A kind of elevator production steel plate processing unit (plant)
Technical field
The present invention relates to elevator production technical field more particularly to a kind of elevator production steel plate processing unit (plant)s.
Background technology
Elevator is widely used in various large-scale malls, school, office building or outdoor scape as common running gear up and down
The regions such as point.
When producing elevator, need to use a large amount of steel plate.
For the ease of storing and transporting, steel generally use roller type packaging.Since the area of whole steel plate is larger, in profit
It is processed with steel plate before making parts, also first to carry out blanking, i.e., stick cutting is carried out to steel plate using cutting machine.
The machine of gentle cutting is opened suitable for steel plate at present to be all independently arranged, i.e., by steel plate by opening flat machine after, need
It is transferred to cutting machine with vehicle and boat vehicle lifting, requires to be cut according to size, serious waste manpower and materials, and reduce
Working efficiency.
Invention content
In order to solve technical problem present in background technology, the present invention proposes a kind of elevator production steel plate processing dress
It sets, processing effect is good.
A kind of elevator production steel plate processing unit (plant), including blowing portion, power part, tractive unit and cutting part;
Blowing portion, power part and tractive unit are sequentially arranged, and blowing portion includes holder, shaft, emptying roller, first gear, silk
Bar;Shaft is horizontally disposed, and shaft is rotatably installed on holder;Emptying roller, first gear are mounted in shaft;Lead screw is along vertical side
To arrangement, lead screw is rotatably installed on holder, and lead screw is placed in the side of first gear, and lead screw is engaged with first gear;
Power part includes mounting base, second gear, the first power unit, and second gear is rotatably installed in mounting base, the
Two gears are equipped with N number of circular arc along its peripheral surface, and N number of circular arc is uniformly distributed about the center line of second gear, wherein N >=2, N
For even number;Second gear is located at the downstream side of lead screw, and second gear is engaged with lead screw;First power unit is for driving the second tooth
Wheel rotation;
Tractive unit includes pedestal, support plate, the first rack, support base, rotation axis, third gear, the 4th gear, the 5th tooth
Wheel, supporting rack, support shaft, the 6th gear, the 7th gear, rotating roller;
Pedestal is equipped with guide rail, and guide rail is horizontally disposed, and the length direction of guide rail is vertical with the length direction of shaft;
Support plate is movably mounted on guide rail;
First rack is installed on the supporting plate, and the length direction of the first rack is parallel with the length direction of guide rail;
Rotation axis arranges that rotation axis is located at the downstream side of second gear vertically, and rotation axis is placed in the side of the first rack, turns
Moving axis is rotatably installed on support base;
Third gear, the 4th gear, the 5th gear are sequentially arranged in rotation axis;Third gear is engaged with second gear;
4th gear is engaged with the first rack;
6th gear is rotatably installed on supporting rack, and the 6th gear is placed in the side of the 5th gear, the 6th gear and the 5th
Gear engages;
Support shaft is placed in the top of support plate, and support shaft is horizontally disposed, the length side of the length direction and guide rail of support shaft
To vertical, support shaft is rotatably installed on supporting rack;
7th gear, rotating roller are installed in support shaft, and the 7th gear is placed in the side of the 6th gear, the 7th gear with
6th gear engages;
Rotating roller is placed in the top of support plate, and feeding passage is formed between rotating roller and support plate;
Cutting part is used for cutting steel plate.
Preferably, the upper surface of support plate is equipped with multiple grooves, and multiple grooves are uniformly distributed along the length direction of guide rail, recessed
The length direction of slot is vertical with the length direction of guide rail;
Cutting part is placed in the top of support plate, and cutting part includes cross bar, movable block, the first driving unit, the second driving list
Member, third driving unit, blade;Each ingredient and weight percent of blade be:C:2.1-2.15%, Cr:20.0—
21.6%, Si:1.0-1.1%, Mn:0.8-0.9%, B:0.1-0.2%, Re:0.08-0.1%;Surplus is Fe and can not
The impurity avoided;The other elements of C cooperate, and improve quenching degree, wearability.Strengthen tissue using Si, improves intensity, wear-resisting
Property, the crystal grain thinnings such as B, Re, wearability, intensity;The blade wearability obtained by said components is good, high strength, service life
It is long.
