阅读说明：本技术 一种割草机及防脱预警方法 (Mower and anti-falling early warning method ) 是由 冯继丰 于 2020-03-20 设计创作，主要内容包括：本发明公开了一种割草机及防脱预警方法,其属于园林设备领域,割草机包括机壳、马达、旋转装置、发射器、接收器和控制器,马达设置于机壳内,并具有输出轴；旋转装置设置于输出轴上,并由输出轴驱动旋转；发射器设置于机壳和旋转装置中的一个上；接收器设置于机壳和旋转装置中的另一个上,用于接收发射器发出的信号；控制器被配置为根据发射器与接收器之间的信号变化,获得旋转装置相对于机壳的状态变化。防脱预警方法包括：所述发射器向所述接收器发射信号；根据所述发射器与所述接收器之间的信号变化,判断所述旋转装置相对于所述机壳的状态变化；当所述状态变化超出预定值时,停机并报警。以便于及时处理故障,保障割草机安全性。(The invention discloses a mower and an anti-drop early warning method, belonging to the field of garden equipment, wherein the mower comprises a shell, a motor, a rotating device, a transmitter, a receiver and a controller, wherein the motor is arranged in the shell and is provided with an output shaft; the rotating device is arranged on the output shaft and is driven by the output shaft to rotate; the emitter is arranged on one of the shell and the rotating device; the receiver is arranged on the other one of the shell and the rotating device and is used for receiving the signal sent by the transmitter; the controller is configured to obtain a change in a state of the rotating device relative to the housing based on a change in a signal between the transmitter and the receiver. The anti-drop early warning method comprises the following steps: the transmitter transmits a signal to the receiver; judging the state change of the rotating device relative to the shell according to the signal change between the transmitter and the receiver; when the state change exceeds a preset value, stopping the machine and giving an alarm. So as to timely process faults and ensure the safety of the mower.)

1. A lawn mower, comprising:

a housing;

a motor disposed in the housing and having an output shaft;

the rotating device is arranged on the output shaft and is driven by the output shaft to rotate;

a transmitter disposed on one of the housing and the rotating device;

the receiver is arranged on the other one of the shell and the rotating device and is used for receiving the signal sent by the transmitter;

a controller configured to obtain a change in state of the rotating device relative to the housing based on a change in signal between the transmitter and the receiver.

2. The mower of claim 1 wherein the rotating means is a blade.

3. The mower of claim 1 wherein the rotating means is a fan.

4. A lawnmower according to any of claims 1 to 3, wherein the change in condition is axial distance and/or rotational speed.

5. The anti-drop warning method for the lawn mower according to claim 1, comprising the following steps:

the transmitter transmits a signal to the receiver;

the receiver receives the signal, and the state change of the rotating device relative to the shell is judged according to the signal change between the transmitter and the receiver;

when the state change exceeds a preset value, stopping the machine and giving an alarm.

6. The anti-drop pre-warning method according to claim 5, wherein the state change is an axial distance and/or a rotational speed.

7. The anti-drop early warning method according to claim 6, wherein the state change is an axial distance, the controller obtains a current axial distance value according to the signal change, and if the current axial distance value exceeds a preset axial distance range, the machine is shut down and an alarm is given.

8. The anti-drop early warning method according to claim 6, wherein the state change is a rotation speed, the controller obtains a current rotation speed value according to the signal change, and if the current rotation speed value is smaller than a preset rotation speed value, the machine is stopped and an alarm is given.

9. The anti-drop pre-warning method according to any one of claims 5 to 8, wherein the rotating device is a blade.

10. The anti-drop pre-warning method according to any one of claims 5 to 8, wherein the rotating device is a fan.

Technical Field

The invention relates to the field of garden equipment, in particular to a mower and an anti-falling early warning method.

Background

The mower is a mechanical tool for trimming lawn, vegetation and the like, and mainly comprises a chassis, an engine, traveling wheels, a traveling mechanism, a blade, a handrail and a control part. When the mowing machine is used, the blade is driven to rotate at a high speed by the engine so as to achieve the aim of mowing.

