Integrated cutter head and cutter shaft assembly with the same

Abstract

The utility model discloses an integral cutter head and the cutter shaft assembly of installing the cutter head relates to the lawn mower accessory technology field, including the substrate, the center of substrate is equipped with the mounting hole of the front and rear both ends of the through substrate, the edge of substrate extends outward and forms the transition plate, and the outer end of transition plate is connected with the lug plate for connecting blade, transition plate and lug plate are equipped with several, with the center of substrate as the center, and the even interval is surrounded in the outer periphery of substrate, the included angle is equipped with between transition plate and substrate, thereby making each lug plate and substrate between all present certain inclination angle, wherein the inclination direction of the projection of at least one lug plate on the axial central surface of substrate is opposite with the rest lug plate, the utility model discloses the cutter head of integral type, and the special structure design, when mowing, the cutter head can blow the grass that is cut and swings along the axial direction in the process of rotating, and the blade is convenient to cut, improves the crushing effect, and simultaneously, the cutter shaft assembly of installing the cutter head is lighter, and the welding and installation are more convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of lawnmower accessories, specifically to an integrated cutter disc and a cutter shaft assembly on which the cutter disc is installed. Background Technology

[0002] The structure of the blade and cutter shaft of existing lawnmowers is as follows: Figure 1 As shown, the cutter head has a double-ear plate structure, with two blades connected to each set of ear plates. Each set of ear plates is independently welded to the cutter shaft, and the ear plates are staggered. A motor drives the cutter shaft, ear plates, and blades on the ear plates to rotate at high speed, cutting weeds to achieve the purpose of lawn trimming. However, this cutter head structure is relatively bulky, and each ear plate needs to be welded individually. During welding, the staggered distance between the ear plates must be manually controlled, resulting in poor welding precision and slow welding speed. In use, because the cutter head is perpendicular to the cutter shaft, there are problems such as high resistance during lawn mowing, high energy consumption, and easy blade breakage. Furthermore, it cannot achieve cutting at different angles in the axial direction of the cutter shaft, which easily leads to missed cuts. Utility Model Content

[0003] The purpose of this utility model is to provide an integrated blade disc and a blade shaft assembly with the blade disc installed. The integrated blade disc and special structural design allow the blade disc to blow the grass along the axial direction during the cutting process, making it easier for the blades to cut it and improving the pulverizing effect. At the same time, the blade shaft assembly with the blade disc is lighter and easier to weld and install.

[0004] This utility model includes a substrate, with a mounting hole at the center of the substrate penetrating both the front and rear ends of the substrate; a transition plate extends outward from the edge of the substrate, and an ear plate for connecting a blade is connected to the outer end of the transition plate; a plurality of transition plates and ear plates are provided, which are evenly spaced around the outer periphery of the substrate with the center of the substrate as the center; an angle is provided between the transition plate and the substrate, so that each ear plate presents a certain tilt angle with the substrate, wherein the tilt direction of the projection of at least one ear plate on the axial center plane of the substrate is opposite to that of the other ear plates.

[0005] With the above structure, the special design of the base plate, transition plate and ear plate ultimately forms a fan-shaped blade disc, which can blow the grass being cut along the axis during rotation, making it easier for the blades to cut it and improving the crushing effect. Ultimately, the blade shaft assembly with this blade disc can achieve the same crushing effect as the old blade disc at high speed when using a lower crushing speed, thereby reducing the output power of the crusher and saving energy consumption of the micro-tiller.

[0006] Preferably, the ear plate is provided with through holes for connecting the blade through both ends of the ear plate, and the radial distance from the center of the through hole to the center of the mounting hole on each ear plate is equal.

[0007] Preferably, the angle between each transition plate and the substrate is different, so that the projection positions of each ear plate on the axial center plane of the substrate are staggered.

[0008] Preferably, the angle between the transition plate and the substrate is 15° to 25°.

[0009] Preferably, at least three ear plates are evenly distributed on the outer circumference of the substrate.

[0010] Preferably, the projections of the substrate, transition plate, and ear plate onto the axial center plane of the substrate are smooth, wavy shapes.

[0011] Preferably, the substrate, transition plate, and ear plate are integrally molded.

