CN109892070B - Ditching blade suitable for cobble intensive ground surface layer - Google Patents
Ditching blade suitable for cobble intensive ground surface layer Download PDFInfo
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- CN109892070B CN109892070B CN201910309094.3A CN201910309094A CN109892070B CN 109892070 B CN109892070 B CN 109892070B CN 201910309094 A CN201910309094 A CN 201910309094A CN 109892070 B CN109892070 B CN 109892070B
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Abstract
The utility model discloses a ditching blade suitable for a cobble intensive ground surface layer, which comprises two parts, namely a mounting body and a cutter body, wherein the mounting body and the cutter body are distributed up and down and are connected into a whole; the installation body comprises an installation body top surface, four installation body side surfaces, four installation body side curved surfaces, four installation body side planes and an area surrounded by an installation body bottom surface; the cutter body comprises a cutter body top surface, four cutter body side surfaces and a region surrounded by a cutter blade surface. The utility model can be applied to the natural grassland surface layer in the high-altitude cold area, solves the ditching problem of large gravel scale and dense distribution in the cobble dense surface layer, and has great significance for ecological protection and construction engineering of the high-altitude natural grassland.
Description
Technical Field
The utility model belongs to the technical fields of special equipment and energy conservation and environmental protection, and particularly relates to a ditching blade suitable for a cobble intensive ground surface layer.
Background
In ecological protection and construction of natural grasslands in high-altitude cold areas, no-tillage sowing technology is widely applied by virtue of the technology, and sowing can be realized on the premise of smaller moving soil. However, in the surface layer of natural grasslands in high-altitude areas, the distribution of cobbles is very dense, especially large cobbles, which seriously affects the application effect of no-tillage seeding technology. Wherein, the ditching blade is a key technology of no-tillage seeding technology.
In the prior art, people do a lot of work in ditching technology, specifically including:
the utility model provides a single body of a furrow opener, which is provided by Chinese patent application No. 201720710080.9 and named as a flexible furrow opener on a no-tillage planter, and comprises square steel, a hexagon head screw bolt with holes, a tension spring, a fastening bolt, a furrow opener main body, square iron sheets and a bulldozing mechanism. However, the single body of the furrow opener still has the defect that the furrow opener adopts a furrow-share type furrow opener blade, when the furrow opener blade encounters stones in a soil layer, the furrow opener blade can only avoid the stones due to the flexible characteristic, the stones are not taken out or moved, and when the distribution density of the stones is larger and the scale of the stones is larger, the furrow opener blade can not open furrows due to the fact that the stones are continuously avoided. Therefore, the utility model is obviously not very suitable for the intensive stone ground surface layer, and is only suitable for the working environment with less stones.
The Chinese patent with the application number of 201820942367.9 and the name of automatic reseeding machine for recovering grassland vegetation provides a ditching nail in the shape of an inverted triangular cone or a barb, but the ditching nail still has the defects that the ditching nail is pressed into a soil layer under the action of self gravity of the automatic reseeding machine, and the ditching nail is used for cutting the soil layer into ditches under the driving action of a tractor. When ditching, ditching nail is perpendicular state with the soil layer, can become flexible small-size stone, when meetting great stone, because can't avoid large-size stone or make it move, directly cause the metal to bump the situation of "hard" of stone, when ditching nail wearing and tearing are serious, very easily cause the bending of ditching nail even fracture. Therefore, the ditching nail provided by the utility model can not solve the problem of large stones in the soil layer, and is only suitable for working in the soil layer with proper soil tightness and small stones.
The Chinese patent application No. 201821070699.9 entitled "double disk ditcher" provides a ditching knife with its cutting edge curved toward the interior of the frame. However, the ditching knife provided by the utility model still has the defect that the arc ditching knife blade does not indicate specific parameters of radian (radius) and circle center point position, so that the shape and the size of the ditching knife blade cannot be determined, the ditching knife blade has no machinability, and the working effect cannot be ensured when a stone is encountered.
