CN219432401U - RV speed reducer with multistage seal structure - Google Patents
RV speed reducer with multistage seal structure Download PDFInfo
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- CN219432401U CN219432401U CN202320345355.9U CN202320345355U CN219432401U CN 219432401 U CN219432401 U CN 219432401U CN 202320345355 U CN202320345355 U CN 202320345355U CN 219432401 U CN219432401 U CN 219432401U
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Abstract
The utility model provides an RV speed reducer with a multistage sealing structure, which relates to the technical field of speed reducers and comprises a pin gear shell, an output shaft, an output end cover, a plurality of eccentric shafts, a planet wheel and two cycloidal gears, wherein the planet wheel and the two cycloidal gears are arranged at one end of each eccentric shaft; a first framework oil seal and a sealing gasket are arranged between the needle gear shell inner hole and the output shaft outer circle, and the sealing gasket is positioned between the first framework oil seal and the first bearing; a first cavity is formed between the sealing gasket and the first framework oil seal, and solid grease is filled in the first cavity. According to the utility model, a multistage sealing structure is arranged between the output shaft and the pin gear shell, so that the sealing performance of the speed reducer is improved, the phenomena of oil seepage and oil leakage of the speed reducer are reduced or even avoided, and the service effect and service life of the speed reducer are ensured.
Description
Technical Field
The utility model relates to the technical field of speed reducers, in particular to an RV speed reducer with a multistage sealing structure.
Background
The RV speed reducer is a novel speed reducer developed on the basis of cycloidal pin gear transmission, has the advantages of high rigidity, high precision, large torque, high transmission efficiency and the like, and has smaller volume and larger overload capacity compared with simple cycloidal pin gear planetary transmission.
In the prior art, only a skeleton oil seal is used for sealing between an output shaft and a pin gear shell in the RV speed reducer, the sealing performance of the skeleton oil seal product is different, hard particles possibly are mixed in the joint surface of the skeleton oil seal and the speed reducer in the assembly process, and the phenomena of oil seepage, oil leakage and the like can occur when the speed reducer is operated for a period of time and the service life is not reached, so that the service effect and the service life of the speed reducer are affected.
Disclosure of Invention
The utility model aims to provide an RV speed reducer with a multistage sealing structure, which improves the sealing performance of the speed reducer, reduces or even avoids the phenomena of oil seepage and oil leakage of the speed reducer and ensures the use effect and the service life of the speed reducer by arranging the multistage sealing structure between an output shaft and a pin gear shell.
The technical aim of the utility model is realized by the following technical scheme:
the RV reducer with the multistage sealing structure comprises a pin gear shell, an output shaft, an output end cover, at least two eccentric shafts and two cycloidal gears, wherein the eccentric shafts are arranged in a circumferential array, the output shaft is fixedly connected with the output end cover and rotates relative to the pin gear shell, a first bearing is arranged between the excircle of the output shaft and an inner hole of the pin gear shell, and a second bearing is arranged between the excircle of the output end cover and the inner hole of the pin gear shell; two ends of the eccentric shaft are respectively arranged in bearing holes of the output shaft and the output end cover through tapered roller bearings, and one end, close to the output end cover, of the eccentric shaft is provided with a planet wheel; the two cycloidal gears are respectively arranged on a cam of the eccentric shaft through a retainer roller bearing, and the outer teeth of the cycloidal gears are meshed with the inner teeth of the pin gear housing through rolling needles; a first framework oil seal and a sealing gasket are arranged between the needle gear shell inner hole and the output shaft outer circle, and the sealing gasket is positioned between the first framework oil seal and the first bearing; and a cavity I is formed between the sealing gasket and the first framework oil seal, and solid grease is filled in the cavity I.
By adopting the technical scheme, the basic structure and the working principle of the RV reducer are the same as those of the prior art, and the output shaft and the pin gear shell in the RV reducer in the prior art are sealed by using only the framework oil seal. The sealing gasket is used as the first-stage seal of the RV speed reducer from inside to outside, seals oil flowing out of a rolling body gap of the bearing and a gap between the bearing and the output shaft, solid grease in the cavity is used as the second-stage seal of the RV speed reducer from inside to outside, the first skeleton oil seal is used as the third-stage seal of the RV speed reducer from inside to outside, the multistage sealing structure effectively improves the sealing performance of the RV speed reducer, reduces the dependence on the sealing of the first skeleton oil seal, reduces the oil leakage risk of the RV speed reducer, ensures the using effect of the RV speed reducer, and prolongs the service life of the RV speed reducer. In addition, solid grease in the first cavity plays a role in lubricating the first framework oil seal, so that the service life of the first framework oil seal is prolonged, and further the overall sealing effect and the service life of the RV reducer are improved.
