CN112461641A - One-way thread transmission static force loading device - Google Patents
One-way thread transmission static force loading device Download PDFInfo
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- CN112461641A CN112461641A CN202011423467.9A CN202011423467A CN112461641A CN 112461641 A CN112461641 A CN 112461641A CN 202011423467 A CN202011423467 A CN 202011423467A CN 112461641 A CN112461641 A CN 112461641A
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- 230000003068 static effect Effects 0.000 title claims abstract description 17
- 238000012360 testing method Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
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Abstract
The invention discloses a unidirectional thread transmission static force loading device which mainly comprises a thread pair transmission part, a loading head part, a fixed cylinder, an annular force transducer and a thrust bearing, wherein the loading head part is arranged on the fixed cylinder; the screw pair transmission part comprises a screw transmission rod, an end cover matched with the screw transmission rod and an operating handle; the loading head comprises a connecting column, a drawing rod, a butting nut and a loading replacement head which is replaced according to different loading surfaces; the lower end face of the annular force transducer is contacted with the upper end face of the connecting column, and the upper end face of the annular force transducer is contacted with the thrust bearing; the connecting column, the annular force measuring sensor and the thrust bearing are all arranged in the cylinder body of the fixed cylinder. The invention has the advantages of reasonable structure, flexible and wide application, safety, reliability, accurate loading force and simple and convenient operation in the loading process.
Description
Technical Field
The invention relates to the technical field of test loading, in particular to a one-way thread transmission static loading device.
Background
The loading device is an important component in the process of a mechanical test and is an external load source acting on a tested piece, wherein the static test has no requirement on the periodic change of the loaded external load, so that the loading device only needs to maintain a stable one-way load during the static test. However, the existing static force testing machine is limited by size and field, and cannot load large-scale test pieces, and most of the existing static force testing machines still adopt hydraulic and pneumatic actuating cylinders to apply loads, so that the existing static force testing machine cannot flexibly deal with the loading direction of a special angle, and is high in price, complex in installation and high in requirement on the environment of an experimental field. Therefore, the unidirectional static test loading device which is simple in structure, flexible and wide in application, safe and reliable and accurate in loading force can be widely applied.
Disclosure of Invention
The invention aims to provide a one-way thread transmission static loading device to solve the problems in the background technology. In order to achieve the above object, the present invention provides the following technical solutions.
A unidirectional thread transmission static force loading device mainly comprises a thread pair transmission part, a loading head part, a fixed cylinder, an annular force transducer and a thrust bearing; the screw thread pair transmission part comprises a screw thread transmission rod, an end cover matched with the screw thread transmission rod and an operating handle; the loading head comprises a connecting column, a drawing rod, a butting nut and a loading replacement head which is replaced correspondingly according to different required loading surfaces; one end of the thrust bearing is matched with the lower end of the threaded transmission rod, and the other end of the thrust bearing is in contact with the upper end face of the annular force transducer; the lower end face of the annular force transducer is in contact with the upper end face of the connecting column; the connecting column, the annular force measuring sensor and the thrust bearing are all arranged in the cylinder body of the fixed cylinder.
Furthermore, an internal thread hole is designed in the center of the end cover and used for being matched with an external thread on the threaded transmission rod; the operating handle is inserted into a circular groove in the upper part of the threaded transmission rod, and the circular groove is symmetrically arranged on two sides of the threaded transmission rod; the end cover is fixedly connected with the fixed cylinder through screws uniformly distributed along the circumferential direction.
Further, the threaded transmission rod is designed into a hollow structure for the pull rod to pass through; the length of the rod head at the upper end of the pull rod is larger than the diameter of the through hole of the threaded transmission rod; the pull rod sequentially penetrates through the threaded transmission rod, the thrust bearing and the annular force measuring sensor, and the lower end of the pull rod is provided with an external thread which is matched with an internal thread hole in the upper end of the connecting column and is designed to prevent the opposite-top nut from loosening.
Furthermore, the threaded transmission rod, the end cover, the connecting column, the pull rod, the loading replacement head, the fixed cylinder, the annular force measuring sensor and the thrust bearing are coaxial.
Furthermore, the upper end of the fixed cylinder is provided with a flange which is connected with the test bed or the fixed frame, and the middle of the fixed cylinder is provided with a slotted hole for the outer lead cable of the annular force transducer to pass through.
