CN213187209U

CN213187209U - Hand-push mower

Info

Publication number: CN213187209U
Application number: CN202020243307.5U
Authority: CN
Inventors: 陆骏
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2021-05-14
Anticipated expiration: 2030-03-03

Abstract

The utility model relates to an electric tool technical field discloses a hand push lawn mower. The hand-push mower comprises a main body, an advancing roller, a driving motor, a holding device, a connecting rod, a first detection device and a control device, wherein the driving motor is connected with the advancing roller and used for driving the advancing roller to rotate; the connecting rod is respectively connected with the main body and the holding device, and the holding device can move relative to the connecting rod; the first detection device is used for detecting the position of the holding device relative to the connecting rod; the control device is respectively connected with the detection device and the driving motor and used for adjusting the acceleration of the driving motor according to the detection signal; the holding device has a plurality of different position areas relative to the connecting rod, and each position area corresponds to different accelerations of the driving motor. Even if the holding device shakes, the acceleration of the driving motor is kept stable as long as the holding device is located in the same position area, namely, the speed is still in a state of smooth increase or decrease or no change.

Description

Hand-push mower

Technical Field

The utility model relates to an electric tool technical field especially relates to a hand push lawn mower.

Background

Existing walk-able electric tools, such as lawn mowers and snow throwers, are provided with an operation for a user to push. In the case of a lawn mower, the lawn mower generally travels on the ground by the thrust applied to the operation lever by the operator and performs a cutting operation. In order to improve the self-driving function and user experience of the lawn mower, a technology capable of automatically adjusting the traveling speed of the lawn mower has been developed, specifically, a handle capable of moving relative to an operating rod is arranged on the operating rod, a sensor detects the position of the handle relative to the operating rod and outputs a signal, and a controller controls a driving motor according to the output signal of the sensor, so as to adjust the traveling speed of the lawn mower. Although the moving speed of the mower can be automatically adjusted to a certain extent according to the thrust of a user, when the mower is actually used, the speed is changed due to the fact that the handle shakes relative to the operating rod, the moving speed of the mower is unstable, and usability of the mower is affected.

SUMMERY OF THE UTILITY MODEL

Accordingly, it is necessary to provide a push mower in order to solve the problem of unstable traveling speed of the conventional mower.

A hand propelled lawn mower comprising:

a main body;

a travel roller connected with the main body;

the driving motor is connected with the travelling roller and is used for driving the travelling roller to rotate;

the holding device is used for being held by a user, the connecting rod is respectively connected with the main body and the holding device, and the holding device can displace relative to the connecting rod under the action of external force;

the first detection device is used for detecting the position of the holding device relative to the connecting rod;

the control device is respectively connected with the detection device and the driving motor and is used for adjusting the acceleration of the driving motor according to the position 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 different acceleration of the driving motor;

the holding device is automatically positioned in the middle of the speed stabilizing area when not affected by external force, and when the holding device is positioned in the speed stabilizing area, the acceleration of the driving motor is 0; when the holding device moves towards the direction close to the main body under the action of external force, the holding device can enter the accelerating area from the speed stabilizing area, and when the holding device moves towards the direction far away from the main body under the action of external force, the holding device can enter the decelerating area from the speed stabilizing area.

In one embodiment, the acceleration region includes a plurality of sub-acceleration regions, acceleration of the driving motor corresponding to each of the sub-acceleration regions is different, and the deceleration region includes a plurality of sub-deceleration regions, acceleration of the driving motor corresponding to each of the sub-deceleration regions is different.

In one embodiment, the acceleration region includes a first sub acceleration region and a second sub acceleration region, and when the holding device is displaced toward the main body, the holding device sequentially passes through the first sub acceleration region and the second sub acceleration region, and when the holding device is located in the first sub acceleration region, the acceleration of the corresponding driving motor is smaller than that when the holding device is located in the second sub acceleration region.

