Electric circular saw with workpiece supporting and feeding structure

Abstract

The invention discloses an electric circular saw with a workpiece supporting and feeding structure, which comprises a machine table, an electric circular saw arranged on the machine table and a workpiece feeding mechanism arranged on the machine table, and a cutting part of the electric circular saw is arranged in a sliding manner relative to the machine table; the workpiece feeding mechanism can perform linear and oblique feeding, and a driving part does not need to swing along with the workpiece feeding mechanism during feeding. According to the electric circular saw, the tensioning rod is arranged to be matched with the U-shaped pressing plate, the tensioning rod and the U-shaped pressing plate are locked during tensioning, the angle of a workpiece placed on the rack is changed by rotating the angle of the adjusting rack during loosening, and after the angle is adjusted, the position of the electric circular saw body is adjusted in a sliding mode for adaptation; the driving structure is supported by the elastic structure to achieve compensation, so that the meshing process of the driving structure and the rack is continuous, the rack is driven to move for feeding when pushing feeding is needed, the whole process is convenient to control, multi-axis movement of the saw blade is not needed, machining errors caused by movement of the saw blade are avoided, in addition, linear feeding can be conducted, and the machining efficiency is improved. In the using process, selection can be conducted according to actual needs, and the adaptability is higher.

Description

Technical Field

[0001] The present invention relates to an electric circular saw, in particular to an electric circular saw with a workpiece supporting and feeding structure. Background Art

[0002] An electric circular saw is a tool that uses a single-phase series-excited motor as its power, and then drives the circular saw blade through a transmission mechanism to perform sawing operations. It has the characteristics of safety, reliability and high work efficiency.

[0003] Electric circular saws can not only cut wood, but can also be used to cut workpieces of various materials, such as metal and glass, after replacing the saw blade. When cutting, the electric circular saw is often set to a vertically flippable structure, and is fed and fixed in conjunction with a feeding mechanism, so that single-person operation can be achieved. However, the feeding method in the prior art is to set the clamp to a sliding structure, and the clamp clamps the workpiece and feeds it in a straight line. After feeding, cutting is achieved by the swing of the cutting tool.

[0004] However, there are the following problems with the swing adjustment of cutting tools: tool swing requires a four-axis or five-axis machine tool, which is expensive; in addition, tool swing often has low accuracy because it involves rotation, and tool tilting will introduce additional mechanical clearance, elastic deformation and vibration. Summary of the Invention

[0005] Based on the shortcomings of the prior art in that the adjustment of the tool is high in cost and more difficult in precision control, the present invention provides an electric circular saw with a workpiece support and feeding structure.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: An electric circular saw with a workpiece support and feeding structure includes a machine platform, an electric circular saw disposed on the machine platform, and a workpiece feeding mechanism disposed on the machine platform. The cutting portion of the electric circular saw is slidably disposed relative to the machine platform. The workpiece feeding mechanism includes: The rack is movably arranged on the machine table, with a strip hole extending along its length in the middle and external teeth on the lower side of one side wall; A limiting mechanism passes through the strip hole and the machine table to lock or unlock the rack. When fully unlocked, the rack can rotate along the limiting mechanism and slide along the extension direction of the strip hole. A driving mechanism is slidably mounted on the machine platform, and its output end is a driving gear meshing with the external teeth; An elastic compensation mechanism is provided on the machine platform and applies elastic force to the drive mechanism so that when the rack rotates, the drive gear always meshes with the external teeth under the action of the elastic force; The clamp is arranged at one end of the rack.

[0007] Preferably, the limiting mechanism includes: The U-shaped pressure plate has a flat bottom structure and its opening matches the top part of the rack. It is buckled on the top of the rack and has an embedded groove at the bottom; The tension rod comprises a limit head and a pull rod from top to bottom. The pull rod comprises a non-cylindrical section, a threaded section and a cylindrical section from top to bottom. The non-cylindrical section passes through the U-shaped pressure plate and extends from the middle of the embedded groove. The cylindrical section passes through the strip hole and has a first limit gear provided on its side wall. A locking nut, which is threadedly connected to the threaded section and is located in the embedded groove and presses the U-shaped pressure plate under the limit head; The tensioning cylinder has an output end rotatably connected to the bottom of the tensioning rod to pull downward to tighten the rack; The rotating mechanism has a second limiting gear at its output end. The first limiting gear is engaged with the second limiting gear and the two are always engaged when the first limiting gear is raised or lowered. When locked, it limits the tensioning rod to prevent the tensioning rod from rotating, and when it rotates to a set angle, the angle of the rack changes accordingly.

