阅读说明：本技术 三环双排异径回转支承轴承 (Three-ring double-row reducing slewing bearing ) 是由 顿丽华 李华伟 宋世勇 李鑫辉 邹德鹏 吴祖琳 冯世昱 崔传荣 唐丽虓 孙洪斌 于 2019-12-27 设计创作，主要内容包括：本发明属于回转支承轴承装配制造技术领域,具体涉及一种三环双排异径回转支承轴承包括外圈、第一内圈、第二内圈、第一滚道、第二滚道、第一列钢球和第二列钢球；所述第二内圈位于外圈和第一内圈之间,第一内圈与第二内圈对应的端面上设置有第一滚道；所述外圈与第二内圈对应的端面上设置有第二滚道；第一滚道与所述第二滚道沿轴向错位分布,第一滚道内装配有第一列钢球,第二滚道内装配有第二列钢球。本发明的轴承结构,其主要功能是将两个车体与转向架连接起来,三圈回转支承轴承同时承受车体和转向架间的轴向力、径向力和倾覆力矩,并且避免了轴承运转过程中的卡滞现象,提高了安全系数,增加了轴承的使用寿命。(The invention belongs to the technical field of assembly and manufacture of slewing bearing, and particularly relates to a three-ring double-row reducing slewing bearing which comprises an outer ring, a first inner ring, a second inner ring, a first rolling way, a second rolling way, a first row of steel balls and a second row of steel balls; the second inner ring is positioned between the outer ring and the first inner ring, and a first raceway is arranged on the end surface of the first inner ring corresponding to the second inner ring; a second raceway is arranged on the end surface of the outer ring corresponding to the second inner ring; the first rolling path and the second rolling path are distributed along the axial direction in a staggered manner, a first row of steel balls are assembled in the first rolling path, and a second row of steel balls are assembled in the second rolling path. The bearing structure has the main functions of connecting the two vehicle bodies with the bogie, and the three-ring slewing bearing simultaneously bears the axial force, the radial force and the overturning moment between the vehicle bodies and the bogie, thereby avoiding the clamping stagnation phenomenon in the running process of the bearing, improving the safety factor and prolonging the service life of the bearing.)

1. The double reducing slewing bearing of tricycle, its characterized in that: the device comprises an outer ring, a first inner ring, a second inner ring, a first raceway, a second raceway, a first row of steel balls and a second row of steel balls; the second inner ring is positioned between the outer ring and the first inner ring, and a first raceway is arranged on the end surface of the first inner ring corresponding to the second inner ring; a second raceway is arranged on the end surface of the outer ring corresponding to the second inner ring; the first rolling path and the second rolling path are distributed along the axial direction in a staggered manner, a first row of steel balls are assembled in the first rolling path, and a second row of steel balls are assembled in the second rolling path.

2. The slewing bearing with the three rings and the two rows of the different diameters as claimed in claim 1, wherein: and a first sealing ring is arranged at the joint part of the first inner ring and the second inner ring, and a second sealing ring is arranged at the joint part of the outer ring and the second inner ring.

3. The slewing bearing with the three rings and the two rows of the different diameters as claimed in claim 1, wherein: a first isolation block is arranged between two adjacent steel balls in the first row of steel balls, and a second isolation block is arranged between two adjacent steel balls in the second row of steel balls.

4. The slewing bearing with the three rings and the two rows of the different diameters as claimed in claim 1, wherein: an outer ring filling hole for assembling a second row of steel balls is formed in the outer ring in the radial direction, an outer ring ball blocking block is arranged in the outer ring filling hole, and the outer ring ball blocking block is fixed through an outer ring pin; and an inner ring filling hole for assembling a first row of steel balls is radially formed in the first inner ring, an inner ring ball blocking block is arranged in the inner ring filling hole, and the inner ring ball blocking block is fixed through an inner ring pin.

