CN112903481B - Pendulum testing machine - Google Patents
Pendulum testing machine Download PDFInfo
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- CN112903481B CN112903481B CN202110070203.8A CN202110070203A CN112903481B CN 112903481 B CN112903481 B CN 112903481B CN 202110070203 A CN202110070203 A CN 202110070203A CN 112903481 B CN112903481 B CN 112903481B
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- pendulum
- frame
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- clamping
- lower annular
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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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
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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
- G01N3/02—Details
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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
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
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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
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0039—Hammer or pendulum
Abstract
The invention discloses a pendulum bob testing machine which comprises a base, a test piece fixing device, a lifting driving device, an upper rotating frame, a pendulum bob and an electric control unit, wherein the test piece fixing device comprises a fixing frame, a lifting frame and a clamping assembly, and the fixing frame is arranged on the base. The crane activity sets up the one side at the mount, and the centre gripping subassembly has two, sets up respectively on the base and on the crane. The lifting driving device comprises a lower annular support and a plurality of steel columns, the steel columns are uniformly arranged outside the base in an annular mode, and the outer side of the lower annular support is in sliding fit with the steel columns. The upper rotating frame is positioned above the lifting driving device, the bottom of the upper rotating frame is in running fit with the lower annular support, one end of the pendulum bob is hinged with the upper rotating frame, and the upper rotating frame is provided with a touch self-locking device and a pendulum bob release coupling assembly. The automatic test device has high automation degree, meets the test requirements of regular test pieces and special-shaped test pieces, automatically adjusts the impact height and angle, has high efficiency and simple and flexible operation, and effectively avoids secondary impact of the hammer head on the test piece.
Description
Technical Field
The invention relates to the technical field of building test equipment, in particular to a pendulum testing machine.
Background
As a commonly used engineering structure, a reinforced concrete structure may be subjected to various impact loads during use, such as collision, explosion, water impact, terrorist attack, and the like. In order to facilitate civil engineering professionals to carry out scale tests on building structures or members based on artificial and natural dynamic load factors, the test equipment is specially designed, and the test equipment with the combined function can be provided for teams with different test requirements. At present, no relevant test equipment exists at home and abroad. Therefore, the prior art is in need of further improvement.
At present, there have been the dynamic response research of regular structural component under the impact load effect of a large amount of domestic and foreign expert scholars to roof beam, post, board, because current test equipment's limitation, present test instrument is mainly gravity type drop hammer, and the test object is mostly regular, but transverse arrangement's roof beam, post, board etc., can't satisfy the experimental requirement of special-shaped test piece, in addition, current gravity type drop hammer simple structure, the operation degree of difficulty is big, inefficiency, experimental test piece easily receives the secondary striking, lead to the not high problem of test data degree of accuracy. In order to more intuitively simulate the influence of different hammer weights, impact speeds and impact energy on the structural response of different test pieces under the real working condition, the test pieces not only are regular beam, column and plate test pieces, but also can be special-shaped test pieces or structural systems, and the existing test equipment needs to be further improved and enhanced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a pendulum bob testing machine, which solves the problems that the existing gravity type drop hammer is simple in structure, high in operation difficulty, low in efficiency, incapable of meeting the test requirements of irregular test pieces and capable of solving the problem that the test pieces are subjected to secondary impact.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a pendulum testing machine, its includes base, test piece fixing device, lift drive, goes up revolving rack, pendulum and electrical unit, and test piece fixing device sets up in the top of base, and it includes mount, crane, centre gripping subassembly, and the mount is installed on the base.
The crane is movably arranged on one side of the fixing frame and located above the base, the two clamping assemblies are oppositely arranged one above the other, one of the clamping assemblies is movably arranged above the base, and the other clamping assembly is movably arranged on the crane.
The lifting driving device comprises a lower annular support and a plurality of steel columns, the steel columns are uniformly arranged outside the base in an annular mode, and the outer side of the lower annular support is in sliding fit with the steel columns.
The upper revolving frame is located above the lifting driving device, the bottom of the upper revolving frame is in running fit with the lower annular support, and the pendulum bob is arranged on the upper revolving frame.
