WO2020062949A1

WO2020062949A1 - Blade assembly, and tool comprising blade assembly

Info

Publication number: WO2020062949A1
Application number: PCT/CN2019/091567
Authority: WO
Inventors: 陈立
Original assignee: 陈立
Priority date: 2018-09-27
Filing date: 2019-06-17
Publication date: 2020-04-02

Abstract

Disclosed are a blade assembly, and a tool comprising the blade assembly. The blade assembly comprises: a first blade and a second blade both extending in the lengthwise direction of the blade assembly, with a first blade edge portion and a third blade edge portion being respectively provided on two sides of the first blade in the widthwise direction, and a second blade edge portion and a fourth blade edge portion being respectively provided on two sides of the second blade in the widthwise direction, wherein the first blade edge portion and the second blade edge portion are each formed of sawteeth arranged in the lengthwise direction, and the first blade edge portion and the second blade edge portion cooperate with each other to realize a saw-cutting function; and the third blade edge portion and the fourth blade edge portion are each formed of scissor teeth arranged in the lengthwise direction, and the third blade edge portion and the fourth blade edge portion cooperate with each other to realize a trimming function.

Description

Blade assembly and tool including blade assembly

Technical field

The invention relates to a blade assembly and a tool including the blade assembly, and in particular, to a multifunctional tool having two functions of sawing and trimming and a blade assembly thereof.

Background technique

Reciprocating saws driven by a power mechanism (such as a motor, an engine, or a pneumatic device) have been widely used. Such reciprocating saws have a blade assembly capable of reciprocating linear movement.

However, the reciprocating saws on the existing market only use a single blade (saw blade). During the operation, the cutting is performed only when the blade is fed. For various blades, the function is only sawing, and no new functions have been expanded.

Summary of the Invention

The invention is based on a traditional reciprocating saw, and proposes a blade assembly and a tool including the blade assembly.

The blade assembly includes a first blade and a second blade, and the first blade and the second blade each extend along a length direction of the blade assembly, and opposite sides in a width direction of the first blade A first blade portion and a third blade portion are respectively provided on the top; and a second blade portion and a fourth blade portion are provided on opposite sides in the width direction of the second blade, respectively; and a connecting assembly, which allows The first blade and the second blade overlap and connect the first blade and the second blade in a manner of reciprocating in the length direction relative to each other; wherein the first blade portion It is composed of saw teeth arranged along the length direction, the second blade portion is formed of saw teeth arranged along the length direction, and the first blade portion and the second blade portion cooperate with each other to realize a sawing function; The third blade portion is composed of scissors teeth arranged in the length direction, the fourth blade portion is composed of scissors teeth arranged in the length direction, and the third blade portion and the fourth blade portion are matched with each other. To achieve the trimming function.

In some embodiments, m first long holes are arranged along the length direction on the first blade, m is an integer greater than or equal to 1, and each first long hole extends along the length direction and along The thickness direction of the first blade penetrates the first blade; m second long holes corresponding to the m first long holes are arranged on the second blade along the length direction, and each Two second long holes extend along the length direction and penetrate the second blade along the thickness direction of the second blade; and the connection assembly includes m connection members, each connection member being capable of allowing the first A blade and the second blade are mounted on the corresponding first long hole and the second long hole in a manner of reciprocating in the length direction relative to each other.

In some embodiments, each connecting member includes a connecting rod and a first hat-shaped head and a second hat-shaped head connected to both ends of the connecting rod, wherein the connecting rod passes through a corresponding first length Holes and second long holes, the inner end surface of the first cap-shaped head facing the second blade is buckled on the outer surface of the first blade remote from the second blade, and the second cap-shaped The inner end surface of the head facing the first blade is buckled on the outer surface of the second blade remote from the first blade.

In some embodiments, the first long hole is a stepped hole, and is formed by a narrow hole portion having a smaller size in a width direction of the blade assembly and a portion of the narrow hole portion remote from the second blade. The second long hole is a stepped hole and has a narrow hole portion having a smaller size in the width direction of the blade assembly And a wide hole portion located on the outside of the narrow hole portion away from the first blade and having a larger size in the width direction of the blade assembly; and each connecting member includes a connecting rod and is connected to the connection A first hat-shaped head and a second hat-shaped head at both ends of the rod, and the connecting rod passes through the narrow hole portion of the corresponding first long hole and the narrow hole portion of the corresponding second long hole, the first The hat-shaped head is placed in the wide hole portion of the corresponding first long hole and the inner end surface of the first hat-shaped head facing the second blade is buckled on the bottom surface of the wide hole portion of the corresponding first long hole. On and the first cap-shaped head Away from the outer end surface of the second blade not exceeding the outer side of the first blade away from the second blade; the second cap-shaped head is placed in the wide hole portion of the corresponding second long hole and The inner end surface of the second hat-shaped head facing the first blade is buckled on the bottom surface of the wide hole portion, and the outer end surface of the second hat-shaped head that is far from the first blade does not exceed An outer side of the second blade remote from the first blade.

In some embodiments, m first long holes are arranged along the length direction on the first blade, m is an integer greater than or equal to 1, and each first long hole extends along the length direction and along The thickness direction of the first blade penetrates the first blade; and the connection assembly includes m connection members, each connection member being installed in a corresponding first long hole in a manner capable of sliding relative to the first blade. And one end of each connecting member is riveted on the second blade.

In some embodiments, each connecting member includes a connecting rod, a riveting portion connected to one end of the connecting rod and riveted with the second blade, and a first hat-shaped head connected to the other end of the connecting rod. Part, wherein the connecting rod passes through the corresponding first long hole, and the inner end surface of the first hat-shaped head facing the second blade is fastened to the first blade away from the second blade Outside face.

