CN2042911U - Pin-cycloidal/cast-cycloidal speed-reducing machine - Google Patents

Abstract

The utility model discloses a novel pin-cycloidal speed-reducing machine which is a cycloidal gear cast by nodular cast iron. The pin-cycloidal speed-reducing machine replaces the bearing cycloidal gear used in the past. The utility model has the advantages of low cost, simple manufacturing process, reasonable structure, cheapness, small noise and lower temperature rising.

Description

Pin-cycloidal/cast-cycloidal speed-reducing machine

The utility model relates to a kind of cycloidal planetary gear speed reducer made from new material (abbreviating pin pendulum speed reducer as).More particularly, it is that a kind of cylinder iron material replaces steel, and a kind of novel pin pendulum speed reducer of making, i.e. casting pendulum speed reducer.

As everyone knows, along with development and national economy, pin pendulum speed reducer has been widely used in the equipment of departments such as national defence, light industry, chemical industry, metallurgy.But, present pin pendulum speed reducer, its cycloid wheel material all is to adopt to roll chromium Bearing Steel GCr15, and following deficiency is arranged like this: the one, the cost of Bearing Steel is higher; The 2nd, manufacture process requirement is complicated; The 3rd, the working stress of cycloid wheel only is about 50%～60% of allowable stress usually, and material is good excessively, causes waste (tooth is taken out in big speed ratio i 〉=35 person except).In addition, existing pin pendulum speed reducer, its some dimensional parameters is also unreasonable.

The purpose of this utility model provides a kind of pin pendulum speed reducer that cost is low, manufacturing process simple, the rational cast iron cycloid wheel of structure is made that has.

The utility model is to realize like this, in this novel pin pendulum speed reducer, its cycloid wheel material replaces the GCr15 Bearing Steel with spheroidal graphite cast iron, the cost of cast iron is lower than GCr15 Bearing Steel cost, if when producing in enormous quantities, adopt die cast, the gross weight of material can reduce, and the overall cost of material also can reduce.Simultaneously, the heat treatment process of cast iron cycloid wheel is simple and reliable, according to the size of its transferring power, selects different heat treatment modes as modified, nitriding treatment etc., the embrittlement that can avoid the steel cycloid wheel to cause because of high frequency hardening like this can make heat treated expense reduce again.In the structure of casting pendulum speed reducer, as not increasing the total volume of casting pendulum speed reducer, adopt the method that suitably thickens the facewidth, can reduce contact stress, the rotary arm bearing size is strengthened, prolong the rotary arm bearing life-span.Check through related detection unit is measured, and cylinder iron cycloid wheel replaces the efficient of the made speed reducer of steel cycloid wheel, is not less than the efficient with the speed reducer of steel cycloid wheel manufacturing, simultaneously, can also reach the standard-required of pin pendulum speed reducer efficient.

By the calculating to contact strength of tooth surface, cylinder iron cycloid wheel is made speed reducer, the contact stress σ of its flank of tooth _jLess than its allowable stress ［ σ _j.By complete machine is carried out life test, under the constant situation of other component, pin pendulum speed reducer is become " casting is put " by " steel pendulum ", and its life-span is reliable.Therefore, it is more more reasonable than using the GCr15 steel to use spheroidal graphite cast iron.

The speed reducer that utilizes the cast iron cycloid wheel to make, the cost of material is low, and the manufacturing process of cast iron cycloid wheel is also simple, cheap, and noise is little simultaneously, and temperature rise is lower.Structure is comparatively reasonable after improving, and can make the weak link of speed reducer---and the rotary arm bearing life-span prolongs.

Below in conjunction with accompanying drawing the utility model is described:

Fig. 1 is the principal section figure of casting pendulum speed reducer.

Fig. 2 is A---the A sectional drawing of casting pendulum speed reducer.

Among Fig. 1, input shaft 1, two eccentric bushings 2, rotary arm bearing 3, cast iron cycloid wheel 4, gear pin 5, pin gear sleeve 6, pin 7, roller 8, pin wheel housing 9, output shaft 10.

When motor drives pivoted arm (comprising input shaft 1 and two eccentric bushing 2) rotation, two identical, by rotary arm bearing 3, be contained in each other cast iron cycloid wheel 4 on 180 ° two eccentric bushings 2 as planet wheel, by with fixing central gear, be the pinwheel engagement of (comprising pin wheel housing 9, gear pin 5, pin gear sleeve 6), will revolve round the sun around axis rotation own with around the pivoted arm axis.By pin output mechanism (comprising pin 7, roller 8, output shaft 10) rotation of cycloid wheel is transferred out, thereby reach the purpose of deceleration, reduction speed ratio equals the number of teeth of cycloid wheel.

The utility model cylinder iron cycloid wheel 4 has replaced in the past general steel cycloid wheel, and in casting pendulum speed reducer, reservation rotary arm bearing 3 outer rings more help the facewidth and thicken.

Claims (3)

1, a kind of by input shaft 1, two eccentric bushings 2, rotary arm bearing 3, cast iron cycloid wheel 4, gear pin 5, pin gear sleeve 6, pin 7, roller 8, pin wheel housing 9, the cycloidal planetary gear speed reducer that output shaft 10 is made is characterized in that having the cycloid wheel of spheroidal graphite cast iron.

2, cycloidal planetary gear speed reducer according to claim 1, the cycloid wheel of its spheroidal graphite cast iron can be used quenching with Subsequent tempering.

3, cycloidal planetary gear speed reducer according to claim 1, the cycloid wheel of its spheroidal graphite cast iron can be used nitriding treatment.

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