Blade and mower

Abstract

The utility model provides a blade and a mowing machine, the blade comprises a lifting section, a bending section and an arc-shaped cutting section, the lifting section is used for connecting a driving shaft so as to drive the blade to rotate through the driving shaft; the bending section is formed by bending and extending from at least one end of the lifting section in the direction of the rotating axis of the blade; the arc-shaped cutting section is connected with one end of the bending section away from the lifting section; the portions, located on the two sides of the central axis, of the projection of the blade on the rotating plane are arranged in a preset arc shape, and the middle of the preset arc shape and the two ends of the preset arc shape are not located in the same plane. Compared with the prior art, the blade is arranged to be in the arc streamline bent blade shape, the mowing resistance of the blade in the bent blade shape is small, airflow circulation is facilitated, the effect of mowing in a labor-saving mode can be achieved, the cutting power consumption is reduced, and noise and vibration in the cutting process can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model embodiment relates to electric tool technical field, especially a kind of blade and mower. BACKGROUND

[0002] With the development of society and economy, people's environmental awareness is getting stronger and stronger, lawn, grassland and so on enter our daily life in large quantities.Mower is a kind of used for cutting grass, vegetation, etc., pruning weeds and processing flat green lawn semi-automatic mechanical tool.Blade is the core component in mower, and the mower cuts grass, vegetation, etc.through blade, and the cutting speed and cutting efficiency of mower are related to the structure of blade.The blade of existing mower is usually straight strip, and the straight strip blade has the problems of large cutting resistance, large cutting power consumption, large blade noise and large vibration. CONTENT OF UTILITY MODEL

[0003] The utility model embodiment aims to provide a kind of blade and mower, to solve the problems of large cutting resistance, large cutting power consumption, large blade noise and large vibration of the blade of existing mower.

[0004] To solve the above technical problems, the embodiment of the utility model provides a kind of blade, comprising:

[0005] Lifting section, the lifting section is used to connect driving shaft, to drive the blade to rotate by the driving shaft;

[0006] Bending section, the bending section is bent and extended from at least one end of the lifting section along the direction where the rotation axis of the blade is located;

[0007] Arc-shaped cutting section, the arc-shaped cutting section is connected to one end of the bending section away from the lifting section;

[0008] Wherein, the projection of the blade on the rotation plane is located on the part of both sides of the central axis, and the part is provided with preset arc shape, and the middle part of the preset arc shape and the two ends of the preset arc shape are not in the same plane.

[0009] The utility model discloses a kind of blades, which are set to arc streamline type bending blade modeling, and the cutting resistance of the blade of bending blade modeling is small, which is conducive to airflow circulation, not only can realize the effect of labor-saving of cutting grass, so as to reduce cutting power consumption, but also can reduce noise and vibration when cutting.

[0010] Preferably, the bending angle of the blade is 70 degrees to 120 degrees, wherein the bending angle is the included angle between the central axis and the preset tangent line, and the tangent point of the preset tangent line is the intersection of the central axis and the boundary of the projection of the blade on the rotation plane.

[0011] Preferably, the distance between the two surfaces of the raised section and the arc-shaped cutting section opposite to each other in the direction along which the rotation axis is located is 5mm-30mm.

[0012] Preferably, each of the arc-shaped cutting sections has a cutting edge, and an end corner of each of the arc-shaped cutting sections away from the cutting edge extends along the direction along which the rotation axis is located to form a raised portion in a bending direction opposite to the bending direction of the bending section relative to the raised section in the rotation direction.

[0013] Preferably, the raised portion is provided with an arc-shaped gentle transition part close to the arc-shaped cutting section.

[0014] Preferably, the raised portion is tangent to the arc-shaped cutting section to form a tangent line, and the tangent line is provided in an arc line protruding towards the raised portion.

[0015] Preferably, one end of the tangent line is adjacent to the connection between the arc-shaped cutting section and the bending section, and the other end of the tangent line is adjacent to one end of the bending section away from the cutting edge.

