CN111702723B - Electric shock protection device of impulse-type lithium electric tool - Google Patents
Electric shock protection device of impulse-type lithium electric tool Download PDFInfo
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- CN111702723B CN111702723B CN202010571832.4A CN202010571832A CN111702723B CN 111702723 B CN111702723 B CN 111702723B CN 202010571832 A CN202010571832 A CN 202010571832A CN 111702723 B CN111702723 B CN 111702723B
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- output shaft
- assembly
- motor assembly
- electric
- lithium
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- 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
The invention discloses an electric shock protection device of a rush-rotating type lithium electric tool, which comprises a motor assembly, a drill chuck assembly, an output shaft assembly and a control panel, wherein the control panel is electrically connected with the motor assembly and is provided with an overload resistor; the automatic disengaging device is electrically connected with the control board, is arranged on the outer side of the second end of the output shaft and is used for limiting the output shaft assembly; the lithium battery pack provides power for the control panel, the motor assembly and the automatic disengaging device; when the electric wire is drilled in the working process, the internal transmission mechanism can be automatically cut off, so that the lithium electric tool immediately stops the rotary striking action, and the safety of a user is also protected. The invention can be effectively applied to the impact-rotation type lithium electric tools such as electric drills, impact drills, electric hammers, electric picks and the like.
Description
Technical Field
The invention relates to the technical field of handheld lithium electric tools, in particular to an electric shock protection device of a rotary lithium electric tool.
Background
The lithium electric tool is a drilling tool using electricity as power, is a conventional product in electric tools, and is also an electric tool product with the largest demand. The electric drill is often used for drilling on the wall, and often a lot of electric wires are arranged in the wall body, and the electric wire is drilled easily carelessly, and the electric wire is cut off, can cause the electric leakage even, has the potential safety hazard.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the electric shock protection device of the impulse type lithium electric tool, which can realize the automatic cutting of the internal transmission mechanism when the electric wire is drilled in the working process, so that the lithium electric tool immediately stops the action of the impulse and also protects the safety of a user.
The technical scheme adopted by the invention for solving the technical problems is as follows: an electric shock protection device for a rotary lithium electric tool comprises,
the motor assembly comprises a rotor and bearings fixed at two ends of the rotor, the motor assembly is fixed on the shell through the bearings, and one end of a rotating shaft of the rotor is provided with a transmission gear;
the drill chuck assembly is arranged at the head part of the machine body and is used for fixing different drill bits;
the output shaft assembly comprises an output shaft, an output gear, an output shaft bearing and a spring, wherein the first end of the output shaft is arranged in the drill chuck assembly, the second end of the output shaft is provided with a rotatable ball, and the output shaft assembly can transversely move in the machine body;
the control panel is electrically connected with the motor assembly and is provided with an overload resistor;
the automatic disengaging device is electrically connected with the control board, is arranged on the outer side of the second end of the output shaft and is used for limiting the output shaft assembly;
the lithium battery pack is detachably connected to the end part of the handle of the machine body and provides power for the control panel, the motor assembly and the automatic disengaging device;
in a normal use state, the automatic disengaging device forms a limiting part, a spring on the output shaft assembly drives the output shaft to apply force to a second end, so that the ball of the output shaft is abutted against the automatic disengaging device, and the transmission gear is meshed with the output gear;
in the using process, when the drill bit mistakenly hits an electrified wire, the current sequentially passes through the drill bit, the output shaft assembly, the motor assembly and the overload resistor, when the overload resistor detects the current, the control panel controls the automatic disengaging device to lose the power instantly to remove the transverse limit of the output shaft, at the moment, under the action of the spring, the output shaft assembly instantaneously moves towards the motor assembly, the output gear is disengaged from the transmission gear, the output shaft assembly stops rotating, and the output shaft assembly is disconnected from the motor assembly.
Among the above-mentioned technical scheme, it is preferred, automatic disengaging device is including installing fixed part and rotation on the casing are connected limiting plate on the fixed part, the inside of limiting plate with the region that the fixed part contacted is provided with the iron plate, the terminal surface of fixed part is provided with the electro-magnet, during the on-state, the fixed part firmly adsorbs the up end left side position of limiting plate, during the off-state, the limiting plate no longer receives the fixed of fixed part.