The length direction of cross bar is vertical with the length direction of guide rail;
Movable block is movably mounted on cross bar;
First driving unit is for driving movable block to be moved along the length direction of cross bar;
Second driving unit is mounted on movable block, and the second driving unit is for driving third driving unit vertically
It is mobile;
For third driving unit for driving blade rotation, the plane where blade is vertical with the length direction of guide rail.
Preferably, further include assisted parts, assisted parts includes slide bar, the second power unit, two rotating bars, and slide bar is placed in branch
The side of cross bar is placed in above fagging, slide bar is horizontally disposed;
Second power unit is vertically moved for driving slider;
Two rotating bars are respectively placed in the both sides of blade, and rotating bar is horizontally disposed, and the first end of rotating bar is connect with slide bar,
The second end of rotating bar is free end.
Preferably, the length direction of rotating bar and the length direction of guide rail are vertical;
Assisted parts further includes double-head cylinder, two sliding blocks;Two sliding blocks are movably mounted on slide bar, two rotations
The first end of bar is rotatablely connected with two sliding blocks respectively, and rotating bar is connect by sliding block with slide bar;
Double-head cylinder is mounted on slide bar, and the both ends of double-head cylinder are connect with two rotating bars respectively.
Preferably, assisted parts further includes the second rack, two axle sleeves, two driven gears;
Two axle sleeves are rotatably installed in respectively in two rotating bars;
The both ends of double-head cylinder are connect with two axle sleeves respectively, and double-head cylinder is connect by axle sleeve with rotating bar;
Two driven gears are separately mounted in two rotating bars;
Second rack is mounted on slide bar, and the length direction of the second rack is parallel with the length direction of guide rail, the second rack
It is placed in the top of driven gear, the second rack is engaged with driven gear.
Preferably, further include cooling portion, cooling portion includes outlet tube, tracheae, air pump, babinet, hydraulic pump, connecting tube;
Outlet tube is mounted on movable block, and the liquid outlet of outlet tube is towards insert orientation;
Air pump is connect by tracheae with outlet tube;
Hydraulic pump is connect with babinet, the connection that hydraulic pump passes through connecting tube and tracheae.
Preferably, the inner circumferential surface of tracheae is equipped with the groove of spiral distribution, length direction point of the groove along tracheae
Cloth.
Preferably, further include leveling portion, leveling portion is between emptying roller and rotating roller;
Leveling portion includes the first leveling group and the second leveling group, and the first leveling group includes multiple first screed units;Second
Leveling group includes multiple second screed units;
Multiple first screed units, multiple second screed units are sequentially arranged from emptying roller to rotating roller direction, multiple
First screed units and multiple second screed units arranged for interval;
First screed units include the first strut, the first compression bar, and the first end of the first compression bar is mounted on the first strut, the
The second end of one compression bar is free end, and the first compression bar is horizontally disposed, and the length direction of the first compression bar and the length direction of guide rail hang down
Directly;
Second screed units include the second strut, the second compression bar, and the first end of the second compression bar is mounted on the second strut, the
The second end of two compression bars is free end, and the second compression bar is horizontally disposed, and the length direction of the second compression bar and the length direction of guide rail hang down
Directly;Spacing between second compression bar and the first compression bar and horizontal plane differs.
Preferably, the quantity of the first compression bar is two, and two the first compression bars are sequentially arranged from top to bottom, two the first compression bars
Between form first and wear and send channel;
The quantity of second compression bar is two, and two the second compression bars are sequentially arranged from top to bottom, shape between two the second compression bars
It is worn at second and send channel.
Preferably, the first end of the first compression bar is rotatablely connected with the first strut;The first end of second compression bar and the second strut
Rotation connection.
In the present invention, steel plate is after the completion of production, for the ease of transporting, storing, typically utilizes the windings such as emptying roller
Get up.
It drives second gear to rotate using the first power unit, emptying roller is driven by lead screw, first gear, shaft
Blowing is carried out, steel plate is released from emptying roller;Steel plate is wrapped on emptying roller and can bend for a long time, needs whole
It is flat.
