CN2288102Y

CN2288102Y - Variable speed gear for agricultural motor-vehicle

Info

Publication number: CN2288102Y
Application number: CN 96248448
Authority: CN
Inventors: 隋志强
Original assignee: SHENGJIAN MACHINERY PLANT DEZHOU CITY SHANDONG PROV
Current assignee: SHENGJIAN MACHINERY PLANT DEZHOU CITY SHANDONG PROV
Priority date: 1996-11-28
Filing date: 1996-11-28
Publication date: 1998-08-19
Anticipated expiration: 2006-11-28

Abstract

The utility model relates to a variable speed gear for agricultural motor vehicles, increasing low speed gear under the condition of not increasing the number of axles, and not changing the speed changing control type. The utility model has the technical proposal that a reverse gear shaft 9 is provided with a low-speed gear shifting slide gear 7; a variable-speed input shaft 1 is connected with a double-gear type idle gear 12 by the cooperation of a bearing 11; the low-speed gear shifting slide gear 7, the double-gear type idle gear 12, and a right shifting slide gear 16 can be successively meshed to form a power-transmission chain. The utility model has the advantages of large low speed transmission ratio, simple structure, and good versatility. The utility model is applied to the transformation and renovation of the existing linking speed changers.

Description

The Agricultural automotive vehicle transmission system

The utility model relates to a kind of Agricultural automotive vehicle transmission system, particularly change speed gear box and drive axle Contiuum type transmission system.

At present, agricultural motor tricycle and simple type four-wheeled adopt change speed gear box and drive axle Contiuum type transmission system mostly.It is mainly by change speed gear box (belt leather pulley clutch) assembly, and selector gear and back axle (band brake) assembly is formed.The power of driving engine output passes to change speed gear box input shaft (primary shaft) by belt, passes to the back axle assembly drive wheels through output shaft (second) again, and its transforming gear is realized by the selector gear that shift fork and fork shaft constitute.The change speed gear box of this Contiuum type transmission system generally adopts 3+1 shelves (3 D Drives, 1 reverse gear), has advantages such as simple in structure, cheap practicality.But owing to limited to by structure, its transmitting ratio is less, though can satisfy over-the-road transportation, can not satisfy farm work slow running requirement.To this, there is producer to adopt automobile four-speed gear box structure, designed 4+1 shelves (4 D Drives, 1 reverse gear) change speed gear box.Outside speed change input shaft, output shaft, increased tween drive spindle again, and output shaft is bearing on the inner chamber bearing of input shaft rear end, diaxon is coaxial line and installs.Also there be less than normal negative of output shaft rigidity in plurality of advantages such as this triple axle speed change pattern has compact conformation, and volume is little.In view of the automobile gearbox input shaft becomes rigid connection with the driving engine mouth, its negative effect is less relatively, is that non-institute is suitable and be used for the Contiuum type farm vehicle.Because Contiuum type change speed gear box input shaft and driving engine mouth are by the non-rigid connection of belt, input shaft bears the impact load of being jolted and being caused by uneven road surface, the rigidity of axle is degenerated, reduce fatigue life, and along with the rigidity of axle worsens, cause that sag of axle becomes big, fault rate out of supply is increased, bring new problem for the safe reliability of farm vehicle.Other has producer on the basis of still continuing to use present through input shaft 3+1 shelves change speed gear box, by increasing tween drive shaft, adopts major and minor speed change to handle, and has designed the three wheeled motor car multi-speed gear box.Based on agricultural tricycle Maximum speed limit 40 km/h, many grades of (more than 6 grades) speed changes can increase transmitting ratio, but the inter-stage layout is tending towards intensive, adds the major-minor speed change, makes structure, complicated operationization.

Goal of the invention of the present utility model provide a kind of simple in structure, good with existing 3+1 shelves commonality, have a 4+1 shelves farm vehicle Contiuum type transmission system that is suitable for the farmland operation low gear.