In some embodiments, the first long hole is a stepped hole, and is formed by a narrow hole portion having a smaller size in a width direction of the blade assembly and a portion of the narrow hole portion remote from the second blade. It is composed of a wide hole portion having a larger size in an outer side and a width direction of the blade assembly; and each connecting member includes a connecting rod, a riveting portion connected to one end of the connecting rod, and riveted with the second blade And a first hat-shaped head connected to the other end of the connecting rod, wherein the connecting rod passes through a narrow hole portion of a corresponding first long hole, and the first hat-shaped head is placed on a corresponding In the wide hole portion of the first long hole and the inner end surface of the first cap-shaped head facing the second blade is buckled on the bottom surface of the wide hole portion of the corresponding first long hole, and the first cap The outer end surface of the shaped head far from the second blade does not exceed the outer side of the first blade far from the second blade.

In some embodiments, n third long holes are further arranged along the length direction on the first blade, n is an integer greater than or equal to 1, and each third long hole extends along the length direction and The first blade is penetrated along the thickness direction of the first blade; n fourth long holes corresponding to the n third long holes are also arranged on the second blade along the length direction. Each fourth long hole extends along the length direction and penetrates the second blade along the thickness direction of the second blade; at one end in the length direction of the first blade and the second blade, respectively A transmission mating portion is provided; and the connection component further includes a fuselage end connection component, which is closer to the transmission mating portion than the connection member, and the fuselage end connection component includes a fixing plate , Gaskets, n bolts, n nuts, and n washers, wherein each washer is installed in the corresponding third long hole and fourth long hole, and the thickness of each washer is greater than the The total thickness of one blade and the second blade, The fixing plate and the gasket are arranged to sandwich the first and second blades and the n washers stacked together, and each bolt penetrates the fixing plate and the gasket And the corresponding washer to engage the corresponding nut.

In some embodiments, a tooth edge of each serration of the first edge portion and a tooth edge of each serration of the second edge portion are inclined in opposite directions with respect to the length direction.

In some embodiments, a tooth edge of each serration of the first edge portion and a tooth edge of each serration of the second edge portion are inclined toward the same direction relative to the length direction.

In some embodiments, the first interval is smaller than the third interval and smaller than the fourth interval, and the second interval is smaller than the third interval and smaller than the fourth interval.

In some embodiments, a convex surface is disposed on at least one of the first blade and the second blade facing each other.

In some embodiments, the first blade portion and the third blade portion respectively extend over the entire working length of two sides opposite to each other in the width direction of the first blade, and the second blade portion and the The fourth blade portion extends over the entire working length of the second blade on opposite sides in the width direction.

According to another aspect of the present invention, there is provided a tool including the above blade assembly, wherein the tool includes a means for driving the first blade and the second blade to reciprocate in the length direction relative to each other. Drive mechanism.

In some embodiments, the driving mechanism includes a dual cam driving block, a center of the dual cam driving block is connected to a power output element of the tool, and the dual cam driving block has a transmission respectively with the first blade. The mating portion and the transmission mating portion of the second blade are mated with two offset cams.

In some embodiments, the two cams of the dual cam drive block are offset by 180 °.

The invention is innovated on the basis of the traditional reciprocating saw and its blade assembly. The blade assembly of the present invention is not a single blade of a traditional reciprocating saw, but a double-blade structure with upper and lower compound double saw teeth. The blade on one side of the blade is composed of saw teeth, and the upper and lower saw teeth move relative to each other without idle stroke, which greatly improves the sawing efficiency; the other edge of the first blade and the second blade are composed of scissors teeth, so that The manual tool has both the cutting function of the reciprocating saw and the pruning function of the pruning machine, which expands the functions of the traditional reciprocating saw and realizes one machine for multiple uses.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing an overall structure of a tool according to a first embodiment of the present invention;

2 is an exploded perspective view showing a structure of a blade assembly according to a first embodiment of the present invention;

3A is a side sectional view showing a blade assembly according to a first embodiment of the present invention and a partial enlarged view thereof, and FIG. 3B is a plan view showing the blade assembly according to the first embodiment of the present invention;

4A is a side sectional view showing a blade assembly according to a second embodiment of the present invention and a partial enlarged view thereof, and FIG. 4B is a top view showing the blade assembly according to the second embodiment of the present invention;

5A is a side sectional view showing a blade assembly according to a third embodiment of the present invention and a partial enlarged view thereof, and FIG. 5B is a top view showing the blade assembly according to the third embodiment of the present invention; and

6A is a side sectional view showing a blade assembly according to a fourth embodiment of the present invention and a partial enlarged view thereof, and FIG. 6B is a plan view showing the blade assembly according to the fourth embodiment of the present invention.

detailed description

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. Throughout the drawings, similar parts and structures are denoted by similar reference numerals.

First embodiment

FIG. 1 shows the overall structure of a tool according to a first embodiment of the present invention. As shown in FIG. 1, the tool is a portable tool, and is mainly composed of a blade assembly 2 and a main body 1. The fuselage 1 mainly includes a handle portion 11 and a casing portion 12. Among them, a switch control member such as a trigger is provided on the handle portion 11. A driving mechanism (not shown) for driving the blade assembly 2 and a power machine (not shown) for powering the driving mechanism are provided in the casing portion 12. The power machine may be a motor, an engine, or a pneumatic machine. When the power machine is a motor, a battery (such as a storage battery or a dry battery) for supplying power to the motor is also provided in the fuselage 1. The blade assembly 2 is connected to a driving mechanism in the casing portion 12 of the main body 1. As shown in FIG. 1, the length direction of the blade assembly 2 is also the length direction of the entire tool.

