CN102728887B - Bench saw - Google Patents
Bench saw Download PDFInfo
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- CN102728887B CN102728887B CN201110081649.7A CN201110081649A CN102728887B CN 102728887 B CN102728887 B CN 102728887B CN 201110081649 A CN201110081649 A CN 201110081649A CN 102728887 B CN102728887 B CN 102728887B
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- guard shield
- contact surface
- workbench
- workpiece
- saw
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Abstract
The invention relates to a bench saw comprising a base, a work bench arranged on the base, a cutting assembly connected with ether the base or the work bench, a cleaver connected with the cutting assembly, and a shield arranged on the cleaver in a pivoted manner and rotates with the cleaver, wherein the cutting assembly comprises a motor and a saw web with side planes and driven by the motor to rotate, the saw web can extend from a saw web groove arranged in the surface of the work bench, the shield has side planes parallel to the side planes of the saw web and a first contact surface in a vertical manner with the side planes of the shield and capable of contacting a workpiece, and a second contact surface is arranged between the first contact surface and the side planes of the shield. The second contact surface is arranged between the first contact surface of the shield and the side planes of the shield on the bench saw of the invention, when the extension directions of the workpiece and the saw web groove incline, then the workpiece contacts the second contact surface and pushes the shield, so the shield is easily lifted.
Description
Technical field
The present invention relates to a kind of bench saw, especially a kind of bench saw with blade shroud.
Background technology
Bench saw generally comprises pedestal, be arranged on the workbench on pedestal, with workbench and one of them cutting assembly be connected of pedestal, the chopper be connected with cutting assembly, to be arranged on chopper and can the guard shield of phase broadsword v.broadsword pivotable, described cutting assembly comprises motor and is driven the saw blade rotated by motor, stretches out the saw blade groove that described saw blade can be offered on the surface from workbench, and described guard shield covers described saw blade at least partly and touches sawtooth and injured to prevent operator.When using bench saw, workpiece is placed in workbench on the surface and push workpiece to saw blade by operator, and because saw blade is by guard covers, when saw blade pushed to by workpiece, first workpiece contacts with guard shield and lifted by guard shield, and after guard shield lifts, workpiece will contact saw blade and be cut.
Use and find, when the bearing of trend of workpiece and the bearing of trend of saw blade groove tilt, workpiece is difficult to guard shield to lift, and saw blade also has the risk switching to guard shield simultaneously.
Summary of the invention
For the deficiencies in the prior art, the bench saw that when the object of the present invention is to provide the bearing of trend of a kind of bearing of trend of workpiece and saw blade groove to tilt, guard shield easily lifts.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of bench saw, comprise pedestal, be arranged on the workbench on pedestal, with pedestal and one of them cutting assembly be connected of workbench, the chopper be connected with described cutting assembly, to be arranged on described chopper and can the guard shield of phase broadsword v.broadsword pivotable, described cutting assembly comprises motor and is rotated by motor driving and have the saw blade of side plane, stretch out the saw blade groove that described saw blade can be offered on the surface from workbench, described guard shield has the guard shield side being parallel to described saw blade side plane, the first contact surface of workpiece also can be contacted with described guard shield lateral vertical, it is characterized in that: between described first contact surface and described guard shield side, be provided with the second contact surface.
Preferably, described second contact surface is plane.
Preferred, the angle between described second contact surface and described first contact surface is 135 degree.
Preferably, described first contact surface comprises the portion of being lifted away from, and workpiece contacts with the described portion of being lifted away from and promotes described guard shield and moves along the direction away from described workbench surface, is lifted away between portion and described guard shield side described in described second contact surface is arranged on.
Preferred, the described portion of being lifted away from comprises the first abutment plane and second abutment plane of angled setting, relatively described first abutment plane of described second abutment plane is away from described workbench, and formed by described first abutment plane and described workbench surface, acute angle is less than acute angle formed by described second abutment plane and described workbench surface.
Preferably, the width of described second contact surface reduces gradually along the direction away from described workbench.
Preferably, described bench saw arranges elastic component, described elastic component towards away from the direction stating workbench surface active force is applied to described guard shield, this active force is less than the gravity of described guard shield.
Preferred, described guard shield is arranged on chopper by pivotal axis, and described elastic component is arranged on described pivotal axis.
