CN113370544B

CN113370544B - Plastic floor welding machine

Info

Publication number: CN113370544B
Application number: CN202110484034.2A
Authority: CN
Inventors: 崔晟
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2024-02-13
Anticipated expiration: 2041-04-30
Also published as: CN113370544A

Abstract

The invention discloses a plastic floor welding machine, which comprises: the motor case comprises a case body, wherein a pair of motor tracks is arranged at the bottom of the case body, and a cabin is arranged inside the case body: the air-expelling device is arranged on the shell at the front side of the electric crawler belt in the travelling direction; the cutting device comprises a cutting box which is fixedly arranged on one side of the machine shell; the welding gun is fixed on the shell at one side of the cutting box, and a welding rod delivery pipe is arranged at one side of the end part of the welding gun; the pinch roller, the pinch roller rotates through the round pin axle to be connected on the casing of welder one side, and the device that catches up of setting will catch up the lower extreme and the plastic floor contact of air board through a pair of electric putter, will catch up with the unnecessary air in the plastic floor through the air board and discharge, keeps the roughness on ground, saves workman's the amount of labour simultaneously.

Description

Plastic floor welding machine

Technical Field

The invention belongs to the technical field of plastic welding equipment, and particularly relates to a plastic floor welding machine.

Background

The plastic floor is favored by public places due to the characteristics of ultra-light, ultra-thin, wear-resisting and the like, but when the plastic floor is paved, adjacent floors are required to be welded together, otherwise, the aesthetic degree is very influenced, but the welding of the plastic floor has multiple steps, the experience requirements on workers are higher, especially before welding, the plastic floor is required to be aerated and cut, the plastic floor is in close contact with the original ground, an air bag cannot exist, a large amount of dust falls into the cut welding seam when cutting, manual cleaning of workers is required, and in the prior art, most of welding of the plastic floor is carried out by the workers by holding a welding gun for welding the welding seam, so that the labor amount is large.

Disclosure of Invention

The present invention is directed to a plastic floor welding machine, which solves the above-mentioned problems.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the motor vehicle comprises a shell, wherein a pair of motor tracks are arranged at the bottom of the shell, and a cabin is arranged inside the shell.

Further, the cabin inside that sets up is cavity structure for electric transmission equipment such as battery and circuit board, through the power that a pair of electric caterpillar tracks that sets up moved as the casing, compares traditional universal wheel, and its load capacity is great. The movement is stable.

The air-expelling device is arranged on the shell at the front side of the electric crawler belt in the travelling direction.

Further, because before the welding of plastic floor, will give the roll-up to the air bag that produces when laying plastic floor, it is big through manpower air-expelling labour intensity, realize carrying out automatic roll-up air-expelling before the welding through the air-expelling device that sets up at the casing front end, use manpower sparingly resource.

The cutting device comprises a cutting box which is fixedly arranged on one side of the machine shell.

Furthermore, before welding, the ground needs to be grooved and cut, and when the cutting device is in operation, the cutting knife on the cutting machine is exposed out of the cutting box to groove, so that the cutting box can be retracted when the cutting box is not in use, and error collision is prevented.

And the welding gun is fixed on the shell at one side of the cutting box, and a welding rod delivery pipe is arranged at one side of the end part of the welding gun.

Furthermore, the arranged electrode lead-out pipe is used for fixing the position of the electrode, so that the welding gun is convenient to weld the welding strip into the cutting groove.

And the pinch roller is rotationally connected to the shell at one side of the welding gun through a pin shaft.

As a preferable scheme of the invention, the air-expelling device comprises a pair of first shaft seats and a pair of supporting rods, wherein the pair of first shaft seats are internally and respectively connected with an electric push rod in a rotating way, a pair of L-shaped fixing plates are fixedly arranged on a shell below the pair of first shaft seats, one ends of the pair of supporting rods are respectively connected with the outer sides of the vertical sections of the pair of L-shaped fixing plates in a rotating way through pin shafts, an air-expelling plate is fixedly arranged between the other ends of the pair of supporting rods, the back of the air-expelling plate is fixedly provided with a pair of second shaft seats, and the movable ends of the pair of electric push rods are rotatably connected in the pair of second shaft seats through pin shafts.

