A cutting blade, a cutting mechanism and a mowing robot

Abstract

The application is suitable for the technical field of cutting equipment, and provides a cutting blade, a cutting mechanism and a grass cutting robot. The cutting blade comprises a base, a cutting part and a raised part. The base has a mounting surface and can rotate around a first axis; the cutting part is formed by extending from the base in a direction away from the first axis, the cutting part has opposite first and second side edges, and the first side edge is provided with a cutting edge; and the raised part is formed by upwardly bending and extending from an end of the cutting part away from the first axis. The cutting part comprises an inclined section, the inclined section is arranged to be inclined relative to the mounting surface, and the height of the inclined section gradually increases in a direction from the first side edge to the second side edge. In this way, in combination with the upward bending of the raised part, an upward airflow is formed during the rotation of the cutting blade, so that the grass clippings cut by the cutting blade are lifted to a higher height, the probability that the grass clippings are cut again by the rotating cutting blade when falling is increased, and the degree of fineness of the cut grass clippings is improved.

Description

Technical Field

[0001] This application relates to the field of cutting equipment technology, and more specifically, to a cutting blade, a cutting mechanism, and a lawn mowing robot. Background Technology

[0002] Lawn mowers are essential equipment for lawn maintenance. Besides mowing, they also collect grass clippings. Because finer grass clippings fill the collection bags more tightly, they extend the collection time per cycle, reducing the frequency of cleaning or replacing the bags. Furthermore, finer grass clippings are easier to decompose and process as fertilizer. Therefore, how to make lawn mowers produce finer grass clippings is a pressing issue that needs to be addressed. Utility Model Content

[0003] The purpose of this application is to provide a cutting blade, a cutting mechanism, and a lawn mowing robot, aiming to solve the technical problem in the prior art of how to make lawn mowers cut finer grass clippings.

[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a cutting blade, comprising:

[0005] The base has a mounting surface and is rotatable about a first axis;

[0006] A cutting portion is formed by extending from the base in a direction away from the first axis, and the cutting portion has opposing first and second sides, the first side being provided with a blade.

[0007] The raised portion is formed by bending upward from the end of the cut portion away from the first axis;

[0008] The cutting section includes an inclined section, which is inclined relative to the mounting surface, and the height of the inclined section gradually increases along the direction from the first side to the second side.

[0009] In one possible design, the height of the inclined segment gradually increases and the width gradually decreases along the direction from the first side to the second side.

[0010] In one possible design, the cutting section further includes a straight section, which is arranged parallel to the mounting surface, the blade is disposed on the straight section, and the inclined section is connected to the side of the straight section opposite to the blade.

[0011] In one possible design, the upper surface of the inclined segment is either a plane or a curved surface.

[0012] In one possible design, the angle formed between the tangent at any point on the upper surface of the inclined segment and the mounting surface is the inclination angle, which ranges from 10° to 40°.

[0013] In one possible design, the cutting portion includes a first cutting portion and a second cutting portion, the first cutting portion being formed by bending and extending from the base, the second cutting portion being formed by bending and extending from the first cutting portion, and the second cutting portion including the inclined segment.

[0014] In one possible design, the ratio of the width of the second cutting portion on the first side to the width of the second cutting portion on the second side ranges from 1.5 to 2.5.

[0015] And / or, the ratio of the width of the first cutting portion on the first side to the width of the second cutting portion on the first side is in the range of 0.8 to 1.2.

[0016] In one possible design, the raised portion has a raised height relative to the mounting surface ranging from 1.2 mm to 3 mm.

[0017] This application also provides a cutting mechanism, including a cutter head and at least one cutting blade provided by any of the above technical solutions, the cutting blade being connected to the cutter head and extending from the circumferential edge of the cutter head.

[0018] In one possible design, the cutting blade is rotatably connected to the blade disc, which has a first limiting portion. When the blade disc rotates in a first direction to drive the cutting blade to cut grass, the first side of the cutting portion of the cutting blade abuts against the first limiting portion, thereby fixing the position of the cutting blade relative to the blade disc.

[0019] In one possible design, the cutter head is further provided with a second limiting portion, which is configured to abut against the side where the second side edge of the cutting portion of the cutting blade is located, so as to restrict the cutting blade from continuing to rotate in a direction opposite to the first direction.

[0020] In one possible design, the cutter head is provided with a clearance groove configured to allow at least a portion of the structure of the cutting blade to extend into it.

[0021] In one possible design, the depth of the clearance groove gradually increases along a direction opposite to the first direction.

[0022] In one possible design, the clearance groove is recessed on the lower surface of the cutter head and protrudes from the upper surface of the cutter head to form a protruding fan blade structure on the upper surface of the cutter head.