The Chinese patent application No. 201811243509.3 entitled "agricultural ditching device convenient to adjust" provides a coulter and an auxiliary coulter. However, the coulter provided by the utility model still has the defects that the cutting edges at the two sides of the coulter are two concave curves, and the top of the coulter is an outward convex curve, so that a sharper included angle is formed at the intersection part of the concave curve and the outward convex curve, namely, the shape change is very intense, when the included angle part bumps against a large stone, the phenomenon of hard bump can occur, and the phenomenon of hard bump is easy to cause the severe deformation and even fracture of the included angle part, thereby influencing the service life of the coulter. In addition, the utility model provides a bucket arranged at the forefront of the ditching device, which can play a role in clearing obstacles in front of the ditching device so as to prevent the ditching effect from being influenced or prevent the coulter from being damaged, but does not mention how to prevent or solve the hard objects such as large stones and the like in soil layers. Therefore, the coulter provided by the utility model is only suitable for the environment without large-scale stones in the soil, and is not suitable for the soil environment with large stone distribution density and large scale.
The Chinese patent with the application number of 201020574610.X and the name of a ditching knife provides a spiral type blade, which comprises a rim, wherein a plurality of spiral type blades are uniformly distributed on the periphery of the rim; the cutter head of the spiral line type blade faces to the inner side, the soil outlet direction of the excavation is changed along with different angles, and soil can be discharged leftwards, rightwards and upwards, and the novel ditching and soil discharging device has the characteristics of small excavation resistance and good ditching and soil discharging effects; in addition, the device also has the functions of conveying the soil in the spiral direction and throwing the soil in the circumferential centrifugal force direction. The utility model has obvious performance advantages in ditching and soil yielding, but the blade of the utility model still has defects. If large stones are encountered, the stones enter the area between the adjacent blades, so that the ditching cutter is very easy to block, and more seriously, the excavation resistance is increased rapidly in an instant, the spiral-line-type blades are deformed or even broken seriously due to collision, and the service performance and the service life of the blades are seriously affected. In addition, when the ditching knife provided by the utility model is used for ditching, the spiral line type blade enables the soil movement quantity to be large, so that no-tillage sowing is meaningless. Therefore, the ditching knife provided by the utility model is only suitable for being used in the farmland with less stone distribution and smaller scale, and is not suitable for being used in the cobble-dense natural grassland surface layer.
In the soil layer of the natural grassland in the high-altitude cold area, more gravels with different scales are usually arranged, the natural grassland with wide area is located in the Tibetan in the southwest area of China, the gravels on the surface layer of the natural grassland are mostly in the form of cobbles, the scale of the gravels in the soil layer of the soil surface is large and the gravels are densely distributed, and the conventional ditching technology is obviously not applicable to the gravels.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides the ditching blade suitable for the surface layer of the cobble intensive land, which can be suitable for the surface layer of the natural grassland in the high-altitude cold area, solves the ditching problem of the cobble intensive surface layer in a state that gravels are large in scale and densely distributed, and has great significance for ecological protection and construction engineering of the high-altitude natural grassland.
For this purpose, the utility model adopts the following technical scheme:
the ditching blade suitable for the cobble intensive ground surface layer comprises a mounting body and a cutter body, wherein the mounting body and the cutter body are distributed up and down and are connected into a whole; the installation body comprises an installation body top surface, four installation body side surfaces, four installation body side curved surfaces, four installation body side planes and an area surrounded by an installation body bottom surface; the cutter body comprises a cutter body top surface, four cutter body side surfaces and a region surrounded by a cutter blade surface.
Preferably, two cylindrical holes are arranged on the side surface of the installation body and are respectively positioned at the middle positions of the two opposite side surfaces of the installation body, and the ditching blades are used for being installed in the corresponding ditching devices.
Preferably, the top surface of the installation body is a plane and is positioned at the uppermost part of the ditching blade; the side surface of the installation body is a curved surface, and the curved surface is provided with four sides, including three straight lines and a parabola; the curved surface of the side part of the installation body is a curved surface, and the curved surface is provided with three sides and comprises two straight lines and a parabola; the plane of the side part of the installation body is a plane, the plane is provided with three sides, and the three sides are all straight lines; the bottom surface of the installation body is a plane, and the plane is provided with four sides, including two straight lines and two parabolas.
Preferably, the side surface of the installation body, the curved surface of the edge of the installation body and the plane of the edge of the installation body which are positioned on the same side are sequentially and horizontally arranged, wherein the juncture of the side surface of the installation body and the curved surface of the edge of the installation body is a straight line, and the juncture of the curved surface of the edge of the installation body and the plane of the edge of the installation body is a straight line.
Preferably, the junction between the top surface of the installation body and the side surface, the curved surface and the plane of the side of the installation body on the same side is a straight line, a point and a straight line respectively.
