WO2015013996A1 - 往复锯用双锯片 - Google Patents

往复锯用双锯片 Download PDF

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Publication number
WO2015013996A1
WO2015013996A1 PCT/CN2013/081504 CN2013081504W WO2015013996A1 WO 2015013996 A1 WO2015013996 A1 WO 2015013996A1 CN 2013081504 W CN2013081504 W CN 2013081504W WO 2015013996 A1 WO2015013996 A1 WO 2015013996A1
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WO
WIPO (PCT)
Prior art keywords
saw blade
hole
sliding
saw
sliding hole
Prior art date
Application number
PCT/CN2013/081504
Other languages
English (en)
French (fr)
Inventor
黄建初
吴承烨
王科威
褚坤元
黄亮
Original Assignee
铁鎯电动工具有限公司
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Filing date
Publication date
Application filed by 铁鎯电动工具有限公司 filed Critical 铁鎯电动工具有限公司
Publication of WO2015013996A1 publication Critical patent/WO2015013996A1/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
    • B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
    • B23D51/02—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of beds; of guiding arrangements for work-tables or saw carriers; of frames
    • B23D51/025—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of beds; of guiding arrangements for work-tables or saw carriers; of frames of arrangements for guiding the saw blade
    • 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
    • B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
    • B23D49/003—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws having a plurality of saw blades or saw blades having plural cutting zones
    • B23D49/006—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws having a plurality of saw blades or saw blades having plural cutting zones with contiguous, oppositely reciprocating saw blades
    • 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
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/123—Details of saw blade body

Definitions

  • the present invention relates to a saw blade, particularly a double saw blade for use in a reciprocating saw, and belongs to the field of power tools.
  • a double-saw reciprocating saw is easy to work because it does not require support for cutting a workpiece during use, and the cutting operation is smooth and the operation is labor-saving, so that it is popular.
  • the double saw blade used in the chainsaw generally includes a first saw blade and a second saw blade disposed in parallel with each other, and guides the first saw blade and the second saw blade to reciprocate opposite to each other by the limit guiding structure.
  • the invention patent entitled “102416505A”, entitled “A Double-Action Reciprocating Saw Blade” discloses a double saw blade of the following structure, comprising two single saw blades, one of which is sawed by a single saw blade
  • the front end of the body has a convex mechanism
  • the front end of the saw body of the other single saw blade has a through groove
  • the two single saw blades are matched by the convex mechanism and the through groove, and can be used as a relative motion.
  • the invention patent entitled “10311 1684A”, entitled “A Double Saw Blade Structure for Chainsaw” discloses a double saw blade having the following structure, comprising a first drive mechanism and a first drive mechanism respectively connected to the chainsaw a first driving blade and a second saw blade disposed in parallel with each other, the first saw blade is provided with a sliding hole, the sidewall of the sliding hole is a sloped surface, and the sliding hole is located on the outer side surface of the first saw blade The opening is larger than the opening of the sliding hole on the inner side of the first saw blade, the length of the sliding hole is matched with the stroke of the second saw blade; the second saw blade is slidably received in the second saw blade A slider in the sliding hole, the slider is configured as a circular table corresponding to the size of the sliding hole, and the height of the sliding block is slightly smaller than the depth of the sliding hole.
  • the limit guiding structure on the existing double saw blade usually comprises a protrusion and a sliding groove, and the protrusion and the sliding groove are respectively provided on two saw blades, wherein the protrusion is generally a rivet or a slider, a chute
  • the protrusion is generally a rivet or a slider, a chute
  • the protrusion can only move along the chute, thereby functioning as a limit guide.
  • the reciprocating motion of the two saw blades causes the protrusion and the groove wall of the sliding groove to continuously rub. Since the protrusion is fixed on the saw blade, the friction will increase the wear, resulting in the protrusion and the groove.
