CN102261429A

CN102261429A - Upper transmission case of excavator drive system

Info

Publication number: CN102261429A
Application number: CN2011101119194A
Authority: CN
Inventors: 肖宗礼; 肖有恒
Original assignee: FUJIAN JINJIANG DONGSHIXIAOXIA LIANSHENG MACHINERY FITTINGS FACTORY; JIANGYIN LIANSHENG HYDRAULIC MACHINERY CO Ltd
Current assignee: FUJIAN JINJIANG DONGSHIXIAOXIA LIANSHENG MACHINERY FITTINGS FACTORY; JIANGYIN LIANSHENG HYDRAULIC MACHINERY CO Ltd
Priority date: 2011-04-28
Filing date: 2011-04-28
Publication date: 2011-11-30

Abstract

The invention discloses an upper transmission case of an excavator drive system, and relates to an excavator drive system which comprises a shell, an input assembly and an output assembly. The system is characterized in that an output bevel gear shaft is a split structure of an output shaft and a bevel gear; the output shaft integrally extends upward to form an upper shaft body, and the upper part of the upper shaft body is of a ladder shaft shape; a central hole arranged at the upper part of the shell is internally and fixedly provided with an upper bearing seat and a conical roller bearing; the inner hole of the conical roller bearing is fixedly sleeved on the ladder shaft of a shaft body on the output shaft; the upper bearing seat is fixed on the upper end surface of the shell through a bolt; an upper regulating nut which has the same shape with a lower regulating nut is sleeved in a nut hole at the upper part of the ladder hole of the upper bearing seat; and an upper cover is fixed on the upper end surface of the shell through the bolt. The upper transmission case has the advantages that the output bevel gear shaft can not be a cantilever shaft, the mechanical intensity is strengthened, and the noise is lowered.

Description

A kind of upper gear box of excavator transmission system

Technical field:

The present invention relates to the excavator transmission system, particularly a kind of upper gear box of excavator transmission system.

Background technique:

The excavator transmission system is made up of gearbox, upper gear box, underdrive case, front and back output shaft, engine output shaft inserts gearbox, output shaft of gear-box inserts upper gear box, upper gear box is through commutation, be transferred to the underdrive case, output shaft docks with preceding rear axle speed-reducing assembly before and after the underdrive case, gives the front and back ransaxle with power transmission.

The upper gear box structure is by housing, the input assembly, the output assembly is formed, the output assembly is by bearing support, two tapered roller bearings, the input bevel gear shaft is formed, input bevel gear shaft endoporus is a spline, be used for the gearbox input shaft on the hub splines installed implement to dock, the output assembly is by bearing support, two tapered roller bearings, the output bevel gear shaft, adjusting nut, lower end cap is formed, the bearing support fit is fixed in the underpart central hole of housing, the borehole jack sympodium holds on the bearing support step hole, following hole is a tapped hole, in described tapped hole, be sheathed with adjusting nut and be used to regulate the tapered roller bearing internal void, then pass through avris nut lock-bit with the screens sheet in the uniform some radially square grooves on the adjusting nut lower end surface, output bevel gear shaft bottom is the inner splined hole fit of the output flange of splined shaft and flange plate type, be combined in splined shaft end male threaded stub by nut is stubborn, with output flange, lasso under the bearing, bearing inner race is implemented axially locating and is fixed.

This structural imperfection is: two rectangular shape gear engagement of bevel gear shaft, two axis bodies are cantilever-shaped, cantilever engagement poor stability, the bevel gear circular runout is big, solid and bring vibrations, noise greatly, the while also influences gear life.

Summary of the invention:

The objective of the invention is to overcome above-mentioned defective, a kind of upper gear box of excavator transmission system is provided.

The solution of the present invention is: comprise housing, input assembly, output assembly, the output assembly comprises output flange, lower cover, seal ring, bearing support, adjusting nut, tapered roller bearing, output bevel gear shaft, and it is characterized in that: the output bevel gear shaft is that output shaft, bevel gear are divided body structure; The bevel gear endoporus is a splined hole, and described splined hole is linked on the spline axis body of output shaft corresponding position setting; A cover unification tapered roller bearing only on the output shaft of bevel gear below, the output shaft disjunctor that makes progress extends last axis body is arranged, and last axis body bottom is provided with radially protruding dish, and axis body cylindrical fit is fixed with spacing axle sleeve between radially protruding dish and the bevel gear upper-end surface; Last axis body top is step axle shape; Housing top offer with the output shaft coaxial inner conductor on central hole, fit is fixed with and the upper bearing bracket of step with shape in the central hole on described, fit is fixed a tapered roller bearing in the upper bearing bracket step hole lower hole, tapered roller bearing endoporus fixed cover is combined on the step axle of axis body on the output shaft, and upper bearing bracket is by being bolted to the housing upper-end surface; Be sheathed with in the upper bearing bracket step hole upper nut hole and the adjusted nut of following adjusting nut with shape, avris nut lock-bit is radially passed through with the screens sheet in the square groove in adjusted nut upper-end surface; A disk shape loam cake that has an indent blind hole passes the circumferential hole of upper bearing bracket by bolt and is fixed on the housing upper-end surface.

