WO2017054275A1 - 复式锯的机头锁定结构以及复式锯 - Google Patents
复式锯的机头锁定结构以及复式锯 Download PDFInfo
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- WO2017054275A1 WO2017054275A1 PCT/CN2015/093189 CN2015093189W WO2017054275A1 WO 2017054275 A1 WO2017054275 A1 WO 2017054275A1 CN 2015093189 W CN2015093189 W CN 2015093189W WO 2017054275 A1 WO2017054275 A1 WO 2017054275A1
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- locking
- locking member
- lock
- work
- turntable
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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
- B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
Definitions
- the utility model relates to a head locking structure of a double saw and a double saw with the head locking structure.
- a machine that can do both the slanting work and the bench cutting work is called a double saw.
- the compound saw is mainly composed of a base assembly, a work turntable assembly (work turntable), a positioning plate, a rocker frame base, a head assembly (including a frame, a deck, a motor assembly, etc.) and a nose shaft.
- the working mode conversion of the compound saw is mainly achieved by adjusting the relative position of the saw blade and the table top mounted on the motor assembly, only when a part of the saw blade passes through the upper surface of the table panel through the saw blade slot on the table top.
- the table cutting work can be performed, and when the slanting work is performed, the general saw blade is entirely below the upper plane of the table top.
- the specific implementation methods are as follows: 1) the frame and the motor assembly are relatively fixed, the table top is translated relative to the frame and the motor assembly up and down, or the upper and lower swings are rotated; 2) the frame and the table top are relatively fixed, and the motor assembly is opposite to the frame and the motor assembly. , pan down or up and down.
- mode conversion mode when the double saw is in the table cutting mode, the head must be locked so that the table is in a horizontal static state.
- the locking position is close to the rotation axis of the head, and the bolt and the bolt hole are A small gap between them will cause a large swing of the distal end of the spindle shaft, and the gap between the bolt and the bolt hole should not be too small, otherwise the plug is more difficult to insert and remove; 3) because this structure is only Locking the head assembly and the rocker frame mount, and the rocker frame base and the work turntable There is a freedom of swing between the swings. If the rocker frame is not in a special position, it cannot guarantee that the countertop is parallel to the work turntable, that is, it cannot guarantee the horizontal position of the countertop when the required bench work is required. .
- the inventors have disclosed a head locking structure which locks the handpiece to the front end side of the turntable at the distal end of the frame from the rotating shaft of the head, substantially overcoming the above-mentioned three shortcomings of the prior art.
- the locking parts are all sheet metal parts, they are easily deformed during manufacturing and use, and it is not easy to achieve the desired design requirements.
- unpredictable causes or external force or misoperation may cause the lock to suddenly disengage, causing serious consequences, and may also cause the micro switch to open and close due to machine vibration or the like, affecting normal operation. .
- the utility model designs a head locking structure and a double saw including the head locking structure, which avoids the deformation of the sheet metal part during manufacture and use, and does not It is easy to achieve the defects of ideal design requirements, and it can lock the machine head to the front end surface of the turntable more reliably, avoiding unpredictable causes or external force or misoperation, causing the buckle to suddenly disengage and causing serious consequences, or due to machine vibration and the like.
- the micro switch is opened and interrupted, the normal operation is affected, and the stability of the safety and the power supply of the table is greatly improved.
- the present invention provides a head lock structure for a multiple saw, comprising: a locking member located on one of a frame of the double saw and a work turntable; wherein, the lock a fastener is disposed on the fastener, and the other of the frame and the work turntable is provided with a lap joint capable of forming a buckle with the lap, the lap is a A projection or recess on the locking member, and the overlapping engagement body is a paired recess or projection.
- the locking member is movable between a locked position in which the overlapping body on the locking member is coupled with the overlapping engagement body, and an unlocked position in the unlocked position The overlapping body on the locking member and the overlapping fitting body are disengaged from each other.
- the handpiece locking structure further includes: a lock safety self-locking member located on the other of the frame and the work turntable, In the locked position, the locking member is locked with the locking safety self-locking member, and in the unlocked position, the locking member is disengaged from the locking safety self-locking member, the locking buckle
- the safety self-locking member is elastically deformable, and the locking member can be automatically pressed into the locking position by elastic deformation, and the locking member is disengaged from the locking position to the unlocked position.
- the lock safety self-locking piece must be opened first by external force.
- the work turntable and the lock member each include a pin hole through which the pin is inserted into the pin hole of the work turntable In the pin hole of the locking member, the locking member is coupled to the work dial so as to be pivotable relative to the work dial.