As a preferable scheme of the invention, a bottom plate is arranged at the bottom of the cutting box, a reinforcing rib is connected between the bottom plate and the cutting box, a pair of third shaft seats are fixedly arranged on two sides of the upper surface of the bottom plate along the length direction, a bearing plate is arranged on the bottom plate, a pair of fourth shaft seats are fixedly arranged on the lower surface of the bearing plate relative to the pair of third shaft seats, a pair of connecting pieces are rotationally connected between the pair of third shaft seats and the pair of fourth shaft seats, a driving piece is arranged on the bottom plate, and a cutting machine is fixedly arranged on the outer side of the lower surface of the bearing plate through bolts.

As a preferable scheme of the invention, each connecting piece comprises an upper rotating shaft, a lower rotating shaft and a pair of limiting plates, wherein the upper rotating shaft is rotationally connected between a pair of fourth shaft seats, the lower rotating shaft is rotationally connected between a pair of third shaft seats, two ends of the upper rotating shaft and the lower rotating shaft respectively penetrate through the fourth shaft seats and the third shaft seats, and one end of each penetrating through the fourth shaft seats and one end of each penetrating through the third shaft seats are rotationally connected with the limiting plates.

As a preferable scheme of the invention, the driving piece comprises a pair of fifth shaft seats, a screw rod is rotatably connected between the pair of fifth shaft seats, one end of the screw rod penetrates through the cutting box, the penetrated end is connected with the first motor through a coupling, the screw rod is slidably connected with a sliding block, two sides of the sliding block are rotatably connected with a sliding rod through a pin shaft, and one end of the sliding rod far away from the sliding block is coaxially sleeved on an upper rotating shaft on one side.

As a preferable scheme of the welding machine, a baffle is arranged on a shell above the pressing wheel, an L-shaped support is fixedly arranged on the shell between the baffle and the welding gun through bolts, a pressing pipe is fixedly clamped on the vertical section of the L-shaped support, a welding rod frame is fixedly arranged on the horizontal section of the L-shaped support through bolts, a stretching piece is arranged on the welding rod frame, and a cutting piece is arranged on the pressing pipe.

As a preferable scheme of the invention, the stretching piece comprises a mouth-shaped seat, a welding wire groove is welded and fixed on the mouth-shaped seat, a notch is formed in one side of the welding wire groove, a second motor is arranged in the mouth-shaped seat positioned at one side of the notch, the output end of the second motor penetrates through the mouth-shaped seat, an eccentric wheel is arranged at one penetrating end of the second motor, and a push rod is sleeved outside the eccentric wheel.

As a preferable scheme of the invention, the cutting piece comprises a U-shaped seat, a sleeve is fixedly arranged on the vertical section on one side of the U-shaped seat through a bolt, a notch is formed in the vertical section on the other side of the U-shaped seat, a pair of blades are rotatably connected in the notch through a pin shaft, track grooves are formed in the pair of blades, a sleeve rod is slidably connected in the sleeve in a sliding manner, a pair of connecting arms are welded at one end of the sleeve rod, which is positioned outside the sleeve, the pair of connecting arms are respectively and rotatably connected in the pair of track grooves through a pin shaft, a limit block is arranged at one end of the sleeve rod, which is positioned in the sleeve, a spring is connected between the limit block and the sleeve, and a cylinder is arranged at the bottom of the sleeve.

As a preferable scheme of the invention, the side wall in the cutting box is provided with the dust collection nozzle, the cutting box is provided with the dust collection box, and the dust collection nozzle is communicated with the dust collection box through the dust collection hose.

As a preferable scheme of the welding rod welding machine, a ratchet wheel is arranged on the welding rod frame, and a trimming knife is fixedly arranged on one side, away from the welding gun, of the baffle plate through bolts.

The invention has the beneficial effects that:

1. according to the invention, through the air-expelling device, the lower ends of the air-expelling plates are contacted with the plastic floor through the pair of electric push rods, and the redundant air in the plastic floor is exhausted through the air-expelling plates, so that the flatness of the ground is maintained, and meanwhile, the labor capacity of workers is saved.

