A power tower H-shaped steel cutting device

Abstract

The present application relates to a kind of steel cutting device, especially a kind of electric power tower H-shaped steel cutting device.It includes support frame, support column, electric sliding rail, support rod, rotary motor, circular saw blade, conveying shaft, connecting piece and first elastic piece, support frame top is symmetrically provided with support column before and after, support rod is slidably connected between two support columns, electric sliding rail is arranged in rear support column, the moving part of electric sliding rail is connected with support rod, rotary motor is arranged on support rod, the output shaft of rotary motor is connected with circular saw blade, conveying shaft is rotatably connected on the top of support frame, connecting piece is arranged on the front and rear ends of conveying shaft, first elastic piece is arranged in connecting piece.The present application is driven by screw to realize the accurate adjustment of cutting length by the linkage design of blocking plate, scale and scale pointer, effectively solve the error problem caused by traditional manual measurement.

Description

TECHNICAL FIELD

[0001] The present application relates to a steel cutting device, in particular to a power tower H-shaped steel cutting device. BACKGROUND

[0002] The power tower H-shaped steel cutting device is a high-efficiency special-purpose device designed for the fixed-length cutting of H-shaped steel in the construction of power towers. In modern power transmission systems, power towers play a crucial role as they not only support high-voltage transmission lines but also withstand various harsh weather conditions. Therefore, the quality of tower construction is of utmost importance, and H-shaped steel, as the core material of the tower's main structure, is self-evidently important.

[0003] Some existing power tower H-shaped steel cutting devices mainly rely on manual measurement of the length of H-shaped steel that needs to be cut during the cutting process. Manual measurement is prone to errors, resulting in inconsistent cutting lengths and affecting subsequent assembly. Some power tower H-shaped steel cutting devices are designed with a blocking plate. After the H-shaped steel hits the blocking plate, the distance between the blocking plate and the circular saw blade is measured as the basis for cutting the H-shaped steel. However, since the H-shaped steel and the blocking plate are in hard contact, the H-shaped steel will rebound under the action of the reverse force after hitting the blocking plate. If the distance between the blocking plate and the circular saw blade is still used as the measurement basis at this time, it will cause cutting deviation of the H-shaped steel. SUMMARY

[0004] In order to overcome the shortcomings in the background art that some power tower H-shaped steel cutting devices rely on manual measurement of the length of H-shaped steel that needs to be cut, and manual measurement is prone to errors, and some power tower H-shaped steel cutting devices are prone to cutting deviation, the purpose of the present application is to provide a power tower H-shaped steel cutting device.

[0005] The technical scheme of the present application is: a power iron tower H-shaped steel cutting device, comprising a support frame, a support column, an electric sliding rail, a support rod, a rotary motor, a circular saw blade, a conveying shaft, a connecting piece, a gear, a first elastic piece, a rack, a connecting rod, a blocking plate, a screw rod, a scale and a scale pointer, the top of the support frame is symmetrically provided with the support column in front and back, the support rod is slidably connected between the two support columns, the rear support column is provided with the electric sliding rail, the moving part of the electric sliding rail is connected with the support rod, the rotary motor is arranged on the support rod, the output shaft of the rotary motor is connected with the circular saw blade, the top of the support frame is rotatably connected with the conveying shaft, the conveying shaft is provided with the connecting piece at the front and rear ends, the connecting piece is provided with the first elastic piece, the connecting piece is provided with the gear, the left end of the support rod is symmetrically provided with the connecting rod in front and back, the bottom end of the connecting rod is connected with the rack, the rack is meshed with the gear, the top of the support frame is slidably connected with the blocking plate on the right side, the top of the support frame is rotatably connected with the screw rod on one side, the screw rod is threadedly connected with the blocking plate, the front end of the support frame is provided with the scale, the front end of the blocking plate is provided with the scale pointer, and the scale pointer indicates the scale.

[0006] As preferred, it further comprises a water tank, a water storage pipe, a piston rod, a first water pipe, a second water pipe, an inflatable water bag, a spray head and a one-way valve, the top of the support column is provided with the water tank, the two support columns are each provided with a rectangular through hole, the ends of the two support columns away from each other are each provided with the water storage pipe, the water storage pipe and the water tank are connected with the second water pipe, the second water pipe is provided with the one-way valve, the piston rod is slidably connected in the water storage pipe, the two piston rods are connected with the support rod through the rectangular through hole, the bottom end of the water storage pipe is connected with the first water pipe, the other end of the first water pipe is connected with the inflatable water bag, the other end of the inflatable water bag is connected with the spray head, and the spray head is connected with the protective shell on the circular saw blade.

