WO2019238045A1 - 切割工具 - Google Patents

切割工具 Download PDF

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Publication number
WO2019238045A1
WO2019238045A1 PCT/CN2019/090730 CN2019090730W WO2019238045A1 WO 2019238045 A1 WO2019238045 A1 WO 2019238045A1 CN 2019090730 W CN2019090730 W CN 2019090730W WO 2019238045 A1 WO2019238045 A1 WO 2019238045A1
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WO
WIPO (PCT)
Prior art keywords
bottom plate
cutting tool
saw blade
cam
cam portion
Prior art date
Application number
PCT/CN2019/090730
Other languages
English (en)
French (fr)
Inventor
马一纯
陈锋
王勇
Original Assignee
苏州宝时得电动工具有限公司
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.)
Filing date
Publication date
Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Publication of WO2019238045A1 publication Critical patent/WO2019238045A1/zh

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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
    • B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/16—Hand-held sawing devices with circular saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/02—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of frames; of guiding arrangements for work-table or saw-carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B9/00—Portable power-driven circular saws for manual operation
    • B27B9/04—Guiding equipment, e.g. for cutting panels

Definitions

  • the invention relates to a cutting tool.
  • Cutting tools such as electric circular saws
  • the usual method is to place the bottom plate of the cutting tool on the workpiece, at the same time align the saw blade with the cutting line marked on the workpiece, and then push the cutting tool on the surface of the workpiece to cut.
  • the operator often cannot guarantee the cutting accuracy due to human factors, and the work efficiency is relatively low.
  • An existing solution is to use a guiding device for guiding.
  • a side of the bottom plate of the cutting tool parallel to the saw blade is pressed against the guiding surface of the guiding device, and then the cutting tool is moved to cut and ensure that This side of the bottom plate of the cutting tool always moves along the guide surface, which can avoid the problems of lower cutting accuracy and lower working efficiency caused by human factors.
  • this solution also has problems. Because the bottom plate of the cutting tool has a certain width and there is a certain distance between the saw blade and the side of the bottom plate, one cannot directly cut the guide surface of the guide device with the cutting marked on the workpiece.
  • the problem to be solved by the present invention is to provide a cutting tool with high cutting accuracy and convenient use.
  • the technical solution of the present invention is: a cutting tool for cutting in cooperation with a guide device, the guide device having a guide surface, the cutting tool including: a housing; a motor, housed in the shell A transmission mechanism connected to the motor for driving a saw blade having a saw blade plane; a bottom plate connected to the housing, the bottom plate including a first bottom plate having a first bottom surface, A second bottom plate with two bottom surfaces, the second bottom plate is provided with an abutting surface that is coplanar with the plane of the saw blade, and the abutting surface is used to cooperate with the guide surface;
  • the first base plate and the second base plate are movably connected by a cam connecting mechanism;
  • the cam connecting mechanism includes a cam portion abutting the second base plate, and the cam portion is rotatably connected to the first base plate.
  • a bottom plate; the cam portion rotates, drives the second bottom plate to move relative to the first bottom plate, and exposes the abutting surface.
  • the cam connecting mechanism includes a connecting shaft connected to the first base plate; the second base plate is provided with a through hole through which the connecting shaft passes, and the connecting shaft passes through the connecting plate.
  • the through hole is connected to the cam portion.
  • the connecting shaft is rotatably connected to the first base plate about its own axis, and the connecting shaft is fixedly connected to the cam portion through the through hole.
  • connection shaft is fixedly connected to the first base plate;
  • cam connection mechanism further includes a connection sleeve rotatably mated with the connection shaft, and the connection shaft passes through the through hole and the The connecting sleeve is fitted, and the cam portion is fixedly connected to the connecting sleeve.
  • the connecting shaft is configured as a bolt, and the connecting sleeve is configured as a nut.
  • a rotation axis of the cam portion is parallel to a rotation axis of the saw blade.
  • the cutting tool is further provided with a guiding device for guiding the second bottom plate to move relative to the first bottom plate in a direction perpendicular to the second bottom surface.
  • an extending direction of the through hole is configured to be perpendicular to the second bottom surface, and the guide device includes the through hole.
  • the cam portion is fixedly connected with an operation portion for a user to operate.
  • a holding device is provided between the first bottom plate and the second bottom plate, and the holding device is used to hold the first bottom surface of the first bottom plate and the second bottom plate of the second bottom plate.
  • the bottom faces are coplanar.
  • the holding device includes a spring, one end of the spring abuts the first bottom plate, and the other end of the spring abuts the second bottom plate.
  • the cutting tool provided by the present invention makes the second bottom plate move relative to the first bottom plate by the cam portion abutting the second bottom plate; on the one hand, the structural design of the cam portion is used to provide a second The force of the bottom plate movement and easy operation; on the other hand, the self-locking effect of the cam portion can keep the second bottom plate at a specific position relative to the first bottom plate when the abutting surface cooperates with the guide device;
  • a cutting tool the cutting tool includes: a housing; a motor housed in the housing; a transmission mechanism connected to the motor for driving a saw Blade, the saw blade has a saw blade plane; a bottom plate includes a first bottom plate and a second bottom plate movably connected, and the casing is connected to the first bottom plate;
  • the second bottom plate is provided with an abutment surface, and the first bottom plate and the second bottom plate are relatively moved to expose the abutment surface;
  • the cutting tool further includes a locking mechanism, the locking mechanism For keeping the abutting surface coplanar with the plane of the saw blade.
  • the locking mechanism includes a bolt and a nut that rotatably cooperates with the bolt; the bolt is fixedly connected to the first bottom plate, and the second bottom plate is provided with a bolt for the bolt to pass through. A through hole, the bolt passes through the through hole and cooperates with the nut.
  • the locking mechanism includes a bolt and a nut that rotates with the bolt; the nut is fixedly connected to the first bottom plate, and the second bottom plate is provided with a bolt for the bolt to pass through. A through hole, the bolt passes through the through hole and cooperates with the nut.
  • the locking mechanism includes a locking cam that abuts the second bottom plate in a direction perpendicular to the plane of the saw blade, and the locking cam is rotatably connected to the second On the floor.
  • the rotation axis of the locking cam is parallel to the plane of the saw blade.
  • the first base plate and the second base plate are relatively translated.
  • the cutting tool further includes a cam portion abutting the second bottom plate, and the cam portion is rotatably connected to the first bottom plate; the cam portion rotates to drive the cam portion The second bottom plate is translated relative to the first bottom plate.
  • a cutting tool for cutting in cooperation with a guide device the guide device having a guide surface
  • the cutting tool including: a housing; a motor, housed in a place Said housing; a transmission mechanism connected to said motor for driving a saw blade, said saw blade having a saw blade plane; a bottom plate, said bottom plate comprising a first bottom plate having a first bottom surface and a second bottom plate having a second bottom surface A bottom plate; wherein the housing is connected to the first bottom plate, and the second bottom plate is provided with an abutting surface that cooperates with the guide surface; The first bottom surface is supported by the guide device,
  • the cutting tool is further provided with a locking mechanism, which is used to keep the abutting surface coplanar with the plane of the saw blade when the abutting surface is matched with the guide surface.
  • the cutting tool provided by the present invention is provided with a locking mechanism to avoid the movable connection between the first base plate and the second base plate.
  • the abutting surface provided on the second base plate is kept relatively constant with the position relative to the first base plate.
  • FIG. 1 is a front perspective view of a cutting tool provided by the present invention
  • FIG. 2 is a rear perspective view of the cutting tool shown in FIG. 1.
  • Fig. 3 is a left perspective view of the cutting tool shown in Fig. 1.
  • FIG. 4 is a front view of the cutting tool in use, as shown in FIG. 1. At this time, the second bottom surface is located at a first position that is coplanar with the first bottom surface.
  • Fig. 5 is a partially exploded view of the bottom plate of the cutting tool shown in Fig. 1, where A-A shows a partially enlarged view of a cam portion.
  • FIG. 6 is a front perspective view of a bottom plate of the cutting tool shown in FIG. 1. At this time, the second bottom surface is located at a second position that is not coplanar with the first bottom surface.
