Cycloidal gear speed reducer

Abstract

The invention relates to the technical field of speed reducers, in particular to a cycloid gear speed reducer which comprises an output flange, an input flange and an annular gear shell, an annular gear pin is arranged on the inner side of the annular gear shell, a curve middle piece is further arranged on one side of the annular gear pin, and a cycloid cavity is formed in the annular gear shell and located on the inner side of the annular gear pin. The two ends of the annular gear shell are connected with the output flange and the input flange through bolts respectively, the sealing reliability after connection can be guaranteed, the cycloid pin shaft with the two ends connected to the output flange and the input flange respectively is arranged in the cycloid cavity, the cycloid shaft sleeve can be conveniently installed, and the service life of the cycloid shaft sleeve is prolonged. And meanwhile, the working stability of the eccentric body in the cycloid cavity is improved, the cycloid pin shaft is matched with the connector, the connecting stability and the positioning accuracy between the annular gear shell and the output flange and the input flange can be improved, and therefore the sealing performance between the annular gear shell and the output flange and between the annular gear shell and the input flange is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of reducers, and in particular to a cycloid gear reducer. Background Art

[0002] As an important part of the robot reducer, the cycloid gear bears the output torque of the reducer. While keeping the outer dimensions of the reducer unchanged, it is often necessary to increase the eccentricity to increase the lever arm to ultimately increase the allowable output torque. However, increasing the eccentricity will cause the cycloid wheel tooth top to interfere with the pin gear ring tooth top. The cycloid wheel tooth top has a large relative speed and generates a lot of heat. The cycloid wheel bears most of the torque near the inflection point, while the tooth top and tooth root bear less torque. At the same time, during the meshing process, it is necessary to leave a certain gap to form a lubricating oil film and dissipate heat. While the gap provides space for the oil, it also needs to ensure the reliability of the seal to avoid leakage during actual use. Only in this way can the normal use of the reducer be guaranteed. Therefore, a cycloid gear reducer is needed. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a cycloid gear reducer to solve the problem of oil sealing of the cycloid reducer in the prior art.

[0004] To achieve the above objectives and other related objectives, the present invention provides the following technical solutions:

[0005] A cycloid gear reducer, comprising:

[0006] An output flange and an input flange, and an annular gear housing connected between the output flange and the input flange;

[0007] The two ends of the annular gear housing are respectively connected to the output flange and the input flange by bolts, an annular gear pin is arranged inside the annular gear housing, and a curved middle plate is also arranged on one side of the annular gear pin;

[0008] A cycloid cavity is provided in the annular gear housing and inside the annular gear pin. A cycloid pin shaft is provided in the cycloid cavity, and its two ends are respectively connected to the output flange and the input flange. A cycloid shaft sleeve is sleeved on the cycloid pin shaft. An eccentric body is provided at the center of the cycloid cavity, and a hollow input shaft is provided at the center of the eccentric body.

[0009] To implement the above technical solution, by connecting the two ends of the annular gear housing to the output flange and the input flange respectively through bolts, the convenience of disassembly between the annular gear housing and the output flange and the input flange can be improved, and the sealing reliability after connection can be ensured; a cycloid pin shaft with two ends respectively connected to the output flange and the input flange is provided in the cycloid cavity, which can facilitate the installation of the cycloid shaft sleeve and improve the working stability of the eccentric body in the cycloid cavity; the cycloid pin shaft cooperates with the connector, which can improve the connection stability between the annular gear housing and the output flange and the input flange, as well as the positioning accuracy, thereby ensuring the sealing between the annular gear housing and the output flange and the input flange.

[0010] In one embodiment of the present invention, an output shaft seat and a support shaft seat are further provided between the two ends of the cycloid cavity and the output flange and the input flange, the cycloid sleeve is supported between the output shaft seat and the support shaft seat, the two ends of the cycloid pin shaft extend into the output shaft seat and the support shaft seat respectively, the output flange and the input flange are respectively provided with a first shaft seat limiting groove and a second shaft seat limiting groove, the output shaft seat is located in the first shaft seat limiting groove, and the support shaft seat is located in the second shaft seat limiting groove.

[0011] To implement the above technical solution, by setting the output shaft seat and the support shaft seat, a limiting treatment can be provided for the installation of the cycloid sleeve, thereby ensuring the stability of the cycloid sleeve in use. The two ends of the cycloid pin shaft respectively extend into the output shaft seat and the support shaft seat, which can further enhance the stability of the cycloid pin shaft in use. By setting the first shaft seat limiting groove and the second shaft seat limiting groove, a limiting effect can be played on the displacement of the output shaft seat and the support shaft seat in the axial direction of the annular gear housing, respectively, thereby ensuring the support reliability of the output shaft seat and the support shaft seat during operation.