- the work turntable includes a guide portion
- the lock member includes a guided portion
- the lock member utilizes the guide portion and the The engagement of the guided portion is connected to the work turntable so as to be movable relative to the work turntable.
- the lock member is a lock plate
- the lock safety self-locking member is an elastic piece
- the lock member is a lock plate
- the lock safety self-locking member includes a spring and a spring bias biased by the spring Pressing parts.
- an outer wall of the pin hole of the locking member is provided with an eccentric boss, such that the locking member passes through the The friction between the work turntable and the eccentric boss is self-locking in a horizontal position to serve as a turntable handle.
- the micro switch contact hole and the micro switch facing the micro switch touch hole are provided in the frame, when When the micro switch is turned on, the double saw enters a working mode, and the micro-switch touch body is disposed on the locking member, and the micro-motion is when the locking member enters the locking position
- the switch touch body touches the micro switch through the micro switch touch hole, thereby turning on the micro switch.
- the present invention provides a compound saw comprising: the head lock structure according to any one of the first to eighth aspects.
- the head locking structure according to the present invention and the double saw having the head locking structure can obtain the following beneficial effects: the head can be locked more reliably on the front end surface of the turntable, under the action of the lock safety self-locking member It can avoid unpredictable reasons or external force or misoperation, causing the buckle to suddenly disengage and cause serious consequences, or cause the micro switch to open and break due to machine vibration and other reasons, thus affecting normal work, thus safety and power cut
- the stability is greatly improved.
- FIG. 1 is a schematic view of a multiple saw having a head lock structure in accordance with the present invention, wherein the head lock plate is in an unlocked position;
- FIG. 2 is a schematic view of a multiple saw having a head lock structure in accordance with the present invention, wherein the head lock plate is in a locked position;
- FIG 3 is an exploded perspective view of a multiple saw having a head lock structure in accordance with the present invention.
- FIGS. 1 to 3 are schematic views of a multiple saw having a handpiece locking structure in accordance with the present invention.
- the multiple saw includes a base assembly 1, a work turntable 2, a positioning plate 3, a rocker frame base 4, a frame 5, a nose shaft 6 and a countertop, wherein the frame 5, the motor assembly and the countertop are generally collectively referred to as a machine Head or head assembly.
- the frame 5 is the core mount of the head assembly, and the table top is fixedly mounted on the upper portion of the frame 5, and the locking of the frame is also the locking of the head assembly.
- the head assembly is swingable about the nose shaft 6.
- the compound saw further includes a head lock structure, the head lock structure includes a lock member 7, a lock
- the fastener 7 is located on one of the frame 5 of the double saw and the work turntable 2, and a fastening body 71 is provided on the locking member 7, and the other of the frame 5 and the work turntable 2 is provided with
- the overlapping body 51 forms a latching engagement body 51 with the overlapping body 71.
- the overlapping body 71 is a convex portion or a concave portion on the locking member 7, and the overlapping fitting body 51 is a paired concave portion or convex portion.
- the handpiece locking structure further includes a latching safety self-locking member 8 that is located on the other of the frame 5 and the work carousel 2.
- the locking member 7 is movable between a locking position in which the overlapping body 71 and the overlapping fitting body 51 are engaged, and the locking safety self-locking member 8 automatically locks the locking member 7; In the unlocked position, the overlapping body 71 and the overlapping fitting body 51 are disengaged from each other.
- the lock safety self-locking member 8 is elastically deformable, and the elastic deformation causes the locking member 7 to be automatically pressed into the locked protection state, and the locking member is to be disengaged from the locked position to the unlocked position, and the external force must be applied. First open the lock and secure the lock.
- the locking member 7 is located on the work carousel 2, and the lap joint body 51 and the lock safety self-locking member 8 are located on the frame 5.
- the latching member 7 is located on the frame 5, and the lap jointing body 51 and the latching safety self-locking member 8 are located on the work carousel 2.
- the locked position is the position when the locking member is in a vertical orientation.
- the locking position of the locking member 7 is not limited to the vertical position, but may be a position slightly offset from the vertical orientation, or a position at which the locking member 7 is at an angle with respect to the horizontal direction.
- the locking member 7 is pivotable relative to the work carousel 2.
- the work carousel 2 includes a pin hole 21, and the lock member 7 also includes a corresponding pin hole, and the pin 9 is inserted into the pin hole 21 of the work carousel 2 and the corresponding pin hole in the lock member 7.
