A vibration test equipment for small automobile parts

Abstract

The present application relates to the technical field of vibration test equipment, and discloses a vibration test equipment for small automobile parts, which is used to solve the problem of fixing irregular small automobile parts with a fixing fixture, damaging the parts, and difficulty in simulating the load-bearing conditions of small automobile parts. When fixing irregular parts, the fixing strip and the rubber block change their positions with the shape of the parts, thereby increasing the contact area of ​​the rubber block with the irregular parts, preventing the rubber block from making point contact with the parts, and causing damage to the parts; when fixing the parts with a movable fixing strip, the irregular shape of the outer end of the fixing strip squeezes the extrusion rod, changing the resistance value of the resistor strip connected to the electromagnetic column circuit, thereby changing the force of the electromagnetic column to attract the parts, and finally changing the simulation of the electromagnetic column on the load-bearing force of the parts, making the simulation environment closer to the actual situation, and improving the accuracy of the vibration test.

Description

Technical Field

[0001] The present application relates to the technical field of vibration testing equipment, and in particular to a vibration testing equipment for small automobile parts. Background Art

[0002] The vibration test bench simulates the various environments encountered by the product during the manufacturing, assembly, transportation and use stages to identify whether the product can withstand environmental vibration. It is suitable for research, development, quality control and manufacturing in various industries such as electronics, electromechanics, optoelectronics, automobiles, and toys. When performing vibration tests on small automotive parts, the small automotive parts are usually fixed on the vibration bench with a fixture so that they will not be displaced or fall off during the vibration test.

[0003] The fixing fixtures of the vibration test bench are generally of regular shape, while the appearance of some small automobile parts is irregular. When fixing the irregularly shaped small automobile parts, the fixing fixtures of regular shape usually have point contact with the small automobile parts. In the subsequent vibration test, the vibration force of the vibration test bench is suddenly transmitted to the small automobile parts, so that the position where the fixing fixture contacts the small automobile parts will suddenly be subjected to excessive squeezing force, causing the small automobile parts to deform and affecting the fixing effect of the small automobile parts. The subsequent vibration force is difficult to be accurately transmitted to the small automobile parts, thereby affecting the accuracy of the vibration test; and, some small automobile parts are used as load-bearing parts. In actual use, the small automobile parts will support a certain amount of external gravity, but in the simulation process of the vibration test bench, it is difficult to simulate the load-bearing conditions of the small automobile parts, thereby affecting the accuracy of the vibration test. Summary of the invention

[0004] The present application proposes a vibration test equipment for small automobile parts, which has the advantages of preventing damage to irregular small automobile parts during fixation and automatically simulating the load-bearing conditions of small automobile parts. It is used to solve the problem that fixing fixtures for irregular small automobile parts damages parts and it is difficult to simulate the load-bearing conditions of small automobile parts.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a vibration test equipment for small automobile parts, including a box body, an exciter, a vibration table, a fixing device and a control device, a vibration table is provided at the top of the inner wall of the box body, and the vibration table is provided with: a T-shaped ring groove, which is opened at the bottom end of the vibration table; a connecting ring, which is slidably installed in the T-shaped ring groove; a plurality of tension springs, one end of which is fixedly connected to the bottom end of the connecting ring, and the other end is fixedly connected to the box body; a fixed inner ring and a fixed capsule, which are fixedly installed at the top end of the vibration table, and the fixed inner ring is located on the inner side of the fixed capsule, and the fixed capsule is filled with extrusion liquid; a plurality of fixing devices for fixing irregular small automobile parts are installed in an array at the top end of the vibration table, and the fixing devices are used in conjunction with the fixing capsule, and a fastening device for strengthening the fixing effect of the fixing device is fixedly installed on one side of the top end of the box body.