One end of the pendulum bob is hinged with the top of the upper rotating frame, a touch self-locking device for preventing the pendulum bob from impacting the test block secondarily is arranged on the upper rotating frame, and a pendulum bob releasing coupling assembly is arranged on the upper rotating frame.
Furthermore, two first guide columns are vertically and oppositely arranged on the inner side of the fixing frame, and the first guide columns penetrate through the lifting frame and are in vertical sliding fit with the lifting frame.
A first lead screw is vertically arranged between the two first guide pillars and is arranged in parallel relative to the first guide pillars, and the first lead screw penetrates through the lifting frame to be in threaded fit with the lifting frame.
The fixing frame is provided with a first servo motor, one end of the first lead screw is connected with the output end of the first servo motor, and the signal end of the first servo motor is in communication connection with the electronic control unit.
Furthermore, the clamping assembly comprises two second guide columns, two bidirectional lead screws and two clamping blocks, the two second guide columns are horizontally arranged oppositely, and the bidirectional lead screws are horizontally arranged between the two second guide columns.
One end of the bidirectional screw rod is provided with a second servo motor, and a signal end of the second servo motor is in communication connection with the electric control unit.
The two clamping blocks are oppositely arranged along the axial direction of the second guide pillar, the second guide pillar and the bidirectional screw rod both penetrate through the two clamping blocks, and the clamping blocks are in sliding fit with the second guide pillar.
The two clamping blocks are respectively in running fit with two sections of reverse threads of the bidirectional screw rod, and the screw rod drives the two clamping blocks to synchronously approach or depart from the two clamping blocks along the second guide pillar.
The clamping block comprises a clamping block main body and clamping jaws, the clamping block main body is of a rectangular structure with a square cross section, and the clamping jaws are located on one side, deviating from each other, of the two clamping block main bodies and are of an integrated structure with the corresponding clamping block main bodies.
Furthermore, the bottoms of the two clamping blocks of the clamping assembly positioned below are in sliding fit with the first guide rail arranged on the base, and the tops of the two clamping blocks of the clamping assembly positioned below are in sliding fit with the second guide rail arranged on the lifting frame.
Furthermore, the steel columns are channel steel, and the open sides of the channel steel face the center of the area surrounded by all the steel columns.
The inside of each channel-section steel all disposes a slider, and the below of each slider all is provided with a first pneumatic cylinder, and the tailpiece of the piston rod portion of each first pneumatic cylinder links to each other rather than the slider of top is fixed, each the slider all links to each other with the lateral wall stationary phase of lower annular support is integrative, and all first pneumatic cylinders stretch out and draw back in step, and the drive is lower annular support and is gone up and down.
Furthermore, the bottom of the upper rotating frame is in running fit with the top of the lower annular support through a slewing bearing, the slewing bearing comprises an inner ring, an outer ring, a worm and a hydraulic motor, the inner ring is fixedly installed on the lower annular support, and the outer ring is fixedly connected with the bottom of the upper rotating frame.
The outer side wall of the outer ring is provided with gear teeth matched with the worm, the hydraulic motor is fixedly installed on one side of the lower annular support, one end of the worm is fixedly connected with the output end of the hydraulic motor in a coaxial mode, the worm drives the upper revolving frame to rotate through the outer ring, and the signal end of the hydraulic motor is in communication connection with the electric control unit.
Furthermore, the upper rotating frame comprises an upper annular seat, a cross beam and a supporting arm, wherein the cross beam is horizontally arranged on the inner side of the upper annular seat, and two ends of the cross beam are fixedly connected with the upper annular seat respectively.
The support arm is located the top of crossbeam and intersects with the crossbeam cross, and the bottom of support arm links into an organic whole structure through the riser of relative interval arrangement and the middle part stationary phase of crossbeam, and the support arm tip is articulated with the one end of pendulum, and the tup of pendulum is installed at its other end.
