Electric circular saw with workpiece support feed structure

Abstract

The application discloses an electric circular saw with workpiece support 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 the cutting part of the electric circular saw is arranged in a sliding mode relative to the machine table; the workpiece feeding mechanism can perform linear and oblique feeding, and the driving part does not need to swing during feeding. The application is characterized in that the tensioning rod and the U-shaped pressing plate are matched, the workpiece is locked when being tensioned, the angle of the workpiece placed on the toothed rack is changed by rotating the toothed rack when being loosened, the position of the electric circular saw body is adjusted by sliding after the angle is adjusted, the driving structure is supported by the elastic structure to realize compensation so that the toothed rack is engaged continuously, the toothed rack is driven to move to feed the workpiece when the workpiece needs to be fed, the whole process is controlled conveniently, the saw blade does not need to move in multiple axes, the machining error caused by the movement of the saw blade is avoided, in addition, the workpiece can also be fed in a linear mode, and the workpiece can be selected according to actual needs during use, so that the adaptability is higher.

Description

TECHNICAL FIELD

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

[0002] An electric circular saw is a tool powered by a single-phase series motor, which drives a circular saw blade to perform sawing operations, and has the characteristics of safety and reliability, high work efficiency, etc.

[0003] The electric circular saw can not only cut wood, but also can cut workpieces of various materials such as metal and glass after replacing the saw blade. During cutting, the electric circular saw is often set as a vertical flip structure, and is matched with a feeding mechanism to feed and fix the workpiece, so that single-person operation can be realized. However, in the prior art, the feeding mechanism is a sliding structure, and the workpiece is fed in a straight line after being clamped by the clamp. The cutting is realized by swinging the cutting tool.

[0004] However, the swinging adjustment of the cutting tool has the following problems: the tool swing requires a four-axis or five-axis machine tool, which is high in cost; in addition, the tool swing has low precision due to rotation, and the tool inclination introduces additional mechanical clearance, elastic deformation and vibration. SUMMARY

[0005] Based on the problems of high cost and difficult precision control in the prior art by adjusting the tool, the present application provides an electric circular saw with a workpiece supporting and feeding structure.

[0006] The technical scheme adopted by the present application to solve the above technical problems is:

[0007] The electric circular saw with a workpiece supporting and feeding structure comprises a machine table, an electric circular saw arranged on the machine table, and a workpiece feeding mechanism arranged on the machine table. The cutting part of the electric circular saw is arranged in sliding mode relative to the machine table. The workpiece feeding mechanism comprises:

[0008] A rack is movably arranged on the machine table top. A strip-shaped hole extending along the length direction of the rack is arranged in the middle of the rack. An external tooth is arranged on the lower side of the side wall of one side of the rack.

[0009] A limiting mechanism is arranged to pass through the strip-shaped hole and lock or unlock the rack with the machine table. When the limiting mechanism is completely unlocked, the rack can rotate and slide along the extension direction of the strip-shaped hole.

[0010] A driving mechanism is arranged in sliding mode on the machine table. The output end of the driving mechanism is a driving gear meshing with the external tooth.

[0011] An elastic compensation mechanism is arranged on the machine table. The elastic compensation mechanism applies an elastic force to the driving mechanism, so that the driving gear is always meshed with the external tooth under the action of the elastic force when the rack rotates.

[0012] A clamp is arranged at one end of the rack.

[0013] Preferably, the limiting mechanism comprises:

[0014] A U-shaped pressing plate, which is flat-bottomed and has an opening matching the top of the rack, is inverted on the top of the rack, and has a slot at the bottom;

[0015] A tension rod, which comprises a limiting head and a rod in sequence from top to bottom, and the rod comprises a non-cylindrical segment, a threaded segment and a cylindrical segment in sequence from top to bottom, the non-cylindrical segment penetrates the U-shaped pressing plate and extends from the middle of the slot, and the cylindrical segment penetrates the strip-shaped hole and has a first limiting gear on the side wall;

[0016] A locking nut, which is threadedly connected to the threaded segment and is located in the slot and presses the U-shaped pressing plate under the limiting head;

[0017] A tension cylinder, which is rotationally connected to the bottom of the tension rod to pull down and press the rack;

[0018] A rotating mechanism, which has a second limiting gear on the output end, and the first limiting gear and the second limiting gear are always engaged when the first limiting gear is lifted, and when locked, the tension rod is limited to prevent rotation, and when rotated to a set angle, the angle of the rack changes accordingly.