The working principle of the invention is as follows: during loading, different loading replacement heads are selected according to different loading surfaces, the outer ring of a disc at the upper end of a fixed cylinder is connected with a test bed or a fixed frame through a bolt, a force which is perpendicular to the axis of a threaded transmission rod and the axis of an operating handle is applied to the tail end of the operating handle, so that the upper end of the threaded transmission rod generates a torque to drive the threaded transmission rod to perform threaded transmission through an inner threaded hole of an end cover, a thrust bearing is driven to press down an annular force-measuring sensor, a connecting column is pressed down to move in the inner cavity of the fixed cylinder, and the force of the threaded transmission is transmitted to the loading replacement heads to finally apply loads to the loading surfaces; when unloading, applying a force opposite to the direction during loading to the tail end of the operating handle, screwing out the threaded transmission rod upwards, and pulling the pull rod upwards to enable the loading replacement head to leave the test piece loading surface; and the annular force transducer feeds back the load application condition in real time in the whole working process.
The invention has the beneficial effects that: the static force loading device for the one-way thread transmission is convenient, flexible and cheap to load in a static test, novel in design thought, simple and reliable in structure, capable of feeding back a terminal load more accurately by introducing the annular force transducer, capable of ensuring that the surface of the transducer is not influenced by abrasion by adding the thrust bearing, capable of providing different loading replacement heads for different loading surfaces and loading conditions and capable of being replaced according to the requirements of working conditions.
Drawings
The invention is further explained by the accompanying drawings.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an exploded view of the present invention.
FIG. 3 is a schematic view of the internal structure of the present invention.
FIG. 4 is a schematic view of a loading head of the present invention.
In the figure: 1-thread pair transmission part, 2-loading head, 3-fixed cylinder, 4-annular force transducer, 5-thrust bearing, 11-thread transmission rod, 111-circular groove, 12-end cover, 13-operating handle, 21-connecting column, 22-drawing rod, 221-rod head, 23-opposite nut, 24-loading replacement head, 241-triangular inclined plane loading replacement head, 242-rectangular plane loading replacement head, 31-slotted hole and 32-flange.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
A unidirectional thread transmission static force loading device is shown in the figure and mainly comprises a thread pair transmission part 1, a loading head part 2, a fixed cylinder 3, an annular force transducer 4 and a thrust bearing 5; the screw pair transmission part 1 is characterized by comprising a screw transmission rod 11, an end cover 12 matched with the screw transmission rod 11 and an operating handle 13; the loading head part 2 comprises a connecting column 21, a drawing rod 22, a butting nut 23 and a loading replacement head 24 which is replaced correspondingly according to different required loading surfaces; one end of the thrust bearing 5 is matched with the lower end of the threaded transmission rod 11, and the other end of the thrust bearing is in contact with the upper end face of the annular force measuring sensor 4; the lower end face of the annular force transducer 4 is in contact with the upper end face of the connecting column 21; the connecting column 21, the annular force measuring sensor 4 and the thrust bearing 5 are all arranged in the cylinder body of the fixed cylinder 3.
Further, an internal thread hole is designed in the center of the end cover 12 and used for being matched with an external thread on the threaded transmission rod 11; the operating handle 13 is inserted into a circular groove 111 at the upper part of the threaded transmission rod 11, and the circular groove 111 is symmetrically arranged at two sides of the threaded transmission rod 11; the end cover 12 is fixedly connected with the fixed cylinder 3 through screws uniformly distributed along the circumferential direction.
Further, the threaded transmission rod 11 is designed into a hollow structure for the drawing rod 22 to pass through; the length of the upper end rod head 221 of the pull rod 22 is larger than the diameter of the through hole of the threaded transmission rod 11; the drawing rod 22 sequentially penetrates through the threaded transmission rod 11, the thrust bearing 5 and the annular force measuring sensor 4, and the lower end of the drawing rod is provided with an external thread which is matched with an internal thread hole in the upper end of the connecting column 21, and the opposite-top nut 23 is designed to be anti-loose.
Further, the threaded transmission rod 11, the end cover 12, the connecting column 21, the pull rod 22, the loading replacement head 24, the fixed cylinder 3, the annular load cell 4 and the thrust bearing 5 are coaxial.
