WO2019210743A1 - 一种往复锯锯片安装装置及往复锯 - Google Patents

一种往复锯锯片安装装置及往复锯 Download PDF

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Publication number
WO2019210743A1
WO2019210743A1 PCT/CN2019/078066 CN2019078066W WO2019210743A1 WO 2019210743 A1 WO2019210743 A1 WO 2019210743A1 CN 2019078066 W CN2019078066 W CN 2019078066W WO 2019210743 A1 WO2019210743 A1 WO 2019210743A1
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WO
WIPO (PCT)
Prior art keywords
clamping
saw blade
mounting device
reciprocating saw
blade mounting
Prior art date
Application number
PCT/CN2019/078066
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English (en)
French (fr)
Inventor
周洋
Original Assignee
南京德朔实业有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 南京德朔实业有限公司 filed Critical 南京德朔实业有限公司
Priority to EP19797027.0A priority Critical patent/EP3778085B1/en
Publication of WO2019210743A1 publication Critical patent/WO2019210743A1/zh
Priority to US17/084,856 priority patent/US11504782B2/en

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    • 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
    • B23D51/08—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 devices for mounting straight saw blades or other tools
    • B23D51/10—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 devices for mounting straight saw blades or other tools for hand-held or hand-operated devices

Definitions

  • the present disclosure relates to the field of power tools, and in particular to a reciprocating saw blade mounting device and a reciprocating saw including the same.
  • An electric reciprocating saw is a power tool that is sawed by a reciprocating saw blade.
  • the existing reciprocating saw usually comprises a reciprocating reciprocating rod and a saw blade connected to the reciprocating rod, and the reciprocating motion of the reciprocating rod is driven by the motor to drive the saw blade to reciprocate to realize cutting.
  • Electric reciprocating saws are used to cut sheet metal, pipe, profile or cut obliques on steel pipes, as well as to cut cables or other non-metallic materials. It needs to be replaced when the saw blade is worn. At present, there are many structures of the reciprocating saw blade mounting device, but most of them must be operated by both hands when installing the saw blade, which is not convenient for the user.
  • the present disclosure employs the following technical solutions:
  • a reciprocating saw blade mounting device comprising:
  • the front end of the reciprocating rod is axially disposed with a clamping cavity for clamping the clamping end of the saw blade;
  • a clamping mechanism comprising a clamping member and a positioning member disposed diametrically opposite to the clamping cavity, the clamping member being movable in a radial direction such that the reciprocating saw blade mounting device is in the clamp Switching between a gripping state in which the holding end is clamped in the clamping cavity and a release state in the clamping cavity;
  • An ejecting mechanism is disposed in the clamping cavity, the ejecting mechanism comprising a pressing block and a first elastic member;
  • the pressure piece When in the released state, the pressure piece is elastically pressed between the clamping member and the positioning member by the first elastic member, such that between the clamping member and the positioning member The spacing is greater than or equal to the thickness of the clamping end;
  • the pressure block When in the clamped state, the pressure block is pressed away from the clamping member and the positioning member by the clamping end, and compresses the first elastic member.
  • the pressing block includes a limiting portion and a convex portion in a direction away from the first elastic member.
  • the protrusion protrudes between the clamping member and the positioning member, and the limiting portion abuts the side wall of the clamping member and/or the positioning member.
  • the pressing block has an L shape, and in the releasing state, an inner end of the clamping member is aligned with an inner wall surface of a sidewall of the clamping cavity, and a sidewall of the positioning member and the limiting end The position is abutted.
  • the eject mechanism is disposed at a middle portion of the clamping cavity.
  • the clamping mechanism further includes a screw sleeve and a torsion spring, the sleeve is rotatably sleeved on the reciprocating rod, the clamping member is a locking pin, and the positioning member is a limiting pin.
  • the locking pin and the limiting pin are oppositely disposed on the side wall of the clamping cavity, and the inner wall of the rotating sleeve is provided with a limiting slot that cooperates with the outer end of the limiting pin and An adjusting groove of the outer end of the locking pin, the limiting groove is curved and coaxial with the sleeve, and the adjusting groove is provided with a clamping position, a releasing position and a clamping position and a smooth curved surface between the release positions, the clamping position being closer to the axis of the sleeve than the release position, the torsion spring providing a force to bring the clamping position into proximity with the locking pin.
  • the clamping mechanism further includes a bushing sleeved between the sleeve and the reciprocating rod, and the clamping member and the positioning member are respectively disposed on the bushing in a radial direction .
  • the clamping mechanism further includes a rear cover sleeved on the reciprocating rod, the rear cover is located at a rear end of the sleeve, and the torsion spring is at least partially received by the rear cover, the twist Two legs of the spring are respectively inserted into the clamping cavity and the sleeve, and the bushing is provided with a limiting structure at the front end of the sleeve.
  • a second elastic member is disposed between the sidewall of the clamping cavity and the locking pin, and the second elastic member provides a force to radially move the locking pin away from the limiting pin.
