Hand-push lawn mower and control method thereof

Abstract

The present invention relates to the technical field of electric tools, and discloses a hand-push lawn mower and a control method thereof. The hand-push lawn mower includes a main body, a traveling roller, a driving motor, a gripping device, a connecting rod, a first detection device and a control device. The driving motor is connected to the traveling roller and is used to drive the traveling roller to rotate; the connecting rod is respectively connected to the main body and the gripping device, and the gripping device can be displaced relative to the connecting rod; the first detection device is used to detect the position of the gripping device relative to the connecting rod; the control device is respectively connected to the detection device and the driving motor and is used to adjust the acceleration of the driving motor according to the detection signal; the gripping device has a plurality of different position areas relative to the connecting rod, and each position area corresponds to a different acceleration of the driving motor. Even if the gripping device shakes, as long as it is located in the same position area, the acceleration of the driving motor remains stable, that is, the speed is still in a state of steady increase or decrease or no change.

Description

Technical Field

[0001] The present invention relates to the technical field of electric tools, and in particular to a hand-push lawn mower and a control method thereof. Background Art

[0002] Existing walkable electric tools, such as lawn mowers and snow blowers, are all equipped with an operation for users to push. Taking a lawn mower as an example, a lawn mower generally relies on the thrust applied by the operator to the operating lever to move on the ground and perform cutting operations. In order to improve the self-driving function and user experience of the lawn mower, a technology that can automatically adjust the speed of the lawn mower has emerged. Specifically, a handle that can move relative to the operating lever is provided on the operating lever. The position of the handle relative to the operating lever is detected by a sensor and a signal is output. The controller controls the drive motor according to the output signal of the sensor, thereby adjusting the speed of the lawn mower. Although this solution can automatically adjust the speed of the lawn mower according to the user's thrust to a certain extent, in actual use, once the handle shakes relative to the operating lever, it will cause a change in speed, resulting in a relatively unstable speed of the lawn mower, affecting the performance. Summary of the Invention

[0003] Based on this, it is necessary to provide a hand-push lawn mower and a control method thereof to address the problem of unstable travel speed of existing lawn mowers.

[0004] A push lawn mower comprising:

[0005] main body;

[0006] A traveling roller connected to the main body;

[0007] A driving motor connected to the traveling roller and used to drive the traveling roller to rotate;

[0008] A gripping device and a connecting rod, wherein the gripping device is for a user to grip, the connecting rod respectively connects the main body and the gripping device, and the gripping device can be displaced relative to the connecting rod under external force;

[0009] a first detection device, configured to detect a position of the holding device relative to the connecting rod;

[0010] a control device, connected to the detection device and the drive motor, respectively, for adjusting the acceleration of the drive motor according to the position of the holding device relative to the connecting rod;

[0011] The holding device has a plurality of different position areas relative to the connecting rod, and each position area corresponds to a different acceleration of the driving motor;

[0012] The multiple different position areas include a steady-speed area, an acceleration area and a deceleration area. The holding device is automatically located in the middle of the steady-speed area when not affected by external force. When the holding device is in the steady-speed area, the acceleration of the drive motor is 0. When the holding device is displaced toward the direction approaching the main body under the action of external force, it can enter the acceleration area from the steady-speed area. When the holding device is displaced toward the direction away from the main body under the action of external force, it can enter the deceleration area from the steady-speed area.

[0013] In one embodiment, the acceleration area includes multiple sub-acceleration areas, and the acceleration of the drive motor corresponding to each sub-acceleration area is different. The deceleration area includes multiple sub-deceleration areas, and the acceleration of the drive motor corresponding to each sub-deceleration area is different.

[0014] In one embodiment, the acceleration area includes a first sub-acceleration area and a second sub-acceleration area. When the holding device moves toward the main body, it passes through the first sub-acceleration area and the second sub-acceleration area in sequence. When the holding device is located in the first sub-acceleration area, the corresponding acceleration of the drive motor is less than the corresponding acceleration of the drive motor when the holding device is located in the second sub-acceleration area.

[0015] In one embodiment, the deceleration area includes a first sub-deceleration area and a second sub-deceleration area. When the holding device moves away from the main body, it passes through the first sub-deceleration area and the second sub-deceleration area in sequence. When the holding device is located in the first sub-deceleration area, the corresponding acceleration of the drive motor is greater than the acceleration of the drive motor when the holding device is located in the second sub-deceleration area.

