CN2313360Y

CN2313360Y - Blades for rotary cultivator

Info

Publication number: CN2313360Y
Application number: CN 97249956
Authority: CN
Inventors: 梁德礼; 杨永新; 崔连兴
Original assignee: JIANGONG METAL PRODUCTS FACTORY HEGANG CITY
Current assignee: JIANGONG METAL PRODUCTS FACTORY HEGANG CITY
Priority date: 1997-11-24
Filing date: 1997-11-24
Publication date: 1999-04-14
Anticipated expiration: 2007-11-24

Abstract

The utility model relates to working parts of a rotary cultivator belonging to farm machinery. Rear edges form polygonal line-shaped knife backs, arc-shaped cutting edges used for cutting soils are formed by side-cutting edges and positive-cutting edges arranged on knife bodies with identical thickness, and the rear edges are connected with the positive-cutting edges along straight lines to form knifepoints. The utility model has the advantages of simple structure; besides, when the utility model tills a field, the friction resistance between rotary tillage blades and soils is small, and tillage width is widened; at the same time, the energy consumption of the utility model is low.

Description

Blades for rotary cultivator

The utility model relates to the workpiece that rotovator is used in a kind of agricultural machinery, particularly relates to a kind of Blades for rotary cultivator.

At present, the rotovator that China is agricultural, rotary tillage or stubble-cleaning generally use the curved or right tilling blade sheet in a left side, its thickness is the 3.5-10 millimeter, yet above-mentioned blade is thicker, rolled steel dosage is big, the cost of manufacture height, and resistance is bigger during rotary tillage, power consumption is big, Chinese patent is in " non-irrigated in the contrary Rotary tillage blade of cutting " of bulletin on April 6th, 1994, and the contrary Rotary tillage blade of cutting of a kind of dry land of the utility model mainly is made up of knife bar and positive tangent plane, and the knife bar rear end is a tool rest, there is the side cutting blade knife bar front portion, side cutting blade below is set with the positive tangent plane with the knife bar lateral vertical, and positive tangent plane is formed by arc surface and cutter plane, and the cutter planar front portion is the sharpening plane, the sharpening flat front end is a major cutting edge, be fit to the contrary rotovator of cutting of dry land and use, can reduce power consumption, increase tilth.Yet, be that frictional resistance is big equally during this patent rotary tillage, its manufacture craft is comparatively complicated, and the integrated cost height is difficult for implementing.

It is a kind of simple in structure that the purpose of this utility model is to provide, easily processing, and during the rotary tillage operation, the less Blades for rotary cultivator of frictional resistance between Rotary tillage blade and the soil.

In order to achieve the above object, the utility model adopts the identical Rotary tillage blade of a kind of cutter hub thickness, it is to constitute the broken line shape knife back by trailing edge and trailing edge, and the positive cutting blade on the same thickness cutter hub, side cutting blade form the cutting edge of arc milling soil, and being joined along straight line with positive cutting blade by trailing edge constitutes point of a knife.

The utility model has the advantages that:

(1) simple in structure, easily processing, integrated cost is low;

(2) during the rotary tillage operation, frictional resistance is little between Rotary tillage blade and the soil, and working width is big simultaneously, and operating efficiency provides 2-4 doubly;

(3) Blades for rotary cultivator when the rotary tillage operation, in case when meeting barrier such as finger stone or tree root, the utility model Blades for rotary cultivator can be moved certainly and be allowed, prevents that effectively the blade phenomenon that fractures from taking place;

(4) the utility model adopts the cutter hub consistency of thickness, thus when the rotary tillage operation, blade cutting edge energy self sharpening, thereby rotary tillage is speeded up.

Description of drawings:

Fig. 1 is the utility model vane body schematic diagram;

Fig. 2 is the end view of Fig. 1.

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

By Fig. 1～Fig. 2 as can be known, the utility model is to constitute the broken line shape knife back by trailing edge 1 and trailing edge 2, and the positive cutting blade 3 on the same thickness cutter hub, side cutting blade 4 form the cutting edge 5 of arc milling soil, and being joined along straight line with positive cutting blade 3 by trailing edge 2 constitutes point of a knife 6.

Positive cutting blade 3 on the described cutter hub, side cutting blade 4, point of a knife 6, trailing edge 1, trailing edge 2 thickness are identical, and its thickness is the 1.8-2.5 millimeter.