[0023] In one possible design, the distance between the upper surface of the fan blade structure and the upper surface of the cutter head gradually increases in the height direction along a direction opposite to the first direction.

[0024] In one possible design, the upper surface of the cutter head is provided with a plurality of fan blades, which are arranged radially along the direction from the center of the cutter head to the circumferential edge of the cutter head.

[0025] This application also provides a lawn mowing robot, including a drive mechanism and a cutting mechanism provided by any of the above technical solutions, wherein the cutting mechanism is connected to the output end of the drive mechanism.

[0026] The beneficial effects of the cutting blade provided in this application are as follows: Compared with the prior art, in the cutting blade of this application, when the base rotates around the first axis, that is, when the cutting blade rotates around the first axis, the grass clippings cut by the blade on the first side of the cutting part will move relative to the cutting part in the direction from the first side to the second side. Since the cutting part has an inclined section that gradually increases in height along the direction from the first side to the second side, the airflow is guided by the inclined section to flow upward, forming an upward airflow. The upward airflow lifts the grass clippings to a higher height, thereby increasing the probability that the grass clippings will be cut again by the rotating cutting blade when they fall, and improving the fineness of the grass clippings cut by the cutting blade. Furthermore, since the end of the cutting part away from the first axis bends upward to form a raised part, the upward flow of the upward airflow is improved under the guidance of the raised part, so that the upward airflow can lift the grass clippings to a higher height, which is conducive to further increasing the probability that the grass clippings will be cut again by the cutting blade when they fall, thereby further improving the fineness of the grass clippings cut by the cutting blade.

[0027] The beneficial effects of the cutting mechanism provided in this application are as follows: Compared with the prior art, the cutting mechanism provided in this application, by connecting at least one cutting blade provided by any of the above-mentioned technical solutions to the cutter head, thus possesses at least all the beneficial effects of the above-mentioned cutting blades, which will not be elaborated here.

[0028] The beneficial effects of the lawn mowing robot provided in this application are as follows: Compared with the prior art, the lawn mowing robot provided in this application, by connecting the cutting mechanism provided by any of the above-mentioned technical solutions to the output end of the drive mechanism, has at least all the beneficial effects of the above-mentioned cutting mechanism, which will not be repeated here. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a cutting blade provided in one embodiment of this application from one perspective;

[0031] Figure 2 This is a schematic diagram of the cutting blade provided in one embodiment of this application from another perspective;

[0032] Figure 3 This is a structural schematic diagram of a cutting blade provided in one embodiment of this application from another perspective;

[0033] Figure 4 This is a top view of a cutting blade provided in one embodiment of this application;

[0034] Figure 5 This is a schematic diagram of the cutting mechanism provided in one embodiment of this application from one perspective;

[0035] Figure 6 This is a bottom view of a cutting mechanism provided in one embodiment of this application;

[0036] Figure 7 This is a schematic diagram of the cutting mechanism provided in one embodiment of this application from another perspective.

[0037] The details of the reference numerals used in the above figures are as follows:

[0038] 100. Cutting blade;

[0039] 110. Base; 111. Mounting surface; 112. Mounting hole;

[0040] 120. Cutting section; 121. First side edge; 122. Second side edge; 123. First cutting section; 124. Second cutting section; 1241. Straight section; 1242. Inclined section; 125. Blade;

[0041] 130. Upturned part;

[0042] 200, cutter head; 210, first limiting part; 220, clearance groove; 221, second limiting part; 230, fan blade. Detailed Implementation

[0043] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0044] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0045] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0047] To illustrate the technical solutions described in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0048] like Figure 1 As shown, one embodiment of this application provides a cutting blade 100, including a base 110, a cutting portion 120, and a raised portion 130. The base 110 has a mounting surface 111 and is rotatable about a first axis L1; the cutting portion 120 extends from the base 110 in a direction away from the first axis L1, and has opposing first side 121 and second side 122, with the first side 121 having a cutting edge 125; the raised portion 130 extends upwardly from the end of the cutting portion 120 away from the first axis L1. It should be noted that the first side 121 and the second side 122 are located on opposite sides of the cutting portion 120 in the circumferential direction about the first axis L1. In this embodiment, the base 110, the cutting portion 120, and the raised portion 130 can be connected by integral molding.

[0049] The cutting portion 120 includes an inclined section 1242, which is inclined relative to the mounting surface 111. In some embodiments, the height of the inclined section 1242 gradually increases along the direction from the first side 121 to the second side 122. In other embodiments, the height of the inclined section 1242 gradually increases and the width gradually decreases along the direction from the first side 121 to the second side 122.