[0007] As preferred, it further comprises a pressing rod, a square pressing block and a spring, the left and right ends of the support rod are each slidably connected with the pressing rod, the bottom end of the pressing rod is connected with the square pressing block, and the square pressing block and the support rod are connected with the spring.

[0008] As preferred, it further comprises a U-shaped extrusion block, a push rod, a second elastic piece and a cylindrical protrusion, the top of the support frame is symmetrically slidably connected with the U-shaped extrusion block in front and back, the U-shaped extrusion block and the support frame are connected with the second elastic piece, the inside of the U-shaped extrusion block is symmetrically provided with the cylindrical protrusion in left and right, the support rod is symmetrically provided with the push rod in front and back, and the push rod is in contact with the cylindrical protrusion.

[0009] As preferred, it further comprises a roller way, a driving motor and a belt pulley transmission piece, the top of the support frame is sequentially and interval rotatably connected with the roller way from left to right, the left side of the support frame is connected with the driving motor, the output shaft of the driving motor is connected with the leftmost roller way, and the adjacent roller ways are connected with the belt pulley transmission piece.

[0010] As preferred, the wheel is further included, the wheel is rotatably connected to the four corners of the bottom end of the support frame, and a stop switch is arranged on the wheel.

[0011] As preferred, the protective shell is further included, the protective shell is arranged on the front and rear ends of the support frame.

[0012] As preferred, the rotating disc and the sponge sleeve are further included, the rotating disc is connected to the right end of the screw rod, a handle is arranged at the eccentric position of the right end of the rotating disc, and the sponge sleeve is sleeved outside the handle of the rotating disc.

[0013] As preferred, the guide rod is further included, the guide rod is arranged at the top end of the rear side of the support frame, and the guide rod is slidably connected to the blocking plate.

[0014] As preferred, the connecting piece is composed of two connecting shafts, one connecting shaft is fixedly connected to the conveying shaft, and the other connecting shaft is rotatably connected to the support frame, the two connecting shafts abut against each other, semicircular protrusions are arranged at the ends of the two connecting shafts close to each other in the circumferential direction, the first elastic member is arranged in the connecting shaft connected to the support frame, the scales on the scale ruler gradually increase from left to right, and the leftmost end of the scale ruler is flush with the circular saw blade.

[0015] Beneficial effects: the linkage design of the screw rod driving the blocking plate, the scale ruler and the scale pointer realizes accurate adjustment of the cutting length, effectively solves the error problem caused by traditional manual measurement, the design that the leftmost end of the scale ruler is aligned with the circular saw blade ensures the consistency of the measurement reference and the cutting position, and avoids cutting deviation caused by the deviation of the measurement reference; the unique gear and rack transmission and the design of the connecting piece make the correction of the H-shaped steel automatically completed during the downward movement of the support rod; after the H-shaped steel contacts the blocking plate and rebounds, the connecting piece drives the conveying shaft, so that the H-shaped steel contacts the blocking plate, automatically compensates the slight displacement caused by the contact, and completely solves the rebound error problem caused by traditional hard contact. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the wheel and other components of the present application.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the roller and other components of the present application.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the blocking plate and other components of the present application.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the support column and other components of the present application.

[0021] Figure 6The figure is a perspective view of the connecting piece of the present application.

[0022] Figure 7 The figure is a perspective view of the U-shaped extrusion block of the present application.

[0023] Figure 8 The figure is a perspective view of the push rod of the present application.

[0024] Figure 9 The figure is a perspective view of the cylindrical protrusion of the present application.

[0025] Figure 10 The figure is a perspective view of the pressing rod of the present application.

[0026] Figure 11 The figure is a perspective view of the water tank of the present application.

