CN1028423C

CN1028423C - Electric differential deceleration hoister

Info

Publication number: CN1028423C
Application number: CN 91103848
Authority: CN
Inventors: 石行
Original assignee: Xicheng Xinkai General Testing Factory Beijing City
Current assignee: Xicheng Xinkai General Testing Factory Beijing City
Priority date: 1991-06-17
Filing date: 1991-06-17
Publication date: 1995-05-17
Anticipated expiration: 2006-06-17
Also published as: CN1067864A

Abstract

The present invention relates to an electric hoister with differential speed reduction, which is suitable to be used as winches of lifters for various cranes, traveling cranes, mines and building sites. The present invention is provided with an output wheel drum, an output gear ring, a fixing gear ring, a planet gear, an input gear, a motor stator, a rotor and a supporting core shaft. The present invention is characterized in that the number of teeth of the output gear ring and the fixing gear ring differs by one tooth, the rotor is fixedly connected to the supporting bearing core shaft with immobility, and the input gear is driven by the stator to rotate. Furthermore, a differential mechanism is composed of the output gear ring, the fixing gear ring and the planet gear, so a high reduction ratio is obtained. Meanwhile, a stator rotating motor which is composed of the stator, the rotor and the supporting bearing core shaft is put into a speed reducer so as to make the structure of the hoister compact.

Description

Electric differential deceleration hoister

A kind of differential reducing electric winch, it belongs to handling machinery, is applicable to various cranes, driving winch etc., also is suitable for doing the elevator winch of mine, building ground.

Present various weight-lifting equipments, driving and mine, the elevator winch of building ground, all by the folding and unfolding hawser realize promoting, descending motion.And the folding and unfolding hawser is to use electrical motor to do propulsion source, slows down by retarder, drives hawser folding and unfolding wheel and rotates and realize.Because the moment of torsion that the folding and unfolding hawser requires is big, speed is slow, therefore needs with large speed ratio, high-performance retarder, and the volume of retarder is very huge.In addition, electrical motor and retarder separate, and connect by drive coupling or belt, and this also needs to take many spaces.

The objective of the invention is to invent a kind of differential reducing electric winch, its electrical motor and retarder are integrated, and big deceleration speed ratio and output torque are arranged, and compact conformation is easy for installation.

The present invention as shown in Figure 1.It has output wheel hub 1, output gear 2, fixed gear ring 3, planetary wheel 4, input gear 5, planetary wheel retainer 6, retainer fixed block 7, motor stator 8, rotor 9, supporting mandrel 10, it is characterized in that: stator 8 is affixed with input gear 5, and the son 9 that can rotate rotates, and rotor is fixed on the supporting mandrel 10, and planetary wheel 4 is made of two face of gears up and down, output gear 2 is fixed on the output wheel hub 1, two face of gears of planetary wheel 4 mesh with fixed gear ring 3 and output gear 2 respectively, one of them face of gear of planetary wheel 4 and input gear 5 engagements, and fixed gear ring 3 is affixed with supporting mandrel 10, fixed gear ring 3 has Z1 tooth, output gear 2 has Z2 tooth, and Z1 and Z2 differ from 1 tooth, and planetary wheel 4 has two or more.

Accompanying drawing 1 is a cross-sectional view of the present invention.

Accompanying drawing 2 uses the embodiment cross-sectional view of two ends retainer for the present invention.

Principle of work of the present invention is as follows: stator 8, rotor 9 and supporting mandrel 10 have formed a no shell electrical motor, and this electrical motor is the same with the principle of work of common motor, and just rotor 9 is motionless relatively, by stator 8 output driving torques.Stator 8 drives input gear 5 and rotates.Input gear 5 owing to fixed gear ring 3 maintains static, thereby makes planetary wheel 4 both self rotate, also revolution in fixed gear ring 3 when rotating.Because the number of teeth of permanent tooth circle 3 is Z1, the number of teeth of output gear 2 is Z2, and both differ 1 tooth, thereby when planetary wheel 4 public affairs circle, output gear 2 and fixed gear ring 3 relative differential 1 teeth.Affixed because of fixed gear ring 3 again with supporting mandrel 10, so driving output wheel hub 1, output gear 2 rotated 1 tooth.

Speed ratio relation of the present invention is calculated as follows

The number of teeth of supposing planetary wheel 4 is Z3, and the number of teeth of input gear 5 is Z4, and the rotating speed of input gear 5 is n4, and the revolution rotating speed of planetary wheel 4 is n3, and the rotating speed of output gear 2 is n2, and following relational expression is arranged:

n3＝n4＊Z4/（Z4+Z2）

Concern by Z1 and Z2 differential:

n2＝n3/Z2

So have:

n2＝n4＊Z4/Z2＊（Z4+Z2）

In the ordinary course of things, can design and make Z2=100, thus make reduction ratio also greater than 100(because Z4+Z2＞Z4, so reduction ratio＞Z2).

