CN208191638U - A kind of energy saving grass trimmer improved service life - Google Patents
A kind of energy saving grass trimmer improved service life Download PDFInfo
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- CN208191638U CN208191638U CN201820766225.1U CN201820766225U CN208191638U CN 208191638 U CN208191638 U CN 208191638U CN 201820766225 U CN201820766225 U CN 201820766225U CN 208191638 U CN208191638 U CN 208191638U
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Abstract
A kind of energy saving grass trimmer improved service life; including an operating stick; described operating stick one end is equipped with battery; the other end is then equipped with the driving motor for driving a cutting tool to rotate; above-mentioned energy conservation grass trimmer further includes a control device, and the control device includes starter, overcurrent protection switch, voltage regulation unit, Overvoltage protecting unit, over-current protecting unit, PWM control unit, driving unit and display unit.The utility model can set the driving motor revolving speed under idling mode first with PWM control unit, the driving unit exports the fixation average voltage after pulse wave width modulation, and driving motor is promoted to be maintained at the idling mode for being not enough to carry out the slow-speed of revolution of cutting operation, and in operating process, if controlling driving motor moment improves revolving speed, it can prevent the output voltage of battery from generating violent variation, so that battery be substantially improved and use cruise duration.
Description
Technical field
The utility model relates to a kind of grass trimmers, refer in particular to a kind of energy saving grass trimmer improved service life.
Background technique
Grass trimmer is also known as brush cutter, weeder, grass mower, lawn mower etc., grass trimmer be it is a kind of for cutting the grass on a lawn,
The machine tool of vegetation etc..Development of Agricultural Mechanization, raising working efficiency, raising agricultural production efficiency are very important.It cuts
Tool of the careless machine as important role in agricultural production, has the yield of crops and most directly affects, its invention is
One much progress of human civilization.Grass trimmer is using relatively broad, and type is also more, wherein substantially can be divided into power-operated mower and combustion
Oily grass trimmer.Power-operated mower is since noise is small and energy conservation and environmental protection is thus liked by the majority of consumers.
For now, most power-operated mower not can control battery and carry out stablizing output appropriate, and nothing on the market
Method adjusted for the turf type for being intended to trim or cut off control motor revolving speed, when the charge capacity of battery is higher, i.e., with
Higher voltage promotes motor to make high speed rotation, if being intended to the turf trimmed or cut off does not have to so high revolving speed, that is, causes electricity
The waste of pond electric power, not only shorten power-operated mower uses cruise duration, more significantly reduces the service efficiency of battery.
Utility model content
The utility model provides a kind of energy saving grass trimmer improved service life, and main purpose is to overcome existing electronic
The defect that cruise duration existing for grass trimmer is short, battery availability factor is low.
In order to solve the above technical problems, the utility model adopts the following technical solution:
A kind of energy saving grass trimmer improved service life, including an operating stick, described operating stick one end are equipped with battery, separately
One end is then equipped with the driving motor for driving a cutting tool to rotate, and above-mentioned energy conservation grass trimmer further includes a control device, institute
Stating control device includes starter, overcurrent protection switch, voltage regulation unit, Overvoltage protecting unit, over-current protecting unit, PWM control
Unit, driving unit and display unit, the starter are installed in the operating stick and are electrically connected to the output end of battery,
So that control opens and closes the power supply of each load；The overcurrent protection switch is series between battery and driving motor, the overload
Protective switch be one with non-demolition characteristic no-fuse switch protector, in occur current overload abnormal conditions under, i.e.,
Execute the de-energizing actions of contact escape, the overcurrent protection switch is simultaneously equipped with the reset button that is installed in operating stick, with for
After abnormal conditions exclude, overcurrent protection switch can be reopened；The voltage regulation unit is connected to the output end of overcurrent protection switch,
To input the voltage of battery, and an exportable burning voltage；The Overvoltage protecting unit utilizes the stabilization of voltage regulation unit output
Voltage generates reference voltage value in a manner of dividing, and can separately sense the sensing voltage value of battery output voltage, and with the reference
Voltage value is compared with sensing voltage value carries out voltage quasi position, when sensing voltage value is higher than reference voltage value, i.e. control output
The signal of voltage high levle then controls the signal of output voltage low level when sensing voltage value is lower than reference voltage value；It is described
Over-current protecting unit can sense the sensing current value that battery is attracted and exported, and with the current value and a preset reference
Current value carries out the comparison of current value, when sensing current value higher than reference current value, that is, controls the letter of output off current HIGH level
Number, when sensing current value lower than reference current value, then control the signal of output electric current low level；The PWM control unit is used
In the electric current low level signal of the voltage high levle signal and over-current protecting unit output that receive Overvoltage protecting unit output, and root
Pulse wave width modulation signal is exported according to received signal；The driving unit is a power crystal, power input connection
In the output end of overcurrent protection switch, output end is then connected to driving motor, and another signal input part receives the output of PWM control unit
Pulse wave width modulation signal, for controlling the length in driving unit triggered time, and the control in the way of pulse wave width modulation
Driving unit output pulse wave electric voltage processed drives driving motor rotation, and then controllable driving motor is maintained at the idling shape of the slow-speed of revolution
State.
