• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An electric saw device with two saw blades (20, 30) arranged to allow the two saw blades to be driven to rotate in opposite directions. The two saw blades are shaped with resp. circular grooves (21, 31) on their inner surfaces at positions corresponding to each other while allowing the centers of the two circular grooves to be aligned with the axes of rotation of the corresponding saw blades. The electric saw device has a plurality of steel balls (40), each placed between the two saw blades and simultaneously inserted in the circular grooves to separate the two saw blades at a certain distance. Accordingly, when the two saw blades rotate in opposite directions, each of the steel balls acts as a rolling bearing to maintain the two saw blades so that they are properly separated from each other, thus preventing the two saw blades from overheating and weakening by friction (Fig. 8). )
    公开号:SE1150398A1
    申请号:SE1150398
    申请日:2011-05-05
    公开日:2012-05-30
    发明作者:John Chung-Kuang Chen
    申请人:Newstar Asia Ltd；
    IPC主号:
    专利说明:

    10152025302filled with sawn pieces 54, causing a motor to drive the two saw blades 50 and51 to rotate, burned by overload.
    Reference is now made to FIG. 2A, which shows a double blade construction with a pair ofsaw blades as described in WO 08/057028. The double blade construction shown in FIG. 2A isprimarily configured to solve the problem of sawn 54 pieces that are clamped betweensaw blades 50 and 51, as shown in FIG. IB, and the problem of the blade heads 42 and 43damaged by colliding with each other. As shown in FIG. 2A, it is in double-leafthe structure with the pair of saw blades 60 and 61, arranged on a circular fl end or rib 65 onthe second saw blade 61, which presses against an inner surface 64 of the first saw blade 60 tois used for the purpose of maintaining a gap to be formed between the two saw blades 60 and61. Essentially, the 65 end 65 is shaped to maintain a safe distance (0.03 mm) between the blades.heads 62 and 63 of the two saw blades 60 and 61 to allow the double bladethe construction works normally. Through fl änsen's 65 arrangements can further be prevented that theythe sawn pieces are clamped between the two saw blades 60 and 61.
    When the two saw blades 60 and 61 are used to perform a sawing process, heat will be generatedgenerated by the friction between the 65 end 65 and the first saw blade 60, and thereby it canthe first saw blade 60 is weakened, which can adversely affect the sawing precision. Furtherit is noted that after a period of use, wear and tear will occur eitheron the end 65, as shown in FIG. 2B, or on the first saw blade 60, as shown in FIG. 2C,and when the total wear of the 65 end 65 and the first saw blade 60 is equal to orgreater than the distance (0.03 mm) between the blade heads 62 and 63 of the two saw blades 60 and61, the blade heads 62 and 63 may collide with each other, so that the electric sawthe device can no longer operate normally and the saw blades 60 and 61 thus have to be replaced.
    Reference is now made to FIG. 3A and FIG. 3B, which are schematic illustrations showing oneconstruction capable of preventing the two saw blades in a sawing device from colliding witheach other by having steel balls placed between the two saw blades according to the prior art.point. As shown in FIG. 3A there are a number of steel balls 72 which are arranged at right angles andplaced between the first saw blade 70 and the second saw blade 71. By the arrangementof the number of steel balls 72, the two saw blades 70 and 71 can consequently be separated correctlyfrom each other, and consequently the two saw blades 70, 71 are prevented from overheating byl0152025303friction and thus weakened. However, wear and tear can also occurof the steel balls 72 after they have been used for a period of time, causing the blade heads to73 and 74 collide with each other. In the state when the blade heads 73 and 74 collide witheach other as a result of wear and tear of the steel balls 72, the steel balls 72 mustreplaced. Thus, there is a need for a design that can reduce wear and tearthe wear of the steel balls 72 in order to extend the life of the steel balls 72, in order toimprove the usability of the electric sawing device.
