CN102511239A

CN102511239A - Grass chopper

Info

Publication number: CN102511239A
Application number: CN201110414260XA
Authority: CN
Inventors: 王仲章
Original assignee: WUXI FUERWO BOARD INDUSTRY MACHINERY Co Ltd
Current assignee: WUXI FUERWO BOARD INDUSTRY MACHINERY Co Ltd
Priority date: 2011-12-13
Filing date: 2011-12-13
Publication date: 2012-06-27

Abstract

The invention discloses a grass chopper which is arranged at a straw discharge port of a harvester. Movable blades fixed on a rotating center shaft and fixed blades fixed on a rack are arranged in a staggered mode. The center shaft is a hexagonal axis. The movable blades are rhombus blades. The fixed blades are in a U shape. Cutting edges are arranged on two arms. Fixed through holes are arranged at the joints. According to the invention, the rhombus blades and the U-shaped fixed blades have simple structures and are convenient and rapid to install; and under the action of barrier of an upper guide plate and a lower guide plate, short grasses and impurities, which are discharged from a vibrating screen below a main roller, directly fall on the harvested field without entering the grass chopper, so that about 5 percent to 10 percent of chopped grasses entering the grass chopper are reduced, the workload is reduced and the power consumption is effectively reduced.

Description

Grass chopper

Technical field

The present invention relates to the agricultural equipment field, especially a kind of grass chopper that is applicable to full feeding longitudinal axis stream grain header.

Background technology

Full feeding longitudinal axis stream grain header is compared with the transverse-axis-flow grain header, has good, the advantages such as productivity ratio is high, low cost of manufacture of adaptability, is accepted by users in recent years, develops very fast.But the same with the transverse-axis-flow grain header, the grass that longitudinal axis stream is discharged is long, even forms the plait strip, does not reach the requirement of straw-returning, and the peasant burns because of handling, the environment of not only having wasted stalk resource but also severe contamination.For the harvesting farmland that has broken grass to require, existing full feeding longitudinal axis stream grain header is mounted with grass chopper at fuselage afterbody, referring to Fig. 1; The master rotor 20 of grain header 21 is transported to fuselage afterbody with the stalk after the threshing, and master rotor 20 bottoms are provided with screen cloth, grain, short grass and assorted surplusly drop on the vibratory sieve 19 of bottom through sieve aperture; Under the grading of vibration; Grain falls into the paddy case of bottom, and short grass and the assorted surplus also discharge from the rear portion get into grass chopper and pulverize together.Existing grass chopper, moving knife and stationary knife are installed in earlier on the knife rest, and the knife rest of moving knife is welded on the axis, and the knife rest of stationary knife is installed on the casing, and each moving knife and stationary knife all are that complex structure independently is installed; And behind the moving knife axis welding moving knife knife rest, will inevitably produce amount of unbalance, therefore running must be done dynamic balancing under fast state.

Summary of the invention

Shortcomings such as the applicant is to above-mentioned existing grass chopper complex structure, and blade is easy to wear, and power consumption is big provide a kind of grass chopper of more reasonable structure, thereby have effectively reduced the amount of broken grass, have reduced wearing and tearing, and moving knife and stationary knife mounting structure are simple, convenient.

The technical scheme that the present invention adopted is following:

A kind of grass chopper is arranged on the stalk discharging opening of grain header, by the knife section that is fixed on rotary middle spindle be fixed on the arrangement that interlaces of ledger-plate on the frame, said central shaft is a hexagonal axis; Said knife section is a diamond shaped insert, is set on the hexagonal axis through the center hexagon ring, and adopts spacer to carry out the interval; Said stationary knife is " U " font, and two arms are provided with cutting edge, are provided with fixed via at connecting portion.

It is further characterized in that: the feeding mouth at the grass chopper top is provided with outward-dipping baffle upper plate and vertical chin spoiler; Baffle upper plate is connected with the discharging swash plate of grain header fuselage afterbody mutually, and the discharging opening of grain header fuselage afterbody is divided into two passages up and down.

Adjacent knife section is with the angle that interlaces of 60 degree.

Feeding mouth at the grass chopper top is provided with turnover dodge gate.

Beneficial effect of the present invention is following:

Rhombus knife section of the present invention directly is set on the hexagonal axis through central hexagon ring; And utilize spacer to carry out the interval, simple in structure, it is convenient to install; Greatly reduce in the prior art knife rest is welded on the axis, blade is installed in the workload that takes time and effort on the knife rest one by one through securing member.The U-shaped ledger-plate promptly can be fixed on the knife rest through two screws easily, and the cutting edge that is provided with on U-shaped two arms can accomplish the setting of two blades of the moving knife left and right sides simultaneously, stressed evenly rationally, simple in structure, mounting or dismounting are convenient.

The present invention is through being provided with grass chopper at longitudinal axis stream grain header rear portion; Under the deadening of baffle upper plate and chin spoiler; The short grass that master rotor below vibratory sieve is discharged does not surplusly get into grass chopper with assorted, has gathered on the ground and directly drop on, and has reduced by about 5%～10% broken grass and has got into grass chopper; Alleviate live load, effectively reduced power consumption.

Description of drawings

Fig. 1 is for using the sketch map of longitudinal axis stream grain header of the present invention.

Fig. 2 is the enlarged drawing of A portion among Fig. 1.

Fig. 3 is a front view of the present invention.

Fig. 4 is the M-M revolved sectional view among Fig. 3.

Fig. 5 is a stationary knife front view of the present invention.

Fig. 6 is the left view of Fig. 5.

Fig. 7 is the vertical view of Fig. 6.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present invention is described.

