CN109030250B - Fatigue strength testing device - Google Patents
Fatigue strength testing device Download PDFInfo
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- CN109030250B CN109030250B CN201810877993.9A CN201810877993A CN109030250B CN 109030250 B CN109030250 B CN 109030250B CN 201810877993 A CN201810877993 A CN 201810877993A CN 109030250 B CN109030250 B CN 109030250B
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- pulley
- fixed wheel
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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
- G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
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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
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
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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
- G01N2203/0037—Generation of the force using mechanical means involving a rotating movement, e.g. gearing, cam, eccentric, or centrifuge effects
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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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- 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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0688—Time or frequency
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The application discloses fatigue strength testing arrangement, including first tight pulley of synchronous pivoted and second tight pulley, first tight pulley is provided with the gear, wheel and rack toothing, the slider fixed connection of rack and slider-crank mechanism, be provided with the certain distance between first tight pulley and the second tight pulley, drive rack reciprocating motion through slider-crank mechanism, the rack drives gear reciprocating rotation, thereby drive first tight pulley reciprocating rotation, second tight pulley and the synchronous reciprocating rotation of first tight pulley, pass through wire rope with the both ends of compensation chain and fix respectively on first tight pulley and second tight pulley, along with the rotation of first tight pulley and second tight pulley, the flexion of compensation chain constantly changes, thereby carry out fatigue strength test to the compensation chain.
Description
Technical Field
The invention relates to the field of testing tools, in particular to a fatigue strength testing device.
Background
When the hoisting height of the car elevator exceeds 30 m, a compensating chain is needed between the counterweight and the car frame. When the elevator is on the top floor, the steel wire rope is on the counterweight side, and the weight of the steel wire rope is increased on the counterweight side; when the elevator is at the bottom floor, the wire ropes are on the car side, which adds to the weight of the wire ropes. Because the steel wire rope has weight, the steel wire rope can generate dynamic unbalance along with the continuous up-and-down motion of the elevator, so the fall can be balanced by adopting the compensation chain to compensate the weight of the steel wire rope, and the elevator can run stably. In the running process of the elevator, two ends of the elevator can be continuously raised or lowered, the compensation chain can have a bent part, and the bending times of the compensation chain are required to be tested when the compensation chain is produced so as to meet the requirement of fatigue strength.
Disclosure of Invention
It is desirable to provide a fatigue strength testing device that tests the bending strength of a compensating chain.
In a first aspect, the fatigue strength testing device comprises a first fixed wheel and a second fixed wheel which rotate synchronously, wherein the first fixed wheel is provided with a gear, the gear is meshed with a rack, the rack is fixedly connected with a sliding block of a slider-crank mechanism, and a certain distance is arranged between the first fixed wheel and the second fixed wheel.
According to the technical scheme that this application embodiment provided, drive rack reciprocating motion through slider-crank mechanism, the rack drives gear reciprocating rotation, thereby drive first tight pulley reciprocating rotation, second tight pulley and the synchronous reciprocating rotation of first tight pulley, pass through wire rope with the both ends of compensation chain and fix respectively on first tight pulley and second tight pulley, along with the rotation of first tight pulley and second tight pulley, the flexion of compensation chain constantly changes, thereby carry out fatigue strength test to the compensation chain.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of a fatigue strength testing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the crank-slider mechanism and the guide rail of the fatigue strength testing apparatus according to the embodiment of the present invention;
fig. 3 is a schematic structural diagram of the fatigue strength testing apparatus according to the embodiment of the present invention, in which a crank-slider mechanism, a guide rail, a rack, and a gear are engaged with each other.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 3, the fatigue strength testing apparatus of the present invention includes a first fixed wheel 10 and a second fixed wheel 20 which rotate synchronously, the first fixed wheel 10 is provided with a gear 11, the gear 11 is engaged with a rack 12, the rack 12 is fixedly connected with a slider 33 of a slider-crank mechanism, and a certain distance is provided between the first fixed wheel 10 and the second fixed wheel 20.
