WO2013086665A1 - 电锯装置的机头结构 - Google Patents

电锯装置的机头结构 Download PDF

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Publication number
WO2013086665A1
WO2013086665A1 PCT/CN2011/002237 CN2011002237W WO2013086665A1 WO 2013086665 A1 WO2013086665 A1 WO 2013086665A1 CN 2011002237 W CN2011002237 W CN 2011002237W WO 2013086665 A1 WO2013086665 A1 WO 2013086665A1
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Prior art keywords
saw blade
transmission shaft
drive shaft
small
thickness
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PCT/CN2011/002237
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English (en)
French (fr)
Inventor
陈重光
Original Assignee
新杰亚洲有限公司
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Application filed by 新杰亚洲有限公司 filed Critical 新杰亚洲有限公司
Publication of WO2013086665A1 publication Critical patent/WO2013086665A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/10—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a plurality of circular saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B5/00—Sawing machines working with circular or cylindrical saw blades; Components or equipment therefor
    • B27B5/29—Details; Component parts; Accessories
    • B27B5/30—Details; Component parts; Accessories for mounting or securing saw blades or saw spindles
    • B27B5/34—Devices for securing a plurality of circular saw blades on a single saw spindle; Equipment for adjusting the mutual distance

Definitions

  • the invention relates to a head structure of a chainsaw device, which is provided with a large transmission shaft and a small transmission shaft that rotate coaxially to respectively rotate the inner saw blade and the outer saw blade for reverse rotation.
  • the nose structure bearing of the present invention has the same protruding width as the thickness of the saw blade, and the inner and outer saw blades are separated by a C-shaped snap ring for the positioning bearing.
  • the double saw blade sawing device opens the workpiece by simultaneously driving an inner saw blade and an outer saw blade for reverse rotation.
  • Figure 1 shows the head structure of the existing double saw blade saw.
  • the power saw device is driven by a power output shaft 10 to rotate the two helical gears 11, 12 at a constant rate.
  • the first helical gear 11 is fixed to a small transmission shaft 13, and the small transmission shaft 13 can drive an outer saw blade to rotate 14.
  • the second bevel gear 12 is fixed to a large drive shaft 15 which can drive an inner saw blade 16 to rotate.
  • the small transmission shaft 13 penetrates the hollow shaft of the large transmission shaft 15 and protrudes the outer end of the large transmission shaft 15 to drive the outer saw blade 14 to rotate.
  • the cutter head 161 of the inner saw blade 16 protrudes from the outer side surface 162 of the inner saw blade 16 to have a size of 0.11 mm.
  • the cutter head 141 of the outer saw blade 14 protrudes from the inner side surface 142 of the outer saw blade 14 to have a size of 0.1 > 1 mm.
  • the cutter head 161 of the inner saw blade 16 and the cutter head 141 of the outer saw blade 14 should have a safety clearance of 0.03 mm. Therefore, the distance between the outer side surface 162 of the inner saw blade 16 and the inner side surface 142 of the outer saw blade 14 should be 0.25 mm.
  • FIG. 4 shows a double saw blade structure disclosed in WO 08/057028, which is mainly provided with a ridge 163 on the inner saw blade 16, by which the rib 163 abuts against the outer saw blade 14 Side 142 to limit the spacing between the two saw blades 16 and 14 to 0.25 mm.
  • the ribs 163 are arranged such that the two saw blades 16, 14 between the cutter heads 1 61 and 141 are a safe and normally applicable spacing (0.03 mm), so that the two saw blades 16 and 14 The cutter heads 1 61, 141 do not create a frictional collision.
  • frictional heat is generated between the ribs 163 and the outer saw blade 14, which causes the outer saw blade 14 to soften, which affects the cutting accuracy.
  • the main object of the present invention is to provide a head structure of a sawing device, which makes the structure of the machine head more compact by virtue of the position of the bearing, and can maintain a good spacing between the two saw blades, so that the two saws The blade head of the piece is not in contact, avoiding friction and heat generation, so as to improve cutting precision.
