CN202114590U - Electric angle grinder with overload protection - Google Patents
Electric angle grinder with overload protection Download PDFInfo
- Publication number
- CN202114590U CN202114590U CN2010206978585U CN201020697858U CN202114590U CN 202114590 U CN202114590 U CN 202114590U CN 2010206978585 U CN2010206978585 U CN 2010206978585U CN 201020697858 U CN201020697858 U CN 201020697858U CN 202114590 U CN202114590 U CN 202114590U
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- switch
- protective device
- overload protective
- resets
- push button
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Abstract
The utility model provides an electric angle grinder with an overload protection, which has simple structure and low cost, and is safer. A main switch for controlling the on/off of a motor and a normally closed manual reset overload protector, which is in series connected with a circuit of the main switch, are arranged in a machine housing of the electric angle grinder; a switch push button is arranged outside the machine housing, and the switch push button is operated to drive a switch tension rod connected with the switch push button to operate a button of the main switch, so that the operation and the stop of the electric angle grinder are controlled. In the on and off switching processes of the switch push button, the resetting and triggering is carried out to the overload protector by the switch tension rod.
Description
Technical field
The utility model relates to a kind of electronic angle grinding machine, relates in particular to the electronic angle of a kind of small-power grinding machine.
Background technology
Electronic angle grinding machine (the electronic angle of small-power grinding machine) has functions such as polishing and cutting, is very a kind of widely electric tool of a kind of application.Electronic angle grinding machine have one motor is housed engine housing; A transmission device termination that has the driving main shaft of stretching out is set on a housing end face of this engine housing regularly; In this engine housing, be provided with the main switch of a control motor on/off, outside engine housing, also be provided with a switch push button, the console switch push button can make its position change; The switch lever that drive is attached thereto also correspondingly occurrence positions move; The button that switch lever also drives main switch moves, and makes being switched on or switched off of main switch, the operation of controlling electronic angle grinding machine with stop.Cutting metal and stone material need consume bigger energy; The operator is in the process of using the electronic angle of small-power grinding machine to cut; The motor of angle grinding machine is easier to overload operation; And general angle grinding machine is not provided with overload protective device usually, and overload can produce adverse consequences such as motor damage, angle grinding machine inefficacy for a long time.
In order to improve the deficiency of the electronic angle of said structure grinding machine, in the grinding machine of electronic angle, increase overload protective device, can effectively protect the motor of electronic angle grinding machine, but also can produce some new potential safety hazards after increasing overload protective device.In the grinding machine of electronic angle, increase automatically reset overload protective device; Electronic angle grinding machine in the work can break off because of overload make the contact of automatically reset overload protective device, and the angle grinding machine shuts down, if the operator forgets the switch push button of control main switch reset (promptly being locked in "open" state to switch push button); Main switch still is in on-state; Overload protective device can automatically reset after cooling after a while, and the closing of contact is connected the angle grinding machine is started suddenly; Produce potential safety hazard, this does not meet the GB that angle grinding machine switch can not accidental activation yet; On the grinding machine of electronic angle, increase the overload protective device of hand-reset,, expose the reset button of overload protective device being arranged on outside the engine housing usually for the ease of reset operation; Electronic angle grinding machine in the work breaks off because of overload makes the contact of overload protective device, and the angle grinding machine can shut down, and resets the switch push button of control main switch if the operator forgets; Main switch still is in on-state; The cooling after a while of overload protective device warp resets with regard to enable manual, touches the reset button of overload protective device when operator's accident; The contact of overload protective device closed connection that will reset; And the angle grinding machine is started suddenly, will produce potential safety hazard, the GB that this switch that does not also meet the angle grinding machine can not accidental activation.Here said overload protective device is often referred to by bimetal leaf or the responsive utensil of PTC equitemperature and constitutes mechanical overcurrent protector, can certainly be the overcurrent protector of electronic type.The function of the overcurrent protector of electronic type is stronger, can satisfy the requirement of angle grinding machine, but because product cost is higher, is unfavorable for the extensive use of product.