[0006] Furthermore, the top of the vibration table is provided with mounting grooves arranged in a circular array, and the fixing device includes: a fixed cylinder, fixedly installed on the side wall of the mounting groove away from the axis of the vibration table; a fixed frame, fixedly connected to the output end of the fixed cylinder; a plurality of fixing bars, equidistantly inserted into the fixing frame and passing through the fixing frame; a rubber block, fixedly connected to one end of the fixing bar close to the axis of the vibration table; and an elastic ring, the inner wall of which is fixedly connected to one end of the fixing bar away from the axis of the vibration table.

[0007] Furthermore, the fixing device also includes: a fixing groove, which is opened on the fixing frame between two adjacent fixing strips; an electromagnetic block, which is slidingly sealed and installed in the fixing groove, each of which is provided with two electromagnetic blocks, and a negative pressure environment is provided between the two electromagnetic blocks; an inclined groove is opened on the adjacent surfaces of the fixing strips, and the inclined groove is a groove that becomes shallower as it is closer to the axis of the vibration table, and the surface of the electromagnetic block facing the inclined groove is parallel to the inclined surface of the inclined groove; a slip ring is fixedly installed at the center of the bottom end of the vibration table, and the electromagnetic block, the slip ring and the control device are electrically connected.

[0008] Furthermore, the fastening device includes: a slide cylinder, fixedly installed on one side of the top of the box body; a support spring, one end of which is fixedly connected to the slide cylinder; an extrusion rod, fixedly connected to the other end of the support spring and slidably installed in the slide cylinder; a rotating structure for driving the vibration table to rotate is fixedly installed on the inner wall of the box body, and a tension adjustment device for simulating the gravity of automobile parts is installed on the slide cylinder and the vibration table.

[0009] Furthermore, a ball is embedded in one end of the extrusion rod facing the axis of the vibration table, and the ball is tightly attached to the outer wall of the elastic ring.

[0010] Furthermore, the rotating structure includes: a stepper motor, fixedly mounted on one side of the inner wall of the box body; a power gear, fixedly sleeved on the output end of the stepper motor; and a plurality of transmission teeth arranged in a circular array are provided on the side wall of the vibration table, and the transmission teeth are meshed with the power gear.

[0011] Furthermore, the tension adjustment device includes: a resistance bar, embedded and installed on the inner wall of the slide cylinder; a conductor bead, embedded and installed on the side wall of the extrusion rod, and in sliding contact with the resistance bar; an electromagnetic column, fixedly installed in the middle position of the top of the vibration table; the resistance bar, the conductor bead and the electromagnetic column are electrically connected to the control device through a slip ring, and the extrusion rod is connected to an amplitude adjustment device for adjusting the vibration amplitude of the vibration table.

[0012] Furthermore, an adjusting cylinder is fixedly installed between the electromagnetic column and the vibration table, the adjusting cylinder is fixedly installed at the middle position of the top of the vibration table, and the electromagnetic column is fixedly installed at the output end of the adjusting cylinder.

[0013] Furthermore, the amplitude adjustment device includes: a connecting rod, which is L-shaped, including a horizontal rod and a vertical rod, the top end of the vertical rod is fixedly connected to the lower end of the extrusion rod, and the vertical rod passes through the side wall of the slide cylinder, the vertical rod is fixedly connected to the horizontal rod, and the horizontal rod is arranged below the vibration table; an adjustment block, movably connected to the other end of the horizontal rod, the bottom end of the adjustment block is an arc surface with a concave middle, and the adjustment block is located above the output end of the exciter.

[0014] Furthermore, a movable groove is provided on the adjustment block, and the cross bar of the connecting rod is movably inserted into the movable groove of the adjustment block. The height of the movable groove is greater than the maximum amplitude of the vibration table. A limit rod is fixedly installed on the top of the cross bar, and the limit rod is used to prevent the connecting rod from slipping out of the movable groove.

[0015] This application has the following beneficial effects:

[0016] 1. The present application provides a vibration test equipment for small automobile parts. When fixing irregular small automobile parts, the fixing strips and rubber blocks change their positions according to the shape of the small automobile parts, thereby increasing the contact area of ​​the rubber blocks with the irregular small automobile parts, preventing point contact between the rubber blocks and the small automobile parts, which may cause damage to the small automobile parts.