In the embodiment of the invention, the rack is driven to reciprocate by the slider-crank mechanism, the rack drives the gear to reciprocate, so that the first fixed wheel is driven to reciprocate, the second fixed wheel and the first fixed wheel synchronously reciprocate, two ends of the compensation chain are respectively fixed on the first fixed wheel and the second fixed wheel through the steel wire rope, and the bending part of the compensation chain is continuously changed along with the rotation of the first fixed wheel and the second fixed wheel, so that the fatigue strength of the compensation chain is tested.
Can pass through the motion of motor drive slider-crank mechanism to the motor only needs the motion of one-way drive slider-crank mechanism, the motor need not change the direction of rotation, can the energy saving, improves the efficiency of compensation chain fatigue strength test.
Furthermore, the device comprises a first fixing frame 40, wherein the first fixing frame 40 is fixedly connected with a guide rail 41, and the sliding block 33 is in sliding fit with the guide rail 41.
In the embodiment of the invention, the moving direction of the sliding block is guided by the guide rail, so that the sliding block moves in a certain range, and the sliding block is in sliding fit with the guide rail, thereby reducing the friction between the sliding block and the guide rail and prolonging the service life of the sliding block.
Further, the slider-crank mechanism comprises a rotating wheel 31, the rotating wheel 31 is rotatably connected with a connecting rod 32, the connecting rod 32 is rotatably connected with a sliding block 33, and the first fixing frame 40 is rotatably connected with the rotating wheel 31.
In the embodiment of the invention, the rotating wheel can be driven to rotate by the motor, the motor only needs to drive the rotating wheel to rotate in one direction, and the motor can drive the first fixed wheel and the second fixed wheel to rotate back and forth without changing the rotating direction.
Further, a rack 12 is fixed on one side of the sliding block 33 opposite to the guide rail 41.
In the embodiment of the invention, the rack is fixed on one side of the sliding block, which is back to the guide rail, so that the gear is convenient to mount, and the assembly efficiency of the fatigue strength testing device is improved.
Further, the wheel groove of the first fixed wheel 10 is detachably and fixedly connected with a first steel wire rope, and the wheel groove of the second fixed wheel 20 is detachably and fixedly connected with a second steel wire rope.
In an embodiment of the invention, a first steel wire rope is detachably and fixedly connected to the wheel groove of the first fixed wheel, one end of the first steel wire rope is fixed in the wheel groove of the first fixed wheel, and a compensation chain is fixed to the other end of the first steel wire rope, so that when the first fixed wheel rotates, the first steel wire rope can be wound on the first fixed wheel, and the distance between the compensation chain and the first fixed wheel is changed. The race detachably fixedly connected with second wire rope of second tight pulley, through fixing the race of second wire rope's one end at the second tight pulley, second wire rope's the other end is fixed with the compensation chain, when the second tight pulley rotates, can twine second wire rope on the second tight pulley to change the distance between compensation chain and the second tight pulley. Under the driving of the first fixed wheel and the second fixed wheel which continuously rotate, the test of the bending fatigue strength of the compensating chain is realized.
Further, the race spiro union of first fixed pulley 10 has first fastening bolt, and first fastening bolt joint has first wire rope's one end, and the race spiro union of second fixed pulley 20 has second fastening bolt, and second fastening bolt joint has second wire rope's one end.
In the embodiment of the invention, the first fastening bolt is screwed in the wheel groove of the first fixed wheel, and the first fastening bolt is clamped at one end of the first steel wire rope, so that the first steel wire rope is convenient to disassemble and assemble, and can be quickly replaced when the first steel wire rope is damaged. The race spiro union of second tight pulley has second fastening bolt, and second fastening bolt joint has second wire rope's one end, conveniently dismantles second wire rope and installs, when second wire rope damaged, can carry out quick replacement.
