CN211145241U - Cycloidal pin gear speed reducer with oil dynamic lubrication and cooling - Google Patents
Cycloidal pin gear speed reducer with oil dynamic lubrication and cooling Download PDFInfo
- Publication number
- CN211145241U CN211145241U CN201921588376.3U CN201921588376U CN211145241U CN 211145241 U CN211145241 U CN 211145241U CN 201921588376 U CN201921588376 U CN 201921588376U CN 211145241 U CN211145241 U CN 211145241U
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- oil
- pin
- gear
- sleeve
- cycloidal
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 26
- 238000005461 lubrication Methods 0.000 title claims abstract description 14
- 238000001816 cooling Methods 0.000 title claims description 7
- 230000009467 reduction Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 5
- 238000005096 rolling process Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 90
- 239000010687 lubricating oil Substances 0.000 description 18
- 230000001050 lubricating effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000004519 grease Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000425571 Trepanes Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses a fluid dynamic lubrication and refrigerated cycloid pinwheel reduction gear, include: both sides end cover and with axial drive: an input shaft and an output shaft; the cycloidal gear is sleeved on the input shaft through a bearing piece and is meshed with the needle gear sleeve; meanwhile, the cycloid wheel is linked with the output shaft through a pin; the pin gear sleeve is provided with a pin gear sleeve, and the pin sleeve is sleeved with a pin sleeve; the needle teeth and the pins are provided with oil guide holes leading from the axial end surface to the cylindrical surface; the end cover is provided with oil guide grooves which respectively correspond to the pin gear shaft end oil guide hole and the pin shaft end oil guide hole; the end cover is provided with an oil inlet for feeding oil into the oil guide groove; the outer shell of the needle tooth is provided with an oil drain hole. The cycloidal pin gear speed reducer changes friction between a cycloidal gear and a pin gear sleeve and friction between the cycloidal gear and a pin sleeve from sliding friction into rolling friction, pressure oil is filled between the pin gear, the pin gear sleeve, the pin and the pin sleeve to establish fluid dynamic lubrication, and the heat in the speed reducer is conducted to the outside of the speed reducer by the circulating lubrication oil.
Description
Technical Field
The utility model relates to a mechanical transmission structure field, especially a fluid dynamic lubrication and refrigerated cycloid pinwheel reduction gear.
Background
The cycloidal pin gear speed reducer is a novel transmission device which applies planetary transmission principle and adopts cycloidal pin gear engagement. All transmission devices of the cycloidal pin gear speed reducer can be divided into three parts: an input part, a deceleration part and an output part. The input shaft is equipped with a double eccentric sleeve which is dislocated by 180 deg., and on the eccentric sleeve two roller bearings called rotating arms are mounted, so that it can form H mechanism, and the central holes of two cycloidal gears are the roller paths of the bearings on the eccentric sleeve rotating arms, and the cycloidal gears are meshed with a group of annularly-arranged pin teeth on the pin gear so as to form an internal gearing speed-reducing mechanism whose tooth difference is one tooth, and in order to reduce friction, in the speed reducer whose speed ratio is small, the pin teeth are equipped with pin teeth sleeve.
The conventional lubricating mode of the cycloidal pin gear speed reducer is grease lubrication, and the grease has high viscosity and poor lubricating effect. If oil lubrication is used, the oil must be replaced periodically. Sliding friction is often generated between the cycloidal gear and the pin wheel and between the cycloidal gear and the pin, the friction coefficient is high, the loss is large, the temperature rise is obvious, the transmission efficiency of the cycloidal pin wheel speed reducer is low, and the cycloidal pin wheel speed reducer does not accord with the current large trend of energy conservation and emission reduction.
SUMMERY OF THE UTILITY MODEL
The technical scheme of the utility model is that: the utility model provides a lubricated and refrigerated cycloid pinwheel reduction gear of fluid dynamic, its structure mainly is based on: an input shaft and an output shaft.
The input shaft is sleeved with an eccentric sleeve, and the eccentric sleeve is fixed on the input shaft in a key connection mode and the like. The bearing piece is coaxially sleeved on the eccentric sleeve, the cycloid wheel is installed on the bearing piece, and an inner hole of the cycloid wheel is arranged as an outer ring of the bearing piece.
The cycloidal gear is meshed with the needle gear sleeve, the needle gear sleeve is sleeved on the rotating surface of the needle gear in a floating mode, and the shaft end of the needle gear is fixed on the output side end cover and the input side end cover.
The cycloidal gear is provided with a pin sleeve hole matched with the pin sleeve, the pin sleeve is sleeved on the pin in a floating mode, and the shaft end of the pin is fixed on the output shaft and the output support plate.
