller bearing according to claim 1, characterized in that: The screw is a hexagon socket head screw, a screw hole is opened inward at the outer end of the roller blocking block, and a threaded blind hole corresponding to the screw hole on the roller blocking block is opened on the inner sleeve. The hexagon socket head screw is screwed in from the outside to the inside to connect the roller blocking block and the inner sleeve together.

3. The combined crossed cylindrical roller bearing according to claim 1, characterized in that: The bearing is composed of a double half outer ring outer sleeve and an integral extended inner sleeve to form a plane special-shaped structure.

4. A combined crossed cylindrical roller bearing according to claim 3, characterized in that: The planar special-shaped structure includes a double-half outer ring outer sleeve consisting of an annular first outer ring and a square second outer ring adjacent to the first outer ring; the V-shaped raceway of the inner diameter of the outer sleeve is opened in the inner diameter of the first outer ring, and the second outer ring is close to the end face of the first outer ring away from the gambling roller block.

5. A combined crossed cylindrical roller bearing according to claim 4, characterized in that: The first outer ring is fixedly connected to the second outer ring via a plurality of screws in the circumferential direction of the outer diameter of the first outer ring.

6. A combined crossed cylindrical roller bearing according to claim 5, characterized in that: The screws connecting the first outer ring and the second outer ring are cross countersunk screws; the cross countersunk screws penetrate and connect from the second outer ring to the first outer ring.

7. The combined crossed cylindrical roller bearing according to claim 4, characterized in that: A plurality of mounting holes are arranged at the stress-receiving key areas around the square second outer ring, and the plurality of mounting holes are not evenly distributed on the square second outer ring.

8. The combined crossed cylindrical roller bearing according to claim 7, characterized in that: The mounting holes distributed in the stress-receiving key areas around the second outer ring are threaded holes for mounting bolts, and the threaded holes adopt fine pitch threads.

9. The combined crossed cylindrical roller bearing according to claim 4, characterized in that: A plurality of weight-reducing grooves are provided on the second outer ring according to the overall topology optimization result.

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