CN104942362A - Electric circular saw - Google Patents
Electric circular saw Download PDFInfo
- Publication number
- CN104942362A CN104942362A CN201410112074.4A CN201410112074A CN104942362A CN 104942362 A CN104942362 A CN 104942362A CN 201410112074 A CN201410112074 A CN 201410112074A CN 104942362 A CN104942362 A CN 104942362A
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- CN
- China
- Prior art keywords
- guard shield
- locking piece
- circular saw
- electric circular
- push rod
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses an electric circular saw comprising a shell, an output shaft extending out of the shell, a saw blade arranged on the output shaft and a protective cover used for containing the saw blade. The protective cover comprises a fixed protective cover body and a movable protective cover body, wherein the fixed protective cover body is fixed to the shell, and the movable protective cover body can be arranged on the fixed protective cover body in a riveted mode. The movable protective cover body is provided with a locking piece capable of locking the movable protective cover body to the fixed protective cover body and unlocking the movable protective cover body. Besides, the electric circular saw further comprises a driving switch assembly capable of locking/unlocking the locking piece relative to the fixed protective cover body. When moving, the driving switch assembly can enable the locking piece to move, so that the locking piece unlocks the movable protective cover body. It is only required that the electric circular saw is easily driven (such as press), and then the driving switch assembly can control the locked/unlocked state of the protective cover. Compared with the prior art, the safety of an operator is protected, and the human-machine use effect of the electric circular saw can be further improved.
Description
Technical field
The present invention relates to electric-powered field of tool, particularly relate to a kind of electric circular saw.
Background technology
Electric circular saw can damage human body under saw blade High Rotation Speed; in order to avoid the generation of injury; industry proposes the safety shield being outside equipped with mobilizable guard shield at the saw blade of electric circular saw; this structure can make saw blade can not expose in a free state, also would not damage human body.But adopt artificial fixed form to be fixed movable shield in prior art, in use need repeatedly action or multiple step that guard shield can be made to move, the man-machine result of use that these loaded down with trivial details actions bring to operator is poor.
Summary of the invention
Based on this, be necessary for the problems referred to above, provide a kind of and can improve man-machine result of use and there is the electric circular saw of safety protection function.
A kind of electric circular saw, comprising casing, extending the output shaft of described casing, being arranged on the saw blade on described output shaft and the guard shield for accommodating described saw blade; Described guard shield comprise fix with described casing determine guard shield and can pivotable at the described dynamic guard shield determined on guard shield, described dynamic guard shield be provided with can with the described locking piece determining guard shield locking/unlocking, described electric circular saw also comprises can make the relatively described driving switch assembly determining guard shield locking/unlocking of described locking piece; When driving described driving switch assembly to move, described driving switch assembly can make described locking piece produce change in displacement, and described locking piece is removed the described locking determining guard shield.
Wherein in an embodiment, the securing rod that described driving switch assembly comprises pivotable switch trigger on the housing, abut against with described switch trigger and the push rod be connected with described securing rod, the receiving space for accommodating described securing rod is provided with in described casing, described securing rod can movement be arranged in described receiving space, one end of described push rod abuts with described locking piece; When pressing described switch trigger movement, described switch spanner machine can drive described securing rod to move and make described locking piece produce change in displacement by described push rod.
Wherein in an embodiment, described switch trigger is provided with the first contact surface, and described securing rod is provided with the second contact surface, and described first contact surface and described second contact surface abut against and can relative motion under the effect of described switch trigger pressing force.
Wherein in an embodiment, described first contact surface and/or described second contact surface are inclined-plane or cam surface.
Wherein in an embodiment, described push rod comprises push rod main part, the second free end that described push rod main part is provided with the fulcrum fixed with described casing, the first free end be connected with described securing rod and abuts with described locking piece, described first free end and described second free end can around described fulcrum.
Wherein in an embodiment, described fulcrum is located at one end of described push rod main part, and described second free end is arranged on the other end of described push rod main part, and described first free end is between described fulcrum and described second free end.
Wherein in an embodiment, described first free end is located at one end of described push rod main part, and described second free end is arranged on the other end of described push rod main part, and described fulcrum is between described first free end and described second free end.
Wherein in an embodiment, the pressing plate that described dynamic guard shield also comprises dynamic boot main body portion and is fixedly connected with described dynamic boot main body portion, described locking piece pivotable is in described dynamic boot main body portion.
