Hand-push type working machine and mower

Abstract

The invention discloses a hand-push type working machine and a mower, and the hand-push type mower comprises a main machine which at least comprises a walking assembly, a walking motor for driving the walking assembly, a cutting assembly and a cutting motor for driving the cutting assembly; the handle device is connected to the host and at least comprises an operation piece for a user to operate; the controller is configured to at least control the working states of the walking motor and the cutting motor; the power interface is used for accessing electric energy which can at least supply power to the walking motor and the cutting motor; wherein the walking motor can be driven by external force and generate power generation electric energy; the controller is configured to disconnect an electric energy transmission path of the walking motor when the walking motor generates power generation electric energy.

Description

Technical Field

[0001] The present disclosure relates to a gardening tool, for example, a hand-push working machine and a lawn mower. Background Art

[0002] Self-propelled garden tools, such as push-type lawn mowers and snow blowers, are generally equipped with operating parts on the handles for users to operate the running status of the machine's travel motor and working motor. Among them, the travel motor will generate electricity under the action of external force. For example, after the work is completed, when the user drags the lawn mower backwards when the host is powered off, the travel motor reverses to generate electricity; or during normal work, the user drags the lawn mower backwards to reverse the travel motor to generate electricity, or in other states, when the lawn mower is pushed forward, the travel motor can also generate electricity. The generated electricity is easy to discharge in reverse to the control board, which may cause some abnormal conditions of the machine or even damage the machine.

[0003] This section provides background information related to the present application which is not necessarily prior art. Summary of the invention

[0004] One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, one object of the present application is to provide a safer push lawn mower.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions: A hand-push lawn mower comprises: a main body, comprising at least a walking component and a walking motor for driving the walking component, and a cutting component and a cutting motor for driving the cutting component; a handle device, connected to the main body, comprising at least an operating member for user operation; a controller, configured to at least control the working states of the walking motor and the cutting motor; a power interface, for receiving electric energy that can at least power the walking motor and the cutting motor; wherein the walking motor can be driven by an external force and generate generated electric energy; and the controller is configured to disconnect the electric energy transmission path of the walking motor when the walking motor generates the generated electric energy.

[0006] In one embodiment, the push lawn mower further includes: a circuit switch for controlling the on and off of the power supply circuit of the travel motor.

[0007] In one embodiment, the controller is further configured to: control the circuit switch to disconnect the power supply circuit when the walking motor is driven by external force; and control the circuit switch to turn on the power supply circuit when the walking motor is driven by the electric energy connected to the power interface.

[0008] In one embodiment, the loop switch comprises a relay.

[0009] In one embodiment, the loop switch comprises a normally open relay.

[0010] In one embodiment, the relay is at least a two-phase relay.

[0011] In one embodiment, the loop switch comprises a thyristor.

[0012] In one embodiment, the travel motor comprises a hub motor.

[0013] In one embodiment, the push lawn mower moves under the positive push or reverse pull of an external force, and the travel motor can generate power.

[0014] A hand-propelled working machine comprises: a main machine, comprising at least a walking component and a walking motor for driving the walking component, and a cutting component and a cutting motor for driving the cutting component; a handle device, connected to the main machine, comprising at least an operating member for user operation; a controller, configured to at least control the working states of the walking motor and the cutting motor; a power supply interface, for receiving electric energy that can at least power the walking motor and the cutting motor; wherein the walking motor can be driven by an external force and generate generated electric energy; and the controller is configured to: when the walking motor generates the generated electric energy, control the generated electric energy to at least not power the cutting motor.

[0015] In one embodiment, the controller is further configured to: when the power interface is connected to a battery pack, control the generated electrical energy to charge the battery pack.

[0016] In one embodiment, the push-type working machine further includes: an indicator light; and the controller is further configured to control the generated electrical energy to power the indicator light.

[0017] In one embodiment, the push-type working machine further includes: a UI end; the controller is further configured to control the generated electric energy to supply power to the UI end.

[0018] In one embodiment, the walk-behind working machine further includes: an energy storage element; and the controller is further configured to control the generated electric energy to be stored in the energy storage element.

[0019] In one embodiment, the hand-push working machine further includes: a circuit switch for controlling the on-off of the power supply circuit of the travel motor.