5. The three-ring double-row reducing slewing bearing according to claim 4, wherein: and a first threaded hole is formed in one end, far away from the first raceway, of the inner ring ball blocking block, and a second threaded hole is formed in one end, far away from the second raceway, of the outer ring ball blocking block.

6. The slewing bearing with the three rings and the two rows of the different diameters as claimed in claim 1, wherein: a first inner ring threaded hole is axially formed in the mounting surface of the first inner ring; and an outer ring positioning hole is formed in the outer ring.

7. The slewing bearing with the three rings and the two rows of the different diameters as claimed in claim 6, wherein: the three-ring double-row reducing slewing bearing is applied to a non-power bogie of an urban rail transit vehicle, the outer ring is installed on the bogie of a front carriage through an outer ring positioning hole by a second bolt, and the first inner ring is installed on the bogie of a rear carriage through a first inner ring threaded hole by a first bolt.

8. The slewing bearing with the three rings and the two rows of the different diameters as claimed in claim 1, wherein: an oil way is arranged in the second inner ring and comprises an oil inlet hole, a first oil outlet and a second oil outlet; the first oil outlet is parallel to the second oil outlet, the first oil outlet is communicated with the first rolling way, and the second oil outlet is communicated with the second rolling way.

9. The three-ring double-row reducing slewing bearing according to claim 8, wherein: the oil inlet holes are arranged in two numbers, one oil inlet hole is arranged on the end face of the second inner ring, the other oil inlet hole is arranged on the circular face, close to the first inner ring, of the second inner ring, and the two oil inlet holes are filled with oil through oil cups.

10. The slewing bearing with the three rings and the two rows of the different diameters as claimed in claim 1, wherein: the bearing adopts an integral galvanizing process.

Technical Field

The invention belongs to the technical field of assembly and manufacture of slewing bearing, and particularly relates to a three-ring double-row reducing slewing bearing.

Background

On the non-power bogie of the urban rail transit vehicle, a double-ring slewing bearing is originally used, an outer ring is used for being connected with a front vehicle body, an inner ring is used for being connected with a rear vehicle body, and the outer ring and the inner ring bear larger axial force, radial force and overturning moment, so that the bearing is stressed unevenly, the bearing has a clamping stagnation phenomenon in the operation process, the safety coefficient is low, and the service life is short.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a three-ring double-row reducing slewing bearing which can improve the bearing capacity of the bearing and buffer the larger impact force between a vehicle body and a bogie.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the three-ring double-row reducing slewing bearing comprises an outer ring, a first inner ring, a second inner ring, a first rolling way, a second rolling way, a first row of steel balls and a second row of steel balls; the second inner ring is positioned between the outer ring and the first inner ring, and a first raceway is arranged on the end surface of the first inner ring corresponding to the second inner ring; a second raceway is arranged on the end surface of the outer ring corresponding to the second inner ring; the first rolling path and the second rolling path are distributed along the axial direction in a staggered manner, a first row of steel balls are assembled in the first rolling path, and a second row of steel balls are assembled in the second rolling path.

Furthermore, a first sealing ring is arranged at the joint part of the first inner ring and the second inner ring, and a second sealing ring is arranged at the joint part of the outer ring and the second inner ring.

Furthermore, a first isolation block is arranged between two adjacent steel balls in the first row of steel balls, and a second isolation block is arranged between two adjacent steel balls in the second row of steel balls.

Furthermore, an outer ring filling hole for assembling a second row of steel balls is radially formed in the outer ring, an outer ring ball blocking block is arranged in the outer ring filling hole, and the outer ring ball blocking block is fixed through an outer ring pin; and an inner ring filling hole for assembling a first row of steel balls is radially formed in the first inner ring, an inner ring ball blocking block is arranged in the inner ring filling hole, and the inner ring ball blocking block is fixed through an inner ring pin.

Furthermore, one end, far away from the first raceway, of the inner ring ball plugging block is provided with a first threaded hole, and one end, far away from the second raceway, of the outer ring ball plugging block is provided with a second threaded hole.

