Sealing device for output shaft of speed reducer

Abstract

The utility model relates to the technical field of speed reducers, and discloses a speed reducer output shaft sealing device which comprises a speed reducer shell and a speed reducer output shaft, the front end of the speed reducer shell is fixedly connected with an installation sleeve, and the driving end of the speed reducer output shaft is located in the installation sleeve. The rear end of the installation sleeve is connected with a first sealing sleeve through a sealing assembly, the outer wall of the first sealing sleeve is in threaded connection with the rear end of the inner wall of the speed reducer output shaft, the inner wall of the speed reducer output shaft is connected with an inner ring through an embedding assembly, and the inner ring is arranged on the outer wall of the speed reducer output shaft in a sleeving mode. According to the utility model, the two ends of the mounting sleeve provided with the output shaft of the speed reducer can be sealed, so that the sealing performance is improved, the connection tightness between the sealing sleeve I and the inner ring is increased, and the connection of the two layers of embedded teeth is matched, so that the possibility of oil leakage is further reduced, and the leakage risk is reduced; and the stability of the sealing structure is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reducers, in particular to a reducer output shaft sealing device. Background Art

[0002] A reducer, also known as a speed reducer, is an independent component composed of a gear drive, a worm drive, or a gear-worm drive enclosed in a rigid housing. It is often used as a reduction transmission device between the prime mover and the working machine. It matches the speed and transmits torque between the prime mover and the working machine or actuator. It is widely used in modern machinery. A sealing structure is usually installed between the reducer housing and the output shaft to reduce oil seepage.

[0003] After searching, a reducer output shaft sealing device with announcement number CN213361031U includes a reducer housing, a locking hole is opened on the side of the left end of the reducer housing, an outer sealing sleeve is fixedly connected to the side of the right end of the reducer housing, a reducer output shaft is installed inside the connecting bearing, the surface of the reducer output shaft is located on the right side of the connecting bearing and is fixedly connected to a first sealing block, the surface of the reducer output shaft is located on the right side of the first sealing block and is fixedly connected to a first sealing ring, the surface of the reducer output shaft is located on the left side of the connecting bearing and is fixedly connected to a second sealing ring, and the surface of the reducer output shaft is located on the left side of the second sealing ring and is fixedly connected to a second sealing block. The reducer output shaft sealing device effectively improves the sealing effect of the sealing device, ensures the practicality of the sealing device, and increases the service life of the sealing device, reducing the use cost of the sealing device;

[0004] Based on the above patent, the background technology thereof mentions that the existing reducer output shaft sealing device basically adopts oil seals or rubber sealing rings for sealing, and the overall sealing performance is poor, and the service life is short, which increases the cost of use. In this regard, in order to solve this technical problem, the present application proposes a reducer output shaft sealing device. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a reducer output shaft sealing device, aiming to improve the prior art. The existing reducer output shaft sealing device basically adopts oil seals or rubber sealing rings for sealing, and the overall sealing performance is poor, and the service life is short, which increases the cost of use.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A reducer output shaft sealing device comprises a reducer housing and a reducer output shaft, the front end of the reducer housing is fixedly connected with a mounting sleeve, the driving end of the reducer output shaft is located inside the mounting sleeve, the rear end of the mounting sleeve is connected with a sealing sleeve 1 through a closing component, the outer wall of the sealing sleeve 1 is threadedly connected to the rear end of the inner wall of the reducer output shaft, the inner wall of the reducer output shaft is connected with an inner ring through a fitting component, the inner ring is sleeved on the outer wall of the reducer output shaft, an expansion ring is arranged on the front side of the sealing sleeve 1, the outer periphery of the expansion ring abuts against the inner wall of the reducer output shaft, the front side of the expansion ring is connected with a sealing sleeve 2 through a bearing component, the sealing sleeve 2 is connected with a sealing sleeve through a clamping component, the rear end outer wall of the sealing sleeve is threadedly connected to the front end of the inner wall of the reducer output shaft, the inner wall of the sealing sleeve is rotatably connected with a rotating sleeve, and the rotating sleeve is sleeved on the outer wall of the reducer output shaft.

