Lawn mower and its steering control method

Abstract

The present invention provides a lawn mower and a steering control method therefor. The lawn mower includes a main body portion, the main body portion includes traveling wheels and a motor, and the motor drives the traveling wheels to travel; a support portion connected to the main body portion for an operator to hold with both hands; and an operation portion for adjusting the rotation speed and / or steering of the motor, the operation portion being connected to the support portion and being configured to be operable when the operator holds the support portion. Compared with the prior art, the structure of the present invention is simple and only small-amplitude hand movements are required to control the forward / backward movement, turning and zero-turning of the lawn mower, effectively maintaining the stability and balance of the human body center of gravity and making the control more convenient and safe.

Description

Technical Field

[0001] The present invention relates to a lawn mower and a steering control method thereof, belonging to the field of garden tools. Background Art

[0002] Currently, electric drive stand-on zero-turn lawn mowers are gradually replacing traditional gasoline drive stand-on zero-turn lawn mowers, and their operation methods are exactly the same as those of traditional gasoline drive stand-on zero-turn lawn mowers.

[0003] Since the operator is driving in a standing position, the operator's hands must always hold the handrails tightly to maintain body balance. When switching between forward and backward, the operator needs to change hands to hold the front and rear different handrails to switch the direction of the joystick. When making a zero-turn, it is even more necessary to operate separately on the left and right and in the reverse direction, which brings great inconvenience to the operator.

[0004] In view of this, it is indeed necessary to provide a lawn mower and a steering control method thereof to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a lawn mower and a steering control method thereof, making the operation more convenient and safe.

[0006] To achieve the above purpose, the present invention provides a lawn mower, including: a main body part, the main body part includes traveling wheels and a motor, and the motor drives the traveling wheels to travel; a support part, the support part is connected to the main body part for the operator to hold with both hands; an operation part, used to adjust the rotation speed and / or steering of the motor, the operation part is connected to the support part, and the operation part is configured to be operable when the operator holds the support part.

[0007] As a further improvement of the present invention, a pair of operation parts are provided, and each has a detection part and a connector electrically connected to the detection part. The detection part is used to send an operation signal according to the displacement generated by the operator's hand operation.

[0008] As a further improvement of the present invention, the detection part is a potentiometer type sensor, which can generate different displacements according to the amplitude of hand operation and output corresponding voltage values. The displacements include linear displacement and / or angular displacement.

[0009] As a further improvement of the present invention, the lawn mower is also provided with a controller. The controller establishes an electrical connection with the operation part through the connector, and sends a control instruction to the lawn mower according to the operation signal sent by the detection part. The control instruction includes a forward / backward instruction, a turning instruction, and a zero-turn instruction.

[0010] As a further improvement of the present invention, the operator's hand operation includes the left and right hands operating the pair of operating parts in the same direction and the left and right hands operating the pair of operating parts in opposite directions.

[0011] As a further improvement of the present invention, the same-direction operation includes a clockwise operation from the initial position to the front end position and a counterclockwise operation from the initial position to the rear end position;

[0012] The opposite direction operation includes operating the left hand in a counterclockwise direction while the right hand operates in a clockwise direction, and operating the left hand in a clockwise direction while the right hand operates in a counterclockwise direction.

[0013] As a further improvement of the present invention, when the left and right hands operate in the same direction and with the same amplitude, the control instruction is a forward / backward instruction;

[0014] When the left and right hands operate in the same direction with different amplitudes, the control instruction is a turning instruction;

[0015] When the left and right hands operate in opposite directions with the same amplitude, the control instruction is a zero turn instruction.

[0016] As a further improvement of the present invention, the pair of operating parts each have a thumb slot, and the operator can put a finger into the thumb slot and move the thumb slot to perform clockwise or counterclockwise operation; the pair of operating parts also each have an elastic component, and the elastic component is used to reset the thumb slot to an initial position.

[0017] As a further improvement of the present invention, the thumb slot can rotate around the pair of operating parts and generate angular displacement, and the rotation angle of the thumb slot compared to the initial position is -30° to 30°.