[0020] In one embodiment, the controller is further configured to: control the circuit switch to disconnect the power supply circuit when the walking motor is driven by external force; and control the circuit switch to turn on the power supply circuit when the walking motor is driven by the electric energy connected to the power interface.

[0021] In one embodiment, the loop switch comprises a relay.

[0022] A hand-propelled working machine comprises: a main machine, comprising at least a walking component and a walking motor for driving the walking component, and a cutting component and a cutting motor for driving the cutting component; a first drive circuit, configured to drive the walking motor; a second drive circuit, configured to drive the cutting motor; a handle device, connected to the main machine, comprising at least an operating member for user operation; a controller, configured to at least control the working states of the walking motor and the cutting motor; a power supply interface, for receiving electric energy that can at least power the walking motor and the cutting motor; wherein the walking motor can be driven by an external force and generate generated electric energy; and the controller is configured to: when the walking motor generates the generated electric energy, control the second drive circuit to change the conduction state to short-circuit the stator winding of the cutting motor.

[0023] In one embodiment, the push-type working machine further includes: an indicator light; and the controller is further configured to control the generated electrical energy to power the indicator light.

[0024] In one embodiment, the push-type working machine further includes: a UI end; the controller is further configured to control the generated electric energy to supply power to the UI end. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 is a structural diagram of a lawn mower provided in an embodiment of the present application; Figure 2 yes Figure 1 The control circuit diagram of the lawn mower in FIG. Figure 3 Schematic diagram of a control circuit of a lawn mower in one embodiment of the present application. DETAILED DESCRIPTION

[0027] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0028] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0029] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0030] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0031] In this application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, etc. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0032] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0033] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0034] In this application, the terms "controller", "processor", "central processing unit", "CPU", and "MCU" are interchangeable. When a unit "controller", "processor", "central processing unit", "CPU", or "MCU" is used to perform a specific function, unless otherwise specified, these functions can be performed by a single unit or multiple units.

[0035] In the present application, the terms “device”, “module” or “unit” may be implemented in the form of hardware or software to achieve specific functions.

[0036] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0037] In addition to lawn mowers, the hand-pushed working machine in the present application may also include a hand-pushed snow blower, a hand-pushed warehouse trailer, a picnic car, a trolley, or a self-propelled electric device. The following description takes a hand-pushed lawn mower that can be operated by a user at the rear side of the hand-pushed device as an example.

[0038] Reference Figure 1The lawn mower 100 shown mainly includes a handle device 11, a connecting rod 111, an operating member 112, an operating switch 112a, a main unit 12, and a travel assembly 121. The main unit 12 includes a travel assembly 121 and a power mechanism (not shown). Optionally, the handle device 11 includes a connecting rod 111 and an operating member 112 that can be held. The operating member 112 at least includes a grip for the user to hold and a self-propelled operating trigger 112a; the connecting rod 111 is a hollow long rod structure, and the connecting rod 111 connects the operating member 112 and the main unit 12. The travel assembly 121 is installed on the main unit 12, and the travel assembly 121 can rotate around a rotation axis so that the entire lawn mower 100 can move on the ground. In this embodiment, the travel assembly 121 includes a travel wheel 1211 of the lawn mower 100 and a power mechanism that drives the travel wheel 1211 to travel.

[0039] In this embodiment, the lawn mower 100 has a self-propelled control function, and the power mechanism can drive the walking component 121 to rotate, thereby driving the lawn mower 100 to move on the ground, so that the user does not need to manually push the lawn mower 100 to move and cut grass. The power mechanism can specifically be a walking motor, and the walking motor can output a driving force to drive the walking component 121 to rotate. In some embodiments, a mowing operation trigger 112b is also integrated on the handle device 11 of the lawn mower 100. Exemplarily, the mowing operation trigger 112b and the self-propelled operation trigger 112a of the lawn mower 100 are both integrated on the operating member 112. In addition, the operating switch 112a is not limited to a physical switch or a signal switch, and any device that can control the opening and closing of the current in the circuit is applicable. In fact, the above-mentioned self-propelled operation trigger 112a and / or the mowing operation trigger 112b are not limited to the control of the current, and can also be a mechanical means to control the opening or closing of the self-propelled function.