  • FIG. 7 is a front view of a use state of the cutting tool shown in FIG. 1.
  • the second bottom surface is located at a second position that is not coplanar with the first bottom surface.
  • FIG. 8 shows a schematic diagram of a locking mechanism according to another embodiment of the present invention.
  • the locking mechanism acts on the second bottom plate
  • 8b is the second position
  • the locking mechanism A schematic diagram of the mechanism acting on the second floor.
  • an electric circular saw is used as an example to explain the creative concept of the present invention.
  • the cutting tool of the present invention is not limited to an electric circular saw, but may also be other portable power tools in particular.
  • directional terms such as front, rear, left, right, up, and down, are relative to the direction in which the power tool shown in FIG. 1 is normally used. The forward direction is forward, and the direction opposite to the forward direction of the power tool is backward.
  • the present invention provides an electric circular saw 1 including a housing 20, a motor (not shown) housed in the housing 20, and a saw driven by a motor through a transmission mechanism (not shown).
  • the sheet 22 and the bottom plate 24 connected to the casing 20.
  • the casing 20 extends vertically as a whole, and houses a motor and a transmission mechanism therein.
  • the transmission mechanism is generally located between the motor and the saw blade 22, and is used to transmit the power of the motor to the saw blade 22 to drive the saw blade 22 to rotate.
  • the longitudinal extension direction of the casing 20 is parallel to the axis of the motor, and the axis of the motor is perpendicular to the axis of the saw blade axis.
  • the center line of the housing 20 is co-linear with the axis of the motor.
  • the saw blade 22 in the present invention is a circular saw blade and is connected to the saw blade shaft 23. Since the saw blade 22 has a certain thickness, the saw blade 22 has several saw blade planes in the thickness direction. Of course, the saw blade 22 can also be idealized, and it is considered that the thickness is extremely small, and the plane where the saw blade 22 is located is defined as the saw blade plane. In the following description, the saw blade plane is a plane on which the saw blade 22 is ideally considered to have a very small thickness and the saw blade 22 is located.
  • the cutting plane of the saw blade 22 farthest from the casing 20 is defined as a first side cutting plane 27, and the cutting plane closest to the casing 20 is a second side cutting plane 29. It can be understood that the first side cutting plane 27 and the second side cutting plane 29 are parallel to each other and parallel to the saw blade plane.
  • the bottom plate 24 has a bottom surface 26 and a saw blade slot 28 through which the saw blade 22 can pass. During operation, the bottom surface 26 abuts on the workpiece, and the saw blade 22 can pass through the saw blade groove 28 to cut the workpiece.
  • the bottom plate 24 is movably connected to the housing 20.
  • the bottom plate 24 is rotatably connected to the housing 20 about the pivot axis X1.
  • the pivot axis X1 is set perpendicular to the plane of the saw blade, so that when the casing 20 drives the saw blade 22 to rotate about the pivot axis X1, the distance that the saw blade 22 protrudes from the bottom surface 26 can be changed, thereby changing the cutting depth.
  • a fixed depth adjusting mechanism 30 and a fixed depth locking mechanism are provided between the bottom plate 24 and the casing 20.
  • the depth fixing mechanism 30 includes a lengthwise fixed depth slide 31 provided on one of the bottom plate 24 and the housing 20, and the other depth fixed slide 31 is provided on the other of the bottom plate 24 and the housing 20. ⁇ ⁇ ⁇ ⁇ ⁇ 33 ⁇ The fixed depth slider 33.
  • the fixed-depth slide rail 31 may be an arc-shaped guide rail, and a circle center corresponding to an arc where the guide rail is located is located on the pivot axis X1.
  • the extension direction of the fixed depth slide 31 can also be substantially perpendicular to the bottom surface 26.
  • the fixed depth slide 33 can slide in the fixed depth slide 31 to adjust the distance of the saw blade 22 protruding from the bottom surface 26, thereby adjusting the Cutting depth.
  • the extending direction of the fixed-depth slide rail 31 is substantially perpendicular to the bottom surface 26. It is not required that the fixed-depth slide rail 31 extends in a straight line, as long as it has a longitudinal extension direction substantially perpendicular to the bottom surface 26.
  • the fixed depth locking mechanism (not shown) can keep the fixed depth slider 33 at a specific position relative to the slide rail 31, so that the saw blade 22 can be extended from the bottom surface 26 at a specific distance, and then can be cut out on the workpiece.
  • a specific depth slot may be a conventional structure such as a screw locking mechanism, a cam locking mechanism, and the details are not described in detail.
  • the bottom plate 24 is movably connected to the housing 20.
  • the bottom plate 24 is rotatably connected to the housing 20 about the chamfered axis X2.
  • the chamfered cutting axis X2 is arranged parallel to the bottom surface 26, so that when the casing 20 drives the saw blade 22 to rotate about the chamfered cutting axis X2, the distance that the saw blade 22 protrudes from the bottom surface 26 can be changed, thereby changing the cutting angle and performing bevel cutting.
  • a chamfering adjustment mechanism 36 and a chamfering locking mechanism are also provided between the bottom plate 24 and the casing 20.
  • the chamfering adjustment mechanism 36 includes a longitudinally extending chamfering slide rail 37 provided on one of the base plate 24 and the housing 20, and is mated with the chamfering slide rail 37 provided on the other of the base plate 24 and the housing 20. ⁇ ⁇ ⁇ ⁇ 39 ⁇ The miter slide 39.
  • the extending direction of the miter slide rail 37 is set at an acute angle or an obtuse angle with the bottom surface 26.
  • the miter slide 39 slides in the miter slide rail 37 to adjust the angle of the saw blade plane relative to the bottom surface 26, thereby adjusting the cutting angle of the saw blade 22.
  • the chamfered slide rail 37 is an arc-shaped guide rail, and the circle center corresponding to the arc where the guide rail is located is located on the chamfered axis X2.
  • the chamfered locking mechanism (not shown) can keep the chamfered sliding member 39 at a specific position relative to the chamfered slide rail 37, so that the saw blade 22 is maintained at a specific angle with respect to the bottom surface 26 for oblique cutting .
  • the chamfered locking mechanism may be a conventional structure such as a screw locking mechanism, a cam locking mechanism, and the like, and details are not described in detail.
  • the electric circular saw 1 further includes a fixed guard 40 fixedly connected to the casing 20.
  • the fixed guard 40 covers a part of the saw blade 22 on the upper side of the base plate 24 to prevent injuries.
  • the bottom plate 24 is connected to the casing 20 through the fixed cover 40.
  • the electric circular saw 1 further includes a movable shield 42 movably connected to the casing 20.
  • the movable shield 42 covers another part of the saw blade 22 on the underside of the base plate 24. Therefore, when the electric circular saw 1 is not in use, most of the teeth of the saw blade 22 are housed in the fixed cover 40 and the movable cover 42.
  • the movable shield 42 is pushed and rotated by the workpiece to expose part of the saw teeth of the saw blade 22 on the lower side of the bottom plate 24, and the saw blade 22 can smoothly cut the workpiece.
  • the moving shield 42 is also provided with a moving shield opening piece 44. When using the electric circular saw 1, the operator can also manually push the opening piece 44 to rotate the moving shield 42 to expose the part of the teeth covered by it.
  • the housing 20, the fixed depth adjusting mechanism 30, the fixed depth locking mechanism, the miter adjusting mechanism 36, and the miter locking mechanism are all disposed on the same side of the fixed shield 40.
  • the bottom plate 24 includes a first bottom plate 110 and a second bottom plate 120 movably connected to the first bottom plate 110.
  • the first bottom plate 110 is rotatably connected to the housing 20 about the pivot axis X1.
  • the first bottom plate 110 includes a first saw blade groove 111 through which the saw blade 22 passes, and a first bottom surface 112 abutting against the surface of the workpiece;
  • the second bottom plate 120 includes a second saw blade groove 121, a second bottom surface 122, and First side 124.
  • the first side surface 124 is an abutting surface for abutting with the guide device 150.
  • the first side surface 124 is perpendicular to the second bottom surface 122.
