CN105458398A - Portable circular saw - Google Patents
Portable circular saw Download PDFInfo
- Publication number
- CN105458398A CN105458398A CN201410455180.2A CN201410455180A CN105458398A CN 105458398 A CN105458398 A CN 105458398A CN 201410455180 A CN201410455180 A CN 201410455180A CN 105458398 A CN105458398 A CN 105458398A
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- housing
- guard shield
- circular saw
- work
- contact
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Abstract
The invention provides a portable circular saw. The portable circular saw comprises a saw blade, a motor, a shell, a protecting hood and a rebound mechanism, wherein the shell comprises a contact part making contact with the surface of a workpiece; the protecting hood is mounted on the shell and is moved relative to the shell between the first position where the saw blade is not exposed out of an opening and the second position where at least part of the saw blade is exposed out of the opening; the rebound mechanism is used for enabling the protecting hood to be moved relative to the shell to the first position from the second position. The saw blade is perpendicular to the surface of the workpiece, and when the protecting hood and the shell make contact with the surface of the workpiece at the same time, the protecting hood is in one-point contact with the surface of the workpiece, and the shell is also in one-point contact with the surface of the workpiece; the whole circular saw cannot be sufficiently supported only through contact at two points, so that the portable circular saw topples over the surface of the workpiece once the circular saw is not held by an operator; accordingly, the rebound mechanism can easily reset the protecting hood to the first position without overcoming the gravity of the whole circular saw, namely the saw blade cannot be exposed out of the opening, and safety is greatly improved.
Description
Technical field
The present invention relates to a kind of power tool, especially relate to a kind of portable circular saw.
Background technology
Traditional portable circular saw, as depicted in figs. 1 and 2, generally includes: motor; Saw blade 200; For transmitting the transmission mechanism of power between motor and saw blade 200; Housing 202, this housing 202 comprises housing anterior 204 and housing rear portion 206; Housing front portion 204 is used for accommodating at least part of saw blade 200, and housing rear portion 206 is used for accommodating motor; Be connected to the guard shield 208 of housing front portion 204 rotationally, this guard shield 208 to comprise bottom guard shield 210, bottom guard shield, 210 comprise for the supporting surface 214 against surface of the work 212 and therefrom expose opening 216 for saw blade 200, and saw blade 200 exposes with processing work from opening 216.Guard shield 208 is anterior relative to housing 204 rotating from primary importance to the second place, when guard shield 208 is positioned at primary importance, saw blade 200 is not exposed to opening 216, and when guard shield 208 is positioned at the second place, what saw blade 200 was at least part of is exposed to opening 216 for workpiece.Rebounding mechanism is provided with between guard shield 208 and housing front portion 204, be provided for guard shield 208 and relatively move to primary importance from the second place in housing front portion 204, namely after cutting work completes, this rebounding mechanism can make this guard shield 208 be positioned at primary importance, make saw blade 200 not expose opening 216, avoid accidentally injuring operator.This kind of portable circular saw, due to motor is arranged on housing rear portion 206, is so arranged so that operator grips pleasant, and structure relative compact, easy to operate.
But, the supporting surface 214 of traditional portable circular saw is roughly rectangle, therefore, bottom guard shield, 210 with when contacting with surface of the work 212 while of 202 housings, bottom guard shield, 210 is linear contact lay with surface of the work 212, even if now housing 202 and surface of the work 212 are point cantact, after this annular saw of operator's inoperation, what this portable circular saw also can be stable is shelved on surface of the work 212.So, guard shield 208 is then reset to primary importance because difficulty overcomes the gravity of whole machine very much by rebounding mechanism, and that is, when operator's inoperation portable circular saw, saw blade 200 is exposed to opening 216, like this, then there is very large potential safety hazard.
Summary of the invention
Technical problem to be solved by this invention is to provide the high portable circular saw of a kind of security.
In order to solve the problem, the invention provides a kind of portable circular saw, comprising: saw blade; Motor, for driving described saw blade; Housing, described housing comprises interconnective housing front portion and housing rear portion; Housing front portion is used for accommodating part saw blade, and housing rear portion is used for accommodating described motor; Described housing also comprises for contacting surface of the work contact site; Be installed on the guard shield of housing front portion, described guard shield comprises bottom guard shield, comprise the opening therefrom exposed for described saw blade bottom described guard shield, described guard shield not to be exposed between the primary importance of described opening and at least part of second place being exposed to described opening of described saw blade at described saw blade relative to described housing and to move; Also comprise for contacting surface of the work butting section bottom described guard shield; Rebounding mechanism, described rebounding mechanism is provided for the relatively described housing of described guard shield and moves to primary importance from the second place; When described saw blade is perpendicular to described surface of the work, and when contacting with surface of the work with described housing bottom described guard shield simultaneously, described butting section and surface of the work single-contact, described contact site and described surface of the work single-contact.