Summary of the invention
The purpose of the utility model is: provide a kind of simple in structure, cheaply, and the electronic angle grinding machine of safer band overload protection.
The utility model is realized through following technical scheme:
A kind of electronic angle grinding machine with overload protection; Have an engine housing that motor is housed, a transmission device termination that has the driving main shaft of stretching out is set on a housing end face of this engine housing regularly, the normally closed hand-reset overload protective device that main switch and who in this engine housing, is provided with a control motor on/off and the circuit of main switch are in series; Outside engine housing, also be provided with a switch push button; The console switch push button can make its position change, drive the switch lever be attached thereto also correspondingly occurrence positions move, the button that switch lever drives main switch moves; Make being switched on or switched off of main switch; The operation of controlling electronic angle grinding machine with stop, the resetting of overload protective device is in the process that the switch push button occurrence positions moves, to carry out, triggers through switch lever; And switch push button does not carry out reset trigger to overload protective device when being in " opening " and " pass " state.The electronic angle grinding machine of design can unexpectedly not start like this, and the reset button of overload protective device can not be in reset mode for a long time yet.
The advantage of the utility model is: through in the grinding machine of electronic angle, setting up the normally closed hand-reset overload protective device that a circuit with main switch is in series; Just can low cost, the long-life, protect the normal operation of motor efficiently, and the setting of hand-reset overload protective device can not influence the handling safety of electronic angle grinding machine.
The electronic angle grinding machine of this band overload protection can come through the measure of describing in the following technical scheme further to improve and be perfect.
Switch lever is provided with and triggers the convexity that resets that overload protective device resets; Be that the protruding rise that reset button is produced that resets when utilizing the switch lever occurrence positions to move resets; The protruding contact-making surface with the overload protective device reset button that resets is arranged to inclined-plane or cambered surface; Perpendicular basically setting of direction that overload protective device moves by its reset direction and switch lever position, i.e. direction radially being provided with that reset of overload protective device along motor.As long as set up the convexity that resets in switch lever, reset with regard to the convexity that resets of switch lever capable of using, need not to increase other part and just can realize overload protective device is resetted, simple in structure, cost province.
Connect one on the switch lever and trigger the fork that resets that overload protective device resets.Switch lever is to realize through the fork that resets that connects on the switch lever to resetting of overload protective device; Be indirect; The setting of corresponding overload protective device is also more convenient therewith, and is less to the constraint of its direction and return stroke, can utilize the no-load voltage ratio of the fork that resets and shape to adjust.
Main switch can be normal open switch or normally closed switch.Main switch and switch lever can be provided with like this: main switch is a normal open switch, when switch push button is in "off" state, is arranged to not press the button of main switch to switch lever, and the contact of main switch just is in off-state; When switch push button is in "open" state, be arranged to pressing the button of main switch to switch lever, the contact of main switch just is in the state of closing.Main switch is a normally closed switch, when switch push button is in "off" state, is arranged to pressing the button of main switch to switch lever, and the contact of main switch just is in off-state; When switch push button is in "open" state, be arranged to not press the button of main switch to switch lever, the contact of main switch just is in the state of closing.
Description of drawings
Fig. 1 is the partial sectional view of electronic angle grinding machine of the band overload protection of the utility model.Switch push button among the figure is in "off" state, and the main switch among the figure is a normal open switch, and the protruding contact-making surface with the overload protective device reset button that resets on the switch lever is arranged to the inclined-plane.
Fig. 2 is the partial schematic diagram that electronic angle grinding machine shown in Figure 1 amplifies.
Fig. 3 is the partial schematic diagram of the another one embodiment of the utility model.Switch push button among the figure is in "off" state, and the main switch among the figure is a normal open switch, connects one on the switch lever and triggers the fork that resets that overload protective device resets.
