CN211129004U

CN211129004U - Be applied to reducing mechanism of wheat harvester

Info

Publication number: CN211129004U
Application number: CN201921308566.5U
Authority: CN
Inventors: 柳钡; 柳鹏; 李志�
Original assignee: Hebei Zhengtu Agricultural Machinery Co ltd
Current assignee: Hebei Zhengtu Agricultural Machinery Co ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-07-31
Anticipated expiration: 2029-08-13

Abstract

The utility model provides a be applied to reducing mechanism of wheat harvester, the stationary knife subassembly includes the stationary knife axle, the stationary blade piece, the connecting rod, regulating plate and movable bolt, the stationary knife axle is worn on the stationary knife fixed slot, and fix on the curb plate of controlling of smashing the main casing through the bearing frame, the stationary knife axle is located the downside of smashing the bottom plate, the stationary blade piece has a plurality of, the stationary blade piece lower extreme welds in proper order on the movable knife axle, the stationary blade piece upper end passes the bottom plate groove and is located the upside of smashing the bottom plate, set up convex adjustment tank on the regulating plate, the angle of regulation of adjustment tank is β, connecting rod one end is fixed on the stationary knife axle, the connecting hole is seted up to the connecting rod other end, the centre of a circle of connecting hole is located the circular arc center line of adjustment tank, movable bolt passes the connecting hole and blocks and stumbles on the adjustment tank, this trash removal device is through improving the stationary knife subassembly into height-adjustable structure, when meetting wet straw, appropriate reduction stationary knife.

Description

Be applied to reducing mechanism of wheat harvester

Technical Field

The utility model relates to an agricultural harvester technical field specifically is a be applied to reducing mechanism of wheat harvester.

Background

Wheat is a gramineous plant, is one of three major cereals, is a cereal crop widely planted around the world, and is one of the earliest countries in the world in China. The national summer grain production data published by the State statistics office shows that the total yield of the national summer grain is 14174 million tons (2835 million jin) in 2019, and is increased by 293 million tons (58.6 million jin) in 2018 by 2.1 percent. Wherein the wheat yield is 13106 ten thousand tons (2621 million jin) which is increased by 267 thousand tons (53.3 million jin) in 2018, and is increased by 2.1%.

At present, with the development of society and the continuous progress of agricultural science and technology, agricultural mechanization begins to be popularized rapidly, wheat harvesters are more and more favored by farmers due to the high harvesting efficiency of the wheat harvesters, and with the continuous deepening of agricultural modernization, the wheat harvesters are bound to become one of important tools of the modern agriculture. The crushing device is an important component of the wheat harvester, and the movable cutter and the fixed cutter in the crushing device are matched to crush the straws and scatter the straws to the field side by side.

The inventor discovers in the production operation, because the width of the breadth of our country, the operation environment in each place is not only the same, this problem that just makes some operation plots have wet straw, wheat harvester is meetting wet straw when reaping, because of the toughness of wet straw is good, the resistance to the stationary knife is very big, however, prior art reducing mechanism's stationary knife height can't be adjusted, very easily make wet straw accumulate at the stationary knife front end, increase along with the operating time, the accumulation volume of wet straw can be more and more, lead to wet straw all to block up the import of reducing mechanism, make to move the sword unable work, the phenomenon that the belt burns out appears even. And meanwhile, the blocked wet straws need to be fished in a parking area of an agricultural machinery, so that the operation efficiency is reduced, and the income is reduced.

Through the analysis, the crushing device with the height capable of being flexibly adjusted by the fixed cutter is absent in the existing wheat harvester.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a be applied to reducing mechanism of wheat harvester avoids corn harvester at the operation in-process, because of straw winding rotation axis, leads to during straw or impurity block up casing assembly for arrange the unable normal work of miscellaneous device, appear the problem that the belt burns out even.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a crushing device applied to a wheat harvester comprises a shell component, a movable cutter component, a fixed cutter component and a fan component which are fixed on the shell component, wherein,

the shell assembly comprises a crushing shell, a fan shell and a guide row shell, wherein the crushing shell comprises a crushing main shell and a crushing bottom plate fixed on the crushing main shell, the crushing main shell is of a U-shaped structure, moving knife fixing holes and fixed knife fixing grooves which are symmetrically distributed are formed in the left side plate and the right side plate of the crushing main shell, the fixed knife fixing grooves are of a U-shaped structure, the crushing bottom plate is fixed in the crushing main shell, and a bottom plate groove is formed in the crushing bottom plate;