  • the present invention provides a head structure of a power saw device
  • the head of the power saw device includes a power output shaft, the power output shaft drives a large transmission shaft and a small transmission shaft, the large transmission The shaft rotates in opposite directions with the small transmission shaft; the small transmission shaft can drive an outer saw blade to rotate; the large transmission shaft can drive an inner saw blade to rotate; the large transmission shaft has a hollow shaft center for the small a transmission shaft penetrating; wherein, each bearing disposed between the large transmission shaft and the small transmission shaft includes an outer bearing disposed near an outer end of the large transmission shaft; an outer end of the outer bearing protrudes an outer end of the large transmission shaft And the protruding width is equal to the thickness of the inner saw blade such that the outer edge of the outer bearing is on the same vertical cut surface as the outer side surface of the inner saw blade; the small drive shaft is embedded with a thickness of 0.25 mm to 0.28 mm.
  • the C-shaped buckle can define a position of the outer bearing; the inner side of the outer saw blade abuts the C-shaped buckle, the inner side of the outer saw blade and the inner saw blade Outside Thickness is the distance between the C-shaped retaining ring.
  • the head structure of the electric saw device wherein the outer end of the large transmission shaft is provided with at least two equiangularly spaced protrusions; the inner saw blade is oppositely provided with perforations for embedding the bumps, and can be made larger
  • the drive shaft rotates; each of the bumps on the large drive shaft is provided with a screw hole for screwing into the screw, and the inner saw blade is pressed by the head of the screw to prevent the inner saw blade from falling off.
  • the head structure of the electric saw device wherein the thickness of the head of the screw is not greater than the thickness of the C-shaped buckle.
  • the head structure of the electric saw device wherein the thickness of the head of the screw is 0.24mm ⁇ 0.28mm.
  • the head structure of the electric saw device wherein the outer peripheral wall of the outer end of the small drive shaft is provided with at least three grooves arranged at equal angular intervals; the central perforated hole walls of the outer saw blade are oppositely disposed to be respectively embedded a convex portion in each of the grooves, the outer saw blade can be rotated by a small transmission shaft; the small transmission shaft is provided with a screw hole for screwing a screw, and the outer saw blade is pressed by the head of the screw, Prevent the outer saw blade from coming off.
  • Figure 1 is a structural view of a handpiece of a conventional electric saw device
  • Figure 2 is a schematic view showing the spacing of the double saw blade of Figure 1;
  • Figure 3 is a contact state diagram of the cutter head of the double saw blade shown in Figure 2;
  • Figure 4 is a structural view of the double saw blade disclosed in WO 08/057028;
  • Figure 5 is a structural view of the handpiece of the present invention.
  • Figure 6 is a partial enlarged view of Figure 5;
  • Figure 7 is a partial exploded view of Figure 5.
  • FIG. 5 Please refer to FIG. 5 for a structural view of the electric saw device.
  • the power saw device is driven by a power output shaft 20 to rotate the two helical gears 21, 22 at a constant rate.
  • the first helical gear 21 is fixed to a small transmission shaft 30, and the small transmission shaft 30 can drive an outer saw blade to rotate 50.
  • the second bevel gear 22 is fixedly coupled to a large drive shaft 40 that can drive an inner saw blade 60 to rotate.
  • the inner saw blade 60 rotates in opposite directions with the outer saw blade 50.
  • the large transmission shaft 40 has a hollow shaft center for the small transmission shaft 30 to penetrate, and the small transmission shaft The outer end of the 30 protrudes from the outer end of the large drive shaft 40.
  • each of the bearings 23, 26 disposed between the large transmission shaft and the small transmission shaft includes an outer bearing 26 disposed near the outer end of the large transmission shaft 40.
  • the outer end of the outer bearing 26 projects from the outer end of the large drive shaft 40 and has a protruding width equal to the thickness of the inner saw blade 60.
  • a small C-ring 31 is embedded in the small drive shaft 30 to define the position of the outer bearing 26.
  • the inner side surface 52 of the outer saw blade 50 abuts the C-shaped buckle 31 so that the distance between the inner side surface 52 of the outer saw blade 50 and the outer side surface 62 of the inner saw blade 60 is the C-shaped buckle 31 thickness.
  • the C-shaped buckle has a thickness 31 between 0.25 mm and 0.28 m.
  • the width of the outer side surface 62 of the cutter head 61 minus the inner saw blade 60 is 0.1 1 mm
  • the width of the inner side surface 52 of the cutter head 51 of the outer saw blade 50 is 0.1 1 mm, and there is a gap of 0.03 mm to 0.06 mm.
  • the cutter heads 52, 62 are prevented from rubbing against each other.
  • the C-shaped buckle 31 has a thickness of 0.25 mm.
  • the outer end of the large transmission shaft 40 is provided with at least two equiangularly spaced projections 41.
