A load vibration test bench for the production and processing of automotive fasteners

Abstract

The present invention relates to the field of vibration testing, and more particularly to a load vibration test bench for the production and processing of automotive fasteners, including a housing; a spherical groove is provided inside the housing, and a swing frame is rotatably arranged around the center of the spherical groove inside the spherical groove. The included angle between the upper end surface of the swing frame and the horizontal plane is an acute angle when the swing frame rotates. A lifting frame is movably arranged along the height direction of the swing frame on the swing frame, and the fastener is installed on the lifting frame. The present invention combines two kinds of simulated vibrations, making the test environment of the fastener more realistic and ensuring the accuracy of the load vibration test results of the fastener.

Description

Technical Field

[0001] The present invention relates to the field of vibration testing, and more particularly to a load vibration test bench for the production and processing of automotive fasteners. Background Art

[0002] Bolts are one of the most common fasteners in automotive fastening. After the production of bolts, it is necessary to detect them to ensure that they meet the production standards. When detecting automotive fastening bolts, most of the detection devices only detect the appearance of the bolts. By observing whether there are defects such as mutilation on the outside of the bolts, it is ensured whether the bolts meet the production standards. The detection devices cannot detect the fastening effect of the bolt threads, which greatly reduces the accuracy of the detection results. Defective products are likely to appear in the bolts, thus affecting the production quality of the automobiles.

[0003] Chinese Patent Publication No. CN220625683U discloses a bolt detection device for automotive fasteners, including a detection box, a vibration plate and a fixing plate. At both ends inside the detection box, first sliding components are installed, and a vibration plate is slidably installed inside the first sliding components. At one end of the top of the vibration plate, a vibration motor is installed, and through holes are provided at both ends of the top of the vibration plate. At the bottom of the vibration plate, a U-shaped plate is installed, and a second electric telescopic rod is installed at the middle position of the bottom of the U-shaped plate. At both ends of the top of the U-shaped plate, third sliding components are installed, and a sliding plate is slidably installed on the top of the third sliding components. The sliding plates all pass through the through holes, and bolt clamping plates are installed on the tops of the sliding plates. At one end of the detection box away from the vibration motor, a fixing plate is installed, and a second sliding component is installed at one end of the fixing plate close to the detection box. At one end of the second sliding component away from the fixing plate, a lifting plate is slidably installed, and a servo motor is installed on the top of the lifting plate. On the top of the fixing plate, a mounting plate is installed, 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. At the top of one end of the detection box away from the fixing plate, a control panel is installed. 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 solution can complete the automatic installation of fasteners, there are still the following several problems. First, when the nut is directly set on the turntable, when facing bolts with longer lengths, the nut cannot be fully fastened to the bolt, which has a greater impact on the subsequent test results. Second, during the vibration test, only setting a vibration motor for vibration has limitations and cannot simulate the vibration situation generated by the bumps during the driving of the automobile, thus resulting in a difference between the test results and the actual situation. 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 provides a second embodiment, 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 drive 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 drive rope, and the drive 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, the driving unit includes a driving wheel moving 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 limiting ring is provided in the spherical groove below the swing frame, the axis of the limiting 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 limiting 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:

[0017] 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.

[0018] 2. By providing a support plate, a weight, a driving rope and a support 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 driving 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 driving rope under the action of its own gravity, so that the support plate drives the lifting frame to rise and reset, thereby achieving the effect of reciprocating movement of the lifting frame in the height direction of the swing frame. 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 driving rope and the support wheel has a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of a load vibration test bench for producing and processing automobile fasteners according to the present invention.

[0020] Figure 2 It is a side view of a load vibration test bench for the production and processing of automotive fasteners according to the present invention.

[0021] Figure 3 It is a Figure 2 Schematic cross-sectional view taken along line A-A in a load vibration test bench for the production and processing of automotive fasteners according to the present invention.

[0022] Figure 4 It is a schematic perspective cross-sectional view of a load vibration test bench for the production and processing of automotive fasteners according to the present invention.

[0023] Figure 5 It is a Figure 4 Schematic enlarged view of the partial area at B in a load vibration test bench for the production and processing of automotive fasteners according to the present invention.

[0024] Figure 6 It is a Figure 4 Schematic enlarged view of the partial area at C in a load vibration test bench for the production and processing of automotive fasteners according to the present invention.

