CN2488967Y

CN2488967Y - Gear box

Info

Publication number: CN2488967Y
Application number: CN 01244251
Authority: CN
Inventors: 李连刚; 董明堂; 王友刚; 郭恒波; 任洪涛; 支开印
Original assignee: LINYI ENGINEERING MACHINERY CO LTD SHANDONG
Current assignee: LINYI ENGINEERING MACHINERY CO LTD SHANDONG
Priority date: 2001-08-07
Filing date: 2001-08-07
Publication date: 2002-05-01
Anticipated expiration: 2011-08-07

Abstract

The utility model discloses a gear box and belongs to the technical field of shovel loader. The utility model comprises a box body, a pump driving axis, an inputting worm wheel, a big overrunning clutch and an outputting axis. On one end of the big overrunning clutch in the box body is provided with a hydraulic pressure shifting clutch which is arranged on a forward-backward gear axis. A middle axis is arranged under the hydraulic pressure shifting clutch, the top of the middle axis is provided with three gears which are respectively engaged with the forward-backward gear axis and the gears on the outputting axis, the two ends of the middle axis are arranged on the box body. Inside of the box body is provided with a shifting trip switch. Top of the outputting axis is provided with a high-low speed shifting engage switch and the trip switch is cooperated with a joggling cover of the engage switch. The utility model has the advantages that: the shifting is quick, portable and balanced; the utility model has no impacting sound, compact structure, long service life of the parts and high pulling efficiency, which is a much ideal parallel axis hemi hydraulic pressure shifting gear box.

Description

A kind of gearbox

The utility model belongs to the loader technical field, relates to a kind of gearbox, especially relates to a kind of parallel axes half hydraulic shift gearbox.

The gearbox of prior art is mainly planetary.As shown in Figure 1, it by casing 12 ', pump driving shaft 1 ', input turbine 2 ', big freewheel clutch 3 ' and output shaft 6 ' etc. form.During work, power is through input turbine 2 ' input, again by each planetary mechanism clutch of big freewheel clutch 3 ' be passed to; When hanging reverse gear, reverse gear piston 7 ' advance, reverse gear planet carrier 8 ' by locking, power successively through sun gear 4 ', reverse gear planetary gear 9 ', one grade of planet carrier 10 ', connect dish 11 ' be passed to gear 13 ', 14 ' output; When hanging second gear, the 5 ' combination of second gear clutch, power through sun gear 4 ' directly be passed to gear 13 ', 14 ' output.This structure planetary transmission has compact conformation, the advantage that rigidity is big, but transmission principle is comparatively complicated, gear shift not rapidly, heavy, unstable, impact sound is arranged, propulsive efficiency is low; Because the part that needs during transferring power is many, easy to wear, the application life of part is short.

The purpose of this utility model provides rapid, light, steady, the no impact sound of a kind of gear shift, the part long service life, and the parallel axes half hydraulic shift gearbox that propulsive efficiency is high is to overcome the deficiencies in the prior art.

For achieving the above object, the utility model has been taked following technical scheme: it is made up of casing, pump driving shaft, input turbine, big freewheel clutch and output shaft etc., an end of big freewheel clutch is provided with the hydraulic shift clutch in casing, is installed on the backward gear axle that advances; The below of hydraulic shift clutch is provided with jackshaft, and three gears are set on the jackshaft, respectively with advance backward gear axle and output shaft on gears engaged, the two ends of jackshaft are installed on the casing; Selector fork is set in the casing, height quick change shelves engaging-piece is set on the output shaft, shift fork cooperates with the engagement cover of engaging-piece.

The gear of jackshaft left end is meshed with backward gear on the backward gear axle that advances by an idler gear; The gear at middle part is meshed with the low-speed gear on the output shaft; The gear of right-hand member respectively with the backward gear axle that advances on the drive shift gear and the high gear on the output shaft be meshed.

Establish high low speed lining in the high, low speed gear on the output shaft, be sleeved on the output shaft.

The gear shift of the utility model advance and retreat shelves employing hydraulic clutch, high low speed adopts the gear shift of engaging-piece shift fork.The advance and retreat shelves adopt hydraulic shift, make rapid, light, steady, the no impact sound of gear shift; High low speed adopts the shift fork gear shift, makes compact overall structure, and gear shift is light; Each travelling gear often meshes in the operation casing, and shifting shock is little, has prolonged the application life of gear; Owing to abandoned planetary gear shift, adopt the fixed shaft type structure, power transmission line is more directly perceived, and the transmission velocity ratio setting is more reasonable, has improved the propulsive efficiency of loader.

Fig. 1 is a prior art planetary transmission structural representation;

Fig. 2 is the utility model structural representation.