- the locking member 7 is connected to the work carousel 2, so that the locking member 7 can pivot relative to the work carousel 2.
- the latching member 7 is provided with a projecting pin portion that is inserted into the pin hole 21 of the work carousel 2 so that the latching member 7 can pivot relative to the work carousel 2.
- the work carousel 2 is provided with a projecting pin portion which is inserted into the pin hole of the lock member 7, so that the lock member 7 can pivot relative to the work carousel 2.
- pivotal connection mechanism commonly used in the art, and the present invention is not limited to these pivotal connection mechanisms, but may be any pivotal connection mechanism as long as it allows the locking member 7 to be pivoted relative to the worktable 2 Just turn.
- the locking member 7 is linearly movable relative to the work carousel 2 (translation).
- the work carousel 2 includes a guide portion, and the lock member 7 includes a guided portion, and the lock member 7 is coupled to the work carousel 2 by the cooperation of the guide portion and the guided portion so as to be movable relative to the work carousel 2.
- the guide can be a rail.
- the guide portion on the work disk 2 may be a guide groove
- the guided portion on the lock member 7 may be a guided protrusion.
- the guide portion on the work carousel 2 may be a convex portion
- the guided portion on the lock member 7 may be a guide groove.
- the head lock structure includes a work turntable 2, a frame 5, a head lock plate 7, a self-locking elastic piece 8, and a lock plate shaft pin 9.
- the head lock plate 7 is a plate whose rotation axis is located in its main plane.
- the self-locking elastic piece 8 is an example of a lock safety self-locking member.
- the frame 5 is coupled to the rocker frame base 4 via a head shaft 6 at one end so as to be swingable relative to the work disk 2.
- the head lock plate 7 and the self-locking elastic piece 8 are respectively mounted at the opposite ends of the work carousel 2 and the frame 5, that is, the side of the double saw which is close to the operator. In Fig. 3, the side of the duplex saw near the operator is the right side.
- the work carousel 2 is set on the base unit 1, and the front side of the work carousel 2 is provided with a pin mounting hole 21 of the head lock plate 7.
- the front side of the frame 5 is provided with a lap joint body 51 of the head lock plate 7 and a mounting hole 52 of the self-locking elastic piece 8, and a micro switch contact hole 53.
- the lap joint body 51 is shown as a rectangular boss in the figure, and may be a boss of any shape, and may also be a recess of any shape, as long as the lap joint body 51 can be matched with the lap body 71 as a pair of latches. Just fine.
- the micro switch is mounted inside the frame 5, and the pressing switch of the micro switch faces the micro switch contact hole 53 provided on the frame.
- the microswitch is only part of the desk circuit. Only when the button is pressed down, the working circuit of the table can be smoothed.
- the head lock plate 7 is pinned to the front surface of the work turntable 2, and can be locked in a horizontal position by frictional self-locking, and can be rotated 90 degrees upward from the horizontal position by an external force under an external force.
- the center of the head lock plate 7 is provided with a bridge body 71, and the front end is provided with a micro switch contact body 72.
- the outer wall of the pin mounting hole is provided with an eccentric boss 73, so that the head lock plate 7 is turned to the horizontal position When locked, the lock can be locked in a horizontal position.
- the lap joint 71 is shown as a rectangular recessed hole in the figure, and may be a recessed hole of any shape, and may be a boss, a hook or the like of any shape as long as it can be combined with the lap jointing body 51 to form a pair of latches. can.
- the self-locking elastic piece 8 is fixedly mounted on the frame 5 for locking the head lock plate 7 engaged with the frame.
- the lock plate axle pin 9 is used to splicing the work carousel 2 and the head lock plate 7 together.
- the lock safety self-locking member is not limited to the above-described elastic pieces, but other structures may be employed.
- the lock safety self-locking member includes a spring and a spring biased spring biasing member that pushes the spring biasing member into the retracted position against the spring force of the spring when the head lock plate 7 moves toward the locked position (biased position)
- the spring biasing member returns to the initial position due to the restoring force of the spring.
- the lock safety self-locking member can be returned to the initial position where there is no deformation.
- the lock safety self-locking member may still be deformed, thereby still applying a latching force to the nose lock plate 7.
- the lock safety self-locking member is not limited to the above-exemplified structure, but may be any elastic locking structure as long as it can be elastically deformed and elastically deformed to bring the lock member into the locked position or the unlocked position.
- the head lock plate 7 When the double saw is in the oblique working mode, the head lock plate 7 is fixed at the front of the working turn by the frictional force between the self-gravity and the rotating eccentric boss 73 and the work turntable 2, and functions as a handle, which can be used for Turn the work carousel.
