CN211030346U

CN211030346U - Safe dustless portable plank cutting device

Info

Publication number: CN211030346U
Application number: CN201921610042.1U
Authority: CN
Inventors: 姜传垛
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-07-17
Anticipated expiration: 2029-09-26

Abstract

The utility model provides a safe and dust-free portable wood board cutting device, which belongs to the technical field of wood board cutting devices and comprises a cutting device, wherein a touch switch and a rack type braking device are arranged on the cutting device; the touch switch comprises a mounting seat, an inductive switch and a touch pressing piece; the rack type braking device comprises a rack mounting plate, a rack, a fixing bolt, a push-pull electromagnet, a pull rod, a thermal infrared human body sensor and a time relay. The cutting device has the advantages that the saw blade is triggered to rotate and brake rapidly while the wood board is placed, and the safety of the cutting device is effectively improved.

Description

Safe dustless portable plank cutting device

Technical Field

The utility model belongs to the technical field of plank cutting device, a safe dustless portable plank cutting device is specifically disclosed.

Background

The wood board cutting is a necessary process in the production process of interior decoration or furniture and the like, particularly, the cutting process is mostly carried out indoors during interior decoration, at present, hand-held cutting equipment is mostly adopted for cutting, the cutting efficiency is influenced, and the cutting quality is influenced due to instability in the hand-held process. Meanwhile, dust generated in the cutting process is harmful to human bodies greatly, and time and labor are consumed for cleaning the dust in the later period.

In order to improve the above problems, the applicant has developed and continuously improved various dust-free cutting devices, including CN201420200432.2 a floor cutting dust-removing saw, cn201620761335.x a floor cutting dust-removing box, and CN201621354420.0 portable dust-free sawn timber floor cutting device. The CN201621354420.0 portable dust-free sawn timber floor cutting device has achieved a good effect, when the device is used, a main switch is pressed down, an angle grinder is started, a saw blade starts to rotate, an operator aligns a wood board with the saw blade to start cutting, however, in the using process, the saw blade idles in the time period of starting and placing the wood board, safety accidents are easily caused, meanwhile, the cutting device adopts disc type braking, the saw blade is clamped and braked by brake discs on two sides of the saw blade, the rotation speed of the saw blade is large, braking is only carried out by friction force between the saw blade and the brake discs, the required time is long, and for the problems, the applicant improves the CN201621354420.0 portable dust-free sawn timber floor cutting device, and the safety of the device is improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a safe dustless portable plank cutting device triggers the rotatory and quick braking of saw bit when realizing placing the plank, has effectively improved cutting device's security.

In order to achieve the purpose, the utility model provides a safe and dust-free portable wood board cutting device, which comprises a cutting device, wherein a touch switch and a rack type braking device are arranged on the cutting device; the touch switch comprises a mounting seat, an inductive switch and a touch pressing piece; the mounting seat is fixed in the feeding direction of the saw blade; the induction switch is connected between a main switch of the cutting device and the fan and the angle grinder and is positioned below the mounting seat; the touch pressing piece comprises a touch pressing block and a touch pressing plate arranged on one side of the touch pressing block, which faces the saw blade; the upper edge of the touch pressure plate is inclined upwards, and part of the plate body is positioned in front of or behind the saw blade; the touch pressing block is inserted into the mounting seat, the top end and the upper edge of the touch pressing plate extend out of the saw blade opening of the cover plate, and the bottom end abuts against a contact of the induction switch; the rack type braking device comprises a rack mounting plate, a rack, a fixing bolt, a push-pull electromagnet, a pull rod, a thermal infrared human body inductor and a time relay; the rack mounting plate is arranged on the lower side of the saw blade and is positioned in front of the saw blade; the saw teeth of the rack are meshed with the saw teeth of the saw blade and arranged between the saw blade and the rack mounting plate; the fixing bolt sequentially penetrates through the rack mounting plate and the rack and then is connected with the back plate behind the saw blade; the push-pull electromagnet is fixed on one side of the saw blade, and a movable iron core of the push-pull electromagnet is vertical to the saw blade; the first end of the pull rod is fixedly connected with the rack, and the second end of the pull rod is fixedly connected with the movable iron core; the thermal infrared human body sensor is fixed in a lampshade of the cutting device and is electrically connected with a main power supply; the time relay is connected between the push-pull electromagnet and the thermal infrared human body sensor.

