CN105269067A - Electric circular saw with movable protection cover - Google Patents
Electric circular saw with movable protection cover Download PDFInfo
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- CN105269067A CN105269067A CN201510454530.8A CN201510454530A CN105269067A CN 105269067 A CN105269067 A CN 105269067A CN 201510454530 A CN201510454530 A CN 201510454530A CN 105269067 A CN105269067 A CN 105269067A
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- hook
- rotating disk
- pin
- circular saw
- stop lever
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Abstract
An electric circular saw with a movable protection cover comprises a shell, a motor, a motor switch, a switch control rod and a floor. The switch control rod is rotatably arranged on the inner wall of the shell through a pin shaft and provided with a switch trigger locking device and a bottom plate capable of rotating around a pivot on the shell. The protection cover and a support are fixed to the bottom plate, and an elastic element is arranged between the bottom plate and the shell. The electric circular saw is characterized in that the electric circular saw further comprises a stop lever, a hook and a hook control device; the stop lever is in linkage with the switch control rod and rotates around the pin shaft, the support is prevented from moving when a motor switch is locked by the switch control rod, and the stop lever rotates and deflects when locking is relieved; the hook is used for hooking or releasing the support and provided with a limiting device used for limiting rotation of the stop lever, and when the support is released, the limiting device abuts against the stop lever and limits rotation of the stop lever; and the hook control device can rotate the hook by a certain angle and lock the hook, and the hook control device can reset under the action of the support after locking.
Description
Technical field
The present invention relates to a kind of electric circular saw, particularly there is the electric circular saw of flexible blade guard.
Background technology
The saw blade of electric circular saw can damage human body under High Rotation Speed, and in order to protect personal safety, tool industry develops the electric circular saw of band flexible blade guard, and this kind of electric circular saw is when nature, and saw blade is hidden in protective cover, from external contact less than saw blade; Time in working order, pressure flexible blade guard, saw blade just can be exposed to outside, ensures safety with extraneous touch opportunity by reducing saw blade; And when opening protective cover and changing saw blade, safety device limiting motor switch error starting should be had.The safety device of prior art or there is the hidden danger of components and parts fault, or there is complex structure, the potential safety hazard of poor reliability.
Such as, technical scheme disclosed in CN201231350A, its safety device comprises the microswitch be connected on motor switch, once microswitch lost efficacy, just may cause personal injury.Technical scheme disclosed in CN102528155A is the interactional motion of multi link, complex structure; part manufactures, installation accuracy requires high; not only manufacturing cost is high, and under the situation that scale is produced in enormous quantities, product percent of pass, security reliability decline to a great extent.
Summary of the invention
For solving the deficiencies in the prior art, the object of the invention is: provide a kind of electric circular saw with flexible blade guard, when nature, locking movable shield and motor switch, make saw blade not expose, ability starter motor switch after only having releasing movable shield to lock; When changing saw blade when opening protective cover, forbidding that motor switch starts, avoiding error to cause personal injury, possess structure simple simultaneously, easy to operate, with low cost, safe and reliable advantage.
To achieve these goals, the present invention adopts following technical scheme:
There is the electric circular saw of flexible blade guard, comprise casing, motor, motor switch, start stop lever and floor, described start stop lever is rotatably arranged on the inwall of casing by bearing pin, it there is switch trigger lock, the base plate that can rotate around casing head lamp brush guard pivot, described base plate is fixed with protective cover and support, have elastic component between base plate and casing, it is characterized in that: described electric circular saw also comprises pin, described pin and start stop lever link, rotate around bearing pin, support-moving is stoped when start stop lever lock out motor switch, pin rotation offset when unlocking, hook, for hooking or releasing bracket, described hook has the stopping means rotated for limiting pin, the stopping means described in when releasing bracket props up pin, limits it and rotates, hook control device, hook can be rotated certain angle and lock by described hook control device, and the hook control device after locking can reset under support effect.
As the further prioritization scheme of technical solution of the present invention, described pin and start stop lever are overall structures.
Described hook is rotatably arranged on the inwall of casing by bearing pin, and described hook has back-moving spring, and the distance that the front end of hook is rotated is greater than hook portion length.
