Load vibration test bench for production and processing of automobile fasteners

Abstract

The invention relates to the field of vibration testing, in particular to a load vibration test bench for production and processing of automobile fasteners, which comprises a shell. A spherical groove is formed in the shell, a swing frame is rotationally arranged in the spherical groove around the circle center of the spherical groove, the included angle between the upper end face of the swing frame and the horizontal plane is an acute angle when the swing frame rotates, a lifting frame is movably arranged on the swing frame in the height direction of the swing frame, and a fastener is installed on the lifting frame. According to the invention, two kinds of simulated vibration are combined with each other, so that the test environment of the fastener is more simulated, and the accuracy of the load vibration test result of the fastener is ensured.

Description

Technical Field

[0001] The invention relates to the field of vibration testing, in particular to a load vibration test bench for producing and processing automobile fasteners. Background Art

[0002] Bolts are one of the most common fasteners in automobile fastening. After the bolts are produced, they need to be tested to ensure that they meet the production standards. When testing automobile fastening bolts, most testing devices only test the appearance of the bolts, and ensure whether the bolts meet the production standards by observing whether there are defects such as defects on the outside of the bolts. The testing device cannot test the fastening effect of the bolt threads, which greatly reduces the accuracy of the test results. Defective products are prone to appear in the bolts, which will affect the production quality of the automobile.

[0003] Chinese patent announcement number CN220625683U discloses a bolt detection device for automotive fasteners, including a detection box, a vibration plate and a fixed plate, first sliding components are installed at both ends of the detection box, and a vibration plate is slidably installed on the inner side of the first sliding component, a vibration motor is installed at one end of the top of the vibration plate, and both ends of the top of the vibration plate are provided with through openings, a U-shaped plate is installed at the bottom of the vibration plate, and a second electric telescopic rod is installed at the middle position of the bottom of the U-shaped plate, third sliding components are installed at both ends of the top of the U-shaped plate, and a sliding plate is slidably installed on the top of the third sliding component, the sliding plates all pass through the through openings, and bolt clamps are installed on the top of the sliding plates A plate, a fixed plate is installed at one end of the detection box away from the vibration motor, and a second sliding assembly is installed at one end of the fixed plate close to the detection box, a lifting plate is slidably installed at one end of the second sliding assembly away from the fixed plate, and a servo motor is installed on the top of the lifting plate, a mounting plate is installed on the top of the fixed plate, and a first electric telescopic rod is installed on the top of the mounting plate, the output end of the first electric telescopic rod passes through the mounting plate, and the output end of the first electric telescopic rod is connected to the lifting plate, a control panel is installed on the top of one end of the detection box away from the fixed plate, and the output end of the control panel is electrically connected to the input ends of the vibration motor, the servo motor, the first electric telescopic rod and the second electric telescopic rod through wires.

[0004] Although the above scheme can complete the automatic installation of fasteners, it still has the following problems. First, when the nut is directly set on the turntable, when faced with a long bolt, the nut cannot be completely tightened with the bolt, which has a great impact on the subsequent test results. Secondly, in the process of vibration testing, only setting a vibration motor for vibration has limitations, and it is impossible to simulate the vibration caused by bumps in the car during driving, which leads to differences between the test results and the actual results. Summary of the invention

[0005] In view of the above problems, a load vibration test bench for the production and processing of automobile fasteners is provided. A spherical groove is arranged inside a shell, and a swing frame is rotatably arranged in the spherical groove, so that the swing frame can rotate around the center of the spherical groove. The swing frame swings during the rotation, and the swing angle of the swing frame is an acute angle, thereby simulating the vibration force generated on the fasteners due to the shaking of the automobile during normal driving. While the swing frame is swinging, the lifting frame can also reciprocate along the height direction of the swing frame, so that the lifting frame can simulate the vibration generated on the fasteners due to the ups and downs of the automobile when passing through a bumpy road. The present invention combines the two simulated vibrations with each other, so that the test environment of the fasteners is more realistic, thereby ensuring the accuracy of the fastener load vibration test results.