[0016] In one embodiment, it further includes:

[0017] a second detection device, connected to the drive motor and the control device respectively, for detecting the speed of the drive motor and feeding back to the control device;

[0018] The control device is further configured to adjust the speed of the drive motor according to feedback information from the second control device.

[0019] In one embodiment, the first detection device includes a Hall sensor and a magnet that cooperate with each other.

[0020] In one embodiment, the Hall sensor is provided on the holding device, and the magnet is provided on the connecting rod;

[0021] Alternatively, the Hall sensor is arranged on the connecting rod, and the magnet is arranged on the holding device.

[0022] In one embodiment, the first detection device includes a photoelectric sensor and a light source that cooperate with each other, the photoelectric sensor is arranged on the holding device, and the light source is arranged on the connecting rod; or, the photoelectric sensor is arranged on the connecting rod, and the light source is arranged on the holding device.

[0023] In one embodiment, the first detection device is a potentiometer, which includes an adjusting rod and a resistor, wherein the adjusting rod is arranged on the holding device, and the resistor is arranged on the connecting rod; or, the adjusting rod is arranged on the connecting rod, and the resistor is arranged on the holding device.

[0024] A control method for the above-mentioned push lawn mower includes:

[0025] Detecting the position of the holding device relative to the connecting rod by a first detection device;

[0026] The acceleration of the drive motor is adjusted by the control device according to the position of the holding device relative to the connecting rod. The holding device has multiple different position areas relative to the connecting rod, and each position area corresponds to a different acceleration of the drive motor.

[0027] The push mower provided by the present application changes the position of the gripping device relative to the connecting rod when the user's walking speed changes. The first detection device can generate a detection signal based on the position of the gripping device relative to the connecting rod, and the control device then adjusts the acceleration of the drive motor based on the detection signal of the first detection device. That is, the control device can adjust the acceleration of the drive motor according to the user's walking speed, so that the speed of the push mower adapts to the user's speed. Because the control device adjusts the acceleration of the drive motor when the gripping device is in different position areas relative to the connecting rod, in actual use, even if the gripping device shakes, as long as it is in the same position area, the acceleration of the drive motor can remain stable, that is, the speed remains in a state of steady increase, decrease, or no change. In addition, when the position area changes, the acceleration of the drive motor changes only at the moment of change, and the speed change actually perceived by the user is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of a hand-push lawn mower provided in an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of the connection between the gripping device and the connecting rod of the push lawn mower provided in an embodiment of the present invention;

[0030] Figure 3 Schematic diagram of various position areas of the gripping device of a push lawn mower provided by an embodiment of the present invention.

[0031] Reference numerals:

[0032] 10-main body; 11-travel roller; 12-drive motor; 13-holding device; 14-connecting rod; 15-first detection device; 151-first Hall sensor; 152-second Hall sensor; 153-magnet; 16-control device; 17-locking button; 18-stable area; 19-acceleration area; 191-first sub-acceleration area; 192-second sub-acceleration area; 20-deceleration area; 201-first sub-deceleration area; 202-second sub-deceleration area; 100-elastic component. DETAILED DESCRIPTION

[0033] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intervening element. When an element is considered to be "connected" to another element or "connected to" another element, it may be directly connected to the other element or there may be an intervening element, and this should be understood broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0035] The terms "vertical", "horizontal", "left", "right", "up", "down", "front", "rear", "circumferential" and similar expressions used in this document are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0036] Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] An embodiment of the present invention provides a push lawn mower with a traveling function.

[0039] like Figure 1 and Figure 2 As shown, the push lawn mower provided in this embodiment includes a main body 10 , a travel roller 11 , a drive motor 12 , a gripping device 13 , a connecting rod 14 , a first detection device 15 and a control device 16 .

