CN115781836A

CN115781836A - Dust-free bench saw

Info

Publication number: CN115781836A
Application number: CN202211576569.3A
Authority: CN
Inventors: 胡挺勇; 胡杰耀
Original assignee: Zhejiang Xianchuan Industry And Trade Co ltd
Current assignee: Zhejiang Xianchuan Industry And Trade Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-03-14
Anticipated expiration: 2042-12-09
Also published as: CN115781836B

Abstract

The invention relates to a woodworking tool and discloses a dust-free table saw which comprises a workbench, wherein a vertical partition plate is arranged below the workbench, a saw blade is arranged on one side of the partition plate, a motor fixed on the lower plane of the workbench is arranged on the other side of the partition plate, and an output shaft of the motor is rotatably arranged on the plate surface of the partition plate in a penetrating manner and is fixed at the rotating center of the saw blade. At the moment, the chip dust generated by the saw blade cutting the wood can be sucked into the dust cover through the opening, and then is sucked into the dust cover where the centrifugal fan is located through the dust suction pipe and the air guide pipe in sequence. Under centrifugal fan's drive, the piece dust can be discharged through the exhaust pipe to play dustproof effect, and then improve the operational environment of bench saw, reduce the injury to the human body simultaneously.

Description

Dust-free bench saw

Technical Field

The invention relates to woodworking tools, in particular to a dust-free table saw.

Background

Table saws, also known as sliding table saws, have evolved to allow for faster and more accurate sawing of wood. The sliding table saw mainly comprises a sliding table, a working table surface, a crosspiece ruler, a slide carriage seat, a main saw, a slot saw and the like. A similar sliding table saw is disclosed in utility model patent publication No. CN 207189852U.

The existing sliding table saw is easy to generate more chippings and dust in the using process, and along with the increase of the requirements of people on indoor decoration environment, even the dust generated in the decoration process has higher and higher requirements, namely the dust is reduced as much as possible in the decoration process. This is both environmental protection and protection for construction workers, and therefore a need exists for a table saw with a dust suction function.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the dust-free table saw, which can effectively reduce the scrap dust generated in the working process of the table saw and greatly improve the working environment.

In order to solve the technical problem, the invention is solved by the following technical scheme:

a dust-free table saw comprises a workbench, wherein a vertical partition plate is arranged below the workbench, a saw blade is arranged on one side of the partition plate, a motor fixed on the lower plane of the workbench is arranged on the other side of the partition plate, an output shaft of the motor is rotatably arranged on the plate surface of the partition plate in a penetrating manner and is fixed on the rotating center of the saw blade, and an opening for inserting the saw blade is formed in the workbench so that the upper edge of the saw blade is positioned on the upper plane of the workbench; one side that the baffle is close to the saw bit is provided with the dust cover that is used for cladding saw bit, the face of baffle runs through there is the dust absorption mouth, one side that the dust absorption mouth is close to the motor is provided with the dust absorption pipe, the one end that the saw bit was kept away from to the motor is provided with the suction hood, the one end that the output shaft of motor kept away from the saw bit is provided with centrifugal fan, centrifugal fan's axial air inlet face is just to the terminal surface of suction hood, centrifugal fan's radial air-out face is just to the side of suction hood, it has the guide duct to communicate between the port that the dust absorption mouth was kept away from to the dust absorption pipe and the terminal surface of suction hood, the air exit that communicates in the suction hood inner chamber is seted up to the side of suction hood and in its below position, the air exit links up the exhaust pipe downwards.

By adopting the scheme, the motor output shaft drives the saw blade to cut wood, the centrifugal fan can be driven to operate simultaneously, so that the dust hood is in a negative pressure state, and the dust hood is also in a negative pressure state under the communication effect of the air guide pipe and the dust suction pipe. At the moment, the chip dust generated by the saw blade cutting the wood can be sucked into the dust cover through the opening, and then is sucked into the dust cover where the centrifugal fan is located through the dust suction pipe and the air guide pipe in sequence. Under centrifugal fan's drive, the piece dust can be discharged through the exhaust pipe to play dustproof effect, and then improve the operational environment of bench saw, reduce the injury to the human body simultaneously.

Preferably, a support frame is arranged below the workbench, and a dust collecting device connected to the exhaust pipe is installed below the support frame.

By adopting the scheme, the broken dust discharged by the exhaust pipe can be effectively collected by the dust collecting device, so that the secondary pollution is avoided, and the device is more humanized.

As preferred, dust collecting device includes the dust bag and is fixed in the support of support frame below, the support includes that two boards are personally submitted the parallel vertical support board that sets up relatively, the upper end of two backup pads all is fixed in the below of support frame, be provided with the base between the lower extreme of two backup pads, the dust bag is located between two backup pads, the dust bag on, the downside is provided with extension board and lower extension board respectively, it all is provided with branch to go up between four corners of extension board and lower extension board, the face of going up the extension board runs through there is the dust collection mouth, the below of dust collection mouth is extended there is the joint pipe, the last plane of dust bag is provided with the interference and is pegged graft in the intraductal dust tube of joint, be provided with on-off mechanism between exhaust pipe and the dust collection mouth, on-off mechanism has two states:

in the first state, when the dust bag horizontally moves between the two supporting plates along with the upper supporting plate and the lower supporting plate and the dust collecting port is aligned with the exhaust pipe, the on-off mechanism is communicated with the exhaust pipe and the dust collecting port;

and in the second state, when the dust collecting opening is ready to transversely leave the exhaust pipe, the on-off mechanism can actively cut off the exhaust pipe and the dust collecting opening.

Adopt above-mentioned scheme, peg graft in the intraductal dust collecting tube of joint with the help of the interference, can realize the quick assembly disassembly between dust bag and the last bolster to make things convenient for the dust bag in the dust collecting device to change, promoted availability factor and convenience. The lower support plate can support the dust collecting bag, so that the dust collecting pipe is prevented from being separated from the clamping pipe by itself due to the fact that the dust collecting bag is too heavy. The exhaust pipe and the dust collecting opening are actively switched on and off by the on-off mechanism, so that the dust collecting device can be more conveniently detached and replaced.