[0012] In one embodiment of the present invention, a shaft seat limiting bearing is arranged between the support shaft seat and the second shaft seat limiting groove, the hollow input shaft passes through the support shaft seat, and a hollow bearing is sleeved on the hollow input shaft, a hollow groove is arranged on the support shaft seat, the hollow bearing is located in the hollow groove, a hollow shaft seat is arranged on the hollow bearing, and the radial width of the hollow bearing covers the hollow shaft seat and the input flange respectively.

[0013] To implement the above technical solution, by setting a shaft seat limit bearing, it can cooperate with the support shaft seat to play a limiting support role for the hollow input shaft, and at the same time it can also improve the use stability of the support shaft seat. The hollow bearing is located in the hollow groove, and the hollow groove can be used to limit the assembly of the hollow bearing, and at the same time improve the support stability of the hollow bearing during use. The hollow shaft seat can be used to limit the assembly of the hollow bearing on the hollow input shaft, thereby ensuring the convenience of installation of the hollow shaft seat.

[0014] In one embodiment of the present invention, an output shaft connected to an external output end is arranged on the output shaft seat, an output bearing cavity is arranged in the output shaft seat, an output bearing sleeved on a hollow input shaft is arranged in the output bearing cavity, a shaft limit seat is arranged in the output bearing cavity between the output shaft seat and the output shaft, the output bearing is located on one side of the shaft limit seat, and the hollow input shaft is embedded in the shaft limit seat.

[0015] To implement the above technical solution, by setting up an output bearing cavity, it is possible to provide an assembly space for the output bearing, thereby improving the use stability of the output shaft, and by setting a shaft limit seat in the output bearing cavity between the output shaft seat and the output shaft, the shaft limit seat can provide limiting support for the assembly of the hollow input shaft, thereby improving the use stability of the hollow input shaft.

[0016] In one embodiment of the present invention, a sealed bearing is arranged on the output shaft, a sealed shaft seat is arranged on the output shaft close to the side of the hollow input shaft, a sealed shaft cavity is arranged between the sealed shaft seat and the output flange, two groups of sealed bearings are symmetrically arranged in the sealed shaft cavity, and the two groups of sealed bearings are arranged at intervals, and a distance ring is arranged in the interval space between the two groups of sealed bearings, and the two ends of the distance ring are respectively pressed against the two groups of sealed bearings.

[0017] To implement the above technical solution, a sealing shaft seat is provided to provide a limiting effect on the installation of the sealed bearing, and the provision of the sealed bearing can improve the use stability of the output shaft, the sealed shaft cavity can provide an assembly space for the sealed bearing, and can provide a flow space for the oil, and the spacing between the two groups of sealed bearings can improve the fluidity of the oil and provide sufficient flow space for the flow of the oil, and the provision of the spacing ring can provide limiting support for the two groups of sealed bearings to ensure the support stability and use reliability of the two groups of sealed bearings.

[0018] In one embodiment of the present invention, a leak-proof oil seal is arranged between the front end of the output flange and the output shaft, a leak-proof groove is arranged at the front end of the output flange, the leak-proof oil seal is arranged in the leak-proof groove, and the leak-proof groove is spaced apart from the output bearing cavity, and an oil seal limit platform is arranged in the spaced apart space.

[0019] To implement the above technical solution, by providing a leak-proof oil seal, leakage of oil in the sealed shaft cavity can be avoided. By providing a leak-proof groove, assembly space can be provided for the leak-proof oil seal, thereby improving the service stability of the leak-proof oil seal. The interval between the leak-proof groove and the output bearing cavity can provide sufficient flow space for the oil, thereby preventing the leak-proof oil seal from limiting the flow of the oil. The setting of the oil seal limit platform can provide assembly space for the installation of the leak-proof oil seal, thereby improving the assembly stability of the leak-proof oil seal.

[0020] In one embodiment of the present invention, an external flange is provided at one end of the output flange away from the annular gear housing, the external flange is connected to the annular gear housing via bolts, and an external bolt hole is provided at one end of the external flange away from the output flange.