2. According to the invention, the first motor is started through the cutting device, the output end of the first motor drives the screw rod to rotate, and the sliding block is connected to the screw rod in a sliding way, so that the first motor drives the screw rod to rotate to change the linear operation of moving the sliding block into the linear operation of moving the sliding block, when the sliding block moves, the sliding rod is driven to rotate, so that the bearing plate is controlled to approach the bottom plate, the cutting machine descends, the grooving on the ground is facilitated, dust is sucked into the dust collection box through the dust collection nozzle in the grooving process, the effect of cleaning a seam is achieved, and the cutting machine can be retracted into the cutting box when the cutting machine is not used, so that false touch is prevented.

3. According to the invention, through the arranged stretching piece, the eccentric wheel is driven to rotate by the second motor, the push rod is contacted with the welding rod through the notch, and the tooth pressure is arranged on the contact surface of the push rod and the welding rod and is used for increasing friction between the push rod and the surface of the welding rod, so that the welding rod is driven to move downwards, the welding rod is prevented from slipping back, and the next welding work is prepared.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic diagram of a gas-expelling device according to the present invention;

FIG. 3 is a schematic view of a cutting device according to the present invention;

FIG. 4 is a schematic view of a drawing member of the present invention;

FIG. 5 is an enlarged schematic view of the structure A in FIG. 1 according to the present invention;

fig. 6 is a schematic view of a cutting member structure according to the present invention.

In the figure: 1. a housing; 2. an electric track; 3. a nacelle; 4. a gas expelling device; 401. a first shaft seat; 402. an electric push rod; 403. an L-shaped fixing plate; 404. a support rod; 405. a gas expelling plate; 406. a second axle seat; 5. a cutting device; 501. a cutting box; 502. a bottom plate; 503. reinforcing ribs; 504. a third shaft seat; 505. a receiving plate; 506. a fourth shaft seat; 507. a connecting piece; 5071. an upper rotating shaft; 5072. a lower rotating shaft; 5073. a limiting plate; 508. a driving member; 5081. a fifth shaft seat; 5082. a screw rod; 5083. a first motor; 5084. a slide block; 5085. a slide bar; 509. a cutting machine; 6. a welding gun; 601. a welding rod leading-out pipe; 7. a pinch roller; 8. a baffle; 9. an L-shaped bracket; 10. pressing a pipe; 11. a welding rod frame; 12. a stretching member; 1201. a mouth-shaped seat; 1202. a wire bonding groove; 1203. a notch; 1204. a second motor; 1205. an eccentric wheel; 1206. a push rod; 13. cutting; 1301. a U-shaped seat; 1302. a sleeve; 1303. a notch; 1304. a blade; 13041. a track groove; 1305. a loop bar; 1306. a linking arm; 1307. a limiting block; 1308. a spring; 1309. a cylinder; 14. a dust suction nozzle; 15. a dust collection box; 16. a ratchet wheel; 17. and (3) trimming the knife.

Detailed Description

Examples

Referring to fig. 1-6, a plastic floor welding machine, comprising:

the motor vehicle comprises a machine shell 1, wherein a pair of motor tracks 2 are arranged at the bottom of the machine shell 1, and a cabin 3 is arranged inside the machine shell 1.

Further, the cabin 3 is provided with a cavity structure for electric transmission equipment such as a storage battery and a circuit board, and the load capacity of the electric crawler belt is larger compared with that of a conventional universal wheel by taking the pair of electric crawler belts 2 as power for movement of the casing 1. The movement is stable.

The air-expelling device 4, the air-expelling device 4 is arranged on the shell 1 at the front side of the electric crawler 2 in the traveling direction.

Further, because before the welding of plastic floor, will give the air bag that produces when laying plastic floor and roll up, it is big through manpower air-expelling labour intensity, realize carrying out automatic roll up before the welding and catch air through catch air device 4 that sets up at casing 1 front end, use manpower resources sparingly.

Cutting device 5, cutting device 5 includes cutting box 501, and cutting box 501 fixed mounting is in one side of casing 1.

Furthermore, before welding, the ground needs to be grooved and cut, and when the cutting device 5 is in operation, the cutting knife on the cutting machine 509 is exposed out of the cutting box 501 for grooving, and when not in use, the cutting box 501 can be retracted, so that false collision is prevented.