Preferred, described elastic component is torsion spring, and described torsion spring set is located on described pivotal axis.
Preferably, described guard shield is arranged on chopper by pivotal axis, described pivotal axis is provided with bearing to support described guard shield and described pivotal axis.
For achieving the above object, another technical scheme that the present invention takes is:
A kind of bench saw, comprise pedestal, be arranged on the workbench on pedestal, with pedestal and one of them cutting assembly be connected of workbench, the chopper be connected with described cutting assembly, to be arranged on described chopper and can the guard shield of phase broadsword v.broadsword pivotable, described cutting assembly comprises motor and is rotated by motor driving and have the saw blade of side plane, stretch out the saw blade groove that described saw blade can be offered on the surface from workbench, described guard shield has the guard shield side being parallel to described saw blade side plane, the first contact surface of workpiece can be contacted with described guard shield lateral vertical, described guard shield also has the second contact surface contacting workpiece when the bearing of trend of workpiece tilts with the bearing of trend of saw blade groove.
Preferably, described second contact surface is plane.
Preferred, the angle between described second contact surface and described first contact surface is 135 degree.
Preferably, described first contact surface comprises the portion of being lifted away from, and workpiece contacts with the described portion of being lifted away from and promotes described guard shield and moves along the direction away from described workbench surface, is lifted away between portion and described guard shield side described in described second contact surface is arranged on.
Preferred, the described portion of being lifted away from comprises the first abutment plane and second abutment plane of angled setting, relatively described first abutment plane of described second abutment plane is away from described workbench, and formed by described first abutment plane and described workbench surface, acute angle is less than acute angle formed by described second abutment plane and described workbench surface.
Preferably, the width of described second contact surface reduces gradually along the direction away from described workbench.
Preferably, the second contact surface is provided with between two guard shield sides of described guard shield and described first contact surface.
Bench saw of the present invention is owing to being provided with the second contact surface between the first contact surface of guard shield and guard shield side, and when the bearing of trend of workpiece and the bearing of trend of saw blade groove tilt, workpiece contacts with the second contact surface and pushing protective cover, thus guard shield is easily lifted.
Accompanying drawing explanation
Be described in further detail below in conjunction with accompanying drawing and the preferred embodiments of the present invention.
Fig. 1 is the front view of the bench saw that the embodiment of the present invention provides;
Fig. 2 is the stereogram of the guard shield of bench saw shown in Fig. 1;
Fig. 3 is the guard shield first of bench saw shown in Fig. 1 contact surface force analysis figure;
Fig. 4 be the bench saw shown in Fig. 1 cut sth. askew cut time, guard shield stressed schematic diagram when guard shield first contact surface is connected by seamed edge with between guard shield side and is connected by the second contact surface;
Fig. 5 is the partial sectional view of the guard shield installation place of bench saw shown in Fig. 1;
Fig. 6 is another partial sectional view according to guard shield of platform shown in Fig. 1, the installation of the elastic component illustrated.
Fig. 7 is the guard shield first of bench saw shown in Fig. 1 contact surface, the second contact surface, guard shield side arrange schematic diagram.
Wherein, related elements reference numeral is as follows:
100. bench saw 10. pedestal 20. workbench
21. workbench surface 22. saw blade grooves
31. saw blade 40. chopper 41. pivotal axis
42. axle sleeve 43. bearing 44. torsion springs
50. guard shield 51. first abutment plane 52. second abutment plane
53. are lifted away from guard shield side, portion 54. 55. second contact surface
56. hollows 57. protective plate 58. screws
59. base 200. workpiece
Detailed description of the invention
See Fig. 1 and Fig. 2, the bench saw 100 of the present embodiment comprises pedestal 10, be arranged on the workbench 20 on pedestal 10, the cutting assembly be connected with one of both workbench 20 with pedestal 10, the chopper 40 be connected with cutting assembly, to be arranged on chopper 40 and can phase broadsword v.broadsword 40 around the guard shield 50 of pivotal axis 41 pivotable.It is (not shown that cutting assembly comprises motor, motor is positioned at the space that pedestal 10 encloses with workbench 20) and motor drive the saw blade 31 rotated, the saw blade groove 22 that saw blade 31 is offered from workbench surface 21 stretches out with cut workpiece, and saw blade 31 has side plane.Guard shield 50 covers saw blade 31 at least partly and hurts operator to prevent the sawtooth of saw blade 31, guard shield 50 has the guard shield side 54 protecting saw blade 31 side plane, guard shield 50 has two relative guard shield sides 54, guard shield side 54 is parallel with saw blade 31 side plane, one of them guard shield side is outside equipped with protective plate 57, therefore, this guard shield side is not shown in the drawings.