  • the first side surface 124 does not have to be perpendicular to the second bottom surface 122 as long as the first side surface 124 is adapted to the guide device 150.
  • the second bottom plate 120 further includes a second side surface 126 abutting the guide device 150, which is coplanar with the plane of the saw blade 22.
  • the second side surface 126 is perpendicular to the second bottom surface 122.
  • the second side surface 126 does not have to be perpendicular to the second bottom surface 122 as long as the second side surface 126 is adapted to the guide device 150. In this way, when the second bottom plate 120 is moved relative to the first bottom plate 110, the second side surface 126 may be exposed for cooperation with the guide device 150.
  • the guide device 150 may be a plastic commonly used in life, or a wooden ruler, which has a guide surface that can be adapted to the cutting line marked on the workpiece W in advance, and can guide the electric circular saw 1 to move along the cutting line. 151.
  • the guide device 150 may also be other materials having the guide surface 151, for example, other materials having the guide surface 151, such as cut construction materials.
  • the first bottom plate 110 is movably connected to the second bottom plate 120 through a connection mechanism, so that the second bottom surface 122 has a first position coplanar with the first bottom surface 112 (see FIG. 1 and FIG. 4) and is non-coplanar with the first bottom surface 112.
  • the second position see Figure 6, Figure 7).
  • connection mechanism is a cam connection mechanism.
  • the cam connecting mechanism includes a cam portion abutting on the second bottom plate, and the cam portion is rotatably connected to the first bottom plate. When the cam portion rotates, it will drive the second base plate to move relative to the first base plate.
  • the first bottom plate 110 and the second bottom plate 120 are movably connected through the cam connecting mechanism 130.
  • cam connecting mechanisms 130 There are two sets of cam connecting mechanisms 130, which are located along the cutting direction of the electric circular saw 1 and are located on the side of the fixed shield 40 away from the housing 20, and are respectively disposed at the front and rear of the bottom plate 24.
  • the cam connection mechanism 130 includes a cam portion 132, a connection shaft 134, and a connection sleeve 136 that is rotatably fitted with the connection shaft 134.
  • the cam portion 132 is fixedly connected to the connection sleeve 136.
  • the cam portion 132 is provided with a through groove 135, and a connecting sleeve 136 is fixedly connected in the through groove 135.
  • the first bottom plate 110 extends upward from the first bottom surface 112 to a first side wall 114.
  • the first side wall 114 is provided with a hole portion 116, and the hole portion 116 is disposed through the first side wall 114.
  • the connecting shaft 134 passes through the hole portion 116 and is fixedly connected to the first bottom plate 110.
  • the second bottom plate 120 extends from the second bottom surface 122 upward to a second side wall 128.
  • the second side wall 128 includes a second side surface 126.
  • the second side wall 128 is provided with a through hole 129 through which the connecting shaft 134 passes.
  • the connecting shaft 134 passes through the through hole 129 and cooperates with the connecting sleeve 136. In this way, when the cam portion 132 is driven to rotate, it will abut the second bottom plate 120 and drive the second bottom plate 120 to move relative to the first bottom plate 110.
  • the cam portion 132 is fixedly connected with the operation portion 133 and the operation portion 133 is driven to drive the cam portion 132 to rotate and finally make the second base plate 120 move relative to the first base plate 110.
  • connection shaft 134 is configured as a bolt
  • connection sleeve 136 is configured as a nut
  • the nut 136 may also be fixed on the first base plate 110, and the second base plate 120 is provided with a through hole 129 through which the bolt 134 passes.
  • the bolt 134 passes through the through hole 129 and cooperates with the nut 136. .
  • the connecting shaft may be provided.
  • the second bottom plate extends from the second bottom surface upward to a second side wall, the second side wall includes a second side surface that cooperates with the guide device, and the second side wall is provided with a through hole for the connecting shaft to pass through.
  • the connecting shaft is rotatably connected to the first base plate about its own axis, and the other end of the connecting shaft passing through the through hole is fixed with a cam portion. In this way, when the cam portion rotates, it can drive the second bottom plate to move relative to the first bottom plate, and finally expose the second side surface.
  • the connecting shaft may be configured as a rivet.
  • the rotation axis X3 of the cam portion 132 relative to the first bottom plate 110 is parallel to the rotation axis of the saw blade 22.
  • the outer surface of the cam portion 132 includes an asymptotic section 1321 (MN) and a circular arc section 1322 (NP).
  • MN asymptotic section
  • NP circular arc section 1322
  • the distance of the asymptotic section 1321 from the rotation axis X3 gradually increases. That is, when the operation portion 133 is rotated in the direction F, and the asymptotic section 1321 abuts the second bottom plate 120, the distance moved by the second bottom plate 120 relative to the first bottom plate 110 is always increased; along the rotation direction F of the cam portion 132, the arc segment 1322 The distance from the rotation axis X3 does not change and remains at the farthest distance from the rotation axis X3.
  • the second base plate 120 moves the farthest distance from the first base plate 110 and remains at this position.
  • the contact form between the cam portion 132 and the second bottom plate 120 is a surface contact, and the cam portion 132 and the second bottom plate 120 can be realized. Reliable abutment.
  • the electric circular saw 1 is further provided with a guide device.
  • the extending direction of the through hole 129 is designed to be perpendicular to the second bottom surface 122.
  • the cam portion 132 is rotated to drive the second base plate 120 to move relative to the first base plate 110, the cooperation of the connecting shaft 134 and the through hole 129 will make the second base plate 120 only relative to the first base plate 110 in the vertical direction. motion. That is, in this embodiment, the through hole 129 having a direction perpendicular to the extending direction of the second bottom surface 122 functions as a guide device.
  • a separate guide device may be provided separately from the cam connecting mechanism.
  • a slider is fixedly disposed on the first bottom plate, and a sliding groove matched with the slider is correspondingly disposed on the second bottom plate.
  • the extending direction of the chute is configured to be perpendicular to the second bottom surface.
  • a holding device is further provided between the first bottom plate 110 and the second bottom plate 120.
  • the holding device is used to hold the first bottom surface 112 of the first bottom plate 110 and the second bottom surface 122 of the second bottom plate 120 coplanar.
  • the holding device includes a spring 139.
  • the upper end surface of the spring 139 is in contact with the second bottom plate 120, and the lower end surface of the spring 139 is in contact with the receiving portion 118 of the first bottom plate 110.
  • the cam portion 132 When the operation portion 133 is not driven, the cam portion 132 is separated from the second base plate 120.
  • the spring 139 keeps the second bottom surface 120 in a first position that is coplanar with the first bottom surface 112, as shown in FIGS. 1 and 4.
  • the bolt 134 and the nut 136 are in a loosely fitted state, and the two can still rotate relative to each other. There is a gap between the first side wall 114 and the second side wall 128.
  • the cam portion 132 When the user overcomes the force of the spring 139 and drives the operation portion 133 to rotate, the cam portion 132 starts to contact the second bottom plate 120; with the further rotation of the operation portion 133, the cam portion 132 will push the second bottom plate 120 to move down, and the second The side surface 126 is exposed; at the same time, the rotation of the operation portion 133 drives the nut 136 to further cooperate with the bolt 134.
  • the second bottom plate 120 When the rotating cam portion 132 to the arc segment 1322 abut the second bottom plate 120, the second bottom plate 120 will move down to the position farthest from the first bottom plate 110; meanwhile, with the further cooperation of the nut 136 and the bolt 134, the second The side wall 128 abuts the first side wall 114, and the distance between the two is negligible. At this time, the second bottom plate 120 is in the second position, as shown in FIGS. 6 and 7. When the operation portion 133 is loosened, the thread friction between the nut 136 and the bolt 134 is sufficient to overcome the force of the spring 139 and fix the second bottom plate 120 at this position.
  • the operation of the operation portion 133 to switch the second base plate 120 between the first position and the second position means that the operation portions 133 of the two sets of front and rear cam connection mechanisms 130 are operated.
  • the second bottom plate 120 reaches the second position, that is, the arc segments 1322 of the two sets of cam portions 132 contact the second bottom plate 1322, then whether the user continues to rotate along the operation portion 133 or the two sets of front and rear cam connecting mechanisms 130
  • the rotation angle of the operation portion 133 is not uniform, and the second side surfaces 126 of the second bottom plate 120 are all coplanar with the plane of the saw blade.
