CN109968432B - Floor back slotting equipment - Google Patents

Abstract

The invention discloses a floor back grooving device, which comprises: a base; the grooving main cutter shaft mechanism comprises a main shaft cutting motor, a servo jumping motor, an eccentric shaft rocker mechanism, a main shaft mounting rocker bracket and a saw blade cutter group, wherein the main shaft mounting rocker bracket is hinged on the base, the saw blade cutter group comprises a main shaft, the main shaft penetrates through one side of the main shaft mounting rocker bracket and is in driving connection with the main shaft cutting motor through a universal coupling, and the other side of the main shaft mounting rocker bracket is connected with one end of a rocker in the eccentric shaft rocker mechanism; an adjustable high pressure plate mechanism; and a roller transmission mechanism. The invention has the beneficial effects that the back of the floor board is grooved, the weight of the single floor board after grooving is reduced, the single container loading capacity is improved, the transportation efficiency is improved, the transportation cost is reduced, and meanwhile, the raw materials can be recycled.

Description

Floor back slotting equipment

Technical Field

The invention belongs to the field of floors, and particularly relates to floor back grooving equipment.

Background

Currently, the flooring industry generally employs container transportation, and it is common for LVT or SPC materials to be floor-mounted to a container half space to achieve the container transportation weight standard. The back grooving process is added in the floor production process, so that the weight of a single floor can be reduced while the back raw materials are reduced, the transportation efficiency is improved, and the transportation cost is reduced.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the floor back grooving equipment, which can be used for grooving the back of the floor along the length direction of the floor, and different numbers of saw blades are arranged according to different width sizes of the floor, so that different numbers of grooves can be processed, the maximum weight reduction is ensured, and the grooving depth and grooving length can be set according to a control program. According to different materials, different grooving depths and different grooving types, the single floor can reduce the weight by about 10-18 percent after grooving.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

a floor back grooving apparatus, the grooving apparatus comprising: a base; the grooving main cutter shaft mechanism comprises a main shaft cutting motor, a servo jumping motor, an eccentric shaft rocker mechanism, a main shaft mounting rocker bracket and a saw blade cutter group, wherein the main shaft mounting rocker bracket is hinged on the base, the saw blade cutter group comprises a main shaft, the main shaft penetrates through one side of the main shaft mounting rocker bracket and is in driving connection with the main shaft cutting motor through a universal coupler, the other side of the main shaft mounting rocker bracket is connected with one end of a rocker in the eccentric shaft rocker mechanism, the other end of the rocker is hinged with the eccentric shaft in the eccentric shaft rocker mechanism, and the eccentric shaft is in driving connection with the servo jumping motor; the adjustable high-pressure plate mechanism is arranged below the saw blade knife group and used for pressing the first surface of the floor board; the flexible carrier roller device is arranged below the adjustable high-pressure plate mechanism and used for supporting the second surface of the floor board; and

the number of the roller transmission mechanisms is two, the two groups of the roller transmission mechanisms are respectively arranged on the front side and the rear side of the slotting main cutter shaft mechanism, each roller transmission mechanism comprises an upper roller assembly and a lower roller assembly, and a gap for a floor board to pass through is reserved between the upper roller assembly and the lower roller assembly.

Preferably, the adjustable high-pressure plate mechanism comprises a pressure plate for pressing the first surface of the floor board, and a screw rod sliding block mechanism fixedly connected with the lower part of the pressure plate.

Preferably, the screw rod sliding block mechanism comprises two worm wheel screw rod lifters, lifting parts of the two worm wheel screw rod lifters are fixedly connected with the pressing plate, and the worm wheel screw rod lifters share a driving rotating shaft.

Preferably, the flexible carrier roller device comprises a first roller, a second roller and a first cylinder, wherein the first roller is positioned under the saw blade knife group and used as a lower support of a cutting position, two ends of the first roller are respectively connected with a moving part of the first cylinder, a cylinder body of the first cylinder is fixed on the base, the second roller is fixed on the base, and the second rollers are distributed on two sides of the first roller.

Preferably, the material of the first roller is steel.

Preferably, the roller transmission mechanism comprises an upper roller height adjusting device, and the upper roller height adjusting device comprises a wedge-shaped sliding block for bearing a third roller in the upper roller assembly and a first screw rod capable of moving the wedge-shaped sliding block.

