A device for testing the spring properties of a spring washer

Abstract

The application discloses a kind of spring washer elastic performance testing device, belong to spring washer elastic performance testing technical field;Solve the elastic performance testing device of existing spring washer needs additional reliance electronic universal testing machine and other large equipment, the space of test site and the high requirement of related hardware matching, and the problem of complicated operation, low efficiency in test process.The testing device of the application includes fixed base, pressure measurement and pressure display component, step stud, pre-tightening force applying component, pre-tightening force conducting component;The lower end of step stud is fixed on fixed base, and step stud is sequentially penetrated by pre-tightening force applying component, spring washer, pre-tightening force conducting component and pressure measurement and pressure display component from top to bottom.The testing device of the application is simple in structure, low in preparation cost and can load and unload multiple spring washers at a time under specified load, with high testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of spring washer elasticity testing devices, and more particularly to a testing device for the elastic performance of spring washers. Background Technology

[0002] According to national standards, spring washers need to undergo elasticity performance testing. The test method requires that a load of the corresponding specification be applied three times consecutively for spring washers of different specifications, and then the free height be measured. The free height after the test should not be less than 1.67 times the nominal S.

[0003] Traditional testing methods utilize large equipment such as universal testing machines. The spring washer is placed in the center of a pressure plate, and the machine is started. The crossbeam displacement applies a fixed load to the spring washer three times consecutively, followed by unloading. The free height is then measured using a height gauge. This process requires additional large equipment, demanding significant space and hardware support. Furthermore, the process necessitates loading the spring washer three times individually, making it cumbersome and inefficient. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a testing device for the elastic properties of spring washers, in order to solve the problems of existing spring washer elastic property testing devices requiring additional large equipment such as electronic universal testing machines, high requirements for test site space and related hardware, and cumbersome and inefficient test process.

[0005] The objective of this invention is mainly achieved through the following technical solutions:

[0006] This invention provides a testing device for the elastic properties of spring washers, including a fixed base, a pressure measuring and display component, a stepped stud, a preload application component, and a preload transmission component;

[0007] The lower end of the stepped stud is fixed to the fixed base. The stepped stud passes through the preload application component, spring washer, preload transmission component and pressure measurement and display component from top to bottom.

[0008] The preload application component is used to apply preload to the spring washer, the preload transmission component is used to transmit the preload, and the pressure measurement and display component is used to sense and display the preload of the spring washer during loading and unloading.

[0009] In one possible design, the preload transmission assembly includes a transmission washer and a force-applying sleeve, with the transmission washer positioned below the spring washer and above the force-applying sleeve.

[0010] In one possible design, the preload application component includes a preload nut;

[0011] The preload nut, the conductive washer, and the force-applying sleeve are all provided with a center hole, and the stepped stud passes through the center holes of the preload nut, the conductive washer, and the force-applying sleeve in sequence.

[0012] In one possible design, the pressure measurement and display assembly includes a ring pressure sensor and a force display; the force display is connected to the ring pressure sensor via wires.

[0013] In one possible design, the top of the fixed base is provided with a recessed annular step, the annular step being concentric with the fixed base; the annular pressure sensor is disposed on the annular step, and the outer diameter of the annular pressure sensor matches the outer diameter of the annular step.

[0014] In one possible design, the upper end face of the annular pressure sensor is provided with a protruding annular platform, and the lower end face of the force-applying sleeve is provided on the protruding annular platform.

[0015] In one possible design, the stepped stud includes a first-order stud and a fixed section; the first-order stud includes an external thread section and a smooth cylindrical section from top to bottom;

[0016] The external thread section is used to cooperate with the preload nut to apply axial preload to the spring washer on the smooth cylindrical section; the fixed section is embedded in the conductive washer and the force-applying sleeve and its bottom end is fixedly connected to the center hole of the fixed base.

[0017] In one possible design, a threaded hole is provided at the center of the fixed base, and the bottom end of the fixed section of the stepped stud is threadedly connected to the fixed base.

[0018] In one possible design, the device also includes washers; there are multiple spring washers between the preload nut and the conductive washer, and the multiple spring washers are separated from each other by washers.

