CN205140793U - Brushless electric tool switch structure - Google Patents
Brushless electric tool switch structure Download PDFInfo
- Publication number
- CN205140793U CN205140793U CN201520914216.9U CN201520914216U CN205140793U CN 205140793 U CN205140793 U CN 205140793U CN 201520914216 U CN201520914216 U CN 201520914216U CN 205140793 U CN205140793 U CN 205140793U
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- break
- make
- copper foil
- push rod
- variable resistance
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Abstract
The utility model relates to a technical field especially relates to a brushless electric tool switch structure, the utility model discloses a brushless electric tool switch structure reduce cost improves production efficiency, and the bad problem of solving switch disconnection under the vibration is and improve the inaccurate problem in switch break -make position, including casing, trigger and push rod, the inside of casing is provided with the working chamber to be provided with thrust spring in the working chamber, varistor slips piece and electron plate, include still that the break -make slips the piece, still be provided with break -make copper foil track on the electron plate to be provided with the break -make output line on break -make copper foil track, the one end that the piece is slipped to the break -make is fixed with the push rod, and the other end that the piece is slipped to the break -make is located break -make copper foil track, and break -make copper foil track is connected with the break -make output line is electric, when the push rod moved to the left side, the break -make was slipped piece and break -make output line electricity and is connected, and when moved the push rod dextrad, the piece is slipped to the break -make and the break -make output line breaks off.
Description
Technical field
The utility model relates to technical field, particularly relates to a kind of brushless electric tool construction of switch.
Background technology
As everyone knows, existing brushless electric tool switch has break-make, variable resistance and electronic commutation function, the realization of its function is as follows respectively: break-make supply mode is by the operation of people to the actuator of switch, drive the contact between moving contact and fixed contact and separate, thus realizing the logical and disconnected of high-current circuit; Variable resistance supply mode is by the operation of people to the actuator of switch, drives sliding sheet to slide on the carbon film track of electron plate, thus realizes the change of resistance value, thus the different rotating speeds of implementation tool; Electronic commutation is by people's stirring reversing bar, and commutation slide plate is connected different circuit on electron plate and provided unlike signal, from the rotating of face implementation tool; The development trend of present brushless control switch is electronization, namely the switch of increasing super-high-current is with electronics switch part (such as controllable silicon, thyristor etc.) break-make replace the break-make of mechanical contact system, the break-make of certain electronic component also needs to provide a make-and-break signal to realize.
As shown in Figures 1 to 4, existing brushless electric tool construction of switch comprises housing 1, trigger 2 and push rod 3, the inside of housing is provided with working chamber, and in working chamber, be provided with bracket 4, connect bridge 5, moving contact 6, fixed contact 7, spring, variable resistance slips sheet 8, electron plate 9 and fixed end 10, one end of push rod is passed housing and is touched with the bridge joint that connects in housing, the other end of push rod is positioned at hull outside and fixes with trigger, one end and the working chamber inwall of spring are fixed, the other end of spring contacts with push rod, bracket is arranged on working chamber inwall, and shell fragment is fixed with on bracket, the output of shell fragment with connect bridge joint and touch, moving contact is arranged on and connects on bridge, fixed contact is arranged on working chamber inwall by fixed end, and fixed contact is positioned at the below of moving contact, electron plate is provided with variable resistance carbon film track 11, and variable resistance output line is provided with on variable resistance carbon film track, variable resistance slips one end of sheet and push rod is fixed, and the other end that variable resistance slips sheet is positioned on variable resistance carbon film track, and variable resistance carbon film track is electrically connected with variable resistance output line, the operation principle of this kind of electric tool switch device is: staff or miscellaneous equipment promote trigger left, trigger can drive push rod to left movement, so push rod be applied to connect bridge right-hand member make it clockwise around bracket fulcrum rotate disconnect power will disappear, connect bridge will rotate around bracket fulcrum counterclockwise under the pressure effect of shell fragment, thus fixed contact is contacted, achieve the connection of fixed end and bracket, otherwise, if staff or miscellaneous equipment unclamp to the right and make the power acted on trigger disappear in an on state, push rod moves right under the effect of thrust spring, the right side promoting to connect bridge makes it turn clockwise around bracket fulcrum, because shell fragment is applied to the revolving force connecing bridge to the pressure connecing bridge by push rod much smaller than thrust spring, turn clockwise so connect bridge moving contact and fixed contact are left, achieve the disconnection between fixed end and bracket, and bracket and fixed end will directly is connected with the control board of instrument by electric wire, or be connected with control board by electric wire again by spring or direct to connect with electron plate, thus the through and off on signal are provided, staff or miscellaneous equipment promote trigger left, and trigger can drive the variable resistance on push rod to slip sheet, along the carbon film slide rail of electron plate to left movement, thus realize the change of variable resistance output resistance.Variable resistance output to be connected with instrument control board by electric wire by circuit on electron plate again and to link up;
The shortcoming of the supply mode of available circuit break-make has:
1, for signaling switch, electric current is usually at below 1A, and realizing this function material used by above-mentioned make break contact system too wastes;
2, part used makes assembly process many more, and production efficiency is low;
3, in the application of some instrument, have problem, such as will produce contact and disconnect bad and affect tool performance in the spanner that vibration is large; This disconnection simultaneously can shorten the life-span of electronic switch part;
4, because parts are too many, the existence of the cumulative limit between each parts, when making switch on and off, journey error scope is large.