Further, the needle gear shell inner hole is provided with a first step ring groove matched with the outer circle of the sealing gasket, and the outer circle of the output shaft is provided with a mounting ring groove matched with the inner circle of the sealing gasket; the lower end of the outer ring of the sealing gasket is fixedly arranged on the first step annular groove, and the inner ring of the sealing gasket is rotatably arranged in the mounting annular groove.
Through adopting above-mentioned technical scheme, the outer lane fixed mounting of sealing washer is on first step annular, and sealing washer's inner circle is rotated and is installed in the installation annular, and sealing washer is static, relative output shaft rotation with respect to the needle tooth shell like this, is static seal between sealing washer and the needle tooth shell. The installation ring groove is used for limiting and installing the sealing gasket, so that the installation stability and the sealing performance of the sealing gasket are guaranteed, the structure is simple, the installation of the sealing gasket is convenient to realize, and the effect is obvious.
Further, the needle gear shell inner hole is provided with a first step ring groove matched with the outer circle of the sealing gasket, and the outer circle of the output shaft is provided with a mounting ring groove matched with the inner circle of the sealing gasket; the inner ring of the sealing gasket is fixedly arranged in the mounting annular groove, the lower end of the outer ring of the sealing gasket is rotatably arranged in the first step annular groove, and a first O-shaped sealing ring matched with the lower end face of the sealing gasket is embedded in the first step annular groove.
Through adopting above-mentioned technical scheme, the inner circle fixed mounting of sealing washer is in the installation annular, and sealing washer's outer lane rotates to be installed in first step annular, and sealing washer is static, relative needle tooth shell rotation with respect to the output shaft like this, is static seal between sealing washer and the output shaft. The first O-shaped sealing ring matched with the lower end face of the sealing gasket is embedded in the first step annular groove, abrasion between the outer ring of the sealing gasket and the needle gear shell is reduced by the aid of the first O-shaped sealing ring, sealing performance between the sealing gasket and the needle gear shell is improved, and the sealing device is simple in structure and obvious in effect.
Further, one side of the first bearing close to the output shaft is provided with a bearing inner ring, one side of the first bearing close to the needle gear shell is provided with a bearing outer ring, a second framework oil seal is arranged between the bearing inner ring and the inner hole of the needle gear shell, the second framework oil seal is positioned on one side of the bearing outer ring away from the second bearing, and the sealing gasket is positioned between the first framework oil seal and the second framework oil seal.
Through adopting above-mentioned technical scheme, the second skeleton oil blanket sets up between bearing inner race and needle gear shell hole, as RV speed reducer from interior to outside first level seal structure, correspondingly sealing washer, solid-state grease in cavity one, first skeleton oil blanket becomes RV speed reducer from interior to outside second, third, fourth level seal structure, forms fourth level seal structure like this, further improves RV speed reducer's sealing performance, reduces and avoids the oil leak risk even, satisfies the application scope of various abominable operating modes, effectively improves application scope. In addition, the probability that hard particles are mixed with simultaneously appears in first skeleton oil blanket and second skeleton oil blanket is much lower than the probability that hard particles are mixed with appears in one skeleton oil blanket, and the second skeleton oil blanket is sealed for first level, and first skeleton oil blanket is sealed for last level, has sealing washer and cavity in the centre solid grease as sealed buffering, avoids appearing the oil leak phenomenon to a great extent.
Further, a second cavity is formed between the second framework oil seal and the sealing gasket, and solid grease is filled in the second cavity.
Through adopting above-mentioned technical scheme, solid-state grease in the cavity II is as RV speed reducer from interior to outer second grade seal structure, correspondingly sealing washer, solid-state grease in cavity I, first skeleton oil blanket becomes RV speed reducer from interior to outer third, fourth, five grade seal structure, form five grade seal structure like this, rational utilization second skeleton oil blanket and sealing washer between cavity II, further improve RV speed reducer's sealing performance, reduce and even avoid the oil leak risk, satisfy the application scope of various abominable operating mode, effectively improve application scope, guarantee the result of use and the life of speed reducer.
