Speed reducer with high sealing performance

Abstract

The utility model relates to the technical field of speed reducer shaft seals, in particular to a high-sealing-performance speed reducer which comprises a cover body, a clamping cover structure, a shaft structure and a clamping cover structure, a fourth sealing ring abuts against and is attached to a first clamping ring, a backing ring abuts against and is attached to a first sealing ring, and the inner wall of a second sealing ring abuts against and is in contact with a shaft body. The inner wall of the third sealing ring abuts against and is attached to the second clamping ring, the rear end of the silica gel pad abuts against and is attached to the interior of the front end of the housing, the rear end of the hard rubber ring abuts against an annular groove formed in the front end of the annular cover in an embedded mode, and the interior of the annular cover, the interior of the silica gel pad and the interior of the front end of the housing are all in threaded assembly with an external stud. By means of the arrangement, the abutting and attaching effect between the fourth sealing ring and the first clamping ring and the abutting and attaching effect between the backing ring and the first sealing ring are improved, and the high sealing state of the shaft body in the rotating working state is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of reducer shaft seals, in particular to a high-sealability reducer. Background Art

[0002] The reducer is usually used in conjunction with a lubricating oil circulation system to reduce the transmission wear between the internal driving parts of the reducer through the infiltration of lubricating oil. After the reducer is used for a long time, the output shaft of the reducer is prone to lubricating oil leakage.

[0003] Some reducer shaft ends adopt an extrusion-type contact sealing structure of a sealing ring and a ring. When the shaft rotates in the working state, long-term use will reduce the contact sealing effect of the sealing ring and the ring. Therefore, a high-sealing reducer is proposed to address the above problem. Summary of the Invention

[0004] The purpose of the utility model is to provide a high-sealing reducer, which is used to solve the problem that the extrusion-type contact sealing structure of the sealing ring and the ring at the shaft end of some reducers will reduce the contact sealing effect of the sealing ring and the ring after long-term use when the shaft is rotating.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A high-sealing reducer includes a cover body, a card cover structure, a shaft structure and a clamping cover structure. The front end of the cover body is provided with a card cover structure, the inside of the cover body and the card cover structure are provided with a shaft structure, and a clamping cover structure is provided between the cover body, the card cover structure and the shaft structure. The cover body includes a cover shell and a first sealing ring, the inside of the cover shell is fixedly provided with the first sealing ring, the card cover structure includes a ring cover, a hard rubber ring, a second sealing ring, a third sealing ring, a silicone pad, an air cylinder, an assembly part and a hard silicone plate, and the rear end of the ring cover is fixedly provided with a hard rubber ring The inner wall of the front end cylinder of the ring cover is fixedly provided with a second sealing ring and a third sealing ring, the front end of the silicone pad is fixedly provided with the ring cover, the top of the ring cover is fixedly connected with an air cylinder, the bottom end of the assembly part is fixedly provided with a hard silicone plate, the air cylinder and the assembly part are assembled, the shaft structure includes a shaft body, a first clamping ring and a second clamping ring, the outside of the shaft body is fixedly provided with a first clamping ring and a second clamping ring, the clamping cover structure includes a ring cover, a fourth sealing ring and a gasket, the inner wall of the ring cover is fixedly provided with a fourth sealing ring, and the rear end of the ring cover is fixedly provided with a gasket.

[0007] Preferably, in the assembly structure of the cover body, the shaft structure and the clamping cover structure, the clamping cover structure is installed on the outside of the shaft structure, the rear end of the ring cover is in contact with the front end of the cover shell, the fourth sealing ring is in contact with the first retaining ring, and the gasket is in contact with the first sealing ring.

[0008] Preferably, in the assembly structure of the card cover structure and the shaft structure, the inner wall of the second sealing ring is in contact with the shaft body, and the inner wall of the third sealing ring is in contact with the second retaining ring.

[0009] Preferably, in the assembly structure of the cover body, the card cover structure and the clamp cover structure, the rear end of the silicone pad is in contact with the interior of the front end of the cover shell, the interior of the ring cover, the interior of the silicone pad and the interior of the front end of the cover shell are all assembled with the external stud thread, and the rear end of the hard rubber ring is in contact with the front end of the ring cover through a ring groove.

[0010] Preferably, in the assembly structure of the air cylinder and the assembly part, the inside of the assembly part top cover is threadedly assembled with the outside of the top of the air cylinder, and the hard silicone plate fits and slides against the inner wall of the air cylinder.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. In the present invention, the card cover structure, the clamping cover structure and the shaft structure are assembled, and at the same time, an air cylinder and an assembly part are provided to squeeze the air inside the cavity between the card cover structure, the shaft structure and the clamping cover structure to increase the air pressure. Through the above arrangement, the interference and fitting effect between the fourth sealing ring and the first clamping ring is improved, and the interference and fitting effect between the backing ring and the first sealing ring is improved, thereby ensuring a high sealing state when the shaft body is rotating in the working state;