[0008] Furthermore, the sealing assembly includes two sealing rings located at the rear side of the installation sleeve, the rear side of the sealing ring is slidably connected with a chimeric ring, and the front end of the sealing ring is slidably connected to the rear side of the installation sleeve.

[0009] Furthermore, one end of the embedded ring is located inside one of the sealing rings, and the other end of the embedded ring is located inside the other sealing ring.

[0010] Furthermore, the chimeric component comprises a plurality of chimeric teeth provided on the outer wall of the inner ring and on an inner wall of the sealing sleeve, and the outer chimeric tooth sleeve is provided on the outer wall of the inner chimeric teeth.

[0011] Furthermore, the bearing assembly includes two gaskets located on the side close to the expansion ring and the sealing sleeve, and bearings are arranged on the side close to the two gaskets, and the bearing sleeve is arranged on the middle end of the outer wall of the output shaft of the reducer.

[0012] Furthermore, the clamping assembly comprises two clamping teeth arranged on the front side of the second sealing sleeve and the rear side of the sealing sleeve, and the clamping teeth on both sides abut against each other.

[0013] Furthermore, the front end of the sealing sleeve is conical in shape, and a plurality of grooves are formed on the outer wall of the front end of the sealing sleeve.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, through the mutual cooperation of the sealing sleeve 1, the sealing sleeve 2, the inner ring, the interlocking teeth and the sealing sleeve, the two ends of the mounting sleeve on which the output shaft of the reducer is mounted can be sealed to improve its sealing performance, increase the tightness of the connection between the sealing sleeve 1 and the inner ring, and cooperate with the connection of the two layers of interlocking teeth to further reduce the possibility of oil leakage, reduce the risk of leakage, and greatly improve the stability of the sealing structure.

[0016] 2. In the utility model, the gasket can disperse the pressure during the installation process to protect the bearing from damage and maintain the stability of the output shaft of the reducer. The sealing sleeve 2 bites the sealing sleeve through the clamping teeth, so that the rotating sleeve inside it rotates with the output shaft of the reducer to avoid driving the sealing sleeve to rotate and thus loosen, thereby improving the sealing ability and the stability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of a reducer output shaft sealing device proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of a mounting sleeve of a reducer output shaft sealing device proposed by the utility model;

[0019] Figure 3 This is a structural schematic diagram of a sealing ring of a reducer output shaft sealing device proposed by the utility model;

[0020] Figure 4 This is a structural schematic diagram of a chimeric ring of a reducer output shaft sealing device proposed by the utility model;

[0021] Figure 5 The utility model is a schematic structural diagram of the locking teeth of the output shaft sealing device of the reducer.

[0022] Legend:

[0023] 1. Reducer housing; 2. Reducer output shaft; 3. Mounting sleeve; 4. Sealing ring; 5. Fitting ring; 6. Sealing sleeve 1; 7. Inner ring; 8. Fitting teeth; 9. Expansion ring; 10. Bearing; 11. Gasket; 12. Sealing sleeve 2; 13. Sealing sleeve; 14. Gear; 15. Rotating sleeve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Reference Figure 1-5The utility model provides an embodiment: a reducer output shaft sealing device, including a reducer housing 1 and a reducer output shaft 2, the front end of the reducer housing 1 is fixedly connected with a mounting sleeve 3, the driving end of the reducer output shaft 2 is located inside the mounting sleeve 3, the outer wall of the sealing sleeve 6 is threadedly connected to the rear end of the inner wall of the reducer output shaft 2, the inner wall of the reducer output shaft 2 is connected with an inner ring 7, the inner ring 7 is sleeved on the outer wall of the reducer output shaft 2, the front side of the sealing sleeve 6 is provided with an expansion ring 9, the expansion ring 9 The outer periphery abuts against the inner wall of the output shaft 2 of the reducer, and two gaskets 11 are located on the side close to the expansion ring 9 and the sealing sleeve 12. A bearing 10 is arranged on the side close to the two gaskets 11. The bearing 10 is sleeved on the middle end of the outer wall of the output shaft 2 of the reducer. The front side of the sealing sleeve 12 is connected to a sealing sleeve 13. The outer wall of the rear end of the sealing sleeve 13 is threadedly connected to the front end of the inner wall of the output shaft 2 of the reducer. The inner wall of the sealing sleeve 13 is rotatably connected to a rotating sleeve 15, and the rotating sleeve 15 is sleeved on the outer wall of the output shaft 2 of the reducer;