[0050] It should be noted that the height direction of the inclined segment 1242 refers to the direction parallel to the first axis L1, and the width direction of the inclined segment 1242 is the radial direction that is close to or away from the first axis L1. In this embodiment, the cutting blade 100 is mainly used to cut the object to be cut on the working plane, for example, cutting grass blades on a lawn. The first axis L1 is perpendicular to the working plane; therefore, the aforementioned height direction is also perpendicular to the working plane. Optionally, the aforementioned working plane can be a horizontal plane or an inclined plane. It should be noted that the height of the inclined segment 1242 gradually increases along the direction from the first side 121 to the second side 122. Specifically, along the direction from the first side 121 to the second side 122, the distance between the upper surface of the inclined segment 1242 and the working plane gradually increases in the height direction. It should also be noted that the raised portion 130 is formed by bending upward from the end of the cutting portion 120 away from the first axis L1. Specifically, the raised portion 130 is formed by bending and extending from the end of the cutting portion 120 away from the first axis L1 toward the side opposite to the working plane. In particular, the raised portion 130 is formed by bending and extending from the end of the inclined segment 1242 of the cutting portion 120 near the second side 122 away from the first axis L1 toward the side opposite to the working plane.

[0051] For ease of description, the following text will use the working plane as a horizontal plane and the height direction as the vertical direction as an example. Furthermore, for ease of description, the following text will use grass blades as an example, and the grass clippings cut by the cutting blade 100 as an example.

[0052] When the base 110 rotates around the first axis L1, it will drive the cutting part 120 and the raised part 130 to rotate synchronously around the first axis L1, that is, the cutting blade 100 rotates around the first axis L1. Since the first side 121 is provided with a blade 125, in practical applications, in order to cut grass blades smoothly, during the rotation of the cutting blade 100 around the first axis L1, the second side 122 needs to rotate towards the first side 121. At this time, the airflow flows relative to the cutting part 120 in the cutting blade 100 along the direction from the first side 121 to the second side 122, so that the airflow can flow upward under the guidance of the inclined section 1242 in the cutting part 120, thereby forming an upward airflow. Under the guidance of the upward airflow, the cut grass clippings can be lifted to a higher height. In this way, the probability of the grass clippings being cut again by the rotating cutting blade 100 when they fall can be increased, thereby improving the fineness of the grass clippings cut by the cutting blade 100.

[0053] It is understandable that when the airflow flows relative to the cutting section 120 along the direction from the first side 121 to the second side 122, the airflow can be lifted upward under the guidance of the inclined section 1242 in the cutting section 120, causing the airflow below the inclined section 1242 to flow upward. Therefore, further designing the width of the inclined section 1242 to gradually decrease along the direction from the first side 121 to the second side 122 is beneficial to reduce the resistance caused by the inclined section 1242 to the upward flow of the airflow below, thereby further improving the upward guiding force of the rising airflow, so that the grass clippings can be lifted to a higher height by the rising airflow, thereby further improving the fineness of the grass clippings cut by the cutting blade 100.

[0054] Furthermore, since the end of the cutting section 120 that is far from the first axis L1 is bent upward to form a raised section 130, the guiding and gathering effect of the raised section 130 can further enhance the upward guiding force of the rising airflow, further increase the height at which the grass clippings are lifted by the rising airflow, and thus further enhance the fineness of the grass clippings cut by the cutting blade 100.

[0055] In some embodiments, a mounting hole 112 is provided through the base 110, allowing the base 110 to be mounted on the output end of an external drive mechanism or on the cutter head of an external device. When the base 110 is mounted on the output end of the external drive mechanism, the output end of the external drive mechanism can directly drive the base 110 to rotate around the axis of the mounting hole 112. In this case, the axis of the mounting hole 112 is the first axis L1. When the base 110 is mounted on the cutter head, the external drive mechanism can drive the cutter head to rotate, thereby indirectly driving the base 110 to rotate. In this case, if the base 110 is fixedly connected to the cutter head, the first axis L1 is the rotation axis of the cutter head; if the base 110 is rotatably connected to the cutter head through the mounting hole 112, the first axis L1 is the axis of the mounting hole 112.

[0056] In this embodiment, the mounting surface 111 is perpendicular to the first axis L1. In one possible design, such as... Figure 2 As shown, the cutting section 120 also includes a straight section 1241. The straight section 1241 is arranged parallel to the mounting surface 111, that is, the straight section 1241 is arranged perpendicular to the first axis L1. The blade 125 is provided on the straight section 1241, and the inclined section 1242 is connected to the side of the straight section 1241 away from the blade 125. In this embodiment, when the cutting blade 100 rotates around the first axis L1, the blade 125 on the straight section 1241 can vertically cut the grass blades on the working plane, making the cutting smoother and the cross-section of the grass clippings flatter.

