A multi-stage progressive cutting weeding knife

Abstract

The present application relates to the field of agricultural machinery and gardening technology, and discloses a multi-section progressive cutting weeding knife, which comprises a device rack, a driving engine fixedly connected to the top of the device rack, a driving belt pulley fixedly connected to the output end of the driving engine, a belt sleeved on the outer side of the driving belt pulley, a transmission belt pulley, the front end of the belt being sleeved on the transmission belt pulley, an adjustable cutter assembly fixedly connected to the inner side of the transmission belt pulley, an installation cavity formed in the front of the device rack, and the adjustable cutter assembly fixedly connected to the inner side of the installation cavity, a plurality of tool holders fixedly connected to the outer side of the main shaft and staggered at a certain angle, so that the adjacent tool sections form a composite structure of progressive stagger of axial rotation radius and stagger of axial angle deflection, the multi-section tool sections are sequentially touched down, the axial angle is evenly distributed, the cutting load is evenly distributed along the axial direction of the tool shaft, the unilateral eccentric load is eliminated, the wear of the tool shaft bearing is reduced, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery and gardening technology, specifically a weeding knife with multi-stage progressive cutting. Background Technology

[0002] Currently, handheld or walk-behind weeding tools are commonly used in agriculture, landscaping, and greening maintenance, and are widely applied in tasks such as clearing weeds in fields and pruning green belts. Most existing weeding tools employ a single-axis, single-row blade structure or a multi-blade structure with fixed spacing, and their cutting method is primarily rotary chopping.

[0003] However, common cutting-type weeding knives are made of one-piece blades. When rotating, all parts of the blade edge touch the ground at the same time, resulting in concentrated cutting load. This can easily cause uneven load on one side of the blade shaft, accelerated bearing wear, and a short service life for the equipment. The blades are made of straight blades or ordinary cutting methods. The impact stress of chopping cutting is large, the blades wear quickly, and the service life is short. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-stage progressive cutting weeding knife in order to solve the problems mentioned above.

[0005] The technical solution adopted in this invention is as follows: A multi-stage progressive cutting weeding knife includes a device frame, a drive motor is fixedly connected to the top of the device frame, a drive pulley is fixedly connected to the output end of the drive motor, a belt is sleeved on the outer side of the drive pulley, the front end of the belt is sleeved on a transmission pulley, an adjustable blade assembly is fixedly connected to the inner side of the transmission pulley, and a mounting cavity is opened at the front of the device frame, with the adjustable blade assembly fixedly connected to the inner side of the mounting cavity.

[0006] By adopting the above technical solution, during the operation of the equipment, a central tool post, two sets of side tool posts, and two sets of edge tool posts are fixedly connected to the outside of the spindle. The side tool post mounting blocks fixed to the outside of the side tool posts are staggered at a certain angle from the central tool post and the edge tool post mounting blocks fixed to the outside of the edge tool posts. This makes the tool inserts W-shaped after installation, thereby forming a composite structure of progressively staggered axial rotation radius and axial angle deflection between adjacent tool segments. This achieves the timing difference of multiple tool segments touching the ground and uniform distribution of cutting load along the tool shaft axis through axial angle, eliminating unilateral load, reducing tool shaft bearing wear, and improving the service life of the equipment.

[0007] By using a beveled blade that matches the direction of rotation, and combining this with a timing-based ground contact to form a shearing cut, the impact stress on the cutting edge is reduced. This fundamentally changes the working mechanism from "chopping" to "cutting," reducing blade wear, increasing blade life, and improving the efficiency of the equipment.

[0008] In a preferred embodiment, the adjustable tool assembly includes a spindle, a central tool post, a side tool post, an edge tool post, an edge tool post mounting block, an edge tool post mounting block, a central tool post mounting block, tool post mounting block bolt holes, a cutting tool, and a cutting tool mounting hole; The spindle is fixedly connected to a central tool post, two sets of side tool posts, and two sets of edge tool posts. The central tool post is located at the center of the spindle, and the side tool posts are located between the central tool post and the edge tool posts. The two sets of side tool posts and the two sets of edge tool posts are symmetrically arranged about the central tool post. A central tool post mounting block, a side tool post mounting block, and an edge tool post mounting block are fixedly arranged axially on the outer sides of the central tool post, the side tool post, and the edge tool post. Blades are fixedly connected to the outer sides of the central tool post mounting block, the side tool post mounting block, and the edge tool post mounting block through the tool post mounting block bolt holes and the blade mounting holes.