Preferably, the on-off mechanism comprises an extension pipe arranged at the lower end of the exhaust pipe and a lifting movable pipe positioned between the extension pipe and the dust collecting opening, a telescopic pipe is connected between the lifting movable pipe and the dust collecting opening, mounting seats are arranged on the extension pipe and correspond to two sides of the two supporting plates, a containing groove penetrates through the upper plane of each mounting seat, a driving roller is arranged in each containing groove, a central shaft of the driving roller is arranged along the radial direction of the extension pipe, two ends of the driving roller are respectively rotatably inserted into two opposite side walls in the containing groove, an extension shaft extends from one outward end of the driving roller, the extension shaft exceeds the outer side wall of the mounting seat and a driving disc is coaxially arranged at the exceeding part of the extension shaft, connecting plates extend downwards from two sides of the outer peripheral surface of the driving disc, and a balancing weight is arranged between the end parts, far away from the driving disc, of the two connecting plates; the lower side wall of the driving roller is provided with a first magnetic part, and the front side wall of the driving roller is provided with a second magnetic part; the two sides of the lifting movable pipe are respectively and outwardly extended with a sliding seat which is one-to-one opposite to the two installation seats, a third magnetic part is embedded in the upper plane of the sliding seat, the magnetism of the third magnetic part is the same as that of the first magnetic part, the magnetism of the third magnetic part is opposite to that of the second magnetic part, vertical guide rails are respectively arranged on the two sides of the dust collecting opening on the upper plate surface of the upper support plate, sliding grooves for respectively and vertically sliding and clamping the two sliding seats are respectively and vertically arranged on the opposite side walls of the two guide rails, and the two balancing weights are respectively positioned on the outer sides of the two guide rails; a static grip is arranged on the front side of the dust collecting opening above the upper support plate, a transverse dynamic grip is arranged between the static grip and the lifting movable tube, horizontal guide rods fixed on the upper support plate are arranged between the dynamic grip and the lifting movable tube and on two sides of the lifting movable tube, the length direction of each guide rod is arranged along the plate surface direction of the support plate, each guide rod penetrates through a guide groove along the length direction of the guide rod, guide rods respectively inserted into the two guide grooves extend vertically from two ends of the dynamic grip, the length of each guide rod is greater than that of each guide rod, and the upper side surface of each guide rod is lower than or flush with the lower side wall of the driving disc; when the dust collecting opening is aligned with the exhaust pipe, the guide rod has two states:

in the first state, when the dynamic handle is horizontally close to the static handle, the guide rod is contracted, the balancing weight is sagged to drive the driving disc and the driving roller to rotate clockwise through the connecting plate, so that the first magnetic part is driven to overturn to the downward position, downward magnetic repulsive force is further provided for the third magnetic part, and the sliding seat slides downward along the sliding chute after being subjected to the magnetic repulsive force;

and in the second state, when the dynamic grip is horizontally far away from the static grip, the guide rod extends outwards to push the connecting plate and the balancing weight to be lifted to the horizontal state, so that the driving disc and the driving roller are driven to rotate anticlockwise, the second magnetic part is driven to overturn to a downward position, the second magnetic part provides upward magnetic adsorption force for the third magnetic part, and the sliding seat slides upwards along the sliding groove after receiving the magnetic adsorption force.

By adopting the scheme, when the dust collecting device with the dust collecting bag horizontally slides between the two supporting plates and the dust collecting port is vertically opposite to the exhaust pipe, the dynamic handle is pushed towards the direction far away from the static handle, the guide rod can extend out along the guide groove in the guide rod to overcome the gravity of the balancing weight to push the connecting plate on the driving disc to upwards overturn until the guide rod completely extends out, the connecting plate and the balancing weight are simultaneously in a horizontal state to drive the driving disc and the driving roller to anticlockwise rotate, so that the second magnetic part is driven to overturn to a downward position, the second magnetic part provides upward magnetic adsorption force for the third magnetic part, the sliding seat upwards slides along the sliding groove after receiving the magnetic adsorption force, so that the two sliding seats drive the lifting movable pipe and the upper end part of the telescopic pipe to upwards move until the lifting movable pipe is abutted to the lower port of the exhaust pipe, and the communication between the dust collecting port and the exhaust pipe is realized. On the contrary, the dynamic handle is pushed towards the direction close to the static handle, the guide rod can be contracted along the guide groove in the guide rod to relieve the support of the connecting plate and the balancing weight, the balancing weight is made to droop and the driving disc and the driving roller are driven to rotate clockwise through the connecting plate, so that the first magnetic part is driven to overturn to the downward position, the first magnetic part provides downward magnetic repulsive force for the third magnetic part, the sliding seat slides downwards along the sliding groove after receiving the magnetic repulsive force, so that the two sliding seats drive the lifting movable pipe and the upper end part of the telescopic pipe to move downwards, the lifting movable pipe is separated from the lower port of the exhaust pipe, the dust collecting opening and the exhaust pipe are cut off, the upper support plate and the lower support plate with the dust collecting bag can be smoothly moved out from the two support plates, and the operation convenience is improved.

Preferably, a support rod perpendicular to the support plate is connected between the two guide rods, and an elastic reset piece is arranged between the dynamic grip and the support rod so that the dynamic grip has a tendency of being far away from the static grip.

Adopt above-mentioned scheme for the developments handle has the automatic re-setting function, so that the guide bar has the trend of keeping the state of stretching out, thereby makes exhaust pipe and dust collection mouth can keep in the connected state, has promoted the operation convenience.

Preferably, an extension pipe is connected between the extension pipe and the exhaust pipe, and sealing blocks respectively used for sealing the upper ports of the containing grooves in the two mounting seats are arranged on two sides of the extension pipe.

Adopt above-mentioned scheme, sealed piece can effectively avoid the last port of storage tank to advance grey.