[0018] As a further improvement of the present invention, the support portion includes a first grip portion and a second grip portion, and the thumb slot is arranged on the first grip portion and the second grip portion in a mirror-symmetrical manner.

[0019] As a further improvement of the present invention, the support portion is an integral component, the first grip portion and the second grip portion are horizontally inclined and mirror-symmetrically arranged, and the angle between the first grip portion and the second grip portion at the connection is an obtuse angle.

[0020] As a further improvement of the present invention, the support portion is provided as a split body, the first gripping portion and the second gripping portion are vertically inclined and mirror-symmetrically provided, and the first gripping portion and the second gripping portion are in an n-shape.

[0021] As a further improvement of the present invention, the pair of operating parts are arranged at two ends of the supporting part.

[0022] As a further improvement of the present invention, it further includes a pair of safety switches, which are used to control the on / off of the electromagnetic brake of the lawn mower and are respectively physically and electrically connected to the pair of operation parts, so that the operator needs to press the pair of safety switches first before operating the pair of operation parts, thereby controlling the lawn mower to complete corresponding actions.

[0023] To achieve the above object, the present invention also provides a method for controlling the steering of a lawn mower, which is applied to the lawn mower as described above and mainly includes the following steps:

[0024] S1. When both the left and right hands operate the steering control mechanism clockwise with the same amplitude, the control instruction is forward; when both the left and right hands operate the steering control mechanism counterclockwise with the same amplitude, the control instruction is backward;

[0025] S2. When the left hand operates the steering control mechanism clockwise or counterclockwise, and the right hand operates in any direction with an operation amplitude smaller than that of the left hand, the control instructions are respectively the front right turn instruction or the rear right turn instruction; when the right hand operates the steering control mechanism clockwise or counterclockwise, and the left hand operates in any direction with an operation amplitude smaller than that of the right hand, the control instructions are respectively the front left turn instruction or the rear left turn instruction;

[0026] S3. When the left hand operates the steering control mechanism clockwise and the right hand operates counterclockwise with the same amplitude, the control instruction is the zero turn instruction; when the right hand operates the steering control mechanism clockwise and the left hand operates counterclockwise with the same amplitude, the control instruction is the zero turn instruction.

[0027] The beneficial effects of the present invention are as follows: The structure of the present invention is simple, and only small-amplitude actions of the hands are required to control the forward / backward movement, turning, and zero turn of the lawn mower, effectively maintaining the stability and balance of the human body center of gravity, making the control more convenient and safe. Description of the Drawings

[0028] Figure 1 It is a structural diagram of the steering control mechanism of the first embodiment of the present invention applied to a lawn mower.

[0029] Figure 2 It is a cross-sectional structural diagram of the steering control mechanism in the present invention.

[0030] Figure 3 It is an exploded structural schematic diagram of the steering control mechanism in the present invention.

[0031] Figure 4 It is a structural diagram of the first holding part in the present invention.

[0032] Figure 5 It is Figure 4 a relationship diagram of the rotation angle of the thumb slot in and the voltage value output by the detection part.

[0033] Figure 6 is Figure 5 The corresponding relationship diagram between the voltage value output by the detection component and the rotational speed output value of the controller in

[0034] Figure 7 It is the circuit structure diagram of the controller and other devices in the present invention.

[0035] Figure 8 It is the exploded structure schematic diagram of the steering control mechanism in the second embodiment of the present invention.

[0036] Figure 9 It is the structure schematic diagram of the steering control mechanism in the third embodiment of the present invention. Detailed implementation manners

[0037] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] The present invention discloses a steering control mechanism 100 applied to a gardening tool. The gardening tool can be a lawn mower or other types of gardening tools, which will not be described in detail here and are not subject to any restrictions. For the sake of clear description, in the following part of the specification, the steering control mechanism 100 applied to a lawn mower will be taken as an example to describe the specific structure of the steering control mechanism 100 in detail.