[0019] Preferably, the tension cylinder comprises a U-shaped cylinder body fixed to the bottom of the machine table, two vertical segments 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 inner part 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 at the third chamber is depressurized, the first piston moves downward to press the U-shaped pressing plate against the top surface of the rack, and at the same time, the second piston moves upward to abut against the bottom surface of the machine table to press and fix the rack; conversely, the press and fix state of the rack is released.

[0020] Preferably, the limiting mechanism further comprises a backing plate, which is arranged at the bottom of the machine table, and the tension rod penetrates the backing plate and the top of the second piston abuts against the backing plate after the second piston moves upward.

[0021] Preferably, the elastic compensation mechanism comprises:

[0022] A slide rail, which comprises two parallel slide rails arranged at the bottom of the machine table;

[0023] A slide table, which is slidably fitted with the two slide rails and has a driving mechanism arranged thereon;

[0024] A mounting plate, which is arranged at the bottom of the machine table;

[0025] A compensation spring is fixed at one end to the mounting plate and at the other end to the sliding table and is always in a highly compressed state.

[0026] As a preference, the driving mechanism is a driving motor, and the output shaft of the driving motor is arranged side by side with the tensioning rod in the left-right direction.

[0027] As a preference, the clamp comprises a clamping seat arranged at the end of the rack and a clamping cylinder arranged on the clamping seat, and a set of opposite clamping plates are arranged on the output end of the clamping cylinder and the clamping seat, and the clamping plates have a circular-arc clamping surface or a V-shaped clamping surface.

[0028] As a preference, the electric circular saw comprises a base and a circular saw body with a saw blade arranged on the base and reset by a torsion spring, and a holding handle is arranged on the circular saw body and used for holding down to complete cutting.

[0029] As a preference, the machine table is provided with a telescopic driving device, the base is arranged on the machine table through a slide rail and a slide block and is driven to slide by the driving device, and the driving device is a lockable motor push rod.

[0030] As a preference, the base is provided with a sliding sleeve seat, a sliding frame sliding in the left-right direction is slidingly arranged on the sliding sleeve seat, and the circular saw body is arranged on the sliding frame.

[0031] Compared with the prior art, the application has the following advantages: the tensioning rod and the U-shaped pressing plate are arranged in cooperation, the workpiece is locked when being tensioned, the angle of the workpiece placed on the rack is changed by rotating the rack to adjust the angle when being loosened, the position of the electric circular saw body is adjusted to adapt after the angle is adjusted, the driving structure is supported by the elastic structure to realize compensation so that the driving structure is engaged with the rack continuously, the rack is driven to move to feed the material when feeding is needed, the whole process is controlled conveniently, the multi-axis movement of the saw blade is not needed, the processing error caused by the movement of the saw blade is avoided, in addition, the straight-line feeding can be realized, and the selection can be made according to the actual needs in the use process, and the adaptability is stronger. BRIEF DESCRIPTION OF DRAWINGS

[0032] The application will be further described in detail below in combination with the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments and thus should not be regarded as a limitation on the scope of the application. In addition, unless specifically indicated, the drawings only schematically show the composition or structure of the described objects and can contain exaggerated display, and the drawings are not necessarily drawn to scale.