The specific embodiment
As shown in Figure 1: the electronic angle grinding machine (10) of band overload protection; Has an engine housing (11) that motor is housed; On a housing end face of this engine housing (11), be provided with a transmission device termination (12) that has the driving main shaft (13) of stretching out regularly; The normally closed hand-reset overload protective device (50) that main switch (40) and who in this engine housing (11), is provided with a control motor on/off and the circuit of main switch (40) are in series; Outside engine housing (11), also be provided with a switch push button (20); Console switch push button (20) can make its position be moved, and also correspondingly occurrence positions moves to drive the switch lever (30) that is attached thereto, and the button (45) that switch lever (30) drives main switch (40) moves; Make being switched on or switched off of main switch (40); The operation of controlling electronic angle grinding machine (10) with stop, the homing action of overload protective device (50) is in the process that switch push button (20) occurrence positions moves, to realize, is to realize through the triggering of switch lever (30) to the reset button (55) of overload protective device (50); When switch push button (20) was in " opening " and " pass " state, switch lever (30) was not to carrying out reset trigger with the reset button (55) of overload protective device (50).
When electronic angle grinding machine did not start, switch push button and switch lever were in "off" state exactly; After electronic angle grinding machine starts; Switch push button and switch lever are in "open" state exactly; This in stable condition state of " opening " that electronic angle grinding machine is in for a long time and " pass "; Therefore switch push button is when " opening " and " pass " state, and switch lever can not be to carrying out reset trigger with the reset button of overload protective device, otherwise can cause overload protective device to come into force because of reset trigger for a long time.And the time that switch " opening " " pass " is extremely short; Reset button to overload protective device in the process of switching triggers; Being to trigger through the reset button of switch lever to overload protective device in the process that moves of switch push button occurrence positions, is comparatively rational.
Among Fig. 2, the convexity that resets on the switch lever when being " pass ", " in the handoff procedure " and " opening " three states respectively of (35), (35 ') and (35 "), the reset button when (55) and (55 ') are non-reset mode and reset mode respectively on the overload protective device.Switch lever (30) is provided with the convexity that resets that triggers overload protective device (50) and reset (35,35 ' and 35 "); the convexity that resets is can the rise B1 that reset button produces to be resetted when utilizing switch lever to be subjected to displacement A; the contact-making surface of protruding and overload protective device (50) reset button of resetting (55 and 55 ") is arranged to inclined-plane or cambered surface; Perpendicular basically setting of direction that overload protective device moves by its reset direction and switch lever position, i.e. roughly radially being provided with of direction that reset of overload protective device along motor.
Among Fig. 3; (36), the bearing pin that is connected with the fork that resets of (36 ') and (36 ") switch lever when being " pass ", three states of " in the handoff procedure " and " opening " respectively, (60), (60 ') and (the 60 ") fork that resets when being " pass ", " in the handoff procedure " and " opening " three states respectively.(55) and (55 ') reset button on the overload protective device when being non-reset mode and reset mode respectively.The fork that resets that the last connection triggering overload protective device of switch lever (30) (50) resets (60,60 ' and 60 ").The bearing pin (36,36 ' and 36 ") that connects the fork that resets on the switch lever is subjected to displacement A, and the fork that resets (60,60 ' and 60 ") rotate to an angle around fixed axis (18), the fork that resets is to the reset button on the overload protective device (55 and 55 ') generation rise B2.Switch lever is to realize through the fork that resets that connects on the switch lever to the resetting of overload protective device, is indirect.Can find with Fig. 3 through comparison diagram 2; Switch lever displacement A equates; Can be much bigger but produce rise B2 among Fig. 3 than producing rise B1 among Fig. 2; Can certainly be designed to smallerly, rise B2 can be identical with switch lever position moving direction, i.e. direction axially being provided with along motor that reset of overload protective device; The direction that resets of overload protective device also can be arranged to vertical with the position moving direction; Be reseting movement direction radially being provided with of overload protective device along motor; As long as the fork shape makes strip into resetting; Therefore the setting of overload protective device is also more convenient, and is less to the constraint of its reset direction and return stroke, can utilize the no-load voltage ratio of the fork that resets and shape to adjust.
