A three-stage transmission helical planetary gear reducer
By adopting the three-stage transmission helical toothed planetary gear reducer design in the planetary reducer, the helical toothed and gear meshing structure increases the transmission torque, and reduces wear through the shaft sleeve and elastic retaining ring, the volume in the prior art is solved The problem of small transmission torque is that both smaller size and larger torque are achieved.
Patent Information
- Application Number
- CN201911019073.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-10-24
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2039-10-24
AI Technical Summary
It is difficult for existing planetary reducers to achieve small size and large transmission torque at the same time. The planetary wheels of the third-level transmission reducers occupy a large space and cannot meet the needs of some fields. The transmission torque of the small first-level reducers is insufficient.
The three-stage transmission helical planetary gear reducer is adopted to realize the three-stage transmission through the helical meshing structure of the input shaft, the second rotating shaft and the spline shaft. Combined with the meshing method between the gear and the gear shaft, the transmission torque is increased, and through The sleeve and elastic retaining ring reduce wear.
It achieves an increase in transmission torque, while reducing the equipment volume, extending service life, making the transmission more stable and less noise.
Smart Images
Figure CN110617301B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a planetary reducer, in particular to a three-stage transmission helical gear planetary gear reducer. Background Art
[0002] A planetary reducer is a power transmission mechanism that can use the small gear on the input mechanism to mesh with the large gear on the output mechanism to achieve the purpose of deceleration, reduce the number of revolutions of the motor to the required number of revolutions, and obtain a larger torque. With the rapid development of the planetary reducer industry, it is widely used in chemical, light industry, pharmaceutical, metallurgy, mining, papermaking, electronic instruments, glass, environmental protection and other mechanical equipment fields. In various fields, it is hoped that the planetary reducer has a small size and a large transmission torque. However, in the existing planetary reducers, the three-stage transmission reducer with a large transmission torque mostly adopts a three-stage planetary gear structure. The planetary gear occupies a large space, which makes the entire reducer very large and cannot meet the requirements of some fields. The small-sized first-stage reducer has a very small transmission torque and cannot meet the requirements of some fields. Summary of the invention
[0003] The object of the present invention is to provide a three-stage helical planetary gear reducer, which is used to solve the problem that the planetary reducer in the prior art cannot achieve both small size and large transmission torque.
[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a three-stage transmission helical planetary gear reducer, comprising a case cover, an intermediate case body, an outer case body, an input shaft, a second rotating shaft, a spline shaft, planetary gears and a planetary carrier, the input shaft is a helical gear shaft, the input end of the input shaft is rotatably connected to the planetary carrier through a first bearing, the output end of the input shaft is rotatably connected to the case cover through a second bearing, and the output end of the input shaft is provided with helical teeth; the second rotating shaft is a helical gear shaft, the input end of the second rotating shaft is rotatably connected to the case cover through a third bearing, the input end of the second rotating shaft is fixedly connected with a first gear, the first gear is a helical gear, the first gear is meshed with the helical teeth at the output end of the input shaft, and the output end of the second rotating shaft is provided with The second rotating shaft is rotatably connected to the intermediate housing through the fourth bearing; the spline shaft sleeve is arranged on the input shaft and is rotatably connected to the intermediate housing through the fifth bearing and the sixth bearing; the input end of the spline shaft is fixedly connected with the second gear, the second gear is a helical gear, the second gear is meshed with the helical teeth at the output end of the second rotating shaft, and the output end of the spline shaft is provided with spur teeth; a plurality of pins are fixedly connected to the outer housing, the planetary gears correspond to the pins one by one, the planetary gears are rotatably connected to the pins, the spur teeth at the output end of the spline shaft are meshed with the planetary gears, the planetary gears are meshed with the planetary carrier, and the output end of the planetary carrier is rotatably connected to the outer housing through the seventh bearing; the outer housing and the housing cover are respectively fixedly connected to the two ends of the intermediate housing by bolts.
[0005] Optionally, a spacer sleeve is sleeved on the input end of the spline shaft, a spline sleeve is sleeved on the output end of the spline shaft, a first wear-resistant sleeve is sleeved on the spline sleeve, and the first wear-resistant sleeve is located between the spline sleeve and the planet carrier.
[0006] Optionally, a first oil seal is arranged between the outer housing and the planetary carrier, and the first oil seal is located on the inner side of the seventh bearing. A second oil seal is arranged between the planetary carrier and the input shaft, and the second oil seal is located on the outer side of the first bearing. An elastic retaining ring for the first hole is arranged between the second oil seal and the first bearing, and the elastic retaining ring for the first hole is fitted with the first bearing.
[0007] Optionally, a shaft sleeve is sleeved on the planetary frame, the shaft sleeve is located between the planetary frame and the outer box body, and a first shaft elastic retaining ring is sleeved on the shaft sleeve, and the first shaft elastic retaining ring is fitted with the shaft sleeve.