Utility model content
For solving the problems of the technologies described above, the utility model provides one to reduce costs, and enhances productivity, and solves the bad problem that disconnects under vibration of switch and improves the brushless electric tool construction of switch of the inaccurate problem in switch on and off position.
Brushless electric tool construction of switch of the present utility model, comprise housing, trigger and push rod, the inside of housing is provided with working chamber, and thrust spring is provided with in working chamber, variable resistance slips sheet and electron plate, one end of push rod is passed housing and stretches in working chamber, the other end of push rod is positioned at hull outside and fixes with trigger, one end and the working chamber inwall of thrust spring are fixed, the other end of thrust spring contacts with push rod, electron plate is provided with variable resistance carbon film track, and variable resistance output line is provided with on variable resistance carbon film track, variable resistance slips one end of sheet and push rod is fixed, the other end that variable resistance slips sheet is positioned on variable resistance carbon film track, and variable resistance carbon film track is electrically connected with variable resistance output, also comprise break-make and slip sheet, described electron plate is also provided with break-make Copper Foil track, and break-make output line is provided with on break-make Copper Foil track, break-make slips one end of sheet and push rod is fixed, the other end that break-make slips sheet is positioned on break-make Copper Foil track, and break-make Copper Foil track is electrically connected with break-make output line, when push rod moves to the left, described break-make is slipped sheet and is electrically connected with break-make output line, and when push rod moves to the right, described break-make slips sheet and break-make output line disconnects.
Brushless electric tool construction of switch of the present utility model, described break-make Copper Foil track comprises the public Copper Foil of break-make, break-make connects Copper Foil and break-make neutral Copper Foil, and break-make output line is connected Copper Foil with the public Copper Foil of break-make and break-make and is electrically connected, when push rod moves to the left, described break-make is slipped sheet and is connected Copper Foil with the public Copper Foil of break-make and break-make and be electrically connected, when push rod moves to the right, described break-make is slipped sheet and is electrically connected with the public Copper Foil of break-make and break-make neutral Copper Foil.
Brushless electric tool construction of switch of the present utility model, described housing comprises drain pan and upper cover, and the top of described drain pan is provided with low groove, and the bottom of described upper cover is provided with upper groove, described upper cover is arranged on the top of drain pan, the working chamber described in being formed and described upper groove communicates with low groove.
Compared with prior art the beneficial effects of the utility model are: by above-mentioned setting, can reach and reduce costs, enhance productivity, and solve the bad problem that disconnects under vibration of switch and improve the effect of the inaccurate problem in switch on and off position.
Accompanying drawing explanation
Fig. 1 is the cutaway view of prior art;
Fig. 2 is that in prior art, variable resistance slips the structural representation that sheet is connected with variable resistance carbon film track;
Fig. 3 is that in prior art, variable resistance slips the structural representation that sheet is connected with push rod;
Fig. 4 is the structural representation of prior art;
Fig. 5 is cutaway view of the present utility model;
Fig. 6 is that in the utility model, variable resistance slips that sheet is connected with variable resistance carbon film track, break-make slips the structural representation that sheet is connected with break-make Copper Foil track;
Fig. 7 is that in the utility model, variable resistance slips sheet, break-make slips the structural representation that sheet is connected with push rod;
Fig. 8 is cutaway view of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples for illustration of the utility model, but are not used for limiting scope of the present utility model.
