CN107290120B - Double-deck bed mechanical properties test equipment - Google Patents
Double-deck bed mechanical properties test equipment Download PDFInfo
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- CN107290120B CN107290120B CN201710601217.1A CN201710601217A CN107290120B CN 107290120 B CN107290120 B CN 107290120B CN 201710601217 A CN201710601217 A CN 201710601217A CN 107290120 B CN107290120 B CN 107290120B
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- 238000012360 testing method Methods 0.000 title claims abstract description 163
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical group [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000001133 acceleration Effects 0.000 claims description 5
- 238000009863 impact test Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011076 safety test Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a double-deck mechanical property test device which comprises a base, a support frame, a first sliding device, a second sliding device, a third sliding device, a first test device, a second test device and a plurality of third test devices, wherein the support frame is arranged on the base; the support frame is fixed on the base and is in a tetragonal structure, the support frame comprises a vertical column and a cross beam, the vertical column is arranged vertically, the cross beam is arranged along the horizontal direction and comprises two short sides which are arranged right opposite to each other and two long sides which are arranged right opposite to each other, and the first sliding device is arranged on the long sides; the second sliding device is arranged on the first sliding device; the third sliding device is arranged on the second sliding device; the first testing device is arranged at one end of the third sliding device, which is close to the base; the second testing device is arranged on the base; the third testing device is arranged around the supporting frame. The double-layer bed mechanical property testing device is convenient to use and good in testing effect.
Description
Technical Field
The invention relates to the technical field of furniture testing, in particular to a double-deck bed mechanical property testing device.
Background
The bunk beds with the up-down structures are used in most armies, schools and staff dormitories at present, the floor space can be greatly saved, more people can be contained in a limited space, and even a plurality of families can select the bunk beds as beds of children. However, since the safety test standard of the double-layer bed is implemented only in 2010, the test equipment specific to the double-layer bed is not available in the market, but only a part of the standard of the double-layer bed is roughly detected by a furniture mechanical property detection comprehensive tester, and the mechanical property of the double-layer bed cannot be comprehensively detected.
Disclosure of Invention
In view of the technical problems existing in the background technology, the invention aims to overcome the defects of the prior art and provide the double-layer bed mechanical property testing equipment which is convenient to use and good in testing effect.
In order to solve the technical problems, the invention adopts the following technical measures:
the double-deck mechanical property test equipment comprises a base, a support frame, a first sliding device, a second sliding device, a third sliding device, a first test device, a second test device and a plurality of third test devices; the support frame is fixed on the base and is in a tetragonal structure, the support frame comprises a vertical column and a cross beam, the vertical column is arranged vertically, the cross beam is arranged along the horizontal direction, the cross beam comprises two first short sides which are arranged right opposite to each other and two long sides which are arranged right opposite to each other, and the first sliding device is arranged on the long sides; the second sliding device is arranged on the first sliding device; the third sliding device is arranged on the second sliding device; the first testing device is arranged at one end of the third sliding device, which is close to the base; the first testing device comprises a first cylinder, a connecting sleeve and a first testing hammer which are sequentially arranged from top to bottom, and a rectangular through hole is formed in the side surface of the connecting sleeve, so that the cross section of the connecting sleeve along the vertical direction is in a shape of a Chinese character 'Hui'; an upper suction plate, an electromagnet and a lower suction plate are sequentially arranged in the rectangular through hole from top to bottom, a piston rod of the first air cylinder penetrates through the upper end of the connecting sleeve to be fixedly connected with the upper suction plate, and the lower suction plate penetrates through the lower end of the connecting sleeve to be fixedly connected with the first test hammer; the second testing device is arranged on the base and is used for detecting the strength of the upper bed column of the double-layer bed; the third testing device is arranged around the supporting frame and used for applying thrust to the side face of the double-deck bed and detecting the durability of the double-deck bed frame and the fastening piece.
As a further improvement, the first test hammer comprises a test seat, a first soft cushion and a plurality of first connecting rods connected between the test seat and the first soft cushion, wherein the first connecting rods are sleeved with springs matched with the first connecting rods, and the springs are used for reducing vibration caused to the first detection device during impact test.