[0021] To implement the above technical solution, by setting an external flange, it is possible to facilitate external equipment on the output flange, and the external flange and the annular gear housing are connected by bolts, which can improve the convenience of disassembly and the sealing reliability after assembly. The setting of the external bolt hole can facilitate the assembly of the external equipment.

[0022] In one embodiment of the present invention, a flange stop seat is provided on one side of the output flange connected to the external flange, the inner diameter of the external flange matches the radial dimension of the outer diameter of the flange stop seat, and the external flange is buckled on the flange stop seat.

[0023] To implement the above technical solution, a flange limit seat is provided on one side of the output flange connected to the external flange, the flange limit seat is used to improve the assembly stability of the external flange, and the external flange is buckled onto the flange limit seat. The flange limit seat can be used to guide the assembly of the external flange, thereby improving the convenience of assembly.

[0024] In one embodiment of the present invention, a lubrication cavity is provided in the flange limit seat, the hollow input shaft passes through the lubrication cavity, and an input oil seal is sleeved on the hollow input shaft, the input oil seal is away from one side end face of the annular gear housing and is flush with the root end face of the flange limit seat, and a rear end of the input oil seal is spaced from the lubrication cavity.

[0025] To implement the above technical solution, the setting of the lubrication cavity can provide lubrication space for the hollow input shaft in the flange limit seat, thereby improving the use stability of the hollow input shaft, and the input oil seal is moved away from the end face of one side of the annular gear housing to be flush with the root end face of the flange limit seat, thereby avoiding the input oil seal from affecting the installation of the external flange, and the interval between the rear end of the input oil seal and the lubrication cavity can provide sufficient flow space for the oil to ensure the reliability of the oil.

[0026] As described above, a cycloid gear reducer of the present invention has the following beneficial effects: by respectively connecting the two ends of the annular gear housing with the output flange and the input flange through bolts, the convenience of disassembly between the annular gear housing and the output flange and the input flange can be improved, and the sealing reliability after connection can be ensured; a cycloid pin shaft with two ends respectively connected to the output flange and the input flange is provided in the cycloid cavity, which can facilitate the installation of the cycloid shaft sleeve and improve the working stability of the eccentric body in the cycloid cavity; the cycloid pin shaft cooperates with the connector, which can improve the connection stability between the annular gear housing and the output flange and the input flange, as well as the positioning accuracy, thereby ensuring the sealing between the annular gear housing and the output flange and the input flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Shown is a schematic structural diagram of a cycloid gear reducer disclosed in an embodiment of the present invention.

[0028] Figure 2 Display as Figure 1 A partial enlarged view of the figure marked A.

[0029] Figure 3 Shown is a schematic diagram of the input oil seal structure of the cycloid gear reducer disclosed in an embodiment of the present invention.

[0030] Component number description

[0031] 1. Output flange; 2. Input flange; 3. Annular gear housing; 4. Annular gear pin; 5. Curved middle piece; 6. Cycloidal cavity; 7. Cycloidal pin shaft; 8. Cycloidal bushing; 9. Eccentric body; 10. Hollow input shaft; 11. Output shaft seat; 12. Support shaft seat; 13. First shaft seat limiting groove; 14. Second shaft seat limiting groove; 15. Hollow bearing; 16. Hollow groove; 17. Hollow shaft seat; 18. Output shaft; 19. Output bearing cavity; 20. Output bearing; 21. Shaft limiting seat; 22. Sealed shaft seat; 23. Sealed bearing; 24. Distance ring; 25. Leak-proof oil seal; 26. Leak-proof groove; 27. Oil seal limiting platform; 28. External flange; 29. ​​Flange limiting seat; 30. Lubrication cavity; 31. Input oil seal; 32. Shaft seat limiting bearing. DETAILED DESCRIPTION

[0032] The following specific embodiments illustrate the implementation of the present invention, and those familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0033] See also Figures 1 to 3 The present invention provides a cycloid gear reducer, comprising an output flange 1 and an input flange 2, and an annular gear housing 3 connected between the output flange 1 and the input flange 2, wherein the two ends of the annular gear housing 3 are respectively connected to the output flange 1 and the input flange 2 by bolts, an annular gear pin 4 is arranged on the inner side of the annular gear housing 3, and a curved middle plate 5 is also arranged on one side of the annular gear pin 4, a cycloid cavity 6 is arranged inside the annular gear housing 3 and inside the annular gear pin 4, a cycloid pin shaft 7 whose two ends are respectively connected to the output flange 1 and the input flange 2 is arranged in the cycloid cavity 6, a cycloid shaft sleeve 8 is sleeved on the cycloid pin shaft 7, an eccentric body 9 is arranged at the center of the cycloid cavity 6, and a hollow input shaft 10 is arranged at the center of the eccentric body 9.