Further, the display unit is installed in operating stick, and is equipped with and can be shown that voltage normal first is aobvious respectively
Show the 4th display component of component, the second display component of undertension, the third display component of overcurrent and idling mode.
Further, the bottom of the operating stick is equipped with a protection lid.
Further, the battery is nickel-metal hydride battery, alkaline battery, nickel-cadmium cell, lithium battery or lithium polymer battery.
Further, the axle center distance length of the cutting tool and the driving motor is less than 50 centimetres.
Compared to the prior art, the beneficial effect that the utility model generates is:
The utility model structure is simple, practical, by the way that PWM control unit is arranged, can set idling shape first with it
Driving motor revolving speed under state, the driving unit exports the fixation average voltage after pulse wave width modulation, and promotes
Driving motor is maintained at the idling mode for being not enough to carry out the slow-speed of revolution of cutting operation, and the display unit receives idling shape
The signal of state, and trigger display component and display component according to received signal, to carry out, display voltage is normal and idling shape
State, and in operating process, if control driving motor moment improves revolving speed, it can prevent the output voltage of battery from generating violent
Variation, so that battery be substantially improved and using cruise duration.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the functional block diagram of control device described in the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clear, complete description, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Figures 1 and 2.A kind of energy saving grass trimmer 1 improved service life, including an operating stick 2, the operating stick 2
One end is equipped with battery 3, and the other end is then equipped with the driving motor 4 for driving a cutting tool 5 to rotate, above-mentioned energy conservation grass trimmer
1 further includes a control device 6, and the control device 6 includes starter 60, overcurrent protection switch 61, voltage regulation unit 62, over-voltage guarantor
Unit 63, over-current protecting unit 64, PWM control unit 65, driving unit 66 and display unit 67 are protected, the starter 60 is installed
In in the operating stick 2 and being electrically connected to the output end of battery 3, so that control opens and closes the power supply of each load；The overload is protected
Shield switch 61 is series between battery 3 and driving motor 4, and the overcurrent protection switch 61 is a nothing with non-demolition characteristic
Fuse-switch protector, under the abnormal conditions that current overload occurs, that is, to execute the de-energizing actions of contact escape, the overload
Protective switch 61 simultaneously can reopen overload after excluding for abnormal conditions equipped with the reset button being installed in operating stick 2
Protective switch 61；The voltage regulation unit 62 is connected to the output end of overcurrent protection switch 61, to input the voltage of battery 3, and
An exportable burning voltage；The Overvoltage protecting unit 63 is generated in the way of dividing by the burning voltage that voltage regulation unit 62 exports
Reference voltage value can separately sense the sensing voltage value of 3 output voltage of battery, and with the reference voltage value and sensing voltage value
The comparison for carrying out voltage quasi position controls the signal of output voltage high levle when sensing voltage value is higher than reference voltage value, when
When sensing voltage value is lower than reference voltage value, then the signal of output voltage low level is controlled；The over-current protecting unit 64 can be felt
The sensing current value that battery 3 is attracted and exported is surveyed, and electric current is carried out with the current value and a preset reference current value
The comparison of value controls the signal of output off current HIGH level when sensing current value higher than reference current value, when sensing current value
When lower than reference current value, then the signal of output electric current low level is controlled；The PWM control unit 65 is for receiving overvoltage protection
The electric current low level signal that the voltage high levle signal and over-current protecting unit 64 that unit 63 exports export, and it is received according to institute
Signal exports pulse wave width modulation signal；The driving unit 66 is a power crystal, and power input is connected to overload and protects
The output end of switch 61 is protected, output end is then connected to driving motor 4, and another signal input part receives what PWM control unit 65 exported
Pulse wave width modulation signal, for controlling the length in 66 triggered time of driving unit, and the control in the way of pulse wave width modulation
Driving unit 66 processed exports pulse wave electric voltage and driving motor 4 is driven to rotate, and then controllable driving motor 4 is maintained at the idle of the slow-speed of revolution
Fast state.