the movable cutter component comprises a movable cutter shaft, a plurality of movable cutters and movable cutter wheels, the movable cutter shaft is sleeved in the movable cutter fixing hole and fixed on the left side plate and the right side plate of the crushing main shell through bearing seats, the plurality of movable cutters are uniformly distributed on the movable cutter shaft along the circumference, sawteeth are formed on the movable cutters, and the movable cutter wheels are fixed at one end of the movable cutter shaft;

the fixed cutter assembly comprises fixed cutter shafts, fixed blades, connecting rods, adjusting plates and movable bolts, the fixed cutter shafts penetrate through the fixed cutter fixing grooves and are fixed on the left side plate and the right side plate of the crushing main shell through bearing seats, the fixed cutter shafts are positioned on the lower side of the crushing bottom plate, a plurality of fixed blades are arranged, the lower ends of the fixed blades are sequentially welded on the movable cutter shafts, and the upper ends of the fixed blades penetrate through the bottom plate grooves and are positioned on the upper side of the crushing bottom plate;

the adjusting plate is fixed on the outer side of the crushing main shell, an arc-shaped adjusting groove is formed in the adjusting plate, the adjusting angle of the adjusting groove is β, and the adjusting angle is equal to or larger than 0 degree and equal to or larger than β degree and equal to or smaller than 90 degree;

one end of the connecting rod is fixed on the fixed cutter shaft, the other end of the connecting rod is provided with a connecting hole, the circle center of the connecting hole is positioned on the arc center line of the adjusting groove, and the movable bolt penetrates through the connecting hole and is clamped on the adjusting groove;

the fan assembly comprises a fan shaft, blades and a fan wheel, the fan shaft is fixed on the fan shell through a bearing seat, the blades are uniformly distributed on the fan shaft, and the fan wheel is fixed on one side of the fan shaft.

Further, the guide and discharge shell is positioned at the discharge port of the crushing shell and the upper side of the air outlet of the fan shell.

Furthermore, the cross section of the guide row shell is of an inverted U-shaped structure.

Further, the height value of the upper end of the fixed cutter on the upper side of the crushing bottom plate is H, and H is changed along with β of the movable bolt in the adjusting groove correspondingly.

Further, when the movable bolt is at 0 °, the height value of the upper end of the fixed blade at the upper side of the crushing base plate is H1, and H1 is a maximum value;

when the movable bolt is at 90 °, the height of the upper end of the fixed blade at the upper side of the pulverizing floor is H2, and H2 is the minimum.

Furthermore, the number of the fixed blades is the same as that of the bottom plate grooves, and the central axes of the fixed blades are coincident with the corresponding central axes of the bottom plate grooves.

Further, the number of the fixed blades is 7, and the distances between the adjacent fixed blades are the same.

Further, the shape of the stationary blade is not limited to triangle, isosceles trapezoid, or rectangle.

Further, the fixed blades and the movable blades are distributed in the crushing shell in a staggered mode, straws entering the crushing shell are crushed, and the straws are conveyed to the guide row shell;

the guide row shell is provided with row adjusting grooves and row adjusting holes, and the number of the row adjusting grooves is the same as that of the row adjusting holes.

Further, the shell assembly further comprises an adjusting plate and an adjusting bolt, the number of the adjusting plate is equal to the number of the adjusting grooves, and the adjusting bolt penetrates through the adjusting grooves and the adjusting holes, so that the adjusting plate is connected with the guide row shell.