Preferably, the slotting device further comprises a feeding protection height limiting device, and the feeding protection height limiting device is arranged at an inlet of one end of the roller transmission mechanism for feeding.

Preferably, the slotting device further comprises a dust collection shield, the dust collection shield covers the upper portion of the saw blade knife group, and the dust collection shield is communicated with the dust collection device.

Compared with the prior art, the invention has the beneficial effects that:

1. the back slotting equipment is used for slotting the back of the floor, the weight of a single floor after slotting is reduced, the single container loading capacity is improved, the transportation efficiency is improved, and the transportation cost is reduced. Meanwhile, the raw materials can be recycled;

2. the adjustable high-pressure plate mechanism can adjust the height of the floor according to different thicknesses, so that when the floor is conveyed to the saw blade processing position, the pressure plate presses the back of the floor, and the floor is kept in a stable and non-jumping state in grooving processing;

3. the first roller is used as a lower support of a cutting position, when the plate thickness exceeds a theoretical set value, the pressing plate can downwards press the floor, meanwhile, the first cylinder downwards presses, and the flexible device can ensure the depth precision of the cutting groove.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a right side schematic view of the overall structure of the present invention.

Fig. 2 is a left side schematic view of the overall structure of the present invention.

Fig. 3 is a cross-sectional view of the present invention.

Fig. 4 is a schematic view of the back grooving of the floor of the present invention.

Fig. 5 is a schematic view of a roller drive mechanism.

Fig. 6 is another schematic view of a roller drive mechanism.

Fig. 7 is a schematic diagram of a grooving station.

FIG. 8 is a schematic diagram of an adjustable high pressure platen mechanism.

Fig. 9 is a schematic view of a flexible idler assembly.

Fig. 10 is a schematic view of a feed protection height limiting device.

Fig. 11 is a schematic diagram of a device for realizing up-and-down movement in the slotting main cutter shaft mechanism.

Fig. 12 is a schematic view of an eccentric shaft.

FIG. 13 is a schematic view of an upper roller height adjustment device.

FIG. 14 is a schematic view of the construction of the upper roller assembly.

Fig. 15 is a schematic structural view of the rotating plate.

FIG. 16 is a schematic illustration of the cooperation of the upper roller assembly and the upper roller height adjustment device.

Fig. 17 is a schematic structural view of the height limiting module.

Fig. 18 is a schematic structural view of the anti-fly-back module.

Fig. 19 is a schematic structural view of a screw slider mechanism.

Fig. 20 is a partially enlarged schematic view of fig. 19 at a.

FIG. 21 is a schematic view of the press plate after structural explosion and assembly.

Fig. 22 is a schematic view of the structure of the saw blade set.

Fig. 23 is a schematic structural view of the limit bolt matched with the first cylinder.

Fig. 24 is a schematic structural view of the discharge cleaning device.

Fig. 25 is a schematic structural view of the brush unit.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

As shown in fig. 1 to 25, the present embodiment provides a floor back grooving apparatus, the grooving apparatus comprising:

a base 1;

the grooving main cutter shaft mechanism 2 comprises a main shaft cutting motor 21, a servo jumping motor 22, an eccentric shaft rocker mechanism, a main shaft mounting rocker arm bracket 23 and a saw blade cutter group 24, wherein the main shaft mounting rocker arm bracket 23 is hinged on the base 1, the saw blade cutter group 24 comprises a main shaft 241, a blade 242 and a plurality of adjusting plates 243, the blade 242 and the adjusting plates 243 are fixedly connected on the main shaft 241, the adjusting plates 243 have various specifications with different thicknesses and are used for adjusting the positions of the blades, so that the blades just can pass through a hollowed-out bar 351, the main shaft 241 passes through one side of the main shaft mounting rocker arm bracket 23 and is in driving connection with the main shaft cutting motor 21 through a universal coupler 25, the other side of the main shaft mounting rocker arm bracket 23 is connected with one end of a rocker 26 in the eccentric shaft rocker arm mechanism, the other end of the rocker 26 is hinged with an eccentric shaft 27 in the eccentric shaft rocker arm mechanism, and the eccentric shaft 27 is in driving connection with the servo jumping motor 22;