Further, a second step ring groove matched with the bearing inner ring is formed in the outer circle of the output shaft, a second O-shaped sealing ring is arranged between the output shaft and the bearing inner ring, and a mounting groove matched with the second O-shaped sealing ring is formed in the second step ring groove of the output shaft.
Through adopting above-mentioned technical scheme, output shaft excircle set up with bearing inner race complex second step annular, the spacing installation of bearing inner race of being convenient for, and guarantee the stability of bearing installation. And a second O-shaped sealing ring is arranged between the bearing inner ring and the output shaft, so that the bearing inner ring and the output shaft are sealed, and the sealing pressure of solid grease and a sealing gasket in the first cavity is relieved. The first bearing can use standard components without additionally processing the mounting groove on the first bearing.
Further, the second O-shaped sealing ring is positioned between the outer circle of the second step ring groove on the output shaft and the inner hole of the bearing inner ring, and the mounting groove is arranged on the outer circle of the second step ring groove on the output shaft.
Further, the second O-shaped sealing ring is located between the horizontal end face of the second step annular groove on the output shaft and the horizontal end face of the bearing inner ring, and the mounting groove is formed in the horizontal end face of the second step annular groove on the output shaft.
By adopting the technical scheme, two mounting positions are provided for the second O-shaped sealing ring, and the sealing effect of the second O-shaped sealing ring on the excircle of the output shaft and the bearing inner ring is ensured.
In summary, the utility model has the following beneficial effects:
1. according to the utility model, the sealing gasket, the solid grease in the cavity I and the first framework oil seal form a three-stage sealing structure from inside to outside between the pin gear shell and the output shaft, so that the sealing performance of the RV reducer is effectively improved, the oil leakage risk is greatly reduced, and the RV reducer is suitable for various severe working conditions;
2. according to the utility model, the second framework oil seal, the solid grease in the second cavity, the sealing gasket, the solid grease in the first cavity and the first framework oil seal form a five-stage sealing structure from inside to outside at the output end of the RV reducer, so that the sealing performance of the RV reducer is further improved, the oil leakage phenomenon is reduced or even avoided, the use effect of the RV reducer is ensured, and the service life of the RV reducer is prolonged;
3. the utility model improves the original structure of the RV reducer, has limited added cost, but obviously improves the sealing performance and greatly reduces the oil leakage and oil seepage probability.
Drawings
Fig. 1 is a schematic structural diagram of an RV reducer with a multistage seal structure in the first embodiment;
fig. 2 is a schematic structural diagram of an RV reducer with a multistage seal structure in the second embodiment;
fig. 3 is a schematic structural diagram of an RV reducer with a multistage seal structure in the third embodiment;
fig. 4 is a schematic structural diagram of an RV reducer with a multistage seal structure in the fourth embodiment;
fig. 5 is a schematic structural diagram of an RV reducer with a multistage seal structure in a fifth embodiment;
fig. 6 is a schematic structural diagram of an RV reducer with a multistage seal structure in a sixth embodiment.
In the figure, 1, needle gear housing; 11. needle roller; 12. a first stepped annular groove; 13. a first O-ring seal; 2. an output shaft; 21. installing a ring groove; 22. a second step ring groove; 23. a mounting groove; 24. a second O-ring seal; 3. an output end cap; 4. an eccentric shaft; 41. tapered roller bearings; 42. a planet wheel; 5. cycloidal gears; 51. cage roller bearings; 6. a first bearing; 61. a bearing inner ring; 62. a bearing outer ring; 63. a second framework oil seal; 7. a second bearing; 8. a first framework oil seal; 9. a sealing gasket; 91. a first cavity; 10. and a second cavity.
Detailed Description
The utility model will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Embodiment one:
the utility model provides a RV speed reducer with multistage seal structure, as shown in figure 1, including needle tooth shell 1, output shaft 2, output end cover 3, at least two eccentric shafts 4 that circumference array set up, two cycloidal gears 5, be the assembly through screw and pin fixed connection between output shaft 2 and the output end cover 3, be equipped with bearing one 6 between the excircle of output shaft 2 and the needle tooth shell 1 hole, be equipped with bearing two 7 between output end cover 3 excircle and the needle tooth shell 1 hole, the assembly that output shaft 2 and output end cover 3 connect is installed on needle tooth shell 1 through bearing one 6 and bearing two 7, and can relative rotation with between the needle tooth shell 1. The two ends of the eccentric shaft 4 are respectively arranged in bearing holes of the output shaft 2 and the output end cover 3 through tapered roller bearings 41, and a planet wheel 42 is arranged at one end of the eccentric shaft 4 close to the output end cover 3. The two cycloid gears 5 are respectively mounted on the cams of the eccentric shaft 4 through retainer roller bearings 51, and the external teeth of the cycloid gears 5 are meshed with the internal teeth of the pin housing 1 through needle rollers 11. The basic structure and the working principle of the RV reducer are the same as those in the prior art, and are not improvement points of the utility model and are not repeated.
