CN210923013U - Pneumatic type single wing drop test machine - Google Patents
Pneumatic type single wing drop test machine Download PDFInfo
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- CN210923013U CN210923013U CN201921165805.6U CN201921165805U CN210923013U CN 210923013 U CN210923013 U CN 210923013U CN 201921165805 U CN201921165805 U CN 201921165805U CN 210923013 U CN210923013 U CN 210923013U
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Abstract
The utility model discloses a pneumatic single-wing drop test machine, which comprises a bottom plate, a drop mechanism and a fixing mechanism, a motor is fixed on the bottom plate, an output shaft of the motor is connected with a first belt pulley, the first belt pulley is connected with a second belt pulley, the second belt pulley is connected with a speed reducer through a key, the speed reducer is connected with a first chain wheel, the first chain wheel is connected with a chain, one end of the chain is fixed at the bottom end of the inner wall of the first installation box, the other end of the chain is fixed at the top end of the first installation box, the chain is connected with a second chain wheel in a transmission way, the second chain wheel is connected with the first rotating shaft in a key way, the first rotating shaft is rotatably connected in the second mounting box, one side of the chain is in transmission connection with a third chain wheel, third sprocket keyed joint is in the second pivot, it establishes in first install bin to fall the mechanism, fixed establishment establishes the upside at first install bin. The device realizes the product drop test, and has the advantages of simple structure, low cost and easy operation.
Description
Technical Field
The utility model belongs to the technical field of drop test machine, concretely relates to pneumatic type single wing drop test machine.
Background
A drop test machine is also called a drop test stand and is a machine special for testing the damage condition of a product package after falling and evaluating the impact strength in the process of carrying. The testing machine lifts the packaged tested object to a given height and then the tested object freely falls off the ground, after the specified test times, the damage condition of the product is checked and recorded, and then the packaging design is improved. In the transportation process of the commodity, the outer package of the commodity is required to have good protectiveness so as to prevent the damage to the commodity caused by accidental falling.
Drop testers sold in the market at present are expensive, some of the drop testers are very complex in operation, large in size and rough in appearance, and even some of early developed instruments cannot realize angle drop and edge drop tests. The traditional drop test machine has the advantages of higher noise, no buffer device, no electric control drop and inaccurate drop position when in use. For this reason, we propose a pneumatic single-wing drop test machine to solve the problems existing in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pneumatic type single wing drop test machine to the drop test machine that proposes selling on the existing market among the solution above-mentioned background is expensive, and some operations are very complicated, bulky, the outward appearance is coarse, and the instrument of some early developments even can't realize that the angle falls, the arris drop test. The traditional drop test machine has the problems of higher noise, no buffer device, no electric control drop and inaccurate drop position when in use.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a pneumatic type single-wing drop testing machine comprises a bottom plate, a drop mechanism and a fixing mechanism, wherein a motor is fixed on one side of the upper end of the bottom plate, a first belt pulley is connected to the end part of an output shaft of the motor in a keyed mode, a second belt pulley is connected to one side of the first belt pulley in a transmission mode through a conveying belt, the second belt pulley is connected to an input shaft of a speed reducer in a keyed mode, the speed reducer is fixed to the bottom plate, a first chain wheel is connected to the end part of the output shaft of the speed reducer in a keyed mode, a chain is connected to the first chain wheel in an upper meshed transmission mode, one end of the chain is fixed to the rear side of the bottom end of the inner wall of a first installation box, the other end of the chain is fixed to the front side of the top end of the first installation box, a second chain wheel is connected to the upper end of the chain in a meshed transmission mode, the second chain is, third sprocket keyed joint is in the second pivot, the second pivot is rotated and is connected in the second install bin, fixedly connected with stand between lower extreme one side of second install bin and the bottom plate, it sets up in first install bin to fall the mechanism, fixed establishment sets up the upside at first install bin.
Preferably, it includes the cylinder to fall the mechanism, the cylinder is fixed on the inner wall of first install bin, the tailpiece of the piston rod portion of cylinder is fixed with the rack, the rear end of cylinder is fixed with the slider, the slider slides in the slide rail, the slide rail is installed on the inner wall of first install bin, the front end meshing transmission of rack is connected with the gear, the gear key is connected in the third pivot, one side of third pivot is fixed with falls the arm, the lower extreme that falls the arm is fixed with the backup pad.
Preferably, an electromagnet is fixed on the inner wall of the first installation box, a lock tongue is arranged on one side of the electromagnet, a support seat is arranged in the middle of the lock tongue, the support seat is fixed on the inner wall of the first installation box, the end part of the lower end of the lock tongue is inserted into a locking hole, and the locking hole is arranged on one side of a falling arm.