Further, the mounting seat comprises a front baffle, a rear baffle, a first side plate and a second side plate which are connected with the front baffle and the rear baffle; the front baffle is provided with a threaded column; the threaded column is sleeved with an adjusting nut; a first adjusting spring is sleeved on the threaded column between the adjusting nut and the front baffle; the first adjusting spring applies force to the front baffle plate to adjust the distance between the front baffle plate and the rear baffle plate.

Furthermore, a bulge is arranged at the edge of the first side plate; a limiting hole is formed in the front baffle; preceding baffle, backplate, first curb plate and second curb plate are buckled by the metal sheet and are formed, and the arch on the first curb plate inserts in the spacing hole of preceding baffle.

Further, the contact pressure block comprises a shell, a sleeve, a contact pressure bolt and a second adjusting spring; the touch pressing plate is arranged on the shell; the sleeve is of a hollow structure, the inner wall of the sleeve is provided with threads, and the sleeve is fixed in the shell; part of the screw rod of the contact bolt is connected in the sleeve in a threaded manner, and the head part of the contact bolt extends out of the lower end of the shell; the second adjusting spring is sleeved on the screw rod of the contact bolt exposed out of the sleeve, and two ends of the second adjusting spring are respectively abutted against the head of the contact bolt and the outer wall of the sleeve.

Further, a bearing is rotatably arranged at the top end of the shell; the central shaft of the bearing is vertical to the touch pressure plate.

Furthermore, a first strip-shaped hole and a second strip-shaped hole are formed in two sides of the rack mounting plate; the included angle between the first strip-shaped hole and the horizontal plane is 40 degrees or 45 degrees; the second strip-shaped hole is horizontally arranged; a first round hole and a second round hole which correspond to the first strip-shaped hole and the second strip-shaped hole are formed in the rack; a first positioning pin penetrates through the first strip-shaped hole and the first round hole; a second positioning pin penetrates through the second strip-shaped hole and the second round hole; the fixing bolt is located below the second strip-shaped hole.

Further, the rack brake device further includes a connecting rod; the end part of a movable iron core of the push-pull electromagnet is provided with a first pull ring; a second pull ring is arranged at the second end of the pull rod; the connecting rod passes through first pull ring and second pull ring fixed connection plug-type electro-magnet and pull rod.

Further, the rack brake device further comprises a first mounting box for accommodating the connecting rod, the first pull ring and the second pull ring; the first mounting box is fixed on a lateral side plate of the saw blade; the pull rod penetrates through a pull rod hole in the side plate; a first bearing and a second bearing are fixedly sleeved on the connecting rod; the first bearing is positioned between the first pull ring and the second pull ring; the second bearing is located below the second tab.

Further, a transformer is connected between the thermal infrared human body inductor and the main power supply.

Further, the rack type brake device also comprises an auxiliary dust suction pipe; the auxiliary dust collection pipe penetrates through the wall of a dust collection cavity of the cutting device, an air inlet positioned outside the dust collection cavity is communicated with a fixed support of a lampshade of the cutting device, and a baffle is arranged outside an air outlet positioned inside the dust collection cavity through a hinge; a return spring is sleeved on the rotating shaft; two ends of the return spring are respectively propped against the outer wall of the auxiliary dust collection pipe and the side face of the baffle plate facing the dust collection cavity.