The present invention has used differential principle, when planetary wheel revolves round the sun, because of fixed gear ring 3 and output gear 2 differ from 1 tooth, so after every public affairs circle, will turn over the angle of 1 tooth relatively between the two.Simultaneously do not use the flexible tooth technology at work, all adopt rigid gear, very high intensity is arranged.When transmission, therefore the revolution of planetary wheel 4 does not exist the low problem of satellite gear driving efficiency just as middle transition yet.Be placed in the middle of the retarder as the electrical motor of propulsion source, simplified the connection between them, and dwindled the axial dimension of whole winch greatly, this makes compact conformation of the present invention, and mechanism is simple.For increasing transmitted power, can use three, four or more satellite gear.

Among the present invention, the electric motor structure that rotor 9 and stator 8 are formed can be common squirrel cage asynchronous motor structure, is bumped into the induction bus in stator, is bumped into coil winding in rotor 9, and by supporting mandrel's 10 power supplies.Also can be the coiling exciting motor structure, all be bumped into coil winding in rotor 9 and stator 8, the coil power supply in the stator 8 contacts power supply by the distributor track of supporting mandrel 10 and 8 of stators.Can also be dc motor structure, as long as conversely with the effect of former stator and rotor.

Among the present invention, output gear 2 tooth number Z 2 can be than fixed gear ring 3 tooth number Z more than 11 teeth or few 1 tooth.When few 1 tooth, the input hand of rotation is identical with outbound course, and during many 1 teeth, it is opposite with outbound course to import hand of rotation.Because the number of teeth of output gear 2 and fixed gear ring 3 is unequal, both same axle mountings all have identical width between centers for keeping both with planetary wheel 4, can use the profile shifting gear technology.Can allow dedendum flank and all displacements of input gear 5 on output gear 2, fixed gear ring 3, the planetary wheel 4, like this, the modification coefficient of each gear is all little, to keep the stationarity of motion.The width between centers correction is carried out in the flank of tooth displacement that also can be only output gear 2 and planetary wheel 4 be engaged with, and makes processing and easy to assembly.Keep width between centers between output gear 2 and the planetary wheel 4 and the defeated circle 3 of fixed teeth to equate that with width between centers between the planetary wheel 4 method that also can adopt oblique gear spiral angle to vary in size is adjusted, mating teeth face use helical wheel with it on output gear 2 and the planetary wheel 4.The adjustment of width between centers can also be adjusted with the method for non-standard modulus.

Planetary wheel retainer 6 uses retainer fixed block 7 to make two-layer up and down fixing among the present invention, can use fastener such as screw, bolt etc., also can rivet.Require fixation, two retainer sheets can not relatively rotate phenomenon up and down.Among the present invention, all bearings, bearing and planetary wheel 4 bearings as 3 of stator 8 bearings, output wheel hub 1 bearing, output gear 2 and fixed gear rings can use antifriction-bearing box or plain bearing.Grease lubrication can be used, also oil lubrication can be acted on.Between retainer 6 and supporting mandrel 10, can add radial journal bearing, to keep certain axial location of planetary wheel 4, particularly when the helical wheel transmission, in order to bear the axial force of planetary wheel 4.Between fixed gear ring 3 and output gear 2, adopt the cantilever design shown in the accompanying drawing 1, can be connected by housing between supporting mandrel 10 and the fixed gear ring 3, bigger Joint strenght and rigidity should be arranged.Bearing between fixed gear ring 3 and the output gear 2 can be used plain bearing, also can be antifriction-bearing box or other bearing, to reduce radial dimension for well.

The present invention solves the cantilever design of planetary wheel 4 for increasing the rigidity of planetary wheel 4, can adopt the form as accompanying drawing 2, and planetary wheel retainer 6 is supported on the two ends of planetary wheel 4.

Claims

1, a kind of differential reducing electric winch, it has output wheel hub 1, output gear 2, fixed gear ring 3, planetary wheel 4, input gear 5, planetary wheel retainer 6, retainer fixed block 7, motor stator 8, rotor 9, supporting mandrel 10, it is characterized in that: stator 8 is affixed with input gear 5, and the son 9 that can rotate rotates, and rotor is fixed on the supporting mandrel 10, and planetary wheel 4 is made of two face of gears up and down, output gear 2 is fixed on the output wheel hub 1, and two face of gears of planetary wheel 4 mesh with fixed gear ring 3 and output gear 2 respectively; One of them face of gear of planetary wheel 4 and input gear 5 engagements, fixed gear ring 3 is affixed with supporting mandrel 10, and fixed gear ring 3 has Z1 tooth, and output gear 2 has Z2 tooth, and Z1 and Z2 differ from 1 tooth, and planetary wheel 4 has two or more.