[0034] By connecting the two ends of the annular gear housing 3 to the output flange 1 and the input flange 2 respectively through bolts, the convenience of disassembly between the annular gear housing 3 and the output flange 1 and the input flange 2 can be improved, and the sealing reliability after connection can be guaranteed. A cycloid pin shaft 7 with two ends respectively connected to the output flange 1 and the input flange 2 is provided in the cycloid chamber 6, which can facilitate the installation of the cycloid shaft sleeve 8 and improve the working stability of the eccentric body 9 in the cycloid chamber 6. The cycloid pin shaft 7 cooperates with the connector to improve the connection stability and positioning accuracy between the annular gear housing 3 and the output flange 1 and the input flange 2, thereby ensuring the sealing between the annular gear housing 3 and the output flange 1 and the input flange 2.

[0035] An output shaft 18 seat 11 and a support shaft seat 12 are also provided between the two ends of the cycloid cavity 6 and the output flange 1 and the input flange 2. The cycloid sleeve 8 is supported between the output shaft 18 seat 11 and the support shaft seat 12. The two ends of the cycloid pin shaft 7 extend to the output shaft 18 seat 11 and the support shaft seat 12 respectively. The output flange 1 and the input flange 2 are respectively provided with a first shaft seat limiting groove 13 and a second shaft seat limiting groove 14. The output shaft 18 seat 11 is located in the first shaft seat limiting groove 13, and the support shaft seat 12 is located in the second shaft seat limiting groove 14.

[0036] By setting the output shaft 18 seat 11 and the support shaft seat 12, a limiting treatment can be provided for the installation of the cycloid sleeve 8, thereby ensuring the stability of the cycloid sleeve 8. The two ends of the cycloid pin shaft 7 extend into the output shaft 18 seat 11 and the support shaft seat 12 respectively, which can further enhance the stability of the cycloid pin shaft 7. By setting the first shaft seat limiting groove 13 and the second shaft seat limiting groove 14, the displacement of the output shaft 18 seat 11 and the support shaft seat 12 in the axial direction of the annular gear housing 3 can be limited respectively, thereby ensuring the support reliability of the output shaft 18 seat 11 and the support shaft seat 12 during operation.

[0037] A shaft seat limiting bearing 32 is arranged between the supporting shaft seat 12 and the second shaft seat limiting groove 14, the hollow input shaft 10 passes through the supporting shaft seat 12, and a hollow bearing 15 is sleeved on the hollow input shaft 10, a hollow groove 16 is arranged on the supporting shaft seat 12, the hollow bearing 15 is located in the hollow groove 16, a hollow shaft seat 17 is arranged on the hollow bearing 15, and the radial width of the hollow bearing 15 covers the hollow shaft seat 17 and the input flange 2 respectively.

[0038] By setting the shaft seat limiting bearing 32, it can cooperate with the support shaft seat 12 to play a limiting support role for the hollow input shaft 10, and at the same time, it can also improve the use stability of the support shaft seat 12. The hollow bearing 15 is located in the hollow groove 16, and the hollow groove 16 can be used to limit the assembly of the hollow bearing 15, and at the same time, the support stability of the hollow bearing 15 during use is improved. The hollow shaft seat 17 can be used to limit the assembly of the hollow bearing 15 onto the hollow input shaft 10, thereby ensuring the convenience of installation of the hollow shaft seat 17.

[0039] An output shaft 18 connected to an external output end is arranged on the output shaft 18 seat 11, an output bearing cavity 19 is arranged in the output shaft 18 seat 11, an output bearing 20 sleeved on the hollow input shaft 10 is arranged in the output bearing cavity 19, a shaft limit seat 21 is arranged in the output bearing cavity 19 between the output shaft 18 seat 11 and the output shaft 18, the output bearing 20 is located on one side of the shaft limit seat 21, and the hollow input shaft 10 is embedded in the shaft limit seat 21.

[0040] By setting the output bearing cavity 19, an assembly space can be provided for the output bearing 20, thereby improving the use stability of the output shaft, and a shaft limit seat 21 is set in the output bearing cavity 19 between the output shaft 18 seat 11 and the output shaft 18. The shaft limit seat 21 can provide limiting support for the assembly of the hollow input shaft 10, thereby improving the use stability of the hollow input shaft 10.