Furthermore, touch-control self-lock device includes guide bracket, thrust plate and second pneumatic cylinder, and guide bracket is located between two risers, and it includes two guide arms that relative level arranged, and the one end that two guide arms are close to the pendulum is fixed continuous through the pivot, and the other end passes through the square shaft and links to each other.
The two guide rods are respectively in sliding fit with the vertical plates on the same side through a guide sleeve, a spring is sleeved on each guide rod and is positioned on one side, close to the pendulum, of the guide sleeve, and the back face of the thrust plate is rotatably connected with the rotating shaft through a hinged support.
The second hydraulic cylinder is arranged on one side, deviating from the pendulum, of the cross beam through the mounting frame, the end portion of a piston rod of the second hydraulic cylinder is provided with an electromagnet, and a signal end of the electromagnet is in communication connection with the electric control unit.
One side of the vertical plate close to the pendulum is provided with a photoelectric delay switch, and the signal end of the photoelectric delay switch is in communication connection with the electric control unit.
Furthermore, pendulum release coupling subassembly includes two coupling pieces, and two coupling pieces symmetry are established in the inboard of revolving rack and are corresponded with the position of the pendulum other end, and two spacing seats are installed to the bilateral symmetry of the pendulum other end, and two coupling pieces cooperate with two spacing seats respectively.
One end of the coupling piece, which is close to the upper revolving frame, is rotatably connected with the upper revolving frame, one side, which deviates from each other, of the two coupling pieces is respectively provided with a third hydraulic cylinder, the signal end of the third hydraulic cylinder is in communication connection with the electric control unit, and the two third hydraulic cylinders synchronously stretch and drive the two coupling pieces to be close to or far away from each other.
Furthermore, one side of the other end of the pendulum bob, which is close to the test piece fixing device, is provided with a hammer head mounting seat, the hammer head of the pendulum bob is detachably and fixedly mounted on the hammer head mounting seat, and the shape of the hammer head is spherical, cylindrical or wedge-shaped.
By adopting the technical scheme, the invention has the beneficial technical effects that: the pendulum bob testing machine disclosed by the invention has the advantages that the automation degree is high, the testing requirements of a regular test piece and a special-shaped test piece are met, the impact height and angle are automatically adjusted, the time and the labor are saved, the efficiency is high, the operation is simple, convenient and flexible, the secondary impact of a hammer head on a test block is effectively avoided, and the obtained testing result is more accurate.
Drawings
Fig. 1 is a schematic structural principle diagram of a pendulum testing machine of the present invention.
Fig. 2 is a schematic structural diagram of a portion of the present invention shown in fig. 1, and illustrates a touch-controlled self-locking device and related components.
FIG. 3 isbase:Sub>A cross-sectional view of the invention A-A of FIG. 1.
FIG. 4 is a schematic top view of another portion of the present invention of FIG. 1 showing a specimen holder.
Fig. 5 is a left side view schematically showing the structure of the specimen holder shown in fig. 4.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
combine fig. 1 to 5, a pendulum testing machine, it includes test piece fixing device 1, base 2, lift drive 3, goes up revolving rack 4, pendulum 5 and electrical unit, and test piece fixing device 1 sets up in the top of base 2, and it includes mount 11, crane 12, centre gripping subassembly, and mount 11 installs in base 2 top, and its lower extreme links to each other with the last fixed surface of base 2. The electric control unit comprises an electric control cabinet and a PLC (programmable logic controller), the PLC adopts the existing PLC in the prior art, receives an electric signal sent by a signal acquisition component, sends an instruction for an electric execution component to control the work of the electric execution component, and the electric control cabinet is connected with 220V mains supply to supply power for each electric component of the pendulum testing machine.
Two first guide pillars 10 are vertically and oppositely arranged on the inner side of the fixed frame 11, the two first guide pillars 10 are arranged in parallel, the upper ends of the first guide pillars are fixedly connected with the top of the fixed frame 11, and the lower ends of the first guide pillars are fixedly connected with the base 2. The lifting frame 12 is movably arranged at the front side of the fixed frame 11, the lifting frame 12 is of a steel plane frame structure, and is horizontally arranged above the base 2. The rear end of the lifting frame 12 is positioned in the fixed frame 11, the first guide post 10 penetrates through the rear end of the lifting frame 12, and the lifting frame 12 is in vertical sliding fit with the first guide post.