  • a double saw blade for a reciprocating saw comprising a first saw blade and a second saw blade, the first saw blade and the second saw blade
  • the sheet is connected by a limit guiding mechanism
  • the limiting guiding mechanism includes a sliding member, a first sliding hole disposed on the first saw blade, and a second sliding hole disposed on the second saw blade
  • the sliding member has a shaft And a first limiting portion and a second limiting portion at the two ends of the shaft portion, the shaft portion passes through the first sliding hole and the second sliding hole, and the first limiting portion is located outside the first saw blade a side surface, the first limiting portion is located on an outer side surface of the second saw blade, and the shaft portion is in the first sliding hole and the second sliding hole during the reciprocating movement of the first saw blade and the second saw blade opposite to each other Rolling and sliding.
  • first sliding hole includes a first guiding hole and a first mounting hole at an end of the first guiding hole
  • second sliding hole includes a second guiding hole and a second guiding hole end a second mounting hole of the portion, the first limiting portion and the second limiting portion of the sliding member are freely passable through the first mounting hole and the second mounting hole, the shaft portion of the sliding member is on the first saw blade and The second saw blade slides in the first guide hole and the second guide hole during the reciprocating movement opposite to each other.
  • the outer surface of the first saw blade is provided with a first limiting slot spaced apart from the first mounting hole by a predetermined distance, and the first guiding sliding hole extends into the first limiting slot, the second saw a second limiting slot is connected to the second mounting hole, and the second guiding slot extends into the second limiting slot, and the first limiting portion can roll in the first limiting slot The second limiting portion can roll and slide in the second limiting slot.
  • the first limiting portion and the second limiting portion are both annular bodies, and the first mounting hole and the second mounting hole are both circular holes, the first limiting slot and the second limiting slot
  • the grooves are all waist grooves.
  • the length of the shaft portion is greater than the sum of the hole depths of the first guide hole and the second guide hole. Further, the shaft portion, the first limiting portion and the second limiting portion of the sliding member are integrally formed or connected in a split manner.
  • the double saw blade for a reciprocating saw proposed by the present invention changes the limit guiding structure of the existing double saw blade, and replaces the existing convex structure (slider, rivet or pin) with a sliding member, and the sliding member is first
  • the saw blade and the second saw blade slide in the first sliding hole and the second sliding hole during the reciprocating movement opposite to each other, that is, the friction generated between the sliding member and the first sliding hole and the second sliding hole is Rolling friction, usually, the resistance of rolling friction is only 1/40 to 1/60 of the sliding frictional resistance, which greatly reduces the friction and wear on the sliding parts and the double saw blade, and prolongs the service life of the double saw blade;
  • the frictional wear is greatly reduced, so that the matching precision between the sliding member and the first sliding hole and the second sliding hole is not reduced by friction and wear for a long time, thereby ensuring the stability of the cutting operation of the double saw blade. Improve the quality of the cut.
  • the first limiting portion and the second limiting portion are disposed on the sliding member of the present invention, the first limiting portion is located on an outer side surface of the first saw blade, and the first limiting portion is located on an outer side surface of the second saw blade, in practice Cutting work, the first book
  • the limiting portion and the second limiting portion respectively limit the first saw blade and the second saw blade to maintain a stable gap between the first saw blade and the second saw blade, thereby obtaining an ideal workpiece to be cut. Cut the seams.
  • FIG. 1 is a schematic structural view of a first saw blade according to a preferred embodiment of the present invention
  • FIG. 2 is a cross-sectional view taken along line AA of FIG. 1
  • Figure 4 is a cross-sectional view taken along line BB of Figure 1
  • Figure 5 is a schematic view showing the structure of a sliding member in a preferred embodiment of the present invention
  • Figure 6 is a first saw blade and a second saw in a preferred embodiment of the present invention.
  • Figure 7 is a cross-sectional view of the assembly of the sheet and the slider;
  • Figure 7 is a cross-sectional view taken along line CC of Figure 6;
  • Figure 8 is a perspective view showing the assembled structure of the first saw blade, the second saw blade and the slider in a preferred embodiment of the present invention.
