CN218195707U

CN218195707U - Toothless saw

Info

Publication number: CN218195707U
Application number: CN202221084887.3U
Authority: CN
Inventors: 卢月菊
Original assignee: Shenyang Shulan Wood Industry Co ltd
Current assignee: Shenyang Shulan Wood Industry Co ltd
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2023-01-03
Anticipated expiration: 2032-05-09

Abstract

The utility model discloses a toothless saw, which comprises a platform, the spout has been seted up at the top of platform, and slidable mounting has the slide in the spout, and the top of slide extends to outside the spout and fixed mounting has the cutting bed, and cutting groove has been seted up at the top of cutting bed, and cutting groove's both sides are the opening structure, are provided with actuating mechanism on the platform, and the top of cutting bed is provided with fixture, and the top fixed mounting of platform has the riser that is located the cutting bed rear side. The utility model relates to a rationally, the practicality is good, can carry out the autoloading cutting to timber, does not need staff's manual promotion timber to go forward and carries out the sawing operation, labour saving and time saving promptly has eliminated the potential safety hazard again, can collect the dust piece that timber sawing in-process produced moreover, can improve the air quality around the operational environment, also can improve the dirty and disorderly degree around the operational environment, keeps clean and tidy around the operational environment, reduces the injury that causes the human body.

Description

Toothless saw

Technical Field

The utility model relates to a cutting equipment technical field specifically is a toothless saw.

Background

The toothless saw is an electric tool without teeth and capable of realizing the function of sawing, the main body of the toothless saw is a grinding wheel of a motor, the grinding wheel can be connected through a belt or directly fixed on a motor shaft, the cutting process is realized by high-speed rotation of the grinding wheel, objects are cut by utilizing the sharp corners of grinding wheel particles, meanwhile, the abraded particles fall down, new sharp particles are exposed, and the abrasion cutting of the grinding wheel is utilized.

However, when a common toothless saw is used, the function is single, and the toothless saw does not have the function of automatic feeding and sawing, when longer timbers are sawed, the sawing operation can be completed only by pushing the timbers to move towards the direction close to the toothless saw blade rotating at a high speed, the operation is complex, time and labor are wasted, when the timbers are cut off soon, the finger parts of the staffs can be close to the toothless saw blade rotating at a high speed, the finger parts are easily injured by mistake, potential safety hazards exist, the toothless saw does not have the function of collecting dust scraps generated in the process of sawing the timbers, the generated dust scraps splash around the process of sawing the timbers, air pollution around the working environment can be caused, dirty and messy surroundings of the working environment can be caused, and air containing dust can be inhaled by the staffs to injure the bodies of the operators, and therefore, the toothless saw is provided for solving the problems.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a toothless saw has solved toothless saw function when using more single, does not have the function of autoloading sawing, does not have the problem of the function of collecting to the dust piece that the sawing timber in-process produced moreover.

(II) technical scheme

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a toothless saw, which comprises a platform, the spout has been seted up at the top of platform, slidable mounting has the slide in the spout, the top of slide extends to outside the spout and fixed mounting has the cutting bed, the top of cutting bed has been seted up cuts cut groove, the both sides of cutting cut groove are the opening structure, be provided with actuating mechanism on the platform, the top of cutting bed is provided with fixture, the top fixed mounting of platform has the riser that is located the cutting bed rear side, the top fixed mounting of riser has the roof, fixed mounting has the cutting motor on the preceding lateral wall of riser, the fixed cover of output shaft of cutting motor is equipped with toothless saw bit, be provided with dust absorption mechanism on the roof.

Preferably, the driving mechanism comprises a screw rod and a driving motor, the screw rod is rotatably installed in the chute, the sliding seat is sleeved on the screw rod in a threaded manner, the driving motor is fixedly installed on the left side wall of the platform, and the left end of the screw rod extends out of the platform and is fixedly connected with the output shaft end of the driving motor.

Preferably, a guide rod below the screw rod is fixedly mounted in the sliding groove, the sliding seat is sleeved on the guide rod in a sliding mode, the bottom of the sliding seat is nested with balls, and the balls are in rolling contact with the inner wall of the bottom of the sliding groove.