(III) advantageous effects

The utility model provides a be applied to reducing mechanism of wheat harvester compares with prior art and possesses following beneficial effect:

the straw impurity removing device comprises a shell assembly, a movable cutter assembly, a fixed cutter assembly and a fan assembly, wherein the movable cutter assembly, the fixed cutter assembly and the fan assembly are fixed on the shell assembly, the shell assembly comprises a crushing shell, a fan shell and a guide row shell, the crushing shell comprises a crushing main shell and a crushing bottom plate fixed on the crushing main shell, the crushing main shell is of a U-shaped structure, movable cutter fixing holes and fixed cutter fixing grooves which are symmetrically distributed are formed in the left side plate and the right side plate of the crushing main shell, the fixed cutter fixing grooves are of a U-shaped structure, the crushing bottom plate is fixed in the crushing main shell, the crushing bottom plate is provided with bottom plate grooves, the movable cutter assembly comprises a movable cutter shaft, a movable cutter blade and a movable cutter wheel, the movable cutter shaft penetrates through the movable cutter fixing holes and is fixed on the left side plate and the right side plate of the crushing main shell through a bearing seat, the movable cutter blade is uniformly distributed on the movable cutter shaft along the circumference, sawteeth are formed in the movable cutter blade, the movable cutter shaft is fixed at one end of the movable cutter shaft, the fixed cutter shaft is fixed at the lower end of the movable cutter shaft, the adjustable blade is not more than 358590, the adjustable blade, the fan blade, the adjustable blade is fixed on the fan shaft, the adjustable blade is fixed on the fan shaft, the fan shaft is fixed blade is fixed on the fan shaft, the adjustable blade is fixed shaft, the fan.

Drawings

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

FIG. 1 is a schematic view of a crushing apparatus according to a first embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is a schematic view showing the structure of a crushing main casing according to the first embodiment;

FIG. 5 is a schematic view of a bottom plate of the first embodiment;

FIG. 6 is an enlarged view of a portion of the crushing apparatus according to the first embodiment;

FIG. 7 is a schematic structural diagram of a fan assembly according to an embodiment;

FIG. 8 is a schematic structural diagram of a lead frame according to an embodiment;

FIG. 9 is an enlarged view of portion C of FIG. 8;

illustration of the drawings: 1-a housing assembly; 11-crushing shell; 111-crushing the main shell; 1111-moving blade fixing holes; 1112-stationary knife fixing groove; 112-a crushing bottom plate; 1121-floor trough; 12-a fan housing; 13-a guide row shell; 131-a row adjusting plate; 132-adjusting the row bolts; 133-adjusting and arranging groove; 134-row adjusting holes;

2-moving the knife assembly; 21-moving blade shaft; 22-moving blade; 23-moving cutter wheel;

3-a stationary knife assembly; 31-fixing a cutter shaft; 32-stationary blade; 33-a connecting rod; 34-an adjusting plate; 341-an adjustment tank; 35-a movable bolt;

4-a fan assembly; 41-fan shaft; 42-blades; 43-Fan wheel.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. In addition, for the convenience of description, the terms "upper", "lower", "left" and "right" are used to refer to the same direction as the upper, lower, left, right, etc. of the drawings, and the terms "first", "second", etc. are used for descriptive distinction and have no special meaning.

To the problem that exists among the prior art, the utility model provides a be applied to reducing mechanism of wheat harvester, including the casing subassembly, and be fixed in move sword subassembly, stationary knife subassembly, fan subassembly on the casing subassembly, specifically explain as follows:

(1) shell assembly

The shell assembly comprises a crushing shell, a fan shell and a guide row shell, wherein the crushing shell comprises a crushing main shell and a crushing bottom plate fixed on the crushing main shell, the crushing main shell is of a U-shaped structure, moving knife fixing holes and fixed knife fixing grooves which are symmetrically distributed are formed in left and right side plates of the crushing main shell, the fixed knife fixing grooves are of a U-shaped structure, the crushing bottom plate is fixed in the crushing main shell, and bottom plate grooves are formed in the crushing bottom plate.

In a specific application scenario, the fan housing is located at the outlet side of the smashing housing, the fan housing is of a centrifugal fan structure, the air volume of the centrifugal fan structure is large, smashed straws can be discharged to the guiding and discharging housing, and finally the smashed straws are discharged to a field through the guiding and discharging housing.

The shell assembly is made of steel plates through cutting, bending and welding, and the thickness of each steel plate is not less than 4 mm. The shell assembly is subjected to surface treatment by adopting a plastic spraying process, so that the surface rust prevention and corrosion prevention performance is improved.

The fan shell is provided with a left side plate and a right side plate, wherein the left side plate and the right side plate are provided with fan fixing holes and fan air inlet holes which are symmetrically distributed. The width of the fan shell is the same as that of the crushing main shell.

