CN113916520A - Ear-free supporting plate self-locking nut locking test tool - Google Patents
Ear-free supporting plate self-locking nut locking test tool Download PDFInfo
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- CN113916520A CN113916520A CN202111172170.4A CN202111172170A CN113916520A CN 113916520 A CN113916520 A CN 113916520A CN 202111172170 A CN202111172170 A CN 202111172170A CN 113916520 A CN113916520 A CN 113916520A
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- 230000000149 penetrating effect Effects 0.000 claims description 5
- 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 15
- 230000008569 process Effects 0.000 description 10
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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 lug-free supporting plate self-locking nut locking test tool. The tool comprises a base, a base plate and a pressing threaded sleeve; a counter bore matched with the appearance of the self-locking nut to be tested is arranged on the base plate; the base is provided with a step-shaped base hole which can form stop matching with the base plate, so that the base plate is clamped into the base; the pressing threaded sleeve is provided with a wrenching section and a threaded connection section, can be screwed into the base, and is also provided with a pressing threaded sleeve hole for the test bolt to pass through. According to the invention, the self-locking nut is clamped through the base plate and the compression screw sleeve, so that damage to the nut caused by direct clamping is avoided, and waste of test tools caused by fixing the self-locking nut in a riveting mode is also avoided; the self-locking nut is fixed in two modes of stop matching of the base and the base plate and threaded connection of the base and the pressing threaded sleeve, other fasteners are not needed, the tool is convenient and rapid to assemble and disassemble, 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 lug-free supporting plate self-locking nut locking test tool.
Background
As a novel fastener, the earless supporting plate self-locking nut comprises an expansion head, a rivet pulling deformation part and a threaded connection part, the structural design of the earless supporting plate self-locking nut realizes the combination of the rivet nut and the self-locking nut, and the earless supporting plate self-locking nut has the riveting function and the self-locking performance. The expansion head adopts an ellipse-like structure, so that anti-torsion torque is provided in the process of installing and disassembling the bolt, and the nut body is effectively prevented from rotating; the screw thread connecting part is closed and locked, and plays the functions of looseness prevention and vibration resistance. The installation process of the earless supporting plate self-locking nut does not need to be provided with a rivet hole, thereby reducing the fatigue source of the structure, prolonging the service life of the structure and simultaneously reducing the total weight of the structure. The nut is widely used on foreign airplanes at present, and replaces the traditional supporting plate nut which is fixedly connected with a structure through drilling riveting.
The nut closing technology is a method of changing the shape of the nut closing area through a machining method, so that the nut and a bolt form interference fit. In the use, produce certain friction torque on the contact surface of nut and bolt, prevent to become flexible, realize the auto-lock. Therefore, the locking torque is an important assessment index of the self-locking nut.
When the locking test is carried out, the self-locking nut needs to be fixed, then the test bolt is screwed in and screwed out of the self-locking nut through the testing machine, and the locking torque of the self-locking nut is obtained by measuring in the screwing-in and screwing-out process. The self-locking nut is a thin-wall part, is special in head shape and limited by a product structure, and cannot be directly clamped on the outer circle and the head of the self-locking nut, the self-locking nut needs to be riveted on the sandwich plate for testing, and the sandwich plate and the self-locking nut are discarded after the test is finished. The whole test process is long in period and complex in operation, test tools such as the sandwich plate cannot be used repeatedly, and the test cost is high.
Chinese patent No. CN210834153U discloses a locking test device for self-locking nut of earless supporting plate. The device comprises a testing device bottom plate, a testing device cover plate and a locking testing core rod. When the self-locking nut is used, the self-locking nut is fixed through the testing device bottom plate and the testing device cover plate, and then the 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, so that the bolts need to be screwed and withdrawn repeatedly during the test, the process is complicated, and the test efficiency is low.
Disclosure of Invention
The invention aims to provide a self-locking nut locking test tool without an ear supporting plate, which is used for solving the technical problem of low self-locking nut test efficiency in the current self-locking nut locking test.