Preferably, the clamping mechanism comprises four electric push rods and four clamping plates, the four electric push rods are fixedly mounted at the top of the cutting table, the four electric push rods are symmetrically arranged in pairs, and the four clamping plates are fixedly mounted at the output shaft ends of the corresponding electric push rods respectively.

Preferably, the dust collection mechanism comprises two dust cylinders, two supports, two shaft seats, two rotating shafts, two dust collection fan blades, a collection box, a box cover, two dust exhaust pipes, a dust blocking filter screen, a partition plate and a transmission assembly, wherein the two dust cylinders and the collection box are fixedly mounted at the top of the top plate, the collection box is located between the two dust cylinders, the top plate penetrates through the bottom ends of the two dust cylinders, the bottom ends of the two dust cylinders are of an open structure, the two supports are fixedly mounted on the inner side walls of the corresponding dust cylinders respectively, the two shaft seats are fixedly mounted on the corresponding supports respectively, the two rotating shafts are rotatably mounted on the corresponding shaft seats respectively, the two dust collection fan blades are fixedly mounted at the bottom ends of the corresponding rotating shafts respectively, the top of the collection box is of an open structure, the box cover is fixedly mounted at the top of the collection box through screws, the two dust exhaust pipes are fixedly mounted on the side walls of the corresponding dust cylinders respectively, the two dust exhaust pipes are communicated with the corresponding dust cylinders respectively, the two dust exhaust pipes are located above the top plate, one ends of the two exhaust pipes, which are close to each other, the collection box extends into the collection box, air holes are formed in the top of the collection box cover, the dust exhaust holes, the partition plate is fixedly mounted at the bottom of the box cover, the partition plate, and located between the partition plate.

Preferably, the transmission assembly comprises a first bevel gear, a vertical shaft, a second bevel gear, a third bevel gear, two positioning plates, two transverse shafts, two fourth bevel gears, two fifth bevel gears and two sixth bevel gears, the first bevel gear is fixedly sleeved at the output shaft end of the cutting motor and is positioned at the front side of the toothless saw blade, a positioning seat is fixedly installed at the bottom of the top plate, the top end of the vertical shaft is rotatably installed on the positioning seat and is positioned at the front side of the toothless saw blade, the second bevel gear is fixedly installed at the bottom end of the vertical shaft and is engaged with the first bevel gear, the third bevel gear is fixedly sleeved on the vertical shaft, the two positioning plates are both fixedly installed at the bottom of the top plate and are symmetrically arranged at the two sides of the vertical shaft, the two transverse shafts are respectively rotatably installed on the corresponding positioning plates, the ends, far away from each other, of the two transverse shafts respectively penetrate through the corresponding positioning plates, the two fourth bevel gears are respectively fixedly installed at the ends, close to each other, the two fourth bevel gears are both engaged with the third bevel gears, the inner wall of one side, the two dust cylinders are both close to each other, circular holes are respectively penetrated through the corresponding circular holes, the ends, the two fifth bevel gears are respectively fixedly installed at the ends, far away from each other transverse shafts, and are respectively engaged with the top ends of the corresponding to the six bevel gears.

Preferably, the inner walls of the two round holes are fixedly provided with sealing rings, and the two cross shafts are respectively matched with the corresponding round holes in a rotating and sealing manner through the corresponding sealing rings.

(III) advantageous effects

The utility model provides a toothless saw. The method has the following beneficial effects:

(1) This a toothless saw, put between four splint on the cutting bed through the timber that will wait to saw, start four electric putter work, steerable four splint move to the direction that is close to each other, and then utilize four splint can fix the firm centre gripping of timber on the cutting bed, through opening the cutting motor, steerable toothless saw bit and the high-speed rotation of first bevel gear, through starting driving motor corotation, steerable lead screw corotation is rotated, make the slide drive the timber level of cutting bed and firm centre gripping right one end, the in-process that the level moved right gradually at timber, utilize the high-speed rotation of toothless saw bit, can saw the processing to timber, and then can carry out autoloading cutting to timber, do not need staff's manual promotion timber to go forward to carry out the sawing operation, labour saving and time saving, the potential safety hazard has been eliminated again.