Preferably, the opposite plate surfaces of the two support plates are provided with horizontal limiting strips, the side surfaces of the guide rods are respectively abutted against the side surfaces of the corresponding side limiting strips, one ends of the guide rods, far away from the dynamic handle, are provided with elastic pieces in a position close to the corresponding side limiting strips in an extending manner along the length direction of the guide rods, the end parts of the elastic pieces, close to the corresponding side limiting strips, are provided with semicircular convex points in a direction close to the corresponding side limiting strips, the opposite side surfaces of the two limiting strips are continuously provided with a plurality of semicircular grooves for clamping and connecting the semicircular convex points along the length direction of the guide rods, the end parts of the limiting strips, close to the dynamic handle, are provided with notches for enabling the semicircular convex points to horizontally enter the semicircular grooves, the parts of the guide rods, far away from the dynamic handle, are provided with avoidance grooves for accommodating the elastic pieces and the semicircular convex points along the length direction, and the parts, close to the semicircular convex points, of the avoidance grooves are provided with locking blocks for preventing the elastic pieces and the semicircular convex points from entering the avoidance grooves;

after the guide rod is contracted, the avoiding groove slides to the position right opposite to the elastic sheet and the semicircular salient point along with the guide rod;

on the contrary, when the guide rod is completely extended out, the locking block slides to the position right opposite to the elastic sheet and the semicircular salient point along with the guide rod.

By adopting the scheme, when the guide rod is in a contraction state, the avoiding groove slides to the position right opposite to the elastic sheet and the semicircular salient point along with the guide rod, so that an avoiding space is provided for the bouncing of the elastic sheet and the semicircular salient point. At this moment, if the guide arm is pasted the side translation of spacing, the semicircle bump can overcome the elasticity of shell fragment and retract to dodge the inslot under semicircular groove's extrusion for semicircular bump can not receive semicircular groove's hindrance. In this state, the user can push the upper and lower support plates and the dust bag between them into the two support plates or pull the dust bag out from the two support plates by means of the handle formed by the dynamic grip and the static grip which are mutually pinched, so as to realize the replacement of the dust bag. On the contrary, when the guide rod is in a completely extended state, the locking block slides to the position right opposite to the elastic sheet and the semicircular salient point along with the guide rod. At the moment, the locking block locks the elastic sheet and the semicircular salient points so that the elastic sheet and the semicircular salient points cannot enter the avoiding groove. Under this state, the horizontal relative position between guide arm and the spacing is deadlocked to make upper and lower bottom suspension board and the dust bag between the two can't carry out the horizontal slip between two backup pads, make the user before taking out upper and lower bottom suspension board and the dust bag between the two, need break off exhaust pipe and dust collection mouth earlier, can prevent that the junction of exhaust pipe and dust collection mouth from pulling to draw and dragging the fracture, can promote operating efficiency and convenience again.

Preferably, a plurality of rotating shafts are arranged between the two supporting plates and in a position close to the base in a horizontal mode, the axial direction of each rotating shaft is perpendicular to the plate surfaces of the supporting plates, shaft holes for the rotating shafts to penetrate are formed in the plate surfaces of the supporting plates in a rotating mode, a plurality of coaxially arranged supporting rollers are axially arranged on the rotating shafts, a plurality of guide strips corresponding to the supporting rollers one by one are arranged on the lower plate surface of the lower supporting plate, and annular grooves for the guide strips to be clamped in a sliding mode are annularly arranged on the outer peripheral surfaces of the supporting rollers.

By adopting the scheme, the support roller can effectively support the lower support plate to limit the longitudinal position of the lower support plate above the base, so that the guide rod on the upper support plate can be accurately aligned with the limiting strip on the support plate. The rotating shaft can enable the supporting roller to maintain a circumferential rotation state so as to ensure the smoothness of the lower supporting plate during horizontal sliding. The cooperation of the joint that slides between the annular on the supporting roller and the gib block can limit down the extension board at the lateral position of base top, avoids down the extension board and takes place the lateral position skew at the in-process that slides above the base to guarantee that dust collection mouth and exhaust pipe can accurate counterpoint.

As preferred, the relative face of two backup pads all is provided with horizontally direction sand grip, and the groove that slides has all been seted up along its length direction to the side that two direction sand grips are relative, and the side that is located two spinal branch facies of rear side all is provided with the joint that slides respectively in two sliding grooves's sliding block.

Adopt above-mentioned scheme, the joint cooperation that slides between sliding block and the groove that slides, simple structure, it can further promote the accuracy nature of upper and lower supporting plate longitudinal orientation to make the position calibration between guide arm and the spacing more accurate.

Preferably, a limiting plate for limiting the transverse position of the upper support plate and the lower support plate is covered between the rear side edges of the two support plates.

Adopt above-mentioned scheme, the limiting plate can inject the upper and lower backup pad and get into the degree of depth between two backup pads to make the location between dust collection mouth and the exhaust pipe more high-efficient accurate.

Due to the adoption of the technical scheme, the invention has the remarkable technical effects that: the motor output shaft drives the saw blade to cut wood, the centrifugal fan can be driven to run simultaneously, so that the dust hood is in a negative pressure state, and the dust hood is also in a negative pressure state under the communication effect of the air guide pipe and the dust suction pipe. At the moment, the chip dust generated by the saw blade cutting the wood can be sucked into the dust cover through the opening, and then is sucked into the dust cover where the centrifugal fan is located through the dust suction pipe and the air guide pipe in sequence. Under centrifugal fan's drive, the piece dust can be discharged through the exhaust pipe to play dustproof effect, and then improve the operational environment of bench saw, reduce the injury to the human body simultaneously.

Drawings

FIG. 1 is a first schematic structural diagram of the present embodiment;

FIG. 2 is an exploded view of the first embodiment;

FIG. 3 is an exploded view of the second embodiment;

FIG. 4 is a schematic structural view of an air duct in the present embodiment;

FIG. 5 is an exploded view of the third embodiment;

FIG. 6 is an exploded view of a fourth embodiment;

FIG. 7 is an enlarged view of portion A of FIG. 6;

FIG. 8 is an enlarged view of portion B of FIG. 5;

FIG. 9 is a second schematic structural diagram of the present embodiment;

fig. 10 is an exploded view of the fifth embodiment;

FIG. 11 is an enlarged view of section C of FIG. 6;

FIG. 12 is a schematic structural view of the guide bar in the contracted state in this embodiment;

FIG. 13 is an enlarged view of portion D of FIG. 12;

FIG. 14 is a schematic structural view of the present embodiment in a state where the guide bar is extended;

FIG. 15 is an enlarged view of section E of FIG. 14;

FIG. 16 is an enlarged view of portion F of FIG. 6;

FIG. 17 is a schematic structural view of a guide bar and a guide bar in the present embodiment;

fig. 18 is an enlarged schematic view of the portion G shown in fig. 17.