the adjustable high-pressure plate mechanism 3 is arranged below the slotting main cutter shaft mechanism 2 and used for pressing the first surface of the floor board, the adjustable high-pressure plate mechanism 3 comprises a pressure plate used for pressing the first surface of the floor board and a screw rod sliding block mechanism fixedly connected with the lower part of the pressure plate, the lower part of the pressure plate is fixedly connected with the screw rod sliding block mechanism, the pressure plate comprises a bakelite plate 35 and a steel plate 36, a plurality of hollow strips 351 which are arranged in parallel are arranged on the bakelite plate 35, a cavity for accommodating the bakelite plate 35 is arranged in the middle of the steel plate 36, screw holes are formed in the peripheries of the steel plate 36 and the bakelite plate 35, and the steel plate 36 is fixedly connected with the bakelite plate 35 through bolts; the screw rod sliding block mechanism comprises an upper connecting plate 33, a lower connecting plate 34 and two worm wheel screw rod lifters 31, wherein the worm wheel screw rod lifters 31 are parallelly fixed on the lower connecting plate 34, lifting parts of the worm wheel screw rod lifters 31 are fixedly connected with the upper connecting plate 33, the worm wheel screw rod lifters 31 share a driving rotating shaft 32, the lower connecting plate 34 is fixedly connected on the base 1, and the upper part of the upper connecting plate 33 is fixedly connected with the steel plate 36; the two sides of the upper connecting plate 33 are provided with sliding blocks 331 in parallel, and the lower connecting plate 34 is provided with sliding rails 332 corresponding to the sliding blocks 331; the sliding block 331 is also connected with a filling nozzle 333; a counter is connected to the driving shaft 32 for displaying the height of the pressing plate; the combination of the bakelite plate and the steel plate enables the bakelite material cut by the blade to be treated together with the floor cutting material, the material hardness of the bakelite plate is low, the blade cannot be damaged, meanwhile, the bakelite plate is embedded in the steel plate, the strength of the integral pressing plate is high, the floor is pressed firmly enough, and the reduction of the grooving precision caused by the fact that the floor is not pressed tightly in the grooving process is prevented;

the flexible carrier roller device 4 is arranged below the adjustable high-pressure plate mechanism 3 and used for supporting the second surface of the floor board; the flexible carrier roller device 4 comprises a first roller 41, a second roller 42 and a first air cylinder 43, wherein the first roller 41 is positioned under the saw blade knife tackle 24 and is used as a lower support of a cutting position, two ends of the first roller 41 are respectively connected with a moving part of the first air cylinder 43, a cylinder body of the first air cylinder 43 is fixed on the base 1, the moving part of the first air cylinder 43 is also fixedly connected with a clamping plate 44, a limit bolt 45 is connected between the clamping plate 44 and the base 1, the second roller 42 is fixed on the base 1, the second roller 42 is distributed on two sides of the first roller 41, the first roller 41 is made of steel, and the second roller 42 is made of rubber; two second rollers 42 are arranged on two sides of the first roller 41; the maximum extension stroke of the first cylinder is adjusted by adjusting the length of the limit bolt, and the elastic force of the first cylinder with different extension degrees gives the supporting force of the first roller with different magnitudes, so that the supporting requirements of floors with different thicknesses are met;

the upper roller assembly 51 and the lower roller assembly 52 comprise two third rollers 54 which are arranged in parallel, the upper roller heightening device comprises a wedge-shaped slide block 531 which carries the third rollers in the upper roller assembly and a first screw 532 which can move the wedge-shaped slide block 531, two ends of the third rollers in the upper roller assembly are hinged and fixed on a rotating plate 55, a rotating shaft 56 is arranged on the rotating plate 55 in a penetrating way, the rotating plate 55 can rotate around the rotating shaft, the upper part of the rotating plate 55 is connected with a moving part of a second cylinder 57, a main body of the second cylinder 57 is fixed on two side brackets of the upper roller assembly, the lower part of the rotating plate 55 is supported by the wedge-shaped slide block, and two ends of the third rollers in the lower roller assembly are fixed on two side brackets of the lower assembly; the rotating shaft is parallel to the third roller, the rotating plate is hinged and fixed on the rotating shaft through a bearing, and the third roller in the upper roller assembly is hinged and fixed on the rotating plate through a bearing; the upper roller and the lower roller are driven by the upper roller and the lower roller, and the lower roller is fixed on the frame through a bearing and a locking expansion sleeve; one end of the upper roller is hinged to the frame, and the sliding block is pushed or pulled by the screw rod to move in the sliding groove, so that the other end of the upper roller continuously compresses the inclined surface on the sliding block under the action of the upper pressure cylinder, and the upper roller is lifted along with the lifting of the inclined surface of the sliding block; a dial indicator is arranged on a sliding block with the same external height and the same slope and is used for detecting the height change value of a third roller in the upper-height roller assembly; the dial indicator is adopted, so that the adjustment to a proper height is convenient;