According to the usual occupation mode of operator to this type of bench saw, left side in definition Fig. 1 is the rear portion of bench saw 100, right side is the front portion of bench saw 10, during cutting, workpiece 200 is placed on workbench surface 21 by operator, workpiece 200 is pushed to be relatively positioned at rear portion saw blade 31 from the front portion on workbench surface 21, because guard shield 50 part covers saw blade 31, make workpiece 200 contact saw blade 31 and be cut, workpiece 200 pushing protective cover 50 must be made and make guard shield 50 away from workbench surface 21, lift by guard shield 50, thus, guard shield 50 has the first contact surface of contact workpiece 200, first contact surface is vertical with guard shield side 54, in the present embodiment, first contact surface comprises the portion of being lifted away from 53 and guard shield base 59, workpiece 200 is anterior toward in the process of rear motion from bench saw 100, workpiece 200 first be lifted away from portion 53 and contact, pushing protective cover 50 moves along the direction away from workbench surface 21 by workpiece 200, lift by guard shield 50, workpiece 200 continues motion, when whole workpiece 200 all moved the portion 53 of being lifted away from, workpiece 200 will contact with part base 59, the scope that the workpiece 200 of differing heights contacts with base 59 is different.Promote to be lifted away from portion 53 to make guard shield to be lifted rear continuation move smoothly for making workpiece 200, generally cambered surface is excessive with being lifted away from portion 53 on base 59, guard shield 50 and the contact point on workbench surface 21 are lifted away from the point of contact on curved portions that portion 53 is connected with base 59 and workbench surface 21 just, therefore, being lifted away from portion 53 is that the first contact surface upper shield 50 extends the part of free end with the contact point O on workbench surface 21 to guard shield 50, and base 53 is the parts of contact point O to pivotal axis 41 on guard shield 50 and workbench surface 21.
Refer to Fig. 1 and Fig. 3, in the present embodiment, the portion that is lifted away from 53 of guard shield 50 comprises angled α
3the first abutment plane 51 arranged and relative first abutment plane 51 of the second abutment plane 52, second abutment plane 52 away between workbench surface 21, first abutment plane 51 and workbench surface 21 in the first sharp angle α
1arrange, in the second sharp angle α between the second abutment plane 52 and workbench surface 21
2arrange, the first sharp angle α
1be less than the second sharp angle α
2, and the angle α between the first abutment plane 51 and the second abutment plane 52
3be greater than 90+ α
1degree, is less than 180 degree.Be lifted away from portion 53 vertical with guard shield side 54, the first abutment plane 51 is all vertical with guard shield side 54 with the second abutment plane 52.
See Fig. 3, when workpiece contacts with guard shield 50 in the first abutment plane 51, workpiece has thrust F to guard shield
1, thrust F
1perpendicular to the first abutment plane 51 and the Y-Y direction making guard shield lift, namely perpendicular to the component F on the direction on workbench surface 21
1'=F
1* cos α
1, due to α
1be worth less, therefore cos α
1value is comparatively large, thrust F
1the component F that guard shield is lifted
1' comparatively large, so workpiece is when the first abutment plane 51 of guard shield 50 contacts with guard shield 50, workpiece can make guard shield 50 lift smoothly.
When workpiece contacts with guard shield 50 in the second abutment plane 52, use and F
1the thrust F of equal size
2during pushing protective cover 50, thrust F
2perpendicular to the second abutment plane 52 and the Y-Y direction making guard shield 50 lift, namely perpendicular to the component F on the direction on workbench surface 21
2'=F
2* cos α
2, due to α
2> α
1, therefore, cos α
2< cos α
1, thrust F
2make the component F that guard shield 50 lifts
2' be less than thrust F
1the component F that guard shield is lifted
1', but, thrust F
2component F
2' to the arm of force L at pivotal axis 41 place
2be greater than thrust F
1component F
1' to the arm of force L at pivotal axis 41 place
1, so, although F
2' < F
1', but due to L
2> L
1, when workpiece contacts with the second abutment plane 52 of guard shield 50, thrust F
2to the moment F of guard shield 50
2' * L
2equally enough make guard shield 50 lift, therefore, guard shield 50 when workpiece contacts with the second abutment plane 52 of guard shield 50, can be easy to equally to lift.To sum up, any point that workpiece 200 is lifted away from portion 53 with guard shield 50 contacts, all can easier pushing protective cover 50, and guard shield 50 is upwards lifted.