And a welding gun 6, wherein the welding gun 6 is fixed on the shell 1 at the side of the cutting box 501, and a welding rod leading-out pipe 601 is arranged at the side of the end part of the welding gun 6.

Further, the welding gun 6 is connected with elements in the cabin 3 through wires, and a welding rod guiding pipe 601 is arranged for fixing the welding rod position, so that the welding gun 6 can conveniently weld welding rods into the cutting groove.

The pinch roller 7, pinch roller 7 is connected on casing 1 of welder 6 one side through the round pin axle rotation.

Specifically, the air-expelling device 4 includes a pair of first shaft seats 401 and a pair of support rods 404, the electric push rods 402 are rotatably connected in the pair of first shaft seats 401, a pair of L-shaped fixing plates 403 are fixedly mounted on the casing 1 below the pair of first shaft seats 401, one ends of the pair of support rods 404 are respectively rotatably connected with the outer sides of the vertical sections of the pair of L-shaped fixing plates 403 through pins, an air-expelling plate 405 is fixedly mounted between the other ends of the pair of support rods 404, a pair of second shaft seats 406 are fixedly mounted at the back of the air-expelling plate 405, and movable ends of the pair of electric push rods 402 are rotatably connected in the pair of second shaft seats 406 through pins.

In a further embodiment: the lower end of the air-driving plate 405 is contacted with the plastic floor through the pair of electric push rods 402, the pair of support rods 404 are used for fixing the air-driving plate 405, the air-driving plate 405 is prevented from rotating when air is driven, and air cannot be discharged cleanly.

Specifically, the bottom of the cutting box 501 is provided with a bottom plate 502, a reinforcing rib 503 is connected between the bottom plate 502 and the cutting box 501, two sides of the upper surface of the bottom plate 502 along the length direction are fixedly provided with a pair of third shaft seats 504, the bottom plate 502 is provided with a bearing plate 505, the lower surface of the bearing plate 505 is fixedly provided with a pair of fourth shaft seats 506 relative to the pair of third shaft seats 504, a pair of connecting pieces 507 are rotationally connected between the pair of third shaft seats 504 and the pair of fourth shaft seats 506, a driving piece 508 is arranged on the bottom plate 502, and the outer side of the lower surface of the bearing plate 505 is fixedly provided with a cutting machine 509 through bolts.

In a further embodiment: the pair of connecting pieces 507 are driven to rotate by the driving piece 508, so that the receiving plate 505 approaches the bottom plate 502, and the cutting machine 509 descends to facilitate the slotting of the ground.

Specifically, each connecting piece 507 includes an upper rotating shaft 5071, a lower rotating shaft 5072 and a pair of limiting plates 5073, the upper rotating shaft 5071 is rotatably connected between a pair of fourth shaft seats 506, the lower rotating shaft 5072 is rotatably connected between a pair of third shaft seats 504, two ends of the upper rotating shaft 5071 and the lower rotating shaft 5072 respectively penetrate through the fourth shaft seats 506 and the third shaft seats 504, and one end penetrating through the upper rotating shaft 5071 is rotatably connected with the limiting plates 5073.

In a further embodiment: the upper rotating shaft 5071, the lower rotating shaft 5072 and the pair of limiting plates 5073 are matched with each other to form a parallelogram structure, and the bearing plate 505 is convenient to approach the bottom plate 502 due to instability of the parallelogram.

Specifically, the driving member 508 includes a pair of fifth shaft seats 5081, a screw rod 5082 is rotatably connected between the pair of fifth shaft seats 5081, one end of the screw rod 5082 penetrates through the cutting box 501, the penetrating end is connected with a first motor 5083 through a coupling, a sliding block 5084 is slidably connected on the screw rod 5082, two sides of the sliding block 5084 are rotatably connected with a sliding rod 5085 through a pin shaft, and one end, far away from the sliding block 5084, of the sliding rod 5085 is coaxially sleeved on an upper rotating shaft 5071 on one side.

