CN104900115A - Portable comprehensive mechanical demonstrator - Google Patents
Portable comprehensive mechanical demonstrator Download PDFInfo
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- CN104900115A CN104900115A CN201510237212.6A CN201510237212A CN104900115A CN 104900115 A CN104900115 A CN 104900115A CN 201510237212 A CN201510237212 A CN 201510237212A CN 104900115 A CN104900115 A CN 104900115A
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- cylindrical element
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/10—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of solid bodies
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- General Physics & Mathematics (AREA)
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- Mathematical Physics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Algebra (AREA)
- Pure & Applied Mathematics (AREA)
- Educational Administration (AREA)
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- Business, Economics & Management (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The present invention discloses a portable comprehensive mechanical demonstrator which comprises a base (1), a fixed frame (2), a sample rod (3), at least six strain gauges (20), a force applying device, a signal processing circuit for processing the strain gauges (20), a computer and a projection device. The at least six strain gauges (20) are installed on the sample rod (3) and are electrically connected to the input end of the signal processing circuit. The output end of the signal processing circuit is electrically connected to the computer which is electrically connected to the projection device. The fixed frame (2) and the force applying device are installed on the base (1). The force applying device is installed on the fixed frame (2). The lower end of the sample rod (3) is fixed on the base (1). The upper end of the sample rod (3) is fixed on the fixed frame (2). The portable comprehensive mechanical demonstrator can test three forces at the same time and has the advantages of small size and light weight.
Description
Technical field
The present invention relates to mechanical meaurement instructional technology field, is specifically a kind of portable comprehensive mechanics demonstrator.
Background technology
Namely teaching mechanics apparatus is measured and is recorded the instrument of power.Namely or can only survey tensile force and force of compression the mechanics demonstrator of current teaching all can only test a kind of power, or can only survey bending force, or can only survey twisting resistance.If need to survey above-mentioned three kinds of power, then need to carry multiple instrument, inconvenient in the extreme.Meanwhile, the purchase of multiple instrument also greatly can increase the financial burden of school.In addition, above-mentioned mechanics demonstrator also also exists the deficiency that volume is large, quality is heavy.Therefore, for these reasons, urgently need a kind ofly to test three kinds of power and the mechanics demonstrator that volume is little, quality is light, to solve the problem simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of and can test three kinds of power and the portable comprehensive mechanics demonstrator that volume is little, quality is light simultaneously.
Technical scheme of the present invention is, provides a kind of portable comprehensive mechanics demonstrator, comprises base, fixed mount, lining bar, at least six foil gauges, force application apparatus, signal processing circuit, computing machine and projector equipment for the treatment of foil gauge signal; At least six described foil gauges are installed on lining bar; At least six described foil gauges are electrically connected with the input end of signal processing circuit, and the output terminal of described signal processing circuit is electrically connected with computing machine; Described computing machine is also electrically connected with projector equipment; Described fixed mount, force application apparatus are installed on base; Described force application apparatus is also arranged on fixed mount; Described lining bar lower end is fixed on base, and described lining bar upper end is fixed on fixed mount.
Described force application apparatus is made up of moment of torsion generation component, pressure generation component, moment of flexure generation component; Described moment of torsion generation component comprises a fixing fixture block, at least one first twist grip, one cylindrical element and be fixedly mounted on a fixture block of fixing fixture block is arranged on moment of torsion on cylindrical element from lock set; Described moment of torsion also horizontally slips from lock set and is engaged on fixed mount; Described fixing fixture block is arranged on lining bar upper end; The first described twist grip is arranged on fixing fixture block; Described pressure generation component comprises one second twist grip, turning axle and two turning axle fixed blocks be slidably fitted on fixed mount, and described turning axle is rotatably assorted in two turning axle fixed blocks; The second described twist grip is fixed on the upper end of turning axle; The lower end of described turning axle is threaded with cylindrical element; Described moment of flexure generation component comprises one and to be rotatably assorted connection rotating shaft on fixed mount and the 3rd twist grip; One end of described connection rotating shaft is connected with the 3rd twist grip, and the other end of described connection rotating shaft offsets through a turning axle fixed block and turning axle.
