CN2888188Y

CN2888188Y - Transmission case of simple walking tractor

Info

Publication number: CN2888188Y
Application number: CN 200620071480
Authority: CN
Inventors: 沈崇鑫; 张建华; 曹薛红
Original assignee: CHANGZHOU DONGFENG AGRICULTURAL MACHINERY GROUP Co Ltd
Current assignee: CHANGZHOU DONGFENG AGRICULTURAL MACHINERY GROUP Co Ltd
Priority date: 2006-05-18
Filing date: 2006-05-18
Publication date: 2007-04-11
Anticipated expiration: 2016-05-18

Abstract

A gear box of simple type hand tractor comprises box body, main shaft, steering shaft, deceleration shaft, two semi-axles, gears connected with different shafts and bearing cover on two sides of box body, the box body is dissection box body composed of left box body and right box body through fastening parts; the shaft gears II connected on shaft II are often mesh with main shaft gear on main shaft and central transmitting gear on steering shaft, the matching of concave and convex teeth on inner side of steering gear and concave convex teeth on both sides of central transmitting gear compose the teeth type steering clutch, two turning shift fork assembly connected with two steering gears; two semi-axles are separately connected with and right box bodies through two semi-axle bodies, the driving gear on semi-axle is fixed with locknut for axial direction limit, the reduction gears on deceleration shaft are separately meshed with steering gear and driving gear. The utility model has features of single speed, high transmission efficiency, small volume and low manufacturing cost.

Description

Simple type hand tractor gearbox

Technical field

The utility model relates to a kind of hand tractor gearbox, especially relates to simple type hand tractor gearbox.

Background technique

Middle fraction horsepower hand tractor is as one of main agricultural machinery and implement, and is comparatively universal at home.Along with updating and developing to hand tractor, most hand tractors are combined into monolithic construction to transmission case, gearbox and final transmission case, six or eight configurations, (3+1) shelves or (3+1) * 2 grade speed change, with simplified structure, and pinion unit is optimized arrangement design, makes product have more gear, can satisfy various operation needs, but multi-functional product structure complexity, Applicable scope expansion, the cost price of meaning improves, uses the also corresponding raising of maintenance requirement.But for paddy-field-working, the hand tractor bad adaptability of many gears, some gear is no substantially, at the bottom of the gear utilization ratio, relative manufacture cost height is to certain user colony, especially dense waterway net region low income peasant household, economic serviceability deficiency.

Summary of the invention

It is single that the purpose of this utility model provides a kind of speed, the transmission efficiency height, and volume is little, the simple type hand tractor gearbox of low cost of manufacture.

The utility model is that the technological scheme that achieves the above object is: a kind of simple type hand tractor gearbox, comprise casing and be connected main shaft, steering shaft, deboost axle, two semiaxis on the casing and be connected the gear on each and be connected the parts such as bearing cap of casing both sides, it is characterized in that:

(1), the split type casing that connects and composes by fastening piece by left box body and right case of described casing, and be provided with corresponding setting sleeve at least in left box body and two attachment holes of right case;

(2), described mainshaft bearing cap and spindle bearing are connected in the outer side surface of left box body and right case respectively, main shaft is connected on mainshaft bearing cap and the spindle bearing by bearing, the II axle, steering shaft and deboost axle are connected on left box body and the right case, be connected on the II axle the II shaftgear respectively be connected the mainshaft gear on the main shaft and often mesh with the central driver gear that is connected on the steering shaft, two its inner side surfaces of axially movable steering gear that are connected the steering shaft both sides have shaggy tooth, the convex and concave teeth of the shaggy tooth of steering gear and central driver gear bi-side matches and constitutes castellated steering clutch, two that are connected on left box body and the right case turn to pull-fork assembly to be connected with two steering gears respectively, and the outside of two steering gears is respectively equipped with and turns to spring;

(3), described two semiaxis are connected on two semiaxis housings by bearing, and two semiaxis housings are connected on left box body and the right case, actuation gear is contained in uses the locking nut axial limiting on the semiaxis, two reduction gear that are installed on two deboost axles mesh with two steering gears and two actuation gears respectively.

