Drum rivet shear strength testing device and testing method

Abstract

The present invention provides a drum-type rivet shear strength test device and test method, belonging to the field of rivet testing equipment, including a bracket, a fixed disk, a movable disk, multiple sets of clamps, a torque sensor and a driving component, wherein the movable disk is also provided with a coaxially arranged elastic component and a clutch, and also includes a locking component, the first end of the clutch is connected to the movable disk or the elastic component through the locking component, and the second end of the clutch is connected to the output end of the driving component. By providing a fixed disk and a movable disk that can rotate relative to each other, and the fixed disk and the movable disk are respectively provided with clamps for clamping rivets, the driving component can apply gradually increasing torque to the movable disk through the clutch and the elastic component, and repeatedly apply torque to the movable disk through repeated disconnection / connection of the clutch until a predetermined time is reached or the rivet breaks, so as to judge the shear fatigue performance of the rivet.

Description

Technical Field

[0001] The invention belongs to the technical field of rivet testing equipment, and specifically refers to a drum-type rivet shear strength testing device and a testing method. Background Art

[0002] Drum rivets are a type of rivet used for single-sided riveting. They are also a type of broken core high-strength fastener. After riveting, they can clamp two riveted structural parts. Since drum rivets play a connecting role, in order to ensure the stability of riveting, drum rivets need to have good shear resistance and fatigue resistance. When producing drum rivets, it is necessary to conduct random inspections of shear resistance on mass-produced drum rivets.

[0003] At present, the shear force testing device for drum-type rivets has a relatively simple function and can only perform a maximum shear force test on the rivet, that is, the maximum force that the rivet withstands when it is cut. However, in actual use, especially for drum-type rivets installed on mechanical equipment, the rivets are often subjected to frequent and small shear forces, resulting in fatigue fracture of the rivets, and the existing shear force testing device for drum-type rivets cannot perform shear force fatigue testing. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a drum rivet shear strength testing device and testing method, which at least partially solve the above problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a drum rivet shear strength testing device, comprising:

[0006] A fixed disk and a movable disk are coaxially arranged, wherein the movable disk is rotatably connected to the top surface of the fixed disk;

[0007] Multiple groups of clamps, each group of the clamps has two clamps, which are respectively installed on the fixed plate and the movable plate, each group of two clamps is provided with mounting holes, and the mounting holes on each group of the clamps have different diameters;

[0008] A torque sensor, wherein the fixed plate is fixed to a detection end of the torque sensor, and is used to detect the torque applied to the fixed plate;

[0009] It also includes a driving component and a bracket, the driving component includes a motor and a reducer, the reducer is fixed on the bracket, and the output end of the motor is connected to the output end of the reducer;

[0010] Wherein, the movable disk is also provided with a coaxially arranged elastic component and a clutch, the elastic component is connected to the movable disk, and the clutch is provided with two ends that can be connected / disconnected;

[0011] It also includes a locking component, wherein the first end of the clutch is connected to the movable disk or the elastic component through the locking component, and the output end of the reducer is connected to the second end of the clutch through a transmission shaft;

[0012] When the first end of the clutch is connected to the elastic component through a locking component and the two ends of the clutch are connected, the driving component can apply a gradually increasing torque to the movable disk through the elastic component; when the first end of the clutch is connected to the movable disk through a locking component and the two ends of the clutch are connected, the driving component directly drives the movable disk to rotate.

[0013] Further, the elastic component includes a limit cover and a rotating disk, the limit cover is sleeved on the outside of the rotating disk, the limit cover is coaxially fixed on the movable disk, the rotating disk is coaxially rotatably connected to the movable disk, and two springs arranged along an arc are provided on the inner side of the limit cover;

[0014] The first end of the spring is connected to the limiting cover, the second end of the spring is connected to the rotating disk, and the rotating disk is connected to the first end of the clutch.

[0015] Furthermore, the inner side wall of the limiting cover is provided with two symmetrically arranged fixed support plates, and the first ends of the two springs are respectively connected to the two fixed support plates.

[0016] Furthermore, the turntable is provided with two symmetrically arranged movable support plates, and the second ends of the two springs are respectively connected to the two movable support plates.

