CN115096528A

CN115096528A - Detection method and detection equipment for measuring four-way rigidity of elastic joint by one-time clamping

Info

Publication number: CN115096528A
Application number: CN202210782367.8A
Authority: CN
Inventors: 严德翠; 杨勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-05
Filing date: 2022-07-05
Publication date: 2022-09-23

Abstract

The invention discloses a detection method and detection equipment for measuring the four-way rigidity of an elastic joint by one-time clamping, wherein the detection method comprises the steps of arranging a first clamp and a second clamp, clamping the first clamp on a tool ring on an outer sleeve of the elastic joint, clamping the second clamp on a mandrel of the elastic joint, and enabling the first clamp and the second clamp to move relatively; by keeping the second clamp fixed, controlling the first clamp to move back and forth along the radial direction of the elastic joint or controlling the first clamp to rotate along the deflection direction of the elastic joint, so that relative motion is generated between the outer sleeve of the elastic joint and the mandrel, and the radial and deflection stiffness of the elastic joint is measured; and by keeping the first clamp fixed, controlling the second clamp to move back and forth along the axial direction of the elastic joint or controlling the second clamp to rotate along the torsion direction of the elastic joint, so that relative motion is generated between the outer sleeve of the elastic joint and the mandrel, and the axial stiffness and the torsion stiffness of the elastic joint are measured. The four-direction rigidity detection device can detect the four-direction rigidity only by clamping once.

Description

Detection method and detection equipment for measuring four-way rigidity of elastic joint by one-time clamping

Technical Field

The invention relates to a method and a device for detecting the rigidity of an elastic joint, in particular to a method and a device for detecting the four-way rigidity of an elastic joint by one-time clamping, belonging to the technical field of rigidity detection of elastic joint products (mainly metal-rubber elastic joints).

Background

The elastic joint is widely applied to vehicle ground plates and various suspensions, is used for flexibly connecting each part, keeps the relative position of each part, allows each connecting piece to generate relative motion, and plays an important role in improving the stability, the comfort and the trafficability characteristic of a vehicle.

The elastic joints of the vehicle, which generally refer to metal-rubber joints, also include metal-polyurethane joints, nylon-rubber joints and the like, comprise ball hinges of shock absorbers of railway locomotives and other ball hinges, bushings of shock absorbers of automobiles, ball hinges of thrust rods of chassis of vehicles, bushings of leaf springs and stabilizer bars, bushings of frames and auxiliary frames of passenger cars, bushings of suspension of engines and cabs and the like.

The functional characteristics of the elastic joint determine the rigidity performance of the elastic joint, and the elastic joint is an important functional characteristic, so that the rigidity performance is a project which needs to be detected and subjected to control at a reset point in the product development or mass production process.

The rigidity of the elastic joint generally comprises four directions of radial direction, axial direction, deflection and torsion, and as shown in fig. 1, the elastic joint 1 comprises a mandrel 111 and an outer sleeve 112, wherein the mandrel 111 is vulcanized in the outer sleeve 112 through a rubber body. The axial direction of the mandrel 111 is set to be the X direction, the vertical radial direction of the outer sleeve 112 is set to be the Y direction, the horizontal radial direction of the outer sleeve 112 is set to be the Z direction, the axis X, the axis Y and the axis C form a space coordinate system, and the axis X, the axis Y and the axis C are intersected at the central point of the elastic joint, so that the X direction is the axial direction of the elastic joint, the A direction rotating around the X direction is the torsion direction of the elastic joint, the Z direction is the radial direction of the elastic joint, and the B direction rotating around the Z direction is the deflection direction of the elastic joint.

In the prior art, as shown in fig. 2, the outer sleeve 112 of the elastic joint 1 is first pressed into the tooling ring 2 with a specific inner diameter, so that the joint outer sleeve 112 and the tooling ring 2 are attached to form a reliable force-bearing unit, and then the detection is performed, as follows:

axial stiffness: generally, an electronic universal tester is used to fix the outer sleeve 112 and the tooling ring 2, a load is applied to the end face of the mandrel 111, the mandrel 111 moves back and forth along the axial direction (X direction), so that relative movement is generated between the mandrel 111 and the outer sleeve 112, the load displacement value is monitored and read, and the axial stiffness value is calculated. If pressure bidirectional load needs to be applied, the actuating head of the testing machine and the mandrel need to be reliably connected.

Torsional rigidity: generally, a torsion tester is used to fix the outer sleeve 112 and the tooling ring 2, torque is applied to the mandrel 111, the mandrel 111 rotates in the direction a, so that relative rotation is generated between the mandrel 111 and the outer sleeve 112, the torque and angular displacement values are monitored and read, and the torsion rigidity value is calculated.

Radial stiffness: generally, an electronic universal tester is used to fix the mandrel 111 supporting the spherical hinge, apply a load on the outer circumferential surface of the tooling ring 2, and move the outer sleeve 112 and the tooling ring 2 back and forth along the Z direction, so that the mandrel 111 and the outer sleeve 112 move relatively, and the load and displacement values are monitored and read, and the radial stiffness value is calculated. If pressure bidirectional load needs to be applied, the actuating head of the testing machine and the tooling ring need to be reliably connected.

Deflection rigidity: generally, a torsion testing machine is used to fix the mandrel 111 supporting the spherical hinge, apply torque to the tooling ring 2, rotate the outer sleeve 112 and the tooling ring 2 in the direction B, so that the mandrel 111 and the outer sleeve 112 rotate relatively, monitor and read the torque and angular displacement values, and calculate to obtain a deflection stiffness value.

As described above, the detection of the four-directional stiffness of the elastic joint requires different equipment and tools, and is complicated in clamping and program debugging; especially when radial and axial need load to draw and press two-way load, the operation is very troublesome, and generally need to pass many times frock debugging, just can obtain accurate result. The labor intensity is high, the detection efficiency is low, the requirements on the operation skill and experience of an inspector are high, and the detection deviation is easy to occur.

With the rapid development of the vehicle industry and the continuous improvement of the requirements on the comfort and the reliability of the whole vehicle, the types and the number of related elastic joint products are obviously increased, more and more detection items are provided, the requirements on the number and the frequency of detection are higher, the rigidity performance of the joint part is detected, and the multiple increase is realized.

Therefore, the detection efficiency of the traditional four-way rigidity detection method cannot meet the current detection requirement; due to the pressure of enterprise costs, it is unlikely that performance monitoring equipment and personnel will be provisioned in equal proportions. Therefore, the method for detecting the rigidity of the elastic joint is optimized, the detection efficiency and the accuracy are improved, and the method has great significance.

The applicant has found the following patent documents through search:

the invention discloses a joint bearing rigidity test device, which is disclosed in Chinese patent application with application publication number CN110672288A and publication date of 2020, 1 month and 10 days, and comprises a test box body, a joint bearing seat, a main shaft, a locking nut, a loading device and a sensor; the test box body comprises an upper box body and a lower box body which are detachably connected; the upper box body is provided with a radial loading screw hole, a flange plate half hole, an upper box body main shaft fixing threaded hole and an upper box body light hole; the flange half-hole is arranged on the left side wall of the upper box body, the corresponding flange half-hole is also formed in the left side wall of the lower box body, and when the upper box body and the lower box body are connected and fixed, the two flange half-holes are butted and used for being matched with a flange on the main shaft to form a left end fixing end of the main shaft; the radial loading screw hole is arranged on the upper wall of the upper box body and is used for being matched with the radial loading screw to apply radial force to the tested knuckle bearing; the upper box body main shaft fixing threaded hole is formed in the right side wall of the upper box body, and when the upper box body main shaft fixing threaded hole is used, the upper box body main shaft fixing threaded hole is aligned with a first threaded hole in the right end of a main shaft on the main shaft and is connected through an upper box body main shaft fixing bolt to form a right end fixing end of the main shaft; the upper box body unthreaded hole is formed in the right side wall of the upper box body and is positioned above the upper box body main shaft fixing threaded hole, and the upper box body unthreaded hole is used for being matched with the upper box body axial loading screw rod to apply axial force to the tested knuckle bearing; the lower box body comprises a counter bore, a lower box body main shaft fixing threaded hole and a lower box body light hole; the counter bores are grooves formed in the right side wall inside the lower box body, the counter bores are formed in the right side wall inside the corresponding upper box body, and when the upper box body and the lower box body are connected and fixed, the two counter bores are in butt joint and used for being matched with a shaft section of the spindle; the lower box body main shaft fixing threaded hole is formed in the right side wall of the lower box body, and when the lower box body main shaft fixing threaded hole is used, the lower box body main shaft fixing threaded hole is aligned with the second threaded hole in the right end of the main shaft on the main shaft and is connected through the lower box body main shaft fixing bolt to form a main shaft right end fixing end; the lower box body unthreaded hole is formed in the right side wall of the lower box body and is used for being matched with the axial loading screw rod of the lower box body to apply axial force to the tested knuckle bearing; the joint bearing seat comprises a bearing gland and a joint bearing seat body, and the bearing gland is detachably connected with the joint bearing seat body; the joint bearing seat bodies are symmetrically arranged in the upper box body and the lower box body, and when the upper box body and the lower box body are connected and fixed, a complete joint bearing seat body is formed; the joint bearing seat body is provided with a radial force sensor arrangement hole and a shaft shoulder, the radial force sensor arrangement hole is formed in the lower end face of the joint bearing seat body and used for arranging a third radial displacement eddy current sensor, and the shaft shoulder is arranged on the inner end face of the joint bearing seat body; the bearing gland comprises a positioning surface, and when the joint bearing seat body is fixedly connected with the bearing gland, the positioning surface is matched with the shaft shoulder and used for positioning the outer ring of the tested joint bearing; the main shaft comprises a shaft section, a first threaded hole at the right end of the main shaft, a second threaded hole at the right end of the main shaft, a shaft shoulder and a flange plate; the shaft section is arranged at one end of the main shaft, the flange plate is arranged at the other end of the main shaft, a first threaded hole at the right end of the main shaft and a second threaded hole at the right end of the main shaft are formed in the end surface of the shaft section, and the shaft shoulder is arranged at one end, close to the flange plate, of the middle part of the main shaft; the locking nut is detachably arranged at one end, close to the shaft section, of the middle of the main shaft, when the locking nut is used, the inner ring of the tested joint bearing is sleeved on the main shaft, the locking nut is screwed into the main shaft along the radial direction of the main shaft, and the inner ring is located between the shaft shoulder and the locking nut so as to fix the inner ring; the loading device comprises a radial loading screw, an upper box body axial loading screw, a lower box body axial loading screw, a radial force sensor, an upper box body axial force sensor and a lower box body axial force sensor; the radial force sensor is fixedly connected with the upper surface of the joint bearing seat body and used for measuring the radial force applied to the tested joint bearing by the radial loading screw rod, and the upper box body axial force sensor and the lower box body axial force sensor are fixedly connected with the right end face of the joint bearing seat body and respectively used for measuring the axial force applied to the tested joint bearing by the upper box body axial loading screw rod and the lower box body axial loading screw rod; the sensor is arranged in the test box body and comprises a first radial displacement eddy current sensor, a second radial displacement eddy current sensor, a third radial displacement eddy current sensor, a first axial displacement eddy current sensor, a second axial displacement eddy current sensor, a third axial displacement eddy current sensor and a fourth axial displacement eddy current sensor; the first radial displacement eddy current sensor and the second radial displacement eddy current sensor are symmetrically arranged on the left side and the right side of the joint bearing seat along the axial direction of the main shaft and are used for measuring the deformation of an inner ring of the tested joint bearing; the third radial displacement eddy current sensor is arranged in the radial force sensor arrangement hole and used for measuring the deformation of the outer ring of the tested knuckle bearing; the first axial displacement eddy current sensor and the second axial displacement eddy current sensor are symmetrically arranged at the upper side and the lower side of the main shaft, and the measuring head points to the right end face of the joint bearing seat and is used for measuring the deformation of the outer ring; the third axial displacement eddy current sensor and the fourth axial displacement eddy current sensor are symmetrically arranged on the upper side and the lower side of the main shaft in the radius range of the inner ring, and the measuring heads point to the end face of the inner ring and are used for measuring the deformation of the inner ring.

The Chinese utility model patent with the authorized announcement number of CN211784147U and the authorized announcement date of 2020, 10 and 27 discloses a multifunctional rubber node rigidity test tool, which comprises an upper clamp at the upper end, a lower clamp at the lower end and a middle node clamp; the upper clamp and the lower clamp are both provided with clamp fixing mounting holes, the lower clamp is an axial clamp or a radial clamp, one end of the node clamp is connected with the upper clamp through a plurality of supporting screw rods, and the other end of the node clamp is connected with the lower clamp through a clamped rubber node.

Three, the grant bulletin number is CN214040556U, and the grant bulletin date is the china utility model patent of 2021 year 8 month 24 days discloses a ball pivot deflection and torsional rigidity test frock, including being used for fixed spheroid and driving spheroid pivoted ball pivot deflection assembly and being used for driving the ball pivot and twist reverse the subassembly at ball pivot both ends, ball pivot deflection assembly clamps the seat and be used for driving bulb pivoted rotation connecting seat including being used for the fixed of vertical fixed with the ball pivot, the fixed seat that clamps is used for clamping fixed ball pivot both ends, the fixed middle part that clamps the seat is equipped with the connection mounting hole of being connected with the actuating shaft at one end drive chuck middle part, rotate the connecting seat including the cardboard that is used for clamping the two corresponding locks of fixed bulb, and the outside of one of them cardboard installs the connecting axle one that corresponds with rotation drive chuck middle part connecting hole, ball pivot twists reverse the subassembly including being used for clamping fixed ball pivot one end and driving middle part connecting hole grafting connecting hole with one end And the other end of the fixed spherical hinge shaft is inserted into an insertion hole of the driving shaft in the middle of the driving chuck.

The test methods in the first and second patent documents can only test the two-way rigidity by one clamping, but cannot test the four-way rigidity by one clamping. The test method of the third patent document actually requires multiple clamping to test the multi-directional rigidity. Therefore, it can be seen that the technical solutions in the above patent documents are different from the technical solution of the present application.

In conclusion, the method and the device for detecting the rigidity of the elastic joint are optimized, the detection efficiency and the accuracy are improved, the labor intensity is reduced, and the method and the device have great significance. Firstly, how to improve the detection efficiency and meet the current detection requirement is achieved so as to adapt to the rapid development of the vehicle industry; secondly, how to simplify the steps during detection and reduce the labor intensity of operators; thirdly, how to reduce the detection deviation and improve the accuracy of the detection result. The above problems are technical problems which need to be solved urgently.

Disclosure of Invention

The invention aims to solve the technical problem that the defects in the prior art are overcome, and provides a detection method and detection equipment for measuring the four-way rigidity of an elastic joint by one-time clamping, wherein the four-way rigidity can be detected by only one-time clamping, so that the detection efficiency is improved, and the current detection requirements can be met; the detection steps are convenient and simple, and the labor intensity of operators is reduced; the detection deviation is small, and the accuracy of the detection result is improved.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the detection method for measuring the four-way rigidity of the elastic joint by one-time clamping comprises the steps of arranging a first clamp and a second clamp, clamping a tool ring on an outer sleeve of the elastic joint by the first clamp, clamping a mandrel of the elastic joint by the second clamp, and enabling the first clamp and the second clamp to move relatively; by keeping the second clamp fixed, controlling the first clamp to move back and forth along the radial direction of the elastic joint or controlling the first clamp to rotate along the deflection direction of the elastic joint, so that relative motion is generated between the outer sleeve and the mandrel of the elastic joint to measure the radial stiffness and the deflection stiffness of the elastic joint; and by keeping the first clamp fixed, controlling the second clamp to move back and forth along the axial direction of the elastic joint or controlling the second clamp to rotate along the torsion direction of the elastic joint, so that relative motion is generated between the outer sleeve of the elastic joint and the mandrel, and the axial stiffness and the torsion stiffness of the elastic joint are measured.

Preferably, the first clamp and the second clamp are arranged in a crossed manner, and the elastic joint is arranged at the position of the crossed point of the first clamp and the second clamp.

Preferably, the first clamp and the second clamp are arranged into a frame structure, and a frame through hole is formed in the first clamp and comprises a first frame through hole and a second frame through hole; when the first clamp and the second clamp are arranged in a staggered mode, the frame edges on two opposite sides of the second clamp respectively penetrate through the frame through hole I and the frame through hole II on the first clamp, and therefore the first clamp and the second clamp are arranged in a crisscross mode.

Preferably, a first shaft and a second shaft are respectively arranged on two opposite sides of the first clamp frame structure, and a third shaft and a fourth shaft are respectively arranged on two opposite sides of the second clamp frame structure; the first shaft and the second shaft are connected with a power loading detection system, and the third shaft and the fourth shaft are connected with a power loading detection system II;

the core shaft of the elastic joint is fixed by keeping the power loading detection system II inactive, and the power loading detection system I is controlled to act to drive the outer sleeve of the elastic joint to move back and forth along the radial direction of the elastic joint or control the outer sleeve of the elastic joint to rotate along the deflection direction of the elastic joint, so that the radial rigidity and the deflection rigidity of the elastic joint are detected;

the outer sleeve of the elastic joint is fixed by keeping the first power loading detection system inactive, and the second power loading detection system is controlled to act to drive the mandrel of the elastic joint to move back and forth along the axial direction of the elastic joint or to control the mandrel of the elastic joint to rotate along the torsion direction of the elastic joint, so that the axial stiffness and the torsion stiffness of the elastic joint are detected.

Preferably, the first shaft and the second shaft of the first clamp respectively penetrate through the first shaft supporting seat and the second shaft supporting seat, and the power loading detection system comprises a deflection loading detection device and a radial loading detection device; a first shaft penetrating through the first shaft supporting seat is connected with the deflection loading detection device, and a second shaft penetrating through the second shaft supporting seat is connected with the radial loading detection device;

the deflection loading detection device comprises a first servo motor and a first torque sensor; when in connection, an output shaft of the first servo motor is connected with a first shaft penetrating through a first shaft supporting seat through a first torque sensor; the servo motor I is in sliding connection with the base platform through the guide rail sliding block mechanism I;

the radial loading detection device comprises a linear loading power device I, an axial one-way coupling I and a shaft V, wherein the linear loading power device I is hinged on the base platform, and the axial one-way coupling I only transmits axial loads but does not transmit radial and torsional loads; during connection, a second shaft penetrating through a second shaft supporting seat is connected with one side of a first force sensor, one end of a fifth shaft is connected with the other side of the first force sensor, and the other end of the fifth shaft is connected with a first output shaft of a first linear load power device through a first axial one-way coupler;

when detecting the radial rigidity: the mandrel of the elastic joint is fixed by keeping the power loading detection system II inactive and keeping the clamp II stationary, and the output shaft I of the linear loading power device I is controlled to do linear motion, so that the shaft V, the shaft II, the U-shaped frame, the shaft I and the servo motor I are sequentially driven to do linear motion;

when the deflection rigidity is detected: the second power loading detection system is kept to be inactive, the second clamp is kept to be fixed, the mandrel of the elastic joint is fixed, the output shaft of the first servo motor is controlled to rotate, the first shaft, the U-shaped frame, the second shaft and the fifth shaft are sequentially driven to rotate, and the U-shaped frame is connected with the outer sleeve of the elastic joint, so that the outer sleeve can rotate around the outer sleeve, relative motion is generated between the outer sleeve of the elastic joint and the mandrel, and deflection rigidity of the elastic joint is measured.

Preferably, a third shaft and a fourth shaft of the second clamp respectively penetrate through a third shaft supporting seat and a fourth shaft supporting seat, and the second power loading detection system comprises a torsion loading detection device and an axial loading detection device; a third shaft penetrating through the third shaft supporting seat is connected with the torsion loading detection device, and a fourth shaft penetrating through the fourth shaft supporting seat is connected with the axial loading detection device;

the torsion loading detection device comprises a second servo motor and a second torque sensor, and when the torsion loading detection device is connected, an output shaft of the second servo motor is connected with a third shaft penetrating through a third shaft support seat through the second torque sensor; the servo motor II is in sliding connection with the base platform through a guide rail sliding block mechanism II;

the axial loading detection device comprises a linear load power device II, an axial one-way coupling II and a shaft VI, the linear load power device II is hinged on the base platform, and the axial one-way coupling II only transmits axial load but does not transmit radial and torsional load; when the two-way coupling is connected, a shaft IV penetrating through a shaft support seat IV is connected with one side of a force sensor II, one end of a shaft VI is connected with the other side of the force sensor II, and the other end of the shaft VI is connected with an output shaft II of a linear load power device II through an axial one-way coupling II;

when the axial rigidity is detected: the outer sleeve of the elastic joint is fixed by keeping the first power loading detection system inactive and keeping the first clamp fixed, and the output shaft II of the second linear loading power device is controlled to do linear motion so as to sequentially drive the sixth shaft, the fourth shaft, the rectangular frame, the third shaft and the second servo motor to do linear motion;

when detecting torsional rigidity: the outer sleeve of the elastic joint is fixed by keeping the power loading detection system I inactive and keeping the clamp I fixed, the output shaft of the servo motor II is controlled to rotate, so that the shaft III, the rectangular frame, the shaft IV and the shaft VI are sequentially driven to rotate, and the rectangular frame is connected with the mandrel of the elastic joint, so that the mandrel can rotate, the outer sleeve of the elastic joint and the mandrel can move relatively, and the torsional rigidity of the elastic joint can be measured.

The invention also discloses a detection device for measuring the four-way rigidity of the elastic joint by one-time clamping, which comprises a first clamp and a second clamp, wherein the first clamp is used for clamping a tool ring on an elastic joint sleeve, the second clamp is used for clamping a mandrel of the elastic joint, the first clamp and the second clamp are arranged in a crisscross manner, the elastic joint is clamped at the position of the staggered point of the first clamp and the second clamp, the first clamp and the second clamp can move relatively, the first clamp can move back and forth along the radial direction of the elastic joint or rotate along the deflection direction of the elastic joint, the second clamp can move back and forth along the axial direction of the elastic joint or rotate along the torsion direction of the elastic joint, and the radial rigidity, the deflection rigidity, the axial rigidity and the torsion rigidity of the elastic joint are measured by the mutual matching of the first clamp and the second clamp.

Preferably, the first clamp comprises a U-shaped frame and a pressing block, the elastic joint is placed in a U-shaped opening of the U-shaped frame, the pressing block is locked on the U-shaped opening of the U-shaped frame, and the pressing block is in contact with a tooling ring on an outer sleeve of the elastic joint, so that the elastic joint is pressed in the U-shaped opening of the U-shaped frame by the pressing block; the second fixture comprises a rectangular frame and a cross beam, the cross beam comprises a first cross beam and a second cross beam, the first cross beam and the second cross beam are arranged inside the rectangular frame and connected with the rectangular frame, and a mandrel clamping mechanism is arranged on the first cross beam and the second cross beam and used for clamping two ends of a mandrel of the elastic joint.

Preferably, the mandrel clamping mechanism comprises a first pressing block, a second pressing block, a first pressing block and a second pressing block which are arranged on the beam, a beam groove is formed in the top of the beam, the opening of the beam groove faces upwards, the first pressing block, the second pressing block, the first pressing block and the second pressing block are arranged in the beam groove, one sides of the first pressing block and the second pressing block are respectively in contact with two inner side surfaces of the beam groove, pressing block inclined surfaces are arranged on the other sides of the first pressing block and the second pressing block, pressing block inclined surfaces of the first pressing block are respectively provided with a pressing block inclined surface, the pressing block inclined surfaces of the first pressing block are in contact with the pressing block inclined surfaces of the first pressing block, and the pressing block inclined surfaces of the second pressing block are in contact with the pressing block inclined surfaces of the second pressing block.

Preferably, the mandrel clamping mechanism comprises a first pressing block and a second pressing block which are arranged on the beam, a beam groove is formed in one side part of the beam, the opening of the beam groove faces to the axial direction of the mandrel of the elastic rubber joint, two side edges of the beam groove are arranged to be inclined planes, one side surfaces of the first pressing block and the second pressing block are also arranged to be inclined planes, the inclined side surfaces of the first pressing block and the second pressing block are respectively in matched contact with the inclined planes of the two side edges of the beam groove, a first accommodating groove and a second accommodating groove are respectively arranged on the first pressing block and the second pressing block close to the bottom in the groove of the cross beam, the openings of the first accommodating groove and the second accommodating groove are oppositely arranged, so that the first accommodating groove and the second accommodating groove form an accommodating space, and a threaded hole is formed in the other side part of the cross beam, a screw penetrates through the threaded hole to be connected with a push block, and the push block is positioned in the accommodating space.

The invention has the beneficial effects that: the two clamps are arranged to respectively clamp the mandrel of the elastic joint and the tool ring on the outer sleeve, and can move relatively; the two clamps are used for matching action, so that relative motion is generated between the outer sleeve and the mandrel of the elastic joint, and the four-way rigidity such as the radial rigidity, the deflection rigidity, the axial rigidity, the torsional rigidity and the like of the elastic joint is measured. Furthermore, in regard to the tensile and compressive loading of the elastic joint, the conventional test method has the defects of complex and time-consuming tool clamping and connection, low detection accuracy, repeated disassembly, assembly and inspection and wiping, and low efficiency. The elastic joint one-time clamping detection method is naturally suitable for tension and compression bidirectional loads, so that the effect of improving the efficiency is more obvious aiming at the detection of the type. The detection efficiency can be improved by at least 200%, even 500% or more, and the detection accuracy can be ensured, so that the detection capability of the elastic joint part is improved, and the development of the whole industry is positively influenced. The first clamp and the second clamp are arranged in a crossed and staggered mode, and the elastic joint is arranged at the position of the crossed position of the first clamp and the second clamp, so that the characteristic that the two clamps can move relatively is achieved, and normal operation of four-direction rigidity detection is guaranteed. Through the specific structural design of the two clamps, the structure that the first clamp and the second clamp are arranged in a crossed and staggered mode is realized, and the smooth four-way rigidity detection is guaranteed on the premise that the outer sleeve and the mandrel of the elastic joint are respectively clamped through the two clamps. Through the specific design of the power loading detection system, the operation process of clamping can be standardized and automated, and the detection efficiency is high; and the detection result completely depends on the structure and the precision of the equipment, and is hardly influenced by the experience and the capability of a detection person.

Drawings

FIG. 1 is a first perspective view of an elastic joint;

FIG. 2 is a schematic perspective view of an elastic joint;

FIG. 3 is a schematic diagram of the principles of the present invention;

FIG. 4 is a schematic perspective view of a first clamp and a second clamp arranged in a crisscross manner according to a first embodiment of the present invention;

FIG. 5 is a first perspective view of a first clamp according to a first embodiment of the present disclosure;

FIG. 6 is a schematic perspective view of a first fixture according to a second embodiment of the present invention;

FIG. 7 is a partial schematic front view of a fixture in an elastic joint of the first embodiment of the present invention after clamping a tooling ring on an outer sleeve of the elastic joint;

fig. 8 is a schematic perspective view of a first clamp according to a first embodiment of the present invention;

FIG. 9 is a schematic perspective view of a second clamp according to a first embodiment of the present invention;

FIG. 10 is a schematic front view of a cross beam of a second clamp according to a first embodiment of the present invention;

FIG. 11 is a partial perspective view of the beam of FIG. 9;

FIG. 12 is an enlarged view of the portion C of FIG. 8;

FIG. 13 is a schematic front view of a cross beam of a second clamp according to a first embodiment of the present invention;

fig. 14 is a schematic perspective view of the first clamp, the second clamp, the power loading detection system and the second power loading detection system after being connected and installed in the first embodiment of the present invention;

FIG. 15 is a schematic top view of the structure of FIG. 14;

FIG. 16 is a schematic partial perspective view of the deflection loading detector assembly of FIG. 14;

FIG. 17 is a partial perspective view of the radial load detection device of FIG. 14;

FIG. 18 is a schematic axial cross-sectional view of a first axial one-way coupling according to a first embodiment of the present invention;

FIG. 19 is a schematic partial perspective view of a cross beam of a second clamp according to a second embodiment of the present invention, the cross beam being located at a mandrel clamping mechanism;

FIG. 20 is a schematic top view of the structure of FIG. 19;

in the figure: 1. elastic joint, 111 mandrel, 112 jacket, 2 tooling ring, 3 clamp I, 311U-shaped frame, 3111 frame through hole I, 3112 frame through hole II, 312 press block, 4 clamp II, 411 rectangular frame, 4111 long frame edge, 4112 wide frame edge, 412 cross beam I, 413 cross beam II, 5 screw I, 6 arc pad, 7 cone profile, 8 reinforcing connecting plate, 9 screw II, 10 shaft I, 11 shaft II, 12 mandrel clamping mechanism, 121 press block I, 122 press block II, 123 press block I, 124 press block II, 13 cross beam groove, 14 press block inclined plane, 15 press block inclined plane, 16 screw III, 17 screw IV, 18 screw cushion block I, 19 press block II, 20 waist hole, 21 through hole, 22. the third shaft, 23, the fourth shaft, 24, the first shaft support seat, 25, the second shaft support seat, 26, a deflection loading detection device, 261, the first servo motor, 262, the first torque sensor, 263, the first guide rail sliding block mechanism, 27, the radial loading detection device, 271, the first linear load power device, 2711, the first output shaft, 27111, the second end flange, 272, the first axial one-way coupling, 2721, the coupling shell, 2722, the first hole, 2723, the second hole, 2724, the inner groove, 28, the basic platform, 29, the first force sensor, 30, the fifth shaft, 301, the first end flange, 31, the third shaft support seat, 32, the fourth shaft support seat, 33, the torsion loading detection device, 331, the second servo motor, 332, the second torque sensor, 333, the second guide rail sliding block mechanism, 34, the axial loading detection device, 341. a second linear load power device 3411, a second output shaft 3411, a second axial one-way coupling 35, a second force sensor 36, a sixth shaft 37, a first accommodating groove 38, a second accommodating groove 39, a screw rod 40, a push block 41 and a rotary disc.

Detailed Description

The technical solution of the present invention is further explained in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 3, the invention discloses a detection method for measuring the four-way stiffness of an elastic joint by one-time clamping, which comprises the steps of arranging a first clamp 3 and a second clamp 4, clamping the first clamp 3 on a tooling ring 2 on an outer sleeve of the elastic joint, clamping the second clamp 4 on a mandrel 111 of the elastic joint, and enabling the first clamp 3 and the second clamp 4 to move relatively; by keeping the second clamp 4 fixed, controlling the first clamp 3 to move back and forth along the radial direction (Z direction) of the elastic joint or controlling the first clamp 3 to rotate along the deflection direction (B direction) of the elastic joint, so that relative motion is generated between the outer sleeve and the mandrel of the elastic joint to measure the radial stiffness and the deflection stiffness of the elastic joint; by keeping the first clamp 3 fixed, the second clamp 4 is controlled to move back and forth along the axial direction (X direction) of the elastic joint or the second clamp 4 is controlled to rotate along the torsion direction (A direction) of the elastic joint, so that relative motion is generated between the outer sleeve and the mandrel of the elastic joint, and the axial stiffness and the torsion stiffness of the elastic joint are measured. The tool ring on the outer sleeve of the elastic joint and the mandrel of the elastic joint are respectively clamped by the first clamp and the second clamp so as to carry out one-time clamping, after the clamping is finished, the first clamp and the second clamp are controlled to be matched with each other to drive the outer sleeve of the elastic joint and the mandrel to generate relative motion, and in the process of generating the relative motion of the outer sleeve of the elastic joint and the mandrel, the four-way rigidity of the elastic joint, such as the axial rigidity, the radial rigidity, the torsional rigidity, the deflection rigidity and the like, is tested. The invention can test the four-way rigidity of the elastic joint, such as axial rigidity, radial rigidity, torsional rigidity, deflection rigidity and the like, only by once clamping, thereby improving the detection efficiency and meeting the current detection requirement; the detection steps are convenient and simple, and the labor intensity of operators is reduced; the detection deviation is small, and the accuracy of the detection result is improved.

Specific embodiments of the invention are described below:

the first embodiment is as follows: as shown in fig. 4, the first clamp 3 and the second clamp 4 are arranged in a crisscross manner, and the elastic joint 1 is arranged at the position of the crisscross point of the first clamp 3 and the second clamp 4. As shown in fig. 5, the first clamp 3 includes a U-shaped frame 311 and a pressing block 312, as shown in fig. 6, the elastic joint 1 is placed in a U-shaped opening of the U-shaped frame 311, the pressing block 312 is locked on the U-shaped opening of the U-shaped frame 311 by a first screw 5, the pressing block 312 is in contact with the tooling ring 2 on the outer sleeve of the elastic joint 1, so that the pressing block 312 is used to press the elastic joint 1 in the U-shaped opening of the U-shaped frame 311, and thus the tooling ring 2 on the outer sleeve of the elastic joint 1 is clamped by the first clamp 3.

Firstly, introducing the structure of a first clamp 3: as shown in fig. 7, an arc pad 6 is further disposed in the U-shaped opening of the U-shaped frame 311, an outer circumferential surface of the arc pad 6 contacts with an inner circumferential surface of the U-shaped opening of the U-shaped frame 311, a tooling ring 2 on an outer sleeve of the elastic joint 1 is placed on the inner circumferential surface of the arc pad 6, and the pressing block 312 presses the elastic joint 1 against the arc pad 6. Because the arc-shaped pad 6 can be disassembled and assembled, when the tested elastic joint 1 is different in model specification and size, the arc-shaped pad 6 with different specifications and sizes is replaced, so that the position of the elastic joint 1 in the U-shaped opening of the U-shaped frame 311 can be adjusted, and the detection precision is ensured. The lower end face of the pressing block 312 is set to be the conical surface 7, and the conical lower end face of the pressing block 312 is in contact with the tooling ring 2 on the outer sleeve of the elastic joint 1, so that the elastic joint 1 can be easily positioned and compressed. As shown in fig. 5 and 6, since the U-shaped frame 311 has a U-shaped opening, in order to further ensure the strength of the U-shaped frame 311, a detachable reinforcing connecting plate 8 is further disposed on the U-shaped opening of the U-shaped frame 311, and after the pressing block 312 presses the elastic joint 1, the reinforcing connecting plate 8 is locked on the U-shaped opening of the U-shaped frame 311 by the second screw 9. The two opposite side ends of the U-shaped frame 311 are respectively provided with a first shaft 10 and a second shaft 11, the axes of the first shaft 10 and the second shaft 11 are both axes E, the axes E are in the same position, the axes E of the first shaft 10 and the second shaft 11 and the axis D of the compressed elastic joint 1 are in the same horizontal plane, and the axes E and the axes D are perpendicular to each other. The first shaft 10 and the second shaft 11 are respectively connected with a first power loading detection system, which will be described in detail later. When the test is carried out, the clamp I3 can integrally move along the axis E or rotate around the axis E, so that the aim of testing the rigidity is fulfilled. The U-shaped frame 311 is provided with a frame through hole, which in this embodiment includes a first frame through hole 3111 and a second frame through hole 3112, the frame through hole is used as a space interlaced with the second clamp 4, and the frame through hole is rectangular, and the length direction of the frame through hole extends along the radial direction of the elastic joint, so that a sufficient movement space is provided for the clamps during the test operation, and the two clamps are prevented from interfering with each other.

Next, the structure of the second clamp 4 is introduced: as shown in fig. 8 and 9, the second fixture 4 includes a rectangular frame 411 and a cross beam, the cross beam includes a first cross beam 412 and a second cross beam 413, the first cross beam 412 and the second cross beam 413 are disposed inside the rectangular frame 411 and connected to the rectangular frame 411, and a mandrel clamping mechanism 12 is disposed on the first cross beam 412 and the second cross beam 413 and used for clamping two ends of a mandrel of the elastic joint 1.

Mandrel holder mechanism 12 is provided in two configurations, one configuration being described in this embodiment and the other configuration being described in the next embodiment. Taking the mandrel clamping mechanism on the first beam 412 as an example, as shown in fig. 10, the mandrel clamping mechanism 12 includes a first pressing block 121, a second pressing block 122, a first pressing block 123 and a second pressing block 124 which are arranged on the beam, a beam groove 13 is formed on the top of the beam, the opening of the beam groove 13 faces upward, the first pressing block 121, the second pressing block 122, the first pressing block 123 and the second pressing block 124 are all arranged in the beam groove 13, one sides of the first pressing block 121 and the second pressing block 122 are respectively in contact with two inner side surfaces of the beam groove 13, the other sides of the first pressing block 121 and the second pressing block 122 are respectively provided with a pressing block inclined surface 14, one sides of the first pressing block 123 and the second pressing block 124 are respectively provided with a pressing block inclined surface 15, the pressing block inclined surface 14 of the first pressing block 121 is in contact with the pressing block inclined surface 15 of the first pressing block 123, the pressing block inclined surface 14 of the second pressing block 122 is in contact with the pressing block inclined surface 15 of the second pressing block 124, by controlling the first pressing block 121 and the second pressing block 122 to move downward, therefore, the pressing block I123 and the pressing block II 124 move relatively close to each other by utilizing the inclined surface matching of the pressing block and the pressing block, and the mandrel of the elastic joint 1 is clamped. In the embodiment, the third screw 16 and the fourth screw 17 respectively penetrate through the first pressing block 121 and the second pressing block 122 and are screwed into the inner bottom surface of the beam groove 13 to control the first pressing block 121 and the second pressing block 122 to move downwards, that is, when the first pressing block 121 and the second pressing block 122 need to be controlled to move downwards, the third screw 16 and the fourth screw 17 are screwed, and the first pressing block 121 and the second pressing block 122 can be driven to move downwards along the two inner side surfaces of the beam groove 13 through the nuts of the third screw 16 and the fourth screw 17. When the mandrel of the elastic joint is clamped, in the present embodiment, preferably, a first spacer 18 and a second spacer 19 are further provided between the first pressing block 123 and the second pressing block 124, and the mandrel of the elastic joint 1 is clamped by the first spacer 18 and the second spacer 19. The mandrel is clamped as shown in figure 11 (the screw is not shown in the figure).

As shown in fig. 12, a waist hole 20 is formed in the rectangular frame 411, and screws five are inserted through the waist hole 20 and screwed into the beam end, thereby connecting the two ends of the beam in the rectangular frame 411. Therefore, the positions of the cross beams in the rectangular frame 411 can be adjusted, when the lengths of the elastic joints 1 are different, the two cross beams can be adjusted to be suitable positions and then are connected in the rectangular frame in a locking mode, and universality is improved. In this embodiment, as shown in fig. 9, the rectangular frame 411 includes a long frame side 4111 and a wide frame side 4112, the long frame side 4111 is disposed in a direction parallel to the axis of the elastic joint, the waist hole 20 is disposed on a side of the long frame side 4111, and the length direction of the waist hole 20 is parallel to the axis of the elastic joint. As shown in fig. 12 and 13, in the present embodiment, T-shaped vertical through holes 21 are provided at both ends of the beam, T-shaped nuts are installed in the T-shaped vertical through holes 21, and during connection, screws five are inserted through the waist holes 20 and screwed into the T-shaped nuts, so as to connect both ends of the beam in the rectangular frame 411. Set up like this for the crossbeam is not only adjusting along 20 length direction in waist hole, can also adjust along vertical, has further improved the commonality.

As shown in fig. 9, two sides of the rectangular frame 411, that is, the wide frame 4112, are respectively provided with a shaft three 22 and a shaft four 23, the axes of the shaft three 22 and the shaft four 23 are both axes F, and in the coaxial position, the axes F of the shaft three 22 and the shaft four 23 and the axis D of the clamped elastic joint 1 coincide with each other, that is, the axes of the shaft three 22, the shaft four 23 and the elastic joint 1 coincide with each other. The third shaft 22 and the fourth shaft 23 are respectively connected with a second power loading detection system, which will be described in detail later. When the test is carried out, the second clamp 4 can integrally move along the axis F or rotate around the axis F, so that the purpose of testing the rigidity is achieved.

Referring to the structure that the first fixture 3 and the second fixture 4 are arranged in a crisscross manner, as shown in fig. 4, 6 and 9, when the first fixture 3 and the second fixture are arranged in a crisscross manner, the long frame edge 4111 of the rectangular frame 411 of the second fixture 4 passes through the frame through hole on the U-shaped frame 311 of the first fixture 3, that is, the two long frame edges 4111 partially pass through the frame through hole one 3111 and the frame through hole two 3112; the first beam 412 and the second beam 413 of the second clamp 4 are respectively located at two sides of the U-shaped frame 311. Thus, as shown in fig. 4, in the detection process, when the second clamp 4 is kept stationary, the first clamp 3 is controlled to move back and forth along the axis E of the first shaft 10 and the second shaft 11 in the first clamp 3 (the radial Z direction of the elastic joint) or the first clamp 3 is controlled to rotate around the axis E of the first shaft 10 and the second shaft 11 in the first clamp 3 (the deflection B direction of the elastic joint), so that the first clamp 3 drives the outer sleeve of the elastic joint to move, and relative motion is generated between the outer sleeve of the elastic joint and the mandrel, so as to measure the radial stiffness and the deflection stiffness of the elastic joint; when the first clamp 3 is kept fixed, the second clamp 4 is controlled to move back and forth (in the axial X direction of the elastic joint) along the axis F of the third shaft 22 and the fourth shaft 23 in the second clamp 4 or the second clamp 4 is controlled to rotate (in the torsion A direction of the elastic joint) along the axis F of the third shaft 22 and the fourth shaft 23 in the second clamp 4, so that the mandrel of the elastic joint is driven to move through the second clamp 4, and the outer sleeve and the mandrel of the elastic joint are enabled to move relatively to measure the axial stiffness and the torsion stiffness of the elastic joint.

The following describes a power loading detection system connected with a first shaft and a second shaft of a first clamp: as shown in fig. 14 and 15, the first shaft 10 and the second shaft 11 of the first clamp 3 pass through the first shaft support seat 24 and the second shaft support seat 25, respectively, the first shaft support seat 24 and the second shaft support seat 25 support the first shaft 10 and the second shaft 11, respectively, and the first shaft 10 can move back and forth along the first shaft support seat 24 in the direction of the axis E or can rotate along the first shaft support seat 24 in the direction of the axis E, and the second shaft 11 can move back and forth along the second shaft support seat 25 in the direction of the axis E or can rotate along the second shaft support seat 25 in the direction of the axis E. In this embodiment, linear bearings are installed in the first shaft support seat 24 and the second shaft support seat 25, and the first shaft 10 and the second shaft 11 are respectively connected with the linear bearings through the linear bearings in the first shaft support seat 24 and the second shaft support seat 25 in a matching manner.

The dynamic loading detection system comprises a deflection loading detection device 26 and a radial loading detection device 27; the first shaft 10 passing through the first shaft support 24 is connected to a deflection loading detection device 26, and the second shaft 11 passing through the second shaft support 25 is connected to a radial loading detection device 27.

As shown in fig. 16, the deflection loading detection device 26 comprises a servo motor one 261 and a torque sensor one 262, wherein an output shaft of the servo motor one 261 is connected with a shaft one 10 penetrating through a shaft support seat one 24 through the torque sensor one 262; the first servo motor 261 is slidably connected to the base platform 28 via a first rail-slider mechanism 263. As shown in fig. 17, the radial load detection device 27 includes a first linear load power device 271 and a first axial one-way coupling 272, the first linear load power device 271 may adopt an air cylinder, a hydraulic cylinder or an electric cylinder, the first linear load power device 271 is hinged on the base platform 28, the second shaft 11 penetrating through the second shaft support seat 25 is connected with one side of the first force sensor 29, the deflection load detection device 26 further includes a fifth shaft 30, one end of the fifth shaft 30 is connected with the other side of the first force sensor 29, and the other end of the fifth shaft 30 is connected with the first output shaft of the first linear load power device 271 through the first axial one-way coupling 272. The first axial one-way coupling 272 is characterized by transmitting only axial loads and not radial and torsional loads. As shown in fig. 18, the connection structure here is embodied such that an end flange one 301 is provided on the other end of the shaft five 30, an end flange II 27111 is arranged at the end part of the output shaft I2711 of the linear load power device I271, the first axial one-way coupler 272 comprises a coupler housing 2721, the coupler housing 2721 is columnar, a first bore 2722 and a second bore 2723 are formed on opposite sides of the coupling housing 2721, an internal groove 2724 is formed inside the coupler housing 2721, the internal groove 2724 is formed in a whole circle along the circumferential direction of the coupler housing 2721, the other end of the shaft five 30 and the output shaft one 2711 of the linear load power device one 271 respectively extend into the coupler housing 2721 from the first hole 2722 and the second hole 2723, such that the first end flange 301 and the second end flange 27111 are positioned within the internal recess 2724, thereby connecting the other end of the shaft five 30 with the output shaft one 2711 of the linear load power device one 271 through the axial one-way coupling one 272. Thus, axial loads can be transmitted between the fifth shaft 30 and the first output shaft 2711 of the first linear load power device 271; however, in the case of the radial and torsional loads, the radial and torsional loads cannot be transmitted between the shaft five 30 and the output shaft one 2711 because the shaft five 30 and the output shaft one 2711 are of a split structure.

As shown in fig. 15, when the radial stiffness is specifically detected: keeping the second clamp 4 fixed, so that the mandrel 111 of the elastic joint 1 is fixed, controlling the first output shaft 2711 of the first linear load power device 271 to do linear motion along the shaft E, and further driving the fifth shaft 30, the second shaft 11, the U-shaped frame 311, the first shaft 10 and the first servo motor 261 to do linear motion in sequence, wherein the U-shaped frame 311 is connected with the outer sleeve 112 of the elastic joint 1, so that the outer sleeve 112 also does linear motion along the shaft E, so that the outer sleeve of the elastic joint and the mandrel generate relative motion to measure the radial stiffness of the elastic joint;

specifically, when the deflection stiffness is detected: and keeping the second clamp 4 fixed, so that the mandrel 111 of the elastic joint 1 is fixed, and controlling the output shaft of the first servo motor 261 to rotate around the shaft E, thereby sequentially driving the first shaft 10, the U-shaped frame 311, the second shaft 11 and the fifth shaft 30 to rotate, and under the action of the first axial one-way coupling 272, the first output shaft 2711 of the first linear load power device 271 cannot rotate. Since the U-shaped frame 311 is connected to the outer sleeve 112 of the elastic joint 1, the outer sleeve 112 is also rotated around the axis E to a certain degree, so that relative movement is generated between the outer sleeve and the mandrel of the elastic joint to measure the deflection stiffness of the elastic joint.

Secondly, a second power loading detection system connected with a third shaft and a fourth shaft of the second clamp is introduced: as shown in fig. 14 and 15, the shaft three 22 and the shaft four 23 of the jig two 4 pass through the shaft support base three 31 and the shaft support base four 32, respectively, the shaft three 31 and the shaft support base four 32 support the shaft three 22 and the shaft four 23, respectively, and the shaft three 22 can move back and forth along the shaft support base three 31 in the direction of the axis F or can rotate in the direction of the axis F along the shaft support base three 31, and the shaft four 23 can move back and forth along the shaft support base four 32 in the direction of the axis F or can rotate in the direction of the axis F along the shaft support base four 32. In the present embodiment, linear bearings are installed in the shaft support base three 31 and the shaft support base four 32, and the shaft three 22 and the shaft four 23 are respectively connected to the linear bearings through the linear bearings in the shaft support base three 31 and the shaft support base four 32. The main cooperation principle of setting up between axle one to four and axle supporting seat one to four just makes the axle pass axle supporting seat after, axle itself both can follow axial displacement or rotate round the axis, can restrict the radial movement of axle itself again through axle supporting seat.

The second dynamic loading detection system comprises a torsion loading detection device 33 and an axial loading detection device 34; the third shaft 22 passing through the third shaft support seat 31 is connected with a torsion loading detection device 33, and the fourth shaft 23 passing through the fourth shaft support seat 32 is connected with an axial loading detection device 34.

The torsion loading detection device 33 and the deflection loading detection device 26 are identical in structure, that is, as shown in fig. 15, the torsion loading detection device 33 comprises a second servo motor 331 and a second torque sensor 332, and an output shaft of the second servo motor 331 is connected with a third shaft 22 passing through a third shaft support seat 31 through the second torque sensor 332; the second servo motor 331 is slidably connected with the base platform 28 through a second guide rail sliding block mechanism 333. The axial load detection device 34 and the radial load detection device 27 have the same structure, that is, as shown in fig. 15, the axial load detection device 34 includes a second linear load power device 341 and a second axial one-way coupling 342, the second linear load power device 341 may be an air cylinder, a hydraulic cylinder or an electric cylinder, the second linear load power device 341 is hinged on the base platform 28, a fourth shaft 23 passing through a fourth shaft support seat 32 is connected to one side of a second force sensor 35, the axial load detection device 34 further includes a sixth shaft 36, one end of the sixth shaft 36 is connected to the other side of the second force sensor 35, and the other end of the sixth shaft 36 is connected to the second output shaft of the second linear load power device 341 through the second axial one-way coupling 342. The second axial one-way coupling 342 and the first axial one-way coupling 272 have the same structure and are also characterized by only transmitting axial load and not transmitting radial and torsional load. The specific connection structure here is: set up tip flange three on the other end of axle six, be provided with tip flange four on the tip of output shaft two of linear load power device two, axial one-way coupling two includes the shaft coupling casing, the shaft coupling casing is the column open respectively hole three and hole four on the relative both sides of shaft coupling casing the inside recess that is provided with of shaft coupling casing, inside recess is provided with a whole circle along the circumference of shaft coupling casing, and the other end of axle six and the output shaft two of linear load power device two stretch into the shaft coupling casing from hole three and hole four respectively, thereby make tip flange three and tip flange four are located in the inside recess to be connected the other end of axle six with output shaft two of linear load power device two through axial one-way coupling two. Therefore, the axial load can be transmitted between the sixth shaft and the second output shaft of the second linear load power device; however, if the load is radial and torsional, the shaft six and the output shaft two are in a split structure, so that the radial and torsional loads cannot be transmitted between the shaft six and the output shaft two.

As shown in fig. 15, when the axial stiffness is specifically detected: keeping the first fixture 3 fixed, so that the outer sleeve 112 of the elastic joint 1 is fixed, controlling the second output shaft 3411 of the second linear load power device 341 to perform linear motion along the shaft F, thereby sequentially driving the sixth shaft 36, the fourth shaft 23, the rectangular frame 411, the third shaft 22 and the second servo motor 331 to perform linear motion, and as the rectangular frame 411 is connected with the mandrel 111 of the elastic joint 1, the mandrel 111 also performs linear motion along the shaft F, so that the outer sleeve and the mandrel of the elastic joint generate relative motion, so as to measure the axial stiffness of the elastic joint;

specifically, when the torsional rigidity is measured: and keeping the first clamp 3 fixed, so that the outer sleeve 112 of the elastic joint 1 is fixed, controlling the output shaft of the second servo motor 331 to rotate around the shaft F, thereby sequentially driving the third shaft 22, the rectangular frame 411, the fourth shaft 23 and the sixth shaft 36 to rotate, and under the action of the second axial one-way coupling 342, the second output shaft 3411 of the second linear load power device 341 cannot rotate. Since the rectangular frame 411 is connected to the mandrel 111 of the elastic joint 1, the mandrel 111 is also rotated around the axis F to a certain degree, so that relative movement is generated between the outer sleeve and the mandrel of the elastic joint to measure the torsional rigidity of the elastic joint.

The embodiment can be further improved, and automatic operation is realized, namely, a pre-programmed automatic detection program is started, and the radial loading detection device, the axial loading detection device, the deflection loading detection device and the torsion loading detection device are sequentially and independently loaded according to a preset program, so that the elastic joint is deformed, related load and displacement data in the deformation process are acquired and processed through the data acquisition system, and then the rigidity result is obtained through automatic calculation and judgment is made.

Example two: compared with the first embodiment, the differences are that: the mandrel clamping mechanism 12 on the second clamp 4 is different in structure. As shown in fig. 19 and fig. 20, taking the mandrel clamping mechanism on the beam two 413 as an example, the mandrel clamping mechanism 12 includes a first pressing block 121 and a second pressing block 122 disposed on the beam, a beam groove 13 is opened on one side portion of the beam, the opening of the beam groove 13 faces the mandrel axis direction of the elastic rubber joint, two sides of the beam groove 13 are provided as inclined surfaces, one side surfaces of the first pressing block 121 and the second pressing block 122 are also provided as inclined surfaces, the inclined side surfaces of the first pressing block 121 and the second pressing block 122 are respectively in fit contact with the inclined surfaces on two sides of the beam groove 13, a first accommodating groove 37 and a second accommodating groove 38 are respectively disposed on the first pressing block 121 and the second pressing block 122 near the bottom position in the beam groove 13, the openings of the first accommodating groove 37 and the second accommodating groove 38 face to be oppositely disposed, so that the first accommodating groove 37 and the second accommodating groove 38 form an accommodating space, a threaded hole is disposed on the other side portion of the beam, the screw rod 39 passes through the threaded hole to be connected with the push block 40, and the push block 40 is located in the accommodating space. When the screw 39 is rotated, the push block 40 pushes the first press block 121 and the second press block 122 to move along the two sides of the beam groove 13, and since the inclined side surfaces of the first press block 121 and the second press block 122 are in fit contact with the inclined surfaces of the two sides of the beam groove 13, the first press block 121 and the second press block 122 gradually approach to clamp the spindle 111 of the elastic joint 1, and finally the spindle 111 of the elastic joint 1 is clamped. To facilitate turning of the screw 39, a turntable 41 may be provided on one end of the screw 39. When the mandrel of the elastic joint is clamped, in the present embodiment, it is preferable that a first cushion block 18 and a second cushion block 19 are further provided between the first pressing block 121 and the second pressing block 122, and the mandrel of the elastic joint 1 is clamped by the first cushion block 18 and the second cushion block 19. The mandrel is clamped as shown in figure 20.

In conclusion, the two clamps are arranged to clamp the mandrel of the elastic joint and the tool ring on the outer sleeve respectively, and can move relatively; the two clamps are utilized to act in a matching manner, so that relative motion is generated between the outer sleeve of the elastic joint and the mandrel, and the four-way rigidity of the elastic joint, such as radial rigidity, deflection rigidity, axial rigidity, torsional rigidity and the like, is measured. Furthermore, regarding the elastic joint to carry out tension and compression loading, the existing test method has the defects of complex and time-consuming tool clamping and connection, low detection accuracy, repeated disassembly, assembly and inspection and wiping, and low efficiency. The elastic joint one-time clamping detection method is naturally suitable for tension and compression bidirectional loads, so that the effect of improving the efficiency is more obvious for detection of the type. The detection efficiency can be improved by at least 200%, even 500% or more, and the detection accuracy can be ensured, so that the detection capability of the elastic joint part is improved, and the development of the whole industry is positively influenced. The first clamp and the second clamp are arranged in a crossed and staggered manner, and the elastic joint is arranged at the position of the crossed point of the first clamp and the second clamp, so that the characteristic of relative motion between the two clamps is realized, and the normal operation of four-way rigidity detection is ensured. Through the specific structural design of the two clamps, the structure that the first clamp and the second clamp are arranged in a crossed and staggered mode is realized, and the smooth four-way rigidity detection is guaranteed on the premise that the outer sleeve and the mandrel of the elastic joint are respectively clamped through the two clamps. Through the specific design of the power loading detection system, the operation process of clamping can be standardized and automated, and the detection efficiency is high; and the detection result completely depends on the structure and the precision of the equipment, and is hardly influenced by the experience and the capability of detection personnel.

The term "plurality" as used in the above embodiments means a number of "two or more". The above embodiments are provided for illustrative purposes only and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should fall within the scope of the present invention, and the scope of the present invention should be defined by the claims.

Claims

1. The detection method for measuring the four-way rigidity of the elastic joint by one-time clamping is characterized by comprising the following steps: the fixture comprises a first fixture and a second fixture, wherein the first fixture clamps a tooling ring on an elastic joint outer sleeve, the second fixture clamps a mandrel of an elastic joint, and the first fixture and the second fixture can move relatively; by keeping the second clamp fixed, controlling the first clamp to move back and forth along the radial direction of the elastic joint or controlling the first clamp to rotate along the deflection direction of the elastic joint, so that relative motion is generated between the outer sleeve and the mandrel of the elastic joint to measure the radial stiffness and the deflection stiffness of the elastic joint; and by keeping the first clamp fixed, controlling the second clamp to move back and forth along the axial direction of the elastic joint or controlling the second clamp to rotate along the torsion direction of the elastic joint, so that relative motion is generated between the outer sleeve of the elastic joint and the mandrel, and the axial stiffness and the torsion stiffness of the elastic joint are measured.

2. The detection method according to claim 1, characterized in that: and arranging the first clamp and the second clamp in a crossed staggered manner, wherein the elastic joint is arranged at the position of the crossed point of the first clamp and the second clamp.

3. The detection method according to claim 2, characterized in that: setting the first clamp and the second clamp into a frame structure, wherein a frame through hole is formed in the first clamp and comprises a first frame through hole and a second frame through hole; when the first clamp and the second clamp are arranged in a staggered mode, the frame edges on two opposite sides of the second clamp respectively penetrate through the frame through hole I and the frame through hole II on the first clamp, and therefore the first clamp and the second clamp are arranged in a staggered mode.

4. The detection method according to any one of claims 1, 2 or 3, wherein: a first shaft and a second shaft are respectively arranged on two opposite sides of the first clamp frame structure, and a third shaft and a fourth shaft are respectively arranged on two opposite sides of the second clamp frame structure; the first shaft and the second shaft are connected with a power loading detection system, and the third shaft and the fourth shaft are connected with a power loading detection system II;

5. The detection method according to claim 4, characterized in that: respectively enabling a first shaft and a second shaft of the first clamp to penetrate through a first shaft supporting seat and a second shaft supporting seat, wherein the power loading detection system comprises a deflection loading detection device and a radial loading detection device; a first shaft penetrating through the first shaft supporting seat is connected with the deflection loading detection device, and a second shaft penetrating through the second shaft supporting seat is connected with the radial loading detection device;

when detecting the radial stiffness: the mandrel of the elastic joint is fixed by keeping the power loading detection system II inactive and keeping the clamp II stationary, and the output shaft I of the linear loading power device I is controlled to do linear motion, so that the shaft V, the shaft II, the U-shaped frame, the shaft I and the servo motor I are sequentially driven to do linear motion;

6. The detection method according to claim 4, characterized in that: respectively penetrating a third shaft and a fourth shaft of the second clamp through a third shaft supporting seat and a fourth shaft supporting seat, wherein the second power loading detection system comprises a torsion loading detection device and an axial loading detection device; a third shaft penetrating through the third shaft supporting seat is connected with the torsion loading detection device, and a fourth shaft penetrating through the fourth shaft supporting seat is connected with the axial loading detection device;

the axial loading detection device comprises a linear load power device II, an axial one-way coupling II and a shaft six, wherein the linear load power device II is hinged on the base platform, and the axial one-way coupling II only transmits axial load but does not transmit radial and torsional load; when in connection, a shaft IV penetrating through the shaft support seat IV is connected with one side of the force sensor II, one end of a shaft VI is connected with the other side of the force sensor II, and the other end of the shaft VI is connected with an output shaft II of the linear load power device II through an axial one-way coupling II;

when the torsional rigidity is detected: the outer sleeve of the elastic joint is fixed by keeping the power loading detection system I inactive and keeping the clamp I fixed, the output shaft of the servo motor II is controlled to rotate, so that the shaft III, the rectangular frame, the shaft IV and the shaft VI are sequentially driven to rotate, and the rectangular frame is connected with the mandrel of the elastic joint, so that the mandrel can rotate, the outer sleeve of the elastic joint and the mandrel can move relatively, and the torsional rigidity of the elastic joint can be measured.

7. A check out test set of clamping survey elastic joint quadriversal rigidity which characterized in that: the elastic joint measuring device comprises a first clamp and a second clamp, wherein the first clamp is used for clamping a tooling ring on an elastic joint outer sleeve, the second clamp is used for clamping a mandrel of an elastic joint, the first clamp and the second clamp are arranged in a cross-shaped staggered mode, the elastic joint is clamped at the position of the staggered point of the first clamp and the second clamp, the first clamp and the second clamp can move relatively and rotate along the radial direction of the elastic joint or along the deflection direction of the elastic joint, the second clamp can move back and forth along the axial direction of the elastic joint or rotate along the torsion direction of the elastic joint, and the first clamp and the second clamp are matched with each other to measure the radial rigidity, deflection rigidity, axial rigidity and torsion rigidity of the elastic joint.

8. The detection apparatus according to claim 7, wherein: the first clamp comprises a U-shaped frame and a pressing block, the elastic joint is placed in a U-shaped opening of the U-shaped frame, the pressing block is locked on the U-shaped opening of the U-shaped frame, and the pressing block is in contact with a tooling ring on an outer sleeve of the elastic joint, so that the elastic joint is pressed in the U-shaped opening of the U-shaped frame by the pressing block; the second fixture comprises a rectangular frame and a cross beam, the cross beam comprises a first cross beam and a second cross beam, the first cross beam and the second cross beam are arranged in the rectangular frame and connected with the rectangular frame, and a mandrel clamping mechanism is arranged on the first cross beam and the second cross beam and used for clamping two ends of a mandrel of the elastic joint.

9. The detection apparatus according to claim 8, wherein: dabber fixture is including setting up briquetting I, briquetting II, compact heap one and compact heap two on the crossbeam, and it has the crossbeam recess to open on the top of crossbeam, and the opening of crossbeam recess is up, and briquetting I, briquetting II, compact heap one and compact heap two all set up in the crossbeam recess, one side of briquetting I and briquetting II contacts with two medial surfaces of crossbeam recess respectively, and other one side of briquetting I and briquetting II all is provided with the briquetting inclined plane, and one side of compact heap I and compact heap two all is provided with the compact heap inclined plane, and the briquetting inclined plane of briquetting I contacts with the compact heap inclined plane of compact heap I, and the briquetting inclined plane of briquetting II contacts with the compact heap inclined plane of compact heap two.

10. The detection apparatus according to claim 8, wherein: the mandrel clamping mechanism comprises a first pressing block and a second pressing block which are arranged on a cross beam, a cross beam groove is formed in one side portion of the cross beam, the opening of the cross beam groove faces to the axis direction of the mandrel of the elastic rubber joint, two side edges of the cross beam groove are arranged to form inclined planes, one side face of the first pressing block and one side face of the second pressing block are also arranged to form inclined planes, the inclined side faces of the first pressing block and the second pressing block are respectively in matched contact with the inclined planes of the two side edges of the cross beam groove, a first containing groove and a second containing groove are respectively arranged on the first pressing block and the second pressing block which are close to the bottom position in the cross beam groove, the opening orientations of the first containing groove and the second containing groove are oppositely arranged, so that the first containing groove and the second containing groove form a containing space, a threaded hole is formed in the other side portion of the cross beam, a screw rod penetrates through the threaded hole to be connected with a pushing block, and the pushing block is located in the containing space.