Wherein in an embodiment, described dynamic guard shield also comprises the torsion spring be located in described dynamic boot main body portion, described torsion spring has the torsion spring main part be fixed in described dynamic boot main body portion, the first end extended by described torsion spring main part two ends and the second end, described first end and described dynamic boot main body portion abut against, and described the second end and described locking piece abut against.
Wherein in an embodiment, described locking piece is the flexible piece with elastic deformation recovery capability.
Above-mentioned electric circular saw comprises the guard shield for accommodating saw blade and can make the driving switch assembly of guard shield locking/unlocking.Wherein, guard shield comprise fix with casing determine guard shield and pivotable can determine the dynamic guard shield on guard shield, dynamic guard shield is provided with can with the locking piece determining guard shield locking/unlocking.When driving switch assembly moves, driving switch assembly can make locking piece produce change in displacement, thus makes the locking of locking piece releasing to dynamic guard shield.Above-mentioned electric circular saw only needs simple driving (as by actions such as pressings) driving switch assembly namely can control the locking/unlocking state of guard shield; its prior art of comparing, can also improve the man-machine result of use of electric circular saw while having operator safety defencive function.
Accompanying drawing explanation
Fig. 1 is the front view of electric circular saw under guard mode;
Fig. 2 be electric circular saw in working order under front view;
Fig. 3 be in electric circular saw guard shield locking piece in off position under main sectional view;
Fig. 4 is locking piece main sectional view in the on state in electric circular saw guard shield;
Fig. 5 is the main sectional view of Electrotrephine case;
Fig. 6 is B place partial structurtes enlarged drawing in Fig. 4;
Fig. 7 is the sectional view at A-A place in the first embodiment of Fig. 1 electric circular saw;
Fig. 8 is the sectional view at A-A place in Fig. 1 electric circular saw the second embodiment.
Wherein, concrete element reference numeral is listed as follows:
100, electric circular saw 110, casing 111, receiving space
112, pivotal axis 120, output shaft 130, saw blade
140, guard shield 141,241, determine guard shield 142,242, dynamic guard shield
1421, dynamic boot main body portion 1422, pressing plate 1423, to block
143,243, locking piece 144, torsion spring 1441, torsion spring main part
1442, first end 1443, the second end 150, driving switch assembly
151,251, switch trigger 1511, first contact surface 152,252, securing rod
1521, the second contact surface 153,253, push rod 1531,2531, push rod main part
1532,2532, fulcrum 1533,2533, first free end 1534,2,534 second free end
254, connecting rod 161, first flexible member 162, second flexible member
Detailed description of the invention
Illustrate: " front " described in present embodiment refers to towards the direction of saw blade, described " rear " refers to the direction contrary with saw blade.
Please refer to the drawing 1 to Fig. 4, present embodiment discloses a kind of electric circular saw 100, comprise casing 110, extend the output shaft 120 of casing 110, the saw blade 130 be arranged on output shaft 120, for accommodating the guard shield 140 of saw blade 130 and the driving switch assembly 150 of guard shield 140 locking/unlocking can being made.Guard shield 140 comprises and fixing the determining guard shield 141 and pivotable can determine the dynamic guard shield 142 on guard shield 141 of casing 110, and dynamic guard shield 142 is provided with can with the locking piece 143 determined guard shield 141 and lock or unlock.One end of driving switch assembly 150 abuts mutually with locking piece 143.
In present embodiment, dynamic guard shield 142 also comprises dynamic boot main body portion 1421, locking piece 143 can pivotable in dynamic boot main body portion 1421.In use procedure, during pressing driving switch assembly 150, one end of locking piece 143 produces change in displacement under the abutting power effect of driving switch assembly 150, and make guard shield 142 relatively determine guard shield 141 to unlock, now guard shield 141 rotary folding determined relatively by dynamic guard shield 142, electric circular saw 100 is in running order, please refer to the drawing 2 and Fig. 4.When driving switch assembly 150 recovers initial position; the abutting power to locking piece 143 removed by driving switch assembly 150; locking piece 143 returns to initial position; and make guard shield 142 relatively determine guard shield 141 recovery locking; now guard shield 141 rotary expansion determined relatively by dynamic guard shield 142; electric circular saw 100 is in guard mode, please refer to the drawing 1 and Fig. 3.Above-mentioned electric circular saw 100 only needs simple press driving switch assembly 150 namely can control the locking/unlocking state of guard shield 140; its prior art of comparing, can also improve the man-machine result of use of electric circular saw 100 while having operator safety defencive function.It is to be noted, in other embodiments, can also be spaced a distance between one end of driving switch assembly 150 and locking piece 143, as long as can meet when pressing driving switch assembly 150, driving switch assembly 150 can be pushed against on locking piece 143 and to make locking piece 143 produce the function that dynamic guard shield 142 can be unlocked.