As shown in Fig. 5 to Fig. 8, brushless electric tool construction of switch of the present utility model, comprise housing, trigger 21 and push rod 22, the inside of housing is provided with working chamber, and in working chamber, be provided with thrust spring 23, variable resistance slips sheet 24 and electron plate 25, one end of push rod is passed housing and stretches in working chamber, the other end of push rod is positioned at hull outside and fixes with trigger, one end and the working chamber inwall of thrust spring are fixed, the other end of thrust spring contacts with push rod, electron plate is provided with variable resistance carbon film track 26, and variable resistance output line is provided with on variable resistance carbon film track, variable resistance slips one end of sheet and push rod is fixed, the other end that variable resistance slips sheet is positioned on variable resistance carbon film track, and variable resistance carbon film track is electrically connected with variable resistance output, also comprise break-make and slip sheet 27, electron plate is also provided with break-make Copper Foil track 28, and break-make output line is provided with on break-make Copper Foil track, break-make slips one end of sheet and push rod is fixed, the other end that break-make slips sheet is positioned on break-make Copper Foil track, and break-make Copper Foil track is electrically connected with break-make output line, when push rod moves to the left, break-make is slipped sheet and is electrically connected with break-make output line, and when push rod moves to the right, break-make slips sheet and break-make output line disconnects, by above-mentioned setting, can reach and reduce costs, enhance productivity, solve the bad problem that disconnects under vibration of switch and improve the effect of the inaccurate problem in switch on and off position.
Brushless electric tool construction of switch of the present utility model, break-make Copper Foil track comprises the public Copper Foil 29 of break-make, break-make connects Copper Foil 30 and break-make neutral Copper Foil 31, and break-make output line is connected Copper Foil with the public Copper Foil of break-make and break-make and is electrically connected, when push rod moves to the left, break-make is slipped sheet and is connected Copper Foil with the public Copper Foil of break-make and break-make and be electrically connected, when push rod moves to the right, break-make is slipped sheet and is electrically connected with the public Copper Foil of break-make and break-make neutral Copper Foil.
Brushless electric tool construction of switch of the present utility model, housing comprises drain pan 32 and upper cover 33, and the top of drain pan is provided with low groove, and the bottom of upper cover is provided with upper groove, and upper cover is arranged on the top of drain pan, the working chamber formed and upper groove communicates with low groove.
Brushless electric tool construction of switch of the present utility model is realized in the correlated parts of existing variable resistance structure by switch on and off function i ntegration, thus instead of original dependence move fixed contact disconnect and the structure contacted.Specifically on original electron plate, increase break-make Copper Foil track, original push rod increases a break-make and slips sheet, by the operation of human body to trigger, drive the sliding sheet on push rod to slide on Copper Foil, thus realize break-make; It is constant that variable resistance function maintains original implementation; Its principle works as switch in its natural state, and as above shown in Fig. 5 left side, break-make is slipped sheet and only contacted " neutral gear Copper Foil " and " public Copper Foil ", and break-make exports and disconnects.The effect of this " neutral gear Copper Foil " ensures to slip sheet at connection front and back Copper Foil height unanimously, and the wearing and tearing and the elimination contact that reduce part are beated; When staff or miscellaneous equipment promote trigger left, trigger can drive push rod to left movement, and the break-make be assemblied on push rod is slipped sector-meeting and slided along the break-make copper track of electron plate, when sliding sheet contact " connection Copper Foil " and " public Copper Foil ", as above, shown on the right of Fig. 5, break-make exports to be connected.Break-make output is linked up through the control board of electric wire and instrument by the circuit of electron plate again, thus connects electronic switch part; Otherwise, if staff or miscellaneous equipment unclamp to the right and make the power acted on trigger disappear in an on state, push rod moves right under the effect of thrust spring, be assemblied in the sliding sheet on push rod to slide to the right along the break-make copper foil of electron plate, when sliding sheet disconnects with " connection Copper Foil " and only contacts with " neutral gear Copper Foil ", off-state got back to again by switch; New construction eliminates fixed end, moved end and line ball lid, but direct the closely cooperating of dependence drain pan and upper cover, enhance dust reduction capability; This new construction decreases the parts (comprise moving contact/fixed contact/fixed end/connect bridge/bracket/shell fragment) of many costlinesses, makes purchase cost reduce nearly about 50%; Eliminate the assembling of many parts and processing (as the welding of wire rod and terminal, the riveted etc. of contact and terminal), new construction is assembled very easily simple, through actual production statistics, efficiency improves about 40%; Slide vane structure now used is because the quality of part is little, and inertia is little.This structure uses the disconnection that also can not cause sliding sheet and electron plate Copper Foil in the strong instrument of vibration, improves mechanical contact and causes the exception of instrument and the damage phenomenon to electronic switch part because of the large vibration tripping of quality; The cumulative limit that the assembling avoiding too many part brings, makes switch on and off position stroke tolerance better control; New construction can reach more than IP60 grade through the dust-proof effect of test new construction.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection range of the present utility model.