The lug-free supporting plate self-locking nut locking test tool adopts the following technical scheme:
the no ear layer board self-locking nut locking test frock includes:
the base is used for clamping 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 in a stop manner along the axial direction of the base hole, and a base plate hole is formed in the base plate;
the pressing screw sleeve is in threaded connection with the threaded hole of the base and is screwed into the base hole to be matched with the base plate to press the expansion head of the self-locking nut along the axial direction of the base hole;
the compression screw sleeve is provided with a compression screw sleeve hole, one of the compression screw sleeve hole and the gasket hole is used for being matched with the outer wall surface of the self-locking nut in a positioning mode, and the other is used for connecting the test bolt with the self-locking nut after penetrating through.
Has the advantages that: the self-locking nut locking test tool clamps the self-locking nut through the compression threaded sleeve and the base plate, and the compression threaded 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, the self-locking nut is prevented from being directly clamped, and the self-locking nut is effectively protected.
Further, the base hole is a stepped hole, and is provided with a backing plate periphery positioning surface in positioning fit with the backing plate periphery surface and a backing plate blocking surface in blocking fit with the backing plate along the axial direction of the base hole. The base hole is set to be the step hole, positioning and stopping of the base plate are achieved, the base plate is not prone to shaking, and assembly is simple and reliable.
Further, the base hole includes screw thread section, backing plate location section and dodges the section, and the inner peripheral surface of backing plate location section forms backing plate periphery locating surface dodges the section and supplies self-locking nut and test bolt to stretch into, and the screw thread section is used for and compresses tightly swivel nut threaded connection, and the internal diameter of screw thread section is greater than the internal diameter of backing plate location section, and the internal diameter of backing plate location section is greater than the internal diameter of dodging the section. The internal diameter difference of the threaded section and the positioning end section of the base plate avoids mutual interference of the base plate and the threaded section, and the base plate is convenient to load and take out.
Furthermore, 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 shape of the self-locking nut and a deformation part positioning section matched with the rivet pulling deformation part of the self-locking nut in a positioning mode. The backing plate hole sets up to the counter bore and can fix a position the head that enlarges, and the twist of the swivel nut of being convenient for compress tightly makes things convenient for the assembly.
Furthermore, the pressing threaded sleeve comprises a threaded connection section and a screwing section, a threaded sleeve hole is formed in the pressing threaded 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 pressing threaded sleeve to be screwed into the base hole. The screwing section of the pressing screw sleeve is positioned outside the base hole, so that the pressing screw sleeve can be conveniently screwed in and out.
Furthermore, the maximum outer diameter of the wrenching section is smaller than the outer diameter of the threaded connection section. The larger external diameter of the threaded connection section enables a larger acting force to be generated between the threaded connection section and the base, so that the threaded connection section is not easy to loosen.
Further, the outer peripheral surface of the base is a polyhedral surface, so that the testing machine can be clamped conveniently.
Furthermore, the ear-free supporting plate self-locking nut locking test tool further comprises an adjusting washer which is sleeved on the test bolt and clamped between the pressing threaded sleeve and the test bolt. The arrangement of the adjusting washer can control the screwing depth of the test bolt.
Furthermore, the base hole is a through hole, so that the base is simpler to process.
Furthermore, the diameter of the screw sleeve hole is equal to that of the gasket plate hole.