In disclosed portable circular saw, when saw blade is perpendicular to surface of the work, and when contacting with surface of the work with described housing bottom described guard shield simultaneously, described butting section and surface of the work and described contact site and described surface of the work all form single-contact.And only having two-point contact to be not enough to support whole portable circular saw, portable circular saw once leave the gripping of operator, then can be toppled on the surface of the workpiece at once.So, rebounding mechanism just without the need to overcoming the gravity of whole machine, thus easily can return back to primary importance to by guard shield, and namely saw blade can not expose the position of opening, improves security greatly.
Preferred implementation of the present invention is also following several:
Preferably, described butting section comprises first, second limit angularly arranged, and the intersection point on first, second limit described and surface of the work form single-contact.
Preferably, described butting section comprises arc-shaped edges, and described arc-shaped edges and surface of the work form single-contact.
Preferably, described butting section comprises hypotenuse, and described hypotenuse and surface of the work form single-contact.
Preferably, described contact site arc-shaped side, described arc-shaped side and surface of the work form single-contact.
Preferably, described contact site comprises salient point, and described salient point and surface of the work form single-contact.
Preferably, described housing comprises the power brick housing of collecting battery, and described contact site is on described power brick housing.
Preferably, described contact site is in described housing rear portion.
Preferably, described rebounding mechanism is torsion spring, and described one end connects this guard shield, and it is anterior that the other end connects described housing.
Preferably, described guard shield is pivotally connected to described housing front portion.
Preferably, one in described guard shield and housing front portion is provided with guide rail, and another in both is provided with mating part, and this mating part coordinates with described guide rail to move along described guide rail described guard shield is moved between the first position and the second position.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, further detailed description is done to the present invention.
Fig. 1 is the front view of portable circular saw in prior art.
The right view of the portable circular saw that Fig. 2 discloses for Fig. 1.
Fig. 3 is the front view of the portable circular saw in the embodiment of the present invention, and saw blade does not expose the position of opening.
The front view of the portable circular saw that Fig. 4 discloses for Fig. 3, guard shield is not arranged on housing.
The front view of the portable circular saw that Fig. 5 discloses for Fig. 3, saw blade exposes the position of opening.
The stereogram of the portable circular saw that Fig. 6 discloses for Fig. 3.
The front view of the portable circular saw that Fig. 7 discloses for Fig. 3, now contacts with surface of the work with housing bottom guard shield simultaneously.
The right view of the portable circular saw that Fig. 8 discloses for Fig. 3, contact site comprises arc-shaped edges.
The left body figure of the portable circular saw that Fig. 9 discloses for Fig. 3.
Figure 10 is the right view of portable circular saw, and contact site comprises two limits angularly arranged.
Figure 11 is the right view of portable circular saw, and contact site comprises hypotenuse.
In figure:
20. take formula cutting machine 22. housing 24. saw blade
The anterior 30. housing rear portions of 26. switch module 28. housings
Bottom 32. power line 34. guard shield 36. guard shields
38. sidewall 40. supporting surface 42. openings
44. cavity 46. pivot axis 48. rebounding mechanisms
50. torsion spring 51. butting section 52. arc-shaped edges
54. against point 56. contact site 58. arc-shaped side
60. contact point 62. first limit 64. Second Edges
66. hypotenuses
Detailed description of the invention
With reference to Fig. 3, embodiment of the present invention provides a kind of portable circular saw 20.Portable circular saw 20 comprises housing 22, the motor (not shown) be housed in housing 22, be positioned at housing 22 for the transmission component (not shown) transmitting power, the saw blade 24 be connected with transmission component, be positioned at the switch module 26 housing 22 controlling motor and whether work.In describing the invention, unless otherwise noted, direction term, as front, back, left, right, up and inferior, all relative to the normal direction using this portable circular saw 20 shown in Fig. 1, if the direction of advance defining portable circular saw is front, the direction contrary with the direction of advance of portable circular saw is rear etc.