[0017] 2. The present application provides a vibration test equipment for small automobile parts. When the vibration table rotates, the support spring and the extrusion rod press against the elastic ring and the fixing bar, so that the fixing bar is further close to the edge of the small automobile parts, thereby enhancing the fixing effect of the fixing bar on the small automobile parts and preventing the fixing of the small automobile parts by the fixing bar from loosening during vibration.

[0018] 3. The present application provides a vibration test equipment for small automobile parts. When the small automobile parts are fixed by a movable fixing bar, the irregular shape of the outer end of the fixing bar squeezes the extrusion rod, changes the resistance value of the resistor bar connected to the electromagnetic column circuit, thereby changing the force of the electromagnetic column to attract the small automobile parts, and finally changes the simulation of the electromagnetic column on the bearing force of the small automobile parts, so that the simulation environment is closer to the actual situation and the accuracy of the vibration test is improved.

[0019] 4. The present application provides a vibration test equipment for small automobile parts. When the small automobile parts are fixed by a movable fixing bar, the irregular shape of the outer end of the fixing bar squeezes the extrusion rod, so that the extrusion rod drives the amplitude adjustment device to move, and changes the distance between the output end of the exciter and the bottom end of the adjustment block, thereby changing the vibration amplitude, making the simulation environment closer to the actual situation of uncertain amplitude, and further improving the accuracy of the vibration test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute a part of the specification, illustrate the embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0021] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 is a cross-sectional view of the box body of the present invention;

[0024] Figure 3 It is a schematic diagram of the connection of the vibration exciter, the vibration table, the fixing device and the fastening device of the present invention;

[0025] Figure 4 is a cross-sectional view of a fixing device and a fastening device of the present invention;

[0026] Figure 5 For the present invention Figure 4 A magnified view of the local structure at center A;

[0027] Figure 6 It is a connection diagram of the fastening device and the amplitude adjustment device of the present invention.

[0028] In the figure: 1. box; 2. exciter; 3. vibration table; 301. fixed inner ring; 302. fixed capsule; 303. connecting ring; 304. tension spring; 4. fixing device; 401. fixed cylinder; 402. fixing frame; 403. fixing bar; 404. rubber block; 405. elastic ring; 406. fixing groove; 407. electromagnetic block; 408. slip ring; 5. rotating structure; 501. stepping motor; 502. power gear; 503. transmission gear; 6. fastening device; 601. slide cylinder; 602. support spring; 603. extrusion rod; 604. ball; 7. tension adjustment device; 701. resistance bar; 702. conductor bead; 703. electromagnetic column; 8. amplitude adjustment device; 801. connecting rod; 802. adjustment block; 803. moving groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Example 1

[0030] See also Figure 1 and Figure 2 A vibration test equipment for small automobile parts comprises a box 1, an exciter 2, a vibration table 3, a fixing device 4 and a control device. The exciter 2 is fixedly installed in the middle position inside the box 1, and the output end of the exciter 2 faces upward. The top of the inner wall of the box 1 is provided with a vibration table 3, and the bottom end of the vibration table 3 is provided with a T-shaped ring groove. A connecting ring 303 is slidably installed in the T-shaped ring groove. The bottom end of the connecting ring 303 is fixedly connected with a plurality of tension springs 304, and the other end of the tension spring 304 is fixedly connected to the box 1. The top array of the vibration table 3 is provided with a plurality of fixing devices 4 for fixing irregular small automobile parts.

