CN100485217C - Directional running transmission gear of wheel-type tractor - Google Patents

Abstract

A steering device of wheel tractor comprises a frame, a middle gear, a cover, a large abrasion-reducing pad, a steering input axle, a wide gear, an abrasion-reducing pad, a middle axle, an output gear, a sliding tooth sheath, and a locking plate, or the like. The invention is mounted at the back end of speed-variable box, and in the frame of back bridge. The invention moves the sliding tooth sheath left and right to change the forward shift to backward shift, or reversed, and transmits large torque. And when the backward shift is eliminated, the invention can be used as shuttle shift, to obtain same backward number with the forward number.

Description

Directional running transmission gear of wheel-type tractor

(1) technical field

The invention belongs to the tractor field, relate to a kind of directional running transmission gear of wheel-type tractor.

(2) background technique

At present, on each power section wheeled tractor of Sheng Chaning, all designed reverse gear in the transmission device at home, hung up reverse gear, tractor can travel backward.Because reverse gear generally just is used for carrying out the farm implements warehouse-in etc. that articulates and move backward, thus all design comparatively simple, margin of safety is less.Tractor is provided with 2～4 reverse gears usually, and the highest reverse speed is seldom above 13 kilometers/hour.In recent years, to carry out unit operation more and more along with tractor is joined ensiling cropper and paddy rice herbage windrower, and this kind operation is for guaranteeing the good visual field, and tractor need drive capable operation into.At this moment, reverse gear becomes normal work shelves, and the drawback of former design reverse gear begins to come out, and the one, the reverse gear gear is few, and the ensiling cropper of coupling and paddy rice herbage windrower require tractor that more work gear is arranged.The 2nd, the strength deficiency of reverse gear can't bear long-time on-load and open operation.The way that external tractor solves this operating mode is that the fusiformis shelves are set in gear box of tractor, articulate the fusiformis shelves after tractor can obtain with the as many backward gear number of forward gears and with advancing the same speed that falls back.But the present most of tractor transmission devices of China do not possess the condition that the fusiformis shelves are set in gearbox.

(3) summary of the invention

The object of the present invention is to provide a kind of directional running transmission gear of wheel-type tractor, make the forward gears of tractor can become backward gear, backward gear can be changed into forward gears, simultaneously can transfer larger torque, and make things convenient for tractor to carry out bidirectional driving or open operation.In addition, when tractor cancellation reverse gear, it can be used as the fusiformis shelves, and tractor is had with the same reverse gear number of forward gears.

Technological scheme of the present invention is: directional running transmission gear of wheel-type tractor mainly comprises commutator housing, intermediate gear, commutator head, big anti-attrition pad, commutation input shaft, transition gear, anti-attrition pad, jack shaft, output gear, sliding gear collar, lockplate.The commutator housing is installed on the gear box of tractor ear end face by bolt and locating stud; Commutator head is fixed together with the commutator housing by setting sleeve and bolt; Commutation input shaft one end inserts in the gearbox, and the other end has the outer spline that connects, and can engage with the interior connection spline of sliding gear collar.Have gear on the commutation input shaft, this gear meshes with three intermediate gears that are uniformly distributed along the circumference simultaneously, and three intermediate gears are respectively with three transition gears engagements that are uniformly distributed along the circumference equally; Jack shaft is the six roots of sensation altogether, and an end all is processed with breach, and the breach end is supported on the commutator head, and the other end is supported on the commutator housing, and three intermediate gears are enclosed within on the different jack shafts by needle bearing with three transition gears.The anti-attrition pad is installed at intermediate gear and transition gear two ends respectively, is processed with oilhole on the jack shaft.Lockplate is fixed by bolts on the commutator head and blocks two adjacent jack shaft breach simultaneously; Output gear is installed on the commutator head by big anti-attrition pad and circlip, simultaneously with three transition gear engagements.Output gear is a hollow-core construction, and an end is processed with gear, and the other end is processed built-in connection spline, can engage with the outer connection spline of sliding gear collar.On the back axle small coning gear shaft, an end is processed with the inside and outside spline that connects to sliding gear collar by spline package, and the other end has allocating slot, and external force can make sliding gear collar move left and right on the back axle small coning gear shaft by allocating slot; In addition, for adjusting the commutation speed ratio, transition gear also can be designed to duplicate gear during design.

The present invention can reach following beneficial effect: whole device is installed on the gear box of tractor ear end face, and gos deep in the rear axle housing body, has made full use of the middle space of gear box of tractor and back axle, does not need to increase in addition the tractor axial dimension.Simultaneously, because whole device only is installed on the gear box of tractor ear end face, except that changing output shaft of gear-box, do not change the interior gear of gearbox, axle etc.Therefore only need on the gear box casing ear end face, to process in advance the corresponding bolts hole, just can be according to convenient at any time this reverse drive gear of installing of user's needs.The input gear of whole device is simultaneously with three intermediate gears engagements in addition, and output gear is simultaneously with three transition gears engagements, and similar Gear Planet Transmission can transfer larger torque, and whole device size is less simultaneously.Adopt the interior collar shift of the similar gearbox of gear changing mode of sliding gear collar, can on sliding gear collar and phase accessory thereof, take anti-measure out of supply, guarantee that gear shift is light reliable.Jack shaft adopts breach, the fixing mode of lockplate, can prevent that jack shaft from moving axially, and can prevent its rotation again.The anti-attrition pad is installed in intermediate gear and the transition gear both sides can prevent gear and casing friction.Transition gear can be designed to duplicate gear in addition, makes it have the different numbers of teeth during design, can adjust the commutation speed ratio.

