A lawn grass blade for low-noise cutting of lawn vegetation

Abstract

The present invention discloses a rolling grass blade for low-noise cutting of lawn vegetation, which includes a first hob holder, a fixing plate, a roller cutter and a second hob holder. The first hob holder is located opposite to the second hob holder. The fixing plate is located inside the first hob holder and the second hob holder, and the fixing plate is horizontally symmetric with the inside of the first hob holder and the second hob holder. The roller cutter is located between the first hob holder and the second hob holder. For this rolling grass blade for low-noise cutting of lawn vegetation, the honeycomb holes are the preliminary channels for the inflow of air, and they are distributed in a large number and at the same interval, which is convenient for stabilizing the air flow. Moreover, the steel mesh arranged on the surface can not only filter weeds, but also play an auxiliary cutting effect, increasing the cutting angle of the blade and avoiding the problem that it is difficult to cut due to the thin and short branches and stems of the vegetation.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical cutting tools, and particularly to a lawn rolling blade for low-noise cutting of lawn vegetation. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for the greening level of living and residential areas. Urban large-scale ecological green spaces, residential green spaces, road green spaces, etc. are increasing continuously. Therefore, various lawn mowing machines have been continuously introduced. Among them, the rotary mower (also called lawn trimmer, lawn mower) is favored by users due to its advantages such as light weight, small size, and flexible operation.

[0003] The principle of a lawn mower to achieve cutting is to roll up the grass through a rotary cutter, and the blades on the rotary cutter cut the weeds. The rotary cutter of the lawn mower includes a rotary cutter shaft, a cutter disc, and rotary blades. The assembly sequence of the rotary cutter is to first insert multiple cutter discs at intervals on the rotary cutter shaft and weld them in place, then insert the rotary blades into the slots of the cutter disc and weld them in place, and finally grind the cutting edges, and the rotary blades are spiral-shaped.

[0004] Since the rotary blades are spiral-shaped, there are relatively high requirements for the relative rotation angle between the cutter discs on the rotary cutter shaft to ensure that the rotary blades can be smoothly inserted into the slots of the cutter disc. Therefore, there are relatively high requirements for the positioning accuracy of the blades on the rotary cutter shaft. For this reason, the inventor previously designed a welding tooling for a lawn mowing rotary cutter, and its corresponding patent number is: 201611023786.4, and the publication date is: February 15, 2017. This welding tooling

[0005] includes a base and several support plates. The several support plates are vertically and equidistantly arranged on the base; a cutter disc positioning block is arranged on one side of each of the several support plates, and the cutter disc positioning block corresponds to a positioning hole; a main shaft positioning groove is arranged at the top of each of the several support plates; the several main shaft positioning grooves are all semi-circular grooves and are all on the same axis; after the projections of the several cutter disc positioning blocks onto the same plane are centered on the projection point of the center of the semi-circular groove on the same plane and are arranged in an array.

[0006] Through the above-mentioned welding tooling, the position and angle of the cutter head on the main shaft can be quickly positioned, and then the cutter head can be welded to the main shaft by manual welding. At the same time, the corresponding welding method is also given in this solution. However, it does not provide a method for welding the rolling cutter blades to the cutter head. This is because as long as the position of the cutter head on the main shaft is positioned, the rolling cutter blades are directly inserted into the slots on the cutter head, and then manual welding can be carried out. This is a relatively traditional and simple method without any innovation. However, long-term actual welding operations have shown that this method is extremely inconvenient. Not only is the efficiency low, but the welding quality is also difficult to guarantee. Often, secondary or even multiple reworks are required, and occasionally scrapping occurs. This is because the whole rolling cutter is cylindrical, and the rolling cutter blades are evenly distributed along the circumference on the cutter head. The space between adjacent rolling cutter blades is relatively narrow. It is extremely difficult for workers to hold the welding torch and carry out welding in such a small space. The vision is also severely blocked. In addition, since the rolling cutter blades are spiral-shaped, the welding torch also needs to continuously change the welding angle along with the weld seam direction, making the welding more difficult. Welding defects such as broken welds, welding beads, and uneven weld seams often occur, greatly reducing the quality of the rolling cutter products;

[0007] And during the use of the tool, the noise generated by the friction between the blade and the vegetation and its own rolling is too large, which will cause noise pollution to the surrounding area and affect the overall practicality of the tool. Summary of the Invention

[0008] The purpose of the present invention is to provide a rolling grass blade for low-noise cutting of lawn vegetation, so as to solve the problem that during the use of the tool, the noise generated by the friction between the blade and the vegetation and its own rolling is too large, which will cause noise pollution to the surrounding area as mentioned in the above background technology.