Furthermore, the upper end of the fixed cylinder 3 is provided with a flange 32 connected with a test bed or a fixed frame, and the middle of the fixed cylinder is provided with a slotted hole 31 for the external lead cable of the annular force transducer 4 to pass through.
The working principle of the invention is as follows: during loading, different loading replacement heads 24 are selected according to different loading surfaces, the outer ring of a flange 32 at the upper end of a fixed cylinder 3 is connected with a test bed or a fixed rack through a bolt, a force which is perpendicular to the axis of a threaded transmission rod 11 and perpendicular to the axis of the operating handle 13 is applied to the tail end of the operating handle 13, so that the upper end of the threaded transmission rod 11 generates a torque to drive the threaded transmission rod 11 to perform threaded transmission through an internal threaded hole of an end cover 12, a thrust bearing 5 is driven to press down an annular force measuring sensor 4 and further press down a connecting column 21 to move in the inner cavity of the fixed cylinder 3, and the force of the threaded transmission is transmitted to the loading replacement heads 24 to finally apply a load on the loading surfaces; when unloading, a force in the direction opposite to that during loading is applied to the tail end of the operating handle 13, the threaded transmission rod 11 is screwed out upwards, and then the pull rod 22 is pulled upwards to enable the loading replacement head 24 to leave the test piece loading surface; the annular force cell 4 feeds back the load application condition in real time in the whole working process.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. A unidirectional thread transmission static force loading device mainly comprises a thread pair transmission part (1), a loading head part (2), a fixed cylinder (3), an annular force transducer (4) and a thrust bearing (5); the screw thread pair transmission part (1) is characterized by comprising a screw thread transmission rod (11), an end cover (12) matched with the screw thread transmission rod (11) and provided with internal screw threads, and an operating handle (13) capable of being quickly detached; the loading head (2) comprises a connecting column (21), a drawing rod (22), a butting nut (23) and a loading replacement head (24) which is replaced correspondingly according to different required loading surfaces; the upper ring of the thrust bearing (5) is matched with the stepped shaft section at the lower end of the threaded transmission rod (11), and the lower ring is in annular contact with the upper end of the annular force transducer (4); the ring surface of the lower end of the annular force transducer (4) is in contact with the upper end surface of the connecting column (21); the connecting column (21), the annular force measuring sensor (4) and the thrust bearing (5) are all arranged in the cylinder body of the fixed cylinder (3).
2. A single direction screw drive static force loading apparatus as claimed in claim 1, wherein: one or two operating handles (13) are inserted into a circular groove (111) at the upper part of the threaded transmission rod (11) according to requirements, and the circular groove (111) is symmetrically arranged at two sides of the threaded transmission rod (11); the end cover (12) is fixedly connected with the fixed cylinder (3) through screws uniformly distributed along the circumferential direction; the threaded transmission rod (11) is designed into a hollow structure for the pull rod (22) to pass through; the length of a rod head (221) at the upper end of the pull rod (22) is larger than the diameter of the through hole of the threaded transmission rod (11); the drawing rod (22) sequentially penetrates through the threaded transmission rod (11), the thrust bearing (5) and the annular force measuring sensor (4), an external thread is machined at the lower end of the drawing rod to be matched with an internal thread hole at the upper end of the connecting column (21), and the opposite-top nut (23) is arranged for preventing looseness; the upper end of the fixed cylinder (3) is provided with a flange (32) which is connected with a test bed or a fixed frame and is provided with a slotted hole (31) for the outer lead cable of the annular force transducer (4) to pass through; the threaded transmission rod (11), the end cover (12), the connecting column (21), the drawing rod (22), the loading replacement head (24), the fixed cylinder (3), the annular force measuring sensor (4) and the thrust bearing (5) are coaxial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011423467.9A CN112461641B (en) | 2020-12-08 | 2020-12-08 | One-way thread transmission static force loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011423467.9A CN112461641B (en) | 2020-12-08 | 2020-12-08 | One-way thread transmission static force loading device |