[0040] The main body 10 includes a cutting device, which is rotatably connected to the bottom of the main body 10 and is used to perform a cutting action. The travel roller 11 is installed at the bottom or side of the main body 10, and is used to support the main body 10 and drive the main body 10 to move. The drive motor 12 is connected to the travel roller 11, and is used to provide driving force for the travel roller 11 to drive the travel roller 11 to rotate and move. The gripping device 13 is for the user to hold, and the connecting rod 14 connects the main body 10 and the gripping device 13 respectively. The gripping device 13 can be displaced relative to the connecting rod 14 under external forces. It should be noted that an elastic component 100 is provided between the gripping device 13 and the connecting rod 14. When there is no external thrust, the gripping device 13 and the connecting rod 14 are in a stable state under the action of the elastic component 100. When an external force occurs, the gripping device 13 overcomes the force of the elastic component 100 under the action of the external force and is displaced relative to the connecting rod 14. Specifically, when the user's walking speed is greater than the travel speed of the travel rollers 11, the gripping device 13 is forced to move toward the main body 10. When the user's walking speed is less than the travel speed of the travel rollers 11, the gripping device 13 is pulled and displaced away from the main body 10. In this embodiment, the displacement direction of the gripping device 13 can be the axial direction of the connecting rod 14.

[0041] The first detection device 15 is used to detect the position of the holding device relative to the connecting rod. Specifically, the first detection device 15 generates a detection signal based on the position of the holding device 13 relative to the connecting rod 14. The control device 16 is respectively connected to the first detection device 15 and the drive motor 12, and is used to receive the detection signal and adjust the acceleration of the drive motor 12 based on the detection signal.

[0042] As an optional implementation, Figure 2As shown, the first detection device 15 can be a Hall sensor and a magnet 153 that cooperate with each other. The Hall sensor is arranged on the holding device 13, and the magnet 153 is arranged on the connecting rod 14.

[0043] Specifically, in this embodiment, the number of Hall sensors is set to two, namely the first Hall sensor 151 and the second Hall sensor 152. When the holding device 13 is not subjected to external thrust, the first Hall sensor 151 and the second Hall sensor 152 are symmetrically distributed on both sides of the magnet 153. Assuming that the first Hall sensor 151 is close to the user and the second Hall sensor 152 is close to the main body 10, when the holding device 13 is subjected to external thrust (that is, the user speed is greater than the travel speed of the main body 10), the holding device 13 approaches the main body 10, and the connecting rod 14 does not move, that is, the holding device 13 is displaced toward the main body 10 relative to the connecting rod 14. At this time, the first Hall sensor 151 approaches the magnet 153, and the second Hall sensor 152 moves away from the magnet 153. The strength of the magnet 153 detected by the first Hall sensor 151 increases, and the output Hall voltage increases. The magnetic field strength detected by the second Hall sensor 152 decreases, and the output Hall voltage decreases.

[0044] When the external thrust on the holding device 13 decreases (i.e., the user speed and the travel speed of the main body 10 gradually approach each other), the holding device 13 gradually returns to its original position, that is, the first Hall sensor 151 and the second Hall sensor 152 are reset, that is, symmetrically distributed on both sides of the magnet 153. At this time, the magnetic field strengths detected by the first Hall sensor 151 and the second Hall sensor 152 are the same, and the output voltages of the two are the same.

[0045] When the external thrust applied to the holding device 13 is further reduced to less than 0, that is, when it is subjected to external pulling force (that is, the user speed is less than the travel speed of the main body 10), the holding device 13 is displaced relative to the connecting rod 14 in the direction away from the main body 10. At this time, the first Hall sensor 151 is away from the magnet 153, and the second Hall sensor 152 is close to the magnet 153. The magnetic field strength detected by the first Hall sensor 151 decreases, and the output Hall voltage decreases. The magnetic field strength detected by the second Hall sensor 152 increases, and the output Hall voltage increases.

[0046] As the external force acting on the holding device 13 changes, that is, when the relationship between the user speed and the travel speed of the main body 10 changes, the position of the holding device 13 relative to the connecting rod 14 will change, and the detection signal generated by the first detection device 15 will change. The control device 16 will adjust the acceleration of the drive motor 12 according to different detection signals to adapt the speed of the main body 10 to the user speed. Taking the above-mentioned Hall sensor as an example, when the holding device 13 is displaced relative to the connecting rod 14, the magnetic field strength sensed by the first Hall sensor 151 and the second Hall sensor 152 will change, thereby changing the output Hall voltage. The controller controls the drive motor 12 according to the Hall voltage output by the first Hall sensor 151 and the second Hall sensor 152.