[0009] To achieve the above purpose, the present invention provides the following technical solution: A rolling grass blade for low-noise cutting of lawn vegetation, including a first rolling cutter holder, a fixing plate, a roller cutter, and a second rolling cutter holder. The first rolling cutter holder is located opposite to the second rolling cutter holder. The fixing plate is located inside the first rolling cutter holder and the second rolling cutter holder, and the fixing plate is horizontally symmetric with the inside of the first rolling cutter holder and the second rolling cutter holder. The roller cutter is located between the first rolling cutter holder and the second rolling cutter holder. The left and right ends of the roller cutter are symmetrically distributed with movable shafts. One end of the movable shaft is movably connected to the fixing plate, and a driven gear is provided on the outer surface of one end of the movable shaft;

[0010] A method for using a rolling grass blade for low-noise cutting of lawn vegetation further includes the following steps:

[0011] S1. The connecting shafts at both ends of the rolling grass blade are assembled in a movable installation manner. The holes opened at the connecting end positions are sealed by the connecting shafts. After the assembly is completed, the blades are annularly distributed between the cutter holders;

[0012] S2. As described in step S1, during the assembly process, engage the pinion gear on the outside of the connecting shaft and distribute them horizontally and evenly. Subsequently, mesh the pinion gear with a preset fixed bracket. The tool rest connected to the connecting shaft is fixedly connected to the external fixed bracket, so the pinion gear is meshed with the tool rest on the outside. The tool rest can rotate self - sufficiently, forming a speed - reducing structure;

[0013] S3. As described in step S2, driven by the outside tool rest to rotate, the blade rotates uniformly around the connecting shaft as the center point. The blades are distributed in 6 rings, and the rotation direction and speed are the same. The blade body edge is set in a spiral shape to reduce wind resistance and increase the cutting area;

[0014] S4. As described in step S3, when the blade rotates at too high a speed, the generated noise is absorbed and compensated by the internal sound - absorbing cavity under the influence of the air flow, and weakens in turn in a cycle and remains in a constant state to achieve the effect of reducing noise.

[0015] As a preferred technical solution of the present invention, the first hob rest and the second hob rest have the same structure, and the first hob rest and the second hob rest and the driven gear form a meshing transmission structure.

[0016] Adopting the above - mentioned technical solution, during the rotation of the first hob rest and the second hob rest, through meshing transmission with the driven gear, the roller hob is driven to rotate. A speed - reducing structure is formed therein, and only a large torque is required, and the roller hob can be driven to rotate at a high speed without the need for a high rotational speed of the driving member, thereby reducing the noise generated by the driving equipment.

[0017] As a preferred technical solution of the present invention, the driven gear is fixedly connected to the movable shaft, and the movable shaft is snap - fitted to the roller hob.

[0018] Adopting the above - mentioned technical solution, the connection relationship between the driven gear and the movable shaft makes their rotational speeds the same, facilitating linkage. And the connection method between the movable shaft and the roller hob is convenient for transmission, disassembly and assembly, convenient for maintenance, and also convenient for cleaning the internal cavity.

[0019] As a preferred technical solution of the present invention, the roller hobs are annularly distributed between the first hob rest and the second hob rest, and the outer surface of the roller hob is spirally distributed with cutting edges.

[0020] Adopting the above - mentioned technical solution, by arranging the roller hobs in a spiral shape, while increasing the cutting area, an annular self - winding noise - reduction effect is also formed, reducing the noise generated by friction and rotation.

[0021] As a preferred technical solution of the present invention, honeycomb holes are spirally and equally spaced inside the roller hob, and a steel mesh is arranged inside the honeycomb holes.

[0022] With the above technical solution, the honeycomb holes are the initial channels for the airflow to enter. They are relatively numerous in distribution and have the same spacing, which is convenient for stabilizing the airflow. Moreover, the steel mesh set on the surface can not only filter weeds but also assist in the cutting effect, increasing the cutting angle of the blade and avoiding the problem that the vegetation stems are too thin and short to be cut.