- A is a head lock plate in a flat state
- B is a frictional joint of the head lock plate and the work turntable.
- the head In order to convert the double saw into the working mode, the head must be pressed down and the overlapping body 71 on the head lock plate 7 is fastened to the overlapping body 51 on the frame 5 to fix the head assembly. Keep the deck in a horizontal position. If the fastening is successful, the self-locking elastic piece 8 will automatically catch the head lock plate 7 to prevent the tripping due to some unpredictable reasons, and the micro switch contact body 72 provided on the head lock plate 7 It also touches and activates the microswitch located inside the frame to control the machine circuit (see Figure 2).
- the double saw is to be converted to the oblique working mode, as long as the trigger head lock plate 7 At the same time, using the thumb to open the self-locking elastic piece 8 can smoothly unlock the locking head.
- the locking of the handpiece is unlocked, it also means that the circuit of the desk cutting mode is cut off.
- the design of the design is greatly improved by attaching the head lock plate 7 to the handpiece assembly from the work turntable assembly on the front side of the compound saw head furthest from the frame pivot 6. It improves the locking precision of the machine head, ensures the horizontal position requirement of the table top in the locked state of the machine head, and simplifies the manufacturing precision requirements of the related lap joint parts, improves the safety and reliability, and truly realizes the table cut. Mechatronic control of the working mode.
- the locking member utilizes the cam principle self-locking locking and functions as a turntable handle when in the horizontal position; the head locking plate and the table-cut mode switch trigger in the vertical position The role.