As shown in fig. 1, to realize the seal between the pin gear housing 1 and the output shaft 2, a first skeleton oil seal 8 and a sealing gasket 9 are arranged between the inner hole of the pin gear housing 1 and the outer circle of the output shaft 2, and the sealing gasket 9 is positioned between the first skeleton oil seal 8 and the first bearing 6. A first cavity 91 is formed between the sealing gasket 9 and the first framework oil seal 8, and solid grease is filled in the first cavity 91. The sealing gasket 9 is used as a first-stage seal of the RV speed reducer from inside to outside and seals oil flowing out of a rolling body gap of the bearing I6 and a gap between the bearing I6 and the output shaft 2, solid grease in the cavity I91 is used as a second-stage seal of the RV speed reducer from inside to outside, and the first framework oil seal 8 is used as a third-stage seal of the RV speed reducer from inside to outside.
As shown in fig. 1, the three-stage sealing structure is formed between the pin gear housing 1 and the output shaft 2, so that the sealing performance of the RV reducer is effectively improved, the dependence on sealing of the first framework oil seal 8 is reduced, the oil leakage risk of the RV reducer is reduced, the using effect of the RV reducer is ensured, and the service life of the RV reducer is prolonged. In addition, the solid grease in the first cavity 91 plays a role in lubricating the first framework oil seal 8, so that the service life of the first framework oil seal 8 is prolonged, and further the overall sealing effect and the service life of the RV reducer are improved. The first framework oil seal 8 may have a single lip structure or a double lip structure.
As shown in fig. 1, in order to realize the installation of the sealing washer 9, in this embodiment, a first step ring groove 12 matched with the outer circle of the sealing washer 9 is provided in the inner hole of the pin gear housing 1, and an installation ring groove 21 matched with the inner circle of the sealing washer 9 is provided on the outer circle of the output shaft 2. The lower end of the outer ring of the sealing gasket 9 is fixedly arranged on the first step ring groove 12, the sealing gasket 9 is static relative to the needle gear shell 1, static sealing is arranged between the sealing gasket 9 and the needle gear shell, and the risk of oil leakage between the sealing gasket and the needle gear shell is reduced. The inner ring of the sealing gasket 9 is rotatably arranged in the mounting annular groove 21, the sealing gasket 9 rotates relative to the output shaft 2, and the mounting annular groove 21 can slow down oil leakage caused by abrasion between the sealing gasket 9 and the output shaft 2 while limiting and mounting of the sealing gasket 9 are realized.
Embodiment two:
as shown in fig. 1 and 2, the RV speed reducer with a multistage sealing structure is different from the first embodiment in that an inner ring of a sealing washer 9 is fixedly installed in an installation ring groove 21 on the outer circle of an output shaft 2, the lower end of the outer ring of the sealing washer 9 is rotatably installed in a first step ring groove 12 on a needle gear housing 1, and a first O-shaped sealing ring 13 matched with the lower end face of the sealing washer 9 is embedded in the first step ring groove 12. Thus, the sealing gasket 9 is static relative to the output shaft 2 and rotates relative to the needle gear shell 1, static sealing is adopted between the sealing gasket 9 and the output shaft 2, leakage between the sealing gasket 9 and the output shaft is reduced, abrasion between the outer ring of the sealing gasket 9 and the needle gear shell 1 can be reduced by the first O-shaped sealing ring 13, and sealing performance between the sealing gasket 9 and the needle gear shell 1 is improved.