This housing 22 comprises interconnective housing anterior 28 and housing rear portion 30.Housing 22 can be whole moulding, and can be made up of two and half shells; Can be moulding, but point two parts, a part is made up of two and half shells; Another part then non-half shell is formed; Or part injection part and part metals part.In the present embodiment, housing anterior 28 is not an entirety with housing rear portion, be then fixed together.Its middle shell is anterior for accommodating saw blade 24 top; Housing rear portion 30 is made up of two and half shells, for accommodating motor.And housing rear portion 30 is connected with power line 32 usually away from one end of housing front portion 28.Certainly, portable circular saw 20 also can adopt direct current energy to power, and namely on portable circular saw 20, installs power brick, by power brick to motor power supplying.
Housing rear portion 30 is simultaneously also as the handle use of operator, and operator holds housing rear portion 30 with mobile portable annular saw 20 in operation.This housing rear portion 30 can be provided with encapsulate pleasant to make operator grip, thus reduce tired.
In addition, motor can be carbon brush motor, brushless motor etc., or corresponds to the energy source of portable circular saw 20, and motor can be alternating current motor or d.c. motor.
With reference to Fig. 3 and Fig. 4, portable circular saw 20 comprises guard shield 34, and guard shield 34 is connected on housing front portion 28.Guard shield 34 to comprise bottom guard shield 36 and be connected to bottom guard shield 36 sidewall 38.Wherein, 36 comprise for the supporting surface 40 against surface of the work and therefrom expose opening 42 (can see Fig. 6) for saw blade bottom guard shield.Bottom sidewall 38 and guard shield, 36 form cavitys 44, and cavity 44 is used for accommodating the bottom of saw blade 24.
Guard shield 34 is connected with housing anterior 28 movably.In the present embodiment, guard shield 36 can be rotatably connected on housing front portion 28 around pivot axis 46, thus guard shield 34 is moved between the first position and the second position relative to housing front portion 28.When guard shield 34 is positioned at primary importance, saw blade 24 does not expose from opening 42 (with reference to Fig. 3); When guard shield 34 is positioned at the second place, what saw blade 24 was at least part of exposes from opening 42 (with reference to Fig. 5), and now, electric circular saw 20 can be used to processing work.
Certainly, also can be connected with mating part by guide rail between guard shield 34 and housing front portion 28.Guide rail is located in both guard shield 34 and housing front portion 28, and mating part is located on another in both guard shield 34 and housing front portion 28.Mating part coordinates with guide rail and can move along guide rail, thus makes guard shield 34 primary importance that from saw blade be not exposed to opening moveable relative to housing anterior 28 at least part of second place being exposed to opening of saw blade.Here, guide rail can be line slideway also can be arc-shaped guide rail.As well known to the skilled person, the syndeton between guard shield 34 and housing front portion 28 can also have a lot of mode, moves between the first position and the second position relative to housing front portion as realized guard shield by linkage, does not just repeat one by one here.
Refer again to Fig. 4, portable circular saw 20 comprises rebounding mechanism 48, and this rebounding mechanism 48 is provided for guard shield 34 and relatively moves to primary importance from the second place in housing front portion 28.The i.e. primary importance do not exposed from opening for making guard shield 34 return back to saw blade 24 of rebounding mechanism 48.In the present embodiment, rebounding mechanism 48 comprises torsion spring 50, and this torsion spring 50 one end is connected on housing front portion 28, and the other end is connected on guard shield 34.Certainly, known by those skilled in the art, rebounding mechanism 48 can arrange corresponding rebounding mechanism according to bindiny mechanism concrete between guard shield 34 and housing front portion 28.
For the ease of in different situations, guard shield 34 can return back to primary importance under the effect of rebounding mechanism 48, i.e. saw blade 24 position of not exposing from opening 42.When saw blade 24 is perpendicular to surface of the work, and bottom guard shield 36 when contact with surface of the work with housing 22 simultaneously, bottom guard shield 36 and surface of the work be set to single-contact; Equally, housing 22 and surface of the work are also single-contact.So, when saw blade 24 is perpendicular to surface of the work, and bottom guard shield 36 when contacting with surface of the work with housing 22 simultaneously, whole portable circular saw only has contact with surface of the work at 2, be not enough to support whole portable circular saw 20, portable circular saw 20 is once leave the gripping of operator, then can topple on the surface of the workpiece at once, so, rebounding mechanism 48 is just without the need to overcoming the gravity of whole machine, thus easily guard shield 34 can be returned back to primary importance, namely saw blade 24 can not expose the position of opening 42, improves security greatly.