In one embodiment, the deceleration area includes a first sub-deceleration area and a second sub-deceleration area, when the holding device is displaced in a direction away from the main body, the holding device sequentially passes through the first sub-deceleration area and the second sub-deceleration area, and when the holding device is located in the first sub-deceleration area, the acceleration of the corresponding driving motor is greater than that when the holding device is located in the second sub-deceleration area.

In one embodiment, the method further comprises the following steps:

the second detection device is respectively connected with the driving motor and the control device and is used for detecting the speed of the driving motor and feeding the speed back to the control device;

the control device is also used for adjusting the speed of the driving motor according to the feedback information of the second control device.

In one embodiment, the first detection device comprises a hall sensor and a magnet which cooperate with each other.

In one embodiment, the hall sensor is arranged on the holding device, and the magnet is arranged on the connecting rod;

or, the hall sensor is arranged on the connecting rod, and the magnet is arranged on the holding device.

In one embodiment, the first detection device comprises a photoelectric sensor and a light source which are matched 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.

In one embodiment, the first detecting device is a potentiometer, the potentiometer includes an adjusting rod and a resistor, the adjusting rod is disposed on the holding device, and the resistor is disposed on the connecting rod; or, the adjusting rod is arranged on the connecting rod, and the resistor is arranged on the holding device.

In one embodiment, the electric bicycle further comprises an elastic assembly, the elastic assembly is arranged between the holding device and the connecting rod, and the holding device is automatically located in the middle of the speed stabilizing area under the action of the elastic assembly when not subjected to external force.

The application provides a hand push lawn mower, when user's walking speed changes, the position of holding device for the connecting rod just can change, and first detection device can produce the detected signal based on the position of holding device for the connecting rod, and controlling means adjusts driving motor's acceleration according to the detected signal of first detection device again, promptly, controlling means can adjust driving motor's acceleration according to user's walking speed for hand push lawn mower's speed adapts to user's speed. Because the control device adjusts the acceleration of the driving motor when the holding device is in different position areas relative to the connecting rod, even if the holding device shakes in actual use, the acceleration of the driving motor can be kept stable as long as the holding device is positioned in the same position area, namely, the speed is still in a stable increasing or decreasing or unchanging state. In addition, when the position area changes, only at the moment of the change, the acceleration of the driving motor changes, and the speed change that the user can actually feel is small.

Drawings

Fig. 1 is a schematic structural view of a hand-push mower according to an embodiment of the present invention;

fig. 2 is a schematic view of a connection between a holding device and a connecting rod of a hand-push mower according to an embodiment of the present invention;

fig. 3 is a schematic view of each position region where the holding device of the hand mower according to the embodiment of the present invention is located.

Reference numerals:

10-a body; 11-a travelling roller; 12-a drive motor; 13-a holding device; 14-a connecting rod; 15-a first detection device; 151-first hall sensor; 152-a second hall sensor; 153-a magnet; 16-a control device; 17-a locking button; 18-speed stabilization area; 19-an acceleration region; 191-a first sub-acceleration region; 192-a second sub-acceleration region; 20-a deceleration zone; 201-a first sub-deceleration zone; 202-a second sub-deceleration zone; 100-elastic component.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected to the other element or intervening elements may also be present, and are also to be broadly construed, e.g., as being fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those of ordinary skill in the art.

As used herein, the terms "vertical," "horizontal," "left," "right," "upper," "lower," "front," "rear," "circumferential," and the like are based on the orientation or positional relationship shown in the drawings and are intended to facilitate the description of the invention and to simplify the description, but do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The embodiment of the utility model provides a hand push lawn mower with function of marcing.

As shown in fig. 1 and 2, the hand mower provided in the present embodiment includes a main body 10, a traveling roller 11, a driving motor 12, a holding device 13, a connecting rod 14, a first detecting device 15, and a control device 16.