(2) The toothless saw comprises a first bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear, a third bevel gear, a fifth bevel gear, a second bevel gear, a third bevel gear, a fourth bevel gear, a fifth bevel gear, a sixth bevel gear, a baffle plate and a dust exhaust pipe, wherein the first bevel gear is meshed with the second bevel gear, the second bevel gear is meshed with the third bevel gear, the fifth bevel gear is meshed with the corresponding sixth bevel gear respectively, the two dust exhaust fan blades can be controlled to rotate synchronously at the same direction and at high speed, the two dust exhaust fan blades rotate, the two dust exhaust fan blades generate suction force when rotating, dust fragments generated in the wood sawing process can be sucked into the two dust exhaust pipes, the dust fragments are discharged into the collecting box and stored, the baffle plate is utilized, air with the dust fragments discharged from the two dust exhaust pipes can be prevented from generating convection to influence on dust exhaust effect, the dust fragments generated in the wood sawing process can be collected, the air quality around the working environment can be improved, the messy degree around the working environment can be improved, the periphery of the working environment can be kept clean and tidy, and harm to a human body can be reduced.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic sectional view of the front view of the present invention;

fig. 3 is an enlarged schematic view of a portion a in fig. 2.

In the figure: 1. a platform; 2. a chute; 3. a slide base; 4. cutting table; 5. cutting the groove; 6. a screw rod; 7. a drive motor; 8. an electric push rod; 9. a splint; 10. a vertical plate; 11. a top plate; 12. cutting the motor; 13. a toothless saw blade; 14. a dust suction cylinder; 15. a support; 16. a shaft seat; 17. a rotating shaft; 18. dust-collecting fan blades; 19. a first bevel gear; 20. a vertical axis; 21. a second bevel gear; 22. a third bevel gear; 23. positioning a plate; 24. a horizontal axis; 25. a fourth bevel gear; 26. a fifth bevel gear; 27. a sixth bevel gear; 28. a collection box; 29. a box cover; 30. a dust exhaust pipe; 31. a dust-blocking filter screen; 32. a separator.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention, and in the description of the present invention, "plurality" means two or more unless specifically defined otherwise.

As shown in fig. 1-3, the utility model provides a technical solution: the utility model provides a toothless saw, which comprises a platform 1, spout 2 has been seted up at the top of platform 1, sliding installation has slide 3 in spout 2, the top of slide 3 extends to spout 2 outer and fixed mounting has cutting bed 4, cutting bed 4's top has been seted up cuts cut groove 5, the both sides of cutting cut groove 5 are the opening structure, be provided with actuating mechanism on the platform 1, through setting up actuating mechanism, steerable slide 3 drives cutting bed 4 and carries out horizontal migration, cutting bed 4's top is provided with fixture, through setting up fixture, can fix the timber centre gripping of waiting to cut on cutting bed 4, platform 1's top fixed mounting has the riser 10 that is located cutting bed 4 rear side, the top fixed mounting of riser 10 has roof 11, fixed mounting has cutting motor 12 on the preceding lateral wall of riser 10, the output shaft end fixed cover of cutting motor 12 is equipped with toothless saw bit 13, be provided with dust absorption mechanism on roof 11, through setting up dust absorption mechanism, can collect the piece that saw cuts the in-process produced, and then can improve the air quality around the operational environment, also can improve the dirty degree around the operational environment.

In this embodiment, actuating mechanism includes lead screw 6 and driving motor 7, and lead screw 6 rotates to be installed in

spout

2, and 3 threaded sleeves of slide are established on lead screw 6, and driving motor 7 fixed mounting is on the left side wall of platform 1, and the left end of lead screw 6 extends to the platform 1 outside and with driving motor 7's output shaft fixed connection, utilizes driving motor 7, steerable lead screw 6 rotates, and then steerable slide 3 drives 4 horizontal migration of cutting bed.