Among the above-mentioned technical scheme, preferred, automatic disengaging device is including installing fixed part on the casing, install the separation circle that a flexible material made on the fixed part, separation circle intussuseption is filled with liquid electrorheological fluids, and during the on-state, electrorheological fluids become solid-state from liquid, the separation circle forms vertical limiting plate, and during the off-state, electrorheological fluids become liquid from solid-state, separation circle no longer to the output shaft provides limiting displacement.
In the above technical solution, preferably, the motor assembly further includes a fan fixed at the first end of the rotor, and a commutator and a washer fixed at the second end of the rotor, the washer is located between the commutator and the bearing, teeth are uniformly formed on an outer ring of the washer, and the fan and the washer rotate along with the rotating shaft and provide a dustproof heat dissipation effect for the rotor.
Among the above-mentioned technical scheme, it is preferred, the output shaft subassembly with be provided with the one deck protective layer between the organism, the protective layer is flexible insulating material, the protective layer can play insulating sound-proof effect.
The invention has the beneficial effects that: when the electric wire is arrived in the during operation drilling, the electric current loops through drill bit, output shaft subassembly, motor element, overload resistance, when overload resistance detected the electric current, control panel control automatic disengaging device loses the electricity in the twinkling of an eye, and it is right to remove the horizontal spacing of output shaft this moment under the effect of spring, output shaft subassembly in the twinkling of an eye to motor element direction displacement, output gear break away from with drive gear's meshing, make output shaft subassembly stall to the disconnection with motor element's contact to this can realize automatic cutout inside drive mechanism, makes the lithium electricity instrument immediately stop the action of strikeing, and also protected user's safety.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is an internal structural diagram of the initial state of the present invention.
Fig. 2 is a schematic view of the internal structure of the automatic release device of the present invention in a power-off state.
Fig. 3 is a schematic view of the electronic rotor structure of the present invention.
In the figure, 1, a motor assembly, 2, a rotor, 3, a bearing, 4, a machine shell, 5, a transmission gear, 6, a drill chuck assembly, 7, an output shaft assembly, 71, an output shaft, 72, an output gear, 73, an output shaft bearing, 74, a spring, 8, a control plate, 9, an overload resistor, 10, an automatic disengaging device, 11, a lithium battery pack, 12, a fan, 13, a commutator and 15, a gasket are arranged.
Detailed Description
Referring to fig. 1-3, there are shown embodiments of the present invention: an electric shock protection device for a rotary lithium electric tool comprises,
the motor comprises a motor component 1, wherein the motor component comprises a rotor 2 and bearings 3 fixed at two ends of the rotor 2, the motor component 1 is fixed on a machine shell 4 through the bearings 3, and a transmission gear 5 is installed at one end of a rotating shaft 16 of the rotor 2; the drill chuck assembly 6 is mounted at the head of the machine body and used for fixing different drill bits; an output shaft assembly 7, wherein the output shaft assembly 7 comprises an output shaft 71, an output gear 72, an output shaft bearing 73 and a spring 74, a first end of the output shaft 71 is placed in the drill chuck assembly 6, a second end of the output shaft 71 is provided with a rotatable ball 76, and the output shaft assembly 7 can move transversely in the machine body; the control board 8 is electrically connected with the motor assembly 1, and the control board 8 is provided with an overload resistor 9; the automatic disengaging device 10 is electrically connected with the control board 8, is installed outside the second end of the output shaft 71, and is used for limiting the output shaft assembly 7, and the automatic disengaging device 10 has two forms, which are described in the following; the lithium battery pack 11 is detachably connected to the end part of a handle of the machine body and provides power for the control panel 8, the motor assembly 1 and the automatic disengaging device 10;
in a normal use state, the automatic release device 10 forms a limit part, the spring 74 on the output shaft assembly 7 drives the output shaft 71 to apply force to the second end, the ball 76 of the output shaft 71 abuts against the automatic release device 10, and the transmission gear 5 is meshed with the output gear 72;
in the using process, when the drill bit mistakenly hits an electrified wire, the current sequentially passes through the drill bit, the output shaft assembly 7, the motor assembly 1 and the overload resistor 9, when the overload resistor 9 detects the current, the control board 8 controls the automatic disengaging device 10 to lose power instantly to remove the transverse limit of the output shaft 71, at the moment, under the action of the spring 74, the output shaft assembly 7 instantaneously moves towards the motor assembly 1, the output gear 72 is disengaged from the transmission gear 5, the output shaft assembly 7 stops rotating, and the contact with the motor assembly 1 is cut off.