Preferably, the top surface of the cutter body is a plane, and the plane is provided with four sides, including two straight lines and two parabolas; the side surface of the cutter body is a curved surface, the curved surface is provided with three sides, and the three sides are parabolic; the blade surface is a paraboloid, and the section shape of the paraboloid is parabolic.
Preferably, the side surface of the cutter body and the cutting edge surface on the same side are horizontally arranged, and the boundary of the side surface and the cutting edge surface is parabolic.
Preferably, the side surface of the mounting body and the side surface of the cutter body are arranged up and down, and the boundary of the two is parabolic; the curved surface of the edge part of the installation body and the knife edge surface are arranged up and down, and the boundary of the curved surface and the knife edge surface is parabolic; the edge plane of the mounting body and the edge plane of the knife blade are arranged up and down, and the junction of the edge plane of the mounting body and the edge plane of the knife blade is a point.
Preferably, the bottom surface of the mounting body and the top surface of the cutter body are completely coincident.
Preferably, the ditching blade is made of high manganese steel as a whole.
Compared with the prior art, the utility model has the beneficial effects that:
(1) The method is suitable for the natural grassland surface layer in the high-altitude cold area, solves the ditching problem of the cobble intensive surface layer with larger gravel scale and intensive distribution, and has great significance for ecological protection and construction engineering of the high-altitude natural grassland.
(2) The ditching blade provided by the utility model has the advantages of uniform ditching depth and ditching width, wide application range and continuous ditching process.
(3) The parabolic blade surface shape has gradual change, so that the ditching blade has a self-protection function under severe impact, and the impact resistance of the ditching blade is improved.
(4) The ditching blade provided by the utility model has high durability, normal use of the ditching blade is not affected in the surface layer of the pure cobble, and the blade surface has a collision self-protection function.
Drawings
FIG. 1 is a front view of a trenching blade for use in a pebble-dense subsurface.
FIG. 2 is a right side view of a trenching blade suitable for use in pebble dense ground surfaces in accordance with the present utility model.
Detailed Description
The present utility model will be described in detail below with reference to the drawings and the specific embodiments thereof, which are for explanation of the present utility model only, but not for limitation of the present utility model.
The utility model discloses a ditching blade suitable for a cobble intensive ground surface layer, which comprises two parts, namely a mounting body and a cutter body, wherein the mounting body is an area surrounded by sixteen surfaces, namely a top surface of the mounting body, four side surfaces of the mounting body, four side curved surfaces of the mounting body, four side plane surfaces of the mounting body, a bottom surface of the mounting body, two cylindrical surfaces and the like; the cutter body is an area surrounded by six surfaces, namely a cutter body top surface, four cutter body side surfaces, a cutter blade surface and the like. The ditching blade is formed by subtracting an internal containing area of two cylindrical surfaces from an internal area surrounded by eighteen surfaces such as a top surface of a mounting body, four side surfaces of the cutter body, a cutter blade surface and the like.
FIG. 1 is a front view (X-Y) of a trenching blade, with the principal point coordinates characterizing the shape and position of the trenching blade as follows: o (0, 0), K (0, 3), A (-40, 60), B (-38.99,60), C (38.99, 60), D (40, 60), G (0, 60), E (-30.25, 90), H (0, 90), F (30.25, 90), O 1 (-15，75)、O 2 (15, 75). FIG. 2 is a right side view (Z-Y) of the trenching blade, with the principal point coordinates characterizing the shape and position of the trenching blade as follows: o '(0, 0), K' (-1.5,3), K "(1.5,3), G '(-7.5, 60), G" (7.5, 60), C' (-1.5, 60), C "(1.5, 60), D '(0, 60), F' (-5, 90), F" (5, 90). The above coordinate units are all in millimeters. The ditching blade is symmetrical in the front view and the right view along the Y-axis, and for convenience in describing the constitution, the position and the connection relation of each part of the ditching blade, only the part of the ditching blade located in the first quadrant of the front view and the first quadrant of the right view is described.
The top surface of the mounting body (HF in FIG. 1, L 'F' in FIG. 2) is a plane perpendicular to the Y-axis and is in the region where (Y (x) = 60,0.ltoreq.x.ltoreq.30, 0.ltoreq.z.ltoreq.7.5).