[0019] In one possible design, the base has multiple through holes, and bolts are used to fix the base to the experimental platform through the through holes.

[0020] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0021] (1) This invention applies axial preload to the spring washer by setting a preload loading component, and transmits the preload to the pressure measuring and display component through a preload transmission component, so as to perform three consecutive loading and unloading of the fixed load on the spring washer. Compared with existing testing devices, this invention does not require large equipment such as electronic universal testing machines, and the requirements for related hardware are not high. In addition, both the preload application component and the preload transmission component are mounted on stepped studs, which is simple, stable and reliable, and occupies little space.

[0022] (2) By setting a preload nut, a transmission washer and a force-applying sleeve, the present invention can apply an axial preload to the spring washer and transmit the axial preload to the pressure measuring and pressure display component, thereby accurately testing the elastic performance of the spring washer.

[0023] (3) The present invention can sense the axial preload during loading and unloading by setting an annular platform on the top surface of the annular pressure sensor.

[0024] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0025] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0026] Figure 1 This is a schematic diagram of the structure of the testing device for the elastic properties of the spring washer according to the present invention;

[0027] Figure 2 for Figure 1 Cross-sectional view along the AA direction;

[0028] Figure 3 This is a schematic diagram of the structure of the fixed base;

[0029] Figure 4 This is a schematic diagram of a stepped stud.

[0030] Figure label:

[0031] 1-Fixed base; 2-Annular pressure sensor; 3-Stepped stud; 4-Force application sleeve; 5-Preload nut; 6-Conductive washer; 7-Force value display; 8-Washer; 9-Spring washer; 10-Wire; 11-First-order stud; 12-Second-order stud; 13-Third-order stud; 14-Fixed section. Detailed Implementation

[0032] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0033] The present invention provides a test device for the elastic performance of a spring washer 9, which device comprises a fixed base 1, a pressure measuring and pressure display component, a stepped stud 3, a pre-tightening force applying component, and a pre-tightening force conducting component; the lower end of the stepped stud 3 is fixed on the fixed base 1, and the stepped stud 3 sequentially penetrates through the pre-tightening force applying component, the spring washer 9, the pre-tightening force conducting component, and the pressure measuring and pressure display component from top to bottom; the pre-tightening force applying component is used for applying a pre-tightening force to the spring washer 9, the pre-tightening force conducting component is used for conducting the pre-tightening force to the pressure measuring and pressure display component, and the pressure measuring and pressure display component is used for sensing and displaying the pre-tightening force of the spring washer 9 during the loading and unloading processes.

[0034] Specifically, as Figure 1 and Figure 2 shown, the fixed base 1 of the present invention is arranged on a test platform, the pressure measuring and pressure display component of the present invention is arranged on the fixed base 1, the stepped stud penetrates through the pressure measuring and pressure display component in the vertical direction, a pre-tightening force conducting component is arranged above the pressure measuring and pressure display component, a spring washer 9 is arranged above the pre-tightening force conducting component, and the spring washer 9 is axially pre-tightened by the pre-tightening force applying component arranged above it.

[0035] The present invention applies an axial pre-tightening force to the spring washer 9 by setting a pre-tightening force loading component, and conducts the pre-tightening force to the pressure measuring and pressure display component through the pre-tightening force conducting component to perform three consecutive loadings and unloadings of the fixed load of the spring washer 9; compared with the existing test devices, the present invention does not need to rely on large-scale devices such as electronic universal testing machines, and at the same time, the requirements for the relevant hardware supporting facilities of the device are not high. In addition, both the pre-tightening force applying component and the pre-tightening force conducting component are sleeved on the stepped stud 3, with a simple and stable structure and small occupied space; it should also be noted that when testing the elastic performance of the spring washer 9, first turn on the power of the pressure measuring and pressure display component, then tighten the pre-tightening force applying component with a wrench, and at the same time observe the force value on the pressure measuring and pressure display component. When the display reaches the set load, stop tightening the pre-tightening force applying component, then loosen the pre-tightening force applying component, unload the spring washer 9 to make it reach the free state, and then tighten the pre-tightening force applying component again to make its pre-tightening force reach the set load. Stop tightening the pre-tightening force applying component again, repeat the loading and unloading process of the spring washer 9 3 times, then remove the pre-tightening force applying component, take out the tested spring washer 9, place it on the test platform, measure its free height with a height gauge, and according to the elastic test method standard regulations, if it is greater than or equal to 1.67 times of S nominal, it is qualified, and if it is less than 1.67 times of S nominal, it is unqualified. Thus, the elastic performance test of the spring washer 9 is completed.

