CN106769416A - Portable crankling vibration test instrument - Google Patents

Abstract

Portable crankling vibration test instrument, its composition includes the flexibility experimental facilities of measurement experiment material and measurement experiment material twist two parts.Two kinds of experiments are all to provide power using stepper motor, are transmitted by transmission device, by two The gear deceleration speed devices.Rotated in screw shell by leading screw when doing crooked experiment, drive bending detecting head to travel forward, and applying power is carried out to crooked experiment test specimen, and it is more long over time, and the flexural deformation of crooked experiment test specimen is bigger, and applying power is also bigger；When torsion test is done, gear wheel slowly rotates to make it produce deformation, then the moment of torsion for directly measuring test specimen diverse location by torque sensor.The present invention is workable, has a wide range of application, and cheap, substantially increases the precision of measurement bending experiment.

Description

Portable Bending-Torsion Combined Tester

technical field

The invention belongs to the field of instruments for measuring the mechanical properties of materials, and in particular relates to a portable bending-torsion combination tester.

Background technique

Bending refers to the degree of bending of long strips (types, rods, pipes) in the length direction. The bending chord height per meter of length is the bending degree per meter; the ratio of the total bending chord height to the total length of the total length is the total bending degree. The bending test and torsion test of mechanical materials are the basic test methods of material performance. At present, the test instruments actually used in the market can be divided into bending test instruments and torsion test instruments according to their measurement methods, and the two instruments exist independently. The bending test is usually embedded in the function of the universal testing machine, resulting in a very expensive price. There are also individual combined test benches, which only accumulate material mechanics experimental devices and require multiple loading devices. The disadvantages are very obvious, the structure is messy and not compact, and the fuselage is heavy, which seriously wastes the experimental site and purchase funds.

According to relevant literature reports, the conventional force-applying device for measuring strength and torsion test benches is bulky, only by moving the probe head to change the force-applying point, and the shape of the object that can be measured is single, so it is necessary to redesign a convenient bending device. Torsion combination test equipment. For example, the patent publication number CN201020613430 "Multifunctional Material Mechanics Experimental Device" discloses a multifunctional material mechanical experimental device, a 7-shaped loading column is connected to the universal base, and the top of the 7-shaped loading column is pressed into the guide nut sleeve. The loading screw is threadedly connected to the guide nut sleeve, the upper end of the loading screw is fixedly connected to the hand wheel, the lower end of the loading screw is slidingly connected to the pressure sensor plane, and the lower end of the pressure sensor is connected to the pressure round head. The force applying device relies on manpower, and the applied force is very small. It can only be used for students' theoretical experiments, and cannot measure large experimental pieces, and has a single function. For example, the "bending and torsion combined testing machine" with the patent publication number CN105319135A discloses a device that uses a screw to change the force point of the probe head. Its structure uses a fixed screw and a nut pair to drive the parallel slides fixed on the nut to move. , apply a bending force to the specimen, and at the same time adjust the position of the force application point acting on the specimen through another screw and nut pair perpendicular to it, and measure the force acting on the specimen with a pressure sensor and a displacement sensor and the amount of deformation produced by the specimen. When doing torsion experiments, bevel gears are used to drive, the load is low, it is difficult to do experiments that require force, and the structure is bulky. Another example is the patent publication number CN200620153488, which discloses a material mechanics combination test bench for a bridge beam structure, which is composed of a main girder, a long girder, and a short girder. The pedestal of the structure, the I and II columns are vertically connected to the two ends of the main beam, and the top of the two columns is fixed to the square beam to form a bridge beam structure. , on the side of the main beam opposite to the short beam, the top surface of the large tube of the I column is connected to the stress analysis experimental device of the combined bending and torsion deformation of the circular tube Beam experimental device, experimental device for tension and compression rods on short-branched beams, and experimental device for measuring pure bending normal stress on long-branched beams and straight beams. Its structure is complicated, the volume is bulky, and the force that can be applied is small. The measuring point is changed by changing the position of the measuring probe. The lifting device is complicated and the accuracy is not high.

To sum up, it is impossible to accurately measure the bending moment and torque of the experimental material by using the existing combined bending and torsion experimental equipment, and the volume and price of the experimental equipment cannot be reasonable. Therefore, it is necessary to design a cheap and convenient bending-torsion combination tester.