In order to ensure when driving switch assembly 150 recovers initial position, locking piece 143 also can return to initial position thereupon.Dynamic guard shield 142 also comprises the torsion spring 144 be located in dynamic boot main body portion 1421.Torsion spring 144 has the torsion spring main part 1441 be fixed in dynamic boot main body portion 1421, the first end 1442 extended by torsion spring main part 1441 two ends and the second end 1443.Dynamic boot main body portion 1421 is provided with one and supports block 1423, and first end 1442 is abutted against with dynamic boot main body portion 1421 by the above-mentioned block 1423 that supports, and the second end 1443 abuts against with one end of locking piece 143.It is pointed out that in other embodiments, locking piece 143 can also be the flexible piece inherently with elastic deformation recovery capability, as long as can meet locking piece 143 function that can reset after external force is removed.
Please refer to the drawing 5 and Fig. 6, driving switch assembly 150 comprises the switch trigger 151 of pivotable on casing 110, the securing rod 152 that abuts against with switch trigger 151 and the push rod 153 be connected with securing rod 152.Be provided with the receiving space 111 for accommodating securing rod 152 in casing, securing rod 152 can movement be arranged in receiving space 111, one end of push rod 153 abuts mutually with locking piece 143.Casing 110 is provided with pivotal axis 112, and one end of switch trigger 151 is fixed on also can with pivotal axis 112 for axle center moves pivotally on pivotal axis 112.When press switch trigger 151 produce move pivotally time, switch trigger 151 can drive securing rod 152 to move and make locking piece 143 produce change in displacement by push rod 153, and makes guard shield 142 relatively determine guard shield 141 to unlock.It is to be noted, in other embodiments, one end and the locking piece 143 of push rod 153 can also be spaced a distance, as long as can meet when pressing switch trigger 151, one end of push rod 153 can be pushed against on locking piece 143 and to make locking piece 143 produce the function that dynamic guard shield 142 can be unlocked.
Please refer to the drawing 6, switch trigger 151 is provided with the first contact surface 1511, and securing rod 152 is provided with the second contact surface 1521, first contact surface 1511 and abuts with the second contact surface 1521 and can relative motion under the effect of switch trigger 151 pressing force.When external force order about switch trigger 151 rotate time, produce relative motion between the second contact surface 1521 and the first contact surface 1511, this motion can drive securing rod 152 to move forward.In order to make the relative motion between switch trigger 151 and securing rod 152 more smooth and easy, in present embodiment, first contact surface 1511 is lower in the mutual surface roughness located that abuts with the second contact surface 1521, and the first contact surface 1511 can, for the inclined-plane mutually abutted, also can be cam surface with the second contact surface 1521.It is pointed out that in other embodiments, the shape of the first contact surface 1511 and the second contact surface 1521 is not specifically limited, as long as can meet the function that can make to produce relative motion between switch trigger 151 and securing rod 152.
Please refer to the drawing 7, the first flexible member 161 and the second flexible member 162 is also provided with between switch trigger 151 and securing rod 152, first flexible member 161 is consistent with the moving direction of securing rod 152, and the second flexible member 162 is consistent with the pivotal orientation of switch trigger 151.When pressing switch trigger 151, the first contact surface 1511 abuts with the second contact surface 1521 is oblique, and locking piece 143 moves under the effect of above-mentioned abutting power.Now, the first flexible member 161 and the second flexible member 162 are all in compressive state; When after the pressing force on cancel switch trigger 151, under the effect of the elastic restoring force of the second flexible member 162, switch trigger 151 resets, and meanwhile, under the effect of the elastic restoring force of the first flexible member 161, securing rod 152 resets.First flexible member 161 and the second flexible member 162 can be but be not limited to spring part.