The needle teeth and the needle teeth sleeve are positioned in the needle teeth shell, and the needle teeth shell is connected with the input side end cover and the output side end cover. The input side end cover is supported on the input shaft through a first bearing, and an oil seal is arranged between the input side end cover and the input shaft. The output side end cap is supported on the output shaft through a second bearing, and an oil seal is also arranged between the output side end cap and the output shaft.
In order to solve the lubrication problem between the structure, further set up the oilhole on pin tooth and pin:
the needle gear is provided with an axial oil guide hole, the radial direction of the needle gear is provided with a radial oil guide through hole, and the axial oil guide hole is communicated with the radial oil guide hole and can guide lubricating oil at the shaft end into the space between the needle gear and the needle gear sleeve.
The pin is also provided with an axial oil guide hole, the pin is also provided with a radial oil guide through hole in the radial direction, and the axial oil guide hole is communicated with the radial oil guide through hole to guide lubricating oil at the shaft end into the space between the pin and the pin sleeve.
In order to ensure normal circulation of the lubricating oil, assembly gaps need to be arranged between the output side end cover and the output shaft and between the input side end cover and the output support plate, and oil pressure can be ensured to be established. Meanwhile, two oil guide grooves are formed in the output side end cover or the input side end cover, the axial oil guide hole in the end of the pin gear shaft corresponds to one oil guide groove, and the axial oil guide hole in the end of the pin shaft corresponds to the other oil guide groove. An oil inlet is respectively arranged on the output side end cover and the output side end cover corresponding to each oil guide groove, and an oil drain hole is arranged at the bottom of the needle gear sleeve.
Furthermore, an oil pump, a filter, an oil tank and a cooler are arranged outside the cycloidal pin gear reducer.
Lubricating oil of the oil tank is pumped into the oil inlet by the oil pump after passing through the filter, and flows back into the oil tank from the oil discharge hole after flowing in the cycloid pin gear speed reducer. Meanwhile, the cooler on the oil tank can cool the lubricating oil in the oil tank in time.
In order to ensure the oil pressure stability of lubricating oil, the oil tank is placed at a lower height than the cycloid pin gear speed reducer.
The utility model has the advantages that: the friction between the cycloid wheel, the pin gear sleeve, the cycloid wheel and the pin sleeve of the speed reducer structure is changed from sliding friction to rolling friction, pressure oil is filled between the pin gear, the pin gear sleeve, the pin and the pin sleeve, fluid dynamic lubrication is established, metal friction is avoided, friction loss is greatly reduced, system efficiency is improved, and temperature rise is reduced.
In addition, the lubricating oil entering the cycloidal pin gear speed reducer can also play a role in lubricating the cycloidal gear, so that the friction between the cycloidal gear and the pin sleeve and between the cycloidal gear and the pin sleeve is further reduced. Finally, the temperature rise caused by friction is brought out of the cycloidal pin gear speed reducer by the circulating lubricating oil, and the cycloidal pin gear is prevented from being worn by temperature rise.
Drawings
The invention will be further described with reference to the following drawings and examples:
FIG. 1 is an exploded view of the construction of a cycloidal pin gear reducer;
fig. 2 is a structural view of an output side end cap;
FIG. 3 is a block diagram of the needle teeth;
FIG. 4 is a block diagram of a pintle;
FIG. 5 is a state diagram of the lubrication between the teeth and the sleeve;
FIG. 6 is a diagram of the operating conditions of the cycloidal pin gear reducer and the external structure;
wherein: 1. an input shaft; 2. an eccentric sleeve; 3. connecting with a key; 4. a bearing member; 5. a cycloid wheel; 6. a needle gear sleeve; 7. needle teeth; 8. a pin gear housing; 9. a pin sleeve; 10. a pin; 11. an output shaft; 12. an output support plate; 13. an input side end cap; 14. an output side end cap; 15. a first oil seal; 16. a second oil seal; 17. an oil pump; 18. a filter; 19. an oil tank; 20. a cooler; 51. an inner hole of the cycloid wheel; 52. a pin trepan boring; 71. the needle gear axially guides the oil hole; 72. the needle teeth radially guide the oil hole; 101. the pin axially guides the oil hole; 102. the pin is provided with an oil guide through hole in the radial direction; 141. an oil inlet; 142. an oil guide groove; 81. an oil drain hole.
Detailed Description
Example 1:
as shown in the attached fig. 1-5, an eccentric sleeve 2 is coaxially sleeved on an input shaft 1, and the eccentric sleeve 2 is fixed on the input shaft 1 through a key connection 3. The bearing piece 4 is coaxially sleeved on the eccentric sleeve 2, the cycloid wheel 5 is installed on the bearing piece 4, and the inner hole 51 of the cycloid wheel is arranged as the outer ring of the bearing piece 4.