[0041] A sealed bearing 23 is arranged on the output shaft 18, a sealed shaft seat 22 is arranged on the output shaft 18 near the hollow input shaft 10, a sealed shaft cavity is arranged between the sealed shaft seat 22 and the output flange 1, two groups of sealed bearings 23 are symmetrically arranged in the sealed shaft cavity, and the two groups of sealed bearings 23 are arranged at intervals, and a distance ring 24 is arranged in the interval space between the two groups of sealed bearings 23, and the two ends of the distance ring 24 are respectively pressed against the two groups of sealed bearings 23.

[0042] By setting the sealing shaft seat 22, a limiting effect can be provided for the installation of the sealing bearing 23, and the setting of the sealing bearing 23 can improve the use stability of the output shaft 18. The sealing shaft cavity can provide an assembly space for the sealing bearing 23 and can provide a flow space for the oil. The spacing between the two groups of sealing bearings 23 can improve the fluidity of the oil and provide sufficient flow space for the flow of the oil. The setting of the spacing ring 24 can provide limiting support for the two groups of sealing bearings 23 to ensure the support stability and use reliability of the two groups of sealing bearings 23.

[0043] A leakproof oil seal 25 is arranged between the front end of the output flange 1 and the output shaft 18, and a leakproof groove 26 is arranged at the front end of the output flange 1. The leakproof oil seal 25 is arranged in the leakproof groove 26, and the leakproof groove 26 and the output bearing cavity 19 are arranged at intervals, and an oil seal limit platform 27 is arranged in the interval space. By arranging the leakproof oil seal 25, leakage of oil in the sealed shaft cavity can be avoided. By arranging the leakproof groove 26, an assembly space can be provided for the leakproof oil seal 25, and the use stability of the leakproof oil seal 25 is improved. The leakproof groove 26 and the output bearing cavity 19 are arranged at intervals, which can provide sufficient flow space for the oil and avoid the leakproof oil seal 25 from limiting the flow of the oil. The setting of the oil seal limit platform 27 can provide an assembly space for the installation of the leakproof oil seal 25 and improve the assembly stability of the leakproof oil seal 25.

[0044] An external flange 28 is provided at one end of the output flange 1 away from the annular gear housing 3 . The external flange 28 is connected to the annular gear housing 3 by bolts. An external bolt hole is provided at one end of the external flange 28 away from the output flange 1 .

[0045] By providing the external flange 28, it is convenient to connect external equipment to the output flange 1, and the external flange 28 and the annular gear housing 3 are connected by bolts, which can improve the convenience of disassembly and the sealing reliability after assembly. The provision of the external bolt hole can facilitate the assembly of the external equipment.

[0046] A flange stopper 29 is provided on one side of the output flange 1 connected to the external flange 28 . The inner diameter of the external flange 28 matches the radial dimension of the outer diameter of the flange stopper 29 . The external flange 28 is buckled on the flange stopper 29 .

[0047] By setting a flange limit seat 29 on the side where the output flange 1 is connected to the external flange 28, the flange limit seat 29 is used to improve the assembly stability of the external flange 28, and the external flange 28 is buckled on the flange limit seat 29. The flange limit seat 29 can be used to guide the assembly of the external flange 28, thereby improving the convenience of assembly.

[0048] A lubrication cavity 30 is provided in the flange limit seat 29 , the hollow input shaft 10 passes through the lubrication cavity 30 , and an input oil seal 31 is sleeved on the hollow input shaft 10 , the input oil seal 31 is away from one end face of the annular gear housing 3 and is flush with the root end face of the flange limit seat 29 , and the rear end of the input oil seal 31 is spaced from the lubrication cavity 30 .

[0049] The setting of the lubrication chamber 30 can provide lubrication space for the hollow input shaft 10 in the flange limit seat 29, thereby improving the use stability of the hollow input shaft 10. The input oil seal 31 is moved away from the end face of one side of the annular gear housing 3 and flush with the root end face of the flange limit seat 29, thereby avoiding the input oil seal 31 from affecting the installation of the external flange 28. The interval between the rear end of the input oil seal 31 and the lubrication chamber 30 can provide sufficient flow space for the oil to ensure the reliability of the oil.