Publications (2)
| Publication Number | Publication Date |
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| CN112461641A true CN112461641A (en) | 2021-03-09 |
| CN112461641B CN112461641B (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011423467.9A Expired - Fee Related CN112461641B (en) | 2020-12-08 | 2020-12-08 | One-way thread transmission static force loading device |
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| CN (1) | CN112461641B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607404A (en) * | 2021-09-16 | 2021-11-05 | 哈尔滨理工大学 | Threaded tension-compression loading device with direction-changeable pin hole |
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|---|---|---|---|---|
| US5598738A (en) * | 1995-04-03 | 1997-02-04 | Lockheed Idaho Technologies Company | Load apparatus and method for bolt-loaded compact tension test specimen |
| CN201573165U (en) * | 2009-12-15 | 2010-09-08 | 奇瑞汽车股份有限公司 | Multi-purpose repair tool for angle encoder |
| CN201749059U (en) * | 2010-07-02 | 2011-02-16 | 贵州风雷航空军械有限责任公司 | Loading device for test |
| CN104215441A (en) * | 2014-08-22 | 2014-12-17 | 上海交通大学 | Dynamic radial loading mechanism and stability test scheme for vertical rotor |
| CN204405302U (en) * | 2014-09-14 | 2015-06-17 | 沈机集团昆明机床股份有限公司 | A kind of machine tool chief axis three axis force charger |
| CN104942565A (en) * | 2015-06-26 | 2015-09-30 | 中国工程物理研究院机械制造工艺研究所 | Continuous no-impact automatic uniform-load press-fitting device |
| CN104990805A (en) * | 2015-06-26 | 2015-10-21 | 上海交通大学 | Portable tester for static indentation damage prefabricating of large-scaled composite material structure |
| CN105563163A (en) * | 2014-10-08 | 2016-05-11 | 西安志越机电科技有限公司 | Spring driven type cylindrical work piece quick pressing apparatus |
| CN108827635A (en) * | 2018-09-06 | 2018-11-16 | 陕西科技大学 | A kind of rolling bearing engaging portion static characteristic measuring device and method |
| CN209372580U (en) * | 2018-12-13 | 2019-09-10 | 西安工业大学 | A kind of rotary main shaft cylinder loading device |
| CN209741937U (en) * | 2019-01-25 | 2019-12-06 | 江苏扬建集团有限公司 | Vertical loading device for pile foundation model test |
-
2020
- 2020-12-08 CN CN202011423467.9A patent/CN112461641B/en not_active Expired - Fee Related
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5598738A (en) * | 1995-04-03 | 1997-02-04 | Lockheed Idaho Technologies Company | Load apparatus and method for bolt-loaded compact tension test specimen |
| CN201573165U (en) * | 2009-12-15 | 2010-09-08 | 奇瑞汽车股份有限公司 | Multi-purpose repair tool for angle encoder |
| CN201749059U (en) * | 2010-07-02 | 2011-02-16 | 贵州风雷航空军械有限责任公司 | Loading device for test |
| CN104215441A (en) * | 2014-08-22 | 2014-12-17 | 上海交通大学 | Dynamic radial loading mechanism and stability test scheme for vertical rotor |
| CN204405302U (en) * | 2014-09-14 | 2015-06-17 | 沈机集团昆明机床股份有限公司 | A kind of machine tool chief axis three axis force charger |
| CN105563163A (en) * | 2014-10-08 | 2016-05-11 | 西安志越机电科技有限公司 | Spring driven type cylindrical work piece quick pressing apparatus |
| CN104942565A (en) * | 2015-06-26 | 2015-09-30 | 中国工程物理研究院机械制造工艺研究所 | Continuous no-impact automatic uniform-load press-fitting device |
| CN104990805A (en) * | 2015-06-26 | 2015-10-21 | 上海交通大学 | Portable tester for static indentation damage prefabricating of large-scaled composite material structure |
| CN108827635A (en) * | 2018-09-06 | 2018-11-16 | 陕西科技大学 | A kind of rolling bearing engaging portion static characteristic measuring device and method |
| CN209372580U (en) * | 2018-12-13 | 2019-09-10 | 西安工业大学 | A kind of rotary main shaft cylinder loading device |
| CN209741937U (en) * | 2019-01-25 | 2019-12-06 | 江苏扬建集团有限公司 | Vertical loading device for pile foundation model test |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607404A (en) * | 2021-09-16 | 2021-11-05 | 哈尔滨理工大学 | Threaded tension-compression loading device with direction-changeable pin hole |
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| CN112461641B (en) | 2022-01-04 |
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Granted publication date: 20220104 |