CN215861545U - Worm gear reducer - Google Patents
Worm gear reducer Download PDFInfo
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- CN215861545U CN215861545U CN202121813643.XU CN202121813643U CN215861545U CN 215861545 U CN215861545 U CN 215861545U CN 202121813643 U CN202121813643 U CN 202121813643U CN 215861545 U CN215861545 U CN 215861545U
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- worm
- worm wheel
- output shaft
- shell
- wheel
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Abstract
The utility model discloses a worm and gear speed reducer which comprises a shell, an output shaft, a worm wheel supporting bearing, an adjusting gasket, a worm wheel, a positioning shaft sleeve, a worm end cover, a worm supporting bearing and a worm, wherein the output shaft, the worm wheel supporting bearing, the worm wheel, the positioning shaft sleeve, the worm end cover, the worm supporting bearing and the worm are arranged in the shell, the worm wheel supporting bearing is fixedly arranged in the shell, the output shaft is rotatably connected with the worm wheel supporting bearing, the worm wheel is fixedly arranged on the output shaft through a key, the adjusting gasket is sleeved on the output shaft and positioned at two ends of the worm wheel, and the positioning shaft sleeve is sleeved on the output shaft. According to the utility model, the adjusting washers are arranged on the two sides of the worm wheel, the relative position of the worm wheel relative to the worm is accurately adjusted by changing the thickness of the adjusting washers, the alignment of the central plane of the worm wheel and the rotation center of the worm is realized, the high-precision assembly of the worm wheel and the worm is ensured, and the adjustment of the installation gap of the worm wheel support shafts on the two sides of the output shaft in the shell is realized.
Description
Technical Field
The utility model relates to a worm gear reducer, and belongs to the technical field of worm gear reducers.
Background
The worm gear and worm transmission has the advantages of large transmission ratio and reverse self-locking, and is widely applied to the fields of space engineering and deep space exploration. The space environment of the spacecraft is a severe extreme environment with large temperature difference, high vacuum and strong radiation, the worm and gear reducer for ground industrial equipment usually adopts traditional lubrication such as oil bath lubrication, oil spray lubrication, grease lubrication and the like, and the characteristics of high and low stability, vacuum volatility and the like can not meet the requirements of the space environment. Meanwhile, the solid lubricating coating which is widely applied to the space moving part has stronger high and low temperature stability, extremely low vacuum volatility and better anti-extrusion capacity, but has poor anti-shearing capacity, and is only suitable for the transmission type of which the working surface is mainly stressed by extrusion. The tooth surfaces of the worm and gear speed reducer have larger relative sliding, so that the solid lubricating coating is easy to fall off, and the lubricating failure is caused. Therefore, the conventional lubrication cannot meet the lubrication requirement of the worm gear reducer under the space environment condition. In addition, according to the traditional design method of the worm gear reducer, a worm gear is made of copper alloy with a softer matrix, the material is low in strength and small in bearing capacity under the same volume, tooth surfaces are easily and rapidly abraded under the condition of poor lubrication, the system reliability is reduced, and the service life of a transmission mechanism is prolonged. Secondly, the weight of the spacecraft product has harsh requirements, and the conventional material selection of the reducer structural part does not meet the requirement of space engineering light weight.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the utility model provides a worm gear reducer which is suitable for severe and extreme environments with large temperature difference, high vacuum and strong radiation.
The utility model is formed as follows: a worm gear reducer comprises a shell, an output shaft, a worm gear supporting bearing, an adjusting washer, a worm gear, a positioning shaft sleeve, a worm end cover, a worm supporting bearing and a worm, wherein the output shaft, the worm gear supporting bearing, the adjusting washer, the worm gear, the positioning shaft sleeve, the worm end cover, the worm supporting bearing and the worm are arranged in the shell, a pair of worm wheel supporting bearings are fixedly arranged in the shell, an output shaft is rotatably connected on the worm wheel supporting bearings, a worm wheel is fixedly arranged on the output shaft through a key, adjusting washers are sleeved on the output shaft and positioned at two ends of the worm wheel, a positioning shaft sleeve is sleeved on the output shaft and tightly contacted with the adjusting washers in a propping manner, a pair of worm support bearings are fixedly arranged in the shell, a worm meshed with the worm wheel is rotatably connected on the worm support bearings, and the axial leads of the worm and the worm wheel are mutually vertical, the tooth surfaces of the worm wheel and the worm are both provided with self-lubricating films, and space high-temperature and low-temperature lubricating grease is coated between the tooth surfaces of the worm wheel and the worm.