The utility model discloses well cutting device is CN201621354420.0 portable dustless sawn timber floor cutting device or rather than the similar cutting device of principle structure, installs touch-type switch and rack formula arresting gear additional on it, and the theory of operation is as follows:

after the touch switch is additionally arranged, the cutting device has a normal mode and an induction mode, in the normal mode, the main switch is closed, the power supply supplies power to the fan and the angle grinder through the main switch, the saw blade is started firstly, and then the wood board is placed; in the induction mode, the main switch is switched off, the wood board is placed on the cover plate to start feeding, when the wood board presses the top end of the contact block, the contact block applies force to a contact of the induction switch, the induction switch is switched on, a power supply supplies power to the fan and the angle grinder through the induction switch, the saw blade rotates, the wood board continues to move, the contact block and the contact block are pressed simultaneously, the induction switch is continuously switched on, when the wood board continues to move to the saw blade and the length of the wood board is not enough to press the contact block downwards, only the contact block is pressed, the induction switch can still be in a closed state until the wood board is completely cut into two parts, the contact block is not pressed any more, the induction switch is automatically switched off and reset, and the contact block is jacke;

install rack formula arresting gear additional after, cover the lamp shade on the plank during use, the lamp shade both as the dust cover, the L ED lamp that the inside set up also has the illumination effect, when operating personnel pushed the plank to the saw bit, if limbs are less than safe distance from the saw bit distance, then can be perceived by hot infrared human sensor, hot infrared human sensor triggers, give signal of telecommunication to time relay, time relay gives plug-type electromagnet signal of telecommunication, plug-type electromagnet moves, movable core is adsorbed by static iron core, it removes to the saw bit direction to drive the pull rod, the rack will mesh with the saw bit, brake the saw bit.

From the above, compare with prior art, the utility model discloses following beneficial effect has:

the utility model provides a safe dustless portable plank cutting device has realized that it is rotatory to trigger the saw bit when placing the plank, has shortened saw bit idle running time, compares with the dish formula braking, and the braking force that the meshing provided is stronger, and brake speed is faster, can realize cutting device's quick braking, has effectively improved cutting device's security.

Drawings

FIG. 1 is a front view of a safe dust-free portable wood board cutting device provided by the embodiment;

FIG. 2 is a left side view of the cutting device shown in FIG. 1;

FIG. 3 is a right and rear view of the cutting device of FIG. 1;

FIG. 4 is a schematic view of the internal structure of the cutting device shown in FIG. 1;

FIG. 5 is a right side view of FIG. 4;

FIG. 6 is a schematic structural diagram of a touch switch in the cutting device;

fig. 7 is a front view of a contact member of the contact switch of fig. 6;

FIG. 8 is a right side view of the touch press of FIG. 7;

FIG. 9 is a schematic structural view of a rack mounting plate of the rack type braking device in the cutting device;

fig. 10 is a state view of the rack brake apparatus in a state where the saw teeth are normally rotated;

fig. 11 is a state view of the rack brake apparatus in a normal braking state of the saw teeth;

FIG. 12 is a schematic view of an auxiliary suction pipe of the cutting device;

FIG. 13 is a closed state view of the auxiliary suction pipe of FIG. 12;

FIG. 14 is an open state view of the auxiliary suction pipe of FIG. 12;

fig. 15 is an electrical schematic diagram of the cutting apparatus.

In the figure: 101-a saw blade; 102-main switch; 103-angle grinder; 104-a cover plate; 105-a lamp shade; 106-an inductive mode switch; 107-dust suction chamber; 108-a fixed support; 109-dust box; 110-a dust bag; a 111-U shaped connecting bag;

201-a mounting seat; 201.1-threaded post; 201.2-adjusting nut; 201.3-a first regulating spring; 201.4-bump; 202-an inductive switch; 203.1-touch block; 203.11-a housing; 203.12-a sleeve; 203.13-contact bolt; 203.14-second regulating spring; 203.15-bearing; 203.2-touch plate;

301-rack mounting plate; 301.1-a first strip aperture; 301.2-second strip aperture; 302-a rack; 302.1-first circular aperture; 302.2-second round hole; 303-fixing the bolt; 304-a push-pull electromagnet; 304.1-first tab; 305-a pull rod; 305.1-a second tab; 306-thermal infrared human body sensors; 307-time relay; 308-a first locator pin; 309-a second locating pin; 310-a connecting rod; 311-a first installation box; 312 — a first bearing; 313-a second bearing; 314-a second installation case;

401-auxiliary dust suction pipe; 402-a hinge; 403-a baffle; 404-return spring.