    SUMMARY OF THE INVENTIONThe primary object of the present invention is to provide an electric sawdevice with two saw blades arranged to allow a number of steel balls to be arrangedin between to separate the two saw blades at a certain distance, and toby preventing the two saw blades from overheating by friction and thereby weakening.
    The secondary object of the present invention is to provide an electric sawarranging with two saw blades, and with the ability to enable the frictional resistance of eachsteel ball arranged between the two saw blades is reduced with increasing number of steel ballsarranged, and thus to reduce the wear and tear of the steel balls whilethe service life of these is extended.
    To achieve the above objects, the present invention provides an electric sawarrangement with two saw blades, ie. a first saw blade and a second saw blade, arranged tocause the two saw blades to be driven to rotate in opposite directions, in which the two saw blades areshaped with resp. circular grooves on their inner surfaces and at corresponding positions,while making it possible for the centers of the two circular grooves to be aligned withthe axes of rotation of their corresponding saw blades, and wherein the electric saw devicefurthermore, a number of steel balls, each placed between the two saw blades whilesimultaneously inserted into the circular grooves to separate the two saw blades by a certaingap.
    In one embodiment of the invention, the amount of steel balls to be arranged is between the twothe saw blades are not large enough to fill the entire circular grooves, while each arcsection which has no ball inserted in it, in each circular groove, is allowed to be less than 12010l52025304degrees, thereby enabling the number of steel balls to be arranged at any given timeforming a three-point support mechanism while being rotatably positioned in the circularthe tracks.
    In one embodiment of the invention, the portion of each steel ball is inserted into one of the twocircular grooves less than half the volume of the steel ball to ensure that the steel ball rotatesj subject.
    In one embodiment of the invention, each of the steel balls is magnetized toenable it to be attached to the saw blade, and thereby facilitate the assembly ofthe steel balls.
    Additional scope of usefulness under the present application will be moreapparent from the following detailed description. However, it should be understood thatearly as the detailed description and the specific examples indicate preferredforms of the invention are given these for illustrative purposes only when various changes andmodifications that fall within the spirit and scope of the invention will beobvious to those skilled in the art on the basis of this detailed description.
    BRIEF DESCRIPTION OF THE DRAWINGSThe present invention will be more fully understood by reference to the detailed inventiondescription given below and the accompanying drawings given by way of illustration only anddoes not limit the invention, and on which:FIG. 1A is a schematic illustration showing a double blade construction with two saws.sheets according to the state of the art.
    FIG. lB is a schematic illustration showing how a sawn piece can be clamped betweentwo saw blades in the double blade construction shown in FIG. la.
    FIG. 2A shows a double blade construction with a pair of saw blades, described in WO 08/057028,FIG. 2B is a schematic illustration showing a state where the end of FIG. 2A is worn.10152025305FIG. 2C is a schematic illustration showing a state where one of the saw blades of FIG. 2Ais worn.
    FIG. 3A is a schematic illustration showing a double blade structure configuredwith steel balls inserted between the two saw blades according to the prior art.
    FIG. 3B is a rear view of the double blade assembly shown in FIG. 3A.
    FIG. 4 is a cross-sectional view of an electric saw device according to an embodiment of the invention;the finding.
    FIG. 5 is an exploded view of a double blade construction consisting of a first saw bladeand a second saw blade according to the present invention.
    FIG. 6 is a front view of the second saw blade of FIG. 5.
    FIG. 7 is a rear view of the first saw blade of FIG. 5.
    FIG. 8 is a partial enlarged view of the double blade structure shown in FIG. 5.
    DESCRIPTION OF EXEMPLARATIVE EMBODIMENTSFor a better understanding of and insight into the functions performed and structuralthe characters of the invention are presented in the following a number of exemplary embodimentsforms in conjunction with the detailed description.