The utility model adopts technique scheme, and 1, the transmission efficiency height.It is the level Four transmission through steering gear, reduction gear, actuation gear by mainshaft gear, II shaftgear, central driver gear again that the utility model is imported power with clutch, just can drive drive wheel works, and speed is single, and drive path is short, the transmission efficiency height.2, gearbox designs is simple.Because in actuating unit, cancelled speed change gear, and the terminal double reduction that adopts, so simple in structure, velocity ratio distributes rationally, turns to reliable.3, technology capability is good.The casing of gearbox of the present utility model adopts the split type casing, and adopts hollow setting sleeve that casing is positioned, and the positioning pin hole that is arranged in the casing is the step type pin-and-hole, the double as bolt connecting hole, so technology capability is simple, reasonable.4, transmission stability is good.The utility model adopts welded flange formula semiaxis, semiaxis to use the axle head locking nut to fix with the actuation gear assembling, has improved the stable working and the bearing capacity of parts.5, operation is light, wearing and tearing are little.Owing to turn to the forward rollers of pull-fork assembly can to roll relatively with the fitting surface of steering gear, steering operation is laborsaving, uses reliable.6, quality of lubrication oil is stable.Because supporting magnet purge cock can adsorb the impurity such as iron filings that produced in the work in the gearbox casing, guarantees quality of lubrication oil stability.The utility model is simple in structure, and speed is single, and is durable in use, operates lightly, and usage requirement is low, and the paddy field applicability is good.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Fig. 1 is a sectional structure schematic representation of the present utility model.

Fig. 2 is a side-looking structural representation of the present utility model.

Wherein: 1-left box body, 1-1-positioning pin hole, 2-magnetic purge cock, the hollow setting sleeve of 3-, the 4-pad, 5-right case, 5-1-positioning pin hole, 6-locking nut, the 7-differential gear, 8-fastening piece, 9-bearing, 10-semiaxis housing, 11-semiaxis, 12-bearing, the 13-deboost axle, the 14-reduction gear, 15-turns to spring, the 16-clutch pulley, 17-main shaft, 18-spindle bearing, the 19-mainshaft gear, 20-bearing, 21-mainshaft bearing cap, the 22-II shaftgear, 23-bearing, 24-II axle, the 25-central driver gear, 26-steering gear, 26-1-fork slot, the 27-bearing, the 28-steering shaft, 29-turns to pull-fork assembly; The 29-1-roller, 29-2-shift fork soldering member; 30-shift fork bearing.

Embodiment

As shown in Figure 1, simple type hand tractor gearbox of the present utility model, comprise the split type casing, be connected to main shaft 17, II axle 24, steering shaft 28, deboost axle 13 and two semiaxis 11 on the casing 1 in turn and be connected mainshaft gear 19 on the main shaft 17, the II shaftgear 22 on the II axle 24, the central driver gear 25 on the steering shaft 28 and two steering gears 26, deboost axle 13 on duplicate gear 14 and the parts such as differential gear 7 on the semiaxis 11.

Casing of the present utility model is the split type housing structure, is connected and composed by hollow setting sleeve 3 and fastening piece 8 by left box body 1 and right case 5, is provided with pad 4 between left box body 1 and the right case 5.Accurately locate for making left box body 1 and right case 5, two positioning pin hole 1-1 and 1-5 are set on left box body 1 and right case 5, the hollow setting sleeve 3 of corresponding load, this hollow setting sleeve 3 is coaxial to be arranged in positioning pin hole 1-1, the 5-1 of left box body 1 and right case 5, and positioning pin hole 1-1 and positioning pin hole 5-1 are the step type pin-and-hole, are connected with fastening piece 8 after hollow setting sleeve 3 is installed in left box body 1 and right case 5.

See shown in Figure 1, mainshaft bearing cap 21 and spindle bearing 18 are connected in the outer side surface of left box body 1 and right case 5 respectively by bolt, main shaft 17 is connected on mainshaft bearing cap 21 and the spindle bearing 18 by bearing 20, main shaft 17 outside cantilever ends are connected clutch pulley 16 with input power, and mainshaft gear 19 is connected on the main shaft 17.And the two ends of II axle 24 are distinguished on load left box body 1 and the right case 5, and seal with seal ring, and II shaftgear 22 is installed on the II axle 24 by two bearings 23, by the spacer axially locating.Steering shaft 28 is connected on left box body 1 and the right case 5 by bearing 27, and by being connected two bearings lid axial limiting on left box body 1 and the right case 5, two axially movable steering gears 26 of energy and central driver gear 25 are installed on the steering shaft 28, II shaftgear 22 often meshes with mainshaft gear 19 and central driver gear 25 respectively, the inner side surface of two steering gears 26 is provided with shaggy tooth, this shaggy tooth can be the three-pawl type structure, the convex and concave teeth of the shaggy tooth of steering gear 26 and central driver gear 25 bi-side is matched constitute castellated steering clutch, two that are connected on left box body 1 and the right case 5 turn to pull-fork assembly 29 to be connected with two steering gears 26 respectively, and the outside of two steering gears 26 is respectively equipped with and turns to spring 15, the steering gear 26 of either side can cut off power turning under pull-fork assembly 29 effect, makes tractor steering.See shown in Figure 1ly, deboost axle 13 is connected on left box body 1 and the right case 5 by bearing 12, and by semiaxis housing 10 axial limitings that are connected on left box body 1 and the right case 5, two duplex ratio wheels 14 location are installed on the deboost axle 13, and with steering gear 26 engagements.Two-semiaxle 11 is connected on the semiaxis housing 10 by bearing 9, and two-semiaxle housing 10 is connected on left box body 1 and the right case 5, differential gear 7 is contained in uses locking nut 6 axial limitings on the semiaxis 11, and often meshes with two duplex ratio wheels 14, comes jack shaft 11 work by double reduction.