[0017] Further, the locking component comprises a flange and a plurality of bolts coaxially fixed to the first end of the clutch, the flange is provided with a plurality of fixing holes, and the plurality of bolts are respectively installed in the plurality of fixing holes;

[0018] The rotating disk is provided with a plurality of second threaded holes corresponding to the bolts, and the movable disk is provided with a plurality of first threaded holes corresponding to the bolts;

[0019] When the bolt is connected to the second threaded hole, the first end of the clutch is connected to the rotating plate. When the bolt is connected to the first threaded hole, the first end of the clutch is connected to the movable plate.

[0020] Furthermore, it also includes a bracket for supporting the driving component, the driving component includes a motor and a reducer, the reducer is fixed on the bracket, the output end of the motor is connected to the output end of the reducer, and the output end of the reducer is connected to the second end of the clutch through a transmission shaft.

[0021] Furthermore, the fixed plate and the movable plate are both provided with a plurality of clamp grooves, and the clamps are detachably connected in the clamp grooves.

[0022] Furthermore, the clamp includes two symmetrically arranged clamping plates, both of which are provided with semicircular grooves, and the mounting hole is composed of two semicircular grooves.

[0023] Furthermore, a slot is formed on the side wall of the clamp groove, and a slider corresponding to the slot is formed on the side wall of the clamp plate, and the slider is slidably inserted into the slot.

[0024] A second aspect of the present invention provides a method for testing the shear strength of a drum rivet, using the above-mentioned drum rivet shear strength testing device, comprising the following steps:

[0025] Step S1, installing the rivet, selecting a corresponding set of the clamps according to the diameter of the rivet to be measured, passing the rivet through the mounting holes of the two clamps in the set, and then riveting the rivet to the two clamps;

[0026] Step S2, start testing:

[0027] Maximum shear resistance test: the locking component is switched to the first end of the clutch and connected to the movable disk through the locking component, the two ends of the clutch are combined, and the driving component applies torque to the movable disk through the clutch, so that the two clamps apply shear force to the riveted rivets, and the torque sensor detects the torque in real time until the riveting breaks. The maximum torque value before the break is converted to the maximum shear resistance of the rivet;

[0028] Shear force fatigue test: the locking component is switched to the first end of the clutch, and the first end is connected to the elastic component through the locking component. The two ends of the clutch are combined, and the driving component drives the clutch to rotate. The elastic stroke of the elastic component is compressed, and a gradually increasing torque is applied to the movable disk, so that the two clamps apply shear force to the riveted rivets, and the torque sensor detects the torque in real time. When the torque reaches the preset value F, the two ends of the clutch are disconnected, and the elastic stroke of the elastic component is reset. When the torque is less than the preset value F, the two ends of the clutch are combined again, and the above steps are repeated to repeatedly apply shear force to the rivet until the predetermined time is reached or the rivet breaks, and the shear force fatigue performance of the rivet is judged;

[0029] Step S3, remove the rivet, open the clamp, take out the rivet, and rotate the movable disk until each group of two clamps overlap and reset for the next test.

[0030] The beneficial effects achieved by the present invention using the above structure are as follows:

[0031] 1. By providing a fixed disk and a movable disk that can rotate relatively, and the fixed disk and the movable disk are respectively provided with a clamp for clamping the rivet, the driving component can apply a gradually increasing torque to the movable disk through a clutch and an elastic component, and repeatedly disconnect / engage the clutch to repeatedly apply torque to the movable disk until a predetermined time is reached or the rivet breaks, so as to judge the shear fatigue performance of the rivet;

[0032] 2. By switching the locking component, the driving component can directly drive the movable plate to rotate through the clutch, so that the two clamps apply shear force to the riveted rivets, and the torque sensor detects the torque size in real time until the rivet breaks. The maximum torque value before the break is converted into the maximum shear resistance of the rivet. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of a drum rivet shear strength testing device proposed in an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the installation position of a spring in a drum-type rivet shear strength testing device proposed in an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of the structural disassembly of an elastic component in a drum-type rivet shear strength testing device proposed in an embodiment of the present invention;

[0036] Figure 4 A partial cross-sectional view of a limit cover in a drum-type rivet shear strength testing device provided in an embodiment of the present invention;

[0037] Figure 5 A schematic diagram of the structure of a fixture in a drum rivet shear strength testing device proposed in an embodiment of the present invention.

[0038] Among them, 100, bracket; 1, fixed plate; 2, movable plate; 201, first threaded hole; 101, clamp slot; 102, slot; 3, clamp; 31, clamp plate; 32, slider; 301, mounting hole; 4, torque sensor; 5, driving component; 6, elastic component; 61, limit cover; 62, turntable; 63, spring; 64, movable support plate; 65, fixed support plate; 7, clutch; 71, flange; 701, fixing hole; 601, second threaded hole; 8, bolt.