[0036] In order to apply a preload to the spring washer 9 and transmit the preload to the pressure measuring and display assembly, the preload transmission assembly of the present invention includes a transmission washer 6 and a force-applying sleeve 4. The transmission washer 6 is located below the spring washer 9 and above the force-applying sleeve 4. The preload application assembly includes a preload nut 5. The preload nut 5, the transmission washer 6 and the force-applying sleeve 4 are all provided with a central hole, and a stepped stud passes through the central holes of the preload nut 5, the transmission washer 6 and the force-applying sleeve 4 in sequence.

[0037] Specifically, such as Figure 2 As shown, the preload application component of the present invention includes a preload nut 5, and the preload transmission component includes a transmission washer 6 and a force-applying sleeve 4. The preload nut 5, spring washer 9, transmission washer 6, and force-applying sleeve 4 are sequentially fitted onto the stepped stud through a central hole. By tightening the preload nut 5 with a wrench, an axial preload is applied to the spring washer 9 below it. The spring washer 9 compresses under the axial preload and transmits the preload to the transmission washer 6. The transmission washer 6 then transmits the preload to the force-applying sleeve 4 below it. Since the lower end face of the force-applying sleeve 4 is in contact with the pressure measuring and display component, when the pressure measuring and display component indicates that the applied preload has reached the set load, the tightening of the preload nut 5 is stopped, and the preload nut 5 is loosened. This loading and unloading process is repeated three times.

[0038] It should be noted that the force-applying sleeve 4 of the present invention is a hollow rotating body, and the central hole inside the force-applying sleeve 4 can ensure that the stepped stud 3 passes smoothly through the force-applying sleeve 4.

[0039] Compared with the prior art, the present invention, by setting a preload nut 5, a transmission washer 6 and a force-applying sleeve 4, can apply an axial preload to the spring washer 9 and transmit the axial preload to the pressure measuring and pressure display component, thus accurately testing the elastic performance of the spring washer 9.

[0040] It should also be noted that since the preload nut 5, spring washer 9, conductive washer 6, and force-applying sleeve 4 all pass through the stepped stud arranged in the vertical direction, the structure of the testing device of the present invention is relatively compact and its space requirements for the test site are relatively low. In addition, the operation of this testing device is relatively simple. Compared with the use of existing large equipment such as electronic universal testing machines, which not only occupy a large space but are also cumbersome to operate, the testing efficiency is inevitably low.

[0041] In order to accurately measure the elastic properties of the spring washer 9, the pressure measuring and pressure display assembly of the present invention includes an annular pressure sensor 2 and a force value display 7; the force value display 7 is connected to the annular pressure sensor 2 via a wire 10.

[0042] Specifically, the annular pressure sensor 2 of the present invention can be sleeved on a stepped stud, and an annular platform is provided on the top surface of the annular pressure sensor 2, the outer diameter of which is equal to the outer diameter of the force-applying sleeve 4. Compared with the prior art, the present invention utilizes a force value display 7 connected to the annular pressure sensor 2, which can display the axial preload transmitted by the force-applying sleeve 4 in real time, i.e., the preload borne by the spring washer 9. The pressure measurement and pressure display components of the spring washer 9 of the present invention are simple in composition and easy to operate.

[0043] It should be noted that the force value of the ring pressure sensor 2 needs to be zeroed before the test begins.

[0044] To more securely fix the annular pressure sensor 2, the top of the fixing base 1 of the present invention is provided with a recessed annular step, and the annular step is arranged concentrically with the fixing base 1; the annular pressure sensor 2 is disposed on the annular step, and the outer diameter of the annular pressure sensor 2 matches the outer diameter of the annular step.