  • the present invention provides a double saw blade for a reciprocating saw, comprising a first saw blade and a second saw blade.
  • the first saw blade and the second saw blade are connected by a limit guiding mechanism, and the limit guiding mechanism includes sliding a first sliding hole disposed on the first saw blade and a second sliding hole disposed on the second saw blade, the sliding member has a shaft portion and a first limiting portion and a second limiting portion at both ends of the shaft portion
  • the shaft portion passes through the first sliding hole and the second sliding hole, and the first limiting portion is located at the first
  • An outer side surface of a saw blade, the first limiting portion is located on an outer side surface of the second saw blade, and the shaft portion is in the first sliding hole and the second sliding hole during the reciprocating movement of the first saw blade and the second saw blade opposite to each other Scrolling inside.
  • the limit guiding structure on the double saw blade usually comprises a protrusion and a sliding groove, and the protrusion and the sliding groove are respectively disposed on the two saw blades. Since the protrusion is fixedly arranged, only sliding friction can be generated between the protrusion and the sliding groove.
  • the saw blade has a large wear
  • the sliding member is used to replace the existing convex structure (slider, rivet or pin), and the sliding member is opposite to each other in the first saw blade and the second saw blade
  • the first sliding hole and the second sliding hole are slidably slid, that is, the friction generated between the sliding member and the first sliding hole and the second sliding hole is rolling friction, and generally, rolling friction
  • the resistance is only 1/40 to 1/60 of the sliding frictional resistance, which greatly reduces the friction and wear on the sliding parts and the double saw blade, and prolongs the service life of the double saw blade.
  • a double saw blade for a reciprocating saw includes a first saw blade 1 and a second saw blade 2, and the first saw blade 1 and the second saw blade 2 are connected by a limit guiding mechanism, and the limit guiding mechanism
  • the sliding member 3 includes a first sliding hole 11 disposed on the first saw blade 1 and a second sliding hole 21 disposed on the second saw blade 2.
  • the sliding member 3 has a shaft portion 30 and a second portion at both ends of the shaft portion 30. a limiting portion 31 and a second limiting portion 32, the shaft portion 30 passes through the first sliding hole 11 and the second sliding hole 21, and the first limiting portion 31 is located on the outer side of the first saw blade 1, the first limit The portion 31 is located on the outer side surface of the second saw blade 2, and the shaft portion 30 rolls and slides in the first sliding hole 11 and the second sliding hole 21 during the reciprocal movement of the first saw blade 1 and the second saw blade 2 opposite to each other.
  • the first sliding hole 11 includes a first guiding hole 110 and an end portion of the first guiding hole 110.
  • the first mounting hole 111 includes a second guiding hole 210 and a second mounting hole 211 at the end of the second guiding hole 210.
  • the first limiting portion 31 and the second limit of the sliding member 3 The portion 32 can freely pass through the first fitting hole 111 and the second fitting hole 211, and the shaft portion 30 of the slider 3 is in the first guide hole during the reciprocating movement of the first saw blade 1 and the second saw blade 2 opposite to each other 110 and the second guide sliding hole 210 roll and slide.
  • the first guide slot 1 is provided with a first limiting slot 112 spaced apart from the first mounting hole 111 by a predetermined distance.
  • the first guiding slot 110 extends into the first limiting slot 112.
  • the second limiting slot 212 is connected to the second mounting hole 211, and the second guiding slot 210 extends into the second limiting slot 212.
  • the first limiting portion 31 is said to be
  • the first limiting portion 32 can roll and slide in the second limiting slot 212.
