CN112304546A - Vibration testing device - Google Patents
Vibration testing device Download PDFInfo
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- CN112304546A CN112304546A CN202011181347.2A CN202011181347A CN112304546A CN 112304546 A CN112304546 A CN 112304546A CN 202011181347 A CN202011181347 A CN 202011181347A CN 112304546 A CN112304546 A CN 112304546A
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- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims description 24
- 238000005859 coupling reaction Methods 0.000 claims description 24
- 230000008878 coupling Effects 0.000 claims description 19
- 230000001737 promoting effect Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 230000001133 acceleration Effects 0.000 abstract description 11
- 230000003116 impacting effect Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a vibration testing device which comprises a rack, wherein a guide rod and an impact rod are connected to the rack, a vibration seat is connected to the guide rod in a sliding manner, the impact rod is used for impacting a vibration seat in the sliding process of the vibration seat along the guide rod, a spring is further sleeved on the guide rod and positioned between the vibration seat and the rack, a pushing piece is connected to the vibration seat, a follower is connected to the pushing piece, a driving motor is further connected to the rack, a cam is connected to an output shaft of the driving motor, and the cam is used for pushing the follower to move. The invention can generate larger vibration acceleration, thereby generating great vibration and better meeting the test requirement.
Description
Technical Field
The invention relates to the technical field of vibration testing, in particular to a vibration testing device.
Background
The exhaust gas sensor for the vehicle is a core component of an engine, and in order to ensure the quality of the engine, the exhaust gas sensor needs to be subjected to vibration testing before leaving a factory so as to test whether the sensor has defects or not by simulating extreme conditions during the running of the vehicle, but the existing vibration testing device has small vibration acceleration and cannot generate large vibration, and the testing requirements cannot be met.
Disclosure of Invention
The invention aims to provide a vibration testing device which can generate large vibration acceleration to generate great vibration and can better meet the testing requirement.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the utility model provides a vibration testing device, includes the frame, be connected with guide bar and impact bar in the frame, can be connected with the vibration seat on the guide bar with sliding, the impact bar is used for the vibration seat is followed the in-process of sliding of guide bar with the striking takes place for the vibration seat, it is equipped with the spring still to overlap on the guide bar, the spring is located the vibration seat with between the frame, be connected with the thrust piece on the vibration seat, be connected with the follower on the thrust piece, still be connected with driving motor in the frame, be connected with the cam on driving motor's the output shaft, the cam is used for promoting the follower motion.
In one embodiment, the vibration seat is provided with a mounting hole, a first rotating shaft is rotatably connected in the mounting hole, one end of the first rotating shaft is connected with a carrier, the other end of the first rotating shaft is connected with a second rotating shaft through a coupler, and the second rotating shaft is connected with a rotating cylinder.
In one embodiment, the coupling is an oldham coupling.
In one embodiment, the follower is connected to the pusher shoe via a central shaft, and the follower is rotatably connected to the central shaft.
In one embodiment, the follower is a roller or a bearing.
In one embodiment, the rack includes a first vertical plate and a second vertical plate, the guide rod is connected between the first vertical plate and the second vertical plate, the impact rod is connected to the first vertical plate, and the spring is located between the vibration seat and the second vertical plate.
In one embodiment, a first sliding hole and a second sliding hole are formed in the vibration seat, the guide rods penetrate through the first sliding hole and the second sliding hole, and the impact rod is arranged between the guide rod in the first sliding hole and the guide rod in the second sliding hole.
In one embodiment, the striking rod is provided with a striking head, and the striking head is provided with a spherical surface.
In one embodiment, the vibration seat is further connected with an impact block, when the impact rod impacts the vibration seat, the impact rod impacts the impact block, the impact block is connected with a threaded rod, and the threaded rod is connected with the vibration seat through threads.
In one embodiment, the cam is provided with a shaft hole, the shaft hole is connected with an output shaft of the driving motor, and the maximum distance between the outer wall of the cam and the axis of the shaft hole is transited through a concave arc part between the minimum distance between the outer wall of the cam and the axis of the shaft hole.
The invention has the following beneficial effects: the vibration testing device can generate larger vibration acceleration, thereby generating great vibration and better meeting the testing requirement.