[0031] See also Figure 1 The top of the vibration table 3 is fixedly mounted with an annular and coaxial fixed inner ring 301 and a fixed capsule 302, the fixed inner ring 301 is located inside the fixed capsule 302, and the fixed capsule 302 is filled with extrusion liquid; please refer to Figure 2 and Figure 4The fixing device 4 includes a fixing cylinder 401, a fixing frame 402, a fixing strip 403, a rubber block 404 and an elastic ring 405. The top of the vibration table 3 is provided with mounting grooves arranged in a circular array. The fixing cylinder 401 is fixedly installed on the side wall of the mounting groove away from the axis of the vibration table 3. The output end of the fixing cylinder 401 faces the axis of the vibration table 3. The fixing frame 402 is fixedly connected to the output end of the fixing cylinder 401. The bottom end of the fixing frame 402 is slidably installed in the mounting groove of the vibration table 3. A plurality of fixing strips 403 that penetrate the fixing frame 402 are equidistantly inserted into the fixing frame 402. The end of the fixing strip 403 close to the axis of the vibration table 3 is fixed. A rubber block 404 is connected, and the side walls of two adjacent rubber blocks 404 are tightly attached. The ends of the fixing strips 403 on the fixing devices 4 that are away from the axis of the vibration table 3 are fixedly connected to the same elastic ring 405, and the elastic ring 405 can generate elastic stretching; when the irregular small automobile parts are fixed by the fixing device 4, one side of the irregular small automobile parts is tightly attached to the fixing capsule 302, and the other side of the irregular small automobile parts faces the fixing device 4, and the fixing frame 402 is pushed to move toward the irregular small automobile parts by the fixing cylinder 401, and the fixing frame 402 drives the fixing strips 403 and the rubber blocks 404 to move synchronously, When the rubber block 404 is in close contact with the side wall of the irregular small automobile part, the rubber block 404 and the fixing strip 403 stop moving, and the rubber block 404 that is not in close contact with the side wall of the irregular part continues to move with the fixing frame 402 until all the rubber blocks 404 are in close contact with the side wall of the irregular part, thereby fixing the irregular small automobile part. The fixing strip 403 and the rubber block 404 can move according to the shape of the small automobile part to increase the contact area between the rubber block 404 and the irregular small automobile part, thereby preventing the rubber block 404 from making point contact with the small automobile part, which may cause clamping damage to the small automobile part.

[0032] See also Figure 4 A fixing groove 406 is provided on the fixing frame 402 between two adjacent fixing bars 403, and two electromagnetic blocks 407 are installed in the fixing groove 406 in a sliding seal. There is a negative pressure environment between the two electromagnetic blocks 407, and the negative pressure provides power for the resetting of the electromagnetic blocks 407. An inclined groove is provided on the adjacent surface of the fixing bar 403, and the inclined groove is a groove whose groove is shallower as it is closer to the axis of the vibration table 3. The surface of the electromagnetic block 407 facing the inclined groove is parallel to the inclined surface of the inclined groove; please refer to Figure 2A slip ring 408 is fixedly installed at the center of the bottom end of the vibration table 3, and the electromagnetic block 407, the slip ring 408 and the control device are electrically connected; after the fixing bar 403 and the rubber block 404 fix the irregular parts, the electromagnetic block 407 is energized by the control device, and the two electromagnetic blocks 407 in the same fixing groove 406 generate magnetic repulsion, so that the electromagnetic block 407 slides into the oblique groove of the fixing bar 403, and the electromagnetic block 407 limits the fixing bar 403 to prevent the fixing bar 403 from driving the rubber block 404 to move in the reverse direction, resulting in the loosening of the irregular parts fixed by the rubber block 404.