As a further improvement, the rated elastic coefficient of the spring is (5.9+/-1) N/mm, and the total compression amount of the spring is not less than 60mm; the initial compression force of the spring is (1040+ -5) N.
As a further improvement, the second testing device comprises a first slide rail, a first support column and a second testing unit; the first sliding rail is arranged on the base along the long side direction, and the first support is in sliding connection with the base through the first sliding rail; the second test unit is arranged on the first support column and comprises a second connecting rod and a second test hammer, and the second test hammer is arranged on the second connecting rod; the second test hammer comprises a second air cylinder and a second cushion, the second air cylinder is arranged upwards along the vertical direction, the second cushion is fixedly connected with a piston rod of the second air cylinder, and a first guide rod is arranged on the second air cylinder and used for fixing the movement direction of the second air cylinder.
As a further refinement, the third test device comprises a second support column and a third test unit; the second support column is arranged on the base, the third test unit is arranged on the second support column and comprises a third air cylinder and a third test hammer, the third air cylinder faces the support frame, the third test hammer is connected with a piston rod of the third air cylinder through a steering piece, and a pressure sensor is arranged on the third test hammer.
As a further improvement, the number of the third test devices is 4, two third test devices are symmetrically arranged beside the long side, and the distance from the short side of one side is 50mm; the other two third testing devices are symmetrically arranged beside the short sides, and the distance from the long side of one side is 50mm.
As a further development, the first sliding device comprises a first drive motor and a first screw, the first drive motor having a minimum torque T min The method meets the following conditions: t (T) min ≥T f +T A
Wherein: t (T) f Torque required to overcome friction; t (T) A Is the torque required for acceleration.
As a further improvement, when the third testing device is used for testing, the first testing device is controlled to apply a load force with a preset magnitude to the center position of the upper bed surface of the double-layer bed, and then the third testing device wheel applies a load force with a preset magnitude to the double-layer bed.
As a further improvement, when the third testing device is used for testing, the first testing device is controlled to apply a load force with a preset magnitude to the center position of the upper bed surface of the double-layer bed, and then the third testing device arranged beside the long side and the third testing device arranged beside the short side apply a load force with a preset magnitude to the double-layer bed.
Compared with the prior art, the invention has the following advantages:
1. according to the mechanical property testing equipment for the double-deck bed, the first sliding device, the second sliding device and the third sliding device are adopted for adjusting the position of the first testing device, so that the first testing device can be adjusted in a three-dimensional mode, double-deck beds with different appearances and different sizes can be adapted during use, and the use is convenient.
2. According to the mechanical property testing equipment for the double-layer bed, the structural design of the first testing device is adopted, after the constant pressure test is applied, the impact force test can be carried out under the condition that the whole first testing device is not required to be moved, and the mechanical property testing equipment for the double-layer bed is convenient to use and simple in structure.
Drawings
FIG. 1 is a schematic structural diagram of a double-deck bed mechanical property testing device of the invention.
FIG. 2 is a schematic top view of a structure of a double-deck mechanical property testing device of the present invention.
FIG. 3 is a schematic diagram showing the assembly of the first, second and third sliding devices of the mechanical property testing apparatus for a double-deck bed according to the present invention.
FIG. 4 is a schematic structural diagram of a first testing device of the mechanical property testing equipment for the double-deck bed.
FIG. 5 is a schematic structural diagram of a second testing device of the mechanical property testing equipment for double beds.
FIG. 6 is a schematic structural diagram of a third test device of the mechanical property test equipment for the double-deck bed.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention is described in further detail below with reference to the attached drawings and detailed description:
referring to fig. 1 to 3, in an embodiment, a mechanical performance testing apparatus for a double-deck bed includes a base 100, a support frame 200, a first sliding device 300, a second sliding device 400, a third sliding device 500, a first testing device 600, a second testing device 700, and a plurality of third testing devices 800; the support 200 is fixed on the base 100, has a tetragonal structure, and comprises a vertical column and a cross beam, wherein the vertical column is arranged vertically, the cross beam is arranged along the horizontal direction, the cross beam comprises two short sides which are arranged right opposite, and two long sides which are arranged right opposite, and the first sliding device 300 is arranged on the long sides; the first slider 300 includes a first driving motor 310 and a first screw 320, and the first driving motor 310 has a minimum torque T min The method meets the following conditions: t (T) min ≥T f +T A
Wherein: t (T) f Torque required to overcome friction; t (T) A Is the torque required for acceleration.