FIG. 2 is an exploded perspective view showing the structure of the blade assembly 2 according to the first embodiment. 3A and 3B are a side sectional view and a top view, respectively, of the blade assembly 2 according to the first embodiment. In addition, a dual cam driving block 29 as a part of the driving mechanism is also shown in FIGS. 2, 3A, and 3B. As shown in FIGS. 2, 3A, and 3B, the blade assembly 2 includes a first blade 24, a second blade 23, and a connection assembly. Both the first blade 24 and the second blade 23 are substantially elongated plate members, and both extend along the length direction of the blade assembly 2 (that is, the left-right direction in FIGS. 3A and 3B). In other words, the length direction of the blade assembly 2 is also The longitudinal direction of the first blade 24 and the second blade 23. A connection assembly (to be described in detail below) stacks the first blade 24 and the second blade 23 in a manner that allows the first blade 24 and the second blade 23 to reciprocate in the length direction of the blade assembly 2 relative to each other. connect them. It should be understood by those skilled in the art that the “stacking” referred to here is not limited to the sides of the first blade 24 and the second blade 23 that are opposite to each other in the thickness direction (that is, the up-down direction in FIG. 3A) (relative to The inner side of the blade assembly 2 is completely in contact with each other, and the side of the first blade 24 and the second blade 23 facing each other is only partially contacted, and the first blade 24 and the second blade 23 are opposite each other. Case where the sides are separated by a certain distance.

As shown in FIGS. 2 and 3B, a first blade portion 241 and a third blade portion 243 are integrally formed on opposite sides in the width direction of the first blade 24, respectively. A second blade portion 232 and a fourth blade portion 234 are integrally formed on opposite sides, respectively. In a state where the first blade 24 and the second blade 23 in the blade assembly 2 are stacked on each other, the first blade portion 241 of the first blade 24 is disposed on a side corresponding to the second blade portion 232 of the second blade 23 ( The lower side in FIG. 3B), and the third blade portion 243 of the first blade 24 is disposed on a side (upper side in FIG. 3B) corresponding to the fourth blade portion 234 of the second blade 23. The first blade portion 241 and the second blade portion 232 are respectively formed by a set of continuous serrations extending in the length direction of the blade assembly 2, and the third blade portion 243 and the fourth blade portion 234 are respectively formed in the length direction of the blade assembly 2. A set of discontinuous scissors teeth (also called shear teeth). Therefore, when the first blade 24 and the second blade 23 are reciprocated along the length direction of the blade assembly 2 relative to each other under the driving of the driving mechanism, the first blade portion 241 and the second blade portion 232 can cooperate with each other to have a saw The cutting operation function, and the third blade portion 243 and the fourth blade portion 234 can cooperate with each other to have a cutting function (also called pruning). Thereby, the tool equipped with the blade assembly 2 according to this embodiment can serve as a double saw blade reciprocating saw and a reciprocating pruning shear at the same time, and the user does not need to replace the blade assembly 2 and can complete the trimming with only one tool The two tasks of sawing and cutting expand the functions of the traditional reciprocating saw, which greatly facilitates the user. In addition, compared with the conventional reciprocating saw, since the first blade portion 241 of the first blade 24 and the second blade portion 232 of the second blade 23 are formed of saw teeth, the first blade portion 241 and the second blade portion 232 cooperate with each other to It has a sawing function. During operation, the saw teeth of the two

blade portions

241 and 232 move relative to each other without idle stroke, which greatly improves the sawing efficiency.

The teeth of the first blade portion 241 and the second blade portion 232 may be any teeth suitable for performing a sawing operation. Specifically, in this embodiment, as shown in FIG. 2 and FIG. 3B, each saw tooth of the first blade portion 241 is close to the side of the fuselage (the right side in FIG. 3B, hereinafter also referred to as the “body side ”) A straight edge substantially parallel to the width direction of the first blade 24 and the side of the blade head near the blade assembly 2 (the left side in FIG. 3B, hereinafter also referred to as“ the blade side ”) and the first blade The tooth edges (or cutting edges) inclined in the width direction of 24 are formed, and there is a first interval D1 between adjacent saw teeth. Each of the serrations of the second blade portion 232 is composed of a straight edge substantially parallel to the width direction of the second blade 23 on the blade side and a tooth edge on the body side, and there is a second interval D2 between adjacent serrations.

When the first blade 24 and the second blade 23 are mounted together, the tooth edge of each serration of the first blade portion 241 and the tooth edge of each serration of the second blade portion 232 are inclined in opposite directions with respect to the length direction. . For example, the tooth edge of the first blade portion 241 is inclined toward the cutter head side, and the tooth edge of the second blade portion 232 is inclined toward the body side.

In this way, when the blade assembly 2 is in operation, one of the first blade portion 241 and the second blade portion 232 always performs active sawing, and the other blade portion and the active sawn blade portion can be sawed. The workpiece is sheared. According to material mechanics, it is known that the tensile stress of a general material is greater than its shear stress, so the shearing effect of the first blade portion 241 and the second blade portion 232 can more easily complete the sawing work. In addition, the first blade 24 and the second blade 23 reciprocate relative to each other, so that the sawing efficiency of the blade assembly 2 of the double-blade structure is much higher than that of the single blade, and at the same time, the vibration is much smaller than that of the single blade. This is because the feed amount of the active saw blade is limited by the other blade, so the working resistance is relatively stable, and the vibration of the internal system of the tool can be partially offset by the reciprocating movement of the two blades.

It should be understood by those skilled in the art that according to specific use requirements, when the first blade 24 and the second blade 23 are installed together, each tooth of each serration of the first blade portion 241 and each of the second blade portion 232 The serrated tooth edges may also be designed to be inclined toward the same direction relative to the length direction; or each of the serrations of the first blade portion 241 and the second blade portion 232 may be formed into an isosceles triangle shape, and the Both equal sides are formed as tooth edges.

The third blade portion 243 is a group of non-continuous scissors teeth extending along the length of the first blade 24. Each scissors tooth is formed into an isosceles triangle shape with an apex angle at an acute angle, and adjacent scissors teeth are spaced apart by a flat portion. And there is a third interval D3 between adjacent scissors teeth. In addition, the fourth blade portion 234 is a non-continuous scissors tooth extending along the length direction of the second blade 23, and each scissors tooth is formed into a strip shape having an enlarged portion at the end, and adjacent scissors teeth are spaced apart by a flat portion. And there is a fourth interval D4 between adjacent scissors teeth. The first interval D1 is smaller than the third interval D3 and smaller than the fourth interval D4, and the second interval D2 is smaller than the third interval D3 and smaller than the fourth interval D4. In this embodiment, the second interval D2 is slightly larger than the first interval D1, and the D3 interval is equal to D4.