[0008] Preferably, the tensioning cylinder includes a U-shaped cylinder body fixed to the bottom of the machine, and the two vertical sections of the cylinder body are respectively provided with a first piston and a second piston. The piston heads of the first piston and the second piston divide the interior of the cylinder body into a first chamber, a second chamber and a third chamber. The first chamber and the third chamber are provided with pressure control pipelines. When the pressure control pipeline at the first chamber is pressurized and the pressure control pipeline in the third chamber is depressurized, the first piston moves downward to cause the limit head to press the U-shaped pressure plate against the top surface of the rack, and at the same time the third piston moves upward to press against the bottom surface of the machine to press and fix the rack; otherwise, the pressing and fixing state of the rack is released.

[0009] Preferably, the limiting mechanism further includes a point pad, which is arranged at the bottom of the machine platform. The tension rod passes through the pad and the top of the third piston rests on the pad after the third piston moves upward.

[0010] Preferably, the elastic compensation mechanism includes: Slide rails, including two parallel ones, are arranged at the bottom of the machine; A slide table, which is in sliding engagement with the two slide rails, and on which a driving mechanism is disposed; A mounting plate, which is arranged at the bottom of the machine; The compensation spring has one end fixed on the mounting plate and the other end fixed on the slide, and is always in a highly compressed state.

[0011] Preferably, the driving mechanism is a driving motor, and the output shaft of the driving motor and the tensioning rod are arranged side by side in the left-right direction.

[0012] Preferably, the clamp includes a clamping seat arranged at the end of the rack and a clamping cylinder arranged on the clamping seat, and a group of relative clamping plates are provided on the output end of the clamping cylinder and the clamping seat, and the clamping plates have arc-shaped clamping surfaces or V-shaped clamping surfaces.

[0013] Preferably, the electric circular saw comprises a base and a circular saw body with a saw blade disposed on the base and reset by a torsion spring. A gripping handle is provided on the circular saw body for gripping and pressing down to complete cutting.

[0014] Preferably, a telescopic driving device is provided on the machine platform, the base is slid left and right on the machine platform through a slide rail slider and is driven to slide by the driving device, which is a lockable motor push rod.

[0015] Preferably, a sliding sleeve is provided on the base, a sliding frame that slides leftward and rightward is slidably provided on the sliding sleeve, and the circular saw body is arranged on the sliding frame.

[0016] Compared with the prior art, the advantages of the present invention are as follows: the present application locks the tool when tightened by setting a tension rod and a U-shaped pressure plate, and changes the angle of the workpiece placed thereon by rotating the adjustment rack when loosening. After the angle is adjusted, the position of the electric circular saw body is adjusted by sliding to adapt, and its driving structure is supported by an elastic structure to achieve compensation so that the meshing process with the rack continues, so as to drive the rack to move and feed when it is necessary to advance the feeding. The whole process is easy to control, and there is no need for multi-axis movement of the saw blade, which avoids the processing error caused by the movement of the saw blade. In addition, it can also perform linear feeding, which can be selected according to actual needs during use, and has stronger adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings are merely schematic representations of the composition or structure of the depicted objects and may contain exaggerated representations. Furthermore, the drawings are not necessarily drawn to scale.

[0018] Figure 1 A perspective view of this application; Figure 2 A top view of the present application; Figure 3 This is a three-dimensional image of the machine (top); Figure 4 This is a three-dimensional image of the machine (bottom); Figure 5 It is a cross-sectional view of the machine; Figure 6 for Figure 4 Enlarged view of the middle Q; Figure 7 This is the schematic diagram of distance calculation after adjusting the angle; In the figure: 01, base; 02, sliding sleeve; 03, sliding frame; 04, electric circular saw body; 05, telescopic drive device; 06, drive motor; 061, output shaft; 10, machine table; 20, clamp; 300, pad; 301, rack; 3010, strip hole; 3011, external tooth; 3012, support seat; 302, tensioning rod; 3021, locking nut; 3022, first limiting gear; 303, U-shaped pressure plate; 304, drive gear; 305, tensioning cylinder; 3051, first chamber; 3052, second chamber; 3053, third chamber; 3054, first piston; 3055, second piston; 3061, mounting plate; 3062, compensation spring; 3063, slide rail; 3064, slide; 3071, rotating mechanism; 3072, second drive gear. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention. Example