Embodiment III:
the utility model provides a RV speed reducer with multistage seal structure, as shown in figure 3, including needle tooth shell 1, output shaft 2, output end cover 3, at least two eccentric shafts 4 that circumference array set up, two cycloidal gears 5, be the assembly through screw and pin fixed connection between output shaft 2 and the output end cover 3, be equipped with bearing one 6 between the excircle of output shaft 2 and the needle tooth shell 1 hole, be equipped with bearing two 7 between output end cover 3 excircle and the needle tooth shell 1 hole, the assembly that output shaft 2 and output end cover 3 connect is installed on needle tooth shell 1 through bearing one 6 and bearing two 7, and can relative rotation with between the needle tooth shell 1. The two ends of the eccentric shaft 4 are respectively arranged in bearing holes of the output shaft 2 and the output end cover 3 through tapered roller bearings 41, and a planet wheel 42 is arranged at one end of the eccentric shaft 4 close to the output end cover 3. The two cycloid gears 5 are respectively mounted on the cams of the eccentric shaft 4 through retainer roller bearings 51, and the external teeth of the cycloid gears 5 are meshed with the internal teeth of the pin housing 1 through needle rollers 11. The basic structure and the working principle of the RV reducer are the same as those in the prior art, and are not improvement points of the utility model and are not repeated.
As shown in fig. 3, to achieve the sealing between the needle gear housing 1 and the output shaft 2, a bearing inner ring 61 is arranged on one side of the bearing 1 close to the output shaft 2, a bearing outer ring 62 is arranged on one side of the bearing 6 close to the needle gear housing 1, a second framework oil seal 63 is arranged between the bearing inner ring 61 and the inner hole of the needle gear housing 1, and the second framework oil seal 63 is positioned on one side of the bearing outer ring 62 away from the bearing two 7. A first framework oil seal 8 and a sealing gasket 9 are arranged between the inner hole of the needle gear shell 1 and the outer circle of the output shaft 2, and the sealing gasket 9 is positioned between the first framework oil seal 8 and the second framework oil seal 63. A second cavity 10 is formed between the second framework oil seal 63 and the sealing gasket 9, and solid grease is filled in the second cavity 10. A cavity one 91 is formed between the sealing gasket 9 and the first frame oil seal 8, and solid grease is filled in the cavity one 91. The first frame oil seal 8 and the second frame oil seal 63 may have a single lip structure or a double lip structure.
As shown in fig. 3, the second skeleton oil seal 63 is used as a first-stage sealing structure of the RV speed reducer from inside to outside, the solid grease in the cavity two 10 is used as a second-stage sealing structure of the RV speed reducer from inside to outside, the sealing gasket 9 is used as a third-stage sealing structure of the RV speed reducer from inside to outside, the solid grease in the cavity one 91 is used as a fourth-stage sealing structure of the RV speed reducer from inside to outside, and the first skeleton oil seal 8 is used as a fifth-stage sealing structure of the RV speed reducer from inside to outside. Thus, a five-stage sealing structure is formed at the output end of the RV speed reducer, the sealing performance of the RV speed reducer is greatly improved, the oil leakage risk is reduced or even avoided, the application range of various severe working conditions is met, and the application range is effectively improved. In addition, the probability that the first framework oil seal 8 and the second framework oil seal 63 are mixed with hard particles is much lower than the probability that one framework oil seal is mixed with hard particles, the second framework oil seal 63 is a first-stage seal, the first framework oil seal 8 is a last-stage seal, solid grease in the second cavity 10, the sealing gasket 9 and solid grease in the first cavity 91 are used as sealing buffering, and oil leakage is avoided to a great extent.
As shown in fig. 1 and 3, in order to realize the installation of the sealing washer 9, in the present embodiment, as in the first embodiment, a first stepped annular groove 12 matching with the outer circle of the sealing washer 9 is provided in the inner hole of the pin housing 1, and an installation annular groove 21 matching with the inner circle of the sealing washer 9 is provided on the outer circle of the output shaft 2. The lower end of the outer ring of the sealing gasket 9 is fixedly arranged on the first step ring groove 12, and the sealing gasket 9 is static relative to the needle gear shell 1; the inner ring of the sealing washer 9 is rotatably mounted in the mounting ring groove 21, and the sealing washer 9 rotates relative to the output shaft 2.