In this embodiment, fixedly mounted has the guide arm of lead screw 6 below in spout 2, and slide 3 sliding sleeve establishes on the guide arm, and the bottom nestification of slide 3 has the ball, and the ball contacts with the bottom inner wall rolling of spout 2, through setting up the guide arm, plays the effect of leading to the slip direction of slide 3, through setting up the ball for slide 3 slides more smoothly in spout 2.

In this embodiment, fixture includes four electric putter 8 and four splint 9, and four equal fixed mounting of electric putter 8 are at the top of cutting bed 4, and four electric putter 8 are two bisymmetry settings, and four splint 9 are fixed mounting respectively at corresponding electric putter 8's output shaft end, through utilizing four electric putter 8, can adjust the horizontal position of corresponding splint 9 respectively.

In this embodiment, the dust collection mechanism includes two dust cylinders 14, two supports 15, two shaft seats 16, two rotating shafts 17, two dust collection blades 18, a collection box 28, a box cover 29, two dust discharge pipes 30, a dust blocking filter screen 31, a partition plate 32 and a transmission assembly, wherein the two dust cylinders 14 and the collection box 28 are both fixedly mounted on the top of the top plate 11, the collection box 28 is located between the two dust cylinders 14, the bottom ends of the two dust cylinders 14 both penetrate through the top plate 11, the bottom ends of the two dust cylinders 14 are both of an open structure, the two supports 15 are respectively fixedly mounted on the inner side walls of the corresponding dust cylinders 14, the two shaft seats 16 are respectively fixedly mounted on the corresponding supports 15, the two rotating shafts 17 are respectively rotatably mounted on the corresponding shaft seats 16, the two dust collection blades 18 are respectively fixedly mounted on the bottom ends of the corresponding rotating shafts 17, the top of the collection box 28 is of an open structure, the box cover 29 is fixedly arranged at the top of the collection box 28 through screws, the two dust exhaust pipes 30 are respectively and fixedly arranged on the side walls of the corresponding dust suction cylinders 14, the two dust exhaust pipes 30 are respectively communicated with the interiors of the corresponding dust suction cylinders 14, the two dust exhaust pipes 30 are both positioned above the top plate 11, the mutually close ends of the two dust exhaust pipes 30 extend into the collection box 28, the top of the box cover 29 is provided with air holes, a dust blocking filter screen 31 is fixedly arranged in the air holes, a partition plate 32 is fixedly arranged at the bottom of the box cover 29 and positioned in the collection box 28, the partition plate 32 is positioned between the two dust exhaust pipes 30, dust fragments generated in the wood sawing process can be sucked into the two dust suction cylinders 14 by utilizing suction force generated when the two dust suction fan blades 18 rotate, then the dust fragments are discharged into the collection box 28 through the two dust exhaust pipes 30, the dust fragments can be collected by utilizing the collection box 28, the dust blocking filter screen 31, can make the air that gets into in the collecting box 28 clean the back can be followed and kept off dirt filter screen 31 and discharged, through setting up baffle 32, can carry out the separation to the one end that two dust exhaust pipes 30 are close to each other, avoid having the air convection current of dust piece and influence the dust absorption effect.