[0047] As an alternative embodiment, the Hall sensor is provided on the connecting rod 14, and the magnet 153 is provided on the gripping device 13. That is, when the gripping device 13 is displaced relative to the connecting rod 14, the magnet 153 on the gripping device 13 is also displaced relative to the Hall sensor on the connecting rod 14. The magnetic field detected by the Hall sensor changes, and the Hall voltage output thereby changes. The control device 16 controls the drive motor 12 based on the Hall voltage.

[0048] As a first variation, the first detection device 15 can be a photoelectric sensor and a light source that cooperate with each other, with the photoelectric sensor being disposed on the gripping device 13 and the light source being disposed on the connecting rod 14. In this variation, the number of photoelectric sensors can be set to two: a first photoelectric sensor and a second photoelectric sensor, both of which are disposed on the gripping device 13, and the light source being disposed on the connecting rod 14. When the gripping device 13 is displaced relative to the connecting rod 14 toward the main body 10, the first photoelectric sensor approaches the light source and the second photoelectric sensor moves away from it, causing the distance signal detected by the first photoelectric sensor to increase while the distance signal detected by the second photoelectric sensor to decrease. When the gripping device 13 is displaced relative to the connecting rod 14 toward the main body 10, the first photoelectric sensor moves away from the light source and the second photoelectric sensor moves toward it, causing the distance signal detected by the first photoelectric sensor to decrease while the distance signal detected by the second photoelectric sensor to increase. That is, when the gripping device 13 is displaced relative to the connecting rod 14, the distance signals output by the first and second photoelectric sensors change.

[0049] As an alternative embodiment, the photoelectric sensor is provided on the connecting rod 14, and the light source is provided on the gripping device 13. That is, when the gripping device 13 is displaced relative to the connecting rod 14, the light source on the gripping device 13 is also displaced relative to the photoelectric sensor on the connecting rod 14, and the distance signal detected by the photoelectric sensor changes. The control device 16 controls the drive motor 12 based on the distance signal from the photoelectric sensor.

[0050] As a second variation, the first detection device 15 can be a potentiometer, which includes an adjustment rod and a resistor. The adjustment rod is mounted on the gripping device 13, and the resistor is mounted on the connecting rod 14. As the gripping device 13 moves relative to the connecting rod 14, the adjustment rod adjusts the resistor. When the gripping device 13 moves relative to the connecting rod 14, the adjustment rod on the gripping device 13 also moves the resistor on the connecting rod 14, causing the voltage signal output by the potentiometer to change. The control device 16 then controls the drive motor 12 based on the voltage signal output by the potentiometer.

[0051] As an alternative embodiment, the adjustment rod is provided on the connecting rod 14, and the resistor is provided on the gripping device 13. That is, when the gripping device 13 moves relative to the connecting rod 14, the resistor on the gripping device 13 will also move relative to the adjustment rod on the connecting rod 14. That is, the adjustment rod adjusts the resistance of the resistor, and the voltage signal output by the potentiometer changes. The control device 16 then controls the drive motor 12 based on the voltage signal output by the potentiometer.

[0052] In addition to the above-mentioned Hall sensors, photoelectric sensors, and potentiometers, the first detection device 15 can also use other electronic components with the same functions. As long as they can generate electrical signals based on the change in the position of the holding device 13 relative to the connecting rod 14, the purpose of this application can be achieved.

[0053] In this embodiment, the gripping device 13 has multiple different positional regions relative to the connecting rod 14. Each positional region corresponds to a different acceleration of the drive motor 12, and the acceleration of the drive motor 12 within each positional region is the same. That is, when the gripping device 13 moves within a single positional region, the acceleration of the drive motor 12 remains unchanged. However, when the gripping device 13 moves across positional regions, the acceleration of the drive motor 12 changes.

[0054] Taking the above-mentioned Hall sensor as an example, in actual application, when the Hall voltage output by the first Hall sensor 151 and the second Hall sensor 152 is within a certain range of variation, it can be determined that the holding device 13 is in the same position area relative to the connecting rod 14, and the control device 16 controls the acceleration of the drive motor 12 to remain unchanged; when the Hall voltage output by the first Hall sensor 151 and the second Hall sensor 152 exceeds the range of variation, it is determined that the holding device 13 is in another position area relative to the connecting rod 14, and the control device 16 controls the acceleration change of the drive motor 12.