Furthermore, worm wheel end covers are fixedly mounted at two ends of the output shaft in the shell, a through hole is formed in one of the worm wheel end covers, and the output end of the output shaft extends out of the through hole.
Further, a worm end cover is fixedly arranged in the shell and positioned at the end part of the worm.
Furthermore, the inner end of the output shaft is fixedly connected with an end plate through a fastening screw.
Due to the adoption of the technical scheme, the utility model has the advantages that:
1. according to the utility model, the adjusting washers are arranged on the two sides of the worm wheel, the relative position of the worm wheel relative to the worm is accurately adjusted by changing the thickness of the adjusting washers, the alignment of the central plane of the worm wheel and the rotation center of the worm is realized, the high-precision assembly of the worm wheel and the worm is ensured, and the adjustment of the installation gap of the worm wheel support shafts on the two sides of the output shaft in the shell is realized.
2. The tooth surfaces of the worm wheel and the worm are provided with self-lubricating films, space high-low temperature lubricating grease is coated between the tooth surfaces of the worm wheel and the worm, and the high-low temperature lubricating grease and the self-lubricating films form a solid-liquid composite lubricating system, so that reliable lubrication is ensured in the working process of the worm wheel and the worm, rapid abrasion of the transmission tooth surfaces of the worm wheel and the worm in the space extreme environment is avoided, and the reliability and the service life of the mechanism are improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is an assembly view of the output shaft and worm gear.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples.
The embodiment of the utility model comprises the following steps: as shown in fig. 1 to 3, a worm gear reducer comprises a housing 2, an output shaft 1, a worm gear support bearing 4, an adjusting washer 5, a worm gear 6, a positioning shaft sleeve 7, a worm end cover 9, a worm support bearing 10 and a worm 11, wherein the output shaft 1, the worm gear support bearing 4, the output shaft 1, the worm gear 6, the adjusting washer 5, the positioning shaft sleeve 7 and the adjusting washer 5 are fixedly arranged in the housing 2, the worm gear 6 is fixedly arranged on the output shaft 1 through a key, the adjusting washer 5 is sleeved on the output shaft 1 at two ends of the worm gear 6, the positioning shaft sleeve 7 is sleeved on the output shaft 1, the positioning shaft sleeve 7 is in abutting contact with the adjusting washer 5, the worm support bearing 10 is fixedly arranged in the housing 2, the worm support bearing 10 is rotatably connected with the worm 11 engaged with the worm gear 6, and the axial leads of the worm 11 and the worm gear 6 are perpendicular to each other, the tooth surfaces of the worm wheel and the worm are both provided with self-lubricating films, and space high-temperature and low-temperature lubricating grease is coated between the tooth surfaces of the worm wheel and the worm. In the present invention, the worm wheel 6 serves as a power output member, and the worm 11 serves as a power input member. The lubrication modes of the worm wheel supporting bearing 4 and the worm supporting bearing 10 are solid lubrication, so that the low-friction damping of the speed reducer is realized.
The worm 11 is made of one of alloy steel, stainless steel or bearing steel, and the heat treatment hardness reaches more than HRC 50; the worm wheel 6 is made of one of alloy steel, stainless steel or bearing steel, the hardness of the heat treatment surface reaches more than 50HRC, the worm wheel 6 and the worm 11 are made of different types of materials, and the hardness difference of the worm wheel and the worm is kept at 10 HRC. The hard tooth surface steel worm wheel is adopted, so that the strength and the wear resistance of the worm wheel 6 material are improved, the bearing capacity of the speed reducer is further improved, and the size is reduced.
Worm wheel end covers 3 are fixedly arranged at two ends of the output shaft 1 in the shell 2, a through hole is formed in one worm wheel end cover 3, the output end of the output shaft 1 extends out of the through hole, and the worm wheel 6 is axially positioned through the worm wheel end covers 3; and a worm end cover 9 is fixedly arranged at the end part of the worm 11 in the shell 2, and the axial positioning of the worm 11 is realized through the worm end cover 9. The inner end of the output shaft 1 is fixedly connected with an end plate 12 through a fastening screw 8, and the end plate 12 prevents components assembled on the output shaft 1 from loosening.