Drawings
FIG. 1 is a schematic structural diagram of a vibration testing apparatus according to the present invention;
FIG. 2 is a schematic view of another angular configuration of the vibration testing apparatus shown in FIG. 1;
FIG. 3 is a top view of the vibration testing apparatus shown in FIG. 1;
FIG. 4 is a schematic view of the assembly of the coupling, the first shaft and the second shaft;
FIG. 5 is a schematic view of the cam of FIG. 1;
FIG. 6 is a graph of the change in displacement of the follower;
in the figure: 1. the driving motor, 2, a frame, 21, a first vertical plate, 22, a second vertical plate, 3, a guide rod, 4, a striking rod, 41, a striking head, 42, a spherical surface, 5, a vibration seat, 51, a first sliding hole, 52, a second sliding hole, 53, a striking block, 6, a spring, 7, a pushing piece, 8, a follower, 9, a cam, 91, a shaft hole, 92, a concave arc part, 10, a carrier, 11, a first rotating shaft, 12, a coupling, 121, a half coupling, 122, an intermediate disc, 13, a second rotating shaft, 14, a rotating cylinder, 15 and a central shaft.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
As shown in fig. 1-2, the present embodiment discloses a vibration testing apparatus, which includes a frame 2, the frame 2 is connected with a guide rod 3 and an impact rod 4, the guide rod 3 is connected with a vibration seat 5 in a slidable manner, the vibration seat 5 is used for mounting a sensor to be tested, the guide rod 3 is further sleeved with a spring 6, the spring 6 is located between the vibration seat 5 and the frame 2, so that the vibration seat 5 moves towards the impact rod 4 by using the elastic force of the spring 6; a pushing piece 7 is connected to the vibrating seat 5, a follower 8 is connected to the pushing piece 7, a driving motor 1 is further connected to the rack 2, and a cam 9 is connected to an output shaft of the driving motor 1;
the impact rod 4 is used for impacting the vibration seat 5 in the sliding process of the vibration seat 5 along the guide rod 3, so that the vibration seat 5 generates larger vibration acceleration.
In one embodiment, the vibration seat 5 is provided with a mounting hole, a first rotating shaft 11 is rotatably connected in the mounting hole, one end of the first rotating shaft 11 is connected with the carrier 10, the other end of the first rotating shaft is connected with a second rotating shaft 13 through a coupler 12, and the second rotating shaft 13 is connected with a rotating cylinder 14.
The carrier 10 is used for mounting a sensor to be measured. Can drive second pivot 13 through revolving cylinder 14 and rotate, second pivot 13 drives first pivot 11 through shaft coupling 12 and rotates for the direction of the sensor that awaits measuring of connecting on the carrier 10 can be adjusted, thereby can carry out vibration test to the different directions of the sensor that awaits measuring. It will be appreciated that at the start of the vibration test, the rotary cylinder 14 stops rotating and the coupling 12 and the first shaft 11 are disconnected.
In one embodiment, as shown in fig. 4, the coupling 12 is an oldham coupling, the oldham coupling is composed of an intermediate disc 122 and two half-couplings 121, the upper end surface of the intermediate disc 122 is provided with a first groove, the lower end surface is provided with a second groove, the first groove and the second groove are perpendicular, the half-couplings 121 are provided with projections, the projection of one half-coupling 121 is inserted into the first groove and can slide along the first groove, and the projection of the other half-coupling 121 is inserted into the second groove and can slide along the second groove. Through the structure of the Oldham coupling, the first rotating shaft 11 and the second rotating shaft 12 can be flexibly displaced relatively, when a vibration test is carried out, the vibration seat 5 and the first rotating shaft 11 move along the guide rod 3, and at the moment, the half coupling 121 positioned at the upper part of the intermediate disk 122 slides along the first sliding groove of the upper end surface of the intermediate disk 122 without interfering with the half coupling 121 and the second rotating shaft 13 at the lower part; in addition, when another direction of the sensor to be tested needs to be tested, the vibration seat 5 only needs to be moved until the upper and lower half-couplings 121 keep coaxial again, and at the moment, the rotary cylinder is started, so that the first rotating shaft 11 can be conveniently driven to rotate, and the sensor to be tested on the carrier 10 rotates to another direction. Through the arrangement of the Oldham coupling, vibration tests in two directions can be quickly carried out on the sensor to be tested.
In one embodiment, follower 8 is connected to pusher shoe 7 via a central shaft 15, and follower 8 is rotatably connected to central shaft 15 so that follower 8 can spin to reduce friction when it contacts cam 9.
In one embodiment, the follower 8 is a roller or a bearing, and the roller and the bearing outer ring can rotate around the central shaft 15, so that the friction generated when the follower 8 and the cam 9 are contacted is better reduced, and the abrasion of the cam 9 is further reduced.
In one embodiment, the frame 2 includes a first vertical plate 21 and a second vertical plate 22, the guide rod 3 is connected between the first vertical plate 21 and the second vertical plate 22, the striking rod 4 is connected to the first vertical plate 21, and the spring 6 is located between the vibrating seat 5 and the second vertical plate 22.