The names of the parts designated by the numerical references in the above figures are as follows: 1. a work table; 2. a partition plate; 3. a saw blade; 4. a motor; 5. an output shaft; 6. an opening; 7. a dust cover; 8. a dust suction port; 9. a dust collection pipe; 10. a dust hood; 11. a centrifugal fan; 12. an air guide pipe; 13. an air outlet; 14. an exhaust duct; 15. a support frame; 16. a dust collecting device; 17. a dust collection bag; 19. a support plate; 20. a base; 21. an upper support plate; 22. a lower support plate; 23. a strut; 25. clamping the connecting pipe; 26. a dust collecting pipe; 27. an on-off mechanism; 28. an extension pipe; 29. lifting the movable tube; 30. a telescopic pipe; 31. a mounting seat; 32. a containing groove; 33. a drive roller; 34. an extension shaft; 35. a drive disc; 36. a connecting plate; 37. a balancing weight; 38. a first magnetic member; 39. a second magnetic member; 40. a sliding seat; 41. a third magnetic member; 42. a guide rail; 43. a chute; 44. a static grip; 45. a dynamic grip; 46. a guide bar; 47. a guide groove; 48. a guide bar; 49. a support bar; 50. an elastic reset member; 51. an extension tube; 52. a sealing block; 53. a limiting strip; 54. a spring plate; 55. semicircular convex points; 56. a semicircular groove; 57. a notch; 58. an avoidance groove; 59. a locking block; 60. a rotating shaft; 61. a shaft hole; 62. supporting the rollers; 63. a guide strip; 64. a ring groove; 65. a guide convex strip; 66. a sliding groove; 67. a sliding block; 68. a limiting plate; 69. sealing the cover; 70. an elastic sealing ring; 71. and a support member.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1 to 4, the dust-free table saw disclosed in this embodiment includes a working table 1, a vertical partition plate 2 is disposed below the working table 1, a circular saw blade 3 is disposed on one side of the partition plate 2, a motor 4 fixed on the lower plane of the working table 1 is disposed on the other side of the partition plate 2, an output shaft 5 of the motor 4 rotates to penetrate through the plate surface of the partition plate 2 and is fixed on the rotation center of the saw blade 3, an opening 6 for the saw blade 3 to be inserted is disposed on the working table 1, so that the upper edge of the saw blade 3 is located on the upper plane of the working table 1, and the size of the opening 6 is slightly larger than the size of the cross section of the saw blade 3, so that the saw blade 3 can stably operate in the opening 6. One side of the partition board 2 close to the saw blade 3 is provided with a dust cover 7 for covering the saw blade 3, a dust suction port 8 penetrates through the board surface of the partition board 2, one side of the dust suction port 8 close to the motor 4 is provided with a dust suction pipe 9, one end of the motor 4 far away from the saw blade 3 is provided with a dust suction cover 10, one end of an output shaft 5 of the motor 4 far away from the saw blade 3 is provided with a centrifugal fan 11, an axial air inlet surface of the centrifugal fan 11 is right opposite to the end surface of the dust suction cover 10, a radial air outlet surface of the centrifugal fan 11 is right opposite to the side surface of the dust suction cover 10, an air guide pipe 12 is communicated between the end surface of the dust suction pipe 9 far away from the dust suction port 8 and the end surface of the dust suction cover 10, an air outlet 13 communicated with the inner cavity of the dust suction cover 10 is arranged on the side surface of the dust suction cover 10 at the lower position, and the air outlet 13 is connected with an air exhaust pipe 14 downwards. In order to effectively collect the debris and dust discharged by the exhaust duct 14, a support frame 15 is arranged below the worktable 1, and a dust collecting device 16 connected to the exhaust duct 14 is arranged below the support frame 15.

As shown in fig. 5 to 10, in the present embodiment, the dust collecting device 16 includes a dust collecting bag 17 and a bracket fixed below the supporting frame 15, the bracket includes two vertical supporting plates 19 with two parallel plates facing each other, the upper ends of the two supporting plates 19 are fixed below the supporting frame 15, and a base 20 is disposed between the lower ends of the two supporting plates 19 to improve the stability of the bracket. Dust bag 17 is located between two backup pads 19, on dust bag 17, the downside is provided with respectively that the face is relative parallel arrangement's last extension board 21 and lower support plate 22, all be provided with branch 23 between four corners of last extension board 21 and lower support plate 22, the face of going up extension board 21 runs through there is the dust collection mouth, the below of dust collection mouth extends there is joint pipe 25, the last plane of dust bag 17 is provided with the interference and pegs graft the dust tube 26 in joint pipe 25, be provided with on-off mechanism 27 between exhaust pipe 14 and the dust collection mouth, on-off mechanism 27 has two states:

in the first state, when the dust bag 17 horizontally slides to the space between the two supporting plates 19 along with the upper supporting plate 21 and the lower supporting plate 22 and the dust collection port is aligned with the exhaust duct 14, the on-off mechanism 27 communicates the exhaust duct 14 and the dust collection port;

in the second state, when the dust collection port is ready to leave the exhaust duct 14 in the lateral direction, the on-off mechanism 27 can actively cut off the exhaust duct 14 and the dust collection port.