As shown in fig. 3, in order to further improve the sealing performance, a second stepped ring groove 22 is provided on the outer circumference of the output shaft 2, in which a bearing inner ring 61 is fitted, and the bearing inner ring 61 is installed in the second stepped ring groove 22. A second O-ring 24 is provided between the output shaft 2 and the bearing inner ring 61, and a mounting groove 23 which is matched with the second O-ring 24 is provided on the second stepped ring groove 22 of the output shaft 2. The second O-ring 24 seals between the bearing inner ring 61 and the output shaft 2, and reduces the sealing pressure of the solid grease and the sealing gasket 9 in the first cavity 91. In the present embodiment, the second O-ring 24 is located between the outer circumference of the second stepped annular groove 22 on the output shaft 2 and the inner bore of the bearing inner ring 61, and the mounting groove 23 is provided on the outer circumference of the second stepped annular groove 22 on the output shaft 2.
Embodiment four:
as shown in fig. 3 and 4, the RV speed reducer having a multistage seal structure is different from the third embodiment in that a second O-ring 24 is located between the horizontal end face of a second stepped ring groove 22 on the output shaft 2 and the horizontal end face of a bearing inner race 61, and a mounting groove 23 is provided on the horizontal end face of the second stepped ring groove 22 on the output shaft 2.
Fifth embodiment:
as shown in fig. 3 and 5, the RV speed reducer with a multistage sealing structure is different from the third embodiment in that the installation of the sealing washer 9 is the same as that of the second embodiment, that is, a first stepped ring groove 12 matched with the outer circle of the sealing washer 9 is provided in the inner hole of the pin gear housing 1, and a mounting ring groove 21 matched with the inner circle of the sealing washer 9 is provided on the outer circle of the output shaft 2. The inner ring of the sealing washer 9 is fixedly arranged in a mounting ring groove 21 on the outer circle of the output shaft 2, the lower end of the outer ring of the sealing washer 9 is rotatably arranged in a first step ring groove 12 on the needle gear shell 1, and a first O-shaped sealing ring 13 matched with the lower end face of the sealing washer 9 is embedded in the first step ring groove 12. The sealing gasket 9 is static relative to the output shaft 2 and rotates relative to the needle gear shell 1, static sealing is adopted between the sealing gasket 9 and the output shaft 2, leakage between the sealing gasket 9 and the output shaft is reduced, abrasion between the outer ring of the sealing gasket 9 and the needle gear shell 1 can be reduced by the first O-shaped sealing ring 13, and sealing performance between the sealing gasket 9 and the needle gear shell 1 is improved.
Example six:
as shown in fig. 4 and 6, the RV speed reducer with a multistage sealing structure is different from the fourth embodiment in that the installation of the sealing washer 9 is the same as that of the second embodiment, that is, a first stepped ring groove 12 matching with the outer circle of the sealing washer 9 is provided in the inner hole of the pin gear housing 1, and a mounting ring groove 21 matching with the inner circle of the sealing washer 9 is provided on the outer circle of the output shaft 2. The inner ring of the sealing washer 9 is fixedly arranged in a mounting ring groove 21 on the outer circle of the output shaft 2, the lower end of the outer ring of the sealing washer 9 is rotatably arranged in a first step ring groove 12 on the needle gear shell 1, and a first O-shaped sealing ring 13 matched with the lower end face of the sealing washer 9 is embedded in the first step ring groove 12.
While the foregoing description illustrates and describes the preferred embodiments of the present utility model, as noted above, it is to be understood that the utility model is not limited to the forms disclosed herein but is not to be construed as excluding other embodiments, and that various other combinations, modifications and environments are possible and may be made within the scope of the inventive concepts described herein, either by way of the foregoing teachings or by those of skill or knowledge of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.
Claims (8)
1. RV speed reducer with multistage seal structure, its characterized in that: the novel gear transmission mechanism comprises a pin gear shell (1), an output shaft (2), an output end cover (3), at least two eccentric shafts (4) arranged in a circumferential array and two cycloidal gears (5), wherein the output shaft (2) is fixedly connected with the output end cover (3) and rotates relative to the pin gear shell (1), a first bearing (6) is arranged between the outer circle of the output shaft (2) and an inner hole of the pin gear shell (1), and a second bearing (7) is arranged between the outer circle of the output end cover (3) and the inner hole of the pin gear shell (1); two ends of the eccentric shaft (4) are respectively arranged in bearing holes of the output shaft (2) and the output end cover (3) through tapered roller bearings (41), and a planet wheel (42) is arranged at one end, close to the output end cover (3), of the eccentric shaft (4); the two cycloid gears (5) are respectively arranged on a cam of the eccentric shaft (4) through retainer roller bearings (51), and external teeth of the cycloid gears (5) are meshed with internal teeth of the pin gear housing (1) through rolling pins (11); a first framework oil seal (8) and a sealing gasket (9) are arranged between the inner hole of the pin gear shell (1) and the outer circle of the output shaft (2), and the sealing gasket (9) is positioned between the first framework oil seal (8) and the first bearing (6); a first cavity (91) is formed between the sealing gasket (9) and the first framework oil seal (8), and solid grease is filled in the first cavity (91).