Preferably, the rear side that falls the arm is provided with the buffering and glues the post, the buffering is glued the post and is installed on the rear side inner wall of first install bin.
Preferably, fixed establishment includes first slide bar, the upper end at first install bin is fixed to first slide bar, sliding connection has first regulating block on the first slide bar, one side of first regulating block, be fixed with the second slide bar, sliding connection has the second regulating block on the second slide bar, one side sliding connection of second regulating block has the third slide bar, the lower extreme end fixing of third slide bar has tight head of clamp, equal spiro union has the jackscrew on first regulating block and the second regulating block.
Preferably, a third installation box is arranged on the outer side of the speed reducer, the third installation box is installed on the bottom plate, a guide rod is fixed to the upper end of the third installation box, a guide sleeve is connected to the outer side of the guide rod in a sliding mode and fixed to the top end of the first installation box, and the chain penetrates through an inner cavity of the guide rod.
Preferably, a pointer is fixed on the upper side of the rear end of the first installation box, and a graduated scale matched with the pointer is fixed on the upright post.
Preferably, proximity switches are installed at the bottom end of the second installation box and the top end of the third installation box, and a decoder is installed at one end of the second rotating shaft.
Preferably, the outer sides of the motor, the first belt pulley and the second belt pulley are provided with protective covers, and the protective covers are installed on the bottom plate.
Preferably, the supporting plate and the clamping head are both provided with cross grooves.
The utility model discloses a technological effect and advantage: the utility model provides a pneumatic type single wing drop test machine compares with prior art, has following advantage:
1. the utility model drives the first belt pulley to rotate through the motor, further the first belt pulley drives the second belt pulley to rotate through the conveyor belt, further the second belt pulley drives the speed reducer to work, further the rotating speed is reduced, then the speed reducer drives the first chain pulley to rotate, the first chain pulley drives the chain to move under the matching of the second chain pulley and the third chain pulley, further the height of both ends of the chain is changed, further the chain drives the first installation box to move up and down along the guide rod, the falling arm is arranged in the first installation box, the product to be detected is placed on the falling arm, further the first installation box drives the product to realize height adjustment, proximity switches are respectively arranged on the first installation box and the second installation box, the up-down stroke limit function of the first installation box is realized, the decoder is arranged on the second rotating shaft, the moving height of the first installation box is calculated by detecting the number of rotating turns of, and the data are displayed, so that the data can be observed and recorded conveniently, and the work is facilitated;
2. the utility model generates magnetic force by electrifying the electromagnet, then the electromagnet attracts the upper end of the spring bolt, further the lower end of the spring bolt leaves the locking hole on the falling arm, then the piston rod of the cylinder drives the rack to move downwards, further the rack drive gear rotates anticlockwise, further the gear drives the third rotating shaft to rotate, further the third rotating shaft drives the falling arm to rotate anticlockwise around the axial lead of the third rotating shaft, further the falling arm rotates rapidly towards the upper back to separate from the product, the product does free falling motion downwards under the action of gravity, the product falls onto the bottom plate below to realize falling simulation, the traditional falling device enables swinging rapid motion by releasing the elastic potential energy after the extension spring, the design needs a special motor and a reset mechanism to carry out the reset process of the swing arm, the use process is not only noisy, but also the running process is not steady, and faults are easy to occur, the swing arm collision is also bigger, and the life of complete machine is not long, and this design has improved the transmission and has fallen the mode, adopts pneumatics to fall the device, falls falling of arm and has accomplished by the cylinder with the motion that resets, has removed reset motor from, and the operation is maintained simply, and the spring bolt that adopts electromagnet control simultaneously falls the locking of arm, has effectively realized the control to falling the arm, and operating personnel simple to operate more.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the point A of the present invention;
fig. 3 is an X perspective view of the present invention;
FIG. 4 is an enlarged view of the point B of the present invention;
FIG. 5 is an enlarged view of the point C of the present invention;
FIG. 6 is an enlarged view of the utility model at position D;
fig. 7 is a structure diagram of the falling mechanism of the utility model.
