Lawn maintenance mower with safety protection mechanism

Abstract

The present invention discloses a lawn maintenance mower with a safety protection mechanism, which relates to the technical field of lawn mowers. The lawn mowing action is completed by a high-speed rotating blade similar to the structure of a conventional lawn mower. The overall structure is placed within the protection range of a mounting plate, and the structure of a transmission rod used to connect the blade is improved. Specifically, an auxiliary rod is added at an internal position thereof. The auxiliary rod has a two-way action of preventing weed entanglement and air blowing assistance. Its essence is to prevent weed entanglement from affecting the movement stability of the transmission rod. The air blowing assistance is to blow away the chopped grass to avoid accumulation at the connection position of the transmission rod. The key content of the present invention lies in the restriction method during the operation of the blade, specifically, it is combined with the "electromagnetic transmission" principle and the magnetic field strength of the winding coil assembly to limit the tilting method of the blade, which is mainly an auxiliary protection method for the movement process of the overall device.

Description

Technical Field

[0001] The invention relates to the technical field of lawn mowers, and in particular to a lawn maintenance lawn mower with a safety protection mechanism. Background Art

[0002] The lawn mowers used in lawn maintenance essentially trim vegetation through structures such as continuously rotating reels. For reference, the relevant content disclosed in publication number CN115067064A can be referred to. They are generally divided into three types: hand-push type, riding type and self-propelled type.

[0003] The reel and other structures of the lawn mower are relatively sharp, and their rotation speed is relatively high, which may cause risks of cuts to users during use. In particular, in certain circumstances, such as when water enters the handle support part of the machine, the lawn mower may not be turned off or started without a key, which may pose a risk of cuts to users. It should also be noted that in the long-term operation state, the transmission rod structure connected to the reel will continue to be drawn into weeds. The continuously entangled weeds directly affect the working stability of the reel structure. If regular cleaning is adopted, it is more troublesome and there is also a risk of being cut by the reel during the cleaning process.

[0004] This application proposes a solution to this problem. Summary of the invention

[0005] The purpose of the present invention is to provide a lawn maintenance mower with a safety protection mechanism, based on the basic structure of the reel in the mower, because it is relatively sharp and maintains a high-speed rotation state. In addition, during continuous operation, its internal related structures may continue to entangle weeds, directly affecting the working stability of structures such as the reel.

[0006] The object of the present invention can be achieved by the following technical solution: A lawn maintenance mower with a safety protection mechanism includes a body assembly and a cutter assembly, wherein the cutter assembly is installed on the chassis of the body assembly, and the cutter assembly includes a drive assembly, a mounting plate, a blade, and a transmission rod matched with the drive assembly;

[0007] The mounting plate is mounted on the transmission rod, the blades are arranged in a circular array along the center point of the transmission rod, a mounting sleeve corresponding to the blade is mounted on the outside of the transmission rod, and a cooperating rod is arranged in the inside of the transmission rod, an auxiliary blade is mounted on the outer wall of the cooperating rod corresponding to the upper side of the mounting sleeve, and a cooperating groove corresponding to the auxiliary blade is opened on the transmission rod;

[0008] A winding coil assembly is installed at a position of the cutter head assembly corresponding to the blade, and a permanent magnet block is installed in an inner position of the winding coil assembly corresponding to the blade.

[0009] It is further configured as follows: the transmission rod is rotationally connected to the mounting plate, and a line alignment ring corresponding to the blade is installed on the lower side of the mounting plate.

[0010] It is further configured as follows: a ball corresponding to the blade is installed on the line-fixing ring, the ball is located in the middle of the blade, and the ball is movably connected to the blade.

[0011] It is further configured as follows: a ball head is provided at the center point of one end of the blade, and the center point of the other end of the blade is rotationally connected to the mounting plate, and the blade is movably connected to the mounting sleeve through the ball head.

[0012] It is further configured as follows: the number of the winding coil assemblies arranged in the direction from top to bottom is two, and the arrangement position of the permanent magnet block matches the arrangement position of the winding coil assembly.

[0013] It is further configured as follows: the length of the cooperative groove is greater than the length of the auxiliary blade, the outer edge of one end of the auxiliary blade extends to the outer position of the transmission rod, and the auxiliary blade is located in the middle position of the mounting plate and the mounting sleeve.