[0039] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0042] like Figure 1 As shown, the present invention proposes a drum-type rivet shear strength testing device, which includes a bracket 100, a fixed plate 1, a movable plate 2, a clamp 3, a torque sensor 4 and a driving component 5.

[0043] The fixed disk 1 and the movable disk 2 are arranged coaxially with each other, and the movable disk 2 is rotatably connected to the top surface of the fixed disk 1 through a rotating shaft. There are multiple groups of clamps 3, each group has two, which are respectively installed on the fixed disk 1 and the movable disk 2. Each group of two clamps 3 is provided with a mounting hole 301, and the mounting holes 301 on each group of clamps 3 have different diameters, so rivets of different diameters can be installed for testing.

[0044] Thus, during the test, the rivet is passed through the mounting hole 301 on the corresponding group of clamps 3, and then both ends of the rivet are riveted to the upper and lower sides of the group of clamps 3. Since each group of two clamps 3 are respectively fixed on the fixed disk 1 and the movable disk 2, by making the fixed disk 1 and the movable disk 2 rotate relative to each other, the two clamps 3 apply shear force to the rivet.

[0045] The torque sensor 4 is connected to the bracket 100, and the fixed plate 1 is fixed on the detection end of the torque sensor 4. When the fixed plate 1 and the movable plate 2 rotate relative to each other, the torque sensor 4 can detect the torque applied to the fixed plate 1, which is calculated as the shear force applied to the rivet. By recording the maximum torque applied to the fixed plate 1 before the rivet breaks, the maximum shear resistance of the rivet is calculated.

[0046] The driving component 5 is connected to the bracket 100 and can drive the movable disk 2 to rotate.

[0047] Furthermore, a plurality of clamp grooves 101 are provided on the fixed plate 1 and the movable plate 2 , and the clamps 3 are detachably connected in the clamp grooves 101 .

[0048] In a specific embodiment, the clamp 3 includes two symmetrically arranged clamps 31, both clamps 31 are provided with semicircular grooves, and the mounting hole 301 is composed of two semicircular grooves. When the clamp 3 is installed in the clamp groove 101, the two clamps 31 are in a fitted state. When the clamp 3 is taken out of the clamp groove 101, the two clamps 31 can be opened.

[0049] In this way, when the rivet fastened in the mounting hole 301 is not cut off and needs to be replaced, the two clamping plates 31 can be opened to remove the fastened rivet, thereby improving the convenience of operation.

[0050] Furthermore, a slot 102 is provided on the side wall of the clamp groove 101, and a slider 32 corresponding to the slot 102 is provided on the side wall of the clamp plate 31. The slider 32 is slidably inserted into the slot 102, and the vertical direction of the clamp 3 is limited by the cooperation between the slider 32 and the slot 102.

[0051] At present, the shear force testing device for drum-type rivets has a relatively simple function and can only perform a maximum shear force test on the rivet, that is, the maximum force that the rivet withstands when it is cut. However, in actual use, especially for drum-type rivets installed on mechanical equipment, the rivets are often subjected to frequent and small shear forces, resulting in fatigue fracture of the rivets, and the existing shear force testing device for drum-type rivets cannot perform shear force fatigue testing.

[0052] Combination Figure 2 and Figure 3 As shown, the movable disk 2 is also provided with a coaxially arranged elastic component 6 and a clutch 7, the elastic component 6 is connected to the movable disk 2, the clutch 7 is provided with two connectable / disconnectable ends, and also includes a locking component, the first end of the clutch 7 is connected to the movable disk 2 or the elastic component 6 through the locking component, and the second end of the clutch 7 is connected to the output end of the driving component 5.

[0053] When the first end of the clutch 7 is connected to the movable disk 2 through the locking component and the two ends of the clutch 7 are connected, the driving component 5 directly drives the movable disk 2 to rotate, so that the two clamps 3 apply shear force to the rivet, and the torque sensor 4 detects the torque applied to the fixed disk 1. By recording the maximum torque applied to the fixed disk 1 before the rivet breaks, the maximum shear resistance of the rivet is calculated.

[0054] When the first end of the clutch 7 is connected to the elastic component 6 via the locking component and the two ends of the clutch 7 are connected, the driving component 5 can apply a gradually increasing torque to the movable disk 2 via the elastic component 6 .