[0009] By adopting the above technical solution, and by forming a composite structure of progressively staggered axial rotation radius and staggered axial angle between adjacent tool segments, the timing difference of multiple tool segments is grounded, and the cutting load is evenly distributed along the tool shaft axis through uniform axial angle distribution, thereby eliminating unilateral load, reducing tool shaft bearing wear, and improving the service life of the equipment.

[0010] In a preferred embodiment, bearings are fixedly connected to both ends of the spindle, and the outer side of the bearings is fixedly connected to the side wall of the mounting cavity.

[0011] By adopting the above technical solution and installing bearings at the connection between the spindle and the mounting cavity, the stable and flexible operation of the equipment can be guaranteed.

[0012] In a preferred embodiment, the intermediate tool holder mounting block and the side tool holder mounting block fixed to the outside of the intermediate tool holder and the side tool holder are set at the same angle, and the side tool holder mounting block fixed to the outside of the side tool holder is set at a certain angle to the intermediate tool holder mounting block and the side tool holder mounting block fixed to the outside of the intermediate tool holder and the side tool holder.

[0013] By adopting the above technical solution, the intermediate tool holder mounting block and the side tool holder mounting block, which are fixed to the outside of the intermediate tool holder and the side tool holder, are set at a certain angle and staggered. This creates a composite structure of progressively staggered axial rotation radius and axial angle deflection between adjacent tool segments. This achieves the timing difference of multiple tool segments touching the ground and improves the service life of the equipment by uniformly distributing the axial angle.

[0014] In a preferred embodiment, the blade has a beveled edge that matches the direction of rotation.

[0015] By adopting the above technical solution, the blade has an oblique edge that matches the rotation direction, and the timing of the contact with the ground forms a shearing cut, reducing the impact stress on the cutting edge. This fundamentally changes the working mechanism from "chopping" to "cutting", reducing blade wear, increasing blade life, and improving the efficiency of the equipment.

[0016] In a preferred embodiment, the blade is mounted in a W-shape on the intermediate tool holder mounting block, the side tool holder mounting block, and the edge tool holder mounting block.

[0017] By adopting the above technical solution, and by installing the blade in a W shape, the blade gradually touches the ground during rotation, cutting the ground, and the lateral displacement forces generated are exactly opposite and can cancel each other out.

[0018] In a preferred embodiment, an oil tank is fixedly connected above the drive engine, and an oil filler port is provided above the oil tank. A sealing cap is threadedly connected to the outside of the oil filler port.

[0019] By adopting the above technical solution, it is convenient to add oil to the oil tank, ensuring the stable operation of the drive engine and providing power to the equipment.

[0020] In a preferred embodiment, the equipment frame is also provided with casters on both sides.

[0021] By adopting the above technical solution, the overall device can be easily turned and moved.

[0022] In a preferred embodiment, a hand handle is fixedly connected to the back side of the equipment frame, and an accelerator handle and a brake handle are respectively provided at the ends of the hand handle.

[0023] By adopting the above technical solution and installing throttle and brake levers on the handlebars, operators can easily control the start and stop of the equipment, thus improving safety.

[0024] In a preferred embodiment, the blade is detachably connected to the intermediate blade holder mounting block, the side blade holder mounting block, and the edge blade holder mounting block by bolts. The blade is made of high carbon steel and has a wear-resistant coating on its surface.