In the existing mower, the blade is only screwed and fixed through screws, and the screws are loosened due to vibration in the use process and unbalanced forces such as impact of vegetation on the blade, so that the blade may fall off to fly out under the action of inertia, and the safety of operators is threatened.

Disclosure of Invention

The invention aims to provide a mower and an anti-falling early warning method, and aims to solve the technical problem of potential safety hazards caused by falling of a blade in the prior art.

As the conception, the technical scheme adopted by the invention is as follows:

a lawn mower, comprising:

a housing;

a motor disposed in the housing and having an output shaft;

the rotating device is arranged on the output shaft and is driven by the output shaft to rotate;

a transmitter disposed on one of the housing and the rotating device;

the receiver is arranged on the other one of the shell and the rotating device and is used for receiving the signal sent by the transmitter;

a controller configured to obtain a change in state of the rotating device relative to the housing based on a change in signal between the transmitter and the receiver.

Wherein the rotating device is a blade.

Wherein the rotating device is a fan.

Wherein the state change is an axial distance and/or a rotational speed.

An anti-drop early warning method for a mower comprises the following steps:

the transmitter transmits a signal to the receiver;

the receiver receives the signal, and the state change of the rotating device relative to the shell is judged according to the signal change between the transmitter and the receiver;

when the state change exceeds a preset value, stopping the machine and giving an alarm.

Wherein the state change is an axial distance and/or a rotational speed.

And if the current axial distance value exceeds a preset axial distance range, stopping the machine and giving an alarm.

And if the current rotating speed value is smaller than a preset rotating speed value, stopping the machine and giving an alarm.

Wherein the rotating device is a blade.

Wherein the rotating device is a fan.

The invention has the beneficial effects that:

the mower provided by the invention is characterized in that the transmitter is arranged on one of the machine shell and the rotating device, the receiver is arranged on the other of the machine shell and the rotating device and used for receiving a signal sent by the transmitter, and the controller is configured to obtain the state change of the rotating device relative to the machine shell according to the signal change between the transmitter and the receiver. When the rotating device has a loosening or falling fault, the rotating device is convenient to process in time so as to ensure the safety.

The invention provides an anti-drop early warning method of a mower, which transmits a signal to a receiver through a transmitter, and judges the state change of a rotating device relative to a shell according to the signal change between the transmitter and the receiver; when the state change exceeds a preset value, the system is stopped and an alarm is given. When the rotating device is possible to loose or fall off, the machine is stopped and an alarm is given, so that the operator can conveniently and timely handle the machine, and the safety is guaranteed.

Drawings

FIG. 1 is a schematic structural diagram of a lawn mower according to an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the structure of the mower provided in FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is an enlarged view at A of FIG. 3;

FIG. 5 is an exploded view of the perspective of FIG. 2;

FIG. 6 is an exploded view of the alternate view of FIG. 2;

FIG. 7 is a schematic view of a part of a lawn mower according to a second embodiment of the present invention;

FIG. 8 is a cross-sectional view of FIG. 7;

fig. 9 is an enlarged view of fig. 8 at B.

In the figure:

10. a housing;

20. an output shaft;

30. a blade;

40. a fan;

50. a chassis;

60. a traveling wheel;

70. a handrail;

1. a transmitter;

2. a receiver.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Example one

Referring to fig. 1 to 6, an embodiment of the present invention provides a lawn mower, including a housing 10 for providing a supporting function and a rotating device capable of rotating relative to the housing 10, wherein a motor is arranged in the housing 10, the motor has an output shaft 20, and the rotating device is arranged on the output shaft 20 and driven to rotate by the output shaft 20. The housing 10 may be fixed to the motor housing as a whole or may be provided separately from the motor housing, as long as the housing 10 is fixed and the rotating device can rotate relative to the housing 10.

Of course, the mower further comprises a chassis 50, a traveling mechanism, traveling wheels 60 and a handrail 70, wherein the traveling mechanism drives the traveling wheels 60 to rotate, so that the mower can travel; the chassis 50 is connected with the road wheels 60, the motor is connected with the chassis 50, and the armrest 70 is arranged on the upper part of the chassis 50.