Reference numerals: 1. a base plate; 2. a motor; 3. a first pulley; 4. a second pulley; 5. a speed reducer; 6. a first sprocket; 7. a chain; 8. a first installation box; 9. a second sprocket; 10. a first rotating shaft; 11. a second installation box; 12. a third sprocket; 13. a second rotating shaft; 14. a column; 15. a falling mechanism; 1501. a cylinder; 1502. a rack; 1503. a slider; 1504. a slide rail; 1505. a gear; 1506. a third rotating shaft; 1507. a drop arm; 1508. a support plate; 1509. an electromagnet; 1510. a latch bolt; 1511. a supporting seat; 1512. a locking hole; 1513. buffering the rubber column; 16. a fixing mechanism; 1601. a first slide bar; 1602. a first regulating block; 1603. a second slide bar; 1604. a second regulating block; 1605. a third slide bar; 1606. a clamping head; 1607. carrying out top thread; 17. a guide bar; 18. a third installation box; 19. a guide sleeve; 20. a pointer; 21. a graduated scale; 22. a proximity switch; 23. a decoder; 24. a protective cover; 25. A cross-shaped groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a pneumatic type single wing drop test machine as shown in figures 1-7, which comprises a bottom plate 1, a drop mechanism 15 and a fixing mechanism 16, wherein a motor 2 is fixed on one side of the upper end of the bottom plate 1, the motor 2 is a three-phase asynchronous motor, the end part of the output shaft of the motor 2 is in key connection with a first belt pulley 3, one side of the first belt pulley 3 is connected with a second belt pulley 4 through a conveyor belt transmission, the second belt pulley 4 is in key connection with the input shaft of a speed reducer 5, the speed reducer 5 is a worm gear speed reducer, the speed reducer 5 is fixed on the bottom plate 1, the end part of the output shaft of the speed reducer 5 is in key connection with a first chain wheel 6, the upper occlusion transmission of the first chain wheel 6 is connected with a chain 7, one end of the chain 7 is fixed on the rear side of the bottom end of the inner wall of a first installation, the upper end interlock transmission of chain 7 is connected with second sprocket 9, 9 keyed connection of second sprocket is on first pivot 10, first pivot 10 rotates to be connected in second install bin 11, one side interlock transmission that chain 7 is close to second sprocket 9 is connected with third sprocket 12, third sprocket 12 keyed connection is on second pivot 13, second pivot 13 rotates to be connected in second install bin 11, fixedly connected with stand 14 between lower extreme one side of second install bin 11 and bottom plate 1, it sets up in first install bin 8 to fall mechanism 15, fixed establishment 16 sets up the upside at first install bin 8.
Preferably, the falling mechanism 15 comprises an air cylinder 1501, the air cylinder 1501 is fixed on the inner wall of the first installation box 8, a rack 1502 is fixed at the end of a piston rod of the air cylinder 1501, a slider 1503 is fixed at the rear end of the air cylinder 1501, the slider 1503 slides in a slide rail 1504, the slide rail 1504 is installed on the inner wall of the first installation box 8, a gear 1505 is in meshing transmission connection with the front end of the rack 1502, the gear 1505 is in key connection with a third rotating shaft 1506, a falling arm 1507 is fixed on one side of the third rotating shaft 1506, and a support plate 1508 is fixed at the lower end of the falling arm 1507.
Through adopting above-mentioned technical scheme, adopt the pneumatics to fall the device, fall arm 1507 fall with the motion that resets by cylinder 1501 accomplishes, removed reset motor from, operation maintenance is simple.
Preferably, an electromagnet 1509 is fixed on the inner wall of the first installation box 8, a lock tongue 1510 is arranged on one side of the electromagnet 1509, a support seat 1511 is arranged in the middle of the lock tongue 1510, the support seat 1511 is fixed on the inner wall of the first installation box 8, the lower end of the lock tongue 1510 is inserted into a lock hole 1512, and the lock hole 1512 is arranged on one side of the falling arm 1507.
Through adopting above-mentioned technical scheme, the locking that falls arm 1507 is carried out to spring bolt 1510 that adopts electro-magnet 1509 to control, has effectively realized the control to falling arm 1507, and operating personnel simple to operate more.
Preferably, the rear side of the falling arm 1507 is provided with a buffer rubber column 1513, and the buffer rubber column 1513 is installed on the inner wall of the rear side of the first installation box 8.
Through adopting above-mentioned technical scheme, fall arm 1507 rotate after certain angle with the polyurethane material's at rear buffering glue post 1513 bump, stop falling arm 1507 pivoted action, fall the action and end, play spacing, protection and fall the effect of arm 1507, noise abatement's production simultaneously.
Preferably, the fixing mechanism 16 includes a first sliding rod 1601, the first sliding rod 1601 is fixed in the upper end of the first installation box 8, a first adjusting block 1602 is connected to the first sliding rod 1601 in a sliding manner, a second sliding rod 1603 is fixed on one side of the first adjusting block 1602, a second adjusting block 1604 is connected to the second sliding rod 1603 in a sliding manner, a third sliding rod 1605 is connected to one side of the second adjusting block 1604 in a sliding manner, a clamping head 1606 is fixed on the lower end portion of the third sliding rod 1605, and a top wire 1607 is screwed on the first adjusting block 1602 and the second adjusting block 1604.