[0033] Figure 1 is a perspective view of the application;

[0034] Figure 2 is a top view of the application;

[0035] Figure 3 is a perspective view of the machine stand (top);

[0036] Figure 4 is a perspective view of the machine stand (bottom);

[0037] Figure 5 is a sectional view of the machine stand;

[0038] Figure 6 is Figure 4 is an enlarged view of the middle Q;

[0039] Figure 7 is a schematic diagram of the distance calculation after adjusting the angle;

[0040] In the figure: 01, base; 02, sliding sleeve; 03, sliding frame; 04, electric circular saw body; 05, telescopic driving device; 06, driving motor; 061, output shaft; 10, machine stand; 20, clamp; 300, backing plate; 301, rack; 3010, bar hole; 3011, external teeth; 3012, support seat; 302, tensioning rod; 3021, locking nut; 3022, first limit gear; 303, U-shaped clamp plate; 304, driving 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 table; 3071, rotating mechanism; 3072, second driving gear. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is merely illustrative, exemplary, and should not be construed as limiting the scope of protection of the present application. EMBODIMENT

[0042] An electric circular saw with a workpiece support and feeding structure, as shown in Figures 1-6 ,

[0043] includes a machine stand 10, an electric circular saw disposed on the machine stand 10, and a workpiece feeding mechanism disposed on the machine stand 10, the cutting part of the electric circular saw is slidingly disposed relative to the machine stand 10; the workpiece feeding mechanism includes:

[0044] a rack 301 movably disposed on the table top of the machine stand 10, with a bar hole 3010 extending along its length direction in the middle, and external teeth 3011 disposed on the lower side of the side wall on one side, the bar hole 3010 is a waist-shaped hole and its width is the same as the outer diameter of the tensioning rod 302;

[0045] A limiting mechanism which is locked or unlocked with the machine table 10 and the rack 301 through the strip hole 3010. When unlocked, the rack 301 can rotate and slide along the strip hole 3010. When locked, the rack 301 is completely fixed. The unlocking process has two steps: one is the clamping unlocking formed by pulling down and pushing up, and the other is the rotating unlocking.

[0046] A driving mechanism which is slidingly arranged on the machine table 10 and has a driving gear 304 engaged with the external teeth 3011.

[0047] An elastic compensation mechanism which is arranged on the machine table 10 and applies an elastic force to the driving mechanism, so that the driving gear 304 is always engaged with the external teeth 3011 when the rack 301 rotates.

[0048] A clamp 20 which is arranged at one end of the rack 301, preferably at the rear end of the rack 301. The front end of the rack 301 is provided with an adjustable height support seat 3012. Both the clamp 20 and the support seat 3012 support the workpiece and keep the bottom surface of the workpiece in contact with the top surface of the tension rod 302.

[0049] As preferred, the limiting mechanism comprises:

[0050] A U-shaped pressing plate 303 which has a flat bottom structure and an opening matching the top part of the rack 301. The U-shaped pressing plate 303 is invertedly arranged on the top of the rack 301 and has an embedded groove at the bottom.

[0051] A tension rod 302 which comprises a limiting 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 penetrates through the U-shaped pressing plate 303 and extends from the middle of the embedded groove. The cylindrical section penetrates through the strip hole 3010 and has a first limiting gear 3022 on the side wall.

[0052] A locking nut 3021 which is threadedly connected to the threaded section and located in the embedded groove to press the U-shaped pressing plate 303 below the limiting head.

[0053] A tension cylinder 305 which is rotationally connected to the bottom of the tension rod 302 to pull down and press the rack 301.

[0054] A rotating mechanism 3071 which has a second limiting gear 3072 on the output end. The first limiting gear 3022 is engaged with the second limiting gear 3072 and always engaged when the first limiting gear 3022 is lifted or lowered. When locked, the rotating mechanism 3071 limits the rotation of the tension rod 302. When rotated to a certain angle, the angle of the rack 301 changes. The thickness of the first limiting gear 3022 is much greater than that of the second limiting gear 3072 to ensure that the two limiting gears only slide relative to each other and remain engaged during the lifting process.

[0055] As preferred, the tensioning cylinder 305 comprises a U-shaped cylinder body fixed to the bottom of the machine table 10, two vertical sections of the cylinder body are respectively provided with a first piston 3054 and a second piston 3055, the piston heads of the first piston 3054 and the second piston 3055 divide the inside 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 make the limiting head press the U-shaped pressing plate 303 against the top surface of the rack 301, at the same time, the second piston 3055 moves upward to press against the bottom surface of the machine table 10 to press and fix the rack 301; conversely, the press and fix state of the rack 301 is released. The scheme realizes pressing while tensioning through the cylinder body cooperating with air pressure, has the advantages of fast action and unified control, when locking, the third chamber 3053 and the first chamber 3051 are respectively depressurized and pressurized, the gas in the first chamber 3051 pushes the first piston 3054 downward to tension the tensioning rod 302, at the same time, the gas in the second chamber 3052 plays the role of force transmission to lift the second piston 3055 in the third chamber 3053 to press against the bottom surface of the machine table 10.