[0055] Therefore, when the user's walking speed changes, the position of the holding device 13 relative to the connecting rod 14 will change. The first detection device 15 can generate a detection signal based on the position of the holding device 13 relative to the connecting rod 14, and the control device 16 then adjusts the acceleration of the drive motor 12 according to the detection signal of the first detection device 15. That is, the control device 16 can adjust the acceleration of the drive motor 12 according to the user's walking speed, so that the speed of the hand-push lawn mower adapts to the speed of the user.

[0056] Furthermore, since each position zone corresponds to a different acceleration of the drive motor 12, the acceleration of the drive motor 12 within each position zone is the same. Therefore, in actual use, even if the gripping device 13 vibrates, as long as it is within the same position zone, the acceleration of the drive motor 12 remains stable, i.e., the speed remains in a state of steady increase, decrease, or no change. Furthermore, when the position zone changes, the acceleration of the drive motor 12 changes only at the moment of the change, and the actual speed change perceived by the user is minimal.

[0057] As an optional embodiment, the acceleration of the drive motor 12 increases or decreases according to the arrangement direction of each position area. That is, the acceleration of the drive motor 12 changes with the position area of the gripping device 13 in a certain linear relationship. This makes the acceleration of the drive motor 12 change relatively smoothly without sudden changes, thereby improving the stability of the push lawn mower.

[0058] As an optional embodiment, when the holding device 13 is displaced in a direction closer to the main body 10, the acceleration of the drive motor 12 increases, and when the holding device 13 is displaced in a direction away from the main body 10, the acceleration of the drive motor 12 decreases. When the holding device 13 is displaced in a direction closer to the main body 10, that is, the user's walking speed is greater than the traveling speed of the main body 10, at this time, the control device 16 controls the acceleration of the drive motor 12 to increase, which helps the traveling speed of the main body 10 to increase smoothly to the walking speed of the user. When the holding device 13 is displaced in a direction away from the main body 10, that is, the user's walking speed is less than the traveling speed of the main body 10, at this time, the control device 16 controls the acceleration of the drive motor 12 to decrease, which helps the traveling speed of the main body 10 to decrease smoothly to the walking speed of the user.

[0059] As an optional implementation, Figure 3 As shown, the position area includes a steady-speed area 18. When the holding device 13 is not affected by external forces, the holding device 13 and the connecting rod 14 are automatically in an initial stable state under the action of the elastic component 100. At this time, the holding device 13 is located in the middle of the steady-speed area 18 relative to the connecting rod 14, and the acceleration of the drive motor 12 is 0. When the holding device 13 is located in the steady-speed area 18 relative to the connecting rod 14, the acceleration of the drive motor 12 is set to 0, that is, the travel speed of the traveling roller 11 remains unchanged. At this time, the user does not need to provide thrust to the holding device 13. The user only needs to hold the holding device 13 and keep the holding device 13 in the current position area to keep the speed of the main body 10 constant. Even if the holding device 13 accidentally shakes and moves forward and backward relative to the connecting rod 14, as long as it is located in this position area, the travel speed of the main body 10 remains unchanged, and the stability is good.

[0060] As an optional implementation, Figure 3As shown, the position area includes an acceleration area 19 and a deceleration area 20 distributed on both sides of the steady-speed area 18. When the holding device 13 is displaced toward the main body 10 under the action of an external force, it can enter the acceleration area 19 from the steady-speed area 18. When the holding device 13 is displaced toward the direction away from the main body 10 under the action of an external force, it can enter the deceleration area 20 from the steady-speed area 18. When the holding device 13 is located in the acceleration area 19 relative to the connecting rod 14, the acceleration of the drive motor 12 is greater than 0. When the holding device 13 is located in the deceleration area 20 relative to the connecting rod 14, the acceleration of the drive motor 12 is less than 0. In this embodiment, the acceleration area 19 is located on the side of the steady-speed area 18 close to the main body 10, and the deceleration area 20 is located on the side of the steady-speed area 18 away from the main body 10. In actual application, when the holding device 13 is located in the acceleration area 19 relative to the connecting rod 14, the acceleration of the drive motor 12 is greater than 0, that is, the traveling roller 11 accelerates; conversely, when the holding device 13 is located in the deceleration area 20 relative to the connecting rod 14, the acceleration of the drive motor 12 is less than 0, that is, the traveling roller 11 decelerates.