In this embodiment, the transmission assembly includes a first bevel gear 19, a vertical shaft 20, a second bevel gear 21, a third bevel gear 22, two positioning plates 23, two lateral shafts 24, two fourth bevel gears 25, two fifth bevel gears 26, and two sixth bevel gears 27, the first bevel gear 19 is fixedly sleeved at an output shaft end of the cutting motor 12 and is located at a front side of the toothless saw blade 13, the bottom of the top plate 11 is fixedly mounted with a positioning seat, a top end of the vertical shaft 20 is rotatably mounted on the positioning seat and is located at the front side of the toothless saw blade 13, the second bevel gear 21 is fixedly mounted at a bottom end of the vertical shaft 20, the second bevel gear 21 is engaged with the first bevel gear 19, the third bevel gear 22 is fixedly sleeved on the vertical shaft 20, the two positioning plates 23 are both fixedly mounted at a bottom of the top plate 11, the two positioning plates 23 are symmetrically arranged at two sides of the vertical shaft 20, the two lateral shafts 24 are respectively rotatably mounted on the corresponding positioning plates 23, the ends, far away from each other, of the two transverse shafts 24 respectively penetrate through the corresponding positioning plates 23, the two fourth bevel gears 25 are respectively and fixedly installed at the ends, close to each other, of the two transverse shafts 24, the two fourth bevel gears 25 are both meshed with the third bevel gears 22, the inner walls, close to each other, of the two dust suction drums 14 are both provided with round holes, the ends, far away from each other, of the two transverse shafts 24 are respectively and fixedly installed at the ends, far away from each other, of the two transverse shafts 24, the two fifth bevel gears 26 are respectively and fixedly installed at the top ends of the corresponding rotating shafts 17, the two fifth bevel gears 26 are respectively meshed with the corresponding sixth bevel gears 27, the vertical shaft 20 can be controlled to rotate through meshing transmission of the second bevel gears 21 and the first bevel gears 19, the two transverse shafts 24 can be controlled to rotate simultaneously through meshing transmission of the two fourth bevel gears 25 and the third bevel gears 22, the two fifth bevel gears 26 are respectively engaged with the corresponding sixth bevel gears 27 for transmission, so that the two rotating shafts 17 can be controlled to drive the corresponding dust-collecting fan blades 18 to rotate, and the two dust-collecting fan blades 18 can synchronously rotate at the same direction and at high speed by the aid of the gear transmission.

In this embodiment, all fixed mounting has the sealing ring on the inner wall of two round holes, and two cross axles 24 rotate sealed cooperation with corresponding round hole respectively through corresponding sealing ring, through setting up the sealing ring, can seal the clearance between cross axle 24 and the round hole, avoid the air to discharge from the clearance between round hole and the cross axle 24.

In this embodiment, the cutting groove 5 and the toothless saw blade 13 are located on the same horizontal axis, the inner wall of the bottom of the cutting groove 5 is lower than the bottommost position of the toothless saw blade 13, and the toothless saw blade 13 does not contact with the inner wall of the bottom of the cutting groove 5 in the cutting process.

In this embodiment, install control switch on platform 1, driving motor 7, four electric putter 8, cutting motor 12 and control switch loop through wire and external power cord electric connection and constitute the return circuit, but driving motor 7 adopts the low-speed motor that just reverses, and cutting motor 12 adopts high-speed motor, and the start-stop and the just reverse work of the steerable driving motor 7 of control switch can control the start-stop and the reset work of four electric putter 8 respectively, still can control opening and closing of cutting motor 12.