It should be noted that, during absorption surface guard shield, workpiece can cause producing frictional force between workpiece and guard shield to the thrust of guard shield, the size of frictional force equals the product of friction coefficient and normal pressure between the two, therefore, frictional force relative force is smaller, for simplicity, above-mentioned analysis eliminates the analysis to frictional force, but this omission can not cause result different.
The cutting-in of industry to bench saw there are certain requirements, namely require that bench saw is at least the workpiece that can cut certain altitude, workpiece is contacted prior to saw blade 31 because guard shield is lifted away from portion 53, therefore the height on relative workbench surface 21, the portion that is lifted away from 53 of guard shield must higher than the height on the relative workbench surface 21 of workpiece, otherwise, the portion that is lifted away from 53 of guard shield can stop workpiece to saw blade 31 near thus cannot cut.See Fig. 3, if the portion that is lifted away from 53 of guard shield 50 and workbench surface 21 are in unique the first less sharp angle α
1arrange, be namely lifted away from portion 53 and extend along the first abutment plane 51 completely, reach is highly the cutting-in requirement of H, and guard shield 50 reaches S from pivotal axis 41 to the development length of the free end being lifted away from portion 53 to I haven't seen you for ages
2and adopt the scheme of the present embodiment, be lifted away from portion 53 and comprise the first abutment plane 51 of angled setting and relative first abutment plane 51 of the second abutment plane 52, second abutment plane 52 away from described workbench 20, first abutment plane 51 and the first sharp angle α folded by workbench surface 21
1be less than the second abutment plane 52 and the second sharp angle α folded by workbench surface 21
2, reach the cutting-in requirement that same height is H, guard shield 50 is from pivotal axis 41 to being lifted away from the development length of free end in portion 53 slightly larger than S
1, calculate namely known a little, S
1< S
2.Therefore, the guard shield 50 of the present embodiment effectively can shorten the length of guard shield 50.
To sum up, the bench saw 100 of the present embodiment is lifted away from which position pushing protective cover 50 in portion 53 at guard shield 50 regardless of workpiece, guard shield 50 all can be made to lift smoothly, simultaneously, effectively can shorten the length of guard shield 50, thus prevent guard shield 50 long and stretch out the cutting inconvenience caused outside workbench surface 21, and make bench saw 100 outward appearance regular, convenient transportation.
Above-mentioned force analysis carries out with the side plane of saw blade 31 21 vertically disposed situations surperficial relative to workbench.Bench saw 100 also has another occupation mode usually; namely as shown in Figure 4; relative for the side plane of saw blade 31 workbench surface 21 is obliquely installed with cut workpiece; what deserves to be explained is; when the relative workbench surface of saw blade 31 21 inclination certain angle; guard shield 50 is with saw blade 31 workbench surface 21 corresponding inclinations relatively, and bench saw 100 is in the state of inclined cut, and above-mentioned analysis is applicable equally.
The guard shield of applicant to the multiple bench saws occurred on the market carries out modified test, finds the angle α between the first abutment plane 51 of guard shield 50 and workbench surface 21
1angular range between 15 degree to 32 degree, more preferably 25 to 30 degree between, the angle α between the second abutment plane 52 and workbench surface
2scope between 40 degree to 60 degree, more preferably between 40 to 45 degree, workpiece can be made to be lifted by guard shield 50 smoothly, meanwhile, the length of guard shield 50 also in a controlled scope, can not exceed the width on common bench saw worktable surface.