  • the second side surface 126 is coplanar with the plane of the saw blade, which means that when the second bottom plate 120 moves farthest from the first bottom plate 110, when the cooperation of the second side surface 126 and the guide surface 151 is required to achieve cutting At this time, the second side surface 126 is coplanar with the plane of the saw blade.
  • the first bottom surface 112 of the first bottom plate 110 is supported by the guide device 150, the second side surface 126 of the second bottom plate 120 abuts the guide surface 151 of the guide device 150, and the electric circular saw 1 moves along the guide device 150 By sliding, the saw blade 22 can cut the workpiece W.
  • the second side surface 126 is coplanar with the second side cutting plane 29 of the saw blade 22. Therefore, the electric circular saw 1 of the present invention is more convenient to use.
  • the operator usually marks a cutting line on the workpiece W before cutting. This cutting line may be drawn by ink, or may be a laser indication.
  • the guide device 150 has a guide surface 151. When cutting, first align the guide surface 151 of the guide device 150 with the cutting line marked on the workpiece W in advance, and then adjust the cam connecting mechanism 130 to translate the second base plate 120 relative to the first base plate 110 to expose the second side surface 126, and then The second side surface 126 is abutted on the guide surface 151 of the guide device 150.
  • the trajectory of the rotary cutting is the trajectory shown by the cutting line, and the electric circular saw 1 can be moved to complete the cutting.
  • the coplanarity of the saw blade plane and the second side surface 126 of the second base plate 120 is not limited to coplanarity in the absolute sense. Those skilled in the art can think of it because of the gaps and tolerances caused by the combination of mechanical structures. The case where the plane of the saw blade and the second side surface 126 are parallel to each other and are spaced apart from each other by a certain distance so as not to be absolutely coplanar is also within the coplanar range of the present invention.
  • the second saw blade groove 121 on the second bottom plate 120 through which the saw blade 22 can pass is semi-closed, that is, the saw blade groove 121 on the second bottom plate 120 through which the saw blade 22 can pass has an opening , So that the saw blade plane of the saw blade 22 can be flush with the guide surface 151.
  • the second bottom plate 120 is movably connected to the first bottom plate 110, so that the electric circular saw 1 can be switched between two different working states.
  • the first bottom surface 112 of the first bottom plate 110 and the second bottom surface 122 of the second bottom plate 120 are coplanar with the workpiece W, and the first side surface 124 of the second bottom plate 120 It is in contact with the guide surface 151 on the guide device 150.
  • the first bottom surface 112 of the first bottom plate 110 is in contact with the upper surface of the guide device 150
  • the second side surface 126 of the second bottom plate 120 is in contact with the guide surface 151 on the guide device 150.
  • the second side surface 126 of the second bottom plate 120 closes the first saw blade groove 111 of the first bottom plate 110.
  • the saw blade 22 is located on the first bottom plate 110 and the second bottom plate 120 together to form
  • the second side surface 124 on the second bottom plate 120 abuts on the guide surface 151 on the guide device 150, which can realize traditional cutting and conform to the user's normal usage habits.
  • the second side surface 126 on the second bottom plate 120 which is approximately flush with the plane of the saw blade is in contact with the guide surface 151 on the guide device 150, so that rapid cutting can be achieved.
  • the electric circular saw 1 of this embodiment can realize conventional cutting and fast cutting.
  • the second base plate 120 can move relative to the first base plate 1 and can better adapt to uneven surfaces. This greatly facilitates the user's operation of the electric machine. Circular saw.
  • the first bottom plate is movably connected to the second bottom plate, the position of the saw blade plane relative to the first bottom plate is relatively fixed, and the second side is disposed on the second bottom plate.
  • the two bottom plates are shaken, so that in a direction perpendicular to the plane of the saw blade, the first side wall cannot be close to the second side wall, and the second side face may deviate from the plane of the saw blade, thereby bringing the actual cutting result and the cutting line. There are some deviations between them, and the cutting accuracy is low. For this reason, the electric circular saw needs to be designed with a locking mechanism.
  • the first bottom plate and the second bottom plate are in a non-coplanar second position, when the second side is used against the guide surface to perform the cutting work, the second side and the The plane of the saw blade is coplanar.
  • the locking mechanism is a bolt 34 and a nut 136 that is rotationally matched with the bolt 134.
  • the locking mechanism is configured as a locking cam that abuts against the second bottom plate in a direction perpendicular to the plane of the saw blade.
  • abutting the second bottom plate in a direction perpendicular to the plane of the saw blade means that when the locking cam abuts the second bottom plate, the force that the locking cam is subjected to, the force from the second bottom plate is perpendicular to the plane of the blade .
  • a locking cam 140 is rotatably connected to the second bottom plate 120, and a rotation axis X4 of the locking cam 140 is parallel to the plane of the saw blade.
  • the locking cam 140 does not contact the second bottom plate 120; when the second bottom plate 120 moves When reaching the second position farthest from the first base plate 110, the first side wall 114 is in close contact with the second side wall 128, and the arc segment from the rotation of the locking cam 140 to the locking cam 140 abuts against the second base plate 120.
  • the second bottom plate 120 can be firmly abutted against the first bottom plate 110 in a direction perpendicular to the plane of the saw blade, and the second side surface 126 is coplanar with the plane of the saw blade.
  • the cam portion 132 that moves the second bottom plate 120 relative to the first bottom plate 110 is provided on the nut 136 of the locking mechanism.
  • the locking mechanism may be provided separately from the cam portion.
  • the cam portion is provided in contact with the second base plate and is rotatably connected to the first base plate. The user acts on the cam portion to drive the second bottom plate to move relative to the first bottom plate; when the second bottom plate moves to the second position, the user acts on the locking mechanism to lock the relative position of the first bottom plate and the second bottom plate, so that the first The two sides are coplanar with the plane of the saw blade.
  • the cam portion may also be changed, as long as it is capable of acting on the second base plate so that the second base plate can move relative to the first base plate.