  • one of the clamping end and the locking pin is provided with a locking groove or a locking hole, and the other is provided with a locking protrusion that cooperates with the locking groove or the locking hole, the reciprocating The locking projection fits in the locking groove or the locking hole when the saw blade mounting device is in the clamping state.
  • a reciprocating saw comprising a saw blade and a reciprocating saw blade mounting device according to any of the above.
  • the reciprocating saw blade mounting device and the reciprocating saw provided by the present disclosure, when the saw blade is not installed, the pressing block is clamped between the clamping member and the positioning member, and the pressing block is such that the spacing between the clamping member and the positioning member is greater than or Equal to the thickness of the clamping end of the saw blade.
  • the saw blade needs to be installed, insert the saw blade with one hand so that the clamping end abuts between the clamping member, the positioning member and the pressing block, and then continues to insert the saw blade to withdraw the pressing block from the clamping piece. It can be placed between the holding part and the positioning piece, and the saw blade can be installed with one hand, which is convenient to install.
  • the clamping cavity releases the clamping of the clamping end, and the pressing block can be ejected into the clamping cavity under the action of the elastic member, and the disassembly is very convenient.
  • FIG. 1 is a schematic structural view of a reciprocating saw provided by an embodiment of the present disclosure
  • FIG. 2 is an exploded view of a reciprocating saw blade mounting device provided by an embodiment of the present disclosure
  • FIG. 3 is a side view of the reciprocating saw blade mounting device provided by the embodiment of the present disclosure in a clamped state
  • Figure 4 is a cross-sectional view taken along line A-A of Figure 3;
  • Figure 5 is a front elevational view of the reciprocating saw blade mounting device provided by the embodiment of the present disclosure in a clamped state;
  • Figure 6 is a cross-sectional view taken along line B-B of Figure 5;
  • Figure 7 is a cross-sectional view taken along line E-E of Figure 5;
  • Figure 8 is a side elevational view of the reciprocating saw blade mounting device of the present disclosure when in a released state
  • Figure 9 is a cross-sectional view taken along line C-C of Figure 8.
  • Figure 10 is a front elevational view of the reciprocating saw blade mounting device provided in a release state according to an embodiment of the present disclosure
  • Figure 11 is a cross-sectional view taken along line D-D of Figure 10.
  • Figure 12 is a partial enlarged view taken along line A of Figure 11 .
  • clamping mechanism 51, lock pin; 52, limit pin; 53, screw sleeve; 54, torsion spring; 55, bushing; 56, rear cover; 57, first circlip; 531, limit slot; 532, adjusting groove; 533, clamping position; 534, release position; 561, receiving cavity; 541, first leg; 542, second leg;
  • Ejecting mechanism 61, pressing block; 62, first elastic member; 611, convex portion; 612, limiting portion;
  • the present embodiment provides a reciprocating saw, as shown in FIG. 1, which includes a reciprocating saw blade mounting device 2 and a saw blade 3 that can be clamped on or off the reciprocating saw blade mounting device 2, reciprocating
  • the saw blade mounting device 2 is coupled to a power mechanism within the reciprocating saw body 1.
  • the words “front”, “back”, “left”, “right” and the like indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and should not be construed as being related to the present disclosure.
  • the limitation is that the end near the reciprocating saw body 1 is the rear end, and the end away from the reciprocating saw body 1 is the front end.
  • the rear end of the saw blade 3 is a grip end 31, and the reciprocating saw blade mounting device 2 includes a reciprocating rod 4, a clamping mechanism 5, and an eject mechanism 6.
  • the front end of the reciprocating rod 4 is axially provided with a clamping chamber 41 for accommodating the clamping end 31.
  • the clamping mechanism 5 is configured to enable the reciprocating saw blade mounting device 2 to be clamped in the clamping cavity 41 at the clamping end 31 as shown in FIGS. 3 to 7 and as shown in FIGS. 8 to 11
  • the illustrated gripping end 31 is displaced from the released state of the clamping chamber 41.
  • the eject mechanism 6 can provide an elastic force for disengaging the grip end 31 from the grip chamber 41, thereby facilitating the disassembly of the saw blade 3.
  • the clamping mechanism 5 includes a clamping member that is disposed on the clamping cavity 41 in a radial direction, and the clamping member is preferably a locking pin 51.
  • the lock pin 51 is bored in the radial direction on the side wall of the clamping cavity 41, and the locking pin 51 is movable in the radial direction of the clamping cavity 41, so that the reciprocating saw blade mounting device 2 is locked at the clamping end 31.
  • the clamping state of the clamping portion 51 in the clamping chamber 41 and the release state of the clamping end 31 from the clamping chamber 41 are switched. It can be understood that in other embodiments, the clamping member can also be replaced with other structures, and the clamping end 31 can be clamped.
  • the locking pin 51 can be driven to move in the radial direction by the following: the clamping mechanism 5 further includes a positioning member, a rotating sleeve 53 and a torsion spring 54 .
  • the positioning member is preferably but not limited.