Wherein the body 10 comprises cutting means rotatably connected below the body 10 for performing a cutting action. The traveling roller 11 is installed below or at a side of the main body 10, and is used for supporting the main body 10 and driving the main body 10 to travel. The driving motor 12 is connected to the traveling roller 11 and is used for providing a driving force for the traveling roller 11 to drive the traveling roller 11 to rotationally travel. The holding device 13 is held by a user, the connecting rod 14 is respectively connected with the main body 10 and the holding device 13, and the holding device 13 can be displaced relative to the connecting rod 14 under the action of external force. It should be noted here that an elastic assembly 100 is disposed between the holding device 13 and the connecting rod 14, when there is no external thrust, the holding device 13 and the connecting rod 14 are in a stable state under the action of the elastic assembly 100, and when there is an external acting force, the holding device 13 overcomes the acting force of the elastic assembly 100 under the action of the external force, and generates a displacement relative to the connecting rod 14. Specifically, when the walking speed of the user is higher than the traveling speed of the traveling roller 11, the holding device 13 is forced to be displaced toward the main body 10, and when the walking speed of the user is lower than the traveling speed of the traveling roller 11, the holding device 13 is forced to be displaced toward the main body 10. In this embodiment, the displacement direction of the holding device 13 may be the axial direction of the connecting rod 14.

The first detecting device 15 is used for detecting the position of the holding device relative to the connecting rod, specifically, the first detecting device 15 generates a detecting signal based on the position of the holding device 13 relative to the connecting rod 14, and the control device 16 is respectively connected to the first detecting device 15 and the driving motor 12, and is used for receiving the detecting signal and adjusting the acceleration of the driving motor 12 based on the detecting signal.

As an alternative embodiment, as shown in fig. 2, the first detecting device 15 may be a hall sensor and a magnet 153, which are used in cooperation, the hall sensor is disposed on the holding device 13, and the magnet 153 is disposed on the connecting rod 14.

Specifically, in the present embodiment, the number of the hall sensors is set to two, and the hall sensors are the first hall sensor 151 and the second hall sensor 152. When the holding device 13 is not pushed by external force, the first hall sensor 151 and the second hall sensor 152 are symmetrically disposed 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 an external thrust (i.e., the user speed is greater than the traveling speed of the main body 10), the holding device 13 approaches toward the main body 10, and the connecting rod 14 is not moved, i.e., the holding device 13 is displaced relative to the connecting rod 14 toward the main body 10, at this time, the first hall sensor 151 approaches the magnet 153, the second hall sensor 152 is away from the magnet 153, the strength of the magnet 153 detected by the first hall sensor 151 increases, the output hall voltage increases, the strength of the magnetic field detected by the second hall sensor 152 decreases, and the output hall voltage decreases.

When the external thrust applied to the holding device 13 is reduced (i.e., the user speed and the traveling speed of the main body 10 gradually approach), the holding device 13 gradually returns to the original position, i.e., the first hall sensor 151 and the second hall sensor 152 are reset, i.e., symmetrically distributed on both sides of the magnet 153, and 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.

When the external pushing force applied to the holding device 13 is further reduced to be less than 0, that is, the external pulling force is applied (that is, the user speed is less than the traveling speed of the main body 10), the holding device 13 is displaced relative to the connecting rod 14 in a direction away from the main body 10, at this time, the first hall sensor 151 is away from the magnet 153, the second hall sensor 152 is close to the magnet 153, the magnetic field strength detected by the first hall sensor 151 is reduced, the output hall voltage is reduced, the magnetic field strength detected by the second hall sensor 152 is increased, and the output hall voltage is increased.

Since the position of the holding device 13 relative to the connecting rod 14 changes when the external force applied to the holding device 13 changes, i.e., the relationship between the speed of the user and the traveling speed of the main body 10 changes, the detection signal generated by the first detection device 15 changes. The control device 16 adjusts the acceleration of the driving motor 12 according to the different detection signals so as to adapt the speed of the main body 10 to the user speed. Taking the hall sensors 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 changes, so that the output hall voltage changes, and the controller controls the driving motor 12 according to the hall voltage output by the first hall sensor 151 and the second hall sensor 152.