The technical solution of the utility model is to the effect that: on the basis of original Contiuum type 3+1 shelves change speed gear box, utilize reverse gear constant mesh gear pair, increase bootom gear, middle idle wheel, low gear shift fork and fork shaft, realize the slow running shelves that a newly-increased level Four is slowed down.Contiuum type 3+1 shelves change speed gear box is equipped with three mutual out-of-alignment speed change input shafts, output shaft and reverse gear shafts.Often nibbling main, ring gear is fixedly mounted on respectively on input shaft and the reverse gear shaft, bootom gear connects slippage with spline pair and is installed on the reverse gear shaft, middle idle wheel is that a dual gear that contains the different numbers of teeth is bearing on the input shaft with bearing, the big gear wheel of one side and bootom gear slip engagement, shifting slide gear engagement that is in Neutral Position on miniature gears of its opposite side and the output shaft.The power of driving engine output is passed to the speed change input shaft through belt, and the secondary one-level that realizes of the constant mesh gear on input shaft and reverse gear shaft is slowed down; Shift fork is stirred the bottom gear gear on the reverse gear shaft and the big gear wheel slip engagement of middle idle wheel, realizes double reduction; Locate a shifting slide gear engagement of hand Neutral Position in the middle of this moment on the miniature gears of idle wheel and the output shaft, realize three grades of decelerations; Main deceleration big gear wheel on the output shaft on hard-wired main reduction pinion teeth and the rear-axle differential is often nibbled, and finishes level Four and slows down, and power is passed to semiaxis by diff, drive wheels.

The difference of the utility model and prior art scheme: one, a dual gear is housed on the speed change input shaft, this dual gear is supported on the axle with bearing, bear the middle idle wheel function of speed change and commutation, it is characterized in that design has the middle idle wheel of the dual gear formula that connects with the bearing supporting on the speed change input shaft; They are two years old, the transmission front end of this centre idle wheel and the bootom gear slip engagement on the reverse gear shaft, shifting slide gear on its transmission rear end and the output shaft meshes when being in Neutral Position, in the middle of it is characterized in that the transmission design of idle wheel respectively with reverse gear shaft and output shaft on shifting slide gear constitute messenger chain; They are three years old, input shaft is passed to the dynamic loading of reverse gear shaft by the constant mesh gear pair, bootom gear on reverse gear shaft, middle idle wheel on the input shaft, the shifting slide gear on the output shaft, pass to output shaft, thereby need not tween drive shaft transmission and commutation, the low speed gear shift is realized on reverse gear shaft, it is characterized in that the design of reverse gearwheel and low gear shifting slide gear is on same axle.

Concrete structure of the present utility model is such: a kind of Agricultural automotive vehicle transmission system, comprise the speed change input shaft 1 that links to each other with belt pulley (band power-transfer clutch) assembly 23 that places in the gearbox body 10, output shaft 17, reverse gear shaft 9, constant

mesh gear pair

3,4, II shelves gear 13, III shelves gear 5, IV shelves gear 2, reverse gearwheel 8, main

reduction gear pair

14,18, and right shifting slide gear 16 and left shifting slide gear 22, the shaft assy., rear axle 20 that is connected with rear-axle differential assembly 19, the speed change that combines with left and right sides shifting slide gear is handled shift fork 21,15, it is characterized in that having installed one between ring gear 4 and the reverse gearwheel 8 and being connected the low gear shifting slide gear 7 that speed change is handled shift fork 6 with what spline pair cooperated often nibbling on the reverse gear shaft 9 with reverse gear shaft 9, a middle idle wheel 12 of dual gear formula that is connected by bearing 11 with speed change input shaft 1 has been installed, low gear shifting slide gear 7 between III shelves gear 5 on the speed change input shaft 1 and II shelves gear 13, idle wheel 12 and right shifting slide gear 16 can mesh the formation power chain successively in the middle of the dual gear formula.

The utility model has increased a low gear (I shelves) on the basis of original Contiuum type 3+1 shelves transmission system, its 4 D Drives and 1 reverse gear are following realizations.

Low gear (I shelves): the power by driving engine output is passed to input shaft 1 through belt drive belt pulley 23, often nibble driving gear 3 and often nibble ring gear 4 and pass to reverse gear shaft 9 through hard-wired again, supporting the middle idle wheel 12 of a duplex gear type by bearing 11 on the input shaft 1, stir the left side big gear wheel engagement of low gear shifting slide gear 7 and middle idle wheel 12 by shift fork 6, the miniature gears on idle wheel 12 right sides and right shifting slide gear 16 engagements that are in Neutral Position in the middle of this moment, power passes to output shaft 17 by reverse gear shaft 9, pass to rear-axle differential assembly 19 through main reduction pinion teeth 14 with the main deceleration big gear wheel 18 that it is often nibbled again, drive shaft assy., rear axle 20 thus, drive wheels.