[0006] In order to solve the problems of the prior art, the present invention provides a load vibration test bench for the production and processing of automobile fasteners, comprising an outer shell; a spherical groove is arranged inside the outer shell, and a swing frame is arranged in the spherical groove to rotate around the center of the spherical groove, and the angle between the upper end surface of the swing frame and the horizontal plane when the swing frame rotates is an acute angle, and a lifting frame is arranged on the swing frame to move along the height direction of the swing frame, and the fasteners are installed on the lifting frame.

[0007] Preferably, a toggle unit for pressing the lifting frame downward along the height direction of the swing frame at a fixed frequency is provided on the swing frame, and a reset unit for driving the lifting frame to rise and reset after being pressed is provided below the lifting frame.

[0008] Preferably, the reset unit includes a support plate that supports the bottom of the lifting frame and can move along the height direction of the swing frame. A weight is arranged on one side of the support plate. A connecting rope that fixes the weight and the support plate is arranged between the weight and the support plate. A support wheel is rotatably arranged below the connecting rope, and the connecting rope is wound around the support wheel.

[0009] Preferably, the toggle unit comprises a plurality of toggle rods arranged in a circular structure array, and a first rotary driver for driving the circular structure to rotate is provided at an end of the circular structure.

[0010] Preferably, a rotating wheel is rotatably provided at the contact position between the lifting frame and the toggle unit, and the rotating wheel is rotatably matched with the end of the toggle rod.

[0011] Preferably, an extension rod is fixedly provided on the upper part of the support plate along the height direction of the swing frame, and a fixed sleeve is fixedly provided on the lifting frame along the extension direction of the extension rod. The extension rod extends into the fixed sleeve and slidably cooperates with the fixed sleeve, and a switch valve is provided at the upper end of the fixed sleeve which is closed when the extension rod completely slides into the fixed sleeve.

[0012] Preferably, a driving unit for driving the swing frame to swing is provided on the side wall of the spherical groove, and the driving unit includes a driving wheel that moves along the radial direction of the spherical groove, the driving wheel rotates around its own axis and the axis is parallel to the horizontal plane, and a vertical body is fixedly provided at the lower part of the swing frame along the axis of the swing frame.

[0013] Preferably, a limit ring is provided in the spherical groove below the swing frame, the axis of the limit ring is colinear with the axis of the swing frame in a horizontal state, and the vertical body that swings with the swing frame is located in the limit ring.

[0014] Preferably, a plurality of electromagnets are evenly and fixedly arranged on the inner ring of the limiting ring around the axis of the limiting ring, the electromagnets are intermittently energized in sequence after the driving unit is running, and the vertical body is made of ferromagnetic material.

[0015] Preferably, a first traction machine is provided at the bottom of the shell, a first traction rope is wound inside the first traction machine, and one end of the first traction rope is fixedly connected to the pituitary body.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a spherical groove inside the shell, and a swing frame is rotatably provided in the spherical groove, so that the swing frame can rotate around the center of the spherical groove, and the swing frame swings during the rotation, and the swing angle of the swing frame is an acute angle, thereby simulating the vibration force generated on the fastener due to the shaking of the car during normal driving. While the swing frame is swinging, the lifting frame can also reciprocate along the height direction of the swing frame, so that the lifting frame can simulate the vibration generated on the fastener due to the ups and downs of the car when passing through a bumpy road. The present invention combines the two simulated vibrations with each other, so that the test environment of the fastener is more realistic, and the accuracy of the fastener load vibration test results is guaranteed.

[0017] 2. By providing a support plate, a weight, a connecting rope and a supporting wheel, whenever the toggle unit presses the lifting frame, the lifting frame can drive the support plate to descend in the height direction of the swing frame. At this time, the support plate pulls the weight through the connecting rope to make the weight rise. When the toggle unit is out of contact with the lifting frame, the weight provides a lifting force to the support plate through the connecting rope under the action of its own gravity, so that the support plate drives the lifting frame to rise and reset. In this way, the effect of reciprocating movement of the lifting frame in the height direction of the swing frame is achieved. After long-term use, the mass of the weight will not change. Compared with setting a spring at the bottom of the lifting frame, the reset unit structure composed of the support plate, the weight, the connecting rope and the supporting wheel has a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a three-dimensional schematic diagram of a load vibration test bench for producing and processing automobile fasteners.

[0019] Figure 2 The present invention is a side view of a load vibration test bench for producing and processing automobile fasteners.

[0020] Figure 3 The invention is a load vibration test bench for the production and processing of automobile fasteners. Figure 2 Schematic cross-sectional view at AA in the middle.

[0021] Figure 4 The present invention is a cutaway stereoscopic schematic diagram of a load vibration test bench for producing and processing automobile fasteners.

[0022] Figure 5 The invention is a load vibration test bench for the production and processing of automobile fasteners. Figure 4 A local enlarged schematic diagram of point B in the middle.

[0023] Figure 6 The invention is a load vibration test bench for the production and processing of automobile fasteners. Figure 4 A partial enlarged schematic diagram of point C in the middle.

[0024] Figure 7 The present invention is a three-dimensional schematic diagram of a load vibration test bench for producing and processing automobile fasteners with the outer shell removed.

[0025] Figure 8 The present invention is a cross-sectional three-dimensional schematic diagram of a load vibration test bench for producing and processing automobile fasteners with the outer shell removed.

[0026] Fig. 9 The invention is a load vibration test bench for the production and processing of automobile fasteners. Figure 8 A partial enlarged schematic diagram of point D in the middle.

[0027] Fig.10 The present invention is a three-dimensional schematic diagram of a load vibration test bench for producing and processing automobile fasteners with the outer shell and the swing frame removed.

[0028] Fig.11 The invention is a load vibration test bench for the production and processing of automobile fasteners. Fig.10 A partial enlarged schematic diagram of point E in the middle.

[0029] The numbers in the figure are: 1. Shell; 11. Spherical groove; 12. Drive unit; 121. Drive wheel; 122. Moving frame; 123. Linear drive; 124. Second rotary drive; 13. Plumb body; 14. Limiting ring; 15. Electromagnet; 16. First traction machine; 161. First traction rope; 17. Second traction machine; 171. Second traction rope; 18. Clamp; 2. Swing frame; 21. Lifting frame; 211. Rotating wheel; 212. Extension rod; 213. Fixed sleeve; 214. Switch valve; 22. Reset unit; 221. Support plate; 222. Weight; 223. Connecting rope; 224. Support wheel; 23. Toggle unit; 231. Toggle rod; 232. First rotary drive; 3. Fastener. DETAILED DESCRIPTION

[0030] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Reference Figure 1-Figure 3 A load vibration test bench for the production and processing of automobile fasteners, comprising a shell 1; a spherical groove 11 is arranged inside the shell 1, and a swing frame 2 is arranged in the spherical groove 11 to rotate around the center of the spherical groove 11, and the angle between the upper end surface of the swing frame 2 and the horizontal plane when the swing frame 2 rotates is an acute angle, and a lifting frame 21 is arranged on the swing frame 2 to move along the height direction of the swing frame 2, and the fastener 3 is installed on the lifting frame 21.

[0032] In the existing load vibration test of automobile fasteners 3, vibration motors are mostly used to provide the vibration required for the test, but the vibration of the vibration motor has limitations. Since the tested fasteners 3 are mainly used in automobiles, the vibration motor cannot simulate the vibration conditions that occur during the driving process of the automobile, and thus cannot accurately obtain the load vibration results of the fasteners 3. During the driving process of the automobile, two main vibrations are generated. First, when the automobile passes through a pothole, the ups and downs of the automobile wheels will cause the automobile body to move in the vertical direction, and the fasteners 3 set in the automobile can be subjected to vibrations in the height direction of the automobile body; second, when the automobile passes through a pothole section, due to the uneven distribution of potholes, the automobile will sway left and right when passing through the pothole section, and the fasteners 3 set in the automobile will also be subjected to left and right shaking vibrations. The above two vibrations overlap during the driving process of the automobile and act on the fasteners 3 at the same time. The above two vibration modes cannot be achieved only by vibration motors, and there is no equipment in the existing test equipment that can simulate the above two vibrations and is suitable for the load vibration test of fasteners 3.

