Disclosure of Invention
The invention aims to provide fan shaft assembly equipment for solving the problems in the background art.
In order to achieve the above object, the present invention provides the following technical solutions:
A fan shaft assembly device comprises a machine case, and a shaft feeding mechanism, a shell pressing mechanism, a flatness detection mechanism and a blanking conveying belt mechanism which are sequentially arranged on the machine case from left to right; the shell feeding mechanism is arranged on the chassis and positioned at the rear side of the shell pressing mechanism; the device also comprises a conveying mechanism which is arranged on the chassis and positioned at the front sides of the shaft feeding mechanism, the shell pressing mechanism, the flatness detecting mechanism and the blanking conveying mechanism;
The shaft feeding mechanism comprises a shaft guide feeding device, a CCD photographing detection device and a shaft transfer placing seat;
The shell pressing mechanism comprises an assembly supporting device arranged on the case and a pressing device arranged above the assembly supporting device;
the shell feeding mechanism is used for feeding the shell to the assembly supporting device;
The flatness detection mechanism comprises a rotary supporting device, side GT sensor assemblies positioned at the left side and the right side of the rotary supporting device, an upper GT sensor assembly positioned above the rotary supporting device and a belt pulley rotary driving assembly positioned at the rear side of the rotary supporting device; the belt pulley rotary driving assembly is used for driving the product placed on the rotary supporting device to rotate;
the starting ends of the shaft transfer placing seat, the assembly supporting device, the rotary supporting device and the blanking conveying belt mechanism are positioned in the same transverse direction;
The conveying mechanism comprises an XYZ three-axis driving module, a first mounting plate arranged at the power output end of the XYZ three-axis driving module, and a first shaft body conveying clamping device, a second shaft body conveying clamping device, a first shell conveying clamping device and a second shell conveying clamping device which are arranged on the first mounting plate from left to right; the first shaft body conveying and clamping device is provided with a rotary cylinder.
Further describing the invention, the shaft pilot feed device comprises a first mounting frame, a storage bin, a feed assembly, a pilot feed box and a receiving assembly; the upper end of the first mounting frame is provided with a top plate, and the lower end of the first mounting frame is provided with a bottom plate; a cushion block is arranged on the top plate; a chute is arranged in the cushion block; the bin is fixed above the cushion block; the bottom surface of the storage bin is an inclined surface; the feeding assembly comprises a first cylinder and a feeding plate; the feeding plate is connected in the chute in a left-right sliding manner and can extend out of the left side of the cushion block; the feeding plate is provided with a receiving hole which is in butt joint with a discharge hole of the stock bin; the first air cylinder is fixed on the first mounting frame, and the power output end of the first air cylinder is connected with the feeding plate; a blanking hole is formed in the left side of the top plate, corresponding to the bin; the guide material box is fixed at the bottom of the top plate and is positioned below the blanking hole; a vertical guide groove is arranged in the guide material box; the material receiving assembly comprises a first bracket, a second cylinder and a material receiving seat; the first bracket is arranged on the bottom plate of the first installation frame; the second cylinder is arranged on the first bracket, and the power output end of the second cylinder is connected with the material receiving seat and used for driving the material receiving seat to move left and right; the material receiving seat is butted under the vertical guide groove when moving to the right side; the CCD photographing detection device is arranged on the chassis and corresponds to the rear part of the receiving seat when the receiving seat moves to the left side; the shaft transfer placing seat is arranged on the chassis and is positioned on the right side of the shaft guide feeding device.
Further describing the invention, the assembly support device comprises a mounting seat, a shaft positioning seat, a shaft limiting rod, a shell support seat, an elastic piece and two limiting plates; the mounting seat is fixed on the chassis; the shaft positioning seat is fixed on the mounting seat; the upper part of the shaft positioning seat is provided with a shaft positioning hole, and the lower part of the shaft positioning seat is provided with a first mounting hole communicated with the shaft positioning hole; the shaft limiting rod is connected in the first mounting hole from the bottom of the shaft positioning seat through threads; the two limiting plates are arranged on the mounting seat and positioned at the left side and the right side of the shaft positioning seat; an upper limit baffle plate horizontally extending towards one side of the shaft positioning seat is arranged at the upper end of the limit plate; a limiting ring is arranged on the outer side of the shell supporting seat; a clearance hole into which the shaft extends is formed in the central position of the upper end of the shell supporting seat, and a second mounting hole is formed in the lower portion of the shell supporting seat; the second mounting hole is sleeved at the upper end of the shaft positioning seat; the elastic piece is arranged at the upper part in the second mounting hole; the lower end of the elastic piece is propped against the upper end of the shaft positioning seat; the limiting ring is located below the limiting baffle and is limited through the limiting baffle.