Described hook control device comprises: a rotating disk, be installed to the inwall of housing by bearing pin, bearing pin is connected with the knob of hull outside, rotating disk has bayonet socket and projection, rotating disk is provided with elastic reset member, orders about rotating disk and press to clockwise limited block on housing under nature; A jockey, for connecting rotating disk and hook; A rotating disk locking device, described rotating disk locking device is the escapement bar with button pawl, escapement bar is rotatably arranged on enclosure interior, and is provided with flexible member and forces it to be pressed against clockwise on rotating disk, and the drive end of escapement bar can force escapement bar to be rotated counterclockwise under supporting role.
Described rotating disk and hook connecting connection device, at least one end is rotatably connected, the rotating bar linkage structure in two ends can be adopted, also one end can be adopted to fix, the structure that other end pin keyway connects, connecting rod one end of preferred jockey is connected with hook one, and the other end is fixed with pin, and described pin inserts in the keyway of rotating disk.
Described escapement bar nature does not contact with support, and when locking rotating disk, escapement bar rotates clockwise, and escapement bar drive end enters Support Channel.
Enter the prioritization scheme of, described rotating disk, can metallic stamping pieces be adopted, can effectively reduce costs.
In its natural state, support moves upward and to be limited by pin, and move downward by hook restriction, therefore base plate is locked, the brake component locking switch trigger on Simultaneous Switching control lever, thus ensures that electric circular saw is not misused.
During electric circular saw startup work, operator promotes push button, and start stop lever rotates around bearing pin, pin pivot offset, and remove support and upwards lock, retainer breaks away from switch trigger simultaneously, and electric circular saw just starts by pressing switch trigger.
When changing saw blade, rotate counterclockwise knob, rotating disk rotates counterclockwise under knob effect, drive hook rotates counterclockwise, after the hook portion linked up with deviates to support chute, base plate drives support to deviate from housing under the action of the spring, expose saw blade, escapement bar is under flexible member effect, rotate clockwise, drive end enters Support Channel, button dog clutch enters rotating disk, locking rotating disk, rotating disk pins hook again, scotch on hook props up pin, stop it to rotate, thus locking switch trigger, drive end due to escapement bar is positioned at the support passage of enclosure interior, the external world cannot touch, therefore saw blade can be changed safely.
After sawblade-replacing completes, as long as base plate is pressed to housing, support admission passage, promote escapement bar to be rotated counterclockwise, after button pawl throws off rotating disk, rotating disk is under flexible member effect, turn clockwise, drive hook to rotate clockwise, forward the limited block position on housing when rotating disk to, stop operating by stop, the hook portion on hook enters the chute in support again, now, scotch on hook no longer props up pin, promote push button, depress switch trigger, electric circular saw gets final product work.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described, wherein:
Fig. 1 is the structure chart that the present invention has the preferred embodiment of the electric circular saw of flexible blade guard;
Fig. 2 is the structure chart that the present invention removes pin, start stop lever, hook;
Fig. 3 is the structural representation after the present invention removes hook;
Fig. 4 is that the present invention is broken off relations view;
Fig. 5 is structural perspective of the present invention.
Detailed description of the invention
Fig. 1-Fig. 5 is the preferred embodiments that the present invention has the electric circular saw of flexible blade guard.
Conveniently express, following " left side " " right side ", " clockwise " are all consistent with direction shown in accompanying drawing with " counterclockwise ".
As shown in the figure, electric circular saw 1 of the present invention comprises a housing 10 and motor 11 and the saw blade 12 be arranged in wherein, motor 11 is connected to described saw blade 12 by gear-box, switch trigger 13 is disposed in the handle portion of housing 10, for switching on power, and starter motor 11, electric circular saw 1 also comprises a base plate 14, be pivotally connected to shell 10 by pivot 20, spring 15 is arranged between housing 10 and base plate 14, and both promotions are separated.Base plate 14 is provided with support 16 and a guard shield 17, supports 16 upper hopper chutes, guard shield 17, for surrounding saw blade 12, supports 16 and can insert housing 10 along the passage in housing, and in addition, base plate 14 has edge of a knife (not shown) to pass through for saw blade 12.