[0055] In a specific embodiment, the driving component 5 drives the clutch 7 to rotate, the elastic stroke of the elastic component 6 is compressed, and a gradually increasing torque is applied to the movable disk 2, so that the two clamps 3 apply shear force to the riveted rivets, and the torque sensor 4 detects the torque size in real time. When the torque reaches a preset value F, the two ends of the clutch 7 are disconnected, and the elastic stroke of the elastic component 6 is reset. When the torque is less than the preset value F, the two ends of the clutch 7 are combined again, and the above steps are repeated to repeatedly apply shear force to the rivet until the predetermined time is reached or the rivet breaks, and the shear force fatigue performance of the rivet is judged.

[0056] In some embodiments, the elastic component 6 includes a limit cover 61 and a turntable 62. The limit cover 61 is sleeved on the outside of the turntable 62. The limit cover 61 is coaxially fixed on the movable disk 2. The turntable 62 is coaxially rotatably connected to the movable disk 2. Two springs 63 arranged along an arc are provided on the inner side of the limit cover 61. The first end of the spring 63 is connected to the limit cover 61, and the second end of the spring 63 is connected to the turntable 62. The turntable 62 is connected to the first end of the clutch 7.

[0057] In this way, the first end of the clutch 7 is connected to the turntable 62 through the locking component, and the two ends of the clutch 7 are connected. The driving component 5 drives the clutch 7 to rotate, and the clutch 7 drives the turntable 62 to rotate. The rotating turntable 62 compresses the spring 63, and the greater the distance the spring 63 is compressed, the greater the reaction force. The reaction force of the spring 63 applies a gradually increasing torque to the movable disk 2 through the limit cover 61, and the torque sensor 4 detects the torque size in real time. When the torque reaches the preset value F, the two ends of the clutch 7 are disconnected, the compressed spring 63 is quickly reset, and the turntable 62 and the first end of the clutch 7 are pushed to reverse. At this time, the torque is less than the preset value F, and the two ends of the clutch 7 are combined again to compress the spring 63. The above steps are repeated, and the shear force is repeatedly applied to the rivet until the predetermined time is reached or the rivet breaks, and the shear force fatigue performance of the rivet is judged.

[0058] It should be understood that the torque sensor 4 and the clutch 7 are both automatically controlled by the controller. The controller can manually input a preset torque value F. According to the specifications of the rivet to be tested, the corresponding preset torque value F is input. During the test, when the torque detected by the torque sensor 4 reaches the preset value F, the two ends of the clutch 7 are disconnected. When the torque is less than the preset value F, the two ends of the clutch 7 are connected. The controller is also provided with a manual control mode to manually control the disconnection / connection of the two ends of the clutch 7, and the disconnection / connection of the clutch 7 is not affected by the torque sensor 4.

[0059] In an optional embodiment, the inner side wall of the limit cover 61 is provided with two symmetrically arranged fixed support plates 65, and the fixed support plates 65 are arranged parallel to the end surface of the spring 63, and the first ends of the two springs 63 are respectively connected to the two fixed support plates 65 to increase the stability of the connection;

[0060] Two symmetrically arranged movable support plates 64 are provided on the rotating disk 62 , and the movable support plates 64 are arranged parallel to the end surfaces of the springs 63 , and the second ends of the two springs 63 are respectively connected to the two movable support plates 64 to increase the stability of the connection.

[0061] Combination Figure 3 As shown, the locking component includes a flange 71 and a plurality of bolts 8 coaxially fixed to the first end of the clutch 7, a plurality of fixing holes 701 are provided on the flange 71, and the plurality of bolts 8 are respectively installed in the plurality of fixing holes 701; a plurality of second threaded holes 601 corresponding to the bolts 8 are provided on the turntable 62, and a plurality of first threaded holes 201 corresponding to the bolts 8 are provided on the movable disk 2, so that when the bolts 8 in the fixing holes 701 are connected to the second threaded holes 601, the first end of the clutch 7 is connected to the turntable 62, and the clutch 7 repeatedly applies torque to the movable disk 2 through the elastic component 6, and when the bolts 8 pass through the second threaded holes 601 and are connected to the first threaded holes 201, the first end of the clutch 7 is connected to the movable disk 2, and the clutch 7 can directly drive the movable disk 2 to rotate.

[0062] Combination Figure 1 As shown, the driving component 5 includes a motor and a reducer, the reducer is fixed on the bracket 100, the output end of the motor is connected to the output end of the reducer, and the output end of the reducer is connected to the second end of the clutch 7 through a transmission shaft. The motor can increase the output torque by using the reducer, so that the driving component 5 has sufficient output torque to meet the test requirements.

[0063] A second aspect of the present invention provides a method for testing the shear strength of a drum rivet, using the above-mentioned drum rivet shear strength testing device, comprising the following steps:

[0064] Step S1, installing the rivet, selecting a corresponding set of clamps 3 according to the diameter of the rivet to be measured, passing the rivet through the mounting holes 301 of the two clamps 3 in the set, and then riveting the rivet to the two clamps 3;

[0065] Step S2, start testing:

[0066] Maximum shear resistance test: switch the locking component to the first end of the clutch 7 connected to the movable plate 2 through the locking component, the two ends of the clutch 7 are combined, and the driving component 5 applies torque to the movable plate 2 through the clutch 7, so that the two clamps 3 apply shear force to the riveted rivets, and the torque sensor 4 detects the torque in real time until the riveting breaks. The maximum torque value before the break is converted to the maximum shear resistance of the rivet;

[0067] Shear force fatigue test: switch the locking component to the first end of the clutch 7, connect it to the elastic component 6 through the locking component, the two ends of the clutch 7 are combined, the driving component 5 drives the clutch 7 to rotate, the elastic stroke of the elastic component 6 is compressed, and a gradually increasing torque is applied to the movable disk 2, so that the two clamps 3 apply shear force to the riveted rivets, and the torque sensor 4 detects the torque in real time. When the torque reaches the preset value F, the two ends of the clutch 7 are disconnected, and the elastic stroke of the elastic component 6 is reset. When the torque is less than the preset value F, the two ends of the clutch 7 are combined again, and the above steps are repeated. The shear force is repeatedly applied to the rivet until the predetermined time is reached or the rivet breaks, and the shear force fatigue performance of the rivet is judged;

[0068] Step S3, remove the rivet, open the clamp 3, take out the rivet, and rotate the movable disk 2 until the two clamps 3 in each group overlap and reset for the next test.

[0069] In summary of the above embodiments: by providing a fixed disk 1 and a movable disk 2 that can rotate relatively, and clamps 3 are respectively provided on the fixed disk 1 and the movable disk 2, the rivet is riveted on the two clamps 3, and the fixed disk 1 and the movable disk 2 rotate relatively, so that the two clamps 3 apply shear force to the riveted rivet, and the torque sensor 4 detects the torque in real time until the riveting breaks, and the maximum torque value before the break is converted to the maximum shear resistance of the rivet;

[0070] By setting a fixed disk 1 and a movable disk 2 that can rotate relative to each other, and respectively providing a clamp 3 for clamping rivets on the fixed disk 1 and the movable disk 2, the driving component 5 can apply a gradually increasing torque to the movable disk 2 through the clutch 7 and the elastic component 6. By repeatedly disconnecting / connecting the clutch 7, the torque is repeatedly applied to the movable disk 2 until a predetermined time is reached or the rivet breaks, so as to judge the shear fatigue performance of the rivet.