  • Four bumps 41 are provided in this embodiment.
  • the inner saw blade 60 is oppositely disposed with a through hole 63 into which each of the bumps 41 is fitted. Then, the large drive shaft 40 can drive the inner saw blade 60 to rotate.
  • the protruding length of the bump 41 is not greater than the depth of the through hole 63, and can be hidden in the through hole 63.
  • Each of the projections 41 on the large transmission shaft 40 is provided with a screw hole 42 for screwing the screw 43 and pressing the inner blade 60 by the head 431 of the screw 43 to prevent the inner blade 60 from coming off.
  • the thickness of the head 431 of the screw 43 is not greater than the thickness of the C-shaped clasp 31.
  • the thickness of the head 431 of the screw 43 is 0.24 to 0.28 mm. If the thickness of the head portion 431 of the screw 43 is the same as the thickness of the C-shaped buckle 31, the screw 43 also functions to separate the inner saw blade 60 from the outer saw blade 50, and the head portion 431 of the screw 43 can be combined with the outer saw blade 50.
  • the inner side 52 creates contact and acts as a dependency on the outer saw blade 50.
  • the outer peripheral wall of the outer end of the small transmission shaft 30 is provided with at least three grooves 32 arranged at equal angular intervals.
  • the wall of the central perforation 53 of the outer saw blade 50 is oppositely disposed with projections 54 that are respectively inserted into the recesses 32. Then the small drive shaft 30 can drive the outer saw blade 50 to rotate.
  • the small transmission shaft 30 is provided with a screw hole 33 for screwing in the screw 34 and by means of the screw 34
  • the head portion 341 presses the outer saw blade 50 to prevent the outer saw blade 50 from coming off.
  • a bearing 26 is disposed at the outer end of the large transmission shaft 40, so that the accuracy of the coaxial rotation of the large transmission shaft 40 and the small transmission shaft 30 is improved.