  • the assembly process is as follows: First, the sliding member 3 is assembled on the first saw blade 1, as follows: The second limiting portion 32 passes through the first mounting hole of the first saw blade 1, moves the sliding member 3 to the first guiding sliding hole 110, and then moves the sliding member 3 toward the second limiting portion 32 to make the first The limiting portion 31 is embedded in the first limiting slot 112; the second saw blade 2 is assembled on the sliding member 3, as follows: The second saw blade 2 is superposed on the first saw blade 1, and the sliding member 3 is The second limiting portion 32 passes through the second mounting hole of the second saw blade 2, and since the length of the shaft portion 30 of the sliding member 3 is greater than the sum of the hole depths of the first guiding hole 110 and the second guiding hole 210, The rearward movement of the two saw blades 2 causes the shaft portion 30 of the slider 3 to move relative to the second guide hole 210.
  • the second limiting slot 212 is connected to the second mounting hole 211, the second limiting portion 32 slides.
  • the second limit groove 212 is inserted into the assembly of the first saw blade 1, the second saw blade 2 and the slider 3.
  • the assembled double saw blade is mounted on the reciprocating saw, the first drive mechanism (not shown) of the reciprocating saw drives the first saw blade 1, and the second drive mechanism (not shown) drives the second saw Sheet 2, the first saw blade 1 and the second saw blade 2 move in opposite directions, but the cutting speed is the same as the cutting force, so the resistance generated during cutting can cancel each other, no recoil, smooth cutting process, comfortable operation, cutting efficiency Can exceed 40% of current single saw blades.
  • the length of the first limiting slot 112 on the first saw blade 1 defines the effective travel of the dual saw blade.