By the way that leveling portion is arranged, by the way that multiple first screed units, multiple second screed units are arranged, allow steel plate from first
It wears and channel, second is sent to wear to send in channel and pass through, multiple inverse bending is carried out to steel plate using the first compression bar, the second compression bar, to steel
Plate is flattened, and ensure that cutting accuracy.
Two the first compression bars are arranged in each first screed units, two the second compression bars, energy is arranged in each second screed units
It is enough that effectively steel plate is pressed, is positioned, ensure bending effect, avoids Plate transferring deviation.
Second gear is engaged with third gear, and then drives rotation axis rotation, utilizes the 4th gear, the first rack drives branch
Fagging moves;It drives rotating roller to rotate using the 5th gear, the 6th gear, the 7th gear, support shaft, utilizes rotating roller and support
Plate, which matches, drives steel plate movement.
In Fig. 1, if vertical view, rotation axis rotates clockwise;In terms of right side, the 6th gear rotates counterclockwise;If main view,
7th gear rotates counterclockwise, and then rotating roller is driven to rotate counterclockwise, in order to which support plate coordinates.
Since second gear is equipped with N number of circular arc, the gear teeth in second gear are detached with lead screw, third gear or together simultaneously
When contact, lead screw, third gear are rotated or are simultaneously stopped simultaneously;When lead screw, third gear are simultaneously stopped, emptying roller stopping is put
Material, support plate, rotating roller stop operation.A peripheral surface part for second gear has the gear teeth, a part there are not the gear teeth.
When support plate stops, cutting part cutting steel plate is utilized.
When support plate stops, just what a groove is located in the plane where blade.
In order to avoid steel plate moves when cutting, cutting accuracy is further increased, assisted parts is increased.
Before being cut, it is moved down using the second power unit band moving slide-bar, presses steel plate using two rotating bars, effectively
It avoids steel plate from moving, ensures machining accuracy.
After rotating bar and steel plate contact, two rotating bars are driven to move round about using double-head cylinder.Fig. 1
In, the rotating bar on the left of blade is moved to the left, and the rotating bar positioned at right side moves right.
Due to double-head cylinder be connect with rotating bar by axle sleeve, be respectively mounted driven gear in each rotating bar, and from
Moving gear is engaged with the second rack, and therefore, rotating bar can also rotate when moving.
Again since the second rack is the top for being located at driven gear, the rotating bar on the left of blade turns clockwise
It is dynamic, frictional force to the left is applied to steel plate;Rotating bar on the right side of blade rotates counterclockwise, and applies friction to the right to steel plate
Power;And then opposite effect power is applied to steel plate twice from blade, and then effectively tighten steel plate, so that blade is cut
It cuts, improves cutting accuracy, also improve cutting efficiency.
Blade rotation is driven using third driving unit;Using the second driving unit drive third driving unit, blade to
Lower movement, cuts steel plate;Movable block is driven to move using the first driving unit, along the direction cutting of steel perpendicular to guide rail
Plate.
In cutting, in order to avoid blade overheats, cooling portion is increased, the service life of blade is improved.
Using air pump, tracheae, high pressure gas is passed through into outlet tube, cooling liquid is put in memory box, using hydraulic pump,
Connecting tube is passed through cooling liquid to tracheal strips, and then is discharged by outlet tube.
Liquid is driven to flow using high pressure gas, faster, gas can be carried out effectively with liquid and mixes speed, injection effect
Fruit is more preferable, can effectively cool down to blade.
After the completion of primary cutting, the gear teeth in second gear are engaged with lead screw, third gear again, and then drive blowing
Roller, support plate, rotating roller carry out operation, carry out next circulation.
The configuration of the present invention is simple can effectively flatten steel plate, be cut, and continuous iterative cycles can be continuous
Steel plate is cut, each component cooperates, and emptying roller, second gear, support plate, rotating roller are effectively contacted one
It rises, matches and carry out operation, mutually coordinated operation, reduce manual operation, avoid the interference of human factor, effectively raise and add
Work precision, effect is good, efficient.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutual combination;Below with reference to the accompanying drawings it and in conjunction with the embodiments elaborates to the present invention.
Referring to Fig.1:
A kind of elevator production steel plate processing unit (plant), including blowing portion, power part, tractive unit, cutting proposed by the present invention
Portion, assisted parts, cooling portion and leveling portion.
