阅读说明：本技术 一种油液动润滑及冷却的摆线针轮减速器 (Cycloidal pin gear speed reducer with oil dynamic lubrication and cooling ) 是由 陈龙生 朱江 周芳誉 于 2019-09-23 设计创作，主要内容包括：本发明公开了一种油液动润滑及冷却的摆线针轮减速器,包括：两侧端盖、以及同轴向传动的：输入轴和输出轴；摆线轮通过轴承件套装于输入轴上,摆线轮与针齿套啮合；同时摆线轮通过柱销与所述输出轴连动；针齿套装有针齿套,柱销套装柱销套；针齿及柱销上均开设有从轴端面通往圆柱面导油孔；在端盖上开设有分别对应针齿轴端导油孔和柱销轴端导油孔的导油槽；端盖上开设有用于导油槽进油的进油口；针齿的外壳上则开设有放油孔。该摆线针轮减速器将摆线轮与针齿套、摆线轮与柱销套之间的摩擦由滑动摩擦变为滚动摩擦,针齿、针齿套和柱销、柱销套之间为压力油,建立起流体动润滑,循环的润滑油液把减速器内部的热量传导到减速器外部。(The invention discloses a cycloidal pin gear speed reducer with oil dynamic lubrication and cooling, comprising: 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.)

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 5, 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.

Technical Field

The invention relates to the field of mechanical transmission structures, in particular to an oil-hydraulic lubricating and cooling cycloidal pin gear speed reducer.

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.

Disclosure of Invention

The technical scheme of the invention is as follows: 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 invention 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 is further described with reference to the following figures 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 the 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