The cycloidal gear 5 is meshed with a needle gear sleeve 6, the needle gear sleeve 6 is sleeved on the rotary surface of the needle gear 7 in a floating mode, and the shaft end of the needle gear 7 is fixed on an output side end cover 14 and an input side end cover 13. The needle gear 7 and the needle gear sleeve 6 are positioned in the needle gear shell 8, and the needle gear shell 8 is connected with an input side end cover 13 and an output side end cover 14.
The cycloid wheel 5 is provided with a pin sleeve hole 52 matched with the pin sleeve 9, the pin sleeve 9 is in floating sleeve on the pin 10, and the shaft end of the pin 10 is fixed on the output shaft 11 and the output support plate 12.
The input-side end cover 13 is supported on the input shaft 1 via a first bearing with a first oil seal 15 provided therebetween. The output side end cap 14 is supported on the output shaft 11 via a second bearing, with a second oil seal 16 also provided therebetween.
The needle teeth 7 are provided with needle teeth axial oil guide holes 71, needle teeth radial oil guide through holes 72 are formed in the radial direction of the needle teeth 7, the needle teeth axial oil guide holes 71 are communicated with the needle teeth radial oil guide holes 72, and lubricating oil at the shaft ends of the needle teeth 7 can be guided between the needle teeth 7 and the needle teeth sleeve 6.
The pin 10 is also provided with a pin shaft oil guide hole 101, the pin 10 is also provided with a pin radial oil guide through hole 102 in the radial direction, the pin shaft oil guide hole 101 is communicated with the pin radial oil guide through hole 102, and lubricating oil at the shaft end of the pin 10 can be guided between the pin 10 and the pin sleeve 9.
In order to ensure normal circulation of the lubricating oil, it is ensured that oil pressure can be established between the output side end cap 14 and the output shaft 11. Meanwhile, two oil guide grooves 142 are formed in the output side end cover 14 or the input side end cover 13, the pin gear axial oil guide hole 71 at the shaft end of the pin gear 7 corresponds to one oil guide groove, and the pin shaft axial oil guide hole 101 at the shaft end of the pin 10 corresponds to the other oil guide groove. An oil inlet 141 is provided on each of the input side end cover 13 and the output side end cover 14 corresponding to each oil guide groove, and an oil drain hole 81 is provided at the bottom of the needle gear sleeve 8.
Example 2:
as shown in fig. 6, an oil pump 17, a filter 18, an oil tank 19, and a cooler 20 are provided in addition to the cycloidal pin gear reducer. One end of the oil pump 17 is communicated to the oil inlet 141, and the other end of the oil pump 17 passes through the filter 18 and is communicated to the oil tank 19.
The lubricating oil in the oil tank 19 passes through the filter 20 and is then pumped into the oil inlet 141 by the oil pump 17, and the lubricating oil flows back into the oil tank 19 from the oil drain hole 81 after passing through the flow in the cycloid pin gear reducer. Meanwhile, the cooler 20 on the oil tank 19 can cool the lubricating oil in the oil tank 19 in time.
In order to ensure the oil pressure stability of lubricating oil, the oil tank is placed at a lower height than the cycloid pin gear speed reducer.
Example 3:
when the input shaft 1 has input, the input shaft 1 drives the eccentric sleeve 2 to rotate, the cycloidal gear 5 and the eccentric sleeve 2 rotate together, in the rotating process of the cycloidal gear 5, the tooth surface of the cycloidal gear 5 is meshed with the pin gear sleeve 8, so that the pin gear sleeve 8 rotates around the pin gear 7, meanwhile, the pin sleeve hole 52 on the cycloidal gear 5 drives the pin sleeve 9 to rotate around the pin 10, the pin sleeve 9 revolves around the axis of the output shaft 11, and the pin 10 drives the output shaft 11 to output.
When the input shaft 1 rotates, the oil pump 17 works to pump lubricating and cooling oil with a certain temperature and flow rate into the cycloidal pin gear reducer through the oil inlet 141 on the output side end cover 14, and the lubricating and cooling oil respectively enters the axial oil guide holes of the pin teeth 7 and the axial oil guide holes of the pin 10 through the oil guide grooves 142 and then enters the radial oil guide through holes of the pin teeth 7 and the radial oil guide through holes of the pin 10. Between the needle teeth 7 and the needle teeth sleeve 6; an assembly gap is designed between the pin 10 and the pin sleeve 9, and after lubricating oil enters the gap, the gap between the pin teeth 7 and the pin teeth sleeve 6 and the gap between the pin 10 and the pin sleeve 9 are filled, and the pin teeth 7 and the pin teeth sleeve 6 are enabled; the pin 10 and the pin sleeve 9 are separated, namely the pin sleeve 6 rotates around the pin teeth 7, and the pin sleeve 9 does not have metal friction when rotating around the pin 11, so that the friction loss is greatly reduced.