Described moment of torsion comprises left and right two pieces of fixed heads, a unilateral bearing and wedge shape limited blocks from lock set; Described unilateral bearing is socketed on cylindrical element; Described unilateral bearing and cylindrical element by wedge shape limited block to limit unilateral bearing and cylindrical element rotates mutually; Two pieces of described fixed heads are a tight fit in outside unilateral bearing; Two pieces of described fixed heads are fixedly connected with by two bolt retainers; Two pieces of described fixed heads also horizontally slip and are engaged on fixed mount.
Described signal processing circuit comprises signal amplifier, microcomputer development plate, the first bridge rectifier circuit, the second bridge rectifier circuit; The first described bridge rectifier circuit, the second bridge rectifier circuit are all electrically connected with signal amplifier, and described signal amplifier is electrically connected with microcomputer development plate.
Described fixed mount comprises four root posts, two crossbeams and two web members; The lower end of described four root posts is fixed on base, and wherein two upper ends in described four root posts are connected with a connection piece, and other two upper ends in described four root posts are connected with another web member; One end of described two crossbeams is connected with a connection piece, and the other end of described two crossbeams is connected with another web member.
After adopting above structure, the present invention compared with prior art, has the following advantages:
During portable comprehensive mechanics demonstrator of the present invention test twisting resistance, only need to pull the first twist grip with hand, fixing fixture block, lining bar and produce twisting resistance can be driven successively.When test tensile force or force of compression, only need torsion second twist grip, driven rotary axle rotates, and makes turning axle and fixed mount fixture block produce acting force and lining bar is out of shape, and then produces tensile force or force of compression.During test bending force, only need rotation the 3rd twist grip, coupling shaft, turning axle fixed mount can be driven to slide and make lining bar be out of shape and produce bending force.The present invention can also install at least six foil gauges on lining bar, and the signal that foil gauge produces is sent to microcomputer development plate by signal processing circuit, simulating signal is converted to digital signal by microcomputer development plate, be sent to PC finally by radio receiving transmitting module to show, thus make teaching more directly perceived.Portable comprehensive mechanics demonstrator of the present invention can carry out the test of twisting resistance, bending force and tensile force and force of compression, therefore only needing to carry an instrument when imparting knowledge to students, facilitating in the extreme.Meanwhile, relative to purchase three instruments, it need buy the effect that just can realize above-mentioned three instruments, thus reduces the financial burden of school.Meanwhile, this instrument also also exists the advantage that volume is little, quality is light.
Accompanying drawing explanation
Fig. 1 is the structural representation of portable comprehensive mechanics demonstrator of the present invention.
Fig. 2 is the detonation configuration schematic diagram of moment of torsion generation component.
Fig. 3 is foil gauge mounting structure schematic diagram.
Fig. 4 is the circuit theory diagrams of the first bridge rectifier circuit.
Fig. 5 is the circuit theory diagrams of the first bridge rectifier circuit.
Fig. 6 is the circuit block diagram of portable comprehensive mechanics demonstrator of the present invention.