Detailed Description

The embodiment provides a safe dust-free portable wood board cutting device, which comprises a cutting device, wherein the cutting device is a CN201621354420.0 portable dust-free sawn wood floor cutting device or a cutting device similar to the principle structure of the cutting device, and a touch-press type switch and a rack type braking device are arranged on the cutting device; the touch switch comprises a mounting seat 201, an inductive switch 202 and a touch pressing piece; the mounting seat 201 is fixed in the feeding direction of the saw blade 101; the inductive switch 202 is connected between the main switch 102 of the cutting device and the fan and angle grinder 103 and is positioned below the mounting seat 201; the contact pressure piece comprises a contact pressure block 203.1 and a contact pressure plate 203.2 arranged on one side of the contact pressure block 203.1 facing the saw blade 101; the upper edge of the touch pressure plate 203.2 is inclined upwards, and part of the plate body is positioned in front of or behind the saw blade 101; the touch pressing block 203.1 is inserted into the mounting seat 201, the top end and the upper edge of the touch pressing block 203.2 extend out of the saw blade opening of the cover plate 104, and the bottom end abuts against a contact of the induction switch 2;

the rack type braking device comprises a rack mounting plate 301, a rack 302, a fixing bolt 303, a push-pull electromagnet 304, a pull rod 305, a thermal infrared human body inductor 306 and a time relay 307; the rack mounting plate 301 is arranged on the lower side of the saw blade 101 and is positioned in front of the saw blade 101; the saw teeth of the rack 302 are meshed with the saw teeth of the saw blade 101 and are arranged between the saw blade 101 and the rack mounting plate 301; the fixing bolt 303 sequentially penetrates through the rack mounting plate 301 and the rack 302 and then is connected with a back plate behind the saw blade 101, so that the rack mounting plate 301 and the rack 302 are fixed; the push-pull electromagnet 304 is fixed on one side of the saw blade 101, and a movable iron core of the push-pull electromagnet 304 is vertical to the saw blade 101; a first end of the pull rod 305 is fixedly connected with the rack 302, and a second end is fixedly connected with the movable iron core; the thermal infrared human body sensor 306 is fixed in the lamp shade 105 of the cutting device and is electrically connected with the main power supply; the time relay 307 is connected between the push-pull electromagnet 304 and the thermal infrared human body sensor 306.

The work engineering of the safe dust-free portable wood board cutting device is as follows:

the safe dust-free portable wood board cutting device has a normal mode and an induction mode, wherein in the normal mode, a main switch 102 is closed, a main power supply supplies power to a fan and an angle grinder 103 through the main switch 102, a saw blade 101 is started firstly, and then a wood board is placed; in the induction mode, the main switch 102 is turned off, a wood board is placed on the cover plate 104 and starts to feed (the direction indicated by an arrow in fig. 4 is the rotation direction of the saw blade 101), when the wood board presses the top end of the pressing block 203.1, the pressing block 203.1 applies force to the contact of the induction switch 202, so that the induction switch 202 is closed, the main power supply supplies power to the fan and the angle grinder 103 through the induction switch 202, the saw blade 101 rotates, the wood board continues to move, the pressing block 203.1 and the pressing plate 203.2 are pressed simultaneously, the induction switch 202 is continuously closed, when the wood board continues to move to the saw blade 101 until the length of the pressing block 203.1 is not enough to press, only the pressing plate 203.2 is pressed, the induction switch 202 can still be in the closed state until the wood board is completely cut into two parts, the pressing force is not applied, and the induction switch 202 automatically opens and resets the pressing piece;

when the wood saw is used, the lampshade 105 covers the saw blade 101, the lampshade 105 serves as a dustproof cover, L ED lamps arranged inside the lampshade also have an illumination effect, when an operator pushes the wood board to the saw blade 101, if the distance between a limb and the saw blade 101 is smaller than a safe distance, the limb can be sensed by the thermal infrared human body sensor 306, the thermal infrared human body sensor 306 is triggered to send an electric signal to the time relay 307, the time relay 307 gives an electric signal to the push-pull electromagnet 304, the push-pull electromagnet 304 acts, the movable iron core is adsorbed by the static iron core, the pull rod 305 is driven to move towards the saw blade 101, the rack 302 is meshed with the saw blade 101, and the saw blade 101 is.

