CN108709817B - Flexible shaft torsion performance test device - Google Patents
Flexible shaft torsion performance test device Download PDFInfo
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- CN108709817B CN108709817B CN201810756857.4A CN201810756857A CN108709817B CN 108709817 B CN108709817 B CN 108709817B CN 201810756857 A CN201810756857 A CN 201810756857A CN 108709817 B CN108709817 B CN 108709817B
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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
- G01N3/26—Investigating twisting or coiling properties
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the field of torsion performance tests, in particular to a flexible shaft torsion performance test device. The method comprises the following steps: flexible axle (7), rotation axis (2), bush (8) and weight (13). In the device, in the test process, the axial force is restricted by the deep groove ball bearing (5), the application of the torque is only influenced by the friction force between the inner ring and the outer ring of the bearing (5), the friction coefficient between the inner ring and the outer ring of the bearing is small, and the generated error can be ignored; the torque is restrained by the gasket (10), the influence on the axial force is mainly reflected by the elastic force generated when the gasket (10) is bent, and the elastic force is smaller when the gasket (10) is thinner and generates axial bending deformation and can be offset by a calibration method in the test process, so that the torque can effectively exert restraint on the flexible shaft (7) in the torsion direction; the torque wrench is used for applying torque to the flexible shaft (7), and compared with the existing test device, the test device is loaded through the weight and the pulley, so that the error caused by friction force is reduced.
Description
Technical Field
The invention relates to the field of torsion performance tests, in particular to a flexible shaft torsion performance test device.
Background
As shown in figure 1, in a reverse thrust device flexible shaft torsion performance test, one end (a fixed point A) of a flexible shaft is fixed on a tester, axial force is applied to the end along the length direction of the flexible shaft to straighten the flexible shaft, the other end (a fixed point B) of the flexible shaft is fixed, torque is applied by rotating right, and a torsion angle of the flexible shaft is measured.
The existing test scheme, as shown in fig. 2, comprises a weight 13, a pulley 15, a second fixture 9 at a fixed point a, a flexible shaft 7, a first fixture 6 at a fixed point B, a rotating shaft 2, a bearing 5, a fixed seat 4, a pointer 1, a gasket 10, a guide rail 14, a dial 3 and a torsion disc 16. One end of a flexible shaft 7 is fixed by a second clamp 9 at a fixing point A, wherein the second clamp 9 at the fixing point A is connected with a guide rail 14; the other end is fixed by a first clamp 6 at a fixed point B, the first clamp 6 at the fixed point B is fixed on the rotating shaft 2, the torsion disc 16 is fixed on the rotating shaft 2, and the pointer 1 is fixed on the torsion disc 16. In the test, the weights 13 are used for applying axial force to the flexible shaft 7 through the second clamp 9 at the fixing point A, the torsion disc 16 is used for applying torque to the flexible shaft 7, and the torsion angle of the flexible shaft 7 is measured through the pointer 1.
The existing test device has the following defects: friction force exists between the second clamp 9 of the fixing point a and the guide rail 14 and between the rotating shaft 2 and the fixed seat 4, so that in the loading process, mutual interference exists between the torque and the axial force, namely the friction force between the second clamp 9 of the fixing point a and the guide rail 14 changes along with the application of the torque, and the friction force between the rotating shaft 2 and the fixed seat 4 increases along with the application of the axial force, so that a large error may exist between the load actually acting on the flexible shaft 7 and the given load.
Disclosure of Invention
The invention aims to provide a flexible shaft torsion performance testing device to solve at least one problem in the prior art.
The technical scheme of the invention is as follows:
a flexible axle torsion performance test device includes:
one end of the flexible shaft is fixedly connected with the first clamp, and the other end of the flexible shaft is fixedly connected with the second clamp;
the rotating shaft is mounted at the end part of the first clamp, a pointer is arranged on the rotating shaft, the rotating shaft is fixed on a fixed seat through a bearing, and a dial is arranged on the fixed seat;
the bushing is fixed on the inner side of the second clamp and is connected with the stand column through a gasket;
and the weight is arranged at the end part of the second clamp.
Optionally, the number of the gaskets and the number of the columns are two, and the two gaskets are respectively and fixedly connected to two ends of the diameter direction of the bushing, tangent to the outer wall surface of the bushing, and arranged in opposite directions.
Optionally, two of the spacers are fixed to the corresponding columns by a double-lug structure.
Optionally, the weight is mounted by providing a binaural structure at the end of the second clamp.
Optionally, the bearing is a deep groove ball bearing.
The invention has the following effects:
in the flexible shaft torsion performance test device, in the test process, the axial force is restricted by the bearing, the application of the torque is only influenced by the friction force between the inner ring and the outer ring of the bearing, and the influence on the torque is small and the generated error can be ignored because the friction coefficient between the inner ring and the outer ring of the bearing is small; the torque is restrained by the gasket, the influence on the axial force is small, the torque can be offset by a calibration method in the test process, and the restraint can be effectively exerted on the flexible shaft in the torsion direction.
Drawings
FIG. 1 is a schematic view of a flexible shaft;
FIG. 2 is a schematic diagram of a flexible shaft torsion performance testing device in the prior art;
FIG. 3 is a cross-sectional view of the flexible shaft torsion performance testing device of the present invention;
FIG. 4 is a schematic view of the connection between the bushing and the washer of the flexible shaft torsion performance testing device of the present invention.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. 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. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
The flexible shaft torsion performance testing device of the invention is further described in detail with reference to fig. 3 to 4.
The invention provides a flexible shaft torsion performance test device, which can comprise: flexible axle 7, rotation axis 2, bush 8 and weight 13.
Specifically, one end of the flexible shaft 7 is fixedly connected with a first clamp 6, the other end of the flexible shaft is fixedly connected with a second clamp 9, a rotating shaft 2 is mounted at the end part of the first clamp 6, a pointer 1 is arranged on the rotating shaft 2, the rotating shaft 2 is fixed on a fixed seat 4 through a bearing 5, and a dial 3 is arranged on the fixed seat 4. In the present embodiment, the bearing 5 is preferably a deep groove ball bearing.
The bush 8 is fixed inside the second clamp 9, and the bush 8 is connected to the column 12 by a spacer 10. In this embodiment, the spacers 10 and the columns 12 both include two, and the two spacers 10 are respectively fixedly connected to two ends of the diameter direction of the bushing 8, tangent to the outer wall surface of the bushing 8, and arranged in the opposite direction. Two pads 10 are fixed to a vertical column 12 by a double-lug structure 11. Further, the shims 10 are all shims. It can be understood that the device adopts the form that the gasket 10 and the cantilever structure thereof restrain the torsional deformation of the flexible shaft 7, the gasket 10 of the cantilever is utilized to restrain the flexible shaft 7 in the torsional direction, the influence of the softer cantilever direction of the gasket 10 on the axial force load is small, but the in-plane rigidity is large, and the torsional deformation can be effectively restrained.
A weight 13 is mounted at the end of the second clamp 9. In this embodiment, a weight 13 is attached by providing a double-lug structure 11 at the end of the second jig 9.
When the flexible shaft torsion performance test device is assembled, firstly, a flexible shaft 7 is vertical, one end of the flexible shaft is fixed on a rotating shaft 2 through a first clamp 6, the rotating shaft 2 is fixed on a fixed seat 4 through a deep groove ball bearing 5, a dial 3 is fixed on the fixed seat 4, and a pointer 1 is fixed on the rotating shaft 2. Then, one end of the gasket 10 is fixed on the upright post 12 through the double-lug structure 11, and the other end of the gasket exerts the constraint of the torsion direction on the other end of the flexible shaft 7 through the bushing 8 on the inner side of the second clamp 9. In the test process, the weights 13 are used for applying axial force to the flexible shaft 7 through the second clamp 9, the torque wrench is used for applying torque to the flexible shaft 7 through the rotating shaft 2 and the first clamp 6, and the torsion angle of the flexible shaft 7 is measured through the pointer 1 and the dial 3. Because the axial force can not generate radial load between the inner ring and the outer ring of the deep groove ball bearing 5, the torque borne by the flexible shaft 7 can not be influenced, and meanwhile, when the gasket 10 generates axial bending deformation, the influence of the generated elastic force on the axial force can be ensured within a reasonable range by calculating the size of the gasket 10.