[0040] The host 12 or the handle device 11 may be provided with a main control board 200, and the control circuit 2000 on the main control board 200 can at least control the walking and / or mowing of the lawn mower 100. Figure 2 As shown, the control circuit 2000 may at least include a power interface 20 , a controller 21 , a first drive circuit 22 , a travel motor 23 , a second drive circuit 24 , and a cutting motor 25 .

[0041] Among them, the power interface 20 can be connected to a DC power supply or an AC power supply. The control circuit 2000 may include a circuit capable of converting the connected power supply. For example, the control circuit 2000 may include a rectifier circuit, a filter circuit, or a voltage conversion circuit, etc., which can rectify, filter, or increase / decrease the voltage of the power supply line connected to the power interface 20. It can be understood that the lawn mower 100 may include two or more power interfaces of the same but different types. For example, the lawn mower 100 may include two DC power interfaces, which can be connected to at least two battery packs. In this embodiment, the power interface 20 is used to connect a battery pack 300 for an electric tool. That is, the battery pack 300 can power the lawn mower 100, and can also power a variety of different types of electric tools. Exemplarily, the rated voltage of the battery pack 300 is greater than or equal to 40V, or greater than or equal to 36V, or greater than or equal to 50V, etc. This embodiment does not specifically limit the appearance structure of the battery pack 300.

[0042] In some embodiments, the power tool that can be powered by the battery pack 300 can be a handheld power tool, such as a drill, a pruning machine, a sander, etc. Alternatively, it can also be a bench-type tool, such as a table saw, a miter saw, etc. Alternatively, it can also be a riding power tool, such as a riding lawn mower, a riding vehicle, an all-terrain vehicle, etc. Alternatively, it can also be a robot tool, such as a lawn mowing robot, a snow-clearing robot, etc. In some embodiments, the power tool can also be an electric drill, an electric light, an electric car, etc. In some embodiments, the power tool can also be a garden tool, such as a pruning machine, a hair dryer, a chain saw, etc. Alternatively, the power tool can also be a decoration tool, such as a screwdriver, a nail gun, a circular saw, a sander, etc. In some embodiments, the power tool can also be a vegetation care tool, such as a lawn mower, a pruning machine, a chain saw, etc. Alternatively, the power tool can also be a cleaning tool, such as a hair dryer, a snow sweeper, a cleaning machine, etc. Alternatively, the power tool can also be a drill tool, such as a drill, a screwdriver, a wrench, an electric hammer, etc. Alternatively, the power tool can also be a saw tool, such as a reciprocating saw, a jig saw, a circular saw, etc. Alternatively, the electric tool may be a bench tool, such as a bench saw, a miter saw, a metal cutter, a router, etc. Alternatively, the electric tool may be a grinding tool, such as an angle grinder, a sander, etc. Alternatively, the electric tool may be other tools, such as a lamp, a fan, etc.

[0043] The first drive circuit 22 is connected between the controller 21 and the travel motor 23, and is used to drive the travel motor 23. In one embodiment, the first drive circuit 22 is electrically connected to each phase stator winding of the travel motor 23, and is used to transfer the power supply current to the stator winding to drive the travel motor 23 to rotate. Figure 2As shown, the first drive circuit 22 includes a plurality of switch elements Q1, Q2, Q3, Q4, Q5, and Q6. Each gate terminal of the switch element is electrically connected to the controller 21 for receiving a control signal from the controller 21. Each drain or source of the switch element is connected to the stator winding of the travel motor 23. The switch elements Q1-Q6 receive control signals from the controller 21 to change their respective conduction states, thereby changing the current loaded by the power supply on the stator winding of the travel motor 23. In one embodiment, the switch elements Q1-Q6 in the first drive circuit 22 can be a three-phase bridge driver circuit including six controllable semiconductor power devices (such as FET, BJT, IGBT, etc.), or any other type of solid-state switch, such as IGBT, BJT, etc.

[0044] The second driving circuit 24 is connected between the controller 21 and the cutting motor 25 to drive the cutting motor 25. The circuit structure and driving mode of the second driving circuit 24 can refer to the circuit structure and driving mode of the first driving circuit 22, which will not be described here.