Like Fig. 1, shown in Figure 2, grass chopper 1 parallel prolong knot is at the rear lower of grain header 21, and the power of grass chopper 1 is provided by grain header 21 backside pulley, reaches the vee-pulley 11 on the movable arbor of grass chopper through belt 22 and drives the cutter shaft rotation; Feeding mouth at grass chopper 1 top is provided with the baffle upper plate 3 and vertical chin spoiler 5 that is tilted to grain header 21 fuselages; Baffle upper plate 3 is connected with the discharging swash plate 24 of screen cloth 25 height of grain header 21 fuselage afterbodies mutually; (two plates also can at a distance of certain distance; Do not need to overlap fully) discharging opening of grain header 21 fuselage afterbodies is divided into two passages up and down, wherein, the long stalk 23-1 of screen cloth 25 tops pulverizes through the passage I entering grass chopper 1 on top; And the short grass 23-2 that discharges between screen cloth 25 and the vibratory sieve 19 is with assorted surplus; Intercepted by baffle upper plate 3 and chin spoiler 5, can only fall to the farmland, do not pulverize and need not pass through grass chopper 1 through the passage II of bottom.According to practical observation, can be through the short grass of screen cloth 25, its size is enough little, need further not pulverize; And this a part of short grass accounts for 5%～10% of total amount, therefore through the setting of this split tunnel, can effectively reduce the service load of grass chopper, practices thrift power consumption, also reduced the wearing and tearing of cutter, prolonged cutter life.Feeding mouth at grass chopper 1 top also is provided with turnover dodge gate 2, at the occasion that does not the need broken grass dodge gate 2 that directly closes, promptly can let end face landing that stalk directly passes through dodge gate 2 in the farmland.

Like Fig. 3, shown in Figure 4; The left plate 16 of grass chopper 1, right plate 18 constitute body structure with rear board 17; On left side plate, hexagonal axis 8 is installed, is provided with scraper plate 12 and end cap 13 in the both sides of hexagonal axis 8, be wound on the axle with the stalk of avoiding both sides through the bearing in the bearing block 15 14; Secured in parallel has some knife sections 10 in the middle of the hexagonal axis 8, and knife section 10 is the central diamond shaped insert that hexagon ring is arranged, and the diameter of knife section 10 is 300～350mm, the manganese alloy steel sheet material of material for handling through surface hardening; Knife section 10 is arranged on the hexagonal axis 8 through spacer 9 equi-spaced apart, and spacer 9 central authorities also are provided with hexagon ring.The present invention adopts the hexagonal axis structure; End cap 13, spacer 9 that central authorities are provided with hexagon ring directly are set on the hexagonal axis with knife section 10 and get final product; Not only simple and reliable for structure, effectively transmit rotation torque, and adjacent knife section 10 can be with the angle that interlaces of 60 degree; The distribution cutting force has been avoided the concentrated machine short-time overload that causes of cutting force when blade is single arranges uniformly.

Stationary knife 7 of the present invention is fixed on the tool fixing frame 6, and tool fixing frame 6 is welded between left plate 16 and the right plate 18, has increased the frame strength and the rigidity of grass chopper 1.Arrangements that interlace of stationary knife 7 and moving knife 10, to shown in Figure 7, lengthening " U " shape stationary knife 7 length are 100～120mm like Fig. 5, and two arms are provided with cutting edge 7-1, and blade thickness is 3-4mm, to increase rigidity and increase grass chopper cutting power; Utilize two support bolts through the connecting portion through hole 7-2 between two arms stationary knife 7 to be fixed on the tool fixing frame 6, simple in structure, mounting or dismounting are convenient.

During real work; Open dodge gate 2, the disorderly grass that grain header 21 cylinders are discharged gets into grass chopper through deflector, stationary knife 7 supporting straws; Movable arbor is with 2000～2500rpm high speed rotating; Knife section 10 with the linear velocity of 30～45m/s impact, shear, confused crushing straw, and cataclasm stalk is rearward evenly flown out from the grass chopper bottom, reach good broken careless effect.

More than describing is to explanation of the present invention; It or not qualification to invention; Institute of the present invention restricted portion is referring to claim, and under the situation of spirit of the present invention, the present invention can do any type of modification; For example the hexagonal axis with moving knife changes circular shaft into, and adopts the mode of other location and fixed blade; Perhaps mounting means of the present invention is changed slightly, to be used for the transverse-axis-flow grain header.

Claims

1. grass chopper is arranged on the stalk discharging opening of grain header, by the knife section that is fixed on rotary middle spindle be fixed on the arrangement that interlaces of ledger-plate on the frame, it is characterized in that:

---said central shaft is hexagonal axis (8);

---said knife section (10) is a diamond shaped insert, is set on the hexagonal axis (8) through the center hexagon ring, and adopts spacer (9) to carry out the interval;

---said stationary knife (7) is " U " font, and two arms are provided with cutting edge (7-1), is provided with fixed via (7-2) at connecting portion.

2. according to the described grass chopper of claim 1; It is characterized in that: the feeding mouth at grass chopper (1) top is provided with outward-dipping baffle upper plate (3) and vertical chin spoiler (5); Baffle upper plate (3) is connected with the discharging swash plate (24) of grain header fuselage afterbody mutually, and the discharging opening of grain header fuselage afterbody is divided into two passages up and down.

3. according to the described grass chopper of claim 1, it is characterized in that: adjacent knife section (10) is with the angle that interlaces of 60 degree.

4. according to the described grass chopper of claim 1, it is characterized in that: the feeding mouth at grass chopper (1) top is provided with turnover dodge gate (2).