In addition, as shown in FIGS. 1 and 2, the first blade portion 241 and the third blade portion 243 respectively extend over the entire working length on opposite sides of the first blade 24 in the width direction, and the second blade portion 232 and The fourth blade portion 234 extends over the entire working length on the opposite sides of the second blade 23 in the width direction, respectively. In other words, the first blade portion 241 and the third blade portion 243 respectively extend over the entire length of the work piece on both sides of the first blade 24, and the second blade portion 232 and the fourth blade portion 234 are on the second blade, respectively. 23 on both sides can extend the entire length of the work. In general, the working lengths on both sides of the first blade 24 and the working lengths on the two sides of the second blade 23 are substantially the same as each other (the difference between them does not exceed 10%). Therefore, the lengths of the first to fourth blade portions are substantially the same (for example, , Within ± 5% of the average length of the first to fourth cutting edges). That is, the arrangement length of the serrations of the first blade portion 241 and the second blade portion 232 is substantially the same as the arrangement length of the scissors teeth of the third blade portion 243 and the fourth blade portion 234. In this way, a sufficient working length can be guaranteed for both different jobs, such as trimming and sawing.

Those skilled in the art should understand that the serrations, scissors teeth, and blades in the blade assembly can all adopt shapes different from those shown in the embodiments and the accompanying drawings. Those skilled in the art can design each blade according to actual needs. As long as the corresponding blade can cooperate to realize the sawing and trimming functions, various designs are feasible, and the saw can be realized without replacing the blade assembly. Cut and trim two functions to achieve multiple functions in one machine.

In addition, a convex surface 231 is arranged on at least one of the side surfaces of the first blade 24 and the second blade 23 facing each other in the length direction. In this embodiment, as shown in FIG. 2, the number of the protruding surfaces 231 is three, and protrudes from the side (inner side) of the second blade 23 facing the first blade 24 toward the first blade 24. The convex surface 231 can ensure that a predetermined gap is always maintained on the side of the first blade 24 and the second blade 23 facing each other, thereby preventing the first blade 24 and the second blade 23 from reciprocating relative to each other due to vibration and the like. Collisions between serrations or scissors.

Each of the first blade 24 and the second blade 23 is close to the end of the fuselage 1 in the length direction (the right end in FIGS. 2 and 3A, hereinafter may be referred to as the “body end”) integrally formed with the drive Mechanism mating transmission mating portion 260. As shown in FIG. 2, the transmission fitting portion 260 is a plate-shaped member with a waist-shaped hole in the center. The transmission fitting portion 260 is used to engage the double cam driving block 29 to be described later to reciprocate the first blade 24 and the second blade 23 in the length direction relative to each other.

The connection assembly of the blade assembly 2 includes a fuselage end connection assembly that is closer to the fuselage 1 (ie, closer to the transmission fitting portion 260) in the length direction of the blade assembly 2 and a cutter head end that is closer to the cutter head than the fuselage end connection assembly. Connect the components. In this embodiment, the cutter head end connection assembly includes two connection members (connection pins) 25a. As shown in a partially enlarged cross-sectional view in the upper left corner of FIG. 3A, each connecting member 25a includes a connecting rod 253a and a first hat-shaped head 251a and a second hat-shaped head 252a integrally connected to both ends of the connecting rod 253a. The two cap-shaped

heads

251a, 252a have a substantially trapezoidal cross-sectional shape that is symmetrical to each other. Those skilled in the art can understand that the distance between the two cap-shaped

heads

251a, 252a is slightly larger than the total thickness of the first blade 24 and the second blade 23 stacked together (including the convex surface 231 from the second blade 23 protruding height), so as to limit the movable gap between the first blade 24 and the second blade 23 so as not to hinder the relative movement between the first blade 24 and the second blade 23. As shown in FIGS. 2 and 3A, corresponding to the two connecting members 25 a, two first long holes 246 a are arranged in the first blade 24 along the length direction thereof. Each of the first long holes 246 a extends in the length direction of the first blade 24 and penetrates the first blade 24 in the thickness direction of the first blade 24. Each of the first long holes 246a is formed in a spoon-like (or key-like) shape formed by combining a large-diameter enlarged hole portion 246ak on the blade side and a long hole portion 246ac on the body side. Meanwhile, two second long holes 236a corresponding to the aforementioned two first long holes 246a are respectively arranged along the length direction of the second blade 23, and each second long hole 236a extends along the length direction of the second blade 23 The second blade 23 penetrates the second blade 23 in a thickness direction thereof. The second long hole 236a is formed into a spoon-like shape formed by combining the large-diameter enlarged hole portion 236ak on the body side and the long hole portion 236ac on the blade side. In addition, the diameter of the enlarged portion 246ak of the first long hole 246a and the enlarged portion 236ak of the second long hole 236a are slightly larger than the diameters of the first and second hat-shaped

heads

251a and 252a, respectively, and the first length The dimensions of the long hole portions of the hole 246a and the second long hole 236a in the width direction are smaller than the diameters of the first cap-shaped head portion 251a and the second cap-shaped head portion 252a and slightly larger than the diameter of the connecting rod 253a.