As a first embodiment of the automatic disengaging means: automatic disengaging device 10 is including installing fixed part and rotation on casing 4 are connected limiting plate on the fixed part, the inside of limiting plate with the region that the fixed part contacted is provided with the iron plate, the terminal surface of fixed part is provided with the electro-magnet, and during the on-state, the fixed part firmly adsorbs the up end left side position of limiting plate, during the off-state, the limiting plate no longer receives the fixed of fixed part.
As a second embodiment of the automatic disengaging device: it is including installing fixed part on the casing, install the separation circle that a flexible material made on the fixed part, separation circle intussuseption is filled with liquid electrorheological fluids, and during the on-state, electrorheological fluids become solid-state from liquid, the separation circle forms vertical limiting plate, and during the off-state, electrorheological fluids become liquid from solid-state, the separation circle is no longer right the output shaft provides limiting displacement.
Further, the motor assembly 1 further includes a fan 12 fixed at the first end of the rotor, and a commutator 13 and a gasket 15 fixed at the second end of the rotor, the gasket 15 is located between the commutator 13 and the bearing 3, teeth are uniformly formed on an outer ring of the gasket 15, and the fan 12 and the gasket 15 rotate along with the rotating shaft 16 and provide a dustproof heat dissipation effect for the rotor 2.
Further, output shaft subassembly and 7 be provided with the one deck protective layer between the organism, the protective layer is flexible insulating material, the protective layer can play insulating sound-proof effect.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and simple modifications, equivalent changes and modifications may be made without departing from the technical scope of the present invention.
Claims (5)
1. Electric shock protection device of impulse type lithium electric tool, its characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the motor assembly comprises a rotor and bearings fixed at two ends of the rotor, the motor assembly is fixed on the shell through the bearings, and one end of a rotating shaft of the rotor is provided with a transmission gear;
the drill chuck assembly is arranged at the head part of the machine body and is used for fixing different drill bits;
the output shaft assembly comprises an output shaft, an output gear, an output shaft bearing and a spring, wherein the first end of the output shaft is arranged in the drill chuck assembly, the second end of the output shaft is provided with a rotatable ball, and the output shaft assembly can transversely move in the machine body;
the control panel is electrically connected with the motor assembly and is provided with an overload resistor;
the automatic disengaging device is electrically connected with the control board, is arranged on the outer side of the second end of the output shaft and is used for limiting the output shaft assembly;
the lithium battery pack is detachably connected to the end part of the handle of the machine body and provides power for the control panel, the motor assembly and the automatic disengaging device;
in a normal use state, the automatic disengaging device forms a limiting part, a spring on the output shaft assembly drives the output shaft to apply force to a second end, so that the ball of the output shaft is abutted against the automatic disengaging device, and the transmission gear is meshed with the output gear;
in the using process, when the drill bit mistakenly hits an electrified wire, the current sequentially passes through the drill bit, the output shaft assembly, the motor assembly and the overload resistor, when the overload resistor detects the current, the control panel controls the automatic disengaging device to lose the power instantly to remove the transverse limit of the output shaft, at the moment, under the action of the spring, the output shaft assembly instantaneously moves towards the motor assembly, the output gear is disengaged from the transmission gear, the output shaft assembly stops rotating, and the output shaft assembly is disconnected from the motor assembly.