A first lead screw 13 is vertically arranged between the two first guide columns, the first lead screw 13 and the first guide columns 10 are arranged in parallel relatively, and the first lead screw 13 penetrates through the lifting frame 12 to be in threaded fit with a nut fixedly arranged on the lifting frame 12. A first servo motor 14 is fixedly installed at the top of the fixing frame 11, the upper end of a first lead screw 13 is fixedly connected with the same shaft, and the signal end of the first servo motor 14 is in communication connection with an electric control unit.
Under the working state, the output end of the first servo motor 14 drives the first lead screw 13 to rotate, the first lead screw 13 drives the lifting frame 12 to move up and down along the axial direction of the two first guide posts, and the height of the lifting frame 12 is adjusted.
The clamping components are arranged oppositely one above the other, one of the clamping components is movably arranged above the base 2, the other clamping component is movably arranged on the lifting frame 12, and the clamping components on the lifting frame 12 lift along with the lifting frame 12.
The clamping assembly comprises two second guide columns 15, two bidirectional lead screws 16 and two clamping blocks 17, the two second guide columns 15 are horizontally and longitudinally arranged oppositely, the bidirectional lead screws 16 are horizontally arranged between the two second guide columns 15, and the bidirectional lead screws 16 are parallel to the second guide columns 15. The two clamping blocks 17 are oppositely arranged along the axial direction of the second guide post 15, the second guide post 15 and the bidirectional screw 16 both penetrate through the two clamping blocks 17, and the clamping blocks 17 are in sliding fit with the second guide post 15.
The clamping block 17 comprises a clamping block main body and clamping jaws, the clamping block main body is of a rectangular structure with a square cross section, and the clamping jaws are located on one side of the two clamping block main bodies, which deviate from each other, and are of an integrated structure with the corresponding clamping block main bodies.
The bottom parts of the two clamping blocks 17 of the lower clamping assembly are in sliding fit with a first guide rail 18 fixedly arranged on the upper surface of the base 2, the top parts of the two clamping blocks 17 of the lower clamping assembly are in sliding fit with a second guide rail 19 fixedly arranged at the bottom part of the lifting frame 12, the length directions of the first guide rail 18 and the second guide rail 19 are consistent with the axial direction of the second guide post 15, and the first guide rail 18 and the second guide rail 19 both have guiding and restraining effects on the movement of the clamping blocks 17 to ensure the front and back linear movement of the clamping blocks.
The rear end of the bidirectional screw 16 is provided with a second servo motor, the output end of the second servo motor is coaxially and fixedly connected with the rear end of the bidirectional screw 16, the signal end of the second servo motor is in communication connection with the electronic control unit, and the second servo motor drives the bidirectional screw 16 to rotate. The two clamping blocks 17 are respectively in rotating fit with two sections of reverse threads of the bidirectional screw 16, and the screw drives the two clamping blocks 17 to synchronously approach or depart from along the second guide post 15.
During operation, the distance between the two clamping blocks 17 arranged on the base 2 is adjusted through the bidirectional screw 16 of the clamping component positioned below, and then the test block is hoisted and placed on the two clamping blocks 17 positioned on the base 2 to clamp the bottom of the test block. The two clamping blocks 17 positioned on the lifting frame 12 are kept in an open state, the first lead screw 13 drives the lifting frame 12 to fall to the top of the test block, the two clamping blocks 17 positioned on the lifting frame 12 clamp the top of the test block, and the test block is fixed on the test piece fixing device 1.