As an alternative embodiment, a hall sensor is provided on the connecting rod 14 and a magnet 153 is provided on the holding device 13. That is, when the grip device 13 is displaced with respect to the link 14, the magnet 153 of the grip device 13 is also displaced with respect to the hall sensor of the link 14, the magnetic field detected by the hall sensor changes, the hall voltage output changes, and the control device 16 controls the drive motor 12 based on the hall voltage.

As a first variant, the first detection device 15 may be a photoelectric sensor and a light source which are mutually matched, the photoelectric sensor being arranged on the holding device 13, and the light source being arranged on the connecting rod 14. The number of the photosensors in this modified embodiment may be two, and the first photosensor and the second photosensor are both provided on the holding device 13, and the light source is provided on the connecting rod 14. When the holding device 13 is displaced relative to the connecting rod 14 in the direction of the main body 10, the first photoelectric sensor is close to the light source, the second photoelectric sensor is far away from the light source, the distance signal detected by the first photoelectric sensor is increased, and the distance signal detected by the second photoelectric sensor is decreased. When the holding device 13 is displaced relative to the connecting rod 14 in a direction away from the main body 10, the first photoelectric sensor is away from the light source, the second photoelectric sensor is close to the light source, the distance signal detected by the first photoelectric sensor is reduced, and the distance signal detected by the second photoelectric sensor is increased. That is, when the grip device 13 is displaced with respect to the connection rod 14, the distance signals output from the first and second photosensors change.

As an alternative embodiment, the photoelectric sensor is arranged on the connecting rod 14 and the light source is arranged on the holding device 13. That is, when the grip device 13 is displaced with respect to the link bar 14, the light source on the grip device 13 is also displaced with respect to the photosensor on the link bar 14, the distance signal detected by the photosensor changes, and the control device 16 controls the drive motor 12 based on the distance signal of the photosensor.

As a second variant, the first detection means 15 may be a potentiometer comprising an adjustment lever arranged on the gripping means 13 and a resistor arranged on the connecting rod 14, the gripping means 13 being displaced with respect to the connecting rod 14 while the adjustment lever is adjusted on the resistor. When the grip 13 is displaced relative to the connecting rod 14, the adjustment lever provided in the grip 13 is also displaced in the resistor provided in the connecting rod 14, the voltage signal output from the potentiometer is changed, and the control device 16 controls the drive motor 12 based on the voltage signal output from the potentiometer.

As an alternative, the adjustment lever is arranged on the connecting rod 14 and the resistor is arranged on the gripping means 13. That is, the resistor of the grip device 13 is displaced relative to the adjustment lever of the link 14 while the grip device 13 is displaced relative to the link 14, that is, the resistance of the adjustment lever adjusts the resistor, and the voltage signal output from the potentiometer is changed, and the control device 16 controls the drive motor 12 based on the voltage signal output from the potentiometer.

In addition to the hall sensor, the photoelectric sensor, and the potentiometer, other electronic components having the same function may be used as the first detection device 15, and the object of the present invention can be achieved as long as an electric signal can be generated based on a change in the position of the grip device 13 with respect to the connection rod 14.

In the present embodiment, the holding device 13 has a plurality of different position regions with respect to the connecting rod 14, each position region corresponds to a different acceleration of the drive motor 12, and the acceleration of the drive motor 12 in each position region is the same. That is, when the grip device 13 is displaced within a single position range, the acceleration of the drive motor 12 is kept constant, and when the grip device is displaced across the position range, the acceleration of the drive motor 12 is changed.

