CN104295721A

CN104295721A - Planet differential speed reducer of zinc base alloy bearing supporting output shaft

Info

Publication number: CN104295721A
Application number: CN201410396358.0A
Authority: CN
Inventors: 吴声震
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-08-06
Filing date: 2014-08-06
Publication date: 2015-01-21

Abstract

The invention discloses a planet differential speed reducer of a zinc base alloy bearing supporting output shaft. The planet differential speed reducer comprises a box body, a transmission part and an output shaft, and is characterized in that the input end of the box body is connected with a bearing supporting input shaft for a circular end cover inner hole; the transmission part comprises differential parts and quasi planetary parts, wherein the differential parts include a sun wheel, a planet wheel, a star axle, a first inner gear ring and a planet carrier, and the quasi planetary parts include a quasi sun wheel, a quasi planet wheel, a quasi star axle, a second inner gear ring and a quasi planet carrier, and the second inner gear ring is connected with an output shaft circular disc; a column-disc-shaped polyester oil absorption sponge with the T-shaped section is arranged in the output shaft, the column part of the column-disc-shaped polyester oil absorption sponge is arranged in a shaft hole, the disc part of the column-disc-shaped polyester oil absorption sponge is arranged in an output shaft disc inner hole and communicated with radial holes evenly distributed in the circumference of the disc, and oil absorption sponges are arranged in the evenly-distributed radial holes. The planet differential speed reducer has the technical advantages that the price of the alloy bearing is reduced by 60% to 80%; work is stable, no noise is produced, the radial size is small, and the impact resistance and bearing force are large; the service life is long; the structure is simple, and detaching and assembling are convenient; the good shock absorption performance is achieved; bearing steel can be saved.

Description

The planet differential speed reducer of zinc base alloy bearing supporting output shaft

[technical field]

The present invention relates to the improvement of 2K-H negative mechanisms in universal planetary technical field (NGW type) planet technology, be specifically related to the improvement of planetary differential reduction device output shaft block bearing, a kind of planet differential speed reducer of zinc base alloy bearing supporting output shaft.

[background technique]

Universal planetary transmission comprises 2K-H negative mechanisms (NGW type) and the large class of K-V-H mechanism (N-type) two, and K-V-H mechanism (N-type) comprises cycloid and involute.The output shaft of existing universal planetary transmission all adopts rolling bearing to support, and comparatively sliding bearing is high a lot of for the price of rolling bearing, especially high-power, high pulling torque type.

Research finds, universal planetary transmission output shaft can adopt sliding supported condition, as long as ensure that there is enough, clean lubricant oil in sliding supported condition face, this is that " bearing due to (planetary reducer) output shaft does not bear radial working load (only bearing the deadweight of output planetary rack device), and thus bearing size is only determined by structural requirement." (" design and manufaction of Planetary Involute Gear " chapter 12 calculated examples)

Output shaft is if use sliding supported condition instead, and its Advantageous Effects is that bearing price can save 60-80%:

Through looking into, what above-mentioned calculated example was selected is the light ball bearing 9707/780 of single-row spy, and two bearings amounts to heavy 624kg, valency 44450 yuan.As changed casting Zine containing alloy sliding bearing into, weight about can alleviate 500kg, save nearly 40,000 yuan.

The advantage of casting Zine containing alloy sliding bearing is:

1, good casting property, foundry goods is fine and close, and the little heat conductivity of friction factor is higher, and finish turning surface roughness can reach 1.6;

2, weight ratio copper is light by 40%, and cost is lower than tin bronze by more than 40%;

3, working life is tin bronze 2 ~ 3 times, has self-lubricating property and shock-absorbing function, is applicable to middle low-speed heave-load occasion;

4, have nonmagnetic, no-spark performance, in inflammable and explosive dangerous situation safety.

[summary of the invention]

Aeroplane engine main bearing can adopt sliding bearing, speed reducer be assorted petty can not?