The lifting driving device 3 comprises a lower annular support 31 and six steel columns 32, the six steel columns 32 are uniformly arranged on the outer side of the base 2 in an annular mode, and the outer side of the lower annular support 31 is in sliding fit with each steel column 32. The steel columns 32 are channel steel, and the open sides of the channel steel face the center of the area formed by the surrounding of all the steel columns 32. The inside of each channel-section steel all disposes a slider 33, and the below of each slider 33 all is provided with a first pneumatic cylinder, and the tailpiece of the piston rod portion of each first pneumatic cylinder links to each other with the slider 33 of its top is fixed, each slider 33 all links to each other with the lateral wall stationary phase of lower annular support 31 is integrative, and all first pneumatic cylinders stretch out and draw back in step, and drive lower annular support 31 goes up and down, a pendulum testing machine still includes the hydraulic pressure station, the oil feed return oil is for first pneumatic cylinder in the hydraulic pressure station.
The upper revolving frame 4 is positioned above the lifting driving device 3, the bottom of the upper revolving frame 4 is in running fit with the lower annular support 31, and the pendulum bob 5 is arranged on the upper revolving frame 4. The other end of the pendulum bob 5 close to the side of the test piece fixing device 1 is provided with a hammer head 51 mounting seat, the hammer head 51 of the pendulum bob 5 is detachably and fixedly mounted on the hammer head 51 mounting seat, the shape of the hammer head 51 is spherical, cylindrical or wedge-shaped, and the spherical hammer head 51 is preferably adopted in the invention. During operation, the first hydraulic cylinder drives the lower annular support 31 to lift, the height of the upper rotating frame 4 is adjusted, and then the height of the impact position of the pendulum bob 5 on the test block is adjusted.
Specifically, the bottom of the upper revolving frame 4 is rotatably matched with the top of the lower annular support 31 through a revolving support, the upper revolving frame 4 comprises an upper annular seat 41, a cross beam 42 and a support arm 43, the cross beam 42 is horizontally arranged on the inner side of the upper annular seat 41, and two ends of the cross beam are respectively fixedly connected with the upper annular seat 41. The supporting arm 43 is located above the cross beam 42 and crosses the cross beam 42, and the bottom of the supporting arm 43 is fixedly connected with the middle part of the cross beam 42 through vertical plates 44 arranged at intervals relatively to form an integral structure.
The slewing bearing comprises an inner ring 61, an outer ring 62, a worm 63 and a hydraulic motor 64, wherein the inner ring 61 is fixedly arranged on the lower annular support 31, and the outer ring 62 is fixedly connected with the bottom of the upper slewing frame 4. The outer side wall of the outer ring 62 is provided with gear teeth matched with the worm 63, the hydraulic motor 64 is fixedly installed on one side of the lower annular support 31, one end of the worm 63 is coaxially and fixedly connected with the output end of the hydraulic motor 64, the worm 63 drives the upper rotating frame 4 to rotate through the outer ring 62, the signal end of the hydraulic motor 64 is in communication connection with the electric control unit, and the electric control unit controls and adjusts the rotating angle of the upper rotating frame 4 relative to the lower annular support 31 through the hydraulic motor 64 so as to adjust the impact angle of the pendulum bob 5 on the test block.
One end of the pendulum bob 5 is hinged with the top of the upper rotating frame 4, a touch self-locking device 7 for preventing the pendulum bob 5 from impacting a test block for the second time is arranged on the upper rotating frame 4, and a pendulum bob release coupling assembly 8 is arranged on the upper rotating frame 4. The end of the support arm 43 is hinged to one end of the pendulum 5, and the hammer head 51 of the pendulum 5 is mounted to the other end thereof.
Touch self-lock device 7 includes guide bracket 71, thrust plate 72 and second pneumatic cylinder 73, and guide bracket 71 is located between two risers 44, and it includes two guide arms that relative level arranged, and the one end that two guide arms are close to pendulum 5 is fixed continuous through the pivot, and the other end is fixed continuous through the square shaft. The two guide rods are respectively in sliding fit with the vertical plate 44 on the same side through a guide sleeve 75, a spring 74 is sleeved on each guide rod, the spring 74 is positioned on one side, close to the pendulum bob 5, of the guide sleeve 75, and the back of the thrust plate 72 is rotatably connected with the rotating shaft through a hinged support.