Further describing the invention, the pressing device comprises a second mounting frame, a lifting driving device, a movable plate and a pressing block; the movable plate can be movably arranged above the mounting seat up and down through a guide rod; the pressing block is fixed at the bottom of the movable plate; the lifting driving device is arranged above the movable plate through a second mounting frame, and the power output end of the lifting driving device is connected with the movable plate; two lower limit rods distributed left and right are arranged on the mounting seat; two upper limit rods corresponding to the lower limit rods in position are arranged at the bottom of the movable plate.
Further describing the invention, the housing loading mechanism comprises a vibrating tray, a housing transverse conveyor belt device, a housing longitudinal feeding rail and a housing handling assembly; the vibration disc is arranged on the left side of the chassis, and the discharge port is arranged backwards; the shell transverse conveying belt device is arranged at the rear part of the chassis; a material outlet which is in butt joint with a material outlet of the vibration disc is arranged at the left front part of the shell transverse conveying belt device, and a material outlet is arranged at the right front part of the shell transverse conveying belt device; the shell longitudinal feeding rail is arranged on the chassis and is butted at the front side of the discharge hole; the shell carrying assembly is erected above the chassis and comprises a second mounting plate, a first Z-direction driving cylinder, a third mounting plate, a sliding block, a sliding rail, a first Y-direction driving cylinder and a shell clamping cylinder; the first Z-direction driving cylinder is arranged on the second mounting plate, and the power output end is connected with the third mounting plate; the sliding block is fixed at the bottom of the third mounting plate; the sliding rail is connected below the sliding block in a sliding way; the first Y-direction driving cylinder is fixed on one side of the third mounting plate, and the power output end is connected with the sliding rail; the shell clamping cylinder is fixed at the bottom of the front end of the sliding rail through a first connecting plate.
Further describing the invention, the rotary support device comprises a base body and a three-jaw cylinder; the base body is fixed on the case; the three-jaw cylinder is fixed above the seat body; a support column is arranged in the middle of the upper part of the three-jaw cylinder; and a plurality of bearings which are stacked up and down are respectively arranged on one side of the three claws of the three-claw cylinder, which is opposite to each other.
Further describing the invention, the lateral GT sensor assembly is disposed on the right side of the rotary support device, and includes a second bracket, a third cylinder, and a first GT sensor; the second bracket is fixed on the chassis; the third cylinder is fixed on the second bracket, and the power output end of the third cylinder is connected with the first GT sensor and used for controlling the first GT sensor to move left and right.
Further describing the invention, the pulley rotary driving assembly comprises a vertical frame, a fourth cylinder, a second connecting plate, a rotary driving device, a driving wheel, a driven wheel and a transmission belt; the stand is fixed on the case; the fourth cylinder is arranged in the middle of the vertical frame, and the power output end of the fourth cylinder is connected with the second connecting plate and used for driving the second connecting plate to move back and forth; the rotary driving device is arranged at the bottom of the second connecting plate, and the power output end is connected with the driving wheel; the driving wheel is positioned above the second connecting plate; the driven wheels are arranged in two and are respectively connected to the second connecting plate in a rotating way; the two driven wheels are arranged at the front side of the driving wheel in a left-right distribution manner; the transmission belt is wound between the driving wheel and the two driven wheels; the upper GT sensor assembly includes a fifth cylinder and a second GT sensor; the fifth cylinder is fixed on the upper part of the vertical frame, and the power output end of the fifth cylinder is connected with the second GT sensor and used for controlling the second GT sensor to move up and down.