Blowing portion, power part and tractive unit are sequentially arranged, and blowing portion includes holder 1, shaft 2, emptying roller 3, first gear
4, lead screw 5;Shaft 2 is horizontally disposed, and shaft 2 is rotatably installed on holder 1;Emptying roller 3, first gear 4 are mounted in shaft 2;
Lead screw 5 is arranged in a vertical direction, and lead screw 5 is rotatably installed on holder 1, and lead screw 5 is placed in the side of first gear 4, lead screw 5 and
One gear 4 engages.Steel plate can be generally wrapped on emptying roller 3;It drives emptying roller 3 to rotate using lead screw 5, first gear 4, carries out
Blowing.
Power part includes mounting base 6, second gear 7, the first power unit 8, and second gear 7 is rotatably installed in mounting base 6
On, second gear 7 is equipped with N number of circular arc along its peripheral surface, and N number of circular arc is uniformly distributed about the center line of second gear 7,
In, N >=2, N are even number;Second gear 7 is located at the downstream side of lead screw 5, and second gear 7 is engaged with lead screw 5;First power unit 8
For driving second gear 7 to rotate;First power unit 8 can be motor.
Tractive unit includes pedestal 9, support plate 10, the first rack 11, support base 12, rotation axis 13, third gear the 14, the 4th
Gear 15, the 5th gear 16, supporting rack 17, support shaft 18, the 6th gear 19, the 7th gear 20, rotating roller 21.
Pedestal 9 is equipped with guide rail, and guide rail is horizontally disposed, and the length direction of guide rail is vertical with the length direction of shaft 2.
Support plate 10 is movably mounted on guide rail;Support plate 10 can be moved along the length direction of guide rail.
First rack 11 is mounted in support plate 10, and the length direction of the first rack 11 is parallel with the length direction of guide rail.
Rotation axis 13 arranges that rotation axis 13 is located at the downstream side of second gear 7, and rotation axis 13 is placed in the first rack 11 vertically
Side, rotation axis 13 is rotatably installed on support base 12.
Third gear 14, the 4th gear 15, the 5th gear 16 are sequentially arranged in rotation axis 13;Third gear 14 and second
Gear 7 engages, the gear teeth in second gear 7 engaged simultaneously with lead screw 5 and the third gear teeth 14 or simultaneously with lead screw 5 and the third gear teeth
14 separation;4th gear 15 is engaged with the first rack 11;When 4th gear 15 rotates, the movement of the first rack 11, and then band are driven
Dynamic support plate 10 moves.
6th gear 19 is rotatably installed on supporting rack 17, and the 6th gear 19 is placed in the side of the 5th gear 16, the 6th tooth
Wheel 19 is engaged with the 5th gear 16.
Support shaft 18 is placed in the top of support plate 10, and support shaft 18 is horizontally disposed, the length direction and guide rail of support shaft 18
Length direction it is vertical, support shaft 18 is rotatably installed on supporting rack 17.
7th gear 20, rotating roller 21 are installed in support shaft 18, and the 7th gear 20 is placed in the side of the 6th gear 19,
7th gear 20 is engaged with the 6th gear 19.
Rotating roller 21 is placed in the top of support plate 10, and feeding passage is formed between rotating roller 21 and support plate 10.
Cutting part is used for cutting steel plate.
In the present embodiment, the upper surface of support plate 10 is equipped with multiple grooves 22, length direction of the multiple grooves 22 along guide rail
It is uniformly distributed, the length direction of groove 22 is vertical with the length direction of guide rail;Avoid damage to support plate 10.
Cutting part is placed in the top of support plate 10, and cutting part includes cross bar 23, movable block 24, the first driving unit, second
Driving unit 25, third driving unit 26, blade 27.Each ingredient and weight percent of blade be:C:2.12%, Cr:
20.4%, Si:1.05%, Mn:0.86%, B:0.15%, Re:0.09%.
The length direction of cross bar 23 is vertical with the length direction of guide rail.
Movable block 24 is movably mounted on cross bar 23;First driving unit is for driving movable block 24 along the length of cross bar 23
Spend direction movement;First driving unit can be telescoping cylinder.
Second driving unit 25 is mounted on movable block 24, and the second driving unit 25 is for driving 26 edge of third driving unit
Vertical direction moves;Second driving unit 25 can be telescoping cylinder.
