CN102770247A - Power tools - Google Patents
Power toolsDownload PDFInfo
- Publication number
- CN102770247A CN102770247ACN2010800628523ACN201080062852ACN102770247ACN 102770247 ACN102770247 ACN 102770247ACN 2010800628523 ACN2010800628523 ACN 2010800628523ACN 201080062852 ACN201080062852 ACN 201080062852ACN 102770247 ACN102770247 ACN 102770247A
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- Prior art keywords
- power tool
- engine
- operation element
- speed
- power
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- 230000010354integrationEffects0.000claimsdescription7
- 238000000034methodMethods0.000claimsdescription7
- 239000000284extractSubstances0.000claimsdescription5
- 238000005259measurementMethods0.000claimsdescription5
- 230000000737periodic effectEffects0.000claimsdescription3
- 238000005520cutting processMethods0.000description9
- 230000036346tooth eruptionEffects0.000description4
- 210000000515toothAnatomy0.000description2
- 238000010586diagramMethods0.000description1
- 238000005265energy consumptionMethods0.000description1
- 238000000605extractionMethods0.000description1
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Classifications
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Harvester Elements (AREA)
- Portable Power Tools In General (AREA)
Abstract
Description
The present invention relates to power tool, especially electric tool such as but not limited to battery-operated power tool, comprises chain saw or hedge trimmer.
Power tool, and especially battery-operated electric tool (for example, hedge trimmer and chain saw) is being known in the art.They generally comprise be configured to engine be provided with power battery, be connected to operation element so that drive the engine of said operation element.One control element is set, so that control offers the power level of engine; This can be simple ON/OFF control or can carry out discontinuous control to voltage or the electric current that offers engine.For chain saw, operation element is the ring chain (chain) that has a plurality of sword teeth (bladed teeth), and for the hedge trimmer, the normally a pair of reciprocating blade of operation element.
Especially for battery-operated product, can the feedback of the efficient height of the power tool that is using about them be provided to the user is of great use.The electric weight that the battery storage is limited, and efficient the use time interval that has increased between the charging.In addition, the efficient use of power tool will reduce the idle of the heat that distributes in the battery and instrument, therefore improve the life-span of battery and the potentiality of other system.
According to a first aspect of the invention, a kind of power tool is provided, has comprised: operation element; Engine is configured to drive said operation element; And controller; Be configured to control the speed of the said operation element of said motor driven; Wherein, a sensor is provided, said sensor is used to indicate at least one factor (factor) of the efficient that power tool working; Said controller is configured to when said factor indication power tool is being worked with non-best mode, change the speed of the said operation element of said motor driven.
Thereby this provides feedback through the driven speed of operation element to the user.Through of the speed running of control engine, impel the user with mode operation tool more efficiently to revise.
Controller preferably is provided under the situation of power tool with non-best mode use, reduces the speed of motor driven operation element.Replacedly, controller can be configured to the said speed of periodic variation, so that to the user vibration is provided, perhaps can even increase said speed.
In a preferred embodiment, said at least one factor comprises the pressure the when user is applied to object to be operated with operation element.Thereby power tool can guide the user to use efficient pressure whereby.
The user who lacks experience uses its power tool with the mode of poor efficiency especially easily.Most of instruments have their speed with efficient operation that makes.When especially using chain saw, the user easier of lacking experience applies too big pressure on operation element; Because the cutting chain in the chain saw almost is self-feeding, the pressure that therefore increases generally can cause the loss of efficient.
Sensor can comprise the pressure sensor that is configured to measure use operation element time institute applied pressure.Yet, be that electric tool and said engine are under the situation of motor at said instrument, said sensor can comprise the current sensor that is configured to measure the electric current that flows through said engine.Therefore, the increase of electric current can be indicated and applied excessive pressure, and therefore said engine just is being operated in non-optimum state.Thereby when the electric current of current sensor measurement overstepped the extreme limit, controller can be configured to change the speed of (and normally reducing) motor driven operation element.
Said instrument can comprise power sensor, for example, current integration (integration) unit, said current integration unit carries out integration to the magnitude of current on the certain hour; This provides the convenient indication to the power that flows through engine; If just in consuming too much power, this indication engine or any battery maybe be overheated so.
Additionally or alternatively, sensor can comprise with in the lower sensor at least one: load transducer, and as a factor, said load transducer is configured to sensing load on the operation element when operation element operation object to be processed; Velocity sensor, as a factor, said velocity sensor is configured to the speed that sensing engine or operation element are being worked; Or temperature sensor, said temperature sensor is used for the temperature of the part (the for example engine of instrument or battery) of sensing instrument.
