CN2185500Y

CN2185500Y - Automatic lifting device of small size tractor

Info

Publication number: CN2185500Y
Application number: CN 93242042
Authority: CN
Inventors: 金斗哲
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-10-18
Filing date: 1993-10-18
Publication date: 1994-12-21
Anticipated expiration: 2003-10-18

Abstract

The utility model relates to an automatic lifting device for miniature tractors, which is a hanging control mechanism arranged between the tractor and the agricultural tool. The utility model solves the problems that the miniature tractor can not carry various agricultural tools to carry out the field operation because of no hanging control mechanism. The utility model is composed of a transmission case, a lifting screw rod, a pull rod, a lever shaft, a fixing bracket, a central pull rod, a hanging bracket, etc. The utility model is suitable for the field operation carried out in rice field or in arid field such as land plowing, land preparation, sowing, reaping, etc. by the common hand tractors and small four wheel tractors in rural areas. The utility model has the advantages of automatic operation, flexible operation, convenient operation, increased productivity and reduced labor intensity.

Description

Automatic lifting device of small size tractor

The utility model belongs to the agricultural machinery apparatus, especially relates to the suspension controlling organization between small tractor and the farm implements.

At present, agricultural tractor with small four wheels and hand tractor have become the major impetus machinery of operations such as the farmland, rural area is intertilled, rakes the soil level, sowed, harvesting.But, up to the present, small tractor can't be played one's part to the full, on many farmland operations to making this class machine very low in the availability of farm work owing to lack multi-functional hitch.

The purpose of this utility model is a kind of multi-functional hitch of invention, makes it can be supporting with small tractor, is adapted to the suspension of farm implements such as field sowing, intertillage, whole ground.Give full play to the function of the farmland several work of small tractor.

Primary structure of the present utility model is made up of transmission case, elevating screw and pull bar, lever shaft, fixed mount, central tie rod, hanger bracket.Cardinal principle is to be rotated by the transmission case that belt pulley drives this lifter by tractor motive power output shaft, transmission case drives screw on the leading screw by elevating screw output, the lever shaft that former moving clamping plate on the screw drive on fixing rotates, and by the pulling of the traction splint on lever shaft central tie rod, the suspension bracket of transferring on the hanger bracket hangs and the job state of adjusting farm implements automatically to reach with the adjustment of the angle of drive hanging beam.

The utility model has the advantages that hand tractor that this lifter is applicable to that the rural area is commonly used and tractor with small four wheels etc., no matter Plain or mountain area, collective, the paddy field on self-employed farmer and farm, dry land, do not choose and sow around steel wire rope, not choosing follows the plough just can rake the soil level, the level land, kind, plough etc., can utilize multi-functional lift clutch dozer to be installed for various tractor parts in addition, crane, tipping buckets etc. are leveled land for agricultural, doing transportation produces, especially small tractor is realized automation, enhance productivity, fuel saving is saved the labour, and effect is more remarkable.The utility model also has that volume is little, in light weight, simple structure, easy-maintaining, characteristics such as practical flexible, easy to operate, widely applicable.

Below in conjunction with accompanying drawing embodiment of the present utility model is described:

Fig. 1 the utility model schematic diagram

Fig. 2 gearbox designs figure

The automatic control section vertical view of Fig. 3

The automatic control section end view of Fig. 4

See Fig. 1 by the belt pulley 1(on the tractor motive power output shaft) be with the belt pulley (23) that passes on the rotating box (2), in transmission case (2), realize forward and reverse rotation of the driven shaft (22) of transmission case by the conversion of gear.Driven shaft drives the rotation of elevating screw (17) and the screw assembly (5) on the drive elevating screw is done back and forth movement thereupon.On the little axle (28) of screw assembly (5) both sides former moving clamping plate (4) are housed and link to each other with lever shaft (7), screw assembly (5) moves through former moving clamping plate (4) and drives rotation in the bush seat (9) of lever shaft (7) on fixed mount (10).Thereby drive the swing that is fixed on the traction splint on the lever shaft (7), and the suspension bracket (12) that promotes and spur on the hanger bracket (15) by central tie rod (11) moves, thereby realize driving the rotation of square draw beam (13) in movable sleeve (14) of joining with suspension bracket (12), driven the farm machinery lifting of joining, thereby realized directly controlling the state of farm machinery in farm work by tractor driver with draw beam (13).

