Shaft sealing structure of speed reducer
By setting up a double seal ring structure on the reducer shaft, the problem of easy wear or falling off of the seal ring is solved, and the stability of the seal ring and the continuous operation of the equipment are achieved.
Patent Information
- Application Number
- CN202422710088.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-11-06
AI Technical Summary
The sealing ring of existing reducers is prone to wear or fall off, resulting in seal failure and affecting the stable operation of the equipment.
The double seal structure is adopted, which includes two sets of bearings and bearing sealing gaskets on the output shaft, and a sleeve sealing ring is set between the outer wall of the limiting sleeve and the body, forming the limiting effect of the double sealing ring to ensure that the other group can still maintain the sealing effect when one set of sealing rings fails.
It improves the connection stability and seal reliability of the reducer shaft, avoids equipment damage caused by the failure of a single sealing ring, and ensures continuous operation of the equipment.
Smart Images
Figure CN223178126U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of speed reducers, in particular to a shaft sealing structure of a speed reducer. Background Art
[0002] A speed reducer is an independent component composed of gear transmission and worm - worm gear transmission enclosed in a rigid housing, and is commonly used as a speed reduction transmission device between a prime mover and a working machine. It plays a role in matching speeds and transmitting torques between the prime mover and the working machine or the actuator, and is widely used in modern machinery. Existing speed reducers usually use sealing rings for sealing. After normal use for a period of time, it is easy to cause wear or the spring loses its elasticity, ultimately resulting in seal failure; or when there is a certain pressure inside the equipment, the sealing ring is more likely to be pressed off, leading to leakage of the material inside the connected equipment. Regarding the situation where the sealing ring is prone to falling off, how to ensure the use stability of the sealing ring. For the traditional way of using the sealing ring, if a double - sealing structure is adopted, when one set of sealing rings has problems, the other set of sealing rings can still play a sealing role, thus avoiding the problem that the traditional single sealing ring cannot be used continuously after falling off. Therefore, a shaft sealing structure for a speed reducer is needed. Summary of the Utility Model
[0003] In view of the above - mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a shaft sealing structure for a speed reducer, which is used to solve the problem of seal failure caused by easy wear of the sealing ring in the prior art.
[0004] To achieve the above - mentioned purpose and other related purposes, the present utility model provides the following technical solutions:
[0005] A shaft sealing structure for a speed reducer, comprising:
[0006] A body, with a main shaft connected to one end of the body, and the main shaft extends out of the body;
[0007] An output cavity, which is arranged inside the body at the end far from the main shaft, and the output cavity is coaxial with the main shaft. An output shaft is arranged in the output cavity. Two sets of bearings are arranged on the output shaft, and the two sets of bearings are arranged at intervals. A bearing gasket is arranged between the front side of the bearing at the end far from the main shaft and the output shaft. A limiting shaft sleeve is arranged between the outer side of the output shaft and the output cavity, and a shaft sleeve sealing ring is arranged between the outer wall of the limiting shaft sleeve and the body.
[0008] To implement the above technical solution, by setting two sets of bearings on the output shaft, the connection stability between the output shaft and the machine body can be improved. Moreover, by setting a bearing gasket between the front side of the bearing far from the main shaft and the output shaft, the sealing stability at the bearing end can be ensured. The setting of the limit bushing can ensure the stable use of the bearing, and by setting a bushing seal ring between the outer wall of the limit bushing and the machine body, the sealing reliability of the limit bushing can be ensured.
[0009] In an embodiment of the present utility model, the two sets of bearings include a first bearing arranged closer to the main shaft side and a second bearing arranged far from the main shaft. The radial dimension of the first bearing is larger than that of the second bearing. A bearing limit ring is arranged in the interval space between the first bearing and the second bearing. The radial dimension of the bearing limit ring is larger than that of the second bearing and smaller than that of the first bearing.
[0010] To implement the above technical solution, by making the radial dimension of the first bearing larger than that of the second bearing, the support stability of the first bearing and the second bearing for the main shaft can be improved. And the setting of the bearing limit ring can play a limiting role on the first bearing and the second bearing, ensuring the positioning accuracy during the assembly of the first bearing and the second bearing.
[0011] In an embodiment of the present utility model, a cycloid cavity is further arranged in the machine body, and an eccentric body is arranged in the cycloid cavity.
[0012] To implement the above technical solution, the setting of the cycloid cavity can provide an assembly space for the eccentric body, ensuring the stable operation of the speed reducer.
[0013] In an embodiment of the present utility model, an oil seal cavity is arranged between the front end of the output cavity and the inner wall of the limit bushing. An oil seal gasket is arranged in the oil seal cavity, and the oil seal gasket is located at the end far from the main shaft in the oil seal cavity.
[0014] To implement the above technical solution, by arranging an oil seal cavity between the front end of the output cavity and the inner wall of the limit bushing, an assembly space can be provided for the installation of the oil seal gasket. And by locating the oil seal gasket at the end far from the main shaft in the oil seal cavity, a more sufficient lubrication space can be provided for the oil, improving the lubrication effect of the oil.