In one embodiment, the vibration seat 5 is provided with a first sliding hole 51 and a second sliding hole 52, the guide rod 3 penetrates through each of the first sliding hole 51 and the second sliding hole 52, and the striking rod 4 is arranged between the guide rod 3 in the first sliding hole 51 and the guide rod 3 in the second sliding hole 52 to enhance the stability of the movement of the vibration seat 5.
In one embodiment, the striking rod 4 is provided with a striking head 41, and the striking head 41 is provided with a spherical surface 42 to protect the vibration seat 5 during striking, so as to prevent the vibration seat 5 from being damaged by striking.
In one embodiment, as shown in fig. 3, an impact block 53 is further connected to the vibration seat 5, and when the impact rod 4 and the vibration seat 5 impact, the impact rod 4 impacts on the impact block 53; the impact block 53 is connected with a threaded rod, and the threaded rod is connected with the vibration seat 5 through threads so as to be conveniently replaced after the impact block 53 is damaged. In addition, through setting up striking piece 53 alone, can avoid vibration seat 5 to take place whole impaired in the repeated striking in-process, can play better guard action to vibration seat 5.
In one embodiment, the impact rod 4 and the frame 2 are connected through threads so as to be convenient to disassemble, and meanwhile, the protruding length of the impact rod 4 can be conveniently adjusted according to actual working conditions. For example, the striker 4 may be a bolt.
In one embodiment, as shown in fig. 5, the cam 9 is provided with a shaft hole 91, the shaft hole 91 is connected with the output shaft of the driving motor 1, and the maximum distance between the outer wall of the cam 9 and the axis of the shaft hole 91 is transited to the minimum distance between the outer wall of the cam 9 and the axis of the shaft hole 91 through a concave arc part 92; to enable a greater instantaneous speed of the oscillating seat 5 to be generated by the concave arc 92.
In one embodiment, the guide bar 3 is removably attached to the frame 2, for example, by a threaded connection or other removable attachment, to facilitate installation and removal.
The working principle of the vibration testing device of the embodiment is as follows: the sensor to be tested is installed on the vibration seat 5, then the cam 9 is driven to rotate through the driving motor 1, after the cam 9 rotates to be in contact with the follower 8, along with the continuous rotation of the cam 9, the cam 9 can push the follower 8 and the pushing piece 9 to move together, so that the pushing piece 9 drives the vibration seat 5 to move and continuously compress the spring 6 until the spring 6 is in the maximum compression state, then the cam 9 continues to rotate, the follower 8 and the cam 9 are suddenly separated, the spring force of the spring 6 is suddenly released, the vibration seat 5 moves reversely until the vibration seat 5 collides with the impact rod 4, the vibration seat 5 stops moving instantly, and the extremely large vibration acceleration is generated, wherein the acceleration is not less than 3000G. When vibration testing needs to be carried out on the sensor to be tested in the other direction, the cam 9 can be rotated, the pushing piece 7 and the vibration seat 5 are pushed by the cam 9 to move together until the axis of the first rotating shaft 11 in the vibration seat 5 is recovered to coincide with the axis of the coupler 12 and the axis of the second rotating shaft 13, the coupler 12 and the first rotating shaft 11 are reconnected, then the cam 9 can be stopped from rotating, the rotating cylinder 14 is started to drive the first rotating shaft 11 to rotate, the sensor to be tested is made to rotate to the other direction, after the direction adjustment of the sensor to be tested is finished, the driving motor 1 can be started, the cam 9 is made to rotate, and the vibration testing is carried out on the sensor to be tested continuously by repeating the processes.
The displacement of the follower 8 during the vibration test is changed as shown in fig. 6, in which the abscissa X is the rotation angle of the cam 9 and the ordinate Y is the displacement of the follower 7.
In the vibration testing process, the following results are obtained according to the law of conservation of energy:
when the vibration seat 5 and the impact rod 4 are in impact contact, the speed v is reduced to 0, at the moment, the compression amount of the impact rod 4 is X, and then
The vibration acceleration a generated by the impact of the vibration seat 5 and the impact rod 4 can be deduced according to the formula as follows:
wherein v is the maximum speed of the vibration seat 5, Δ t is the time difference between the vibration seat 5 starting to move towards the direction of the impact rod 4 under the action of the spring force of the spring 6 until the impact rod 4 is impacted, x is the maximum compression amount of the spring 6 and is determined by the contour curve shape of the cam, K is the elastic coefficient of the spring 6, K is the elastic modulus of the impact rod 4, m is the total mass of the vibration seat and the sensor to be measured,the mass of the vibration seat comprises the vibration seat and a part moving along with the vibration seat, for example, when an Oldham coupling is adopted, the mass of the vibration seat is the sum of the mass of the vibration seat, the first rotating shaft and the upper half coupling.