Fixed mount (10) is to be fixed on the tractor rear axle.Draw hook on the hanger bracket (16) joins with the hitch frame of tractor.The direction that determines this lifter lifting is relevant with screw assembly (5) travel direction, and its control mode is the direction that changes the rotation of transmission case (2) driven shaft (22).Its rotational structure of (see figure 2) is as follows: when belt pulley (23) drives driving shaft (19) rotation, and slip cap (20) on driving shaft (19) and rotation thereupon.Sliding sleeve can be halved together with former and later two driving gears (18), when driving the perpendicular driven gear that joins (21) when being halved together, slip cap (20) and the driving gear in front (18) clockwise rotate, the driven shaft (22) that links to each other with driven gear (21) also rotates thereupon in the same way, otherwise, when slip cap (20) and the driving gear in back (18) when being halved together, just drive driven gear (21) and rotate counterclockwise, its driven shaft (22) also just rotates thereupon in the same way.Thereby realized the action of the lifting of lifter.

Its automatic control section of the lifting angle of this lifter by spacing control stick (26), stop nut (6) and with the screw assembly be that slip cap (20) on the spacing handlebar (29), lifting lever (25), the interior declutch shift shaft of transmission case (2) (24), shift fork (27), driving shaft (19) of one is formed (see figure 4).Before operation, the stop nut (6) on the control stick (26) is adjusted to preposition.Drive screw assembly (5) and seesaw when driven shaft (22) drives elevating screw (17) thereby rotates.With screw assembly (5) is spacing handlebar (29) slip synchronously on spacing control stick (26) of one.Drive whole spacing control stick (26) when locating and move forwards or backwards when spacing handlebar (29) slides into stop nut (6) forward or backward, spacing control stick (26) drives declutch shift shaft (24) in the transmission case (2) by connected lifting lever (25) again and makes left and right slip (see figure 3) declutch shift shaft (24) and drive shift fork (27) and also drive slip cap (20) on the driving shaft (19) thereupon and do and be synchronized with the movement, thereby impel slip cap (20) to withdraw from the driving gear (18) that is driven, make transmission case be in idling conditions.The running of above mechanism has realized the function of the spacing lifting of this lifter.

In addition, the operation of this lifter be provided with on the top of transmission case (2) one with shift fork (27) handle that rises and falls that joins, conversion by gear is with the left and right slip of shift fork (27) on the control declutch shift shaft (24), drive in the driving gear (18) of slip cap (a 20) embedding left side or right part, to realize the elevating movement of this lifter, (neutral) shift fork (27) drives the position that slip cap (20) mediates and dallies when the handle that rises and falls mediates, and promptly this lifter stops elevating movement.

Claims

1, the multi-functional lift clutch of small tractor is made up of transmission case, elevating screw, pull bar, lever shaft, fixed mount, central tie rod, hanger bracket etc., it is characterized in that:

A: the power take-off of tractor joins by belt pulley (1) and (23) and transmission case (2);

B: the driven shaft (22) of transmission case (2) drives elevating screw (17), is equipped with screw assembly (5) on leading screw (17), on the little axle (28) of the both sides of screw assembly (5) former moving clamping plate (4) is housed and links to each other with lever shaft (7);

C: lever shaft (7) is in fixed mount (10) top bearing shell seat (9), and the traction splint (8) that is fixed on the lever shaft (7) joins by the suspension bracket (12) on central tie rod (11) and the hanger bracket (15);

D: the square draw beam (13) that joins with suspension bracket (12) is in movable sleeve (14), and the draw hook (16) on the hanger bracket (15) joins with the hitch frame of tractor;

E: the belt pulley (23) on the transmission case (2) joins with driving shaft (19), slip cap (20) is arranged on driving shaft (19), slip cap (20) can be halved together with former and later two driving gears (18), driving gear (18) and driven gear (21) vertical connection, driven gear (21) joins with driven shaft (22);

F: be provided with on the top of transmission case (2) one with shift fork (27) handle that rises and falls that joins.

2, multifunctional lifting device according to claim 1, it is characterized in that: the automatic control section of lifter lifting angle by spacing control stick (26) and top stop nut (6) thereof, and and form for the spacing handlebar (29) of one with screw assembly (5), spacing control stick (26) links by the interior declutch shift shaft (24) of connected lifting lever (25) and transmission case (2), declutch shift shaft (24) drives shift fork (27), and the slip cap (20) on shift fork (27) and the driving shaft (19) joins.