[0033] See also Figure 2-Figure 4 A fastening device 6 for strengthening the fixing effect of the fixing device 4 is fixedly installed on one side of the top of the box body 1. The fastening device 6 includes a slide 601, a support spring 602, an extrusion rod 603 and a ball 604. The slide 601 is fixedly installed on one side of the top of the box body 1. The slide 601 faces the axis of the vibration table 3. The slide 601 is fixedly connected with the support spring 602. The other end of the support spring 602 is fixedly connected with the extrusion rod 603, and the extrusion rod 603 is slidably installed in the slide 601. The end of the extrusion rod 603 facing the axis of the vibration table 3 is embedded with a ball 604, and the ball 604 is close to the outer wall of the elastic ring 405; please refer to Figure 2 A rotating structure 5 for driving the vibration table 3 to rotate is fixedly installed on the inner wall of the box body 1; after the fixing device 4 fixes the irregular automobile parts, the exciter 2 is started to perform a vibration test. At the same time, the rotating structure 5 drives the vibration table 3 to rotate slowly. In the process of the vibration table 3 driving the fixing device 4 to rotate, the ball 604 always presses against the outer wall of the elastic ring 405. During the vibration experiment, if a rubber block 404 and a fixing bar 403 vibrate and relax with the outer wall of the irregular automobile parts, the elastic force of the support spring 602 pushes the extrusion rod 603 and the ball 604 to press against the elastic ring 405 and the fixing bar 403, so that the fixing bar 403 drives the rubber block 404 to be close to the outer wall of the irregular automobile parts, and fixes the irregular automobile parts to prevent loosening during the vibration process.

[0034] See also Figure 2 and Figure 3 The rotating structure 5 includes a stepper motor 501 and a power gear 502. The stepper motor 501 is fixedly installed on one side of the inner wall of the box body 1. The power gear 502 is fixedly sleeved on the output end of the stepper motor 501. The side wall of the vibration table 3 is provided with a plurality of transmission teeth 503 arranged in a ring array. The transmission teeth 503 are meshed with the power gear 502. When the stepper motor 501 is started, the output end of the stepper motor 501 drives the power gear 502 to rotate, so that the power gear 502 drives the vibration table 3 to rotate as a whole.

[0035] See also Figure 3-Figure 5The slide 601 and the vibration table 3 are provided with a tension adjustment device 7 for simulating the gravity of automobile parts. The tension adjustment device 7 includes a resistor bar 701, a conductor bead 702 and an electromagnetic column 703. The resistor bar 701 is embedded in the inner wall of the slide 601, and the conductor bead 702 is embedded in the side wall of the extrusion rod 603. The conductor bead 702 is in sliding contact with the resistor bar 701; please refer to Figure 3 , an electromagnetic column 703 is fixedly installed at the middle position of the top of the vibration table 3. When the electromagnetic column 703 generates magnetic force, it is used to attract automobile parts to simulate the gravity of automobile parts. The resistor bar 701, the conductor bead 702 and the electromagnetic column 703 are electrically connected to the control device through the slip ring 408; after the fixing device 4 fixes the irregular automobile parts, when the rotating structure 5 drives the vibration table 3 to rotate slowly, the ball 604 always presses against the outer wall of the elastic ring 405. During the vibration experiment, the elastic ring 405 forms an irregular outer edge to push the ball 604 and the extrusion rod 603 on the sliding ring. The cylinder 601 reciprocates. During the movement of the extrusion rod 603, the extrusion rod 603 drives the conductor bead 702 to move, changing the contact position between the conductor bead 702 and the resistor bar 701, thereby changing the resistance value of the resistor bar 701 connected to the circuit of the electromagnetic column 703, and finally changing the current in the electromagnetic column 703, so that the magnetic force generated by the electromagnetic column 703 changes, and the attraction of the electromagnetic column 703 to the automobile parts changes, that is, changing the simulation of the gravity exerted on the automobile parts by the electromagnetic column 703, so that the simulation environment is closer to the actual situation, and the accuracy of the vibration test is improved.

[0036] An adjusting cylinder is fixedly installed between the electromagnetic column 703 and the vibration table 3. The adjusting cylinder is fixedly installed in the middle position of the top of the vibration table 3. The output end of the adjusting cylinder faces upward, and the electromagnetic column 703 is fixedly installed on the output end of the adjusting cylinder. The adjusting cylinder is used to adjust the position of the electromagnetic column 703. When performing vibration tests on automobile parts of different sizes, the vibration cylinder controls the distance between the electromagnetic column 703 and the automobile parts.