Taking the hall sensors as examples, in practical applications, when the hall voltages output by the first hall sensor 151 and the second hall sensor 152 are within a certain variation range, it can be determined that the holding device 13 is located in the same position region with respect to the connecting rod 14, the control device 16 controls the acceleration of the driving motor 12 to be constant, and when the hall voltages output by the first hall sensor 151 and the second hall sensor 152 exceed the variation range, it is determined that the holding device 13 is located in another position region with respect to the connecting rod 14, and the control device 16 controls the acceleration of the driving motor 12 to be varied.

Therefore, when the walking speed of the user changes, the position of the holding device 13 relative to the connecting rod 14 changes, 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 can adjust the acceleration of the driving motor 12 according to the detection signal of the first detection device 15, namely, the control device 16 can adjust the acceleration of the driving motor 12 according to the walking speed of the user, so that the speed of the hand-push mower is adapted to the speed of the user.

In addition, since the acceleration of the drive motor 12 differs for each position region, the acceleration of the drive motor 12 is the same for each position region. Therefore, in practical applications, even if the gripping device 13 shakes, the acceleration of the driving motor 12 remains stable as long as it is located in the same position region, that is, the speed is still in a state of a smooth increase or decrease or no change. In addition, when the position region is changed, only at the moment of the change, the acceleration of the drive motor 12 is changed, and the speed change that the user can actually feel is small.

As an alternative embodiment, the acceleration of the drive motor 12 is increased or decreased in the arrangement direction of the respective position areas. That is, the acceleration of the driving motor 12 has a certain linear relationship with the change of the position area of the holding device 13, so that the change of the acceleration of the driving motor 12 is relatively stable without sudden change, and the use stability of the hand-push mower is improved.

As an alternative embodiment, the acceleration of the driving motor 12 increases when the holding device 13 is displaced in a direction approaching the main body 10, and the acceleration of the driving motor 12 decreases when the holding device 13 is displaced in a direction away from the main body 10. When the grip 13 is displaced in a direction approaching the main body 10, that is, the user's walking speed is greater than the traveling speed of the main body 10, the control device 16 controls the acceleration of the driving motor 12 to be increased incrementally, which helps the traveling speed of the main body 10 to be smoothly increased to the user's walking speed. When the grip 13 is displaced away from the main body 10, that is, the walking speed of the user is lower than the traveling speed of the main body 10, the control device 16 controls the acceleration of the driving motor 12 to be decreased, which helps the traveling speed of the main body 10 to be smoothly decreased to the walking speed of the user.

As an alternative embodiment, as shown in fig. 3, the position region includes a speed stabilization region 18, when the holding device 13 is not subjected to an external force, the holding device 13 and the connecting rod 14 are automatically in an initial stable state under the action of the elastic assembly 100, and at this time, the holding device 13 is located at a middle position of the speed stabilization region 18 relative to the connecting rod 14, and the acceleration of the driving motor 12 is 0. When the holding device 13 is located in the speed stabilizing area 18 relative to the connecting rod 14, the acceleration of the driving motor 12 is set to 0, that is, the traveling speed of the traveling roller 11 is kept constant, and at this time, the user only needs to hold the holding device 13 without providing a pushing force to the holding device 13, so that the holding device 13 is kept in the current position area, and the speed of the main body 10 can be kept constant. Even if the grip device 13 is accidentally shaken and displaced forward and backward with respect to the link 14, the traveling speed of the main body 10 is kept constant as long as it is located in the position region, and the stability is good.

