CN112179757A - Fatigue loading system - Google Patents
Fatigue loading system Download PDFInfo
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- CN112179757A CN112179757A CN202011262024.6A CN202011262024A CN112179757A CN 112179757 A CN112179757 A CN 112179757A CN 202011262024 A CN202011262024 A CN 202011262024A CN 112179757 A CN112179757 A CN 112179757A
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- 239000003921 oil Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
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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
- 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
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
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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
- G01N2203/0005—Repeated or cyclic
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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
- G01N2203/005—Electromagnetic means
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- G—PHYSICS
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- 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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- 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
- G01N2203/02—Details not specific for a particular testing method
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Abstract
An electrodynamic fatigue loading system comprising: the device comprises a loading frame, an electric cylinder, a beam lifting mechanism and a beam locking mechanism; the upper cross beam of the loading frame can move up and down in a stepless regulation way through the cross beam lifting mechanism; the beam lifting mechanism is driven by a stepping motor, and is lifted in a worm wheel, worm and lifting screw rod combined mode; the electric cylinder is driven by a servo motor and carries out fatigue loading in an electric servo closed-loop control mode; the beam locking mechanism is of a mechanical structure, and an elastic tensioning pull rod generated by compression of the disc spring group is used for locking the upper beam. The device has the characteristics of high response speed, high loading precision, no noise and the like, can perform load and displacement control tests, and is stable and reliable in work. Regular waveform and arbitrary waveform tests can be applied to the test piece, the load and displacement states can be switched arbitrarily, and the test piece is safe and reliable.
Description
Technical Field
The invention relates to the technical field of mechanical tests, in particular to an electromotive force fatigue loading system.
Background
In the development of the prior art, in many fields such as building, machinery, railway, aerospace and the like, fatigue characteristics of materials and products need to be detected when the materials and the products are shipped, for example, when a mobile phone is shipped, fatigue click tests need to be performed on keys and screens, whether damage occurs or not is checked after certain times of fatigue click tests are performed, and thus a fatigue loading system is needed to test the materials and the products.
The most approximate technology at present is an electro-hydraulic servo technology, fatigue loading is carried out by adopting a hydraulic oil cylinder, a power source needs to be provided with a hydraulic oil source, the oil cylinder is installed on an upper cross beam, the lifting of the upper cross beam needs to be controlled by extending out and retracting another group of oil cylinders, when the upper cross beam stays at a test position, the hydraulic oil cylinder needs to be used for locking the cross beam and an upright post, and the cross beam is guaranteed to be fixed and immovable.
The hydraulic oil cylinder carries out power fatigue loading, has large volume, heavy mass and difficult installation and has the risk of oil leakage; when the oil source works, the noise is high, the number of pipelines is large, the occupied space is large, the cost is high, and the risk of breakage is easy to occur; when the locking is carried out, the oil pump needs to be opened all the time; most hydraulic cylinders are large-tonnage and large-force equipment, and the range of small force values is short.
Disclosure of Invention
In order to overcome the prior technical problem, the invention provides an electromotive fatigue loading system which is suitable for fatigue tests needing dynamic tests in various industries.
The system adopts an electric servo closed-loop control principle, namely, the control and management are carried out through feedback after the signals are sent out; the servo actuator adopts the servo motor to drive the ball screw to load, has the characteristics of high response speed, high loading precision, no noise and the like, can perform load and displacement control tests, and is stable and reliable in work. Regular waveform and arbitrary waveform tests can be applied to the test piece, the load and displacement states can be switched arbitrarily, and the test piece is safe and reliable.
In order to achieve the purpose, the invention adopts the following specific technical scheme:
a fatigue loading system, comprising: the test device comprises a loading frame for limiting a test space and an electric cylinder fixed on the loading frame and used for carrying out fatigue loading, wherein the electric cylinder is driven by a servo motor to carry out fatigue loading in an electric servo closed-loop control mode, and the output end of the electric cylinder is abutted to a test sample and driven by the servo motor to do linear reciprocating motion.
Preferably, the device also comprises a beam lifting mechanism and a beam locking mechanism which are used for adjusting the test space; the distance between the upper cross beam and the lower cross beam of the loading frame is subjected to stepless regulation through a cross beam lifting mechanism; the beam locking mechanism is of a mechanical structure, and an elastic tensioning pull rod generated by compression of the disc spring group is used for locking the upper beam.