Shown in figure 1, base, 2, fixed mount, 2.1, column, 2.2, crossbeam, 2.3, web member, 3, lining bar, 4, fixing fixture block, 4.1, fixture block, the 5, first twist grip, 6, the second twist grip, 7, turning axle, 8, turning axle fixed block, 9, connection rotating shaft, the 10, the 3rd twist grip, 11, stopper slot, 12, cylindrical element, 13, semi-circular hole, 14, fixed head, 15, unilateral bearing, 16, wedge shape limited block, 17, bolt retainer, 18, mounting hole, 19, spacing ring, 20, foil gauge, 21, limited block.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, a kind of portable comprehensive mechanics demonstrator of the present invention, comprises base 1, fixed mount 2, lining bar 3, at least six foil gauges 20, force application apparatus, signal processing circuit, computing machine and projector equipment for the treatment of foil gauge 20 signal; Described at least six foil gauges 20 are installed on lining bar 3; Described at least six foil gauges 20 are electrically connected with the input end of signal processing circuit, and the output terminal of described signal processing circuit is electrically connected with computing machine; Described computing machine is also electrically connected with projector equipment; Described fixed mount 2, force application apparatus are installed on base 1; Described force application apparatus is also arranged on fixed mount 2; Described lining bar 3 lower end is fixed on base 1, and described lining bar 3 upper end is fixed on fixed mount 2.As shown in Figure 3, six foil gauges 20 are respectively Ra, Rb, Rc, Ra at least six foil gauges 20 mounting means on lining bar ', Rb ', Rc ', their resistance is all the same; Angle wherein between Ra, Rc and Rb is 45 degree, and Ra ', angle between Rc ' and Rb ' are 45 degree; Ra, Rb, Rc tri-foil gauges 20 and Ra ', Rb ', Rc ' three foil gauges 20 are symmetrical arranged respectively centered by the axis of lining bar.
Described force application apparatus is made up of moment of torsion generation component, pressure generation component, moment of flexure generation component; Described moment of torsion generation component comprises a fixing fixture block 4, at least one first twist grip 5, is fixedly mounted on cylindrical element on a fixture block 4.1 of fixing fixture block 4 12 and one be arranged on moment of torsion on cylindrical element 12 from lock set, wherein fix fixture block 4 to be made up of two fixture blocks 4.1, one of them fixture block 4.1 is connected with the lower end of cylindrical element 12; Described moment of torsion also horizontally slips from lock set and is engaged on fixed mount 2; Described fixing fixture block 4 is arranged on lining bar 3 upper end, is fixed by two fixture blocks 4.1; The first described twist grip 5 is arranged on fixing fixture block 4, in the present embodiment, has two the first twist grips 5, is arranged on two fixture blocks 4.1 respectively; Described pressure generation component comprises one second twist grip 6, turning axle 7 and two turning axle fixed blocks 8 be slidably fitted on fixed mount 2, and cylindrical element 12 is a cylindrical shaped piece, and inside is provided with a through hole be threaded with the lower end of turning axle 7; In the present embodiment, two turning axle fixed blocks 8 are slidably fitted on two crossbeams 2.2; Described turning axle 7 is rotatably assorted in two turning axle fixed blocks 8, in the present embodiment, two turning axle fixed blocks 8 is respectively equipped with two relative semi-circular hole 13, and turning axle 7 is provided with and is rotatably assorted in two semi-circular hole 13; The second described twist grip 6 is fixed on the upper end of turning axle 7; The lower end of described turning axle 7 is threaded with cylindrical element 12, and namely the lower end of turning axle 7 can screw in the through hole of cylindrical element 12; Described moment of flexure generation component comprises one and to be rotatably assorted connection rotating shaft 9 on fixed mount 2 and the 3rd twist grip 10; One end of described connection rotating shaft 9 is connected with the 3rd twist grip 10, and the other end of described connection rotating shaft 9 offsets with turning axle 7 through a turning axle fixed block 8.Wherein, lining bar 3 is commercially available nylon rod.