Drawings
FIG. 1 is an assembly view of a locking tool in a working state of a specific embodiment 1 of a self-locking nut locking test tool for a earless supporting plate according to the present invention;
FIG. 2 is a schematic structural diagram of a base in embodiment 1 of the lug-free supporting plate self-locking nut locking test fixture of the present invention;
fig. 3 and 4 are schematic structural views of a backing plate in a specific embodiment 1 of the lug-free supporting plate self-locking nut locking test tool of the invention;
FIG. 5 is a schematic structural view of a compression screw sleeve in the specific embodiment 1 of the lug-free supporting plate self-locking nut locking test tool of the present invention;
in the figure: 1. a base; 11. a base hole; 111. a threaded segment; 112. a backing plate positioning section; 113. an avoidance section; 2. a base plate; 21. a gasket hole; 211. an expansion head positioning section; 212. a deformation positioning section; 3. pressing the threaded sleeve; 31. a threaded connection section; 32. pulling and screwing sections; 33. a screw sleeve hole; 4. a self-locking nut; 41. expanding the head; 42. a rivet deformed portion; 43. a threaded connection portion; 5. testing the bolt; 6. and adjusting the gasket.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of 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 present invention, 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 derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, which may be present, 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. Also, 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, elements recited by the phrases "comprising an … …," or the like, do not exclude the presence of such elements, processes, or methods.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
The invention provides a specific embodiment 1 of a lug-free supporting plate self-locking nut locking test tool:
the lug-free supporting plate self-locking nut locking test tool in the embodiment is used for clamping the self-locking nut 4 during a locking test. The self-locking nut comprises an expanding head 41, a pulling rivet deformation part 42 and a threaded connection part 43, the structural design of the self-locking nut realizes the combination of the riveting nut and the self-locking nut, and the self-locking nut has the riveting function and the self-locking performance. The expansion head 41 adopts an ellipse-like structure, provides anti-torsion moment in the process of installing and disassembling the bolt, and effectively prevents the nut body from rotating; the screw thread connecting part 43 is closed and locked, and plays roles of looseness prevention and vibration resistance.
As shown in fig. 1, the tool includes a base 1, a backing plate 2 in stop fit with the base 1, and a pressing threaded sleeve 3 in threaded connection with the base 1. The pressing threaded sleeve 3 is provided with a backing plate 2 which is matched with and clamps the self-locking nut 4, and the test bolt 5 penetrates through the pressing threaded sleeve 3 and then is in threaded connection with the self-locking nut 4. 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, the base 1 is provided with a base hole 11, the base hole 11 is a stepped hole and comprises a threaded section 111, a cushion plate positioning section 112 and an avoiding section 113, the cushion plate positioning section 112 is located between the threaded section 111 and the avoiding section 113, the inner diameter of the threaded section 111 is larger than that of the cushion plate positioning section 112, and the inner diameter of the cushion plate positioning section 112 is larger than that of the avoiding section 113. The internal diameter of the threaded section 111 is greater than the internal diameter of the shim plate retaining section 112 to avoid interference between the shim plate 2 and the threaded section 111 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 test installation efficiency is improved. The threaded section 111 is in threaded connection with the compression threaded sleeve 3, the self-locking nut 4 is clamped between the backing plate 2 and the compression threaded sleeve 3, after the self-locking nut 4 is clamped, the threaded section 111 of the self-locking nut 4 penetrates through the backing plate 2 and extends into the avoidance section 113, and the test bolt 5 also extends 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 thread 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 the locking test is more accurate.
As shown in fig. 3 and 4, the backing plate 2 is a circular plate on which a backing plate hole 21 through which the self-locking nut 4 passes is provided. The gasket hole 21 is a counter bore, and the counter bore is matched with the self-locking nut 4 for processing and forming. The gasket hole 21 comprises an expanding head positioning section 211 matched with the expanding head 41 of the self-locking nut 4 in shape and a deformation positioning section 212 matched with the rivet pulling deformation part 42 of the self-locking nut 4 in positioning. Through the positioning action of the backing plate hole 21 on the self-locking nut 4, the self-locking nut 4 is not easy to shake after being clamped by the backing plate 2 and the compression screw sleeve 3, the clamping requirement of the self-locking nut 4 can be met, and the testing machine can drive the self-locking nut 4 and the testing bolt 5 to rotate relatively after clamping the base 1.
In the embodiment, after the self-locking nut 4 is positioned in the counter bore, the protruding amount of the end face of the expansion head is 0.05-0.10mm, so that the expansion head 41 of the self-locking nut 4 is tightly combined with the gasket hole 21 after the self-locking nut is installed.
As shown in fig. 5, the pressing screw sleeve 3 includes a threaded connection section 31 and a screwing section 32 connected to the base hole 11, and a screw sleeve hole 33 is formed in the threaded connection section, and the screwing section 32 is located outside the base hole 11, so that the pressing screw sleeve 3 can be conveniently operated. 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 large acting force is generated between the threaded connection section 31 and the base 1, and the threaded connection section is not easy to loosen.