Existing bench saw is lifted away from portion and guard shield side and is intersected by seamed edge, when the bearing of trend of workpiece and the bearing of trend of saw blade groove tilt, workpiece contacts with this seamed edge and pushing protective cover, experiment finds, when workpiece contacts with this seamed edge, workpiece is difficult to pushing protective cover and lifts, for addressing this problem, see Fig. 2 and Fig. 7, between the first contact surface of bench saw 100 guard shield 50 of the present embodiment and guard shield side 54, be provided with the second contact surface 55.Due to the first contact surface the portion that is lifted away from 53 first with absorption surface and workpiece promote under make guard shield 50 is lifted, therefore, preferably, the second contact surface 55 is arranged between the portion of being lifted away from 53 and guard shield side 54.Preferred, the second contact surface 55 is plane.When the bearing of trend of workpiece and the bearing of trend of saw blade groove tilt, the second contact surface 55 and absorption surface, will make guard shield 50 be easier to lift.
As shown in Figure 4, when the side plane of saw blade 31 workbench surface relative to guard shield 50 21 inclination certain angles time, bench saw 100 is in the state of inclined cut, if the bearing of trend of workpiece 200 tilts with the bearing of trend of saw blade groove 22 again, namely arrange in acute angle between the two, now, the state residing for bench saw 100 is the duty of two inclination.Experiment finds, when bench saw 100 is in two heeling condition, especially the relative workbench surface 21 of the side plane of saw blade 31 tilts 45 degree, the bearing of trend of workpiece 200 and the bearing of trend of saw blade groove 22 tilt 45 degree this two tilt 45 degree of states time, workpiece is the most difficult to be lifted guard shield 50, the most easily blocked by guard shield 50, and saw blade 31 easily switches to guard shield 50, and make situation with the most use when this situation is two inclination.For addressing this problem, see also Fig. 7, preferably, the second contact surface 55 is plane and the angle β in the portion that is lifted away from 53 of the second contact surface 55 and the first contact surface
1be 135 degree, because guard shield side 54 is vertical with the first contact surface, the angle β of the second contact surface 55 and guard shield side 54
2be similarly 135 degree, like this, during two inclination 45 degree, workpiece can contact completely with the second contact surface 55, is easily lifted by guard shield.
See Fig. 2 and Fig. 4 and Fig. 7, when bench saw is in the duty of two inclination, if the guard shield side 54 of guard shield 50 be lifted away from portion 53 and directly extend crossing, the seamed edge L that then guard shield side 54 is crossing with being lifted away from portion 53 contacts with workpiece 200, when guard shield side 54 be lifted away from portion 53 be connected by the second contact surface 55 time, be equivalent to have cut away guard shield side 54 crossing with being lifted away from portion 53 comprise the corner angle with the seamed edge L of absorption surface, second contact surface 55 directly contacts with workpiece 200, guard shield 50 is under gravity near workbench surface 21, also be just equivalent to reduce the angle between guard shield 50 and workbench surface 21, second contact surface 55 and the angle on workbench surface 21 more surperficial than the relative workbench of guard shield 50 21 vertical time the first abutment plane 51 and the second abutment plane 52 and the first sharp angle α folded by workbench surface 21
1with the second sharp angle α
2less, thus, the component of thrust in the Z-Z direction making guard shield 50 lift of workpiece 200 pairs of guard shields 50 increases, and guard shield 50 is more easily lifted.Z-Z direction is the direction that saw blade 31 tilts relative to workbench 20, and guard shield 50 will be lifted along this side up.
Guard shield side 54 is connected by the second contact surface 55 with being lifted away between portion 53, not only can reduce the angle between guard shield 50 and workbench surface 21, can also change the direction of guard shield 50 by workpiece 200 thrust.Because guard shield 50 is subject to the thrust of workpiece 200 simultaneously perpendicular to guard shield 50 and workpiece 200, see Fig. 4, when guard shield side 54 be lifted away from directly to extend through between portion 53 seamed edge crossing time, workpiece is F3 to the thrust of guard shield 50, when guard shield side 54 be lifted away from be connected by the second contact surface 55 between portion 53 time, workpiece is F to the thrust of guard shield 50
4, thrust F
4direction closer to the saw blade 31 relatively direction that tilts of workbench 20, i.e. Z-Z direction, at F
3with F
4when equal size, obviously, thrust F
4at the component F in the Z-Z direction making guard shield 50 lift
41be greater than thrust F
3at the component F in the Z-Z direction making guard shield 50 lift
31, because Z-Z direction is the direction that guard shield is lifted, larger at the component in Z-Z direction, it is easier that guard shield 50 is lifted.Therefore, guard shield side 54 be lifted away from be connected by the second contact surface 55 between portion 53 time, workpiece 200 contact with the second contact surface 55 and pushing protective cover 50 can easier guard shield 50 be lifted.