II shelves: stir right shifting slide gear 16 by shift fork 15, make 13 engagements of itself and hard-wired II shelves gear, this moment, power reached output shaft 17 through input shaft 1, again through main reduction pinion teeth 14 and with its main deceleration big gear wheel 18 of often nibbling, pass to rear-axle differential assembly 19, drive semiaxis assembly 20.

III shelves: stir left shifting slide gear 22 by shift fork 21, make 5 engagements of itself and hard-wired III shelves gear, this moment, power passed to output shaft 17 through input shaft 1, again through main reduction pinion teeth 14 and with its main deceleration big gear wheel 18 of often nibbling, pass to rear-axle differential assembly 19, drive semiaxis assembly 20.

IV shelves: stir left shifting slide gear 22 by shift fork 21, make 2 engagements of itself and hard-wired IV shelves gear, this moment, power reached output shaft 17 through input shaft 1, again through main reduction pinion teeth 14 and with the main deceleration big gear wheel 18 of its constant-mesh, pass to rear-axle differential assembly 19, drive semiaxis assembly 20.

Reverse gear: pass to reverse gear shaft 9 through constant mesh gear secondary 3 and 4 by the power that input shaft 1 transmits, stir right shifting slide gear 16 by shift fork 15, itself and reverse gearwheel 8 are meshed, this moment, power reached output shaft 17 by reverse gear shaft 9, again through the main deceleration big gear wheel 18 of main reduction pinion teeth 14 with its constant-mesh, pass to rear-axle differential assembly 19, drive shaft assy., rear axle 20 thus, drive wheels.

The utility model can make original Contiuum type 3+1 shelves transmission system not increase variable shaft owing to taked technique scheme, does not change the speed change maneuverability pattern, is different from existing speed changing structure, increases slow running shelves.Its low speed ratio is big, simple in structure, dependable performance, it is good to have the technology inheritance, characteristics such as cheap practicality, be applicable to the demand that at present the Contiuum type change speed gear box is increased low speed ratio, effectively overcome the deficiency that exists in the prior art, for farm vehicle has new departure that the farmland operation speed functions provides a kind of economical rationality concurrently.

Accompanying drawing 1 is aufbauprinciple signal of the present utility model (section) figure.

Among the figure, 1 speed change input shaft, 2 IV shelves gears, 3 often nibble driving gear, and 4 often nibble ring gear, 5 III shelves gears, 6 low gear shift forks, 7 low gear shifting slide gears, 8 reverse gearwheels, 9 reverse gear shafts, 10 gearbox bodys, 11 bearings, idle wheel in the middle of the 12 dual gear formulas, 13II shelves gear, 14 main reduction pinion teeths, 15 right shifting slide gear shift forks, 16 right shifting slide gears, 17 output shafts, 18 main deceleration big gear wheels, 19 rear-axle differential assemblies, 20 shaft assy., rear axles, 21 left shifting slide gear shift forks, 22 left shifting slide gears, 23 belt pulleys (band power-transfer clutch) assembly.

Among the embodiment of the present utility model, bearing 11 adopts two needle bearings that idle wheel 12 in the middle of the dual gear formula is installed on the speed change input shaft 1.

Claims

1, a kind of Agricultural automotive vehicle transmission system, comprise the speed change input shaft (1) that links to each other with belt pulley assembly (23) that places in the gearbox body (10), output shaft (17), reverse gear shaft (9), constant mesh gear pair (3), (4), II shelves gear (13), III shelves gear (5), IV shelves gear (2), reverse gearwheel (8), main reduction gear pair (14), (18), and right shifting slide gear (16) and left shifting slide gear (22), the shaft assy., rear axle (20) that is connected with rear-axle differential assembly (19), the speed change that combines with left and right sides shifting slide gear is handled shift fork (21), (15), it is characterized in that having installed one between ring gear (4) and the reverse gearwheel (8) and being connected the low gear shifting slide gear (7) that speed change is handled shift fork (6) often nibbling on the reverse gear shaft (9) with reverse gear shaft (9) spline pair cooperates, a middle idle wheel (12) of dual gear formula that is connected by bearing (11) with speed change input shaft (1) has been installed, low gear shifting slide gear (7) between last III shelves gear (5) of speed change input shaft (1) and II shelves gear (13), idle wheel (12) and right shifting slide gear (16) can mesh the formation power chain successively in the middle of the dual gear formula.