Referring to Figures 1 and 2.The display unit 67 is installed in operating stick 2, and is equipped with and can be shown that respectively voltage is normal
First display component, the second display component of undertension, the third display component of overcurrent and idling mode it is the 4th aobvious
Show component.
Referring to Figures 1 and 2.The bottom of the operating stick 2 is equipped with a protection lid 8.,
Referring to Figures 1 and 2.The battery 3 is nickel-metal hydride battery, alkaline battery, nickel-cadmium cell, lithium battery or lighium polymer
Battery.The axle center distance length of the cutting tool 5 and the driving motor 4 is less than 50 centimetres.
Referring to Figures 1 and 2.Above-mentioned overcurrent protection switch 61 is series between battery 3 and driving motor 4, which protects
Protect switch 61 can for one with non-demolition characteristic no-fuse switch protector, in generation current overload abnormal conditions under,
Execute the de-energizing actions of contact escape；The voltage regulation unit 62 is connected to the output end of overcurrent protection switch 61, is stored with inputting
The voltage (Vbb) of battery 3, and an exportable burning voltage (Vcc)；The Overvoltage protecting unit 63 is exported using voltage regulation unit 62
Burning voltage (Vcc) reference voltage value (Vref) is generated in a manner of dividing, can separately sense 3 output voltage of battery (Vbb)
Sensing voltage value (Vbb1), and the ratio of voltage quasi position is carried out with the reference voltage value (Vref) and sensing voltage value (Vbb1)
Compared with, when sensing voltage value (Vbb1) be higher than reference voltage value (Vref) when, that is, control output voltage high levle signal, work as sensing
When voltage value (Vbb1) is lower than reference voltage value (Vref), then the signal of output voltage low level is controlled；The overcurrent protection list
Member 64 can sense the sensing current value (Im) that battery 3 is attracted and exported, and with the current value (Im) and a preset ginseng
The comparison that current value (Iref) carries out current value is examined to control when sensing current value (Im) higher than reference current value (Iref)
The signal of output off current HIGH level then controls output electric current when sensing current value (Vbb1) lower than reference current value (Iref)
The signal of low level；The PWM control unit 65 is connected with the first adjustment component being installed in operating stick 2 and second adjustment
Component, the first adjustment component and second adjustment component are variable resistance, and by adjusting changing the first adjustment component and the
The resistance value of two adjustment components can separately be connect so that the duration of adjustment output pulse wave electric voltage high levle and low level is set separately
Receive the voltage high levle signal that Overvoltage protecting unit 63 exports and the electric current low level signal that over-current protecting unit 64 exports, and root
Pulse wave width modulation signal is exported according to received signal；The driving unit 66 is a power crystal, and power input connects
It is connected to the output end of overcurrent protection switch 61, output end is then connected to driving motor 4, and it is single that another signal input part receives PWM control
The pulse wave width modulation signal of 65 output of member, for controlling the length in 66 triggered time of driving unit, and utilizes pulse bandwidth tune
The mode of change controls the output pulse wave electric voltage of driving unit 66 and driving motor 4 is promoted to rotate, and then controllable driving motor 4 is maintained at
The idling mode of the slow-speed of revolution, and the appropriate working speed of regulation driving motor 4 can be carried out；The display unit 67 is installed in operation
On bar 2, and it is equipped with and can shows voltage normal first display component, the second display component of undertension, overcurrent respectively
4th display component of third display component and idling mode, the voltage quasi position letter that another receivable Overvoltage protecting unit 63 exports
Number and the current level signal that exports of over-current protecting unit 64, and trigger first, second, third and fourth respectively according to received signal
Display component shown, so that user grasped battery 3 and driving motor 4 at any time operates with state.
Referring to Figures 1 and 2.The present embodiment first with the PWM control unit 65 of the control device 6 before use, can set
Determine 4 revolving speed of driving motor under idling mode, the first adjustment component of PWM control unit 65 is fixed, and sets adjustment the
For two adjustment components to minimum value, the driving unit 66 exports the fixation average voltage after pulse wave width modulation, and promotees
Driving motor 4 is set to be maintained at the idling mode for being not enough to carry out the slow-speed of revolution of cutting operation, and the display unit 67 receives
The signal of idling mode, and display component and display component are triggered according to received signal, with carry out display voltage it is normal and
Idling mode, and in operating process, if control 4 moment of driving motor improves revolving speed, the output voltage of battery 3 can be prevented
Violent variation is generated, so that battery be substantially improved and use cruise duration.