[0045] Specifically, such as Figure 3 As shown, the top surface of the fixed base 1 is provided with a recessed annular step. The outer diameter of the annular step matches the outer diameter of the annular pressure sensor 2, so that the annular pressure sensor 2 is placed stably on the top surface of the fixed base 1. That is, the bottom part of the annular pressure sensor 2 is embedded in the annular step, thereby increasing its stability.

[0046] It should be noted that the height of the annular pressure sensor 2 is greater than the depth of the recessed annular step, so as to avoid the force-applying sleeve 4 from contacting the fixed base 1.

[0047] It should also be noted that the upper end face of the annular pressure sensor 2 is provided with a protruding annular platform, and the lower end face of the force-applying sleeve 4 is provided on the protruding annular platform.

[0048] Specifically, such as Figure 1 and Figure 2 As shown, the annular pressure sensor 2 of the present invention is circular, and the stepped stud 3 passes through the central hole in the middle of the annular force-applying sleeve 4. The protruding annular platform on the upper end face of the annular pressure sensor 2 contacts the lower end face of the force-applying sleeve 4, and the two are arranged concentrically.

[0049] Compared with the prior art, the present invention can sense the axial preload during loading and unloading by setting an annular platform on the top surface of the annular pressure sensor 2.

[0050] To achieve the locking of the stepped stud 3 and the preload nut 5, the stepped stud of the present invention includes a first-stage stud 11 and a fixed section 14. The first-stage stud 11 includes an external thread section and a smooth cylindrical section from top to bottom. The external thread section is used to cooperate with the preload nut 5 to apply an axial preload force to the spring washer 9 on the smooth cylindrical section. The fixed section 14 is embedded in the conductive washer 6 and the force-applying sleeve 4 and its bottom end is fixedly connected to the center hole of the fixed base.

[0051] Specifically, such as Figure 4 As shown, the stepped stud of the present invention comprises, from top to bottom, a first-stage stud 11 and a fixing section 14. The external threaded section of the first-stage stud 11 is used for threaded connection with the preload nut 5. The spring washer 9 is sleeved on the smooth cylindrical section, and the fixing section 14 is embedded in the conductive washer 6 and the force-applying sleeve 4. When a preload is required on the spring washer 9, the preload nut 5 is tightened with a wrench to tighten it to the stepped stud 3. At this time, the preload nut 5 applies an axial preload to the spring washer 9, the conductive washer 6, the force-applying sleeve 4, and the annular pressure sensor 2 until the force value display 7 reaches the set load. Then, the preload nut 5 is tightened in the opposite direction to unload the preload load applied to the spring washer 9.

[0052] It should be noted that the fixed base of the present invention has a threaded hole at the center, and the bottom end of the fixed section 14 of the stepped stud 3 is threadedly connected to the fixed base.

[0053] In order to ensure the accuracy of the elastic performance test of the spring washer 9 and to avoid the shaking of the fixed base 1 from affecting the experimental data, the fixed base 1 of the present invention is provided with multiple through holes, and the fixed base is fixed to the test table by bolts passing through the through holes.

[0054] Specifically, such as Figure 3 As shown, the fixing base 1 of the present invention is provided with a plurality of through holes, for example, four through holes, namely a first through hole, a second through hole, a third through hole and a fourth through hole. The first through hole to the fourth through hole are evenly distributed along the circumferential direction of the fixing base 1 on the upper end surface of the fixing base 1, and are located on the relatively upwardly convex annular step formed by the concave annular step on the top surface of the fixing base 1. It should be noted that the upwardly convex annular step, the concave annular step and the central hole of the fixing base are all...

[0055] It should be noted that, in order to improve the testing efficiency of the testing device for the elastic performance of the spring washer 9, the testing device of the present invention also includes washers 8, the number of washers 8 being equal to the number of spring washers 9; there are multiple spring washers 9 between the preload nut 5 and the conductive washer 6, and the multiple spring washers 9 and the spring washers 9 and the preload nut 5 are separated by washers 8.

[0056] Compared with the prior art, the present invention separates adjacent spring washers 9 of the same specification by using washers 8, so as to ensure that the spring washers 9 are subjected to uniform force when bearing axial preload.