As shown in Figure 1-2, electric circular saw 1 also comprises start stop lever 18, described start stop lever 18 is rotatably installed on the bearing pin of housing 10 inwall, retainer 181 is between start stop lever 18 and switch trigger 13, by the rotation of start stop lever 18, retainer 181 is entered or departs from the stroke range of trigger 13 switch, thus gauge tap trigger 13.Specifically, switch trigger 13 has the pressing stroke towards the handle portion of housing 10, and retainer 181 stretches out from start stop lever to switch trigger, pins pressing stroke, thus limits current lead-through.Start stop lever 18 is provided with an elastic component 182, for forcing described retainer 181 to reset to switch trigger 13, thus in its natural state, electric circular saw 1 cannot start.This elastic component 182 can realize in many ways, and such as, it can be arranged on compression spring between the inwall of housing 10 and start stop lever 18, also can be the torque spring being arranged on start stop lever 18 bearing pin position.Start stop lever 18 is connected with the push button 183 on housing 10, and operator promotes push button 183, and start stop lever 18 rotates around bearing pin, and after retainer 181 breaks away from switch trigger 13, electric circular saw 1 just starts by pressing switch trigger 13.
Start stop lever 18 bottom have with its one pin 184, in its natural state, pin 184 can with support 16 top contact, stop it to move upward, after push button 183 pull switch control lever 18 rotates a certain angle, pin 184, around bearing pin deflection, removes the upwards locking to support 16.With pivot 20 for the center of circle, bottom pin 184 and and the arc angle that supports 16 tops be less than saw blade 12 lower extreme point to the arc angle gone out between the edge of a knife, thus stop saw blade 12 to expose from going out the edge of a knife.
Electric circular saw 1 also comprises the hook 19 be arranged in housing 10, and described hook 19 is rotatably installed in the inwall of housing 10 by bearing pin, and its coupler body can insert in the chute of support 16, the moving range of restriction support 16.Linking up with 19 flexible parts 192, linking up with angle for keeping, base plate 14 relative to housing 10 around the slewing area of bearing pin by the restriction of the length range of sliding tray 161, in its natural state, the trend of base plate counterclockwise movement is under the action of the spring linked up with pinning.Hook 19 has retainer 191, and described retainer 191 is axial projection or pin, and when hook rotates a certain angle, when coupler body departs from the chute supported, retainer 191 props up pin 184, stops it to rotate.
As Fig. 3, shown in 4, electric circular saw 1 also comprises a hook control unit 21, rotate for controlling described hook 19, described hook control unit 21 comprises, a rotating disk 211, the inwall of housing 10 is installed to by bearing pin 212, bearing pin is connected with the knob (not shown in FIG.) of hull outside, rotating disk 211 can be made up of metallic stamping pieces, on have bayonet socket and block, rotating disk 211 is connected with hook 19, turning knob, rotating disk 211 is driven to rotate, and then drive hook 19 to rotate, rotating disk 211 bearing pin is provided with elastic reset member, order about rotating disk 211 under nature and press to clockwise limited block 213 on housing, a jockey 215, for connecting rotating disk 211 and hook 19, a rotating disk locking device, described rotating disk locking device is its flexible member rotated of escapement bar 214 and driving with button pawl, escapement bar 214 is rotatably arranged on enclosure interior, flexible member forces it to be pressed against on rotating disk 21, and the drive end of escapement bar 214 can be rotated counterclockwise under support 16 promotes.
In its natural state, the button pawl of escapement bar 214 rests on rotating disk 211, drive end does not contact with support 16, when rotating disk 211 rotates counterclockwise under knob effect, hook 19 is driven to rotate counterclockwise, hook 19 hook portion deviate from support 19 chute after, base plate 14 drives support 16 to deviate from housing 10 under the action of the spring, expose saw blade 12, escapement bar 214 is under flexible member effect, rotate clockwise, drive end enters the passage of support 16, button dog clutch enters rotating disk 214 bayonet socket, locking rotating disk 211, rotating disk 211 pins hook 19 again, retainer 191 on hook 19 props up pin 184, stop it to rotate, thus locking switch trigger 13, drive end due to escapement bar 214 is positioned at the passage that enclosure interior supports 16, the external world cannot touch, do not worry that contingency unlocks, therefore saw blade can be changed safely.
After saw blade 12 has been changed, as long as base plate 14 is pressed to housing 10, support 16 admission passages, promote escapement bar 214 to be rotated counterclockwise, after button pawl throws off rotating disk 214, rotating disk 214 is under flexible member effect, turn clockwise, hook 19 is driven to rotate clockwise, limited block 213 position on housing 10 is forwarded to when rotating disk 214, stop operating by stop, hook portion on hook 19 enters the chute in support 16 again, now, scotch 191 on hook 19 no longer props up pin, relieve the locking of switch 13, promote push button 183, depress switch 13 trigger, electric circular saw gets final product work.