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Abstract

本发明提供一种切割工具，包括壳体；马达，收容于壳体，用于驱动锯片旋转，所述锯片具有锯片平面；底板，与所述壳体连接，所述底板包括具有第一底面的第一底板、具有第二底面的第二底板，所述第二底板设置有与锯片平面共面的抵靠面；第一底板与第二底板通过凸轮连接机构活动连接，凸轮连接机构包括抵接第二底板的凸轮部，凸轮部可转动地连接于第一底板上；凸轮部转动，驱动第二底板相对第一底板运动，使抵靠面露出。与现有技术相比，本发明提供的切割工具，通过凸轮部抵接第二底板促使第二底板相对于第一底板运动；并且设置了锁紧机构，使得在第二底板运动至第二位置时，在需要抵靠面与引导装置配合实现切割工作时，维持抵靠面与锯片平面共面。

Description

切割工具 技术领域
本发明涉及一种切割工具。
背景技术
切割工具，例如电圆锯，是人们常用的通过锯片进行工件切割的电动工具。进行工件切割时，通常的方式是，将切割工具的底板放置在工件上，同时让锯片对准标示在工件上的切割线，然后在工件表面上推动切割工具进行切割。但是操作者在切割过程中，往往因为人为的因素导致切割精度无法保证，且工作效率也比较低。
现有的一种解决办法是使用导向装置进行导向，在切割时，将切割工具的底板与锯片平行的一个侧边，抵靠在导向装置的引导面上，然后移动切割工具进行切割并且保证切割工具的底板的这一侧边始终沿着引导面移动，能够避免因人为因素导致的切割精度较低，工作效率较低的问题。但是这种解决办法同样存在问题，由于切割工具的底板具有一定的宽度，锯片与底板的侧边之间有一定的距离，因此人们不能将导向装置的引导面直接与标示在工件上的切割线对齐，而是需要首先测量锯片与底板的侧边之间的距离，然后将导向装置固定在其引导面与切割线之间间隔等于所述距离的位置，操作起来比较麻烦，特别是在执行需要不断变换导向装置位置的切割时，工作效率较低；并且由于测量以及根据测量结果设置导向装置位置时，均可能存在一定的误差，因此切割工具实际切割结果与切割线可能存在一些偏差，切割精度较低。
发明内容
为克服现有技术的缺陷，本发明所要解决的问题是提供一种切割精度高且使用方便的切割工具。
为解决上述问题，本发明的技术方案是：一种切割工具，用于与导向装置配合进行切割，所述导向装置具有引导面，所述切割工具包括：壳体；马达，收容于所述壳体；传动机构，与所述马达连接，用于驱动锯片，所述锯片具有锯片平面；底板，与所述壳体连接，所述底板包括具有第一底面的第一底板、具有第二底面的第二底板，所述第二底板上设置有与所述锯片平面 共面的抵靠面，所述抵靠面用于与所述引导面配合；
其中，所述第一底板与所述第二底板通过凸轮连接机构活动连接；所述凸轮连接机构包括与所述第二底板抵接的凸轮部，所述凸轮部可转动地连接于所述第一底板上；所述凸轮部转动，驱动所述第二底板相对于所述第一底板运动，使所述抵靠面露出。
在其中一个实施方式中，所述凸轮连接机构包括与所述第一底板连接的连接轴；所述第二底板上开设有供所述连接轴穿过的通孔，所述连接轴穿过所述通孔与所述凸轮部连接。
在其中一个实施方式中，所述连接轴围绕其自身轴线可转动地连接于所述第一底板上，所述连接轴穿过所述通孔与所述凸轮部固定连接。
在其中一个实施方式中，所述连接轴与所述第一底板固定连接；所述凸轮连接机构还包括与所述连接轴转动配合的连接套，所述连接轴穿过所述通孔与所述连接套配合，所述凸轮部固定连接于所述连接套上。
在其中一个实施方式中，所述连接轴被构造为螺栓，所述连接套被构造为螺母。
在其中一个实施方式中，所述凸轮部的旋转轴线与所述锯片的旋转轴线平行。
在其中一个实施方式中，所述切割工具还设置有引导装置，所述引导装置用于引导所述第二底板沿垂直于所述第二底面的方向相对于所述第一底板运动。
在其中一个实施方式中，所述通孔的延伸方向被构造为垂直于所述第二底面，所述引导装置包括所述通孔。
在其中一个实施方式中，所述凸轮部固定连接有供用户操作的操作部。
在其中一个实施方式中，所述第一底板与所述第二底板之间设置有保持装置，所述保持装置用于保持所述第一底板的第一底面与所述第二底板的第二底面共面。
在其中一个实施方式中，所述保持装置包括弹簧，所述弹簧的一端抵接所述第一底板，所述弹簧的另一端抵接所述第二底板。
与现有技术相比，本发明提供的切割工具，通过凸轮部抵接第二底板，使得第二底板相对于第一底板运动；一方面利用了凸轮部本身的结构设计，提供了促使第二底板运动的力，且操作方便；另一方面，凸轮部本身的自锁 效应，能在抵靠面与导向装置配合时，将第二底板相对于第一底板保持在特定的位置；
为解决上述问题，本发明的另一个技术方案是：一种切割工具，所述切割工具包括：壳体；马达，收容于所述壳体；传动机构，与所述马达连接，用于驱动锯片，所述锯片具有锯片平面；底板，包括活动连接的第一底板与第二底板，所述壳体与所述第一底板连接；
其中，所述第二底板设置有抵靠面，所述第一底板与所述第二底板相对活动，使所述抵靠面露出；所述切割工具还包括锁紧机构，所述锁紧机构用于保持所述抵靠面与所述锯片平面共面。
在其中一个实施方式中，所述锁紧机构包括螺栓以及与所述螺栓转动配合的螺母；所述螺栓与所述第一底板固定连接，所述第二底板开设有供所述螺栓穿过的通孔，所述螺栓穿过所述通孔与所述螺母配合。
在其中一个实施方式中，所述锁紧机构包括螺栓以及与所述螺栓转动配合的螺母；所述螺母与所述第一底板固定连接，所述第二底板开设有供所述螺栓穿过的通孔，所述螺栓穿过所述通孔与所述螺母配合。
在其中一个实施方式中，所述锁紧机构包括沿垂直于所述锯片平面的方向与所述第二底板抵接的锁紧凸轮，所述锁紧凸轮可转动地连接于所述第二底板上。
在其中一个实施方式中，所述锁紧凸轮的旋转轴线平行于所述锯片平面。
在其中一个实施方式中，所述第一底板与所述第二底板相对平动。
在其中一个实施方式中，所述切割工具还包括与所述第二底板抵接的凸轮部，所述凸轮部可转动地连接于所述第一底板上；所述凸轮部转动，驱动所述第二底板相对于所述第一底板平动。
为解决上述问题，本发明的另一个实施方式是：一种切割工具，用于与导向装置配合进行切割，所述导向装置具有引导面，所述切割工具包括：壳体；马达，收容于所述壳体；传动机构，与所述马达连接，用于驱动锯片，所述锯片具有锯片平面；底板，所述底板包括具有第一底面的第一底板、具有第二底面的第二底板；其中，所述壳体与所述第一底板连接，所述第二底板上设置有与所述引导面配合的抵靠面，所述抵靠面与所述引导面配合时，所述第一底面由所述导向装置支撑，
其中，所述切割工具还设置有锁紧机构，在所述抵靠面与所述引导面配 合时，所述锁紧机构用于保持所述抵靠面与所述锯片平面共面。
本发明提供的切割工具，由于设置了锁紧机构，避免了因第一底板与第二底板活动连接，设置在第二底板上的抵靠面，与相对于第一底板的位置保持相对恒定的锯片平面不共面所带来的实际切割结果与切割线不对齐，切割精度低的技术问题。
附图说明
下面结合附图和实施方式对本发明作进一步说明。
图1是本发明提供的切割工具的主视立体图；
图2是图1所示的切割工具的后视立体图。
图3是图1所示的切割工具的左视立体图。
图4是图1所示的切割工具的使用状态主视图，此时第二底面位于与第一底面共面的第一位置。
图5是图1所示的切割工具的底板的部分爆炸图，其中A-A示出了凸轮部的局部放大图。
图6是图1所示的切割工具的底板的主视立体图，此时第二底面位于与第一底面非共面的第二位置。
图7是图1所示的切割工具的使用状态主视图，此时第二底面位于与第一底面非共面的第二位置。
图8示出了本发明另一实施方式的锁紧机构的示意简图，其中8a为第一位置时，锁紧机构作用于第二底板的示意简图，8b为第二位置时，锁紧机构作用于第二底板的示意简图。
具体实施方式
本实施方式中以电圆锯为例来阐述本发明的创作构思。但是本发明的切割工具并不局限于电圆锯，也可以是其它特别是便携式动力工具。另外，本发明的描述中，除非另外指出，方向术语，如前、后、左、右、上和下等，都是相对于正常使用图1所示的动力工具的方向，如定义动力工具的前进方向为前，与动力工具的前进方向相反的方向为后等。