[0061] As an optional embodiment, the acceleration zone 19 may further include multiple sub-acceleration zones, each corresponding to a different acceleration of the drive motor. The deceleration zone 20 may further include multiple sub-deceleration zones, each corresponding to a different acceleration of the drive motor. In other words, by providing sub-acceleration and deceleration zones with different accelerations, the lawn mower can further adapt to the user's varying walking speeds, thereby improving its automation level.

[0062] As a further optional embodiment, the acceleration region 19 includes a first sub-acceleration region 191 and a second sub-acceleration region 192. When the gripping device 13 moves toward the main body 10, it sequentially passes through the first sub-acceleration region 191 and the second sub-acceleration region 192. When the gripping device 13 is in the first sub-acceleration region 191, the corresponding acceleration of the drive motor 12 is less than the corresponding acceleration of the drive motor 12 when the gripping device 13 is in the second sub-acceleration region 192. In other words, the acceleration region 19 of the main body 10 is further divided into different zones, so that when the gripping device 13 passes through the steady-speed region 18 and reaches the acceleration region 19, the acceleration increases in a certain level, allowing the main body 10 to accelerate smoothly.

[0063] The deceleration region 20 includes a first sub-deceleration region 201 and a second sub-deceleration region 202. When the gripping device 13 moves away from the main body 10, it sequentially passes through the first sub-deceleration region 201 and the second sub-deceleration region 202. When the gripping device 13 is in the first sub-deceleration region 201, the corresponding acceleration of the drive motor 12 is greater than when the gripping device 13 is in the second sub-deceleration region 202. In other words, the deceleration region 20 of the main body 10 is further divided into different zones, so that when the gripping device 13 reaches the deceleration region 20 from the steady speed region 18, the acceleration decreases in a certain level, allowing the main body 10 to decelerate smoothly.

[0064] The magnitude of the acceleration of each sub-acceleration region and sub-deceleration region can be set according to actual needs as long as monotonicity is satisfied, and no restriction is imposed here.

[0065] In this embodiment, the acceleration area 19 can be rezoned separately, the deceleration area 20 can be rezoned separately, or both the acceleration area 19 and the deceleration area 20 can be rezoned simultaneously, which can be set according to actual needs.

[0066] It should be noted that the control of the drive motor 12 by the control device 16 actually involves adjusting the voltage of the drive motor 12 , thereby adjusting its rotational speed, and at the same time adjusting its acceleration through program settings.

[0067] As an optional embodiment, the push lawn mower in this embodiment further includes a second detection device, which is connected to the drive motor 12 and the control device 16, respectively, for detecting the speed of the drive motor 12 and providing feedback to the control device 16. The control device 16 is further configured to adjust the speed of the drive motor 12 based on the feedback information from the second control device 16. The second detection device is a speed sensor, which provides feedback information to the control device 16, thereby improving the adjustment accuracy of the control device 16.

[0068] As an optional implementation, Figure 2 As shown, the push mower further includes a locking button 17, which can be used to secure the gripping device 13 and the connecting rod 14, maintaining their relative positions. Thus, when the gripping device 13 is in the steady-speed region 18, the locking button 17 can be used to secure the gripping device 13 and the connecting rod 14, maintaining the gripping device 13 in the steady-speed region 18 and the speed of the drive motor 12. Furthermore, before starting the push mower, the gripping device 13 and the connecting rod 14 can be secured using the locking button 17, as needed.

[0069] This embodiment also provides a control method for the above-mentioned push lawn mower, comprising the following steps:

[0070] Step S10: Detect the position of the gripping device relative to the connecting rod by the first detecting device. For details on how the first detecting device detects the position of the gripping device relative to the connecting rod, please refer to the above description of the push lawn mower, which will not be repeated here.