  • the first limiting portion 31 and the second limiting portion 32 are both annular bodies, and the first mounting hole 111 and the second mounting hole 211 are both circular holes, and the diameter of the circular hole is slightly larger than the ring.
  • the diameter of the body is such that the first limiting portion 31 and the second limiting portion 32 pass through; the first limiting slot 112 and the second limiting slot 212 are both waist grooves, and the width of the waist groove is slightly larger than the torus The diameter is slid to facilitate the rolling of the first limiting portion 31 and the second limiting portion 32.
  • two sets of limit guiding mechanisms are arranged on the double saw blade, which can improve the stability of the double saw blade.
  • the number of limit guiding mechanisms can be appropriately increased.
  • the sliding member of the present invention can also adopt a split structure.
  • first limiting portion and the shaft portion are integrally formed, and the second limiting portion can be fixed to one end of the shaft portion by mechanical connection, so that When assembling the double saw blade, the first assembly hole and the second assembly hole may be omitted on the saw blade, and the shaft portion of the sliding member directly passes through the first guide hole and the second guide hole, and then at the shaft end
  • the sliding of the sliding member can also be achieved.
  • Embodiments of the invention are applied to hand-held power tools, particularly reciprocating saws or multi-function chainsaws.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)

Abstract

一种往复锯用双锯片，包括第一锯片（1）和第二锯片（2），第一锯片（1）和第二锯片（2）通过限位导向机构连接，限位导向机构包括滑动件（3）、设于第一锯片（1）上的第一滑孔（11）和设于第二锯片（2）上的第二滑孔（21）,滑动件（3）具有轴部（30）和位于轴部（30）两端的第一限位部（31）与第二限位部（32）,轴部（30）穿过第一滑孔（11）与第二滑孔（21）,第一限位部（31）位于第一锯片（1）的外侧面，第二限位部（32）位于第二锯片（2）的外侧面，轴部（30）在第一锯片（1）和第二锯片（2）彼此相反地往复运动过程中于第一滑孔（11）与第二滑孔（21）内滚动滑行。该往复锯用双锯片使得摩擦磨损减小，能够保证双锯片切割运动的稳定性，提高切割质量。

Description

说 明 书
往复锯用双锯片