Through adopting above-mentioned technical scheme, slide the altitude mixture control that realizes second slide bar 1603 from top to bottom at first slide bar 1601 through first regulating block 1602, slide the front and back position adjustment that realizes pressing from both sides tight head 1606 through second regulating block 1604 on second slide bar 1603, slide the altitude mixture control that realizes pressing from both sides tight head 1606 from top to bottom at second regulating block 1604 through third slide bar 1605, through jackscrew 1607 after the position of adjusting tight head 1606 first regulating block 1602 and first slide bar 1601, and second regulating block 1604 and second slide bar 1603 and third slide bar 1605 are fixed together, and then press from both sides the product tightly between backup pad 1508 and clamp tight head 1606, simple structure, it is convenient to adjust, it is tight.
Preferably, a third installation box 18 is arranged outside the speed reducer 5, the third installation box 18 is installed on the bottom plate 1, a guide rod 17 is fixed at the upper end of the third installation box 18, a guide sleeve 19 is slidably connected to the outside of the guide rod 17, the guide sleeve 19 is fixed at the top end of the first installation box 8, and the chain 7 penetrates through the inner cavity of the guide rod 17.
Through adopting above-mentioned technical scheme, make first install bin 8 slide from top to bottom along guide bar 17, play spacing first install bin 8's effect, chain 7 passes in following guide bar 17 simultaneously, realizes the protection to chain 7.
Preferably, a pointer 20 is fixed on the upper side of the rear end of the first installation box 8, and a graduated scale 21 matched with the pointer 20 is fixed on the upright post 14.
Through adopting above-mentioned technical scheme, first install bin 8 up-and-down motion pointer 20 up-and-down motion, and then instruct first install bin 8 current height through pointer 20 and scale 21, make things convenient for operating personnel to observe.
Preferably, proximity switches 22 are installed at the bottom end of the second installation box 11 and the top end of the third installation box 18, and a decoder 23 is installed at one end of the second rotating shaft 13.
Through adopting above-mentioned technical scheme, proximity switch 22 sets up and realizes first install bin 8 up-down stroke limit function, and decoder 23 detects the height that first install bin 8 removed is calculated to 13 rotatory turns of second pivot to show, be convenient for observe, record data, convenient work.
Preferably, the motor 2, the first pulley 3 and the second pulley 4 are provided with a protective cover 24 on the outer side, and the protective cover 24 is mounted on the bottom plate 1.
Through adopting above-mentioned technical scheme, realize motor 2, first belt pulley 3 and second belt pulley 4's isolation, protection.
Preferably, the cross slot 25 is provided in both the support plate 1508 and the clamping head 1606.
By adopting the technical scheme, the tested products with different posture angles can be conveniently placed, and the maneuverability and flexibility of the device are improved.
Because the falling arm does the swing motion, after the falling arm is analyzed, the force required by the cylinder is the largest when the falling arm is at the end position.
The fall arm rotation angle is known to be 49 °. The distance L between the center of gravity and the center of the rotating shaft is 160.69mm
T＝mg·L
Torque at this time
Tmax＝mg·L＝6.44×9.8×160.69×10-3＝10.14N·m
A spur gear of a radius is preliminarily selected.
Because of the fact that
The force actually provided by the cylinder is required:
the cylinder efficiency is 85%, the force provided by the cylinder theory at least needs to be
The air source pressure is 0.3MPa, and the diameter of the cylinder is 50 mm. And checking a gas outlet table of the cylinder theory.
The cylinder model selected was JMDBB 80G-50.
From the table data, we obtain:
FIN＝589N；
FOUT＝513N；
calculated as cylinder efficiency 85%:
F’IN＝FIN×85％＝500.65N
F’OUT＝FOUT×85％＝436.05N
actual torque provided:
T＝F’IN·r＝500.65×36×10-3＝18.02N·m
the moment of inertia of the drop arm was analyzed by Solidworks:
l＝1.12kg·m2
the angular acceleration of the fall arm at the onset of the fall can be calculated:
therefore, the selected cylinder type: JMDBB 80G-50.
Design according to tooth surface contact strength
Calculated from a design calculation formula, i.e.
(1) Determining respective calculated values within a formula
1) Trial selection of load factor Kt＝1.3。
2) The torque transmitted by the pinion is calculated. (Preset Gear module m is 3mm, diameter d is 72mm)
T＝F’IN·r＝500.65×36＝1.802×104N·mm (4-9)
3) Selecting tooth width factor
4) The elastic influence coefficient of the material is found
5) Checking according to the hardness of the tooth surface:
contact fatigue strength limit of pinion gear
σHlim1＝600MPa；
Contact fatigue strength limit of rack
σHlim 2＝500MPa；
6) Number of cycles of working stress of gear
N＝60njLh(4-10)
The number of stress cycles was calculated from the formula (4-10)
N1＝60n1jLh＝60×37.5×1×(8×300×10)＝5.4×107
7) Taking contact fatigue life coefficient
KHN1＝0.95
8) Calculating allowable contact fatigue stress
From the formula (4-11), it is calculated
(2) Computing
1) Trial calculation of the reference circle diameter d of the piniont1Of formula (4-8)
2) The peripheral speed v is calculated.
v＝v1＝200mm/s＝0.2m/s；
3) Calculating tooth width b
The tooth width can be calculated by the formula (4-12)
4) Calculating the ratio of tooth width to tooth height
Can be calculated from the formula (4-13)
Modulus of elasticity
Tooth height h 2.25mt＝2.25×1.50＝3.375
(3) And calculating the load coefficient.