[0013] 2. In the present invention, the clamping cover structure is installed on the outside of the shaft structure, the rear end of the ring cover is in contact with the front end of the cover shell, the fourth sealing ring is in contact with the first retaining ring, and the gasket is in contact with the first sealing ring, which are used for preliminary assembly of the clamping cover structure. The inner wall of the second sealing ring is in contact with the shaft body, the inner wall of the third sealing ring is in contact with the second retaining ring, the rear end of the silicone pad is in contact with the inside of the front end of the cover shell, the rear end of the hard rubber ring is in contact with the front end of the ring cover, and the ring groove is provided in the inside of the ring cover and is in contact with the inside of the ring cover, the inside of the ring cover, the inside of the silicone pad and the inside of the front end of the cover shell are all assembled with the external stud threads. Through the above arrangement, the clamping cover structure can be clamped and limited at the same time during the assembly process of the card cover structure to form a composite sealing structure that is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the device components of the present utility model;

[0016] Figure 3 This is a schematic diagram of the clamping cover structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the card cover structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the assembly cross-sectional structure of the device components of the utility model;

[0019] Figure 6 For this utility model Figure 5 Schematic diagram of the structure at point A.

[0020] In the figure: 1. cover body; 11. cover shell; 12. first sealing ring; 2. card cover structure; 21. ring cover; 22. hard rubber ring; 23. second sealing ring; 24. third sealing ring; 25. silicone pad; 26. air cylinder; 27. assembly part; 28. hard silicone plate; 3. shaft structure; 31. shaft body; 32. first clamping ring; 33. second clamping ring; 4. clamping cover structure; 41. ring cover; 42. fourth sealing ring; 43. gasket. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the embodiments of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Similarly, similar words such as "one", "an", or "the" do not indicate a quantitative limitation, but rather indicate the presence of at least one. Similar words such as "include" or "comprises" mean that the element or object appearing before the word covers the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0023] In addition, in the embodiments of the present invention, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] See also Figure 1-6 , the utility model provides a technical solution:

[0025] A high-sealing reducer includes a cover body 1, a card cover structure 2, a shaft structure 3 and a clamping cover structure 4. The cover body 1 is provided with a card cover structure 2 at the front end, and the cover body 1 and the card cover structure 2 are provided with a shaft structure 3. A clamping cover structure 4 is provided between the cover body 1, the card cover structure 2 and the shaft structure 3. The cover body 1 includes a cover shell 11 and a first sealing ring 12. The first sealing ring 12 is fixedly provided inside the cover shell 11. The card cover structure 2 includes a ring cover 21, a hard rubber ring 22, a second sealing ring 23, a third sealing ring 24, a silicone pad 25, an air cylinder 26, an assembly part 27 and a hard silicone plate 28. The hard rubber ring 22 is fixedly provided at the rear end of the ring cover 21. The second sealing ring 23 and the third sealing ring 24 are fixedly provided on the inner wall of the front end cylinder of the ring cover 21, the front end of the silicone pad 25 is fixedly provided with the ring cover 21, the top of the ring cover 21 is fixedly connected with the air cylinder 26, and the bottom end of the assembly part 27 is fixedly provided with a hard silicone plate 28. The air cylinder 26 and the assembly part 27 are assembled. The shaft structure 3 includes a shaft body 31, a first retaining ring 32 and a second retaining ring 33. The outside of the shaft body 31 is fixedly provided with a first retaining ring 32 and a second retaining ring 33. The clamping cover structure 4 includes a ring cover 41, a fourth sealing ring 42 and a gasket 43. The inner wall of the ring cover 41 is fixedly provided with a fourth sealing ring 42, and the rear end of the ring cover 41 is fixedly provided with a gasket 43.

[0026] In the assembly structure of the cover body 1, the shaft structure 3 and the clamping cover structure 4, the clamping cover structure 4 is installed on the outside of the shaft structure 3, the rear end of the ring cover 41 is in contact with the front end of the cover shell 11, the fourth sealing ring 42 is in contact with the first retaining ring 32, and the gasket 43 is in contact with the first sealing ring 12. Through the above arrangement, it is convenient to assemble and install the cover body 1, the shaft structure 3 and the clamping cover structure 4.

[0027] In the assembly structure of the card cover structure 2 and the shaft structure 3, the inner wall of the second sealing ring 23 is in contact with the shaft body 31, and the inner wall of the third sealing ring 24 is in contact with the second retaining ring 33. Through the above arrangement, the card cover structure 2 and the shaft structure 3 are easily assembled and installed.

[0028] In the assembly structure of the cover body 1, the card cover structure 2 and the clamping cover structure 4, the rear end of the silicone pad 25 is in contact with the inner front end of the cover shell 11, the interior of the ring cover 21, the interior of the silicone pad 25 and the inner front end of the cover shell 11 are all assembled with the external stud threads, and the rear end of the hard rubber ring 22 is in contact with the front end of the ring cover 41 through the ring groove. Through the above arrangement, it is convenient to assemble and install the cover body 1, the card cover structure 2 and the clamping cover structure 4.

[0029] In the assembly structure of the air cylinder 26 and the assembly part 27, the inner part of the top cover of the assembly part 27 is threadedly assembled with the outer side of the top of the air cylinder 26, and the hard silicone plate 28 slides in contact with the inner wall of the air cylinder 26. Through the above arrangement, it is convenient to assemble and install the air cylinder 26 and the assembly part 27.

