Disc spring mechanism performance testing device and measuring method

Abstract

The invention provides a disc spring mechanism performance testing device and a disc spring mechanism performance measuring method. The disc spring mechanism performance testing device comprises a first tension assembly and a second tension assembly, the first tension assembly and the second tension assembly are allowed to move reversely through pulling of a tensile machine, and each of the first tension assembly and the second tension assembly comprises a fixed shaft, a pin shaft, a fixed plate, an adjusting sleeve and a shaft sleeve; the pin shaft penetrates through the fixing shaft and the fixing plates on the two sides of the fixing shaft, and the fixing shaft and the fixing plates on the two sides are arranged in parallel and are allowed to slide in the axial direction of the pin shaft. The peripheral side of the pin shaft is sleeved with a shaft sleeve, and the shaft sleeve is provided with a through hole for the fixing shaft and the fixing plate to penetrate through; adjusting sleeves for adjusting the positions of the shaft sleeves are arranged at the end parts of the shaft sleeves of the first tension component and / or the second tension component. Compared with a conventional disc spring pre-tightening force test pressing mode, the disc spring pre-tightening force test device solves the problem that the weight factor of the test device affects the precision of a test value.

Description

Technical Field

[0001] The present invention relates to the field of testing devices, and in particular to a disc spring mechanism performance testing device and a measuring method. In particular, a small-force disc spring preload testing device and a testing method thereof are designed for final assembly and testing of aerospace vehicles. Background Art

[0002] The switching locking mechanism is a key component in a certain aerospace vehicle. Its core function is to output a stable clamping force in the clamping state. The stability of the clamping force is determined by the preload force of the disc spring mechanism. A set of products consists of multiple clamping points. Therefore, the consistency of the preload force of the disc spring mechanism of the same set of products is an important guarantee for product reliability.

[0003] The functional principle of the disc spring mechanism is that when the position distance of the product installation axis changes, the disc spring can provide different reverse force values to the installation axis. Its main indicator requirement is that the disc spring preload value is 2131±60N when the installation axis moves 4mm.

[0004] Existing conventional disc spring preload test generally adopts the downward pressure method. Since the preload of this disc spring mechanism is a small force product, the downward pressure method will affect the test value accuracy due to the weight factor of the test device. Therefore, it is necessary to design a small force disc spring mechanism performance test device and provide a reliable new test method. Summary of the Invention

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a disc spring mechanism performance testing device and measurement method.

[0006] A disc spring mechanism performance testing device provided according to the present invention includes: a first tension component and a second tension component;

[0007] The first tension assembly and the second tension assembly are allowed to move in opposite directions by pulling of the tensile machine. The first tension assembly and the second tension assembly each include: a fixed shaft, a pin shaft, a fixed plate, an adjustment sleeve and a shaft sleeve;

[0008] The pin passes through the fixed shaft and the fixing plates on both sides of the fixed shaft. The fixed shaft and the fixing plates on both sides are arranged in parallel and are allowed to slide along the axial direction of the pin;

[0009] A shaft sleeve is sleeved on the circumference of the pin shaft, and a through hole is opened on the shaft sleeve for the fixed shaft and the fixed plate to pass through;

[0010] An adjustment sleeve for adjusting the position of the shaft sleeve is provided at the end of the shaft sleeve of the first tension component and / or the second tension component.

[0011] Preferably, the fixing plates of the first tension assembly and the second tension assembly are arranged in parallel, and the two fixing plates of the first tension assembly are respectively located on the outsides of the two fixing plates of the second tension assembly.

[0012] Preferably, the fixed axis of the first tension component is located away from one end of the second tension component, one end of the fixed plate of the first tension component is connected to the pin of the first tension component, and the other end extends toward the second tension component;

[0013] The fixed axis of the second tension component is located away from one end of the first tension component. One end of the fixed plate of the second tension component is connected to the pin of the second tension component, and the other end extends toward the first tension component.

[0014] Preferably, one end of the fixed shaft is set as a cylindrical end, and the other end is set as a flat end. The flat end of the fixed shaft is used to connect the pin shaft, and the cylindrical end of the fixed shaft is used to clamp the chuck of the tensile machine.

[0015] Preferably, a nut is installed at one end of the pin.

[0016] Preferably, the side surface of the fixing plate is provided with a connecting hole and a travel groove;

[0017] The connecting hole is used for the pin to pass through, and the axis directions of the travel groove and the connecting hole are consistent.