When the connecting member 25a is installed, the reamer portion 246ak of the first long hole 246a on the first blade 24 and the reamer portion 236ak of the corresponding second long hole 236a on the second blade 23 are exactly aligned. Then, the connecting member 25a is passed through the reamer portion 246ak and the reamer portion 236ak, and then the first blade 24 is moved in the length direction relative to the second blade 23, so that the connecting rod 253a of the connecting member 25a is slid to the first The long hole portion 246ac of the long hole 246a and the long hole portion 236ac of the second long hole 236a are at positions. At this time, the inner end surface of the first hat-shaped head 251a facing the second blade 23 (the lower end surface of the first hat-shaped head 251a in FIG. 3A) is buckled on the outer side of the first blade 24 away from the second blade 23 ( On the upper side of the first blade 24 in FIG. 3A), correspondingly, the inner end surface of the second cap-shaped head 252 a facing the first blade 24 is buckled on the outer surface of the second blade 23 away from the first blade 24. In this manner, the connecting member 25a connects the first blade 24 and the second blade 23 together while allowing the first blade 24 and the second blade 23 to reciprocate in a length direction with respect to each other, and can restrict the first blade 24 and The second blade 23 is excessively separated during operation. In addition, since the inner end surfaces of the first cap-shaped head portion 251a and the second cap-shaped head portion 252a of the connecting member 25a are fastened to the outer surfaces of the first blade 24 and the second blade 23, respectively, the first cap-shaped head portion 251a The second blade-shaped head portion 252 a is integrally protruded from the outer surface of the first blade 24 and the second blade 23 is integrally protruded from the outer surface. This structure has the advantages of simple manufacturing and high blade strength, and is suitable for working environments that do not require the blade assembly as a whole to cross the saw seam or that the saw seam will naturally open during the sawing process. For example, the cutter head end connection assembly according to the present embodiment can be used in a high branch machine, because after the branches are sawed, under the action of the branch's own gravity, the saw seam will continuously open, and the connection member 25a will not be opened. The hat-shaped head causes obstruction.

The fuselage end connection assembly includes a fixing plate 21, a bolt 22, a washer 26, a washer 27, and a nut 28. As shown in FIG. 2, the number of bolts 22, washers 26, and nuts 28 is two. Correspondingly, two third long holes 248 are arranged on the first blade 24 in the length direction, and each third long hole 248 extends in the length direction and penetrates the first blade 24 in the thickness direction of the first blade 24. Two second long holes 238 corresponding to the two third long holes 248 are arranged on the second blade 23 along the length direction, and each fourth long hole 238 extends in the length direction and along the thickness of the second blade 23 The direction penetrates the second blade 23. A washer 26 is installed in each of the third long hole 248 and the corresponding fourth long hole 238, and the thickness of each washer 26 is greater than the total thickness of the first blade 24 and the second blade 23 stacked together, thereby defining a first A movable gap between one blade 24 and the second blade 23. The fixing plate 21 is a mounting substrate of the blade assembly 2 and is also a fixed connection plate between the blade assembly 2 and the main body 1. The fixing plate 21 and the washer 27 are arranged to sandwich the first blade 24 and the second blade 23 and the two washers 26 stacked together, and the fixing plate 21 and the washer 27 are provided with two bolts 22 respectively. Through the through holes, each bolt 22 passes through the through hole of the fixing plate 21, the corresponding washer 26 and the through hole of the washer 27, so as to be engaged with the corresponding nut 28. The nut 28 is preferably a self-locking nut. In this way, the fuselage end connection assembly can allow the first blade 24 and the second blade 23 to reciprocate in a length direction relative to each other, and at the same time, can connect and stack the first blade 24 and the second blade 23 together.

As shown in FIG. 2, the driving mechanism for driving the first blade 24 and the second blade 23 to reciprocate along the length direction of the blade assembly 2 with respect to each other includes a dual cam driving block 29, and the center and driving of the dual cam driving block 29 Power output elements (not shown) such as gears are connected. The double cam driving block 29 includes a cam shaft 291 and an upper cam 292 and a lower cam 293 formed on the cam shaft 291 so as to be offset from each other. In other words, as shown in FIG. 3B, the upper cam 292 and the lower cam 293 are convex toward different directions. Preferably, the upper cam 292 and the lower cam 293 are offset from each other by 180 degrees. When the dual cam driving block 29 is installed in the transmission mating portion 260, the upper cam 292 is engaged with the inner side of the waist-shaped hole of the transmission mating portion of the first blade 24, and the lower cam 293 is engaged with the transmission mating portion of the second blade 23 The inside of the waist-shaped hole fits. When the power machine is started, the power output element connected to the power machine drive drives the dual cam drive block 29 to rotate, so that the upper cam 292 and the lower cam 293 drive the first blade 24 and the second blade 23 relative to each other along the length direction of the blade assembly 2. Dislocated back and forth motion.

Second embodiment

A second embodiment of the present invention is described below with reference to FIGS. 4A and 4B. The blade assembly in the second embodiment is similar to the first embodiment, and the same parts as those in the first embodiment will not be described repeatedly in the following.

As shown in FIGS. 4A and 4B, in this embodiment, the first long hole 246b is a stepped hole, and is formed by a narrow hole portion 2461b having a smaller size in the width direction of the blade assembly 2 and a narrow hole portion 2461b located in the narrow hole portion 2461b. The wide hole portion 2462b, which is far from the outside of the second blade 23 and has a larger size in the width direction of the blade assembly 2, is composed. Similarly, the second long hole 236b is also a stepped hole, and is formed by a narrow hole portion 2361b having a smaller size in the width direction of the blade assembly 2 and an outer side of the narrow hole portion 2361b away from the first blade 24 and at the blade assembly. 2 is composed of a wide hole portion 2362b having a larger size in the width direction. Preferably, the narrow hole portion 2461b and the narrow hole portion 2361b are formed in a spoon-like shape formed by combining the enlarged hole portion and the long hole portion as described above, and the wide hole portion 2462b and the wide hole portion 2362b are formed in a waist shape. .