Further, the safe dust-free wood board cutting device is further provided with an induction mode switch 106. In a normal mode, the main switch 102 is closed, the main power supply supplies power to the fan and the angle grinder 103 through the main switch 102, the saw blade 101 is started first, and then the wood board is placed; the sense mode switch 106 is closed and the main switch 103 is opened to enter the sense mode. Taking CN201621354420.0 portable dust-free sawn timber floor cutting device as an example, this embodiment gives a schematic circuit diagram, and persons in the electrical field can design circuits according to the schematic circuit diagram, and when the circuits of the cutting device are different, different circuit diagrams can be obtained.

Further, the mounting seat 201 includes a front baffle, a rear baffle, and a first side plate and a second side plate connecting the front baffle and the rear baffle; a threaded column 201.1 is arranged on the front baffle; an adjusting nut 201.2 is sleeved on the threaded column 201.1; a first adjusting spring 201.3 is sleeved on a threaded column 201.1 between the adjusting nut 201.2 and the front baffle; the first adjusting spring 201.3 applies force to the front baffle to adjust the distance between the front baffle and the rear baffle. The adjusting nut 201.2 is rotated towards the front baffle plate, the first adjusting spring 201.3 is pressed tightly, the front baffle plate is pressed towards the rear baffle plate, and the distance between the front baffle plate and the rear baffle plate is reduced; the adjusting nut 201.2 is rotated reversely, the first adjusting spring 201.3 resets, tension is generated on the front baffle, the front baffle is pulled outwards, and the distance between the front baffle and the rear baffle is increased. The distance between the front baffle and the rear baffle can be adjusted according to the thickness of the pressing block 203.1, and the pressing block 203.1 is guaranteed to be pressed down and reset smoothly without being blocked.

Further, a protrusion 201.4 is arranged at the edge of the first side plate; a limiting hole is formed in the front baffle; preceding baffle, backplate, first curb plate and second curb plate are buckled by the metal sheet and are formed, and protruding 201.4 on the first curb plate inserts the spacing downthehole of preceding baffle, encloses the synthetic space that holds touch-and-pressure piece 203.1 promptly. This embodiment uses a steel plate for bending.

Further, the inductive switch 202 is a travel switch or a trigger switch. The embodiment adopts a direct-acting travel switch.

Further, the touch block 203.1 comprises a housing 203.11, a sleeve 203.12, a touch bolt 203.13 and a second adjusting spring 203.14; the touch pressure plate 203.2 is arranged on the shell 203.11; the sleeve 203.12 is a hollow structure, has screw threads on the inner wall and is fixed in the outer shell 203.11; a portion of the shank of touch bolt 203.13 is threaded into bushing 203.12 with the head extending from the lower end of housing 203.11; the second adjusting spring 203.14 is sleeved on the screw rod of the contact bolt exposed out of the sleeve, and two ends of the second adjusting spring respectively abut against the head of the contact bolt 203.13 and the outer wall of the sleeve 203.12. The whole length of the touch pressing block 203.1 can be adjusted by rotating the touch pressing bolt 203.13, and the applicability is wider.

In the process that the wood plate moves towards the saw blade 101 when the lower pressing block 203.1 presses the pressing block 203.1, the wood plate can continuously contact with the top end of the pressing block 203.1 to move, friction force is generated, the top end of the pressing block 203.1 and the wood plate are abraded, and in order to improve the problem, a bearing 203.15 is rotatably arranged at the top end of the shell 203.11; the central axis of the bearing 203.15 is perpendicular to the touch pressure plate 203.2. The sliding friction is changed into rolling friction between the wood board and the bearing 203.15, so that the friction force is effectively reduced, and the abrasion of the top end of the contact pressure block 203.1 and the wood board is reduced.