The object of the invention is, the rolling bearing providing zinc base alloy bearing to replace existing planetary differential reduction device output shaft to adopt, a kind of planet differential speed reducer of zinc base alloy bearing supporting output shaft.

The theoretical foundation that sliding bearing can replace rolling bearing is as follows:

" plain bearing structure is simple, easily manufactured, bearing capacity large, but high stability is poor, easy bad student's oil whip." (Wang Wenbin " mechanical design handbook " rolls up 3.21-4 page)

" in normal state, sliding bearing abrasion rate is very low, and the swarf particles of formation is small-sized, and quantity is also few." (Bu Yan " practical bearing technology handbook " 492 pages)

" aeroplane engine main bearing adopts general sliding bearing; parameter: specific pressure allowable [p]=12-22 (MPa); linear velocity allowable [v]=8-10 (m/s), [pv] allowable value≤80 (MPa) (m/s)." (Bu Yan " practical bearing technology handbook " 349 pages)

" casting Zine containing alloy be applicable in, low speed (≤7-10m/s), heavy duty (25-30MPa), the bearing that works under (allowable contact stress σ=550MPa) condition." (6 pages, Cheng great Xian " mechanical design handbook " bearing)

The key of technical solution of the present invention is: ensure that there are enough clear gusolines in zinc base alloy sliding supported condition face." outer fork-like farm tool used in ancient China particle totally, is not had to be the major reason that sliding bearing lost efficacy." (" mechanical design handbook " rolls up 4.27-227 page)

Described casing input end face connects nose circle lid, and described nose circle lid input end endoporus bearing supports input shaft;

Further, described transmission part comprises differential component and quasi-planet parts, described differential component comprises the sun gear be located on input shaft, planet wheel, spider gear shaft, first ring gear and planet carrier, described quasi-planet parts comprise accurate sun gear, there won't be any problem star-wheel, foresight wheel shaft, second ring gear and there won't be any problem carrier, described planet carrier internal spline connects with accurate sun gear external splines, described accurate sun gear together with planet carrier empty set on input shaft, described there won't be any problem carrier is fastened on nose circle and covers, described first, two ring gears are the two adjacent ring gears in ring gear, the two ring gear numbers of teeth, modulus is equal, described ring gear is connected with output shaft disk,

Again further, " cylinder-disc type " polyester oil suction sponge of " T " word section is provided with in described output shaft, cylindrical end and output shaft axis hole form a shoe cream room Q, described shoe cream room Q lubricant oil flows into alloy bearing and wear-resisting ring gap from output shaft aperture, and disk end is located at radial hole uniform with disc circumference on output shaft disk end face and communicates;

The described ring endoporus that all carries connects zinc base alloy bearing, and described zinc base alloy bearing is bearing on wear-resisting ring, and described wear-resisting ring is located at nose circle lid inward flange cylindrical.

[technique effect]

Although each independent technical characteristics of the present invention is completely known, support each other, and can following Advantageous Effects be produced:

(1) zinc base alloy bearing ratio with internal diameter rolling bearing, price can reduce 60-80%, and the larger effect of internal diameter is more remarkable;

(2) zinc base alloy sliding bearing stable working, noise free, radial dimension is little, bearing capacity is large;

(3) sliding bearing abrasion rate is the advantages such as very low, long service life is that rolling bearing is irreplaceable;

(4) structure simple, manufacture, processing, easy accessibility; There is good shock-resistant and good absorbing performance;

(5) can save Bearing Steel 60-80%, old zinc base alloy sliding bearing is recyclable to be cast again.