In a specific application scene, the arrangement adjusting bolts of the arrangement adjusting holes are used as circle centers, and the arrangement adjusting plates are arranged at different angles by adjusting the positions of the arrangement adjusting bolts of the arrangement adjusting grooves in the arrangement adjusting grooves, so that the wheat straw throwing direction can be adjusted.

(2) Move sword subassembly

The movable cutter component comprises a movable cutter shaft, a movable cutter blade and a movable cutter wheel, wherein the movable cutter shaft is sleeved in the movable cutter fixing hole and fixed on the left side plate and the right side plate of the crushing main shell through bearing seats, the movable cutter blade is provided with a plurality of parts and is uniformly distributed on the movable cutter shaft along the circumference, sawteeth are formed in the movable cutter blade, and the movable cutter wheel is fixed at one end of the movable cutter shaft.

In a specific application scene, the arrangement of the movable blades can be a double-blade structure or a single-blade structure.

Wherein, the transmission mode of the movable cutter wheel is belt transmission.

(3) Stationary knife assembly

one end of the connecting rod is fixed on the fixed cutter shaft, the other end of the connecting rod is provided with a connecting hole, the circle center of the connecting hole is located on the arc center line of the adjusting groove, and the movable bolt penetrates through the connecting hole and is clamped on the adjusting groove.

In a specific application scenario, the fixed blade is triangular in shape.

Further, the connection rod is located at an outer side of the pulverizing main casing.

In a specific application scene, the connecting rod is located the outside of smashing the main casing to the connecting rod is same side with the regulating plate.

Furthermore, the fixed blades and the movable blades are distributed in the crushing shell in a staggered mode, straws entering the crushing shell are crushed, and the straws are conveyed to the guide row shell.

(4) Fan assembly

The utility model provides a be applied to reducing mechanism of wheat harvester compares with prior art and possesses following beneficial effect: this arrange miscellaneous device includes the casing subassembly, and is fixed in moving knife tackle spare, stationary knife tackle spare, fan subassembly on the casing subassembly, through improving the stationary knife tackle spare into height-adjustable formula structure, when meetting wet straw, suitable reduction stationary blade height reduces the resistance that wet straw passes through to guarantee that reducing mechanism normally works, and then improved the operating efficiency, increased the income.

The first embodiment is as follows:

based on the above concept, as shown in fig. 1-9, the schematic structural diagram of the crushing device in the first specific application scenario provided by the present invention comprises a housing assembly 1, and a movable knife assembly 2, a fixed knife assembly 3, and a fan assembly 4 fixed on the housing assembly 1, wherein,

as shown in fig. 1, the housing assembly 1 includes a pulverizing housing 11, a fan housing 12, and a guide casing 13, where the pulverizing housing 11 includes a pulverizing main housing 111, and a pulverizing bottom plate 112 fixed on the pulverizing main housing 111, as shown in fig. 4, the pulverizing main housing 111 is a U-shaped structure, moving blade fixing holes 1111 and fixed blade fixing grooves 1112 symmetrically distributed are formed on left and right side plates of the pulverizing main housing 111, the fixed blade fixing grooves 1112 are U-shaped, as shown in fig. 5, the pulverizing bottom plate 112 is fixed in the pulverizing main housing 111, and a bottom plate groove 1121 is formed on the pulverizing bottom plate 112;

as shown in fig. 6, the movable blade assembly 2 includes a movable blade shaft 21, a movable blade 22 and a movable blade wheel 23, the movable blade shaft 21 is inserted into the movable blade fixing hole 1111 and fixed to the left and right side plates of the crushing main shell 111 through a bearing seat, the plurality of movable blades 22 are uniformly distributed on the movable blade shaft 21 along the circumference, the movable blade 22 is provided with saw teeth, and the movable blade wheel 23 is fixed to one end of the movable blade shaft 21;

as shown in fig. 2, the fixed knife assembly 3 includes a fixed knife shaft 31, fixed knife blades 32, a connecting rod 33, an adjusting plate 34 and a movable bolt 35, the fixed knife shaft 31 penetrates through the fixed knife fixing groove 1112 and is fixed on the left and right side plates of the main crushing shell 111 through a bearing seat, the fixed knife shaft 31 is located on the lower side of the crushing bottom plate 112, there are a plurality of fixed knife blades 32, the lower ends of the fixed knife blades 32 are sequentially welded on the movable knife shaft 21, and the upper ends of the fixed knife blades 32 penetrate through the bottom plate groove 1121 and are located on the upper side of the crushing bottom plate 112;