[0027] Markings in the figure: 1-support frame, 101-wheel, 102-protection shell, 3-roller, 301-driving motor, 302-belt wheel transmission, 4-support column, 401-electric sliding rail, 402-supporting rod, 403-rotary motor, 404-circular saw blade, 405-rectangular through hole, 5-conveying shaft, 501-connecting piece, 503-gear, 513-first elastic piece, 504-rack, 514-connecting rod, 6-blocking plate, 601-screw rod, 602-guiding rod, 603-rotary disc, 604-ruler, 614-ruler pointer, 605-sponge cover, 7-water tank, 701-water storage pipe, 702-piston rod, 703-first water pipe, 713-second water pipe, 704-inflatable water bag, 705-sprinkler, 706-one-way valve, 8-pressing rod, 801-square pressing block, 802-spring, 9-U-shaped extrusion block, 902-push rod, 903-second elastic piece, 904-cylindrical protrusion. DETAILED DESCRIPTION

[0028] The present application is further described below in combination with the figures and specific embodiments.

[0029] A power tower H-shaped steel cutting device, such as Figures 1-8As shown, including support frame 1, support column 4, electric slide rail 401, support rod 402, rotary motor 403, circular saw blade 404, conveying shaft 5, connecting piece 501, gear 503, first elastic member 513, rack 504, connecting rod 514, blocking plate 6, screw rod 601, scale 604 and scale pointer 614, the top of the support frame 1 is symmetrically provided with support column 4, the support rod 402 is slidably connected between the two support columns 4, the rear support column 4 is provided with the electric slide rail 401, the moving part of the electric slide rail 401 is connected with the support rod 402, the electric slide rail 401 can drive the support rod 402 to move up and down, the support rod 402 is provided with the rotary motor 403, the output shaft of the rotary motor 403 is connected with the circular saw blade 404, the rotary motor 403 is responsible for driving the circular saw blade 404 to rotate to complete the cutting work of the H-shaped steel, the top of the support frame 1 is rotatably connected with the conveying shaft 5, the conveying shaft 5 is provided with connecting pieces 501 at both ends, the connecting pieces 501 are provided with first elastic members 513, the connecting pieces 501 are provided with gears 503, the left end of the support rod 402 is symmetrically provided with connecting rods 514, the bottom end of the connecting rod 514 is connected with the rack 504, the rack 504 can be meshed with the gear 503, during the downward movement of the support rod 402, the rack 504 will drive the gear 503 to rotate, and in turn drive the conveying shaft 5 to rotate, the top right side of the support frame 1 is slidably connected with the blocking plate 6, the top right side of the support frame 1 is rotatably connected with the screw rod 601, the screw rod 601 is threadedly connected with the blocking plate 6, the front right side of the support frame 1 is provided with the scale 604, the front end of the blocking plate 6 is provided with the scale pointer 614, the scale pointer 614 indicates the scale 604, rotating the screw rod 601 will make the blocking plate 6 move left and right along the support frame 1, and in turn make the scale pointer 614 indicate different scales on the scale 604.

[0030] As Figure 1 and Figure 11As shown, it further comprises a water tank 7, a water storage pipe 701, a piston rod 702, a first water pipe 703, a second water pipe 713, an expansion water bag 704, a spray head 705 and a one-way valve 706, the top end of the support column 4 is provided with the water tank 7, the two support columns 4 are both provided with a rectangular through hole 405, the ends of the two support columns 4 away from each other are both provided with the water storage pipe 701, the water storage pipe 701 is connected with the water tank 7 through the second water pipe 713, the second water pipe 713 is provided with the one-way valve 706, the water storage pipe 701 is slidably connected with the piston rod 702, the two piston rods 702 are both connected with the support rod 402 through the rectangular through hole 405, the bottom end of the water storage pipe 701 is connected with the first water pipe 703, the other end of the first water pipe 703 is connected with the expansion water bag 704, the other end of the expansion water bag 704 is connected with the spray head 705, the spray head 705 is connected with the protective shell on the circular saw blade 404, the flow of water sprayed from the spray head 705 is determined by the pressure at the expansion water bag 704, in the process of moving the support rod 402 downward, the support rod 402 drives the piston rod 702 to move downward along the water storage pipe 701, the piston rod 702 extrudes the water in the water storage pipe 701, because the flow of water pushed out of the water storage pipe 701 by the piston rod 702 is much larger than the flow of water sprayed from the spray head 705, part of the water is sprayed from the spray head 705 through the first water pipe 703 and the expansion water bag 704, the other part of the water accumulates in the expansion water bag 704, the volume of the expansion water bag 704 increases accordingly, and the pressure in the expansion water bag 704 gradually increases, at this time, the flow of water sprayed from the spray head 705 gradually increases (in this process, the spray head 705 moves downward along with the circular saw blade 404), when the circular saw blade 404 does not cut the H-shaped steel, the flow of water is small, in the process of cutting the H-shaped steel by the circular saw blade 404, the increased water flow continuously cools the circular saw blade 404 to prevent the circular saw blade 404 from overheating and being damaged, when the support rod 402 moves upward, the piston rod 702 moves upward, the water in the water tank 7 flows into the water storage pipe 701 through the one-way valve 706, so that the water storage pipe 701 is filled with water.