[0015] In an embodiment of the present utility model, a set of front bushing seal rings is further arranged between the front side of the limit bushing and the machine body.
[0016] To implement the above technical solution, by arranging a set of front bushing seal rings on the front side of the limit bushing, the limiting effect of a double seal ring can be formed. Thus, when one of the bushing seal rings fails in sealing, the other seal ring can maintain the sealing effect, ensuring the continuous operation of the equipment and avoiding the situation of equipment damage caused by the failure of a single seal ring.
[0017] In an embodiment of the present utility model, an output oil seal cavity is provided between the output shaft and the machine body. Two groups of oil cavity sealing rings are provided at both ends of the output oil seal cavity, and an oil seal is provided between the two groups of oil cavity sealing rings.
[0018] To achieve the above technical solution, by providing two groups of oil cavity sealing rings at both ends of the output oil seal cavity, the use stability of the output oil seal cavity can be ensured, and the situation of oil leakage in the output oil seal cavity during use can be reduced. The oil seal provided between the two groups of oil cavity sealing rings can cooperate with the two groups of oil cavity sealing rings to further improve the sealing reliability, so as to ensure the operation stability of the equipment.
[0019] As described above, a shaft sealing structure of a speed reducer of the present utility model has the following beneficial effects: by providing two groups of bearings on the output shaft, the connection stability between the output shaft and the machine body can be improved. Moreover, by providing a bearing sealing gasket between the front side of the bearing far from the main shaft end and the output shaft, the sealing stability of the bearing end can be ensured. The setting of the limiting shaft sleeve can ensure the use stability of the bearing, and by providing a shaft sleeve sealing ring between the outer wall of the limiting shaft sleeve and the machine body, the sealing reliability of the limiting shaft sleeve can be ensured.
[0020] By providing a group of front shaft sleeve sealing rings on the front side of the limiting shaft sleeve, a limiting effect of double sealing rings can be formed. Thus, when one of the shaft sleeve sealing rings fails in sealing, the other sealing ring can maintain the sealing effect, so as to ensure the continuous operation of the equipment and avoid the situation of equipment damage caused by the failure of a single sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It shows a schematic structural diagram of the shaft sealing structure of the speed reducer disclosed in the embodiment of the present utility model.
[0022] Figure 2 It shows a schematic cross-sectional structural diagram of the shaft sealing structure of the speed reducer disclosed in the embodiment of the present utility model.
[0023] DESCRIPTION OF REFERENCE NUMERALS
[0024] 1. Machine body; 2. Main shaft; 3. Output cavity; 4. Output shaft; 5. Bearing sealing gasket; 6. Limiting shaft sleeve; 7. Shaft sleeve sealing ring; 8. First bearing; 9. Second bearing; 10. Cycloid cavity; 11. Oil seal cavity; 12. Oil seal gasket; 13. Front shaft sleeve sealing ring; 14. Output oil seal cavity; 15. Oil cavity sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.
[0026] Please refer to Figures 1 to 2 Figures 1 to 2 , the present utility model provides a shaft sealing structure for a speed reducer, which includes a main shaft 2 connected to one end of a machine body 1, the main shaft 2 extends out of the machine body 1, an output cavity 3 is arranged in the machine body 1 at a position far from the main shaft 2, and the output cavity 3 is coaxial with the main shaft 2. An output shaft 4 is arranged in the output cavity 3, two sets of bearings are arranged on the output shaft 4, and the two sets of bearings are arranged at intervals. A bearing gasket 5 is arranged between the front side of the bearing far from the main shaft 2 and the output shaft 4. A limiting bushing 6 is arranged between the outer side of the output shaft 4 and the output cavity 3, and a bushing seal ring 7 is arranged between the outer wall of the limiting bushing 6 and the machine body 1.
[0027] By arranging two sets of bearings on the output shaft 4, the connection stability between the output shaft 4 and the machine body 1 can be improved. Moreover, by arranging a bearing gasket 5 between the front side of the bearing far from the main shaft 2 and the output shaft 4, the sealing stability of the bearing end can be ensured. The arrangement of the limiting bushing 6 can ensure the use stability of the bearing, and by arranging a bushing seal ring 7 between the outer wall of the limiting bushing 6 and the machine body 1, the sealing reliability of the limiting bushing 6 can be ensured.
[0028] The two sets of bearings include a first bearing 8 arranged on the side close to the main shaft 2 and a second bearing 9 arranged far from the main shaft 2. The radial dimension of the first bearing 8 is larger than that of the second bearing 9. A bearing limiting ring is arranged in the spaced space between the first bearing 8 and the second bearing 9. The radial dimension of the bearing limiting ring is larger than that of the second bearing 9 and smaller than that of the first bearing 8.
[0029] By making the radial dimension of the first bearing 8 larger than that of the second bearing 9, the support stability of the first bearing 8 and the second bearing 9 for the main shaft 2 can be improved. And the arrangement of the bearing limiting ring can play a role in limiting the first bearing 8 and the second bearing 9, ensuring the positioning accuracy of the first bearing 8 and the second bearing 9 during assembly.