As shown in fig. 5 to 10, in order to realize the above functions of the on-off mechanism 27, the on-off mechanism 27 includes an extension pipe 28 disposed at a lower end of the exhaust pipe 14 and a lifting movable pipe 29 located between the extension pipe 28 and the dust collection opening, a telescopic pipe 30 is connected between the lifting movable pipe 29 and the dust collection opening, mounting seats 31 are disposed at two sides of the extension pipe 28 corresponding to the two support plates 19, a square receiving groove 32 penetrates through an upper plane of each mounting seat 31, a driving roller 33 is disposed in the receiving groove 32, a central axis of the driving roller 33 is disposed along a radial direction of the extension pipe 28, two ends of the driving roller 33 are respectively rotatably inserted into two opposite side walls in the receiving groove 32, an extension shaft 34 extends from an outward end of the driving roller 33, the extension shaft 34 exceeds an outer side wall of the mounting seat 31 and a driving disk 35 is coaxially disposed at an excess portion, two sides of an outer circumferential surface of the driving disk 35 both extend downward to form connecting plates 36, and a balancing weight 37 is disposed between ends of the connecting plates 36 far from the driving disk 35. The lower side wall of the driving roller 33 is provided with a first magnetic member 38, and the front side wall of the driving roller 33 is provided with a second magnetic member 39. The two sides of the lifting movable tube 29 are respectively extended outwards to form a square sliding seat 40 which is opposite to the two installation seats 31, a third magnetic part 41 is embedded in the upper plane of the sliding seat 40, and the first magnetic part 38, the second magnetic part 39 and the third magnetic part 41 are preferably permanent magnets. The magnetism of the third magnetic part 41 is the same as that of the first magnetic part 38, the magnetism of the third magnetic part 41 is opposite to that of the second magnetic part 39, vertical guide rails 42 are arranged on the two sides of the dust collecting opening of the upper support plate 21, sliding grooves 43 for longitudinally sliding and clamping two sliding seats 40 are vertically formed in the opposite side walls of the two guide rails 42, and the two balancing weights 37 are respectively located on the outer sides of the two guide rails 42. In order to prevent the slide seat 40 from being separated from the slide groove 43, a cover 69 for closing an upper end of the slide groove 43 is provided at an upper end of the guide rail 42. In order to improve the connection tightness between the extension pipe 28 and the lifting movable pipe 29, an elastic sealing ring 70 is annularly arranged at the lower port of the extension pipe 28, and the thickness of the elastic sealing ring 70 is larger than that of the sealing cover 69. A static grip 44 is arranged above the upper support plate 21 and in front of the dust collecting opening, a transverse dynamic grip 45 is arranged between the static grip 44 and the lifting movable tube 29, horizontal guide rods 46 fixed on the upper support plate 21 are arranged between the dynamic grip 45 and the lifting movable tube 29 and on two sides of the lifting movable tube 29, and the guide rods 46 and the static grip 44 are fixed above the upper support plate 21 through a support 71. Wherein, the length direction of the guide rods 46 is arranged along the plate surface direction of the supporting plate 19, each guide rod 46 penetrates through a guide groove 47 along the length direction, two ends of the dynamic grip 45 vertically extend to form guide rods 48 respectively inserted in the two guide grooves 47, the length of the guide rods 48 is greater than that of the guide rods 46, and the upper side surfaces of the guide rods 48 are lower than or flush with the lower side wall of the driving plate 35; when the dust collection port is aligned with the exhaust duct 14, the guide bar 48 has two states:

in the first state, when the dynamic grip 45 horizontally approaches the static grip 44, the guide rod 48 contracts, and the counterweight 37 droops to drive the driving disk 35 and the driving roller 33 to rotate clockwise through the connecting plate 36, so as to drive the first magnetic member 38 to turn over to the downward position, and further provide a downward magnetic repulsive force for the third magnetic member 41, and the sliding seat 40 slides downward along the sliding slot 43 after receiving the magnetic repulsive force;

in the second state, when the dynamic grip 45 is horizontally far from the static grip 44, the guide rod 48 extends outward to push the connecting plate 36 and the counterweight block 37 to be lifted to the horizontal state, so as to drive the driving disc 35 and the driving roller 33 to rotate counterclockwise, further drive the second magnetic member 39 to turn to the downward position, the second magnetic member 39 provides an upward magnetic attraction force for the third magnetic member 41, and the sliding seat 40 slides upward along the sliding groove 43 after receiving the magnetic attraction force.

As shown in fig. 7, a support rod 49 perpendicular to the support plate 19 is connected between the two guide rods 46, and an elastic restoring member 50 is disposed between the dynamic grip 45 and the support rod 49 to make the dynamic grip 45 have a tendency to move away from the static grip 44, in this embodiment, the elastic restoring member 50 is preferably a tension spring, and the tension spring is disposed between two ends of the support rod 49. One end of each tension spring is fixed on the side of the dynamic grip 45, and the other end is fixed on the side of the support rod 49.

As shown in fig. 8, in order to prevent dust from entering the upper port of the accommodating groove 32 in the mounting seat 31, an extension pipe 51 is connected between the extension pipe 28 and the exhaust pipe 14, and sealing blocks 52 for respectively sealing the upper ports of the accommodating grooves 32 in the two mounting seats 31 are respectively disposed on both sides of the extension pipe 51.

As shown in fig. 12 to 18, in order to enable the dust collecting port and the exhaust duct 14 to be accurately positioned before being communicated and to enable the dust collecting device 16 to be transversely pulled out, the dust collecting port can be separated from the exhaust duct 14 in advance, horizontal limiting strips 53 are arranged on the opposite plate surfaces of the two supporting plates 19, the side surfaces of the guide rods 46 are respectively abutted against the side surfaces of the corresponding side limiting strips 53, elastic pieces 54 extend along the length direction of the guide rods 46 at positions close to the corresponding side limiting strips 53 and far away from one ends of the dynamic handles 45, semicircular convex points 55 are arranged at the end portions of the elastic pieces 54 in the direction close to the corresponding side limiting strips 53, a plurality of semicircular grooves 56 for clamping the semicircular convex points 55 are continuously arranged on the opposite side surfaces of the two limiting strips 53 along the length direction, notches 57 for allowing the semicircular convex points 55 to horizontally enter the semicircular grooves 56 are arranged at the end portions of the limiting strips 53 close to the dynamic handles 45, protruding points 54 and protruding points 59 for preventing the semicircular convex points 54 and the protruding points 59 from entering the semicircular convex points 55 are arranged on the side surfaces of the guiding rods 48 close to the corresponding side limiting strips 53 in the length direction.

When the guide rod 48 contracts, the avoiding groove 58 slides to the position right opposite to the elastic sheet 54 and the semicircular salient point 55 along with the guide rod 48;

on the contrary, when the guiding rod 48 is fully extended, the locking block 59 slides to the position right opposite to the spring plate 54 and the semicircular salient point 55 along with the guiding rod 48.