When in use, as shown in fig. 1, the backing plate 2 is firstly placed into the base 1 to form stop matching; then the self-locking nut 4 passes through the gasket hole 21, and the angle of the self-locking nut 4 is adjusted to enable the expansion head to be tightly matched with the gasket hole 21; then will compress tightly in the swivel nut 3 screw in base 1, should pay attention to when screwing in and prevent that self-locking nut 4 from taking place to deflect, until compressing tightly the end face contact of swivel nut 3 with backing plate 2, use the spanner to apply certain moment for compressing tightly the end face of swivel nut 4 for 3 compresses tightly the end face of self-locking nut 4 of swivel nut, accomplish backing plate 2 and self-locking nut 4 fixed, the locking frock equipment is accomplished. And (3) passing the test bolt 5 through the adjusting washer 6, screwing the test bolt into the self-locking nut 4, and clamping the whole set of tool on a testing machine to perform a locking test. After the test is finished, the test bolt 5 is screwed out, the pressing threaded sleeve 3 is disassembled by using a spanner, and the self-locking nut 4 is taken out. In the embodiment, when the self-locking nut 4 is used for a locking test, the axis extends horizontally, two clamping jaws of the testing machine are horizontally spaced, one of the two clamping jaws clamps the bolt head of the test bolt 5, and the other clamping jaw clamps the base 1.
According to the invention, the self-locking nut 4 is fixed by using a plurality of bolts or riveting in the prior art through the threaded fit of the pressing threaded sleeve 3 and the base 1, so that the assembly and disassembly are convenient, and the device can be used repeatedly. The design effectively simplifies the locking test, shortens the test period, avoids the waste of the sandwich plate during riveting and reduces the cost of the test tool.
The specific embodiment 2 of the lug-free supporting plate self-locking nut locking test tool is different from the above embodiments only in that a compression screw sleeve hole is a counter bore, the compression screw sleeve hole is used for being matched with the outer wall surface of the self-locking nut in a positioning mode, and a backing plate hole is used for enabling a test bolt to pass through and then to be in threaded connection with the self-locking nut.
The specific embodiment 3 of the lug-free supporting plate self-locking nut locking test tool is different from the above embodiments in that the base plate is of a boss structure and is provided with a through hole, the through hole of the protruding part of the base plate is in positioning fit with the expansion head of the self-locking nut, and the through holes of the rest part are in positioning fit with the rivet deformation part of the self-locking nut; the compression screw sleeve hole is a stepped hole, and the large hole diameter part of the stepped hole is matched with the boss part of the backing plate so as to compress the end face of the expansion head of the self-locking nut.
The specific embodiment 4 of the lug-free supporting plate self-locking nut locking test tool is different from the above embodiments only in that only the base plate stop surface matched with the base plate along the axial stop of the base hole is arranged in the base hole, and the test bolt can realize the automatic positioning of the position of the base plate in the process of penetrating through the pressing threaded sleeve and then screwing into the self-locking nut.
The invention has no specific embodiment 5 of the self-locking nut locking test fixture of the ear supporting plate, the difference with the above embodiment is that the base of the base hole is a blind hole with the right end opened and the left end closed; the backing plate thickness is enough to hold self-locking nut and the test bolt of screw in self-locking nut, and the backing plate hole is the shoulder hole, including expanding first location section, deformation location section and dodging the section, dodges the external diameter that the section aperture is greater than self-locking nut threaded connection portion. When the tool is used, the threaded connection part and the part of the test bolt penetrating out of the nut are located in the avoidance section, and the pressing threaded sleeve presses the base plate to the bottom of the blind hole in the base.
The specific embodiment 6 of the lug-free supporting plate self-locking nut locking test tool is only different from the above embodiments in that the pressing threaded sleeve wrenching section can partially extend into the base hole.
The specific embodiment 7 of the lug-free supporting plate self-locking nut locking test tool is different from the above embodiments only in that the outer diameters of the pressing threaded sleeve screwing section and the threaded connection section are the same, the length of the threaded section is enough, and the screwing section cannot be clamped in a base hole when the tool is used.