[0045] The controller 21 can at least detect the operation signal generated after the handle device 11 is operated by the user, and then control the travel motor 23 and / or the cutting motor 25 to operate according to the detected operation signal. Exemplarily, after the user operates the handle device 11 to turn on, the travel motor 23 and / or the cutting motor 25 are powered on, and the controller 21 detects the thrust signal transmitted from the handle device 11, and then controls the travel motor 23 to perform operations such as moving forward, turning, decelerating, or accelerating, or detects a mowing signal, and can control the cutting motor 25 to operate so that the cutting blade cuts the vegetation.

[0046] After the lawn mower 100 has finished its work, it may be dragged by the user to move backward, or the lawn mower needs to be pushed backward for a distance according to the design of the mowing path before moving forward to mow again, that is, the lawn mower 100 may be forced to move backward by external force. In this case, the travel motor 23 is forced to drive by external force (i.e., the force applied by the user to the handle device 11), rather than being controlled and driven by the controller 21. Driven by external force, the rotation of the travel motor 23 will generate generated electricity. At this time, the travel motor 23 can be understood as a generator, which can generate electricity by rotation. In other embodiments, when the lawn mower 100 is driven forward and backward by external force, the travel motor 23 may generate generated electricity. For example, the travel motor 23 is a hub motor. Even if the lawn mower 100 is driven forward by external force, the travel motor 23 can generate generated electricity.

[0047] In some embodiments, when the power interface 20 is not connected to the battery pack 300, the travel motor 23 can be dragged by an external force to generate power. In some embodiments, when the power interface 20 is connected to the battery pack 300, the travel motor 23 can be dragged by an external force and can also generate power. In other words, whether the power interface 20 is connected to the battery pack 300 does not affect the travel motor 23 generating power.

[0048] It should be noted that the generated electric energy generated by the travel motor 23 may be fed back to the main control board 200, so that the controller 21 on the main control board 200 may control other functional accessories in the lawn mower 100 after being powered on, for example, it may light up the indicator light or the display screen, etc., and may also control the rotation of the cutting motor 25. In particular, the main control board 200 may also power on the cutting motor 25 so that it is driven by the unexpected generated electric energy, thereby posing certain safety hazards, such as causing personal safety accidents or damaging equipment.

[0049] The solution provided by the embodiments of the present application can at least reduce or avoid the occurrence of the above situation.

[0050] In one embodiment, when the controller 21 detects the generated electric energy fed back by the travel motor 23, it can at least control the electric energy not to be transmitted to the cutting motor 25. There are many ways to control the generated electric energy not to be transmitted to the cutting motor 25, such as cutting off the electric energy transmission path, or transmitting it to other functional modules, or storing it for backup, etc. It should be noted that the controller 21 can determine whether the electric energy in the control circuit 200 is generated electric energy by detecting the magnitude or direction of the current, or the controller 21 detects the electric energy transmitted by the control circuit 2000 when it detects that the power interface 20 is not connected to the battery pack 300, which can be considered as the generated electric energy generated by the travel motor 23.

[0051] In one implementation, reference Figure 3 A loop switch 26 is provided on the connection path between the travel motor 23 and the first drive circuit 22, and the loop switch 26 is at least electrically connected to the controller 21. That is, the loop switch 26 is provided on the power supply loop 231 of the travel motor 23, and the loop can be a bidirectional transmission path of current, that is, the power supply input from the power interface 20 side can be transmitted to the travel motor 23 through the power supply loop 231, and similarly, the power generated by the travel motor 23 driven by an external force can also be transmitted in reverse to the power interface 20 side, or to the main control board 200, or to other functional modules, such as indicator lights or UI terminals, through the power supply loop 231.

[0052] In this embodiment, the controller 21 can control the on and off of the circuit switch 26 according to whether the travel motor 23 generates generated electric energy. During the normal operation of the lawn mower 100, that is, when the power supply connected to the power interface 20 can supply power to the travel motor 23, and the controller 21 can output a control signal to control the rotation of the travel motor 23, the controller 21 controls the circuit switch 26 to be turned on, so that the power supply circuit 231 is normally turned on. When the controller 21 detects that the travel motor 23 generates generated electric energy, it can control the circuit switch 26 to be turned off, so that the power supply circuit 231 of the travel motor 23 is disconnected, and the generated electric energy generated by the rotation of the travel motor 23 will not be transmitted to the power interface 20, or will not be transmitted to other functional modules, or will not be transmitted to the cutting motor 25, thereby avoiding abnormal operation of other functional modules in the lawn mower 100 or rotation of the cutting motor 25 to cause safety accidents.