As shown in fig. 5 and 11, in order to effectively define the longitudinal position and the transverse position of the lower support plate 22 between the two support plates 19, the stability and the smoothness of the horizontal sliding process of the lower support plate 22 are ensured. A plurality of rotating shafts 60 are horizontally arranged between the two supporting plates 19 and at a position close to the base 20, the axial direction of the rotating shafts 60 is perpendicular to the plate surfaces of the supporting plates 19, and the plate surfaces of the supporting plates 19 are provided with shaft holes 61 for the end parts of the rotating shafts 60 to rotate and penetrate. In order to increase stability and smoothness during the circumferential rotation of the rotating shaft 60, a bearing (not shown) is provided between the rotating shaft 60 and the shaft hole 61. A plurality of coaxially arranged support rollers 62 are axially arranged on the rotating shaft 60, a plurality of guide bars 63 corresponding to the support rollers 62 one by one are arranged on the lower plate surface of the lower support plate 22, and a ring groove 64 for slidably clamping the guide bars 63 is annularly arranged on the outer peripheral surface of the support rollers 62.

As shown in fig. 6, in order to further improve the accuracy of the longitudinal positioning of the lower support plate 22, the opposite plate surfaces of the two support plates 19 are provided with horizontal guide protruding strips 65, the opposite side surfaces of the two guide protruding strips 65 are provided with sliding grooves 66 along the length direction, and the opposite side surfaces of the two support rods 23 at the rear side are provided with sliding blocks 67 respectively slidably connected in the two sliding grooves 66.

As shown in fig. 6, in order to limit the depth of the upper support plate 21, the lower support plate 22 and the dust bag 17 therebetween horizontally entering between the two support plates 19, a limit plate 68 for limiting the lateral position of the upper support plate 21 and the lower support plate 22 is covered between the rear side edges of the two support plates 19.

The specific using process is as follows:

when the dust bag 17 is installed, the dust bag 17 is first placed between the upper support plate 21 and the lower support plate 22, and the dust pipe 26 is inserted into the clamping pipe 25 in an interference manner. Then, the upper support plate 21, the lower support plate 22 and the dust collection bag 17 which are integrally arranged horizontally slide to a position between the two support plates 19, the sliding blocks 67 on the outer sides of the two support rods 23 are respectively slid and clamped into the sliding grooves 66 of the guide convex strips 65 on the two sides, and the guide strips 63 at the bottom of the lower support plate 22 are slid and clamped into the annular grooves 64 of the support rollers 62, so that the longitudinal positioning and the transverse positioning of the lower support plate 22 are completed, and the two guide rods 46 are horizontally opposite to the limit strips 53 on the two sides. At this time, the static grip 44 and the dynamic grip 45 are pinched against the elastic pulling force of the elastic restoring member 50, so that the dynamic grip 45 slides horizontally toward the static grip 44, thereby driving the guide rod 48 in the guide rod 46 to contract horizontally (as shown in fig. 12 and 13), and the locking block 59 on the side of the guide rod 48 also contracts, so that the avoiding groove 58 faces the elastic sheet 54 and the semicircular convex point 55. In this state, the upper support plate 21 and the lower support plate 22 carrying the dust collecting bag 17 are pushed inward by the static grip 44, during the pushing process, the elastic sheets 54 and the semicircular protruding points 55 on the two guide rods 46 are horizontally slid and clamped into the semicircular grooves 56 of the two position-limiting strips 53 through the notches 57, and the semicircular protruding points 55 can be retracted into the escape grooves 58 by overcoming the elastic force of the elastic sheets 54, so that the upper support plate 21 and the lower support plate 22 can be smoothly pushed forward until the edges of the upper support plate 21 and the lower support plate 22 abut against the plate surface of the position-limiting plate 68, so that the lifting movable pipe 29 above the upper support plate 21 is opposite to the extension pipe 28 on the exhaust pipe 14. At this time, the dynamic grip 45 is loosened, so that the dynamic grip can be far away from the static grip 44 under the elastic action of the elastic resetting piece 50, the guide rods 48 at the two ends are driven to extend out of the guide rods 46, the locking block 59 extends out and supports against the elastic sheet 54 and the semicircular salient point 55, the semicircular salient point 55 is clamped in the semicircular groove 56 and cannot return, and the horizontal relative position between the guide rods 46 and the limiting strip 53 as well as the supporting plate 19 is locked.

As shown in fig. 14 and 15, after the guiding rod 48 is fully extended, it can overcome the gravity of the weight 37 to push the connecting plate 36 on the driving disc 35 to turn upward to a horizontal state, so as to drive the driving disc 35 and the driving roller 33 to rotate counterclockwise, thereby driving the second magnetic member 39 to turn downward, the second magnetic member 39 provides an upward magnetic attraction force for the third magnetic member 41, the sliding seat 40 slides upward along the sliding slot 43 after receiving the magnetic attraction force, so that the two sliding seats 40 drive the upper ends of the lifting movable tube 29 and the telescopic tube 30 to move upward until the lifting movable tube 29 abuts against the lower port of the exhaust duct 14, thereby achieving the communication between the dust collecting opening and the exhaust duct 14.

When the dust collecting opening is communicated with the exhaust duct 14, dust collection can be carried out. When the output shaft 5 of the motor 4 drives the saw blade 3 to cut wood, the centrifugal fan 11 can be driven to run at the same time, so that the dust hood 10 is in a negative pressure state, and the dust hood 7 is also in a negative pressure state under the communication effect of the air guide pipe 12 and the dust suction pipe 9. At this time, the dust generated when the saw blade 3 cuts the wood can be sucked into the dust cover 7 through the opening 6, and then, the dust can be sucked into the dust cover 10 where the centrifugal fan 11 is located through the dust suction pipe 9 and the air guide pipe 12 in sequence. Under the drive of the centrifugal fan 11, the chippings and dusts can be discharged through the exhaust duct 14 and finally enter the dust collection bag 17 through the extension duct 51, the extension duct 28, the extension tube 30, the dust collection opening, the clamping connection tube 25 and the dust collection tube 26 in sequence, so that the dustproof effect is achieved, the operation environment of the table saw is further improved, and meanwhile, the harm to a human body is reduced.