Referring to Figures 1 and 2.For the present embodiment when carrying out cutting operation, operator can be directed to the type of various turfs, and sharp
The appropriate working speed that regulation driving motor 4 is carried out with the PWM control unit 65 of the control device 6, in the first adjustment group
In the case that part remains unchanged, by adjusting the length of time of second adjustment component, i.e., the output of changeable PWM control unit 65
The duty cycle of pulse wave, and change the actual average voltage of supply driving motor 4, and become by the height of actual average voltage
Change, the appropriate working speed of regulation driving motor 4 can be carried out, the output of driving unit 66 is controlled in a manner of pulse wave width modulation
Pulse wave electric voltage, and driving motor 4 is promoted to rotate with working speed appropriate, for carrying out cutting operation, and utilize pulse wave wide
Degree modulation mode controls output pulse wave electric voltage and driving motor 4 is promoted to rotate, and can not only extend using cruise duration, and can make to drive
Dynamic 4 revolving speed of motor can be held in for a long time to be allowed in working range, and then reaches the practical mesh that battery availability factor is substantially improved
's；Separately in course of normal operation, the Overvoltage protecting unit 63 of the control device 6 is the sense for carrying out sensing battery 3 and exporting
It surveys voltage value (Vbb1), and is compared with reference voltage value (Vref), and over-current protecting unit 64 also carries out sensing storage simultaneously
The sensing current value (Im) that battery 3 exports, and be compared with reference current value (Iref), when the sensing of Overvoltage protecting unit 63
Voltage value (Vbb1) is higher than reference voltage value (Vref), i.e. the signal of output voltage high levle to PWM control unit 65 and mistake
When flowing the sensing current value (Im) of protection location 64 lower than reference current value (Iref), that is, export the signal of electric current low level extremely
PWM control unit 65, the PWM control unit 65 persistently export pulse wave width modulation signal according to received signal, with
Control driving unit 66 exports pulse wave electric voltage and driving motor 4 is promoted to rotate, for carrying out cutting operation.
Referring to Figures 1 and 2.It in the present embodiment, will if the cutter that power-operated mower 1 occurs is snarled and stopped by grass
Will lead to driving motor 4 can not be successfully rotation, at this point, driving motor 4 in order to overcome this one hinder, it will always increase input electricity
Stream, improves output torque, is hindered with overcoming, if general is so that load current appearance is different however, this situation fails to exclude as early as possible
It often improves, and then in current overload condition occurs, the over-current protecting unit 64 of the control device 6, which can sense, compares electric power storage
The sensing current value (Im) that pond 3 exports is higher than the abnormal conditions of reference current value (Iref), at this point, the PWM control unit 65
It will be reset in time, and stop output pulse wave width modulation signal, the driving unit 66 also stops output pulse wave electric voltage and promotes
Driving motor 4 rotates, and achievees the purpose that overload protection, and the another display unit 67 is to receive what over-current protecting unit 64 exported
Electric current high levle signal, and display component is triggered according to received signal and carries out display current overload condition, user can root
It according to situation shown by display unit 67, gets obstacles out of the way, if current overload condition occurs, and over-current protecting unit 64 is not
When movement, the de-energizing actions of contact escape are also executed using the overcurrent protection switch 61.
Referring to Figures 1 and 2.In the present embodiment, the electric power of battery 3 is gradually consumed, when Overvoltage protecting unit 63
Sensing voltage value (Vbbl) when being lower than reference voltage value (Vref), the Overvoltage protecting unit 63 is output voltage low level
Signal at this point, the PWM control unit 65 will be reset in time, and stops output pulse wave width modulation signal, and the driving is single
Member 66 also stops output pulse wave electric voltage and driving motor 4 is promoted to rotate, to prevent 3 over-discharge of battery, the display unit 67
The voltage low level signal that Overvoltage protecting unit 63 exports is received, and display component is triggered according to received signal and is shown
Show undertension situation, user can the situation according to display unit 67, battery 3 is removed, and charges, and
It can reach the purpose for extending 3 service life of battery.
A kind of energy saving grass trimmer 1 improved service life provided by the utility model is described in detail above.