[0018] Preferably, all four sides of the travel groove are provided with round chamfers, and one side of the travel groove is provided with a U-shaped groove bottom for improving the relative structural accuracy of the fixing plate.

[0019] Preferably, it comprises: a disc spring mechanism installed between two sets of fixing plates of the first tension component and the second tension component;

[0020] The disc spring mechanism includes: a disc spring, a disc spring main shaft, an adjustment washer, a first force-bearing shaft and a second force-bearing shaft;

[0021] The disc spring main shaft is surrounded by a disc spring assembly, and the first and second force-bearing shafts are vertically mounted at both ends of the disc spring main shaft, and the second force-bearing shaft is allowed to slide axially along the disc spring main shaft;

[0022] One end of the disc spring abuts against a protrusion at the end of the disc spring main shaft, and the other end abuts against the second force-bearing shaft. An adjustment gasket is provided between the second force-bearing shaft and the disc spring.

[0023] Preferably, both ends of the first force-bearing shaft and the second force-bearing shaft pass through the travel slots of the fixing plates of the first tension assembly and the second tension assembly on both sides respectively and are allowed to slide along the travel slots.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] Compared with the conventional downward pressure method for disc spring preload testing, this application solves the problem that the weight of the test device itself affects the accuracy of the test value. At the same time, the test method is consistent with the functional use of the disc spring mechanism, eliminating the difficulty of analyzing the impact of uncertainty factors on the actual functional use of the disc spring mechanism by the test method, and provides a new solution for disc spring preload testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0027] Figure 1 This is a schematic diagram of the disc spring mechanism performance test device;

[0028] Figure 2 Schematic diagram of the fixed plate structure;

[0029] Figure 3 Schematic diagram of the fixed shaft structure;

[0030] Figure 4 Schematic diagram of the disc spring mechanism structure;

[0031] As shown in the figure:

[0032] DETAILED DESCRIPTION

[0033] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0034] Example 1

[0035] like Figure 1 As shown, this embodiment includes: a first tension assembly and a second tension assembly; the first tension assembly and the second tension assembly are allowed to move in opposite directions by pulling of the tensile machine, and the first tension assembly and the second tension assembly both include: a fixed shaft 1, a pin shaft 3, a fixed plate 4, an adjustment sleeve 5 and a sleeve 6; the pin shaft 3 passes through the fixed shaft 1 and the fixed plates 4 on both sides of the fixed shaft 1, and one end of the pin shaft 3 can be fixed by a nut 2. The fixed shaft 1 and the fixed plates 4 on both sides are arranged in parallel and allow axial sliding along the pin shaft 3. The circumferential side of the pin shaft 3 is provided with a sleeve 6, and a through hole is opened on the sleeve 6 for the fixed shaft 1 and the fixed plate 4 to pass through. The end of the sleeve 6 of the first tension assembly and / or the second tension assembly is provided with an adjustment sleeve 5 for adjusting the position of the sleeve 6.

[0036] The fixing plates 4 of the first and second tensioning assemblies are arranged in parallel, with the two fixing plates 4 of the first tensioning assembly located outside the two fixing plates 4 of the second tensioning assembly. The fixing shaft 1 of the first tensioning assembly is located away from the end of the second tensioning assembly. One end of the fixing plate 4 of the first tensioning assembly is connected to the pin 3 of the first tensioning assembly, and the other end extends toward the second tensioning assembly. The fixing shaft 1 of the second tensioning assembly is located away from the end of the first tensioning assembly. One end of the fixing plate 4 of the second tensioning assembly is connected to the pin 3 of the second tensioning assembly, and the other end extends toward the first tensioning assembly.

[0037] like Figure 2 As shown, a connecting hole and a travel groove are provided on the side of the fixed plate 4. The connecting hole is used for the pin shaft 3 to pass through. The axial directions of the travel groove and the connecting hole are consistent. The four sides of the travel groove are provided with round chamfers. A U-shaped groove bottom is provided on one side of the travel groove to improve the relative structural accuracy of the fixed plate 4.

[0038] like Figure 3 As shown, one end of the fixed shaft 1 is set as a cylindrical end, and the other end is set as a flat end. The flat end of the fixed shaft 1 is used to connect the pin shaft 3, and the cylindrical end of the fixed shaft 1 is used to clamp the chuck of the tensile machine.