According to the v-0.2 m/s and 7-level precision, looking up a manual to obtain a dynamic load coefficient;
a spur gear; finding out a use coefficient;
finding 7-grade precision by interpolation method when pinions are asymmetrically arranged
KHβ＝1.250；
By
KHβLooking up the distribution coefficient diagram of tooth load calculated by bending strength 1.250 to obtain
KFβ＝1.210；
Formula of load factor
K＝KAKvKHαKHβ(4-14)
Therefore, the load factor can be calculated from the formula (4-14)
K＝KAKvKHαKHβ＝1.5×1×1×1.250＝1.875
Reference circle diameter formula
Correcting the calculated reference circle diameter according to the actual load factor, which is obtained from the equation (4-15)
Calculation of modulus m from formula (4-13)
4.2.3 design according to tooth root bending Strength
The bending strength is designed according to the formula
(1) Trial selection KFt＝1.77
(2) Determining each calculated value in a formula
Checking the bending fatigue strength limit of pinion
σFlim1＝500MPa；
Bending strength limit of rack
σlim2＝380MPa；
1) Obtaining the bending fatigue life coefficient K by looking up the bending fatigue life coefficient graphFN1＝0.95,KFN2＝0.95
2) Calculating allowable bending fatigue stress
The bending fatigue safety coefficient S is 1.4 and is obtained by the formula (4-17)
3) Calculating the load factor K
K＝KA×KV×KFβ×KFα(4-18)
The load factor K is obtained from the formula (4-18)
K＝KA×KV×KFβ×KFα＝1.5×1×1×1.185＝1.78
4) Finding tooth form factor
Looking up Y from tooth form coefficient tableFa1＝2.66,YFa2＝2.05
5) Finding the stress correction factor
Looking up Y from the stress correction coefficient tableSa1＝1.59，YSa2＝1.96。
6) For counting racks and pinions
And compared.
And comparing to obtain the numerical value of the rack.
(3) Calculated by the formula (4-16)
The bending strength is mainly determined by the size of the gear module m, and the tooth surface contact fatigue strength is mainly determined by the gear diameter. Taking m as 3mm, and calculating reference circle diameter d according to contact strength1Calculate the number of teeth (50.80 mm)
The above calculation procedure verifies that a gear with a module m of 3 and a diameter d of 72mm is satisfactory in terms of strength.
4.3 design and calculation of the spindle
1. According to the working condition of the shaft, the material and the heat treatment method are selected, the allowable stress is determined, and the gear rotating speed n is calculated to be 37.5 r/min. The diameter d of the reference circle of the gear is 72 mm. No. 45 steel is selected for hardening and tempering.
Looking up the relevant tables in the mechanical design Manual, the tensile strength σb650MPa, looking up the manual to obtain the allowable bending stress [ sigma ]-1]b＝60MPa。
2. Estimation of minimum diameter from torsional strength
It is known that: p684 w
Tmax＝10.14N·m
Diameter of the shaft
In the formula:
p is the power transmitted by the shaft;
n-the rotational speed of the shaft.
Find handbook to get A0Calculated as formula (4-21) as 103:
considering the shaft with two keyways, the shaft is enlarged by 15% and taken to the standard value, i.e. d is 30 mm.
3. Structural design of shaft
(1) The shaft is designed as a stepped shaft, as shown in fig. 4.1, according to T1.965 × 104N mm, the two ends of the shaft adopt SB6806ZZ bearings, the width B of the bearing is 7mm, and the outer diameter D of the bearing is 42 mm. The bearing is axially positioned by a sleeve and a shaft shoulder, and a fillet r is 1.2 mm. The diameter of a gear shaft head is 35mm, the height h of a positioning ring is 2.5mm, and the rest round corners are 1.2 mm.
Model selection and calculation of motor and speed reducer
The load F is 1600N, and the initial lifting speed v' is 80 mm/s;
according to known working requirements and conditions, a Y-shaped totally-enclosed cage type three-phase asynchronous motor is selected.