  • the limit pin 52, the limit pin 52 and the lock pin 51 are disposed on the side wall of the clamping cavity 41 diametrically opposite one another (the diametrically oppositely disposed means the connection between the limit pin 52 and the lock pin 51)
  • the axis of the reciprocating rod 4 is perpendicular, and the sleeve 53 is rotatably sleeved on the reciprocating rod 4.
  • the inner wall of the sleeve 53 is provided with a limiting groove 531 and an adjusting groove 532.
  • the inner wall surface of the limiting groove 531 and the limiting pin 52 are provided.
  • the outer end surface of the adjusting groove 532 cooperates with the outer end surface of the locking pin 51, and the limiting groove 531 is curved and coaxial with the sleeve 53 (coaxial axis refers to the axis coincidence), please refer to FIG. 4 and FIG.
  • the adjusting groove 532 is provided with a clamping position 533, a releasing position 534 and a smooth curved surface between the clamping position 533 and the releasing position 534.
  • the smooth curved surface is preferably an involute curved surface, and the clamping position 533 is closer to the releasing position 534.
  • the locking pin 51 is movable between the clamping position 533 and the release position 534 when the locking pin 51 is engaged
  • the distance between the locking pin 51 and the limiting pin 52 is the smallest.
  • the torsion spring 54 provides the clamping. The force holding the position 533 close to the lock pin 51.
  • the clamping mechanism 5 further includes a sleeve 53 and a reciprocating rod.
  • the bushing 55 between the four, the locking pin 51 and the limiting pin 52 are radially disposed on the bushing 55 to fix the bushing 55 on the reciprocating rod 4.
  • the clamping mechanism 5 further includes a rear cover 56 sleeved on the reciprocating rod 4, and the rear cover 56 is located at the rear end of the sleeve 53
  • the torsion spring 54 is at least partially received in the rear cover 56, and the two legs of the torsion spring 54 are respectively inserted into the sleeve 53 and into the clamping cavity 41.
  • the rear cover 56 is circumferentially disposed with a receiving cavity 561 for receiving one end opening of the torsion spring 54.
  • the torsion spring 54 includes two legs, wherein the first leg 541 is disposed along the axial direction of the spring body thereof, and the second leg 542 is disposed in a direction perpendicular to the axial direction of the spring body.
  • the opening of the first leg 541 penetrating the receiving cavity 561 is inserted into the rear end of the sleeve 53, and the second leg 542 is inserted into the side wall of the receiving cavity 561.
  • the rear cover 56 can be positioned on the reciprocating rod 4 by means of a second snap spring 8 or a shoulder or the like.
  • the sleeve 53 can be axially positioned by the rear cover 56 and a limiting structure disposed on the sleeve 55 and located at the front end of the sleeve 53.
  • the limiting structure is preferably, but not limited to, a first circlip 57, and the first circlip 57 can be mounted in a mounting groove formed in the bushing 55.
  • the eject mechanism 6 is disposed in the clamping cavity 41.
  • the ejecting mechanism 6 includes a pressing block 61 and a first elastic member 62.
  • the pressing block 61 can pass through the first elastic member 62.
  • the first elastic member 62 is movably coupled to the clamping chamber 41.
  • the first elastic member 62 is preferably but not limited to a spring. The rear end of the spring is fixed to the bottom of the clamping chamber 41, and the front end is connected to the pressing block 61. When in the released state, the pressing block 61 is pressed.
  • the first elastic member 62 is elastically pressed between the limiting pin 52 and the locking pin 51 such that the spacing between the limiting pin 52 and the locking pin 51 is greater than or equal to the thickness of the clamping end 31; when in the clamping state The pressure piece 61 is pressed away from the limit pin 52 and the lock pin 51 by the clamp end 31, and compresses the first elastic member 62.
  • the saw blade 3 when the saw blade 3 needs to be mounted, the saw blade 3 is inserted into the saw blade 3 with one hand so that the clamping end 31 abuts between the locking pin 51, the limiting pin 52 and the pressing block 61 and then continues to insert the saw blade 3.
  • the pressing block 61 can be withdrawn between the locking pin 51 and the limiting pin 52, and the saw blade 3 can be installed with one hand, and the installation is convenient.
  • the rotating sleeve 53 is rotated to move the locking pin 51 to the releasing position 534 of the adjusting groove 532, and the locking pin 51 is moved radially outward, and the distance between the locking pin 51 and the limiting pin 52 is increased.
  • the pressing block 61 can be ejected into the clamping cavity 41 by the action of the first elastic member 62, and the disassembly is very convenient.
  • the clamping end 31 is provided with a locking hole 311, and the locking pin 51 has a locking protrusion matched with the locking hole 311, and the reciprocating saw blade mounting device
  • the locking projection fits in the locking hole 311.
  • the locking hole 311 can be interchanged with the position of the locking protrusion, that is, the locking hole 311 is disposed on the locking pin 51, and the locking protrusion is disposed on the clamping end 31. It is also possible to change the above-described locking hole 311 to a locking groove.