The rotating means may be a blade 30. When the output shaft 20 rotates, the blade 30 is driven to rotate, so as to realize the grass cutting function. In order to dissipate heat of the motor, a fan 40 is provided, the fan 40 is connected with the output shaft 20, and the fan 40 has blades to realize a heat dissipation function. The rotating means may also be a fan 40.

The mower further comprises a transmitter 1, a receiver 2 and a controller, wherein the transmitter 1 is arranged on one of the machine shell 10 and the rotating device, and the receiver 2 is arranged on the other of the machine shell 10 and the rotating device and used for receiving signals sent by the transmitter 1; the controller is configured to obtain a change in the state of the rotating device relative to the housing 10 from a change in the signal between the transmitter 1 and the receiver 2. When the rotating device has a loosening or falling fault, the rotating device is convenient to process in time so as to ensure the safety.

In the present embodiment, the rotating device is a fan 40. The blade 30 may be fixed integrally with the fan 40. The movement of the blade 30 is synchronized with the movement of the fan 40, and when the blade 30 is removed, the fan 40 is removed.

The transmitter 1 may be disposed on one blade of the fan 40, and cooperate with the receiver 2 on the casing 10 to detect a state change of the fan 40 relative to the casing 10. The receiver 2 may be disposed on one blade of the fan 40, and cooperate with the transmitter 1 on the casing 10 to detect a state change of the fan 40 relative to the casing 10.

The positions of the transmitter 1 and the receiver 2 correspond to each other, specifically: along the axial of output shaft 20, transmitter 1 and receiver 2 interval set up, along the radial of output shaft 20, transmitter 1 and receiver 2 just set up to the signal that sends can be received by receiver 2.

Specifically, be provided with first recess on the fan blade, emitter 1 is located first recess, and the position that corresponds with emitter 1 is provided with the second recess on casing 10, and receiver 2 is located the second recess for fan 40 rotates the round once, and receiver 2 can receive the signal that emitter 1 sent once.

The state of the rotating means relative to the casing 10 changes to the axial distance and/or the rotational speed. Since the fan 40 and the blades 30 are located at the bottom and the casing 10 is located at the upper part of the fan 40, the axial distance between the blades and the casing 10 should be a fixed value during the rotation of the fan 40, and if the axial distance suddenly increases, it indicates that the fan 40 loosens or falls off in the axial direction. The fan 40 and the output shaft 20 rotate synchronously, the rotating speed of the fan 40 is a fixed value in the rotating process, if the rotating speed changes, the fan 40 is indicated to be loosened or fall off relative to the output shaft 20, and the controller controls the motor to stop and give an alarm.

The embodiment of the invention also provides an anti-falling early warning method of the mower, which comprises the following steps:

the transmitter 1 transmits a signal to the receiver 2;

judging the state change of the rotating device relative to the shell 10 according to the signal change between the transmitter 1 and the receiver 2;

when the state change exceeds a preset value, the system is stopped and an alarm is given.

When the state change exceeds the preset value, namely the rotating device is possible to have a loosening or falling fault, the machine is stopped and an alarm is given, so that the operator can conveniently and timely handle the machine, and the safety is guaranteed.

The mower is internally provided with an alarm device electrically connected with a controller, the controller can receive signals between the emitter 1 and the receiver 2, and the alarm can be buzzer sound and/or lamplight flickering.

When the state changes into the axial distance, the current axial distance value is obtained through signal transmission between the transmitter 1 and the receiver 2, and if the current axial distance value exceeds the preset axial distance range, the machine is stopped and an alarm is given. Since the mower may vibrate with a certain amplitude during operation, the fan 40 is considered not to be loosened and fall off when the current axial distance value is within the preset axial distance range.

The current axial distance value exceeds a preset axial distance range, including:

the preset axial distance range has an axial distance lower limit value and an axial distance upper limit value, and if the current axial distance value is larger than the axial distance upper limit value, the current axial distance value exceeds the preset axial distance range.

And if the current axial distance value is between the lower axial distance limit value and the upper axial distance limit value, the current axial distance value is within the preset axial distance range.