[0014] It is further configured as follows: the cooperation rod and the transmission rod are movably connected, the interior of the cooperation rod is hollow, an air nozzle sleeve is provided at the top end of the cooperation rod, and a conical cap is installed at the lower end of the cooperation rod.

[0015] It is further configured as follows: an air release groove is provided at an outer position of the cooperation rod corresponding to the lower side of the mounting sleeve, and the cross section of the conical cap is in a downwardly curved arch shape.

[0016] It is further configured that: the blade is directional rotated by the driving assembly and the transmission rod, and the blade includes the following two states during the rotation process:

[0017] State 1: The width direction of the blade is kept parallel to the vertical direction through the winding coil assembly and the permanent magnet block;

[0018] State 2: The width direction and vertical direction of the blade are tilted by the winding coil assembly and the permanent magnet block.

[0019] The present invention has the following beneficial effects:

[0020] 1. The structure is basically similar to that of a conventional riding lawn mower. The sharp structure of the blade is placed in the protection range inside the mounting plate. Specifically, the inside of the transmission rod is improved, and a synchronously moving cooperative rod is added. An auxiliary blade is further added to the cooperative rod. The purpose of the auxiliary blade is to passively chop the weeds that may be entangled on the transmission rod to prevent the continuous entanglement of the weeds from affecting the stability of the transmission rod during movement. In addition, during the continuous rotation of the transmission rod, the chopped grass is blown from bottom to top by means of air blowing assistance, so as to prevent the accumulation of chopped grass and further affect the stability of the transmission rod during movement.

[0021] 2. The key content of the present invention lies in the further optimization method for the blade. The difference from the conventional fixed blade is that the blade is movable. In the non-starting state, the placement direction of the blade is consistent with the direction of gravity. In the starting state, it is tilted due to the influence of centrifugal force. Based on this, "electromagnetic transmission" is further used to limit the tilt direction of the blade. Its purpose is to restore the placement direction of the blade to be consistent with the direction of gravity through forced restriction when an abnormal state occurs, so that it has no cutting ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a structural schematic diagram of a lawn maintenance mower with a safety protection mechanism proposed by the present invention;

[0024] Figure 2 This is a schematic structural diagram of a cutter disc assembly in a lawn maintenance mower with a safety protection mechanism proposed by the present invention;

[0025] Figure 3 The lawn maintenance mower with a safety protection mechanism proposed by the present invention Figure 2 Bottom view of

[0026] Figure 4 A cutaway view of a mounting plate in a lawn maintenance mower with a safety protection mechanism according to the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the blade in the lawn maintenance mower with a safety protection mechanism proposed by the present invention;

[0028] Figure 6 The lawn maintenance mower with a safety protection mechanism proposed by the present invention Figure 5 Split diagram of ;

[0029] Figure 7 A cross-sectional view of a transmission rod in a lawn maintenance mower with a safety protection mechanism proposed by the present invention;

[0030] Figure 8 The lawn maintenance mower with a safety protection mechanism proposed by the present invention Figure 7 Partial front view of .

[0031] In the figure: 1. body assembly; 2. cutter disc assembly; 3. drive assembly; 4. mounting plate; 5. blade; 6. winding coil assembly; 7. transmission rod; 8. ball bearing; 9. alignment ring; 10. mounting sleeve; 11. permanent magnet block; 12. cooperating rod; 13. auxiliary blade; 14. conical cap; 15. venting groove; 16. cooperating groove. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1: The lawn mower realizes cutting action by high-speed rotating blades. However, in special circumstances, because the blades are relatively sharp and keep rotating at high speed, and in the continuous operation process, the internal related structures may continue to entangle weeds, which directly affects the working stability of the reel and other structures. The following technical solutions are proposed:

[0034] Reference Figures 1 to 8 The lawn maintenance mower with a safety protection mechanism in this embodiment includes a body assembly 1 and a cutter assembly 2. The cutter assembly 2 is installed on the chassis of the body assembly 1, and the cutter assembly 2 includes a drive assembly 3, a mounting plate 4, a blade 5, and a transmission rod 7 that cooperates with the drive assembly 3;

[0035] The mounting plate 4 is mounted on the transmission rod 7, and the blades 5 are arranged in a circular array along the center point of the transmission rod 7. A mounting sleeve 10 corresponding to the blades 5 is mounted on the outside of the transmission rod 7, and a cooperating rod 12 is arranged in the inner position of the transmission rod 7. An auxiliary blade 13 is mounted on the outer wall position of the cooperating rod 12 corresponding to the upper side of the mounting sleeve 10, and a cooperating groove 16 corresponding to the auxiliary blade 13 is opened on the transmission rod 7;

[0036] A winding coil assembly 6 is installed at a position of the cutter head assembly 2 corresponding to the blade 5 , and a permanent magnet block 11 is installed in an inner position of the winding coil assembly 6 corresponding to the blade 5 .