[0023] As a preferred technical solution of the present invention, a throttle tube is arranged in the middle of the roller cutter, and the throttle tube is in fitting connection with the movable shaft.

[0024] With the above technical solution, the throttle tube is the same as the air holes inside the roller cutter. The throttle tube serves as an intermediary for connecting the air holes and is sealed by the movable shaft. When separated from the movable shaft, the inside of the roller cutter can be cleaned of impurities by connecting an air pump, avoiding the problem that the noise reduction effect is affected by the accumulation of impurities during long-term use.

[0025] As a preferred technical solution of the present invention, sound-absorbing sheets are annularly distributed inside the roller cutter. An irregular groove is connected inside the sound-absorbing sheet, and the irregular groove is connected between adjacent sound-absorbing sheets.

[0026] With the above technical solution, the sound-absorbing sheets cooperate with the honeycomb holes to eliminate the sound of the gas during emission. And they communicate with each other through the irregular grooves, extending the gas emission distance, which can weaken the noise to the greatest extent and enhance the noise reduction effect.

[0027] As a preferred technical solution of the present invention, a cavity is arranged inside the roller cutter, and the cavity is respectively connected with the sound-absorbing sheets, the irregular grooves and the throttle tube.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: The lawn vegetation low-noise cutting roller grass blade:

[0029] 1. The honeycomb holes are the initial channels for the airflow to enter. They are relatively numerous in distribution and have the same spacing, which is convenient for stabilizing the airflow. Moreover, the steel mesh set on the surface can not only filter weeds but also assist in the cutting effect, increasing the cutting angle of the blade and avoiding the problem that the vegetation stems are too thin and short to be cut;

[0030] 2. The sound-absorbing sheets cooperate with the honeycomb holes to eliminate the sound of the gas during emission. And they communicate with each other through the irregular grooves, extending the gas emission distance, which can weaken the noise to the greatest extent and enhance the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic three-dimensional structure diagram of the whole of the present invention;

[0032] Figure 2 is a schematic three-dimensional structure diagram of the first roller cutter holder of the present invention;

[0033] Figure 3 is a schematic front view structure diagram of the roller cutter inside the present invention;

[0034] Figure 4 Schematic side view structure of the roller cutter inside the present invention;

[0035] Figure 5 Schematic three-dimensional cross-sectional structure of the roller cutter of the present invention.

[0036] In the figure: 1. First hob holder; 2. Fixed plate; 3. Movable shaft; 4. Driven gear; 5. Roller cutter; 6. Second hob holder; 7. Blade; 8. Inner cavity; 9. Throttle pipe; 10. Sound-absorbing sheet; 11. Special-shaped groove; 12. Honeycomb holes; 13. Steel mesh. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to Figures 1-5 , the present invention provides a technical solution: a lawn grass cutting blade for low-noise cutting of lawn vegetation, including a first hob holder 1, a fixed plate 2, a roller cutter 5 and a second hob holder 6. The first hob holder 1 is located opposite to the second hob holder 6. The fixed plate 2 is located inside the first hob holder 1 and the second hob holder 6, and the fixed plate 2 is horizontally symmetric with the inside of the first hob holder 1 and the second hob holder 6. The roller cutter 5 is located between the first hob holder 1 and the second hob holder 6. Movable shafts 3 are symmetrically distributed at the left and right ends of the roller cutter 5. One end of the movable shaft 3 is movably connected to the fixed plate 2, and a driven gear 4 is provided on the outer surface of one end of the movable shaft 3;

[0039] A method for using a lawn grass cutting blade for low-noise cutting of lawn vegetation further includes the following steps:

[0040] S1. The connecting shafts at both ends of the lawn grass cutting blade are assembled in a movable installation manner. The holes opened at the connecting end positions are sealed by the connecting shafts. After the assembly is completed, the blades are annularly distributed between the cutter holders;

[0041] S2. According to step S1, during the assembly process, a small gear is engaged with the outside of the connecting shaft and horizontally evenly distributed. Subsequently, the small gear is meshed with a preset fixed frame. The cutter holder connected to the connecting shaft is fixedly connected to the external fixed frame. Then the small gear is meshed with the outside cutter holder, and the cutter holder can rotate self, forming a speed reduction structure;

[0042] S3. According to step S2, it is driven by the outer tool rest to rotate. The blade rotates at a constant speed with the connecting shaft as the center point. The blades are distributed in 6 rings, and the rotation direction and speed are the same. The blade body edge is arranged in a spiral shape to reduce wind resistance and increase the cutting area;

[0043] S4. According to step S3, when the blade speed is too high, the generated noise is absorbed and compensated by the internal sound-absorbing cavity under the influence of the air flow, and weakens in turn and circulates, and is in a constant state to achieve the effect of reducing noise.