As an alternative embodiment, as shown in fig. 3, the location area includes an acceleration area 19 and a deceleration area 20 distributed on both sides of the speed stabilization area 18, the speed stabilization area 18 can enter the acceleration area 19 when the holding device 13 is displaced toward the main body 10 by an external force, and the speed stabilization area 18 can enter the deceleration area 20 when the holding device 13 is displaced away from the main body 10 by an external force. The acceleration of the drive motor 12 is greater than 0 when the gripping device 13 is located in the acceleration region 19 with respect to the connecting rod 14, and the acceleration of the drive motor 12 is less than 0 when the gripping device 13 is located in the deceleration region 20 with respect to the connecting rod 14. In this embodiment, the accelerating region 19 is located on the side of the speed stabilizing region 18 close to the main body 10, and the decelerating region 20 is located on the side of the speed stabilizing region 18 far from the main body 10. In practice, when the gripping device 13 is located in the acceleration region 19 with respect to the connecting rod 14, the acceleration of the drive motor 12 is greater than 0, i.e. the travel roller 11 accelerates, whereas, when the gripping device 13 is located in the deceleration region 20 with respect to the connecting rod 14, the acceleration of the drive motor 12 is less than 0, i.e. the travel roller 11 decelerates.

As an alternative embodiment, the acceleration region 19 may further include a plurality of sub acceleration regions, the acceleration of the driving motor corresponding to each sub acceleration region is different, and the deceleration region 20 may further include a plurality of sub deceleration regions, the acceleration of the driving motor corresponding to each sub deceleration region is different. That is, by providing the sub acceleration region and the sub deceleration region having different accelerations, it is possible to further adapt to the varying walking speed of the user, and to improve the degree of automation of the lawnmower.

As a further alternative embodiment, the acceleration region 19 includes a first sub-acceleration region 191 and a second sub-acceleration region 192, and the first sub-acceleration region 191 is located between the second sub-acceleration region 192 and the speed stabilization region 18. When the holding device 13 is displaced toward the main body 10, the holding device passes through the first sub acceleration region 191 and the second sub acceleration region 192 in sequence, and the acceleration of the corresponding driving motor 12 when the holding device 13 is located in the first sub acceleration region 191 is smaller than the acceleration of the corresponding driving motor 12 when the holding device 13 is located in the second sub acceleration region 192. That is, the acceleration region 19 of the main body 10 is further divided so that the acceleration increases in a certain level after the grip device 13 passes over the steady speed region 18 and reaches the acceleration region 19, and the main body 10 can be accelerated smoothly.

The deceleration zone 20 includes a first sub-deceleration zone 201 and a second sub-deceleration zone 202, and the first sub-deceleration zone 201 is located between the second sub-deceleration zone 202 and the speed stabilization zone 18. When the holding device 13 is displaced in a direction away from the main body 10, the holding device 13 sequentially passes through the first sub deceleration area 201 and the second sub deceleration area 202, and the acceleration of the corresponding driving motor 12 when the holding device 13 is located in the first sub deceleration area 201 is greater than the acceleration of the corresponding driving motor 12 when the holding device 13 is located in the second sub deceleration area 202. That is, the deceleration section 20 of the main body 10 is further divided so that the acceleration is reduced in a certain level after the grip 13 reaches the deceleration section 20 from the constant velocity section 18, and the main body 10 can be decelerated smoothly.

The magnitude of the acceleration of each sub acceleration region and sub deceleration region may be set according to actual requirements, as long as monotonicity is satisfied, and no limitation is made herein.

In this embodiment, the acceleration area 19 may be subdivided separately, the deceleration area 20 may be subdivided separately, the acceleration area 19 and the deceleration area 20 may be subdivided simultaneously, and the setting may be performed according to actual requirements.

The control device 16 actually controls the drive motor 12 by adjusting the voltage of the drive motor 12, and thus the rotational speed thereof, and by adjusting the acceleration thereof by program setting.

As an optional implementation manner, the hand-push mower in this embodiment further includes a second detection device, and the second detection device is respectively connected to the driving motor 12 and the control device 16, and is used for detecting the speed of the driving motor 12 and feeding back the speed to the control device 16. The control device 16 is also used to adjust the speed of the drive motor 12 in accordance with feedback information from the second control device 16. The second detection device is a speed sensor, and feedback information is provided for the control device 16 through the speed sensor, so that the adjustment accuracy of the control device 16 can be improved.