For the electric tool that engine is motor; Controller can comprise the variable power control element with input and output; Wherein said controller is configured to; If the factor indication power tool by sensor measurement is in non-optimum operation, power control member reduces to be delivered to from input the power of output so.For example, power control member can comprise controllable variable resistor, thereby if confirm to be in non-optimum operation, for example, when the electric current through engine overstepped the extreme limit, controller increased said controllable variable-resistance resistance.
Thereby; Power tool can comprise power supply, velocity selector; Said velocity selector can and can be operable to from said power supply by the user of power tool operation and extract the signal of telecommunication that electric power and output indication user hope to operate the speed of said power tool, and the output of velocity selector is coupled to the input of power control member.Through simple ON/OFF control is provided, velocity selector can allow to select a plurality of discontinuous friction speeds, and for example, two different speed perhaps can provide continuous velocity interval, preferably include zero velocity.So controller provides feedback according to the speed that the user hopes.
Power tool can be a trimmer, hedge trimmer for example, and wherein operation element comprises at least one, but two reciprocating blades preferably.In a preferred embodiment, power tool is a chain saw, and wherein operation element comprises the ring chain that has a plurality of cutting teeths, around the length of ring chain by the said cutting teeth of motor driven.
Generally speaking, power tool is battery-operated electric tool, and wherein engine is a motor, and the power supply that wherein is used for engine is a battery.
According to a second aspect of the invention, a kind of method of operational power instrument is provided, said power tool comprises: operation element; Engine is configured to drive said operation element; And control element; Indicate the speed of hope through said control element user; Said method comprises at least one factor of the efficient that sensing indication power tool is being worked; When said factor indication power tool was being worked with non-best mode, said power tool was from the speed of the rapid change motor driven operation element of hope.
Thereby this provides feedback through the driven speed of operation element to the user.Through of the speed running of control engine, impel the user with mode operation tool more efficiently to revise.
The step of change speed preferably includes the speed that reduces the motor driven operation element.Replacedly, this step can comprise the said speed of periodic variation, so that to the user vibration is provided, perhaps can even comprise increasing said speed.
In a preferred embodiment, said at least one factor comprises the pressure the when user is applied to object to be operated with operation element.
But this pressure working pressure sensor comes sensing.Yet, be electric tool and said engine when being motor at said instrument, this pressure can come sensing through the electric current that engine is flow through in measurement.Therefore, the increase of electric current can be indicated and applied excessive pressure, and therefore engine just is being operated in non-optimum state.Thereby when the electric current of measuring overstepped the extreme limit, said method can comprise the speed of change (and normally reducing) motor driven operation element.
Additionally or alternatively; Said factor can comprise at least one in the following factor: the integration of the electric current of the temperature of the speed that load, engine or the operation element when operation element is operated object to be processed on the operation element worked, the battery of instrument, the temperature (thereby can confirm that instrument can be not overheated) of engine, engine extraction (drawn), the electric current that engine extracts or the power of engine consumes (the energy consumption of latter two factors indication engine, thereby but and marking tools maybe be overheated potentially).
Power tool can be a trimmer, hedge trimmer for example, and wherein operation element comprises at least one, but two reciprocating blades preferably.In a preferred embodiment, power tool is a chain saw, and wherein operation element comprises the ring chain that has a plurality of cutting teeths, around the length of ring chain by the said cutting teeth of motor driven.
Generally speaking, power tool is battery-operated electric tool, and wherein engine is a motor, and the power supply that wherein is used for engine is a battery.
Only embodiment of the present invention is described referring now to accompanying drawing with the mode of instance, in the accompanying drawing:
Fig. 1 shows the side view of the chain saw of first embodiment of the invention; And
Fig. 2 shows the circuit diagram of the circuit of chain saw in the control chart 1.
The chain saw of embodiment of the present invention shown in the drawings.It comprises the housing 1 that supports cutting element 2.Cutting element comprises long andnarrow support member 3, and the cutting chain 4 of annular extends on said support member.Cutting chain has cutting element on each chain link (link).
For driven cutting chain bar 4, in housing 1, be provided with battery 5 and engine 6 (the two is all shown in Fig. 2).When through battery 5 when engine provides electric current, engine 6 action is so thatdriving wheel 7 rotations, and therefore chain drive-belt 4 aroundsupport member 3.