Further describing the invention, the XYZ three-axis driving module comprises a base, a lifting plate, a second Z-direction driving cylinder, an X-direction sliding plate, an X-direction driving cylinder and a second Y-direction driving cylinder; the base is fixed on the chassis; the lifting plate is connected above the base in a sliding manner through the guide post; the second Z-direction driving cylinder is arranged on the base, and the power output end of the second Z-direction driving cylinder is connected with the lifting plate; the X-direction sliding plate is connected above the lifting plate in a left-right sliding manner; the X-direction driving cylinder is arranged on the lifting plate, and the power output end of the X-direction driving cylinder is connected with the X-direction sliding plate; the second Y-direction driving cylinder is arranged on the first mounting plate, and the power output end is connected with the X-direction sliding plate.
The beneficial effects of the invention are as follows:
In the design, the shaft is fed to a vertical state through the shaft guide feeding device, the shaft is photographed and detected through the CCD photographing detection device, the first shaft body conveying clamping device conveyed by the conveying mechanism clamps the shaft on the shaft guide feeding device, the rotating cylinder rotates the materials with opposite directions by 180 degrees to be placed on the shaft transfer placing seat for standby, the second shaft body conveying clamping device conveys the shaft on the shaft placing seat to the assembly supporting device, the shell feeding mechanism places the shell on the assembly supporting device again, then the shell pressing mechanism presses the shell into the shaft to complete the assembly of the shaft, the first shell conveying clamping device conveys the assembled product from the assembly supporting device to the rotating supporting device, the belt pulley rotation driving device is used for controlling the rotation of the product, the lateral GT sensor component and the upper GT sensor component are used for detecting the flatness of the outer wall and the upper surface in the product rotation process, and the second shell conveying clamping device is used for conveying the product to the blanking conveying belt mechanism for conveying after the detection is completed.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
As shown in fig. 1, the fan shaft assembly device comprises a machine case 1, and a shaft feeding mechanism 2, a shell pressing mechanism 3, a flatness detection mechanism 4 and a blanking conveying belt mechanism 5 which are sequentially arranged on the machine case 1 from left to right; the shell feeding mechanism 6 is arranged on the chassis 1 and positioned at the rear side of the shell pressing mechanism 3; the device also comprises a conveying mechanism 7 which is arranged on the chassis 1 and positioned at the front sides of the shaft feeding mechanism 2, the shell pressing mechanism 3, the flatness detecting mechanism 4 and the blanking conveying mechanism;
as shown in fig. 2-3, the shaft feeding mechanism 2 comprises a shaft guide feeding device 21, a CCD photographing detection device 22 and a shaft transfer placing seat 23;
The shaft guide feeding device 21 comprises a first mounting frame 211, a storage bin 212, a feeding assembly 213, a guide material box 214 and a material receiving assembly 215; the upper end of the first mounting frame 211 is provided with a top plate 2111, and the lower end is provided with a bottom plate 2112; a cushion block 2113 is arranged on the top plate 2111; a chute is arranged in the cushion 2113; the bin 212 is fixed above the cushion 2113; the bottom surface of the bin 212 is an inclined surface; the feed assembly 213 includes a first cylinder 2131 and a feed plate 2132; the feeding plate 2132 is connected in the chute in a left-right sliding way and can extend out of the left side of the cushion 2113; The feeding plate 2132 is provided with a receiving hole 2132-1 which is in butt joint with a discharge hole of the storage bin 212; the first cylinder 2131 is fixed on the first mounting frame 211 and the power output end thereof is connected with the feeding plate 2132; a blanking hole 2111-1 is formed in the top plate 2111 corresponding to the left side of the bin 212; the guide box 214 is fixed at the bottom of the top plate 2111 and is positioned below the blanking hole 2111-1; a vertical guide groove 2141 is arranged in the guide material box 214; the receiving assembly 215 includes a first bracket 2151, a second cylinder 2152, and a receiving seat 2153; The first bracket 2151 is mounted on the bottom plate 2112 of the first mounting bracket 211; the second cylinder 2152 is mounted on the first bracket 2151, and the power output end is connected to the receiving seat 2153, for driving the receiving seat 2153 to move left and right; the material receiving seat 2153 is abutted under the vertical guide groove 2141 when moving to the right; the CCD photographing detection device 22 is installed on the case 1 and corresponds to the rear part when the receiving seat 2153 moves to the left; The shaft transfer placing seat 23 is installed on the chassis 1 and is positioned on the right side of the shaft guide feeding device 21, the shaft component is poured into the bin 212, the shaft falls from the discharge hole at the bottom of the bin 212, the feeding assembly is used for receiving materials at the bottom of the bin 212 one by one, the shaft falling from the bin 212 is in a horizontal state, when the first cylinder 2131 drives the feeding plate 2132 to move to the right, the material receiving hole on the feeding plate 2132 is in butt joint with the discharge hole of the bin 212, one shaft component falls into the material receiving hole, then the first cylinder 2131 controls the feeding plate 2132 to move to the left, the shaft component is in butt joint with the blanking hole 2111-1, Falling down from the blanking hole 2111-1 into the guide box 214, guiding by the vertical guide groove 2141 in the guide box 214, gradually reducing the width of the vertical guide groove 2141 from top to bottom, and the bottom being an output port for vertical output of the shaft, so when the horizontal shaft is sent down through the vertical guide groove 2141, the guide is in a vertical state, after falling down, the receiving seat 2153 receives the shaft in the vertical state, then the second cylinder 2152 drives the receiving seat 2153 to move to the left, the CCD photographing detection device 22 detects whether the shaft is correct, if the direction is correct, the shaft is directly conveyed to the shaft transferring and placing seat 23 through the conveying mechanism 7, If the direction is incorrect, the conveying mechanism 7 takes the shaft, turns the shaft over and then places the shaft on the transfer placing seat for standby.
