CN87212908U

CN87212908U - Diffenential mechanism for planet gear with outside gear

Info

Publication number: CN87212908U
Application number: CN 87212908
Authority: CN
Inventors: 周福尧
Original assignee: Metallurgical Design & Research Inst Hebei Prov
Current assignee: Metallurgical Design & Research Inst Hebei Prov
Priority date: 1987-08-28
Filing date: 1987-08-28
Publication date: 1988-07-20

Abstract

The utility model discloses a positive sign or outer sign differential mechanism for a planet gear with an outside gear, which is characterized in that the diameter of a planet gear shaft which is matched with a gear is 0.60-0.75 times bigger than the diameter of a reference circle of the planet gear. A thrust roller gear is arranged at the middle of a sun wheel shaft with three supporting points. A baffle ring is arranged on a planet wheel shaft. The sun wheel shaft is a conical shaft head. The utility model solves the problem that a middle gear is easy to be damaged in present technique with big maintenance load and inconvenient maintenance. The utility model has the advantages of convenient maintenance, easy manufacture and high capability, etc., and is suitable for the differential speed regulation of machines such as rolling mills, etc.

Description

Diffenential mechanism for planet gear with outside gear

The utility model belongs to satellite differential, and particularly a kind of positive sign or negative sign external tooth satellite differential that big bearing capacity is arranged that is beneficial to maintenance is particularly useful for the differential speed regulation of rolling mill main transmission.

The existing positive sign external tooth satellite differential that is used for rolling mill, have casing and be contained in three above planet wheel shafts and two sun wheel shaft on the casing by bearing, the sun gear that is fixed on the planetary pinion on the planet wheel shaft and is fixed on the sun wheel shaft is helical gear, for under same volume, improving bearing capacity, gear broken shell (referring to casing) and going out, the ratio of the sun gear of input end and the planet wheel speed that is engaged with is 0.7-1.10.But above-mentioned positive sign external tooth satellite differential only is to determine the planet wheel shaft diameter from the intensity viewpoint, and the diameter of axle is thinner like this, and the spindle nose diameter of therefore adorning rolling bearing is little, and the planet wheel bearing life-span is short, and is fragile, causes very big workload to maintenance; In addition, because sun gear adopts three fulcrum shafts (wherein two fulcrums are in sun gear one side) and three aligning ball bearings, requirement sternly, and is fragile, gives processing, makes, assembles, keeps in repair and bring very big difficulty.Once more, because sun wheel shaft and coupling are the cylinder drive fit, coupling is not easy to assemble, so that causes gear to destroy between planet wheel and the sun gear when the planet wheel bearing ball that extends service in the army drops to.For negative sign external tooth satellite differential, though at present kinematic sketch is arranged, do not see example of Design, be applied in the differential speed regulation.

Task of the present utility model provides a kind of positive sign or the new structural design of negative sign external tooth satellite differential, solves the difficult problem of its maintenance.

Task of the present utility model is to realize like this, it at first is the workload that reduces maintenance significantly, the design of breaking the normal procedure, thereby strengthen the planet wheel shaft diameter and strengthen the bearing diameter that matches, make coupling have the planet wheel shaft diameter of bearing be the planetary pinion standard pitch diameter 0.60-0.75 doubly, three bearings are housed on the every sun wheel shaft, its intermediate bearing thrust roller bearing, this outer race and casing be combined with 〉=gap of 0.2mm, the thrust roller bearing free gap is big, can regulate voluntarily 3 nonconcentricity, can bear axial force again simultaneously, not fragile, be convenient to mounting or dismounting.

For the little ball of planet wheel bearing mill that prevents to damage drops between planet wheel and sun gear, cause gear to damage and scrap, between planet wheel and bearing, baffle ring can be housed on the planet wheel shaft.In order to make coupling easy to assemble, be preferably in and have one on the sun wheel shaft and realize that with coupling circular cone cooperates the spindle nose of easy-to-mount circular cone spindle nose or band conical bore.