[0056] As preferred, the limiting mechanism further comprises a backing plate 300, the backing plate 300 is arranged on the bottom of the machine table 10, the tensioning rod 302 passes through the backing plate 300 and the top of the second piston 3055 abuts against the backing plate 300 after the second piston 3055 moves upward. The backing plate 300 is used for protecting the bottom of the machine table 10 from being damaged by the second piston 3055.

[0057] As preferred, the elastic compensation mechanism comprises:

[0058] a slide rail 3063, which comprises two parallel slide rails arranged on the bottom of the machine table 10;

[0059] a slide table 3064, which simultaneously slides with the two slide rails 3063, and a driving mechanism is arranged on the slide table 3064;

[0060] a mounting plate 3061, which is arranged on the bottom of the machine table 10;

[0061] a compensation spring 3062, one end of which is fixed to the mounting plate 3061 and the other end of which is fixed to the slide table 3064, and the compensation spring 3062 is always in a highly compressed state. The scheme is a specific scheme for elastic compensation, through which it can be ensured that the driving gear 304 is always in meshing with the rack 301 after the driving gear 304 is automatically supplemented when the rack 301 rotates to adjust the direction, and then the distance value of the rack 301 advancing can be controlled by controlling the number of rotations of the driving gear 304.

[0062] As preferred, the driving mechanism is a driving motor 06, the output shaft 061 of the driving motor 06 is arranged side by side with the tension rod 302 in the left-right direction and the output shaft 061 of the driving motor 06 passes through a strip-shaped adjusting hole on the machine table 10 and installs a driving gear 304. When arranged side by side, since the rack 301 rotates around the tension rod 302, the distance between the driving gear 304 and the tension rod 302 is kept small during rotation, which can reduce the distance of the driving gear 304 to be adjusted and improve the stability of driving.

[0063] As preferred, the clamp 20 includes a clamping seat arranged at the end of the rack 301 and a clamping cylinder arranged on the clamping seat, a set of opposite clamping plates are arranged on the output end of the clamping cylinder and the clamping seat, and the clamping plates have a circular arc clamping surface or a V-shaped clamping surface. The clamping seat in this scheme can be used to press cylindrical workpieces or clamp block-shaped workpieces, etc.

[0064] As preferred, the electric circular saw includes a base 01 and a circular saw body 04 with a saw blade arranged on the base 01 and reset by a torsional spring, and the circular saw body 04 is provided with a holding handle for holding and pressing down to complete cutting.

[0065] As preferred, the machine table 10 is provided with a telescopic driving device 05, the base 01 is arranged on the machine table 10 through a slide rail slider and slides left and right and is driven to slide by the telescopic driving device 05, and the telescopic driving device 05 is a lockable motor push rod. In this scheme, the position of the cutting saw blade is adjusted by moving according to the set distance through the telescopic driving device 05 to adapt to the change of the cutting position after adjusting the angle.

[0066] As preferred, the base 01 is provided with a sliding sleeve 02, the sliding sleeve 02 is provided with a sliding frame 03 that slides left and right, and the circular saw body 04 is arranged on the sliding frame 03. When it is necessary to move the circular saw body 04 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 part of the saw blade.

[0067] As shown in Figure 7 the initial state is straight-line feeding; assuming that the feeding amount B is a, the angle of adjustment is a, the distance from the tension rod 302 to the cutting point is D1, then tan a = L / D1, the result of L is the distance of left-right adjustment of the cutting point, cos a = D1 / D3, D3-D1=D4, and D4+B is the first feeding amount after adjustment, and the subsequent feeding amount is still B.