[0020] Electric circular saw with workpiece support feed structure, such as Figure 1-6 As shown, The invention comprises a machine platform 10, an electric circular saw mounted on the machine platform 10, and a workpiece feeding mechanism mounted on the machine platform 10. The cutting portion of the electric circular saw is slidably mounted relative to the machine platform 10. The workpiece feeding mechanism comprises: The rack 301 is movably mounted on the table 10. A strip-shaped hole 3010 extending along its length is provided in its center. External teeth 3011 are provided on the lower side of one side wall. The strip-shaped hole 3010 is a waist-shaped hole and its width is the same as the outer diameter of the tension rod 302. The limiting mechanism passes through the strip-shaped hole 3010 and the machine table 10 and locks or unlocks the rack 301. When fully unlocked, the rack 301 can rotate along the limiting mechanism and slide along the extension direction of the strip-shaped hole 3010. When locked, the rack 301 is completely fixed. When unlocked, there are two unlocking steps: one is clamping unlocking formed by pulling down and pushing up, and the other is rotating unlocking; A driving mechanism is slidably mounted on the machine platform 10 , wherein the output end of the driving mechanism is a driving gear 304 meshing with the external teeth 3011 ; An elastic compensation mechanism is provided on the machine 10 and applies elastic force to the drive mechanism so that when the rack 301 rotates, the drive gear 304 is always engaged with the external teeth 3011 under the action of the elastic force; The clamp 20 is arranged at one end of the rack 301. Preferably, the clamp 20 is arranged at the rear end of the rack 301. The front end of the rack 301 is provided with a support seat 3012 with adjustable height. The two support the workpiece and keep the bottom surface of the workpiece against the top surface of the tensioning rod 302.

[0021] Preferably, the limiting mechanism includes: The U-shaped pressure plate 303 has a flat bottom structure and its opening matches the top portion of the rack 301. It is buckled on the top of the rack 301 and has an embedded groove at its bottom; The tension rod 302 comprises, from top to bottom, a stopper and a pull rod. The pull rod comprises, from top to bottom, a non-cylindrical section, a threaded section, and a cylindrical section. The non-cylindrical section passes through the U-shaped pressure plate 303 and extends from the middle of the embedded groove. The cylindrical section passes through the strip hole 3010 and has a first stopper gear 3022 provided on its sidewall. The locking nut 3021 is threadedly connected to the threaded section and is located in the embedded groove to press the U-shaped pressure plate 303 under the limit head; The tensioning cylinder 305 has an output end rotatably connected to the bottom of the tensioning rod 302 to pull downward to tighten the rack 301; The rotating mechanism 3071 has a second limiting gear 3072 at its output end. The first limiting gear 3022 is meshed with the second limiting gear 3072 and the two are always meshed when the first limiting gear 3022 is raised or lowered. When locked, it limits the tensioning rod 302 to prevent the tensioning rod 302 from rotating, and when it rotates to a set angle, the angle of the rack 301 changes accordingly. The thickness of the first limiting gear 3022 is much greater than the thickness of the second limiting gear 3072 to ensure that the two limiting gears of the first limiting gear 3022 only slide relative to each other and remain in a meshing state during the lifting process.

[0022] Preferably, the tensioning cylinder 305 includes a U-shaped cylinder body fixed to the bottom of the machine 10, and the two vertical sections of the cylinder body are respectively provided with a first piston 3054 and a second piston 3055, and the piston heads of the first piston 3054 and the second piston 3055 divide the interior of the cylinder body into a first chamber 3051, a second chamber 3052 and a third chamber 3053. The first chamber 3051 and the third chamber 3053 are provided with pressure control pipelines. When the pressure control pipeline at the first chamber 3051 is pressurized and the pressure control pipeline of the third chamber 3053 is depressurized, the first piston 3054 moves downward to cause the limit head to press the U-shaped pressure plate 303 against the top surface of the rack 301, and at the same time, the second piston 3055 moves upward to press against the bottom surface of the machine 10 to press and fix the rack 301; otherwise, the pressing and fixing state of the rack 301 is released. This solution achieves compression while tightening through the cylinder body and air pressure, and has the advantages of fast action and unified control. When locking, the third chamber 3053 and the first chamber 3051 are depressurized and pressurized respectively. The gas in the first chamber 3051 pushes the first piston 3054 downward to tighten the tensioning rod 302. At the same time, the gas in the second chamber 3052 plays a role in transmitting force and pushes up the second piston 3055 in the third chamber 3053 to firmly press the bottom surface of the machine 10.