Preferably, the loading frame comprises: the supporting device comprises an upper cross beam, a lower cross beam and a supporting upright post for connecting the upper cross beam and the lower cross beam, wherein the upper cross beam and the lower cross beam are arranged in parallel, and the supporting upright post is perpendicular to the upper cross beam and the lower cross beam; the quantity of support post is 2 at least and parallel to each other.
Preferably, the lower cross beam is provided with an expansion sleeve, and the bottom end of the support upright post is fixedly connected with the lower cross beam through the expansion sleeve; the upper cross beam is provided with a through hole, the supporting upright column vertically penetrates through the through hole, and the through hole is matched with the outer diameter of the supporting upright column.
Preferably, the drag chain is fixed at the rear part of the upper cross beam through a screw, the lower end of the drag chain is connected with the lower cross beam through a screw, and when the upper cross beam moves up and down, the drag chain moves up and down along with the upper cross beam.
Preferably, the electric cylinder for fatigue loading includes: the device comprises a servo motor, a speed reducer, a ball screw, a cylinder barrel, an electric cylinder piston and a load sensor; the electric cylinder is fixedly connected with the upper cross beam through the cylinder barrel; the servo motor is fixedly connected with the speed reducer, the speed reducer is movably connected with the ball screw through the ball screw nut, the other end of the ball screw is connected with the electric cylinder piston, and the end part of the electric cylinder piston is provided with the load sensor.
Preferably, the beam elevating mechanism includes: the lifting screw rod is vertical to and penetrates through the upper cross beam, and the lifting screw nut is matched with the lifting screw rod; the lifting screw is fixedly connected with the upper cross beam, and the stepping motor drives the lifting screw to rotate and move up and down along the lifting screw rod.
Preferably, the beam lifting mechanism further comprises a coupler, a bearing, a worm wheel and a worm, wherein the stepping motor is connected with the coupler, the coupler is connected with the worm through the bearing, the worm drives the worm wheel to rotate, and the worm wheel is fixedly connected with the lifting nut to drive the lifting nut to rotate.
Preferably, the beam locking mechanism for locking the upper beam is further included, and the beam locking mechanism comprises: the device comprises a pull rod, a pull rod nut, a disc spring group, a gasket, a locking cylinder piston and a locking cylinder; the pull rod is connected with the pull rod nut through threads, the disc spring group is arranged between the pull rod and the pull rod nut, gaskets are arranged in front and at back of the disc spring group, and the disc spring group is compressed when torque is applied to the pull rod, so that the upper cross beam is deformed, and the locking purpose is realized; the pull rod nut is in contact connection with the locking cylinder through the locking cylinder piston, the locking cylinder works to push out the locking cylinder piston, the disc spring group is further compressed, and the upper cross beam is enabled to recover the initial state, so that the opening purpose is achieved.
The invention can obtain the following technical effects:
1. the system is designed in a frame type, and the size of a test space can be adjusted in a stepless manner; the lifting mode is a combination mode of a motor, a worm gear and a ball screw, and replaces the original hydraulic cylinder to lift;
2. the ball screw is driven by the servo motor to carry out fatigue loading, the structure is simple and optimized, the coverage from a small force value to a large force value (5000N-500KN) can be realized, and the traditional hydraulic cylinder loading mode is replaced;
3. the locking beam is compressed and locked by adopting the disc spring set, and the beam is loosened to further compress the disc spring set to be opened; the mechanical structure avoids using an oil source and an oil cylinder, and is simple, efficient and noiseless;
4. the locking nut is matched with the expansion sleeve for use, so that the host is stable and free of shaking;
drawings
Fig. 1 is a schematic diagram of the overall structure of a fatigue loading system according to an embodiment of the present invention.
Fig. 2 is a structural diagram of a loading frame of a fatigue loading system according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an electric cylinder structure of a fatigue loading system according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a beam lifting mechanism of a fatigue loading system according to an embodiment of the invention.
Fig. 5 is a schematic diagram of a beam locking mechanism of a fatigue loading system according to an embodiment of the present invention.