And if the current axial distance value is smaller than the lower limit value of the axial distance, pushing fault prompt information. The current axial distance value is small, which may be due to the failure of the transmitter 1 and/or the receiver 2, and the detection result is inaccurate, so that failure processing is required. The pushed fault prompt information may be light flashing, voice, etc., and is not limited herein. The mower can be distinguished from different faults through different colors of lights.

When the state is changed into the rotating speed, the current rotating speed value is obtained through signal transmission between the transmitter 1 and the receiver 2, and if the current rotating speed value is smaller than the preset rotating speed value, the machine is stopped and an alarm is given. Since the rotation speed of the fan 40 is stable during the operation of the lawn mower, the fan 40 is considered to be loose or fall off when the current rotation speed value is seriously deviated from the preset rotation speed value. The preset rotational speed may also be a range, which will not be described in detail herein, since there is a small range of fluctuation in the rotational speed due to vibrations of the mower and collisions between the blade 30 and vegetation.

In the present embodiment, since the fan 40 is fixedly connected to the output shaft 20, the rotation speed of the fan 40 should be equal to the rotation speed of the output shaft 20, and therefore the preset rotation speed value is equal to the rotation speed value of the output shaft 20.

Of course, two state changes of the axial distance and the rotation speed can be detected simultaneously, and when one state change deviates from a preset value, the rotating device is considered to be loosened or fall off. The accuracy of the detection result is improved, so that the fault is found more timely and the safety is higher.

Example two

Fig. 7 to 9 show a second embodiment, wherein the same or corresponding parts as the first embodiment are provided with the same reference numerals as the first embodiment. For the sake of simplicity, only the differences between the second embodiment and the first embodiment will be described. The difference is that the rotating device is the blade 30, and here, the state change of the blade 30 relative to the casing 10 can be directly detected, which is more intuitive and accurate.

It is possible to provide a transmitter 1 on the blade 30, which cooperates with a receiver 2 on the housing 10 to detect a change in the condition of the blade 30 relative to the housing 10. Alternatively, the receiver 2 may be provided on the blade 30, and cooperate with the transmitter 1 on the housing 10 to detect a change in the state of the blade 30 with respect to the housing 10.

Specifically, a third groove is formed in the blade 30, the transmitter 1 is located in the third groove, a fourth groove is formed in the position, corresponding to the transmitter 1, of the machine shell 10, and the receiver 2 is located in the fourth groove, so that the receiver 2 can receive a signal sent by the transmitter 1 once when the blade 30 rotates for one circle.

The state of the rotating means relative to the casing 10 changes to the axial distance and/or the rotational speed. During the rotation of the blade 30, the axial distance between the blade 30 and the housing 10 should be a fixed value, and if the axial distance suddenly increases, the blade 30 is loosened or falls off in the axial direction. The blade 30 rotates synchronously with the output shaft 20, and the rotation speed of the blade 30 should be a constant value during the rotation process, and if the rotation speed changes, the blade 30 is loosened or falls off relative to the output shaft 20.

In this embodiment, the blade 30 may be directly and fixedly connected to the output shaft 20, or a speed reducing mechanism may be disposed between the blade and the output shaft 20, and a preset rotation speed value is set according to actual conditions. In this case, the fan 40 may be directly connected to the output shaft 20 or indirectly connected thereto, and is not limited thereto.

When the state change is the axial distance or the rotation speed, the anti-drop early warning method is the same as the first embodiment. Of course, it is also possible to detect both the changes in the state of the axial distance and the rotational speed, and when one of the changes deviates from the preset value, the blade 30 is considered to be loose or fall off. The accuracy of the detection result is improved, so that the fault is found more timely and the safety is higher.

The above embodiment only shows that the transmitter 1 and the receiver 2 are provided with one pair, and in the practical situation, the transmitter 1 and the receiver 2 can be provided with a plurality of pairs, so that a plurality of groups of parameters are obtained at each time, the inaccuracy of the detection result caused by the fault of one group of the transmitter 1 and the receiver 2 can be avoided, the accuracy of the detection result is further ensured, and the early warning timeliness is improved.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.