In addition, guard shield side 54 is connected by the second contact surface 55 with being lifted away between portion 53, cuts sth. askew when cutting, and also can increase the contact area of workpiece 200 and guard shield 50, make guard shield 50 stress point distribute more evenly, facilitate on guard shield 50 and lift.Further, also can increase roller or scrolling bands on the second contact surface 55, the sliding friction between workpiece 200 and guard shield 50 be changed into the less rolling friction of frictional force, frictional force reduces, and can further make guard shield 50 more easily lift.
Experiment finds, during bench saw 100 pairs of inclined cut, thin workpiece is more easily stuck and is difficult to guard shield 50 to lift, namely workpiece at guard shield 50 relatively on the position on workbench surface 21 during pushing protective cover 50, lift on guard shield 50 is more difficult, therefore, composition graphs 2, preferably, second contact surface 55 is gradual changes, namely the width of the second contact surface 55 reduces gradually along the direction away from station 20, as shown in Figure 2, second contact surface is less than relatively near the width b1 of workbench 20 away from the width b2 of workbench 20 relatively, on the contrary, the width of the second contact surface 55 increases gradually along the direction near workbench, thus, the closer to close workbench 20, the stress surface of guard shield 50 is larger, contribute to lifting of guard shield 50.
Be lifted away from portion 53 in the present embodiment and comprise the first abutment plane 51 and the second abutment plane 52 angularly arranged, thus, second contact surface 55 also comprises two parts, first abutment plane 51 is connected with the Part I transition of guard shield side 54 by the second contact surface 55, second abutment plane 52 is connected with the Part II transition of guard shield side 54 by the second contact surface 55, the mean breadth of the Part II of the second contact surface 55 is less than the mean breadth of the Part I of the second contact surface 55, and due to the second abutment plane 52 and the second sharp angle α folded by workbench surface 21
2be greater than the first abutment plane 51 and the first sharp angle α folded by workbench surface 21
1accordingly, the Part II of the second contact surface 55 and the angle on workbench surface 21 are greater than the Part I of the second contact surface 55 and the angle on workbench surface 21, like this, with be lifted away from portion 53 and comprise the first abutment plane 51 of angled setting and the second abutment plane 52 in like manner, workpiece to contact with guard shield 50 at any point of the second contact surface 55 and all can lift by pushing protective cover 50 easily, and can reduce the length of guard shield.
See Fig. 2, preferably, guard shield side 54 is connected with cambered surface transition between the first contact surface with the second contact surface 55 and/or the second contact surface 55, namely guard shield side 54 and/or the second contact surface 55 and the second contact surface 55 are contacted by hollows 56 with between the first contact surface, be connected in like manner by the second contact surface 55 with guard shield side 54 with being lifted away between portion 53, hollows 56 can make guard shield 56 lift more easily with absorption surface opposite edge and absorption surface.
The friction that the present embodiment is taken measures between reduction guard shield 50 and chopper 40 is lifted to facilitate guard shield 50, and see Fig. 6, guard shield 50 is arranged on chopper 40 by pivotal axis 41, and the pivotal axis 41 of the present embodiment is bolt.Composition graphs 1, when workpiece 200 push guard shield 50 to and to guard shield 50 applied thrust time, this thrust will be delivered between guard shield 50 and pivotal axis 41, the pressure increase of guard shield 50 pairs of pivotal axis 41, meanwhile, the frictional force between guard shield 50 and pivotal axis 41 increases, obstruction guard shield 50 lifts by this, and, in the course of time, the wearing and tearing of guard shield 50 and chopper 40 junction also can be accelerated.For addressing this problem, the present embodiment is at the outer sheathed axle sleeve 42 of pivotal axis 41, and the outer sheathed pair of bearings 43 of axle sleeve 42, bearing 43 supports pivotal axis 41 and guard shield 50 simultaneously.Be connected by bearing 43 between guard shield 50 with pivotal axis 41, significantly can reduce coefficient of friction between the two, the corresponding reduction of frictional force, this will make guard shield 50 lift easily, reduce the wearing and tearing of guard shield 50 simultaneously.
