High-precision low-friction bearing

Abstract

The utility model relates to the technical field of crossheads, in particular to a high-precision low-friction bearing which comprises a fixing bolt and a shell assembly, the shell assembly is fixedly connected with a first dust blocking plate through the fixing bolt, the shell assembly is fixedly connected with a second dust blocking plate through the fixing bolt, and one side of the shell assembly is fixedly connected with a resistance reducing assembly. The outer shell assembly comprises a bearing outer shell, a bearing inner plate is fixedly connected to the inner side of the bearing outer shell, the bearing inner plate is arranged on the outer side of a bearing inner shell in a sleeved mode, a roller shaft column is fixedly connected to the outer side of the bearing inner shell, and a fixed inner rod is fixedly connected to one side of the bearing inner plate. Meanwhile, when the rotating roller body rotates, the hollow steel balls and the limiting balls rotate at the same time, the movement range of the rotating roller body is limited, the precision of the device is improved, meanwhile, friction force generated when the rotating roller body moves is reduced, the flexibility of the bearing is improved, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of crossheads, and specifically relates to a high-precision and low-friction bearing. Background Technique

[0002] The cross shaft, also known as the crosshead pin or the universal coupling shaft, is a part in mechanical engineering. It is usually used to connect two rotating components and transmit torque. The design of the cross shaft enables it to transmit power in multiple directions while allowing a certain amount of axial, radial, or angular displacement.

[0003] To improve the accuracy of the bearing of the cross shaft, the existing device sets an inner ring to limit the movement range of the roller shaft, so as to achieve the effect of improving the bearing accuracy. However, it will increase the friction when the roller shaft rotates and reduce the flexibility of the bearing. Therefore, a high-precision and low-friction bearing is proposed for the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a high-precision and low-friction bearing to solve the problem that in order to improve the accuracy of the bearing of the cross shaft, the existing device sets an inner ring to limit the movement range of the roller shaft, so as to achieve the effect of improving the bearing accuracy, but it will increase the friction when the roller shaft rotates.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-precision and low-friction bearing includes fixing bolts and a housing assembly. The housing assembly is fixedly connected with a first dust-proof plate through the fixing bolts, and the housing assembly is fixedly connected with a second dust-proof plate through the fixing bolts. A drag reduction assembly is fixedly connected to one side of the housing assembly. The housing assembly includes a bearing housing. The inner side of the bearing housing is fixedly connected with a bearing inner plate. The bearing inner plate is sleeved outside the bearing inner shell. The outside of the bearing inner shell is fixedly connected with roller shafts. One side of the bearing inner plate is fixedly connected with a fixed inner shaft. The outside of the fixed inner shaft is rotatably connected with hollow steel balls. A sealing ring is fixedly connected to the outside of the fixed inner shaft. A limiting ring is fixedly connected to one side of the fixed inner shaft. Lubricating oil grooves are opened on the inner sides of the hollow steel balls. The drag reduction assembly includes a partition plate. Hemispherical grooves are opened on the inner side of the partition plate. A column rod is fixedly connected to the inner side of the hemispherical groove. A limiting ball is rotatably connected to the outside of the column rod. An installation through groove is opened on the inner side of the limiting ball. The outside of the limiting ball is attached to the outside of the roller body.

[0007] As a further optimized content of the present utility model, among them: The number of the fixing bolts is several. Threaded holes are opened on the inner sides of the first dust-proof plate and the second dust-proof plate. The threaded holes on the inner sides of the first dust-proof plate and the second dust-proof plate correspond to the fixing bolts one by one.

[0008] As a further optimized content of the present utility model, wherein: the second dust blocking plate has the same shape as the first dust blocking plate, the inner side of the second dust blocking plate is hollowed out, the outer side of the second dust blocking plate fits with the inner side of the bearing housing, and the outer side of the first dust blocking plate fits with the inner side of the bearing housing.

[0009] As a further optimized content of the present utility model, wherein: the bearing inner plate is in the shape of a hollow cylinder, there is a distance of more than one millimeter between the bearing inner plate and the bearing inner shell, and there is a distance of more than one millimeter between the bearing inner plate and the roller shaft column.

[0010] As a further optimized content of the present utility model, wherein: the number of the roller shaft columns is two, the inner side of the roller shaft column is hollowed out, the roller shaft columns are symmetrically fixed at the front end and the rear end of the bearing inner shell, and a rotating groove is opened on the inner side of the roller shaft column.