[0039] like Figure 4 The figure shows a disc spring mechanism installed between two sets of fixed plates 4 of the first and second tension assemblies. The disc spring mechanism includes a disc spring 7, a disc spring spindle 8, an adjustment washer 9, a first force-bearing shaft 10, and a second force-bearing shaft 11. The disc spring spindle 8 is surrounded by a ring around the disc spring assembly 7. The first and second force-bearing shafts 10 and 11 are perpendicularly mounted at both ends of the disc spring spindle 8. The second force-bearing shaft 11 is allowed to slide axially along the disc spring spindle 8. One end of the disc spring 7 abuts the protrusion at the end of the disc spring spindle 8, and the other end abuts the second force-bearing shaft 11. An adjustment washer 9 is provided between the second force-bearing shaft 11 and the disc spring 7. The ends of the first and second force-bearing shafts 10 and 11 respectively pass through the travel slots of the fixed plates 4 of the first and second tension assemblies on both sides and are allowed to slide along the travel slots.

[0040] This embodiment also provides a measurement method using the disc spring mechanism performance testing device, including the following steps: Step S1, setting the tension value of the tensile testing machine and defining it as the initial stroke zero position of the disc spring mechanism performance test, setting the maximum protection force value of the tensile testing machine and setting the total displacement of the tensile testing machine to run 5mm on this basis; Step S2, the tensile testing machine is first stretched 4mm, recording the disc spring mechanism preload force display value of the tensile testing machine at this time, and judging whether it meets the required value of the disc spring mechanism preload force. If not, the disc spring mechanism preload force value is adjusted by increasing or decreasing the adjustment gasket 9. In step S3, the tensile testing machine stretches for another 1 mm, and records the force value displayed at the end of the stroke of the disc spring mechanism of the tensile testing machine at this time; in step S4, repeat steps S1-S3 multiple times to save the torque curve of the full stroke of the disc spring mechanism; in step S5, compare the multiple pre-tightening force display values recorded for the same disc spring mechanism, requiring the performance deviation force value to be less than or equal to 1%; compare the multiple stroke end display force values recorded for the same disc spring mechanism, requiring the performance deviation force value to be less than or equal to 1%; in step S6, compare the performance of the disc spring mechanism of the same production batch, and the mean deviation of the multiple pre-tightening force display values recorded for the disc spring mechanism is less than or equal to 2.5%.

[0041] Example 2

[0042] Example 2 is a preferred example of Example 1.

[0043] like Figure 1-4 As shown, this embodiment includes: a fixed shaft 1, a nut 2, a pin 3, a fixed plate 4, an adjustment sleeve 5, and a sleeve 6. The fixed shaft 1, nut 2, pin 3, fixed plate 4, adjustment sleeve 5, sleeve 6 and other parts are all made of 0Cr17, and are aged to HRC28-32 after solution treatment. There is a U-shaped groove on one side of the axis of the fixed plate 4, and all four sides of the U-shaped groove have R1 rounded chamfers. The U-shaped groove is used for product positioning and installation, and is consistent with the axis of the circular hole on one side. The circular hole is used to install the pin 3 to bear the tensile force; the sleeve 15 and sleeve 26 are used to control the coaxiality of the fixed shaft 1 and the position accuracy of the fixed plate 4; the nut M122 and adjustment sleeve 7 provide the structural strength of the test device itself; as shown Figure 1 As shown: The force-bearing axis of the disc spring mechanism can achieve adaptive center positioning in the U-shaped structure of the fixed plate of the test device. The force-bearing axis of the disc spring mechanism is installed in the test device. It is necessary to measure the distance between the end face of the force-bearing axis of the disc spring mechanism and the plane of the fixed plate to determine the installation position accuracy of the disc spring mechanism in the test device. It is necessary to adjust the force-bearing axis of the disc spring mechanism and the test device to be consistent, that is, to achieve the coincidence of the X-axis of tension of the test device, disc spring mechanism and tensile testing machine, so as to obtain the most accurate test force value parameters;

[0044] The fixed shaft 1 has a coaxial structure at both ends. The cylindrical end of the fixed shaft 1 is the connection end for the tensile machine chuck, and the other end is a centrally symmetrical flat structure. The coaxial accuracy of the fixed shaft 1 at both ends is required to be less than or equal to 0.02mm after installation.