  • the pressing block 61 in order to avoid the pressing block 61 passing between the limiting pin 52 and the locking pin 51 after the blade 3 is released, the pressing block 61 is in a direction away from the first elastic member 62.
  • the limiting portion 612 and the protruding portion 611 are included. When the state is released, the protruding portion 611 extends between the locking pin 51 and the limiting pin 52, and the limiting portion 612 abuts against the sidewall of the limiting pin 52.
  • the pressing block 61 has an L shape, that is, one side of the limiting portion 612 is aligned with one side of the convex portion 611, and the other side of the limiting portion 612 protrudes from the convex portion 611, and is released.
  • the inner end of the lock pin 51 is aligned with the inner wall surface of the side wall of the clamp chamber 41, and the side wall of the limit pin 52 abuts against the portion of the limit portion 612 that protrudes from the convex portion 611.
  • inserting the saw blade 3 along the side of the lock pin 51 ensures that the end of the clamp end 31 is accurately abutted against the press block 61, and the operation is more precise.
  • the limiting portion 612 may also abut or only abut the side wall of the locking pin 51 when in the released state.
  • One side of the end of the grip end 31 of the saw blade 3 is usually provided with a guide portion 312 which is disposed along the longitudinal direction of the saw blade 3.
  • the outer wall of the guide portion 312 slides substantially along the inner wall surface of the side wall of the clamping chamber 41 to serve as a mounting guide.
  • the guide portion 312 can be inserted into the chucking chamber only from one side.
  • the ejecting mechanism 6 is disposed in the middle of the clamping cavity 41, and the ejecting mechanism 6 is disposed in the middle of the clamping cavity, which means that the ejecting mechanism 6 can be, but is not limited to, disposed on the central axis of the clamping cavity 41, There may be a certain offset with respect to the central axis of the clamping cavity 41, and it is ensured that there is a gap 9 between the two sides of the ejection mechanism 6 and the inner wall surface of the side wall of the clamping cavity 41 for the insertion of the guiding portion 312.
  • the guide portion 312 is selectively inserted into the clamping cavity from either side of the ejection mechanism 6, thereby improving the use condition of the saw blade 3.
  • a second elastic member 7 is disposed between the locking pin 51 and the side wall of the clamping cavity 41, and the second elastic member 7 provides the locking pin 51 away from the limiting pin 52 in the radial direction. force.
  • the second elastic member 7 is disposed between the outer wall surface of the side wall of the clamping chamber 41 and the lock pin 51.
  • a positioning groove 411 for accommodating the end of the second elastic member 7 may be disposed on the outer wall surface of the side wall of the clamping chamber 41 to prevent the second elastic member 7 from shaking.
  • the second elastic member 7 is preferably, but not limited to, a spring.
  • the pressing block 61 abuts the limit under the action of the first elastic member 62.
  • the pin 52 and the locking pin 51 in particular, the convex portion 611 of the pressing block 61 is clamped between the limiting pin 52 and the locking pin 51, and the limiting portion 612 of the pressing block 61 abuts against the side wall of the limiting pin 52.
  • the outer end of the lock pin 51 is fitted to the release position 534 of the adjustment groove 532.
  • the saw blade 3 is directly inserted into one hand and the clamping end 31 abuts against the front end face of the convex portion 611 of the pressing block 61, and the saw blade 3 is continuously inserted so that the saw blade 3 pushes the pressing block 61 toward the clamping.
  • the direction of the bottom of the cavity 41 moves while compressing the first elastic member 62 until the locking projection fits into the locking hole 311.
  • the mounting of the saw blade 3 is completed, and the locking pin 51 is at the torsion spring 54.
  • the clamping position 533 of the adjusting groove 532 is applied to minimize the distance between the locking pin 51 and the limiting pin 52.
  • the rotating sleeve 53 is rotated such that the outer end of the locking pin 51 moves in a direction close to the releasing position 534 of the adjusting groove 532, the locking pin 51 moves in a direction away from the limiting pin 52, and the second elastic member 7 extends the locking pin.
  • the eject mechanism 6 ejects the saw blade 3 from the holding chamber 41.
  • the present disclosure provides a reciprocating saw blade mounting device and a reciprocating saw.
  • the multi-saw blade mounting device and the reciprocating saw can be used to install the saw blade with one hand, and the operation is convenient.