  • the present invention utilizes the bearing 26 to highlight the characteristics of the width of the large transmission shaft 40 equal to the thickness of the inner saw blade 60, and the use of a C-shaped buckle 31 of appropriate thickness to position the bearing 26 and the outer saw blade 50 such that the inner saw blade 60 and the outer side
  • the spacing between the saw blades 50 can prevent the cutter heads 61, 51 from contacting each other, so that the problems of frictional heat generation between the cutter heads 61, 51 do not occur, and the accuracy during cutting is improved; and the cutter heads 61, 51 do not occur each other.
  • the problem of hitting can improve the service life of the saw blades 60, 50.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Abstract

公开了一种电锯装置的机头结构，该结构由一动力输出轴（20）传动一大传动轴（40）及一小传动轴（30）做反向转动。该小传动轴（30）可带动一外侧锯片（50）转动，该大传动轴（40）可带动一内侧锯片（60）转动。该大传动轴（40）具有中空状的轴心，以供该小传动轴（30）贯穿。设置在大传动轴（40）与小传动轴（30）之间的各轴承中，有一设置在接近该大传动轴（40）外端的外侧轴承（26）。该外侧轴承（26）的外端突出该大传动轴（40）的外端，且突出的宽度等于该内侧锯片（60）的厚度，使该外侧轴承（26）的外缘与该内侧锯片（60）的外侧面在同一铅直切面上。该小传动轴（30）上嵌设一厚度在0.25mm-0.28mm之间的C形扣环（31）。该C形扣环（31）能够限定该外侧轴承（26）的位置。该外侧锯片（50）的内侧面贴靠该C形扣环（31），使该外侧锯片（50）的内侧面与该内侧锯片（60）的外侧面之间的距离即为C形扣环（31）的厚度。

Description

电锯装置的机头结构
技术领域
本发明为一种电锯装置的机头结构， 其设置同轴心旋转的大传动轴 与小传动轴， 以分别传动内侧锯片与外侧锯片做反向旋转。 本发明的机 头结构轴承的突出宽度与锯片的厚度相同， 以及利用定位轴承用的 C形 扣环分隔内侧锯片与外侧锯片。 背景技术
双锯片的电锯装置凭借同时驱动一内侧锯片与一外侧锯片做反向旋 转， 而锯开工作件。 图 1 所示为现有双锯片电锯的机头结构。 电锯装置 由一动力输出轴 10传动两个斜齿轮 11、 12等速率的反向旋转。 其中， 第一斜齿轮 11 与一小传动轴 13 固接， 该小传动轴 13可带动一外侧锯 片转动 14。 第二斜齿轮 12与一大传动轴 15 固接， 该大传动轴 15可带 动一内侧锯片 16转动。 当该电锯装置运转时， 该内侧锯片 16与外侧锯 片 14作反向旋转。 其间， 该小传动轴 13贯穿该大传动轴 15 的中空轴 心， 并突出大传动轴 15的外端， 而带动外侧锯片 14旋转。
请参阅图 2。 该内侧锯片 16的刀头 161 突出该内侧锯片 16外侧面 162 的尺寸为 0.11mm。 该外侧锯片 14 的刀头 141 突出该外侧锯片 14 内侧面 142 的尺寸为 0.1>1mm。 该内侧锯片 16 的刀头 161 与外侧锯片 14的刀头 141应保留有 0.03mm的安全间隙。 故该内侧锯片 16的外侧 面 162与外侧锯片 14的内侧面 142之间距应为 0.25mm。
电锯装置进行切削工作时， 内侧锯片 16与外侧锯片 14刀头 161、 141 若产生接触， 会因接触摩擦而容易产生高热而软化， 使该两个锯片 16、 14的刀头 161、 141 产生碰撞 （如图 3所示）， 从而导致刀头 161、 141 脱落或打碎， 使锯片 16、 14使用寿命降低。 为避免内侧锯片 16与 外侧锯片 14的刀头 161、 141 产生不当接触，该内侧锯片 16的刀头 161 与外侧锯片 14的刀头 141之间应留有 0.03mm的间距， 见图 2。