[0008] Optionally, a second shaft elastic retaining ring is sleeved on the input end of the spline shaft, and the second shaft elastic retaining ring is located on the inner side of the fifth bearing and fits with the fifth bearing.
[0009] Optionally, the first bearing, the second bearing, the third bearing, the fifth bearing, the sixth bearing and the seventh bearing are all deep groove ball bearings, and the fourth bearing is a cylindrical roller bearing.
[0010] Optionally, a second wear-resistant sleeve is sleeved on the pin shaft, and the second wear-resistant sleeve is located between the pin shaft and the planetary gear.
[0011] Optionally, there are three planetary gears and three pins.
[0012] The three-stage helical planetary gear reducer of the present invention has the following advantages:
[0013] (1) The transmission between the helical teeth at the output end of the input shaft and the first gear is the first-stage transmission, the transmission between the helical teeth at the output end of the second shaft and the second gear is the second-stage transmission, and the transmission between the spur teeth at the output end of the spline shaft and the planetary gear is the third-stage transmission. The first-stage transmission and the second-stage transmission adopt the helical gear meshing mode and the three-stage transmission structure, which can achieve the effect of increasing the transmission torque.
[0014] (2) Both the first and second stage transmissions use a transmission method in which gears mesh with gear shafts. Compared with the larger planetary gear transmission method, this greatly reduces the size of the entire equipment.
[0015] (3) The use of various bushings can reduce the wear of other important parts and extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention. DETAILED DESCRIPTION
[0017] The present invention is further described below in conjunction with the accompanying drawings. In this embodiment, the left position relationship corresponds to the inner side in the claims, and the right position relationship corresponds to the outer side in the claims.
[0018] like Figure 1 As shown, a three-stage helical planetary gear reducer includes a case cover 1, an intermediate case body 2, an outer case body 3, an input shaft 4, a second rotating shaft 9, a spline shaft 13, a planetary gear 22 and a planetary carrier 25. The input shaft 4 is a helical gear shaft. The input end of the input shaft 4 is rotatably connected to the planetary carrier 25 through a first bearing 5. A second oil seal 7 is arranged between the input shaft 4 and the planetary carrier 25. The second oil seal 7 is located on the right side of the first bearing 5. A first hole elastic retaining ring 6 is arranged between the second oil seal 7 and the first bearing 5. The first hole elastic retaining ring 6 is fitted with the first bearing. The elastic retaining ring 6 can prevent the first bearing 5 from moving to the right. The output end of the input shaft 4 is rotatably connected to the box cover 1 through the second bearing 8, and the output end of the input shaft 4 is provided with helical teeth; the second rotating shaft 9 is a helical gear shaft, and the input end of the second rotating shaft 9 is rotatably connected to the box cover 1 through the third bearing 10. The input end of the second rotating shaft 9 is fixedly connected with the first gear 11, and the first gear 11 is a helical gear. The first gear 11 meshes with the helical teeth at the output end of the input shaft 4, and the output end of the second rotating shaft 9 is provided with helical teeth. The second rotating shaft 9 is rotatably connected to the intermediate box body 2 through the fourth bearing 12.
[0019] The spline shaft 13 is sleeved on the input shaft 4, and the spline shaft 13 is rotatably connected to the intermediate housing 2 through the fifth bearing 14 and the sixth bearing 15. The input end of the spline shaft 13 is fixedly connected with a second gear 17, and the second gear 17 is a helical gear. The second gear 17 is meshed with the helical teeth at the output end of the second rotating shaft 9. The input end of the spline shaft 13 is sleeved with a second shaft elastic ring 18, and the second shaft elastic ring 18 is located on the left side of the fifth bearing 14 and fits with the fifth bearing 14. The second shaft elastic ring 18 plays a role of positioning and stopping, which is convenient for the fifth shaft The installation of the fifth bearing 14 can also prevent the fifth bearing 14 from moving laterally. A spacer sleeve 19 is sleeved on the input end of the spline shaft 13. The spacer sleeve 19 can reduce the wear between the spline shaft 13 and the intermediate housing 2. A straight tooth is provided at the output end of the spline shaft 13. A spline sleeve 20 is sleeved on the output end of the spline shaft 13. A first wear-resistant sleeve 21 is sleeved on the spline sleeve 20. The spline sleeve 20 and the first wear-resistant sleeve 21 are located between the spline shaft 13 and the planetary carrier 25. The above two sleeves can reduce the wear between the spline shaft 13 and the planetary carrier 25.