The second hydraulic cylinder 73 is arranged on one side of the cross beam 42 departing from the pendulum 5 through a mounting frame, an electromagnet is installed at the end part of a piston rod of the second hydraulic cylinder 73, and a signal end of the electromagnet is in communication connection with an electronic control unit. A photoelectric delay switch 76 is arranged on one side of the vertical plate 44 close to the pendulum bob 5, and a signal end of the photoelectric delay switch 76 is in communication connection with an electronic control unit.
When the pendulum 5 is released, the electromagnet attracts the rear end of the guide holder 71 and pulls it backward, and before the hammer 51 of the pendulum 5 strikes the test block, the thrust plate 72 is not in contact with the pendulum 5, and the spring 74 is always in a compressed state. At the moment when the hammer 51 impacts the test block, the photoelectric delay switch 76 receives the signal and sends the signal to the LPC controller, the LPC controller sends an instruction to the electromagnet, and the electromagnet releases the guide support 71. When the hammer 51 impacts the test block to rebound, the thrust plate 72 is contacted with the rear side of the pendulum bob 5, so that the pendulum bob 5 is prevented from impacting the test block for the second time, and the test result is prevented from being influenced.
The pendulum releasing coupling assembly 8 comprises two coupling pieces 81, the two coupling pieces 81 are symmetrically arranged on the inner side of the revolving frame and correspond to the other end of the pendulum 5, two limiting seats 52 are symmetrically arranged on two sides of the other end of the pendulum 5, and the two coupling pieces 81 are respectively matched with the two limiting seats 52. One end of the coupling piece 81 close to the upper revolving frame 4 is rotatably connected with the upper revolving frame, one side of the two coupling pieces 81 which are deviated from each other is respectively provided with a third hydraulic cylinder 82, the signal end of the third hydraulic cylinder 82 is in communication connection with the electric control unit, and the third hydraulic cylinder 82 synchronously stretches and retracts to drive the two coupling pieces 81 to be close to or far away from each other.
The other end of the pendulum bob 5 is tied with a steel wire rope, the hoisting equipment pulls the pendulum bob 5 upwards through the steel wire rope, the two coupling pieces 81 are opened, after the two limiting seats 52 of the pendulum bob 5 pass through the two coupling pieces 81, the coupling pieces 81 are closed, and the coupling pieces 81 support the pendulum bob 5 through the limiting seats 52. When pendulum 5 is released, coupling 81 opens.
Parts which are not described in the invention can be realized by adopting or referring to the prior art.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used merely for convenience in describing the present invention and to simplify the description, but do not indicate or imply that the device or element in question must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (8)
1. A pendulum bob testing machine comprises a base, a test piece fixing device, a lifting driving device, an upper revolving frame, a pendulum bob and an electric control unit, and is characterized in that the test piece fixing device is arranged above the base and comprises a fixing frame, a lifting frame and a clamping assembly, and the fixing frame is arranged on the base;
the lifting frame is movably arranged on one side of the fixed frame and positioned above the base, two clamping assemblies are oppositely arranged one above the other, one of the clamping assemblies is movably arranged above the base, and the other clamping assembly is movably arranged on the lifting frame;
the lifting driving device comprises a lower annular support and a plurality of steel columns, the plurality of steel columns are uniformly arranged on the outer side of the base in an annular mode, and the outer side of the lower annular support is in sliding fit with each steel column;
the upper revolving frame is positioned above the lifting driving device, the bottom of the upper revolving frame is in running fit with the lower annular support, and the pendulum bob is arranged on the upper revolving frame;
one end of the pendulum bob is hinged with the top of the upper revolving frame, a touch self-locking device for preventing the pendulum bob from impacting the test block secondarily is arranged on the upper revolving frame, and a pendulum bob release coupling assembly is arranged on the upper revolving frame;
the steel columns are made of channel steel, and the open sides of the channel steel face the center of an area defined by all the steel columns;
a sliding block is arranged in each channel steel, a first hydraulic cylinder is arranged below each sliding block, the end part of a piston rod of each first hydraulic cylinder is fixedly connected with the sliding block above the first hydraulic cylinder, each sliding block is fixedly connected with the outer side wall of the lower annular support into a whole, and all the first hydraulic cylinders synchronously stretch and contract to drive the lower annular support to lift;
the bottom of the upper revolving frame is in running fit with the top of the lower annular support through a revolving support, the revolving support comprises an inner ring, an outer ring, a worm and a hydraulic motor, the inner ring is fixedly arranged on the lower annular support, and the outer ring is fixedly connected with the bottom of the upper revolving frame;
the outer side wall of the outer ring is provided with gear teeth matched with the worm, the hydraulic motor is fixedly installed on one side of the lower annular support, one end of the worm is fixedly connected with the output end of the hydraulic motor in a coaxial mode, the worm drives the upper revolving frame to rotate through the outer ring, and the signal end of the hydraulic motor is in communication connection with the electric control unit.