[0044] The first hob rest 1 and the second hob rest 6 have the same structure. The first hob rest 1 and the second hob rest 6 form a meshing transmission structure with the driven gear 4; during the rotation of the first hob rest 1 and the second hob rest 6, they drive the roller cutter 5 to rotate through meshing transmission with the driven gear 4. A deceleration structure is formed therein, and only a large torque is required, and the roller cutter 5 can be driven to rotate at a high speed without the need for a high speed of the driving part, thereby reducing the noise generated by the driving equipment.

[0045] The driven gear 4 is fixedly connected to the movable shaft 3, and the movable shaft 3 is snap-connected to the roller cutter 5; the connection relationship between the driven gear 4 and the movable shaft 3 makes the rotation speeds of the two the same, which is convenient for linkage. And the connection method of the movable shaft 3 and the roller cutter 5 is convenient for transmission, disassembly and assembly, convenient for maintenance, and also convenient for cleaning the internal cavity.

[0046] The roller cutters 5 are distributed in a ring between the first hob rest 1 and the second hob rest 6. The outer surface of the roller cutter 5 is spirally distributed with cutting edges 7; by arranging the roller cutters 5 in a spiral shape, while increasing the cutting area, a ring-shaped self-winding noise reduction effect is also formed, reducing the noise generated by friction and reducing the noise generated by rotation.

[0047] Honeycomb holes 12 are spirally and equally spaced inside the roller cutter 5, and a steel mesh 13 is arranged inside the honeycomb holes 12; the honeycomb holes 12 are the initial channels for air flow to enter, and the distribution quantity is large and the spacing is the same, which is convenient for stabilizing the air flow. And the steel mesh 13 arranged on the surface can not only filter weeds, but also play an auxiliary cutting effect, increasing the cutting angle of the blade and avoiding the problem that it is difficult to cut due to the thin and short branches and stems of vegetation.

[0048] A throttle pipe 9 is arranged in the middle of the roller cutter 5, and the throttle pipe 9 is in fit connection with the movable shaft 3; the throttle pipe 9 is the same as the air holes inside the roller cutter 5. The throttle pipe 9 serves as an air hole connection medium and is sealed by the movable shaft 3. When separated from the movable shaft 3, impurities inside the roller cutter 5 can be cleaned by connecting an air pump, avoiding the influence of accumulated impurities during long-term use on the noise reduction effect.

[0049] The inside of the roller cutter 5 is annularly distributed with sound-absorbing sheets 10. The inside of the sound-absorbing sheets 10 is connected with special-shaped grooves 11, and the special-shaped grooves 11 are connected between adjacent sound-absorbing sheets 10. The sound-absorbing sheets 10 cooperate with the honeycomb holes 12 to perform noise elimination and discharge of gas, and are communicated with the special-shaped grooves 11, extending the gas discharge distance, which can weaken the noise to the greatest extent and enhance the noise reduction effect.

[0050] The inside of the roller cutter 5 is provided with an inner cavity 8, and the inner cavity 8 is respectively connected with the sound-absorbing sheets 10, the special-shaped grooves 11 and the throttle pipe 9.