[0057] In one possible design, the upper surface of the inclined segment 1242 is either a plane or a curved surface. It should be noted that, as... Figure 3 As shown, the angle formed between the tangent plane at any point on the upper surface of the inclined segment 1242 and the mounting surface 111 is the inclination angle α of the inclined segment 1242 at that point. When the upper surface of the inclined segment 1242 is a plane, as shown... Figure 3 As shown, the tilt angle α of the inclined segment 1242 remains constant. When the upper surface of the inclined segment 1242 is curved, the tilt angle α of the inclined segment 1242 is different at different points on the upper surface. For example, along the direction from the first side 121 to the second side 122, the tilt angle α of the inclined segment 1242 can gradually increase, gradually decrease, or have any other arbitrary changing trend.

[0058] The tilt angle α of the inclined section 1242 should not be too large or too small. If the tilt angle α of the inclined section 1242 is too large, it will easily increase the resistance encountered by the grass clippings when moving along the inclined section 1242; if the tilt angle α of the inclined section 1242 is too small, the lifting effect on the upward guiding force of the rising airflow will be weak. Optionally, the tilt angle α of the inclined section 1242 is in the range of 10° to 40°. For example, the tilt angle α of the inclined section 1242 can be 10°, 15°, 25°, or 40°, etc. This setting can maximize the surface lift of the blades while preventing the grass clippings from encountering large resistance when moving along the inclined section 1242, which is beneficial to improving the grass collection effect. Preferably, the tilt angle α of the inclined section 1242 is in the range of 15° to 25°.

[0059] In one possible design, such as Figure 1As shown, the cutting section 120 includes a first cutting section 123 and a second cutting section 124. The first cutting section 123 extends from the base 110 by bending, and the second cutting section 124 extends from the first cutting section 123 by bending. The second cutting section 124 includes an inclined section 1242. In this configuration, the second cutting section 124 is located on the side of the first cutting section 123 away from the first axis L1, allowing the second cutting section 124 to be closer to the cutting surface of the grass blades. The second cutting section 124 is connected to the base 110 through the first cutting section 123. The inclined section 1242 in the second cutting section 124 enhances the upward guiding force of the rising airflow, thereby improving the grass collection effect. It should be noted that both the first cutting part 123 and the second cutting part 124 have a first side 121 and a second side 122. The first side 121 of the first cutting part 123 and the first side 121 of the second cutting part 124 are located on the same side, and the second side 122 of the first cutting part 123 and the second side 122 of the second cutting part 124 are located on the same side. Both the first side 121 of the first cutting part 123 and the first side 121 of the second cutting part 124 are provided with a blade 125.

[0060] In one specific embodiment, such as Figure 2 As shown, the second cutting section 124 also includes the aforementioned straight section 1241. One side of the straight section 1241 serves as the first side 121 of the second cutting section 124 and is provided with a blade 125. An inclined section 1242 is connected to the side of the straight section 1241 away from the blade 125. The sides of both the straight section 1241 and the inclined section 1242 near the first axis L1 are connected to the first cutting section 123.

[0061] In some embodiments, such as Figures 1 to 3 As shown in any of the accompanying drawings, the first cutting portion 123 gradually bends downward from the base 110 toward the side away from the first axis L1, and the second cutting portion 124 bends and extends radially from the first cutting portion 123 toward the direction away from the first axis L1. This arrangement, by bending the first cutting portion 123 downward from the base 110, reduces the height of the second cutting portion 124, thereby reducing the cutting height of the blade 125. This allows the cutting blade 100 to cut lower blades of grass, improving the mowing effect.

[0062] In some embodiments, the height of the upper surface of the first cutting portion 123 gradually increases along the direction from the first side 121 to the second side 122; that is, the distance between the upper surface of the first cutting portion 123 and the working plane in the height direction gradually increases along the direction from the first side 121 to the second side 122. This arrangement is beneficial for further improving the upward guiding force of the rising airflow.

[0063] In some embodiments, such as Figure 4As shown, along the direction from the first side 121 to the second side 122, the width of the second cutting portion 124 gradually decreases in the radial direction of the first axis L1. Since the raised portion 130 is formed by bending upwards from the end of the inclined segment 1242 near the second side 122 away from the first axis L1, this embodiment allows a guiding channel to be formed between the first cutting portion 123, the second cutting portion 124, and the raised portion 130. This allows grass clippings to be relatively concentrated and flow in the corresponding area above the second cutting portion 124 under the influence of airflow, thereby facilitating the collection of grass clippings into the grass collection bag and improving the grass collection effect. Specifically, along the direction from the first side 121 to the second side 122, only the width of the inclined segment 1242 in the second cutting portion 124 can gradually decrease, or both the width of the straight segment 1241 and the inclined segment 1242 in the second cutting portion 124 can gradually decrease.