Further, a first inner ring threaded hole is axially formed in the mounting surface of the first inner ring; and an outer ring positioning hole is formed in the outer ring.

Furthermore, the three-ring double-row reducing slewing bearing is applied to a non-power bogie of an urban rail transit vehicle, the outer ring is installed on the bogie of the front carriage through an outer ring positioning hole by a second bolt, and the first inner ring is installed on the bogie of the rear carriage through a first inner ring threaded hole by a first bolt.

Furthermore, an oil way is arranged in the second inner ring, and comprises an oil inlet hole, a first oil outlet and a second oil outlet; the first oil outlet is parallel to the second oil outlet, the first oil outlet is communicated with the first rolling way, and the second oil outlet is communicated with the second rolling way.

Furthermore, the second inner ring is provided with an axial threaded hole, the first inner ring and the outer ring are arranged on a power bogie, the main function of the second inner ring is to connect the vehicle body with the bogie, the second inner ring is arranged on a non-power bogie, and the main function of the second inner ring is to connect the two vehicle bodies with the bogie and bear the weight of the vehicle body and the connection load between the vehicle bodies.

Furthermore, two oil inlet holes are formed, one oil inlet hole is formed in the end face of the second inner ring, the other oil inlet hole is formed in the circular face, close to the first inner ring, of the second inner ring, and the two oil inlet holes are filled with oil through oil cups.

Further, the inner diameter of the first inner ring is provided with a limiting inclined plane.

Further, the bearing adopts an integral galvanizing process.

The invention has the beneficial effects that: the bearing structure can be applied to non-power bogies of urban rail transit vehicles, has the main functions of connecting two vehicle bodies with the bogies, bearing the weight of the vehicle bodies and the connecting load between the vehicle bodies, simultaneously bearing the axial force, the radial force and the overturning moment between the vehicle bodies and the bogies by the three-ring slewing bearing, avoiding the clamping stagnation phenomenon in the running process of the bearing, improving the safety factor and prolonging the service life of the bearing.

Drawings

FIG. 1 is a schematic structural view of the present invention;

in the figure: 1. the bearing comprises an outer ring, 2, a first inner ring, 3, a second inner ring, 4, a first raceway, 5, a second raceway, 6, a first row of steel balls, 7, a second row of steel balls, 8, a first sealing ring, 9, a second sealing ring, 10, a first isolation block, 11, a second isolation block, 12, an outer ring filling hole, 13, an outer ring ball blocking block, 14, an outer ring pin, 15, an inner ring filling hole, 16, an inner ring ball blocking block, 17, an inner ring pin, 18, a first threaded hole, 19, a second threaded hole, 20, a first inner ring threaded hole, 22, an outer ring positioning hole, 23, an oil inlet hole, 24, a first oil outlet, 25, a second oil outlet, 27 and an oil cup.

Detailed Description

In order to make the structure and function of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention.

Referring to the attached drawing 1, the three-ring double-row reducing slewing bearing comprises an outer ring 1, a first inner ring 2, a second inner ring 3, a first raceway 4, a second raceway 5, a first row of steel balls 6, a second row of steel balls 7, a first sealing ring 8, a second sealing ring 9, a first isolation block 10, a second isolation block 11, an outer ring filling hole 12, an outer ring ball blocking block 13, an outer ring pin 14, an inner ring filling hole 15, an inner ring ball blocking block 16, an inner ring pin 17, a first threaded hole 18, a second threaded hole 19, a first inner ring threaded hole 20, an outer ring positioning hole 22, an oil inlet hole 23, a first oil outlet 24 and a second oil outlet 25; the second inner ring 3 is positioned between the outer ring 1 and the first inner ring 2, and a first raceway 4 is arranged on the end surface of the first inner ring 2 corresponding to the second inner ring 3; a second raceway 5 is arranged on the end surface of the outer ring 1 corresponding to the second inner ring 3; the first rolling path 4 and the second rolling path 5 are distributed along the axial direction in a staggered manner, a first row of steel balls 6 are arranged in the first rolling path 4, and a second row of steel balls 7 are arranged in the second rolling path 5.