【技术领域】 本发明涉及一种锯片， 尤其是应用于往复锯的双锯片， 属于电动工具领域。 【背景技术】 双锯片往复锯由于在使用时不需要对待切割工件进行支持即可方便地工 作， 并且切割动作平稳， 操作省力， 因而广受欢迎。 目前电锯所用的双锯片通 常包括相互平行设置的第一锯片和第二锯片， 并且通过限位导向结构引导第一 锯片和第二锯片彼此相反的往复运动。 例如， 公开号为" 102416505A"、 名称为"一种双动往复锯片"的发明专利中 公开了如下结构的双锯片， 包括两根单锯片， 其中一根所述单锯片的锯体前端 带有凸起机构， 另一根所述单锯片的锯体前端带有通槽， 两根所述单锯片通过 所述凸起机构和所述通槽配合在一起， 可作相对运动。 又如， 公开号为" 10311 1684A"、 名称为 "一种电锯用双锯片结构"的发明专 利中公开了如下结构的双锯片， ， 包括分别连接电锯的第一驱动机构和第二驱 动机构且相互平行设置的第一锯片和第二锯片， 所述第一锯片上设有滑孔， 该 滑孔的侧壁为斜面， 且滑孔位于第一锯片外侧面上的开口大于滑孔位于第一锯 片内侧面上的开口， 该滑孔的长度与所述第二锯片的行程相适配； 所述第二锯 片上设有能滑动地容置在所述滑孔内的滑块， 所述滑块的结构为与滑孔大小相 适配的圆台， 并且所述滑块的高度稍小于所述滑孔的深度。 由上述公开文献可知： 现有双锯片上的限位导向结构通常包括凸起和滑槽， 凸起和滑槽分别设置两片锯片上， 其中凸起一般为铆钉或者滑块， 滑槽的形状 与凸起相配合， 双锯片组装后， 凸起只能沿着滑槽运动， 从而起到限位导向作 用。 切割工作中， 两片锯片的往复运动使得凸起与滑槽的槽壁不断摩擦， 由于 凸起固定于锯片上， 这种摩擦带来的磨损会加大， 导致凸起与滑槽之间达不到 原先的配合精度， 出现锯片上下抖动的情况， 影响双锯片的使用寿命以及切割 质量。 【发明内容】 本发明提出一种往复锯用双锯片， 能保证双锯片切割运动的稳定性， 并延 长其使用寿命。 为解决上述技术问题， 本发明采用如下技术方案： 一种往复锯用双锯片， 包括第一锯片和第二锯片， 所述第一锯片和第二锯 说
片通过限位导向机构连接， 所述限位导向机构包括滑动件、 设于第一锯片上的 第一滑孔和设于第二锯片上的第二滑孔， 所述滑动件具有轴部和位于轴部两端 的第一限位部与第二限位部， 所述轴部穿书过第一滑孔与第二滑孔， 所述第一限 位部位于第一锯片的外侧面， 所述第一限位部位于第二锯片的外侧面， 所述轴 部在第一锯片和第二锯片彼此相反地往复运动过程中于第一滑孔与第二滑孔内 滚动滑行。 进一步的， 所述第一滑孔包括第一导滑孔和位于第一导滑孔端部的第一装 配孔， 所述第二滑孔包括第二导滑孔和位于第二导滑孔端部的第二装配孔， 所 述滑动件的第一限位部与第二限位部均可自由通过第一装配孔与第二装配孔， 所述滑动件的轴部在第一锯片和第二锯片彼此相反地往复运动过程中于第一导 滑孔与第二导滑孔内滚动滑行。 进一步的， 所述第一锯片的外侧面设有与第一装配孔间隔预定距离的第一 限位槽， 所述第一导滑孔延伸至第一限位槽内， 所述第二锯片的外侧面设有与 第二装配孔连接的第二限位槽， 所述第二导滑孔延伸至第二限位槽内， 第一限 位部可在第一限位槽中滚动滑行， 第二限位部可在第二限位槽中滚动滑行。 进一步的， 所述第一限位部与第二限位部均为圆环体， 所述第一装配孔与 第二装配孔均为圆孔， 所述第一限位槽与第二限位槽均为腰形槽。 进一步的， 所述轴部的长度大于所述第一导滑孔与第二导滑孔的孔深之和。 进一步的， 所述滑动件的轴部、 第一限位部以及第二限位部三者一体成型 或者分体式连接。 本发明的有益效果： 1、 本发明提出的往复锯用双锯片改变了现有双锯片的限位导向结构， 采用 滑动件代替现有的凸起结构 （滑块、 铆钉或销钉）， 并且滑动件在第一锯片和第 二锯片彼此相反地往复运动过程中于第一滑孔与第二滑孔内滚动滑行， 也就是 说， 滑动件与第一滑孔和第二滑孔之间产生的摩擦为滚动摩擦， 通常情况下， 滚动摩擦的阻力只有滑动摩擦阻力的 1/40到 1/60， 这样就大大降低了滑动件与 双锯片上产生的摩擦磨损， 延长双锯片的使用寿命； 另外， 由于摩擦磨损的大 幅减小， 使得滑动件与第一滑孔和第二滑孔之间的配合精度在较长时间内不因 摩擦磨损而被降低， 保证双锯片切割运动的稳定性， 提高切割质量。
说
2、 本发明滑动件上设置第一限位部与第二限位部， 第一限位部位于第一锯 片的外侧面， 第一限位部位于第二锯片的外侧面， 在实际的切割工作中， 第一 书
限位部与第二限位部分别对第一锯片与第二锯片进行限位， 以保持第一锯片与 第二锯片之间稳定的间隙带， 从而使被切割工件获得理想的切缝。