Further, a first pulley 61 is arranged below the first fixed pulley 10, a vertical projection of the first pulley 61 and the first fixed pulley 10 has an overlapping portion, a second pulley 62 is arranged below the second fixed pulley 20, and a vertical projection of the second pulley 62 and the second fixed pulley 20 has an overlapping portion.
In the embodiment of the invention, the first steel wire rope can wind around the first pulley and then fix the compensation chain, the second steel wire rope can wind around the second pulley and then fix the compensation chain, and the first pulley and the second pulley can avoid excessive shaking of the compensation chain in the rotation process of the first fixed pulley, so that the accuracy of the fatigue strength test result is improved.
Further, a third pulley 63 is arranged below the first pulley 61, the vertical projection of the first pulley 61 and the third pulley 63 has an overlapping portion, a fourth pulley 64 is arranged below the second pulley 62, and the vertical projection of the second pulley 62 and the fourth pulley 64 has an overlapping portion.
In the embodiment of the invention, through the matching of the first pulley and the third pulley and the matching of the second pulley and the fourth pulley, the shaking of the compensation chain which influences the test result in the test process can be further reduced, and the accuracy of the fatigue strength test result is improved.
Further, the second fixing frame 50 is included, the second fixing frame 50 is provided with a plurality of fixing holes 51, the distances between the plurality of fixing holes 51 and the third pulley 63 are different, and the fourth pulley 64 is detachably and fixedly connected with the fixing holes 51.
In the embodiment of the invention, which fixing hole the fourth pulley is fixedly connected with can be determined according to the actual condition of the compensating chain, so that the applicability of the fatigue strength testing device is improved. And, the fourth pulley of dismouting is very convenient.
Further, the first fixed pulley 10 and the second fixed pulley 20 are driven by a synchronous belt.
In the embodiment of the invention, the synchronous belt transmission has the advantages of wide transmission ratio range, compact structure, low requirement on working environment and capability of adapting to various severe working environments. And the synchronous belt drive is convenient to maintain and has low running cost.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (6)
1. The fatigue strength testing device is characterized by comprising a first fixed wheel and a second fixed wheel which rotate synchronously, wherein the first fixed wheel is provided with a gear which is meshed with a rack, the rack is fixedly connected with a slider of a slider-crank mechanism, and a certain distance is arranged between the first fixed wheel and the second fixed wheel; the first fixed wheel and the second fixed wheel pass through synchronous belt drive, the first wire rope of race detachably fixedly connected with of first fixed wheel, the race detachably fixedly connected with second wire rope of second fixed wheel, the below of first fixed wheel sets up first pulley, first pulley with the vertical projection of first fixed wheel has overlap portion, the below of second fixed wheel sets up the second pulley, the second pulley with the vertical projection of second fixed wheel has overlap portion, first pulley below is provided with the third pulley, first pulley with the vertical projection of third pulley has overlap portion, the second pulley below is provided with the fourth pulley, the second pulley with the vertical projection of fourth pulley has overlap portion, passes through wire rope with the both ends of compensating chain and fixes respectively on first fixed wheel and second fixed wheel, along with the rotation of first fixed wheel and second fixed wheel, the flexion of compensating chain constantly changes to carry out the fatigue strength test to the compensating chain.
2. The fatigue strength testing device of claim 1, comprising a first fixing frame, wherein a guide rail is fixedly connected to the first fixing frame, and the sliding block is in sliding fit with the guide rail.
3. The fatigue strength testing device of claim 2, wherein the slider-crank mechanism comprises a rotating wheel, the rotating wheel is rotatably connected with a connecting rod, the connecting rod is rotatably connected with the slider, and the first fixing frame is rotatably connected with the rotating wheel.
4. A fatigue strength testing device according to claim 2, wherein the rack is fixed to a side of the slider facing away from the rail.