For driving blade 27 to rotate, the length direction of plane and guide rail where blade 27 hangs down third driving unit 26
Directly;Third driving unit 26 can be motor.
In the present embodiment, assisted parts include slide bar 28,29, two rotating bars 30 of the second power unit, double-head cylinder 31,
Two sliding blocks, 32, two axle sleeves of the second rack, two driven gears 33, the top that slide bar 28 is placed in support plate 10 is placed in cross
The side of bar 23, slide bar 28 are horizontally disposed;Second power unit 29 is vertically moved for driving slider 28;Second power
Unit 29 can be telescoping cylinder.
The length direction of rotating bar 30 is vertical with the length direction of guide rail.
Two rotating bars 30 are respectively placed in the both sides of blade 27, and rotating bar 30 is horizontally disposed, the removable peace of two sliding blocks
On slide bar 28, the first end of two rotating bars 30 is rotatablely connected with two sliding blocks respectively, and the second end of rotating bar 30 is certainly
By holding;Rotating bar 30 is connect by sliding block with slide bar 28.
Two axle sleeves are rotatably installed in respectively in two rotating bars 30;Double-head cylinder 31 is mounted on slide bar 28, double end
The both ends of hydraulic cylinder 31 are connect with two axle sleeves respectively, and double-head cylinder 31 is connect by axle sleeve with rotating bar 30.
Two driven gears 33 are separately mounted in two rotating bars 30.
Second rack 32 is mounted on slide bar 28, and the length direction of the second rack 32 is parallel with the length direction of guide rail, the
Two racks 32 are placed in the top of driven gear 33, and the second rack 32 is engaged with driven gear 33.It is driven using double-head cylinder 31
The movement of rotating bar 30, rotation.
In the present embodiment, cooling portion includes outlet tube 34, tracheae 35, air pump 36, babinet 37, hydraulic pump 38, connecting tube 39.
Outlet tube 34 is mounted on movable block 24, and the liquid outlet of outlet tube 34 is towards 27 direction of blade;Air pump 36 passes through gas
Pipe 35 is connect with outlet tube 34;Hydraulic pump 38 is connect with babinet 37, the connection that hydraulic pump 38 passes through connecting tube 39 and tracheae 35.
Further, the inner circumferential surface of tracheae 35 is equipped with the groove of spiral distribution, and groove is along the length side of tracheae 35
To distribution;The spiral movement of mixed airflow, raising mixed effect is allowed to improve jet velocity, improve jeting effect, improve cooling
Effect.
In the present embodiment, leveling portion is between emptying roller 3 and rotating roller 21.
Leveling portion includes the first leveling group and the second leveling group, and the first leveling group includes multiple first screed units;Second
Leveling group includes multiple second screed units;
Multiple first screed units, multiple second screed units are sequentially arranged from emptying roller 3 to 21 direction of rotating roller, more
A first screed units and multiple second screed units arranged for interval;
First screed units include 40, two the first compression bars 41 of the first strut, and the first end of the first compression bar 41 is mounted on the
On one strut 40, the second end of the first compression bar 41 is free end, and the first compression bar 41 is horizontally disposed, the length direction of the first compression bar 41
It is vertical with the length direction of guide rail;
Second screed units include 42, two the second compression bars 43 of the second strut, and the first end of the second compression bar 43 is mounted on the
On two struts 42, the second end of the second compression bar 43 is free end, and the second compression bar 43 is horizontally disposed, the length direction of the second compression bar 43
It is vertical with the length direction of guide rail;Spacing between second compression bar 43 and the first compression bar 41 and horizontal plane differs.
Two the first compression bars 41 are sequentially arranged from top to bottom, and formation first, which is worn, between two the first compression bars 41 send channel;Two
A second compression bar 43 is sequentially arranged from top to bottom, and formation second, which is worn, between two the second compression bars 43 send channel.
Further, the first end of the first compression bar 41 is rotatablely connected with the first strut 40;The first end of second compression bar 43 with
Second strut 42 is rotatablely connected;Reduce the frictional force to steel plate.
Steel plate is after the completion of production, for the ease of transporting, storing, is typically wound up using emptying roller 3 etc..