[0030] A cycloid cavity 10 is also arranged in the machine body 1, and an eccentric body is arranged in the cycloid cavity 10. The arrangement of the cycloid cavity 10 can provide an assembly space for the eccentric body, ensuring the operation stability of the speed reducer.
[0031] An oil seal cavity 11 is arranged between the front end of the output cavity 3 and the inner wall of the limiting bushing 6, and an oil seal gasket 12 is arranged in the oil seal cavity 11. Moreover, the oil seal gasket 12 is located at the end far from the main shaft 2 in the oil seal cavity 11. By arranging the oil seal cavity 11 between the front end of the output cavity 3 and the inner wall of the limiting bushing 6, an assembly space can be provided for the installation of the oil seal gasket 12. And by locating the oil seal gasket 12 at the end far from the main shaft 2 in the oil seal cavity 11, a more sufficient lubrication space can be provided for the oil, improving the lubrication effect of the oil.
[0032] A set of front bushing sealing rings 13 is also provided between the front side of the limit bushing 6 and the machine body 1. By arranging a set of front bushing sealing rings 13 on the front side of the limit bushing 6, the limiting effect of a double sealing ring can be formed. Thus, when one of the bushing sealing rings 7 fails in sealing, the other sealing ring can maintain the sealing effect, ensuring the continuous operation of the equipment and avoiding the situation of equipment damage caused by the failure of a single sealing ring.
[0033] An output oil seal cavity 14 is provided between the output shaft 4 and the machine body 1. Two sets of oil cavity sealing rings 15 are arranged at both ends of the output oil seal cavity 14, and an oil seal is arranged between the two sets of oil cavity sealing rings. By arranging two sets of oil cavity sealing rings 15 at both ends of the output oil seal cavity 14, the use stability of the output oil seal cavity 14 can be ensured, and the situation of oil leakage in the output oil seal cavity 14 during use can be reduced. The oil seal arranged between the two sets of oil cavity sealing rings 15 can cooperate with the two sets of oil cavity sealing rings to further improve the sealing reliability, so as to ensure the operation stability of the equipment.
[0034] The utility model can improve the connection stability between the output shaft and the machine body by arranging two sets of bearings on the output shaft. Moreover, a bearing gasket is arranged between the front side of the bearing at the end far from the main shaft and the output shaft, which can ensure the sealing stability at the bearing end. The setting of the limit bushing can ensure the use stability of the bearing, and an axle sleeve sealing ring is arranged between the outer wall of the limit bushing and the machine body, which can ensure the sealing reliability of the limit bushing. By arranging a set of front bushing sealing rings on the front side of the limit bushing, the limiting effect of a double sealing ring can be formed. Thus, when one of the bushing sealing rings fails in sealing, the other sealing ring can maintain the sealing effect, ensuring the continuous operation of the equipment and avoiding the situation of equipment damage caused by the failure of a single sealing ring.
[0035] The above embodiments are only illustrative of the principles and effects of the utility model, and are not used to limit the utility model. All equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the utility model should still be covered by the claims of the utility model.
Claims
1. A sealing structure for a speed reducer shaft, characterized in that, Comprising: A machine body, at one end of which a main shaft is connected, and the main shaft extends out of the machine body; An output cavity, which is arranged in the machine body at the end far from the main shaft, and the output cavity is coaxial with the main shaft. An output shaft is arranged in the output cavity, and two sets of bearings are arranged on the output shaft. The two sets of bearings are arranged at intervals. A bearing gasket is arranged between the front side of the bearing far from the main shaft and the output shaft. A limit sleeve is arranged between the outer side of the output shaft and the output cavity, and a sleeve sealing ring is arranged between the outer wall of the limit sleeve and the machine body.
2. The shaft seal structure of the speed reducer according to claim 1, wherein: The two sets of bearings include a first bearing arranged on the side close to the main shaft and a second bearing arranged far from the main shaft. The radial dimension of the first bearing is larger than that of the second bearing. A bearing limit ring is arranged in the space between the first bearing and the second bearing. The radial dimension of the bearing limit ring is larger than that of the second bearing and smaller than that of the first bearing.
3. The speed reducer shaft seal structure according to claim 1, characterized in that: A cycloid cavity is also arranged in the machine body, and an eccentric body is arranged in the cycloid cavity.
4. The shaft seal structure of the speed reducer according to claim 1, characterized in that: An oil seal cavity is arranged between the front end of the output cavity and the inner wall of the limit sleeve, and an oil seal gasket is arranged in the oil seal cavity. And the oil seal gasket is located at the end far from the main shaft in the oil seal cavity.
5. The speed reducer shaft sealing structure according to claim 1, characterized in that: A set of front sleeve sealing rings is also arranged between the front side of the limit sleeve and the machine body.
6. The shaft seal structure of the speed reducer according to claim 1, characterized in that: An output oil seal cavity is arranged between the output shaft and the machine body. Two sets of oil cavity sealing rings are arranged at both ends of the output oil seal cavity, and an oil seal is arranged between the two sets of oil cavity sealing rings.