Power PwCalculating the formula:
Pw＝Fv (4-22)
it can be calculated from the formulas (4-22)
Pw＝Fv’＝1600×0.08＝128W；
The overall efficiency formula:
η＝η1η2η3η4η5(4-23)
in the formula:
η10.96-belt drive efficiency;
η20.40-worm gear reducer efficiency;
η30.90 — open chain transfer efficiency;
η4＝η50.98 — the transfer efficiency of a pair of bearings;
the total efficiency can be calculated from the formula (4-23)
η＝η1η2η3η4η5＝0.96×0.40×0.90×0.98×0.98＝0.332
Motor power calculation formula
Calculating the required motor power according to the formula (4-24)
Three asynchronous machine of Y series of first election, the model is: Y80M 2-4;
the maximum torque is T-2.3, and the rated rotation speed is 1390 r/min;
1) determination of the Transmission ratio
Speed of lifting
v’＝0.08m/s＝4.8m/min；
Formula for calculating rotating speed of output shaft
Wherein:
v' — the lifting speed;
d3-reducer output sprocket diameter;
the output speed of the speed reducer is calculated by the formula (4-25)
Preliminary calculation formula of total transmission ratio
Initial total ratio from equation (4-26)
Selected v-belt drive ratio i12; speed reducer transmission ratio i2＝60；
Total transmission ratio calculation formula
i＝i1·i2(4-27)
The total gear ratio is calculated according to the formula (4-27)
i＝i1·i2＝2×60＝120；
2) Calculating output torque
Calculating the torque according to equation (4-28)
3) Correcting output torque
According to the using conditions, the operation is carried out for 8 hours, and the impact is small;
K＝1；
T1＝T·K＝96N·m
4) input power calculation formula
Calculating input power according to equation (4-29)
5) Selecting the specification of the model of the reducer
Look-up table 4.3 selects the retarder type.
TABLE 4.3 decelerator model selection table
Selecting a WPS model 70, a transmission ratio 1/60, an input power of 0.52KW and an output torque of 97 N.m; the model of the speed reducer is as follows: WPS60SIZE 70;
6) motor model determination
The look-up table 4.4 selects the motor model.
TABLE 4.4 Motor model selection Table
According to the power and load continuous condition motor, look-up 4.4 to obtain: Y80M2-4 meets the requirement; the final lifting/lowering speed is:
design and calculation of 4.5V belt drive
1) Determining a calculated power Pca
Pca＝KAPd(4-30)
Wherein:
KA-a working condition coefficient;
Pdsmall pulley power
Looking up the manual of mechanical design to obtain the coefficient of working condition KA＝1.2；
Known small pulley power Pd＝0.75kW
Calculating the power according to the formula (4-30)
Pca＝KAPd＝1.1×0.75＝0.825kW
2) Selecting the belt type of V-belts
Because the rotating speed n of the small pulley is 1390 r/min;
according to PcaAnd n is a common V belt type selection chart in a checking manual, and a Z belt type is selected.
3) Determining a reference diameter d of a pulleydAnd checking the belt speed v
In the reference diameter series of the ordinary V belt wheel in the checking manual, the reference diameter d1 of the small belt wheel is 75mm
II checking the belt speed v
The velocity of the V belt was calculated according to the formula (4-31)
The belt speed is suitable since v is < 30m/s and 5 m/s.
III calculating the reference diameter of the large belt wheel
Calculating the reference diameter of the large pulley according to the equation (4-32)
dd2＝i1dd1＝2×75＝150mm
Looking up the reference diameter series of the common V belt wheel in the manual, and taking the standard value as dd2150mm 5) the center distance a and the reference length Ld of the V-belt are determined
0.7(dd1+dd2)≤a0≤2(dd1+dd2) (4-33)
I calculating the range of the center distance according to the formula (4-33)
157≤a0≤450
Initial centering distance a0＝450mm
II calculating the reference length required for the strip
Calculating the reference length of the V belt according to the formula (4-34)
Looking up the standard length table of V-belt in the manual, the standard length Ld of the selected belt is 1330mm
III calculating the actual center distance a
From a to amin＝a-0.015Ld，amax＝a+0.03Ld
The range of the center distance is 467-526 mm
5) Checking wrap angle α on small belt wheel1
6) Number of bands z
I calculating rated power Pr of single V band
From dd175mm and n1Looking up the basic rated power table of a single common V band in a manual at 1390r/min to obtain P0＝0.35kW
From n to11390r/min, i 2 and Z bands, rated power of single ordinary V band in manual
Increment table to get Δ P0＝0.03kW
Pr＝(P0+ΔP0)·Kα·KL(4-35)
Looking up the wrap angle correction coefficient table in the manual to obtain Kα＝0.98；
Looking up the table of correction coefficient with length in the manual to obtain KL＝1.13；
Calculating rated power according to the formula (4-35)
Pr＝(P0+ΔP0)·Kα·KL＝(0.35+0.03)×0.98×1.13＝0.42kW
II calculating the number of V bands z
The number of the elements is calculated according to the formula (4-36)
7) Calculating the initial tension F0 of a single V belt
Looking up a mass table of the positioning length of the V-shaped belt in the manual to obtain the mass q of the Z-shaped belt per unit length of 0.060 kg/m;