- a protrusion or a recess is provided on the locking member to engage with the mating recess or the projection, thereby avoiding the defect that the sheet metal member is easily deformed during manufacture and use, and the desired design requirement is not easily achieved.
- the self-locking shrapnel has the following important functions for the self-locking of the head lock plate: 1. The safety is greatly improved; 2. The stability of the table-cut power is greatly improved. If the self-locking shrapnel is not available, it is unpredictable. The cause or external force or misoperation may cause the lock to suddenly disengage, causing serious consequences. It may also cause the micro switch to open and close due to machine vibration and other reasons, which may affect normal operation.
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Abstract
一种复式锯的机头锁定结构以及复式锯。机头锁定结构包括：锁扣件（7），其位于复式锯的框架（5）和工作转盘（2）之中的一者上；其中，在锁扣件（7）上设有搭接体（71），在框架（5）和工作转盘（2）之中的另一者上设有能够与搭接体（71）形成锁扣的搭接配合体（51），搭接体（71）为锁扣件（7）上的凸部或凹部，而搭接配合体（51）为配对的凹部或凸部，锁扣件（7）能够在锁定位置和非锁定位置之间运动，在锁定位置，锁扣件上的搭接体（71）与搭接配合体（51）结合在一起，在非锁定位置，锁扣件上的搭接体（71）与搭接配合体（51）相互脱开。
Description
本实用新型涉及一种复式锯的机头锁定结构以及具有该机头锁定结构的复式锯。
既能做斜断工作又能做台切工作的机器称为复式锯。复式锯主要由底座组件、工作转盘组件(工作转盘)、定位板、摇杆框架座、机头组件(包含框架、台面板、电机组件等)、机头转轴所组成。所有复式锯的工作过程都存在一个工作模式转换过程。复式锯的工作模式转换主要是通过调节装在电机组件上的锯片与台面板的相对位置来实现的，只有锯片的一部分穿过台面板上的锯片槽高出台面板的上平面时才可进行台切工作，而进行斜断工作时，一般锯片的整体都位于台面板的上平面之下。具体实现的方法有：1)框架与电机组件相对固定，台面板相对于框架与电机组件上、下平移或上、下摆转；2)框架与台面板相对固定，电机组件相对框架与电机组件上、下平移或上、下摆转。然而，无论采用哪种模式转换方式，当复式锯处于台切工作模式时，必须对机头进行锁定，使台面板处于水平静止稳固状态。
在国内外现有技术中，最常用的是用插销将机头组件与摇杆框架座锁定在一起。这种设计虽然符合传统斜断锯的使用习惯，但对于复式锯则存在诸多明显的不足：1)操作视野不好，插销有时不容易插入处于被台面板等零部件遮挡了的插销孔内；2)机头锁定精度不高，这是因为机头转轴和插销都与同一零件——摇杆框架座结合，受此结构的影响，其锁定位置离机头转轴位置较近，插销与插销孔之间较小的间隙就会造成机头转轴远端较大的摆动，并且插销与插销孔之间的间隙还不能太小，否则插销的拔插就更困难了；3)因为这种结构只是将机头组件与摇杆框架座锁定了，而摇杆框架座与工作转盘之
间是有摆转自由度的，如果摇杆框架座不是处于某一特殊位置，并不能保证台面板与工作转盘平行，也即不能保证所要求的台切工作时台面板要处于水平位置的要求。
在专利ZL201520200007.8中，发明人公布了一种机头锁定结构，它在框架离机头转轴的远端将机头锁定在转盘的前端侧面，基本上克服了现有技术的上述三点不足，但由于其锁定零件均是钣金件，制造和使用过程中都容易变形，不容易达到理想的设计要求。此外，在该现有技术中，不可预知的原因或外力作用或误操作可能使锁扣突然脱开，造成严重后果，也可能由于机器震动等原因造成微动开关时开时断，影响正常工作。
实用新型内容