[0057] To further improve the applicability of the testing device, the stepped stud 3 of the present invention is an overall stepped pagoda structure. The stepped stud 3 also includes a second-order stud 12 and a third-order stud 13. The second-order stud 12 and the third-order stud 13 are arranged sequentially between the first-order stud 11 and the fixed section 14, and the outer diameters of the first-order stud 11, the second-order stud 12 and the third-order stud 13 increase sequentially.

[0058] It should be noted that the second-order stud 12 and the third-order stud 13 have the same structure and height as the first-order stud 11, that is, they include an external thread section and a smooth cylindrical section. The external thread section is used to cooperate with the preload nut 5 to apply axial preload to the multiple spring washers 9 sleeved on the smooth cylindrical section below.

[0059] Specifically, such as Figure 4 As shown, the external thread section of the first-order stud 11 is located above its smooth cylindrical section. The smooth cylindrical section of the first-order stud 11 is connected to the external thread section of the second-order stud 12. The smooth cylindrical section of the second-order stud 12 is connected to the external thread section of the third-order stud 13. The smooth cylindrical section of the third-order stud 13 is connected to the fixed section 14. It should be noted that the fixed section 14 is a stud with an M48 external thread, which is used to cooperate with the fixed base 1 to keep the stepped stud 3 firmly and vertically fixed.

[0060] It should also be emphasized that, due to their different outer diameters, first-order studs 11, second-order studs 12, and third-order studs 13 correspond to spring washers 9 of different sizes. That is, when testing the elastic performance of spring washers 9 using first-order studs 11, second-order studs 12, and third-order studs 13, they need to be matched with force-applying sleeves 4, transmission washers 6, and preload nuts 5 of different sizes to load and unload the preload force on spring washers 9 of different specifications. In other words, first-order studs 11, second-order studs 12, and third-order studs 13 cannot simultaneously test the elastic performance of spring washers 9 of different specifications. Instead, the elastic performance test is performed on one stud at a time, selecting multiple spring washers 9 that match its specifications.

[0061] In addition, multiple spring washers 9, separated by washers 8 and matching the size of the corresponding step studs, can be placed simultaneously on the smooth cylindrical section of each stepped stud 3, thereby enabling the loading and unloading of preload on multiple spring washers 9 of the same specification at one time.

[0062] It should also be emphasized that the testing device of the present invention includes a series of eight stepped studs 3, numbered T1-T8. The outer diameters of the first-order stud 11, second-order stud 12, third-order stud 13, and fixed section 14 of T1 are 2mm, 2.5mm, 3mm, and 48mm, respectively; the outer diameters of the first-order stud 11, second-order stud 12, third-order stud 13, and fixed section 14 of T2 are 4mm, 5mm, 6mm, and 48mm, respectively; the outer diameters of the first-order stud 11, second-order stud 12, third-order stud 13, and fixed section 14 of T3 are 8mm, 10mm, 12mm, and 48mm, respectively; and the outer diameters of the first-order stud 11, second-order stud 12, third-order stud 13, and fixed section 14 of T4 are 14mm, 16mm, 18mm, and 48mm, respectively. The outer diameters of the first-order stud 11, second-order stud 12, third-order stud 13, and fixing section 14 of T5 are 20mm, 22mm, 24mm, and 48mm, respectively; the outer diameters of the first-order stud 11, second-order stud 12, third-order stud 13, and fixing section 14 of T6 are 27mm, 30mm, 33mm, and 48mm, respectively; the outer diameters of the first-order stud 11, second-order stud 12, third-order stud 13, and fixing section 14 of T7 are 36mm, 39mm, 42mm, and 48mm, respectively; the outer diameters of the first-order stud 11 and fixing section 14 of T8 are 45mm and 48mm, respectively. Except for the outer diameter of the fixing section 14, which is 48mm, the heights of all other studs are the same, that is, the heights of the first-order stud 11, second-order stud 12, and third-order stud 13 are the same.

