CN104568575B - Force-applying push rod device and multi-axial load loading machine - Google Patents

Force-applying push rod device and multi-axial load loading machine Download PDF

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Publication number
CN104568575B
CN104568575B CN201510016485.8A CN201510016485A CN104568575B CN 104568575 B CN104568575 B CN 104568575B CN 201510016485 A CN201510016485 A CN 201510016485A CN 104568575 B CN104568575 B CN 104568575B
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force
push rod
semiaxis
pedestal
moment
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CN104568575A (en
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李霞
李强
刘文涛
孙泽明
代记涛
郭强
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Harbin Engineering University
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Harbin Engineering University
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Abstract

The invention provides a force-applying push rod device and a multi-axial load loading machine. The force-applying push rod device comprises a base, a servo motor mounted on the end part of the base, a guide rail mounted on the base, and a lead screw mounted on the base by virtue of a connection plate, wherein a driving wheel is mounted on an output shaft of the servo motor; a driven wheel is mounted on the lead screw; a conveying belt is arranged between the driving wheel and the driven wheel in a sleeving manner; the lead screw is matched with an upper sliding block with an inner threaded hole in the center; the upper sliding block is mounted on the guide rail; the end part of the upper sliding block is fixedly connected with one end of a pulling and pressing spring; the other end of the pulling and pressing spring is fixedly connected with one end of a lower sliding block through a connection shaft; the other end of the lower sliding block is connected with one end of a force sensor by virtue of an upper joint bearing; the other end of the force sensor is connected with one end of a lower joint bearing; the other end of the lower joint bearing is connected with a force applying head; the force applying head is in contact with a tested material. The force-applying push rod device can be used for accurately loading multi-axial force moment or force to a loaded part, and has the characteristics of convenience in operation and accuracy in force application.

Description

A kind of force push rod device and multiaxial loading load machine
Technical field
The present invention relates to a kind of loading machine, more particularly, to a kind of force push rod device and multiaxial loading load machine.
Background technology
Material Testing Machine is widely used in metallurgy, machinery, chemical industry, automobile, aviation, boat as the important test apparatus of a class The application of the industry-by-industry such as it, especially electronic type universal material testing machine is more universal.Existing load loads machine and also deposits at present In problems with:1st, can be only done the loading of single shaft, test process needs clamping repeatedly, just can complete to different directions Load, testing efficiency is low.2nd, the load mode of existing loading machine is single, and the power that can be only done loads or can be only done moment and loads, The requirement that power loads and moment loads cannot be met simultaneously.3rd, testing machine stiffness by itself is low, loading range limited it is impossible to meet right Big rigid material loads demand.4th, testing machine loading accuracy is low, and loaded value error is big it is impossible to high accuracy loads.
Chinese patent (application number 201310487294.0) provide a kind of static pressure Axial and radial load maintainer, this mechanism mainly by Pedestal, displacement output mechanism, pressure output mechanism and load measurement mechanism composition, described displacement output mechanism is included with T-shaped The eccentric wheel motor platform of groove, be fixed on motor platform and can along the servomotor of T-slot adjusting position, be arranged on servomotor The decelerator of output shaft, it is fixed on the eccentric wheel of reducer output shaft, described pressure output mechanism includes being arranged in chute can Slip loose piece I slidably and slip loose piece II, two springs being clipped between two slip loose pieces, described load measurement machine Lower and upper parts of bearing fixing sleeve that structure includes being arranged on load measurement mechanism chute, it is fixed under bearing fixing sleeve The pressure sensor of half portion, the various radial loads that Hydrostatic Bearing System bears can only be simulated by this mechanism.
Content of the invention
The invention aims to making the loading accuracy height to material, Multi-axial Loading being completed and provide a kind of force Push rod device and multiaxial loading load machine.
The object of the present invention is achieved like this:A kind of force push rod device, including pedestal, is arranged on watching of base ends Take motor, the guide rail being arranged on pedestal and the leading screw being arranged on pedestal, the output shaft of described servomotor by connecting plate Driving wheel is installed, driven pulley installed by leading screw, between driving wheel and driven pulley, be set with conveyer belt, leading screw and center have internal thread The top shoe in hole coordinates and top shoe is arranged on guide rail, and the end of top shoe is fixedly connected with one end of drawing-pressing spring, tension and compression The other end of spring is fixedly connected with one end of sliding block by connecting shaft, and the other end of sliding block passes through upper joint bearing and power One end of sensor connects, and the other end of force snesor is connected with one end of ShiShimonoseki bearings, the other end of ShiShimonoseki bearings and Force head connects, and force head is contacted with measured material;
Multiaxial loading loads machine, and including lathe bed support section, moment loading section and clamping part, lathe bed support section is The flame frame construction being made up of base, crossbeam and two crossbeam pillars, clamping part includes the work being arranged on base Platform and the fixture for clamping measured material, there is ladder chute the upper surface of described workbench, and described moment loading section includes Athwartship moment transmitting device and three described force push rod device, described athwartship moment transmitting device includes torsion sleeve, upper semiaxis With lower semiaxis, torsion sleeve and upper semiaxis passed through spline connection, connected by sliding cross coupling between upper semiaxis and lower semiaxis, On upper semiaxis, suit arranges one-to-one bearing between swivel head, and upper semiaxis and rotary shaft, and the bottom of lower semiaxis is passed with moment of torsion Sensor connects, and the bottom of torque sensor is connected with loading moment head, the connected lateral bracket in rear end of swivel head, and the first force pushes away Lever apparatus and the second force push rod device are fixedly mounted on straight down in lateral bracket respectively and are symmetrically distributed in by pedestal The both sides of swivel head, fixedly mount moment device pedestal on described crossbeam, and the 3rd force push rod device horizontal cross is arranged on On moment device pedestal, the centre position of described crossbeam is provided with through hole, and torsion sleeve is inserted described through hole and passed through No. two bearings It is connected with crossbeam, the arm of force and the hypozygal bearing hinge connection of the 3rd force push rod device are passed through in the upper end of torsion sleeve;Described first applies Push lever apparatus, the second force push rod device and the 3rd force push rod device all to include pedestal, be arranged on the servo of base ends Motor, the guide rail being arranged on pedestal and the leading screw being arranged on by connecting plate on pedestal, the output shaft peace of described servomotor Dress driving wheel, driven pulley installed by leading screw, is set with conveyer belt between driving wheel and driven pulley, and leading screw and center have internal thread hole Top shoe cooperation and top shoe be arranged on guide rail, the end of top shoe is fixedly connected with one end of drawing-pressing spring, tension and compression bullet The other end of spring is fixedly connected with one end of sliding block by connecting shaft, and the other end of sliding block is passed through upper joint bearing and passed with power One end of sensor connects, and the other end of force snesor is connected with one end of ShiShimonoseki bearings, the first force push rod device and second The other end of ShiShimonoseki bearings of force push rod device is connected with force head, and force head is contacted with measured material, and the 3rd force pushes away ShiShimonoseki bearings of lever apparatus are hinged with the arm of force.
Compared with prior art, the invention has the beneficial effects as follows:A kind of force push rod device, can complete material is applied Power loads, and steadily, precision and life-span all get a promotion, by making the stress that can make force snesor by the drawing-pressing spring of setting With a pair of oscillating bearing (upper joint bearing and ShiShimonoseki bearings), can avoid between material and force push rod device due to installing The error that exists or load error impact that power is loaded between axis, namely additional moment load can be eliminated so that power The power that sensor measures is more accurate;Multi-axis high-precision load loads machine, solves cannot to realize Multi-axial Loading, only in prior art The power that can complete loads or moment loads, loads the problem that machine rigidity is low, loading accuracy is low, and the present invention can to measured material respectively Carry out the moment loading around three directions of X, Y, Z axis and the power along the axial direction of Z axis load, the described force push rod device of application, Load is lifted by structures such as sliding cross coupling, oscillating bearing, force snesor, torque sensor, springs and loads adding of machine Carry precision, realize high accuracy and load.
Brief description
Fig. 1 is the force push rod device structural representation of the present invention;
Fig. 2 is the structural representation of the Multi-axis high-precision load loading machine of the present invention;
Fig. 3 is the lathe bed support section schematic diagram of the Multi-axis high-precision load loading machine of the present invention;
Fig. 4 is the moment loading section schematic diagram of the Multi-axis high-precision load loading machine of the present invention;
Fig. 5 is the structural representation of the athwartship moment transmission mechanism of Multi-axis high-precision load loading machine of the present invention;
Fig. 6 is the 3rd force push rod device structural representation of the Multi-axis high-precision load loading machine of the present invention.
Wherein 1 is crossbeam, and 2 is crossbeam pillar, and 3 is base, and 4 is workbench, and 5 is moment device pedestal, and 6 is athwartship moment Transmission mechanism, 7 is lateral bracket, and 8 is swivel head, and 9 is the first force push rod device, and 10 is the 3rd force push rod device, and 11 are Torsion sleeve, 12 is spline housing, and 13 is sliding cross coupling, and 14 is loading moment head, and 15 is torque sensor, and 16 is the arm of force, 17 is guide rail, and 18 is leading screw, and 19 is pedestal, and 20 is force snesor, and 21 is upper joint bearing, and 22 is sliding block, and 23 is tension and compression bullet Spring, 24 is servomotor, and 25 is conveyer belt, and 26 is force head, and 27 is upper semiaxis, and 28 is No. two bearings, and 29 is a bearing, 30 It is top shoe, 31 is connecting shaft, 32 is the second force push rod device, and 33 is connecting plate, and 34 is ShiShimonoseki bearings, and 35 is lower half Axle.
Specific embodiment
With specific embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings.
Case study on implementation one:In conjunction with Fig. 1, a kind of force push rod device, including pedestal 19, the servo that is arranged on pedestal 19 end Motor 24, the guide rail 17 being arranged on pedestal 19 and the leading screw 18 being arranged on by connecting plate 33 on pedestal 19, described servo electricity The output shaft of machine 24 installs driving wheel, and driven pulley installed by leading screw 18, is set with conveyer belt 25, leading screw between driving wheel and driven pulley 18 top shoes 30 having internal thread hole with center coordinate and top shoe 30 is arranged on guide rail 17, the end of top shoe 30 with draw One end of pressing spring 23 is fixedly connected, and the other end of drawing-pressing spring 23 passes through connecting shaft 31 and one end of sliding block 22 is fixing even Connect, leading screw 18 can drive top shoe 30, drawing-pressing spring 23, connecting shaft 31 and sliding block 22 mobile along guide rail 17, sliding block 22 The other end be connected with one end of force snesor 20 by upper joint bearing 21, the other end of force snesor 20 and ShiShimonoseki bearings 34 one end connects, and the other end of ShiShimonoseki bearings 34 is connected with force 26, and force 26 is contacted with measured material, and it is right to realize The power of measured material loads or load loads.
The course of work of force push rod device that the present invention provides is:Servomotor 24 provides power for device, by defeated Band 25 is sent to transfer loads to leading screw 18, leading screw 18 constitutes screw-nut structure with top shoe 30 so that the rotation of leading screw 18 Load is so delivered to sliding block 22 by drawing-pressing spring 23, then passes through by the dynamic linear motion changing into top shoe 30 of transhipment Sliding block 22 is passed through force snesor 20, force 26 and quilt by a pair of oscillating bearing (upper joint bearing 21 and ShiShimonoseki bearings 34) Material of measuring and monitoring the growth of standing timber is connected, and realizes the load to measured material and load, for eliminating the additional force because installing or clamping error produces Square load, namely be used for eliminating additional moment load.During load transmission, force snesor 20 records loaded load size And feedback control corresponds to servomotor 24, complete accurate power and load.
Case study on implementation two:In conjunction with Fig. 2 to Fig. 6, a kind of Multi-axis high-precision load loads machine, including lathe bed support section A, power Square loading section C and clamping part B, gantry that lathe bed support section A is made up of base 3, crossbeam 1 and two crossbeam pillars 2 Type frame construction, for supporting whole Multi-axis high-precision load to load machine.Clamping part B includes installing work on the base 3 Platform 4 and the fixture for clamping measured material, there is ladder chute the upper surface of described workbench 4, described moment loading section C bag Include athwartship moment transmitting device 6 and three described force push rod device, described athwartship moment transmitting device 6 include torsion sleeve 11, Upper semiaxis 27 and lower semiaxis 35, and torsion sleeve 11, upper semiaxis 27 and lower semiaxis 35 coaxial line, torsion sleeve 11 is passed through with upper semiaxis 27 Spline connection, specifically torsion sleeve 11 lower end are connected spline housing 12, the upper end setting spline of upper semiaxis 27, spline housing 12 with Spline fitted realizes torsion sleeve 11 and the connection of upper semiaxis 27, passes through sliding cross coupling between upper semiaxis 27 and lower semiaxis 35 13 connections, upper semiaxis 27 are set with and are provided with one-to-one bearing 29 between swivel head 8, and upper semiaxis 27 and swivel head 8, No. one The inner ring of bearing 29 is coordinated with upper semiaxis 27, and the outer ring of a bearing 29 and swivel head 8 coordinate so that upper semiaxis 27 and rotation Rotary head 8 has relative rotary motion, and swivel head 8 can rotate freely around athwartship moment transmission mechanism 6, and swivel head 8 can drive Lateral bracket 7 rotates 90 °, and realizes the switching around X and the load mode of Y-axis;The bottom of lower semiaxis 35 is with torque sensor 15 even Connect, the bottom of torque sensor 15 is connected with loading moment head 14, the connected lateral bracket 7 in rear end of swivel head 8, the first force pushes away Lever apparatus 9 and the second force push rod device 32 are fixedly mounted in lateral bracket 7 respectively straight down by pedestal 19 and symmetrical It is distributed in the both sides of swivel head 8, and the first force push rod device 9 and the second force push rod device 32 constitute longitudinally force push rod dress Put, moment device pedestal 5 is fixedly mounted on described crossbeam 1, the 3rd force push rod device 10 horizontal cross is arranged on moment dress Put on pedestal 5, and the 3rd force push rod device, as horizontal force push rod device, specifically sets on moment device pedestal 5 It is equipped with bolt hole, the 3rd force push rod device 10 is bolted and is fixedly mounted on moment device pedestal 5, described crossbeam 1 Centre position be provided with through hole, torsion sleeve 11 is inserted described through hole and is connected with crossbeam 1 by No. two bearings 28, and No. two axles Hold 28 inner ring and torsion sleeve 11 coordinates, the centre bore cooperation of outer ring and crossbeam, the arm of force 16 and the are passed through in the upper end of torsion sleeve 11 ShiShimonoseki bearings 34 of three force push rod device 10 are hinged, namely one end of the arm of force 16 is bolted realization and torsion sleeve 11 Being fixedly connected of upper end, the other end of the arm of force 16 is hinged with ShiShimonoseki bearings 34 of the 3rd force push rod device 10, makes cross force Square transmission mechanism 6 can turn about the Z axis, but can not move up and down;Described first force push rod device 9, second force push rod device 32 and the 3rd force push rod device 10 all include pedestal 19, the servomotor 24 being arranged on pedestal 19 end, be arranged on pedestal 19 On guide rail 17 and the leading screw 18 being arranged on by connecting plate 33 on pedestal 19, the output shaft of described servomotor 24 installs actively Wheel, driven pulley installed by leading screw 18, is set with conveyer belt 25 between driving wheel and driven pulley, and leading screw 18 and center have internal thread hole Top shoe 30 coordinate and top shoe 30 is arranged on guide rail 17, the end of top shoe 30 is fixing with one end of drawing-pressing spring 23 even Connect, the other end of drawing-pressing spring 23 is fixedly connected with one end of sliding block 22 by connecting shaft 31, the other end of sliding block 22 leads to The one end crossing upper joint bearing 21 with force snesor 20 is connected, and the other end of force snesor 20 is connected with one end of ShiShimonoseki bearings 34 Connect, the other end of ShiShimonoseki bearings 34 of the first force push rod device 9 and the second force push rod device 32 is connected with force 26, Force 26 is contacted with measured material, and ShiShimonoseki bearings 34 of the 3rd force push rod device 10 are hinged with the arm of force 16.3rd force The operation principle of push rod device 10 is that loading force is applied to the arm of force 16, and by the arm of force 16, loading force is become loading force Square, loading moment passes sequentially through torsion sleeve 17, spline housing 12, upper semiaxis 27, sliding cross coupling 13 and lower semiaxis 35 and passes to Torque sensor 15, loading moment size recorded by torque sensor 15 and feedback control corresponds to watching of the 3rd force push rod device Take motor 24, final loading moment head 14 carries out accurate moment loading to measured material.
Taking Fig. 3 as a example:Z axis of the present invention refer to the direction perpendicular to workbench 4, and the positive direction of Z axis is perpendicular to Work upwardly direction;X-axis is the direction parallel with crossbeam 1, and the positive direction of X-axis is parallel to crossbeam direction to the right;Y-axis is With the direction of beam vertical, the positive direction of Y-axis is perpendicular to crossbeam outwardly direction.
By the position relationship loading cooperation and lateral bracket 7 between three force push rod device, four kinds can be completed and add Carry, concrete grammar is as follows:
(1) first force push rod device 9 and the second force push rod device 32 to measured material apply two etc. big in the same direction During power load, measured material is subject to the axial force along Z axis to load;
(2) when so that lateral bracket 7 and crossbeam 1 is placed in parallel, and the first force push rod device 9 and the second force push rod device 32 to measured material apply two grade power load reverse greatly when, measured material carry out around Y direction moment load;
(3) when lateral bracket 7 and crossbeam 1 are disposed vertically, and the first force push rod device 9 and the second force push rod device 32 During to measured material two grade power load reverse greatly of applying, measured material carries out loading around the moment of X-direction;
(4) the 3rd force push rod device 10 imposed load power, are changed into load moment through the arm of force 16, by athwartship moment The moment that transmission mechanism 6 carries out direction about the z axis to measured material loads.
In sum, the present invention provide Multi-axis high-precision load load machine measured material can be carried out respectively around X, Y, The moment in three directions of Z axis loads and the axial force of Z axis loads.

Claims (2)

1. a kind of force push rod device it is characterised in that:The servomotor that including pedestal, is arranged on base ends, it is arranged on base Guide rail on seat and the leading screw being arranged on by connecting plate on pedestal, the output shaft of described servomotor installs driving wheel, leading screw Upper installation driven pulley, is set with conveyer belt between driving wheel and driven pulley, leading screw and center have the top shoe cooperation of internal thread hole And top shoe is arranged on guide rail, the end of top shoe is fixedly connected with one end of drawing-pressing spring, and the other end of drawing-pressing spring leads to Cross connecting shaft to be fixedly connected with one end of sliding block, the other end of sliding block is passed through upper joint bearing and connected with one end of force snesor Connect, the other end of force snesor is connected with one end of ShiShimonoseki bearings, the other end of ShiShimonoseki bearings is connected with force head, force Head is contacted with measured material.
2. a kind of multiaxial loading loads machine, including lathe bed support section, moment loading section and clamping part, lathe bed support section The flame frame construction being made up of base, crossbeam and two crossbeam pillars, clamping part includes the work being arranged on base Station and for clamping the fixture of measured material, the upper surface of described workbench have ladder chute it is characterised in that:Described moment Loading section includes athwartship moment transmitting device and three force push rod device, and described athwartship moment transmitting device includes torsion Set, upper semiaxis and lower semiaxis, torsion sleeve passes through spline connection with upper semiaxis, is joined by crosshead shoe between upper semiaxis and lower semiaxis Axial organ connects, and on upper semiaxis, suit arranges one-to-one bearing, the bottom of lower semiaxis between swivel head, and upper semiaxis and rotary shaft It is connected with torque sensor, the bottom of torque sensor is connected with loading moment head, the connected lateral bracket in rear end of swivel head, the One force push rod device and second force push rod device be fixedly mounted on straight down respectively by pedestal in lateral bracket and right Claim to be distributed in the both sides of swivel head, moment device pedestal is fixedly mounted on described crossbeam, the 3rd force push rod device level is horizontal To being arranged on moment device pedestal, the centre position of described crossbeam is provided with through hole, and torsion sleeve is inserted described through hole and passed through No. two bearings are connected with crossbeam, and the arm of force and the hypozygal bearing hinge connection of the 3rd force push rod device are passed through in the upper end of torsion sleeve;
Described first force push rod device, the second force push rod device and the 3rd force push rod device all include pedestal, are arranged on The servomotor of base ends, the guide rail being arranged on pedestal and the leading screw being arranged on by connecting plate on pedestal, described servo The output shaft of motor installs driving wheel, and driven pulley installed by leading screw, is set with conveyer belt between driving wheel and driven pulley, leading screw with The heart has the top shoe cooperation of internal thread hole and top shoe is arranged on guide rail, and the end of top shoe is solid with one end of drawing-pressing spring Fixed connection, the other end of drawing-pressing spring is fixedly connected with one end of sliding block by connecting shaft, and the other end of sliding block is by upper Oscillating bearing is connected with one end of force snesor, and the other end of force snesor is connected with one end of ShiShimonoseki bearings, the first force The other end of ShiShimonoseki bearings of push rod device and the second force push rod device is connected with force head, and force head is connect with measured material Touch, ShiShimonoseki bearings of the 3rd force push rod device are hinged with the arm of force.
CN201510016485.8A 2015-01-12 2015-01-12 Force-applying push rod device and multi-axial load loading machine Active CN104568575B (en)

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CN105181481B (en) * 2015-10-14 2017-11-28 哈尔滨工程大学 A kind of three-point bending fatigue tester
CN106181755A (en) * 2016-07-12 2016-12-07 邹敏 A kind of cross slide device
CN108519438B (en) * 2018-01-24 2021-01-12 浙江理工大学 Axial force high-precision loading device for elastic wave detection

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