Wherein the reference numerals include:
the device comprises a loading frame 1, an electric cylinder 2, a beam lifting mechanism 3, a beam locking mechanism 4, an upper beam 1.1, a lower beam 1.2, a supporting upright post 1.3, a positioning plate 1.4, an expansion sleeve 1.5, a locking nut 1.6, a servo motor 2.1, a speed reducer 2.2, a ball screw 2.3, a cylinder barrel 2.4, an electric cylinder piston 2.5, a load sensor 2.6, a ball screw 2.7, a stepping motor 3.1, a coupler 3.2, a bearing 3.3, a worm wheel 3.4, a worm 3.5, a lifting screw 3.6, a lifting screw 3.7, a pull rod 4.1, a pull rod nut 4.2, a disc spring group 4.3, a gasket 4.4, a locking cylinder piston 4.5, a locking cylinder 4.6 and a gap 4.7.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention.
A fatigue loading system provided by the present invention will be described in detail below.
Fig. 1 is a block diagram showing the overall structure of a fatigue loading system according to the present invention.
As shown in fig. 1, an overall structure of a fatigue loading system according to an embodiment of the present invention includes: the device comprises a loading frame 1 for limiting a test space and an electric cylinder 2 which is fixed on the loading frame 1 and used for carrying out fatigue loading; the electric cylinder 2 is driven by the servo motor 2.1 to carry out fatigue loading in an electric servo closed-loop control mode, and the output end of the electric cylinder 2 is abutted to the sample and linearly reciprocates under the drive of the servo motor 2.1. The test sample is fixed on a lower beam 1.2 of the loading frame 1, the loading frame can be adjusted at will according to the size of the sample, and the sample is subjected to fatigue loading through the driving of the servo motor 2.1 after the loading frame is installed.
In one embodiment of the present invention, the fatigue loading system further comprises a beam lifting mechanism 3 and a beam locking mechanism 4; the upper crossbeam 1.1 of the loading frame 1 can move up and down in a stepless regulation way through the crossbeam lifting mechanism 3; the lifting screw nut 3.7 is fixedly connected with the upper cross beam 1.1, and the stepping motor 3.1 drives the lifting screw nut 3.7 matched with the lifting screw nut on the lifting screw rod 3.6 to rotate, so that the lifting screw nut 3.7 rotates and moves up and down along the lifting screw rod 3.6; the effect of adjusting the loading space is achieved.
In one embodiment of the invention, the beam lifting mechanism 3 is driven by a stepping motor 3.1, and the worm wheel 3.4, the worm 3.5 and the lifting screw 3.6 are lifted in a combined mode; the electric cylinder 2 is driven by a servo motor 2.1 and carries out fatigue loading in an electric servo closed-loop control mode; the crossbeam locking mechanism 4 is of a mechanical structure, an elastic tensioning pull rod 4.1 generated by compression of the disc spring group 4.3 is used for locking the upper crossbeam 1.1, a gap 4.7 is reduced, and locking of the upper crossbeam 1.1 is achieved.
FIG. 2 shows a loading frame structure diagram of a fatigue loading system according to the present invention.
As shown in fig. 2, a loading frame 1 of a fatigue loading system according to an embodiment of the present invention includes: the device comprises an upper crossbeam 1.1, a lower crossbeam 1.2, a support upright post 1.3, a positioning plate 1.4, an expansion sleeve 1.5, a locking nut 1.6 and a drag chain 1.7; the upper beam 1.1 and the lower beam 1.2 are arranged in parallel. The supporting upright 1.3 is perpendicular to the upper cross beam 1.1 and the lower cross beam 1.2, the bottom end of the supporting upright is fixed on the lower cross beam 1.2 and penetrates through a through hole of the upper cross beam 1.1, the lifting screw rod 3.6 (see figure 4) is parallel to the supporting upright 1.3 and also perpendicularly penetrates through the upper cross beam 1.1, the bottom of the supporting upright 1.3 is fixed on the lower cross beam 1.2 through an expansion sleeve 1.5, the bottom of the lifting screw rod 3.6 is fixed on the lower cross beam 1.2 through a locking nut 1.6, the tops of the supporting upright 1.3 and the lifting screw rod 3.6 are fixed on a positioning plate 1.4 through the locking nut 1.6, and the positioning plate 1.4 and the locking nut 1.6 are matched with the expansion sleeve 1.5 for use, so that the loading frame. The upper crossbeam 1.1 can move up and down along the supporting upright posts 1.3, and the size of the test space can be adjusted in a stepless manner. The rear part of the upper cross beam 1.1 is fixed with a drag chain 1.7 through a screw, the lower end of the drag chain 1.7 is connected with the lower cross beam 1.2 through a screw, and when the upper cross beam 1.1 moves up and down, the drag chain 1.7 moves up and down along with the upper cross beam.