[0045] The fixed plate 4 is a left-right installation structure. The fixed plate 4 has a 70mm×11mm stroke groove with a thickness of 6mm. The bottom of one side of the stroke groove is U-shaped and is used for positioning and installing the disc spring mechanism. The four sides of the stroke groove have R1 round chamfers to prevent friction from damaging the disc spring mechanism and the superposition of friction from affecting the test accuracy. The U-shaped groove bottom is used for product positioning and installation, and is consistent with the axis of the connecting hole on one side. The connecting hole is used to install the pin 3 to bear the tension and to locate the consistency of the preload axis of the disc spring mechanism and the axis of the tensile testing machine. The processing of the fixed plate 4 requires a one-time clamping and combined processing of the connecting hole, stroke groove, U-shaped groove bottom and other structural features to ensure the relative structural accuracy of the fixed plate 4 after installation. The four sides of the stroke groove have R1 round chamfers to prevent friction from damaging the disc spring mechanism and the superposition of friction from affecting the test accuracy.

[0046] The sleeve 6 can adjust the relative position accuracy of the fixed shaft 1 between the fixed plates 4 by changing the thickness, that is, to ensure that the coaxial accuracy requirement of the fixed shafts 1 at both ends after installation is less than or equal to 0.02mm, so as to achieve consistency between the tensile force of the tensile testing machine and the axis of the test device.

[0047] The first force-bearing axis 10 and the second force-bearing axis 11 of the disc spring mechanism are installed in the stroke groove. The first force-bearing axis 10 and the second force-bearing axis 11 cooperate with the U-shaped groove bottom in the stroke groove of the fixed plate 4 to achieve adaptive center positioning. It is necessary to judge the installation position accuracy of the disc spring mechanism in the test device by measuring the distance between the end faces of the first force-bearing axis 10 and the second force-bearing axis 11 and the plane of the fixed plate 4.

[0048] Nut 2 is an M12 nut, which facilitates the simple assembly and disassembly of the disc spring mechanism. Nut 2 and adjustment sleeve 5 are used to fix the installation of shaft 1 and fixing plate 4, ensuring that the structural rigidity of the test device itself can bear a tensile force of 3600N.

[0049] The fixed shaft 1 transmits the force to the pin 3, the pin 3 transmits the force to the fixed plate 4, and the travel groove of the fixed plate 4 transmits the force to the first force-bearing shaft 10 and the second force-bearing shaft 1 of the disc spring mechanism. Therefore, the fixed shaft 1 has no connection with the disc spring mechanism, and the fixed shaft 1 only serves as a connection and force transmission for the tensile machine.

[0050] A testing method of this embodiment includes the following steps:

[0051] Step 1: Set the tension value to 5N as the initial stroke zero position for the disc spring mechanism performance test, set the maximum protection force value of the tensile testing machine to 3000N, and on this basis set the total displacement of the tensile testing machine to run 5mm to meet the preload requirement of the disc spring mechanism to 2131±60N.

[0052] Step 2: Compare the four preload force readings recorded for the same disc spring mechanism, requiring a performance deviation of less than or equal to 1%. Compare the four end-of-travel force readings recorded for the same disc spring mechanism, requiring a performance deviation of less than or equal to 1%. Compare the performance of disc spring mechanisms from the same production batch; the average deviation of the four preload force readings recorded for the disc spring mechanism must be less than or equal to 2.5%.

[0053] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0054] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A disc spring mechanism performance testing device, characterized in that: include: a first tension component and a second tension component; The first tension component and the second tension component are allowed to move in opposite directions by pulling of a tensile machine, and the first tension component and the second tension component each comprise: a fixed shaft (1), a pin shaft (3), a fixed plate (4), an adjustment sleeve (5) and a shaft sleeve (6); The pin shaft (3) passes through the fixed shaft (1) and the fixed plates (4) on both sides of the fixed shaft (1); the fixed shaft (1) and the fixed plates (4) on both sides are arranged in parallel and are allowed to slide axially along the pin shaft (3); A shaft sleeve (6) is sleeved on the circumferential side of the pin shaft (3), and a through hole is opened on the shaft sleeve (6) through which the fixed shaft (1) and the fixed plate (4) pass; An adjustment sleeve (5) for adjusting the position of the shaft sleeve (6) is provided at the end of the shaft sleeve (6) of the first tension component and / or the second tension component.