2. The pendulum testing machine according to claim 1, wherein two first guide posts are arranged vertically opposite inside the fixing frame, and the first guide posts pass through the lifting frame and are in vertical sliding fit with the lifting frame;
a first lead screw is vertically arranged between the two first guide posts, the first lead screw and the first guide posts are arranged in parallel relatively, and the first lead screw penetrates through the lifting frame to be in threaded fit with the lifting frame;
the fixing frame is provided with a first servo motor, one end of the first lead screw is connected with the output end of the first servo motor, and the signal end of the first servo motor is in communication connection with the electronic control unit.
3. The pendulum testing machine according to claim 1 or 2, wherein the clamping assembly comprises two second guide posts, two bidirectional lead screws and two clamping blocks, the two second guide posts are arranged horizontally and oppositely, and the bidirectional lead screws are arranged horizontally between the two second guide posts;
one end of the bidirectional screw rod is provided with a second servo motor, and the signal end of the second servo motor is in communication connection with the electric control unit;
the two clamping blocks are oppositely arranged along the axial direction of the second guide pillar, the second guide pillar and the bidirectional screw rod both penetrate through the two clamping blocks, and the clamping blocks are in sliding fit with the second guide pillar;
the two clamping blocks are respectively in rotating fit with two sections of reverse threads of the bidirectional screw rod, and the screw rod drives the two clamping blocks to synchronously approach or depart from the two clamping blocks along the second guide pillar;
the clamping block comprises a clamping block main body and clamping jaws, the clamping block main body is of a rectangular structure with a square cross section, and the clamping jaws are located on one side, deviating from each other, of the two clamping block main bodies and are of an integrated structure with the corresponding clamping block main bodies.
4. A pendulum testing machine according to claim 3, characterized in that the bottom of the two clamping blocks of the lower clamping assembly are in sliding fit with the first guide rail provided on the base, and the top of the two clamping blocks of the lower clamping assembly are in sliding fit with the second guide rail provided on the crane.
5. The pendulum testing machine according to claim 1, wherein the upper turret comprises an upper annular seat, a cross member and a support arm, the cross member is horizontally arranged inside the upper annular seat, and two ends of the cross member are fixedly connected with the upper annular seat respectively;
the support arm is located the top of crossbeam and intersects with the crossbeam cross, and the bottom of support arm links into an organic whole structure through the riser of relative interval arrangement and the middle part stationary phase of crossbeam, and the support arm tip is articulated with the one end of pendulum, and the tup of pendulum is installed at its other end.
6. The pendulum testing machine according to claim 5, wherein the touch self-locking device comprises a guide bracket, a thrust plate and a second hydraulic cylinder, the guide bracket is positioned between the two vertical plates and comprises two guide rods which are relatively and horizontally arranged, one ends of the two guide rods, which are close to the pendulum, are fixedly connected through a rotating shaft, and the other ends of the two guide rods are fixedly connected through a square shaft;
the two guide rods are respectively in sliding fit with the vertical plates on the same side through a guide sleeve, springs are sleeved on the guide rods and located on one side, close to the pendulum bob, of the guide sleeve, and the back of the thrust plate is rotatably connected with the rotating shaft through a hinged support;
the second hydraulic cylinder is arranged on one side of the cross beam, which is far away from the pendulum bob, through the mounting frame, the end part of a piston rod of the second hydraulic cylinder is provided with an electromagnet, and the signal end of the electromagnet is in communication connection with the electronic control unit;
one side of the vertical plate close to the pendulum is provided with a photoelectric delay switch, and the signal end of the photoelectric delay switch is in communication connection with the electric control unit.