Fig. 3 shows a diagram of an electric cylinder structure of a fatigue loading system of the present invention.
As shown in fig. 3, an electric cylinder 2 of a fatigue loading system according to an embodiment of the present invention includes: the device comprises a servo motor 2.1, a speed reducer 2.2, a ball screw 2.3, a cylinder barrel 2.4, an electric cylinder piston 2.5 and a load sensor 2.6 which are connected in sequence; when the electric cylinder 2 works for fatigue loading, the electric cylinder 2 is fixedly connected with the upper cross beam 1.1 through a cylinder barrel 2.4; the servo motor 2.1 is fixedly connected with the speed reducer 2.2, the servo motor 2.1 provides output torque and rotating speed, and the ratio change is carried out through the speed reducer 2.2; speed reducer 2.2 passes through ball screw 2.7 swing joint with ball 2.3, with power transmission for ball 2.7 on the ball 2.3, drive ball 2.7 and rotate, ball 2.7 rotates the back and drives ball 2.3 and carry out linear motion to accomplish the action that the straight line stretches out/withdraws, electric cylinder piston 2.5 is connected to ball 2.3's the other end, electric cylinder piston 2.5 tip is equipped with load cell 2.6 and detects the size of output power. The electric mode is used for dynamic fatigue loading to replace the traditional hydraulic cylinder loading mode, the structure is simple and optimized, and the coverage from a small force value to a large force value (5000N-500KN) can be realized.
Fig. 4 shows a cross beam lift mechanism configuration of a fatigue loading system of the present invention.
As shown in fig. 4a and 4b, a beam lifting mechanism 3 of a fatigue loading system according to an embodiment of the present invention includes: a stepping motor 3.1, a coupler 3.2, a bearing 3.3, a worm wheel 3.4, a worm 3.5, a lifting screw rod 3.6 and a lifting screw nut 3.7; the beam lifting mechanism 3 is driven by a motor to lift and replace the original hydraulic cylinder, and the lifting structures on the two sides of the beam are completely consistent; the lifting screw nut 3.7 is fixedly connected with the upper cross beam 1.1, and the stepping motor 3.1 drives the lifting screw nut 3.7 matched with the lifting screw nut on the lifting screw rod 3.6 to rotate, so that the lifting screw nut 3.7 rotates and moves up and down along the lifting screw rod 3.6; the effect of adjusting the loading space is achieved. The step motor 3.1 is provided with the shaft couplings 3.2 at two sides, the shaft couplings 3.2 are connected with the worm 3.5 through the bearings 3.3, the worm wheel 3.4 is driven to rotate through the worm 3.5, when the upper beam 1.1 needs to be lifted, the step motor 3.1 can provide an output torque and a rotating speed, the shaft couplings 3.2 at two sides of the step motor 3.1 transmit the torque and the rotating speed to the worm 3.5, and the worm 3.5 transmits the movement to the worm wheel 3.4, so as to drive the worm wheel 3.4 to rotate; the worm wheel 3.4 is fixedly connected with the lifting screw nut 3.7, the worm wheel 3.4 rotates, namely the lifting screw nut 3.7 rotates, and the lifting screw nut 3.7 moves up and down on the lifting screw nut 3.6 because the lifting screw nut 3.6 is fixed; the lifting screw nut 3.7 is fixedly connected with the upper cross beam 1.1 so as to complete the lifting action of the upper cross beam 1.1.
Fig. 5 shows a cross beam locking mechanism of a fatigue loading system of the present invention.