[0037] See also Figure 2 and Figure 6The extrusion rod 603 is connected with an amplitude adjustment device 8 for adjusting the vibration amplitude of the vibration table 3. The amplitude adjustment device 8 includes a connecting rod 801 and an adjustment block 802. The connecting rod 801 is L-shaped. The connecting rod 801 includes a cross bar and a vertical bar. The top of the vertical bar is fixedly connected to the lower end of the extrusion rod 603, and the vertical bar passes through the side wall of the slide 601. The vertical bar is fixedly connected to the cross bar. The cross bar is arranged below the vibration table 3. The other end of the cross bar is connected with a movable adjustment block 802. The bottom end of the adjustment block 802 is an arc surface with a concave middle, and the adjustment block 802 is located above the output end of the exciter 2; because the ball 604 is in close contact with the The edge of the elastic ring 405, the irregular outer edge formed by the elastic ring 405 will push the ball 604 and the extrusion rod 603 to move back and forth in the slide 601. During the movement of the extrusion rod 603, the extrusion rod 603 will drive the connecting rod 801 and the adjustment block 802 to move synchronously. Due to the movement of the adjustment block 802, the distance between the top end of the output end of the exciter 2 and the bottom end of the adjustment block 802 changes. When vibration is generated at the output end of the exciter 2, the amplitude transmitted from the output end of the exciter 2 to the bottom end of the adjustment block 802 changes, thereby making the simulation environment closer to the actual situation, further improving the accuracy of the vibration test.

[0038] See also Figure 6 A movable groove 803 is provided on the adjusting block 802, and the cross bar of the connecting rod 801 is movably inserted into the movable groove 803 of the adjusting block 802. The height of the movable groove 803 is greater than the maximum amplitude of the vibration table 3. A limit rod is fixedly installed on the top of the cross bar. The limit rod is used to prevent the connecting rod 801 from slipping out of the movable groove 803.

[0039] The working principle of the embodiment of the present invention is as follows:

[0040] When fixing an irregular small automobile part, firstly, one side of the small automobile part is pressed against the fixing capsule 302, and the fixing frame 402 is pushed toward the other side of the small automobile part by the fixing cylinder 401, and the fixing frame 402 drives the fixing strip 403 and the rubber block 404 to move in the same direction until each rubber block 404 contacts the surface of the irregular small automobile part. At this time, the rubber block 404 and the fixing capsule 302 can contact the surface of the small automobile part, increasing the contact area between the rubber block 404 and the surface of the small automobile part, thereby preventing the small automobile part from being clamped and damaged when the rubber block 404 and the small automobile part are fixed in point contact.

[0041] Furthermore, after the rubber block 404 is in close contact with the surface of the small automobile parts, the electromagnetic block 407 is energized through the control device, and the two electromagnetic blocks 407 in the same fixing groove 406 generate mutually repelling magnetic forces, so that the electromagnetic block 407 moves into the inclined groove of the fixing bar 403, so that the electromagnetic block 407 limits the fixing bar 403, thereby preventing the fixing bar 403 and the rubber block 404 from sliding in the opposite direction during the vibration test, resulting in the loosening of the fixing of the small automobile parts.

[0042] After the fixing device 4 fixes the irregular automobile parts, the exciter 2 is started to perform a vibration test. At the same time, the rotating structure 5 drives the vibration table 3 to rotate slowly, and the vibration table 3 drives the fixing device 4 to rotate synchronously. During the rotation, the elastic force of the support spring 602 supports the extrusion rod 603 and the ball 604, so that the ball 604 always presses against the outer wall of the elastic ring 405. During the vibration test, if a rubber block 404 and a fixing bar 403 and the outer wall of the irregular automobile parts vibrate and relax, the elastic force of the support spring 602 pushes the extrusion rod 603 and the ball 604 to press against the elastic ring 405 and the fixing bar 403, so that the fixing bar 403 drives the rubber block 404 back to the state of being close to the outer wall of the irregular automobile parts. At the same time, the electromagnetic block 407 continues to slide into the inclined groove of the fixing bar 403 to limit the fixing bar 403 and the rubber block 404, so as to fix the irregular automobile parts and prevent them from loosening during the vibration process.