[0064] The width of the second cutting portion 124 on the second side 122 should not be too small or too large. In one possible design, such as Figure 4 As shown, the ratio of the width D1 of the second cutting portion 124 on the first side 121 to the width D2 of the second cutting portion 124 on the second side 122 ranges from 1.5 to 2.5. For example, the ratio of the width D1 of the second cutting portion 124 on the first side 121 to the width D2 of the second cutting portion 124 on the second side 122 can specifically be 1.5, 1.8, 2.2, or 2.5, etc. This arrangement is beneficial to improving the grass collection effect. Preferably, the ratio of the width D1 of the second cutting portion 124 on the first side 121 to the width D2 of the second cutting portion 124 on the second side 122 ranges from 1.8 to 2.2.

[0065] In some embodiments, such as Figure 4 As shown, along the direction from the first side 121 to the second side 122, the width D3 of the first cutting portion 123 in the radial direction of the first axis L1 gradually decreases, thereby further enhancing the upward guiding force of the rising airflow. In other embodiments, the width D3 of the first cutting portion 123 in the radial direction of the first axis L1 along the direction from the first side 121 to the second side 122 may also remain fixed or gradually increase.

[0066] In one possible design, the ratio of the width D3 of the first cutting part 123 on the first side 121 to the width D1 of the second cutting part 124 on the first side 121 ranges from 0.8 to 1.2. For example, the ratio of the width D3 of the first cutting part 123 on the first side 121 to the width D1 of the second cutting part 124 on the first side 121 can specifically be 0.8, 0.9, 1.1, or 1.2, etc. This arrangement not only improves the grass collection effect but also enhances the cutting effect of the cutting blade 100.

[0067] In some embodiments, to enhance the upward guiding force of the raised portion 130 on the rising airflow, the highest point of the raised portion 130 is higher than the mounting surface 111. The height of the highest point of the raised portion 130 should not be too high or too low. If the height of the highest point of the raised portion 130 is too high, it easily increases the resistance encountered by the cutting blade 100 during rotation; if the height of the highest point of the raised portion 130 is too low, the effect of enhancing the upward guiding force on the rising airflow is weak. In one possible design, such as... Figure 3 As shown, the upward tilting height D4 of the raised portion 130 relative to the mounting surface 111 ranges from 1.2mm to 3mm. It should be noted that the upward tilting height of the raised portion 130 relative to the mounting surface 111 specifically refers to the distance in the height direction between the highest point of the raised portion 130 and the mounting surface 111. Optionally, the upward tilting height of the raised portion 130 relative to the mounting surface 111 can be 1.2mm, 1.8mm, 2.4mm, or 3mm, etc. This setting effectively improves the upward guiding force of the rising airflow and avoids excessive resistance to the cutting blade 100 during rotation, thus helping to reduce energy consumption.

[0068] Another embodiment of this application provides a cutting mechanism, such as... Figure 5 As shown, the cutting mechanism includes a cutter head 200 and at least one cutting blade 100 provided in any of the above embodiments. The cutting blade 100 is connected to the cutter head 200 and extends from the circumferential edge of the cutter head 200. Specifically, the base 110 of the cutting blade 100 is connected to the cutter head 200, and the cutting portion 120 and the raised portion 130 of the cutting blade 100 extend from the circumferential edge of the cutter head 200.

[0069] The cutting mechanism provided in this application embodiment has at least all the beneficial effects of the cutting blade 100 described above by connecting at least one cutting blade 100 provided in any of the above embodiments to the cutter head 200, and will not be repeated here.

[0070] Optionally, there may be multiple cutting blades 100, which are spaced apart around the second axis L2, and the base 110 of each cutting blade 100 is connected to the cutter head 200. This is beneficial to improving the grass collection and cutting effect of the cutting mechanism.

[0071] In some embodiments, the cutting blade 100 may be fixedly mounted on the cutter head 200.