a first chain 581 and a first motor 583 are arranged on the left side of the roller transmission mechanism 5, a second chain 582 is arranged on the right side of the roller transmission mechanism 5, the first chain 581 is wound on the two lower roller assemblies 52, the second chain 582 is wound on the two upper roller assemblies 51, the first motor 583 is in driving connection with a transmission shaft 584, a first end 5841 of the transmission shaft is in driving connection with the first chain 581 and is arranged on the outer side of the first chain 581, and a second end 5842 of the transmission shaft is in driving connection with the second chain 582 and is arranged on the inner side of the second chain 582, so that the lower roller assemblies 52 and the upper roller assemblies 51 reversely rotate; the roller transmission mechanism 5 further comprises a plurality of first guide wheels 585 and second guide wheels 586, wherein the shaft of the first guide wheels 585 is fixedly connected to the base 1 and is used for changing the trend of the first chain 581 or the second chain 582; the shaft of the second guide wheel 586 is slidably disposed on the base 1, a third cylinder 587 is further fixed on the base 1, and a moving part of the third cylinder 587 is fixed on the second guide wheel, so as to tension the first chain 581 or the second chain 582; a coding counter is arranged on the third roller 54; the coding counter is convenient and visual to display, and the rotating speed of the roller assembly is adjusted by adjusting the frequency of the first motor; the trend of the first chain 581 or the second chain 582 is changed, so that more meshing teeth are arranged between the first chain 581 or the second chain 582 and a driven piece, and the driving stability is enhanced; the base 1 is provided with a second sliding rail, a second sliding block is arranged on the second sliding rail, and the second sliding block is fixedly connected with the shaft of the second guide wheel;

the feeding protection height limiting device 6 is arranged at an inlet of one end of the roller transmission mechanism 5 for feeding, the feeding protection height limiting device 6 sequentially comprises a height limiting module 61 and an anti-falling module 62 according to feeding sequence, the height limiting module 61 comprises a proximity switch 611, a group of height adjusting bolts 612 and height limiting plates 613 on the left side and the right side, the proximity switch 611 and the height adjusting bolts 612 are both fixed on the base 1, a shaft lever 6131 is fixed on the height limiting plates 613, two ends of the shaft lever 6131 are hinged to the head of the height adjusting bolts 612, a transmission rod is connected between the proximity switch 611 and the height limiting plates 613, and the proximity switch 611 is electrically connected with power supply equipment of slotting equipment; the anti-fly-back module 62 comprises a baffle 621 hinged on the base 1, and a group of buffer devices 622 fixed on the left side and the right side of the base 1, wherein the elastic moving end of the buffer devices 622 is abutted against one side of the baffle 621 away from the roller transmission mechanism 5; when the feeding abnormality occurs that a plurality of groups of bottom plates are overlapped together, the height limiting plate rotates around the shaft rod, so that the transmission rod is driven, the proximity switch is triggered, and the power supply of the equipment is closed; the height of the height-adjusting bolt on the base can be adjusted through two nuts so as to adapt to floor specifications with different heights, the buffer device is an air cylinder, a certain elasticity redundancy is provided for the hinged baffle plate, the energy of the floor when the feeding material is abnormally fallen is absorbed, the vibration caused by falling is reduced, the damage to machine equipment is prevented, the reliability of the machine is improved, and the service life of the machine is prolonged;

a main dust collection shield 7, wherein the main dust collection shield 7 is arranged above the saw blade knife group 24 in a covering way, the main dust collection shield 7 is communicated with dust collection equipment, and a plurality of static eliminating rods are arranged on the inner side wall of the main dust collection shield 7;