请参见图1至图3，本发明提供一种电圆锯1，包括壳体20、收容于壳体20内的马达(未图示)、由马达通过传动机构(未图示)驱动的锯片22、与壳 体20连接的底板24。
壳体20整体纵长延伸，其内收容有马达及传动机构。传动机构大致位于马达和锯片22之间，用于将马达的动力传递至锯片22从而驱动锯片22做旋转运动。壳体20的纵长延伸方向与马达的轴线平行，且马达的轴线与锯片轴的轴线垂直设置。优选的，壳体20的中心线与马达的轴线共线。
本发明中的锯片22为圆锯片，配接在锯片轴23上。由于锯片22具有一定的厚度，因此，锯片22在其厚度方向上具有若干个锯片平面。当然，也可以把锯片22理想化，认为其厚度极小时，锯片22所在的平面定义为锯片平面。在下面的描述中，锯片平面是以将锯片22理想化认为其厚度极小时，锯片22所在的平面。定义锯片22最远离壳体20的切割平面为第一侧切割平面27，最接近壳体20的切割平面为第二侧切割平面29。可以理解的是，第一侧切割平面27与第二侧切割平面29互相平行，且与锯片平面平行。
底板24具有底面26和可供锯片22穿过的锯片槽28。工作时，底面26抵靠在工件上，锯片22穿过锯片槽28即可切割工件。
再参见图1和图2，底板24与壳体20活动配接。在本发明中，底板24围绕枢轴轴线X1可转动的连接在壳体20上。枢轴轴线X1垂直于锯片平面设置，如此当壳体20带动锯片22围绕枢轴轴线X1转动时，可以改变锯片22伸出底面26的距离，从而改变切割深度。底板24与壳体20之间设有定深调节机构30和定深锁紧机构。
定深调节机构30包括设置在底板24和壳体20中的一个上的纵长延伸的定深滑轨31、设置在底板24和壳体20中的另一个上与定深滑轨31配接的定深滑动件33。定深滑轨31可以是弧形导轨，其导轨所在的圆弧对应的圆心位于枢轴轴线X1上。当然，定深滑轨31的延伸方向也可以大致垂直于底面26，定深滑动件33在定深滑轨31内滑动即可调节锯片22伸出底面26的距离，从而调节锯片22的切割深度。定深滑轨31的延伸方向大致垂直于底面26并不要求定深滑轨31沿直线延伸，只要具有大致垂直于底面26的纵长延伸方向即可。
定深锁紧机构(未图示)可以使定深滑动件33相对滑轨31保持在某一特定的位置，从而使锯片22保持特定的距离伸出底面26，进而可以在工件上切出特定深度的槽。定深锁紧机构可以是螺纹锁紧机构、凸轮锁紧机构等常规结构，具体不再赘述。
再参见图1和图3，底板24与壳体20活动配接。在本发明中，底板24围绕斜切轴线X2可转动的连接在壳体20上。斜切轴线X2平行于底面26设置，如此当壳体20带动锯片22围绕斜切轴线X2转动时，可以改变锯片22伸出底面26的距离，从而改变切割角度，进行斜角切割。底板24与壳体20之间还设有斜切调节机构36和斜切锁紧机构。
斜切调节机构36包括设置在底板24和壳体20中的一个上的纵长延伸的斜切滑轨37、设置在底板24和壳体20中的另一个上与斜切滑轨37配接的斜切滑动件39。斜切滑轨37的延伸方向与底面26呈锐角或钝角设置，斜切滑动件39在斜切滑轨37内滑动即可调节锯片平面相对底面26的角度，从而调节锯片22的切割角度。优选的，斜切滑轨37是弧形导轨，其导轨所在的圆弧对应的圆心位于斜切轴线X2上。
斜切锁紧机构(未图示)可以使斜切滑动件39相对斜切滑轨37保持在某一特定的位置，从而使锯片22保持在相对于底面26特定的角度，进行斜角切割。斜切锁紧机构可以是螺纹锁紧机构、凸轮锁紧机构等常规结构，具体不再赘述。
再请参见图1，电圆锯1还包括与壳体20固定连接的定护罩40，定护罩40覆盖锯片22位于底板24上侧的部分锯齿，可以防止伤害。而底板24则通过该定护罩40与壳体20连接。
电圆锯1还包括与壳体20活动连接的动护罩42，动护罩42在电圆锯1不使用时，覆盖锯片22的位于底板24下侧的另一部分锯齿。由此，电圆锯1在不使用时，锯片22的大部分锯齿都被收容在定护罩40和动护罩42内。电圆锯1在使用时，动护罩42被工件推动转动从而露出锯片22位于底板24下侧的部分锯齿，锯片22可以顺利切割工件。动护罩42上还设有动护罩打开件44，在使用电圆锯1时，操作者也可以手动推动打开件44而使动护罩42转动而露出其覆盖的那部分锯齿。
本发明中，壳体20、定深调节机构30、定深锁紧机构、斜切调节机构36、斜切锁紧机构均设置在定护罩40的同一侧。
请参见图5至图7，本发明中，底板24包括第一底板110和与第一底板110活动连接的第二底板120。其中，第一底板110围绕枢转轴线X1可转动的与壳体20连接。
具体的，第一底板110包括供锯片22穿过的第一锯片槽111和与工件表 面抵靠的第一底面112；第二底板120包括第二锯片槽121、第二底面122和第一侧面124。在这里，第一侧面124为用于与导向装置150抵接的抵靠面。优选的，第一侧面124与第二底面122垂直设置。当然，第一侧面124也不一定要垂直于第二底面122，只要第一侧面124与导向装置150适配即可。第二底板120还包括与导向装置150抵接的第二侧面126，其与锯片22的锯片平面共面。优选的，第二侧面126与第二底面122垂直设置。当然，第二侧面126也并不一定要垂直于第二底面122，只要第二侧面126与导向装置150适配即可。如此，当第二底板120相对第一底板110运动后，可露出第二侧面126用于与导向装置150配合。
导向装置150可以是生活中常见的塑料制，或者木制的直尺，其具有能够与预先标示在工件W上的切割线相适配，并且能够引导电圆锯1沿切割线移动的引导面151。当然，导向装置150也可以是具有引导面151的其他材料，例如切割下来的建筑材料等其他具有可以作为引导面151的材料。具体的例如，市场上出售有若干不同型号的标准木材，这些标准的木材具有非常平滑的引导面151，是非常好的导向装置来源。
第一底板110通过连接机构与第二底板120活动连接，使得第二底面122具有与第一底面112共面的第一位置(可参见图1，图4)和与第一底面112非共面的第二位置(可参见图6，图7)。
本实施方式中，连接机构为凸轮连接机构。凸轮连接机构包括与第二底板抵接的凸轮部，凸轮部可转动地连接于第一底板上。当凸轮部转动，其将驱动第二底板相对于第一底板运动。
请参见图5至图7，第一底板110和第二底板120通过凸轮连接机构130活动连接。凸轮连接机构130为两组，沿电圆锯1的切割方向且位于定护罩40远离壳体20的一侧，分别设置在底板24的前后方。
凸轮连接机构130包括凸轮部132、连接轴134以及与连接轴134转动配合的连接套136。其中，凸轮部132与连接套136固定连接。具体的，凸轮部132开设有通槽135，通槽135内固定连接有连接套136。
第一底板110自第一底面112向上延伸出第一侧壁114，第一侧壁114开设有孔部116，孔部116贯穿第一侧壁114设置。连接轴134穿过该孔部116并与第一底板110固定连接。第二底板120自第二底面122向上延伸出第二侧壁128，第二侧壁128包括第二侧面126。第二侧壁128开设有供连接 轴134穿过的通孔129。连接轴134穿过该通孔129与连接套136配合。如此，当带动凸轮部132转动，其将抵接第二底板120，并驱动第二底板120相对第一底板110运动。
为了操作方便，凸轮部132上固定连接有操作部133，驱动操作部133，即可带动凸轮部132转动，并最终使得第二底板120相对于第一底板110运动。
本实施方式中，连接轴134被构造为螺栓，连接套136被构造为螺母。
一种可能的实施方式中，也可将螺母136固定设置在第一底板110上，第二底板120开设有供螺栓134穿过的通孔129，螺栓134穿过该通孔129与螺母136配合。
一种可能的实施方式中，也可仅设置连接轴。与前述方案类似，第二底板自第二底面向上延伸出第二侧壁，第二侧壁包括与导向装置配合的第二侧面，第二侧壁开设有供连接轴穿过的通孔。区别是，连接轴围绕其自身轴线可转动地与第一底板连接，连接轴穿过通孔的另一端固定设置有凸轮部。如此，当凸轮部转动，其能够驱动第二底板相对于第一底板运动，并最终使得第二侧面露出。一种可能的实施方式中，连接轴可被构造为铆钉。