As an alternative embodiment, as shown in fig. 2, the hand-push mower further comprises a locking button 17, and the locking button 17 can be used for fixing the holding device 13 and the connecting rod 14 so that the relative positions of the holding device 13 and the connecting rod 14 are kept unchanged. Therefore, when the holding device 13 is in the speed stabilizing area 18, the holding device 13 and the connecting rod 14 can be fixed through the locking button 17, so that the position of the holding device 13 relative to the connecting rod 14 is kept unchanged, the holding device is always in the speed stabilizing area 18, and the speed of the driving motor 12 is kept stable. Before the hand-push mower is started, the holding device 13 and the connecting rod 14 can be fixed through the locking button 17 according to requirements.

The embodiment also provides a control method of the hand-push mower, which comprises the following steps:

step S10, the position of the gripping device relative to the connecting rod is detected by the first detecting device. For how the first detecting device detects the position of the holding device relative to the connecting rod, please refer to the above description of the mowing machine, which is not described herein.

In step S11, the control device adjusts the acceleration of the drive motor based on the position of the gripping device relative to the brace bar, the gripping device having a plurality of different position regions relative to the brace bar, each position region corresponding to a different acceleration of the drive motor. For the control of the driving motor and the position area by the control device, please refer to the above description of the hand-push mower, which is not repeated herein.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A hand propelled lawn mower, comprising:

a main body;

a travel roller connected with the main body;

the control device is respectively connected with the first detection device and the driving motor and is used for adjusting the acceleration of the driving motor according to the position of the holding device relative to the connecting rod;

2. The hand-propelled mower of claim 1, wherein the acceleration zone comprises a plurality of sub-acceleration zones, each of the sub-acceleration zones having a different acceleration of the drive motor, and the deceleration zone comprises a plurality of sub-deceleration zones, each of the sub-deceleration zones having a different acceleration of the drive motor.

3. The hand mower of claim 2, wherein the acceleration zone comprises a first sub acceleration zone and a second sub acceleration zone, wherein the acceleration of the corresponding drive motor is less when the holding device is located in the first sub acceleration zone than when the holding device is located in the second sub acceleration zone, and wherein the first sub acceleration zone is located between the second sub acceleration zone and the speed stabilization zone.

4. The hand-propelled mower according to claim 2, wherein said deceleration zone comprises a first sub-deceleration zone and a second sub-deceleration zone, wherein the acceleration of the corresponding drive motor is greater when said holding device is located in said first sub-deceleration zone than when said holding device is located in said second sub-deceleration zone, and wherein said first sub-deceleration zone is located between said second sub-deceleration zone and said speed stabilization zone.

5. A hand-propelled lawn mower as claimed in claim 1, further comprising:

the control device is also used for adjusting the speed of the driving motor according to the feedback information of the second detection device.

6. A hand-propelled lawn mower as claimed in claim 1, wherein said first sensing means comprises a cooperating hall sensor and magnet.

7. The hand-propelled mowing machine according to claim 6, wherein the hall sensor is disposed on the holding device, and the magnet is disposed on the connecting rod;

8. The hand-propelled mower according to claim 1, wherein said first detecting means comprises a photo sensor and a light source cooperating with each other, said photo sensor being disposed on said holding means, said light source being disposed on said connecting rod; or, the photoelectric sensor is arranged on the connecting rod, and the light source is arranged on the holding device.

9. The hand-propelled mower according to claim 1, wherein said first detecting means is a potentiometer including an adjusting lever and a resistor, said adjusting lever being disposed on said holding means, said resistor being disposed on said connecting rod; or, the adjusting rod is arranged on the connecting rod, and the resistor is arranged on the holding device.

10. The hand-pushed mower according to claim 1, further comprising an elastic assembly, wherein the elastic assembly is arranged between the holding device and the connecting rod, and the holding device is automatically located in the middle of the speed stabilizing area under the action of the elastic assembly when the holding device is not subjected to external force.