Further, the outer case 203.11 is bent from a metal plate into a front flap, a rear flap, and side panels between the front flap and the rear flap; the touch pressing plate 203.2 is formed by cutting on the rear baffle; mounting holes are formed in the front baffle and the rear baffle; the central shaft of the bearing 203.15 is fixed in the mounting hole. The embodiment adopts the steel sheet, cuts out earlier and touches clamp plate 203.2 and mounting hole, and then buckles, bearing 203.15's center pin and mounting hole interference fit, bearing 203.15's inner circle and center pin interference fit.

Further, a first strip-shaped hole 301.1 and a second strip-shaped hole 301.2 are arranged on two sides of the rack mounting plate 301; the included angle between the first strip-shaped hole 301.1 and the horizontal plane is 40 degrees or 45 degrees; the second strip-shaped hole 301.2 is horizontally arranged; a first round hole 302.1 and a second round hole 302.2 corresponding to the first strip-shaped hole 301.1 and the second strip-shaped hole 301.2 are arranged on the rack 302; a first positioning pin 308 penetrates through the first strip-shaped hole 301.1 and the first round hole 302.1; a second positioning pin 309 penetrates through the second strip-shaped hole 301.2 and the second round hole 302.2; the fixing bolt 303 is located below the second elongated hole 301.2. The movement of the rack 302 is positioned by arranging the positioning pin, the movement direction perpendicular to the saw blade 101 is obtained, and the rack 302 is effectively prevented from moving left and right in the moving process.

Further, the arc length of the rack 302 is one third of the circumference of the saw blade 101 so that enough teeth are provided on the rack 302 to engage with the saw blade 101.

Further, the rack brake apparatus further includes a connecting rod 310; a first pull ring 304.1 is arranged at the end part of the movable iron core of the push-pull electromagnet 304; a second end of the pull rod 305 is provided with a second pull ring 305.1; the connecting rod 310 passes through the first pull ring 304.1 and the second pull ring 305.1 to fixedly connect the push-pull electromagnet 304 and the pull rod 305. Compared with non-detachable fixed connection such as welding or bonding, the mode not only realizes the fixed connection of the push-pull electromagnet 304 and the pull rod 305, but also realizes the detachable connection for convenient replacement.

Further, the rack brake apparatus further includes a first mounting case 311 for accommodating the connecting rod 310, the first tab 304.1 and the second tab 305.1; the first mounting box 311 is fixed on a lateral side plate of the saw blade 101; the tie rods 305 pass through tie rod holes in the side plates.

Further, the connecting rod 310 is fixedly sleeved with a first bearing 312 and a second bearing 313; the first bearing 312 is located between the first tab 304.1 and the second tab 305.1; the second bearing 313 is located below the second tab 305.1. In order to reduce the size of the rack type braking device, on the premise of ensuring the movement of the pull rod 305, the size of the first installation box 311 needs to be as small as possible, and in the process of pushing and pulling the pull rod 305 by the push-pull electromagnet 304, the first pull ring 304.1 and the second pull ring 305.1 are easy to collide and rub with the first installation box 11, so that the first bearing 312 and the second bearing 313 are arranged, and the friction force is effectively reduced.

Further, the angle between the pull rod 305 and the rack 302 is 160 to 170 degrees. Through repeated experiments of the inventor, when the included angle is 160 degrees to 170 degrees, the pull rod 305 has the best pulling effect on the rack 302.

Further, a transformer is connected between the thermal infrared human body sensor 307 and the main power supply.

Further, the rack brake apparatus further includes a second mounting case 314 for accommodating the push-pull electromagnet 304.