[0033] In order to avoid the above situation, the present invention redesigns the load vibration test bench so that the load vibration test bench can generate the above two vibrations to the fastener 3 under test at the same time, thereby simulating the vibration influence on the fastener 3 under actual use, and improving the accuracy of subsequent test results. The specific structure and working process of the load vibration test bench are as follows: An opening is vertically opened at the upper part of the shell 1, and the lifting frame 21 enters the shell 1 through the opening on the shell 1. The lifting frame 21 can move along the height direction of the swing frame 2. Before the test starts, the upper end surface of the swing frame 2 is parallel to the horizontal plane. Since the lifting frame 21 is used to place the fastener 3, when the fastener 3 is installed on the lifting frame 21, the lifting frame 21 is located directly above the opening of the shell 1. When the fastener 3 is installed, the lifting frame 21 descends into the swing frame 2 in the vertical direction, and then the swing frame 2 starts to rotate around the center of the spherical groove 11. During the rotation process, an angle is formed between the upper end surface of the swing frame 2 and the horizontal plane, and the angle is less than 90 degrees. The swing frame 2 rotates around the spherical groove 11 is rotated around the center of the circle, so that the swing frame 2 simulates the vibration effect generated when the car shakes left and right when passing through a pothole road. When the car is driving normally, no matter how the car shakes, the shaking angle must be less than 90 degrees, otherwise the car will roll over. The swing angle of the swing frame 2 is less than 90 degrees, which ensures that the swing frame 2 will not swing excessively and deviate from reality during the simulation process, and ensures the accuracy of the test results. During the swinging of the swing frame 2, the lifting frame 21 set on the swing frame 2 moves back and forth along the height direction of the swing frame 2, and the fastener 3 set on the lifting frame 21 rises and falls synchronously with the lifting frame 21, which can simulate the situation that the vehicle vibrates due to bumps. When the swing frame 2 and the lifting frame 21 are running synchronously, the influence of vibration on the fastener 3 under actual use can be simulated.

[0034] A spherical groove 11 is provided inside the housing 1, and a swing frame 2 is rotatably provided in the spherical groove 11, so that the swing frame 2 can rotate around the center of the spherical groove 11, and the swing frame 2 swings during the rotation, and the swing angle of the swing frame 2 is an acute angle, simulating the vibration force generated on the fastener 3 due to the shaking of the car during normal driving. While the swing frame 2 swings, the lifting frame 21 can also reciprocate along the height direction of the swing frame 2, and the lifting frame 21 can simulate the vibration generated on the fastener 3 due to the ups and downs of the car when passing through a bumpy road. The present invention combines the two simulated vibrations with each other, so that the test environment of the fastener 3 is more realistic, and the accuracy of the load vibration test results of the fastener 3 is ensured.

[0035] Reference Figure 8 and Fig.10A toggle unit 23 is provided on the swing frame 2 for pressing the lifting frame 21 down along the height direction of the swing frame 2 at a fixed frequency, and a reset unit 22 is provided below the lifting frame 21 for driving the lifting frame 21 to rise and reset after being pressed down.

[0036] During the test, the lifting frame 21 is located in the swing frame 2, and the toggle unit 23 arranged on the swing frame 2 presses the lifting frame 21 at a fixed frequency, so that the lifting frame 21 descends along the height direction of the swing frame 2. Since the toggle unit 23 will be out of contact with the lifting frame 21 after pressing the lifting frame 21, the reset unit 22 arranged under the lifting frame 21 can drive the lifting frame 21 to reset along the height direction of the swing frame 2, thereby achieving the effect of the lifting frame 21 reciprocating along the height direction of the swing frame 2, so as to simulate the vibration caused by the ups and downs of the car when the car passes through a bumpy road. The reset unit 22 provides a first embodiment. The reset unit 22 is preferably a spring. The spring is arranged on the swing frame 2. Before the test, the lifting frame 21 is placed in the swing frame 2 so that the upper end of the spring supports the lifting frame 21. In this way, when the toggle unit 23 presses the lifting frame 21, the spring will be compressed. When the toggle unit 23 is out of contact with the lifting frame 21, the spring drives the lifting frame 21 to reset from the compressed state. Such a cycle can make the lifting frame 21 continue to reciprocate along the height direction of the swing frame 2. However, due to the needs of the test, the toggle unit 23 needs to toggle the lifting frame 21 multiple times during the test. After the load vibration test bench has been used for a period of time, the spring will age. Long-term compression and resetting will also greatly reduce the life of the spring. Therefore, it is still necessary to optimize the structure of the reset unit 22.