[0039] As Figure 1 shown, the lawn mower includes a main body part 30, an operation panel 40 and a pedal 50. The main body part 30 includes traveling wheels 31 and a motor (not shown), and the motor is used to drive the traveling wheels 31 to travel. Specifically, a differential is provided in the lawn mower and is connected to the motor to enable the traveling wheels 31 on both sides to roll at different rotational speeds. Of course, the traveling wheels 31 can also be of other structures, including but not limited to forms such as in-wheel motors, and are not restricted here.

[0040] The operation panel 40 and the pedal 50 are arranged at the rear end of the main body part 30 of the lawn mower. The steering control mechanism 100 is arranged on the operation panel 40 and is electrically connected to the controller (not shown) of the lawn mower, facilitating an operator to operate while standing on the pedal 50.

[0041] As Figure 2 and Figure 3As shown, the steering control mechanism 100 includes a support portion 10 for the user to hold with both hands. The support portion 10 includes a first holding portion 11 and a second holding portion 12. The first holding portion 11 and the second holding portion 12 are respectively arranged on the left and right sides of the operation panel 40, and the first holding portion 11 and the second holding portion 12 are preferably mirror-symmetrical. Specifically, the support portion 10 is fixedly installed on the operation panel 40 through a locking mechanism 13, and both ends of the support portion 10 are connected to the locking mechanism 13. In this embodiment, the first holding portion 11 and the second holding portion 12 are horizontally inclined, which is convenient for the operator to hold the first holding portion 11 and the second holding portion 12 horizontally with the left hand and the right hand respectively to maintain the balance of the operator during the shaking of the lawn mower. Such a setting is more in line with ergonomics.

[0042] In an embodiment of the present invention, the first holding portion 11 and the second holding portion 12 may be fixedly connected, that is, the first holding portion 11 and the second holding portion 12 may be an integral member. The included angle formed at the connection of the first holding portion 11 and the second holding portion 12 is an obtuse angle, so that the first holding portion 11 and the second holding portion 12 are integrally in an inverted V shape, which is convenient for both hands to hold. Specifically, the first holding portion 11 and the second holding portion 12 may be in the form of support rods or the like, which can be selected according to actual needs and are not limited herein.

[0043] Specifically, the length of the first holding portion 11 and the second holding portion 12 for the hand-held part is set to N1, and the length of the first holding portion 11 and the second holding portion 12 in the horizontal direction is set to N2, where N1 is greater than or equal to 140 mm, and N2 is between 225 and 450 mm. According to experience, the width of the fingers of an average person except the thumb is L1, the distance from the tiger's mouth to the tip of the thumb is L2, and the distance between the outer edges of the fingers when the hands are stretched straight forward, that is, the shoulder width of an adult is L3, where L1 is between 80 and 100 mm, L2 is between 60 and 75 mm, and L3 is about 450 mm. The length of the first holding portion 11 and the second holding portion 12 for the hand-held part is the finger grasping range, that is, N1≥L1 + L2, N1≥140 mm. When the length of the first holding portion 11 and the second holding portion 12 in the horizontal direction is greater than the shoulder width of the human body, it will make the operation inconvenient. At this time, 0.5L3≤N2≤L3 should be satisfied, that is, N2 is between 225 and 450 mm.

[0044] An operation portion 20 fixed to the support portion 10 is further provided on the support portion 10. The operation portion 20 is configured to be operable when the operator holds the support portion 10 to adjust the rotation speed of the motor and achieve steering.

[0045] Specifically, there are a pair of operation parts 20, which are respectively arranged on the first holding part 11 and the second holding part 12 and are arranged in mirror symmetry. The pair of operation parts 20 are used to generate operation signals according to the displacement generated by the operation of the operator's hand. The pair of operation parts 20 are used to control the driving of the lawn mower. When the operator holds the first holding part 11 and the second holding part 12 with both hands, the pair of operation parts 20 can be operated by fingers, without the need to operate by the forward and backward movement of the arm, avoiding problems such as unstable center of gravity caused during the operation.