[0025] By adopting the above technical solution, the blade can be detached and installed, which facilitates the replacement and maintenance of the blade. Furthermore, the blade is made of high carbon steel and has a wear-resistant coating on its surface, which improves the overall strength and wear resistance of the blade and extends its life.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: During operation, the equipment is equipped with a central tool post, two sets of side tool posts, and two sets of edge tool posts fixedly connected to the outside of the spindle. The side tool post mounting blocks fixed to the outside of the side tool posts are offset at a certain angle from the central tool post and the edge tool post mounting blocks fixed to the outside of the edge tool posts. This results in the cutting blades being W-shaped after installation. Consequently, adjacent tool segments form a composite structure of progressively misaligned axial rotation radii and axial angle deflection. This achieves timing difference contact between multiple tool segments and uniform distribution of cutting load along the tool shaft axis through axial angle, eliminating unilateral load distribution, reducing tool shaft bearing wear, and improving the service life of the equipment.

[0027] By using a beveled blade that matches the direction of rotation, and combining this with a timing-based ground contact to form a shearing cut, the impact stress on the cutting edge is reduced. This fundamentally changes the working mechanism from "chopping" to "cutting," reducing blade wear, increasing blade life, and improving the efficiency of the equipment. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a schematic diagram of the adjustable tool assembly tool holder mounting structure in the device of the present invention; Figure 3 This is a schematic diagram of the adjustable tool assembly structure in the device of the present invention; Figure 4 This is a schematic diagram of the blade structure of the device in this invention.

[0029] The markings in the diagram are: 1. Equipment frame; 2. Drive engine; 3. Drive pulley; 4. Belt; 5. Transmission pulley; 6. Mounting cavity; 7. Adjustable tool assembly; 701. Spindle; 702. Intermediate tool post; 703. Side tool post; 704. Side tool post; 705. Side tool post mounting block; 706. Side tool post mounting block; 707. Intermediate tool post mounting block; 708. Tool post mounting block bolt holes; 709. Blade; 7010. Blade mounting hole; 8. Oil tank; 9. Oil filler port; 10. Casters; 11. Hand handle; 12. Bearing. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example: Reference Figure 1-4A multi-stage progressive cutting weeding knife includes a frame 1, a drive engine 2 fixedly connected to the top of the frame 1, a drive pulley 3 fixedly connected to the output end of the drive engine 2, a belt 4 sleeved on the outer side of the drive pulley 3, the front end of the belt 4 sleeved on the transmission pulley 5, an adjustable blade assembly 7 fixedly connected to the inner side of the transmission pulley 5, and a mounting cavity 6 opened at the front of the frame 1, with the adjustable blade assembly 7 fixedly connected to the inner side of the mounting cavity 6.

[0032] During operation, the equipment is fixedly connected to the outside of the spindle 701 by an intermediate tool post 702, two sets of side tool posts 703, and two sets of edge tool posts 704. The side tool post mounting block 706 fixed to the outside of the side tool post 703 is set at a certain angle to the intermediate tool post mounting block 707 and the edge tool post mounting block 705 fixed to the outside of the intermediate tool post 702 and the edge tool post 704. After the cutting tool 709 is installed, it is W-shaped. This creates a composite structure of progressive misalignment of axial rotation radius and axial angle deflection between adjacent tool segments. This achieves the timing difference of multiple tool segments touching the ground and uniform distribution of cutting load along the tool shaft axis through axial angle, eliminating unilateral load, reducing tool shaft bearing wear, and improving the service life of the equipment.

[0033] By employing a beveled edge that matches the direction of rotation in the blade 709, and combining this with a timing-based ground contact to form a shearing cutting action, the impact stress on the cutting edge is reduced. This fundamentally changes the working mechanism from "chopping" to "cutting," reducing the wear of the blade 709, extending its service life, and improving the efficiency of the equipment.

[0034] The adjustable tool assembly 7 includes a spindle 701, an intermediate tool post 702, a side tool post 703, a side tool post 704, a side tool post mounting block 705, a side tool post mounting block 706, an intermediate tool post mounting block 707, a tool post mounting block bolt hole 708, a cutting tool 709, and a cutting tool mounting hole 7010. The spindle 701 is fixedly connected to an intermediate tool post 702, two sets of side tool posts 703, and two sets of edge tool posts 704. The intermediate tool post 702 is located at the center of the spindle 701, and the side tool posts 703 are located between the intermediate tool post 702 and the edge tool posts 704. The two sets of side tool posts 703 and the two sets of edge tool posts 704 are symmetrically arranged about the intermediate tool post 702. The intermediate tool post 702, the side tool posts 703, and the edge tool posts 704 are respectively fixedly installed along the axial direction on the outer side of the intermediate tool post 702, the side tool post 703, and the edge tool post 704. The outer side of the intermediate tool post 707, the side tool post 706, and the edge tool post 705 are fixedly connected to the blades 709 by bolts through the tool post mounting block bolt holes 708 and the blade mounting holes 7010.