[0031] As shown in Figure 1 and Figure 10 It further comprises a pressing rod 8, a square pressing block 801 and a spring 802, the left and right ends of the support rod 402 are both slidably connected with the pressing rod 8, the bottom end of the pressing rod 8 is connected with the square pressing block 801, and the square pressing block 801 is connected with the support rod 402 through the spring 802, in the process of cutting the H-shaped steel by the circular saw blade 404, the pressing rod 8 always presses the upper end of the H-shaped steel to prevent the H-shaped steel from moving.

[0032] As shown in Figures 7-9As shown, it also includes U-shaped extrusion block 9, push rod 902, second elastic member 903 and cylindrical protrusion 904, the top of support frame 1 is symmetrically connected with U-shaped extrusion block 9 in front and back, the second elastic member 903 is connected between U-shaped extrusion block 9 and support frame 1, the cylindrical protrusion 904 is symmetrically arranged inside U-shaped extrusion block 9, the push rod 902 is symmetrically arranged on support rod 402 in front and back, the push rod 902 is in contact with the cylindrical protrusion 904, in the process of cutting H-shaped steel by circular saw blade 404, two U-shaped extrusion blocks 9 are responsible for clamping the front and back ends of H-shaped steel.

[0033] As shown in Figures 1-3 It also includes roller 3, drive motor 301 and belt pulley transmission 302, the top of support frame 1 is sequentially connected with roller 3 in left to right and interval, the left side of support frame 1 is connected with drive motor 301, the output shaft of drive motor 301 is connected with the leftmost roller 3, the adjacent roller 3 is connected with belt pulley transmission 302, drive motor 301 drives the leftmost roller 3 to rotate, the remaining roller 3 is driven to rotate through belt pulley transmission 302, the rotating roller 3 can be used for conveying H-shaped steel.

[0034] As shown in Figure 1 And Figure 2 It also includes wheel 101 and protective shell 102, the bottom of support frame 1 is rotatably connected with wheel 101 on four corners, the design of wheel 101 facilitates people to move the device when needed, stop switch is arranged on wheel 101, the front and back ends of support frame 1 are both installed with protective shell 102, protective shell 102 covers the outside of drive motor 301 and belt pulley transmission 302, which can protect drive motor 301 and belt pulley transmission 302, and also prevent people from touching belt pulley transmission 302 by mistake.

[0035] As shown in Figure 1 And Figure 4 It also includes guide rod 602, rotating disc 603 and sponge sleeve 605, the top of support frame 1 is provided with guide rod 602 at the rear side, guide rod 602 is slidably connected with blocking plate 6, in the process of moving blocking plate 6, guide rod 602 guides blocking plate 6, the right end of screw rod 601 is connected with rotating disc 603, the right end of rotating disc 603 is eccentrically provided with handle, rotating rotating disc 603 can make screw rod 601 rotate, and then make blocking plate 6 move, the outside of handle of rotating disc 603 is sleeved with sponge sleeve 605, which improves the comfort of handle.

[0036] As shown in Figure 1 And Figure 6As shown, the connecting piece 501 is composed of two connecting shafts, one of which is fixedly connected with the conveying shaft 5, and the other is rotatably connected with the support frame 1. The two connecting shafts abut against each other, and the ends of the two connecting shafts close to each other are both provided with semicircular protrusions at intervals in the circumferential direction. The first elastic member 513 is located in the connecting shaft connected with the support frame 1. The scale on the scale ruler 604 gradually increases from left to right, and the leftmost end of the scale ruler 604 is flush with the circular saw blade 404.