therefore, the initial pull-out force is calculated according to the formula (4-37)
8) Calculating the axial pressure
Calculating the axial pressure according to the equation (4-38)
9) Main design results
The tape type: z type
Number of bands: 2 root of Chinese thorowax
Diameter of the belt wheel: dd1＝75mm,dd2＝150mm
Center distance of the belt: a is 486.5mm
The working principle is as follows: firstly, a product to be tested is placed on a supporting seat 1511 at the lower end of a falling arm 1507, then a first adjusting block 1602 is moved downwards, then the first adjusting block 1602 drives a second slide bar 1603 to slide downwards until a clamping head 1606 at the lower end of a third slide bar 1605 is close to the top end of the product, then a third slide bar 1605 is driven by a second adjusting block 1604 to move back and forth along the second slide bar 1603 until the clamping head 1606 is located at the middle position of the product, then the third slide bar 1605 is moved downwards, then the third slide bar 1605 drives the clamping head 1606 to be in close contact with the top end of the product, the first adjusting block 1602 and the second adjusting block 1604 are locked by a jackscrew 1607, and the product is clamped under the action of a supporting plate 1508 and the clamping head 1606;
then, the motor 2 is started, the motor 2 drives the first belt pulley 3 to rotate, the first belt pulley 3 drives the second belt pulley 4 to rotate through the conveying belt, the second belt pulley 4 drives the speed reducer 5 to work, the rotating speed is reduced, then the speed reducer 5 drives the first chain wheel 6 to rotate, the first chain wheel 6 drives the chain 7 to move under the matching of the second chain wheel 9 and the third chain wheel 12, the heights of the two ends of the chain 7 are changed, the chain 7 drives the first installation box 8 to move upwards along the guide rod 17, and the first installation box 8 drives the product to move upwards until the preset height is reached;
then the electromagnet 1509 is electrified, the electromagnet 1509 pulls the lock tongue 1510 backwards, the lower end of the lock tongue 1510 leaves a locking hole 1512 on the falling arm 1507, the falling arm 1507 is in an open state, meanwhile, a piston rod of the air cylinder 1501 drives the rack 1502 to move downwards, the rack 1502 drives the gear 1505 to rotate anticlockwise, the gear 1505 drives the third rotating shaft 1506 to rotate, the third rotating shaft 1506 drives the falling arm 1507 to rotate anticlockwise around the axis line of the third rotating shaft 1506, the falling arm 1507 rapidly rotates backwards and upwards to be separated from a product, the product moves downwards in a free falling body motion under the action of gravity, and the product falls onto the bottom plate 1 below to realize falling simulation;
then cylinder 1501 drives rack 1502 and upwards stretches out, and then drive gear 1505 clockwise rotation, and the same reason drives falls arm 1507 and gets back to the home position, gives the outage of electro-magnet 1509, advances to stretch out forward latch 1510 under the spring force effect of spring, and then the lower extreme of latch 1510 inserts in falling the locking hole 1512 on the arm 1507, and then realizes locking, fixing, the circulation goes on in proper order falling arm 1507.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (10)
1. The utility model provides a pneumatic type single wing drop test machine, includes bottom plate (1), falls mechanism (15) and fixed establishment (16), its characterized in that: the upper end of the bottom plate (1) is fixedly provided with a motor (2), the output shaft end part of the motor (2) is in key connection with a first belt pulley (3), one side of the first belt pulley (3) is connected with a second belt pulley (4) through transmission of a conveyor belt, the second belt pulley (4) is in key connection with an input shaft of a speed reducer (5), the speed reducer (5) is fixed on the bottom plate (1), the output shaft end part of the speed reducer (5) is in key connection with a first chain wheel (6), the upper meshing transmission of the first chain wheel (6) is connected with a chain (7), one end of the chain (7) is fixed on the rear side of the bottom end of the inner wall of a first installation box (8), the other end of the chain is fixed on the front side of the top end of the first installation box (8), the upper meshing transmission of the chain (7) is connected with a second chain wheel (9), and the second chain wheel (9) is in, first pivot (10) rotate to be connected in second install bin (11), one side interlock transmission that chain (7) are close to second sprocket (9) is connected with third sprocket (12), third sprocket (12) keyed joint is on second pivot (13), second pivot (13) rotate to be connected in second install bin (11), fixedly connected with stand (14) between lower extreme one side of second install bin (11) and bottom plate (1), it sets up in first install bin (8) to fall mechanism (15), fixed establishment (16) set up the upside in first install bin (8).