Contents of the invention

The object of the present invention is to provide a portable bending-torsion combined tester that solves the above-mentioned practical and theoretical problems.

Portable bending and twisting combination tester, its composition includes: asynchronous motor, bending mechanism transmission device, rotating bracket, test bench base, base bracket, bending mechanism small coupling, bending mechanism driving gear, bending mechanism driven gear, bending mechanism Large coupling, threaded sleeve bracket, threaded sleeve, lead screw, bending mechanism fixture, sliding guide rail, bending test specimen, displacement sensor, bending mechanism fixing plate, bending mechanism probe head, stress sensor, torsion mechanism fixing plate , the first fixture of the torsion mechanism, the torsion experiment specimen, the torque sensor, the display screen, the display screen pillar, the second clamp of the torsion mechanism, the driven gear of the torsion mechanism, the driving gear of the torsion mechanism, the small coupling of the torsion mechanism, the torsion Mechanism transmission device, upward concave block, clamping bolt, pillar, clamping nut, downward concave type block, clamp chassis and large coupling of torsion mechanism; the bending mechanism transmission device is connected with the output shaft of the asynchronous motor; the The lower part of the left end of the bending mechanism transmission device is provided with a rotating bracket; the rotating bracket is fixed on the base of the test bench; the left end of the bending mechanism transmission device is connected with the small coupling of the bending mechanism; the small coupling of the bending mechanism is provided with The driving gear of the bending mechanism; the large coupling of the bending mechanism is provided with a driven gear of the bending mechanism; the driving gear of the bending is meshed with the driven gear of the bending mechanism; the large coupling of the bending mechanism is provided with a screw; The outside of the screw is provided with a threaded sleeve, and is threadedly connected with the threaded sleeve: the two sides of the lower end of the threaded sleeve are respectively provided with a threaded sleeve support; the end of the screw is provided with a stress sensor; the stress sensor A bending mechanism detection head is arranged on it; the bending mechanism fixing plate is fixed on the upper left of the base of the test bench; the bending mechanism fixing plate is provided with a sliding guide rail; the two ends of the sliding guide rail are respectively provided with bending mechanism clamps, A bending test piece is arranged between the bending mechanism fixtures at both ends; a displacement sensor is arranged on the bending test piece; a torsion mechanism fixing plate is set on the upper right of the base of the test bench; a torsion mechanism fixing plate is set on the torsion mechanism fixing plate There is a first fixture of the twisting mechanism; one end of the torsion experiment specimen is connected to the first fixture of the torsion, and the other end is connected to the second fixture of the torsion mechanism; a torsion sensor is arranged on the torsion experiment specimen; The right side of the sensor is provided with a display screen; the lower end of the display screen is provided with a display screen pillar; the second fixture of the torsion mechanism includes an upper concave block, a clamping bolt, a pillar, a clamping nut, a lower concave block and a clamp chassis; The upper concave block is fixed on the fixture chassis, the two ends of the upper concave block and the lower concave block are respectively fixed by clamping bolts, and the lower parts of the clamping bolts at both ends are respectively provided with clamping nuts; the lower end of the clamp chassis is provided with The pillar is fixed on the base of the test bench; the large coupling of the torsion mechanism is connected to the chassis of the fixture; the front end of the large coupling of the torsion mechanism is provided with a driven gear of the torsion mechanism; the transmission device of the torsion mechanism One end is connected with the output shaft of the asynchronous motor, and the other end is connected with the output shaft of the small coupling of the torsion mechanism; the small coupling of the torsion mechanism is provided with a driving gear of the torsion mechanism; the driven gear of the torsion mechanism is connected with the torsion mechanism The driving gear of the mechanism is meshed and connected; the fixtures of the bending mechanism, the first fixture of the twisting mechanism, and the second fixture of the twisting mechanism have the same structure.

Preferably, base brackets are provided at the four bottom corners of the lower surface of the test bench base.

Preferably, the number of teeth of the driving gear of the bending mechanism is set to 20, and the width is 20 mm.

Preferably, the number of teeth of the driven gear of the bending mechanism is set to 80, and the width is 40 mm.

Preferably, the number of teeth of the driven gear of the torsion mechanism is set to 100, and the width is 20 mm.

Preferably, the number of teeth of the driving gear of the torsion mechanism is set to 20, and the width is 20 mm.

Compared with prior art, the beneficial effect of the present invention is:

Portable bending and torsion combined tester with reasonable and practical structure design. The ratio of the number of teeth of the bending mechanism driving gear to the bending driven gear is 1:4, which greatly slows down the rotation rate of the lead screw and improves the measurement accuracy when doing bending experiments. Through the movement of the fixture of the bending mechanism on the sliding guide rail, It can measure the experimental data of simply supported beams, cantilever beams, and outrigger beams of experimental specimens. The ratio of the number of teeth of the torsion driving gear to the torsion driven gear is 1:5, which greatly improves the accuracy of the data when doing torsion experiments. Through the movement of the torque sensor, the torque of each part of the test piece can be measured, and the torque of workpieces of various shapes can be measured through the design of the torsion test fixture. Therefore, the device has strong operability, wide application range and low price, which greatly improves the accuracy of bending and twisting experiments.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is an enlarged view of the second clamp of the torsion mechanism;

Among them: 1 is the asynchronous motor, 2 is the transmission device of the bending mechanism, 3 is the rotating bracket, 4 is the base of the test bench, 5 is the base support, 6 is the small coupling of the bending mechanism, 7 is the driving gear of the bending mechanism, and 8 is the bending mechanism Driven gear, 9 is the large coupling of the bending mechanism, 10 is the threaded sleeve bracket, 11 is the threaded sleeve, 12 is the lead screw, 13 is the fixture of the bending mechanism, 14 is the sliding guide rail, 15 is the bending test specimen, 16 is the displacement sensor, 17 is the fixing plate of the bending mechanism, 18 is the detection head of the bending mechanism, 19 is the stress sensor, 20 is the fixing plate of the torsion mechanism, 21 is the first fixture of the torsion mechanism, 22 is the torsion experiment specimen, 23 is the torque Sensor, 24 is a display screen, 25 is a display screen pillar, 26 is the second card of the torsion mechanism, 27 is the driven gear of the torsion mechanism, 28 is the driving gear of the torsion mechanism, 29 is the small shaft coupling of the torsion mechanism, and 30 is torsion Mechanism transmission device, 31 is the concave block, 32 is the clamp bolt, 33 is the pillar, 34 is the clamp nut, 35 is the concave block, 36 is the clamp chassis, and 37 is the large shaft coupling of the torsion mechanism.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of the invention.

Portable bending and torsion combination tester, the bending mechanism transmission device 2 is connected with the output shaft of the asynchronous motor 1; the lower part of the left end of the bending mechanism transmission device 2 is provided with a rotating bracket 3; the rotating bracket 3 is fixed on the base 4 of the test bench; the bending mechanism The left end of the transmission device 2 is connected with the small coupling 6 of the bending mechanism; the small coupling 6 of the bending mechanism is provided with the driving gear 7 of the bending mechanism; the large coupling 9 of the bending mechanism is provided with the driven gear 8 of the bending mechanism; The gear 7 is meshed with the driven gear 8 of the bending mechanism; the large coupling 9 of the bending mechanism is provided with a lead screw 12; the outside of the lead screw 12 is provided with a threaded sleeve 11, and is threadedly connected with the threaded sleeve 11: the threaded sleeve 11. Threaded sleeve brackets 10 are respectively provided on both sides of the lower end; a stress sensor 19 is provided at the end of the lead screw 12; a bending mechanism detection head 18 is arranged on the stress sensor 19; a bending mechanism fixing plate 17 is fixed on the upper left of the base 4 of the test bench 17 on the fixed plate of the bending mechanism is provided with a sliding guide rail 14; the two ends of the sliding guide rail 14 are respectively provided with a bending mechanism fixture 13, and a bending experiment specimen 15 is arranged between the bending mechanism fixture 13 at both ends; A displacement sensor 16 is provided; a torsion mechanism fixing plate 20 is arranged on the upper right of the test bench base 4; a torsion mechanism fixing plate 20 is provided with a torsion mechanism first jig 21; one end of the torsion experiment specimen 22 is connected to the torsion first jig 21 Connect, the other end is connected with the second jig 26 of the torsion mechanism; a torsion sensor 23 is arranged on the torsion experiment specimen 22; a display screen 24 is provided on the right side of the torsion sensor 23; a display screen pillar 25 is provided at the lower end of the display screen 24; Mechanism second jig 26 comprises upper concave block 31, clamping bolt 32, pillar 33, clamping nut 34, lower concave block 35 and clamp chassis 36; Upper concave block 31 is fixed on the clamp chassis 36, and upper concave block 31 and the two ends of the concave block 35 are respectively fixed by clamping bolts 32, and the lower parts of the clamping bolts 34 at both ends are respectively provided with clamping nuts 34; Above: the large coupling 37 of the twisting mechanism is connected with the fixture chassis 36; the front end of the large coupling 37 of the twisting mechanism is provided with the driven gear 27 of the twisting mechanism; one end of the transmission device 30 of the twisting mechanism is connected with the output shaft of the asynchronous motor 1 , the other end is connected with the output shaft of the small shaft coupling 29 of the twisting mechanism; the small coupling 29 of the twisting mechanism is provided with a driving gear 28 of the twisting mechanism; the driven gear 27 of the twisting mechanism is meshed with the driving gear 28 of the twisting mechanism; the bending mechanism The jig 13 and the first jig 21 of the torsion mechanism and the second jig 26 of the torsion mechanism have the same structure; the four bottom corners of the lower surface of the test bench base 4 are provided with a base bracket 5; the number of teeth of the bending mechanism driving gear 7 is set is 20, and the width is 20mm; the number of teeth of the driven gear 8 of the bending mechanism is set to 80, and the width is 40mm; the number of teeth of the driven gear 27 of the twist mechanism is set to 100, and the width is 20mm; the number of teeth of the driving gear 28 of the twist mechanism is set to 20, The width is 20mm.

Working principle: when doing the torsion test, first clamp the torsion test piece 22 on the test bench with the first torsion fixture 21 and the second torsion fixture 26, and place the torque sensor 24 on the torsion test piece 22, Turn on the display screen 24, and then turn on the asynchronous motor 1, so that it drives the twist driving gear 28 to rotate through the twist transmission device 30, and the twist driven gear 27 is slowly driven by the twist driving gear 28, so that the twist experiment specimen 22 is slightly rotated, and then observed The display screen 24 records the data of the torque, and the position of the torque sensor 23 can also be changed to record the data of the torque multiple times. When doing a bending test, when making a simply supported beam, first remove the torsion transmission device 30, clamp the two ends of the bending test piece 15 with the bending fixture 13, place the displacement sensor 16 on the bending test piece 15, and then open the asynchronous The motor 1 drives the bending driving gear 7 to rotate through the bending transmission device 2, and the bending driving gear 7 slowly drives the bending driven gear 8, and then the bending driven gear 8 drives the screw rod 12 to rotate. Turning in 11 will make it move forward, so that the bending mechanism probe head 18 applies force to the 15 pieces of the bending test piece, and as time goes on, the bending deformation of the bending test piece 15 is greater, and the applied force is also greater. The operator can apply force according to his actual situation; when making a cantilever beam, only one bending fixture 13 needs to be removed, and only one bending fixture 13 is used to clamp the bending test specimen 15, and then the above experimental steps are repeated; When the beam is used, it is only necessary to clamp one end of the bending test specimen 15 with two bending fixtures 13, and then repeat the above experimental steps.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. portable crankling vibration test instrument, its composition includes：Asynchronous motor（1）, bending mechanism conveyer（2）, rotate Support（3）, testing stand substrate（4）, base support（5）, the small shaft coupling of bending mechanism（6）, bending mechanism driving gear（7）, it is curved Bent mechanism's driven gear（8）, the big shaft coupling of bending mechanism（9）, screw shell support（10）, screw shell（11）, leading screw（12）、 Bending mechanism fixture（13）, rail plate（14）, crooked experiment test specimen（15）, displacement transducer（16）, bending mechanism fixed plate （17）, bending mechanism detecting head（18）, strain gauge（19）, twist mechanism fixed plate（20）, the fixture of twist mechanism first （21）, torsion test test specimen（22）, torque sensor（23）, display screen（24）, display screen pillar（25）, the card of twist mechanism the two Tool（26）, twist mechanism driven gear（27）, twist mechanism active moving gear（28）, the small shaft coupling of twist mechanism（29）, reverse Mechanism's conveyer（30）, upper matrix block（31）, clamping bolt（32）, pillar（33）, clamping nut（34）, concave shape block （35）, fixture chassis（36）With the big shaft coupling of twist mechanism（37）；It is characterized in that：The bending mechanism conveyer（2）With Asynchronous machine（1）Output shaft be connected；The bending mechanism conveyer（2）Left end bottom is provided with swinging mounting（3）；Institute State swinging mounting（3）It is fixed on experimental bench substrate（4）On；The bending mechanism conveyer（2）Left end is small with bending mechanism Axle device（6）It is connected；The small shaft coupling of bending mechanism（6）On be provided with bending mechanism driving gear（7）；The bending mechanism Big shaft coupling（9）On be provided with bending mechanism driven gear（8）；The bending driving gear（7）With bending mechanism driven gear （8）Engagement connection；The big shaft coupling of bending mechanism（9）On be provided with leading screw（12）；The leading screw（12）Outside be provided with Screw shell（11）, and and screw shell（11）Threaded connection：The screw shell（11）Lower end both sides are respectively arranged with screw thread Bush support（10）；The leading screw（12）End is provided with strain gauge（19）；The strain gauge（19）On be provided with Bending mechanism detecting head（18）；In the bending mechanism fixed plate（17）It is fixed on experimental bench substrate（4）Upper left side；It is described curved In bent mechanism's fixed plate（17）It is provided with rail plate（14）；The rail plate（14）Two ends are respectively arranged with bending mechanism card Tool（13）, the bending mechanism fixture at two ends（13）Between be provided with crooked experiment test specimen（15）；The crooked experiment test specimen（15） On be provided with displacement transducer（16）；The testing stand substrate（4）Upper right side be provided with twist mechanism fixed plate（20）；It is described Twist mechanism fixed plate（20）On be provided with the fixture of twist mechanism first（21）；The torsion test test specimen（22）One end and torsion First fixture（21）Connection, the other end and the fixture of twist mechanism second（26）It is connected；The torsion test test specimen（22）On set It is equipped with torsion sensor（23）；The torsion sensor（23）Right side is provided with display screen（24）；The display screen（24）Lower end It is provided with display screen pillar（25）；The fixture of the twist mechanism second（26）Including：Upper matrix block（31）, clamping bolt（32）、 Pillar（33）, clamping nut（34）, concave shape block（35）With fixture chassis（36）；The upper matrix block（31）It is fixed on fixture bottom Disk（36）On, upper matrix block（31）With concave shape block（35）Two ends respectively pass through clamping bolt（32）It is fixed, the clamping at two ends Bolt（34）Bottom is respectively arranged with clamping nut（34）；The fixture chassis（36）Lower end is provided with pillar（33）, pillar （33）It is fixed on testing stand substrate（4）On；The big shaft coupling of twist mechanism（37）With fixture chassis（36）It is connected；The torsion The big shaft coupling of rotation mechanism（37）Front end be provided with twist mechanism driven gear（27）；The twist mechanism conveyer（30）'s One end and asynchronous machine（1）Output shaft connection, the other end and the small shaft coupling of twist mechanism（29）Output shaft be connected；It is described The small shaft coupling of twist mechanism（29）On be provided with twist mechanism driving gear（28）；The twist mechanism driven gear（27）With torsion Rotation mechanism driving gear（28）Engagement connection；The bending mechanism fixture（13）With the fixture of twist mechanism first（21）And twist machine The fixture of structure second（26）Structure is identical.

2. portable crankling vibration test instrument according to claim 1, it is characterised in that：The testing stand substrate（4）'s Base support is provided with four base angles of lower surface（5）.

3. portable crankling vibration test instrument according to claim 1, it is characterised in that：The bending mechanism driving gear （7）The number of teeth be set to 20, width is 20mm.

4. portable crankling vibration test instrument according to claim 1, it is characterised in that：The bending mechanism driven gear （8）The number of teeth be set to 80, width is 40mm.

5. portable crankling vibration test instrument according to claim 1, it is characterised in that：The twist mechanism driven gear （27）The number of teeth be set to 100, width is 20mm.

6. portable crankling vibration test instrument according to claim 1, it is characterised in that：The twist mechanism driving gear （28）The number of teeth be set to 20, width is 20mm.