See Fig. 1, Fig. 5 and Fig. 6; the platform of the present embodiment also comprises elastic component according to 100; this elastic component applies active force towards the direction away from workbench surface 21 to guard shield 50; this active force is less than the gravity of guard shield 50; when bench saw 100 does not work; guard shield 50 under gravity can part lid saw blade to play the effect of protection, when bench saw 100 works, elastic component is to the directed force F of guard shield 50
5the part gravity of guard shield 50 can be offset thus facilitate guard shield 50 to lift.In the present embodiment, guard shield 50 is arranged on chopper 40 by pivotal axis 41, elastic component is arranged on pivotal axis 41, concrete, the elastic component of the present embodiment is torsion spring 44, torsion spring 44 is set on pivotal axis 41, torsion spring 44 comprise two torsion spring head 441, two torsion spring heads 441 be connected to respectively guard shield 50 on the base 59 of workbench 20 and to guard shield 50 apply away from workbench surface 21 directions directed force F
5, this directed force F
5can offset the part gravity of guard shield 50 and contribute to lifting of guard shield 50, elastic component is so arranged, and structure is simply easy to assembly.Preferably, directed force F
5direction contrary with the direction of gravity.The present embodiment can also have various deformation, as elastic component can be arranged on other position of bench saw 100, as long as this elastic component can apply towards the active force away from the direction on workbench surface 21 guard shield 50, such as, elastic component can be arranged on wall cutter 40 or on workbench 20.The elastic component of the present embodiment is torsion spring 44, the elastic component of other form as leaf spring, helical spring, rubber blanket etc.In the present embodiment, the torsion spring head 441 of torsion spring 44 is connected to guard shield 50 towards on the base 59 on workbench surface 21, and elastic component is connected to other position of guard shield 50, also can as on the inner surface that guard shield 50 covers saw blade sawtooth portion.The present embodiment also the diverse location on bench saw 100 can arrange several elastic components and lift to facilitate guard shield 50.
For protection user; see Fig. 1 and Fig. 2; one in guard shield 50 two guard shield sides 54 is also provided with protective plate 57 outward; protective plate 57 equally can around pivotal axis 41 phase broadsword v.broadsword 40 pivotable; simultaneously; protective plate 57 is provided with kidney slot 571 away from one end of pivotal axis 41, and the screw 58 be arranged on guard shield 50 is equipped with in kidney slot 571, and kidney slot 571 can move thus limit the scope of protective plate 57 phase broadsword v.broadsword 40 pivotable in the scope of screw 58 restriction.Composition graphs 4, when saw blade 31 installs the opposite side inclined cut of protective plate 57 to guard shield 50, guard shield 50 tilts with saw blade 31, this becomes large by causing guard shield 50 gap of installing between the base of protective plate side and workbench surface 21, if there is no protective plate 57, the finger of operator just easily stretches into this gap and causes injury, and protective plate 57 can cover this part gap must make operator not easily touch thus avoid injury.
The present embodiment is outside equipped with protective plate 57 due to a guard shield side 54, and therefore, saw blade 31 is general to the lopsidedness not installing protective plate 57, therefore, only can be provided with the second contact surface 55 not installing between the guard shield side 54 of protective plate 57 and the first contact surface.When do not arrange protective plate or protective plate 57 on the deflection of guard shield 50 do not form affect, preferably the second contact surface is all set between two guard shield sides 54 and the first contact surface, like this, no matter workpiece bearing of trend that is outer in which guard shield side 54 of guard shield 50 and saw blade groove 22 tilts, and workpiece all can contact with the second contact surface 55 thus guard shield easily be lifted.
Foregoing description is only list preferred embodiment of the present invention by way of example, instead of restriction the present invention, and all employings are equal to replacement or the technical scheme that obtains of equivalent transformation all drops in protection scope of the present invention.