2. The disc spring mechanism performance testing device according to claim 1, characterized in that: The fixing plates (4) of the first tension component and the second tension component are arranged in parallel, and the two fixing plates (4) of the first tension component are respectively located outside the two fixing plates (4) of the second tension component.

3. The disc spring mechanism performance testing device according to claim 1, characterized in that: The fixed shaft (1) of the first tension component is located away from one end of the second tension component, and one end of the fixed plate (4) of the first tension component is connected to the pin shaft (3) of the first tension component, and the other end extends toward the second tension component; The fixed shaft (1) of the second tension component is located away from one end of the first tension component, and one end of the fixed plate (4) of the second tension component is connected to the pin shaft (3) of the second tension component, and the other end extends toward the first tension component.

4. The disc spring mechanism performance testing device according to claim 1, characterized in that: One end of the fixed shaft (1) is configured as a cylindrical end, and the other end is configured as a flat end. The flat end of the fixed shaft (1) is used for connecting the pin shaft (3), and the cylindrical end of the fixed shaft (1) is used for clamping the chuck of the tensile testing machine.

5. The disc spring mechanism performance testing device according to claim 1, characterized in that: One end of the pin shaft (3) is mounted with a nut (2).

6. The disc spring mechanism performance testing device according to claim 1, characterized in that: The side surface of the fixing plate (4) is provided with a connection hole and a travel groove; The connecting hole is used for the pin shaft (3) to pass through, and the axis directions of the travel groove and the connecting hole are consistent.

7. The disc spring mechanism performance testing device according to claim 6, characterized in that: The four sides of the travel groove are all provided with round chamfers, and one side of the travel groove is provided with a U-shaped groove bottom for improving the relative structural accuracy of the fixing plate (4).

8. The disc spring mechanism performance testing device according to claim 6, characterized in that: include: A disc spring mechanism installed between two sets of fixing plates (4) of the first tension component and the second tension component; The disc spring mechanism comprises: a disc spring (7), a disc spring main shaft (8), an adjustment washer (9), a first force-bearing shaft (10), and a second force-bearing shaft (11); The disc spring main shaft (8) is surrounded by a disc spring assembly (7), and a first force-bearing shaft (10) and a second force-bearing shaft (11) are vertically installed at both ends of the disc spring main shaft (8), and the second force-bearing shaft (11) is allowed to slide axially along the disc spring main shaft (8); One end of the disc spring (7) abuts against a protrusion at the end of the disc spring main shaft (8), and the other end abuts against a second force-bearing shaft (11). An adjustment gasket (9) is provided between the second force-bearing shaft (11) and the disc spring (7).

9. The disc spring mechanism performance testing device according to claim 8, characterized in that: The two ends of the first force-bearing shaft (10) and the second force-bearing shaft (11) respectively pass through the travel grooves of the fixing plates (4) of the first tension assembly and the second tension assembly on both sides and are allowed to slide along the travel grooves.

10. A measurement method using the disc spring mechanism performance testing device according to claim 9, characterized in that: The following steps are involved: Step S1, setting the tension value of the tensile testing machine and defining it as the initial stroke zero position of the disc spring mechanism performance test, setting the maximum protection force value of the tensile testing machine and setting the total displacement of the tensile testing machine to run 5mm on this basis; Step S2, the tensile testing machine first stretches 4mm, records the disc spring mechanism preload force displayed by the tensile testing machine at this time, and determines whether it meets the required value of the disc spring mechanism preload force. If not, adjust the disc spring mechanism preload force value by adding or removing the adjustment gasket (9). Step S3: The tensile testing machine stretches the disc spring mechanism for another 1 mm, and the force value displayed at the end of the travel of the disc spring mechanism of the tensile testing machine is recorded; Step S4, repeating steps S1-S3 multiple times to save the torque curve of the full stroke of the disc spring mechanism; Step S5, comparing multiple preload force display values recorded for the same disc spring mechanism, requiring the performance deviation force value to be less than or equal to 1%; Compare multiple stroke end display force values recorded for the same disc spring mechanism, and require the performance deviation force value to be less than or equal to 1%; Step S6, comparing the performance of disc spring mechanisms of the same production batch, and the average deviation of the preloaded force values recorded by the disc spring mechanism is less than or equal to 2.5%.

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