Fig. 3 is the structural representation of hydraulic shift clutch among Fig. 2

Be elaborated below in conjunction with the utility model structural representation:

By Fig. 2, shown in Figure 3, the utility model comprises casing 9, pump driving shaft 1, input turbine 2, big freewheel clutch 3 and output shaft 8, and an end of big freewheel clutch 3 is provided with hydraulic shift clutch 4 in casing 9, is installed on the backward gear axle 14 that advances; The below of hydraulic shift clutch 4 is provided with jackshaft 7, and two ends are installed on the casing 9, and three

gears

6,12,13 are set on the jackshaft 7; Selector fork 15 is set in the casing 9, height quick change shelves engaging-piece 18 is set on the output shaft 8, shift fork 15 matches with the engagement cover 16 of engaging-piece 18.Gear 6 on the jackshaft 7 is meshed with backward gear 10 on the backward gear axle 14 that advances by gear 5; Gear 12 is meshed with low-speed gear 20 on the output shaft 8; Gear 13 respectively with the backward gear axle 14 that advances on drive shift gear 11 and the high gear 17 on the output shaft 8 be meshed.

During work, power is passed to hydraulic shift clutch 4 by big freewheel clutch 3 again through 2 inputs of input turbine.The combination of hydraulic shift clutch 4 with separate, control by the stick control gear valve on the loader, when pressure oil enters respectively in the backward gear oil cylinder 24 that advances of hydraulic shift clutch 4, promote piston 23, make driving and driven friction plate 22 combinations of clutch, and transfer torque, power is spread out of by drive shift gear 11 and backward gear gear 10 respectively, finishes the advance function of reverse motion of loader; When cut-out pressure oil incoming road, piston 23 makes driving and driven friction plate 22 freely separate each other under the effect of spring 25.Just quick change shelves engaging-piece 18, and by the control of the stick control pull bar on the loader, pulling handle during gear shift makes selector fork 15 stir engagement cover 16 and meshes with high low-speed gear 17,20 respectively, realizes gear shift; Engagement cover 16 and high low-speed gear 17,20 are handled through cavetto in conjunction with the tooth edge, can realize engagement fast and accurately, and high low speed lining 19,21 adopts composite materials, the rub proofness height, and oil leab all is set at end face and endoporus, cooling property is good.

The utility model power transmission process is as follows:

Advance at a high speed: forward clutch combination → gear 11 → gear 13 →

High speed engaging-piece engagement → gear 17;

Low speed advances: forward clutch combination → gear 11 → gear 13 →

Low speed engaging-piece engagement → gear 12 → gear 20;

Fall back at a high speed: clutch combination → gear 10 → gear 5 → gear 6 falls back

High speed engaging-piece engagement → gear 13 → gear 17;

Low speed falls back: clutch combination → gear 10 → gear 5 → gear 6 falls back

Low speed engaging-piece engagement → gear 12-gear 20.

Claims

1, a kind of gearbox, comprise casing (9), pump driving shaft (1), input turbine (2), big freewheel clutch (3) and output shaft (8), it is characterized in that: an end of big freewheel clutch (3) is provided with hydraulic shift clutch (4) in casing (9), is installed on the backward gear axle (14) that advances; The below of hydraulic shift clutch (4) is provided with jackshaft (7), and three gears (6,12,13) are set on the jackshaft (7); Respectively with advance backward gear axle (14) and output shaft (8) on gear (10,11 and 20,17) engagement, the two ends of jackshaft (7) are installed on the casing (9); The built-in selector fork of casing (9) (15) is provided with height quick change shelves engaging-pieces (18) on the output shaft (8), shift fork (15) matches with the engagement cover (16) of engaging-piece (18).

2, a kind of gearbox according to claim 1 is characterized in that: the gear (6) on the said jackshaft (7) is to be meshed with backward gear (10) on the backward gear axle (14) that advances by an idler gear (5); The gear (12) at middle part is meshed with the low-speed gear (20) on the output shaft (8); Gear (13) respectively with the backward gear axle (14) that advances on drive shift gear (11) and the high gear (17) on the output shaft (8) be meshed.

3, a kind of gearbox according to claim 1 and 2 is characterized in that: establish high low speed lining (19,21) in the high low-speed gear on the said output shaft (8) (17,20), be sleeved on the output shaft (8).

4, a kind of gearbox according to claim 3 is characterized in that: said engagement cover (16) and high low-speed gear (17,20) are handled through cavetto in conjunction with the tooth edge.

5, a kind of gearbox according to claim 4 is characterized in that: said high low speed lining (19,21) adopts Composite Preparation.