[0037] Before using the device, first, the position of the blocking plate 6 should be adjusted to determine the length of the H-beam cutting. Hold the handle on the rotating disc 603 and rotate the rotating disc 603 to move the blocking plate 6 driven by the screw rod 601. Observe the scale indicated by the scale pointer 614 on the scale 604. When the scale indicated by the scale pointer 614 is consistent with the required cutting length of the H-beam, stop rotating the rotating disc 603. Place the required cutting H-beam on the left side of the top end of the roller 3 of the support frame 1. Start the drive motor 301 to drive the leftmost roller 3 to rotate. The remaining roller 3 is rotated through the belt wheel transmission 302. The roller 3 transmits the H-beam to the right side. When the right end of the H-beam contacts the blocking plate 6, turn off the drive motor 301. Start the rotating motor 403 to rotate the circular saw blade 404. At the same time, the moving part of the electric slide rail 401 drives the support rod 402 to move down. In the process of moving down, the connecting rod 514 moves down to drive the gear rack 504 to mesh with the gear 503. The gear 503 drives the connecting piece 501 to rotate, thereby rotating the conveying shaft 5. The conveying shaft 5 transmits the H-beam to the right, making the H-beam resist and tightly contact the left end of the blocking plate 6. When the H-beam resists the left end of the blocking plate 6, the gear rack 504 continues to drive the gear 503 to rotate. However, at this time, the H-beam does not move to the right, so under the action of the H-beam, the conveying shaft 5 will be subjected to friction from the H-beam. When the friction is greater than the transmission force between the two connecting shafts of the connecting piece 501, the conveying shaft 5 will not rotate, and the connecting shaft connected with the conveying shaft 5 will also be prohibited from moving. The semicircular protrusions on the two connecting shafts rub against each other. The connecting shaft connected with the support frame 1 will compress to one side of the support frame 1. The first elastic member 513 changes from the initial state to the compressed state. After that, the connecting shaft connected with the support frame 1 will rotate by itself under the drive of the gear rack 504. Left and right clamping: In the process of moving down the support rod 402, the lower vertical rod part of the push rod 902 first contacts the cylindrical protrusion 904. In this process, the position of the U-shaped extrusion block 9 does not change. When the middle inclined rod part of the push rod 902 contacts the cylindrical protrusion 904, the U-shaped extrusion block 9 on both sides of the H-beam will move closer to the H-beam, fixing and clamping the H-beam. The H-beam resists and tightly contacts the left end of the blocking plate 6. The U-shaped extrusion block 9 clamps the H-beam before the upper vertical rod part of the push rod 902 contacts the cylindrical protrusion 904. The U-shaped extrusion block 9 fixes and clamps the H-beam unchanged. Up and down clamping: When the bottom end of the square block 801 resists the H-beam, the support rod 402 continues to move down. The upper part of the square block 801 passes through the upper side of the support rod 402. In this process, the spring 802 changes from the initial state to the compressed state. Under the action of the spring 802, the square block 801 presses the H-beam down. After that, the circular saw blade 404 contacts and cuts the H-beam. After the circular saw blade 404 rotates and cuts the H-beam, turn off the rotating motor 403.The electric sliding rail 401 drives the support rod 402 to move upward, the push rod 902 moves upward, re-presses the cylindrical protrusion 904, and makes the two U-shaped pressing blocks 9 away from each other and not clamp the H-shaped steel, at this time people can take away the cut H-shaped steel on the support frame 1, start the driving motor 301 again, and repeat the above operation to cut the remaining H-shaped steel again.

[0038] While the present disclosure has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-described embodiments, but should be defined by the appended claims and equivalents thereof.