The specific embodiment 8 of the ear-free supporting plate self-locking nut locking test tool is different from the above embodiments only in that the outer peripheral surface of the base is a non-hexagonal prism surface, such as: quadrangular prism surface, triangular prism surface, etc. as long as the clamping requirement of the testing machine is met.
The specific embodiment 9 of the lug-free supporting plate self-locking nut locking test tool is only different from the above embodiments in that a test bolt directly penetrates through a pressing threaded sleeve and is screwed into a self-locking nut threaded connection section, and an adjusting washer is not required to be arranged on the tool at the moment.
The specific embodiment 10 of the lug-free supporting plate self-locking nut locking test tool is only different from the above embodiments in that the aperture of the thread sleeve hole is larger than that of the backing plate hole, and a test bolt passes through the thread sleeve hole.
In other embodiments, the gasket hole is formed according to the shape of the self-locking nut, and the shape of the counter bore may be non-oval, such as: the shape of the strip can be matched with that of the self-locking nut.
Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement 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 tool, which is characterized by comprising:
the base (1) is used for clamping the torque testing machine and is 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 pressing threaded sleeve (3) is in threaded connection with the base hole (11), and the pressing threaded sleeve (3) is screwed into the base hole (11) to be matched with the cushion plate (2) to press the expansion head (41) of the self-locking nut (4) along the axial direction of the base hole (11);
one of a screw sleeve hole (33) of the pressing screw sleeve (3) and the backing plate hole (21) is used for being matched with the outer wall surface of the self-locking nut (4) in a positioning mode, and the other is used for connecting the test bolt (5) with the self-locking nut (4) in a threaded mode after penetrating through.
2. The earless supporting plate self-locking nut locking test tool according to claim 1, wherein the supporting plate hole (21) is a counter bore for the self-locking nut (4) to pass through, and the counter bore comprises an expanded head positioning section (211) matched with the expanded head shape of the self-locking nut (4) and a deformation positioning section (212) matched with the rivet pulling deformation part of the self-locking nut (4) in a positioning mode.
3. The earless supporting plate self-locking nut locking test tool according to claim 1 or 2, wherein a supporting plate peripheral positioning surface in positioning fit with the peripheral surface of the supporting plate (2) and a supporting plate blocking surface in axial blocking fit with the supporting plate (2) along the base hole (11) are arranged in the base hole (11).
4. The earless supporting plate self-locking nut locking test tool according to claim 3, wherein the base hole (11) is a stepped hole, the base hole (11) comprises a threaded section (111), a supporting plate positioning section (112) and an avoiding section (113), the inner peripheral surface of the supporting plate positioning section (112) forms an outer peripheral positioning surface of the supporting plate (2), the avoiding section (113) is used for the self-locking nut (4) and the test bolt (5) to extend into, the threaded section (111) is used for being in threaded connection with the pressing threaded sleeve (3), the inner diameter of the threaded section (111) is larger than that of the supporting plate positioning section (112), and the inner diameter of the supporting plate positioning section (112) is larger than that of the avoiding section (113).
5. The earless supporting plate self-locking nut locking test tool 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 located outside the base hole (11) and is used for operating the compression screw sleeve (3) to screw into the base hole (11).
6. The earless supporting plate self-locking nut locking test tool according to claim 5, wherein the maximum outer diameter of the wrenching section (32) is smaller than the outer diameter of the threaded connection section (31).
7. The earless supporting plate self-locking nut locking test tool according to claim 1 or 2, wherein the outer peripheral surface of the base (1) is a polygonal surface.
8. The earless supporting plate self-locking nut locking test tool according to claim 1 or 2, further comprising an adjusting washer (6) which is sleeved on the test bolt (5) and clamped between the pressing threaded sleeve (3) and the test bolt (5).
9. The earless supporting plate self-locking nut locking test tool according to claim 1 or 2, wherein the base hole (11) is a through hole.
10. The earless supporting plate self-locking nut locking test tool according to claim 1 or 2, wherein the aperture of the screw sleeve hole (33) is equal to that of the supporting 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 true CN113916520A (en) | 2022-01-11 |
| CN113916520B CN113916520B (en) | 2024-05-17 |
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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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2021
- 2021-10-08 CN CN202111172170.4A patent/CN113916520B/en active Active
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