为解决现有技术的上述不足，本实用新型设计了一个机头锁定结构以及包括该机头锁定结构的复式锯，该机头锁定结构避免了钣金件在制造和使用过程中容易变形、不容易达到理想设计要求的缺陷，能够更可靠地将机头锁定在转盘的前端面，避免不可预知的原因或外力作用或误操作使锁扣突然脱开而造成严重后果，或者由于机器震动等原因造成微动开关时开时断而影响正常工作，从而安全性和台切通电的稳定性都极大提高。
根据第一方面，本实用新型提供了一种复式锯的机头锁定结构，包括：锁扣件，其位于所述复式锯的框架和工作转盘之中的一者上；其中，在所述锁扣件上设有搭接体，在所述框架和所述工作转盘之中的另一者上设有能够与所述搭接体形成锁扣的搭接配合体，所述搭接体为所述锁扣件上的凸部或凹部，而所述搭接配合体为配对的凹部或凸部。所述锁扣件能够在锁定位置和非锁定位置之间运动，在所述锁定位置，所述锁扣件上的搭接体与所述搭接配合体结合在一起，在所述非锁定位置，所述锁扣件上的搭接体与所述搭接配合体相互脱开。
根据第二方面，根据第一方面的机头锁定结构还包括：锁扣安全自锁件，其位于所述框架和所述工作转盘之中的所述另一者上，在所
述锁定位置，所述锁扣件与所述锁扣安全自锁件锁定在一起，在所述非锁定位置，所述锁扣件与所述锁扣安全自锁件脱开，所述锁扣安全自锁件是能弹性变形的，并且通过弹性变形使所述锁扣件能自动按压进入所述锁定位置，而所述锁扣件要从所述锁定位置脱开到所述非锁定位置，则必须靠外力先顶开所述锁扣安全自锁件。
根据第三方面，在根据第一或第二方面的机头锁定结构中，所述工作转盘和所述锁扣件均包括销孔，通过将销插入所述工作转盘的所述销孔和所述锁扣件的所述销孔中，所述锁扣件与所述工作转盘连接，从而能够相对于所述工作转盘枢转。
根据第四方面，在根据第一或第二方面的机头锁定结构中，所述工作转盘包括引导部，所述锁扣件包括被引导部，所述锁扣件利用所述引导部和所述被引导部的配合与所述工作转盘连接，从而能够相对于所述工作转盘移动。
根据第五方面，在根据第一或第二方面的机头锁定结构中，所述锁扣件是锁扣板，所述锁扣安全自锁件是弹性片。
根据第六方面，在根据第一或第二方面的机头锁定结构中，所述锁扣件是锁扣板，所述锁扣安全自锁件包括弹簧和被所述弹簧偏压的弹簧偏压部件。
根据第七方面，在根据第三方面的机头锁定结构中，所述锁扣件的所述销孔的外壁设有偏心凸台，使得所述锁扣件在转至水平位置时通过所述工作转盘与所述偏心凸台之间的摩擦力自锁在水平位置，从而用作转盘手柄。
根据第八方面，在根据第三方面的机头锁定结构中，在所述框架内设有微动开关触碰孔以及正对着所述微动开关触碰孔的微动开关，当所述微动开关接通时，所述复式锯进入台切工作模式，在所述锁扣件上设有微动开关触碰体，当所述锁扣件进入所述锁定位置时，所述微动开关触碰体穿过所述微动开关触碰孔触碰所述微动开关，从而接通所述微动开关。
根据第九方面，本实用新型提供了一种复式锯，包括：根据第一至第八方面中任一方面的机头锁定结构。
根据本实用新型的机头锁定结构以及具有所述机头锁定结构的复式锯能够获得以下有益效果：能够更可靠地将机头锁定在转盘的前端面，在锁扣安全自锁件的作用下，可避免不可预知的原因或外力作用或误操作使锁扣突然脱开而造成严重后果，或者由于机器震动等原因造成微动开关时开时断而影响正常工作，从而安全性和台切通电的稳定性都极大提高。
下面参考附图描述本实用新型的示例性实施例，在附图中：
图1是具有根据本实用新型的机头锁定结构的复式锯的示意图，其中，机头锁扣板处于非锁定位置；
图2是具有根据本实用新型的机头锁定结构的复式锯的示意图，其中，机头锁扣板处于锁定位置；以及
图3是具有根据本实用新型的机头锁定结构的复式锯的分解示意图。
下面参考附图描述本实用新型的优选实施例。
下面将参考图中所示的方向进行描述。但是这些方向仅仅是为了方便描述而设定的，并非意图限制本实用新型的保护范围。
基本结构
图1至图3是具有根据本实用新型的机头锁定结构的复式锯的示意图。如图所示，复式锯包括底座组件1、工作转盘2、定位板3、摇杆框架座4、框架5、机头转轴6和台面板，其中框架5、电机组件和台面板通常统称为机头或机头组件。
框架5是机头组件的核心安装件，台面板固定地安装在框架5上部，对框架的锁定也就是对机头组件的锁定。机头组件能够围绕机头转轴6摆动。
复式锯还包括机头锁定结构，该机头锁定结构包括锁扣件7，锁
扣件7位于复式锯的框架5和工作转盘2之中的一者上，在锁扣件7上设有搭接体71，在框架5和工作转盘2之中的另一者上设有能够与搭接体71形成锁扣的搭接配合体51，搭接体71为锁扣件7上的凸部或凹部，而搭接配合体51为配对的凹部或凸部。