As shown in fig. 5, a beam locking mechanism 4 of a fatigue loading system according to an embodiment of the present invention includes: 4.1 of a pull rod, 4.2 of a pull rod nut, 4.3 of a disc spring group, 4.4 of a gasket, 4.5 of a locking cylinder piston, 4.6 of a locking cylinder and 4.7 of a gap; the locking of the upper crossbeam 1.1 adopts the elastic force generated by the compression of the disc spring group 4.3 to draw the draw bar 4.1 for locking, and the loosening of the upper crossbeam 1.1 is to further compress the disc spring group 4.3 to open the upper crossbeam 1.1; a gap 4.7 is reserved between the upper cross beam 1.1 and the supporting upright post 1.3, the pull rod 4.1 is connected with the pull rod nut 4.2 through threads, the disc spring group 4.3 is arranged between the pull rod 4.1 and the pull rod nut 4.2, and a gasket 4.4 is arranged in front of and behind the disc spring group 4.3 and used for adjusting the front and rear gaps of the disc spring group 4.3.
When the upper cross beam 1.1 needs to be locked, torque is applied to the pull rod 4.1, the disc spring group 4.3 between the pull rod 4.1 and the pull rod nut 4.2 is compressed, the disc spring group 4.3 generates elastic force to compress the upper cross beam 1.1 during compression, a gap 4.7 is reduced, and the upper cross beam 1.1 deforms to clamp the support upright post 1.3, so that the upper cross beam 1.1 is locked; the draw bar nut 4.2 is in contact connection with the locking cylinder 4.6 through a locking cylinder piston 4.5.
When the upper crossbeam 1.1 needs to be opened, the locking cylinder 4.6 starts to work, the locking cylinder piston 4.5 is pushed out, the disc spring group 4.3 is further compressed, the gap 4.7 between the disc spring group 4.3 is further reduced, so that the gap 4.7 between the upper crossbeam 1.1 and the supporting upright post 1.3 is increased, the upper crossbeam 1.1 is restored to the initial state, no clamping force exists between the upper crossbeam 1.1 and the supporting upright post 1.3, and the upper crossbeam 1.1 can freely move. The whole crossbeam locking mechanism 4 adopts a mechanical structure, avoids using an oil source and an oil cylinder, and is simple, efficient and noiseless.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
The above embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A fatigue loading system, comprising: the fatigue loading device comprises a loading frame (1) for limiting a test space and an electric cylinder (2) fixed on the loading frame (1) and used for carrying out fatigue loading, wherein the electric cylinder (2) is driven by a servo motor (2.1) to carry out fatigue loading in an electric servo closed-loop control mode, and the output end of the electric cylinder (2) is abutted to a test sample and is driven by the servo motor (2.1) to do linear reciprocating motion.
2. A fatigue loading system according to claim 1, further comprising a beam lifting mechanism (3) and a beam locking mechanism (4) for adjusting the test space; the distance between an upper cross beam (1.1) and a lower cross beam (1.2) of the loading frame (1) is steplessly adjusted through a cross beam lifting mechanism (3); the beam locking mechanism (4) is of a mechanical structure, and the upper beam (1.1) is locked by an elastic tensioning pull rod (4.1) generated by compression of the disc spring group (4.3).
3. A fatigue loading system according to claim 1, wherein the loading frame (1) comprises: the device comprises an upper cross beam (1.1), a lower cross beam (1.2) and a support upright post (1.3) for connecting the upper cross beam (1.1) and the lower cross beam (1.2), wherein the upper cross beam (1.1) and the lower cross beam (1.2) are arranged in parallel, and the support upright post (1.3) is vertical to the upper cross beam (1.1) and the lower cross beam (1.2); the number of the supporting columns (1.3) is at least 2 and the supporting columns are parallel to each other.
4. A fatigue loading system according to claim 2, wherein an expansion sleeve (1.5) is arranged on the lower cross beam (1.2), and the bottom end of the support upright (1.3) is fixedly connected with the lower cross beam (1.2) through the expansion sleeve (1.5); the upper cross beam (1.1) is provided with a through hole, the supporting upright post (1.3) vertically penetrates through the through hole, and the through hole is matched with the outer diameter of the supporting upright post (1.3).
5. A fatigue loading system according to claim 3, wherein the loading frame (1) further comprises: a drag chain (1.7) connecting the upper beam (1.1) and the lower beam (1.2); the upper end of a drag chain (1.7) is fixed at the rear part of the upper cross beam (1.1) through a screw, and the lower end of the drag chain (1.7) is connected with the lower cross beam (1.2) through a screw, so as to drive the upper cross beam (1.1) to move up and down by taking the supporting upright post (1.3) as an axis.