[0016] Preferably, the raised portion is provided in a diverging shape.

[0017] Preferably, the arc-shaped cutting section is provided with the raised portion, and an end corner of the raised portion is provided in an arc-shaped chamfer.

[0018] In order to achieve the above-mentioned purpose, the utility model also provides a mower, including the above-mentioned blade. BRIEF DESCRIPTION OF DRAWINGS

[0019] One or more embodiments are exemplified by the pictures in the drawings corresponding thereto, which do not constitute a limitation on the embodiments, and the elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified, and the drawings do not constitute a proportional limit.

[0020] Figure 1 It is a perspective structural schematic view of the blade in the embodiments of the utility model;

[0021] Figure 2 It is Figure 1 It is a front view of the blade;

[0022] Figure 3 It is Figure 1 It is a top view of the blade.

[0023] Utility model drawing reference numeral explanation:

[0024] Blade 100, raised section 1, mounting hole 11, bent section 2, second arc-shaped gentle transition part 21, third arc-shaped gentle transition part 22, connecting blade 23, arc-shaped cutting section 3, cutting blade 31, raised part 4, first arc-shaped gentle transition part 41, arc-shaped chamfer 42, transition tangent 5, rotation axis 200, central axis 300, preset tangent 400.

[0025] The implementation, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0028] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that those skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is also not within the protection scope required by the utility model.

[0029] The utility model provides a kind of blade, which can be used in mower, Figures 1 to 3 A preferred embodiment of the blade provided by the utility model is shown.

[0030] Please refer to Figures 1 to 3 In the embodiment, the blade 100 includes the raised section 1, two bent sections 2 and two arc-shaped cutting sections 3.

[0031] Please refer to Figures 1 to 3The raised section 1 is used to connect a driving shaft (not shown in the figure) to drive the blade 100 to rotate.

[0032] Specifically, the blade 100 is usually in a long strip shape, the raised section 1 is located in the middle of the blade 100, and the blade 100 is installed on the driving shaft of the mower through the raised section 1, so that the driving shaft can drive the blade 100 to rotate to mow the grass through the rotating blade 100. The direction in which the rotation axis 200 of the blade 100 is located is defined as the upward and downward direction, and the blade 100 is installed at the lower end of the driving shaft.

[0033] Optionally, referring to Figures 1 to 3 In this embodiment, the raised section 1 is provided with a mounting hole 11, the mounting hole 11 is provided on the raised section 1 in a penetrating manner from top to bottom, and the blade 100 is sleeved on the driving shaft through the mounting hole 11. In other embodiments, the number of blades can be one, two or three.

[0034] Referring to Figures 1 to 3 Two bending sections 2 are respectively formed by bending and extending from both ends of the raised section 1 along the direction of the rotation axis 200 of the blade 100.

[0035] Specifically, the two ends of the raised section 1 in the extension direction are respectively bent downward to form two bending sections 2, the upper ends of the two bending sections 2 are connected to the raised section 1, and the lower ends of the two bending sections 2 are located on the lower side of the raised section 1. The bending section 2 is usually inclined downward relative to the raised section 1, and the bending angle of the bending section 2 relative to the raised section 1 is an acute angle.

[0036] Optionally, referring to Figures 1 to 3 In this embodiment, the part of the bending section 2 close to the raised section 1 is provided in an arc-shaped gentle transition manner, the upper end of the bending section 2 is provided with a second arc-shaped gentle transition part 21, and the bending section 2 is connected to the raised section 1 through the second arc-shaped gentle transition part 21. In this way, the second arc-shaped gentle transition part 21 is arranged at the connection between the bending section 2 and the raised section 1, which can reduce the wind resistance at the connection between the bending section 2 and the raised section 1 during the rotation of the blade 100.