[0026] Specifically, the expansion ring 9 has a certain degree of ductility. When the front and rear ends are subjected to force, the expansion ring 9 will bulge outward and deform, thereby pressing against the inner wall of the mounting sleeve 3 to improve the sealing performance. The gaskets 11 on both sides of the bearing 10 help to isolate the bearing 10 and play a role in dispersing the pressure during the installation process to protect the bearing 10 from being easily damaged during the installation process.

[0027] Two sealing rings 4 are installed at the rear side of the installation sleeve 3, and a fitting ring 5 is slidably connected to the rear side of the sealing ring 4. The front end of the sealing ring 4 is slidably connected to the rear side of the installation sleeve 3, and one end of the fitting ring 5 is located inside one of the sealing rings 4, and the other end of the fitting ring 5 is located inside the other sealing ring 4;

[0028] Specifically, the sealing ring 4 is normally in a loose state offset to both ends. When the reducer output shaft 2 is installed and inserted into the mounting sleeve 3, the loose sealing ring 4 is closed and the interlocking ring 5 is slid so that the two interlocking rings 5 ​​are spliced ​​and fixed, and the inner wall is tightly attached to the outer wall of the reducer output shaft 2, and rotates on the mounting sleeve 3 along with the rotation of the reducer output shaft 2.

[0029] A plurality of engaging teeth 8 are provided on the outer wall of the inner ring 7 and the inner wall of the sealing sleeve 6, and the outer peripheral engaging teeth 8 are sleeved on the outer wall of the inner peripheral engaging teeth 8;

[0030] Specifically, the mutual engagement of the interlocking teeth 8 can increase the tightness of the connection between the sealing sleeve 6 and the inner ring 7. The connection of the two layers of interlocking teeth 8 further reduces the possibility of oil leakage, reduces the risk of leakage, and greatly improves the stability of the sealing structure.

[0031] The two latching teeth 14 arranged at the front side of the second sealing sleeve 12 and the rear side of the sealing sleeve 13 are both in the shape of concave-convex teeth, and the latching teeth 14 on both sides are in contact with each other by the concave-convex teeth;

[0032] Specifically, the sealing sleeve 12 serves as the front end sealing structure of the sealing structure, and cooperates with the tightened sealing sleeve 13 to seal the front end area. The sealing sleeve 13 is bitten by the locking teeth 14, so that the rotating sleeve 15 inside it rotates with the reducer output shaft 2 to avoid driving the sealing sleeve 13 to rotate, and prevent the threaded sealing sleeve 13 from loosening, so as to improve the sealing ability.

[0033] The front end of the sealing sleeve 13 is conical, and a plurality of grooves are provided on the front end outer wall of the sealing sleeve 13. The grooves on the sealing sleeve 13 can increase the friction force on the surface of the sealing sleeve 13, so that the sealing sleeve 13 can be tightened and fixed more conveniently;