Among Fig. 2, main switch is a normal open switch, and when switch push button was in "off" state, switch lever was not pressed the button of main switch, and the contact of main switch just is in off-state; When switch push button was in "open" state, switch lever was being pressed the button of main switch, and the contact of main switch just is in the state of closing.Among Fig. 3, main switch is a normally closed switch, and when switch push button was in "off" state, switch lever was being pressed the button of main switch, and the contact of main switch just is in off-state; When switch push button was in "open" state, switch lever was not pressed the button of main switch, and the contact of main switch just is in the state of closing.Therefore main switch can be a normal open switch, also can be normally closed switch.
Claims (4)
1. electronic angle grinding machine with overload protection; Has an engine housing that motor is housed; A transmission device termination that has the driving main shaft of stretching out is set on a housing end face of this engine housing regularly; The normally closed hand-reset overload protective device that main switch and who in this engine housing, is provided with a control motor on/off and the circuit of main switch are in series; Outside engine housing, also be provided with a switch push button; Switch push button carries out on/off control and overload protective device is carried out reset trigger main switch through the switch lever in the engine housing that is attached thereto, and it is characterized in that: described switch push button is when " opening " and " pass " state, and switch lever is not carried out reset trigger to overload protective device.
2. electronic angle according to claim 1 grinding machine is characterized in that: described switch lever is provided with and triggers the convexity that resets that overload protective device resets, and the protruding contact-making surface with the overload protective device reset button that resets is inclined-plane or cambered surface.
3. electronic angle according to claim 1 grinding machine is characterized in that: be connected with one on the described switch lever and trigger the fork that resets that overload protective device resets.
4. according to claim 1 or 2 or 3 described hand held electric tools, it is characterized in that: described main switch is normal open switch or normally closed switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206978585U CN202114590U (en) | 2010-12-25 | 2010-12-25 | Electric angle grinder with overload protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206978585U CN202114590U (en) | 2010-12-25 | 2010-12-25 | Electric angle grinder with overload protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202114590U true CN202114590U (en) | 2012-01-18 |
Family
ID=45455688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206978585U Expired - Fee Related CN202114590U (en) | 2010-12-25 | 2010-12-25 | Electric angle grinder with overload protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202114590U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240659A (en) * | 2013-04-12 | 2013-08-14 | 浙江金美电动工具有限公司 | Angle grinder with power-off protection and circuit of angle grinder |
| CN110891700A (en) * | 2017-08-16 | 2020-03-17 | 阿尔弗雷德·卡赫欧洲两合公司 | High pressure cleaning machine |
| WO2021078251A1 (en) * | 2019-10-25 | 2021-04-29 | 南京德朔实业有限公司 | Electric tool |
-
2010
- 2010-12-25 CN CN2010206978585U patent/CN202114590U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240659A (en) * | 2013-04-12 | 2013-08-14 | 浙江金美电动工具有限公司 | Angle grinder with power-off protection and circuit of angle grinder |
| CN103240659B (en) * | 2013-04-12 | 2016-07-06 | 浙江金美电动工具有限公司 | A kind of electric angle grinder with power-off protection and circuit thereof |
| CN110891700A (en) * | 2017-08-16 | 2020-03-17 | 阿尔弗雷德·卡赫欧洲两合公司 | High pressure cleaning machine |
| CN110891700B (en) * | 2017-08-16 | 2022-05-13 | 阿尔弗雷德·卡赫欧洲两合公司 | High pressure cleaning machine |
| WO2021078251A1 (en) * | 2019-10-25 | 2021-04-29 | 南京德朔实业有限公司 | Electric tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20161225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |