CN113916520B - Locking test tool for lug-free supporting plate self-locking nut - Google Patents
Locking test tool for lug-free supporting plate self-locking nut Download PDFInfo
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- CN113916520B CN113916520B CN202111172170.4A CN202111172170A CN113916520B CN 113916520 B CN113916520 B CN 113916520B CN 202111172170 A CN202111172170 A CN 202111172170A CN 113916520 B CN113916520 B CN 113916520B
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- 238000012360 testing method Methods 0.000 title claims abstract description 95
- 230000006835 compression Effects 0.000 claims abstract description 50
- 238000007906 compression Methods 0.000 claims abstract description 50
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000011056 performance test Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 10
- 230000009471 action Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention belongs to the technical field of performance tests of self-locking nuts for aviation fastening, and particularly relates to a locking test tool for an ear-free supporting plate self-locking nut. The tool comprises a base, a base plate and a compression screw sleeve; the backing plate is provided with a counter bore which is matched with the shape of the tested self-locking nut; the base is provided with a stepped base hole which can form a stop fit with the base plate so that the base plate is clamped into the base; the compression screw sleeve is provided with a wrenching section and a threaded connection section, can be screwed into the base, and is also provided with a compression screw sleeve hole for the test bolt to pass through. According to the self-locking nut clamping device, the self-locking nut is clamped through the backing plate and the compression screw sleeve, so that the damage to the nut caused by direct clamping is avoided, and the waste of a test tool caused by fixing the self-locking nut in a riveting manner is avoided; the self-locking nut is fixed through the stop fit of the base and the threaded connection of the base and the compression screw sleeve, other fasteners are not needed any more, the assembly and the disassembly of the tool are more convenient and quick, the efficiency is improved, and the test period is shortened.
Description
Technical Field
The invention belongs to the technical field of performance tests of self-locking nuts for aviation fastening, and particularly relates to a locking test tool for an ear-free supporting plate self-locking nut.
Background
The ear-free supporting plate self-locking nut is used as a novel fastener and comprises an expanding head, a rivet pulling deformation part and a threaded connection part, and the structural design of the novel fastener realizes the combination of the rivet nut and the self-locking nut and has the riveting function and the self-locking performance. The expansion head adopts an ellipse-like structure, and provides anti-torsion moment in the process of installing and dismantling the bolt, so that the nut body is effectively prevented from rotating; the thread connection part is closed and locked to play a role in looseness prevention and vibration resistance. The lug-free supporting plate self-locking nut mounting process has the advantages of reducing structural fatigue sources, prolonging structural service life and reducing structural total weight without rivet holes. The nut is widely used on foreign airplanes at present, and replaces the prior nut which is fixedly connected with the structure through drilling and riveting.
The nut closing technology is a method of machining, and the shape of a nut closing area is changed, so that the nut and the bolt form interference fit. During the use, a certain friction moment is generated on the contact surface of the nut and the bolt, so that loosening is prevented, and self-locking is realized. Therefore, the locking moment is an important assessment index of the self-locking nut.
When a locking test is carried out, the self-locking nut is required to be fixed, then the test bolt is screwed in and out of the self-locking nut through a testing machine, and the locking moment of the self-locking nut is measured in the screwing-in and out process. Because the self-locking nut is a thin-wall piece, the head type is special and limited by the product structure, the excircle and the head of the self-locking nut cannot be directly clamped, the self-locking nut is required to be riveted on the sandwich plate for test, and the sandwich plate and the self-locking nut are abandoned after the test is completed. The whole test process is long in period and complex in operation, test tools such as the sandwich plate cannot be reused, and test cost is high.
Chinese patent publication No. CN210834153U discloses a locking test device for a self-locking nut of an ear-free supporting plate. The device comprises a testing device bottom plate, a testing device cover plate and a locking testing core rod. When the locking device is used, the self-locking nut is fixed through the bottom plate of the test device and the cover plate of the test device, and then a locking test is carried out by using the locking test core rod. However, the fixing of the bottom plate and the cover plate in the device needs a plurality of bolts to be completed, so that the bolts need to be repeatedly screwed down and withdrawn during the test, the process is tedious, and the test efficiency is low.
Disclosure of Invention
The invention aims to provide an ear-free supporting plate self-locking nut locking test tool which is used for solving the technical problem that the self-locking nut test efficiency is low in the existing self-locking nut locking test.
The invention relates to an ear-free supporting plate self-locking nut locking test tool which adopts the following technical scheme:
The utility model provides an ear-free layer board auto-lock nut locking test frock includes:
the base is used for being clamped by the torque testing machine and provided with a base hole;
The base plate is arranged in the base hole and is matched with the base stop along the axial direction of the base hole, and a base plate hole is formed in the base plate;
The compression screw sleeve is in threaded connection with the base threaded hole and is used for being screwed into the base hole to be matched with the backing plate to axially compress the expansion head of the self-locking nut along the base hole;
The compression screw sleeve is provided with a compression screw sleeve hole, one of the compression screw sleeve hole and the cushion plate hole is used for being matched with the outer wall surface of the self-locking nut in a positioning way, and the other one of the compression screw sleeve hole and the cushion plate hole is used for being connected with the self-locking nut in a threaded way after a test bolt passes through.
The beneficial effects are that: the self-locking nut locking test tool clamps the self-locking nut through the compression screw sleeve and the base plate, and the compression screw sleeve and the base plate are fixed in the base hole at the same time, so that the operation is more convenient, and the problem of low locking test efficiency at present is solved. When the locking test is carried out, the testing machine clamps the base, so that the self-locking nut is prevented from being directly clamped, and the self-locking nut is effectively protected.
Further, the base hole is a step hole and is provided with a base plate peripheral locating surface matched with the base plate peripheral locating surface and a base plate blocking surface matched with the base plate along the base hole in an axial blocking way. The base hole is set to be the step hole, has realized the location and the backstop to the backing plate for the backing plate is difficult to rock, and the assembly is simple reliable.
Further, the base hole comprises a threaded section, a base plate positioning section and an avoidance section, the inner peripheral surface of the base plate positioning section forms the outer peripheral positioning surface of the base plate, the avoidance section is used for the self-locking nut and the test bolt to extend in, the threaded section is used for being in threaded connection with the compression screw sleeve, the inner diameter of the threaded section is larger than that of the base plate positioning section, and the inner diameter of the base plate positioning section is larger than that of the avoidance section. The difference of the inner diameters of the threaded section and the locating end section of the backing plate avoids mutual interference between the backing plate and the threaded section, and the backing plate is convenient to be put in and taken out.
Further, the gasket hole is a counter bore for the self-locking nut to pass through, and the counter bore comprises an expansion head positioning section matched with the expansion head of the self-locking nut in shape and a deformation part positioning section matched with the rivet deformation part of the self-locking nut in positioning. The pad hole is arranged as the counter bore and can position the expanding head, so that the compression screw sleeve is convenient to screw in and assemble.
Further, the compression screw sleeve comprises a threaded connection section and a screwing section, a screw sleeve hole is formed in the compression screw sleeve, the threaded connection section is in threaded connection with the base hole, and the screwing section is located outside the base hole and is used for operating the compression screw sleeve to screw into the base hole. The upper pulling and screwing section of the compression screw sleeve is positioned outside the base hole, so that the compression screw sleeve can be conveniently screwed in and screwed out.
Further, the maximum outer diameter dimension of the wrenching section is smaller than the outer diameter of the threaded connection section. The larger outer diameter of the threaded connection section enables larger acting force to exist between the threaded connection section and the base, and the threaded connection section is not easy to loosen.
Furthermore, the outer peripheral surface of the base is provided with a polyhedral surface, so that the clamping of the testing machine is facilitated.
Further, the lug-free supporting plate self-locking nut locking test fixture further comprises an adjusting washer which is sleeved on the test bolt and clamped between the compression screw sleeve and the test bolt. The screwing depth of the test bolt can be controlled by adjusting the arrangement of the gasket.
Further, the base hole is a through hole, so that the processing of the base is simpler.
Further, the diameter of the screw sleeve hole is equal to the diameter of the pad hole.
Drawings
FIG. 1 is an assembly view of a locking tool in the working state of an embodiment 1 of the lug-less pallet self-locking nut locking test tool of the present invention;
FIG. 2 is a schematic structural view of a base in an embodiment 1 of the tool for locking and testing the lug-less supporting plate self-locking nut of the present invention;
Fig. 3 and fig. 4 are schematic structural views of a backing plate in a specific embodiment 1 of the locking test fixture for the lug-less supporting plate self-locking nut of the present invention;
FIG. 5 is a schematic structural view of a compression screw sleeve in a specific example 1 of the tool for locking and testing the lug-less supporting plate self-locking nut of the invention;
In the figure: 1. a base; 11. a base hole; 111. a threaded section; 112. a backing plate positioning section; 113. an avoidance section; 2. a backing plate; 21. pad holes; 211. an expanding head positioning section; 212. a deformation positioning section; 3.a compression screw sleeve; 31. a threaded connection section; 32. a wrenching section; 33. a screw sleeve hole; 4. a self-locking nut; 41. expanding the head; 42. riveting the deformed part; 43. a threaded connection portion; 5. a test bolt; 6. and adjusting the gasket.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It is noted that relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" or the like is not excluded from a process, method, or the like that includes the element.
In the description of the present invention, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the term "provided" may be interpreted broadly, and for example, an object "provided" may be a part of a body, may be separately disposed from the body, and may be connected to the body, where the connection may be a detachable connection or an undetachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
The present invention is described in further detail below with reference to examples.
The invention provides a concrete embodiment 1 of a locking test fixture for an ear-free supporting plate self-locking nut, which comprises the following steps:
The lug-free supporting plate self-locking nut locking test fixture in the embodiment is used for clamping the self-locking nut 4 during locking test. The self-locking nut comprises an expanding head 41, a rivet deformation part 42 and a threaded connection part 43, and the structural design of the self-locking nut realizes the combination of the rivet nut and the self-locking nut and has the riveting function and the self-locking performance. The expansion head 41 adopts an ellipse-like structure, and provides anti-torsion moment in the process of installing and dismantling the bolt, so that the nut body is effectively prevented from rotating; the screwed connection part 43 is closed and locked to play a role in looseness prevention and vibration resistance.
As shown in fig. 1, the tool comprises a base 1, a base plate 2 in stop fit with the base 1 and a compression screw sleeve 3 in threaded connection with the base 1. The self-locking nut 4 is clamped by the backing plate 2 of the compression screw sleeve 3 in a matched mode, and the test bolt 5 penetrates through the compression screw sleeve 3 and is connected with the self-locking nut 4 in a threaded mode. An adjusting washer 6 is arranged between the bolt head of the test bolt 5 and the compression screw sleeve 3, the number of the adjusting washers 6 can be increased or decreased according to the length of the test bolt 5, and the adjusting washers 6 with different thicknesses can be replaced to control the screwing depth of the test bolt 5.
As shown in fig. 1 and 2, the outer peripheral surface of the base 1 is a hexagonal prism surface, a base hole 11 is formed in the base 1, the base hole 11 is a step hole, the step hole comprises a threaded section 111, a base plate positioning section 112 and an avoidance section 113, the base plate positioning section 112 is located between the threaded section 111 and the avoidance section 113, the inner diameter of the threaded section 111 is larger than the aperture of the base plate positioning section 112, and the aperture of the base plate positioning section 112 is larger than the inner diameter of the avoidance section 113. The inner diameter of the threaded section 111 is larger than that of the backing plate positioning section 112, so that the backing plate 2 and the threaded section 111 can be prevented from interfering with each other during assembly.
The inner wall surface of the backing plate positioning section 112 is matched with the outer peripheral surface of the backing plate 2 in a positioning manner, so that the base 1 can circumferentially position the backing plate 2, the position of the backing plate 2 is not easy to shake, and the mounting efficiency of a test is improved. The thread section 111 is in threaded connection with the compression screw sleeve 3, the self-locking nut 4 is clamped between the backing plate 2 and the compression screw sleeve 3, after the self-locking nut 4 is clamped, the thread section 111 of the self-locking nut 4 penetrates through the backing plate 2 and stretches into the avoidance section 113, and the test bolt 5 also stretches into the avoidance section 113 after penetrating through the self-locking nut 4. The inner diameter of the avoiding section 113 is larger than the outer diameter of the threaded section 111 of the self-locking nut 4, so that the deformation of the self-locking nut 4 is not influenced, and the locking moment of the self-locking nut 4 measured in a locking test is more accurate.
As shown in fig. 3 and 4, the backing plate 2 is a circular plate, and a backing plate hole 21 through which the self-locking nut 4 passes is provided. The cushion hole 21 is a counter bore, and the counter bore is matched with the self-locking nut 4 for processing and forming. The spacer hole 21 includes an enlarged head positioning section 211 adapted in shape to the enlarged head 41 of the self-locking nut 4 and a deformation positioning section 212 in positioning engagement with the rivet deformation portion 42 of the self-locking nut 4. Through the positioning action of the cushion holes 21 on the self-locking nuts 4, the self-locking nuts 4 are not easy to shake after being clamped by the cushion plates 2 and the compression screw sleeves 3, the clamping requirements of the self-locking nuts 4 can be met, and the testing machine can drive the self-locking nuts 4 and the test bolts 5 to rotate relatively after clamping the base 1.
In this embodiment, after the positioning of the self-locking nut 4 in the counter bore is completed, the protruding amount of the end face of the expansion head is 0.05-0.10mm, so as to ensure that the expansion head 41 of the self-locking nut 4 is tightly combined with the pad hole 21 after the installation is completed.
As shown in fig. 5, the compression screw sleeve 3 comprises a threaded connection section 31 connected with the base hole 11 and a screwing section 32, a screw sleeve hole 33 is formed in the compression screw sleeve, and the screwing section 32 is positioned outside the base hole 11, so that the operation of the compression screw sleeve 3 is facilitated. In this embodiment, the outer diameter of the threaded connection section 31 is larger than the maximum outer diameter of the screwing section 32, so that a larger force is applied between the threaded connection section 31 and the base 1, and the loosening is not easy.
When in use, as shown in figure 1, the base plate 2 is firstly put into the base 1 to form stop fit; then the self-locking nut 4 passes through the pad hole 21, and the angle of the self-locking nut 4 is adjusted to enable the expansion head of the self-locking nut to be tightly matched with the pad hole 21; and then screwing the compression screw sleeve 3 into the base 1, wherein the self-locking nut 4 is prevented from deflecting when screwing in until the compression screw sleeve 3 contacts with the end face of the backing plate 2, a certain moment is applied by using a spanner, so that the compression screw sleeve 3 compresses the end face of the self-locking nut 4, the backing plate 2 and the self-locking nut 4 are fixed, and the locking tool is assembled. The test bolt 5 passes through the adjusting washer 6 and is screwed into the self-locking nut 4, and then the whole set of tool is clamped on the testing machine, so that the locking test can be performed. After the test is finished, the test bolt 5 is screwed out, the compression screw sleeve 3 is disassembled by using a wrench, and the self-locking nut 4 is taken out. In this embodiment, when the self-locking nut 4 performs a locking test, the axis extends horizontally, and two jaws of the testing machine are horizontally spaced apart, one of the two jaws clamps the bolt head of the test bolt 5, and the other clamps the base 1.
According to the invention, the self-locking nut 4 is fixed by the threaded fit of the compression screw sleeve 3 and the base 1 instead of a plurality of bolts or riveting modes in the prior art, so that the self-locking nut is convenient to assemble and disassemble and can be reused. The design effectively simplifies the locking test, shortens the test period, avoids the waste use of the sandwich plate during riveting, and reduces the test tooling cost.
The concrete embodiment 2 of the invention has the advantages that the special embodiment 2 is different from the special embodiment only in that the compression screw sleeve hole is a counter bore and is used for positioning and matching with the outer wall surface of the self-locking nut, and the backing plate hole is used for the threaded connection of the test bolt and the self-locking nut after passing through.
The concrete embodiment 3 of the invention of the locking test fixture of the lug-free supporting plate self-locking nut is different from the above embodiment in that the base plate is of a boss structure and is provided with through holes, the protruding part of the through holes of the base plate are matched with the expanding head of the self-locking nut in a positioning way, and the other part of the through holes are matched with the rivet deformation part of the self-locking nut in a positioning way; the compressing screw sleeve hole is a step hole, and the large-aperture part of the step hole is matched with the boss part of the base plate so as to compress the end face of the expanding head of the self-locking nut.
The concrete embodiment 4 of the invention has the advantages that the special embodiment 4 is different from the special embodiment only in that the base hole is internally provided with the base plate stop surface which is in axial stop fit with the base plate along the base hole, and the automatic positioning of the position of the base plate can be realized in the process of screwing the test bolt into the self-locking nut after passing through the compression screw sleeve.
The concrete embodiment 5 of the invention of the locking test fixture of the lug-free supporting plate self-locking nut is different from the above embodiment in that the base of the base hole is a blind hole with an opening at the right end and a closed left end; the backing plate thickness is enough to hold self-locking nut and screw in self-locking nut's test bolt, and the backing plate hole is the shoulder hole, including expanding first location section, deformation location section and dodge the section, dodge section aperture and be greater than self-locking nut threaded connection part's external diameter. When the tool is used, the threaded connection part and the part of the test bolt penetrating out of the nut are located at the avoiding section, and the compression screw sleeve compresses the backing plate on the bottom of the blind hole on the base.
The specific embodiment 6 of the ear-free supporting plate self-locking nut locking test tool is different from the above embodiment only in that the tightening section of the compression screw sleeve can partially extend into the base hole.
The concrete embodiment 7 of the invention has the advantages that the difference from the above embodiment is that the outer diameter of the tightening section of the compression screw sleeve is the same as that of the threaded connection section, the length of the threaded section is enough, and the tightening section is not blocked in the base hole during use.
The specific embodiment 8 of the lug-free supporting plate self-locking nut locking test tool disclosed by the invention is different from the embodiment only in that the outer peripheral surface of the base is a non-hexagonal prismatic surface, such as: the four prismatic surfaces, the three prismatic surfaces and the like can meet the clamping requirement of the testing machine.
The concrete embodiment 9 of the lug-free supporting plate self-locking nut locking test fixture is different from the above embodiment only in that the test bolt directly passes through the compression screw sleeve and is screwed into the self-locking nut threaded connection section, and the fixture does not need to be provided with an adjusting washer at the moment.
The concrete embodiment 10 of the invention has the advantages that the aperture of the threaded sleeve hole is larger than that of the backing plate hole, and the test bolt passes through the threaded sleeve hole.
In other embodiments, the gasket hole is shaped according to the profile of the self-locking nut, and the shape of the counterbore may be non-elliptical, such as: the shape of the strip is matched with the self-locking nut.