As shown in Figure 1, 2, the pull-fork assembly 29 that turns to of the present utility model is made up of shift fork soldering member 29-2 and roller 29-1, roller 29-1 is sleeved on the shift fork pin of shift fork soldering member 29-2, turn to pull-fork assembly 29 to be installed in the side of left and right casing 1 and 5 respectively by shift fork bearing 30, roller 29-1 is installed in the fork slot 26-1 of steering gear 26, roller 29-1 can be rolled between the fitting surface in fork slot 26-1 relatively, thereby reduce the fretting wear in the steering component work, the operation resistance when reducing steering system work.

As shown in Figure 1, the bottom of left box body 1 of the present utility model or right case 5 is connected with magnetic purge cock 2, can adsorb the impurity such as iron filings that produce in the work in the gearbox casing, improves functional reliability.

During the utility model work, power reaches main shaft 17 by clutch pulley 16, through mainshaft gear 19, II shaftgear 22, central driver gear 25, the steering gear 26 that engages with central driver gear 25, duplex reduction gear 14, differential gear 7 engagements, with transmission of power to semiaxis 11, the drive driving wheel rotates, thereby realizes the progressive motion of hand tractor.When cruising, steering gear 26 is turning under the spring 15 elastic force effects, the engagement of the convex and concave teeth of shaggy tooth that it is inboard and central driver gear 25 bi-side; And when needing left and right turning to, manipulation turns to pull-fork assembly 29, make steering gear 26 to the side shifting of turning, be in separated state with central driver gear 25, cut off power, power then by with steering gear 26 transmissions of central driver gear 25 opposite sides engagements, be delivered on the semiaxis 11 through duplex reduction gear 14 and differential gear 7, make the driving wheel running of this side realize turning to.

Claims

1, a kind of simple type hand tractor gearbox, comprise casing and be connected main shaft (17), steering shaft (28), deboost axle (13), two semiaxis (11) on the casing and be connected the gear on each and be connected the parts such as bearing cap of casing both sides, it is characterized in that:

(1), described casing connects and composes the split type casing by left box body (1) and right case (5) by fastening piece, and is provided with corresponding hollow setting sleeve (3) at least in left box body (1) and (5) two attachment holes of right case;

(2), described mainshaft bearing cap (21) and spindle bearing (18) are connected in the outer side surface of left box body (1) and right case (5) respectively, main shaft (17) is connected on mainshaft bearing cap (21) and the spindle bearing (18) by bearing (20), II axle (24), steering shaft (28) and deboost axle (13) are connected on left box body (1) and the right case (5), be connected on the II axle (24) II shaftgear (22) respectively be connected on the main shaft (17) mainshaft gear (19) and with the normal engagement of central driver gear (25) that is connected on the steering shaft (28), its inner side surface of two axially movable steering gears (26) that is connected steering shaft (28) both sides has shaggy tooth, the convex and concave teeth of the shaggy tooth of steering gear (26) and central driver gear (25) bi-side matches and constitutes castellated steering clutch, two that are connected on left box body (1) and the right case (5) turn to pull-fork assembly (29) to be connected with two steering gears (26) respectively, and the outside of two steering gears (26) is respectively equipped with and turns to spring (15);

(3), described two semiaxis (11) are connected on the semiaxis housing (10) by bearing (9), and two semiaxis housings (10) are connected on left box body (1) and the right case (5), differential gear (7) is contained in semiaxis (11) and goes up with locking nut (6) axial limiting, and two reduction gear (14) that are installed on the deboost axle (13) mesh with two steering gears (26) and two differential gears (7) respectively.

2, simple type hand tractor gearbox according to claim 1, it is characterized in that: the described pull-fork assembly (29) that turns to is by shift fork soldering member (29-2) be connected its anterior roller (29-1) and form, roller (29-1) is arranged on turning in the fork slot (26-1) of steering gear (26), can roll relatively between the fitting surface.

3, simple type hand tractor gearbox according to claim 1, it is characterized in that: the location lockhole (1-1) of described left box body (1) and right case (5) and (5-1) for step type pin-and-hole, the hollow setting sleeve of the coaxial load of corresponding position (3) and fastening piece (8).

4, simple type hand tractor gearbox according to claim 1 is characterized in that: the bottom of described left box body (1) or right case (5) is connected with magnetic purge cock (2).