[0046] Further, each of the pair of operation parts 20 has a thumb slot 23. The operator can put a finger into the thumb slot 23 and move the thumb slot 23 to perform clockwise or counterclockwise operations. The finger can be the thumb, and the front and back swing of the thumb enables the detection part 21 described below to output a voltage signal.

[0047] As Figure 4 shown, specifically, the distance from the thumb slot 23 to the finger grip center of the support part 10 (i.e., the height of the thumb slot 23) is N3. In the embodiment of the present invention, the height N3 of the thumb slot 23 is set to 50 - 70 mm. Since the length of the thumb is limited, the angle α by which the thumb slot 23 can rotate around the pair of operation parts 20 controlled by the thumb is also limited. In the present invention, the rotation angle α is set to -30° to 30°.

[0048] Both of the pair of operation parts 20 are also provided with elastic components 24. One end of the elastic component 24 is connected to the thumb slot 23, and the other end is arranged on the support part 10. The elastic component 24 is used to reset the thumb slot 23 to the initial position, facilitating the controller to accurately achieve parking braking. In the present invention, the elastic component 24 can be a structure such as a return spring or a torsion spring, and the specific setting form can be selected according to actual needs and is not limited herein.

[0049] Further, each of the pair of operation parts is respectively provided with a detection member 21 and a connector 22 electrically connected to the detection member 21. The detection member 21 is used to issue an operation signal according to the displacement generated by the operation of the operator's hand. The controller is electrically connected to the operation part 20 through the connector 22, so as to issue a control instruction to the lawn mower according to the operation signal issued by the detection member 21. In this embodiment, the detection member 21 is a potentiometer-type sensor, which can generate different displacements according to the amplitude of the hand operation and output corresponding voltage values to output voltage signals. The displacement includes linear displacement and / or angular displacement. In the present invention, angular displacement can be generated through the thumb slot 23, that is, the pair of operation parts 20 can generate angular displacement through the detection member 21 with their own operation states and convert them into corresponding voltage values, and issue operation signals to the controller, so that the controller can issue control instructions according to the corresponding voltage values to control the forward / backward movement, turning or zero-turning of the lawn mower, and control the speed of the lawn mower according to the amplitude of the specific angular displacement. Of course, in other embodiments, the detection member 21 can also be other devices for detecting hand operations, including but not limited to displacement sensors, optical sensors or pressure sensors, etc., which are not limited here.

[0050] Specifically, the hand operation of the operator includes the same-direction operation of the pair of operation parts 20 by the left and right hands and the opposite-direction operation of the pair of operation parts 20 by the left and right hands. The same-direction operation includes clockwise operation from the initial position to the front-end position and counterclockwise operation from the initial position to the rear-end position; the opposite-direction operation includes the left hand operating counterclockwise while the right hand operates clockwise, and the left hand operating clockwise while the right hand operates counterclockwise.

[0051] Furthermore, the operation part 20 includes a fixed part 211 and a rotating part 212. Among them, the fixed part 211 is fixed on the support part 10, and the rotating part 212 can rotate relative to the fixed part 211. The detection member 21 is used to detect the angle of rotation of the rotating part 212 relative to the fixed part 211. Specifically, the rotating part 212 can rotate bidirectionally relative to the fixed part 211. The thumb slot 23 is arranged on the rotating part 212 and drives the rotating part 212 to rotate synchronously, which is convenient for operation by fingers. The fixed part 211 is provided with a first position, a second position and a third position. Among them, the second position is the initial position of the rotating part 212 and the second position is located between the first position and the third position. The third position is the maximum position of the rotation of the rotating part 212, and the first position is the maximum position of the reverse rotation of the rotating part 212. When the rotating part 212 is located at the first position, the voltage value output by the detection member 21 is the smallest; when the rotating part 212 is located at the third position, the voltage value output by the detection member 21 is the largest.