In a further embodiment: by starting the first motor 5083, the output end of the first motor 5083 drives the screw rod 5082 to rotate, and as the slide block 5084 is connected to the screw rod 5082 in a sliding manner, the slide block 5084 is internally provided with internal threads matched with the screw rod 5082, so that the first motor 5083 drives the screw rod 5082 to rotate to be changed into linear operation for moving the slide block 5084, and when the slide block 5084 moves, the slide rod 5085 is driven to rotate, so that the distance of the bearing plate 505 to the bottom plate 502 is controlled, and meanwhile, the slide rod 5085 also plays a role in supporting the bearing plate 505.

Specifically, be provided with baffle 8 on the casing 1 of pinch roller 7 top, be provided with L shape support 9 through bolt fixed mounting on casing 1 between baffle 8 and the welder 6, the joint is fixed with pressure pipe 10 on the vertical section of L shape support 9, is located the horizontal section of L shape support 9 and is provided with welding rod frame 11 through bolt fixed mounting, is provided with tensile piece 12 on the welding rod frame 11, is provided with tailors 13 on the pressure pipe 10.

In a further embodiment: the welding rod frame 11 is rotatably sleeved with a welding rod roller, and a welding rod on the welding rod roller passes through the stretching piece 12 to the welding rod leading-out pipe 601, and the welded welding rod is pressed in the cutting groove through the arc-shaped pressing pipe 10.

Specifically, the stretching member 12 includes a mouth-shaped seat 1201, a welding wire groove 1202 is welded and fixed on the mouth-shaped seat 1201, a notch 1203 is opened on one side of the welding wire groove 1202, a second motor 1204 is disposed in the mouth-shaped seat 1201 on one side of the notch 1203, an output end of the second motor 1204 penetrates through the mouth-shaped seat 1201, an eccentric wheel 1205 is disposed at the penetrating end, and a push rod 1206 is sleeved outside the eccentric wheel 1205.

In a further embodiment: the eccentric wheel 1205 is driven to rotate by the second motor 1204, so that the push rod 1206 contacts with the welding rod through the notch 1203, and tooth pressure is formed on the contact surface of the push rod 1206 and the welding rod, so that friction between the push rod 1206 and the surface of the welding rod is increased, and the welding rod is driven to move downwards.

Specifically, the cutting member 13 includes a U-shaped seat 1301, a sleeve 1302 is fixedly mounted on a vertical section on one side of the U-shaped seat 1301 by a bolt, a notch 1303 is formed on a vertical section on the other side of the U-shaped seat 1301, a pair of blades 1304 are rotatably connected in the notch 1303 by a pin shaft, track grooves 13041 are formed on the pair of blades 1304, a sleeve rod 1305 is slidably connected in the sleeve 1302, a pair of engagement arms 1306 are welded at one end of the sleeve rod 1305 located outside the sleeve 1302, the pair of engagement arms 1306 are respectively rotatably connected in the pair of track grooves 13041 by a pin shaft, a limiting block 1307 is arranged at one end of the sleeve rod 1305 located inside the sleeve 1302, a spring 1308 is connected between the limiting block 1307 and the sleeve 1302, and a cylinder 1309 is arranged at the bottom of the sleeve 1302.

In a further embodiment: when welding is finished, the air cylinder 1309 drives the limiting block 1307 to push forwards, at the moment, the spring 1308 is in a compressed state, the pair of engagement arms 1306 move in the track groove 13041 through the pin shafts, the pair of blades 1304 are driven to rotate by taking the pin shafts in the notch 1303 as original points, and welding bars are cut.

Specifically, a dust collection nozzle 14 is mounted on the side wall in the cutting box 501, a dust collection box 15 is mounted on the cutting box 501, and the dust collection nozzle 14 is communicated with the dust collection box 15 through a dust collection hose.

In a further embodiment: when cutting, the dust suction nozzle 14 is started, and dust generated during cutting is sucked into the dust collection box 15, so that a cleaning effect is achieved.

Specifically, a ratchet wheel 16 is installed on the welding rod frame 11, and a leveling knife 17 is fixedly installed on one side of the baffle plate 8 away from the welding gun 6 through bolts.

In a further embodiment: the ratchet wheel 16 is arranged on the welding rod frame 11 to prevent the welding rod roller from reversing and affecting welding, and the knife edge of the leveling knife 17 is obliquely downward attached to the ground to scrape redundant cooling welding rods on two sides.