[0035] By adopting the above technical solution, and by forming a composite structure of progressively staggered axial rotation radius and staggered axial angle between adjacent tool segments, the timing difference of multiple tool segments is grounded, and the cutting load is evenly distributed along the tool shaft axis through uniform axial angle distribution, thereby eliminating unilateral load, reducing tool shaft bearing wear, and improving the service life of the equipment.

[0036] In a preferred embodiment, bearings 12 are fixedly connected to both ends of the spindle 701, and the outer side of the bearings 12 is fixedly connected to the side wall of the mounting cavity 6. By providing bearings at the connection between the spindle 12 and the mounting cavity 6, stable and flexible operation of the equipment can be ensured.

[0037] The intermediate tool holder 702 and the side tool holder 704 are fixed at the same angle to the outer sides of the intermediate tool holder 707 and the side tool holder 704. The side tool holder 706 is fixed at a certain angle to the outer side of the side tool holder 703. This angled arrangement of the intermediate tool holder 707 and the side tool holder 705 to the outer sides of the intermediate tool holder 702 and the side tool holder 704 creates a composite structure of progressively misaligned axial rotation radii and axial angle deflection between adjacent tool segments. This achieves timing differences in the contact points between multiple tool segments and, through uniform axial angle distribution, improves the service life of the equipment.

[0038] The blade 709 has a beveled edge that matches the direction of rotation. By having a beveled edge that matches the direction of rotation, the blade 709 forms a shearing cut when it touches the ground in sequence, reducing the impact stress on the cutting edge and fundamentally changing the working mechanism from "chopping" to "cutting". This reduces the wear of the blade 709, increases its service life, and improves the efficiency of the equipment.

[0039] The blade 709 is mounted in a W-shape on the intermediate tool holder mounting block 707, the side tool holder mounting block 706, and the edge tool holder mounting block 705. By mounting the blade in a W-shape, the cutting edge gradually touches the ground during rotation, cutting the ground, and the lateral displacement forces generated are exactly opposite, which can cancel each other out.

[0040] An oil tank 8 is fixedly connected to the top of the drive engine 2. An oil filler port 9 is located on the top of the oil tank 8, and a sealing cap is threaded onto the outside of the oil filler port 9. This facilitates the addition of oil to the tank, ensuring the stable operation of the drive engine and providing power to the equipment.

[0041] The equipment frame 1 is also equipped with casters 10 on both sides, which facilitates the turning and movement of the entire device.

[0042] A handle 11 is fixedly connected to the back side of the equipment frame 1, and an accelerator handle and a brake handle are respectively provided at the ends of the handle 11. By installing accelerator and brake handles on the handle 11, it is convenient for operators to control the start and stop of the equipment, thus improving the safety of use.

[0043] The blade 709 is detachably connected to the intermediate tool holder mounting block 707, the side tool holder mounting block 706, and the edge tool holder mounting block 705 via bolts. The blade 709 is made of high-carbon steel and has a wear-resistant coating on its surface. The detachable installation of the blade 709 facilitates its replacement and maintenance. Furthermore, the use of high-carbon steel and the wear-resistant coating improves the overall strength and wear resistance of the blade 709, extending its lifespan.