as shown in fig. 2, the adjusting plate 34 is fixed on the outer side of the main crushing shell 111, the adjusting plate 34 is provided with a circular arc-shaped adjusting groove 341, the adjusting angle of the adjusting groove 341 is β, and the angle is equal to or greater than 0 degree and equal to or less than β and equal to or less than 90 degrees;

as shown in fig. 2, one end of the connecting rod 33 is fixed on the stationary knife shaft 31, the other end of the connecting rod 33 is provided with a connecting hole, the center of the connecting hole is located on the arc center line of the adjusting groove 341, and the movable bolt 35 passes through the connecting hole and is clamped on the adjusting groove 341;

as shown in fig. 7, the fan assembly 4 includes a fan shaft 41, blades 42 and a fan wheel 43, the fan shaft 41 is fixed on the fan housing 12 through a bearing seat, the blades 42 are uniformly distributed on the fan shaft 41, and the fan wheel 43 is fixed on one side of the fan shaft 41.

Further, the guide casing 13 is positioned above the discharge port of the pulverization casing 11 and the air outlet of the fan casing 12.

Further, as shown in fig. 8, the cross section of the guide shell 13 is in an inverted U-shaped structure.

Further, the height of the upper end of the fixed knife at the upper side of the crushing bottom plate 112 is H, and H is changed correspondingly with β of the movable bolt 35 in the adjusting groove 341.

Further, as shown in FIG. 2, when the movable bolt 35 is at 0 °, the height value of the upper end of the fixed blade at the upper side of the crushing bottom plate 112 is H1, and H1 is a maximum value;

when the movable bolt 35 is at 90 °, the height of the upper end of the fixed blade at the upper side of the pulverizing floor 112 is H2, and H2 is the minimum.

Further, the number of the fixed blades 32 is the same as that of the bottom plate grooves 1121, and the central axis of the fixed blade 32 coincides with the central axis of the corresponding bottom plate groove 1121.

Further, as shown in fig. 6, the number of the fixed blades 32 is 7, and the distances between the adjacent fixed blades 32 are the same.

Further, the shape of the stationary blade 32 is not limited to a triangle, an isosceles trapezoid, or a rectangle.

Further, the fixed blades 32 and the movable blades 22 are distributed in the crushing shell 11 in a staggered manner, so that the straws entering the crushing shell 11 are crushed and conveyed to the guide row shell 13;

as shown in fig. 9, the row adjusting grooves 133 and the row adjusting holes 134 are formed in the row guiding housing 13, and the number of the row adjusting grooves 133 is the same as that of the row adjusting holes 134.

Further, as shown in fig. 3, the housing assembly 1 further includes an arrangement adjusting plate 131 and an arrangement adjusting bolt 132, the number of the arrangement adjusting plate 131 is the same as that of the arrangement adjusting groove 133, and the arrangement adjusting bolt 132 penetrates through the arrangement adjusting groove 133 and the arrangement adjusting hole 134, so that the arrangement adjusting plate 131 is connected to the guide row housing 13.

Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the drawings are not necessarily required to implement the present invention.

Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.

The above disclosure is only a concrete implementation scenario of the present invention, however, the present invention is not limited to this, and any changes that can be made by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. The crushing device applied to the wheat harvester is characterized by comprising a shell component (1), a movable cutter component (2), a fixed cutter component (3) and a fan component (4) which are fixed on the shell component (1), wherein,

the shell assembly (1) comprises a crushing shell (11), a fan shell (12) and a guide row shell (13), wherein the crushing shell (11) comprises a crushing main shell (111) and a crushing bottom plate (112) fixed on the crushing main shell (111), the crushing main shell (111) is of a U-shaped structure, movable knife fixing holes (1111) and fixed knife fixing grooves (1112) which are symmetrically distributed are formed in the left side plate and the right side plate of the crushing main shell (111), the fixed knife fixing grooves (1112) are of a U-shaped structure, the crushing bottom plate (112) is fixed in the crushing main shell (111), and a bottom plate groove (1121) is formed in the crushing bottom plate (112);