The user is to utilize the control elementmain switch 8 that constitutes control element to the major control of chain saw operation.The user must push twopart 8a, the 8b of (squeeze) main switch, thereby so that allows electric current from battery 5 flow direction engines 6 and 4 cuttings of driven cutting chain bar.
Yet,, a feedback controller 9 is set for the user to chain saw 1 provides feedback.This comprises control circuit 10 and the variable resistor of being controlled by control circuit 10 11.Control circuit 10 will be connected the output of the current sensor 12 that is provided with engine as input; The electric current of engine 6 is flow through in said output indication.
As long as electric current remains in the predetermined limit normal, control circuit 10 is set variable resistor 11 for its minimum of a value so, and this can not flow by the power of appreciable impact from the battery to the engine; Thereby chain 4 will be driven at full speed.
Yet, if the user when using chain saw with chain saw over-compressed object to be cut, the load on the engine 6 will significantly increase so, therefore flow through the electric current increase of engine and current sensor 12.In case electric current reaches preestablished limit, control circuit 10 will instruct variable resistor 11 to be higher setting, and this will limit the power of flow direction engine 6, therefore reduce chain 4 driven speed.This can be easy to discovered by the user, and the user thinks to dub the signal of compacting with it.In case electric current is reduced to suitable rank (level), variable resistor will reduce to get back to minimal level, allow the user as normally, to continue.
A plurality of increased resistance ranks can be provided, and along with the further increase of electric current, chain slows down gradually.Replacedly, variable resistor can be disconnected (off) (if electric current in normal range (NR), resistance is substantially zero) or connect (on) (if electric current oversteps the extreme limit, using whole resistance).
Current sensor can comprise integral unit, thereby can measure the integration that on the regular hour window, flows through the electric current of engine 6 usually.This has provided the energy of engine 6 consumption or the measurement of power, thereby and if can be used for indicating power consumption excessive, possibly cause potential overheated situation.If this situation takes place, variable resistor 11 can be used for reducing the electric current of flow direction engine so, and the speed that reduces engine 6 thus cools down to allow it.
Therefore, this embodiment instruction user of the present invention operates its chain saw more efficiently, thereby improves the work that every watt-hour is accomplished that consumes.
Claims (11)
1. a power tool comprises: operation element (4); Engine (6) is configured to drive said operation element (4); And controller (9); Be configured to control the speed that said engine (6) drives said operation element (4); Wherein, a sensor (12) is provided, said sensor is used to indicate at least one factor of the efficient that said power tool working; Said controller (9) is configured to when said factor indicates said power tool working with non-best mode, change the speed that said engine (6) drives said operation element (4).
2. power tool according to claim 1, wherein, said controller (9) is provided under the situation of said power tool with non-best mode use, reduces the speed that said engine (6) drives said operation element (4).
3. power tool according to claim 1, wherein, said controller (6) is provided under the situation of said power tool with non-best mode use, and the said speed of periodic variation is so that provide vibration to the user.
4. according to the described power tool of arbitrary aforementioned claim, wherein, said at least one factor comprises the pressure the when user is applied to object to be operated with said operation element (4).
5. according to the described power tool of arbitrary aforementioned claim; Wherein, Said instrument is that electric tool and said engine (6) are motors, and wherein, said sensor (12) comprises the current sensor that is configured to measure the electric current that flows through said engine (6).
6. power tool according to claim 5, wherein, when the electric current of said current sensor (12) measurement overstepped the extreme limit, said controller (9) was configured to reduce the speed that said engine (6) drives said operation element (4).
7. according to the described power tool of arbitrary aforementioned claim, said power tool is an electric tool, and said engine (6) is a motor; Wherein, Said controller (9) comprises the variable power control element (11) with input and output, and wherein, said controller (9) is configured to; If the factor that said sensor (12) is measured indicates said power tool to be in non-optimum operation, so said power control member (11) reduces to be delivered to from said input the power of said output.
8. power tool according to claim 7; Wherein, Said power tool comprises power supply (5), velocity selector (8); Said velocity selector is by the user of said power tool operation and can be operable to from said power supply and extract the signal of telecommunication that electric power and output indication user hope to operate the speed of said power tool, and the output of said velocity selector (8) is coupled to the input of said power control member (11).