As shown in fig. 4-5, the housing pressing mechanism 3 includes an assembly supporting device 31 mounted on the chassis 1 and a pressing device 32 disposed above the assembly supporting device 31;
The assembly supporting device 31 comprises a mounting seat 311, a shaft positioning seat 312, a shaft limiting rod 313, a shell supporting seat 314, an elastic piece 315 and two limiting plates 316; the mounting seat 311 is fixed on the chassis 1; the shaft positioning seat 312 is fixed on the mounting seat 311; the upper part of the shaft positioning seat 312 is provided with a shaft positioning hole 3121, and the lower part is provided with a first mounting hole 3122 communicated with the shaft positioning hole 3121; the shaft limiting rod 313 is connected in the first mounting hole 3122 from the bottom of the shaft positioning seat 312 through threads; the two limiting plates 316 are mounted on the mounting seat 311 and positioned on the left and right sides of the shaft positioning seat 312; an upper limit baffle 3161 horizontally extending towards one side of the shaft positioning seat 312 is arranged at the upper end of the limit plate 316; a limiting ring 3141 is arranged on the outer side of the shell supporting seat 314; a clearance hole 3142 into which the shaft extends is formed in the central position of the upper end of the housing support 314, and a second mounting hole is formed in the lower portion of the housing support; the second mounting hole is sleeved at the upper end of the shaft positioning seat 312; the elastic member 315 is installed at an upper portion in the second installation hole; the lower end of the elastic member 315 is propped against the upper end of the shaft positioning seat 312; the spacing ring 3141 is located limit baffle 3161 below, it is spacing through limit baffle 3161, the axle is put into in the axle locating hole 3121 and is supported spacing through axle gag lever post 313, can restrict the height of placing of axle through the high position of adjustment axle gag lever post 313, adapt to the axle assembly of different types of products, elastic component 315 adopts the elastic gum cover, elastic component 315 top touches shell supporting seat 314 and moves to the upper limit position, the shell is placed in shell supporting seat 314 top, when compression fittings 32 work pressfitting shell, elastic component 315 continues to compress, shell supporting seat 314 moves down relative to axle locating seat 312, press the shell into the axle and accomplish the assembly.
The pressing device 32 comprises a second mounting frame 321, a lifting driving device 322, a movable plate 323 and a pressing block 324; the movable plate 323 is movably arranged above the mounting seat 311 up and down through a guide rod 3231; the pressing block 324 is fixed at the bottom of the movable plate 323; the lifting driving device 322 is arranged above the movable plate 323 through a second mounting frame 321, and the power output end of the lifting driving device is connected with the movable plate 323; two lower limit rods 317 distributed left and right are arranged on the mounting seat 311; the bottom of the movable plate 323 is provided with two upper limit rods 3232 corresponding to the positions of the lower limit rods 317, the lower stroke of the movable plate 323 is limited by the arrangement of the upper limit rods 3232 and the lower limit rods 317, and the lifting driving device 322 controls the movable plate 323 to drive the pressing block 324 to move downwards so as to press and assemble the product.