[0071] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0072] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0073] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A drum rivet shear strength test device, characterized in that ,include: A fixed disk (1) and a movable disk (2) arranged coaxially, the movable disk (2) being rotatably connected to the top surface of the fixed disk (1); A plurality of groups of clamps (3), each group of the clamps (3) having two clamps (3) mounted on the fixed plate (1) and the movable plate (2) respectively, each group of two clamps (3) being provided with mounting holes (301), and the mounting holes (301) on each group of the clamps (3) having different diameters; A torque sensor (4), wherein the fixed plate (1) is fixed to a detection end of the torque sensor (4) and is used to detect the torque applied to the fixed plate (1); It also includes a driving component (5) and a bracket (100), the driving component (5) including a motor and a reducer, the reducer is fixed on the bracket (100), and the output end of the motor is connected to the output end of the reducer; The movable disk (2) is also provided with a coaxially arranged elastic component (6) and a clutch (7), the elastic component (6) being connected to the movable disk (2), and the clutch (7) being provided with two ends that can be connected / disconnected; It also includes a locking component, wherein the first end of the clutch (7) is connected to the movable plate (2) or the elastic component (6) via the locking component, and the output end of the reducer is connected to the second end of the clutch (7) via a transmission shaft; When the first end of the clutch (7) is connected to the elastic component (6) via a locking component and the two ends of the clutch (7) are connected, the driving component (5) can apply a gradually increasing torque to the movable disk (2) via the elastic component (6); when the first end of the clutch (7) is connected to the movable disk (2) via a locking component and the two ends of the clutch (7) are connected, the driving component (5) directly drives the movable disk (2) to rotate; The elastic component (6) comprises a limit cover (61) and a rotating disk (62), wherein the limit cover (61) is sleeved on the outside of the rotating disk (62), the limit cover (61) is coaxially fixed on the movable disk (2), the rotating disk (62) is coaxially rotatably connected to the movable disk (2), and two springs (63) arranged along an arc are provided on the inner side of the limit cover (61); The first end of the spring (63) is connected to the limiting cover (61), the second end of the spring (63) is connected to the rotating disk (62), and the rotating disk (62) is connected to the first end of the clutch (7); The inner side wall of the limiting cover (61) is provided with two symmetrically arranged fixed support plates (65), and the first ends of the two springs (63) are respectively connected to the two fixed support plates (65); The rotating disk (62) is provided with two symmetrically arranged movable support plates (64), and the second ends of the two springs (63) are respectively connected to the two movable support plates (64).

2. The drum rivet shear strength testing device according to claim 1, characterized in that: The locking component comprises a flange (71) and a plurality of bolts (8) coaxially fixed to the first end of the clutch (7); a plurality of fixing holes (701) are formed on the flange (71); and the plurality of bolts (8) are respectively installed in the plurality of fixing holes (701); The rotating disk (62) is provided with a plurality of second threaded holes (601) corresponding to the bolts (8), and the movable disk (2) is provided with a plurality of first threaded holes (201) corresponding to the bolts (8); When the bolt (8) is connected to the second threaded hole (601), the first end of the clutch (7) is connected to the rotating disk (62); when the bolt (8) is connected to the first threaded hole (201), the first end of the clutch (7) is connected to the movable disk (2).

3. The drum rivet shear strength testing device according to claim 1, characterized in that: The fixed disk (1) and the movable disk (2) are both provided with a plurality of clamp grooves (101), and the clamps (3) are detachably connected in the clamp grooves (101).

4. The drum rivet shear strength testing device according to claim 3, characterized in that: The clamp (3) comprises two symmetrically arranged clamping plates (31), both clamping plates (31) are provided with semicircular grooves, and the mounting hole (301) is composed of two semicircular grooves.

5. The drum rivet shear strength testing device according to claim 4, characterized in that: A slot (102) is provided on the side wall of the clamp groove (101), and a sliding block (32) corresponding to the slot (102) is provided on the side wall of the clamp plate (31), and the sliding block (32) is slidably inserted into the slot (102).

6. A method for testing the shear strength of drum rivets, using the drum rivet shear strength testing device as described in any one of claims 1 to 5, characterized in that: The following steps are involved: Step S1, installing the rivet, selecting a corresponding group of the clamps (3) according to the diameter of the rivet to be measured, passing the rivet through the mounting holes (301) of the two clamps (3) in the group, and then riveting the rivet to the two clamps (3); Step S2, start testing: Maximum shear resistance test: the locking component is switched to the first end of the clutch (7) and connected to the movable disk (2) through the locking component, the two ends of the clutch (7) are combined, and the driving component (5) applies a torque to the movable disk (2) through the clutch (7), so that the two clamps (3) apply a shear force to the riveted rivet, and the torque sensor (4) detects the torque in real time until the riveting breaks. The maximum torque value before the break is converted into the maximum shear resistance of the rivet; Shear fatigue test: the locking component is switched to the first end of the clutch (7) and connected to the elastic component (6) through the locking component. The two ends of the clutch (7) are combined to drive the clutch (7) to rotate. The elastic stroke of the elastic component (6) is compressed and a gradually increasing torque is applied to the movable disk (2), so that the two clamps (3) apply shear force to the riveted rivet, and the torque sensor (4) detects the torque in real time. When the torque reaches a preset value F, the two ends of the clutch (7) are disconnected and the elastic stroke of the elastic component (6) is reset. When the torque is less than the preset value F, the two ends of the clutch (7) are combined again. The above steps are repeated to repeatedly apply shear force to the rivet until a predetermined time is reached or the rivet breaks, and the shear fatigue performance of the rivet is judged.

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