The T is f The method meets the following conditions:
wherein: m is the weight of the load; g is gravity acceleration; μ is the coefficient of friction; p (P) B A lead of the first screw rod; η is the mechanical efficiency.
The T is A The method meets the following conditions:
wherein: j (J) B Load inertia of the first screw rod; alpha is the angular acceleration of the first screw rod. The torque range of the first driving motor 310 is selected to be 0.32 Nm-47.74 Nm and the speed range is selected to be 1000 r/min-3000 r/min through calculation. The first driving motor can drive the first slide betterA moving device 300.
The first bearing on the first screw rod 320 is fixedly provided with a moving plate 330, the length of the moving plate 330 extends from one long side to the other long side, the moving plate is used for setting the second sliding device 400, the long sides on two sides are provided with second sliding rails 340 parallel to each other, and the second sliding rails 340 are connected with the moving plate 330 through sliding blocks matched with the second sliding rails 340.
A rectangular through hole is formed in the middle of the moving plate 330, so that the moving plate 330 is integrally in a shape of a Chinese character 'hui', the second sliding device 400 is arranged on the moving plate 330 along the short side direction, the second sliding device 400 comprises a second driving motor 410 and a second screw rod 420, and a second bearing on the second screw rod 420 is fixedly connected with a fixing plate 430 for placing the third sliding device 500; the fixing plate 430 extends from one side of the second sliding device 400 to the other side, a third sliding rail 331 parallel to the second screw rod 420 is disposed on one side of the moving plate 330 away from the second sliding device 400, and the third sliding rail 331 is connected with the fixing plate 430 through a sliding block adapted to the third sliding rail 331. The third sliding device 500 is disposed on the fixing plate 430, and the third sliding device 500 includes a turbine lifter and a third screw;
referring to fig. 4, in the embodiment, the first testing device 600 is disposed at an end of the third sliding device 500 near the base 100; the first testing device 600 includes a first cylinder 610, a connecting sleeve 620, and a first testing hammer 630 sequentially disposed from top to bottom, where a rectangular through hole is formed on a side surface of the connecting sleeve 620, so that a cross section of the connecting sleeve 620 along a vertical direction is in a shape of a Chinese character 'hui'; an upper suction plate 621, an electromagnet 622 and a lower suction plate 623 are sequentially arranged in the rectangular through hole from top to bottom, a piston rod of the first cylinder 610 penetrates through the upper end of the connecting sleeve 620 to be fixedly connected with the upper suction plate 621, and the lower suction plate 623 penetrates through the lower end of the connecting sleeve 620 to be fixedly connected with the first test hammer 630.
The first test hammer 630 includes a test seat 631, a first cushion 633 and a plurality of first connecting rods 632 connected between the test seat 631 and the first cushion 633, and the first connecting rods 632 are sleeved with springs 634 adapted to the first connecting rods 632, so as to reduce vibration caused to the first detection device during impact test. The rated elastic coefficient of the spring 634 is (5.9+/-1) N/mm, and the total compression amount of the spring 634 is not less than 60mm; the initial compression force of the spring 634 is (1040±5) N. By selecting the spring 634, the spring 634 can provide the best cushioning during impact testing.
When the first testing device 600 performs a test, the third sliding device 500 is controlled to drive the first testing device 600 to move downwards, a load force with a preset magnitude is applied to the upper bed surface of the double-deck bed to perform a constant pressure test, when the impact force test is performed, the electromagnet 622 is electrified, the upper suction plate 621 and the lower suction plate 623 are attracted, the first cylinder 610 controls the piston rod to drive the first testing hammer 630 to rise, after reaching a required height, the electromagnet 622 is deenergized, the upper suction plate 621 is separated from the lower suction plate 623, the first testing hammer 630 performs a free falling motion, and the center of the upper bed surface of the double-deck bed is impacted.