[0012] A cutter shaft assembly is provided with an integrated cutter head as described above. The cutter shaft assembly includes a central shaft, on which a plurality of cutter heads are fixedly connected at axial intervals. The lugs of the plurality of cutter heads are staggered from each other in the circumferential direction of the central shaft.

[0013] With the above structure, the integrated cutter head structure makes the cutter shaft assembly with the cutter head lighter and easier to install. When welding the cutter head, it is easier to stagger the various ear plates and the stagger distance is more precise. There is no need to control it manually based on experience values, resulting in higher welding precision. At the same time, it also improves welding efficiency and production efficiency. It is suitable for use in various power micro-tiller models, and subsequent maintenance is also more convenient.

[0014] In summary, this utility model has the following beneficial effects:

[0015] 1. The integrated cutter head structure makes the cutter shaft assembly with the cutter head lighter and easier to install. When welding the cutter head, it is easier to stagger the various ear plates and the stagger distance is more precise. There is no need to control it by human experience. The welding precision is higher, and the welding efficiency is improved. This also improves the production efficiency. It is suitable for use in various power micro-tiller models and subsequent maintenance is also more convenient.

[0016] 2. The special structure design of the base plate, transition plate and ear plate ultimately forms a fan-shaped blade disc, which can blow the grass being cut along the axis during the rotation of the blade disc, making it easier for the blades to cut it and improving the crushing effect; ultimately, the blade shaft assembly with this blade disc can achieve the same crushing effect as the old blade disc at high speed when using a lower crushing speed, thereby reducing the output power of the crusher and saving energy consumption of the mini tiller.

[0017] 3. The angle between each transition plate and the substrate is different, so that the projection positions of each ear plate on the axial center plane of the substrate are staggered, resulting in a larger cutting surface, higher cutting efficiency, and less chance of missing cuts. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the currently used cutter head and cutter shaft assembly described in the background art;

[0019] Figure 2 This is a front view of the integrated cutter head of this utility model;

[0020] Figure 3 This is a perspective view of the integrated cutter head of this utility model;

[0021] Figure 4 for Figure 2 A partial sectional view along line AA in the middle;

[0022] Figure 5 This is a schematic diagram of the cutter shaft assembly.

[0023] In the diagram: 1. Substrate; 2. Mounting hole; 3. Transition plate; 4. Ear plate; 5. Through hole; 6. Central shaft; 100. Blade. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] The orientations mentioned in this specification are based on the orientation of the integrated cutter head of this utility model and the cutter shaft assembly on which the cutter head is installed during normal operation. They do not limit the orientation during storage and transportation, and only represent relative positional relationships, not absolute positional relationships.

[0026] like Figures 2 to 4 As shown, the integrated cutter head includes a base plate 1. The center of the base plate 1 has mounting holes 2 that penetrate both the front and rear ends of the base plate 1. The mounting holes 2 are used to mount the cutter head on the cutter shaft. A transition plate 3 extends outward from the edge of the base plate 1. The outer end of the transition plate 3 is connected to an ear plate 4 for connecting the blade 100. There are several transition plates 3 and ear plates 4, which are evenly spaced around the outer periphery of the base plate 1 with the center of the base plate 1 as the center. There is an angle between the transition plate 3 and the base plate 1, so that each ear plate 4 presents a certain tilt angle with the base plate 1. The tilt direction of the projection of at least one ear plate 4 on the axial center plane of the base plate 1 is opposite to that of the other ear plates 4.

[0027] The special structure design of the base plate 1, transition plate 3 and ear plate 4 ultimately forms a fan-shaped blade disc, which allows the blade disc to blow the grass being cut along the axial direction during rotation, making it easier for the blade 100 to cut it and improve the crushing effect. Ultimately, the blade shaft assembly with this blade disc can achieve the same crushing effect as the old blade disc at high speed when using a lower crushing speed, thereby reducing the output power of the crusher and saving energy consumption of the micro tiller.

[0028] Furthermore, the ear plate 4 is provided with through holes 5 that pass through both the front and rear ends of the ear plate 4 for connecting the blade 100. A connector is inserted into the through hole 5, and the connector connects the blade 100 and the ear plate 4 together. The radial distance from the center of the through hole 5 on each ear plate 4 to the center of the mounting hole 2 is equal, so that when the cutter head rotates, the rotation speed and tangential force of the blade 100 at each position are the same, making the cutter head rotate more smoothly.

