CN2060831U

CN2060831U - Inter-tooth planet differential gearing

Info

Publication number: CN2060831U
Application number: CN 89219828
Authority: CN
Inventors: 周福尧
Original assignee: Metallurgical Design & Research Inst Hebei Prov
Current assignee: Metallurgical Design & Research Inst Hebei Prov
Priority date: 1989-11-16
Filing date: 1989-11-16
Publication date: 1990-08-22

Abstract

The utility model discloses an inter-tooth planet differential gearing which is provided with support members of axial points between the inner end of a sun wheel shaft and a planetary wheel frame, and the output mechanism of the planetary frame is assembled by adopting the planetary frame and an axle discrete part. The outer circumference groove and radial through holes on the bottom of the groove are installed in the tooth ring of the internal tooth, and the lubricating-oil can be injected into the cavity automatically by utilizing the engagement of the external tooth. After adopting the improvement, the inter-tooth planet differential gearing has prolonged service life. The processing and assemblage manufacturability are improved, and the manufacturing cost is reduced. The inter-tooth planet differential gearing is particularly used in the heavy-load and big impact load such as the main driving of a rolling mill.

Description

Inter-tooth planet differential gearing

The utility model relates to a kind of inner tooth planet gear differential mechanism, and belonging to has the differential motion of track spur wheel technical field.

Inner tooth planet gear drive device is widely used in heavy duty, large impact load occasions such as rolling mill main transmission as differential speed regulation mechanism.The structural design of existing this class differential mechanism, mainly expose following defective in using at the scene, the single-row centripetal bearing that the first is used for sun wheel shaft supporting directly bears the responsive to axial force of assembling and operation process, working life is shorter, it two is planet carrier and output shaft solid forging, and the manufacturing process difficulty is big; At last, the gear of differential mechanism inner chamber and bearing lubrication difficulty, perhaps lubrication oil supply mechanism is too complicated, perhaps insufficient lubrication.

The purpose of this utility model is to provide a kind of improved inner tooth planet gear differential design design, is applicable to heavy duty, and the production of the differential mechanism under the large impact loading condiction and use need.

Task of the present utility model is achieved in that

1, increase an axial point supporting between the interior axle head of sun wheel shaft and planet carrier, this some supporting is formed by the contact of plane one sphere;

2, the planet carrier output mechanism is assembled by planet carrier and two discrete parts of output shaft;

3, open a circumferential groove on the outer driving cog of interior toothed ring gear, bottom land is provided with a plurality of radially ducts and communicates with the gear ring inner chamber.

The inside axial displacement of sun wheel shaft can be effectively placed restrictions in the supporting of the axial point of axle head in the sun wheel shaft, and this displacement occurs in assembling and big conflict load occasion, and the past often causes block bearing to damage.Between sun wheel shaft Transverse plane and planet carrier central authorities auxiliary hole, one spheroid is set, perhaps spherical plate is placed between sun wheel shaft the inner and the planet carrier, just can form this axial point supporting.

It is that planet carrier can be used Cast Steel after discrete parts was assembled that the planet carrier output mechanism changes former solid forging form, and output shaft is with forging or additive method processing, so both can guarantee the usability of mechanism, can improve component processing method greatly again, reduce cost, shorten the process-cycle.After adopting new structure, need suitably to strengthen the inside diameter D of planet carrier block bearings (being the differential mechanism main step bearing), in the design with the centre distance size A of planet wheel and sun gear nominal size as bearing bore diameter D.Because this variation, the optional selfaligning bearing of bearing between sun wheel shaft and the non-output planetary frame replaces the conventional thin single-row centripetal bearing that adopts.

Circumferential groove and the radial direction through hole opened on the differential mechanism gear ring, to the pressure of lubricant oil, oil is injected the differential mechanism inner chamber in the time of can directly utilizing external tooth transmission engagement, to solve the internal lubrication difficulty, naturally the appearance of this periphery circular groove must be satisfied the requirement of gear ring and external gear intensity.

After adopting above-mentioned improvement, obviously improve the working life of inner tooth planet gear differential mechanism, and processing and assembly process process improve, and manufacture cost reduces, and particularly suitable uses under heavy duties such as rolling mill main transmission, large impact load.

Below in conjunction with drawings and Examples the utility model is elaborated.

Fig. 1 improves back inner tooth planet gear differential design figure.

Fig. 2, the 3rd, sun wheel shaft and planet carrier axial point support other two kinds of forms.

Referring to Fig. 1, the wheel shaft 1 of sun gear 7 is held on the planet carrier 10 through 17 on bearing, 10 of the interior axle head of wheel shaft 1 and planet carriers also are provided with axially mounting device 15, and this device is made of with the flat board that is located at planet carrier 10 central authorities the spherical plate that is located on wheel shaft 1 axle head.

Planet carrier 10 is a foundry goods, is integral with output shaft 11 processing back devices.Main step bearing 9,3 is bearing on planet carrier 10 and the non-output planetary wheel carrier 16, because the change of planet carrier 10 structures, bearing 9 internal diameters must amplify.Getting centre distance A in the design is the reference dimension of bearing 9 and bearing 3 inside diameter D.After amplifying this size, the supporting axle 2 optional selfaligning bearings of sun wheel shaft 1 outer end.

Have circumferential groove 14 on the ring gear 12, bottom land has a plurality of ducts 13 to work hard in glove with inner chamber.During running, during the engagement of gear ring 12 external tooths, lubricant oil is injected gear ring 12 inner chambers by engaging pressure through groove 14 and hole 13.

Gear ring 12 is held on the

planet carrier

10,16 through framves such as side covers 4,8 among the figure, and planet wheel 5 is held on the planet wheel shaft through 6 on bearing, and these are the general members of differential mechanism.

Spherical plate 18 is located on planet carrier 10 auxiliary holes among Fig. 2, and dull and stereotyped 19 are located on the interior edge face of sun gear wheel shaft 1, forms the axial point supporting.

Be provided with rigid spheres 20 in the auxiliary hole of planet carrier 10 central authorities among Fig. 3, form the axial point supporting between the flat board 19 on this spheroid sphere and sun wheel shaft 1 end face.

After adopting the some support mechanism of sun gear axle head among Fig. 1,2 or 3, assemble and axial force is directly born in the time point supporting that is hit, protected the block bearing 2 of sun wheel shaft 1.Each component processing and the installation precision that constitute above-mentioned axial point supporting must be guaranteed, also must be through heat treatment to improve the supporting point wear resistance.

Claims

1, a kind of internal tooth planetary differential is characterized in that:

1.1, also be provided with a plane one protruding sphere axial point supporting mechanism between sun wheel shaft the inner and the planet carrier,

1.2, planet carrier transmission output mechanism is assembled by planet carrier and two discrete parts of output shaft,

1.3, have circumferential groove and a plurality of bottom land through hole on the interior toothed ring gear.

2, by the described internal tooth planetary differential of claim 1, it is characterized in that the planet carrier in the described planet carrier transmission output mechanism is a Cast Steel.

3,, it is characterized in that described sun wheel shaft axial point support mechanism is provided with a protruding spherical plate according to the described internal tooth planetary differential of claim 1.

4, by the described internal tooth planetary differential of claim 1, it is characterized in that described sun wheel shaft axial point support mechanism is provided with a rigid spheres.