Claims

1. A power tower H-beam cutting device comprising a support frame (1), characterized in that: It also includes support column (4), electric slide rail (401), support rod (402), rotary motor (403), circular saw blade (404), conveying shaft (5), connecting piece (501), gear (503), first elastic member (513), rack (504), connecting rod (514), blocking plate (6), screw rod (601), scale (604) and scale pointer (614), the top of the support frame (1) is symmetrically provided with support column (4), two support columns (4) are slidably connected with support rod (402) between them, the rear support column (4) is provided with electric slide rail (401), the moving part of electric slide rail (401) is connected with support rod (402), rotary motor (403) is arranged on support rod (402), the output shaft of rotary motor (403) is connected with circular saw blade (404), the top of support frame (1) is rotatably connected with conveying shaft (5), the front and rear ends of conveying shaft (5) are both provided with connecting piece (501), first elastic member (513) is arranged in connecting piece (501), gear (503) is arranged on connecting piece (501), connecting rod (514) is symmetrically arranged on the left end of support rod (402), rack (504) is connected to the bottom end of connecting rod (514), rack (504) can be meshed with gear (503), blocking plate (6) is slidably connected to the top right side of support frame (1), screw rod (601) is rotatably connected to one side of the top of support frame (1), screw rod (601) is threadedly connected with blocking plate (6), scale (604) is arranged on the right side of the front end of support frame (1), scale pointer (614) is arranged on the front end of blocking plate (6), scale pointer (614) indicates scale (604); It also includes water tank (7), water storage pipe (701), piston rod (702), first water pipe (703), second water pipe (713), inflatable water bag (704), spray head (705) and one-way valve (706), the top of support column (4) is provided with water tank (7), two support columns (4) are both provided with rectangular through hole (405), the ends of two support columns (4) away from each other are both provided with water storage pipe (701), second water pipe (713) is connected between water storage pipe (701) and water tank (7), one-way valve (706) is arranged on second water pipe (713), piston rod (702) is slidably connected in water storage pipe (701), two piston rods (702) are both connected with support rod (402) through rectangular through hole (405), the bottom end of water storage pipe (701) is connected with first water pipe (703), the other end of first water pipe (703) is connected with inflatable water bag (704), the other end of inflatable water bag (704) is connected with spray head (705), spray head (705) is connected with the protective shell on circular saw blade (404); The supporting rod (402) is slidably connected with the pressure rod (8) at left and right ends, the bottom end of the pressure rod (8) is connected with the square pressing block (801), and the square pressing block (801) is connected with the supporting rod (402) through the spring (802); The supporting frame (1) is slidably connected with the U-shaped extrusion block (9) at the top end in a front-rear symmetry mode, the second elastic member (903) is arranged between the U-shaped extrusion block (9) and the supporting frame (1), the cylindrical protrusions (904) are arranged in the U-shaped extrusion block (9) in a left-right symmetry mode, and the push rod (902) is arranged on the supporting rod (402) in a front-rear symmetry mode.

2. The power tower H-shaped steel cutting device according to claim 1, characterized in that: The supporting frame (1) is rotatably connected with the roller (3) at the top end in a left-to-right sequence and interval mode, the left side of the supporting frame (1) is connected with the driving motor (301), the output shaft of the driving motor (301) is connected with the leftmost roller (3), and the adjacent rollers (3) are connected with the belt pulley transmission member (302).

3. The power tower H-shaped steel cutting device according to claim 2, characterized in that: The supporting frame (1) is rotatably connected with the wheel (101) at four corners of the bottom end, and the wheel (101) is provided with a stop switch.

4. The power tower H-shaped steel cutting device according to claim 3, characterized in that: The supporting frame (1) is rotatably connected with the wheel (101) at four corners of the bottom end, and the wheel (101) is provided with a stop switch.

5. The power tower H-beam cutting device of claim 4, wherein: The supporting frame (1) is rotatably connected with the wheel (101) at four corners of the bottom end, and the wheel (101) is provided with a stop switch.

6. The power tower H-beam cutting device of claim 5, wherein: The supporting frame (1) is rotatably connected with the wheel (101) at four corners of the bottom end, and the wheel (101) is provided with a stop switch.

7. The power tower H-beam cutting device of claim 6, wherein: The supporting frame (1) is rotatably connected with the wheel (101) at four corners of the bottom end, and the wheel (101) is provided with a stop switch. The connecting piece (501) is composed of two connecting shafts, one connecting shaft is fixedly connected with the conveying shaft (5), and the other connecting shaft is rotatably connected with the supporting frame (1); the two connecting shafts abut against each other, and the end, which is close to each other, of the two connecting shafts is provided with a semicircular protrusion in a circumferential interval mode; the first elastic member (513) is arranged in the connecting shaft connected with the supporting frame (1); the scale on the scale ruler (604) gradually increases from left to right; and the leftmost end of the scale ruler (604) is flush with the circular saw blade (404).

Images