[0052] Such as Figure 5 and Figure 6As shown, in a preferred embodiment of the present invention, the voltage value range output by the detection member 21 can be set to 0 - 5V. That is, when the rotating part 212 is in the first position, the voltage value output by the detection member 21 is 0V, and when the rotating part 212 is in the third position, the voltage value output by the detection member 21 is 5V. Correspondingly, the rotation angle α of the rotating part 212 is set to -20° - 20°. The voltage value range output by the detection member 21 is positively linearly correlated with the rotation angle α. That is, when the rotation angles α of the pair of operating parts 20 are -20°, 0°, and 20° respectively, they correspond to the rear end position, the initial position, and the front end position, and the voltage values output by the detection member 21 are 0V, 2.5V, and 5V respectively. In other words, when the pair of operating parts 20 rotate clockwise, a high voltage signal can be output, and when they rotate counterclockwise, a low voltage signal can be output.

[0053] In a specific embodiment of the present invention, when the pair of operating parts 20 both rotate clockwise to output a high voltage signal, the controller sends a control instruction to the lawn mower to drive the left tire and the right tire forward respectively; when the pair of operating parts 20 both rotate counterclockwise to output a low voltage signal, the controller sends a control instruction to the lawn mower to drive the left tire and the right tire backward respectively.

[0054] Furthermore, when the left and right hands operate in the same direction with the same amplitude, the control instruction is a forward / backward instruction; when the left and right hands operate in the same direction with different amplitudes, the control instruction is a turning instruction; when the left and right hands operate in opposite directions with the same amplitude, the control instruction is a zero-turn instruction.

[0055] Correspondingly, the rotational speed output of the controller of the lawn mower, that is, the forward or backward speed of the left and right tires, depends on the specific voltage value output by the detection member 21. When the voltage value range output by the detection member 21 is in (2.5, 5], as the voltage value increases, the rotational speed output of the controller increases, and the corresponding rotational speed output range of the controller is 0 - 100%; when the voltage value range output by the detection member 21 is in [0, 2.5), as the voltage value decreases, the rotational speed output of the controller increases in the reverse direction, and the corresponding rotational speed output range of the controller is 0 - -100%. That is to say, the voltage value range (2.5, 5] is the forward interval, and the voltage value range [0, 2.5) is the backward interval. When the voltage value output by the detection member 21 is around 2.5V, the pair of operating parts 20 are in the initial position, and the rotational speed output of the controller is 0, in the middle interval. The specific range of the middle interval can be set as needed. Of course, the range of the middle interval cannot be set too small to facilitate the operator's operation.

[0056] Such as Figure 4 and Figure 7As shown, the pair of operating parts 20 is also provided with safety switches 25. The safety switches 25 can be used to control the on / off of the electromagnetic brake of the gardening tool, and are physically and electrically connected to the pair of operating parts 20 respectively, so that the operator needs to press the pair of safety switches 25 first before operating the pair of operating parts 20, thereby controlling the corresponding actions completed by the gardening tool. The pair of operating parts 20 is in a locked state before the safety switches 25 are triggered and does not respond to any operations. Only after the safety switches 25 are triggered, that is, when the operator starts the safety switches 25 in a state of ensuring operation safety, can the pair of operating parts 20 be operated and used. The purpose is to achieve "double-action" operation and effectively avoid misoperation.

[0057] As Figure 8 shown, in the second embodiment of the present invention, the present invention also provides a steering control mechanism 200, including a support part 10. The support part 10 includes a first holding part 11 and a second holding part 12 which are integrally arranged. Among them, the first holding part 11 and the second holding part 12 are horizontally inclined and mirror-symmetrically arranged, and the included angle between the first holding part 11 and the second holding part 12 at the connection is an obtuse angle. A pair of operating parts 20 are also provided on both the first holding part 11 and the second holding part 12. Among them, the structures of the first holding part 11 and the second holding part 12 are the same as those of the steering control mechanism 100 in the above-mentioned first embodiment, and the pair of operating parts 20 are speed control knobs. The speed control knobs 20 are arranged at both ends of the support part 10 and include the Figure 3 detection part 21, elastic component 24 and safety switch 25 in the first embodiment as shown. Since the structures of the detection part 21, elastic component 24 and safety switch 25 are the same as those in the first embodiment, they will not be elaborated here. The speed control knobs are respectively arranged on the first holding part 11 and the second holding part 12, and the two speed control knobs 20 are mirror-symmetric. In this embodiment, the rotation angle of the speed control knob 20 is preferably set to -20° to 20°. The operator can control the forward or backward movement of the corresponding tire by rotating the speed control knob clockwise or counterclockwise.