When the dust collecting bag 17 needs to be replaced, the static grip 44 and the dynamic grip 45 are first pinched again by overcoming the elastic pulling force of the elastic restoring member 50, so that the guide rod 48 in the guide rod 46 is horizontally contracted, and the locking block 59 on the side surface of the guide rod 48 is also contracted, so that the avoiding groove 58 is opposite to the elastic sheet 54 and the semicircular convex point 55. Under this state, the support under the connection plate 36 and the weight 37 is released, so that the weight 37 droops and the driving plate 35 and the driving roller 33 are driven by the connection plate 36 to rotate clockwise, thereby driving the first magnetic member 38 to turn to the downward position, the first magnetic member 38 provides a downward magnetic repulsion force for the third magnetic member 41, the sliding seat 40 slides downward along the sliding slot 43 after receiving the magnetic repulsion force, so that the two sliding seats 40 drive the upper ends of the lifting movable tube 29 and the extension tube 30 to move downward, so that the lifting movable tube 29 is separated from the lower port of the exhaust tube 14, thereby cutting off the dust collection opening and the exhaust tube 14, and the upper support plate 22 and the lower support plate 22 carrying the dust collection bag 17 can be smoothly moved out from between the two support plates 19. At this time, the upper stay 21 and the lower stay 22 carrying the dust bag 17 are pulled outward by the dynamic grip 45, and the semicircular protruding points 55 can be retracted into the escape grooves 58 against the elastic force of the elastic pieces 54, so that the upper stay 21 and the lower stay 22 can be smoothly pulled out. When the upper support plate 21 and the lower support plate 22 with the dust bag 17 are completely taken out, the dust pipe 26 is pulled out from the clamping pipe 25, and the dust bag 17 is detached from the space between the upper support plate 21 and the lower support plate 22 after cooling. Then, the above steps are repeated to replace the new dust bag 17.

Claims

1. A dust free table saw comprising a table (1), characterized in that: a vertical partition plate (2) is arranged below the workbench (1), a saw blade (3) is arranged on one side of the partition plate (2), a motor (4) fixed on the lower plane of the workbench (1) is arranged on the other side of the partition plate (2), an output shaft (5) of the motor (4) rotatably penetrates through the plate surface of the partition plate (2) and is fixed on the rotating center of the saw blade (3), and an opening (6) for inserting the saw blade (3) is formed in the workbench (1) so that the upper edge of the saw blade (3) is located on the upper plane of the workbench (1); a dust cover (7) used for coating the saw blade (3) is arranged on one side, close to the saw blade (3), of the partition plate (2), a dust suction opening (8) penetrates through the plate surface of the partition plate (2), a dust suction pipe (9) is arranged on one side, close to the motor (4), of the dust suction opening (8), a dust suction cover (10) is arranged at one end, far away from the saw blade (3), of the motor (4), a centrifugal fan (11) is arranged at one end, far away from the saw blade (3), of an output shaft (5) of the motor (4), an axial air inlet face of the centrifugal fan (11) is opposite to the end face of the dust suction cover (10), a radial air outlet face of the centrifugal fan (11) is opposite to the side face of the dust suction cover (10), an air guide pipe (12) is communicated between the port, far away from the dust suction opening (8) of the dust suction pipe (9) and the end face of the dust suction cover (10), an exhaust opening (13) communicated with the inner cavity of the dust suction cover (10) is formed in the side face of the dust suction cover (10) and in the lower position, and an exhaust outlet (13) is connected with an exhaust pipe (14) downwards.

2. The dust free table saw of claim 1, wherein: a supporting frame (15) is arranged below the workbench (1), and a dust collecting device (16) connected with the exhaust pipe (14) is arranged below the supporting frame (15).

3. The dust free table saw of claim 2, wherein: dust collecting device (16) include dust bag (17) and be fixed in the support of support frame (15) below, the support includes that two boards are parallel vertical support board (19) of relative setting, the upper end of two backup pad (19) all is fixed in the below of support frame (15), be provided with base (20) between the lower extreme of two backup pad (19), dust bag (17) are located between two backup pad (19), on dust bag (17), the downside is provided with extension board (21) and lower support board (22) respectively, all be provided with branch (23) between four corners of upper support board (21) and lower support board (22), the face of upper support board (21) has run through the dust collection mouth, the below of dust collection mouth extends has joint pipe (25), the last plane of dust bag (17) is provided with dust tube (26) of interference grafting in joint pipe (25), be provided with on-off mechanism (27) between exhaust pipe (14) and the dust collection mouth, on-off mechanism (27) have two states:

in the first state, when the dust bag (17) horizontally slides to the position between the two supporting plates (19) along with the upper supporting plate (21) and the lower supporting plate (22) and the dust collection port is aligned with the exhaust pipe (14), the on-off mechanism (27) is communicated with the exhaust pipe (14) and the dust collection port;

in a second state, when the dust collection opening is ready to leave the exhaust duct (14) transversely, the on-off mechanism (27) can actively cut off the exhaust duct (14) and the dust collection opening.