It should be noted that the above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, but may be modified without inventive effort or equivalent substitution of some technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Ear-free supporting plate self-locking nut locking test fixture, its characterized in that includes:
A base (1) for clamping by a torque testing machine and provided with a base hole (11);
the base plate (2) is arranged in the base hole (11) and is in stop fit with the base (1) along the axial direction of the base hole (11), and a base plate hole (21) is formed in the base plate (2);
The compression screw sleeve (3) is in threaded connection with the base hole (11), and the compression screw sleeve (3) is used for being screwed into the base hole (11) to be matched with the base plate (2) to compress the expansion head (41) of the self-locking nut (4) along the axial direction of the base hole (11);
One of the screw sleeve hole (33) and the backing plate hole (21) of the compression screw sleeve (3) is used for being matched with the outer wall surface of the self-locking nut (4) in a positioning way, and the other one of the screw sleeve hole and the backing plate hole is used for being connected with the self-locking nut (4) in a threaded way after the test bolt (5) passes through.
2. The tool for locking the lug-free supporting plate self-locking nut according to claim 1, wherein the backing plate hole (21) is a counter bore for the self-locking nut (4) to pass through, and the counter bore comprises an expanding head positioning section (211) which is matched with the expanding head of the self-locking nut (4) in shape and a deformation positioning section (212) which is matched with the rivet deformation part of the self-locking nut (4) in a positioning way.
3. The tool for locking and testing the lug-free supporting plate self-locking nut according to claim 1 or 2, wherein a supporting plate peripheral locating surface matched with the supporting plate (2) in a locating way and a supporting plate blocking surface matched with the supporting plate (2) in an axial blocking way along the supporting plate hole (11) are arranged in the supporting plate hole (11).
4. The tool for locking and testing the lug-free supporting plate self-locking nut according to claim 3, wherein the base hole (11) is a step hole, the base hole (11) comprises a threaded section (111), a base plate positioning section (112) and an avoidance section (113), the inner peripheral surface of the base plate positioning section (112) forms the peripheral positioning surface of the base plate (2), the avoidance section (113) is used for the self-locking nut (4) and the test bolt (5) to extend in, the threaded section (111) is in threaded connection with the compression screw sleeve (3), the inner diameter of the threaded section (111) is larger than the inner diameter of the base plate positioning section (112), and the inner diameter of the base plate positioning section (112) is larger than the inner diameter of the avoidance section (113).
5. The tool for locking the lug-less supporting plate self-locking nut according to claim 1 or 2, wherein the compression screw sleeve (3) comprises a threaded connection section (31) and a screwing section (32), the threaded connection section (31) is in threaded connection with the base hole (11), and the screwing section (32) is positioned outside the base hole (11) for operating the compression screw sleeve (3) to be screwed into the base hole (11).
6. The tool for locking and testing the lug-less pallet self-locking nut according to claim 5, wherein the maximum outer diameter of the screwing section (32) is smaller than the outer diameter of the threaded connecting section (31).
7. The tool for locking and testing the lug-free supporting plate self-locking nut according to claim 1 or 2, wherein the outer peripheral surface of the base (1) is a polygonal surface.
8. The tool for locking and testing the lug-less supporting plate self-locking nut according to claim 1 or 2, further comprising an adjusting washer (6) which is sleeved on the test bolt (5) and clamped between the compression screw sleeve (3) and the test bolt (5).
9. The tool for locking and testing the lug-free supporting plate self-locking nut according to claim 1 or 2, wherein the base hole (11) is a through hole.
10. The tool for locking and testing the lug-free supporting plate self-locking nut according to claim 1 or 2, wherein the aperture of the threaded sleeve hole (33) is equal to the aperture of the backing plate hole (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111172170.4A CN113916520B (en) | 2021-10-08 | 2021-10-08 | Locking test tool for lug-free supporting plate self-locking nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111172170.4A CN113916520B (en) | 2021-10-08 | 2021-10-08 | Locking test tool for lug-free supporting plate self-locking nut |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113916520A CN113916520A (en) | 2022-01-11 |
| CN113916520B true CN113916520B (en) | 2024-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111172170.4A Active CN113916520B (en) | 2021-10-08 | 2021-10-08 | Locking test tool for lug-free supporting plate self-locking nut |
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| CN (1) | CN113916520B (en) |
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| CN113916520A (en) | 2022-01-11 |
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