Described moment of torsion comprises two pieces of fixed head 14, unilateral bearings 15 in left and right and a wedge shape limited block 16 from lock set; Described unilateral bearing 15 is socketed on cylindrical element 12; Described unilateral bearing 15 is rotated with cylindrical element 12 to limit unilateral bearing 15 by wedge shape limited block 16 mutually with cylindrical element 12, namely unilateral bearing 15 and cylindrical element 12 are equipped with two holes embedded for wedge shape limited block 16, and described wedge shape limited block 16 is embedded in hole; Two pieces of described fixed heads 14 are a tight fit in outside unilateral bearing 15, namely two pieces of fixed blocks 14 are respectively provided with a semicircular indentations, two semicircular indentations can coordinate clamping unilateral bearing jointly, unilateral bearing 15 outside is provided with limited block 21 simultaneously, be provided with stopper slot 11 in semicircular indentations, described limited block 21 is embedded in stopper slot 11; Two pieces of described fixed heads 14 are fixedly connected with by two bolt retainers 17; Two pieces of described fixed heads 14 also horizontally slip and are engaged on fixed mount 2, in the present embodiment, two pieces of fixed heads 14 are respectively equipped with two mounting holes 18, four root posts 2.1 are slidably fitted in four mounting holes 18 respectively, each column 2.1 be positioned at below mounting hole 18 is also provided with a spacing ring 19, with to preventing two pieces of fixed heads 14 from falling.
As shown in Fig. 4, Fig. 5, Fig. 6, described signal processing circuit comprises signal amplifier, microcomputer development plate, the first bridge rectifier circuit, the second bridge rectifier circuit; The first described bridge rectifier circuit, the second bridge rectifier circuit are all electrically connected with signal amplifier, and described signal amplifier is electrically connected with microcomputer development plate.First bridge rectifier circuit, the second bridge rectifier circuit are respectively shown in Fig. 4, Fig. 5.Signal amplifier and microcomputer development plate are commercially available prod.
Described fixed mount 2 comprises four root posts, 2.1, two crossbeams 2.2 and two web members 2.3; The lower end of described four root posts 2.1 is fixed on base 1, and wherein two upper ends in described four root posts 2.1 are connected with a connection piece 2.3, and other two upper ends in described four root posts 2.1 are connected with another web member 2.3; One end of described two crossbeams 2.2 is connected with a connection piece 2.3, and the other end of described two crossbeams 2.2 is connected with another web member 2.3.
Below only just most preferred embodiment of the present invention is described, but can not be interpreted as it is limitations on claims.The present invention is not limited only to above embodiment, and its concrete structure allows to change.In every case the various change done in the protection domain of independent claims of the present invention is all in protection scope of the present invention.
Claims (5)
1. a portable comprehensive mechanics demonstrator, is characterized in that: comprise base (1), fixed mount (2), lining bar (3), at least six foil gauges (20), force application apparatus, signal processing circuit, computing machine and projector equipment for the treatment of foil gauge (20) signal; Described at least six foil gauges (20) are installed on lining bar (3); Described at least six foil gauges (20) are electrically connected with the input end of signal processing circuit, and the output terminal of described signal processing circuit is electrically connected with computing machine; Described computing machine is also electrically connected with projector equipment; Described fixed mount (2), force application apparatus are installed on base (1); Described force application apparatus is also arranged on fixed mount (2); Described lining bar (3) lower end is fixed on base (1), and described lining bar (3) upper end is fixed on fixed mount (2).
2. portable comprehensive mechanics demonstrator according to claim 1, is characterized in that: described force application apparatus is made up of moment of torsion generation component, pressure generation component, moment of flexure generation component; Described moment of torsion generation component comprises a fixing fixture block (4), at least one first twist grip (5), one cylindrical element (12) and be fixedly mounted on a fixture block (4.1) of fixing fixture block (4) is arranged on moment of torsion on cylindrical element (12) from lock set; Described moment of torsion also horizontally slips from lock set and is engaged on fixed mount (2); Described fixing fixture block (4) is arranged on lining bar (3) upper end; Described the first twist grip (5) is arranged on fixing fixture block (4); Described pressure generation component comprises one second twist grip (6), turning axle (7) and two turning axle fixed blocks (8) be slidably fitted on fixed mount (2), and described turning axle (7) is rotatably assorted in two turning axle fixed blocks (8); Described the second twist grip (6) is fixed on the upper end of turning axle (7); The lower end of described turning axle (7) is threaded with cylindrical element (12); Described moment of flexure generation component comprises one and to be rotatably assorted connection rotating shaft (9) on fixed mount (2) and the 3rd twist grip (10); One end of described connection rotating shaft (9) is connected with the 3rd twist grip (10), and the other end of described connection rotating shaft (9) offsets through a turning axle fixed block (8) and turning axle (7).