Based on the technical scheme, the two rows of rolling bodies are distributed in different central diameters and are not on the same horizontal plane at the same time, and can bear forces in two directions, wherein the second inner ring is used as the outer ring of the first row of rolling bodies and also used as the inner ring of the second row of rolling bodies and can bear the forces in two directions.

Furthermore, a first sealing ring 8 is arranged at the joint of the first inner ring 2 and the second inner ring 3, and a second sealing ring 9 is arranged at the joint of the outer ring 1 and the second inner ring 3; the first sealing ring 8 and the second sealing ring 9 play a role in sealing the three-ring double-row reducing slewing bearing; the first sealing ring 8 and the second sealing ring 9 are both installed in a radial direction, and are convenient to replace.

A first isolation block 10 is arranged between two adjacent steel balls in the first row of steel balls 6, and a second isolation block 11 is arranged between two adjacent steel balls in the second row of steel balls 7; because the friction between the steel balls is reduced due to the existence of the first isolation block 10 and the second isolation block 11, the isolation blocks are used as the retainers in the two rows of rolling bodies, and the isolation blocks drive the rolling bodies to run, so that the phenomenon of bearing clamping stagnation is avoided, and the rotation flexibility of the rolling bodies is ensured.

An outer ring filling hole 12 for assembling a second row of steel balls is arranged in the outer ring 1 in the radial direction, the outer ring filling hole 12 is perpendicular to the second roller path 5, an outer ring ball blocking block 13 is arranged in the outer ring filling hole 12, and the outer ring ball blocking block is fixed through an outer ring pin 14 through the outer ring pin 13; the outer race pin 14 is preferably a conical pin. An inner ring filling hole 15 for assembling a first row of steel balls is formed in the first inner ring 2 in the radial direction, the inner ring filling hole 15 is perpendicular to the first roller path 4, an inner ring ball blocking block 16 is arranged in the inner ring filling hole 15, and the inner ring ball blocking block 16 is fixed through an inner ring pin 17; the inner ring pin 17 is preferably a conical pin.

A first threaded hole 18 is radially formed in one end, far away from the first raceway 4, of the inner ring ball blocking block 16, and a second threaded hole 19 is radially formed in one end, far away from the second raceway 5, of the outer ring ball blocking block 13; the first threaded hole 18 is used for disassembling the inner ring ball blocking block 16, and the second threaded hole 19 is used for disassembling the outer ring ball blocking block 13; the first threaded hole 18 and the second threaded hole 19 are used for facilitating the disassembly of the ball blocking block, and are beneficial to checking whether the quality of the raceway and the steel ball is damaged or not.

A first inner ring threaded hole 20 is axially formed in the mounting surface of the first inner ring 2, at least one first inner ring threaded hole 20 is formed, and when a plurality of first inner ring threaded holes 20 are formed, the first inner ring threaded holes are symmetrically distributed on the mounting surface of the first inner ring 2; the first inner ring threaded hole 20 is used for fixing the first inner ring 2; the mounting surface of the first inner ring 2 is an axial end surface of the first inner ring 2; the first inner ring 2 can bear larger radial force after being fixed through the first inner ring threaded hole 20; one or more outer ring positioning holes 22 are formed in the flange surface of the outer ring 1, when the number of the outer ring positioning holes 22 is multiple, the outer ring positioning holes 22 are symmetrically distributed on the flange surface of the outer ring 1, and the outer ring positioning holes 22 are used for positioning the outer ring 1. The second inner ring 3 is provided with an axial threaded hole, the first inner ring and the outer ring are arranged on a power bogie, the main function of the second inner ring is to connect the bogie with the vehicle body, the second inner ring is arranged on a non-power bogie, and the main function of the second inner ring is to connect the bogie with the two vehicle bodies and bear the weight of the vehicle body and the connection load between the vehicle bodies.