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

一种往复锯锯片安装装置及往复锯，属于电动工具技术领域。该往复锯锯片安装装置的往复杆（4）的前端轴向设置有夹持腔（41）；夹持机构（5）包括夹持件（51）和定位件（52），夹持件（51）能够沿径向运动，从而使得往复锯锯片安装装置在夹持端（31）被夹持件（51）夹紧于夹持腔（41）中的夹持状态和脱离于夹持腔（41）的释放状态之间转换；弹出机构（6）包括压块（61）和第一弹性件（62），释放状态时，压块（61）抵压于夹持件（51）和定位件（52）之间；当处于夹持状态时，压块（61）被夹持端（31）抵压脱离于夹持件（51）和定位件（52）之间。该往复锯锯片安装装置及往复锯可单手安装锯片，操作方便。

Description

一种往复锯锯片安装装置及往复锯 技术领域
本公开涉及电动工具技术领域，尤其涉及一种往复锯锯片安装装置及包括该往复锯锯片安装装置的往复锯。
背景技术
电动往复锯是一种通过往复运动的锯片进行锯切的电动工具。现有往复锯通常包括可往复运动的往复杆及连接于往复杆上的锯片，通过电机驱动往复杆往复运动，进而带动锯片往复运动，实现切割。
电动往复锯用于锯割金属板材、管材、型材或在钢管上切割斜口，也可切割电缆或其它非金属材料。当锯片磨损后需要更换。目前往复锯片安装装置的结构很多，但在安装锯片时大都必须双手操作，对于用户来说不便捷。
发明内容
本公开的目的在于提出一种锯片易于安装的往复锯锯片安装装置及往复锯。
为达此目的，一方面，本公开采用以下技术方案：
一种往复锯锯片安装装置，包括：
往复杆，所述往复杆的前端轴向设置有用于夹持锯片的夹持端的夹持腔；
夹持机构，包括沿径向相对地设置于所述夹持腔上的夹持件和定位件，所述夹持件能够沿径向运动从而使得所述往复锯锯片安装装置在所述夹持端被所述夹持件夹紧于所述夹持腔中的夹持状态和脱离于所述夹持腔的释放状态之间转换；以及
弹出机构，设置于所述夹持腔内，所述弹出机构包括压块和第一弹性件；
当处于所述释放状态时，所述压块被所述第一弹性件弹性抵压于所述夹持件和所述定位件之间，使得所述夹持件和所述定位件之间的间距大于或等于所述夹持端的厚度；
当处于所述夹持状态时，所述压块被所述夹持端抵压脱离于所述夹持件和所述定位件之间，并压缩所述第一弹性件。
进一步地，所述第一弹性件的两端分别与所述压块和所述夹持腔的腔底连接，所述压块在沿远离所述第一弹性件的方向包括限位部和凸部，所述释放状态时，所述凸部伸入所述夹持件与所述定位件之间，所述限位部抵接所述夹持件和/或所述定位件的侧壁。
进一步地，所述压块呈L形，所述释放状态时，所述夹持件的内端与所述夹持腔的侧壁的内壁面对齐，所述定位件的侧壁与所述限位部抵接。
进一步地，所述弹出机构设置在所述夹持腔的中部。
进一步地，所述夹持机构还包括旋套和扭簧，所述旋套可旋转地套设于所述往复杆上，所述夹持件为锁销，所述定位件为限位销，所述锁销和所述限位销相对地穿设于所述夹持腔的侧壁上，所述旋套的内壁上设置有与所述限位销的外端配合的限位槽以及与所述锁销的外端配合的调节槽，所述限位槽呈弧形且与所述旋套共轴线，所述调节槽上设置有夹持位置、释放位置和位于所述夹持位置和所述释放位置之间的平滑曲面，所述夹持位置较所述释放位置靠近所述旋套的轴线，所述扭簧提供使所述夹持位置与所述锁销靠近的力。
进一步地，所述夹持机构还包括套设于所述旋套与所述往复杆之间的衬套，所述夹持件和所述定位件分别沿径向穿设于所述衬套上。
进一步地，所述夹持机构还包括套设于所述往复杆上的后罩，所述后罩位于所述旋套后端，所述扭簧至少部分容纳于所述后罩，所述扭簧的两个支脚分别插入所述夹持腔内和所述旋套内，所述衬套上设置有位于所述旋套前端的限位结构。
进一步地，所述夹持腔的侧壁与所述锁销之间设置有第二弹性件，所述第二弹性件沿径向提供使所述锁销远离所述限位销的力。
进一步地，所述夹持端与所述锁销中的一个上设置有锁定槽或者锁定孔、另一个上设置有与所述锁定槽或者所述锁定孔相配合的锁定凸起，所述往复锯锯片安装装置处于夹持状态时，所述锁定凸起配合于所述锁定槽或者所述锁定孔中。
另一方面，本公开采用以下技术方案：
一种往复锯，包括锯片和上述任一项所述的往复锯锯片安装装置。
本公开的有益效果如下：
本公开提供的往复锯锯片安装装置及往复锯，当未安装锯片时，夹持件和定位件之间夹持有压块且压块使得夹持件和定位件之间的间距大于或等于锯片的夹持端的厚度，需要安装锯片时，单手插入锯片使得夹持端抵接于夹持件、定位件和压块之间再继续插入锯片进而使压块退出于夹持件和定位件之间即可，单手可安装锯片，安装方便。在需要拆卸锯片时，夹持腔释放对夹持端的夹持，压块在弹性件的作用下即可弹出于夹持腔，拆卸十分方便。