[0044] The implementation principle of a multi-segment progressive cutting weeding knife according to the present invention is as follows: First, the blade 709 is bolted to the 708 cut into 707, 706, and 705 via 7010. The side blade holder mounting block 706 fixed to the outside of the side blade holder 703 is staggered at a certain angle from the middle blade holder 702 and the side blade holder mounting blocks 707 and 705 fixed to the outside of the side blade holder 704. After the blade 709 is installed, it is W-shaped, thereby forming a composite structure of progressively staggered axial rotation radius and axial angle deflection between adjacent blade segments. This achieves the timing difference of the multi-segment blade contact with the ground and uniform distribution of the axial angle, so that the cutting load is evenly distributed along the blade shaft axis, eliminating unilateral load, reducing wear of the blade shaft bearing, and improving the service life of the equipment.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A weeding knife with multi-stage progressive cutting, characterized in that: The equipment includes a frame (1), a drive engine (2) is fixedly connected to the top of the frame (1), a drive pulley (3) is fixedly connected to the output end of the drive engine (2), a belt (4) is sleeved on the outside of the drive pulley (3), the front end of the belt (4) is sleeved on the transmission pulley (5), an adjustable tool assembly (7) is fixedly connected to the inside of the transmission pulley (5), and an installation cavity (6) is opened at the front of the frame (1), an adjustable tool assembly (7) is fixedly connected to the inside of the installation cavity (6).

2. The weeding knife with multi-stage progressive cutting as described in claim 1, characterized in that: The adjustable tool assembly (7) includes a spindle (701), a central tool post (702), a side tool post (703), a side tool post (704), a side tool post mounting block (705), a side tool post mounting block (706), a central tool post mounting block (707), a tool post mounting block bolt hole (708), a cutting tool (709), and a cutting tool mounting hole (7010). The spindle (701) is fixedly connected to an outer side with a central tool post (702), two sets of side tool posts (703), and two sets of edge tool posts (704). The central tool post (702) is located at the center of the spindle (701), and the side tool posts (703) are located between the central tool post (702) and the edge tool posts (704). The two sets of side tool posts (703) and the two sets of edge tool posts (704) are symmetrically arranged about the central tool post (702). The outer sides of the frame (702), side tool holder (703), and side tool holder (704) are respectively fixedly provided with a middle tool holder mounting block (707), a side tool holder mounting block (706), and a side tool holder mounting block (705) along the axial direction. The outer sides of the middle tool holder mounting block (707), side tool holder mounting block (706), and side tool holder mounting block (705) are fixedly connected with blades (709) through the tool holder mounting block bolt holes (708) and blade mounting holes (7010).

3. A weeding knife with multi-stage progressive cutting as described in claim 2, characterized in that: Both ends of the main shaft (701) are fixedly connected to bearings (12), and the outer side of the bearings (12) is fixedly connected to the side wall of the mounting cavity (6).

4. A weeding knife with multi-stage progressive cutting as described in claim 2, characterized in that: The intermediate tool holder (702) and the side tool holder (704) are fixed at the same angle to the outside of the intermediate tool holder (702) and the side tool holder (704). The side tool holder (706) fixed at the outside of the side tool holder (703) is set at a certain angle to the intermediate tool holder (702) and the side tool holder (704) and the side tool holder (705).

5. A weeding knife with multi-stage progressive cutting as described in claim 2, characterized in that: The blade (709) has a beveled edge that matches the direction of rotation.

6. A weeding knife with multi-stage progressive cutting as described in claim 2, characterized in that: The blade (709) is mounted in a W shape on the intermediate tool holder mounting block (707), the side tool holder mounting block (706), and the edge tool holder mounting block (705).

7. A weeding knife with multi-stage progressive cutting as described in claim 1, characterized in that: An oil tank (8) is fixedly connected above the drive engine (2), and an oil filling port (9) is provided above the oil tank (8). A sealing cap is threadedly connected to the outside of the oil filling port (9).

8. A weeding knife with multi-stage progressive cutting as described in claim 1, characterized in that: The equipment frame (1) is also provided with casters (10) on both sides.

9. A weeding knife with multi-stage progressive cutting as described in claim 1, characterized in that: The back of the equipment frame (1) is fixedly connected to a hand handle (11), and the end of the hand handle (11) is respectively provided with an accelerator handle and a brake handle.

10. A weeding knife with multi-stage progressive cutting as described in claim 2, characterized in that: The blade (709) is detachably connected to the intermediate blade holder mounting block (707), the side blade holder mounting block (706), and the edge blade holder mounting block (705) by bolts. The blade (709) is made of high carbon steel and has a wear-resistant coating on its surface.

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