CN2299436Y - Geared tractor lifting frame - Google Patents

Abstract

The utility model relates to a gear transmission type tractor lifting frame, belonging to the agricultural machinery class. The utility model is composed of a drawing frame, a long beam, a suspender, a swing arm, and a swing arm shaft. The rear part of a tractor is provided with a fixing frame which is provided with a gear shaft and the swing arm shaft which is provided with a big gear; one end of the gear shaft is fixed with a big chain wheel and a drive mechanism which is composed of levers, the middle part is fixed with a small gear, and the other end is fixed with a bidirectional clutch; a lifting frame is lifted through the lever and gear transmission replacing the hydraulic transmission. The utility model has the characteristics of simple structure, low cost, and low failure rate.

Description

Gear driven type tractor crane

The utility model belongs to the agricultural machinery class.

At the tractor rear portion crane is housed, multiple farm machinery such as uncovering plough, Plough for making ridges, sower can be housed on crane carries out various farmland operations, general obtained application.The present crane that adopts on the tractor, be by with hinged traction frame, the long beam that is connected with the traction frame rear end of tractor, be hinged on two suspension rods and two swing arms and arm shaft on the long beam, promote the hydraulic gear composition of arm shaft rotation.The flexible arm shaft that makes of the oil cylinder of hydraulic gear rotates, and two swing arms and two suspension rods make long beam and traction frame carry out lifting, make the various farm machinery that are fixed on the long beam along with farmland operation is carried out in lifting in the field.The tractor crane of present this hydraulic driven has the cost height, the problem that fault is many.

The purpose of this utility model is: the tractor crane that the gear driven type that a kind of cost is low, fault is few is provided.

Technical measures of the present utility model are: with by the traction frame hinged with tractor, the long beam that is connected with the traction frame rear end, be hinged on the crane that two suspension rods on the long beam and two swing arms and arm shaft form and be the basis, adopt a support that is fixed on the tractor back upper place, on support, be supported with a gear shaft and arm shaft by a watt seat, the arm shaft middle part is fixed with a gear wheel, be fixed with a large toothed disk and by plate stem at gear shaft one end, the large toothed disk driving mechanism that handle and stay cord and latch are formed, gear shaft middle part is fixed with the pinion that a gear wheel with the arm shaft middle part meshes, at the gear shaft opposite side bidirectional clutch is housed, clutch is by the forward ratchet and the reverse ratchet that are fixed on the gear shaft, be fixed on the clutch housing on the support, the positive and negative pawl axis that be equipped with on housing top, fixing action bars is formed in the pawl axis outer end.

The detent mechanism that spring steel ball is formed is housed between inboard, action bars bottom and clutch housing.

Between traction frame central sill and long beam, be connected with a telescoping mechanism of forming by forward and reverse screw rod and barrel.

In order to make the farm machinery soft property of having buried, two elasticity suspension rods that suspension rods can adopt connecting rod, connecting rod cover and spring to form.

Crane of the present utility model, because adopting tommy bar and chain wheel and pinion is driving mechanism, make arm shaft and swing arm, suspension rod and long beam and traction frame lifting, can make the farm machinery that are fixed on the long beam, so simple in structure, low price, good effect that fault is few are arranged along with lifting.

Fig. 1 is a structural representation of the present utility model; Fig. 2 is an end view.

Fig. 3 is the structural representation of suspension rod.

Drawing explanation and embodiment are described below: the utility model adopts a support 4 that is fixed on the tractor back upper place, is supported with a gear shaft 1 and an arm shaft 13 by watt seat 11 (two pairs) on support 4.Seam has two swing arms 14 on the arm shaft 13, and the middle part is fixed with a canine tooth 16.Gear shaft 1 one ends are fixed with a large toothed disk 3, the tommy bar 2 of suit, handle 20 is equipped with in tommy bar 2 upper ends, handle 20 lower ends are connected with stay cord, the stay cord lower end connects latch, latch can insert in the tooth of large toothed disk 3, pulls tommy bar 2 gear shaft 1 is rotated, and so just makes tommy bar 2, handle 20 and stay cord and latch form large toothed disk 3 (being gear shaft 1)) transmission mechanism.Be fixed with a pinion 5 with gear wheel 16 engagements at arm shaft 13 middle parts at gear shaft 1 middle part, opposite side at gear shaft 1 is equipped with a bidirectional clutch, clutch is by the forward ratchet and the reverse ratchet 6 that are fixed on the gear shaft 1, be fixed on the clutch housing 8 on the support 4, forward and reverse ratchet axle 7 that be equipped with on housing 8 tops, 9 is the forward ratchet on the axle, fixing action bars 10 is formed in pawl axis 7 outer ends, pulling action bars 10 can make pawl axis 7 rotate, when the forward ratchet 9 on the pawl axis 7 withstands on the forward ratchet, make forward ratchet and the gear shaft can not forward rotation, if when making on the contrary reverse ratchet on the pawl axis 7 withstand on the reverse ratchet 6, make reverse ratchet 6 and the gear shaft 1 can not backward rotation, so just need action bars 10 that three locus are arranged, i.e. forward braking, the neutral position, plugging.Three above-mentioned positions are to realize by the detent mechanism that the spring steel ball 12 that is equipped with between inboard, action bars 10 bottoms and the clutch housing 8 is formed.If long beam 17 rotates an angle a little in the space, will produce very big influence to the operation quality of farm machinery.In order to make the adjustable angle of long beam, the utility model is connected with a telescoping mechanism of being made up of forward and reverse screw rod and barrel 18 between the central sill of traction frame 21 and long beam 17, forward is twisted barrel 18, and forward and reverse screw rod is shunk, and reduces the angle of penetration of farm machinery 19.In order to make farm machinery 19 that soft property be arranged when burying and work, two suspension rods 15 can adopt the elasticity suspension rod of being made up of connecting rod 22, connecting rod cover 24 and spring 23.This crane of the present utility model mainly is applicable to the use on the tractor with small four wheels.

Claims (4)

1, a kind of gear driven type tractor crane, be by with the hinged traction frame of tractor, with the long beam that the traction frame rear end is connected, be hinged on that two suspension rods on the long beam and two swing arms and arm shaft form, it is characterized in that:

A, a support that is fixed on the tractor back upper place is arranged, be supported with a gear shaft and arm shaft by a watt seat on frame, the arm shaft middle part is fixed with a gear wheel;

B, the large toothed disk driving mechanism that is fixed with a large toothed disk and forms at gear shaft one end by tommy bar, handle and stay cord and latch, gear shaft middle part is fixed with the pinion that a gear wheel with the arm shaft middle part meshes, at the gear shaft opposite side bidirectional clutch is housed, clutch be by be fixed on the gear shaft the forward ratchet and oppositely ratchet, be fixed on the clutch housing on the support, forward and reverse pawl axis that be equipped with on housing top, the fixing action bars in pawl axis outer end is formed.

2, by the described crane of claim 1, it is characterized in that: the detent mechanism that spring steel ball is formed is housed between inboard, action bars bottom and clutch housing.

3, by claim 1 or 2 described cranes, it is characterized in that: between traction frame central sill and long beam, be connected with a telescoping mechanism of forming by forward and reverse screw rod and barrel.

4, by claim 1 or 2 or 3 described cranes, it is characterized in that: two elasticity suspension rods that suspension rod is made up of connecting rod, connecting rod cover and spring.

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