[0037] Reference Fig.11 : The reset unit 22 provides a second embodiment, the reset unit 22 includes a support plate 221 that supports the bottom of the lifting frame 21 and can move along the height direction of the swing frame 2, a weight 222 is arranged on one side of the support plate 221, a connecting rope 223 that fixes the weight 222 and the support plate 221 is arranged between the weight 222 and the support plate 221, a support wheel 224 is rotatably arranged below the connecting rope 223, and the connecting rope 223 is wound around the support wheel 224.

[0038] When the toggle unit 23 is running, the toggle unit 23 presses the lifting frame 21 at a fixed frequency. Whenever the toggle unit 23 presses the lifting frame 21, the lifting frame 21 can drive the support plate 221 to descend along the height direction of the swing frame 2. At this time, the support plate 221 pulls the weight 222 through the connecting rope 223, so that the weight 222 rises. When the toggle unit 23 is out of contact with the lifting frame 21, the weight 222 provides a lifting force to the support plate 221 through the connecting rope 223 under the action of its own gravity, so that the support plate 221 drives the lifting frame 21 to rise and reset. In this way, the lifting frame 21 achieves the effect of reciprocating movement of the lifting frame 21 in the height direction of the swing frame 2. After long-term use, the mass of the weight 222 will not change. Compared with the second embodiment in which a spring is arranged at the lower part of the lifting frame 21, the service life of the reset unit 22 is longer.

[0039] Reference Fig. 9 and Fig.10 The toggle unit 23 includes a plurality of toggle rods 231, which are arranged in a circular structure array. A first rotary driver 232 for driving the circular structure to rotate is provided at the end of the circular structure.

[0040] The first rotary driver 232 is preferably a servo motor. When the first rotary driver 232 is started, the first rotary driver 232 drives the toggle rod 231 to rotate. The extension direction of the toggle rod 231 is parallel to the radial direction of the circular structure. When the lifting frame 21 is placed in the swing frame 2 and supported by the support plate 221, the upper end surface of the lifting frame 21 is located in the rotation area of ​​the toggle rod 231, so that the toggle rod 231 can press the upper end surface of the lifting frame 21 during the rotation process. It is worth noting that in order to ensure that the lifting frame 21 can be smoothly lifted and lowered along the height direction of the swing frame 2, when the lifting frame 21 needs to slide out of the swing frame 2 or slide into the swing frame 2, the toggle rod 231 in the circular structure array is in a state of stopping rotation, and the toggle rod 231 will not extend into the moving area of ​​the lifting frame 21 at this time, so that the lifting frame 21 can slide into or slide into the swing frame 2 smoothly, thereby ensuring that the fastener 3 can be smoothly loaded and unloaded.

[0041] Reference Figure 8 and Fig.10 A rotating wheel 211 is rotatably provided at the contact position between the lifting frame 21 and the toggle unit 23, and the rotating wheel 211 is rotatably matched with the end of the toggle rod 231.

[0042] If the rotating wheel 211 is not provided, when the toggle rod 231 starts to rotate under the drive of the first rotating driver 232, the end of the toggle rod 231 will continuously strike the upper end surface of the lifting frame 21, which will cause wear on the end of the toggle rod 231 and the upper end surface of the lifting frame 21 after long-term use. After the rotating wheel 211 is provided on the upper end surface of the lifting frame 21, the toggle rod 231 contacts the rotating wheel 211 when rotating, and the lifting frame 21 is pressed by the rotating wheel 211 during the rotation of the toggle rod 231. In this way, the rotating wheel 211 can roll with the end of the toggle rod 231, thereby reducing the wear of the end of the toggle rod 231 when pressing the lifting frame 21, and avoiding the wear of the lifting frame 21 when contacting the toggle rod 231.