Claims (9)
1. there is the electric circular saw of flexible blade guard, comprise casing, motor, motor switch, start stop lever and floor, described start stop lever is rotatably arranged on the inwall of casing by bearing pin, it there is switch trigger lock, the base plate that can rotate around casing head lamp brush guard pivot, described base plate is fixed with protective cover and support, have elastic component between base plate and casing, it is characterized in that: described electric circular saw also comprises pin, described pin and start stop lever link, rotate around bearing pin, support-moving is stoped when start stop lever lock out motor switch, pin rotation offset when unlocking, hook, for hooking or releasing bracket, described hook has the stopping means rotated for limiting pin, the stopping means described in when releasing bracket props up pin, limits it and rotates, hook control device, hook can be rotated certain angle and lock by described hook control device, and the hook control device after locking can reset under support effect.
2. electric circular saw according to claim 1, is characterized in that described pin and start stop lever are overall structures.
3. electric circular saw according to claim 1, is characterized in that described hook is rotatably arranged on the inwall of casing by bearing pin, described hook is provided with the flexible member for resetting, and the distance that the front end of hook is rotated is greater than hook portion length.
4. electric circular saw according to claim 1, is characterized in that the stopping means that described hook rotates for limiting pin is the pin-shaped projection being fixed on hook.
5. electric circular saw according to claim 1, it is characterized in that described hook control device comprises: a rotating disk, the inwall of housing is installed to by bearing pin, bearing pin is connected with the knob of hull outside, rotating disk there are bayonet socket and projection, rotating disk is provided with elastic reset member, orders about rotating disk and press to clockwise limited block on housing under nature; A jockey, for connecting rotating disk and hook; A rotating disk locking device, described rotating disk locking device is the escapement bar with button pawl, escapement bar is rotatably arranged on enclosure interior, and is provided with flexible member and forces it to be pressed against clockwise on rotating disk, and the drive end of escapement bar can force escapement bar to be rotated counterclockwise under supporting role.
6. hook control device according to claim 4, is characterized in that described rotating disk is metallic stamping pieces.
7. hook control device according to claim 4, is characterized in that described escapement bar nature does not contact with support, and when locking rotating disk, escapement bar rotates clockwise, and escapement bar drive end enters Support Channel.
8. hook control device according to claim 4, it is characterized in that described rotating disk and hook connecting connection device, at least one end is rotatably connected.
9. hook control device according to claim 7, it is characterized in that connecting rod one end of described jockey is connected with hook one, the other end is fixed with pin, and described pin inserts in the keyway of rotating disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510454530.8A CN105269067A (en) | 2015-07-23 | 2015-07-23 | Electric circular saw with movable protection cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510454530.8A CN105269067A (en) | 2015-07-23 | 2015-07-23 | Electric circular saw with movable protection cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105269067A true CN105269067A (en) | 2016-01-27 |
Family
ID=55139386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510454530.8A Pending CN105269067A (en) | 2015-07-23 | 2015-07-23 | Electric circular saw with movable protection cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105269067A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105921811A (en) * | 2016-06-20 | 2016-09-07 | 宁波市天铭工具有限公司 | Handheld electric circular saw |
| CN109202172A (en) * | 2017-06-30 | 2019-01-15 | 苏州宝时得电动工具有限公司 | Portable electric annular saw |
-
2015
- 2015-07-23 CN CN201510454530.8A patent/CN105269067A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105921811A (en) * | 2016-06-20 | 2016-09-07 | 宁波市天铭工具有限公司 | Handheld electric circular saw |
| CN105921811B (en) * | 2016-06-20 | 2018-08-24 | 宁波市天铭工具有限公司 | A kind of hand electric annular saw |
| CN109202172A (en) * | 2017-06-30 | 2019-01-15 | 苏州宝时得电动工具有限公司 | Portable electric annular saw |
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| DD01 | Delivery of document by public notice |
Addressee: Chen Jianlun Document name: Notification of before Expiration of Request of Examination as to Substance |
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| DD01 | Delivery of document by public notice | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160127 |
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| WD01 | Invention patent application deemed withdrawn after publication |