Lubricating oil enters the cycloidal pin gear speed reducer from openings at two ends of the pin gear sleeve 6 and the pin sleeve 9, and can also lubricate the cycloidal gear, the pin gear sleeve 6, the cycloidal gear 5 and the pin 10, so that the friction loss is further reduced. Finally, the lubricating oil inside the cycloid wheel is collected in the oil drain hole 81 at the bottom of the pin gear case, returned to the oil tank 17, and cooled by the cooler 20.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical concepts of the present invention be covered by the claims of the present invention.
Claims (8)
1. A cycloidal pin gear speed reducer with oil dynamic lubrication and cooling, comprising: end covers on two sides and coaxial transmission: an input shaft and an output shaft; the cycloidal gear is sleeved on the input shaft through a bearing piece and is meshed with the needle gear sleeve; meanwhile, the cycloid wheel is linked with the output shaft through a pin; the method is characterized in that: a pin gear sleeve is sleeved outside the rotary surface of the pin gear, and a pin sleeve is sleeved outside the cylindrical surface of the pin; the needle teeth and the pins are provided with oil guide holes leading from the axial end face to the rotary surface; the end cover is provided with oil guide grooves which respectively correspond to the pin gear shaft end oil guide hole and the pin shaft end oil guide hole; the end cover is provided with an oil inlet for feeding oil into the oil guide groove; an oil drain hole is formed in the shell of the needle gear.
2. The gerotor pinwheel reduction gear of claim 1, in which the oil is dynamically lubricated and cooled, and further comprising: the input shaft is sleeved with the eccentric sleeve in a key connection mode; the eccentric sleeve is sleeved with the cycloidal gear through a bearing piece.
3. The gerotor pinwheel reduction gear of claim 2, in which the oil is lubricated and cooled hydrodynamically, the gerotor pinwheel reduction gear further comprising: the cycloid wheel comprises an axial inner hole; the inner hole is used as an outer ring of the bearing piece.
4. The gerotor reduction gear set for hydrodynamic lubrication and cooling of claim 2 or 3, characterized in that: the output shaft is supported on the input shaft through a first bearing, and the output support plate is fixed on the input shaft through a second bearing.
5. The gerotor pinwheel reduction gear of claim 4, in which the oil is lubricated and cooled hydrodynamically, the gerotor pinwheel reduction gear further comprising: and oil seals are arranged on the end covers.
6. The gerotor reduction gear set for hydrodynamic lubrication and cooling of claim 1 or 5, characterized in that: an oil pump is connected to the oil inlet, the oil pump is connected to the oil tank, and a filter is arranged between the oil pump and the oil tank; the oil drain hole is communicated to the oil tank.
7. The gerotor pinwheel reduction gear of claim 6, in which the oil is lubricated and cooled hydrodynamically, the gerotor pinwheel reduction gear further comprising: the height of the oil tank is lower than that of the cycloidal pin gear speed reducer.
8. The gerotor pinwheel reduction gear of claim 7, in which the oil is dynamically lubricated and cooled, and further comprising: and the oil tank is also provided with a cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921588376.3U CN211145241U (en) | 2019-09-23 | 2019-09-23 | Cycloidal pin gear speed reducer with oil dynamic lubrication and cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921588376.3U CN211145241U (en) | 2019-09-23 | 2019-09-23 | Cycloidal pin gear speed reducer with oil dynamic lubrication and cooling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211145241U true CN211145241U (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921588376.3U Active CN211145241U (en) | 2019-09-23 | 2019-09-23 | Cycloidal pin gear speed reducer with oil dynamic lubrication and cooling |
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| CN (1) | CN211145241U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594366A (en) * | 2019-09-23 | 2019-12-20 | 清华大学苏州汽车研究院（吴江） | Cycloidal pin gear speed reducer with oil dynamic lubrication and cooling |
| WO2023188071A1 (en) * | 2022-03-30 | 2023-10-05 | 株式会社Nittan | Speed reducer |
-
2019
- 2019-09-23 CN CN201921588376.3U patent/CN211145241U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594366A (en) * | 2019-09-23 | 2019-12-20 | 清华大学苏州汽车研究院（吴江） | Cycloidal pin gear speed reducer with oil dynamic lubrication and cooling |
| WO2023188071A1 (en) * | 2022-03-30 | 2023-10-05 | 株式会社Nittan | Speed reducer |
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