[0050] The present invention connects the two ends of the annular gear housing to the output flange and the input flange respectively through bolts, thereby improving the convenience of disassembly between the annular gear housing and the output flange and the input flange, and ensuring the sealing reliability after connection; a cycloid pin shaft with two ends respectively connected to the output flange and the input flange is provided in the cycloid cavity, which can facilitate the installation of the cycloid shaft sleeve and improve the working stability of the eccentric body in the cycloid cavity; the cycloid pin shaft cooperates with the connector, which can improve the connection stability and positioning accuracy between the annular gear housing and the output flange and the input flange, thereby ensuring the sealing between the annular gear housing and the output flange and the input flange.

[0051] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. All equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A cycloid gear reducer, characterized in that: include: An output flange and an input flange, and an annular gear housing connected between the output flange and the input flange; The two ends of the annular gear housing are respectively connected to the output flange and the input flange by bolts, an annular gear pin is arranged inside the annular gear housing, and a curved middle plate is also arranged on one side of the annular gear pin; A cycloid cavity is provided in the annular gear housing and inside the annular gear pin. A cycloid pin shaft is provided in the cycloid cavity, and its two ends are respectively connected to the output flange and the input flange. A cycloid shaft sleeve is sleeved on the cycloid pin shaft. An eccentric body is provided at the center of the cycloid cavity, and a hollow input shaft is provided at the center of the eccentric body.

2. The cycloid gear reducer according to claim 1, characterized in that: An output shaft seat and a support shaft seat are also provided between the two ends of the cycloid cavity and the output flange and the input flange. The cycloid sleeve is supported between the output shaft seat and the support shaft seat. The two ends of the cycloid pin shaft extend into the output shaft seat and the support shaft seat respectively. The output flange and the input flange are respectively provided with a first shaft seat limiting groove and a second shaft seat limiting groove. The output shaft seat is located in the first shaft seat limiting groove, and the support shaft seat is located in the second shaft seat limiting groove.

3. The cycloid gear reducer according to claim 1, characterized in that: A shaft seat limiting bearing is arranged between the support shaft seat and the input flange, the hollow input shaft passes through the support shaft seat, and a hollow bearing is sleeved on the hollow input shaft, a hollow groove is arranged on the support shaft seat, the hollow bearing is located in the hollow groove, a hollow shaft seat is arranged on the hollow bearing, and the radial width of the hollow bearing covers the hollow shaft seat and the input flange respectively.

4. The cycloid gear reducer according to claim 1, characterized in that: An output shaft connected to an external output end is arranged on the output shaft seat, an output bearing cavity is arranged in the output shaft seat, an output bearing sleeved on a hollow input shaft is arranged in the output bearing cavity, a shaft limiting seat is arranged in the output bearing cavity between the output shaft seat and the output shaft, the output bearing is located on one side of the shaft limiting seat, and the hollow input shaft is embedded in the shaft limiting seat.

5. The cycloid gear reducer according to claim 1, characterized in that: A sealed bearing is arranged on the output shaft, a sealed shaft seat is arranged on the output shaft near the side of the hollow input shaft, a sealed shaft cavity is arranged between the sealed shaft seat and the output flange, two groups of sealed bearings are symmetrically arranged in the sealed shaft cavity, and the two groups of sealed bearings are arranged at intervals, and a distance ring is arranged in the interval space between the two groups of sealed bearings, and two ends of the distance ring are respectively pressed against the two groups of sealed bearings.

6. The cycloid gear reducer according to claim 1, characterized in that: An anti-leakage oil seal is arranged between the front end of the output flange and the output shaft, an anti-leakage groove is arranged at the front end of the output flange, the anti-leakage oil seal is arranged in the anti-leakage groove, and the anti-leakage groove is arranged at a distance from the output bearing cavity, and an oil seal limit platform is arranged in the interval space.

7. The cycloid gear reducer according to claim 1, characterized in that: An external flange is arranged at one end of the output flange away from the annular gear housing, the external flange is connected to the annular gear housing via bolts, and an external bolt hole is arranged at one end of the external flange away from the output flange.

8. The cycloid gear reducer according to claim 1, characterized in that: A flange limiting seat is arranged on one side of the output flange connected to the external flange, the inner diameter of the external flange matches the radial dimension of the outer diameter of the flange limiting seat, and the external flange is buckled on the flange limiting seat.

9. The cycloid gear reducer according to claim 1, characterized in that: A lubrication cavity is arranged in the flange limit seat, the hollow input shaft passes through the lubrication cavity, and an input oil seal is sleeved on the hollow input shaft. The input oil seal is away from one end face of the annular gear housing and is flush with the root end face of the flange limit seat, and a rear end of the input oil seal is spaced from the lubrication cavity.

Images