Specific case used herein is expounded the principles of the present invention and embodiment, and the explanation of above embodiments is only
It is the method and its core concept for being used to help understand the utility model.It should be pointed out that for the ordinary skill of the art
For personnel, without departing from the principle of this utility model, several improvements and modifications can be made to this utility model,
Modifications and modifications also fall within the protection scope of the claims of the utility model.
Claims (5)
1. a kind of energy saving grass trimmer improved service life, including an operating stick, described operating stick one end is equipped with battery, another
End is then equipped with the driving motor for driving a cutting tool to rotate, it is characterised in that: further includes a control device, the control
Device includes starter, overcurrent protection switch, voltage regulation unit, Overvoltage protecting unit, over-current protecting unit, PWM control unit, drives
Moving cell and display unit, the starter are installed in the operating stick and are electrically connected to the output end of battery, for control
System opens and closes the power supply of each load；The overcurrent protection switch is series between battery and driving motor, and the overload protection is opened
Guan Weiyi has the no-fuse switch protector of non-demolition characteristic, under the abnormal conditions that current overload occurs, that is, to execute and connect
The de-energizing actions of point escape, the overcurrent protection switch is simultaneously equipped with the reset button being installed in operating stick, for abnormal feelings
After condition excludes, overcurrent protection switch can be reopened；The voltage regulation unit is connected to the output end of overcurrent protection switch, with input
The voltage of battery, and an exportable burning voltage；The Overvoltage protecting unit using voltage regulation unit output burning voltage with
Partial pressure mode generates reference voltage value, can separately sense the sensing voltage value of battery output voltage, and with the reference voltage value
Compared with sensing voltage value carries out voltage quasi position, when sensing voltage value is higher than reference voltage value, i.e. control output voltage is high
The signal of level then controls the signal of output voltage low level when sensing voltage value is lower than reference voltage value；The overcurrent is protected
Shield unit can sense the sensing current value that battery is attracted and exported, and with the current value and a preset reference current value
The comparison for carrying out current value controls the signal of output off current HIGH level, works as sense when sensing current value higher than reference current value
When surveying current value lower than reference current value, then the signal of output electric current low level is controlled；The PWM control unit was for receiving
The voltage high levle signal of protection location output and the electric current low level signal of over-current protecting unit output are pressed, and according to being received
Signal export pulse wave width modulation signal；The driving unit is a power crystal, and power input is connected to overload and protects
The output end of switch is protected, output end is then connected to driving motor, and the pulse wave that another signal input part receives the output of PWM control unit is wide
Modulating signal is spent, for controlling the length in driving unit triggered time, and it is single that driving is controlled in the way of pulse wave width modulation
Member output pulse wave electric voltage drives driving motor rotation, and then controllable driving motor is maintained at the idling mode of the slow-speed of revolution.
2. a kind of energy saving grass trimmer improved service life as described in claim 1, it is characterised in that: the display unit installing
In in operating stick, and it is equipped with the second display component, excessively electric that can show normal first display component of voltage, undertension respectively
The third display component of stream and the 4th display component of idling mode.
3. a kind of energy saving grass trimmer improved service life as described in claim 1, it is characterised in that: the bottom of the operating stick
Equipped with a protection lid.
4. a kind of energy saving grass trimmer improved service life as described in claim 1, it is characterised in that: the battery is ni-mh
Battery, alkaline battery, nickel-cadmium cell, lithium battery or lithium polymer battery.
5. a kind of energy saving grass trimmer improved service life as described in claim 1, it is characterised in that: the cutting tool and institute
The axle center distance length of driving motor is stated less than 50 centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820766225.1U CN208191638U (en) | 2018-05-22 | 2018-05-22 | A kind of energy saving grass trimmer improved service life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820766225.1U CN208191638U (en) | 2018-05-22 | 2018-05-22 | A kind of energy saving grass trimmer improved service life |
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| Publication Number | Publication Date |
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| CN208191638U true CN208191638U (en) | 2018-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020186404A1 (en) * | 2019-03-15 | 2020-09-24 | 深圳拓邦股份有限公司 | Method, system and device for adjusting and controlling a mowing robot |
-
2018
- 2018-05-22 CN CN201820766225.1U patent/CN208191638U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020186404A1 (en) * | 2019-03-15 | 2020-09-24 | 深圳拓邦股份有限公司 | Method, system and device for adjusting and controlling a mowing robot |
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