Please refer to the drawing 7 and Fig. 8, Fig. 7 and Fig. 8 disclose securing rod 152, and 252, push rod 153,253 and locking piece 143, two kinds between 243 different syndeton schematic diagrames.Wherein, push rod 153,253 comprise push rod main part 1531,2531, push rod main part 1531,2531 is provided with fulcrum 1532 that can be fixing with casing, 2532, with securing rod 152,252 connect the first free ends 1533,2533 and with locking piece 143,243 the second free ends 1534 abutted against, 2534, first free end 1533,2533 and the second free end 1534,2534 can around fulcrum.
Figure 7 shows that the first syndeton between securing rod 152, push rod 153 and locking piece 143, fulcrum 1532 in figure is located at one end of push rod main part 1531, first free end 1533 is positioned at the middle part of push rod main part 1531, and the second free end 1534 is arranged on the other end of push rod main part 1531.In use procedure, during pressing switch trigger 151, securing rod 152 drives the first free end 1533 to move forward under the effect of switch trigger 151, now the second free end 1534 moves forward around fulcrum under the above-mentioned force, finally be pushed against on locking piece 143, and make guard shield 142 relatively determine guard shield 141 to unlock.
Figure 8 shows that the second syndeton between securing rod 252, push rod 253 and locking piece 243, fulcrum 2532 in figure is positioned at the middle part of push rod main part 2531, first free end 2533 is located at one end of push rod main part 2531, and the second free end 2534 is arranged on the other end of push rod main part 2531.In present embodiment, between securing rod 252 and push rod 253, be also connected with the connecting rod 254 for playing guide effect.In use procedure, during pressing switch trigger 251, securing rod 252 drives the first free end 2533 to move forward under the effect of switch trigger 251, now the second free end 2534 moves backward around fulcrum under the above-mentioned force, finally be pushed against on locking piece 143, and make guard shield 242 relatively determine guard shield 241 to unlock.
In addition, dynamic guard shield 141 also comprises the pressing plate 1422 be fixedly connected with dynamic boot main body portion 1411.In use, when dynamic guard shield 142 is determined after guard shield 141 unlocks relatively, operating personnel by pressing plate 1422 by being pressed on workpiece to be processed, pressing plate 1422 is under the effect of above-mentioned pressing force, guard shield 142 can be made relatively to determine guard shield 141 rotary folding, now, come out in the driven guard shield 142 of saw blade 130 and can carry out cutting operation to workpiece, electric circular saw 100 is in the duty shown in Fig. 2.When operating personnel remove the effect to the pressing force of pressing plate 1422; pressing plate 1422 resets and makes guard shield 142 rotary expansion and be housed in by saw blade 130 in dynamic guard shield 142; now by removing the pressing force to switch trigger 151; thus guard shield 142 can be made relatively to determine guard shield 141 recover lock-out state, namely electric circular saw 100 is in the guard mode shown in Fig. 1.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an electric circular saw, comprising casing, extending the output shaft of described casing, being arranged on the saw blade on described output shaft and the guard shield for accommodating described saw blade; It is characterized in that: described guard shield comprise fix with described casing determine guard shield and can pivotable at the described dynamic guard shield determined on guard shield, described dynamic guard shield be provided with can with the described locking piece determining guard shield locking/unlocking, described electric circular saw also comprises can make the relatively described driving switch assembly determining guard shield locking/unlocking of described locking piece; When driving described driving switch assembly to move, described driving switch assembly can make described locking piece produce change in displacement, and described locking piece is removed the described locking determining guard shield.
2. electric circular saw according to claim 1, it is characterized in that, the securing rod that described driving switch assembly comprises pivotable switch trigger on the housing, abut against with described switch trigger and the push rod be connected with described securing rod, the receiving space for accommodating described securing rod is provided with in described casing, described securing rod can movement be arranged in described receiving space, one end of described push rod abuts with described locking piece; When pressing described switch trigger movement, described switch spanner machine can drive described securing rod to move and make described locking piece produce change in displacement by described push rod.
3. electric circular saw according to claim 2, it is characterized in that, described switch trigger is provided with the first contact surface, and described securing rod is provided with the second contact surface, and described first contact surface and described second contact surface abut against and can relative motion under the effect of described switch trigger pressing force.