附图说明
图1是本公开具体实施方式提供的往复锯的结构示意图；
图2是本公开具体实施方式提供的往复锯锯片安装装置的爆炸图；
图3是本公开具体实施方式提供的往复锯锯片安装装置处于夹持状态时的侧视图；
图4是沿图3中A-A线的剖视图；
图5是本公开具体实施方式提供的往复锯锯片安装装置处于夹持状态时的主视图；
图6是沿图5中B-B线的剖视图；
图7是沿图5中E-E线的剖视图；
图8是本公开具体实施方式提供的往复锯锯片安装装置处于释放状态时的侧视图；
图9是沿图8中C-C线的剖视图；
图10是本公开具体实施方式提供的往复锯锯片安装装置处于释放状态时的主视图；
图11是沿图10中D-D线的剖视图；
图12是沿图11中A处的局部放大图。
图中：
1、往复锯本体；
2、往复锯锯片安装装置；
3、锯片；31、夹持端；311、锁定孔；312、导向部；
4、往复杆；41、夹持腔；411、定位槽；
5、夹持机构；51、锁销；52、限位销；53、旋套；54、扭簧；55、衬套；56、后罩；57、第一卡簧；531、限位槽；532、调节槽；533、夹持位置；534、释放位置；561、容纳腔；541、第一支脚；542、第二支脚；
6、弹出机构；61、压块；62、第一弹性件；611、凸部；612、限位部；
7、第二弹性件；
8、第二卡簧；
9、间隙。
具体实施方式
下面结合附图并通过具体实施方式来进一步说明本公开的技术方案。
本具体实施方式提供了一种往复锯，如图1所示，其包括往复锯锯片安装装置2和锯片3，锯片3能够夹持于或脱离于往复锯锯片安装装置2，往复锯锯片安装装置2与往复锯本体1内的动力机构连接。需要说明地是，本文中的“前”、“后”、“左”、“右”等指示方位或位置关系的词，是基于附图所示的方位或位置关系，不应当理解为对本公开的限制，其中，靠近往复锯本体1的一端为后端、远离往复锯本体1的一端为前端。
如图2所示，锯片3的后端为夹持端31，往复锯锯片安装装置2包括往复杆4、夹持机构5和弹出机构6。往复杆4的前端轴向设置有夹持腔41，夹持腔41用于容纳夹持端31。夹持机构5被配置为能够使得往复锯锯片安装装置2在如图3至图7所示的夹持端31夹紧于夹持腔41中的夹持状态和如图8至图11所示的夹持端31脱离于夹持腔41的释放状态之间转换。弹出机构6能够提供使夹持端31脱离夹持腔41的弹力，从而易于锯片3的拆卸。
其中，具体地，如图2至图6所示，夹持机构5包括沿径向设置于夹持腔41上的夹持件，夹持件优选为锁销51。锁销51沿径向穿设于夹持腔41的侧壁 上，且锁销51能够沿夹持腔41的径向运动，从而使得往复锯锯片安装装置2在夹持端31被锁销51夹紧于夹持腔41中的夹持状态和夹持端31脱离于夹持腔41的释放状态之间转换。可理解地，夹持件在其他实施例中，也可以替换成其他结构，能够夹持夹持端31即可。
请继续参阅图4至图11，本实施例中，可以通过如下方式驱动锁销51沿径向运动：夹持机构5还包括定位件、旋套53和扭簧54，定位件优选但不局限为限位销52，限位销52与锁销51沿径向相对地设置于夹持腔41的侧壁上(沿径向相对地设置是指限位销52和锁销51的连线与往复杆4的轴线垂直)，旋套53可旋转地套设于往复杆4上，旋套53的内壁上设置有限位槽531和调节槽532，限位槽531的内壁面与限位销52的外端面配合，调节槽532的内壁面与锁销51的外端面配合，限位槽531呈弧形且与旋套53共轴线(共轴线是指轴线重合)，请参阅图4和图9，调节槽532上设置有夹持位置533、释放位置534和位于夹持位置533和释放位置534之间的平滑曲面，该平滑曲面优选为呈渐开线形曲面，夹持位置533较释放位置534靠近旋套53的轴线，锁销51能够在夹持位置533和释放位置534之间运动，当锁销51配合于夹持位置533时，锁销51与限位销52间的间距最小，当锁销51配合于释放位置534时，锁销51与限位销52间的间距最大，扭簧54提供使夹持位置533与锁销51靠近的力。
请结合参阅2、图4、图6、图7、图9和图11所示，为了避免限位销52和锁销51上下晃动，夹持机构5还包括套设于旋套53与往复杆4之间的衬套55，锁销51与限位销52沿径向穿设于衬套55上从而将衬套55固定套设于往复杆4上。