[0063] The force-applying sleeves 4 are divided into three series based on their height, numbered S1-S3, namely the first force-applying sleeve 4 (S1), the second force-applying sleeve 4 (S2), and the third force-applying sleeve 4 (S3). The height of the first force-applying sleeve 4 increases progressively from the third to the first. The height of the second force-applying sleeve 4 is twice that of the first force-applying sleeve 4, and the height of the third force-applying sleeve 4 is three times that of the first force-applying sleeve 4. When testing spring washers 9 of different sizes and specifications, the first stepped stud 3 is used in conjunction with the third force-applying sleeve 4, the second stepped stud 3 is used in conjunction with the second force-applying sleeve 4, and the third stepped stud 3 is used in conjunction with the first force-applying sleeve 4.

[0064] It should be noted that the spring washer 9 elastic performance testing device disclosed in this invention is applicable to standard spring washers, light spring washers, heavy spring washers, wave spring washers, saddle spring washers, and spring washers of all sizes from 2mm to 48mm. It is mainly used for loading and unloading spring washers 9.

[0065] It should be noted that the preload nut 5 of the corresponding size can be selected according to the size specifications of the spring washer 9. In addition, the outer diameter of the conducting washer 6 is the same as the outer diameter of the force-applying sleeve 4, and the inner diameter of the conducting washer 6 is divided into 2mm-48mm depending on the different specifications of the spring washer 9.

[0066] This invention cleverly utilizes a ring pressure sensor 2, and applies preload through the cooperation of a preload nut 5 and a stepped stud 3. This allows for easy three consecutive loading and unloading of the fixed load on the spring washer 9. It does not rely on large equipment and has low requirements for related hardware. Multiple spring washers 9 can be loaded and unloaded with specified loads in a single operation. The structure is simple, stable, reliable, easy to operate, low in cost, and highly efficient, with a wide range of applications.

[0067] Example 1

[0068] In this embodiment, the spring washer 9 to be tested for elastic performance is a standard spring steel washer 8 (or a light spring washer, heavy spring washer, wave spring washer, or saddle spring washer), with a quantity of 5 pieces and a specification of 5mm (spring washers 9 of all sizes from 2mm to 48mm are acceptable). According to the specification of the spring washer 9, an M5 preload nut 5, a conductive washer 6 with an inner diameter of 5mm, a stepped stud 3, and a force-applying sleeve 4 are selected.

[0069] During implementation, first, the fixed base 1 is fixed to the test bench with bolts. The stepped stud 3 is then securely and vertically fixed to the fixed base 1 with threads. The annular pressure sensor 2 and the force display 7 are then removed. The annular pressure sensor 2 is placed over the stepped stud 3 and into the annular groove on the upper surface of the fixed base 1. Next, the force-applying sleeve 4 is placed over the stepped stud 3 and onto the upper convex ring of the annular pressure sensor 2. Then, the conductive washer 6 is placed over the stepped stud 3 and onto the force-applying sleeve 4. Following this, five washers 8 and five spring washers 9 are placed over the stepped stud 3, spaced apart on the conductive washer 6. Finally, the M5 preload nut 5 is tightened onto the stepped stud 3. The power is then connected, and the pressure is monitored via the force display 7. The sensor reading is zeroed. Tighten the preload nut 5 with a wrench while observing the force value display 7. When the force value display 7 shows a force of 5050N, stop tightening the preload nut 5, then loosen the preload nut 5. After unloading and allowing the spring washer 9 to reach a free state, tighten the preload nut 5 again until the preload force reaches 5050N. Stop tightening the preload nut 5 again. Repeat the loading and unloading process 3 times. The preload nut 5 can then be unscrewed. Take out the tested spring washer 9 and place it on a platform. Measure its free height with a height gauge. According to the standard for elasticity testing methods, a height greater than or equal to 1.67 times the nominal S is considered qualified, and a height less than 1.67 times the nominal S is considered unqualified. Thus, the elasticity test of 5 spring washers 9 is completed.