2. The electric shock protection device for a lithium impact tool according to claim 1, wherein: the automatic disengaging device comprises a fixing portion and a limiting plate, wherein the fixing portion and the limiting plate are rotatably connected to the fixing portion, an iron block is arranged in an area where the fixing portion contacts, an electromagnet is arranged on the end face of the fixing portion, the fixing portion firmly adsorbs the left side portion of the upper end face of the limiting plate when the limiting plate is in a power-on state, and the limiting plate is not fixed to the fixing portion when the limiting plate is in a power-off state.
3. The electric shock protection device for a lithium impact tool according to claim 1, wherein: automatic disengaging device is including installing fixed part on the casing, install the separation circle that a flexible material made on the fixed part, separation circle intussuseption is filled with liquid electrorheological fluids, and during the on-state, electrorheological fluids become solid-state from liquid, the separation circle forms vertical limiting plate, and during the off-state, electrorheological fluids become liquid from solid-state, the separation circle no longer right the output shaft provides limiting displacement.
4. The electric shock protection device for a lithium impact tool according to claim 1, wherein: the motor assembly further comprises a fan fixed at the first end of the rotor, and a commutator and a gasket fixed at the second end of the rotor, wherein the gasket is located between the commutator and the bearing, teeth are uniformly formed on the outer ring of the gasket, and the fan and the gasket rotate along with the rotating shaft and provide a dustproof heat dissipation effect for the rotor.
5. The electric shock protection device for a lithium impact tool according to claim 1, wherein: the output shaft assembly with be provided with the one deck protective layer between the organism, the protective layer is flexible insulating material, the protective layer can play insulating syllable-dividing effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010571832.4A CN111702723B (en) | 2020-06-22 | 2020-06-22 | Electric shock protection device of impulse-type lithium electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010571832.4A CN111702723B (en) | 2020-06-22 | 2020-06-22 | Electric shock protection device of impulse-type lithium electric tool |
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| Publication Number | Publication Date |
|---|---|
| CN111702723A CN111702723A (en) | 2020-09-25 |
| CN111702723B true CN111702723B (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010571832.4A Active CN111702723B (en) | 2020-06-22 | 2020-06-22 | Electric shock protection device of impulse-type lithium electric tool |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004249431A (en) * | 2003-02-21 | 2004-09-09 | Hitachi Koki Co Ltd | Power tool |
| CN103906600A (en) * | 2011-11-04 | 2014-07-02 | 阿特拉斯·科普柯工业技术公司 | Power tool and method of operating an automated drilling operation |
| CN108478194A (en) * | 2018-05-08 | 2018-09-04 | 慈溪市隆诚贸易有限公司 | A kind of noninvasive and minimally invasive checkout and diagnosis device |
| CN110364888A (en) * | 2019-08-08 | 2019-10-22 | 胡伟 | Socket and plug-assembly with electroshock-proof function |
| CN209637659U (en) * | 2019-02-21 | 2019-11-15 | 王甄毅 | Electric line steps on bar ladder |
-
2020
- 2020-06-22 CN CN202010571832.4A patent/CN111702723B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004249431A (en) * | 2003-02-21 | 2004-09-09 | Hitachi Koki Co Ltd | Power tool |
| CN103906600A (en) * | 2011-11-04 | 2014-07-02 | 阿特拉斯·科普柯工业技术公司 | Power tool and method of operating an automated drilling operation |
| CN108478194A (en) * | 2018-05-08 | 2018-09-04 | 慈溪市隆诚贸易有限公司 | A kind of noninvasive and minimally invasive checkout and diagnosis device |
| CN209637659U (en) * | 2019-02-21 | 2019-11-15 | 王甄毅 | Electric line steps on bar ladder |
| CN110364888A (en) * | 2019-08-08 | 2019-10-22 | 胡伟 | Socket and plug-assembly with electroshock-proof function |
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| Publication number | Publication date |
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| CN111702723A (en) | 2020-09-25 |
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Denomination of invention: Electric shock protection device for rotary lithium battery tools Effective date of registration: 20230718 Granted publication date: 20220325 Pledgee: Yongkang Branch of China Construction Bank Co.,Ltd. Pledgor: ZHEJIANG MINLI POWER TOOLS CO.,LTD. Registration number: Y2023980048803 |