In the utility model, the connecting parts of the output shaft 1, the positioning shaft sleeve 7, the fastening screw 8 and the like are made of titanium alloy light materials, and the shell 2, the worm wheel end cover 3 and the worm end cover 9 are made of aluminum alloy light materials, so that the aim of reducing weight is fulfilled, and the requirement of lightening space products is met.
According to the utility model, the adjusting washers 5 are arranged on the two sides of the worm wheel 6, the relative position of the worm wheel 6 relative to the worm 11 is accurately adjusted by changing the thickness of the adjusting washers 5, the alignment of the central plane of the worm wheel 6 and the rotation center of the worm 11 is realized, the high-precision assembly of the worm wheel 6 and the worm 11 is ensured, and the adjustment of the installation clearance of the worm wheel support shafts on the two sides of the output shaft 1 in the shell 2 is realized.
The tooth surfaces of the worm wheel 6 and the worm 11 are subjected to tricresyl phosphate chemical surface treatment, a layer of low-melting-point alloy iron phosphate film is formed on the tooth surfaces of the worm wheel 6 and the worm 11 and serves as a self-lubricating film, space high-low temperature lubricating grease is coated between the tooth surfaces of the worm wheel 6 and the worm 11, the high-low temperature lubricating grease and the self-lubricating film form a solid-liquid composite lubricating system, reliable lubrication is guaranteed in the working process of the worm wheel 6 and the worm 11, rapid wear of the transmission tooth surface of the worm wheel and the worm in the space extreme environment is avoided, the reliability of the mechanism is improved, and the service life of the mechanism is prolonged.
Claims (4)
1. The utility model provides a worm gear reduction gear, includes casing (2) and sets up output shaft (1), worm wheel support bearing (4), adjusting washer (5), worm wheel (6), location axle sleeve (7), worm end cover (9), worm support bearing (10) and worm (11) in casing (2), its characterized in that: a pair of worm wheel supporting bearings (4) are fixedly arranged in the shell (2), an output shaft (1) is rotatably connected on the worm wheel supporting bearings (4), a worm wheel (6) is fixedly arranged on the output shaft (1) through a key, two ends of the output shaft (1) and positioned on the worm wheel (6) are sleeved with adjusting washers (5), meanwhile, a positioning shaft sleeve (7) is sleeved on the output shaft (1), the positioning shaft sleeve (7) is tightly contacted with the adjusting washer (5), a pair of worm support bearings (10) are also fixedly arranged in the shell (2), a worm (11) meshed with the worm wheel (6) is rotatably connected on the worm support bearing (10), the axial leads of the worm (11) and the worm wheel (6) are mutually vertical, the tooth surfaces of the worm wheel (6) and the worm (11) are both provided with self-lubricating films, meanwhile, space high-temperature and low-temperature grease is coated between the gear surface of the worm wheel (6) and the gear surface of the worm (11).
2. The worm gear reducer of claim 1, wherein: worm wheel end covers (3) are fixedly mounted at two ends of the output shaft (1) in the shell (2), a through hole is formed in one worm wheel end cover (3), and the output end of the output shaft (1) extends out of the through hole.
3. The worm gear reducer of claim 1, wherein: and a worm end cover (9) is fixedly arranged in the shell (2) and positioned at the end part of the worm (11).
4. The worm gear reducer of claim 1, wherein: the inner end of the output shaft (1) is fixedly connected with an end plate (12) through a fastening screw (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121813643.XU CN215861545U (en) | 2021-08-05 | 2021-08-05 | Worm gear reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121813643.XU CN215861545U (en) | 2021-08-05 | 2021-08-05 | Worm gear reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215861545U true CN215861545U (en) | 2022-02-18 |
Family
ID=80330011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121813643.XU Active CN215861545U (en) | 2021-08-05 | 2021-08-05 | Worm gear reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215861545U (en) |
-
2021
- 2021-08-05 CN CN202121813643.XU patent/CN215861545U/en active Active
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