In the present embodiment, easily reset for the ease of rebounding mechanism 48, with reference to Fig. 6, bottom guard shield, 36 comprise the butting section 51 contacted with surface of the work, and this butting section 51 comprises arc-shaped edges 52.With reference to Fig. 7 and Fig. 8, when saw blade 24 is perpendicular to surface of the work, and bottom guard shield 36 when contact with surface of the work with housing 22, arc-shaped edges 52 and surface of the work single-contact, formed against point 54 simultaneously.With reference to Fig. 6, housing 22 comprises the contact site 56 contacted with surface of the work, and contact site 56 comprises arc-shaped side 58.With reference to Fig. 7 and Fig. 9, when saw blade 24 is perpendicular to surface of the work, and bottom guard shield 36 when contact with surface of the work with housing 22, arc-shaped side 58 contacts single-contact with surface of the work, formation contact point 60 simultaneously.So, form straight line against point 54 and contact point 60, and 2 straight lines formed are not enough to support whole portable circular saw, portable circular saw, once leave the gripping of operator, can refer to Fig. 6, then can topple on the surface of the workpiece at once.So, rebounding mechanism just without the need to overcoming the gravity of whole machine, thus easily to position guard shield being returned back to saw blade and can not expose opening, can improve security greatly.
In the present embodiment, bottom guard shield, 36 when contact with surface of the work with housing 22 simultaneously, bottom guard shield 36 with surface of the work against point 54 and supporting surface 40 coplanar.
Certainly, bottom guard shield, 36 butting sections contacted with surface of the work also can be not only and comprise arc-shaped edges.With reference to Figure 10, butting section comprises first, second limit 62 and 64 angularly arranged, saw blade 24 perpendicular to surface of the work, and bottom guard shield 36 when contacting with surface of the work with housing 22 simultaneously, first, second limit 62 with 64 intersection point contact single-contact with surface of the work, formed against point 54.With reference to Figure 11, butting section also can comprise hypotenuse 66, and when saw blade 24 is perpendicular to surface of the work, and bottom guard shield 36 when contacting with surface of the work with housing 22, hypotenuse 66 contacts single-contact with surface of the work, is formed against point 54 simultaneously.From the above, butting section concrete shape can be multiple, as long as but be single-contact when contacting with surface of the work.
Equally, contact site 58 contacts with surface of the work also can be not only arc-shaped side, and contact site 58 also can be provided with hypotenuse or salient point and surface of the work single-contact, forms contact point, can realize creating conception of the present invention equally.
In the present embodiment, be connected with power line 32 at housing rear portion 30, for AC energy is powered.And contact site 58 is arranged on housing rear portion 30.Certainly, portable circular saw also can adopt direct current energy to power, and namely on portable circular saw, installs power brick.Housing 22 comprises the power brick housing of collecting battery, and the contact site contacted with surface of the work also can be arranged on power brick housing, can realize creating conception of the present invention equally.
The present invention is not limited to aforementioned embodiments, those skilled in the art also may make under the enlightenment of the technology of the present invention marrow other change, as long as but its realize function and the present invention same or similar, all should be covered by scope.
Claims (10)
1. a portable circular saw, comprising:
Saw blade;
Motor, for driving described saw blade;
Housing, described housing comprises interconnective housing front portion and housing rear portion; Housing front portion is used for accommodating part saw blade, and housing rear portion is used for accommodating described motor; Described housing also comprises for contacting surface of the work contact site;
Be installed on the guard shield of housing front portion, described guard shield comprises bottom guard shield, comprise the opening therefrom exposed for described saw blade bottom described guard shield, described guard shield not to be exposed between the primary importance of described opening and at least part of second place being exposed to described opening of described saw blade at described saw blade relative to described housing and to move; Also comprise for contacting surface of the work butting section bottom described guard shield;
Rebounding mechanism, described rebounding mechanism is provided for the relatively described housing of described guard shield and moves to primary importance from the second place;
It is characterized in that: when described saw blade is perpendicular to described surface of the work, and when contacting with surface of the work with described housing bottom described guard shield, described butting section and surface of the work single-contact, described contact site and described surface of the work single-contact. simultaneously
2. portable circular saw according to claim 1, is characterized in that: described butting section comprises first, second limit angularly arranged, and the intersection point on first, second limit described and surface of the work form single-contact.
3. portable circular saw according to claim 1, is characterized in that: described butting section comprises arc-shaped edges, and described arc-shaped edges and surface of the work form single-contact.