2. A pneumatic single-wing drop tester according to claim 1, characterized in that: fall mechanism (15) and include cylinder (1501), cylinder (1501) are fixed on the inner wall of first install bin (8), the piston rod tip of cylinder (1501) is fixed with rack (1502), the rear end of cylinder (1501) is fixed with slider (1503), slider (1503) slide in slide rail (1504), slide rail (1504) are installed on the inner wall of first install bin (8), the front end meshing transmission of rack (1502) is connected with gear (1505), gear (1505) key joint is on third pivot (1506), one side of third pivot (1506) is fixed with falls arm (1507), the lower extreme that falls arm (1507) is fixed with backup pad (1508).
3. A pneumatic single-wing drop tester according to claim 2, characterized in that: be fixed with electro-magnet (1509) on the inner wall of first install bin (8), one side of electro-magnet (1509) is provided with spring bolt (1510), the centre of spring bolt (1510) is provided with supporting seat (1511), supporting seat (1511) are fixed on the inner wall of first install bin (8), the lower extreme tip of spring bolt (1510) is pegged graft in locking hole (1512), locking hole (1512) set up the one side of falling arm (1507).
4. A pneumatic single-wing drop tester according to claim 2, characterized in that: the rear side that falls arm (1507) is provided with buffering glue column (1513), install on the rear side inner wall of first install bin (8) buffering glue column (1513).
5. A pneumatic single-wing drop tester according to claim 1, characterized in that: fixed establishment (16) include first slide bar (1601), first slide bar (1601) are fixed in the upper end of first install bin (8), sliding connection has first regulating block (1602) on first slide bar (1601), one side of first regulating block (1602) is fixed with second slide bar (1603), sliding connection has second regulating block (1604) on second slide bar (1603), one side sliding connection of second regulating block (1604) has third slide bar (1605), the lower extreme end fixing of third slide bar (1605) has double-layered tight head (1606), all the spiro union has jackscrew (1607) on first regulating block (1602) and second regulating block (1604).
6. A pneumatic single-wing drop tester according to claim 1, characterized in that: the outer side of the speed reducer (5) is provided with a third installation box (18), the third installation box (18) is installed on the bottom plate (1), a guide rod (17) is fixed to the upper end of the third installation box (18), a guide sleeve (19) is connected to the outer side of the guide rod (17) in a sliding mode, the guide sleeve (19) is fixed to the top end of the first installation box (8), and the chain (7) penetrates through the inner cavity of the guide rod (17).
7. A pneumatic single-wing drop tester according to claim 1, characterized in that: pointer (20) are fixed on the upper side of the rear end of the first installation box (8), and graduated scale (21) matched with the pointer (20) is fixed on the upright post (14).
8. A pneumatic single-wing drop tester according to claim 6, characterized in that: proximity switches (22) are installed on the bottom of second install bin (11) and the top of third install bin (18) all, decoder (23) are installed to the one end tip of second pivot (13).
9. A pneumatic single-wing drop tester according to claim 1, characterized in that: the outside of motor (2), first belt pulley (3) and second belt pulley (4) is provided with safety cover (24), safety cover (24) are installed on bottom plate (1).
10. A pneumatic single-wing drop tester according to claim 2, characterized in that: cross grooves (25) are formed in the supporting plate (1508) and the clamping head (1606).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921165805.6U CN210923013U (en) | 2019-07-23 | 2019-07-23 | Pneumatic type single wing drop test machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921165805.6U CN210923013U (en) | 2019-07-23 | 2019-07-23 | Pneumatic type single wing drop test machine |
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| Publication Number | Publication Date |
|---|---|
| CN210923013U true CN210923013U (en) | 2020-07-03 |
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|---|---|---|---|
| CN201921165805.6U Expired - Fee Related CN210923013U (en) | 2019-07-23 | 2019-07-23 | Pneumatic type single wing drop test machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926742A (en) * | 2019-07-23 | 2020-03-27 | 东莞理工学院 | Pneumatic type single wing drop test machine |
| CN113588196A (en) * | 2021-08-29 | 2021-11-02 | 广州美亦丰试验设备有限公司 | Single-arm drop test machine |
-
2019
- 2019-07-23 CN CN201921165805.6U patent/CN210923013U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110926742A (en) * | 2019-07-23 | 2020-03-27 | 东莞理工学院 | Pneumatic type single wing drop test machine |
| CN113588196A (en) * | 2021-08-29 | 2021-11-02 | 广州美亦丰试验设备有限公司 | Single-arm drop test machine |
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