[0023] Preferably, the limiting mechanism further includes a backing plate 300, which is disposed at the bottom of the machine platform 10. The tension rod 302 passes through the backing plate 300, and after the second piston 3055 moves upward, the top of the second piston 3055 abuts against the backing plate 300. The backing plate 300 is used to protect the bottom of the machine platform 10 from being damaged by the second piston 3055.

[0024] Preferably, the elastic compensation mechanism includes: Slide rails 3063, which include two parallel rails disposed at the bottom of the machine 10; A slide 3064, which slides with the two slide rails 3063 simultaneously, and a driving mechanism is arranged on it; A mounting plate 3061 is provided at the bottom of the machine 10; Compensation spring 3062, one end of which is fixed to mounting plate 3061 and the other end to slide 3064, is always in a highly compressed state. This solution, a specific embodiment of elastic compensation, ensures that when rack 301 rotates to adjust its direction, drive gear 304 automatically compensates and remains engaged with rack 301. The distance traveled by rack 301 can be controlled by controlling the number of revolutions of drive gear 304.

[0025] Preferably, the drive mechanism is a drive motor 06, with the output shaft 061 of the drive motor 06 and the tension rod 302 arranged side by side in the left-right direction. The output shaft 061 of the drive motor 06 passes through a bar-shaped adjustment hole on the machine platform 10 and is mounted with the drive gear 304. When arranged side by side, since the rack 301 rotates around the tension rod 302, the distance between the drive gear 304 and the tension rod 302 remains small during rotation, which can reduce the distance that the drive gear 304 needs to be adjusted and improve the stability of the drive.

[0026] Preferably, the fixture 20 includes a clamping seat mounted at the end of the rack 301 and a clamping cylinder mounted on the clamping seat. A pair of opposing clamping plates are provided at the output end of the clamping cylinder and the clamping seat. The clamping plates have arc-shaped or V-shaped clamping surfaces. The clamping seat in this embodiment can be used to clamp both cylindrical and block-shaped workpieces.

[0027] Preferably, the electric circular saw includes a base 01 and a circular saw body 04 with a saw blade disposed on the base 01 and reset by a torsion spring. A gripping handle is provided on the circular saw body 04 for gripping and pressing down to complete cutting.

[0028] Preferably, the machine 10 is provided with a telescopic drive 05. The base 01 is mounted on the machine 10 via a slide rail, which allows it to slide left and right. The telescopic drive 05 is driven to slide by the telescopic drive 05, which is a lockable motor push rod. In this embodiment, the position of the cutting saw blade is adjusted by moving the telescopic drive 05 according to a set distance to adapt to the change in cutting position after the angle is adjusted.

[0029] Preferably, a sliding sleeve 02 is provided on the base 01, a sliding frame 03 is slidably provided on the sliding sleeve 02 for sliding left and right movement, and the circular saw body 04 is provided on the sliding frame 03. When the circular saw body 04 needs to be moved for cutting, manual adjustment is adopted to cut a longer cutting line. For example, when the width is wider than the effective width of the cutting saw blade, the effective width is the maximum width of the cutting portion of the saw blade.

[0030] like Figure 7 As shown, the initial state is linear feeding; assuming the feed amount is B, the adjustment angle is a, and the distance from the tension rod 302 to the cutting point is D1, then tana= L / D1, the result of L is the distance adjusted to the left and right of the cutting point, cosa= D1 / D3, D3-D1=D4, D4+B is the amount required to be fed for the first time after adjustment, and the subsequent feed amount remains B.

[0031] The above describes the electric circular saw with a workpiece support and feed structure provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The above examples are intended only to facilitate understanding of the present invention and its core concepts. It should be noted that those skilled in the art will be able to make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications fall within the scope of protection of the claims.

Claims

1. An electric circular saw with a workpiece support and feeding structure, comprising a machine platform, an electric circular saw disposed on the machine platform, and a workpiece feeding mechanism disposed on the machine platform, characterized in that: The cutting part of the electric circular saw is arranged to slide relative to the machine table; the workpiece feeding mechanism includes: The rack is movably arranged on the machine table, with a strip hole extending along its length in the middle and external teeth on the lower side of one side wall; A limiting mechanism passes through the strip hole and the machine table to lock or unlock the rack. When fully unlocked, the rack can rotate along the limiting mechanism and slide along the extension direction of the strip hole. A driving mechanism is slidably mounted on the machine platform, and its output end is a driving gear meshing with the external teeth; An elastic compensation mechanism is provided on the machine platform and applies elastic force to the drive mechanism so that when the rack rotates, the drive gear always meshes with the external teeth under the action of the elastic force; The clamp is arranged at one end of the rack.