[0072] In other embodiments, the cutting blade 100 is rotatably connected to the cutter head 200. Specifically, the base 110 of the cutting blade 100 is rotatably connected to the cutter head 200. In this embodiment, the base 110 is rotatably mounted to the cutter head 200 through a mounting hole 112, the axis of which is the first axis L1. In this embodiment, the rotation axis of the cutter head 200 is referred to as the second axis L2, which is parallel to the first axis L1. Figure 5 As shown, the cutter head 200 is provided with a first limiting part 210. When the cutter head 200 rotates in the first direction to drive the cutting blade 100 to cut grass, the side of the first side 121 of the cutting part 120 of the cutting blade 100 abuts against the first limiting part 210, thereby fixing the position of the cutting blade 100 relative to the cutter head 200. It should be noted that the cutting blade 100 has a first side and a second side arranged opposite to each other in the circumferential direction around the first axis L1. The first side 121 of the cutting part 120 is located on the first side of the cutting blade 100, and the first side of the cutting blade 100 abuts against the first limiting part 210 under the drive of the cutter head 200. The second side 122 of the cutting part 120 is located on the second side of the cutting blade 100.

[0073] In the above embodiments, the first direction can specifically be a clockwise rotation direction around the second axis L2, or a counterclockwise rotation direction around the second axis L2. For ease of description, as follows... Figure 6 As shown, the following text refers to the first direction as the direction of clockwise rotation around the second axis L2. It can be understood that, since the cutting blade 100 is rotatably connected to the cutter head 200, therefore, as... Figure 5 and Figure 6 As shown, when the cutter head 200 rotates clockwise around the second axis L2, the cutting blade 100 is swung under the action of centrifugal force, causing the cutting blade 100 to rotate clockwise (R1) relative to the cutter head 200 around the first axis L1 until the first side of the cutting blade 100 abuts against the first limiting part 210, thereby fixing the position of the cutting blade 100 relative to the cutter head 200 to ensure that the cutting blade 100 can smoothly cut grass. With this configuration, when the cutting blade 100 rotates clockwise around the second axis L2 under the drive of the cutter head 200 and cuts grass, the grass comes into contact with the cutting edge 125 of the cutting part 120 of the cutting blade 100 in a counterclockwise direction (R2) around the first axis L1, so that the cutting blade 100 is subjected to resistance in the counterclockwise direction (R2) around the first axis L1, thereby giving the cutting blade 100 the potential energy to deflect counterclockwise (R2) relative to the cutter head 200 around the first axis L1. When the cutting blade 100 experiences excessive resistance, it can rotate counterclockwise (R2) relative to the cutter head 200 around the first axis L1, thereby reducing the reaction force of the grass blade on the cutting blade 100, thus reducing the load, and also effectively reducing the possibility of the cutting mechanism jamming.

[0074] Optionally, the first limiting portion 210 can be a protruding structure that protrudes from the side of the cutter head 200 facing the cutting blade 100. For example, the cutting blade 100 is mounted on the lower surface of the cutter head 200, and the first limiting portion 210 protrudes from the lower surface of the cutter head 200.

[0075] In one possible design, the cutter head 200 is further provided with a second limiting part 221, which is configured to abut against the side where the second side 122 of the cutting part 120 of the cutting blade 100 is located. That is, the second limiting part 221 is configured to abut against the second side of the cutting blade 100. The second limiting part 221 restricts the cutting blade 100 from continuing to rotate in the opposite direction to the first direction. In other words, the second limiting part 221 can limit the maximum angle of rotation of the cutting blade 100 from the first limiting part 210 in the opposite direction to the first direction. It should be noted that when the first direction is the direction of clockwise rotation around the second axis L2, the direction opposite to the first direction is the direction of counterclockwise rotation. Furthermore, as can be seen from the above, the base 110 of the cutting blade 100 is rotatably connected to the cutter head 200 around the first axis L1. Therefore, when the cutting blade 100 rotates in the opposite direction to the first direction, specifically, the cutting blade 100 rotates counterclockwise (R2) around the first axis L1. The same applies to the opposite, which will not be elaborated upon here.

[0076] According to the above configuration, under the limiting action of the second limiting part 221, the rotation angle of the cutting blade 100 relative to the cutter head 200 in the counterclockwise direction (R2) around the first axis L1 can be prevented from being too large. This ensures that when the resistance on the cutting blade 100 decreases, the cutter head 200 can be swung again in the clockwise direction around the second axis L2 when it rotates clockwise, so that the cutting blade 100 rotates again in the clockwise direction (R1) around the first axis L1 relative to the cutter head 200 until the first side of the cutting blade 100 abuts against the first limiting part 210, so that the cutting blade 100 can cut grass leaves again.

[0077] In one possible design, the cutter head 200 is provided with a clearance groove 220, which is configured to allow at least a portion of the structure of the cutting blade 100 to extend into it. By providing the clearance groove 220, the cutting blade 100 is limited, preventing interference between the cutting blade 100 and the cutter head 200 when the cutting blade 100 rotates relative to the cutter head 200.