The safe dust-free portable wood board cutting device further comprises an auxiliary dust suction pipe 401; the auxiliary dust suction pipe 401 penetrates through the wall of a dust suction cavity 107 of the cutting device, an air inlet positioned outside the dust suction cavity 107 is communicated with a fixed support 108 of a lampshade 105 of the cutting device, and a baffle 403 is arranged outside an air outlet positioned inside the dust suction cavity 107 through a hinge 402; a return spring 404 is sleeved on a rotating shaft of the hinge 402; the two ends of the return spring 404 abut against the outer wall of the auxiliary suction pipe 401 and the side of the baffle 403 facing the suction chamber 107, respectively.

After the cutting device is started, a wood board is placed on a cover plate 104 of the cutting device to start feeding, a lampshade 105 covers the wood board, when the wood board completely covers a saw blade opening of the cover plate 104, a sealed space is formed in a dust suction cavity 107, vacuum is formed in the dust suction cavity 107 due to the vacuumizing action of a fan, the pressure in the lampshade 105 is larger than that in the dust suction cavity 107, a baffle 403 is pressed to turn outwards from an air outlet, the lampshade 105, a fixed support 108 and an air flow are formed between an auxiliary dust suction pipe 401 and the dust suction cavity 107, dust thrown out along the direction of the rotation tangent line of the saw blade enters the dust suction cavity 107 through the lampshade 105, the fixed support 108 and the auxiliary dust suction pipe 401, and auxiliary dust suction is realized. After the board is cut, the pressure in the dust suction chamber 107 is restored to be the same as the pressure in the lampshade 105 (both are normal air pressure), and the baffle 403 closes the air outlet of the auxiliary dust suction pipe 401 under the elastic force of the return spring 404.

Further, a dust bag 110 is placed in the dust box 109 of the cutting device; the dust bag 110 and the dust suction chamber 107 of the cutting device are connected by a U-shaped connection bag 111. The dust collecting bag 110 is placed in the dust collecting box 109, and the dust collecting bag 110 can be directly replaced after being filled with dust, so that the dust collecting box 109 does not need to be cleaned. Dust can temporarily stay at the corners of the U-shaped connection bag 111 for buffering.

The above is only the embodiment of the present invention, not limiting the scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the present invention, or directly or indirectly applied to other related technical fields, and all included in the same way in the protection scope of the present invention.

Claims

1. A safe dust-free portable wood board cutting device comprises a cutting device, and is characterized in that a touch switch and a rack type braking device are arranged on the cutting device;

the touch switch comprises a mounting seat, an inductive switch and a touch pressing piece;

the mounting seat is fixed in the feeding direction of the saw blade;

the induction switch is connected between a main switch of the cutting device and the fan and between the main switch and the angle grinder and is positioned below the mounting seat;

the touch pressing piece comprises a touch pressing block and a touch pressing plate arranged on one side of the touch pressing block, which faces the saw blade;

the upper edge of the touch pressure plate is inclined upwards, and part of the plate body is positioned in front of or behind the saw blade;

the touch pressing block is inserted into the mounting seat, the top end and the upper edge of the touch pressing plate extend out of a saw blade opening of the cover plate, and the bottom end abuts against a contact of the induction switch;

the rack type braking device comprises a rack mounting plate, a rack, a fixing bolt, a push-pull electromagnet, a pull rod, a thermal infrared human body inductor and a time relay;

the rack mounting plate is arranged on the lower side of the saw blade and is positioned in front of the saw blade;

the saw teeth of the rack are meshed with the saw teeth of the saw blade and are arranged between the saw blade and the rack mounting plate;

the fixing bolt sequentially penetrates through the rack mounting plate and the rack and then is connected with the back plate behind the saw blade;

the push-pull electromagnet is fixed on one side of the saw blade, and a movable iron core of the push-pull electromagnet is vertical to the saw blade;

the first end of the pull rod is fixedly connected with the rack, and the second end of the pull rod is fixedly connected with the movable iron core;

the thermal infrared human body sensor is fixed in a lampshade of the cutting device and is electrically connected with a main power supply;

the time relay is connected between the push-pull electromagnet and the thermal infrared human body sensor.