The utility model also provides a kind of novel negative sign external tooth differential mechanism, it has casing and is contained in two sun wheel shaft and six roots of sensation planet wheel shaft on the casing by bearing, the sun gear that it is characterized in that being fixed on the planet wheel on the planet wheel shaft and be fixed on the sun wheel shaft is helical gear, gear pips, coupling have the planet wheel shaft diameter of bearing be the planetary pinion standard pitch diameter 0.60-0.75 doubly, three bearings are housed on the every sun wheel shaft, its intermediate bearing thrust roller bearing, this outer race and casing be combined with 〉=gap of 0.2mm.More convenient for dismounting, on sun wheel shaft, have a spindle nose that cooperates easy-to-mount circular cone spindle nose or band conical bore with coupling realization circular cone.

Compared with prior art, the utlity model has the advantage that maintenance load is little, be easy to the dismounting maintenance, simultaneously, technology capability is good, and bearing capacity also is improved.Negative sign external tooth differential mechanism can be used in the transmission of high speed continuous mill, and resultant gear ratio can approach 1.

Be described in detail below in conjunction with drawings and Examples.

Fig. 1 is the structural drawing of positive sign external tooth differential mechanism.

Fig. 2 is the left sectional view of Fig. 1.

Fig. 3 is a positive sign external tooth differential mechanism kinematic sketch.

Fig. 4 is negative sign external tooth differential design figure.

Fig. 5 is the left sectional view of Fig. 4.

Fig. 6 is the kinematic sketch of negative sign external tooth differential mechanism.

Fig. 7 is the left view of Fig. 6.

Referring to Fig. 1, Fig. 2, piece number 1 are sun gear A axle, and axle head is conical, and 3 bearing supportings are housed on the axle; Piece number 2 is a sun gear A intermediate bearing, adopts bearing with cross roller convex symmetrical roller bearing (GB 303-64); Piece number 3 is a planet wheel bearing, adopts single-row centripetal cylindrical roller bearing (GB283-64); Piece number 4 is planet wheel E, and its standard pitch diameter is 310, and shaft diameter is φ 220, and bearing diameter is φ 160; Piece number 5 is planet wheel F; Piece number 6 is the planet wheel bearing baffle ring; Piece number 7 is a casing; Piece number 8 is sun gear B; Piece number 9 is a sun gear B axle, and axle head is conical; Piece number is 10 to be that sun wheel shaft is with double row self aligning spherical roller bearing (GB286-64); Piece number 11 is sun gear A; Piece number 12 is the bearing support plate.

Referring to Fig. 4, Fig. 5, piece number 13 is single-row tapered roller bearing (GB297-64); Piece number 14 is a planet wheel shaft, and no baffle ring has a reverse wheel, all the other separately title and embodiment's parameter all with Fig. 1, Fig. 2 with.

All can be used for the differential speed regulation of continuous mill.

Claims

1, a kind of positive sign external tooth satellite differential, have casing and be contained in three above planet wheel shafts and two sun wheel shaft on the casing by bearing, the sun gear that is fixed on the planetary pinion on the planet wheel shaft and is fixed on the sun wheel shaft is helical gear, gear pips, the sun gear of input end is 0.7-1.10 with the ratio of the planet wheel speed that is engaged with, it is characterized in that mating have the planet wheel shaft of bearing diameter be the planetary pinion standard pitch diameter 0.60-0.75 doubly, three bearings are housed on the every sun wheel shaft, its intermediate bearing thrust roller bearing, this outer race and casing be combined with 〉=gap of 0.2mm.

2, positive sign external tooth satellite differential according to claim 1 is characterized in that between planet wheel and bearing baffle ring being housed on the planet wheel shaft.

3, positive sign external tooth satellite differential according to claim 1 and 2 is characterized in that having on the sun wheel shaft one and realizes that with coupling circular cone cooperates easy-to-mount circular cone spindle nose.

4, a kind of negative sign external tooth satellite differential, have casing and be contained in two sun wheel shaft and six roots of sensation planet wheel shaft on the casing by bearing, the sun gear that it is characterized in that being fixed on the planet wheel on the planet wheel shaft and be fixed on the sun wheel shaft is helical gear, gear pips, coupling have the planet wheel shaft diameter of bearing be the planetary pinion standard pitch diameter 0.60-0.75 doubly, three bearings are housed on the every sun wheel shaft, its intermediate bearing thrust roller bearing, this outer race and casing are combined with 〉=the 0.2mm gap.

5, negative sign external tooth satellite differential according to claim 4 is characterized in that having on the sun wheel shaft one and realizes that with coupling circular cone cooperates easy-to-mount circular cone spindle nose.