图 4所示为 WO 08/057028所揭露的一种双锯片结构， 其主要在内 侧锯片 16上设置一圏凸条 163， 凭借该凸条 163抵靠在外侧锯片 14 内 侧面 142， 以限制该两个锯片 1 6、 14间的间距为 0.25mm。 该凸条 1 63 的设置可使该两个锯片 16、 14刀头 1 61、 141 间， 为一安全且可正常施 作的间距 （ 0.03mm )， 使两个锯片 1 6、 14的刀头 1 61、 141 不会产生摩 擦碰撞。 该两个锯片 1 6、 14进行切削工作时， 该凸条 1 63 与外侧锯片 14之间会产生摩擦生热， 使该外侧锯片 14有软化的情形发生， 影响切 削精度。 发明内容
本发明的主要目的在于提供一种电锯装置的机头结构， 其凭借轴承 的设置位置， 使机头的结构更为精简， 且能使该两个锯片间保持良好间 距， 使两个锯片的刀头呈不接触状， 避免摩擦生热， 以提高切削精度。
为达上述目的， 本发明提供一种电锯装置的机头结构， 该电锯装置 的机头包含设置有动力输出轴， 该动力输出轴传动一大传动轴及一小传 动轴， 该大传动轴与该小传动轴做反向转动； 该小传动轴能够带动一外 侧锯片转动； 该大传动轴能够带动一内侧锯片转动； 该大传动轴具有中 空状的轴心， 以供该小传动轴贯穿； 其中， 设置在大传动轴与小传动轴 之间的各轴承中， 包含有一设置在接近该大传动轴外端的外侧轴承； 该 外侧轴承的外端突出该大传动轴的外端， 且突出的宽度等于该内侧锯片 的厚度，使该外侧轴承的外缘与该内侧锯片的外侧面在同一铅直切面上； 该小传动轴上嵌设一厚度在 0.25mm~0.28mm之间的 C形扣环； 该 C形 扣环能够限定该外侧轴承的位置；该外侧锯片的内侧面贴靠该 C形扣环， 使该外侧锯片的内侧面与该内侧锯片的外侧面之间的距离即为 C形扣环 的厚度。
所述的电锯装置的机头结构， 其中， 该大传动轴的外端设置至少两 个等角度间隔设置的凸块； 该内侧锯片相对设置供各凸块嵌入的穿孔， 而能够由大传动轴带动旋转； 该大传动轴上的每一凸块设置有一螺孔， 供螺钉螺入， 凭借螺钉的头部制压该内侧锯片， 防止该内侧锯片脱落。
所述的电锯装置的机头结构， 其中， 该螺钉的头部的厚度不大于该 C形扣环的厚度。
所述的电锯装置的机头结构， 其中 ， 该螺钉的头部的厚度为 0.24mm~0.28mm。
所述的电锯装置的机头结构， 其中， 该小传动轴的外端的外周壁设 置至少三个等角度间隔设置的凹槽； 该外侧锯片的中央穿孔的孔壁相对 设置有能够分别嵌入该各凹槽内的凸部， 该外侧锯片能够由小传动轴带 动旋转； 该小传动轴上设置有一螺孔， 供一螺钉螺入， 并凭借螺钉的头 部制压该外侧锯片， 防止该外侧锯片脱落。 附图说明
图 1 为现有电锯装置的机头结构图；
图 2为图 1 双锯片的间距示意图；
图 3为图 2所示双锯片的刀头接触状态图；
图 4为 WO 08/057028案中所揭露的双锯片结构图；
图 5为本发明的机头结构图；
图 6为图 5的局部放大图；
图 7为图 5的局部分解图。
附图标记说明： 1 0-电机动力轴； 1 1 -斜齿轮； 12-斜齿轮； 13-小传 动轴； 14-外侧锯片； 141 -刀头； 15-大传动轴； 16-内侧锯片； 161 -刀头； 20-电机动力轴； 21 -斜齿轮； 22-斜齿轮； 23-轴承； 24-轴承； 25-轴承； 26-轴承； 30-小传动轴； 31 -C 形扣环； 32-凹槽； 33-螺孔； 34-螺钉； 341 -头部； 40-大传动轴； 41 -凸块； 42-螺孔； 43-螺钉； 431 -头部； 50- 外侧锯片； 51 -刀头； 42-内侧面； 53-穿孔； 54-凸部； 60-内侧锯片； 61 - 刀头； 62-外侧面； 63-穿孔。 具体实施方式
请参阅图 5所示为电锯装置的结构图。 电锯装置由一动力输出轴 20 传动两个斜齿轮 21、 22等速率的反向旋转。 其中， 第一斜齿轮 21 与一 小传动轴 30 固接， 该小传动轴 30可带动一外侧锯片转动 50。 第二斜齿 轮 22与一大传动轴 40固接，该大传动轴 40可带动一内侧锯片 60转动。 当该电锯装置运转时， 该内侧锯片 60与外侧锯片 50作反向旋转。' 该大 传动轴 40具有中空状的轴心， 以供该小传动轴 30贯穿， 且该小传动轴 30的外端突出大传动轴 40的外端。
请参阅图 6与图 7。 为了使该大传动轴 40与小传动轴 30能够以同 轴心旋转， 而在机头内部设置数个轴承 23、 24、 25、 26。 其中， 设置在 大传动轴与小传动轴之间的各轴承 23、 26 中， 包含有一设置在接近该 大传动轴 40外端的外侧轴承 26。该外侧轴承 26的外端突出该大传动轴 40 的外端， 且突出的宽度等于该内侧锯片 60 的厚度。 当将该内侧锯片 60组装在该大传动轴 40上后， 该外侧轴承 26 的外缘与该内侧锯片 60 的外侧面 62在同一铅直切面上。 该小传动轴 30上嵌设一 C形扣环 31 , 以限定该外侧轴承 26的位置。 该外侧锯片 50的内侧面 52贴靠该 C形 扣环 31 , 使该外侧锯片 50 的内侧面 52 与该内侧锯片 60 的外侧面 62 之间的距离即为 C 形扣环 31 的厚度。 该 C 形扣环厚度 31 在 0.25mm~0.28m m之间。扣除内侧锯片 60的刀头 61 凸出外侧面 62的宽 度 0.1 1 mm , 与外侧锯片 50的刀头 51 凸出内侧面 52的宽度 0.1 1 mm， 尚有 0.03mm~0.06mm的间隙， 以避免刀头 52、 62相互摩擦。 实作中， 该 C形扣环 31厚度以 0.25mm为最佳。