[0078] In some embodiments, the clearance groove 220 is disposed on one side of the cutting blade 100 in a direction opposite to the first direction (R2). In one example, the first direction is clockwise about the second axis L2, and the clearance groove 220 is disposed on one side of the cutting blade 100 in a counterclockwise direction (R2) about the first axis L1. With this configuration, when the cutting blade 100 experiences excessive resistance and rotates counterclockwise (R2) relative to the cutter head 200 about the first axis L1, interference between the cutting blade 100 and the cutter head 200 can be avoided.

[0079] Optionally, the second limiting part 221 can be a protruding structure that protrudes from the side of the cutter head 200 facing the cutting blade 100. Alternatively, the second limiting part 221 can also be the inner wall of the clearance groove 220. When the cutting blade 100 extends into the clearance groove 220, it can abut against the second side of the cutting blade 100 through the inner wall of the clearance groove 220 to limit the cutting blade 100 from continuing to rotate in the direction opposite to the first direction (R2).

[0080] In one possible design, the depth of the clearance groove 220 gradually increases along the direction opposite to the first direction (R2). It is understood that the area of ​​the clearance groove 220 along the direction opposite to the first direction (R2) is the area away from the first axis L1. When the base 110 of the cutting blade 100 rotates relative to the cutter head 200 about the first axis L1, the cutting portion 120 and the raised portion 130 also rotate about the first axis L1, and the raised portion 130 is specifically formed by bending the end of the cutting portion 120 away from the first axis L1 upwards. Therefore, with the above arrangement, the clearance groove 220 can smoothly avoid the raised portion 130.

[0081] In one possible design, the clearance groove 220 is recessed on the lower surface of the cutter head 200 and protrudes from the upper surface of the cutter head 200, forming a protruding fan-blade structure on the upper surface of the cutter head 200. With this configuration, when the cutter head 200 rotates in the first direction, the airflow above the cutter head 200 can form an upward airflow driven by the fan-blade structure, thereby further optimizing aerodynamic performance and improving the grass-chopping effect.

[0082] In some embodiments, the clearance groove 220 protrudes from the upper surface of the cutter head 200 to form a fan-shaped structure. Along a direction opposite to the first direction, the distance in the height direction between the upper surface of the fan-shaped structure and the upper surface of the cutter head 200 gradually increases. When the cutter head 200 rotates along the first direction, the air above the cutter head 200 moves relative to the cutter head 200 in a direction opposite to the first direction. This causes the air above the cutter head 200 to gradually rise under the guidance of the upper surface of the fan-shaped structure, thereby forming an updraft above the cutter head 200 to further optimize aerodynamic performance and improve the grass-chopping effect.

[0083] In one possible design, such as Figure 7 As shown, the upper surface of the cutter head 200 is provided with several fan blades 230, which are arranged radially from the center of the cutter head 200 to its circumferential edge. By providing several fan blades 230 on the upper surface of the cutter head 200, when the cutter head 200 rotates around the second axis L2, an upward airflow can be formed in the area above the cutter head 200 under the action of the fan blades 230, increasing the airflow speed in the area above the cutter head 200. In this way, the airflow above the cutter head 200 can agitate the grass clippings, thereby preventing grass clippings from accumulating and reducing the formation of grass clumps, and further lifting the grass clippings. Then, under the action of centrifugal force, the grass clippings are thrown to the outer periphery of the cutter head 200, and the grass clippings fall under the action of gravity, increasing the probability that the grass clippings will be cut again by the cutting blades 100. This is beneficial to further improve the cutting, shredding and grass collection effects of the cutting mechanism.

[0084] In addition, since the fan blades 230 are arranged radially from the center of the cutter head 200 to the circumferential edge of the cutter head 200, this arrangement allows the air in the area above the cutter head 200 to flow from the center of the cutter head 200 to the circumference of the cutter head 200. This results in a more uniform distribution of airflow in the area above the cutter head 200, reducing the formation of turbulence and eddies, which is beneficial to further improving the grass cutting, grass chopping and grass collection effects of the cutting mechanism.

[0085] In this embodiment, the cutter head 200 can be roughly in the shape of a disc, and the second axis L2 passes through the center of the cutter head 200, so that the rotation process of the cutter head 200 around the second axis L2 is more stable.

[0086] In some embodiments, when multiple cutting blades 100 are rotatably mounted on the cutter head 200, each cutting blade 100 is provided with a corresponding clearance groove 220, and each clearance groove 220 is located on one side of the corresponding cutting blade 100 along a direction (R2) opposite to the first direction. In this embodiment, the fan blade structure formed by the protrusion of each clearance groove 220 on the upper surface of the cutter head 200 is the fan blade 230 on the upper surface of the cutter head 200.