在一个实施例中，该机头锁定结构还包括锁扣安全自锁件8，锁扣安全自锁件8位于框架5和工作转盘2之中的另一者上。锁扣件7能够在锁定位置和非锁定位置之间运动，在锁定位置，搭接体71和搭接配合体51配合在一起，并且锁扣安全自锁件8自动将锁扣件7锁定；在非锁定位置，搭接体71和搭接配合体51相互脱开。锁扣安全自锁件8是能弹性变形的，并且通过弹性变形使锁扣件7能自动按压进入锁定的保护状态，而锁扣件要从锁定位置脱开到非锁定位置，则必须靠外力先顶开锁扣安全自锁件。
在一个实施例中，锁扣件7位于工作转盘2上，而搭接配合体51和锁扣安全自锁件8位于框架5上。在另一个实施例中，锁扣件7位于框架5上，而搭接配合体51和锁扣安全自锁件8位于工作转盘2上。
优选地，锁定位置是当锁扣件处于竖直方位时的位置。当然，锁扣件7的锁定位置并不限于竖直位置，而是可以是稍偏离竖直方位的位置、或者锁扣件7相对于水平方向成一定角度的位置。
在一个实施例中，锁扣件7能够相对于工作转盘2枢转。参考图3，工作转盘2包括销孔21，锁扣件7也包括对应的销孔，销9插入工作转盘2的销孔21和锁扣件7中的对应销孔。通过销9与销孔的配合，锁扣件7与工作转盘2连接，从而锁扣件7能够相对于工作转盘2枢转。在另一个实施例中，锁扣件7上设有凸出的销部，该销部插入工作转盘2的销孔21中，从而锁扣件7能够相对于工作转盘2枢转。或者，工作转盘2上设有凸出的销部，该销部插入锁扣件7的销孔中，从而锁扣件7能够相对于工作转盘2枢转。
以上列举的仅仅是本领域常用的枢转连接机构的一部分，本实用新型不限于这些枢转连接机构，而是可以为任何枢转连接机构，只要其允许锁扣件7相对于工作转盘2枢转即可。
在另一个实施例中，锁扣件7能够相对于工作转盘2直线地移动
(平移)。工作转盘2包括引导部，锁扣件7包括被引导部，锁扣件7利用引导部和被引导部的配合与工作转盘2连接，从而能够相对于工作转盘2移动。引导部可以是导轨。具体地说，工作转盘2上的引导部可以是引导槽，而锁扣件7上的被引导部可以是被引导凸部。或者，工作转盘2上的引导部可以是凸部，而锁扣件7上的被引导部可以是引导槽。
以上列举的仅仅是本领域常用的移动连接机构的一部分，本实用新型不限于这些移动连接机构，而是可以为任何移动连接机构，只要其允许锁扣件7相对于工作转盘2直线地或曲线地移动即可。
在一个具体的实施例中，参考图3，机头锁定结构包括工作转盘2、框架5、机头锁扣板7、自锁弹片8、锁扣板轴销9。作为锁扣件的一个实例，机头锁扣板7是旋转轴线位于其主平面内的板。自锁弹片8是锁扣安全自锁件的一个实例。
框架5在一端经由机头转轴6与摇杆框架座4连接，从而能够相对于工作转盘2摆动。机头锁扣板7和自锁弹片8分别安装在工作转盘2和框架5的相反一端，即复式锯的靠近操作者的一侧。在图3中，复式锯的靠近操作者的一侧为右侧。
工作转盘2套装在底座组件1上，工作转盘2的前部正面设有机头锁扣板7的轴销安装孔21。框架5前部正面设有机头锁扣板7的搭接配合体51和自锁弹片8的安装孔52，还有微动开关触碰孔53。搭接配合体51在图中示为一矩形凸台，也可以是任何形状的凸台，还可是任何形状的凹陷部，只要搭接配合体51能够与搭接体71配成一副锁扣即可。
微动开关安装在框架5的内部，微动开关的按掣朝外正对着框架上所设的微动开关触碰孔53。微动开关仅是台切工作电路的一部分。只有往下压住其按掣，台切工作电路才能通畅。
机头锁扣板7销接在工作转盘2的前部正面，能够靠摩擦力自锁锁定在水平位置，同时能够在外力作用下绕轴销从水平位置向上转动90度。机头锁扣板7的中部设有搭接体71，前端设有微动开关触碰体72。轴销安装孔的外壁设有偏心凸台73，使机头锁扣板7转至水平位
置时能够自锁锁定在水平位置不动。搭接体71在图中示为一矩形凹孔，也可以是任何形状的凹孔，还可是任何形状的凸台、挂钩等，只要其能够与搭接配合体51配成一副锁扣即可。
自锁弹片8固定地安装在框架5上，用于对与框架接合后的机头锁扣板7进行锁定。锁扣板轴销9用于将工作转盘2和机头锁扣板7窜接在一起。
锁扣安全自锁件不限于上文列举的弹片，而是可以采用其它结构。例如锁扣安全自锁件包括弹簧和被弹簧偏压的弹簧偏压部件，当机头锁扣板7向锁定位置运动时，克服弹簧的弹性力使弹簧偏压部件进入退避位置(偏压位置)，当机头锁扣板7越过弹簧偏压部件到达锁定位置时，弹簧偏压部件因为弹簧的恢复力而回到初始位置。
当机头锁扣板7到达锁定位置时，锁扣安全自锁件可以回到不存在变形的初始位置。或者，当机头锁扣板7到达锁定位置时，锁扣安全自锁件可以仍然存在变形，从而仍然对机头锁扣板7施加锁扣力。
锁扣安全自锁件不限于上面列举的结构，而是可以为任何弹性锁定结构，只要其能弹性变形并且通过弹性变形使锁扣件进入锁定位置或非锁定位置即可。
工作原理