An oil way is arranged in the second inner ring 3, and comprises an oil inlet hole 23, a first oil outlet 24 and a second oil outlet 25; the first oil outlet 24 is parallel to the second oil outlet 25, the first oil outlet 24 is communicated with the first rolling way 4, and the second oil outlet 25 is communicated with the second rolling way 5; the two oil inlet holes are arranged, one oil inlet hole is arranged on the end face of the second inner ring, the other oil inlet hole is arranged on the circular face, close to the first inner ring, of the second inner ring, when the bearing leaves a factory, the two oil inlet holes are blocked through the threaded plug, when oil needs to be filled, the threaded plug is pulled down, oil is filled through the oil cup, and the two oil inlet holes are filled through the oil cup; when in use, the oil cup 13 is required to be used for injecting grease through the oil inlet 23, so that the bearing is conveniently lubricated, the bearing can be fully lubricated, and the service life of the bearing is prolonged. The second inner ring is used as the outer ring of the first row of steel balls and the inner ring of the second row of steel balls, and the turntable only swings by 12.5 degrees in the operation process, so that 80% of lubricating grease is filled in the middle, an oil cup is used in a normal environment, a small amount of grease is injected through an oil path, no maintenance is needed, and the grease injection period is not less than 6 months.

Further, the inner diameter of the first inner ring is provided with a limiting inclined plane. The bearing fixing device is used for limiting and fixing during bearing assembly.

The slewing bearing works in an exposed environment, the exposed metal surface of the slewing bearing is subjected to zinc spraying treatment according to ISO 2063, the corrosion resistance of the slewing bearing is ensured, the slewing bearing integrates high bearing capacity under extreme load conditions, can buffer large impact force between a vehicle body and a bogie, can work in severe environments such as the altitude of 2500 meters, the ambient temperature of minus 25 to plus 60 ℃, and can withstand wind, rain, ice, frost and the like, and is a key component on the bogie.

The materials used for the outer ring 1, the first inner ring 2 and the second inner ring 3 of the three-ring slewing bearing are 42CrMo4V-EN 10083, and the materials are required to be subjected to quenching and tempering in the product processing process, so that the toughness and the strength of steel are improved, the three-ring slewing bearing has good impact resistance in the operation process, and the service life of the three-ring slewing bearing is prolonged.

The three-ring slewing bearing is applied to a non-power bogie of an urban rail transit vehicle, the outer ring 1 is installed on the bogie of a front carriage through an outer ring positioning hole 22 by a second bolt, and the first inner ring 2 is installed on the bogie of a rear carriage through a first inner ring threaded hole 20 by a first bolt.

The working principle is as follows: on the non-power bogie of the urban rail transit vehicle, two loops are used for circularly supporting HSB847-DTZ, an outer ring is used for connecting a front vehicle body, an inner ring is used for connecting a rear vehicle body, the outer ring bears 121KN axial force, 288KN radial force and 72.2KN overturning moment, the inner ring bears 121KN axial force, 288KN radial force and 61KN overturning moment, the stress of the overall bearing is large, a turntable bearing capacity checking calculation program is used for calculation, the strength of a ferrule can only reach 1.5 (the theoretical requirement is 1.3), the bearing adopts a fully-installed rolling body structure, and the clamping stagnation phenomenon exists in the bearing operation process. The novel three-ring double-row reducing slewing bearing provided by the invention adopts three ferrules and two rows of rolling bodies, the radial force, the axial force and the overturning moment borne by the bearing are distributed on the three ferrules, the strength coefficient of the ferrules is improved to 2.0 by adopting a novel design scheme, the service life of the bearing reaches more than 200 kilometers, the problems that the safety coefficient of the bearing is low, the service life of the bearing cannot meet the requirement are solved, and the maintenance-free period of an urban rail transit vehicle is prolonged.

The above list is only the preferred embodiment of the present invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.