    Referring to FIG. 4 which is a cross-sectional view of an electric saw device according to an embodimentembodiment of the invention. In the electric sawing device 1, as shown in FIG. 4,two gears 11 and 12 of a motor drive shaft 10 so that they rotate at the same speed inopposite directions. The gear 11 is attached to a PTO shaft 13, the PTO shaft 13 isattached to a small transmission shaft 14, and the transmission shaft 14 is coupled to a firstsaw blade 20 to drive the same to rotate. The second gear 12 is attached to a large onetransmission shaft 15, and the large transmission shaft 15 is coupled to a second saw blade 3010152025306to drive this to rotate. When the electric sawing device 1 operates, they are thereby drivenfirst and second saw blades 20 and 30 to rotate in opposite directions.
    Referring to FIG. 5 which is an exploded view of a double blade construction consisting of onefirst saw blade and a second saw blade according to the present invention. As shown in FIG. 5, isthe first saw blade 20 formed with a circular groove 21 at its surface, i.e. the rearthe end of the first saw blade 20, while the second saw blade 30 is also formed with onecircular groove 31 at its inner surface, i.e. the front end of the second saw blade 30, throughthat the two circular grooves 21 and 31 are arranged at corresponding positions. So-shown in FIG. 6 and FIG. 7, the circular groove 21 in the first saw blade 20 is formed witha diameter equal to that of the circular groove 31 in the second saw blade 30, and isfurther centers of the two circular grooves 21 and 31 arranged at positions aligned in linewith the axes of rotation of their corresponding saw blades 20 and 30. In addition, it has electricthe sawing device 1 further comprises a number of steel balls 40 in such a way that each of the number of steel ballsballs 40 are placed between the two saw blades 20 and 30 while being inserted into them simultaneouslycircular grooves 21 and 31 to separate the two saw blades 20 and 30 by a fixed onegap. Referring to FIG. 8 which is a partial enlarged view of the double-leafthe construction shown in FIG. 5. As shown in FIG. 8, is the contact between the twosaw blades 20 and 30, through the rolling of the steel balls 40, a rolling contact, so that the frictionwhich is the result of this rolling contact is iron-bearing small, and thus it comestemperature increase that results from such friction not to be too great. Consequently,the sawing precision is improved and the service life of the saw blades 20 and 30 is extended because the twothe saw blades 20 and 30 will not be weakened by overheating. Because wear andwear of these steel balls 40 can be noticed in its early stages by a user ifthe sound from the working electric sawing device 1 becomes too loud, the user can at the same timesimply replace the worn steel balls 40 before the steel balls 40 are worn down too much so that theycould cause the two rotating saw blades 20 and 30 to collide with each other andthereby damaged. The early detection of worn steel balls can thus help toprevent the cost of replacing the entire double blade construction with the first and second onessaw blades 20 and 30, whereby the maintenance cost can be reduced.
    The construction principle of the invention is that the amount of steel balls 40 to be arrangedbetween the two saw blades 20 and 30 should not be large enough to fill the entire circular grooves1015202530721 and 31, while leaving each arcuate section having no steel ball 40 insertedtherein, in each circular groove, be less than 120 degrees. This enables an arrangementof tal number of steel balls 40 so that they form a three-point support mechanism at each time whilethey are rotatably inserted in the circular grooves 21 and 31. It should be noted that if the circular onesgrooves 21 and 31 are filled with the steel balls 40, the rolling of each steel ball 40 can be easily prevented byits adjacent steel balls, which cause the two saw blades 20 and 30 to get stuck. In order toin addition, to facilitate the even rolling of each steel ball 40 in the circular grooves 21 and 31, it shouldportion of each steel ball 40 inserted into the circular grooves 21 be less than halfthe volume of the steel ball 40, while the portion of the same steel ball 40 which is simultaneously inserted into oneother circular groove 31 should also be less than half the volume of the steel ball 40. Byarranging the plurality of steel balls 40 so that they are distributed in a comparatively large area can furtherthe friction against each of the steel balls 40 is reduced and for that reason thethe wear and tear of each steel ball, so that the life of each steel ball 40 is extended.