2. The RV speed reducer with a multistage sealing structure of claim 1, wherein: the inner hole of the pin gear shell (1) is provided with a first step ring groove (12) matched with the outer circle of the sealing gasket (9), and the outer circle of the output shaft (2) is provided with a mounting ring groove (21) matched with the inner circle of the sealing gasket (9); the lower end of the outer ring of the sealing gasket (9) is fixedly arranged on the first step annular groove (12), and the inner ring of the sealing gasket (9) is rotatably arranged in the mounting annular groove (21).
3. The RV speed reducer with a multistage sealing structure of claim 1, wherein: the inner hole of the pin gear shell (1) is provided with a first step ring groove (12) matched with the outer circle of the sealing gasket (9), and the outer circle of the output shaft (2) is provided with a mounting ring groove (21) matched with the inner circle of the sealing gasket (9); the inner ring of the sealing gasket (9) is fixedly arranged in the mounting ring groove (21), the lower end of the outer ring of the sealing gasket (9) is rotatably arranged in the first step ring groove (12), and a first O-shaped sealing ring (13) matched with the lower end face of the sealing gasket (9) is embedded in the first step ring groove (12).
4. A RV speed reducer with a multistage sealing structure according to any one of claims 1-3, characterized in that: one side that bearing one (6) is close to output shaft (2) is equipped with bearing inner race (61), and one side that is close to needle tooth shell (1) is equipped with bearing outer lane (62), be equipped with second skeleton oil blanket (63) between bearing inner race (61) and needle tooth shell (1) hole, second skeleton oil blanket (63) are located one side that bearing outer lane (62) kept away from bearing two (7), just sealing washer (9) are located between first skeleton oil blanket (8) and second skeleton oil blanket (63).
5. The RV speed reducer with multistage sealing structure of claim 4, wherein: and a second cavity (10) is formed between the second framework oil seal (63) and the sealing gasket (9), and solid grease is filled in the second cavity (10).
6. The RV speed reducer with multistage sealing structure of claim 5, wherein: the bearing inner ring (61) matched second step ring groove (22) is formed in the outer circle of the output shaft (2), a second O-shaped sealing ring (24) is arranged between the output shaft (2) and the bearing inner ring (61), and a mounting groove (23) matched with the second O-shaped sealing ring (24) is formed in the second step ring groove (22) of the output shaft (2).
7. The RV speed reducer with multistage sealing structure of claim 6, wherein: the second O-shaped sealing ring (24) is positioned between the outer circle of the second step ring groove (22) on the output shaft (2) and the inner hole of the bearing inner ring (61), and the mounting groove (23) is arranged on the outer circle of the second step ring groove (22) on the output shaft (2).
8. The RV speed reducer with multistage sealing structure of claim 6, wherein: the second O-shaped sealing ring (24) is positioned between the horizontal end face of the second step annular groove (22) on the output shaft (2) and the horizontal end face of the bearing inner ring (61), and the mounting groove (23) is arranged on the horizontal end face of the second step annular groove (22) on the output shaft (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202320345355.9U CN219432401U (en) | 2023-02-28 | 2023-02-28 | RV speed reducer with multistage seal structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320345355.9U CN219432401U (en) | 2023-02-28 | 2023-02-28 | RV speed reducer with multistage seal structure |
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| CN219432401U true CN219432401U (en) | 2023-07-28 |
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| CN202320345355.9U Active CN219432401U (en) | 2023-02-28 | 2023-02-28 | RV speed reducer with multistage seal structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118548314A (en) * | 2024-07-30 | 2024-08-27 | 河北智昆精密传动科技有限公司 | RV speed reducer and sealing structure thereof |
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2023
- 2023-02-28 CN CN202320345355.9U patent/CN219432401U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118548314A (en) * | 2024-07-30 | 2024-08-27 | 河北智昆精密传动科技有限公司 | RV speed reducer and sealing structure thereof |
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