[0043] Reference Fig.11 An extension rod 212 is fixedly provided on the upper part of the support plate 221 along the height direction of the swing frame 2, and a fixing sleeve 213 is fixedly provided on the lifting frame 21 along the extension direction of the extension rod 212. The extension rod 212 extends into the fixing sleeve 213 and slidably cooperates with the fixing sleeve 213. A switch valve 214 is provided on the upper end of the fixing sleeve 213, which is closed when the extension rod 212 completely slides into the fixing sleeve 213.

[0044] When the toggle unit 23 presses the lifting frame 21, each time the toggle unit 23 loses contact with the lifting frame 21, the weight 222 drives the support plate 221 to rise through the connecting rope 223, and the rising support plate 221 drives the lifting frame 21 to rise synchronously, but the moving distance of the weight 222 is limited. When the support plate 221 rises to the initial position, it stops moving, while the lifting frame 21 driven to rise by the support plate 221 continues to rise under the action of inertia, so that the lifting frame 21 and the support plate 221 lose contact in the process of driving the lifting frame 21 to rise, and when the lifting frame 21 and the support plate 221 contact again, a collision occurs, such as This causes great wear on the lifting frame 21 and the support plate 221. In order to reduce the wear, an extension rod 212, a fixing sleeve 213 and a switch valve 214 are provided. At the beginning of the test, when the lifting frame 21 just slides into the swing frame 2, as the lifting frame 21 descends, the extension rod 212 provided on the support plate 221 can pass through the lifting frame 21 and slide into the fixing sleeve 213. Then the switch valve 214 is closed to perform an air lock on the fixing sleeve 213, so that the support plate 221 and the lifting frame 21 are in a locked state. When the support plate 221 drives the lifting frame 21 to rise, it will not separate from the support plate 221 due to inertia, thereby avoiding the lifting frame 21 and the support plate 221 from colliding with each other.

[0045] Reference Figure 3 , Figure 5 and Figure 7: A driving unit 12 for driving the swing frame 2 to swing is arranged on the side wall of the spherical groove 11, and the driving unit 12 includes a driving wheel 121 that moves along the radial direction of the spherical groove 11. The driving wheel 121 rotates around its own axis and the axis is parallel to the horizontal plane. A vertical body 13 is fixedly arranged at the lower part of the swing frame 2 along the axis of the swing frame 2.

[0046] The driving unit 12 also includes a moving frame 122 and a linear driver 123. The driving wheel 121 is rotatably set on the moving frame 122. A linear driver 123 for driving the moving frame 122 to move in a horizontal direction is horizontally set on one side of the moving frame 122. A second rotating driver 124 for driving the driving wheel 121 is set on the moving frame 122. When driving the swing frame 2 to swing, the linear driver 123 first drives the moving frame 122 to move in a horizontal direction, so that the driving wheel 121 rotatably set on the moving frame 122 contacts the swing frame 2, and then the linear driver 123 drives the moving frame 122 to retract, so that the swing frame 2 can swing. At the same time, the vertical body 13 arranged under the swing frame 2 can provide a swing force for the swing frame 2, ensuring that the swing frame 2 can swing multiple times after being pushed by the driving wheel 121.

[0047] Reference Figure 6 A limit ring 14 is provided in the spherical groove 11 below the swing frame 2 , the axis of the limit ring 14 is colinear with the axis of the swing frame 2 in a horizontal state, and the vertical body 13 that swings with the swing frame 2 is located in the limit ring 14 .

[0048] The restriction of the pituitary body 13 by the limiting ring 14 can avoid the swing frame 2 from swinging too much during the swinging process, thereby preventing the swing frame 2 from being inverted.

[0049] Reference Figure 6 : A plurality of electromagnets 15 are evenly and fixedly arranged on the inner ring of the limiting ring 14 around the axis of the limiting ring 14. The electromagnets 15 are intermittently energized in sequence after the driving unit 12 is running. The pituitary 13 is made of ferromagnetic material.