[0053] In one embodiment, the circuit switch 26 can be a relay. In one embodiment, the relay is at least a two-phase relay, for example, a two-phase relay or a three-phase relay, that is, the relay can at least be electrically connected to the two-phase windings of the travel motor 23, and at least control the conduction state of the two-phase windings of the travel motor 23. In this embodiment, the relay is a normally open relay and can maintain a normally open state. Exemplarily, when the lawn mower 100 is working normally, the controller 21 can control the normally open relay to switch from a normally open state to a closed state, and conduct the power supply circuit 231. When the travel motor 23 generates generated electricity, the controller 21 controls the relay to return to the normally open state and disconnect the power supply circuit 231.

[0054] In one embodiment, the loop switch 26 may also be a thyristor.

[0055] In the above embodiment, since the control switch 26 is connected to the three-phase winding of the travel motor 23, when the control switch 26 is disconnected, the generated electric energy of the travel motor 23 cannot be transmitted, but is consumed in its own winding and converted into heat.

[0056] In one implementation, the loop switch 26 may also be connected to the three-phase winding of the cutting motor 25. When the travel motor 23 generates generated electric energy, the controller 21 controls the loop switch 26 to be disconnected, so that the generated electric energy cannot drive the cutting motor 25. The generated electric energy in this case may cause other functional modules to work abnormally, such as causing the indicator light to light abnormally, or the UI interface to light abnormally.

[0057] In one embodiment, the functional module in the lawn mower 100 may have at least two working modes. When the lawn mower 100 is working normally, the functional module is working in the first working mode. When the functional module is working by generating electric energy, the functional module is working in the second working mode. For example, when the lawn mower 100 is working normally, the indicator light is working normally. When the travel motor 23 generates generated electric energy to light up the indicator light, the indicator light may flash at a certain frequency or color or quantity to indicate to the user that the power is currently being supplied by the generated electric energy, thereby avoiding the user from misunderstanding that the lawn mower is damaged. Alternatively, when the travel motor 23 generates generated electric energy to make the UI end power, "No special abnormality" or other prompt text may be displayed through the UI interface to remind the user that the current abnormal power is normal.

[0058] In one implementation, when the battery pack 300 is connected to the power interface 20, if the travel motor 23 generates power, the controller 21 can control the power to reversely charge the battery pack 300, that is, to recycle the power generated by the travel motor 23 to the battery pack 300. This can not only avoid abnormalities in other functional modules caused by power, avoid abnormal startup of the cutting motor 25, but also increase the power of the battery pack 300.

[0059] In one implementation, the control circuit 2000 may also be provided with an energy storage element (not shown), and the controller 21 may store the generated electric energy generated by the travel motor 23 in the energy storage element. In one embodiment, the energy storage element may be a capacitor or a resistor, and the type of the energy storage element is not limited here. In this embodiment, the energy storage element may also release the stored electric energy when the battery pack 300 is low on power, or may supply the stored electric energy to other functional modules, or may transmit the stored electric energy to the battery pack 300.

[0060] In one implementation, when the generated electric energy generated by the travel motor 23 is detected, the controller 21 can at least control the conduction state of the switch element in the second drive circuit 24 to short-circuit the three-phase winding of the cutting motor 25, so that the generated electric energy is consumed by the short-circuit braking of the cutting motor 25. Exemplarily, the controller 21 can control the three low-side switch elements in the second drive circuit 24 to conduct, so as to short-circuit the three-phase windings u, v, and w of the cutting motor 25.

[0061] In the present application, at least one of the above-mentioned various embodiments can be used to prevent the generated electric energy from driving the cutting motor 23. For example, on the basis of setting the loop switch 26 in the control circuit 2000, the three-phase windings of the cutting motor 25 can be short-circuited at the same time, which can prevent the controller 21 from failing to control the loop switch 26, or short-circuiting the brake from failing. Other combinations of embodiments are not listed here one by one.