[0071] Step S11: The control device adjusts the acceleration of the drive motor based on the position of the gripping device relative to the connecting rod. The gripping device has multiple different position ranges relative to the connecting rod, each corresponding to a different acceleration of the drive motor. For details on the control device's control of the drive motor and the position ranges, please refer to the aforementioned description of the push mower and will not be repeated here.

[0072] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A push lawn mower comprising: main body; A traveling roller connected to the main body; A driving motor connected to the traveling roller and used to drive the traveling roller to rotate; A gripping device and a connecting rod, wherein the gripping device is for a user to grip, the connecting rod respectively connects the main body and the gripping device, and the gripping device can be displaced relative to the connecting rod under external force; a first detection device, configured to detect a position of the holding device relative to the connecting rod; a control device, connected to the first detection device and the drive motor respectively; It is characterized in that the control device is used to adjust the acceleration of the drive motor according to the position area of the holding device relative to the connecting rod; The holding device has a plurality of different position areas relative to the connecting rod, and each position area corresponds to a different acceleration of the driving motor; The multiple different position areas include a steady-speed area, an acceleration area and a deceleration area. The holding device is automatically located in the middle of the steady-speed area when not affected by external force. When the holding device is in the steady-speed area, the acceleration of the drive motor is 0, causing the holding device to shake unexpectedly and move forward and backward relative to the connecting rod. As long as the holding device is located in the steady-speed area, the moving speed of the main body remains unchanged; when the holding device is displaced toward the direction approaching the main body under the action of external force, it can enter the acceleration area from the steady-speed area, and when the holding device is displaced toward the direction away from the main body under the action of external force, it can enter the deceleration area from the steady-speed area.

2. The push lawn mower according to claim 1, wherein: The acceleration region includes a plurality of sub-acceleration regions, each of which corresponds to a different acceleration of the drive motor; the deceleration region includes a plurality of sub-deceleration regions, each of which corresponds to a different acceleration of the drive motor.

3. The push lawn mower according to claim 2, wherein: The acceleration area includes a first sub-acceleration area and a second sub-acceleration area. When the holding device moves toward the direction close to the main body, it passes through the first sub-acceleration area and the second sub-acceleration area in sequence. When the holding device is located in the first sub-acceleration area, the corresponding acceleration of the drive motor is less than the corresponding acceleration of the drive motor when the holding device is located in the second sub-acceleration area.

4. The push lawn mower according to claim 2, wherein: The deceleration area includes a first sub-deceleration area and a second sub-deceleration area. When the holding device moves away from the main body, it passes through the first sub-deceleration area and the second sub-deceleration area in sequence. When the holding device is located in the first sub-deceleration area, the corresponding acceleration of the drive motor is greater than the corresponding acceleration of the drive motor when the holding device is located in the second sub-deceleration area.

5. The push lawn mower according to claim 1, wherein: Also includes: a second detection device, connected to the drive motor and the control device respectively, for detecting the speed of the drive motor and feeding back to the control device; The control device is further configured to adjust the speed of the drive motor according to feedback information from the second detection device.

6. The push lawn mower according to claim 1, wherein: The first detection device includes a Hall sensor and a magnet that cooperate with each other.

7. The push lawn mower according to claim 6, wherein: The Hall sensor is provided on the holding device, and the magnet is provided on the connecting rod; Alternatively, the Hall sensor is arranged on the connecting rod, and the magnet is arranged on the holding device.

8. The push lawn mower according to claim 1, wherein: The first detection device includes a photoelectric sensor and a light source that cooperate with each other, the photoelectric sensor is arranged on the holding device, and the light source is arranged on the connecting rod; or, the photoelectric sensor is arranged on the connecting rod, and the light source is arranged on the holding device.

9. The push lawn mower according to claim 1, wherein: The first detection device is a potentiometer, which includes an adjusting rod and a resistor. The adjusting rod is arranged on the holding device, and the resistor is arranged on the connecting rod; or the adjusting rod is arranged on the connecting rod, and the resistor is arranged on the holding device.

10. A control method for a push lawn mower according to any one of claims 1 to 9, characterized in that: include: Detecting the position of the holding device relative to the connecting rod by a first detection device; The acceleration of the drive motor is adjusted by the control device according to the position area of the holding device relative to the connecting rod. The holding device has multiple different position areas relative to the connecting rod, and each position area corresponds to a different acceleration of the drive motor.

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