3. portable comprehensive mechanics demonstrator according to claim 2, is characterized in that: described moment of torsion comprises left and right two pieces of fixed heads (14), a unilateral bearing (15) and wedge shape limited blocks (16) from lock set; Described unilateral bearing (15) is socketed on cylindrical element (12); Described unilateral bearing (15) is rotated with cylindrical element (12) to limit unilateral bearing (15) by wedge shape limited block (16) mutually with cylindrical element (12); Two pieces of described fixed heads (14) are a tight fit in unilateral bearing (15) outward; Two pieces of described fixed heads (14) are fixedly connected with by two bolt retainers (17); Two pieces of described fixed heads (14) also horizontally slip and are engaged on fixed mount (2).
4. portable comprehensive mechanics demonstrator according to claim 1, is characterized in that: described signal processing circuit comprises signal amplifier, microcomputer development plate, the first bridge rectifier circuit, the second bridge rectifier circuit; The first described bridge rectifier circuit, the second bridge rectifier circuit are all electrically connected with signal amplifier, and described signal amplifier is electrically connected with microcomputer development plate.
5. portable comprehensive mechanics demonstrator according to claim 1, is characterized in that: described fixed mount (2) comprises four root posts (2.1), two crossbeams (2.2) and two web members (2.3); The lower end of described four root posts (2.1) is fixed on base (1), wherein two upper ends in described four root posts (2.1) are connected with a connection piece (2.3), and other two upper ends in described four root posts (2.1) are connected with another web member (2.3); One end of described two crossbeams (2.2) is connected with a connection piece (2.3), and the other end of described two crossbeams (2.2) is connected with another web member (2.3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237212.6A CN104900115B (en) | 2015-05-12 | 2015-05-12 | Portable comprehensive mechanics demonstrator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237212.6A CN104900115B (en) | 2015-05-12 | 2015-05-12 | Portable comprehensive mechanics demonstrator |
Publications (2)
| Publication Number | Publication Date |
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| CN104900115A true CN104900115A (en) | 2015-09-09 |
| CN104900115B CN104900115B (en) | 2017-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510237212.6A Expired - Fee Related CN104900115B (en) | 2015-05-12 | 2015-05-12 | Portable comprehensive mechanics demonstrator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106225633A (en) * | 2016-08-30 | 2016-12-14 | 苏州华宇精密铸造有限公司 | A kind of metering device for the assembling of turbine blade seat |
| CN106952563A (en) * | 2017-05-16 | 2017-07-14 | 重庆科技学院 | A kind of antitorque teaching demonstration device of steel member |
| CN112834324A (en) * | 2021-01-11 | 2021-05-25 | 武汉科技大学 | Portable tension-compression-shear stress applying device |
| CN117826945A (en) * | 2023-02-21 | 2024-04-05 | 千目(山东)网络信息科技有限公司 | Computer machine case convenient to installation |
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| RU2052218C1 (en) * | 1990-12-19 | 1996-01-10 | Серпуховское высшее военное командно-инженерное училище ракетных войск им.Ленинского комсомола | Structural mechanics educational aid |
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| CN106225633A (en) * | 2016-08-30 | 2016-12-14 | 苏州华宇精密铸造有限公司 | A kind of metering device for the assembling of turbine blade seat |
| CN106952563A (en) * | 2017-05-16 | 2017-07-14 | 重庆科技学院 | A kind of antitorque teaching demonstration device of steel member |
| CN112834324A (en) * | 2021-01-11 | 2021-05-25 | 武汉科技大学 | Portable tension-compression-shear stress applying device |
| CN117826945A (en) * | 2023-02-21 | 2024-04-05 | 千目(山东)网络信息科技有限公司 | Computer machine case convenient to installation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104900115B (en) | 2017-07-07 |
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