[0058] As Figure 9As shown, in the third embodiment of the present invention, the present invention further provides a steering control mechanism 300, including a support portion 10, and the support portion 10 includes a first grip portion 11 and a second grip portion 12 which are separately arranged. Among them, the first grip portion 11 and the second grip portion 12 are inclined in the vertical direction and are preferably mirror-symmetrically arranged, and the first grip portion 11 and the second grip portion 12 are in an "n" shape, which is convenient for the operator to vertically hold the first grip portion 11 and the second grip portion 12 with the left hand and the right hand respectively to maintain the balance of the operator during the shaking of the lawn mower. At this time, the lengths of the first grip portion 11 and the second grip portion 12 for the hand-held part are still set to N1, and the lengths of the first grip portion 11 and the second grip portion 12 in the horizontal direction are still set to N2, where N1 is greater than or equal to 140 mm, and N2 is between 225 and 450 mm.

[0059] The present invention also discloses a control method for a lawn mower having a steering control mechanism 100, which mainly includes the following steps:

[0060] S1. When both the left hand and the right hand operate the steering control mechanism clockwise with the same amplitude, the lawn mower is in the forward state;

[0061] When both the left hand and the right hand operate the steering control mechanism counterclockwise with the same amplitude, the lawn mower is in the reverse state;

[0062] S2. When the left hand operates the steering control mechanism clockwise or counterclockwise, and the right hand operates in any direction with an operation amplitude smaller than that of the left hand, at this time, the turning center is on the right side, and the lawn mower is in the front right turn or rear right turn state;

[0063] When the right hand operates the steering control mechanism clockwise or counterclockwise, and the left hand operates in any direction with an operation amplitude smaller than that of the right hand, at this time, the turning center is on the left side, and the lawn mower is in the front left turn or rear left turn state;

[0064] S3. When the left hand operates the steering control mechanism clockwise and the right hand operates counterclockwise with the same amplitude, the lawn mower is in the right zero-turn state;

[0065] When the right hand operates the steering control mechanism clockwise and the left hand operates counterclockwise with the same amplitude, the lawn mower is in the left zero-turn state.

[0066] In summary, the structure of the present invention is simple, and only small-amplitude actions of the hands are required to control the forward / backward movement, turning, and zero-turn of the gardening tool, effectively maintaining the stability and balance of the human body center of gravity, making the control more convenient and safe.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A lawn mower, characterized in that, include: A main body, the main body comprising a walking wheel and a motor, the motor driving the walking wheel to walk; An operation panel is arranged at the rear end of the main body; A support portion, the support portion is connected to the operation panel of the main body portion and is for the operator to hold with both hands; An operating part, used for adjusting the speed and / or direction of the motor, the operating part is connected to the support part, and the operating part is configured to be operable when an operator holds the support part; A controller, electrically connected to the operating unit, for issuing control instructions to the lawn mower; The operating part is provided with a pair, each of which has a thumb slot and a detection member, wherein the thumb slot is used for an operator to insert a finger into and move the thumb slot to perform clockwise or counterclockwise operation; the detection member is used to send an operation signal according to the displacement generated by the operator's hand operation, and the controller sends a control instruction to the lawn mower according to the operation signal, and the control instruction includes a forward / backward instruction, a turning instruction and a zero turn instruction.