[0037] Technical solution description: Figure 1 For example, the overall structure is based on a conventional riding lawn mower, and its essence is to drive the blade 5 to rotate at high speed through the driving assembly 3 to perform the mowing action. The body assembly 1 and the driving assembly 3 are not described in detail in the present invention, and can be a belt drive method. The overall blade 5 is placed in the cutter disc assembly 2 to avoid the risk of cutting the operator in the event of an accident.

[0038] However, the present invention firstly aims at improving the structure of the transmission rod 7. Figure 7 and Figure 8 For example, during the mowing process, some weeds will be rolled into the connection between the transmission rod 7 and the mounting plate 4. The continuously entangled weeds will directly affect the movement of the transmission rod 7, which is specifically manifested as follows:

[0039] In order to solve the problem of reducing the rotation speed of the transmission rod 7 or causing the transmission rod 7 to become unstable and vibrate violently, a cooperative rod 12 is added inside the transmission rod 7. The cooperative rod 12 is essentially free to move inside the transmission rod 7, and can move up and down and rotate freely. However, a plurality of auxiliary blades 13 are added to the cooperative rod 12. The cooperative rod 12 rotates synchronously with the transmission rod 7. Then, during the continuous mowing action, when some weeds are entangled on the transmission rod 7, they will be chopped by the auxiliary blades 13, so that the problem of weed entanglement will not occur during long-term operation.

[0040] Embodiment 2: Explanation of the movement of the blade in Embodiment 1:

[0041] The transmission rod 7 is rotatably connected to the mounting plate 4, a positioning ring 9 corresponding to the blade 5 is installed on the lower side of the mounting plate 4, a ball 8 corresponding to the blade 5 is installed on the positioning ring 9, the ball 8 is located in the middle of the blade 5, and the ball 8 and the blade 5 are movably connected, a ball head is provided at the center point of one end of the blade 5, and the center point of the other end of the blade 5 is rotatably connected to the mounting plate 4, the blade 5 is movably connected to the mounting sleeve 10 through the ball head, the number of winding coil assemblies 6 arranged in the direction from top to bottom is two, and the setting position of the permanent magnet block 11 matches the setting position of the winding coil assembly 6;

[0042] The blade 5 is directional rotated by the driving assembly 3 and the transmission rod 7, and the blade 5 includes the following two states during the rotation process:

[0043] State 1: The width direction of the blade 5 is kept parallel to the vertical direction through the winding coil assembly 6 and the permanent magnet block 11;

[0044] State 2: The width direction and the vertical direction of the blade 5 are in an inclined state through the winding coil assembly 6 and the permanent magnet block 11.

[0045] Solution Description: Combined Figure 5 To explain: when the mower is not started, each blade 5 maintains the initial state under the action of gravity, which corresponds to the above-mentioned state 1, and its essence is that its width direction is consistent with the gravity direction; then when the mower is started, the transmission rod 7 drives the mounting sleeve 10 to rotate at a high speed, thereby driving each blade 5 to rotate synchronously. In this state, under the action of centrifugal force, each blade 5 switches from the initial state to a tilted state;

[0046] However, the following is explained for the above-mentioned state 2: when the blade 5 is not interfered by any external force, although each blade 5 will remain tilted, specifically, the tilting of the blade 5 is completed by the ball 8, but this process may cause the tilting angles of the blades 5 at local positions to be inconsistent, thereby also aggravating the shaking of each blade 5. In this regard, in this embodiment, the tilting angle of the blade 5 is limited by "electromagnetic transmission", and the specific expression is as follows:

[0047] S1: When the winding coil assembly 6 is energized to generate an electromagnetic field, and because the permanent magnet block 11 added to each blade 5 cooperates with the electromagnetic field, in theory the permanent magnet block 11 needs to move appropriately around the electromagnetic field. However, because the blade 5 itself has "obtained" kinetic energy from the drive assembly 3, Figure 5 Taking the top view of as an example, when the integral blade 5 rotates clockwise, it is necessary to ensure that the electromagnetic block 11 rotates counterclockwise relative to the electromagnetic field;

[0048] S2: Explanation in combination with S1: Because it is necessary to ensure that the blade 5 remains in an inclined state in this embodiment, the amount of electricity passed through the two winding coil assemblies 11 can be limited to limit the electromagnetic field strength generated by each, thereby limiting the inclination angle of the blade 5. When the entire blade 5 keeps rotating clockwise, it is also necessary to ensure that each blade 5 also maintains a clockwise inclination direction under the dual effects of centrifugal force and electromagnetic field. The essence is: because the blade 5 keeps rotating clockwise, it is necessary to further ensure that the winding coil assembly 6 provides counterclockwise resistance to the permanent magnet block 11, but the limiting angle of the blade 5 can be limited by further limiting the "resistance" value of the two winding coil assemblies 6 to the blade 5;

[0049] S3: S1 and S2 are summarized for explanation. Because during the continuous operation of the lawn mower, unexpected situations may occur. For example, when water enters the handle support part of the machine, the lawn mower may not be able to be turned off or started without a key, which may pose a risk of cutting to the user. The electromagnetic transmission method provided in this embodiment is mainly used to solve this problem. Specifically, the rotation power starting method of the entire blade 5 remains unchanged, and it is still mainly based on the electric switch. However, when each blade 5 rotates at a high speed, the winding coil assembly 6 needs to be energized synchronously. The inclination angle of each blade 5 can be pre-set, and the power supply of the two winding coil assemblies 6 can be limited in accordance with the rotation speed of the transmission rod 7, and the conversion method of power supply-electromagnetic field is combined for calculation. This part involves relevant parameters and is not explained in the present invention.

[0050] It should be noted that: when the above-mentioned unexpected situation occurs, the amount of power supplied to the two winding coil assemblies 6 can be further changed, or even the power supply method of the two winding coil assemblies 6 can be changed. Specifically, when the blade 5 rotates at high speed through the driving assembly 3, the inclination angle of the blade 5 is limited by electromagnetic transmission. The blade 5 can be restored to the initial position of state one, or the blade 5 can be tilted in the opposite direction. As shown above, when the blade 5 keeps rotating clockwise during normal operation, when an unexpected situation occurs, the blade 5 can be switched to counterclockwise rotation. In this state, the risk of the user being cut is avoided.

[0051] Embodiment 3: Explanation of the operation mode of the transmission rod in Embodiment 1:

[0052] The length of the cooperative groove 16 is greater than the length of the auxiliary blade 13. The outer edge of one end of the auxiliary blade 13 extends to the external position of the transmission rod 7, and the auxiliary blade 13 is located in the middle position of the mounting plate 4 and the mounting sleeve 10. The cooperative rod 12 is movably connected to the transmission rod 7, and the interior of the cooperative rod 12 is hollow. An air nozzle sleeve is provided at the top position of the cooperative rod 12, and a conical cap 14 is installed at the lower end position of the cooperative rod 12. An air relief groove 15 is opened at the external position of the lower side of the mounting sleeve 10 of the cooperative rod 12, and the cross-section of the conical cap 14 is a downward curved arch shape.

[0053] Solution Description: Combined Figure 8 To explain: the cooperation rod 12 and the transmission rod 7 keep synchronous rotation, but the length difference between the cooperation groove 16 and the auxiliary blade 13 needs to be further limited. It can be understood that: when the cooperation rod 12 rotates synchronously at a high speed, the cooperation rod 12 has the ability to move up and down slightly. The purpose of this method is to ensure that the auxiliary blade 13 can fully cut the entangled weeds;

[0054] However, it should be noted that: when the blade 5 rotates at high speed to perform the mowing action, it can also be inflated through the air nozzle sleeve. The injected gas flows from top to bottom. When it flows to the conical cap 14, due to the influence of the curvature of the upper surface of the conical cap 14, the injected gas eventually changes to a direction from bottom to top. The purpose of this is to avoid the accumulation of chopped grass clippings on the upper side of each blade 5, accelerate the "floating" of grass clippings under the action of high-speed airflow, and avoid accumulation at the connection between the transmission rod 7 and the mounting plate 4.