As shown in fig. 6-7, the housing loading mechanism 6 is used for loading the housing onto the assembly supporting device 31;
the shell feeding mechanism 6 comprises a vibrating disc 61, a shell transverse conveying belt device 62, a shell longitudinal feeding rail 63 and a shell carrying assembly 64; the vibration disc 61 is arranged at the left side of the chassis 1, and the discharge port is arranged backwards; the shell transverse conveyor belt device 62 is arranged at the rear part of the chassis 1; a feed port which is in butt joint with a discharge port of the vibration disc 61 is arranged at the left front part of the shell transverse conveying belt device 62, and a discharge port is arranged at the right front part; the shell longitudinal feeding rail 63 is arranged on the case 1 and is butted at the front side of the discharge hole; the housing conveying assembly 64 is erected above the chassis 1 and comprises a second mounting plate 641, a first Z-direction driving cylinder 642, a third mounting plate 643, a sliding block 644, a sliding rail 645, a first Y-direction driving cylinder 646 and a housing clamping cylinder 647; wherein the second mounting plate 641 is fixed to the rear side of the second mounting frame 321; the first Z-direction driving cylinder 642 is mounted on the second mounting plate 641 and the power output end is connected with the third mounting plate 643; the slide 644 is fixed at the bottom of the third mounting plate 643; the sliding rail 645 is slidably connected below the slider 644; the first Y-direction driving cylinder 646 is fixed on one side of the third mounting plate 643, and the power output end is connected with the sliding rail 645; the shell clamping cylinder 647 is fixed at the bottom of the front end of the sliding rail 645 through a first connecting plate 648, the shell is sent out through the vibrating disc 61, then conveyed to the right through the shell transverse conveying belt device 62, conveyed forward through the shell longitudinal conveying rail 63, in the shell longitudinal conveying rail 63, conveyed forward through the extrusion of a rear workpiece, conveyed to the shell supporting seat 314 of the assembly supporting device 31 through the shell conveying assembly 64 when conveyed to the shell longitudinal conveying front end, and the shell conveying assembly 64 controls the shell clamping cylinder 647 to move through the linkage of the first Z-direction driving device and the first Y-direction driving device, and the shell clamping cylinder 647 clamps the shell to convey.
As shown in fig. 8 to 9, the flatness detection mechanism 4 includes a rotation support device 41, side GT sensor assemblies 42 located on the left and right sides of the rotation support device 41, an upper GT sensor assembly 43 located above the rotation support device 41, and a pulley rotation driving assembly 44 located on the rear side of the rotation support device 41; the belt pulley rotation driving assembly 44 is used for driving the product placed on the rotation supporting device 41 to rotate;
The rotary supporting device 41 comprises a base 411 and a three-jaw cylinder 412; the base 411 is fixed on the case 1; the three-jaw cylinder 412 is fixed above the seat 411; a support column 4121 is arranged in the middle part above the three-jaw cylinder 412; the opposite sides of the three claws 4122 of the three-claw cylinder 412 are respectively provided with a plurality of bearings 4122-1 which are stacked up and down, the bearings 4122-1 are connected through a vertically arranged rotating shaft, in the design, each claw 4122 is provided with four bearings 4122-1, the initial state of the three-claw cylinder 412 is in a stretching state, under the stretching state, the shell assembled with the shaft is placed on the claw 4122 of the three-claw cylinder 412, the shell is supported by the three claws 4122 and supports the lower end of the shaft through the supporting column 4121, during detection, the three-claw cylinder 412 is clamped, the bearings 4122-1 on the three claws 4122 are propped against the periphery of the shaft and support the shaft, the pulley rotating driving assembly 44 controls the shell to rotate from the outer side, and the rotating centrality of the product is ensured.
The side GT sensor assembly 42 is disposed on the right side of the rotary support device 41 and includes a second bracket 421, a third cylinder 422, and a first GT sensor 423; the second bracket 421 is fixed on the chassis 1; the third cylinder 422 is fixed on the second bracket 421, and the power output end is connected to the first GT sensor 423, for controlling the first GT sensor 423 to move left and right.