[0050] A plurality of electromagnets 15 are arranged on the limit ring 14, and the electromagnets 15 are energized in sequence after the driving unit 12 is running, so that the swing frame 2 can swing at multiple angles when swinging, that is, the position of the driving unit 12 is fixed, and when the driving wheel 121 drives the swing frame 2 to swing, the swing direction of the swing frame 2 is also fixed. After the electromagnets 15 are arranged, the electromagnets 15 are energized in sequence, and the electromagnets 15 energized in sequence can generate an adsorption force on the pituitary 13 and make the pituitary 13 rotate around the vertical axis of the spherical groove 11, so that the swing frame 2 can be driven to rotate around the vertical axis of the spherical groove 11. Moreover, since the electromagnets 15 are intermittently energized, when all the electromagnets 15 are powered off, the pituitary 13 is driven to swing under the dual force of the rotation force and the swing force, and the swing amplitude becomes smaller and smaller. However, the swing frame 2 can also rotate around the vertical axis of the spherical groove 11 while swinging, thus avoiding the problem of a single swing angle of the swing frame 2.

[0051] Reference Figure 3 , Figure 4 and Figure 6 A first traction machine 16 is provided at the bottom of the housing 1 , a first traction rope 161 is wound inside the first traction machine 16 , and one end of the first traction rope 161 is fixedly connected to the pituitary 13 .

[0052] When the swing frame 2 is in a swinging state, the first traction machine 16 releases the first traction rope 161 to prevent the first traction rope 161 from limiting the swing frame 2, causing the swing frame 2 to be unable to swing normally. When the test is completed, the first traction machine 16 tightens the first traction rope 161, so that the pituitary 13 is pulled to a vertical state by the first traction rope 161. At this time, the upper end surface of the swing frame 2 is in a horizontal state, thereby facilitating the subsequent ascent of the lifting frame 21. A second traction machine 17 is arranged above the shell 1, and a second traction rope 171 is wound inside the second traction machine 17. The end of the second traction rope 171 is fixedly connected to the upper end of the lifting frame 21, so that the lifting frame 21 can not only swing synchronously with the swing frame 2, but also move in the vertical direction and slide in or out of the opening of the shell 1 during the process of loading and unloading. In order to ensure the stability of the swing frame 2 in the initial state, after the first traction rope 161 is tightened by the first traction machine 16, a plurality of clamping members 18 that can clamp the swing frame 2 are further arranged on the side wall of the spherical groove 11. The clamping members 18 move in the radial direction of the spherical groove 11. The driving structure for driving all the clamping members 18 to move synchronously in the radial direction of the spherical groove 11 is a prior art and will not be repeated here.

[0053] Working principle: before the test begins, the upper end surface of the swing frame 2 is parallel to the horizontal plane. Since the lifting frame 21 is used to place the fastener 3, when the fastener 3 is installed on the lifting frame 21, the lifting frame 21 is located directly above the opening of the shell 1. After the fastener 3 is installed, the lifting frame 21 is vertically lowered into the swing frame 2, and then the swing frame 2 begins to rotate around the center of the spherical groove 11. During the rotation, an angle is formed between the upper end surface of the swing frame 2 and the horizontal plane, and the angle is less than 90 degrees. By rotating the swing frame 2 around the center of the spherical groove 11, the swing frame 2 simulates the situation when a car passes through a pothole road. The vibration effect produced when the vehicle shakes left and right is that when the vehicle is driving normally, no matter how the vehicle shakes, the shaking angle must be less than 90 degrees, otherwise the vehicle will roll over. In this way, the swing angle of the swing frame 2 is less than 90 degrees, which ensures that the swing frame 2 will not swing excessively and deviate from reality during the simulation process, and ensures the accuracy of the test results. During the swinging of the swing frame 2, the lifting frame 21 arranged on the swing frame 2 moves back and forth along the height direction of the swing frame 2, and the fastener 3 arranged on the lifting frame 21 rises and falls synchronously with the lifting frame 21, so that the vehicle can be simulated to vibrate due to bumps. When the swing frame 2 and the lifting frame 21 are running synchronously, the influence of vibration on the fastener 3 under actual use can be simulated.