In conclusion, in the flexible shaft torsion performance test device, in the test process, the axial force is restricted by the deep groove ball bearing 5, the application of the torque is only influenced by the friction force between the inner ring and the outer ring of the bearing 5, and the friction coefficient between the inner ring and the outer ring of the bearing 5 is small, so the influence of the torque is small, and the generated error can be ignored; the torque is restrained by the gasket 10, the influence on the axial force is mainly reflected by the elastic force generated when the gasket 10 is bent, and the elastic force is smaller when the gasket 10 is thinner and generates axial bending deformation and can be counteracted by a calibration method in the test process, and the constraint can be effectively applied to the flexible shaft 7 in the twisting direction; the torque wrench is used for applying torque to the flexible shaft 7, and compared with the existing test device, the test device is loaded through weights and pulleys, and errors caused by friction force are reduced.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (3)
1. The utility model provides a flexible axle torsion performance test device which characterized in that includes:
one end of the flexible shaft (7) is fixedly connected with the first clamp (6), and the other end of the flexible shaft (7) is fixedly connected with the second clamp (9);
the rotating shaft (2) is installed at the end of the first clamp (6), a pointer (1) is arranged on the rotating shaft (2), the rotating shaft (2) is fixed on a fixed seat (4) through a bearing (5), and a dial (3) is arranged on the fixed seat (4);
the bushing (8), the bushing (8) is fixed on the inner side of the second clamp (9), and the bushing (8) is connected with a stand column (12) through a gasket (10);
a weight (13), wherein the weight (13) is arranged at the end part of the second clamp (9);
the two gaskets (10) and the two upright columns (12) are respectively fixedly connected to two ends of the bush (8) in the diameter direction, are tangent to the outer wall surface of the bush (8), and are arranged in opposite directions;
the two gaskets (10) are fixed on the corresponding upright posts (12) through double-lug structures (11).
2. The flexible shaft torsion performance test device according to claim 1, characterized in that the weight (13) is installed by arranging a double-lug structure (11) at the end of the second clamp (9).
3. The flexible shaft torsion performance test device of claim 1, wherein the bearing (5) is a deep groove ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810756857.4A CN108709817B (en) | 2018-07-11 | 2018-07-11 | Flexible shaft torsion performance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810756857.4A CN108709817B (en) | 2018-07-11 | 2018-07-11 | Flexible shaft torsion performance test device |
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| Publication Number | Publication Date |
|---|---|
| CN108709817A CN108709817A (en) | 2018-10-26 |
| CN108709817B true CN108709817B (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810756857.4A Active CN108709817B (en) | 2018-07-11 | 2018-07-11 | Flexible shaft torsion performance test device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132755B (en) * | 2019-05-29 | 2024-04-16 | 新光机电(昆山)有限公司 | Bending-resistant wire tester |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05215657A (en) * | 1992-03-25 | 1993-08-24 | Tokyo Inst Of Technol | Displacement gauge used for tightened screw testing device or the like |
| CN104165809A (en) * | 2014-08-04 | 2014-11-26 | 常熟市环境试验设备有限公司 | Cable torsion test device |
| CN104198303A (en) * | 2014-09-02 | 2014-12-10 | 湖北航天技术研究院总体设计所 | Device for measuring creep of torsion bar |
| KR20150138444A (en) * | 2014-05-29 | 2015-12-10 | 영남대학교 산학협력단 | Controlling method torsion testing machine and torsion testing machine |
| CN105571958A (en) * | 2016-01-14 | 2016-05-11 | 南京航空航天大学 | Large-diameter high-strength composite circular tube torsion test device and test method thereof |
| CN107179251A (en) * | 2017-06-12 | 2017-09-19 | 南京工程学院 | A kind of girder steel constraint torsion experimental rig |
| CN108168999A (en) * | 2017-12-14 | 2018-06-15 | 咸阳宝石钢管钢绳有限公司 | A kind of wire rope torque and torsion angle measurement device and its assay method |
-
2018
- 2018-07-11 CN CN201810756857.4A patent/CN108709817B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05215657A (en) * | 1992-03-25 | 1993-08-24 | Tokyo Inst Of Technol | Displacement gauge used for tightened screw testing device or the like |
| KR20150138444A (en) * | 2014-05-29 | 2015-12-10 | 영남대학교 산학협력단 | Controlling method torsion testing machine and torsion testing machine |
| CN104165809A (en) * | 2014-08-04 | 2014-11-26 | 常熟市环境试验设备有限公司 | Cable torsion test device |
| CN104198303A (en) * | 2014-09-02 | 2014-12-10 | 湖北航天技术研究院总体设计所 | Device for measuring creep of torsion bar |
| CN105571958A (en) * | 2016-01-14 | 2016-05-11 | 南京航空航天大学 | Large-diameter high-strength composite circular tube torsion test device and test method thereof |
| CN107179251A (en) * | 2017-06-12 | 2017-09-19 | 南京工程学院 | A kind of girder steel constraint torsion experimental rig |
| CN108168999A (en) * | 2017-12-14 | 2018-06-15 | 咸阳宝石钢管钢绳有限公司 | A kind of wire rope torque and torsion angle measurement device and its assay method |
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| CN108709817A (en) | 2018-10-26 |
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