4. A dust free table saw as in claim 3 wherein: the on-off mechanism (27) comprises an extension pipe (28) arranged at the lower end of the exhaust pipe (14) and a lifting movable pipe (29) positioned between the extension pipe (28) and the dust collecting opening, a telescopic pipe (30) is connected between the lifting movable pipe (29) and the dust collecting opening, mounting seats (31) are arranged on the two sides of the extension pipe (28) corresponding to the two support plates (19), an accommodating groove (32) penetrates through the upper plane of each mounting seat (31), a driving roller (33) is arranged in the accommodating groove (32), a central shaft of the driving roller (33) is arranged along the radial direction of the extension pipe (28), two ends of the driving roller (33) are respectively rotatably inserted into two opposite side walls in the accommodating groove (32), an extension shaft (34) extends from one outward end of the driving roller (33), the extension shaft (34) exceeds the outer side wall of the mounting seat (31) and coaxially arranges a driving disc (35) at the exceeding part, two sides of the outer peripheral surface of the driving disc (35) extend downwards to form connecting plates (36), and a balancing weight (37) is arranged between the end parts of the two connecting plates (36) far away from the driving disc (35); a first magnetic part (38) is arranged on the lower side wall of the driving roller (33), and a second magnetic part (39) is arranged on the front side wall of the driving roller (33); the two sides of the lifting movable pipe (29) are outwards extended to form sliding seats (40) which are one-to-one opposite to the two installation seats (31), a third magnetic part (41) is embedded in the upper plane of the sliding seat (40), the magnetism of the third magnetic part (41) is the same as that of the first magnetic part (38), the magnetism of the third magnetic part (41) is opposite to that of the second magnetic part (39), vertical guide rails (42) are arranged on the two sides of a dust collecting opening of the upper plate (21), sliding grooves (43) for longitudinally sliding and clamping the two sliding seats (40) are vertically formed in the opposite side walls of the two guide rails (42), and the two balancing weights (37) are respectively positioned on the outer sides of the two guide rails (42); a static grip (44) is arranged on the upper side of the upper support plate (21) in front of the dust collecting port, a transverse dynamic grip (45) is arranged between the static grip (44) and the lifting movable tube (29), horizontal guide rods (46) fixed on the upper support plate (21) are arranged between the dynamic grip (45) and the lifting movable tube (29) and on two sides of the lifting movable tube (29), the length direction of each guide rod (46) is arranged along the plate surface direction of the support plate (19), guide grooves (47) penetrate through each guide rod (46) along the length direction of the guide rod, guide rods (48) respectively inserted into the two guide grooves (47) vertically extend from two ends of the dynamic grip (45), the length of each guide rod (48) is greater than that of the guide rod (46), and the upper side surfaces of the guide rods (48) are lower than or flush with the lower side wall of the drive plate (35); when the dust collecting opening is opposite to the exhaust duct (14), the guide rod (48) has two states:

in the first state, when the dynamic handle (45) is horizontally close to the static handle (44), the guide rod (48) is contracted, the balancing weight (37) sags, so that the connecting plate (36) drives the driving disc (35) and the driving roller (33) to rotate clockwise, the first magnetic part (38) is driven to overturn to the downward position, downward magnetic repulsive force is further provided for the third magnetic part (41), and the sliding seat (40) slides downward along the sliding groove (43) after receiving the magnetic repulsive force;

and in the second state, when the dynamic grip (45) is horizontally far away from the static grip (44), the guide rod (48) extends outwards to push the connecting plate (36) and the balancing weight (37) to be lifted to the horizontal state, so that the driving disc (35) and the driving roller (33) are driven to rotate anticlockwise, the second magnetic part (39) is driven to overturn to the downward position, the second magnetic part (39) provides upward magnetic adsorption force for the third magnetic part (41), and the sliding seat (40) slides upwards along the sliding groove (43) after receiving the magnetic adsorption force.

5. The dust free table saw of claim 4, wherein: a support rod (49) vertical to the support plate (19) is connected between the two guide rods (46), and an elastic reset piece (50) is arranged between the dynamic grip (45) and the support rod (49) so that the dynamic grip (45) has a trend of being far away from the static grip (44).

6. The dust free table saw of claim 4, wherein: an extension pipe (51) is connected between the extension pipe (28) and the exhaust pipe (14), and sealing blocks (52) respectively used for sealing the upper ports of the containing grooves (32) in the two mounting seats (31) are arranged on two sides of the extension pipe (51).

7. The dust free table saw of claim 4, wherein: horizontal limiting strips (53) are arranged on the opposite plate surfaces of the two supporting plates (19), the side surfaces of the guide rods (46) are respectively abutted to the side surfaces of the corresponding side limiting strips (53), a semicircular convex point (55) is arranged at the end part of each guide rod (46) far away from one end of the dynamic handle (45) and extends along the length direction of the corresponding side limiting strip (53) at the position close to the corresponding side limiting strip (53), a plurality of semicircular grooves (56) for clamping the semicircular convex points (55) are continuously arranged on the opposite side surfaces of the two limiting strips (53) along the length direction of the corresponding side limiting strip, a notch (57) for horizontally allowing the semicircular convex point (55) to enter the semicircular groove (56) is formed in the end part of each limiting strip (53) close to the dynamic handle (45), an avoiding groove (58) for accommodating the elastic sheet (54) and the semicircular convex point (55) is formed in the side surface of the guide rod (48) far away from the dynamic handle (45) and a locking block (59) for preventing the convex point (54) and the semicircular convex point (55) from entering the semicircular groove (59) is formed in the side surface of the semicircular convex point (53) along the length direction of the corresponding side limiting strip (58);

when the guide rod (48) is contracted, the avoiding groove (58) slides to the position right opposite to the elastic sheet (54) and the semicircular salient point (55) along with the guide rod (48);

on the contrary, when the guide rod (48) is completely extended, the locking block (59) slides to the position right opposite to the elastic sheet (54) and the semicircular salient point (55) along with the guide rod (48).

8. A dust free table saw as in claim 3 wherein: between two backup pads (19) and in the position horizontal arrangement who is close to base (20) have many pivot (60), the axial perpendicular to backup pad's of pivot (60) face, shaft hole (61) that the tip that supplies pivot (60) to rotate to wear to establish are seted up to the face of backup pad (19), axial arrangement has a plurality of coaxial supporting roller (62) that set up on pivot (60), the lower plate of lower backup pad (22) is provided with many guide bars (63) of a plurality of supporting roller (62) of one-to-one, the outer peripheral face ring of supporting roller (62) is equipped with annular (64) that supply guide bar (63) joint that slides.

9. The dust free table saw of claim 8, wherein: the relative face of two backup pads (19) all is provided with horizontally direction sand grip (65), and the side that two direction sand grips (65) are relative has all seted up along its length direction and has slided groove (66), and two spinal branch poles (23) that are located the rear side all are provided with the sliding block (67) that slide the joint respectively in two grooves (66) that slide.

10. A dust free table saw as in claim 3 wherein: a limit plate (68) used for limiting the transverse position of the upper support plate (21) and the lower support plate (22) is covered between the rear side edges of the two support plates (19).