[0011] As a further optimized content of the present utility model, wherein: the fixed inner stem is in the shape of a cylinder, the limiting ring is in the shape of a cylinder, the outer side of the sealing ring fits with the inner side of the inner hollow steel ball, the side shape of the lubricating oil groove is opened in a T shape, hydraulic oil is arranged inside the lubricating oil groove, and the fixed inner stem, the inner hollow steel ball, the sealing ring and the limiting ring are all fixedly connected to one side of the second dust blocking plate and the first dust blocking plate.

[0012] As a further optimized content of the present utility model, wherein: one side of the partition plate is fixedly connected to one side of the bearing inner plate, the hemispherical groove is opened in a partial spherical shape, the column rod is in the shape of a cylinder, the limiting ball is in the shape of a sphere, the installation through groove is opened in a cylindrical shape, and the rotating roller body is arranged between the inner hollow steel ball and the limiting ball.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] In the present utility model, through the arranged housing assembly, the first dust blocking plate, the second dust blocking plate and the drag reduction assembly, the device squeezes the rotating roller body between two inner hollow steel balls. At the same time, when the rotating roller body rotates, the inner hollow steel ball and the limiting ball rotate simultaneously, restricting the movement range of the rotating roller body, not only improving the precision of the device, but also reducing the friction generated when the rotating roller body moves, and improving the flexibility and service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the structure of the first dust blocking plate of the present utility model;

[0017] Figure 3 is a schematic diagram of the structure of the second dust blocking plate of the present utility model;

[0018] Figure 4 Structural schematic diagram of the drag reduction component of the present utility model;

[0019] Figure 5 Structural schematic diagram of the bearing housing of the present utility model;

[0020] Figure 6 Structural schematic diagram of the hollow steel ball of the present utility model.

[0021] In the figure: 1. Fixed bolt; 2. Housing assembly; 21. Bearing housing; 22. Bearing inner plate; 23. Bearing inner shell; 24. Roller column; 25. Fixed inner stem; 26. Hollow steel ball; 27. Sealing ring; 28. Limit ring; 29. Lubricating oil groove; 3. First dust-proof plate; 4. Second dust-proof plate; 5. Drag reduction component; 51. Partition; 52. Hemispherical groove; 53. Column rod; 54. Limit ball; 55. Installation through groove; 56. Rotating roller body. Specific implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] Please refer to Figure 1-6 , the present utility model provides a technical solution:

[0025] A high-precision and low-friction bearing, comprising a fixing bolt 1 and a housing assembly 2. The housing assembly 2 is fixedly connected with a first dust-proof plate 3 through the fixing bolt 1, and the housing assembly 2 is fixedly connected with a second dust-proof plate 4 through the fixing bolt 1. One side of the housing assembly 2 is fixedly connected with a drag reduction assembly 5. The housing assembly 2 includes a bearing housing 21. The inner side of the bearing housing 21 is fixedly connected with a bearing inner plate 22. The bearing inner plate 22 is sleeved on the outer side of a bearing inner shell 23. The outer side of the bearing inner shell 23 is fixedly connected with a roller column 24. One side of the bearing inner plate 22 is fixedly connected with a fixed inner shaft 25. An inner hollow steel ball 26 is rotatably connected to the outer side of the fixed inner shaft 25. A sealing ring 27 is fixedly connected to the outer side of the fixed inner shaft 25. A limiting ring 28 is fixedly connected to one side of the fixed inner shaft 25. A lubricating oil groove 29 is formed in the inner side of the inner hollow steel ball 26. The drag reduction assembly 5 includes a partition plate 51. A hemispherical groove 52 is formed in the inner side of the partition plate 51. A column rod 53 is fixedly connected to the inner side of the hemispherical groove 52. A limiting ball 54 is rotatably connected to the outer side of the column rod 53. An installation through groove 55 is formed in the inner side of the limiting ball 54. The outer side of the limiting ball 54 is in contact with the outer side of a roller body 56.

[0026] As a further implementation of this solution, the number of fixing bolts 1 is several. Threaded holes are formed in the inner sides of both the first dust-proof plate 3 and the second dust-proof plate 4. The threaded holes in the inner sides of the first dust-proof plate 3 and the second dust-proof plate 4 correspond to the fixing bolts 1 one by one, facilitating the installation between the housing assembly 2, the first dust-proof plate 3 and the second dust-proof plate 4.