[0062] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A push lawn mower, comprising: A main machine, comprising at least a traveling assembly and a traveling motor for driving the traveling assembly, and a cutting assembly and a cutting motor for driving the cutting assembly; A handle device, connected to the host, comprising at least an operating member for a user to operate; A controller configured to at least control the working states of the travel motor and the cutting motor; A power interface, used to receive electric energy capable of supplying power to at least the travel motor and the cutting motor; in, The travel motor can be driven by external force and generate electricity; The controller is configured to: When the travel motor generates the generated electric energy, the electric energy transmission path of the travel motor is disconnected.

2. The push lawn mower according to claim 1, characterized in that: The hand-push lawn mower further comprises: a circuit switch for controlling the on-off of the power supply circuit of the travel motor.

3. The push lawn mower according to claim 2, characterized in that: The controller is further configured to: control the circuit switch to disconnect the power supply circuit when the travel motor is driven by an external force; and control the circuit switch to connect the power supply circuit when the travel motor is driven by the electric energy connected to the power supply interface.

4. The push lawn mower according to claim 2, characterized in that: The loop switch includes a relay.

5. The push lawn mower according to claim 2, characterized in that: The loop switch includes a normally open relay.

6. The push lawn mower according to claim 4, characterized in that: The relay is at least a two-phase relay.

7. The push lawn mower according to claim 2, characterized in that: The loop switch includes a thyristor.

8. The push lawn mower according to claim 1, characterized in that: The travel motor includes a wheel hub motor.

9. The push lawn mower according to claim 1, characterized in that: The push-type lawn mower moves under the positive push or reverse pull of an external force, and the travel motor can generate power.

10. A hand-propelled working machine, comprising: A main machine, comprising at least a traveling assembly and a traveling motor for driving the traveling assembly, and a cutting assembly and a cutting motor for driving the cutting assembly; A handle device, connected to the host, comprising at least an operating member for a user to operate; A controller configured to at least control the working states of the travel motor and the cutting motor; A power interface, used to receive electric energy capable of supplying power to at least the travel motor and the cutting motor; in, The travel motor can be driven by external force and generate electricity; The controller is configured to: When the travel motor generates the generated electric energy, the generated electric energy is controlled to at least not supply power to the cutting motor.

11. The hand-push working machine according to claim 10, characterized in that: The controller is further configured to: when the power interface is connected to a battery pack, control the generated electrical energy to charge the battery pack.

12. The hand-push working machine according to claim 10, characterized in that: The push-type working machine further includes: an indicator light; and the controller is further configured to control the generated electric energy to supply power to the indicator light.

13. The hand-push working machine according to claim 10, characterized in that: The hand-push working machine further includes: a UI end; the controller is further configured to control the generated electric energy to supply power to the UI end.

14. The hand-push working machine according to claim 10, characterized in that: The hand-push working machine further includes: an energy storage element; and the controller is further configured to control the generated electric energy to be stored in the energy storage element.

15. The hand-push working machine according to claim 10, characterized in that: The hand-push working machine further comprises: a circuit switch for controlling the on-off of the power supply circuit of the travel motor.

16. The hand-push working machine according to claim 15, characterized in that: The controller is further configured to: control the circuit switch to disconnect the power supply circuit when the travel motor is driven by an external force; and control the circuit switch to connect the power supply circuit when the travel motor is driven by the electric energy connected to the power supply interface.

17. The hand-push working machine according to claim 15, characterized in that: The loop switch includes a relay.

18. A hand-propelled working machine, comprising: A main machine, comprising at least a traveling assembly and a traveling motor for driving the traveling assembly, and a cutting assembly and a cutting motor for driving the cutting assembly; A first driving circuit, configured to drive the travel motor; a second driving circuit, configured to drive the cutting motor; A handle device, connected to the host, comprising at least an operating member for a user to operate; A controller configured to at least control the working states of the travel motor and the cutting motor; A power interface, used to receive electric energy capable of supplying power to at least the travel motor and the cutting motor; in, The travel motor can be driven by external force and generate electricity; The controller is configured to: When the travel motor generates the generated electric energy, the second drive circuit is controlled to change the conduction state to short-circuit the stator winding of the cutting motor.

19. The hand-push working machine according to claim 18, characterized in that: The push-type working machine further includes: an indicator light; and the controller is further configured to control the generated electric energy to supply power to the indicator light.

20. The hand-push working machine according to claim 18, characterized in that: The hand-push working machine further includes: a UI end; the controller is further configured to control the generated electric energy to supply power to the UI end.

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