[0030] Workflow: The utility model provides a high-sealing and oil-proof assembly structure for the output shaft end of the reducer, which is convenient for assembling the card cover structure 2, the clamping cover structure 4 and the shaft structure 3, and at the same time, the air cylinder 26 and the assembly part 27 are used to squeeze the Figure 6 The air inside the cavity between the card cover structure 2, the shaft structure 3 and the clamping cover structure 4 shown is used to increase the air pressure, improve the contact and fit effect between the fourth sealing ring 42 and the first clamping ring 32, improve the contact and fit effect between the gasket 43 and the first sealing ring 12, and ensure a high sealing state when the shaft body 31 is in a rotating working state.

[0031] When the device structure is assembled, the clamping cover structure 4 is installed on the outside of the shaft structure 3, the rear end of the ring cover 41 is in contact with the front end of the cover shell 11, the fourth sealing ring 42 is in contact with the first retaining ring 32, and the gasket 43 is in contact with the first sealing ring 12, which is used for preliminary assembly of the clamping cover structure 4.

[0032] The inner wall of the second sealing ring 23 is in contact with the shaft body 31, the inner wall of the third sealing ring 24 is in contact with the second clamping ring 33, the rear end of the silicone pad 25 is in contact with the inside of the front end of the cover shell 11, and the rear end of the hard rubber ring 22 is in contact with the ring groove provided in the front end of the ring cover 41. The interior of the ring cover 21, the interior of the silicone pad 25 and the interior of the front end of the cover shell 11 are all assembled with the external stud threads. Through the assembly process of the card cover structure 2, the clamping cover structure 4 can be clamped and limited at the same time to form a composite sealing structure that is easy to assemble.

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

Claims

1. A high-sealing reducer, comprising a housing (1), a cover structure (2), a shaft structure (3) and a clamping cover structure (4), characterized in that: The front end of the cover body (1) is provided with a card cover structure (2), the inside of the cover body (1) and the card cover structure (2) are provided with an axis structure (3), and a clamping cover structure (4) is provided between the cover body (1), the card cover structure (2) and the axis structure (3). The cover body (1) includes a cover shell (11) and a first sealing ring (12), the inside of the cover shell (11) is fixedly provided with the first sealing ring (12), the card cover structure (2) includes a ring cover (21), a hard rubber ring (22), a second sealing ring (23), a third sealing ring (24), a silicone pad (25), an air cylinder (26), an assembly part (27) and a hard silicone plate (28), the rear end of the ring cover (21) is fixedly provided with a hard rubber ring (22), and the inner wall of the front end of the ring cover (21) is fixedly provided with a third sealing ring (24). The second sealing ring (23) and the third sealing ring (24) are provided. The front end of the silicone pad (25) is fixedly provided with the ring cover (21). The top end of the ring cover (21) is fixedly connected with the air cylinder (26). The bottom end of the assembly part (27) is fixedly provided with a hard silicone plate (28). The air cylinder (26) and the assembly part (27) are assembled. The shaft structure (3) includes a shaft body (31), a first snap ring (32) and a second snap ring (33). The first snap ring (32) and the second snap ring (33) are fixedly provided on the outer side of the shaft body (31). The clamping cover structure (4) includes a ring cover (41), a fourth sealing ring (42) and a gasket (43). The inner wall of the ring cover (41) is fixedly provided with the fourth sealing ring (42). The rear end of the ring cover (41) is fixedly provided with the gasket (43).

2. The high-sealing reducer according to claim 1, characterized in that: In the assembly structure of the cover body (1), the shaft structure (3) and the clamping cover structure (4), the clamping cover structure (4) is installed on the outside of the shaft structure (3), the rear end of the ring cover (41) is in contact with and fits with the front end of the cover shell (11), the fourth sealing ring (42) is in contact with and fits with the first retaining ring (32), and the gasket (43) is in contact with and fits with the first sealing ring (12).

3. The high-sealing reducer according to claim 1, characterized in that: In the assembly structure of the card cover structure (2) and the shaft structure (3), the inner wall of the second sealing ring (23) is in contact with the shaft body (31), and the inner wall of the third sealing ring (24) is in contact with the second retaining ring (33).

4. The high-sealing reducer according to claim 1, characterized in that: In the assembly structure of the cover body (1), the card cover structure (2) and the clamp cover structure (4), the rear end of the silicone pad (25) is in contact with the interior of the front end of the cover shell (11), the interior of the ring cover (21), the interior of the silicone pad (25) and the interior of the front end of the cover shell (11) are all threadedly assembled with the external stud, and the rear end of the hard rubber ring (22) is in contact with the ring groove provided in the front end of the ring cover (41).

5. The high-sealing reducer according to claim 1, characterized in that: In the assembly structure of the air cylinder (26) and the assembly part (27), the interior of the top cover of the assembly part (27) is threadedly assembled with the outer side of the top of the air cylinder (26), and the hard silicone plate (28) is fitted and slid with the inner wall of the air cylinder (26).

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