(4) description of drawings

Fig. 1 is the commutate sectional view of running transmission gear of the present invention.

Fig. 2 is the present invention's running transmission gear arrangement of gears schematic representation that commutates.

Fig. 3 is the present invention's running transmission gear right side partial view that commutates.

(5) embodiment

Mainly comprise commutator housing 1, intermediate gear 2, commutator head 3, big anti-attrition pad 4, commutation input shaft 5, transition gear 6, anti-attrition pad 7, jack shaft 8, output gear 9, sliding gear collar 10, lockplate 11 as Fig. 1, Fig. 2, directional running transmission gear of wheel-type tractor shown in Figure 3, pulling down output shaft of gear-box during assembling changes the outfit and is commutation input shaft 5, use locating stud and bolt that commutator housing 1 is installed on the gear box casing ear end face, commutator head 3 tightens together with commutator housing 1 by setting sleeve and bolt.Gear on the commutation input shaft 5 is meshed with three intermediate gears 2 simultaneously, six roots of sensation jack shaft 8 is supported on respectively on commutator housing 1 and the commutator head 3, three intermediate gears 2 and three transition gears 6 are sleeved on the six roots of sensation jack shaft 8 by needle bearing respectively, anti-attrition pad 7 is installed in intermediate gear 2 and transition gear 6 two ends, and three intermediate gears 2 are meshed with three transition gears 6 respectively.Output gear 9 is installed on the commutator head 3 by big anti-attrition pad 4 and circlip, and meshes with three transition gears 6 simultaneously.Lockplate 11 is fixed by bolts on the commutator head 3 and blocks two adjacent jack shafts 8 simultaneously.Sliding gear collar 10 is installed on the back axle small coning gear shaft.

Commutation states: the driver uses operating mechanism to stir sliding gear collar 10 it is moved right, make the outer connection spline of sliding gear collar 10 engage with the interior connection spline of output gear 9, this moment, the gear of output torque on commutation input shaft 5 of gearbox was delivered on three intermediate gears 2 simultaneously, be delivered on three transition gears 6 by three intermediate gears 2 again, be delivered to output gear 9 by three transition gears 6 at last and be delivered on the back axle small coning gear shaft through sliding gear collar 10 again.Power has passed through commutation input shaft 5 and has cogged and intermediate gear 2, intermediate gear 2 and transition gear 6, transition gear 6 and the output gear 9 secondary transmission of tertiary gear altogether, makes that the sense of rotation of back axle small coning gear shaft is opposite with the sense of rotation of commutation input shaft 5.At this moment, the former forward gears of gear box of tractor becomes backward gear, and former backward gear becomes forward gears.

Commutation states not: the driver uses operating mechanism to stir sliding gear collar 10 it is moved to the left, make the same outer connection spline that commutates input shaft 5 of interior connection spline of sliding gear collar 10 engage, the output torque of gearbox directly is delivered on the back axle small coning gear shaft by commutation input shaft 5 by sliding gear collar 10, and commutation input shaft 5 and back axle small coning gear shaft rotate in the same way.The forward gears of tractor still is a forward gears, and backward gear still is a backward gear.This moment, intermediate gear 2, transition gear 6 and the output gear 9 of reverse drive gear all kept idle running.

The fusiformis shelves: if the reverse gear cancellation in the gear box of tractor, tractor has only forward gears when the commutation running transmission gear is in not commutation states.When tractor need fall back, switch the commutation running transmission gear to commutation states, then tractor obtains and the as many reverse gear of forward gears number.

Claims (3)

1. a directional running transmission gear of wheel-type tractor mainly comprises commutator housing (1), intermediate gear (2), commutator head (3), big anti-attrition pad (4), commutation input shaft (5), transition gear (6), anti-attrition pad (7), jack shaft (8), output gear (9), sliding gear collar (10), lockplate (11), it is characterized in that: commutator housing (1) is installed on the gear box of tractor ear end face by bolt and locating stud, commutator head (3) is fixed together with commutator housing (1) by setting sleeve and bolt, commutation input shaft (5) one ends insert in the gearbox, the other end has the outer spline that connects, and interior connection spline that can same sliding gear collar (10) engages; Have gear on the commutation input shaft (5), this gear meshes with three intermediate gears that are uniformly distributed along the circumference (2) simultaneously, and three intermediate gears (2) are respectively with three transition gears that are uniformly distributed along the circumference equally (6) engagement; Jack shaft (8) is the six roots of sensation altogether, and an end is processed with breach, and the breach end is supported on the commutator head (3), and the other end is supported on the commutator housing (1), and three intermediate gears (2) are enclosed within on the different jack shaft (8) by needle bearing with three transition gears (6); Lockplate (11) is fixed by bolts to commutator head (3) and goes up and block simultaneously adjacent two jack shafts (8); Output gear (9) is a hollow-core construction, and an end is processed with gear, and the other end is processed built-in connection spline, and outer connection spline that can same sliding gear collar (10) engages; Output gear (9) is installed on the commutator head (3) by big anti-attrition pad (4) and circlip, and meshes with three transition gears (6) simultaneously.

2. directional running transmission gear of wheel-type tractor according to claim 1 is characterized in that: connect spline and the outer spline that connects in sliding gear collar (10) one ends are processed with respectively, the other end has allocating slot; Sliding gear collar (10) by spline package on the back axle small coning gear shaft, but move left and right under external force.

3. directional running transmission gear of wheel-type tractor according to claim 1 is characterized in that: for adjusting the commutation speed ratio, transition gear (6) can be designed to duplicate gear during design.

Images