3、 由于滑动件与双锯片之间的摩擦阻力减小， 一定程度上减小了双锯片往 复运动时的阻力， 相比现有技术中的双锯片， 本发明的双锯片在同样的驱动力 条件下， 能获得更大的往复动力， 切割效率提高。 本发明的这些特点和优点将会在下面的具体实施方式、 附图中详细的揭露。
【附图说明】 下面结合附图对本发明做进一步的说明： 图 1为本发明优选实施例中第一锯片的结构示意图； 图 2为图 1的 A-A剖视图； 图 3为本发明优选实施例中第二锯片的结构示意图； 图 4为图 1的 B-B剖视图； 图 5为本发明优选实施例中滑动件的结构示意图； 图 6为本发明优选实施例中第一锯片、 第二锯片与滑动件的装配后的侧面 结构示意图； 图 7为图 6的 C-C剖视图; 图 8为本发明优选实施例中第一锯片、 第二锯片与滑动件的装配后的立体 结构示意图。
【具体实施方式】 本发明提出一种往复锯用双锯片， 包括第一锯片和第二锯片， 第一锯片和 第二锯片通过限位导向机构连接， 限位导向机构包括滑动件、 设于第一锯片上 的第一滑孔和设于第二锯片上的第二滑孔， 滑动件具有轴部和位于轴部两端的 第一限位部与第二限位部， 轴部穿过第一滑孔与第二滑孔， 第一限位部位于第 说
一锯片的外侧面， 第一限位部位于第二锯片的外侧面， 轴部在第一锯片和第二 锯片彼此相反地往复运动过程中于第一滑孔与第二滑孔内滚动滑行。
书
目前双锯片上的限位导向结构通常包括凸起和滑槽， 凸起和滑槽分别设置 两片锯片上， 由于凸起为固定设置， 凸起与滑槽之间只能产生滑动摩擦， 对锯 片产生较大磨损， 而本发明的方案中采用滑动件代替现有的凸起结构 （滑块、 铆钉或销钉）， 并且滑动件在第一锯片和第二锯片彼此相反地往复运动过程中于 第一滑孔与第二滑孔内滚动滑行， 也就是说， 滑动件与第一滑孔和第二滑孔之 间产生的摩擦为滚动摩擦， 通常情况下， 滚动摩擦的阻力只有滑动摩擦阻力的 1/40到 1/60， 这样就大大降低了滑动件与双锯片上产生的摩擦磨损， 延长双锯 片的使用寿命。 下面结合本发明实施例的附图对本发明实施例的技术方案进行解释和说 明， 但下述实施例仅仅为本发明的优选实施例， 并非全部。 基于实施方式中的 实施例， 本领域技术人员在没有做出创造性劳动的前提下所获得其他实施例， 都属于本发明的保护范围。 参照图 1-5， 一种往复锯用双锯片， 包括第一锯片 1和第二锯片 2， 第一锯 片 1和第二锯片 2通过限位导向机构连接， 限位导向机构包括滑动件 3、设于第 一锯片 1上的第一滑孔 11和设于第二锯片 2上的第二滑孔 21，滑动件 3具有轴 部 30和位于轴部 30两端的第一限位部 31与第二限位部 32， 轴部 30穿过第一 滑孔 11与第二滑孔 21， 第一限位部 31位于第一锯片 1的外侧面， 第一限位部 31位于第二锯片 2的外侧面，轴部 30在第一锯片 1和第二锯片 2彼此相反地往 复运动过程中于第一滑孔 11与第二滑孔 21内滚动滑行。 较优的是， 第一滑孔 11包括第一导滑孔 110和位于第一导滑孔 110端部的 第一装配孔 111， 第二滑孔 21包括第二导滑孔 210和位于第二导滑孔 210端部 的第二装配孔 211，滑动件 3的第一限位部 31与第二限位部 32均可自由通过第 一装配孔 111与第二装配孔 211，滑动件 3的轴部 30在第一锯片 1和第二锯片 2 彼此相反地往复运动过程中于第一导滑孔 110与第二导滑孔 210内滚动滑行。 进一歩优化的是： 第一锯片 1 的外侧面设有与第一装配孔 111 间隔预定距 离的第一限位槽 112， 第一导滑孔 110延伸至第一限位槽 112内， 第二锯片 2的 外侧面设有与第二装配孔 211连接的第二限位槽 212，第二导滑孔 210延伸至第 二限位槽 212内， 第一限位部 31说可在第一限位槽 112中滚动滑行， 第二限位部 32可在第二限位槽 212中滚动滑行。 需要说明的是： 第一锯片 1与第二锯片书 2组装后， 第一锯片 1上朝向第二 锯片 2的侧面为内侧面， 第一锯片 1上背离第二锯片 2的侧面为外侧面， 第二 锯片 2上朝向第一锯片 1的侧面为内侧面， 第二锯片 2上背离第一锯片 1的侧 面为外侧面。 