请结合参阅图2、图6、图7和图11，为了便于扭簧54的安装，夹持机构5还包括套设于往复杆4上的后罩56，后罩56位于旋套53后端，扭簧54至少部分容纳于后罩56中，扭簧54的两个支脚分别插入旋套53内和夹持腔41内。具体地，后罩56上沿周向设置有用于容纳扭簧54的一端开口的容纳腔561，扭簧54包括两个支脚，其中第一支脚541沿其弹簧本体的轴向设置、第二支脚542沿垂直于其弹簧本体轴向的方向设置，第一支脚541穿出容纳腔561的开口插设于旋套53的后端上，第二支脚542穿过容纳腔561的侧壁插入夹持腔41内。后罩56可以通过第二卡簧8或轴肩等形式定位于往复杆4上。旋套53可以通过后罩56和设置于衬套55上的且位于旋套53前端的限位结构实现轴向定位。 限位结构优选但不局限为第一卡簧57，第一卡簧57可以安装于衬套55上开设的安装槽中。
请继续参阅图2、图6、图7和图11，弹出机构6设置于夹持腔41内，弹出机构6包括压块61和第一弹性件62，压块61通过第一弹性件62可运动地连接于夹持腔41，第一弹性件62优选但不局限为弹簧，弹簧的后端固定于夹持腔41的底部、前端与压块61连接；当处于释放状态时，压块61被第一弹性件62弹性抵压于限位销52和锁销51之间，使得限位销52和锁销51之间的间距大于或等于夹持端31的厚度；当处于夹持状态时，压块61被夹持端31抵压脱离限位销52和锁销51之间，并压缩第一弹性件62。弹性机构的这种设置方式，在需要安装锯片3时，单手插入锯片3使得夹持端31抵接于锁销51、限位销52和压块61之间再继续插入锯片3进而使得压块61退出于锁销51和限位销52之间即可，单手可安装锯片3，安装方便。在需要拆卸锯片3时，转动旋套53使得锁销51向调节槽532的释放位置534运动，锁销51沿径向向外运动，锁销51与限位销52间的间距增大，压块61在第一弹性件62的作用下即可弹出于夹持腔41，拆卸十分方便。
如图2所示，为了避免锯片3在安装到位后松动，夹持端31上设置有锁定孔311，锁销51上具有与锁定孔311相配合的锁定凸起，往复锯锯片安装装置2处于夹持状态时，锁定凸起配合于锁定孔311中。当然，可理解地，可以将上述锁定孔311与锁定凸起的位置互换，即将上述锁定孔311设置于锁销51上，锁定凸起设置于夹持端31上。也可以将上述锁定孔311改设为锁定槽。
请继续参阅图2、图6和图11，为了避免在释放锯片3后，压块61穿出于限位销52和锁销51间，压块61在沿远离第一弹性件62的方向包括限位部612和凸部611，释放状态时，凸部611伸入锁销51和限位销52之间，限位部612抵接限位销52的侧壁。为了进一步方便锯片3的安装，压块61呈L形，即限位部612的一侧和凸部611的一侧对齐，限位部612的另一侧伸出于凸部611，释放状态时，锁销51的内端与夹持腔41的侧壁的内壁面对齐、限位销52的侧壁与限位部612伸出于凸部611的部分抵接。如此设置，沿锁销51一侧插入锯片3，可以确保夹持端31的末端准确地抵接挤于压块61上，操作更精确。在其他实施例中，释放状态时，限位部612也可以同时或仅抵接锁销51的侧壁。
锯片3的夹持端31的末端的一侧通常设置有导向部312，导向部312沿锯 片3长度方向设置。当安装锯片3时，导向部312的外壁基本沿夹持腔41的侧壁的内壁面滑动，以起到安装导向的作用。但是现有的锯片安装装置中，由于弹出机构6设置在夹持腔的一侧，因此导向部312仅能从一侧插入夹持腔中。本实施利中，弹出机构6设置在夹持腔41的中部，弹出机构6设置在夹持腔的中部，是指弹出机构6可以但不局限于设置于夹持腔41的中轴线上，也可以是相对于夹持腔41的中轴线有一定偏移，能保证弹出机构6的两侧与夹持腔41的侧壁的内壁面之间具有供导向部312插入的间隙9即可，因此导向部312可选择地从弹出机构6的两侧中的任一侧插入夹持腔中，因此提高了锯片3的使用工况。
为了在安装锯片3时更省力，锁销51与夹持腔41的侧壁之间设置有第二弹性件7，第二弹性件7沿径向提供使锁销51远离限位销52的力。具体地，第二弹性件7设置于夹持腔41的侧壁的外壁面与锁销51之间。如图12所示，可以在夹持腔41的侧壁的外壁面上设置一用于容纳第二弹性件7端部的定位槽411，以避免第二弹性件7晃动。第二弹性件7优选但不局限为弹簧。
以下结合附图2至图11，简要介绍本实施例提供的往复锯锯片安装装置2的使用方法：
如图8至图11所示，当未插入锯片3时，即处于夹持端31脱离于夹持腔41的释放状态时，压块61在第一弹性件62的作用下抵接限位销52和锁销51，具体地，压块61的凸部611夹持于限位销52和锁销51之间，压块61的限位部612抵接于限位销52的侧壁，锁销51的外端配合于调节槽532的释放位置534。
插入锯片3过程中，直接单手插入锯片3并使得夹持端31抵接压块61的凸部611的前端面，继续插入锯片3使得锯片3推动压块61向靠近夹持腔41底部的方向运动，同时压缩第一弹性件62，直至锁定凸起配合至锁定孔311中，如图3至图7所示，完成锯片3的安装，锁销51在扭簧54的作用下配合于调节槽532的夹持位置533，锁销51与限位销52间的间距最小。