7. The pendulum testing machine according to claim 1, wherein the pendulum release coupling assembly comprises two coupling members, the two coupling members are symmetrically arranged on the inner side of the revolving frame and correspond to the other end of the pendulum, two limiting seats are symmetrically arranged on two sides of the other end of the pendulum, and the two coupling members are respectively matched with the two limiting seats;
one end of the coupling piece, which is close to the upper revolving frame, is rotatably connected with the upper revolving frame, one side, which deviates from each other, of the two coupling pieces is respectively provided with a third hydraulic cylinder, the signal end of the third hydraulic cylinder is in communication connection with the electric control unit, and the two third hydraulic cylinders synchronously stretch and drive the two coupling pieces to be close to or far away from each other.
8. The pendulum testing machine according to claim 1, wherein the pendulum has a hammer head mounting seat on the side of the other end of the pendulum near the specimen fixing device, the hammer head of the pendulum is detachably and fixedly mounted on the hammer head mounting seat, and the shape of the hammer head is spherical, cylindrical or wedge-shaped.
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| CN202869771U (en) * | 2012-10-16 | 2013-04-10 | 中国汽车工程研究院股份有限公司 | Commercial vehicle multifunctional pendulum bob hitting test bed |
| ES2473666B1 (en) * | 2013-12-23 | 2015-04-13 | Fundación Centro Tecnologias Aeronauticas | PENDULUM DEVICE FOR LOW ENERGY IMPACT TEST |
| CN103969135A (en) * | 2014-04-14 | 2014-08-06 | 武汉科技大学 | Pendulum bob impact experiment platform for mechanical property testing of metal material surface |
| CN206832428U (en) * | 2017-06-30 | 2018-01-02 | 苏州德源机电有限公司 | Electronic clamping and relieving mechanism for pendulum test machine |
| CN107817119B (en) * | 2017-12-06 | 2024-02-02 | 山东凯帝斯工业系统有限公司 | Comprehensive impact test bed for automobile steering component and detection method thereof |
| CN109297664A (en) * | 2018-11-01 | 2019-02-01 | 杭州应敏科技有限公司 | Full-automatic mechanical collision tester |
| CN109799054A (en) * | 2019-01-02 | 2019-05-24 | 浙江大学 | Ship collision centrifuge modelling device and method |
| JP7280117B2 (en) * | 2019-05-31 | 2023-05-23 | 日鉄神鋼建材株式会社 | Izod impact test method |
| CN210196652U (en) * | 2019-06-20 | 2020-03-27 | 苏秀安 | Heating and ventilation pipeline fixed mounting structure |
| CN211235242U (en) * | 2019-11-25 | 2020-08-11 | 洛阳黎明检测服务有限公司 | Clamping device of universal testing machine |
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Inventor after: Zhang Yuteng Inventor after: Shang Hongkun Inventor after: Yan Qingfeng Inventor after: Shi Chenglong Inventor after: Liu Daichun Inventor after: Chen Zengguang Inventor after: Zhang Jigang Inventor after: Yang Yingchun Inventor after: Jiang Yunlei Inventor after: Liu Feifei Inventor after: Wang Xiangying Inventor after: Liang Haizhi Inventor after: Shao Feng Inventor after: Chen Yongqing Inventor before: Zhang Jigang Inventor before: Shang Hongkun Inventor before: Yan Qingfeng Inventor before: Shi Chenglong Inventor before: Liu Daichun Inventor before: Chen Zengguang Inventor before: Zhang Yuteng Inventor before: Yang Yingchun Inventor before: Jiang Yunlei Inventor before: Liu Feifei Inventor before: Wang Xiangying Inventor before: Liang Haizhi Inventor before: Shao Feng Inventor before: Chen Yongqing |
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