Working principle:

when in use, the welding rod on the welding rod roller passes through the stretching piece 12 to the welding rod delivery pipe 601, the pair of electric tracks 2 drives the shell 1 to move forwards, the lower end of the air-driving plate 405 is contacted with the plastic floor through the pair of electric push rods 402, the redundant air in the plastic floor is discharged through the air-driving plate 405, the first motor 5083 is started, the output end of the first motor 5083 drives the screw rod 5082 to rotate, as the slide block 5084 is connected on the screw rod 5082 in a sliding way, the slide block 5084 is internally provided with internal threads matched with the screw rod 5082, so that the work of driving the screw rod 5082 by the first motor 5083 to rotate is changed into the linear work of moving the slide block 5084, when the slide block 5084 moves, the slide rod 5085 is driven to rotate, the bearing plate 505 is controlled to approach the bottom plate 502, the cutter 509 descends, the slotting to the ground is convenient, and in the slotting process, dust is sucked into the dust collection box 15 through the dust collection nozzle 14, the welding machine achieves the effect of clearance, as the machine shell 1 moves forwards, the welding gun 6 welds welding strips into a cutting groove, the welded welding rods are pressed into the cutting groove through the arc-shaped pressing pipe 10, after welding is finished, the air cylinder 1309 drives the limiting block 1307 to push forwards, at the moment, the spring 1308 is in a compressed state, the pair of connecting arms 1306 move in the track groove 13041 through the pin shafts, the pair of blades 1304 are driven to rotate by taking the pin shafts in the notch 1303 as an origin, the welding strips are cut, in order to prevent the welding rods from slipping back, the ratchet wheel 16 is arranged on the welding rod frame 11, the second motor 1204 drives the eccentric wheel 1205 to rotate, the push rod 1206 is contacted with the welding rods through the notch 1203, tooth pressure is formed on the contact surface of the push rod 1206 and the welding rods, friction between the push rod 1206 and the surfaces of the welding rods is increased, the welding rods are driven to move downwards, and next welding operation is prepared.

Claims

1. A plastic floor welding machine, comprising: the motor vehicle comprises a machine shell (1), wherein a pair of motor tracks (2) is arranged at the bottom of the machine shell (1), and a cabin (3) is arranged inside the machine shell (1): the air-expelling device (4) is arranged on the casing (1) at the front side of the electric crawler belt (2) in the travelling direction; the cutting device (5), the cutting device (5) comprises a cutting box (501), and the cutting box (501) is fixedly arranged on one side of the machine shell (1); the welding gun (6), the welding gun (6) is fixed on the shell (1) at one side of the cutting box (501), and a welding rod delivery pipe (601) is arranged at one side of the end part of the welding gun (6); the pinch roller (7), pinch roller (7) are connected on casing (1) of welder (6) one side through the round pin axle rotation.

2. A plastic floor welding machine as defined in claim 1, wherein: the air-expelling device (4) comprises a pair of first shaft seats (401) and a pair of support rods (404), wherein the pair of first shaft seats (401) are internally and respectively connected with an electric push rod (402) in a rotating mode, a pair of L-shaped fixing plates (403) are fixedly installed on a machine shell (1) below the pair of first shaft seats (401), one ends of the support rods (404) are respectively connected with the outer sides of the vertical sections of the pair of L-shaped fixing plates (403) in a rotating mode through pin shafts, an air-expelling plate (405) is fixedly installed between the other ends of the support rods (404), a pair of second shaft seats (406) are fixedly installed at the back of the air-expelling plate (405), and movable ends of the electric push rods (402) are connected in the pair of second shaft seats (406) in a rotating mode through pin shafts.

3. A plastic floor welding machine as defined in claim 1, wherein: the cutting box is characterized in that a bottom plate (502) is arranged at the bottom of the cutting box (501), a reinforcing rib (503) is connected between the bottom plate (502) and the cutting box (501), a pair of third shaft seats (504) are fixedly arranged on the upper surface of the bottom plate (502) along the two sides of the length direction, a bearing plate (505) is arranged on the bottom plate (502), a pair of fourth shaft seats (506) are fixedly arranged on the lower surface of the bearing plate (505) relative to the pair of third shaft seats (504), a pair of connecting pieces (507) are rotatably connected between the pair of third shaft seats (504) and the pair of fourth shaft seats (506), a driving piece (508) is arranged on the bottom plate (502), and a cutting machine (509) is fixedly arranged on the outer side of the lower surface of the bearing plate (505) through bolts.