4. electric circular saw according to claim 3, is characterized in that, described first contact surface and/or described second contact surface are inclined-plane or cam surface.
5. electric circular saw according to claim 2, it is characterized in that, described push rod comprises push rod main part, the second free end that described push rod main part is provided with the fulcrum fixed with described casing, the first free end be connected with described securing rod and abuts with described locking piece, described first free end and described second free end can around described fulcrum.
6. electric circular saw according to claim 5, it is characterized in that, described fulcrum is located at one end of described push rod main part, and described second free end is arranged on the other end of described push rod main part, and described first free end is between described fulcrum and described second free end.
7. electric circular saw according to claim 5, it is characterized in that, described first free end is located at one end of described push rod main part, and described second free end is arranged on the other end of described push rod main part, and described fulcrum is between described first free end and described second free end.
8. electric circular saw according to claim 1, is characterized in that, the pressing plate that described dynamic guard shield also comprises dynamic boot main body portion and is fixedly connected with described dynamic boot main body portion, and described locking piece pivotable is in described dynamic boot main body portion.
9. electric circular saw according to claim 8, it is characterized in that, described dynamic guard shield also comprises the torsion spring be located in described dynamic boot main body portion, described torsion spring has the torsion spring main part be fixed in described dynamic boot main body portion, the first end extended by described torsion spring main part two ends and the second end, described first end and described dynamic boot main body portion abut against, and described the second end and described locking piece abut against.
10. electric circular saw according to claim 1, is characterized in that, described locking piece is the flexible piece with elastic deformation recovery capability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410112074.4A CN104942362B (en) | 2014-03-24 | 2014-03-24 | Electric circular saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410112074.4A CN104942362B (en) | 2014-03-24 | 2014-03-24 | Electric circular saw |
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| Publication Number | Publication Date |
|---|---|
| CN104942362A true CN104942362A (en) | 2015-09-30 |
| CN104942362B CN104942362B (en) | 2017-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410112074.4A Active CN104942362B (en) | 2014-03-24 | 2014-03-24 | Electric circular saw |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105904024A (en) * | 2016-06-20 | 2016-08-31 | 宁波市天铭工具有限公司 | Electric circular saw |
| CN105921811A (en) * | 2016-06-20 | 2016-09-07 | 宁波市天铭工具有限公司 | Handheld electric circular saw |
| CN105921812A (en) * | 2016-06-20 | 2016-09-07 | 宁波市天铭工具有限公司 | Handheld electric circular saw |
| CN106964836A (en) * | 2016-01-13 | 2017-07-21 | 株式会社牧田 | Cutting machine |
| CN107283368A (en) * | 2016-04-01 | 2017-10-24 | 苏州宝时得电动工具有限公司 | Hand-held tool and its operating method |
| CN110508868A (en) * | 2019-07-31 | 2019-11-29 | 浙江开创电气股份有限公司 | Electric circular saw |
| CN113385318A (en) * | 2020-03-12 | 2021-09-14 | 苏州宝时得电动工具有限公司 | Spray gun and spray gun control method |
| TWI745199B (en) * | 2020-12-21 | 2021-11-01 | 力山工業股份有限公司 | Foldable miter saw with safety device |
| GB2600961A (en) * | 2020-11-12 | 2022-05-18 | Evolution Power Tools Ltd | A handheld circular saw |
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| CN106964836A (en) * | 2016-01-13 | 2017-07-21 | 株式会社牧田 | Cutting machine |
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| 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 |
| CN110508868A (en) * | 2019-07-31 | 2019-11-29 | 浙江开创电气股份有限公司 | Electric circular saw |
| CN113385318A (en) * | 2020-03-12 | 2021-09-14 | 苏州宝时得电动工具有限公司 | Spray gun and spray gun control method |
| GB2600961A (en) * | 2020-11-12 | 2022-05-18 | Evolution Power Tools Ltd | A handheld circular saw |
| GB2600961B (en) * | 2020-11-12 | 2023-05-03 | Evolution Power Tools Ltd | A handheld circular saw |
| TWI745199B (en) * | 2020-12-21 | 2021-11-01 | 力山工業股份有限公司 | Foldable miter saw with safety device |
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| CN104942362B (en) | 2017-08-25 |
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