Claims (3)
1. a brushless electric tool construction of switch, comprise housing, trigger and push rod, the inside of housing is provided with working chamber, and thrust spring is provided with in working chamber, variable resistance slips sheet and electron plate, one end of push rod is passed housing and stretches in working chamber, the other end of push rod is positioned at hull outside and fixes with trigger, one end and the working chamber inwall of thrust spring are fixed, the other end of thrust spring contacts with push rod, electron plate is provided with variable resistance carbon film track, and variable resistance output line is provided with on variable resistance carbon film track, variable resistance slips one end of sheet and push rod is fixed, the other end that variable resistance slips sheet is positioned on variable resistance carbon film track, and variable resistance carbon film track is electrically connected with variable resistance output, it is characterized in that, also comprise break-make and slip sheet, described electron plate is also provided with break-make Copper Foil track, and break-make output line is provided with on break-make Copper Foil track, break-make slips one end of sheet and push rod is fixed, the other end that break-make slips sheet is positioned on break-make Copper Foil track, and break-make Copper Foil track is electrically connected with break-make output line, when push rod moves to the left, described break-make is slipped sheet and is electrically connected with break-make output line, and when push rod moves to the right, described break-make slips sheet and break-make output line disconnects.
2. brushless electric tool construction of switch as claimed in claim 1, it is characterized in that, described break-make Copper Foil track comprises the public Copper Foil of break-make, break-make connects Copper Foil and break-make neutral Copper Foil, and break-make output line is connected Copper Foil with the public Copper Foil of break-make and break-make and is electrically connected, when push rod moves to the left, described break-make is slipped sheet and is connected Copper Foil with the public Copper Foil of break-make and break-make and be electrically connected, and when push rod moves to the right, described break-make is slipped sheet and is electrically connected with the public Copper Foil of break-make and break-make neutral Copper Foil.
3. brushless electric tool construction of switch as claimed in claim 2, it is characterized in that, described housing comprises drain pan and upper cover, the top of described drain pan is provided with low groove, the bottom of described upper cover is provided with upper groove, described upper cover is arranged on the top of drain pan, the working chamber described in being formed and described upper groove communicates with low groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520914216.9U CN205140793U (en) | 2015-11-16 | 2015-11-16 | Brushless electric tool switch structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520914216.9U CN205140793U (en) | 2015-11-16 | 2015-11-16 | Brushless electric tool switch structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205140793U true CN205140793U (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520914216.9U Active CN205140793U (en) | 2015-11-16 | 2015-11-16 | Brushless electric tool switch structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN205140793U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591261A (en) * | 2017-09-29 | 2018-01-16 | 苏州华之杰电讯股份有限公司 | A kind of brushless direct-current pure signal switch |
| CN107863256A (en) * | 2016-09-21 | 2018-03-30 | 德昌电机(深圳)有限公司 | Electronic switch |
| CN110473731A (en) * | 2019-08-28 | 2019-11-19 | 科都电气有限公司 | A kind of direct current speed adjustment switch |
-
2015
- 2015-11-16 CN CN201520914216.9U patent/CN205140793U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863256A (en) * | 2016-09-21 | 2018-03-30 | 德昌电机(深圳)有限公司 | Electronic switch |
| CN107591261A (en) * | 2017-09-29 | 2018-01-16 | 苏州华之杰电讯股份有限公司 | A kind of brushless direct-current pure signal switch |
| CN107591261B (en) * | 2017-09-29 | 2021-01-26 | 苏州华之杰电讯股份有限公司 | Brushless direct current pure signal switch |
| CN110473731A (en) * | 2019-08-28 | 2019-11-19 | 科都电气有限公司 | A kind of direct current speed adjustment switch |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |