CN116625855B - Electrohydraulic servo fatigue testing machine - Google Patents
Electrohydraulic servo fatigue testing machine Download PDFInfo
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- CN116625855B CN116625855B CN202310907957.3A CN202310907957A CN116625855B CN 116625855 B CN116625855 B CN 116625855B CN 202310907957 A CN202310907957 A CN 202310907957A CN 116625855 B CN116625855 B CN 116625855B
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 17
- 230000004224 protection Effects 0.000 claims abstract description 114
- 238000001514 detection method Methods 0.000 claims abstract description 77
- 230000005540 biological transmission Effects 0.000 claims description 48
- 230000007246 mechanism Effects 0.000 claims description 23
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 8
- 238000009792 diffusion process Methods 0.000 abstract description 6
- 230000001681 protective effect Effects 0.000 abstract description 4
- 230000008602 contraction Effects 0.000 abstract 1
- 230000000670 limiting effect Effects 0.000 description 11
- 238000012360 testing method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000003068 static effect Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 230000009979 protective mechanism Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000004642 transportation engineering Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an electrohydraulic servo fatigue testing machine, and relates to the field of component detection. According to the invention, the cylindrical protection structure is formed by the plurality of protection rings to enclose and protect the detection component, when the detection component is broken and flies under pressure in the detection process, the cylindrical protection structure can block down the flying detection component so as to prevent the detection component from flying to the periphery to smash detection equipment or staff, so that the equipment can be prevented from being damaged by collision, and the safety of the detection of the component is improved; through the cooperation of holder, drive assembly and lift drive assembly, can the diffusion of automatic drive a plurality of protection rings remove the protective structure who forms the cylinder when the centre gripping detects the part, and when detecting the completion and loosen the centre gripping to detecting the part, drive a plurality of protection rings automatic contraction is closed for the protection ring no longer encloses detecting the part and blocks, thereby makes things convenient for the staff to take off the part that has detected, is convenient for follow-up continuation to place simultaneously and presss from both sides dress new detecting part.
Description
Technical Field
The invention belongs to the field of structural part testing, and particularly relates to an electrohydraulic servo fatigue testing machine.
Background
The electrohydraulic servo fatigue tester is a physical performance tester for civil engineering and construction engineering and transportation engineering, and is mainly used for testing dynamic and static mechanical performance of various materials, parts, elastic bodies, rubber elastic bodies and vibration dampers. The method can be used for carrying out stretching, compression, bending, low-cycle and high-cycle fatigue, crack propagation and fracture mechanical tests under sine waves, triangular waves, square waves, trapezoidal waves, oblique waves and user-defined waveforms.
Chinese patent application CN103018020a discloses a fatigue testing machine, including frame, valve block fixed establishment, stamping mechanism, drift actuating mechanism and actuating mechanism adjusting device, valve block fixed establishment sets up and is used for fixed the valve block on the frame, and stamping mechanism is including having the spring force and resumes the drift that the bottom applys pressure to the reed of valve block, the quantity of drift corresponds the quantity of installing the reed on the valve block on valve block fixed establishment, and drift actuating mechanism includes power device, drive shaft and drive wheel, and the drive shaft is rotated by the power device drive, the bottom fixed connection drive wheel of drive shaft, the bottom of drive wheel sets up a plurality of cams, the bottom of cam is less than the top of drift.
The detection component is fixed through the fixing mechanism during detection, and then dynamic pressure or static pressure is applied to the detection component so as to test the component. In the testing process, the component can be deformed along with the application of pressure, when the pressure is large, the testing component is likely to be extruded and broken, and the broken component is easy to splash around under the action of stress, so that equipment is easy to collide and damage or workers are easy to smash, and the component detection process is further enabled to have certain danger.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides an electrohydraulic servo fatigue testing machine, which aims to solve the technical problems that in the fatigue testing process of the related art, a part can deform along with the application of pressure, when the pressure is large, the tested part is likely to be extruded and broken, and the broken part is likely to splash around under the action of stress, so that equipment is likely to be damaged or workers are likely to be crashed.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to an electrohydraulic servo fatigue testing machine, which comprises a frame, wherein a detection mechanism for detecting fatigue of a part is arranged on the frame;
the detection mechanism comprises a lower clamping seat and an upper clamping seat, wherein the lower clamping seat is fixedly arranged on a workbench surface at the upper end of the rack, the upper clamping seat is arranged above the lower clamping seat in a lifting manner, and clamping pieces are arranged in the lower clamping seat and the upper clamping seat;
a protection mechanism for surrounding and protecting the detection part is also arranged between the lower clamping seat and the upper clamping seat;
the protection mechanism comprises a transmission assembly, a lifting driving assembly and a plurality of protection rings, wherein the protection rings are arranged between the lower clamping seat and the upper clamping seat from top to bottom through the lifting driving assembly, and the lifting driving assembly is in transmission connection with the clamping piece through the transmission assembly;
when the part to be detected is clamped and fixed between the lower clamping seat and the upper clamping seat through the clamping piece, the lifting driving assembly drives the plurality of protection rings to synchronously move downwards under the transmission of the transmission assembly, so that the plurality of protection rings move and spread on the periphery of the part to be detected to form a cylindrical protection structure;
when the clamping piece is driven to loosen the clamping of the detected part, the lifting driving assembly drives the plurality of protection rings to synchronously move upwards and reset under the transmission of the transmission assembly, so that the plurality of protection rings gradually move and fold at the periphery of the detected part, and the detected part is not blocked and protected.
Further, a guide post and a hydraulic telescopic shaft are arranged on the frame, a cross beam is slidably arranged at the upper end of the guide post, the end part of the cross beam is fixedly connected with the telescopic end of the top of the hydraulic telescopic shaft, a hydraulic cylinder is fixedly arranged in the middle of the cross beam, and an upper clamping seat is fixedly arranged at the telescopic end of the bottom of the hydraulic cylinder.
Further, the clamping piece comprises a driving shaft and three-jaw chucks, the two three-jaw chucks are respectively arranged in the lower clamping seat and the upper clamping seat, the two driving shafts are respectively rotatably arranged on the side walls of the lower clamping seat and the upper clamping seat and are in transmission connection with the corresponding three-jaw chucks, and the end parts of the driving shafts are provided with inner hexagonal holes.
Further, the lifting driving assembly comprises two cross connecting rods and two telescopic driving units, the two cross connecting rods are respectively installed at two ends of the upper clamping seat through the telescopic driving units, each cross supporting point of each cross connecting rod is connected with the corresponding protection ring, and the two corresponding cross supporting points of the two cross connecting rods are respectively connected to two sides of the same protection ring.
Further, the cross connecting rod comprises a plurality of support plates, a plurality of support shafts and a plurality of connecting shafts, wherein the support plates are movably connected in a cross mode through the support shafts in pairs to form a plurality of cross rods, and the cross rods are sequentially connected in a rotary mode through the connecting shafts;
the inner side end of the support shaft is fixedly provided with a connecting seat, and the inner side end of the connecting seat is fixedly connected with the outer wall of the protection ring.
Further, the telescopic driving unit comprises a ring seat, the ring seat is fixedly arranged at the bottom end of the upper clamping seat and positioned on the outer ring of the three-jaw chuck, two ends of the bottom surface of the ring seat are fixedly provided with supports, and the outer side surface of each support is fixedly provided with a bearing seat;
the bearing seat is rotatably provided with a rotating shaft, two groups of external threads with opposite thread directions are arranged at two ends of the rotating shaft, two sliding blocks are arranged at two ends of the rotating shaft in a threaded transmission mode through the external threads, the outer side faces of the two sliding blocks are respectively and rotatably connected with two connecting shafts at the uppermost ends of the crossed connecting rods, and the inner side faces of the two sliding blocks are slidably arranged on the outer side faces of the support.
Further, the transmission assembly comprises a driving wheel, a transmission belt and two driven wheels, wherein the driving wheel is fixedly arranged on the driving shaft, the two driven wheels are respectively and fixedly arranged on the two rotating shafts, and the driving wheel is in transmission connection with the two driven wheels through the transmission belt.
Further, a limiting ring is fixedly arranged at the top end of the lower clamping seat, the inner diameter of the limiting ring is not smaller than the outer diameter of the protecting ring, and limiting sliding grooves corresponding to the connecting seat are formed in two ends of the limiting ring.
Further, multistage telescopic shafts which are distributed at equal intervals along the circumferential direction are fixedly arranged between the adjacent protection rings.
The invention has the following beneficial effects:
1. according to the invention, the plurality of protection rings are arranged between the lower clamping seat and the upper clamping seat, and are distributed on the periphery of the detection part at equal intervals up and down when the part is detected, so that a cylindrical protection structure is formed on the periphery of the detection part to enclose and protect the detection part, and when the detection part is broken and flies under pressure in the detection process, the cylindrical protection structure can block the flying detection part so as to prevent the detection part from flying and smashing the detection equipment or staff around, prevent the equipment from being damaged by collision, and improve the safety of the detection of the part.
2. According to the invention, when the part to be detected is clamped and fixed between the lower clamping seat and the upper clamping seat through the clamping piece, the lifting driving assembly drives the plurality of protection rings to synchronously move downwards under the transmission of the transmission assembly, so that the plurality of protection rings move and spread on the periphery of the part to be detected to form a cylindrical protection structure, and when the clamping piece is driven to loosen the clamping of the detection part, the lifting driving assembly drives the plurality of protection rings to synchronously move upwards and reset under the transmission of the transmission assembly, so that the plurality of protection rings gradually move and fold on the periphery of the detection part, and the detection part is not blocked and protected; through the cooperation of holder, drive assembly and lift drive assembly, can the diffusion of automatic drive a plurality of protection rings remove when the centre gripping detects the part and form cylindrical protective structure, and when the detection is accomplished and is released the centre gripping to detecting the part, drive a plurality of protection rings shrink automatically and close for the protection ring no longer encloses the detection part and blocks, thereby make things convenient for the staff to take off the detection part that has detected, be convenient for follow-up continuation to place simultaneously and press from both sides dress new detection part, make the diffusion protection and shrink of protection ring close the process more convenient, and then improve the detection efficiency to detection part.
3. According to the invention, the multistage telescopic shafts which are distributed along the circumferential direction at equal intervals are fixedly arranged between the adjacent protection rings, and can be synchronously stretched and elongated when the protection rings move and spread for protection, so that gaps between the adjacent protection rings are protected, broken detection parts are prevented from flying out from the gaps between the adjacent protection rings, the overall protection effect of the protection mechanism is improved, and the stability of the installation of the protection rings can be improved by arranging the plurality of multistage telescopic shafts, and the detection parts are prevented from flying out from the cylindrical protection structure due to collision deformation of the broken detection parts, so that the overall protection effect of the protection mechanism is further improved.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the invention, the drawings that are needed for the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the invention, and that it is also possible for a person skilled in the art to obtain the drawings from these drawings without inventive effort.
FIG. 1 is a schematic diagram of a three-dimensional structure of an electrohydraulic servo fatigue testing machine of the invention;
FIG. 2 is a schematic view of the structure of the present invention shown in FIG. 1 at a partially enlarged scale;
FIG. 3 is a schematic view of the structure of the present invention shown in FIG. 1 at B in a partially enlarged manner;
FIG. 4 is a schematic perspective view of a cross beam of the testing machine of the present invention;
FIG. 5 is a schematic view of the structure of the present invention shown in FIG. 4 at C in an enlarged partial view;
FIG. 6 is a second perspective view of the cross beam of the testing machine of the present invention;
FIG. 7 is a schematic view of a partially enlarged structure of the invention at D of FIG. 6;
FIG. 8 is a schematic diagram of a three-dimensional structure of the electrohydraulic servo fatigue testing machine of the invention in operation.
In the figure: 1. a frame; 2. a detection mechanism; 21. a guide post; 22. a hydraulic telescopic shaft; 23. a lower clamping seat; 24. a cross beam; 25. a hydraulic cylinder; 26. an upper clamping seat; 27. a drive shaft; 28. an inner hexagonal hole; 29. a three-jaw chuck; 3. a protective mechanism; 31. a ring seat; 32. a guard ring; 33. a multi-stage telescopic shaft; 34. a support; 35. a rotating shaft; 36. a driving wheel; 37. a transmission belt; 38. driven wheel; 39. a support plate; 310. a support shaft; 311. a connecting shaft; 312. a limiting ring; 313. limiting sliding grooves; 314. a connecting seat; 315. a bearing seat; 316. a slide block; 317. and (5) external threads.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, based on the embodiments in the invention, which a person of ordinary skill in the art would obtain without inventive faculty, are within the scope of the invention.
In the description of the present invention, it should be understood that the terms "open," "upper," "lower," "top," "middle," "inner," and the like indicate an orientation or positional relationship, merely for convenience of description and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Referring to fig. 1, 2 and 8, the invention relates to an electrohydraulic servo fatigue testing machine, which comprises a frame 1, wherein a detection mechanism 2 for detecting fatigue of a component is arranged on the frame 1; the detection mechanism 2 comprises a lower clamping seat 23 and an upper clamping seat 26, wherein the lower clamping seat 23 is fixedly arranged on a workbench surface at the upper end of the frame 1, the upper clamping seat 26 is arranged above the lower clamping seat 23 in a lifting manner, and clamping pieces are arranged in the lower clamping seat 23 and the upper clamping seat 26; a protection mechanism 3 for surrounding and protecting the detection part is also arranged between the lower clamping seat 23 and the upper clamping seat 26; the protection mechanism 3 comprises a transmission assembly, a lifting driving assembly and a plurality of protection rings 32, wherein the protection rings 32 are arranged between the lower clamping seat 23 and the upper clamping seat 26 from top to bottom through the lifting driving assembly, and the lifting driving assembly is in transmission connection with the clamping piece through the transmission assembly; when the part to be detected is clamped and fixed between the lower clamping seat 23 and the upper clamping seat 26 through the clamping piece, the lifting driving assembly drives the plurality of protection rings 32 to synchronously move downwards under the transmission of the transmission assembly, so that the plurality of protection rings 32 move and spread on the periphery of the part to be detected to form a cylindrical protection structure; when the clamping piece is driven to loosen the clamping of the detected part, the lifting driving assembly drives the plurality of protection rings 32 to synchronously move upwards and reset under the transmission of the transmission assembly, so that the plurality of protection rings 32 gradually move and fold at the periphery of the detected part, and the detected part is not blocked and protected;
the protection rings 32 are installed at the bottom of the upper clamping seat 26 through a lifting driving assembly, and the plurality of protection rings 32 are sequentially arranged below the upper clamping seat 26 in a shrinkage and folding manner, so that clamping of a part to be detected is not affected; during detection, firstly, the bottom end of a part to be detected is placed on the lower clamping seat 23, then the bottom end of the part to be detected is clamped and fixed through a clamping piece in the lower clamping seat 23, then the height of the upper clamping seat 26 is adjusted, the top end of the part to be detected is inserted into the upper clamping seat 26, then the top end of the part to be detected is clamped and fixed through the clamping piece in the upper clamping seat 26, at the moment, the lifting driving assembly drives the plurality of protection rings 32 to synchronously move downwards under the transmission of the transmission assembly, so that the plurality of protection rings 32 move downwards and spread on the periphery of the part to be detected to form a cylindrical protection structure, the part to be detected is subjected to surrounding protection, and finally downward pressure is applied to the part to be detected through the lifting upper clamping seat 26, so that fatigue detection is performed;
when the detection is completed, the clamping piece in the upper clamping seat 26 is driven to loosen the clamping of the top of the detection component, at the moment, the lifting driving component drives the plurality of protection rings 32 to synchronously move upwards and reset under the transmission of the transmission component, so that the plurality of protection rings 32 gradually move upwards and fold on the periphery of the detection component, the detection component is not blocked and protected, and the clamping piece in the lower clamping seat 23 is driven to loosen the clamping of the bottom of the detection component, so that the detected component can be taken out;
according to the invention, the cylindrical protection structure is formed by the plurality of protection rings 32 to enclose and protect the detection component, when the detection component is broken and flies under pressure in the detection process, the cylindrical protection structure can block down the flying detection component so as to prevent the detection component from flying to the periphery to smash detection equipment or staff, so that the equipment can be prevented from being damaged by collision, and the safety of the detection of the component is improved; through the cooperation of holder, drive assembly and lift drive assembly, can the diffusion of automatic drive a plurality of protection rings 32 remove the protective structure who forms the cylinder when the centre gripping detects the part, and when detecting the centre gripping of accomplishing to loosen the detection part, the automatic shrink of drive a plurality of protection rings 32 is closed for protection ring 32 no longer encloses the detection part and blocks, thereby make things convenient for the staff to take off the part that has detected, be convenient for follow-up continuation to place simultaneously and press from both sides dress new detection part, make the diffusion protection of protection ring 32 and shrink close the process more convenient, and then improve the detection efficiency to detection part.
Referring to fig. 1, in one embodiment, a guide post 21 and a hydraulic telescopic shaft 22 are installed on the frame 1, a cross beam 24 is slidably installed at the upper end of the guide post 21, an end of the cross beam 24 is fixedly connected with a telescopic end at the top of the hydraulic telescopic shaft 22, a hydraulic cylinder 25 is fixedly installed in the middle of the cross beam 24, and the upper clamping seat 26 is fixedly installed on a telescopic end at the bottom of the hydraulic cylinder 25;
the frame 1 is internally provided with an electrohydraulic servo control system connected with a hydraulic telescopic shaft 22 and a hydraulic cylinder 25, the electrohydraulic servo control system is used for controlling telescopic adjustment of the hydraulic telescopic shaft 22 and the hydraulic cylinder 25, the bottom end of the lower clamping seat 23 is provided with a fatigue detection sensor, when a part to be detected is clamped, the hydraulic telescopic shaft 22 can drive the cross beam 24 to move up and down along the guide post 21, so that the height of the upper clamping seat 26 is adjusted, the distance between the upper clamping seat 26 and the lower clamping seat 23 is matched with the length of the part to be detected, the part to be detected is clamped between the upper clamping seat 26 and the lower clamping seat 23 conveniently, when the clamped part is subjected to fatigue detection, the hydraulic cylinder 25 is used for driving the upper clamping seat 26 to continuously pressurize downwards, then the upper clamping seat 26 is used for applying downward static pressure to the detecting part, or the hydraulic cylinder 25 is used for driving the upper clamping seat 26 to reciprocate up and down, and then the upper clamping seat 26 is used for applying dynamic pressure to the detecting part in a reciprocating way, and the fatigue detection sensor can receive the pressure born by the detecting part through the lower clamping seat 23, so as to perform fatigue test.
Referring to fig. 1-3, in one embodiment, the clamping member includes a driving shaft 27 and a three-jaw chuck 29, two of the three-jaw chucks 29 are respectively mounted in the lower clamping seat 23 and the upper clamping seat 26, two of the driving shafts 27 are respectively rotatably mounted on side walls of the lower clamping seat 23 and the upper clamping seat 26 and are in transmission connection with the corresponding three-jaw chucks 29, and inner hexagonal holes 28 are formed at ends of the driving shafts 27;
in operation, the hexagonal head of the hexagonal wrench is inserted into the socket 28, and then the driving shaft 27 is rotated by the hexagonal wrench, so that the driving shaft 27 drives the jaws of the three-jaw chuck 29 to move closed or opened.
Referring to fig. 1 and 2, in one embodiment, the lifting driving assembly includes two cross links and two telescopic driving units, the two cross links are respectively mounted at two ends of the upper clamping seat 26 through the telescopic driving units, each cross pivot of the cross links is connected with and mounted on the protection ring 32, and two corresponding cross pivots of the two cross links are respectively connected with two sides of the same protection ring 32;
the cross connecting rod is used as a telescopic piece, so that the protection rings 32 can be sequentially contracted and folded under the drive of the cross connecting rod when being stored, a plurality of protection rings 32 are folded and stacked together, the space occupied by the protection rings 32 is reduced, and the detection component is convenient to clamp and disassemble between the lower clamping seat 23 and the upper clamping seat 26; when the cross connecting rod stretches, the plurality of protection rings 32 can be driven to move in a diffusion mode, the plurality of protection rings 32 are unfolded rapidly to form a cylindrical protection structure, and the unfolded protection rings 32 are distributed evenly and equidistantly, so that gaps between adjacent protection rings 32 are controlled conveniently, and the formed cylindrical protection structure is guaranteed to have a good surrounding protection effect.
Referring to fig. 1-7, in one embodiment, the cross link includes a plurality of support plates 39, a plurality of support shafts 310, and a plurality of connecting shafts 311, wherein the plurality of support plates 39 are movably connected in a cross manner by the support shafts 310 to form a plurality of cross bars, and the plurality of cross bars are sequentially rotatably connected by the connecting shafts 311; a connecting seat 314 is fixedly arranged at the inner side end of the support shaft 310, and the inner side end of the connecting seat 314 is fixedly connected with the outer wall of the protection ring 32; the telescopic driving unit comprises a ring seat 31, the ring seat 31 is fixedly arranged at the bottom end of the upper clamping seat 26 and positioned at the outer ring of the three-jaw chuck 29, two ends of the bottom surface of the ring seat 31 are fixedly provided with a support 34, and the outer side surface of the support 34 is fixedly provided with a bearing seat 315; the bearing seat 315 is rotatably provided with a rotating shaft 35, two groups of external threads 317 with opposite thread directions are arranged at two ends of the rotating shaft 35, two ends of the rotating shaft 35 are respectively provided with a sliding block 316 in a threaded transmission manner through the external threads 317, the outer side surfaces of the two sliding blocks 316 are respectively rotatably connected with two connecting shafts 311 at the uppermost ends of the crossed connecting rods, and the inner side surfaces of the two sliding blocks 316 are respectively slidably arranged on the outer side surfaces of the support 34; the transmission assembly comprises a driving wheel 36, a transmission belt 37 and two driven wheels 38, wherein the driving wheel 36 is fixedly arranged on the driving shaft 27, the two driven wheels 38 are respectively fixedly arranged on the two rotating shafts 35, and the driving wheel 36 and the two driven wheels 38 are in transmission connection through the transmission belt 37;
when the driving shaft 27 on the side wall of the upper clamping seat 26 rotates, the driving wheel 36 is driven to synchronously rotate, then the driving wheel 36 drives the driven wheel 38 to rotate through the driving belt 37, so as to drive the rotating shaft 35 to rotate, and when the rotating shaft 35 rotates, the two sliding blocks 316 are driven to move in opposite directions to close through the external threads 317 at the two ends, and the two support plates 39 in the cross rod are driven to rotate and open in the horizontal direction, at the moment, the cross connecting rod is integrally stretched downwards, and the plurality of protection rings 32 are driven to diffuse and move downwards, so that a cylindrical protection structure is formed between the upper clamping seat 26 and the lower clamping seat 23, and the clamped detection parts are subjected to surrounding protection;
when the parts are detected and the driving shaft 27 on the side wall of the upper clamping seat 26 rotates reversely, the driving shaft 27 drives the driving wheel 36 to rotate reversely synchronously, then the driving wheel 36 drives the driven wheel 38 to rotate reversely through the driving belt 37, so as to drive the rotating shaft 35 to rotate reversely, the two sliding blocks 316 are driven to move reversely to open through the external threads 317 at the two ends when the rotating shaft 35 rotates reversely, the two supporting plates 39 in the cross rod are driven to rotate and fold along the horizontal direction, at the moment, the cross connecting rod integrally contracts upwards, and the plurality of protecting rings 32 are driven to contract upwards and reset, so that the plurality of protecting rings 32 are sequentially folded below the upper clamping seat 26.
Referring to fig. 1-3, in one embodiment, a limiting ring 312 is fixedly mounted on the top end of the lower clamping seat 23, the inner diameter of the limiting ring 312 is not smaller than the outer diameter of the protecting ring 32, and limiting sliding grooves 313 corresponding to the connecting seat 314 are arranged at two ends of the limiting ring 312;
when a plurality of protection rings 32 spread downwards in proper order, the protection ring 32 sliding block of lower extreme is adorned in the inner circle of spacing ring 312, and the connecting seat 314 sliding block at both ends of protection ring 32 is in the spacing spout 313 that corresponds simultaneously to carry out the slip spacing to protection ring 32, improve the stability of the installation of protection ring 32 of lower extreme, and then improve holistic stability and the barrier propterty of cylinder protective structure.
Referring to fig. 1 and 2, in one embodiment, a plurality of telescopic shafts 33 are fixedly installed between adjacent guard rings 32, and are equidistantly distributed along the circumferential direction;
the multistage telescopic shaft 33 can be stretched and elongated synchronously when the guard ring 32 moves and diffuses for protection so as to protect gaps between adjacent guard rings 32, and prevent broken detection components from flying out from gaps between adjacent guard rings 32, so that the overall protection effect of the protection mechanism 3 is improved, and the stability of the installation of the guard rings 32 can be improved by arranging a plurality of multistage telescopic shafts 33, and the guard rings 32 are prevented from being broken due to collision deformation of the broken detection components to cause the detection components to fly out from the cylindrical protection structure, so that the overall protection effect of the protection mechanism 3 is further improved.
The specific working principle is as follows:
firstly, placing the bottom end of a part to be detected on a lower clamping seat 23, rotating a driving shaft 27 on the side wall of the lower clamping seat 23, driving a three-jaw chuck 29 in the lower clamping seat 23 to be gradually folded so as to clamp and fix the bottom end of the part to be detected, driving a cross beam 24 to move downwards along a guide post 21 through a hydraulic telescopic shaft 22, adjusting the height of an upper clamping seat 26, butting the upper clamping seat 26 with the top end of the part to be detected, rotating the driving shaft 27 on the side wall of the upper clamping seat 26, and driving the three-jaw chuck 29 in the upper clamping seat 26 to be gradually folded so as to clamp and fix the top end of the part to be detected;
when the driving shaft 27 on the side wall of the upper clamping seat 26 rotates, the driving wheel 36 is driven to synchronously rotate, then the driving wheel 36 drives the driven wheel 38 to rotate through the driving belt 37, so as to drive the rotating shaft 35 to rotate, and when the rotating shaft 35 rotates, the two sliding blocks 316 are driven to move in opposite directions to close through the external threads 317 at the two ends, and the two support plates 39 in the cross rod are driven to rotate and open in the horizontal direction, at the moment, the cross connecting rod is integrally stretched downwards, and the plurality of protection rings 32 are driven to diffuse and move downwards, so that a cylindrical protection structure is formed between the upper clamping seat 26 and the lower clamping seat 23, and the clamped detection parts are subjected to surrounding protection;
the upper clamping seat 26 is driven by the hydraulic cylinder 25 to continuously pressurize downwards, so that downward static pressure is applied to the detection component through the upper clamping seat 26, or the upper clamping seat 26 is driven by the hydraulic cylinder 25 to reciprocate, so that dynamic pressure is applied to the detection component through the upper clamping seat 26 in a reciprocating manner, and the fatigue detection sensor can receive the pressure born by the detection component through the lower clamping seat 23 so as to perform fatigue test;
when the detection of the parts is completed, the driving shaft 27 on the side wall of the upper clamping seat 26 is reversely rotated to enable the three-jaw chuck 29 to loosen the clamping of the parts, at the moment, the driving shaft 27 drives the driving wheel 36 to synchronously reversely rotate, then the driving wheel 36 drives the driven wheel 38 to reversely rotate through the driving belt 37, so that the rotating shaft 35 is driven to reversely rotate, when the rotating shaft 35 reversely rotates, the two sliding blocks 316 are driven to reversely move and open through the external threads 317 at the two ends, the two support plates 39 in the cross rod are driven to rotate and close in the horizontal direction, at the moment, the whole cross connecting rod is contracted upwards, and the plurality of protection rings 32 are driven to contract upwards and reset, so that the plurality of protection rings 32 are sequentially folded below the upper clamping seat 26;
finally, the driving shaft 27 on the side wall of the lower clamping seat 23 is rotated to drive the three-jaw chuck 29 in the lower clamping seat 23 to gradually open, so that the clamping of the bottom end of the detection part is released, and the detected part can be detected.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above disclosed preferred embodiments of the invention are merely intended to help illustrate the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention.
Claims (4)
1. The electrohydraulic servo fatigue testing machine comprises a frame (1), and is characterized in that: a detection mechanism (2) for detecting fatigue of the component is arranged on the frame (1);
the detection mechanism (2) comprises a lower clamping seat (23) and an upper clamping seat (26), the lower clamping seat (23) is fixedly arranged on a workbench surface at the upper end of the frame (1), the upper clamping seat (26) is arranged above the lower clamping seat (23) in a lifting manner, and clamping pieces are arranged in the lower clamping seat (23) and the upper clamping seat (26);
a protection mechanism (3) for enclosing and protecting the detection part is also arranged between the lower clamping seat (23) and the upper clamping seat (26);
the protection mechanism (3) comprises a transmission assembly, a lifting driving assembly and a plurality of protection rings (32), the protection rings (32) are arranged between the lower clamping seat (23) and the upper clamping seat (26) from top to bottom through the lifting driving assembly, and the lifting driving assembly is in transmission connection with the clamping piece through the transmission assembly;
when the part to be detected is clamped and fixed between the lower clamping seat (23) and the upper clamping seat (26) through the clamping piece, the lifting driving assembly drives the plurality of protection rings (32) to synchronously move downwards under the transmission of the transmission assembly, so that the plurality of protection rings (32) move and spread on the periphery of the part to be detected to form a cylindrical protection structure;
when the clamping piece is driven to loosen the clamping of the detected part, the lifting driving assembly drives the plurality of protection rings (32) to synchronously move upwards and reset under the transmission of the transmission assembly, so that the plurality of protection rings (32) gradually move and fold at the periphery of the detected part, and the detected part is not blocked and protected;
the clamping piece comprises a driving shaft (27) and three-jaw chucks (29), the two three-jaw chucks (29) are respectively arranged in the lower clamping seat (23) and the upper clamping seat (26), the two driving shafts (27) are respectively rotatably arranged on the side walls of the lower clamping seat (23) and the upper clamping seat (26) and are in transmission connection with the corresponding three-jaw chucks (29), and inner hexagonal holes (28) are formed in the end parts of the driving shafts (27);
the lifting driving assembly comprises two cross connecting rods and two telescopic driving units, the two cross connecting rods are respectively arranged at two ends of the upper clamping seat (26) through the telescopic driving units, each cross pivot of each cross connecting rod is connected with the corresponding protection ring (32), and the two corresponding cross pivot of each cross connecting rod are respectively connected with two sides of the same protection ring (32);
the cross connecting rod comprises a plurality of support plates (39), a plurality of support shafts (310) and a plurality of connecting shafts (311), wherein the support plates (39) are movably connected in a cross mode through the support shafts (310) in pairs to form a plurality of cross rods, and the cross rods are sequentially connected in a rotary mode through the connecting shafts (311);
a connecting seat (314) is fixedly arranged at the inner side end of the fulcrum shaft (310), and the inner side end of the connecting seat (314) is fixedly connected with the outer wall of the protection ring (32);
the telescopic driving unit comprises a ring seat (31), the ring seat (31) is fixedly arranged at the bottom end of the upper clamping seat (26) and positioned on the outer ring of the three-jaw chuck (29), two ends of the bottom surface of the ring seat (31) are fixedly provided with supporting seats (34), and the outer side surface of each supporting seat (34) is fixedly provided with a bearing seat (315);
the bearing seat (315) is rotatably provided with a rotating shaft (35), two groups of external threads (317) with opposite thread directions are arranged at two ends of the rotating shaft (35), two ends of the rotating shaft (35) are respectively provided with a sliding block (316) through the thread transmission of the external threads (317), the outer side surfaces of the two sliding blocks (316) are respectively and rotatably connected with two connecting shafts (311) at the uppermost ends of the crossed connecting rods, and the inner side surfaces of the two sliding blocks (316) are respectively and slidably arranged on the outer side surfaces of the supporting seats (34);
the transmission assembly comprises a driving wheel (36), a transmission belt (37) and two driven wheels (38), wherein the driving wheel (36) is fixedly installed on the driving shaft (27), the two driven wheels (38) are respectively fixedly installed on the two rotating shafts (35), and the driving wheel (36) is in transmission connection with the two driven wheels (38) through the transmission belt (37).
2. The electrohydraulic servo fatigue testing machine of claim 1, wherein: the hydraulic telescopic device is characterized in that a guide post (21) and a hydraulic telescopic shaft (22) are mounted on the frame (1), a cross beam (24) is slidably mounted at the upper end of the guide post (21), the end part of the cross beam (24) is fixedly connected with the telescopic end of the top of the hydraulic telescopic shaft (22), a hydraulic cylinder (25) is fixedly mounted in the middle of the cross beam (24), and an upper clamping seat (26) is fixedly mounted at the telescopic end of the bottom of the hydraulic cylinder (25).
3. The electrohydraulic servo fatigue testing machine of claim 1, wherein: the top of lower holder (23) is fixed mounting has spacing ring (312), the internal diameter of spacing ring (312) is not less than the external diameter of protection ring (32), spacing spout (313) that correspond with connecting seat (314) are provided with at the both ends of spacing ring (312).
4. An electrohydraulic servo fatigue testing machine according to any of claims 1-3, wherein: and multistage telescopic shafts (33) which are distributed at equal intervals along the circumferential direction are fixedly arranged between the adjacent protection rings (32).
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| CN202310907957.3A CN116625855B (en) | 2023-07-24 | 2023-07-24 | Electrohydraulic servo fatigue testing machine |
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| CN202310907957.3A CN116625855B (en) | 2023-07-24 | 2023-07-24 | Electrohydraulic servo fatigue testing machine |
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