9. the method for an operational power instrument, said power tool comprises: operation element (4); Engine (6) is configured to drive said operation element (4); And control element (8); Indicate the speed of hope through said control element user; Said method comprises that sensing indicates at least one factor of the efficient that said power tool working; When said factor indicated said power tool working with non-best mode, said power tool drove the speed of said operation element (4) from the said engine of the rapid change of hope (6).
10. method according to claim 9, wherein, the step that changes speed comprises and reduces the speed that said engine (6) drives said operation element (4).
11. according to claim 9 or 10 described methods; Wherein, Said at least one factor comprises: the pressure the when user is applied to object to be operated with said operation element (4), the load when said operation element (4) operation object to be processed on the said operation element, or said engine (6) or said operation element (4) speed of working; The temperature of the battery of instrument (5); The temperature of said engine (6); The integration of the electric current that the electric current that said engine (6) extracts, said engine (6) extract, or the power that consumes of said engine (6).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2010/000973WO2011100988A1 (en) | 2010-02-17 | 2010-02-17 | Power tools |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102770247Atrue CN102770247A (en) | 2012-11-07 |
Family
ID=42634957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800628523APendingCN102770247A (en) | 2010-02-17 | 2010-02-17 | Power tools |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20130020102A1 (en) |
| EP (1) | EP2536536A1 (en) |
| JP (1) | JP5571805B2 (en) |
| CN (1) | CN102770247A (en) |
| WO (1) | WO2011100988A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108809201A (en)* | 2017-05-03 | 2018-11-13 | 布楼恩特公司 | Power adjustment motor control method |
| CN113875420A (en)* | 2021-09-27 | 2022-01-04 | 永康芯之鑫集成电路有限公司 | Electric hedge trimmer driving method for optimizing shearing effect |
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| US9780718B2 (en)* | 2010-11-02 | 2017-10-03 | Whirlpool Corporation | Portable appliance motor control with speed-based current limitation |
| AU2012352199B2 (en) | 2011-12-16 | 2017-08-17 | Stryker Corporation | Specimen trap with a removable catch tray for retrieving tissue samples from a fluid stream during a medical procedure |
| JP2014023271A (en)* | 2012-07-18 | 2014-02-03 | Hitachi Koki Co Ltd | Power-supply unit |
| JP6032400B2 (en)* | 2012-08-15 | 2016-11-30 | 日立工機株式会社 | Chainsaw |
| JP5935591B2 (en)* | 2012-08-20 | 2016-06-15 | 日立工機株式会社 | Hedge trimmer |
| FR3015567B1 (en)* | 2013-12-19 | 2015-12-25 | Turbomeca | DEVICE FOR DRAINING FLUIDS FOR AN AIRCRAFT ENGINE |
| EP3653139B1 (en) | 2014-10-30 | 2024-07-03 | Stryker Corporation | Surgical tool with an aseptic power module that enters a specific operating state based on the type of handpiece to which the module is attached |
| US9862116B2 (en) | 2014-11-20 | 2018-01-09 | Black & Decker Inc. | Dual speed gearboxes, transmissions, and apparatuses incorporating the same |
| EP3235119B1 (en) | 2014-12-18 | 2021-10-13 | Black & Decker Inc. | Control scheme to increase power output of a power tool using conduction band and advance angle |
| EP3370924B1 (en) | 2015-11-02 | 2021-05-05 | Black & Decker Inc. | Reducing noise and lowering harmonics in power tools using conduction band control schemes |
| KR101825351B1 (en)* | 2015-12-23 | 2018-02-05 | 영남이공대학교 산학협력단 | Portable electric sawing devices |
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| EP3634676B1 (en)* | 2017-06-09 | 2023-11-15 | Husqvarna Ab | Chainsaw and method |
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| WO2019168759A1 (en) | 2018-02-28 | 2019-09-06 | Milwaukee Electric Tool Corporation | Simulated bog-down system and method for power tools |
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| CN108809201B (en)* | 2017-05-03 | 2022-03-01 | 奥力根工具股份有限公司 | Power regulation motor control method |
| CN113875420A (en)* | 2021-09-27 | 2022-01-04 | 永康芯之鑫集成电路有限公司 | Electric hedge trimmer driving method for optimizing shearing effect |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5571805B2 (en) | 2014-08-13 |
| US20130020102A1 (en) | 2013-01-24 |
| EP2536536A1 (en) | 2012-12-26 |
| JP2013519535A (en) | 2013-05-30 |
| WO2011100988A1 (en) | 2011-08-25 |
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