出于尺寸设计的合理性，凸轮部132相对于第一底板110的旋转轴线X3平行于锯片22的旋转轴线。
凸轮部132的外表面包括渐近段1321(MN)与圆弧段1322(NP)，沿凸轮部132的旋转方向F，渐近段1321距旋转轴线X3的距离逐渐变大。即沿方向F旋转操作部133，渐近段1321抵接第二底板120时，第二底板120相对第一底板110运动的距离一直增大；沿凸轮部132的旋转方向F，圆弧段1322距旋转轴线X3的距离不变且保持在距旋转轴线X3最远的距离。即沿该方向F旋转操作部133，圆弧段1322抵接第二底板120时，第二底板120相距第一底板110移动的距离最远且保持在该位置。如此设置，使得第二底板120相对于第一底板110的运动距离最远时，凸轮部132与第二底板120之间的接触形式是面接触，能够实现凸轮部132与第二底板120之间的可靠抵接。
为了引导第二底板120相对于第一底板110沿竖直方向运动，即，沿垂直于第二底面122的方向运动，电圆锯1上还设置有引导装置。
本实施方式中，通孔129的延伸方向被设计成垂直于第二底面122。如 此，当转动凸轮部132，驱动第二底板120相对于第一底板110运动时，连接轴134与通孔129的配合，将使得第二底板120只能沿竖直方向相对于第一底板110运动。也就是说，本实施方式中，具有垂直于第二底面122的延伸方向的通孔129起到了引导装置的作用。
当然，也可独立于上述凸轮连接机构另设置一套引导装置。诸如，在第一底板上固定设置一滑块，在第二底板上对应设置与前述滑块配合的滑槽。滑槽的延伸方向被构造为垂直于第二底面。如此，当凸轮部带动第二底板相对于第一底板运动时，滑块与滑槽的滑移配合将使得第二底板只能沿垂直于第二底面的方向相对于第一底板运动。
第一底板110与第二底板120之间还设有保持装置。保持装置用于保持第一底板110的第一底面112与第二底板120的第二底面122共面。
本实施方式中，所述保持装置包括弹簧139。弹簧139的上端面与第二底板120抵接，弹簧139的下端面与第一底板110的接收部118抵接。
当操作部133未被驱动时，凸轮部132与第二底板120分离。弹簧139将第二底面120保持在与第一底面112共面的第一位置，如图1与图4所示。此时螺栓134与螺母136处于松配合状态，二者之间仍可相对转动，第一侧壁114与第二侧壁128之间存有间隙。
当用户克服弹簧139的作用力，驱动操作部133旋转时，凸轮部132开始与第二底板120接触；随着操作部133的进一步旋转，凸轮部132将推动第二底板120下移，第二侧面126露出；同时，操作部133的旋转带动螺母136与螺栓134进一步配合。当旋转凸轮部132至圆弧段1322抵接第二底板120时，第二底板120将下移至距第一底板110最远的位置；同时随着螺母136与螺栓134的进一步配合，第二侧壁128与第一侧壁114抵接，两者之间的距离忽略不计。此时，第二底板120处于第二位置，如图6、图7所示。松开操作部133，螺母136与螺栓134之间的螺纹摩擦足以克服弹簧139的作用力，将第二底板120固定在该位置。
当然，由于凸轮的自锁效应，当第二底板120下移至距第一底板110最远的位置时，即，凸轮部132的圆弧段1322抵接第二底板120时，凸轮部132本身也会将第二底板120维持在该位置。因为此时凸轮部132所承受的，来自第二底板120的力将指向圆弧段1322的圆心。无论第二底板120施加给凸轮部132的力有多大，凸轮部132都不会转动。
可以理解的是，操作操作部133使第二底板120在第一位置与第二位置之间切换指的是前后两组凸轮连接机构130的操作部133均被操作。
螺栓134与螺母136之间的螺纹连接虽会使得第二底板120朝向第一底板110运动，但位于第二位置的第二底板120已处于与第一底板110抵接的状态，螺栓134与螺母136的进一步配合只会使得第一侧壁114与第二侧壁128抵靠的更紧密，并不会带来两者之间的距离变化。因此，只要第二底板120到达第二位置，即，两组凸轮部132的圆弧段1322接触第二底板1322，那么无论是用户继续沿旋转操作部133抑或是前后两组凸轮连接机构130的操作部133的旋转角度不一致，第二底板120的第二侧面126均与锯片平面共面。
本发明中，第二侧面126与锯片平面共面，指的是：当第二底板120运动至距第一底板110最远时，当需要利用第二侧面126与引导面151的配合实现切割时，第二侧面126与锯片平面共面。
如图7所示，第一底板110的第一底面112由导向装置150支撑，第二底板120的第二侧面126与导向装置150的引导面151抵接，电圆锯1沿着导向装置150滑动，锯片22即可切割工件W。
具体的，在实际操作过程中，第二侧面126与锯片22的第二侧切割平面29共面。由此，本发明的电圆锯1使用更加方便。具体的，操作者在切割前通常会在工件W上标记切割线，这个切割线可以是墨水绘制，亦可以是激光指示等。导向装置150具有引导面151。进行切割时，首先将导向装置150的引导面151与预先标记在工件W上的切割线对齐，然后调节凸轮连接机构130使第二底板120相对第一底板110平移而露出第二侧面126，再将第二侧面126抵靠在导向装置150的引导面151上，由于锯片平面与第二底板120的第二侧面126共面，所以锯片平面也是紧挨在引导面151上的，锯片22旋转切割的轨迹即为切割线所示出的轨迹，移动电圆锯1即可完成切割。
从而，通过第二底板120与导向装置150的配合，在切割前无需进行额外的测量，也无需在引导面151和切割线之间预留出底板24的空间，即可方便快速的完成切割。切割方便后，切割效率更高。
当然，锯片平面与第二底板120的第二侧面126共面并非仅限于绝对意义上共面，本领域技术人员能够想到的是，由于机械结构之间相互结合存在的间隙以及公差等原因造成的锯片平面与第二侧面126相互平行且相距一定 距离从而并未绝对共面的情况，也是属于本发明的共面范围内的。
本发明中，第二底板120上的可供锯片22穿过的第二锯片槽121呈半封闭状，即第二底板120上的可供锯片22穿过的锯片槽121具有开口，从而使锯片22的锯片平面能够与引导面151平齐。
第二底板120与第一底板110活动连接，使电圆锯1在两种不同的工作状态之间切换。如图4所示，在第一工作状态下，第一底板110的第一底面112与第二底板120的第二底面122共面共同与工件W抵接，第二底板120的第一侧面124与导向装置150上的引导面151抵接。如图7，在第二工作状态下，第一底板110的第一底面112与导向装置150的上表面抵接，第二底板120的第二侧面126与导向装置150上的引导面151抵接。由此，在第一工作状态下，第二底板120的第二侧面126封闭第一底板110的第一锯片槽111，此时，锯片22位于第一底板110和第二底板120共同形成的封闭的锯片槽中，第二底板120上的第二侧面124与导向装置150上的引导面151抵接，可以实现传统切割，符合用户的常规使用习惯。在第二工作状态下，与锯片平面近似平齐的第二底板120上的第二侧面126与导向装置150上的引导面151抵接，可以实现快速切割。
因此，本实施例的电圆锯1即可实现传统切割，也可实现快速切割，而且第二底板120可相对第一底板1活动，更能适应不平整的平面，如此大大方便了用户操作电圆锯。
需要说明的是，由于第一底板与第二底板活动连接，锯片平面相对于第一底板的位置是相对固定的，而第二侧面是设置在第二底板上的，一旦第一底板与第二底板产生晃动，使得在垂直于锯片平面的方向上，第一侧壁不能紧贴着第二侧壁，第二侧面恐偏离锯片平面，并由此带来实际切割结果与切割线之间存在一些偏差，切割精度低的问题。为此，电圆锯需设计锁紧机构，在第一底板与第二底板处于非共面的第二位置时，在需利用第二侧面抵靠引导面实现切割工作时，保证第二侧面与锯片平面共面。
本实施方式中，锁紧机构即为螺栓34以及与螺栓134转动配合的螺母136。