The side of the installation body (HGCF in FIG. 1, F ' C ' G ' in FIG. 2) is a curved surface, four sides of the curved surface are three straight lines and a parabola, and the curved equations are respectively straight line HF (y=90, z=5, 0.ltoreq.x.ltoreq.40), straight line HG (y (z) = -12z+150, x=0, 60.ltoreq.y.ltoreq.90), straight line FC (y (x) = -3.337x+190.111, 30.ltoreq.x.ltoreq.38.99, y (z) = 24.857z-34.286,1.5.ltoreq.z.ltoreq.5) and parabola GC (x= -0.722 z) 2 +40.615，y＝60，1.5≤z≤7.5)。
The curved surface of the side of the installation body (FCD in FIG. 1, F ' C ' D ' in FIG. 2) is a curved surface, three sides of the curved surface are two straight lines and a parabola, and the curve equations are respectively a straight line FC (y (x) = -3.337x+190.111, 30 +.38.99, y (z) = 24.857z-34.286,1.5 +.5), a straight line FD (y (x) = -3x+180, 30 +.40, y (z) = 6z+60,0 +.5) and a parabola CD (x (z) = -0.449 z) 2 +40，y＝60,0≤z≤1.5)。
The mounting body side plane (FD in fig. 1, F 'D' L 'in fig. 2) is a plane, and three sides of the plane are straight lines, and the curve equations of the plane are respectively a straight line FD (y (x) = -3x+180, 30 x.ltoreq.40, y (z) = 6z+60, 0.ltoreq.z.ltoreq.5), a straight line L' D '(y (x) = -3x+180, 30 x.ltoreq.40, 60 y.ltoreq.90, z=0), and a straight line L' F "(y=90, x=30, 0.ltoreq.z.ltoreq.5). The angle between the mounting body edge plane and the Y-axis is set to 18 degrees.
The bottom surface of the installation body (GCD in FIG. 1 and D ' G ' in FIG. 2) is a plane, four sides of the plane are two straight lines and two parabolas, and the curve equations of the plane are respectively a straight line GD (y= 60,0. Ltoreq.x.ltoreq.40, z=0), a straight line D ' G "(y= 60,0. Ltoreq.z.ltoreq.7.5, x=0), a parabola CD (x (z) = -0.449z2+40, y= 60,0. Ltoreq.z.ltoreq.1.5) and a parabola GC (x= -0.722 z) 2 +40.615，y＝60，1.5≤z≤7.5)。
Said cylindrical surface (circle O in fig. 1) 2 ) The equation of (2) is: (x-15) 2 +(y-75) 2 =100, 70+.y+.80, cylinder centerline (x=15, y= 75,0 +.z+.6.25). The area contained in the cylindrical surface is arranged in a hollow mode, and the ditching blade can be mounted through bolts.
The top surface of the cutter body (GCD in fig. 1 and D ' G ' in fig. 2) is a plane, four sides of the plane are two straight lines and two parabolas, and the curve equations of the plane are a straight line GD (y= 60,0. Ltoreq.x.ltoreq.40, z=0), a straight line D ' G "(y= 60,0. Ltoreq.z.ltoreq.7.5, x=0) and a parabola CD (x (z) = -0.449 z) respectively 2 +40, y= 60,0.ltoreq.z.ltoreq.1.5), parabolic GC (x= -0.722 z) 2 +40.615，y＝60，1.5≤z≤7.5)。
The side surface (GKC in fig. 1 and G "K" C "in fig. 2) of the cutter body is a curved surface, three sides of the curved surface are parabolic, and the curve equations are parabolic GC (x= -0.722 z) 2 +40.615, y=60, 1.5.ltoreq.z.ltoreq.7.5), parabolic G 'K' (y (z) =66.5 z 2 140.625,3 y 60,1.5 z 7.5), and parabolic CK (y (x) =0.0375 x) 2 +3，y(z)＝9.5z-11.25，0≤x≤38.99)。
The edge surface (KODC in FIG. 1 and L ' O ' K ' C in FIG. 2) is a paraboloid, four sides of the curve are parabolas, and the curve equations are parabolas respectivelyObject line CK (y (x) =0.0375 x 2 +3, y (z) =9.5 z-11.25,0. Ltoreq.x.ltoreq. 38.99), parabolic curve O 'K' (y (z) =1.333 z 2 X=0, 0.ltoreq.z.ltoreq.1.5), parabolic OD (y (x) =0.0375 x) 2 Y is more than or equal to 0 and less than or equal to 60, z=0), and parabola CD (x (z) = -0.449z 2 +40,y＝60，0≤z≤1.5)。
Straight line HF, point F and straight line L 'F' are the junctions of the top surface of the installation body, the side surface of the installation body, the curved surface of the edge of the installation body and the plane of the edge of the installation body respectively. The side face of the installation body, the curved face of the edge of the installation body and the plane of the edge of the installation body are sequentially and horizontally arranged, the juncture of the side face of the installation body and the curved face of the edge of the installation body is a straight line FC, and the juncture of the curved face of the edge of the installation body and the plane of the edge of the installation body is a straight line FD. The ditching blade is made of high manganese steel integrally.