[0037] Referring to Figures 1 to 3 Two arc-shaped cutting sections 3 are respectively connected to one end of the two bending sections 2 away from the raised section 1.

[0038] Specifically, the two arc-shaped cutting sections 3 are connected to the lower ends of the two bending sections 2 respectively, and the cutting edges 31 are arranged at the same end of the two arc-shaped cutting sections 3 in the rotating direction of the blade 100. During the rotation of the blade 100, the two arc-shaped cutting sections 3 can cut grass through the cutting edges 31. Moreover, the two arc-shaped cutting sections 3 are connected to the lifting section 1 through the two downwardly inclined bending sections 2 respectively, so that a space is formed between the lower surfaces of the two arc-shaped cutting sections 3 and the lower surface of the lifting section 1, thereby avoiding the obstruction of the lifting section 1 to the cutting of grass, effectively reducing the cutting resistance of the blade 100, and achieving the effect of energy saving.

[0039] Referring to Figures 1 to 3 , the projection of the blade 100 on the rotating plane is arranged in a preset arc shape on both sides of the central axis 300, and the middle part of the preset arc shape is not in the same plane as the two ends of the preset arc shape.

[0040] Specifically, the blade 100 is centrally symmetrically arranged, the blade 100 is arranged in an S-shaped bending knife, the center of the blade 100 is located on the lifting section 1, the rotating plane of the blade 100 is parallel to the horizontal plane, the central axis 300 is parallel to the rotating plane of the blade 100, and the central axis 300 is perpendicular to the length direction of the blade 100. The central axis 300 divides the projection of the blade 100 on the rotating plane into two parts, each part of the projection is arranged in a preset arc shape, and the cutting edges 31 of the arc-shaped cutting sections 3 are located in the concave parts of the preset arc shapes, so that the blade 100 is arranged in an arc-shaped streamline type. The blade 100 is arranged in an arc-shaped streamline type bending knife, the cutting resistance of the blade 100 in the bending knife type is small, which is conducive to the flow of air, not only can realize the effect of labor-saving cutting, thereby reducing the cutting power consumption, but also can reduce the noise and vibration during cutting.

[0041] The utility model discloses a blade 100 is arranged in an arc-shaped streamline type bending knife, the cutting resistance of the blade 100 in the bending knife type is small, which is conducive to the flow of air, not only can realize the effect of labor-saving cutting, thereby reducing the cutting power consumption, but also can reduce the noise and vibration during cutting.

[0042] Optionally, referring to Figures 1 to 3 In the embodiment, the bending angle a of the blade 100 is 70 degrees to 120 degrees.

[0043] Specifically, the bending angle a is the included angle between the central axis 300 and the preset tangent 400, and the tangent point of the preset tangent 400 is the intersection of the boundary of the projection of the central axis 300 on the rotating plane and the blade 100. By optimizing the value range of the bending angle a of the blade 100, the cutting resistance of the blade 100 can be reduced, which is conducive to the flow of air, and the structural strength of the blade 100 as a whole can be improved, and the cutting effect of the blade 100 can be improved.

[0044] Optionally, referring to Figures 1 to 3 In the embodiment, the interval H between the two surfaces of the raised section 1 and the arc-shaped cutting section 3 opposite to each other in the direction of the rotation axis 200 is 5mm-30mm.

[0045] Specifically, H is the interval between the upper surface of the raised section 1 and the lower surface of the arc-shaped cutting section 3 in the up-down direction, so that by preferably selecting the interval H between the raised section 1 and the arc-shaped cutting section 3, the cutting resistance of the blade 100 can be reduced and the cutting resistance of the blade 100 can be reduced.

[0046] Optionally, referring to Figures 1 to 3 In the embodiment, each arc-shaped cutting section 3 has an end corner away from the cutting edge 31 in the rotation direction, and the end corner is bent to form a raised portion 4 along the direction of the rotation axis 200, and the bending direction of the raised portion 4 relative to the arc-shaped cutting section 3 is opposite to the bending direction of the bending section 2 relative to the raised section 1.