The length of described trailing edge 1 is 120-150mm, and the length of trailing edge 2 is sin (30～90 °) (50～120) mm.

Angle α is 30～90 ° between described trailing edge 1 and the trailing edge 2

The utility model adopts the cold working of 1.8-2.5 millimeters thick manganese steel plate blanking, promptly can be made into through thermal treatment again, the length of cutter hub is the 150-240 millimeter, width is 80 millimeters, the utility model trailing edge 1 length is the 120-150 millimeter, trailing edge 2 length are sin (30～50 °) .50 millimeter, are Blades for rotary cultivator.Trailing edge 2 length of the present utility model are 120 millimeters of sin (50～90 °), can be used for the stubble-cleaning blade.

The utility model cutter hub does not put the first edge on a knife or a pair of scissors, cutter hub thickness uniformity, and when the rotary tillage operation, sharpening voluntarily, the utility model adopts 1.8 millimeters, 2.0 millimeters and 2.5 millimeters manganese plate processing and fabricatings of manganese steel plate.

The utility model is because blade thickness is little, then under same cutting force effect, big person compares with blade thickness, cutter is big to the pressure of soil, because the thickness of blade is little, the soil that is cut is little perpendicular to the deflection on the direction of knife face (back and front) again, then soil is little to the normal pressure of knife face, the frictional force of knife face and soil is just little, and this is similar to spade and cuts the earth, and the blade work resistance bigger than existing thickness reduces many.In use, cutting edge (positive cutting blade 3 and side cutting blade 4) is worn down to the cross section and becomes the garden arc, because blade thickness is little, then cutting edge is sharp state all the time, and the function of self sharpening is arranged.Again because the thickness of blade is little, and then cutter has certain elasticity, when cutting soil met the hard thing of difficult cutting such as finger stone etc., cutter can elasticity of flexure distortion, has reduced fractureing of cutter.Because be that sheet metal is made, profile is simple, to make easily, weight is also light than existing, and cost is lower.

Working resistance when cutting soil in order further to reduce blade, in the design of rotovator, the amount of feeding of blade cut soil is diminished, existing rotovator (the cutter shaft horizontal) 10 to 12 centimetres of the amount of feeding when the general cultivated land of dry farming, the utility model rotovator is then used about 4 centimetres of the amount of feeding, and method is the quantity that suitably strengthens blade axis rotary speed and increase same milling face inner blade on the cutter shaft in the used with tractor bottom gear.Because the amount of feeding is little, the thickness of the Tu Fa that is cut is little, makes cutting force little, and the length that 4 cuttings of side cutting blade are buried is little, and this makes that also cutting force is littler.

As seen, adopt scheme of the present utility model, the working resistance of Rotary tillage blade reduces many, makes the tractor of same cutter power can drive the rotovator of wideer working width.Especially for example 12 or 15 horsepowers tractor rotovator is favourable to giving pocket knife power for this, the 2-4 that the working width of the rotovator of existing and fraction horsepower tractor approximately has only the tractor wheelspan doubly, during use, rotovator needs to put to a lateral deviation of tractor many, makes unit produce deflection moment.Adopt this programme, can make to the working width of the rotovator of fraction horsepower tractor width greater than the two-wheeled outer rim.Certainly, be used on the supporting Shi Gengji of large and middle tractor, working width is strengthened.

Claims

1, a kind of Blades for rotary cultivator, form by installing hole, it is characterized in that: constitute the broken line shape knife back by trailing edge (1) and trailing edge (2), positive cutting blade (3) on the same thickness cutter hub, side cutting blade (4) form the cutting edge (5) of arc milling soil, and being joined along straight line with positive cutting blade (3) by trailing edge (2) constitutes point of a knife (6).

2, according to the described Blades for rotary cultivator of claim 1, it is characterized in that: the positive cutting blade (3) on the cutter hub, side cutting blade (4), point of a knife (6), trailing edge (1), trailing edge (2) thickness are identical, and its thickness is the 1.8-2.5 millimeter.

3, according to the described Blades for rotary cultivator of claim 1, it is characterized in that: the length of trailing edge (1) is 120-150mm, and the length of trailing edge (2) is sin (30～90 °) (50～120) mm.

4, according to the described Blades for rotary cultivator of claim 1, it is characterized in that: angle α is 30～90 ° between trailing edge (1) and the trailing edge (2)