参照图 6-8， 根据上述优化方案， 以滑动件 3—体成型结构为例， 装配过程 如下： 先将滑动件 3组装于第一锯片 1上， 具体如下： 只将滑动件 3的第二限 位部 32穿过第一锯片 1的第一安装孔， 再将滑动件 3移动至第一导滑孔 110， 然后将滑动件 3向第二限位部 32方向移动， 使第一限位部 31嵌入第一限位槽 112中； 再将第二锯片 2组装于滑动件 3上， 具体如下： 将第二锯片 2叠加于第一 锯片 1上， 滑动件 3的第二限位部 32穿过第二锯片 2的第二安装孔， 由于滑动 件 3的轴部 30长度大于第一导滑孔 110与第二导滑孔 210的孔深之和， 故将第 二锯片 2向后移动可使滑动件 3的轴部 30相对地运动到第二导滑孔 210， 由于 第二限位槽 212与第二装配孔 211连接，故第二限位部 32滑入第二限位槽 212， 完成第一锯片 1、 第二锯片 2与滑动件 3的装配。 将上述组装完成的双锯片安装于往复锯上， 往复锯的第一驱动机构 （图中 未示出） 驱动第一锯片 1， 第二驱动机构 （图中未示出）驱动第二锯片 2， 第一 锯片 1与第二锯片 2的运动方向相反， 但切割速度与切割力相同， 因此切割时 产生的阻力可以互相抵消， 无反冲力， 切割过程平稳， 操作舒适， 切割效率能 超过目前单锯片的 40% 以上。 实际的工作中， 第一锯片 1上的第一限位槽 112 的长度限定了双锯片的有效行程。 为方便装配， 本实施例中第一限位部 31与第二限位部 32均为圆环体， 第 一装配孔 111与第二装配孔 211均为圆孔， 圆孔直径略大于圆环体直径， 以便于 第一限位部 31与第二限位部 32穿过； 第一限位槽 112与第二限位槽 212均为 腰形槽， 腰形槽的宽度略大于圆环体直径， 以便于第一限位部 31与第二限位部 32的滚动滑行。 为了使双锯片的切割运动更加稳定， 本实施例在双锯片上设置了两组限位 导向机构， 可以提高双锯片的稳定性。 但是根据双锯片的长度， 可以适当的增 加限位导向机构的数量。 说 另外， 本发明的滑动件也可以采用分体结构， 比如， 第一限位部与轴部是 一体结构， 而第二限位部可以通过机械连书接方式固定在轴部一端， 这样， 在组 装双锯片时， 可以在锯片上省去第一装配孔和第二装配孔， 滑动件的轴部直接 穿过第一导滑孔和第二导滑孔， 再在轴部端有固定第二限位部， 同样可以实现 滑动件的滚动滑行。 本发明实施例应用于手持式电动工具， 尤其是往复锯或者多功能电锯上。 通过上述实施例， 本发明的目的已经被完全有效的达到了。 熟悉该项技艺 的人士应该明白本发明包括但不限于附图和上面具体实施方式中描述的内容。 任何不偏离本发明的功能和结构原理的修改都将包括在权利要求书的范围中。

Claims

权 利 要 求 书
1、 一种往复锯用双锯片， 包括第一锯片和第二锯片， 所述第一锯片和第二 锯片通过限位导向机构连接， 其特征在于： 所述限位导向机构包括滑动件、 设 于第一锯片上的第一滑孔和设于第二锯片上的第二滑孔， 所述滑动件具有轴部 和位于轴部两端的第一限位部与第二限位部， 所述轴部穿过第一滑孔与第二滑 孔， 所述第一限位部位于第一锯片的外侧面， 所述第一限位部位于第二锯片的 外侧面， 所述轴部在第一锯片和第二锯片彼此相反地往复运动过程中于第一滑 孔与第二滑孔内滚动滑行。
2、 如权利要求 1所述的一种往复锯用双锯片， 其特征在于： 所述第一滑孔 包括第一导滑孔和位于第一导滑孔端部的第一装配孔， 所述第二滑孔包括第二 导滑孔和位于第二导滑孔端部的第二装配孔， 所述滑动件的第一限位部与第二 限位部均可自由通过第一装配孔与第二装配孔， 所述滑动件的轴部在第一锯片 和第二锯片彼此相反地往复运动过程中于第一导滑孔与第二导滑孔内滚动滑 行。
3、 如权利要求 2所述的一种往复锯用双锯片， 其特征在于： 所述第一锯片 的外侧面设有与第一装配孔间隔预定距离的第一限位槽， 所述第一导滑孔延伸 至第一限位槽内， 所述第二锯片的外侧面设有与第二装配孔连接的第二限位槽， 所述第二导滑孔延伸至第二限位槽内， 第一限位部可在第一限位槽中滚动滑行， 第二限位部可在第二限位槽中滚动滑行。
4、 如权利要求 3所述的一种往复锯用双锯片， 其特征在于： 所述第一限位 部与第二限位部均为圆环体， 所述第一装配孔与第二装配孔均为圆孔， 所述第 一限位槽与第二限位槽均为腰形槽。
5、 如权利要求 2或 3或 4所述的一种往复锯用双锯片， 其特征在于： 所述 轴部的长度大于所述第一导滑孔与第二导滑孔的孔深之和。
6、 如权利要求 1或 2或 3或 4所述的一种往复锯用双锯片， 其特征在于： 所述滑动件的轴部、第一限位部以及第二限位部三者一体成型或者分体式连接。
PCT/CN2013/081504 2013-08-02 2013-08-15 往复锯用双锯片 WO2015013996A1 (zh)

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