    As shown in FIG. 8, the blade head 23 of the first saw blade 20 is arranged so that it protrudesoutwards from the inner surface 22 of the first saw blade 20 by 0.11 mm, and is also the second saw bladeBlade head 33 arranged so as to protrude outwardly from the inner surface 32 of the saw blade 30 with0.11 mm, at the same time as the blade head 23 of the first saw blade 20 and the second saw blade 30saw head 33 are separated by 0.03 mm. Accordingly, the first saw blade 20inner surface 22 separated from the inner surface 32 of the second saw blade 30 by a distance of 0.25 mm, andis the width, measured from the portion of each steel ball 40 not inserted in the circular grooves 21and 31, 0.25 mm.
    To ensure that the steel balls 40 do not easily fall out while being inserted into the circular onesthe grooves 21 and 31 of the first saw blade 20 and the second saw blade 30, are the steel balls 23magnetized to enable them to be applied to the saw blades 20 and 30, and thusthe assembly of the steel balls 40 is facilitated,In summary, the present invention provides an electric sawing devicetwo saw blades 20 and 30, which are arranged to allow a number of steel balls 40 to be provided.in between to achieve a type of rolling support mechanism between the two saw blades 20and 30, and thereby preventing the two saw blades 20 and 30 from overheating throughfriction and at the same time allow the sawing precision of the two saw blades 20 and 30108improved and to also allow the life of the two saw blades 20 and 30 to be extended.
    Furthermore, the present invention provides an electric saw device with two saw blades,which can enable the wear and tear of each steel ball arranged between themtwo saw blades, are reduced with increasing amount of steel balls arranged, and thus thatthe service life of these is extended as the requirement to replace the steel balls is minimized.
    With regard to the above description, it should be understood that the optimal dimensionalthe conditions of the parts of the invention, including variations in size,material, design, form, function and working method, assembly and use, are judged to bevery clear and obvious to those skilled in the art, and that all equivalentto those illustrated in the drawings and described in the description shall be consideredtaken by the present invention.
    权利要求:
    Claims (4)
    [1]
    An electric saw device having a first saw blade and a second saw blade arranged to allow the two saw blades to be driven to rotate in opposite directions; wherein the two saw blades are formed with respective circular grooves on their inner surfaces at positions corresponding to each other, while it is possible for centers of the two circular grooves to be aligned with the axes of rotation of its corresponding saw blades, and wherein the electric saw device furthermore, it has a number of steel balls, each placed between the two saw blades and simultaneously inserted in the circular grooves to separate the two saw blades at a certain distance.
    [2]
    The electric saw device of claim 1, wherein each of the ståls of steel balls is magnetized to allow them to be applied to the saw blades.
    [3]
    An electric saw device according to claim 1, wherein the amount of steel balls to be arranged between the two saw blades is not large enough to fill the entire circular grooves, while allowing each arc section having no ball inserted therein, in each circular groove, to be less than 120 degrees.
    [4]
    An electric saw device according to claim 1, wherein the portion of each steel ball inserted in one of the two circular grooves is less than half the volume of the steel ball.
    类似技术:
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    同族专利:
    公开号 | 公开日
    CN102476221A|2012-05-30|
    US20120132048A1|2012-05-31|
    GB2485856A|2012-05-30|
    DE102011050114A1|2012-05-31|
    FR2967928A1|2012-06-01|
    GB201107982D0|2011-06-29|
    引用文献:
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    CN105345935B|2015-12-07|2017-04-05|苏友谊|The big plate stonecutter of ultra-thin variable break bar and processing method|
    CN105537680B|2016-02-23|2019-01-29|王朝永|Pipe fitting multitool cutter device|
    法律状态:
    2013-06-25| NAV| Patent application has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    CN2010105634541A|CN102476221A|2010-11-29|2010-11-29|Electric saw device with double saw blades|
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