[0034] Working principle: When installing the sealing structure, insert the sealing sleeve 1 6 with the inner ring 7 in front into the inner rear end of the mounting sleeve 3 from the front opening of the mounting sleeve 3 and tighten it. Place the expansion ring 9 that has not yet expanded and deformed in front of the sealing sleeve 1 6, and place the bearing 10 with gaskets 11 on both sides in front of the expansion ring 9. Then place the sealing sleeve 2 12 in front of the front gasket 11. Then pass the reducer output shaft 2 from the rear end of the mounting sleeve 3, between the two sealing rings 4, and pass through the inner ring 7, the expansion ring 9, the bearing 10 and the sealing sleeve 2 12. Then close the loose sealing ring 4 and slide the embedded ring 5 to splice and fix the two embedded rings 5, and make the inner wall close to the outer wall of the reducer output shaft 2. Finally, put the sealing sleeve 13 on the reducer output shaft 2 in the mounting sleeve 3 and tighten it on the inner wall of the mounting sleeve 3. The sealing sleeve 2 12 is bitten by the locking teeth 14, and the components including the expansion ring 9 on the rear side of the sealing sleeve 2 are squeezed backwards, so that the rear side of the expansion ring 9 is against the front side of the sealing sleeve 1 6, and is subjected to the pressure from the front side, so that it expands and deforms, thereby completing the sealing installation.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reducer output shaft sealing device, comprising a reducer housing (1) and a reducer output shaft (2), characterized in that: The front end of the reducer housing (1) is fixedly connected to a mounting sleeve (3), the driving end of the reducer output shaft (2) is located inside the mounting sleeve (3), the rear end of the mounting sleeve (3) is connected to a sealing sleeve (6) via a sealing component, the outer wall of the sealing sleeve (6) is threadedly connected to the rear end of the inner wall of the reducer output shaft (2), the inner wall of the reducer output shaft (2) is connected to an inner ring (7) via a fitting component, the inner ring (7) is sleeved on the outer wall of the reducer output shaft (2), and the front side of the sealing sleeve (6) is provided with a sealing sleeve (6) having a sealing surface. An expansion ring (9) is arranged, the outer periphery of the expansion ring (9) abuts against the inner wall of the output shaft (2) of the reducer, the front side of the expansion ring (9) is connected to a sealing sleeve (12) via a bearing assembly, the sealing sleeve (12) is connected to a sealing sleeve (13) via a clamping assembly, the outer wall of the rear end of the sealing sleeve (13) is threadedly connected to the front end of the inner wall of the output shaft (2) of the reducer, the inner wall of the sealing sleeve (13) is rotatably connected to a rotating sleeve (15), and the rotating sleeve (15) is sleeved on the outer wall of the output shaft (2) of the reducer.

2. A reducer output shaft sealing device according to claim 1, characterized in that: The sealing assembly comprises two sealing rings (4) located at the rear side of the installation sleeve (3), the rear side of the sealing ring (4) is slidably connected to a chimeric ring (5), and the front end of the sealing ring (4) is slidably connected to the rear side of the installation sleeve (3).

3. A reducer output shaft sealing device according to claim 2, characterized in that: One end of the embedded ring (5) is located inside one of the sealing rings (4), and the other end of the embedded ring (5) is located inside the other sealing ring (4).

4. The reducer output shaft sealing device according to claim 1, characterized in that: The interlocking assembly comprises a plurality of interlocking teeth (8) provided on the outer wall of the inner ring (7) and the inner wall of the sealing sleeve (6), wherein the outer interlocking teeth (8) are sleeved on the outer wall of the inner interlocking teeth (8).

5. The reducer output shaft sealing device according to claim 1, characterized in that: The bearing assembly comprises two gaskets (11) located on the side close to the expansion ring (9) and the second sealing sleeve (12), and a bearing (10) is arranged on the side close to the two gaskets (11), and the bearing (10) is sleeved on the middle end of the outer wall of the reducer output shaft (2).

6. The reducer output shaft sealing device according to claim 1, characterized in that: The clamping assembly comprises two clamping teeth (14) arranged on the front side of the second sealing sleeve (12) and the rear side of the sealing sleeve (13), and the clamping teeth (14) on both sides abut against each other.

7. The reducer output shaft sealing device according to claim 1, characterized in that: The front end of the sealing sleeve (13) is conical in shape, and a plurality of grooves are formed on the outer wall of the front end of the sealing sleeve (13).

Images