6. A fatigue loading system according to claim 1, wherein the electric cylinder (2) for fatigue loading comprises: a servo motor (2.1), a speed reducer (2.2), a ball screw (2.3), a cylinder barrel (2.4), an electric cylinder piston (2.5) and a load sensor (2.6); the electric cylinder (2) is fixedly connected with the upper cross beam (1.1) through the cylinder barrel (2.4); the servo motor (2.1) is fixedly connected with the speed reducer (2.2), the speed reducer (2.2) is movably connected with the ball screw (2.3) through the ball screw nut (2.7), the other end of the ball screw (2.3) is connected with the electric cylinder piston (2.5), and the end part of the electric cylinder piston (2.5) is provided with the load sensor (2.6).
7. A fatigue loading system according to claim 1, wherein said beam lifting mechanism (3) comprises: a stepping motor (3.1), a lifting screw rod (3.6) which is vertical to and penetrates through the upper cross beam (1.1), and a lifting screw nut (3.7) which is matched with the lifting screw rod (3.6); the lifting screw (3.7) is fixedly connected with the upper cross beam (1.1), and the stepping motor (3.1) drives the lifting screw (3.7) to rotate and move up and down along the lifting screw rod (3.6).
8. A fatigue loading system according to claim 1, wherein the beam lifting mechanism (3) further comprises a coupler (3.2), a bearing (3.3), a worm wheel (3.4) and a worm (3.5), the step motor (3.1) is connected with the coupler (3.2), the coupler (3.2) is connected with the worm (3.5) through the bearing (3.3), the worm wheel (3.4) is driven to rotate by the worm (3.5), and the worm wheel (3.4) is fixedly connected with the lifting screw (3.7) to drive the lifting screw (3.7) to rotate.
9. A fatigue loading system according to claim 2, wherein the beam locking mechanism (4) comprises: a pull rod (4.1), a pull rod nut (4.2), a disc spring group (4.3), a gasket (4.4), a locking cylinder piston (4.5) and a locking cylinder (4.6); the pull rod (4.1) is connected with the pull rod nut (4.2) through threads, the disc spring group (4.3) is arranged between the pull rod (4.1) and the pull rod nut (4.2), gaskets (4.4) are arranged in front of and behind the disc spring group (4.3), and the disc spring group (4.3) is compressed when torque is applied to the pull rod (4.1), so that the upper cross beam (1.1) is deformed, and the locking purpose is realized; the pull rod nut (4.2) is in contact connection with the locking cylinder (4.6) through the locking cylinder piston (4.5), the locking cylinder (4.6) works to push out the locking cylinder piston (4.5), and the disc spring group (4.3) is further compressed, so that the upper cross beam (1.1) is restored to the initial state, and the opening purpose is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011262024.6A CN112179757A (en) | 2020-11-12 | 2020-11-12 | Fatigue loading system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011262024.6A CN112179757A (en) | 2020-11-12 | 2020-11-12 | Fatigue loading system |
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| CN112179757A true CN112179757A (en) | 2021-01-05 |
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| CN202011262024.6A Pending CN112179757A (en) | 2020-11-12 | 2020-11-12 | Fatigue loading system |
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| CN112903492A (en) * | 2021-02-01 | 2021-06-04 | 北京工业大学 | Fatigue loading device capable of adjusting height of counter-force cross beam and position of support |
| CN114264459A (en) * | 2021-12-09 | 2022-04-01 | 北京特种机械研究所 | Movable loading test bed |
| CN114459746A (en) * | 2022-02-15 | 2022-05-10 | 上海锐淅医学科技有限公司 | Implant fatigue test equipment |
| CN114459747A (en) * | 2022-02-15 | 2022-05-10 | 上海锐淅医学科技有限公司 | Environment simulation type implant fatigue test equipment |
| CN114484182A (en) * | 2022-02-15 | 2022-05-13 | 上海锐淅医学科技有限公司 | Implant fatigue test equipment support and test equipment |
| CN117516929A (en) * | 2024-01-08 | 2024-02-06 | 德州德迈传动机械有限公司 | Multifunctional screw rod lifter test bed |
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| CN114484182A (en) * | 2022-02-15 | 2022-05-13 | 上海锐淅医学科技有限公司 | Implant fatigue test equipment support and test equipment |
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Application publication date: 20210105 |