[0043] Since the ball 604 always presses against the outer wall of the elastic ring 405, the irregular outer edge formed by the elastic ring 405 will push the ball 604 and the extrusion rod 603 to move back and forth in the slide 601. During the movement of the extrusion rod 603, the extrusion rod 603 drives the conductor bead 702 to move, changing the contact position between the conductor bead 702 and the resistor bar 701, thereby changing the resistance value of the resistor bar 701 connected to the circuit of the electromagnetic column 703, and finally changing the current in the electromagnetic column 703, so that the magnetic force generated by the electromagnetic column 703 changes, thereby changing the attraction of the electromagnetic column 703 to the automotive parts, that is, changing the simulation of the gravity exerted on the automotive parts by the electromagnetic column 703, so that the simulation environment is closer to the actual situation, and the accuracy of the vibration test is improved.

[0044] Since the ball 604 is in close contact with the edge of the elastic ring 405, the irregular outer edge formed by the elastic ring 405 will push the ball 604 and the extrusion rod 603 to move back and forth in the slide 601. During the movement of the extrusion rod 603, the extrusion rod 603 will drive the connecting rod 801 and the adjustment block 802 to move synchronously. Due to the movement of the adjustment block 802, the distance between the top end of the output end of the exciter 2 and the bottom end of the adjustment block 802 changes. When vibration is generated at the output end of the exciter 2, the amplitude transmitted from the output end of the exciter 2 to the bottom end of the adjustment block 802 changes, thereby making the simulation environment closer to the actual situation of uncertain amplitude, further improving the accuracy of the vibration test.

Claims

1. A vibration test device for small automobile parts, comprising a box (1), an exciter (2), a vibration table (3), a fixing device (4) and a control device, characterized in that: A vibration table (3) is provided at the top end of the inner wall of the box body (1), and the vibration table (3) is provided with: A T-shaped ring groove is provided at the bottom end of the vibration table (3); A connecting ring (303) is slidably mounted in the T-shaped ring groove; A plurality of tension springs (304), one end of which is fixedly connected to the bottom end of the connecting ring (303), and the other end of which is fixedly connected to the box body (1); The fixed inner ring (301) and the fixed capsule (302) are fixedly mounted on the top of the vibration table (3), and the fixed inner ring (301) is located inside the fixed capsule (302), and the fixed capsule (302) is filled with extrusion liquid; A plurality of fixing devices (4) for fixing irregular small automobile parts are installed in an array at the top of the vibration table (3); the fixing devices (4) are used in conjunction with the fixing capsules (302); and a fastening device (6) for strengthening the fixing effect of the fixing devices (4) is fixedly installed on one side of the top of the box body (1); The top of the vibration table (3) is provided with mounting grooves arranged in a circular array, and the fixing device (4) comprises: A fixed cylinder (401) is fixedly mounted on a side wall of the mounting groove away from the axis of the vibration table (3), and an output end of the fixed cylinder (401) faces the axis of the vibration table (3); A fixed frame (402) is fixedly connected to the output end of the fixed cylinder (401), and the bottom end of the fixed frame (402) is slidably mounted in the mounting groove of the vibration table (3); A plurality of fixing strips (403) are inserted into the fixing frame (402) at equal intervals and penetrate the fixing frame (402); A rubber block (404) is fixedly connected to one end of the fixing bar (403) close to the axis of the vibration table (3); The inner wall of the elastic ring (405) is fixedly connected to an end of the fixing strip (403) away from the axis of the vibration table (3); The ends of the fixing strips (403) on the plurality of fixing devices (4) that are away from the axis of the vibration table (3) are fixedly connected to the same elastic ring (405), and the elastic ring (405) can generate elastic stretching; The fixing device (4) further comprises: A fixing groove (406) is provided on the fixing frame (402) between two adjacent fixing strips (403); The electromagnetic block (407) is installed in a sliding seal in the fixed groove (406), two electromagnetic blocks (407) are arranged in each fixed groove (406), and a negative pressure environment is provided between the two electromagnetic blocks (407), and the negative pressure provides power for resetting the electromagnetic block (407); An oblique groove is provided on a surface adjacent to the fixing strip (403), wherein the oblique groove is a groove whose depth decreases as it approaches the axis of the vibration table (3), and the surface of the electromagnetic block (407) facing the oblique groove is parallel to the inclined surface of the oblique groove; A slip ring (408) is fixedly installed at the center of the bottom end of the vibration table (3), and the electromagnetic block (407), the slip ring (408) and the control device are electrically connected; The electromagnetic block (407) is energized by the control device, and the two electromagnetic blocks (407) in the same fixed groove (406) generate magnetic repulsion, so that the electromagnetic block (407) slides into the inclined groove of the fixed bar (403), and the electromagnetic block (407) limits the fixed bar (403); The fastening device (6) comprises: A slide cylinder (601) is fixedly mounted on one side of the top end of the box body (1); A support spring (602), one end of which is fixedly connected to the slide cylinder (601); The extrusion rod (603) is fixedly connected to the other end of the support spring (602) and slidably mounted in the slide cylinder (601); A ball (604) is embedded in one end of the extrusion rod (603) facing the axis of the vibration table (3), and the ball (604) is tightly attached to the outer wall of the elastic ring (405); A rotating structure (5) for driving the vibration table (3) to rotate is fixedly mounted on the inner wall of the box body (1), and a tension adjustment device (7) for simulating the gravity of automobile parts is mounted on the slide cylinder (601) and the vibration table (3); The tension adjustment device (7) comprises: The resistance bar (701) is embedded and installed on the inner wall of the slide cylinder (601); The conductor bead (702) is embedded in the side wall of the extrusion rod (603) and is in sliding contact with the resistance bar (701); The electromagnetic column (703) is fixedly mounted at the middle position of the top of the vibration table (3); The resistance strip (701), the conductor bead (702) and the electromagnetic column (703) are electrically connected to the control device via a slip ring (408), and the extrusion rod (603) is connected to an amplitude adjustment device (8) for adjusting the vibration amplitude of the vibration table (3).