[0054] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A load vibration test bench for the production and processing of automotive fasteners, comprising a housing (1); It is characterized in that A spherical groove (11) is provided inside the housing (1), a swing frame (2) is provided in the spherical groove (11) to rotate around the center of the spherical groove (11), an angle between an upper end surface of the swing frame (2) and a horizontal plane when the swing frame (2) rotates is an acute angle, a lifting frame (21) is provided on the swing frame (2) to move along the height direction of the swing frame (2), and a fastener (3) is mounted on the lifting frame (21).

2. A load vibration test bench for automobile fastener production and processing according to claim 1, characterized in that: A toggle unit (23) is provided on the swing frame (2) for pressing the lifting frame (21) downward along the height direction of the swing frame (2) at a fixed frequency, and a reset unit (22) is provided below the lifting frame (21) for driving the lifting frame (21) to rise and reset after being pressed.

3. A load vibration test bench for automobile fastener production and processing according to claim 2, characterized in that: The reset unit (22) comprises a support plate (221) that supports the bottom of the lifting frame (21) and can move along the height direction of the swing frame (2); a weight (222) is arranged on one side of the support plate (221); a connecting rope (223) is arranged between the weight (222) and the support plate (221) to fixedly connect the two; a supporting wheel (224) is rotatably arranged below the connecting rope (223), and the connecting rope (223) is wound around the supporting wheel (224).

4. A load vibration test bench for automobile fastener production and processing according to claim 2, characterized in that: The toggle unit (23) comprises a plurality of toggle rods (231), the plurality of toggle rods (231) being arranged in a circular structure array, and a first rotation driver (232) for driving the circular structure to rotate is provided at the end of the circular structure.

5. A load vibration test bench for automobile fastener production and processing according to claim 4, characterized in that: A rotating wheel (211) is rotatably provided at a contact position between the lifting frame (21) and the toggle unit (23), and the rotating wheel (211) is rotatably matched with an end of the toggle rod (231).

6. A load vibration test bench for automobile fastener production and processing according to claim 3, characterized in that: An extension rod (212) is fixedly arranged on the upper part of the support plate (221) along the height direction of the swing frame (2), and a fixing sleeve (213) is fixedly arranged on the lifting frame (21) along the extension direction of the extension rod (212). The extension rod (212) extends into the fixing sleeve (213) and slidably cooperates with the fixing sleeve (213). The upper end of the fixing sleeve (213) is provided with a switch valve (214) which is closed when the extension rod (212) completely slides into the fixing sleeve (213).

7. A load vibration test bench for automobile fastener production and processing according to claim 1, characterized in that: A driving unit (12) for driving the swing frame (2) to swing is arranged on the side wall of the spherical groove (11), the driving unit (12) comprising a driving wheel (121) moving along the radial direction of the spherical groove (11), the driving wheel (121) rotating around its own axis and the axis is parallel to the horizontal plane, and a vertical body (13) is fixedly arranged at the bottom of the swing frame (2) along the axis of the swing frame (2).

8. A load vibration test bench for automobile fastener production and processing according to claim 7, characterized in that: A limit ring (14) is arranged in the spherical groove (11) below the swing frame (2); the axis of the limit ring (14) is colinear with the axis of the swing frame (2) in a horizontal state; and the vertical body (13) that swings with the swing frame (2) is located within the limit ring (14).

9. A load vibration test bench for automobile fastener production and processing according to claim 8, characterized in that: A plurality of electromagnets (15) are evenly and fixedly arranged on the inner ring of the limiting ring (14) around the axis of the limiting ring (14); the electromagnets (15) are energized intermittently and sequentially after the driving unit (12) is running; and the vertical body (13) is supported by a ferromagnetic material.

10. A load vibration test bench for automobile fastener production and processing according to claim 1, characterized in that: A first traction machine (16) is arranged at the bottom of the housing (1), a first traction rope (161) is wound inside the first traction machine (16), and one end of the first traction rope (161) is fixedly connected to the pituitary body (13).

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