[0051] Working principle: First, preset the first hob holder 1 or the second hob holder 6 at the output end of the driving device. The driving device is a reduction motor with an arc-shaped guide rail. During the rotation of the first hob holder 1, it drives the roller cutter 5 connected to the movable shaft 3 to rotate by meshing with the driven gear 4. The roller cutter 5 and the driven gear 4 are annularly distributed, enabling the 6 second hob holders 6 to rotate synchronously at the same speed. The cutting work is carried out by the contact and friction between the cutting edges 7 and the vegetation. During the cutting work, by arranging the roller cutter 5 in a spiral shape, while increasing the cutting area, a circular self-winding noise reduction effect is also formed, reducing the noise generated by friction and the noise generated by rotation. Among them, the honeycomb holes 12 are the initial channels for the airflow to enter, and are distributed in a large number with the same spacing, facilitating the stabilization of the airflow. And the steel mesh 13 arranged on the surface can not only filter weeds, but also play an auxiliary cutting effect, increasing the cutting angle of the blade and avoiding the problem that it is difficult to cut due to the thin and short branches and stems of the vegetation. The throttle pipe 9 is the same as the internal air holes of the roller cutter 5. The throttle pipe 9 serves as an air hole connection medium and is sealed by the movable shaft 3. When separated from the movable shaft 3, the inside of the roller cutter 5 can be cleaned of impurities by connecting an air pump, avoiding the influence of accumulated impurities during long-term use on the noise reduction effect. The sound-absorbing sheets 10 cooperate with the honeycomb holes 12 to perform noise elimination and discharge of gas, and are communicated with the special-shaped grooves 11, extending the gas discharge distance, which can weaken the noise to the greatest extent and enhance the noise reduction effect.

[0052] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rolling lawn blade for low-noise cutting of lawn vegetation, characterized in that, It includes a first hob holder (1), a fixing plate (2), a roller cutter (5) and a second hob holder (6). The first hob holder (1) is located opposite to the second hob holder (6). The fixing plate (2) is located inside the first hob holder (1) and the second hob holder (6), and the fixing plate (2) is horizontally symmetric inside the first hob holder (1) and the second hob holder (6). The roller cutter (5) is located between the first hob holder (1) and the second hob holder (6). Moving shafts (3) are symmetrically distributed at the left and right ends of the roller cutter (5). One end of the moving shaft (3) is movably connected to the fixing plate (2), and a driven gear (4) is arranged on the outer surface of one end of the moving shaft (3). The first hob holder (1) and the second hob holder (6) have the same structure, and the first hob holder (1) and the second hob holder (6) and the driven gear (4) form a meshing transmission structure. The driven gear (4) is fixedly connected to the moving shaft (3), and the moving shaft (3) is snap-connected to the roller cutter (5). The roller cutter (5) is annularly distributed between the first hob holder (1) and the second hob holder (6), and cutting edges (7) are spirally distributed on the outer surface of the roller cutter (5). Honeycomb holes (12) are spirally and equally spaced inside the roller cutter (5), and a steel mesh (13) is arranged inside the honeycomb holes (12). S1. The moving shafts at both ends of the grass-rolling blade are assembled in a movable mounting manner. The holes opened at the connection ends are sealed by the moving shafts. After the assembly is completed, the blades are annularly distributed between the first hob holder and the second hob holder. S2. As described in step S1, during the assembly process, the driven gears are snap-fitted to the outside of the moving shafts and are horizontally and evenly distributed. Subsequently, the driven gears are meshed with the first hob holder. The fixing plate connected to the moving shaft is fixedly connected to the first hob holder. Then, the driven gear is meshed with the first hob holder, and the first hob holder can rotate self, forming a speed reduction structure. S3. As described in step S2, driven by the first hob holder to rotate, the blades rotate uniformly with the moving shafts as the center points. The blades are annularly distributed in 6 pieces, and the rotation directions and speeds are the same. The blade body edges are spirally arranged to reduce wind resistance and increase the cutting area. S4. As described in step S3, when the rotation speed of the blades is too high, the generated noise is absorbed and compensated by the internal sound absorption cavity under the influence of the air flow, and weakens in turn in a cycle and is in a constant state to achieve the effect of reducing noise.

2. The rolling grass blade for low-noise cutting of lawn vegetation according to claim 1, characterized in that: A throttle pipe (9) is arranged in the middle of the roller cutter (5) internally, and the throttle pipe (9) is in close connection with the moving shaft (3).

3. A rolling grass blade for low-noise cutting of lawn vegetation according to claim 2, characterized in that: Sound absorption sheets (10) are annularly distributed inside the roller cutter (5). An irregular groove (11) is connected inside the sound absorption sheet (10), and the irregular groove (11) is connected between adjacent sound absorption sheets (10).

4. The rolling grass blade for low-noise cutting of lawn vegetation according to claim 3, characterized in that: An inner cavity (8) is arranged inside the roller cutter (5), and the inner cavity (8) is respectively connected to the sound absorption sheet (10), the irregular groove (11) and the throttle pipe (9).

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