2. A safe, dust-free, portable plank cutting apparatus as claimed in claim 1, wherein the mount comprises a front fence, a rear fence, and first and second side plates connecting the front fence and the rear fence;

the front baffle is provided with a threaded column;

the threaded column is sleeved with an adjusting nut;

a first adjusting spring is sleeved on the threaded column between the adjusting nut and the front baffle;

the first adjusting spring applies force to the front baffle plate to adjust the distance between the front baffle plate and the rear baffle plate.

3. A safe, dust-free, portable plank cutting apparatus as claimed in claim 2, wherein the edge of the first side plate is provided with a protrusion;

a limiting hole is formed in the front baffle;

preceding baffle, backplate, first curb plate and second curb plate are buckled by the metal sheet and are formed, and the arch on the first curb plate inserts in the spacing hole of preceding baffle.

4. A safe, dust-free, portable plank cutting apparatus as claimed in claim 1, wherein the touch block comprises a housing, a sleeve, a touch bolt and a second adjustment spring;

the touch pressing plate is arranged on the shell;

the sleeve is of a hollow structure, the inner wall of the sleeve is provided with threads, and the sleeve is fixed in the shell;

part of screw rod of the contact bolt is connected in the sleeve in a threaded manner, and the head part of the contact bolt extends out of the lower end of the shell;

the second adjusting spring is sleeved on the screw rod of the contact bolt exposed out of the sleeve, and two ends of the second adjusting spring are respectively abutted against the head of the contact bolt and the outer wall of the sleeve.

5. A safe and dust-free portable wood cutting device according to claim 4, wherein a bearing is rotatably arranged at the top end of the housing;

the central shaft of the bearing is vertical to the touch pressure plate.

6. A safe and dust-free portable wood board cutting device according to claim 1, wherein a first strip-shaped hole and a second strip-shaped hole are formed in two sides of the rack mounting plate;

the included angle between the first strip-shaped hole and the horizontal plane is 40 degrees or 45 degrees;

the second strip-shaped holes are horizontally arranged;

a first round hole and a second round hole which correspond to the first strip-shaped hole and the second strip-shaped hole are formed in the rack;

a first positioning pin penetrates through the first strip-shaped hole and the first round hole;

a second positioning pin penetrates through the second strip-shaped hole and the second round hole;

the fixing bolt is located below the second strip-shaped hole.

7. A safe dust-free portable wood cutting device according to claim 1 or 6, wherein the rack brake further comprises a connecting rod;

a first pull ring is arranged at the end part of the movable iron core of the push-pull electromagnet;

a second pull ring is arranged at the second end of the pull rod;

the connecting rod passes through the first pull ring and the second pull ring to be fixedly connected with the push-pull type electromagnet and the pull rod.

8. A safe, dust-free, portable plank cutting apparatus as claimed in claim 7, wherein the rack brake further comprises a first mounting box for receiving the connecting rod, the first pull ring and the second pull ring;

the first mounting box is fixed on a lateral side plate of the saw blade;

the pull rod penetrates through a pull rod hole in the side plate;

a first bearing and a second bearing are fixedly sleeved on the connecting rod;

the first bearing is located between the first pull ring and the second pull ring;

the second bearing is located below the second tab.

9. A safe, dust-free, portable wood cutting device according to claim 1, wherein a transformer is connected between the thermal infrared human body sensor and a mains power supply.

10. A safe, dust-free, portable plank cutting apparatus as claimed in claim 1, further comprising an auxiliary suction duct;

the auxiliary dust collection pipe penetrates through the wall of a dust collection cavity of the cutting device, an air inlet positioned outside the dust collection cavity is communicated with a fixed support of a lampshade of the cutting device, and a baffle is arranged outside an air outlet positioned inside the dust collection cavity through a hinge;

a return spring is sleeved on a rotating shaft of the hinge;

two ends of the return spring are respectively abutted against the outer wall of the auxiliary dust collection pipe and the side face of the baffle plate facing the dust collection cavity.