[0027] As a further implementation of this solution, the second dust-proof plate 4 has the same shape as the first dust-proof plate 3. The inner side of the second dust-proof plate 4 is hollow. The outer side of the second dust-proof plate 4 is in contact with the inner side of the bearing housing 21, and the outer side of the first dust-proof plate 3 is in contact with the inner side of the bearing housing 21, playing a role in limiting the front and rear direction range of the roller body 56.

[0028] As a further implementation of this solution, the shape of the bearing inner plate 22 is a hollow cylinder. There is a distance of more than one millimeter between the bearing inner plate 22 and the bearing inner shell 23, and there is a distance of more than one millimeter between the bearing inner plate 22 and the roller column 24, preventing the bearing inner plate 22 from contacting the roller column 24 and the bearing inner shell 23 to increase friction.

[0029] As a further implementation of this solution, the number of roller columns 24 is two. The inner sides of the roller columns 24 are hollow. The roller columns 24 are symmetrically fixed at the front end and the rear end of the bearing inner shell 23. Rotating grooves are formed in the inner sides of the roller columns 24, facilitating the installation of the roller body 56 on the grooves of the roller columns 24, so that the roller body 56 is in contact with the inner hollow steel balls 26 and the limiting balls 54.

[0030] As a further implementation of this solution, the shape of the fixed inner shaft 25 is a cylinder, the shape of the limiting ring 28 is a cylinder, the outer side of the sealing ring 27 fits with the inner side of the hollow steel ball 26, the side shape of the lubricating oil groove 29 is opened in a T shape, hydraulic oil is provided inside the lubricating oil groove 29, and both sides of the second dust-proof plate 4 and the first dust-proof plate 3 are fixedly connected with the fixed inner shaft 25, the hollow steel ball 26, the sealing ring 27 and the limiting ring 28, reducing the friction generated when the hollow steel ball 26 rotates, and at the same time reducing the friction generated when the roller body 56 rotates;

[0031] As a further implementation of this solution, one side of the partition plate 51 is fixedly connected with one side of the bearing inner plate 22, the shape of the hemispherical groove 52 is opened in a partial spherical shape, the shape of the column rod 53 is a cylinder, the shape of the limiting ball 54 is a sphere, the shape of the installation through groove 55 is opened in a cylinder shape, and the roller body 56 is arranged between the hollow steel ball 26 and the limiting ball 54, playing a role in limiting the movement track of the roller body 56, and further reducing the friction when the roller body 56 rotates.