[0068] The above describes the electric circular saw with the workpiece supporting and feeding structure provided by the present application, and the principle and implementation mode of the present application are described by using specific examples, and the above description of the examples is only used for helping to understand the present application and the core idea. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principle of the present application, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. An electric circular saw with a workpiece support and feeding structure, comprising a machine base, an electric circular saw mounted on the machine base, and a workpiece feeding mechanism mounted on the machine base, characterized in that, The cutting section of the circular saw is slidably positioned relative to the machine base; the workpiece feeding mechanism includes: A rack is movably mounted on the machine table, with a strip-shaped hole extending along its length in the middle and external teeth on the lower side of one side wall. The limiting mechanism passes through the strip hole and the machine base 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. The drive mechanism is slidably mounted on the machine base, and its output end is a drive gear that meshes with external teeth; The elastic compensation mechanism is set on the machine base 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. A clamp is located at one end of the rack.

2. The electric circular saw with a workpiece support and feed 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 inverted on the top of the rack and has a groove at its bottom. The tensioning rod includes a limiting head and a pull rod from top to bottom. The pull rod includes 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 out from the middle of the embedded groove. The cylindrical section passes through the strip hole and its side wall is provided with a first limiting gear. A locking nut, whose threaded connection is to the threaded section and is located in the groove, presses the U-shaped pressure plate under the limiting head; The tensioning cylinder has its output end rotatably connected to the bottom of the tensioning rod to pull it downward and press the rack together; The rotating mechanism has a second limiting gear at its output end. The first limiting gear meshes with the second limiting gear, and the two are always meshed when the first limiting gear is raised or lowered. When locked, it limits the tension rod to prevent the tension 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 feed structure according to claim 2, characterized in that, The tensioning cylinder includes a U-shaped cylinder body fixed to the bottom of the machine base. The two vertical sections of the cylinder body are respectively equipped 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 equipped with pressure control lines. When the pressure control line in the first chamber increases the pressure while the pressure control line in the third chamber decreases the pressure, the first piston moves down to make the limiting head press the U-shaped pressure plate against the top surface of the rack. At the same time, the second piston moves up to press against the bottom surface of the machine base and presses the rack into place. Conversely, the rack is released from its pressed and fixed state.

4. The electric circular saw with a workpiece support and feed structure according to claim 3, characterized in that, The limiting mechanism also includes a pad, which is located at the bottom of the machine. The tension rod passes through the pad and the top of the second piston abuts against the pad after the second piston moves upward.

5. The electric circular saw with a workpiece support and feed structure according to claim 2, characterized in that, Flexible compensation mechanisms include: The slide rail consists of two parallel rails arranged at the bottom of the machine. A slide table that slides simultaneously with two slide rails, and a drive mechanism is mounted on it; Mounting plate, which is located at the bottom of the machine base; The compensating spring is fixed at one end to the mounting plate and at the other end to the slide, and it is always in a highly compressed state.

6. The electric circular saw with a workpiece support and feed structure according to claim 5, characterized in that, The drive mechanism is a drive motor, and the output shaft of the drive motor and the tension rod are arranged side by side in the left and right direction.

7. The electric circular saw with a workpiece support and feed structure according to claim 1, characterized in that, The fixture includes a clamping seat located at the end of the rack and a clamping cylinder located on the clamping seat. The output end of the clamping cylinder and the clamping seat are provided with a set of opposing clamping plates, which have an arc-shaped clamping surface or a V-shaped clamping surface.

8. The electric circular saw with a workpiece support and feed structure according to claim 1, characterized in that, The electric circular saw includes a base and a circular saw body with a saw blade mounted on the base and reset by a torsion spring. The circular saw body is provided with a grip handle for gripping and pressing down to complete the cut.

9. The electric circular saw with a workpiece support and feed structure according to claim 8, characterized in that, The machine base is equipped with a telescopic drive device. The base is mounted on the machine base by sliding left and right via a slide rail slider and is driven to slide by the drive device, which is a lockable motor push rod.

10. The electric circular saw with a workpiece support and feed structure according to claim 9, characterized in that, The base is equipped with a sliding sleeve, and a sliding frame that slides left and right is mounted on the sliding sleeve. The circular saw body is mounted on the sliding frame.

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