In this embodiment, each connecting member 25b includes a connecting rod 253b and a first hat-shaped head 251b and a second hat-shaped head 252b integrally connected to both ends of the connecting rod 253b. At the time of installation, similar to the connecting member 25a of the first embodiment, the connecting member 25b is first passed through the enlarged hole portion of the aligned narrow hole portion 2461b and the enlarged hole portion of the narrow hole portion 2361b, and then the first blade 24 is moved in the length direction relative to the second blade 23, so that the connecting rod 253b of the connecting member 25b slides to the narrow hole portion of the narrow hole portion 2461b of the corresponding first long hole 246b and the narrowness of the corresponding second long hole 236b. At the position in the long hole portion of the hole portion 2361b. At this time, the first cap-shaped head 251b is placed in the wide hole portion 2462b of the corresponding first long hole 246b, and the inner end surface of the first cap-shaped head 251b facing the second blade 23 is buckled in the corresponding first long hole. The wide hole portion 246b of the 246b is on the bottom surface, and the outer end surface of the first cap-shaped head portion 251b far from the second blade 23 does not exceed (below or flush with) the outer side of the first blade 24 far from the second blade 23. . Similarly, the second cap-shaped head portion 252b is placed in the wide-hole portion 2362b of the corresponding second long hole 236b, and the inner end surface of the second cap-shaped head 252b facing the first blade 24 is buckled to the bottom surface of the wide-hole portion 2362b. And the outer end surface of the second cap-shaped head portion 252b far from the first blade 24 does not exceed the outer side surface of the second blade 23 far from the first blade 24. Preferably, both the inner and outer end faces of the first cap-shaped head 251b and the inner and outer end faces of the second cap-shaped head 252b are flat surfaces. Since the outer ends of the cap-shaped

heads

251b and 252b of the connecting member 25b do not exceed the outer sides of the

corresponding blades

23 and 24 in the blade-end connection assembly, the connecting member and the workpiece are avoided during trimming and sawing Interference occurs. Therefore, this structure has the advantages of wide adaptability and the sawing work can be completed in all occasions.

Third embodiment

A second embodiment of the present invention is described below with reference to FIGS. 5A and 5B. The blade assembly in the third embodiment is similar to the first embodiment, and the same parts as those in the first embodiment will not be described repeatedly in the following.

As shown in FIG. 5A and FIG. 5B, in this embodiment, two first long holes 246c are arranged along the length direction at the tip end of the first blade 24, and each first long hole 246c extends along the length direction and The thickness direction of the first blade 24 penetrates the first blade 24. Preferably, the first long hole 246c is formed similarly to the aforementioned first long hole 246a into a spoon-like shape formed by combining the enlarged hole portion and the long hole portion. The second blade 23 is provided with a riveting hole at a position corresponding to the first long hole 246c for a riveting head end connection assembly.

In this embodiment, the cutter head end connection assembly includes two connection members 25c, and each connection member 25c includes a connection rod 253c, a rivet portion 252c integrally formed on one end of the connection rod 253c, and a connector integrally connected to the connection rod 253c. The first cap-shaped head 251c at the other end. The riveting portion 252c is riveted to the second blade 23 through the riveting hole of the second blade 23, the connecting rod 253c passes through the corresponding first long hole 246c, and the first cap-shaped head 251c faces the inner end surface of the second blade 23 It is fastened on the outer surface of the first blade 24 away from the second blade 23. In this way, one end of each connecting member 25c is fixed to the second blade 23 and the other end can slide relative to the first blade 24, and at the same time, it is possible to prevent the first blade 24 and the second blade 23 from being excessively separated by the first cap-shaped head 251c. Preferably, after the riveting portion 252c of the connecting member 25c is riveted to the second blade 23, the outer end surface of the riveting portion 252c does not exceed the outer side of the second blade 23 away from the first blade 24. The advantages of this structure are stable installation and high blade strength.

Fourth embodiment

A fourth embodiment of the present invention is described below with reference to FIGS. 6A and 6B. The blade assembly in the fourth embodiment is similar to the first embodiment, and the same parts as those in the first embodiment will not be described repeatedly in the following.

As shown in FIG. 6A and FIG. 6B, in this embodiment, two first long holes 246d are arranged along the length direction of the blade end of the first blade 24, and each first long hole 246d is a stepped hole, and is formed by A narrow hole portion 2461d having a smaller size in the width direction of the blade assembly 2 and a wide hole portion 2462d located on the outside of the narrow hole portion 2461d away from the second blade 23 and having a larger size in the width direction of the blade assembly 2 . Preferably, the narrow hole portion 2461d is formed in a spoon-like shape formed by combining the enlarged hole portion and the long hole portion as described above, and the wide hole portion 2462d is formed in a waist shape. The second blade 23 is provided at a position corresponding to the first long hole 246d with a riveting hole for a riveting cutter head end connection component.

In this embodiment, the cutter head end connection assembly includes two connection members 25d, each connection member 25d includes a connection rod 253d, a riveting portion 252d integrally formed on one end of the connection rod 253d, and a connection integrally connected to the connection rod 253d. The first hat-shaped head 251d at the other end. The riveting portion 252d is riveted to the second blade 23 through the riveting hole of the second blade 23, and the connecting rod 253d passes through the narrow hole portion 2461d of the corresponding first long hole 246d. The first hat-shaped head 251d is placed in the wide hole portion 2462d of the corresponding first long hole 246d and the inner end surface of the first hat-shaped head 251d facing the second blade 23 is buckled by the width of the corresponding first long hole 246d. The bottom surface of the hole portion 2462d, and the outer end surface of the first cap-shaped head portion 251d remote from the second blade 23 does not exceed the outer surface of the first blade 24 remote from the second blade 23. Preferably, after the riveting portion 252d of the connecting member 25d is riveted to the second blade 23, the outer end surface of the riveting portion 252d does not exceed the outer side of the second blade 23 away from the first blade 24. The advantage of this structure is the stable installation, which avoids the interference between the connecting parts and the workpiece during the trimming and sawing process, and has wide adaptability.

Variant

Although various embodiments of the present invention have been specifically described above, the present invention is not limited to these embodiments. Those skilled in the art can make various modifications and variations to these embodiments within the scope of the present invention.

Although in the above embodiment, the number of the connecting members, bolts, nuts, and washers is two, and the number of the long holes on the blades mating with the connecting members and the long holes with the bolts, nuts, and washers are two, however , You can also choose the number of the above components according to actual needs.

Although the cutter head end connection assembly is a connection member (connecting pin) in the above-mentioned embodiment, the cutter head end connection assembly may also be other parts having a clamping and sliding function. In addition, the connection components in different embodiments may be included in a blade-end connection assembly.