5. The fatigue strength testing device of claim 1, wherein a first fastening bolt is screwed into a wheel groove of the first fixed wheel, the first fastening bolt is clamped with one end of the first steel wire rope, a second fastening bolt is screwed into a wheel groove of the second fixed wheel, and the second fastening bolt is clamped with one end of the second steel wire rope.
6. The fatigue strength testing device of claim 1, comprising a second fixing frame, wherein the second fixing frame is provided with a plurality of fixing holes, the plurality of fixing holes are different from the third pulley in distance, and the fourth pulley is detachably and fixedly connected with the fixing holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810877993.9A CN109030250B (en) | 2018-08-03 | 2018-08-03 | Fatigue strength testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810877993.9A CN109030250B (en) | 2018-08-03 | 2018-08-03 | Fatigue strength testing device |
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| Publication Number | Publication Date |
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| CN109030250A CN109030250A (en) | 2018-12-18 |
| CN109030250B true CN109030250B (en) | 2022-10-25 |
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| CN201810877993.9A Active CN109030250B (en) | 2018-08-03 | 2018-08-03 | Fatigue strength testing device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033670B (en) * | 2020-09-17 | 2021-10-12 | 江苏兴华胶带股份有限公司 | Rotary elevator balance compensation chain testing machine |
| CN115561086B (en) * | 2022-12-05 | 2023-02-17 | 常州市朗科精密机械有限公司 | Servo motor shell multistation synchronous detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216397A (en) * | 2008-01-10 | 2008-07-09 | 上海交通大学 | Elevator armored rope bending fatigue state experimental bench |
| CN107817171A (en) * | 2017-12-05 | 2018-03-20 | 中国航空综合技术研究所 | Be open cable sheath bend performance testing device and method of testing |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203069364U (en) * | 2013-01-05 | 2013-07-17 | 南通通洋机电制造有限公司 | A compensating chain fatigue testing machine |
| CN203629987U (en) * | 2013-12-20 | 2014-06-04 | 展鹏科技股份有限公司 | Device for testing durability of steel wire rope for elevator door motor |
| CN105352827B (en) * | 2015-12-11 | 2018-06-01 | 重庆迈高电梯有限公司 | Steel wire rope and trailing cable repeated bend test system |
| CN205192895U (en) * | 2015-12-11 | 2016-04-27 | 重庆迈高电梯有限公司 | Wire rope and retinue cable bending fatigue test system |
| CN105675415B (en) * | 2016-03-02 | 2018-06-19 | 浙江理工大学 | A kind of arch elevator dragging wire rope fatigue tester |
| CN106927329B (en) * | 2017-05-03 | 2023-05-05 | 海门圣帕斯电梯配件有限公司 | Elevator compensation chain dynamic performance detection equipment |
| CN207336264U (en) * | 2017-08-22 | 2018-05-08 | 浙江理工大学 | A kind of traction steel-cable fatigue bending machine of actuated by cams |
| CN107601200A (en) * | 2017-10-16 | 2018-01-19 | 宣城市华菱精工科技股份有限公司 | A kind of compensating cable of elevator detection means |
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- 2018-08-03 CN CN201810877993.9A patent/CN109030250B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216397A (en) * | 2008-01-10 | 2008-07-09 | 上海交通大学 | Elevator armored rope bending fatigue state experimental bench |
| CN107817171A (en) * | 2017-12-05 | 2018-03-20 | 中国航空综合技术研究所 | Be open cable sheath bend performance testing device and method of testing |
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| CN109030250A (en) | 2018-12-18 |
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Effective date of registration: 20220921 Address after: No. 555, Zhennan Road, Haian High-tech Zone, Nantong City, Jiangsu Province, 226602 Applicant after: Nantong Zhongli Technology Co.,Ltd. Address before: No.529 Zhennan Road, hi tech Zone, Hai'an City, Nantong City, Jiangsu Province Applicant before: NANTONG TONGYANG MECHANICAL AND ELECTRICAL MANUFACTURE Co.,Ltd. |
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