The pulley rotary driving assembly 44 comprises a vertical frame 441, a fourth cylinder 442, a second connecting plate 443, a rotary driving device 444, a driving wheel 445, a driven wheel 446 and a transmission belt 447; the stand 441 is fixed on the case 1; the fourth cylinder 442 is installed in the middle of the vertical frame 441, and the power output end is connected with the second connection plate 443, for driving the second connection plate 443 to move back and forth; the rotary driving device 444 is arranged at the bottom of the second connecting plate 443, and the power output end is connected with the driving wheel 445; the driving wheel 445 is positioned above the second connecting plate 443; the driven wheels 446 are arranged in two and are respectively connected to the second connecting plates 443 in a rotating way; two driven wheels 446 are arranged on the front side of the driving wheel 445 in a left-right distribution manner; the transmission belt 447 is wound between the driving pulley 445 and the two driven pulleys 446; the upper GT sensor assembly 43 includes a fifth cylinder 431 and a second GT sensor 432; the fifth cylinder 431 is fixed on the upper portion of the vertical frame 441, and the power output end is connected with the second GT sensor 432, so as to control the second GT sensor 432 to move up and down, during detection, the third cylinder 422 controls the first GT sensor 423 to move left and contact the side wall of the housing, the fifth cylinder 431 controls the second GT sensor 432 to move down and contact the top of the housing, the fourth cylinder 442 controls the second connection plate 443 to move forward, so that the transmission belt 447 contacts the rear side of the housing, and the rotation driving device 444 works to drive the transmission belt 447 to rotate, thereby driving the housing to realize the detection of the flatness of the housing.
Wherein the starting ends of the shaft rotating and placing seat 23, the assembling supporting device 31, the rotating supporting device 41 and the blanking conveying belt mechanism 5 are positioned in the same transverse direction; and the conveying mechanism 7 is convenient for feeding.
As shown in fig. 10, the conveying mechanism 7 includes an XYZ three-axis driving module 71, a first mounting plate 72 mounted on a power output end of the XYZ three-axis driving module 71, and a first shaft body conveying and clamping device 73, a second shaft body conveying and clamping device 74, a first housing conveying and clamping device 75, and a second housing conveying and clamping device 76 mounted on the first mounting plate 72 from left to right; the first shaft body conveying and clamping device 73 is provided with a rotary cylinder 731.
The XYZ three-axis driving module 71 includes a base 711, a lifting plate 712, a second Z-direction driving cylinder 713, an X-direction sliding plate 714, an X-direction driving cylinder 715, and a second Y-direction driving cylinder 716; the base 711 is fixed on the chassis 1; the lifting plate 712 is slidably connected above the base 711 through a guide post; the second Z-direction driving cylinder 713 is arranged on the base 711, and the power output end is connected with the lifting plate 712; the X-direction sliding plate 714 is slidably connected to the upper side of the lifting plate 712; the X-direction driving cylinder 715 is arranged on the lifting plate 712, and the power output end is connected with the X-direction sliding plate 714; the second Y-direction drive cylinder is mounted on the first mounting plate 72 and the power take off is connected to the X-direction slide plate 714.
The working principle of the embodiment is as follows:
The shaft guide feeding device 21 feeds the shaft to a vertical state, the CCD photographing detection device 22 photographs and detects the shaft, the first shaft body conveying clamping device 73 conveyed by the conveying mechanism 7 clamps the shaft on the shaft guide feeding device 21, the rotating cylinder 731 rotates the materials with opposite directions by 180 degrees, the materials are placed on the shaft transfer placing seat 23 for standby, the second shaft body conveying clamping device 74 conveys the shaft on the shaft placing seat to the assembly supporting device 31, the shell feeding mechanism 6 places the shell on the assembly supporting device 31 again, the shell pressing mechanism 3 presses the shell into the shaft to complete the assembly of the shaft, the first shell conveying clamping device 75 conveys the assembled product from the assembly supporting device 31 to the rotating supporting device 41, the belt pulley rotation driving device controls the rotation of the product, the flatness of the outer wall and the flatness of the upper surface in the product rotation process are detected through the side GT sensor assembly 42 and the upper GT sensor assembly 43, the product is conveyed to the blanking conveying mechanism 5 through the second shell conveying clamping device 76 after the detection is completed, and the shaft flatness detection process of the shaft can be efficiently completed.
The above description should not be taken as limiting the scope of the invention, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical principles of the present invention still fall within the scope of the technical solutions of the present invention.