[0087] Another embodiment of this application provides a lawnmower robot, including a drive mechanism and a cutting mechanism provided in any of the above embodiments, wherein the cutting mechanism is connected to the output end of the drive mechanism. Optionally, the drive mechanism may include a rotary motor or other structure suitable for driving the cutting mechanism to rotate.

[0088] The lawnmower robot provided in this application embodiment has at least all the beneficial effects of the above-described cutting mechanism by connecting the output end of the drive mechanism to the cutting mechanism provided in any of the above embodiments, and will not be described in detail here.

[0089] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cutting blade, characterized in that, include: The base has a mounting surface and is rotatable about a first axis; A cutting portion is formed by extending from the base in a direction away from the first axis, and the cutting portion has opposing first and second sides, the first side being provided with a blade. The raised portion is formed by bending upward from the end of the cut portion away from the first axis; The cutting section includes an inclined section, which is inclined relative to the mounting surface, and the height of the inclined section gradually increases along the direction from the first side to the second side.

2. The cutting blade as described in claim 1, characterized in that, Along the direction from the first side to the second side, the height of the inclined segment gradually increases and the width gradually decreases.

3. The cutting blade as described in claim 1, characterized in that, The cutting section further includes a straight section, which is arranged parallel to the mounting surface. The cutting edge is located on the straight section, and the inclined section is connected to the side of the straight section opposite to the cutting edge.

4. The cutting blade as described in any one of claims 1 to 3, characterized in that, The upper surface of the inclined segment is either a plane or a curved surface.

5. The cutting blade as described in any one of claims 1 to 3, characterized in that, The angle formed between the tangent at any point on the upper surface of the inclined section and the mounting surface is the inclination angle, which ranges from 10° to 40°.

6. The cutting blade as described in any one of claims 1 to 3, characterized in that, The cutting portion includes a first cutting portion and a second cutting portion. The first cutting portion is formed by bending and extending from the base, and the second cutting portion is formed by bending and extending from the first cutting portion. The second cutting portion includes the inclined segment.

7. The cutting blade as described in claim 6, characterized in that, The ratio of the width of the second cutting portion on the first side to the width of the second cutting portion on the second side is in the range of 1.5 to 2.5; And / or, the ratio of the width of the first cutting portion on the first side to the width of the second cutting portion on the first side is in the range of 0.8 to 1.

2.

8. The cutting blade as described in claim 1, characterized in that, The height of the raised portion relative to the mounting surface ranges from 1.2mm to 3mm.

9. A cutting mechanism, characterized in that, It includes a cutter head and at least one cutting blade as claimed in any one of claims 1-8, the cutting blade being connected to the cutter head and extending from the circumferential edge of the cutter head.

10. The cutting mechanism as described in claim 9, characterized in that, The cutting blade is rotatably connected to the blade disc, which has a first limiting part. When the blade disc rotates in a first direction to drive the cutting blade to cut grass, the first side of the cutting part of the cutting blade abuts against the first limiting part, thereby fixing the position of the cutting blade relative to the blade disc.

11. The cutting mechanism as described in claim 10, characterized in that, The cutter head is also provided with a second limiting part, which is configured to abut against the side where the second side of the cutting part of the cutting blade is located, so as to restrict the cutting blade from continuing to rotate in a direction opposite to the first direction.

12. The cutting mechanism as described in claim 10, characterized in that, The cutter head is provided with a clearance groove, which is configured to allow at least a portion of the structure of the cutting blade to extend into it.

13. The cutting mechanism as described in claim 12, characterized in that, Along a direction opposite to the first direction, the depth of the clearance groove gradually increases.

14. The cutting mechanism as described in claim 12, characterized in that, The clearance groove is recessed on the lower surface of the cutter head and protrudes from the upper surface of the cutter head to form a protruding fan blade structure on the upper surface of the cutter head.

15. The cutting mechanism as described in claim 14, characterized in that, Along a direction opposite to the first direction, the distance between the upper surface of the fan blade structure and the upper surface of the cutter head gradually increases in the height direction.

16. The cutting mechanism as described in claim 9, characterized in that, The upper surface of the cutter head is provided with a plurality of fan blades, which are arranged radially along the direction from the center of the cutter head to the circumferential edge of the cutter head.

17. A lawnmower robot, characterized in that, It includes a drive mechanism and a cutting mechanism as described in any one of claims 9 to 16, wherein the cutting mechanism is connected to the output end of the drive mechanism.

Images