The side surface of the cutter body and the cutting edge surface are horizontally arranged, and the boundary of the side surface and the cutting edge surface is parabolic CK. The side surface of the mounting body and the side surface of the cutter body are arranged up and down, and the boundary of the side surface of the mounting body and the side surface of the cutter body is parabolic GC. The curved surface of the edge part of the installation body and the knife edge surface are arranged up and down, and the boundary of the curved surface and the knife edge surface is parabolic CD. The edge plane of the mounting body and the edge plane of the knife blade are arranged up and down, and the junction of the two is point D. The bottom surface of the mounting body and the top surface of the cutter body are completely overlapped.
Example 1
In this embodiment, 10 ditching blades are mounted on a flange plate by 20 bolts, the flange plate is welded on a rotating shaft of a ditcher, the advancing speed of the ditcher is set to 10 km/h, and the rotating shaft rotating speed is set to 700 rpm. The ditching effect test is carried out on the surface layer of the cobble intensive grassland (the distribution density of large cobbles with average diameters exceeding 30 cm exceeds 2.5 pieces/cubic meter within 10 cm below the ground, the distribution density of small cobbles with average diameters ranging from 3 cm to 30 cm exceeds 3000 pieces/cubic meter), the ditching distance is 100 meters, the position change condition of the large cobbles under the action of ditching blades is observed in the test, statistics is carried out after the test, and 30 points are randomly selected for ditching depth and width measurement after the test. The test results are shown in tables 1 to 3:
table 1 statistics of the values of the depths of ditches for 30 points (unit: mm) were randomly selected
Table 2 statistical table of ditching width values (unit: mm) for randomly selecting 30 points
TABLE 3 statistics of large cobbles
The ditching effect test data show that: the ditching effect test is carried out on the surface layer of the cobble intensive grassland, and the ditching blade of the embodiment is adopted, so that the remarkable technical effect is achieved: in the ditching depth and width measurement values of 30 points selected randomly, the average ditching depth is 45.3 millimeters, the maximum ditching depth is 69 millimeters, the minimum ditching depth is 31 millimeters, and the ditching depth of 80 percent of points is within the range of 45+/-10 millimeters, which indicates that the ditching depth is uniform; the average ditching width is 12.3 mm, the maximum ditching width is 16 mm, the minimum ditching width is 10 mm, and the ditching width of 90% points is within the range of 12+/-2 mm, which indicates that the ditching width is uniform.
The number of large cobbles encountered in the test amounted to 9, 7 of which were moved and 2 of which were removed from the ground surface. When a small part of the large cobbles are under the ground, the large cobbles rotate and move to be taken out of the ground under the collision action of the ditching blades, and the ditching blades continue ditching; when most or all of the large cobbles are positioned below the ground surface layer, the large cobbles cannot be moved by the ditching blade, and the parabolic knife edge surface of the ditching blade enables the large cobbles to be extruded to rotate when being collided, so that a certain space is reserved, and the ditching blade continues ditching. The parabolic blade surface shape has gradual change, so that the ditching blade has a self-protection function under severe impact, and the impact resistance of the ditching blade is improved.
Example 2
In this embodiment, the number and mounting manner of the ditching blades are the same as those of embodiment 1, except that: in this example, the impact durability test of the ditching blade and the cobble is performed on the surface layer of the pure cobble, and the test distance is 50 km. And checking the damage condition of the ditching blade after the test. The test results obtained are shown in Table 4:
table 4 statistics of damage to the blades of the furrows
The crash durability test data shows that: the ditching blade adopted in the embodiment performs a 50 km collision test with cobbles in the surface layer of the pure cobbles, and has the remarkable technical effect: in the 10 ditching blades tested, the situation of scrapping due to the fracture of the ditching blade does not occur, only the cutting edges of 1 ditching blade are damaged, and slight scratches appear on the side faces of the cutter bodies of all ditching blades, but the normal use of the ditching blades is not affected, and the durability of the ditching blades is proved to be high.