Although in the above embodiment, the first long hole, the second long hole, or the narrow hole portion thereon is formed into a spoon-like (or key-like) shape formed by combining a large-diameter enlarged hole portion and a long hole portion, Those skilled in the art should understand that the large-diameter reaming portion is provided for the cap-shaped head of the connecting component to pass through the long hole. For example, a combination connection member is used (for example, the cap head of the connection member is screwed to the connection rod), or the connection member has a large diameter cap head only at one end so that the cap head can be connected without passing through a long hole. When the components are in place, the long and narrow holes mentioned above may also be simple long holes (such as waist holes, rectangular holes, or oval holes).

Although in the above embodiment, the hat-shaped head has a substantially trapezoidal cross-sectional shape, the hat-shaped head may have a semi-circular, arcuate, rectangular, or other cross-sectional shape. In addition, the shape of the hat-shaped head in a plan view is not limited to a circle, but may be oval, rectangular, or waist-shaped.

Although one end of the connecting member is riveted in the riveting hole of the blade in the third and fourth embodiments described above, one end of the connecting member may be fixed to the blade by other means such as welding.

Although the first blade and the second blade are integrally formed with the respective transmission mating portions in the above-mentioned embodiment, the first blade and the second blade may be separated from the respective transmission mating portions and assembled by fasteners together.

Although the two cams of the dual cam driving block are offset by 180 ° in the above embodiment, the two cams may be offset by other angles.

Although in the above-mentioned embodiment, the connection assembly includes a blade-end connection assembly (connecting member) and a fuselage-end connection assembly, in the case of ensuring stable operation of the blade assembly, the connection assembly may include only the blade-end connection assembly and One of the fuselage-side connection components. When only the fuselage-side connection component is included, the length of the spacer and the fixing plate can be appropriately extended. In the case where only the blade-end connection assembly is included, a device for holding each blade can be added to the fuselage.

Although in each of the above embodiments, the driving mechanism includes a dual cam driving block, and the first blade and the second blade are respectively provided at the body end with a transmission mating portion that cooperates with two cams on the dual cam driving block, The rotation of the cam drive block reciprocates the first blade and the second blade. However, the blade can also be reciprocated by other mechanisms, such as a crank slider mechanism, a crank link mechanism, or an extension that cooperates with a dual cam drive block. Reciprocating platform outside the fuselage. In the case of a reciprocating platform, the first blade and the second blade can be fixed directly through the reciprocating platform.

Although in the above-mentioned embodiment, the convex surface on the blade is circular and arranged along the length direction, the convex surface may be of any suitable shape and arranged in any suitable form. It is not necessary to provide a convex surface. Optionally, in order to reduce the contact area between the first blade and the second blade, an additional through hole or groove may be opened on the opposite surface of the two blades, or a connecting rod or a washer of the connection component may be provided with The first blade is separated from the second blade by a spacer.

Although in the above embodiments, the blade assembly and the fuselage are connected together by a fixing plate, the blade assembly and the fuselage may be connected together by any other known means.

Although in the above embodiment, a battery is provided in the body of the tool, the tool may also be powered by mains power, or both battery and mains power.

Although in the above-mentioned embodiment, the tool is a portable tool, and the body of the tool includes a handle portion and a housing portion, the tool may also have other body structures, and may be a multi-function mounted on a workbench or a robot Processing tools.

The foregoing has provided some exemplary embodiments and modifications of the invention for the purposes of explanation and description. However, the foregoing description is not intended to be exhaustive or to limit the invention to the specific forms disclosed. Obviously, many modifications and variations can be made by those skilled in the art. For example, individual features may be arbitrarily combined, replaced, and omitted within the scope of the present invention. Therefore, the scope of protection of the present invention is limited only by the appended claims and their equivalents. Furthermore, the terms "substantially" and "approximately" as used throughout the specification and claims in the present invention indicate the degree to which a feature, property, state, or structure is complete or nearly complete. In some cases, the extent to which deviations are allowed from absolute completeness depends on the situation. However, in general, the degree of closeness should be such that the closeness results in an overall result that is absolutely identical or similar.

Claims

A blade assembly includes:

A first blade and a second blade, each of the first blade and the second blade extending along a length direction of the blade assembly, and first sides are respectively provided on opposite sides in a width direction of the first blade; A blade portion and a third blade portion; and a second blade portion and a fourth blade portion are respectively provided on opposite sides of the second blade in the width direction; and

A connection assembly that stacks and connects the first blade and the second blade in a manner that allows the first blade and the second blade to reciprocate in the length direction relative to each other;

It is characterized in that the first blade portion is composed of serrations arranged in the length direction, the second blade portion is composed of serrations arranged in the length direction, the first blade portion and the second blade The parts cooperate with each other to realize the sawing function;

The third blade portion is composed of scissors teeth arranged in the length direction, the fourth blade portion is composed of scissors teeth arranged in the length direction, and the third blade portion and the fourth blade portion are mutually Cooperate for trimming.
The blade assembly according to claim 1, wherein:

M first long holes are arranged along the length direction on the first blade, m is an integer greater than or equal to 1, and each first long hole extends along the length direction and along the first blade's A thickness direction runs through the first blade;

M second long holes corresponding to the m first long holes are respectively arranged along the length direction on the second blade, and each second long hole extends along the length direction and along the length direction A thickness direction of the second blade penetrates the second blade; and

The connection assembly includes m connection members, each connection member being installed in a corresponding first long hole and in a manner capable of allowing the first blade and the second blade to reciprocate in the length direction relative to each other. The second long hole.
The blade assembly according to claim 2, wherein:

Each connecting member includes a connecting rod and a first hat-shaped head and a second hat-shaped head connected to both ends of the connecting rod, wherein the connecting rod passes through the corresponding first and second long holes. An inner end surface of the first hat-shaped head facing the second blade is buckled on an outer surface of the first blade facing away from the second blade, and the second hat-shaped head faces the The inner end surface of the first blade is buckled on the outer surface of the second blade remote from the first blade.
The blade assembly according to claim 2, wherein:

The first long hole is a stepped hole, and includes a narrow hole portion having a smaller size in a width direction of the blade assembly and an outer side of the narrow hole portion remote from the second blade and on the blade. It is composed of a wide hole with a larger size in the width direction of the module;

The second long hole is a stepped hole, and includes a narrow hole portion having a smaller size in a width direction of the blade assembly and an outer side of the narrow hole portion remote from the first blade and on the blade. It is composed of a wide hole portion having a larger size in the width direction of the module; and

Each connecting member includes a connecting rod, and a first hat-shaped head and a second hat-shaped head connected to both ends of the connecting rod, and the connecting rod passes through the corresponding narrow hole portion of the first long hole and the corresponding The narrow hole portion of the second long hole, the first cap-shaped head is placed in the wide hole portion of the corresponding first long hole and the inner end face of the first hat-shaped head faces the second blade On the bottom surface of the wide hole portion of the corresponding first long hole, and the outer end surface of the first hat-shaped head far from the second blade does not exceed the outer surface of the first blade far from the second blade Side; the second hat-shaped head is placed in the wide hole portion of the corresponding second long hole and the inner end surface of the second hat-shaped head facing the first blade is buckled in On the bottom surface, the outer end surface of the second hat-shaped head far from the first blade does not exceed the outer side of the second blade far from the first blade.
The blade assembly according to claim 1, wherein:

M first long holes are arranged along the length direction on the first blade, m is an integer greater than or equal to 1, and each first long hole extends along the length direction and along the first blade's A thickness direction penetrates the first blade; and

The connection assembly includes m connection members, each connection member being installed in a corresponding first long hole in a manner capable of sliding relative to the first blade, and one end of each connection member is riveted to the second blade .
The blade assembly according to claim 5, wherein:

Each connecting member includes a connecting rod, a riveting portion connected to one end of the connecting rod and riveted with the second blade, and a first cap-shaped head connected to the other end of the connecting rod, wherein the The connecting rod passes through the corresponding first long hole, and the inner end surface of the first hat-shaped head facing the second blade is buckled on the outer surface of the first blade remote from the second blade.
The blade assembly according to claim 5, wherein:

The first long hole is a stepped hole, and includes a narrow hole portion having a smaller size in a width direction of the blade assembly and an outer side of the narrow hole portion remote from the second blade and on the blade. It is composed of a wide hole portion having a larger size in the width direction of the module; and

Each connecting member includes a connecting rod, a riveting portion connected to one end of the connecting rod and riveted with the second blade, and a first cap-shaped head connected to the other end of the connecting rod, wherein the The connecting rod passes through the narrow hole portion of the corresponding first long hole, the first hat-shaped head is placed in the wide hole portion of the corresponding first long hole and the first hat-shaped head faces the first The inner end surfaces of the two blades are buckled on the bottom surface of the wide hole portion of the corresponding first long hole, and the outer end surface of the first hat-shaped head far from the second blade does not exceed the distance of the first blade. The outer surface of the second blade is described.
The blade assembly according to any one of claims 2 to 7, wherein:

N third long holes are arranged along the length direction on the first blade, n is an integer greater than or equal to 1, each third long hole extends along the length direction and along the first blade A thickness direction runs through the first blade;

N second long holes corresponding to the n third long holes are also arranged along the length direction on the second blade, each fourth long hole extending along the length direction and along A thickness direction of the second blade passes through the second blade;

A transmission fitting portion is respectively provided at one end in the length direction of the first blade and the second blade; and

The connection assembly further includes a fuselage end connection assembly, which is closer to the transmission mating portion than the connection member, and the fuselage end connection assembly includes a fixing plate, a gasket, and n bolts. , N nuts, and n washers, wherein each washer is installed in a corresponding third long hole and fourth long hole, and the thickness of each washer is greater than that of the first blade and the second blade stacked together The total thickness of the blade, the fixing plate and the spacer are arranged to sandwich the first and second blades and the n washers stacked together, and each bolt penetrates the fixing Plate, said washer, and corresponding washer so as to engage with the corresponding nut.
The blade assembly according to any one of claims 1 to 8, wherein a tooth edge of each serration of the first edge portion and a tooth edge of each serration of the second edge portion are opposite to each other. The length directions are inclined in opposite directions.
The blade assembly according to any one of claims 1 to 8, wherein a tooth edge of each serration of the first edge portion and a tooth edge of each serration of the second edge portion are opposite to each other. The length directions are inclined toward the same direction as each other.
The blade assembly according to any one of claims 1 to 10, wherein

The serrations on the first blade portion are arranged at a first interval along the length direction, the serrations on the second blade portion are arranged at a second interval along the length direction, and the scissors teeth on the third blade portion Arranged at a third interval along the length direction, and scissors teeth on the fourth blade portion are arranged at a fourth interval along the length direction, and,

The first interval is smaller than the third interval and smaller than the fourth interval, and the second interval is smaller than the third interval and smaller than the fourth interval.
The blade assembly according to any one of claims 1 to 11, wherein:

A convex surface is disposed on at least one of the first blade and the second blade facing each other.
The blade assembly according to any one of claims 1 to 12, wherein:

The first blade portion and the third blade portion respectively extend over the entire working length of the two sides opposite to each other in the width direction of the first blade, and the second blade portion and the fourth blade portion are respectively The second blade extends over the entire working length on opposite sides in the width direction.
A tool comprising a blade assembly according to any one of claims 1 to 13, wherein

The tool includes a driving mechanism for driving the first blade and the second blade to reciprocate in the length direction relative to each other.
The tool according to claim 14, wherein:

The driving mechanism includes a dual cam driving block, a center of the dual cam driving block is connected to a power output element of the tool, and the dual cam driving block has a transmission fitting portion and the first blade respectively with the first blade. Two misaligned cams fitted by the two-blade transmission mating section.
The tool according to claim 15, wherein the two cams of the dual cam drive block are offset by 180 °.