It drives second gear 7 to rotate using the first power unit 8, is driven by lead screw 5, first gear 4, shaft 2
Emptying roller 3 carries out blowing, and steel plate is released from emptying roller 3.
By the way that leveling portion is arranged, by the way that multiple first screed units, multiple second screed units are arranged, allow steel plate from first
It wears and channel, second is sent to wear to send in channel and pass through, multiple inverse bending is carried out to steel plate using the first compression bar 41, the second compression bar 43,
Steel plate is flattened, ensure that cutting accuracy.
Two the first compression bars 41 are arranged in each first screed units, two the second compression bars are arranged in each second screed units
43, effectively steel plate can be pressed, positioned, ensure bending effect, avoid Plate transferring deviation.
Second gear 7 is engaged with third gear 14, and then rotation axis 13 is driven to rotate, and utilizes the 4th gear 15, the first tooth
Item 11 drives support plate 10 to move;Rotating roller is driven using the 5th gear 16, the 6th gear 19, the 7th gear 20, support shaft 18
21 rotations are matched with support plate 10 using rotating roller 21 and drive steel plate movement.
In Fig. 1, if vertical view, rotation axis 13 rotates clockwise;In terms of right side, the 6th gear 19 rotates counterclockwise;Main view
If, the 7th gear 20 rotates counterclockwise, and then rotating roller 21 is driven to rotate counterclockwise, in order to which support plate 10 coordinates.
Since second gear is equipped with N number of circular arc, the gear teeth in second gear are detached with lead screw, third gear or together simultaneously
When contact, lead screw, third gear are rotated or are simultaneously stopped simultaneously;When lead screw, third gear are simultaneously stopped, emptying roller stopping is put
Material, support plate, rotating roller stop operation.
When support plate 10 stops, cutting part cutting steel plate is utilized.
When support plate 10 stops, just what a groove 22 is located in the plane at 27 place of blade.
In order to avoid steel plate moves when cutting, cutting accuracy is further increased, assisted parts is increased.
Before being cut, it is moved down with moving slide-bar 28 using the second power unit 29, steel plate is pressed using two rotating bars 30,
Effectively steel plate is avoided to move, ensures machining accuracy.
After rotating bar 30 and steel plate contact, two rotating bars 30 are driven to move round about using double-head cylinder 31
It is dynamic.In Fig. 1, the rotating bar 30 positioned at 27 left side of blade is moved to the left, and the rotating bar 30 positioned at right side moves right.
Since double-head cylinder 31 is to be connect with rotating bar 30 by axle sleeve, be respectively mounted driven gear in each rotating bar 30
33, and driven gear 33 is engaged with the second rack 32, therefore, rotating bar 30 can also rotate when moving.
Again since the second rack 32 is the top for being located at driven gear 33, it is located at the rotating bar 30 in 27 left side of blade
It rotates clockwise, frictional force to the left is applied to steel plate;Rotating bar 30 positioned at 27 right side of blade rotates counterclockwise, and is applied to steel plate
Add frictional force to the right;And then opposite effect power is applied to steel plate twice from blade 27, and then effectively tighten steel plate,
So that blade 27 is cut, cutting accuracy is improved, cutting efficiency is also improved.
It is rotated with cutting blade 27 using third driving unit 26;Third driving unit is driven using the second driving unit 25
26, blade 27 moves down, and is cut to steel plate;Movable block 24 is driven to move using the first driving unit, along perpendicular to leading
The direction cutting steel plate of rail.
In cutting, in order to avoid blade 27 overheats, cooling portion is increased, improves the service life of blade 27.
Using air pump 36, tracheae 35, it is passed through high pressure gas into outlet tube 34, storage cooling liquid, profit in babinet 37
It is passed through cooling liquid into tracheae 35 with hydraulic pump 38, connecting tube 39, and then is discharged by outlet tube 34.
Liquid is driven to flow using high pressure gas, faster, gas can be carried out effectively with liquid and mixes speed, injection effect
Fruit is more preferable, can effectively cool down to blade 27.
After the completion of primary cutting, the gear teeth in second gear 7 are engaged with lead screw 5, third gear 14 again, and then are driven
Emptying roller 3, support plate 10, rotating roller 21 carry out operation, carry out next circulation.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.