CN2149497Y

CN2149497Y - Mini Cycloidal electric oil pump

Info

Publication number: CN2149497Y
Application number: CN 92238386
Authority: CN
Inventors: 郑晓东
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-10-06
Filing date: 1992-10-06
Publication date: 1993-12-15
Anticipated expiration: 2002-10-06

Abstract

The utility model relates to a mini swing wire electric oil pump which is suitable for lubricating machinery. The mini swing wire electric oil pump which is suitable for lubricating machinery is composed of an inner rotor (7), an outer rotor (4), an oil suction slot (12), an oil discharge slot (8), an oil inlet pipe (2), an oil outlet pipe (9), a motor end cover (11), i.e.a pump body), a mini motor (14), etc. The mini swing wire electric oil pump which is suitable for lubricating machinery is characterized in that the mini swing wire electric oil pump which is suitable for lubricating machinery is arranged inside the motor end cover, the inner rotor (7) of a swing wire is directly fixed on a motor shaft (5), and the outer rotor (4) of a circular arc tooth profile is arranged inside the pump body hole of the motor end cover. The oil suction slot (12) in a crescent shape, and the oil discharge slot (8) are processed on the motor end cover, i.e. the pump body. The oil suction slot (12) in the crescent shape and the oil discharge slot (8) are respectively communicated with the oil inlet pipe (2) and the oil outlet pipe (9). A pump foot (1) with the oil inlet pipe is connected with the motor end cover by a bolt, and is fixed on the outer shell of a main machine.

Description

Mini Cycloidal electric oil pump

The miniature cycloid electric oil pump of the utility model is a kind of mechanical lubrication oil pump, is specially adapted to cycloidal planetary gear speed reducer.

China is at mechanically widely used miniature external gear type oil pumps such as cycloidal planetary gear speed reducers at present, and two problems of ubiquity: (one) oil pump and motor are divided into disome, when assembling, often exists coaxiality error; (2) the involute gear workmanship is relatively poor, thereby the miniature external gear type oil pump vibration and noise of existing production is big, and the life-span is short.

At above-mentioned two shortcomings, the utility model purpose provides a kind of compact structure, and vibration and noise is little, the miniature cycloid electric oil pump that the life-span is long.

For achieving the above object, the utility model carries out the improvement of two aspects; Adopting oil pump and motor is one and cycloid rotor structure, it is characterized in that: Swing line oil pump is contained in the electric motor end cap, oil pump and motor are integrated, blance line inner-rotor 7 directly is fastened on the motor shaft 5, circular arc profile external rotor 4 is placed in the pump housing hole of electric motor end cap 11, make the oil pump structure compactness, meniscate oil-feed tank 12 and oil-discharge trough 8 are gone up and be processed with to electric motor end cap (being the pump housing), they communicate with oil outlet tube 9 with oil inlet pipe 2 respectively, for preventing oil leakage, oil sealing 10 is housed on the electric motor end cap, and the pump pin 1 usefulness bolt that has oil inlet pipe is connected with end cap, and is fixed on the shell of main frame.

The advantage of the miniature Swing line oil pump of the utility model is as follows: because of adopting the pump integrative-structure, eliminated coaxiality error; Cycloid rotor has compact structure, and volume is little, and running is steady, and vibration noise is little, the characteristics that the life-span is long.

Fig. 1 is the utility model sectional drawing.Among the figure: 1, pump pin; 2, oil inlet pipe; 3, pump cover; 4, external rotor; 5, motor shaft; 6, flat key; 7, internal rotor; 8, oil-discharge trough; 9, oil outlet tube; 10, oil sealing, 11, electric motor end cap (pump housing); 12, oil suction groove; 13, bearing; 14, micromachine.

Below in conjunction with Fig. 1 the utility model working procedure is further described:

The Swing line oil pump critical piece is made up of internal rotor 7 and external rotor 4, and two rotor engaged have a fixing eccentric distance e, and internal rotor 7 flank profils are equidistant short spoke epicycloid, and its number of teeth is Z ₁, external rotor 4 is the internal gear of a garden curved tooth exterior feature, the number of teeth is Z ₂, and Z ₂=Z ₁+ 1.Internal rotor is by motor shaft 5 direct driven rotary, and external rotor in engagement process, forms Z in company with rotation in the same way ₂Individual fluid chamber, along with inner and outer rotors engagement rotation, each fluid chamber volume constantly changes, when fluid chamber changes from small to big, produce parital vacuum, fluid is sucked by oil inlet pipe 2, oil suction groove 12, when solution cavity from large to small the time, fluid is just discharged from oil-discharge trough 8 and oil outlet tube 9.

Claims

A kind ofly be suitable for the miniature cycloid electric oil pump that mechanical lubrication is used, oil pump is contained in the electric motor end cap, and oil pump and motor are integrated.Drive the rotation of circular arc profile external rotor by blance line inner-rotor, both mesh and form a plurality of fluid chambers, along with the fluid chamber volume size changes, finish oil suction and oil extraction work.

It is little to the utlity model has the compact structure volume, running steadily, noise is low, the advantage that life-span is long, be specially adapted to the lubricated of cycloidal planetary gear speed reducer, it is poor to have overcome former disome formula external gear type oil pump coaxality, the shortcoming that vibration noise is big, the life-span is short, be a kind of new product of upgrading, be suitable for midget plant and produce.