拆卸锯片3时，转动旋套53使得锁销51的外端向靠近调节槽532释放位置534的方向运动，锁销51向远离限位销52的方向运动，第二弹性件7伸展锁销51退出，弹出机构6将锯片3从夹持腔41中弹出。
以上结合具体实施例描述了本公开的技术原理。这些描述只是为了解释本公开的原理，而不能以任何方式解释为对本公开保护范围的限制。基于此处的解释，本领域的技术人员不需要付出创造性的劳动即可联想到本公开的其它具体实施方式，这些方式都将落入本公开的保护范围之内。
工业实用性
本公开提供了一种往复锯锯片安装装置及往复锯，该复锯锯片安装装置及往复锯可单手安装锯片，操作方便。

Claims (10)

  1. 一种往复锯锯片安装装置，包括：
    往复杆，所述往复杆的前端轴向设置有用于夹持锯片的夹持端的夹持腔；
    夹持机构，包括沿径向相对地设置于所述夹持腔上的夹持件和定位件，
    所述夹持件能够沿径向运动从而使得所述往复锯锯片安装装置在所述夹持端被所述夹持件夹紧于所述夹持腔中的夹持状态和所述夹持端脱离于所述夹持腔的释放状态之间转换；以及
    弹出机构，设置于所述夹持腔内，所述弹出机构包括压块和第一弹性件；
    当处于所述释放状态时，所述压块被所述第一弹性件弹性抵压于所述夹持件和所述定位件之间，使得所述夹持件和所述定位件之间的间距大于或等于所述夹持端的厚度；
    当处于所述夹持状态时，所述压块被所述夹持端抵压脱离于所述夹持件和所述定位件之间，并压缩所述第一弹性件。
  2. 根据权利要求1所述的往复锯锯片安装装置，其特征在于，所述第一弹性件的两端分别与所述压块和所述夹持腔的腔底连接，所述压块在沿远离所述第一弹性件的方向包括限位部和凸部，所述释放状态时，所述凸部伸入所述夹持件与所述定位件之间，所述限位部抵接所述夹持件和/或所述定位件的侧壁。
  3. 根据权利要求2所述的往复锯锯片安装装置，其特征在于，所述压块呈L形，所述释放状态时，所述夹持件的内端与所述夹持腔的侧壁的内壁面对齐，所述定位件的侧壁与所述限位部抵接。
  4. 根据权利要求1至3任一项所述的往复锯锯片安装装置，其特征在于，所述弹出机构设置在夹持腔的中部。
  5. 根据权利要求1至3中任一项所述的往复锯锯片安装装置，其特征在于，所述夹持机构还包括旋套和扭簧，所述旋套可旋转地套设于所述往复杆上，所 述夹持件为锁销，所述定位件为限位销，所述锁销和所述限位销相对地穿设于所述夹持腔的侧壁上，所述旋套的内壁上设置有与所述限位销的外端配合的限位槽以及与所述锁销的外端配合的调节槽，所述限位槽呈弧形且与所述旋套共轴线，所述调节槽上设置有夹持位置、释放位置和位于所述夹持位置和所述释放位置之间的平滑曲面，所述夹持位置较所述释放位置靠近所述旋套的轴线，所述扭簧提供使所述夹持位置与所述锁销靠近的力。
  6. 根据权利要求5所述的往复锯锯片安装装置，其特征在于，所述夹持机构还包括套设于所述旋套与所述往复杆之间的衬套，所述夹持件和所述定位件分别沿径向穿设于所述衬套上。
  7. 根据权利要求6所述的往复锯锯片安装装置，其特征在于，所述夹持机构还包括套设于所述往复杆上的后罩，所述后罩位于所述旋套后端，所述扭簧至少部分容纳于所述后罩，所述扭簧的两个支脚分别插入所述夹持腔内和所述旋套内，所述衬套上设置有位于所述旋套前端的限位结构。
  8. 根据权利要求5所述的往复锯锯片安装装置，其特征在于，所述夹持腔的侧壁与所述锁销之间设置有第二弹性件，所述第二弹性件沿径向提供使所述锁销远离所述限位销的力。
  9. 根据权利要求5所述的往复锯锯片安装装置，其特征在于，所述夹持端与所述锁销中的一个上设置有锁定槽或者锁定孔、另一个上设置有与所述锁定槽或者所述锁定孔相配合的锁定凸起，所述往复锯锯片安装装置处于夹持状态时，所述锁定凸起配合于所述锁定槽或者所述锁定孔中。
  10. 一种往复锯，其特征在于，包括锯片和如权利要求1至9任一项所述的往复锯锯片安装装置。
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US20210046562A1 (en) 2021-02-18
US11504782B2 (en) 2022-11-22
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CN110434400B (zh) 2022-03-01
EP3778085A1 (en) 2021-02-17
EP3778085B1 (en) 2022-04-13

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