4. portable circular saw according to claim 1, is characterized in that: described butting section comprises hypotenuse, and described hypotenuse and surface of the work form single-contact.
5. portable circular saw according to claim 1, is characterized in that: described contact site arc-shaped side, and described arc-shaped side and surface of the work form single-contact.
6. portable circular saw according to claim 1, is characterized in that: described contact site comprises salient point, and described salient point and surface of the work form single-contact.
7. portable circular saw according to claim 1, is characterized in that: described housing comprises the power brick housing of collecting battery, and described contact site is on described power brick housing.
8. portable circular saw according to claim 1, is characterized in that: described contact site is in described housing rear portion.
9. portable circular saw according to claim 1, is characterized in that: described rebounding mechanism is torsion spring, and described one end connects this guard shield, and it is anterior that the other end connects described housing.
10. portable circular saw according to claim 1, is characterized in that: it is anterior that described guard shield is pivotally connected to described housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410455180.2A CN105458398A (en) | 2014-09-09 | 2014-09-09 | Portable circular saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410455180.2A CN105458398A (en) | 2014-09-09 | 2014-09-09 | Portable circular saw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105458398A true CN105458398A (en) | 2016-04-06 |
Family
ID=55596799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410455180.2A Pending CN105458398A (en) | 2014-09-09 | 2014-09-09 | Portable circular saw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105458398A (en) |
Cited By (3)
| 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 |
| CN105921812A (en) * | 2016-06-20 | 2016-09-07 | 宁波市天铭工具有限公司 | Handheld electric circular saw |
| CN110681916A (en) * | 2018-07-06 | 2020-01-14 | 苏州宝时得电动工具有限公司 | Portable cutting machine |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002370211A (en) * | 2001-06-13 | 2002-12-24 | Ryobi Ltd | Circular saw |
| JP2003071804A (en) * | 2001-08-31 | 2003-03-12 | Sumitomo Forestry Co Ltd | Circular saw and circular saw blade used therefor |
| CN1572435A (en) * | 2003-05-20 | 2005-02-02 | 安德烈亚斯·斯蒂尔两合公司 | Manually operated tool |
| CN201231349Y (en) * | 2008-06-27 | 2009-05-06 | 杭州巨星科技股份有限公司 | Safe electric saw |
| CN201493556U (en) * | 2009-09-07 | 2010-06-02 | 宁波捷美进出口有限公司 | Hand-held circular saw guard shield safe locking mechanism |
| CN101863047A (en) * | 2009-04-20 | 2010-10-20 | 苏州宝时得电动工具有限公司 | Portable cutting machine |
| CN102848015A (en) * | 2011-06-27 | 2013-01-02 | 苏州宝时得电动工具有限公司 | Portable cutting machine |
| CN103537754A (en) * | 2012-07-13 | 2014-01-29 | 苏州宝时得电动工具有限公司 | Portable cutting machine |
-
2014
- 2014-09-09 CN CN201410455180.2A patent/CN105458398A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002370211A (en) * | 2001-06-13 | 2002-12-24 | Ryobi Ltd | Circular saw |
| JP2003071804A (en) * | 2001-08-31 | 2003-03-12 | Sumitomo Forestry Co Ltd | Circular saw and circular saw blade used therefor |
| CN1572435A (en) * | 2003-05-20 | 2005-02-02 | 安德烈亚斯·斯蒂尔两合公司 | Manually operated tool |
| CN201231349Y (en) * | 2008-06-27 | 2009-05-06 | 杭州巨星科技股份有限公司 | Safe electric saw |
| CN101863047A (en) * | 2009-04-20 | 2010-10-20 | 苏州宝时得电动工具有限公司 | Portable cutting machine |
| CN201493556U (en) * | 2009-09-07 | 2010-06-02 | 宁波捷美进出口有限公司 | Hand-held circular saw guard shield safe locking mechanism |
| CN102848015A (en) * | 2011-06-27 | 2013-01-02 | 苏州宝时得电动工具有限公司 | Portable cutting machine |
| CN103537754A (en) * | 2012-07-13 | 2014-01-29 | 苏州宝时得电动工具有限公司 | Portable cutting machine |
Cited By (3)
| 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 |
| CN105921812A (en) * | 2016-06-20 | 2016-09-07 | 宁波市天铭工具有限公司 | Handheld electric circular saw |
| CN110681916A (en) * | 2018-07-06 | 2020-01-14 | 苏州宝时得电动工具有限公司 | Portable cutting machine |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160406 |
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| RJ01 | Rejection of invention patent application after publication |