The test results above, thanks to the parabolic design of the blade face and the blade side of the blade, allow the shape of the blade face and the blade side to be gradually modified. When the edge surface of the cutter body meets large cobbles, the large cobbles can rotate under the action of the gradually-changed cutter edge surface when the large cobbles cannot be moved, so that the normal operation of ditching is ensured, and the cutter edge surface has a collision self-protection function under the condition that the normal operation is not influenced; the scratch on the side surface of the cutter body is formed under the extrusion and friction action after the side surface of the cutter body contacts with cobblestones, is a metal abrasion problem, and belongs to a normal phenomenon.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the utility model, but any modifications, equivalents, and improvements made within the spirit and principle of the present utility model should be included in the scope of the present utility model.
Claims (5)
1. Ditching blade suitable for cobble intensive ground surface layer, including installation body and cutter body two parts, its characterized in that: the mounting body and the cutter body are distributed up and down and are connected into a whole; the installation body comprises an installation body top surface, four installation body side surfaces, four installation body side curved surfaces, four installation body side planes and an area surrounded by an installation body bottom surface; the cutter body comprises a cutter body top surface, four cutter body side surfaces and a region surrounded by a cutter blade surface;
the top surface of the installation body is a plane and is positioned at the uppermost part of the ditching blade; the side surface of the installation body is a curved surface, and the curved surface is provided with four sides, including three straight lines and a parabola; the curved surface of the side part of the installation body is a curved surface, and the curved surface is provided with three sides and comprises two straight lines and a parabola; the plane of the side part of the installation body is a plane, the plane is provided with three sides, and the three sides are all straight lines; the bottom surface of the installation body is a plane, and the plane is provided with four sides and comprises two straight lines and two parabolas;
the side face of the installation body, the curved face of the edge of the installation body and the plane of the edge of the installation body which are positioned on the same side are sequentially and horizontally arranged, wherein the juncture of the side face of the installation body and the curved face of the edge of the installation body is a straight line, and the juncture of the curved face of the edge of the installation body and the plane of the edge of the installation body is a straight line;
the junction between the top surface of the installation body and the side surface of the installation body, the curved surface of the edge part of the installation body and the plane of the edge part of the installation body on the same side is a straight line, a point and a straight line respectively;
the top surface of the cutter body is a plane, and the plane is provided with four sides and comprises two straight lines and two parabolas; the side surface of the cutter body is a curved surface, the curved surface is provided with three sides, and the three sides are parabolic; the cutting edge surface is a paraboloid, and the section shape of the paraboloid is parabolic;
the side face of the cutter body and the cutting edge face on the same side are horizontally arranged, and the boundary of the cutter body and the cutting edge face is parabolic.
2. A trenching blade for cobble-intensive subsurface as claimed in claim 1 wherein: two cylindrical holes are formed in the side faces of the mounting body and are respectively located in the middle positions of the side faces of the two opposite mounting bodies and used for mounting the ditching blades in corresponding ditching devices.
3. A trenching blade for cobble-intensive subsurface as claimed in claim 1 wherein: the side surface of the mounting body and the side surface of the cutter body are arranged up and down, and the juncture of the side surface of the mounting body and the side surface of the cutter body is parabolic; the curved surface of the edge part of the installation body and the knife edge surface are arranged up and down, and the boundary of the curved surface and the knife edge surface is parabolic; the edge plane of the mounting body and the edge plane of the knife blade are arranged up and down, and the junction of the edge plane of the mounting body and the edge plane of the knife blade is a point.
4. A trenching blade for cobble-intensive subsurface as claimed in claim 1 wherein: the bottom surface of the installation body and the top surface of the cutter body are completely overlapped.
5. A trenching blade for pebble-dense land surfaces as defined in any one of claims 1 to 4 wherein: the ditching blade is made of high manganese steel integrally.
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| CN201910309094.3A CN109892070B (en) | 2019-04-17 | 2019-04-17 | Ditching blade suitable for cobble intensive ground surface layer |
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| CN201910309094.3A CN109892070B (en) | 2019-04-17 | 2019-04-17 | Ditching blade suitable for cobble intensive ground surface layer |
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| CN109892070B true CN109892070B (en) | 2023-09-05 |
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