2. The lawn mower according to claim 1, wherein: The pair of operating parts also respectively have connectors electrically connected to the detection element.

3. The lawn mower according to claim 2, wherein: The detection element is a potentiometer sensor, which can generate different displacements according to the amplitude of hand operation and output corresponding voltage values, and the displacement includes linear displacement and / or angular displacement.

4. The lawn mower according to claim 3, characterized in that: The controller establishes an electrical connection with the operating part through the connector, and sends a control instruction to the lawn mower according to the operating signal sent by the detection component.

5. The lawn mower according to claim 4, characterized in that: The operator's hand operation includes left and right hands operating the pair of operating parts in the same direction and left and right hands operating the pair of operating parts in opposite directions.

6. The lawn mower according to claim 5, characterized in that: The same-direction operation includes a clockwise operation from the initial position to the front position and a counterclockwise operation from the initial position to the rear position; The opposite direction operation includes operating the left hand in a counterclockwise direction while the right hand operates in a clockwise direction, and operating the left hand in a clockwise direction while the right hand operates in a counterclockwise direction.

7. The lawn mower according to claim 6, characterized in that: When the left and right hands operate in the same direction and with the same amplitude, the control instruction is a forward / backward instruction; When the left and right hands operate in the same direction with different amplitudes, the control instruction is a turning instruction; When the left and right hands operate in opposite directions with the same amplitude, the control instruction is a zero turn instruction.

8. The lawn mower according to claim 7, wherein: The pair of operating parts also each have an elastic component, and the elastic component is used to reset the thumb slot to an initial position.

9. The lawn mower according to claim 8, characterized in that: The thumb slot can rotate around the pair of operating parts and generate angular displacement, and the rotation angle of the thumb slot compared to the initial position is -30° to 30°.

10. The lawn mower according to claim 9, characterized in that: The support portion includes a first grip portion and a second grip portion, and the thumb slot is arranged on the first grip portion and the second grip portion in a mirror-symmetrical manner.

11. The lawn mower according to claim 10, characterized in that: The support portion is an integral component, the first grip portion and the second grip portion are horizontally inclined and mirror-symmetrically arranged, and the angle between the first grip portion and the second grip portion at the connection is an obtuse angle.

12. The lawn mower according to claim 10, characterized in that: The support portion is disposed separately, the first gripping portion and the second gripping portion are vertically inclined and mirror-symmetrically disposed, and the first gripping portion and the second gripping portion are in an N-shape.

13. The lawn mower according to claim 7, characterized in that: The pair of operating parts are provided at both ends of the supporting part.

14. The lawn mower according to any one of claims 1-13, characterized in that: It further includes a pair of safety switches, which are used to control the on / off of the electromagnetic brake of the lawn mower and are physically and electrically connected to the pair of operation parts respectively, so that the operator needs to press the pair of safety switches first before operating the pair of operation parts, thereby controlling the lawn mower to complete corresponding actions.

15. A method for steering control of a lawn mower, characterized in that, Applying the lawn mower according to any one of claims 1-13, mainly includes the following steps: S1. When both the left and right hands operate the steering control mechanism clockwise with the same amplitude, the control instruction is forward; when both the left and right hands operate the steering control mechanism counterclockwise with the same amplitude, the control instruction is backward. S2. When the left hand operates the steering control mechanism clockwise or counterclockwise, and the right hand operates in any direction with an operation amplitude smaller than that of the left hand, the control instructions are the front right turn instruction or the rear right turn instruction respectively; when the right hand operates the steering control mechanism clockwise or counterclockwise, and the left hand operates in any direction with an operation amplitude smaller than that of the right hand, the control instructions are the front left turn instruction or the rear left turn instruction respectively. S3. When the left hand operates the steering control mechanism clockwise and the right hand operates counterclockwise with the same amplitude, the control instruction is the zero turn instruction; when the right hand operates the steering control mechanism clockwise and the left hand operates counterclockwise with the same amplitude, the control instruction is the zero turn instruction.

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