the discharging and cleaning device 8, wherein the discharging and cleaning device 8 is arranged behind the roller transmission mechanism 5 at the rear side, the discharging and cleaning device 8 comprises a brush roller 81, sliding blocks 82 fixedly connected to two ends of the brush roller 81, a second screw rod 83 fixedly connected to the sliding blocks 82 on two moving blocks, two steering boxes 84 connected with rotating shafts of the second screw rod 83, and an adjusting shaft 85 penetrating through the two steering boxes 84, and the brush roller 81 is in driving connection with the first motor 583; two ends of the brush roller 81 are hinged on the base 1, and one end of the brush roller 81 is connected with one end of the third roller 54 through a belt or a chain; the brush roller 81 includes a plurality of brush units 811, both ends of the brush units 811 being saw-toothed; the discharging cleaning device 8 further comprises an auxiliary dust collection shield 86, the auxiliary dust collection shield 86 is arranged at the upper part of the brush roller 81 in a covering mode, and the auxiliary dust collection shield 86 is communicated with dust collection equipment; the base 1 is provided with a track corresponding to the sliding block 82, and the track comprises two long shafts 87 which are arranged on two sides of the rotating shaft of the second screw 83 in parallel.

The base is formed by welding steel plates and sectional materials and is mainly used for installing a frame structure and a motor bracket, and supporting and leveling the whole working part is provided.

The roller transmission mechanism comprises: the device comprises a motor, an upper transmission roller, a lower transmission roller, a transmission chain wheel chain, an upper compression roller wheel height adjusting device, a chain tensioning mechanism and the like. The power transmission process comprises a motor, a transmission shaft, chain wheels at two sides, chains and upper and lower rollers. According to the thickness of the floor, the upper press roller drum height adjusting device is adjusted, the distance between the upper press roller drum and the lower press roller drum is slightly smaller than the thickness of the plate, a certain pressing force is ensured when the floor is driven on the rollers, the force for grooving the saw blade is overcome to drive, the saw blade is driven to a grooving position from a feeding end to grooving, and then the saw blade is transmitted from a discharging hole.

The slotting main cutter shaft mechanism comprises: the main shaft cutting motor, the servo jumping motor, the eccentric shaft rocker mechanism, the main shaft mounting rocker bracket, the saw blade knife group and the like. When the automatic cutting machine works, the motor transmits power to the main shaft through the universal shaft to drive the saw blade knife group to rotate, the servo jumping motor controls the eccentric shaft to rotate according to program parameter setting, the eccentric shaft drives the rocker, and the rocker drives the knife shaft to install the rocker bracket, so that the main knife shaft which rotates completes the up-down cutting action, and then the floor which is transmitted to the processing position is grooved.

The adjustable high-pressure plate mechanism consists of a mounting seat, a screw rod sliding block mechanism and a pressure plate, and can be adjusted in height according to floors with different thicknesses, so that the pressure plate presses the back of the floor when the floor is conveyed to a saw blade machining position, and the floor is kept in a stable and non-jumping state in grooving machining.

The flexible carrier roller device comprises a roller mounting seat, a plurality of groups of rollers and air cylinders, wherein the position right below a cutting shaft is a steel roller, two ends of the steel roller are supported by the air cylinders and serve as lower supports of the cutting positions, when the plate thickness exceeds a theoretical set value, a pressing plate can downwards press a floor, meanwhile, the air cylinders are supported by the steel roller to downwards press, and the flexible device can ensure the depth precision of a cutting groove.

The feed protection height limiting device prevents floors above the design height or two floors from overlapping together into the apparatus. Meanwhile, the floor cutting machine also has a safety protection function, and prevents the floor from being damaged by flying out of the feed inlet due to the fact that the floor is not pressed by the transmission roller during cutting.

The pneumatic system consists of air source treatment, pressure regulating meter, solenoid valve, adaptor, auxiliary part and air pipe, and is used to provide air source for the pneumatic components of the whole equipment and to regulate pressure.

The main dust collection shield is connected with a factory dust collection system and mainly used for recycling waste materials cut in the slotting process.