[0032] Workflow: During the use of the device, the device is assembled. The roller body 56 is placed inside the groove of the roller shaft column 24. The roller shaft column 24 consists of two parts. The external part is fixed to the internal roller shaft column 24 by bolts, which facilitates placing the roller body 56 inside the groove of the hollow steel ball 26. At the same time, the roller body 56 is located between two column rods 53. One side of the roller body 56 is in contact with the hollow steel ball 26 provided on one side of the bearing inner plate 22. At this time, the other end of the roller shaft column 24 can be fixed by bolts. Then, the second dust-proof plate 4 and the first dust-proof plate 3 are fixed by fixing bolts 1. When fixing, the hollow steel balls 26 fixed on one side of the first dust-proof plate 3 and the second dust-proof plate 4 gradually press against the other side of the roller body 56. During use, the bearing inner housing 23 is installed outside one end of the cross shaft, and the bearing outer housing 21 is connected to an external object. When the bearing outer housing 21 rotates, the bearing outer housing 21 drives the bearing inner plate 22 to rotate. The bearing inner plate 22 is sleeved outside the bearing inner housing 23. When the bearing inner plate 22 rotates, it drives the bearing outer housing 21 and the fixed inner shaft 25 fixed on one side of the bearing inner plate 22 to rotate simultaneously. Since the outer side of the roller body 56 is in contact with the outer sides of the bearing outer housing 21 and the roller shaft column 24, the roller body 56 rotates. When the roller body 56 rotates, the hollow steel balls 26 rotate. The rotation direction of the roller body 56 is fixed. At this time, the hollow steel balls 26 are rotationally connected to the outside of the fixed inner shaft 25 through the limit ring 28. The inner side of the lubricating oil groove 29 is provided with hydraulic oil, which can reduce the friction between the hollow steel balls 26 and the fixed inner shaft 25. The outer side of the sealing ring 27 is in contact with the inner side of the hollow steel ball 26, which serves to seal the hydraulic oil inside the lubricating oil groove 29. The hollow steel balls 26 on both sides of the roller body 56 rotate simultaneously, which can reduce the friction at the front and rear ends of the roller body 56. The outer side of the roller body 56 is in contact with the outer side of the limit ball 54. The limit ball 54 serves to limit the movement trajectory of the roller body 56. At the same time, when the roller body 56 rotates, the limit ball 54 rotates inside the hemispherical groove 52 and outside the column rod 53, further reducing the friction when the roller body 56 rotates.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision, low-friction bearing, comprising a fixing bolt (1) and a housing assembly (2), characterized in that: The housing component (2) is fixedly connected to a first dust blocking plate (3) via a fixing bolt (1), the housing component (2) is fixedly connected to a second dust blocking plate (4) via a fixing bolt (1), a drag reduction component (5) is fixedly connected to one side of the housing component (2), the housing component (2) comprises a bearing housing (21), a bearing inner plate (22) is fixedly connected to the inner side of the bearing housing (21), the bearing inner plate (22) is sleeved on the outer side of the bearing inner housing (23), a roller column (24) is fixedly connected to the outer side of the bearing inner housing (23), a fixed inner stem (25) is fixedly connected to one side of the bearing inner plate (22), and the outer side of the fixed inner stem (25) is fixedly connected to the outer side of the bearing inner housing (23). An inner hollow steel ball (26) is rotatably connected, a sealing ring (27) is fixedly connected to the outer side of the fixed inner stem (25), a limiting ring (28) is fixedly connected to one side of the fixed inner stem (25), a lubricating oil groove (29) is provided on the inner side of the inner hollow steel ball (26), the drag reduction component (5) comprises a partition (51), a hemispherical groove (52) is provided on the inner side of the partition (51), a column (53) is fixedly connected to the inner side of the hemispherical groove (52), a limiting ball (54) is rotatably connected to the outer side of the column (53), a mounting through groove (55) is provided on the inner side of the limiting ball (54), and the outer side of the limiting ball (54) is in contact with the outer side of the roller body (56).

2. A high-precision, low-friction bearing according to claim 1, characterized in that: The number of the fixing bolts (1) is several, and threaded holes are provided on the inner sides of the first dust blocking plate (3) and the second dust blocking plate (4), and the threaded holes on the inner sides of the first dust blocking plate (3) and the second dust blocking plate (4) correspond one-to-one to the fixing bolts (1).

3. A high-precision, low-friction bearing according to claim 1, characterized in that: The second dust blocking plate (4) has the same shape as the first dust blocking plate (3); the inner side of the second dust blocking plate (4) is hollow; the outer side of the second dust blocking plate (4) is in contact with the inner side of the bearing housing (21); and the outer side of the first dust blocking plate (3) is in contact with the inner side of the bearing housing (21).

4. A high-precision, low-friction bearing according to claim 1, characterized in that: The bearing inner plate (22) is in the shape of a hollow cylinder, and a distance of more than one millimeter is set between the bearing inner plate (22) and the bearing inner shell (23), and a distance of more than one millimeter is set between the bearing inner plate (22) and the roller column (24).

5. The high-precision, low-friction bearing according to claim 1, characterized in that: There are two roller columns (24), the inner side of which is hollow, and the roller columns (24) are symmetrically fixed at the front and rear ends of the bearing inner shell (23). A rotation groove is provided on the inner side of the roller columns (24).

6. A high-precision, low-friction bearing according to claim 1, characterized in that: The fixed inner stem (25) is in the shape of a cylinder, the limiting ring (28) is in the shape of a cylinder, the outer side of the sealing ring (27) is in contact with the inner side of the inner hollow steel ball (26), the side surface of the lubricating oil groove (29) is in the shape of a T-shape, hydraulic oil is provided inside the lubricating oil groove (29), and the fixed inner stem (25), the inner hollow steel ball (26), the sealing ring (27) and the limiting ring (28) are fixedly connected to one side of the second dust blocking plate (4) and the first dust blocking plate (3).

7. The high-precision, low-friction bearing according to claim 1, characterized in that: One side of the partition (51) is fixedly connected to one side of the bearing inner plate (22); the hemispherical groove (52) is partially spherical; the column rod (53) is cylindrical; the limiting ball (54) is spherical; the mounting groove (55) is cylindrical; and the roller body (56) is arranged between the hollow steel ball (26) and the limiting ball (54).

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