[0047] Specifically, each arc-shaped cutting section 3 has two end corners opposite to each other in the rotation direction of the blade 100, and one of the two end corners away from the cutting edge 31 is bent upward to form a raised portion 4. The blade 100 is provided with two raised portions 4, and in the process of rotating the blade 100, the raised portion 4 drives the air to generate additional turbulent flow moving from the lower part of the blade 100 to the upper part, and the additional turbulent flow generates suction effect on the grass below the blade 100, so that the upper end of the grass not cut by the blade 100 is quickly sucked into the cutting area of the blade 100 under the suction effect of the turbulent flow, and then cut by the blade 100. In this way, the grass to be cut can be quickly sucked into the cutting area of the blade 100, and the cutting is completed, so that the advancing speed of the mower is improved, the suction turbulent flow is large, the cutting is more smooth, and the grass cutting quality is good.

[0048] Optionally, referring to Figures 1 to 3 In the embodiment, the part of the raised portion 4 close to the arc-shaped cutting section 3 is provided with an arc-shaped gentle transition part 41. The raised portion 4 is connected to the arc-shaped cutting section 3 through the arc-shaped gentle transition part 41, so that the arc-shaped gentle transition part 41 is arranged at the connection between the raised portion 4 and the arc-shaped cutting section 3, which can reduce the wind resistance at the connection between the raised portion 4 and the arc-shaped cutting section 3 in the process of rotating the blade 100.

[0049] Optionally, referring to Figures 1 to 3 In the embodiment, the raised portion 4 and the arc-shaped cutting section 3 are tangent to each other to form a tangent line 5, and the tangent line 5 is provided in an arc line protruding towards the raised portion 4.

[0050] Further, referring to Figures 1 to 3In the embodiment, one end of the excessive tangent line 5 is adjacent to the connection between the arc-shaped cutting section 3 and the bending section 2, and the other end of the excessive tangent line 5 is adjacent to one end of the cutting edge 31 away from the bending section 2.

[0051] Specifically, during the rotation cutting of the blade 100, the cutting speed of the position far away from the center of the blade 100 is different from the cutting speed of the position close to the center of the blade 100, and therefore, the airflow from the end of the blade 100 to the center of the blade 100 is also different. The excessive tangent line 5 is set as an arc line, so that the distance between the cutting edge 31 and the raised portion 4 is also different, thereby making the airflow uniform. The upper end of the uncut grass is uniformly sucked into the cutting area of the blade 100 under the suction of the airflow, and then is cut by the blade 100. In this way, the cutting is more uniform, the flatness of the blade 100 cutting the lawn is improved, and the grass cutting quality is improved.

[0052] Optionally, referring to Figures 1 to 3 In the embodiment, the raised portion 4 is set in a diverging shape.

[0053] Optionally, referring to Figures 1 to 3 In the embodiment, the end angle of the raised portion 4 of the arc-shaped cutting section 3 is set as an arc chamfer 42.

[0054] Specifically, the raised portion 4 is set in a diverging shape from the top of the raised portion 4 to the direction of the excessive tangent line 5, and the peripheral side surface of the raised portion 4 is set as an arc curved surface. The arc-shaped cutting section 3 is provided with the diverging raised portion 4, so that not only the airflow can be correctly guided, but also the noise and vibration during cutting can be reduced.

[0055] Optionally, referring to Figures 1 to 3 In the embodiment, the part of each bending section 2 connecting the arc-shaped cutting section 3 is set as an arc-shaped gentle transition, and the lower end of the bending section 2 is provided with a third arc-shaped gentle transition portion 22. The bending section 2 is connected to the arc-shaped cutting section 3 through the third arc-shaped gentle transition portion 22. In this way, the third arc-shaped gentle transition portion 22 is arranged at the connection between the bending section 2 and the arc-shaped cutting section 3, so that the wind resistance at the connection between the bending section 2 and the arc-shaped cutting section 3 can be reduced during the rotation of the blade 100.