前述大传动轴 40 的外端设置至少两个等角度间隔设置的凸块 41。 本实施例中设置四个凸块 41。该内侧锯片 60相对设置可供各凸块 41 嵌 入的穿孔 63。 则该大传动轴 40 能够带动该内侧锯片 60 旋转。 该凸块 41 的凸出长度不大于该穿孔 63的深度， 而能够隐入穿孔 63 内。 该大传 动轴 40上的每一凸块 41设置有一螺孔 42 , 可供螺钉 43螺入， 并凭借 螺钉 43 的头部 431 制压该内侧锯片 60 , 防止该内侧锯片 60脱落。 此 外， 该螺钉 43 的头部 431 的厚度不大于该 C形扣环 31 的厚度。 螺钉 43的头部 431 的厚度为 0.24~0.28mm。若螺钉 43头部 431 的厚度与 C 形扣环 31 的厚度相同时， 该螺钉 43 亦有分隔内侧锯片 60与外侧锯片 50的作用， 且螺钉 43的头部 431 能够与外侧锯片 50的内侧面 52产生 接触， 而作为外侧锯片 50的依靠。
所述小传动轴 30 的外端的外周壁设置至少三个等角度间隔设置的 凹槽 32。该外侧锯片 50的中央穿孔 53的孔壁相对设置有可分别嵌入该 各凹槽 32 内的凸部 54。则该小传动轴 30能够带动该外侧锯片 50旋转。 该小传动轴 30上设置有一螺孔 33， 可供螺钉 34螺入， 并凭借螺钉 34 的头部 341 制压该外侧锯片 50， 防止该外侧锯片 50脱落。
本发明的机头结构中将一轴承 26设置在大传动轴 40的外端， 使大 传动轴 40与小传动轴 30作同轴心旋转的精确度提高。 本发明运用轴承 26突出大传轴 40的宽度与内侧锯片 60的厚度相等的特性， 以及运用适 当厚度的 C形扣环 31 来定位轴承 26与外侧锯片 50 , 使内侧锯片 60与 外侧锯片 50之间的间隔能够避免刀头 61、 51相互接触， 就不会发生刀 头 61、 51 相互摩擦生热的问题， 提高切削时的准确性； 更不会发生刀 头 61、 51相互打击的问题， 能够提高锯片 60、 50的使用寿命。
以上说明对本发明而言只是说明性的， 而非限制性的， 本领域普通 技术人员理解， 在不脱离所附说明书所限定的精神和范围的情况下， 可 做出许多修改、 变化或等效， 但都将落入本发明的保护范围内。

Claims

权 利 要 求
1 .一种电锯装置的机头结构， 该电锯装置的机头包含设置有动力输 出轴， 该动力输出轴传动一大传动轴及一小传动轴， 该大传动轴与该小 传动轴做反向转动； 该小传动轴能够带动一外侧锯片转动； 该大传动轴 能够带动一内侧锯片转动； 该大传动轴具有中空状的轴心， 以供该小传 动轴贯穿； 其特征在于：
设置在大传动轴与小传动轴之间的各轴承中， 包含有一设置在接近 该大传动轴外端的外侧轴承； 该外侧轴承的外端突出该大传动轴的外端， 且突出的宽度等于该内侧锯片的厚度， 使该外侧轴承的外缘与该内侧锯 片 的外侧 面在 同 一铅直切面 上； 该小传动轴上嵌设一厚度在 0.25mm~0.28mm之间的 C形扣环； 该 C形扣环能够限定该外侧轴承的 位置； 该外侧锯片的内侧面贴靠该 C形扣环， 使该外侧锯片的内侧面与 该内侧锯片的外侧面之间的距离即为 C形扣环的厚度。
2.如权利要求 1 所述的电锯装置的机头结构， 其特征在于： 该大传 动轴的外端设置至少两个等角度间隔设置的凸块； 该内侧锯片相对设置 供各凸块嵌入的穿孔， 而能够由大传动轴带动旋转； 该大传动轴上的每 一凸块设置有一螺孔， 供螺钉螺入， 螺钉的头部制压该内侧锯片。
3.如权利要求 2 所述的电锯装置的机头结构， 其特征在于： 该螺钉 的头部的厚度不大于该 C形扣环的厚度。
4.如权利要求 3 所述的电锯装置的机头结构， 其特征在于： 该螺钉 的头部的厚度为 0.24mm~0.28mm。
5.如权利要求 1 所述的电锯装置的机头结构， 其特征在于： 该小传 动轴的外端的外周壁设置至少三个等角度间隔设置的凹槽； 该外侧锯片 的中央穿孔的孔壁相对设置有能够分别嵌入该各凹槽内的凸部， 该外侧 锯片能够由小传动轴带动旋转； 该小传动轴上设置有一螺孔， 供一螺钉 螺入， 螺钉的头部制压该外侧锯片。
PCT/CN2011/002237 2011-12-15 2011-12-31 电锯装置的机头结构 WO2013086665A1 (zh)

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