[0055] In summary: similar to the structure of a conventional lawn mower, the mowing action is completed by a high-speed rotating blade. The overall structure is placed within the protection range of the mounting plate, and the structure of the transmission rod used to connect the blade is improved. Specifically, an auxiliary rod is added at its internal position. The auxiliary rod has a two-way action of preventing weed entanglement and air-assisted. Its essence is to prevent weed entanglement from affecting the movement stability of the transmission rod. The air-assisted method is to blow away the chopped grass to avoid accumulation at the connection position of the transmission rod. The key content of the present invention lies in the restriction method during the operation of the blade, specifically, it is combined with the "electromagnetic transmission" principle and the magnetic field strength of the winding coil assembly to limit the tilting method of the blade, which is mainly an auxiliary protection method for the movement process of the overall device.

[0056] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A lawn maintenance mower with a safety protection mechanism, comprising a body assembly (1) and a blade assembly (2), characterized in that: The blade assembly (2) is mounted on the chassis of the vehicle body assembly (1), and the blade assembly (2) includes a drive assembly (3), a mounting plate (4), a blade (5), and a transmission rod (7) that cooperates with the drive assembly (3); The mounting plate (4) is mounted on the transmission rod (7); the blades (5) are arranged in a circular array along the center point of the transmission rod (7); a mounting sleeve (10) corresponding to the blades (5) is mounted on the outside of the transmission rod (7); an assisting rod (12) is arranged inside the transmission rod (7); an auxiliary blade (13) is mounted on the assisting rod (12) at a position on the outer wall of the upper side of the mounting sleeve (10); and an assisting groove (16) corresponding to the auxiliary blade (13) is provided on the transmission rod (7); A winding coil assembly (6) is installed at a position of the cutter disc assembly (2) corresponding to the blade (5); a permanent magnet block (11) is installed in an inner position of the winding coil assembly (6) corresponding to the blade (5); the transmission rod (7) is rotatably connected to the mounting plate (4); a line alignment ring (9) corresponding to the blade (5) is installed at a lower position of the mounting plate (4); a ball bearing (8) corresponding to the blade (5) is installed on the line alignment ring (9); the ball bearing (8) is located at a middle position of the blade (5); and the ball bearing (8) and the blade (5) are movably connected; a ball head is provided at a center point of one end of the blade (5); and a center point of the other end of the blade (5) is rotatably connected to the mounting plate (4); and the blade (5) is movably connected to the mounting sleeve (10) via the ball head.

2. The lawn maintenance mower with a safety protection mechanism according to claim 1, characterized in that: The number of the winding coil assemblies (6) arranged in the direction from top to bottom is two, and the arrangement position of the permanent magnet block (11) matches the arrangement position of the winding coil assembly (6).

3. The lawn maintenance mower with a safety protection mechanism according to claim 1, characterized in that: The length of the cooperative groove (16) is greater than the length of the auxiliary blade (13), an outer edge of one end of the auxiliary blade (13) extends to the outside position of the transmission rod (7), and the auxiliary blade (13) is located in the middle position of the mounting plate (4) and the mounting sleeve (10).

4. The lawn maintenance mower with a safety protection mechanism according to claim 1, characterized in that: The cooperating rod (12) and the transmission rod (7) are movably connected, and the interior of the cooperating rod (12) is hollow. An air nozzle sleeve is provided at the top end of the cooperating rod (12), and a conical cap (14) is installed at the bottom end of the cooperating rod (12).

5. The lawn maintenance mower with a safety protection mechanism according to claim 4, characterized in that: An air release groove (15) is provided on the outer position of the lower side of the cooperating rod (12) corresponding to the mounting sleeve (10), and the cross section of the conical cap (14) is in the shape of a downwardly curved arch.

6. The lawn maintenance mower with a safety protection mechanism according to any one of claims 1 to 5, characterized in that: The blade (5) is subjected to directional rotation via the driving assembly (3) and the transmission rod (7), and the blade (5) has the following two states during the rotation process: State 1: The width direction of the blade (5) is kept parallel to the vertical direction by means of the winding coil assembly (6) and the permanent magnet block (11); State 2: The width direction and the vertical direction of the blade (5) are in an inclined state through the winding coil assembly (6) and the permanent magnet block (11).

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