当复式锯在斜断工作模式时，机头锁扣板7靠其自身重力和旋转后偏心凸台73与工作转盘2之间的摩擦力水平固定在工作转盘前部，起手柄作用，可用于转动工作转盘。图1中A为平置状态的机头锁扣板，B为机头锁扣板与工作转盘的摩擦结合处。
复式锯要想转换为台切工作模式，须先将机头压下并将机头锁扣板7上的搭接体71扣在框架5上的搭接配合体51上，将机头组件固定并使台面板处于水平位置。如果扣接成功，自锁弹片8就会自动卡住机头锁扣板7，防止因一些不可预知的原因导致脱扣，同时设在机头锁扣板7上的微动开关触碰体72也会碰压并启通位于框架内部的微动开关，对机器电路进行控制(参见图2)。
如复式锯又要想转换为斜断工作模式，只要在扳动机头锁扣板7
的同时用姆指顶开自锁弹片8就可顺利解开对机头的锁定。当然，一旦解开了对机头的锁定，也意味着切断了台切模式的电路。
在一个实施例中，在复式锯机头离框架转轴6最远处的正面，从工作转盘组件上将机头锁扣板7搭接到机头组件上，这一设计极大地改善了操作视野，提高了机头的锁定精度，保证了台面板在机头锁定状态的水平位置要求，同时简化了对相关搭接零部件的制造精度要求，安全性、可靠性均有提高，真正实现台切工作模式的机电一体控制。
根据本实用新型的机头锁定结构，锁扣件在处于水平位置时利用凸轮原理的自锁锁定并起转盘手柄的作用；在竖直位置时起机头锁扣板以及台切模式开关触发器的作用。在锁定件上设置凸部或凹部，与配对的凹部或凸部锁扣配合，从而避免了钣金件在制造和使用过程中容易变形、不容易达到理想设计要求的缺陷。
自锁弹片对机头锁扣板的自锁对整机功能具有如下重要作用：1、安全性极大提高；2、台切通电的稳定性极大提高，如果没此自锁弹片，不可预知原因或外力作用或误操作，可能使锁扣突然脱开，造成严重后果，也可能由于机器震动等原因造成微动开关时开时断，影响正常工作。
以上出于解释和说明的目的提供了本实用新型的一些示例性实施例。但是，前述解释和说明并非意在穷举或将本实用新型限制在所披露的具体形式。显然，对于本技术领域的技术人员来说，可以进行多种修改和变型。在本实用新型的精神和范围内，可以任意组合、替换和省略各个特征，并且可以任意组合各个实施例和技术方案。因此，本实用新型的保护范围仅由所附权利要求及其等同内容限定。
Claims (9)
- 一种复式锯的机头锁定结构，包括：锁扣件，其位于所述复式锯的框架和工作转盘之中的一者上；其中，在所述锁扣件上设有搭接体，在所述框架和所述工作转盘之中的另一者上设有能够与所述搭接体形成锁扣的搭接配合体，所述搭接体为所述锁扣件上的凸部或凹部，而所述搭接配合体为配对的凹部或凸部，所述锁扣件能够在锁定位置和非锁定位置之间运动，在所述锁定位置，所述锁扣件上的搭接体与所述搭接配合体结合在一起，在所述非锁定位置，所述锁扣件上的搭接体与所述搭接配合体相互脱开。
- 根据权利要求1所述的机头锁定结构，还包括：锁扣安全自锁件，其位于所述框架和所述工作转盘之中的所述另一者上，在所述锁定位置，所述锁扣件与所述锁扣安全自锁件锁定在一起，在所述非锁定位置，所述锁扣件与所述锁扣安全自锁件脱开，所述锁扣安全自锁件是能弹性变形的，并且通过弹性变形使所述锁扣件能自动按压进入所述锁定位置，而所述锁扣件要从所述锁定位置脱开到所述非锁定位置，则必须靠外力先顶开所述锁扣安全自锁件。
- 根据权利要求1或2所述的机头锁定结构，其中，所述工作转盘和所述锁扣件均包括销孔，通过将销插入所述工作转盘的所述销孔和所述锁扣件的所述销孔中，所述锁扣件与所述工作转盘连接，从而能够相对于所述工作转盘枢转。
- 根据权利要求1或2所述的机头锁定结构，其中，所述工作转盘包括引导部，所述锁扣件包括被引导部，所述锁扣件利用所述引导部和所述被引导部的配合与所述工作转盘连接，从而 能够相对于所述工作转盘移动。
- 根据权利要求1或2所述的机头锁定结构，其中，所述锁扣件是锁扣板，所述锁扣安全自锁件是弹性片。
- 根据权利要求1或2所述的机头锁定结构，其中，所述锁扣件是锁扣板，所述锁扣安全自锁件包括弹簧和被所述弹簧偏压的弹簧偏压部件。
- 根据权利要求3所述的机头锁定结构，其中，所述锁扣件的所述销孔的外壁设有偏心凸台，使得所述锁扣件在转至水平位置时通过所述工作转盘与所述偏心凸台之间的摩擦力自锁在水平位置，从而用作转盘手柄。
- 根据权利要求3所述的机头锁定结构，其中，在所述框架内设有微动开关触碰孔以及正对着所述微动开关触碰孔的微动开关，当所述微动开关接通时，所述复式锯进入台切工作模式，在所述锁扣件上设有微动开关触碰体，当所述锁扣件进入所述锁定位置时，所述微动开关触碰体穿过所述微动开关触碰孔触碰所述微动开关，从而接通所述微动开关。
- 一种复式锯，其包括根据权利要求1至8中任一项所述的机头锁定结构。
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