Claims (7)
1. a bench saw, comprise pedestal, be arranged on the workbench on pedestal, with pedestal and one of them cutting assembly be connected of workbench, the chopper be connected with described cutting assembly, to be arranged on described chopper and can the guard shield of phase broadsword v.broadsword pivotable, described cutting assembly comprises motor and is rotated by motor driving and have the saw blade of side plane, stretch out the saw blade groove that described saw blade can be offered on the surface from workbench, described guard shield has the guard shield side being parallel to described saw blade side plane, the first contact surface of workpiece also can be contacted with described guard shield lateral vertical, it is characterized in that: be provided with for the second contact surface with absorption surface between described first contact surface and described guard shield side, described second contact surface is plane, the width of described second contact surface reduces gradually along the direction away from described workbench, and the angle between described second contact surface and described first contact surface is 135 degree, make when described saw blade side plane and workbench surface in angle of 45 degrees, the bearing of trend of described workpiece and described saw blade groove in angle of 45 degrees time, workpiece contacts completely with described second contact surface.
2. bench saw as claimed in claim 1, it is characterized in that: described first contact surface comprises the portion of being lifted away from, workpiece contacts with the described portion of being lifted away from and promotes described guard shield and moves along the direction away from described workbench surface, is lifted away between portion and described guard shield side described in described second contact surface is arranged on.
3. bench saw as claimed in claim 2, it is characterized in that: described in the portion of being lifted away from comprise the first abutment plane and second abutment plane of angled setting, relatively described first abutment plane of described second abutment plane is away from described workbench, and formed by described first abutment plane and described workbench surface, acute angle is less than acute angle formed by described second abutment plane and described workbench surface.
4. bench saw as claimed in claim 1, is characterized in that: described bench saw arranges elastic component, described elastic component towards away from the direction stating workbench surface active force is applied to described guard shield, this active force is less than the gravity of described guard shield.
5. bench saw as claimed in claim 4, it is characterized in that: described guard shield is arranged on chopper by pivotal axis, described elastic component is arranged on described pivotal axis.
6. bench saw as claimed in claim 5, is characterized in that: described elastic component is torsion spring, and described torsion spring set is located on described pivotal axis.
7. bench saw as claimed in claim 1, is characterized in that: described guard shield is arranged on chopper by pivotal axis, described pivotal axis is provided with bearing to support described guard shield and described pivotal axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110081649.7A CN102728887B (en) | 2011-04-01 | 2011-04-01 | Bench saw |
Applications Claiming Priority (1)
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| CN201110081649.7A CN102728887B (en) | 2011-04-01 | 2011-04-01 | Bench saw |
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| CN102728887B true CN102728887B (en) | 2015-07-01 |
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| CN103286376B (en) * | 2013-03-28 | 2015-11-18 | 攀钢集团攀枝花钢钒有限公司 | A kind of hot-metal sawing machine with water retaining cover |
| CN104741694A (en) * | 2013-12-26 | 2015-07-01 | 苏州宝时得电动工具有限公司 | Multifunctional bench saw |
| CN105729591A (en) * | 2016-02-29 | 2016-07-06 | 张成峰 | Dust collecting cover for electric circular saw and dust collecting method |
| CN108115764B (en) * | 2017-12-20 | 2020-09-22 | 福建杜氏木业有限公司 | Sawmilling device |
| CN110774391B (en) * | 2019-10-31 | 2021-10-12 | 大连北方互感器集团有限公司 | Lengthened and reinforced woodworking bench saw protective cover |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2613339Y (en) * | 2003-02-28 | 2004-04-28 | 墩豐机械工业股份有限公司 | Eye-protective lid protector for table-saw sawing blade |
| CN101530973A (en) * | 2008-03-11 | 2009-09-16 | 株式会社牧田 | Saw blade protectors |
| CN201543910U (en) * | 2009-11-10 | 2010-08-11 | 苏州宝时得电动工具有限公司 | Cutting machine and protective cover component thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090293693A1 (en) * | 2008-05-29 | 2009-12-03 | Yi-Te Liao | Workpiece splitting and kickback-inhibiting assembly for a table cutting machine |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2613339Y (en) * | 2003-02-28 | 2004-04-28 | 墩豐机械工业股份有限公司 | Eye-protective lid protector for table-saw sawing blade |
| CN101530973A (en) * | 2008-03-11 | 2009-09-16 | 株式会社牧田 | Saw blade protectors |
| CN201543910U (en) * | 2009-11-10 | 2010-08-11 | 苏州宝时得电动工具有限公司 | Cutting machine and protective cover component thereof |
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| CN102728887A (en) | 2012-10-17 |
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