[0070] In summary, the spring washer 9 elastic performance testing device provided by this invention effectively solves the problems of existing spring washer 9 elastic performance testing devices requiring additional large equipment such as electronic universal testing machines, high requirements for test site space and related hardware, and cumbersome operation and low efficiency. The testing device of this invention does not require large equipment, has low requirements for related hardware, and can perform specified load loading and unloading on multiple (3-5) spring washers 9 at a time. A single stepped stud 3 can be used with preload nuts 5 and conductive washers 6 of different sizes to achieve elasticity testing of multiple specifications of spring washers 9. It has a simple structure, is stable and reliable, easy to operate, low cost, and high efficiency. It has a wide range of applications and is suitable for elasticity testing of standard spring washers, light spring washers, heavy spring washers, wave spring washers, saddle spring washers, and spring washers of all sizes from 2mm to 48mm.

[0071] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for testing the spring washer elasticity, characterized in that, The fixed base, the pressure measurement and display assembly, the stepped stud, the pre-tightening force applying assembly and the pre-tightening force conducting assembly are included. The lower end of the stepped stud is fixed on the fixed base, and the stepped stud penetrates the pre-tightening force applying assembly, the spring washer, the pre-tightening force conducting assembly and the pressure measurement and display assembly in sequence from top to bottom. The pre-tightening force applying assembly is used to apply pre-tightening force to the spring washer, the pre-tightening force conducting assembly is used to conduct pre-tightening force, and the pressure measurement and display assembly is used to measure and display the pre-tightening force of the spring washer during loading and unloading. The pre-tightening force conducting assembly includes a conducting washer and a force applying sleeve, the conducting washer is arranged below the spring washer and above the force applying sleeve. The pre-tightening force applying assembly includes a pre-tightening nut. The pre-tightening nut, the conducting washer and the force applying sleeve are all provided with a central hole, and the stepped stud penetrates the central holes of the pre-tightening nut, the conducting washer and the force applying sleeve in sequence. The pressure measurement and display assembly includes a ring-shaped pressure sensor and a force value display, and the force value display is connected with the ring-shaped pressure sensor through a wire. The stepped stud includes a first-order stud and a fixed segment, and the first-order stud includes an outer threaded segment and a smooth cylindrical segment from top to bottom. The outer threaded segment is used to cooperate with the pre-tightening nut to apply axial pre-tightening force to the spring washer on the smooth cylindrical segment, and the fixed segment is embedded on the conducting washer and the force applying sleeve and is fixedly connected with the fixed base at the bottom end. The stepped stud has a stepped pagoda structure, and the stepped stud further includes a second-order stud and a third-order stud, the second-order stud and the third-order stud are arranged between the first-order stud and the fixed segment in sequence, and the outer diameters of the first-order stud, the second-order stud and the third-order stud increase in sequence. The second-order stud and the third-order stud have the same structure and height as the first-order stud, that is, the second-order stud and the third-order stud both include an outer threaded segment and a smooth cylindrical segment, and the outer threaded segment is used to cooperate with the pre-tightening nut to apply axial pre-tightening force to multiple spring washers arranged on the smooth cylindrical segment in sequence. The spring washer elastic performance testing device is suitable for standard spring washers, light spring washers, heavy spring washers, wave spring washers, saddle spring washers and spring washers with a size of 2mm-48mm.

2. The device for testing the spring washer elastic properties according to claim 1, characterized in that, The fixed base is provided with a concave annular step at the top, and the annular step has the same center as the fixed base, and the ring-shaped pressure sensor is arranged on the annular step, and the outer diameter of the ring-shaped pressure sensor matches the outer diameter of the annular step.

3. The device for testing the spring washer elastic properties according to claim 2, characterized in that, The upper end surface of the ring-shaped pressure sensor is provided with a convex annular platform, and the lower end surface of the force applying sleeve is arranged on the convex annular platform.

4. The device for testing the spring washer elastic properties according to claim 3, characterized in that, The fixed base is provided with a threaded hole at the center, and the bottom end of the fixed segment of the stepped stud is threadedly connected with the fixed base.

5. The device for testing the spring washer elastic properties according to claim 1, characterized in that, The pre-tightening nut and the conducting washer are separated by the spring washers, and the spring washers are separated by the washer.

6. A device for testing the spring washer properties according to any one of claims 1 to 5, characterized in that The fixing base is provided with a plurality of through holes, and the fixing base is fixed to the experiment table by bolts penetrating through the through holes.

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