The electric control system consists of electric elements such as a power supply, a safety device, a switch device, a control device, an electric cabinet, a cable and the like. The system is used for controlling each mechanism to operate according to a given process and program rhythm.

The equipment can work singly, the front end and the rear end of the equipment are connected with a feeding conveyor belt and a discharging conveyor belt, and the back of the floor is grooved; the wire connection work can also be carried out with double-end milling equipment, and the wire connection process flow is as follows: the floor to be processed is subjected to long-side processing through a double-end milling machine No. 1, is transmitted to a floor back grooving device through a transmission device to carry out back grooving, and is transmitted to a machine No. 2 to carry out floor short-side processing, so that the whole floor grooving processing is completed.

While the foregoing embodiments have been described in detail and with reference to the present invention, it will be apparent to one skilled in the art that modifications and improvements can be made based on the disclosure without departing from the spirit and scope of the invention.

Claims (6)

1. A floor back grooving apparatus, the grooving apparatus comprising:

a base (1);

the grooving main cutter shaft mechanism (2), the grooving main cutter shaft mechanism (2) comprises a main shaft cutting motor (21), a servo jumping motor (22), an eccentric shaft rocker mechanism, a main shaft mounting rocker bracket (23) and a saw blade cutter group (24), the main shaft mounting rocker bracket (23) is hinged on the base (1), the saw blade cutter group (24) comprises a main shaft, one side of the main shaft penetrating through the main shaft mounting rocker bracket (23) is in driving connection with the main shaft cutting motor (21) through a universal coupling (25), the other side of the main shaft mounting rocker bracket (23) is connected with one end of a rocker (26) in the eccentric shaft rocker mechanism, the other end of the rocker (26) is hinged with an eccentric shaft (27) in the eccentric shaft rocker mechanism, and the eccentric shaft (27) is in driving connection with the servo jumping motor (22);

the adjustable high-pressure plate mechanism (3), the adjustable high-pressure plate mechanism (3) is arranged below the saw blade knife set (24), the adjustable high-pressure plate mechanism (3) comprises a pressure plate for pressing the first surface of the floor board, and the lower part of the pressure plate is fixedly connected with a screw rod sliding block mechanism;

the flexible carrier roller device (4), the flexible carrier roller device (4) is arranged below the adjustable high-pressure plate mechanism (3) and used for supporting a second surface of the floor board, the flexible carrier roller device (4) comprises a first roller (41), a second roller (42) and a first cylinder (43), the first roller (41) is positioned under the saw blade knife tackle (24) and used as a lower support of a cutting position, two ends of the first roller (41) are respectively connected with a moving part of the first cylinder (43), a cylinder body of the first cylinder (43) is fixed on the base (1), the second roller (42) is fixed on the base (1), and the second roller (42) is distributed on two sides of the first roller (41); and

the roller transmission mechanisms (5) are two groups, the two groups of roller transmission mechanisms (5) are respectively arranged on the front side and the rear side of the slotting main cutter shaft mechanism (2), each roller transmission mechanism (5) comprises an upper roller assembly (51) and a lower roller assembly (52), and a gap for a floor board to pass through is reserved between the upper roller assembly (51) and the lower roller assembly (52).

2. The floor back grooving apparatus according to claim 1, characterized in that the screw slider mechanism comprises two worm screw lifters (31), lifting portions of the two worm screw lifters (31) are fixedly connected with the pressing plate, and the worm screw lifters (31) share one driving shaft (32).

3. Floor back grooving apparatus according to claim 1, characterized in that the material of the first roller (41) is steel.

4. Floor back grooving apparatus according to claim 1, characterized in that the roller transmission (5) comprises an upper roller height adjusting device comprising a wedge slider (531) carrying a third roller in the upper roller assembly, a first screw (532) capable of moving the wedge slider (531).

5. The floor back grooving apparatus according to claim 1, characterized in that the grooving apparatus further comprises a feed protection height limiting device (6), the feed protection height limiting device (6) being arranged at an inlet of one end of the roller transmission (5) for feeding.

6. The floor back grooving apparatus according to claim 1, characterized in that the grooving apparatus further comprises a dust suction hood (7), the dust suction hood (7) being covered over the saw blade set (24), the dust suction hood (7) being in communication with the dust suction apparatus.

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