2. The vibration test equipment for small automobile parts according to claim 1, characterized in that: The rotating structure (5) comprises: A stepper motor (501) is fixedly mounted on one side of the inner wall of the box (1); A power gear (502) is fixedly sleeved on the output end of the stepping motor (501); A plurality of transmission teeth (503) arranged in a ring array are provided on the side wall of the vibration table (3), and the transmission teeth (503) are meshed with the power gear (502).

3. The vibration test equipment for small automobile parts according to claim 1, characterized in that: An adjusting cylinder is fixedly mounted between the electromagnetic column (703) and the vibration table (3); the adjusting cylinder is fixedly mounted at a middle position of the top end of the vibration table (3); and the electromagnetic column (703) is fixedly mounted at the output end of the adjusting cylinder.

4. The vibration test equipment for small automobile parts according to claim 3, characterized in that: The amplitude adjustment device (8) comprises: The connecting rod (801) is L-shaped and comprises a horizontal rod and a vertical rod, wherein the top end of the vertical rod is fixedly connected to the lower end of the extrusion rod (603), and the vertical rod penetrates the side wall of the slide cylinder (601), and the vertical rod is fixedly connected to the horizontal rod, and the horizontal rod is arranged below the vibration table (3); The adjusting block (802) is movably connected to the other end of the crossbar, the bottom end of the adjusting block (802) is an arc surface with a concave middle, and the adjusting block (802) is located above the output end of the vibrator (2).

5. The vibration test equipment for small automobile parts according to claim 4, characterized in that: The adjusting block (802) is provided with a movable groove (803), and the cross bar of the connecting rod (801) is movably inserted into the movable groove (803) of the adjusting block (802). The height of the movable groove (803) is greater than the maximum amplitude of the vibration table (3). A limit rod is fixedly installed at the top end of the cross bar, and the limit rod is used to prevent the connecting rod (801) from sliding out of the movable groove (803).

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