[0020] The outer box body 3 is fixedly connected with three pins 23, the planetary gears 22 correspond to the pins 23 one by one, the planetary gears 22 are rotatably connected to the pins 23, the pins 23 are sleeved with a second wear-resistant sleeve 24, the second wear-resistant sleeve 24 can reduce the wear of the planetary gears 22, the spur teeth at the output end of the spline shaft 13 mesh with the planetary gears 22, the planetary gears 22 mesh with the planetary carrier 25, the output end of the planetary carrier 25 is rotatably connected to the outer box body 3 through the seventh bearing 26, and a first oil seal 27 is arranged between the outer box body 3 and the planetary carrier 25. It is arranged on the left side of the seventh bearing 26, and the planetary carrier 25 is provided with a sleeve 28 and an elastic retaining ring 29 for the first shaft. The elastic retaining ring 29 for the first shaft is arranged on the right side of the sleeve 28 and fits with the sleeve 28. The sleeve 28 is arranged on the right side of the seventh bearing 26, and the box cover 1 and the outer box body 3 are respectively fixedly connected to the two ends of the intermediate box body 2 by bolts. The above-mentioned first bearing 5, second bearing 8, third bearing 10, fifth bearing 14, sixth bearing 15 and seventh bearing 26 are all deep groove ball bearings, and the fourth bearing 12 is a cylindrical roller bearing.
[0021] During operation, the input motor drives the input shaft 4 to rotate, the input shaft 4 drives the first gear 11 to rotate, the first gear 11 drives the second shaft 9 to rotate, the second shaft 9 drives the second gear 17 to rotate, the second gear 17 drives the spline shaft 13 to rotate, the spline shaft 13 drives the planetary gear 22 to rotate, the planetary gear 22 drives the planetary carrier 25 to rotate, and the output end of the planetary carrier 25 is connected to an external device, wherein the first stage transmission is that the input shaft 4 drives the first gear 11 to rotate, the second stage transmission is that the second shaft 9 drives the second gear 13 to rotate, and the third stage transmission is that the spline shaft 13 drives the planetary gear 22 and the planetary gear 22 to rotate. The planet carrier 25 rotates, and the three-stage transmission increases the transmission torque. Moreover, both the first-stage transmission and the second-stage transmission adopt a transmission method in which helical teeth are meshed with helical gears, which can also increase the transmission torque. The transmission method in which helical teeth are meshed with helical gears also makes the transmission more stable and the operating noise is small. The first-stage transmission and the second-stage transmission adopt a transmission method in which gears are meshed with gear shafts, which greatly saves the space occupied by parts and makes the volume of the entire reducer smaller. The output end of the planet carrier 25 is provided with a spline, which is used to cooperate with a reel or other equipment to transmit power to the reel or other equipment.
[0022] The embodiments described above are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of the present invention.
Claims
1. A three-stage helical planetary gear reducer, comprising a case cover, an intermediate case body and an outer case body, characterized in that: The gear wheel is connected to the planetary gear of the gear box by a first bearing, and the gear wheel is connected to the planetary gear of the gear box by a second bearing. The two gears are helical gears, the second gear is meshed with the helical teeth at the output end of the second rotating shaft, and the output end of the spline shaft is provided with spur teeth; the input end of the spline shaft is sleeved with a spacing sleeve, and the output end of the spline shaft is sleeved with a spline sleeve, and the spline sleeve is sleeved with a first wear-resistant sleeve, and the first wear-resistant sleeve is located between the spline sleeve and the planetary carrier; a plurality of pins are fixedly connected to the outer box body, and the planetary gears correspond to the pins one by one, and the planetary gears are rotatably connected to the pins, and the pins are sleeved with a second wear-resistant sleeve, and the second wear-resistant sleeve is located between the pins and the planetary gears, and the spur teeth at the output end of the spline shaft are meshed with the planetary gears, and the planetary gears are meshed with the planetary carrier, and the output end of the planetary carrier is rotatably connected to the outer box body through the seventh bearing; the outer box body and the box cover are respectively fixedly connected to the two ends of the intermediate box body by bolts.
2. The three-stage helical planetary gear reducer according to claim 1, characterized in that: A first oil seal is arranged between the outer box body and the planetary carrier, and the first oil seal is located on the inner side of the seventh bearing. A second oil seal is arranged between the planetary carrier and the input shaft, and the second oil seal is located on the outer side of the first bearing. An elastic retaining ring for a first hole is arranged between the second oil seal and the first bearing, and the elastic retaining ring for the first hole is fitted with the first bearing.
3. The three-stage helical planetary gear reducer according to claim 1, characterized in that: The planetary frame is sleeved with a shaft sleeve, the shaft sleeve is located between the planetary frame and the outer box body, and the shaft sleeve is sleeved with a first shaft elastic retaining ring, which is fitted with the shaft sleeve.
4. The three-stage helical planetary gear reducer according to claim 1, characterized in that: A second shaft elastic retaining ring is sleeved on the input end of the spline shaft, and the second shaft elastic retaining ring is located inside the fifth bearing and fits with the fifth bearing.
5. The three-stage helical planetary gear reducer according to claim 1, characterized in that: The first bearing, the second bearing, the third bearing, the fifth bearing, the sixth bearing and the seventh bearing are all deep groove ball bearings, and the fourth bearing is a cylindrical roller bearing.
6. The three-stage helical planetary gear reducer according to claim 1, characterized in that: There are three planetary wheels and three pins.