[0029] Furthermore, the angle between each transition plate 3 and the substrate 1 is different, so that the projection positions of each ear plate 4 on the axial center plane of the substrate 1 are staggered, resulting in a larger cutting surface, higher cutting efficiency, and less chance of missing cuts. Preferably, in this embodiment, the angle between the transition plate 3 and the substrate 1 is 15° to 25°, which takes into account both the blowing effect of the blade on the grass to be cut and the cutting resistance, resulting in higher cutting efficiency.

[0030] Furthermore, in this embodiment, at least three ear plates 4 are evenly distributed on the outer circumference of the substrate 1, so that the arrangement of the ear plates 4 is more uniform and reasonable, the density is appropriate, and the cutting efficiency is high; in other embodiments, the number of ear plates 4 can also be other values.

[0031] Furthermore, the projection of the base plate 1, transition plate 3, and ear plate 4 onto the axial center plane of the base plate 1 is a smooth wave shape. The base plate 1, transition plate 3, and ear plate 4 are integrally molded, making the overall structure of the blade disc closer to the shape of a fan blade, with a smoother transition, less air resistance, and a more reasonable structure. When cutting grass, the airflow generated by the rotation of the blade disc is greater, resulting in a better blowing effect on the grass being cut.

[0032] A cutter shaft assembly equipped with any of the above-described integrated cutter heads, such as Figure 5As shown, the cutter shaft assembly includes a central shaft 6, on which several cutter discs are fixedly connected at axial intervals. The ear plates 4 of the cutter discs are staggered relative to each other in the circumferential direction of the central shaft 6. During installation, the blades 100 are first installed on each ear plate 4 of the cutter disc. The two blades 100 on the same ear plate 4 face opposite directions and are both inclined to the outside of the ear plate 4. The mounting holes 2 of the cutter disc with the blades 100 installed are then fitted onto the surface of the central shaft 6. The cutter disc is rotated to adjust its position so that the ear plates 4 on adjacent cutter discs are staggered relative to each other. The cutter disc is then welded and fixed to the central shaft 6. The integrated cutter disc structure makes installation more convenient, welding efficiency higher, and production efficiency improved.

[0033] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. An integrated cutter head, characterized in that: The system includes a substrate (1), the center of which is provided with mounting holes (2) penetrating the front and rear ends of the substrate (1); the edge of the substrate (1) extends outward to form a transition plate (3), the outer end of the transition plate (3) is connected to an ear plate (4) for connecting a blade (100); there are several transition plates (3) and ear plates (4), which are evenly spaced around the outer periphery of the substrate (1) with the center of the substrate (1) as the center; there is an angle between the transition plate (3) and the substrate (1), so that each ear plate (4) presents a certain tilt angle with the substrate (1), wherein the tilt direction of the projection of at least one ear plate (4) on the axial center plane of the substrate (1) is opposite to that of the other ear plates (4).

2. The integrated cutter head as described in claim 1, characterized in that: The ear plate (4) is provided with through holes (5) that pass through the front and rear ends of the ear plate (4) for connecting the blade (100). The radial distance from the center of the through hole (5) on each ear plate (4) to the center of the mounting hole (2) is equal.

3. The integrated cutter head as described in claim 1, characterized in that: The angle between each transition plate (3) and the substrate (1) is different, so that the projection positions of each ear plate (4) on the axial center plane of the substrate (1) are staggered.

4. The integrated cutter head as described in claim 3, characterized in that: The angle between the transition plate (3) and the substrate (1) is 15° to 25°.

5. The integrated cutter head as described in claim 1, characterized in that: The substrate (1) has at least three ear plates (4) evenly distributed on its outer circumference.

6. The integrated cutter head as described in claim 1, characterized in that: The projection of the substrate (1), transition plate (3) and ear plate (4) onto the axial center plane of the substrate (1) is a smooth, wavy shape.

7. The integrated cutter head as described in claim 1, characterized in that: The substrate (1), transition plate (3) and ear plate (4) are integrally molded.

8. A cutter shaft assembly equipped with an integrated cutter head as described in any one of claims 1-7, characterized in that: The cutter shaft assembly includes a central shaft (6), on which a plurality of cutter discs are fixedly connected at axial intervals, and the ear plates (4) of the plurality of cutter discs are staggered from each other in the circumferential direction of the central shaft (6).

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