The invention has the advantages that: output bevel gear shaft disjunctor extends and goes up axis body, and bearing splits laying up and down, makes it not become cantilevered axle, and mechanical strength is strengthened, two gear transmission circular runouts reduction, and vibrations, noise all reduce, and have prolonged gear pair service life simultaneously.

Description of drawings:

Accompanying drawing is a structural representation of the present invention.

Embodiment:

Structure of the present invention comprises housing 7, input assembly 2, output assembly, the output assembly comprises output flange 15, lower cover, seal ring, bearing support, adjusting nut 4, tapered roller bearing 3, exports 11 of bevel gears, and it is characterized in that: 11 of output bevel gears are output shaft, 11 fens body structures of bevel gear; Bevel gear 11 endoporus are splined hole, and described splined hole is linked on the spline axis body of output shaft corresponding position setting; Only overlap a unification tapered roller bearing 3 on the bevel gear 11 below output shafts, the output shaft disjunctor that makes progress extends last axis body 8 is arranged, last axis body 8 bottoms are provided with radially protruding dish 9, and axis body 8 cylindrical fits are fixed with spacing axle sleeve 10 between radially protruding dish 9 and bevel gear 11 upper-end surfaces; Last axis body 8 tops are step axle shape; Housing 7 tops offer with the output shaft coaxial inner conductor on central hole, fit is fixed with and the upper bearing bracket 6 of step 12 with shape in the central hole on described, fit is fixed a tapered roller bearing 3 in the upper bearing bracket 6 step hole lower holes, tapered roller bearing 3 endoporus fixed covers are combined on the step axle of axis body 8 on the output shaft, and upper bearing bracket 6 is by being bolted to housing 7 upper-end surfaces; Be sheathed with in the upper bearing bracket 6 step hole upper nut holes and the adjusted nut 4 of following adjusting nut 13 with shape, avris nut lock-bit is radially passed through with screens sheet 5 in the square groove in adjusted nut 4 upper-end surfaces; A disk shape loam cake that has an indent blind hole passes upper bearing bracket 6 circumferential holes by bolt and is fixed on housing 7 upper-end surfaces.

Loam cake also is provided with oil filler, fuel outlet.When spacing axle sleeve 10 effects were 11 lower end nuts of locking output bevel gear, spacing axle sleeve 10 headed on the radially protruding dish 9 of axis body 8, made lasso under bevel gear 11, bearing inner race 14, the bearing, output flange 15 implement axially locating and fixed.Housing 7 relies on its left side to be fixedly coupled plate 1 and implements to fixedly connected with gear box.

Claims

1. the upper gear box of an excavator transmission system, comprise housing (7), input assembly (2), output assembly, the output assembly comprises output flange (15), lower cover, seal ring, bearing support, adjusting nut (4), tapered roller bearing (3), output bevel gear (11) axle, it is characterized in that: output bevel gear (11) axle divides body structure for output shaft, bevel gear (11); Bevel gear (11) endoporus is a splined hole, and described splined hole is linked on the spline axis body of output shaft corresponding position setting; Only overlap a unification tapered roller bearing (3) on the output shaft of bevel gear (11) below, the output shaft disjunctor that makes progress extends last axis body (8) is arranged, last axis body (8) bottom is provided with radially protruding dish (9), and last axis body (8) the cylindrical fit between radially protruding dish (9) and bevel gear (11) upper-end surface is fixed with spacing axle sleeve (10); Last axis body (8) top is step axle shape; Offer last central hole with the output shaft coaxial inner conductor on housing (7) top, fit is fixed with and the upper bearing bracket (6) of step (12) with shape in the central hole on described, fit is fixed a tapered roller bearing (3) in upper bearing bracket (6) the step hole lower hole, tapered roller bearing (3) endoporus fixed cover is combined on the step axle of axis body on the output shaft (8), and upper bearing bracket (6) is by being bolted to housing (7) upper-end surface; Be sheathed with in upper bearing bracket (6) the step hole upper nut hole and the adjusted nut (4) of following adjusting nut (13) with shape, avris nut lock-bit is radially passed through with screens sheet (5) in the square groove in adjusted nut (4) upper-end surface; A disk shape loam cake that has an indent blind hole passes upper bearing bracket (6) by bolt and circumferentially is fixed on housing (7) upper-end surface in the hole.