[accompanying drawing explanation]

Fig. 1. embodiment of the present invention structural representation

[embodiment]

Below in conjunction with accompanying drawing, the present invention is encyclopaedized:

With reference to Fig. 1. a kind of planet differential speed reducer of zinc base alloy bearing supporting output shaft, comprises casing 1 and the transmission part be arranged in casing 1 and output shaft 4, it is characterized in that:

Described casing 1 input end face connects nose circle lid 12, and described nose circle lid 12 endoporus bearing 13 supports input shaft 14;

Described transmission part comprises differential component and quasi-planet parts, described differential component comprises the sun gear be located on input shaft 14, planet wheel 7, spider gear shaft 6, first ring gear 81 and planet carrier 15, described quasi-planet parts comprise accurate sun gear 11, there won't be any problem star-wheel 9, foresight wheel shaft 10, second ring gear 82 and there won't be any problem carrier 16, described planet carrier 15 internal spline connects with accurate sun gear 11 external splines, described accurate sun gear 11 together with planet carrier 15 empty set on input shaft 14, described there won't be any problem carrier 16 is fastened on nose circle lid 12, described first, two ring gears 81, 82 is the two adjacent ring gears in ring gear 8, described ring gear 8 is connected with output shaft 4 disk,

Described output shaft 4 axle journal is provided with wear-resisting ring 5, and described wear-resisting ring 5 is bearing in zinc base alloy bearing 2, and described zinc base alloy bearing 2 is connected to casing 1 output terminal endoporus;

" cylinder-disc type " polyester oil suction sponge 3 of " T " word section is provided with in described output shaft 4, cylindrical end and output shaft 4 axis hole form a shoe cream room Q, described shoe cream room Q lubricant oil flows into alloy bearing and wear-resisting ring gap from output shaft 4 aperture, and disk end is located at the radial hole uniform with disc circumference on output shaft 4 disk end face and communicates, polyester oil suction sponge has excellent mechanical strength: wear-resisting, wear-corrosion resistance, high temperature resistant, stretchability strong, the oil resistant of good springiness and uniqueness is anti-aging, the characteristic of solvent resistant.After casing oil sump lubricant oil is sucked by " cylinder-disc type " polyester oil suction sponge filter core, the oil that its column part stores relies on gravity constantly to drip, accumulate in shoe cream room Q, the rubbing surface between sliding bearing and wear-resisting ring is entered by oilhole little on output shaft, lubricant oil in a steady stream Fill fills, and guarantees that rubbing surface has very long working life.

Above-described embodiment is to explanation of the present invention, is not limitation of the invention, anyly all belongs to protection scope of the present invention to the scheme after simple transformation of the present invention.

Claims

1. a planet differential speed reducer for zinc base alloy bearing supporting output shaft, comprises casing (1) and the transmission part be arranged in casing (1) and output shaft (4), it is characterized in that:

Described casing (1) input end face connects nose circle lid (12), described nose circle lid (12) endoporus bearing (13) supporting input shaft (14);

Described transmission part comprises differential component and quasi-planet parts, described differential component comprises the sun gear be located on input shaft (14), planet wheel (7), spider gear shaft (6), first ring gear (81) and planet carrier (15), described quasi-planet parts comprise accurate sun gear (11), there won't be any problem star-wheel (9), foresight wheel shaft (10), second ring gear (82) and there won't be any problem carrier (16), described planet carrier (15) internal spline connects with accurate sun gear (11) external splines, described accurate sun gear (11) together with planet carrier (15) empty set on input shaft (14), described there won't be any problem carrier (16) is fastened on nose circle lid (12), described first, two ring gears (81, 82) be adjacent two gear rings in ring gear (8), described ring gear (8) is connected with the disk of output shaft (4),

Described output shaft (4) axle journal is provided with wear-resisting ring (5), described wear-resisting ring (5) is bearing in zinc base alloy bearing (2), and described zinc base alloy bearing (2) is connected to casing (1) output terminal endoporus;

" cylinder-disc type " polyester oil suction sponge (5) of " T " word section is provided with in described output shaft (4), cylindrical end and output shaft (4) axis hole form a shoe cream room (Q), described shoe cream room (Q) lubricant oil flows into alloy bearing and wear-resisting ring gap from output shaft (4) aperture, and disk end is located at radial hole uniform with disc circumference on output shaft (4) disk end face and communicates.