[0025] Figure 7 It is a schematic perspective view of a load vibration test bench for the production and processing of automotive fasteners according to the present invention after removing the outer shell.

[0026] Figure 8 It is a schematic perspective cross-sectional view of a load vibration test bench for the production and processing of automotive fasteners according to the present invention after removing the outer shell.

[0027] Figure 9 It is a Figure 8 Schematic enlarged view of the partial area at D in a load vibration test bench for the production and processing of automotive fasteners according to the present invention.

[0028] Figure 10 It is a schematic perspective view of a load vibration test bench for the production and processing of automotive fasteners according to the present invention after removing the outer shell and the swing frame.

[0029] Figure 11 It is a Figure 10 Schematic enlarged view of the partial area at E in a load vibration test bench for the production and processing of automotive fasteners according to the present invention.

[0030] The reference numerals in the figure are:

[0031] 1. Housing; 11. Spherical groove; 12. Driving unit; 121. Driving wheel; 122. Moving frame; 123. Linear drive; 124. Second rotary drive; 13. Pituitary; 14. Limit ring; 15. Electromagnet; 16. First tractor; 161. First tow rope; 17. Second tractor; 171. Second tow rope; 18. Clamping member; 2. Swing frame; 21. Lifting frame; 211. Rotating wheel; 212. Extension rod; 213. Fixed sleeve; 214. On-off valve; 22. Reset unit; 221. Support plate; 222. Heavy object; 223. Connecting rope; 224. Support wheel; 23. Poking unit; 231. Poking rod; 232. First rotary drive; 3. Fastener. Detailed implementation mode

[0032] To further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation modes.

[0033] Refer to Figures 1-3 : A load vibration test bench for the production and processing of automotive fasteners, including a housing 1; a spherical groove 11 is provided inside the housing 1, and a swing frame 2 is rotatably arranged around the center of the spherical groove 11 in the spherical groove 11. The included angle between the upper end surface of the swing frame 2 and the horizontal plane is an acute angle when the swing frame 2 rotates. An elevator 21 is movably arranged on the swing frame 2 along the height direction of the swing frame 2, and the fastener 3 is installed on the elevator 21.

[0034] In the existing load vibration tests of automotive fasteners 3, most use vibration motors to provide the vibrations required for the tests. However, the vibrations of vibration motors have limitations. Since the tested fasteners 3 are mainly used in automobiles, vibration motors cannot simulate the vibrations that occur during the driving of automobiles. Therefore, the load vibration results of the fasteners 3 cannot be accurately obtained. When an automobile is driving, two main vibrations are generated. First, when the automobile passes through a potholed road surface, the undulation of the automobile wheels will cause the body to move vertically, and the fasteners 3 installed in the automobile can be subjected to vibrations in the height direction of the body. Second, when the automobile passes through a potholed section, due to the uneven distribution of the potholes, the automobile will sway left and right when passing through the potholed section, and the fasteners 3 installed in the automobile will also be subjected to left and right shaking vibrations. The above two vibrations overlap during the driving of the automobile and act on the fasteners 3 at the same time. However, the above two vibration modes cannot be achieved only by vibration motors, and there is no existing test equipment that can simulate the above two vibrations and is suitable for the load vibration test of the fasteners 3.

[0035] To avoid the above situation, the present invention redesigned the load vibration test bench, enabling the load vibration test bench to simultaneously generate the above two kinds of vibrations on the fastener 3 during the test, thereby simulating the vibration effects on the fastener 3 in the actual use state and improving the accuracy of subsequent test results. The specific structure and working process of the load vibration test bench are as follows:

[0036] An opening is vertically provided in the upper part of the outer shell 1. The lifting frame 21 enters the outer shell 1 through the opening on the outer shell 1. The lifting frame 21 can move along the height direction of the swing frame 2. Before the test starts, the upper end face of the swing frame 2 is parallel to the horizontal plane. Since the lifting frame 21 is used to place the fastener 3, when installing the fastener 3 on the lifting frame 21, the lifting frame 21 is located directly above the opening of the outer shell 1. After the fastener 3 is installed, the lifting frame 21 descends vertically into the swing frame 2. Subsequently, the swing frame 2 starts to rotate around the center of the spherical groove 11. During the rotation, an angle is formed between the upper end face 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 vibration effect generated when the vehicle sways left and right when passing through a potholed road surface. Since when the vehicle is driving normally, no matter how the vehicle sways, the swaying angle must be less than 90 degrees, otherwise the vehicle will roll over. Making the swing angle of the swing frame 2 less than 90 degrees ensures that the swing frame 2 will not swing excessively and deviate from the actual situation during the simulation, guaranteeing the accuracy of the test results. During the swing of the swing frame 2, the lifting frame 21 provided on the swing frame 2 reciprocates along the height direction of the swing frame 2, and the fastener 3 provided on the lifting frame 21 moves up and down synchronously with the lifting frame 21, thus simulating the situation where the vehicle vibrates up and down due to bumps. When the swing frame 2 and the lifting frame 21 operate synchronously, the influence of vibration on the fastener 3 in the actual use state can be simulated.

[0037] By providing a spherical groove 11 inside the outer shell 1 and rotatably arranging a swing frame 2 in the spherical groove 11, the swing frame 2 can rotate around the center of the spherical groove 11, and the swing frame 2 swings during the rotation. The swing angle of the swing frame 2 is an acute angle, simulating the vibration force generated on the fastener 3 due to swaying during the normal driving of the vehicle. While the swing frame 2 is swinging, the lifting frame 21 can also reciprocate along the height direction of the swing frame 2. The lifting frame 21 can simulate the vibration generated on the fastener 3 due to the up and down undulation when the vehicle passes through a bumpy road surface. The present invention combines the two simulated vibrations, making the test environment of the fastener 3 more realistic and guaranteeing the accuracy of the load vibration test results of the fastener 3.

[0038] Refer to Figure 8 and Figure 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.

[0039] 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.

[0040] Reference Figure 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 driving rope that fixes the weight 222 and the support plate 221 is arranged between the weight 222 and the support plate 221, and a support wheel 224 is rotatably arranged below the driving rope, and the driving rope is wound around the support wheel 224.

[0041] 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 in the height direction of the swing frame 2. At this time, the support plate 221 pulls the weight 222 through the driving rope, 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 driving rope 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 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.

[0042] Reference Figure 9 and Figure 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.

[0043] 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.

[0044] Reference Figure 8 and Figure 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 .

[0045] 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.

[0046] Reference Figure 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.

[0047] 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 driving rope, 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, there will be a collision, which The lifting frame 21 and the support plate 221 are subject to great wear. 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. In this way, 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, the support plate 221 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.

[0048] 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. The driving unit 12 includes a driving wheel 121 that moves in 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 pituitary 13 is fixedly arranged along the axis of the swing frame 2 at the lower part of the swing frame 2.

[0049] The driving unit 12 further includes a moving frame 122 and a linear driver 123. The driving wheel 121 is rotatably arranged on the moving frame 122. A linear driver 123 for driving the moving frame 122 to move horizontally is horizontally arranged on one side of the moving frame 122. A second rotary driver 124 for driving the driving wheel 121 is arranged 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 horizontally, so that the driving wheel 121 rotatably arranged on the moving frame 122 contacts the swing frame 2. Then the linear driver 123 drives the moving frame 122 to retract. In this way, the swing frame 2 can swing. At the same time, the pituitary 13 arranged below the swing frame 2 can provide a return 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.

[0050] Refer to Figure 6 : A limiting ring 14 is arranged in the spherical groove 11 below the swing frame 2. The axis of the limiting ring 14 is collinear with the axis of the swing frame 2 in the horizontal state. The pituitary 13 that swings with the swing frame 2 is located inside the limiting ring 14.

[0051] Through the restriction of the pituitary 13 by the limiting ring 14, the situation that the swing amplitude of the swing frame 2 is too large during the swinging process is avoided, thereby preventing the swing frame 2 from being inverted.

[0052] Refer to 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 operates. The pituitary 13 is made of ferromagnetic material.

[0053] 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 operates, so that the swing frame 2 can swing at multiple angles when swinging. That is, the position of the driving unit 12 is fixed. When the driving wheel 121 drives the swing frame 2 to swing, the swinging direction of the swing frame 2 is also fixed. After the electromagnets 15 are arranged, the electromagnets 15 are energized in sequence. The sequentially energized electromagnets 15 can generate an adsorption force on the pituitary 13 and make the pituitary 13 rotate around the vertical axis of the spherical groove 11. In this way, the swing frame 2 can be driven to rotate around the vertical axis of the spherical groove 11. And because the electromagnets 15 are intermittently energized, when all the electromagnets 15 are de-energized, the pituitary 13 drives the swing frame 2 to swing under the dual action of the rotational force and the swinging force, and the swinging amplitude becomes smaller and smaller. However, the swing frame 2 can still rotate around the vertical axis of the spherical groove 11 while swinging. In this way, the problem of the single swinging angle of the swing frame 2 is avoided.