4. A plastic floor welding machine as claimed in claim 3, wherein: each connecting piece (507) comprises an upper rotating shaft (5071), a lower rotating shaft (5072) and a pair of limiting plates (5073), the upper rotating shaft (5071) is rotationally connected between a pair of fourth shaft seats (506), the lower rotating shaft (5072) is rotationally connected between a pair of third shaft seats (504), two ends of the upper rotating shaft (5071) and two ends of the lower rotating shaft (5072) respectively penetrate through the fourth shaft seats (506) and the third shaft seats (504), and one ends of the penetrating through ends are rotationally connected with the limiting plates (5073).

5. A plastic floor welding machine as defined in claim 4, wherein: the driving piece (508) comprises a pair of fifth shaft seats (5081), a pair of screw rods (5082) are rotatably connected between the fifth shaft seats (5081), one ends of the screw rods (5082) penetrate through the cutting box (501), the penetrated ends are connected with a first motor (5083) through a coupling, sliding connection with sliding blocks (5084) is arranged on the screw rods (5082), sliding rods (5085) are rotatably connected to two sides of the sliding blocks (5084) through pin shafts, and one ends, far away from the sliding blocks (5084), of the sliding rods (5085) are coaxially sleeved on an upper rotating shaft (5071) on one side.

6. A plastic floor welding machine as defined in claim 1, wherein: be provided with baffle (8) on casing (1) of pinch roller (7) top, there is L shape support (9) through bolt fixed mounting on casing (1) between baffle (8) and welder (6), joint is fixed with on the perpendicular section of L shape support (9) presses pipe (10), is located on the horizontal segment of L shape support (9) and has welding rod frame (11) through bolt fixed mounting, be provided with tensile piece (12) on welding rod frame (11), be provided with tailpiece (13) on pressing pipe (10).

7. A plastic floor welding machine as defined in claim 6, wherein: the stretching piece (12) comprises a mouth-shaped seat (1201), a welding wire groove (1202) is welded and fixed on the mouth-shaped seat (1201), a notch (1203) is formed in one side of the welding wire groove (1202), a second motor (1204) is arranged in the mouth-shaped seat (1201) positioned on one side of the notch (1203), an output end of the second motor (1204) penetrates through the mouth-shaped seat (1201), an eccentric wheel (1205) is arranged at one penetrating end of the second motor, and a push rod (1206) is sleeved outside the eccentric wheel (1205).

8. A plastic floor welding machine as defined in claim 6, wherein: the cutting piece (13) comprises a U-shaped seat (1301), a sleeve (1302) is fixedly arranged on the vertical section on one side of the U-shaped seat (1301) through bolts, a notch (1303) is formed in the vertical section on the other side of the U-shaped seat (1301), a pair of blades (1304) are rotatably connected in the notch (1303) through pins, track grooves (13041) are formed in the pair of blades (1304), a sleeve rod (1305) is slidably connected in the sleeve (1302), a pair of connecting arms (1306) are welded at one end of the sleeve rod (1305) outside the sleeve (1302), the pair of connecting arms (1306) are respectively and rotatably connected in the pair of track grooves (13041) through pins, a limit block (1307) is arranged at one end of the sleeve rod (1305) in the sleeve (1302), a spring (1308) is connected between the limit block (1307) and the sleeve (1302), and a cylinder (1309) is arranged at the bottom of the sleeve (1302).

9. A plastic floor welding machine as claimed in claim 3, wherein: a dust collection nozzle (14) is arranged on the side wall in the cutting box (501), a dust collection box (15) is arranged on the cutting box (501), and the dust collection nozzle (14) is communicated with the dust collection box (15) through a dust collection hose.

10. A plastic floor welding machine as defined in claim 6, wherein: the welding rod rack (11) is provided with a ratchet wheel (16), and one side of the baffle (8) far away from the welding gun (6) is fixedly provided with a leveling knife (17) through bolts.