The existing vibration testing device can generally generate acceleration of about 30G, and the vibration testing device of the embodiment can generate acceleration of more than 3000G, so that great vibration is generated, extreme conditions of a vehicle during running can be better simulated, and whether a sensor has defects or not can be better checked.
The vibration testing device of the embodiment can generate larger vibration acceleration through the matching of the cam 9, the follower 8, the vibration seat 5 and the spring 6, so that great vibration is generated, and the testing requirement can be better met; the whole structure is simple, and the reliability is high.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The utility model provides a vibration testing device, a serial communication port, which comprises a frame, be connected with guide bar and impact bar in the frame, can be connected with the vibration seat on the guide bar with sliding, the impact bar is used for the vibration seat is followed the in-process of sliding of guide bar with the striking takes place for the vibration seat, still the cover is equipped with the spring on the guide bar, the spring is located the vibration seat with between the frame, be connected with the thrust piece on the vibration seat, be connected with the follower on the thrust piece, still be connected with driving motor in the frame, be connected with the cam on driving motor's the output shaft, the cam is used for promoting the follower motion.
2. The vibration testing apparatus of claim 1, wherein the vibration seat has a mounting hole, a first shaft is rotatably connected in the mounting hole, one end of the first shaft is connected to the carrier, the other end of the first shaft is connected to a second shaft through a coupling, and the second shaft is connected to the rotary cylinder.
3. The vibration testing apparatus of claim 2, wherein the coupling is an oldham coupling.
4. A vibration testing apparatus according to claim 1, wherein said follower is connected to said pusher shoe via a central shaft, said follower being rotatably connected to said central shaft.
5. A vibration testing apparatus according to claim 4, wherein the follower is a roller or a bearing.
6. The vibration testing apparatus of claim 1, wherein the frame comprises a first vertical plate and a second vertical plate, the guide bar is connected between the first vertical plate and the second vertical plate, the striker bar is connected to the first vertical plate, and the spring is located between the vibration seat and the second vertical plate.
7. The vibration testing apparatus according to claim 6, wherein the vibration seat is provided with a first sliding hole and a second sliding hole, the guide rod is inserted into each of the first sliding hole and the second sliding hole, and the striking rod is disposed between the guide rod in the first sliding hole and the guide rod in the second sliding hole.
8. The vibration testing apparatus of claim 1, wherein the striker bar is provided with a striking head, the striking head being provided with a spherical surface.
9. The vibration testing apparatus of claim 1, wherein an impact block is further coupled to the vibration base, the impact bar impacts the impact block when the impact bar impacts the vibration base, and a threaded rod is coupled to the impact block and coupled to the vibration base via a thread.
10. The vibration testing apparatus of claim 1, wherein the cam is provided with a shaft hole, the shaft hole is connected with an output shaft of the driving motor, and a concave arc portion is arranged between a position on an outer wall of the cam, which is farthest from an axis of the shaft hole, and a position on an outer wall of the cam, which is farthest from the axis of the shaft hole, and the position on the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011181347.2A CN112304546A (en) | 2020-10-29 | 2020-10-29 | Vibration testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011181347.2A CN112304546A (en) | 2020-10-29 | 2020-10-29 | Vibration testing device |
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| CN112304546A true CN112304546A (en) | 2021-02-02 |
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| CN202011181347.2A Pending CN112304546A (en) | 2020-10-29 | 2020-10-29 | Vibration testing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114147413A (en) * | 2021-12-17 | 2022-03-08 | 深圳泰德激光技术股份有限公司 | Pressing mechanism and high-power steel frame welding equipment for nuclear power |
| CN114279662A (en) * | 2021-12-14 | 2022-04-05 | 北京云迹科技股份有限公司 | Laser radar vibrations testing arrangement |
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| CN114279662A (en) * | 2021-12-14 | 2022-04-05 | 北京云迹科技股份有限公司 | Laser radar vibrations testing arrangement |
| CN114279662B (en) * | 2021-12-14 | 2024-02-09 | 北京云迹科技股份有限公司 | Laser radar vibration testing device |
| CN114147413A (en) * | 2021-12-17 | 2022-03-08 | 深圳泰德激光技术股份有限公司 | Pressing mechanism and high-power steel frame welding equipment for nuclear power |
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Application publication date: 20210202 |
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