the movable knife assembly (2) comprises a movable knife shaft (21), a movable knife blade (22) and movable knife wheels (23), the movable knife shaft (21) penetrates through the movable knife fixing holes (1111) and is fixed on the left side plate and the right side plate of the crushing main shell (111) through bearing seats, the number of the movable knife blades (22) is multiple, the movable knife blades are uniformly distributed on the movable knife shaft (21) along the circumference, sawteeth are formed in the movable knife blade (22), and the movable knife wheels (23) are fixed at one end of the movable knife shaft (21);

the fixed knife assembly (3) comprises a fixed knife shaft (31), fixed blades (32), a connecting rod (33), an adjusting plate (34) and movable bolts (35), wherein the fixed knife shaft (31) penetrates through the fixed knife fixing grooves (1112) and is fixed on the left side plate and the right side plate of the crushing main shell (111) through bearing seats, the fixed knife shaft (31) is positioned on the lower side of the crushing bottom plate (112), a plurality of fixed blades (32) are arranged, the lower ends of the fixed blades (32) are sequentially welded on the movable knife shaft (21), and the upper ends of the fixed blades (32) penetrate through the bottom plate grooves (1121) and are positioned on the upper side of the crushing bottom plate (112);

the adjusting plate (34) is fixed on the outer side of the crushing main shell (111), a circular arc adjusting groove (341) is formed in the adjusting plate (34), the adjusting angle of the adjusting groove (341) is β, and the adjusting angle is equal to or larger than 0 degree and equal to or larger than β degree and equal to or larger than 90 degree;

one end of the connecting rod (33) is fixed on the fixed cutter shaft (31), the other end of the connecting rod (33) is provided with a connecting hole, the circle center of the connecting hole is positioned on the arc center line of the adjusting groove (341), and the movable bolt (35) penetrates through the connecting hole and is clamped on the adjusting groove (341);

the fan assembly (4) comprises a fan shaft (41), blades (42) and a fan wheel (43), the fan shaft (41) is fixed on the fan shell (12) through a bearing seat, the blades (42) are uniformly distributed on the fan shaft (41), and the fan wheel (43) is fixed on one side of the fan shaft (41).

2. Comminution device as in claim 1, in which the guide shell (13) is located on the upper side of the outlet opening of the comminution shell (11) and of the outlet opening of the fan housing (12).

3. Comminution device as in claim 2, in which the guide shell (13) is of inverted U-shaped cross-section.

4. The crushing apparatus according to claim 1, wherein the upper end of the fixed blade is positioned at a height H on the upper side of the crushing base plate (112), and H is varied according to β of the movable bolt (35) in the adjustment groove (341).

5. The crushing apparatus according to claim 4, wherein when the movable bolt (35) is at 0 °, the height value of the upper end of the fixed blade on the upper side of the crushing floor (112) is H1, and H1 is a maximum value;

when the movable bolt (35) is at 90 DEG, the height value of the upper end of the fixed knife on the upper side of the crushing bottom plate (112) is H2, and H2 is the minimum value.

6. The comminution apparatus according to claim 1, characterized in that the number of the stationary blades (32) is the same as the number of the floor slots (1121), and the central axes of the stationary blades (32) coincide with the central axes of the corresponding floor slots (1121).

7. The comminution apparatus as claimed in claim 6, characterized in that the number of the stationary blades (32) is 7, and the spacing between adjacent stationary blades (32) is the same.

8. The comminution device according to claim 1, characterized in that the shape of the stationary blade (32) is not limited to triangular, isosceles trapezoid, rectangular.

9. The crushing device according to claim 1, characterized in that the fixed blades (32) and the movable blades (22) are distributed in the crushing shell (11) in a staggered manner, and are used for crushing the straws entering the crushing shell (11) and conveying the crushed straws to the guide-discharge shell (13);

the guide row shell (13) is provided with row adjusting grooves (133) and row adjusting holes (134), and the number of the row adjusting grooves (133) is the same as that of the row adjusting holes (134).

10. The comminution device of claim 9, wherein the housing assembly (1) further comprises an alignment plate (131) and alignment bolts (132), the number of the alignment plate (131) is the same as the number of the alignment grooves (133), and the alignment bolts (132) pass through the alignment grooves (133) and the alignment holes (134) so that the alignment plate (131) is connected with the guide casing (13).