Referring to fig. 5, in the embodiment, the second testing device 700 is disposed on the base 100, and is used for detecting the strength of the upper bed column of the bunk bed; the second testing device 700 includes a first slide rail 710, a first support 720, and a second testing unit 730; the first sliding rail 710 is disposed on the base 100 along the long side direction, and the first supporting column 720 is slidably connected with the base 710 through the first sliding rail 710; the second test unit 730 is disposed on the first support 720, and includes a second connecting rod 731 and a second test hammer, where the second test hammer is disposed on the second connecting rod 731; the second test hammer includes second cylinder 734 and second cushion 732, the second cylinder 734 sets up along vertical direction, the second cushion 732 with the piston rod fixed connection of second cylinder 734, be provided with first guide arm 733 on the second cylinder 734 for fixed the direction of motion of second cylinder 734, avoid under the circumstances of many times test, the piston rod direction of second cylinder 734 takes place the skew, causes the inaccuracy of testing result.
Referring to fig. 6, in an embodiment, the third testing device 800 includes a second support 810 and a third testing unit 820; the second support column 810 is disposed on the base 100, the third test unit 820 is disposed on the second support column 810, and includes a third cylinder 821 and a third test hammer 823, the third cylinder 821 is disposed towards the support frame 200, the third test hammer 823 is connected with a piston rod of the third cylinder 821 through a steering member 824, and a second guide rod 822 is disposed on the third cylinder 821 and used for fixing a movement direction of the third cylinder 821. The third test hammer 823 is provided with a pressure sensor 825. The measurement range of the pressure sensor 825 can be arbitrarily set to 0-250kg or 0-500kg, the resolution is 1/10000, the measurement accuracy of the pressure sensor 825 is + -1% under static conditions, and the measurement accuracy of the pressure sensor 825 is 0-5% (dynamic) under dynamic conditions, so that the pressure feedback during detection can be more accurate.
The number of the third testing devices 800 is 4, two third testing devices 800 are symmetrically arranged beside the long side, and the distance from the short side of one side is 50mm; the other two third test devices 800 are symmetrically disposed beside the short sides, and have a distance of 50mm from the long side of one side.
The third testing device 800 may select one of two testing methods when testing: the first testing device 600 is controlled to apply a load force with a predetermined magnitude to the center of the upper bed surface of the double-deck bed, and then the third testing device 800 is controlled to apply a load force with a predetermined magnitude to the double-deck bed. And two,: the first testing device 600 is controlled to apply a load force with a predetermined magnitude to the central position of the upper bed surface of the double-deck bed, and then the third testing device 800 arranged beside the long side and the third testing device 800 arranged beside the short side are controlled to apply a load force with a predetermined magnitude to the double-deck bed in a wheel flow manner. By the testing method, the durability of the double-deck bed frame and the fastener can be better and comprehensively detected, so that the detection result is more accurate.