[0054] Refer to Figure 3 、 Figure 4 and Figure 6 : A first tractor 16 is arranged at the bottom of the housing 1. A first traction rope 161 is wound in the first tractor 16. One end of the first traction rope 161 is fixedly connected to the pituitary 13.

[0055] When the swing frame 2 is in a swinging state, the first tractor 16 releases the first traction rope 161 to prevent the first traction rope 161 from limiting the swing frame 2 and causing the swing frame 2 to swing abnormally. After the test is over, the first tractor 16 tightens the first traction rope 161, so that the pituitary 13 is pulled by the first traction rope 161 to the vertical state. At this time, the upper end surface of the swing frame 2 is in a horizontal state, which is convenient for the subsequent lifting of the lifting frame 21. A second tractor 17 is arranged above the housing 1. A second traction rope 171 is wound in the second tractor 17. The end of the second traction rope 171 is fixedly connected to the upper end of the lifting frame 21. In this way, the lifting frame 21 can swing synchronously with the swing frame 2 and can also move vertically and slide into or out of the opening of the housing 1 during the process of feeding and discharging. 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 tractor 16, a plurality of clamping members 18 for clamping the swing frame 2 are further arranged on the side wall of the spherical groove 11. The clamping members 18 move along the radial direction of the spherical groove 11. The driving structure for driving all the clamping members 18 to move synchronously along the radial direction of the spherical groove 11 is the prior art and will not be described in detail here.

[0056] Working principle: Before the experiment 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 installing the fastener 3 on the lifting frame 21, the lifting frame 21 is directly above the opening of the housing 1. After the installation of the fastener 3 is completed, the lifting frame 21 descends vertically into the swing frame 2, and then the swing frame 2 starts 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 vibration effect generated when the car sways left and right when passing through a potholed road surface. Since when the car is driving normally, no matter how the car sways, the swaying angle must be less than 90 degrees, otherwise the car will roll over. Thus, the swing angle of the swing frame 2 is less than 90 degrees, ensuring that the swing frame 2 will not swing excessively and deviate from the actual situation during the simulation, and ensuring the accuracy of the test results. During the swinging of the swing frame 2, the lifting frame 21 provided on the swing frame 2 reciprocates in the height direction of the swing frame 2, and the fastener 3 provided on the lifting frame 21 moves up and down synchronously with the lifting frame 21. In this way, the situation of the vehicle vibrating up and down due to bumps can be simulated. When the swing frame 2 and the lifting frame 21 operate synchronously, the influence of vibration on the fastener 3 under the actual use state can be simulated.

[0057] The above embodiments only represent one or several implementation manners of the present invention. The description is relatively specific and detailed, but it cannot be construed as a limitation on the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended 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 in a height direction of the swing frame (2), and a fastener (3) is mounted on the lifting frame (21); 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 down; The reset unit (22) comprises a support plate (221) that supports the bottom of the lifting frame (21) and is movable in the height direction of the swing frame (2); a weight (222) is arranged on one side of the support plate (221); a drive rope that fixedly connects 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 drive rope, and the drive rope is wound around the support wheel (224).

2. The load vibration test bench for the production and processing of automotive fasteners according to claim 1, 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.

3. The load vibration test bench for the production and processing of automotive fasteners according to claim 2, 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).

4. A load vibration test bench for the production and processing of automotive fasteners according to claim 1, 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).

5. A load vibration test bench for the production and processing of automotive fasteners 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).

6. The load vibration test bench for the production and processing of automotive fasteners according to claim 5, 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).

7. The load vibration test bench for the production and processing of automotive fasteners according to claim 6, 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.

8. A load vibration test bench for the production and processing of automotive fasteners according to claim 1, characterized in that, A first tractor (16) is provided at the bottom of the outer shell (1). A first towing rope (161) is wound inside the first tractor (16), and one end of the first towing rope (161) is fixedly connected to the pituitary body (13).

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