[0056] Optionally, referring to Figures 1 to 3 Figures 1 to 3 In the embodiment, the same end of the two bending sections 2 in the rotation direction of the blade 100 is provided with a connecting edge 23, and the connecting edge 23 of each bending section 2 connects the cutting edge 31 of the corresponding arc-shaped cutting section 3. The connecting edge 23 is arranged on the bending section 2, so that the length of the cutting position of the blade 100 can be extended.

[0057] The blade 100 is arc-shaped and streamlined as a whole and has an acute angle edge that cannot block air flow, and the whole arc is excessive, which is beneficial to air flow circulation. The blade 100 is provided with a diverging-shaped raised portion 4, which can guide wind and reduce noise vibration. The overall layout of the blade 100 is reasonable, and the machining difficulty and cost of the blade 100 are reduced.

[0058] The utility model also provides a mower, the mower includes the blade, because the blade adopted the technical scheme of above -mentioned embodiment, therefore has the beneficial effect brought by the technical scheme of above -mentioned embodiment.

[0059] Specifically, the mower further comprises a driving shaft, and the raised section 1 of the blade 100 is connected to the driving shaft, so that the driving shaft can drive the blade 100 to rotate to mow grass through the rotating blade 100.

[0060] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and the drawings contents or directly / indirectly applied in other related technical fields under the utility model concept of the utility model is included in the patent protection range of the utility model.

Claims

1. A blade, characterized in that: include: a lifting section, the lifting section being used to connect to a drive shaft so as to drive the blade to rotate via the drive shaft; a bent section, the bent section being formed by bending and extending from at least one end of the raised section along the direction of the rotation axis of the blade; an arc-shaped cutting segment, the arc-shaped cutting segment being connected to an end of the bending segment away from the raised segment; Parts of the projection of the blade on the rotation plane located on both sides of the central axis are arranged in a preset arc shape, and the middle of the preset arc and the two ends of the preset arc are not in the same plane.

2. The blade according to claim 1, wherein The bending angle of the blade is 70 degrees to 120 degrees, wherein the bending angle is the angle between the central axis and a preset tangent line, and the tangent point of the preset tangent line is the intersection of the central axis and the boundary of the projection of the blade on the rotation plane.

3. The blade according to claim 1, wherein The distance between the two surfaces of the raised section and the arc-shaped cutting section facing away from each other in the direction of the rotation axis is 5 mm to 30 mm.

4. The blade according to claim 1, wherein Each of the arc-shaped cutting segments has a cutting edge, and each of the arc-shaped cutting segments is bent and extended in the direction of the rotation axis at an end angle away from the cutting edge in the rotation direction to form a raised portion, and the bending direction of the raised portion relative to the arc-shaped cutting segment is opposite to the bending direction of the bending segment relative to the raised segment.

5. The blade according to claim 4, wherein The portion of the raised portion close to the arc-shaped cutting segment is arranged in an arc-shaped smooth transition.

6. The blade according to claim 5, wherein The raised portion is excessively tangent to the arc-shaped cutting segment to form an excessive tangent line, and the excessive tangent line is arranged as an arc line convex toward the raised portion.

7. The blade according to claim 6, wherein One end of the transition tangent line is adjacent to the connection between the arc-shaped cutting segment and the bending segment, and the other end of the transition tangent line is adjacent to an end of the cutting edge away from the bending segment.

8. The blade according to claim 4, wherein The raised portion is arranged in a divergent shape.

9. The blade according to claim 4, wherein: The arc-shaped cutting segment is provided with the warping portion, and the end corner of the warping portion is arranged in an arc-shaped chamfer.

10. A lawn mower, characterized in that: The invention comprises a blade according to any one of claims 1 to 9.

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