2. The electric circular saw with a workpiece support and feeding structure according to claim 1, characterized in that: The limiting mechanism includes: The U-shaped pressure plate has a flat bottom structure and its opening matches the top part of the rack. It is buckled on the top of the rack and has an embedded groove at the bottom; The tension rod comprises a limit head and a pull rod from top to bottom. The pull rod comprises a non-cylindrical section, a threaded section and a cylindrical section from top to bottom. The non-cylindrical section passes through the U-shaped pressure plate and extends from the middle of the embedded groove. The cylindrical section passes through the strip hole and has a first limit gear provided on its side wall. A locking nut, which is threadedly connected to the threaded section and is located in the embedded groove and presses the U-shaped pressure plate under the limit head; The tensioning cylinder has an output end rotatably connected to the bottom of the tensioning rod to pull downward to tighten the rack; The rotating mechanism has a second limiting gear at its output end. The first limiting gear is engaged with the second limiting gear and the two are always engaged when the first limiting gear is raised or lowered. When locked, it limits the tensioning rod to prevent the tensioning rod from rotating, and when it rotates to a set angle, the angle of the rack changes accordingly.

3. The electric circular saw with a workpiece support and feeding structure according to claim 2, wherein: The tensioning cylinder includes a U-shaped cylinder body fixed to the bottom of the machine platform. The two vertical sections of the cylinder body are respectively provided with a first piston and a second piston. The piston heads of the first piston and the second piston divide the interior of the cylinder body into a first chamber, a second chamber and a third chamber. The first chamber and the third chamber are provided with pressure control pipelines. When the pressure control pipeline at the first chamber is pressurized and the pressure control pipeline of the third chamber is reduced, the first piston moves downward to cause the limit head to press the U-shaped pressure plate against the top surface of the rack. At the same time, the third piston moves upward to press against the bottom surface of the machine platform to press and fix the rack; otherwise, the rack is pressed and fixed.

4. The electric circular saw with a workpiece support and feeding structure according to claim 3, wherein: The limiting mechanism also includes a point pad, which is arranged at the bottom of the machine platform. The tension rod passes through the pad and the top of the third piston rests on the pad after the third piston moves upward.

5. The electric circular saw with a workpiece support and feeding structure according to claim 2, wherein: The elastic compensation mechanism includes: Slide rails, including two parallel ones, are arranged at the bottom of the machine; A slide table, which is in sliding engagement with the two slide rails, and on which a driving mechanism is disposed; A mounting plate, which is arranged at the bottom of the machine; The compensation spring has one end fixed on the mounting plate and the other end fixed on the slide, and is always in a highly compressed state.

6. The electric circular saw with a workpiece support and feeding structure according to claim 5, characterized in that: The driving mechanism is a driving motor, and the output shaft of the driving motor and the tensioning rod are arranged side by side in the left and right directions.

7. The electric circular saw with a workpiece support and feeding structure according to claim 1, wherein: The clamp includes a clamping seat arranged at the end of the rack and a clamping cylinder arranged on the clamping seat. A group of opposite clamping plates are provided on the output end of the clamping cylinder and the clamping seat. The clamping plates have arc-shaped clamping surfaces or V-shaped clamping surfaces.

8. The electric circular saw with a workpiece support and feeding structure according to claim 1, wherein: The electric circular saw comprises a base and a circular saw body with a saw blade which is arranged on the base and reset by a torsion spring. A gripping handle is provided on the circular saw body for gripping and pressing down to complete cutting.

9. The electric circular saw with a workpiece support and feeding structure according to claim 8, wherein: A telescopic driving device is provided on the machine platform. The base is slid left and right on the machine platform through a slide rail slider and is driven to slide by the driving device. The driving device is a lockable motor push rod.

10. The electric circular saw with a workpiece support and feeding structure according to claim 9, wherein: A sliding sleeve is provided on the base, a sliding frame which slides leftward and rightward is slidably provided on the sliding sleeve, and the circular saw body is arranged on the sliding frame.

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