Through the asymmetric arrangement of the third testing device 800, the vulnerable part of the double-layer bed can be detected, so that not only can a better testing effect be achieved, but also the assembly can be faster in the assembly process of the double-layer bed to be detected, and the position of the third testing device 800 does not need to be adjusted.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Claims (7)
1. The utility model provides a bunk bed mechanical properties test equipment which characterized in that: the device comprises a base, a support frame, a first sliding device, a second sliding device, a third sliding device, a first testing device, a second testing device and a plurality of third testing devices; the support frame is fixed on the base and is in a tetragonal structure, the support frame comprises a vertical column and a cross beam, the vertical column is arranged vertically, the cross beam is arranged along the horizontal direction and comprises two short sides which are arranged right opposite to each other and two long sides which are arranged right opposite to each other, and the first sliding device is arranged on the long sides;
the second sliding device is arranged on the first sliding device; the third sliding device is arranged on the second sliding device; the first testing device is arranged at one end, close to the base, of the third sliding device;
the first testing device comprises a first cylinder, a connecting sleeve and a first testing hammer which are sequentially arranged from top to bottom, and a rectangular through hole is formed in the side surface of the connecting sleeve, so that the cross section of the connecting sleeve along the vertical direction is in a shape of a Chinese character 'Hui'; an upper suction plate, an electromagnet and a lower suction plate are sequentially arranged in the rectangular through hole from top to bottom, a piston rod of the first air cylinder penetrates through the upper end of the connecting sleeve to be fixedly connected with the upper suction plate, and the lower suction plate penetrates through the lower end of the connecting sleeve to be fixedly connected with the first test hammer;
the second testing device is arranged on the base and is used for detecting the strength of the upper bed column of the double-layer bed;
the third testing device is arranged around the supporting frame and is used for applying thrust to the side face of the double-deck bed and detecting the durability of the double-deck bed frame and the fastening piece;
the second testing device comprises a first sliding rail, a first pillar and a second testing unit; the first sliding rail is arranged on the base along the long side direction, and the first support is in sliding connection with the base through the first sliding rail; the second test unit is arranged on the first support column and comprises a second connecting rod and a second test hammer, and the second test hammer is arranged on the second connecting rod; the second test hammer comprises a second air cylinder and a second cushion, the second air cylinder is arranged upwards along the vertical direction, the second cushion is fixedly connected with a piston rod of the second air cylinder, and a first guide rod is arranged on the second air cylinder and used for fixing the movement direction of the second air cylinder;
the third testing device comprises a second support column, a third testing unit, a third cylinder and a third testing hammer, wherein the second support column is arranged on the base, the third testing unit is arranged on the second support column, the third cylinder faces the supporting frame, the third testing hammer is connected with a piston rod of the third cylinder through a steering piece, and a pressure sensor is arranged on the third testing hammer.
2. The device for testing mechanical properties of a double-deck bed according to claim 1, wherein the first testing hammer comprises a testing seat, a first soft pad and a plurality of first connecting rods connected between the testing seat and the first soft pad, and springs matched with the first connecting rods are sleeved on the first connecting rods and used for reducing vibration caused to the first testing device during impact testing.
3. The double-deck mechanical property testing device according to claim 2, wherein the rated elastic coefficient of the spring is (5.9±1) N/mm, and the total compression amount of the spring is not less than 60mm; the initial compression force of the spring is (1040+ -5) N.
4. The mechanical property testing device for a double-layer bed according to claim 1, wherein the number of the third testing devices is 4, two of the third testing devices are symmetrically arranged beside the long side, and the distance from the short side of one side is 50mm; the other two third testing devices are symmetrically arranged beside the short sides, and the distance from the long side of one side is 50mm.
5. The bunk bed mechanical property testing device according to claim 1, wherein the first sliding means comprises a first drive motor and a first screw, the first drive motor having a minimum torque T min The method meets the following conditions: t (T) min ≥T f +T A ；
Wherein: t (T) f Torque required to overcome friction; t (T) A Is the torque required for acceleration.
6. The mechanical properties test device for a bunk bed according to claim 4, wherein the third test means is adapted to control the first test means to apply a predetermined amount of load force to the center of the upper bunk bed surface during the test, and then the third test means is adapted to apply a predetermined amount of load force to the bunk bed.
7. The mechanical property testing device of claim 4, wherein the third testing device controls the first testing device to apply a predetermined load force to the center of the upper surface of the double-deck bed when testing, and then the third testing device disposed beside the long side and the third testing device disposed beside the short side apply a predetermined load force to the double-deck bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601217.1A CN107290120B (en) | 2017-07-21 | 2017-07-21 | Double-deck bed mechanical properties test equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710601217.1A CN107290120B (en) | 2017-07-21 | 2017-07-21 | Double-deck bed mechanical properties test equipment |
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| CN107290120A CN107290120A (en) | 2017-10-24 |
| CN107290120B true CN107290120B (en) | 2023-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710601217.1A Active CN107290120B (en) | 2017-07-21 | 2017-07-21 | Double-deck bed mechanical properties test equipment |
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| CN107290120A (en) | 2017-10-24 |
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