When the wood cutting machine is used, the power supply is switched on, the wood to be sawed is placed between the four clamping plates 9 on the cutting table 4, the position of the wood to be sawed is flush with the toothless saw blade 13, the four electric push rods 8 are started to work, the four electric push rods 8 push the corresponding clamping plates 9 to move, the four clamping plates 9 move towards the direction close to each other, when the four clamping plates 9 respectively move to be in close contact with the front side and the rear side of the wood, the four electric push rods 8 stop working, the wood can be stably clamped and fixed on the cutting table 4 by utilizing the four clamping plates 9, the cutting motor 12 is started to work, the cutting motor 12 drives the toothless saw blade 13 and the first bevel gear 19 to rotate at high speed, then the driving motor 7 is started to rotate forwards, the driving motor 7 drives the screw rod 6 to rotate forwards, so that the sliding base 3 drives the cutting table 4 and the stably clamped wood to horizontally move towards the right end gradually in the wood gradually horizontal moving process, the wood can be sawed by utilizing the high-speed rotation of the toothless saw blade 13, so that the wood can be automatically fed and cut, the wood does not need to be manually pushed by a worker to move forwards for sawing operation, time and labor are saved, and potential safety hazards are eliminated, in the process of sawing the wood, the vertical shaft 20 and the third bevel gear 22 can be controlled to rotate by utilizing the meshing transmission of the second bevel gear 21 and the first bevel gear 19, the two fourth bevel gears 25 and the third bevel gear 22 can be controlled to simultaneously rotate by utilizing the meshing transmission of the two fourth bevel gears 25 and the third bevel gear 22, the two transverse shafts 24 can be controlled to simultaneously rotate, the two transverse shafts 24 can drive the corresponding fifth bevel gears 26 to rotate, the two fifth bevel gears 26 are respectively meshed with the corresponding sixth bevel gears 27 to drive the two rotating shafts 17 to drive the corresponding dust collection fan blades 18 to rotate, and the two dust collection fan blades 18 can synchronously rotate at the same direction and at high speed, by utilizing the suction force generated when the two dust suction fan blades 18 rotate, dust chips generated in the timber sawing process can be sucked into the two dust suction cylinders 14, then the dust chips are discharged into the collection box 28 through the two dust discharge pipes 30 and stored, filtered clean air is discharged from the dust blocking filter screen 31, the partition plate 32 can be utilized to block one end, close to each other, of the two dust discharge pipes 30, the phenomenon that the dust suction effect is influenced due to convection of the air with the dust chips discharged from the two dust discharge pipes 30 is avoided, the dust chips generated in the timber sawing process can be collected, the air quality around the working environment can be improved, the messy degree around the working environment can be improved, the cleanness around the working environment is kept, harm to a human body is reduced, after the timber sawing is completed, the cutting motor 12 stops working, the four electric push rods 8 can be started to reset, the four clamp plates 9 can be controlled to move in the directions far away from each other, the sawed timber can be controlled to move, then the sawed timber, the driving motor 7 is started to rotate reversely, the driving motor 7 can drive the cutting box cover 4 to move horizontally, the box cover 4 can be controlled to drive the cutting table, and the dust collecting box cover 28 to be removed to the left, and the dust collecting box can be removed by the conventional dust removal technology of a person who does not describe the dust removal technology.

In conclusion, the toothless saw can automatically feed and cut timber without manually pushing the timber to move forward by workers for sawing operation, so that time and labor are saved, potential safety hazards are eliminated, dust and debris generated in the timber sawing process can be collected, the air quality around the working environment can be improved, the messy degree around the working environment can be improved, the cleanness around the working environment is kept, and the harm to a human body is reduced.

Claims

1. A toothless saw comprising a platform (1), characterized in that: spout (2) have been seted up at the top of platform (1), sliding mounting has slide (3) in spout (2), the top of slide (3) extends to spout (2) outer and fixed mounting have cutting bed (4), the top of cutting bed (4) has been seted up and has been cut groove (5), the both sides of cutting cut groove (5) are the opening structure, be provided with actuating mechanism on platform (1), the top of cutting bed (4) is provided with fixture, the top fixed mounting of platform (1) has riser (10) that are located cutting bed (4) rear side, the top fixed mounting of riser (10) has roof (11), fixed mounting has cutting motor (12) on the preceding lateral wall of riser (10), the output shaft end fixed cover of cutting motor (12) is equipped with toothless saw bit (13), be provided with dust absorption mechanism on roof (11).

2. A toothless saw as claimed in claim 1, characterized in that: actuating mechanism includes lead screw (6) and driving motor (7), lead screw (6) rotate to be installed in spout (2), slide (3) threaded sleeve is established on lead screw (6), driving motor (7) fixed mounting be in on the left side wall of platform (1), the left end of lead screw (6) extends to outside platform (1) and with the output shaft end fixed connection of driving motor (7).

3. A toothless saw as claimed in claim 2, characterized in that: the guide arm of lead screw (6) below is fixedly mounted in spout (2), slide (3) slip cap is established on the guide arm, the bottom nestification of slide (3) has the ball, the ball with the bottom inner wall rolling contact of spout (2).