在一种可能的实施方式中，锁定机构被构造成沿垂直于锯片平面的方向与第二底板抵接的锁紧凸轮。此处，沿垂直于锯片平面的方向与第二底板抵接指的是：当锁紧凸轮抵接第二底板时，锁紧凸轮所受到的，来自第二底板 的力与锯片平面垂直。参考图5至图7，当第二底板120运动至距第一底板110最远时，即，凸轮部132的圆弧段1322抵接第二底板120时，凸轮部132不能转动，并能将第二底板120保持在距第一底板110最远的第二位置。同理，如图8所示，第二底板120上可转动地连接有锁紧凸轮140，锁紧凸轮140的转动轴线X4平行于锯片平面。第一位置时，第一底板110的第一侧壁114与第二底板120的第二侧壁128之间仍有间隙，锁紧凸轮140与第二底板120不接触；当第二底板120运动至距第一底板110最远的第二位置时，第一侧壁114紧贴着第二侧壁128，旋转锁紧凸轮140至锁紧凸轮140的圆弧段抵接第二底板120。如此，便能在垂直于锯片平面的方向上，将第二底板120紧紧抵接第一底板110，并使得第二侧面126与锯片平面共面。
本实施方式中，使第二底板120相对于第一底板110运动的凸轮部132是设置在锁紧机构的螺母136上的。在一种可能的实施方式中，可以将锁紧机构与凸轮部分开设置。比如，设置凸轮部与第二底板抵接，并可转动地连接于第一底板上。用户作用于凸轮部，带动第二底板相对于第一底板运动；当第二底板运动至第二位置，用户再作用于锁紧机构，锁紧第一底板与第二底板的相对位置，使得第二侧面与锯片平面共面。
在一种可能的实施方式中，也可对凸轮部做出改变，只要满足能够作用于第二底板，使得第二底板能够相对于第一底板运动即可。
本领域技术人员可以想到的是，本发明还可以有其他的实现方式，但只要其采用的技术精髓与本发明相同或相近似，或者任何基于本发明做出的变化和替换都在本发明的保护范围之内。

Claims (19)

  1. 一种切割工具，用于与导向装置配合进行切割，所述导向装置具有引导面，所述切割工具包括：
    壳体；
    马达，收容于所述壳体；
    传动机构，与所述马达连接，用于驱动锯片，所述锯片具有锯片平面；
    底板，与所述壳体连接，所述底板包括具有第一底面的第一底板、具有第二底面的第二底板，所述第二底板上设置有与所述锯片平面共面的抵靠面，所述抵靠面用于与所述引导面配合；
    其特征在于：所述第一底板与所述第二底板通过凸轮连接机构活动连接；
    所述凸轮连接机构包括与所述第二底板抵接的凸轮部，所述凸轮部可转动地连接于所述第一底板上；所述凸轮部转动，驱动所述第二底板相对于所述第一底板运动，使所述抵靠面露出。
  2. 如权利要求1所述的切割工具，其特征在于：所述凸轮连接机构包括与所述第一底板连接的连接轴；所述第二底板上开设有供所述连接轴穿过的通孔，所述连接轴穿过所述通孔与所述凸轮部连接。
  3. 如权利要求2所述的切割工具，其特征在于：所述连接轴围绕其自身轴线可转动地连接于所述第一底板上，所述连接轴穿过所述通孔与所述凸轮部固定连接。
  4. 如权利要求2所述的切割工具，其特征在于：所述连接轴与所述第一底板固定连接；所述凸轮连接机构还包括与所述连接轴转动配合的连接套，所述连接轴穿过所述通孔与所述连接套配合，所述凸轮部固定连接于所述连接套上。
  5. 如权利要求4所述的切割工具，其特征在于：所述连接轴被构造为螺栓，所述连接套被构造为螺母。
  6. 如权利要求1所述的切割工具，其特征在于：所述凸轮部的旋转轴线与所述锯片的旋转轴线平行。
  7. 如权利要求2所述的切割工具，其特征在于：所述切割工具还设置有引导装置，所述引导装置用于引导所述第二底板沿垂直于所述第二底面的方向相对于所述第一底板运动。
  8. 如权利要求7所述的切割工具，其特征在于：所述通孔的延伸方向被构造为 垂直于所述第二底面，所述引导装置包括所述通孔。
  9. 如权利要求1所述的切割工具，其特征在于：所述凸轮部固定连接有供用户操作的操作部。
  10. 如权利要求1所述的切割工具，其特征在于：所述第一底板与所述第二底板之间设置有保持装置，所述保持装置用于保持所述第一底板的第一底面与所述第二底板的第二底面共面。
  11. 如权利要求10所述的切割工具，其特征在于：所述保持装置包括弹簧，所述弹簧的一端抵接所述第一底板，所述弹簧的另一端抵接所述第二底板。
  12. 一种切割工具，所述切割工具包括：
    壳体；
    马达，收容于所述壳体；
    传动机构，与所述马达连接，用于驱动锯片，所述锯片具有锯片平面；
    底板，包括活动连接的第一底板与第二底板，所述壳体与所述第一底板连接；
    其特征在于：所述第二底板设置有抵靠面，所述第一底板与所述第二底板相对活动，使所述抵靠面露出；所述切割工具还包括锁紧机构，所述锁紧机构用于保持所述抵靠面与所述锯片平面共面。
  13. 如权利要求12所述的切割工具，其特征在于：所述锁紧机构包括螺栓以及与所述螺栓转动配合的螺母；所述螺栓与所述第一底板固定连接，所述第二底板开设有供所述螺栓穿过的通孔，所述螺栓穿过所述通孔与所述螺母配合。
  14. 如权利要求12所述的切割工具，其特征在于：所述锁紧机构包括螺栓以及与所述螺栓转动配合的螺母；所述螺母与所述第一底板固定连接，所述第二底板开设有供所述螺栓穿过的通孔，所述螺栓穿过所述通孔与所述螺母配合。
  15. 如权利要求12所述的切割工具，其特征在于：所述锁紧机构包括沿垂直于所述锯片平面的方向与所述第二底板抵接的锁紧凸轮，所述锁紧凸轮可转动地连接于所述第二底板上。
  16. 如权利要求15所述的切割工具，其特征在于：所述锁紧凸轮的旋转轴线平行于所述锯片平面。
  17. 如权利要求12所述的切割工具，其特征在于：所述第一底板与所述第二底 板相对平动。
  18. 如权利要求17所述的切割工具，其特征在于：所述切割工具还包括与所述第二底板抵接的凸轮部，所述凸轮部可转动地连接于所述第一底板上；所述凸轮部转动，驱动所述第二底板相对于所述第一底板平动。
  19. 一种切割工具，用于与导向装置配合进行切割，所述导向装置具有引导面，所述切割工具包括：
    壳体；
    马达，收容于所述壳体；
    传动机构，与所述马达连接，用于驱动锯片，所述锯片具有锯片平面；
    底板，所述底板包括具有第一底面的第一底板、具有第二底面的第二底板；
    其中，所述壳体与所述第一底板连接，所述第二底板上设置有与所述引导面配合的抵靠面，所述抵靠面与所述引导面配合时，所述第一底面由所述导向装置支撑，
    其特征在于：所述切割工具还设置有锁紧机构，在所述抵靠面与所述引导面配合时，所述锁紧机构用于保持所述抵靠面与所述锯片平面共面。
PCT/CN2019/090730 2018-06-11 2019-06-11 切割工具 WO2019238045A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013226795A (ja) * 2012-03-28 2013-11-07 Yoshikuni Okura 案内具
CN104874861A (zh) * 2014-02-27 2015-09-02 苏州宝时得电动工具有限公司 切割附件及切割工具
CN207026607U (zh) * 2016-07-15 2018-02-23 苏州宝时得电动工具有限公司 切割附件及切割工具
CN207326064U (zh) * 2016-07-01 2018-05-08 苏州宝时得电动工具有限公司 切割工具

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013226795A (ja) * 2012-03-28 2013-11-07 Yoshikuni Okura 案内具
CN104874861A (zh) * 2014-02-27 2015-09-02 苏州宝时得电动工具有限公司 切割附件及切割工具
CN207326064U (zh) * 2016-07-01 2018-05-08 苏州宝时得电动工具有限公司 切割工具
CN207026607U (zh) * 2016-07-15 2018-02-23 苏州宝时得电动工具有限公司 切割附件及切割工具

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