4. A toothless saw as claimed in claim 1, characterized in that: the clamping mechanism comprises four electric push rods (8) and four clamping plates (9), wherein the electric push rods (8) are fixedly mounted at the top of the cutting table (4), the electric push rods (8) are symmetrically arranged in pairs, and the clamping plates (9) are fixedly mounted at the corresponding output shaft ends of the electric push rods (8).

5. A toothless saw according to claim 1, wherein: the dust collection mechanism comprises two dust collection cylinders (14), two supports (15), two shaft seats (16), two rotating shafts (17), two dust collection fan blades (18), a collection box (28), a box cover (29), two dust discharge pipes (30), a dust blocking filter screen (31), a partition plate (32) and a transmission assembly, wherein the two dust collection cylinders (14) and the collection box (28) are fixedly mounted at the top of the top plate (11), the collection box (28) is positioned between the two dust collection cylinders (14), the bottom ends of the two dust collection cylinders (14) penetrate through the top plate (11), the bottom ends of the two dust collection cylinders (14) are both of an open structure, the two supports (15) are respectively and fixedly mounted on the inner side wall of the corresponding dust collection cylinders (14), the two shaft seats (16) are respectively and fixedly mounted on the corresponding supports (15), the two rotating shafts (17) are respectively and rotatably mounted on the corresponding shaft seats (16), the two dust collection cylinders (18) are respectively and fixedly mounted at the bottom ends of the corresponding rotating shafts (17), the two dust collection cylinders (28) are respectively and fixedly mounted on the top side walls of the collection box (30) through the two dust collection boxes (28), two dust exhaust pipe (30) respectively with corresponding inside being linked together of suction drum (14), two dust exhaust pipe (30) all are located the top of roof (11), two the one end that dust exhaust pipe (30) are close to each other all extends to in collecting box (28), the bleeder vent has been seted up at the top of case lid (29), keep off dirt filter screen (31) fixed mounting in the bleeder vent, baffle (32) fixed mounting be in the bottom of case lid (29) is located in collecting box (28), baffle (32) are located two between dust exhaust pipe (30).

6. A toothless saw according to claim 5, wherein: the transmission assembly comprises a first bevel gear (19), a vertical shaft (20), a second bevel gear (21), a third bevel gear (22), two positioning plates (23), two transverse shafts (24), two fourth bevel gears (25), two fifth bevel gears (26) and two sixth bevel gears (27), the first bevel gear (19) is fixedly sleeved at the output shaft end of the cutting motor (12) and is positioned at the front side of the toothless saw blade (13), a positioning seat is fixedly installed at the bottom of the top plate (11), the top end of the vertical shaft (20) is rotatably installed on the positioning seat and is positioned at the front side of the toothless saw blade (13), the second bevel gear (21) is fixedly installed at the bottom end of the vertical shaft (20), the second bevel gear (21) is engaged with the first bevel gear (19), the third bevel gear (22) is fixedly sleeved on the vertical shaft (20), the two positioning plates (23) are fixedly installed at the bottom of the top plate (11), the two positioning plates (23) are symmetrically arranged at two sides of the vertical shaft (20), the two positioning plates (24) are rotatably installed at two ends of the two transverse shafts (24) which are respectively corresponding to each other and are far away from the two positioning plates (24), and penetrate through the two positioning plates (24), the two fourth bevel gears (25) are meshed with the third bevel gear (22), round holes are formed in the inner wall of one side, close to each other, of each of the two dust suction barrels (14), one ends, far away from each other, of the two transverse shafts (24) penetrate through the corresponding round holes respectively, the two fifth bevel gears (26) are fixedly mounted at one ends, far away from each other, of the two transverse shafts (24) respectively, the two sixth bevel gears (27) are fixedly mounted at the top ends of the corresponding rotating shafts (17) respectively, and the two fifth bevel gears (26) are meshed with the corresponding sixth bevel gears (27) respectively.

7. The toothless saw as set forth in claim 6, wherein: sealing rings are fixedly mounted on the inner walls of the two round holes, and the two cross shafts (24) are in rotary sealing fit with the corresponding round holes through the corresponding sealing rings.