CN213277155U - Four-degree-of-freedom simulation seismic platform - Google Patents
Four-degree-of-freedom simulation seismic platform Download PDFInfo
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- CN213277155U CN213277155U CN202022642368.1U CN202022642368U CN213277155U CN 213277155 U CN213277155 U CN 213277155U CN 202022642368 U CN202022642368 U CN 202022642368U CN 213277155 U CN213277155 U CN 213277155U
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Abstract
The utility model discloses a four degree of freedom simulation seismic platform, including last backup pad, the bottom suspension fagging, linear driving mechanism, go up the backup pad, install three earthquake analog unit along circumference interval arrangement between the bottom suspension fagging, earthquake analog unit includes the three degree of freedom hinges, automatic telescopic machanism, single degree of freedom hinge, the one end and the last backup pad of three degree of freedom hinges are connected, the other end is connected with automatic telescopic machanism's one end, automatic telescopic machanism's the other end passes through single degree of freedom hinged joint in the bottom suspension fagging, the bottom suspension fagging is installed on linear driving mechanism, linear motion can be to the bottom suspension fagging under linear driving. The utility model has the advantages of light weight and simple space structure, and is convenient for mass production; the method can effectively simulate the transverse wave and the longitudinal wave in the earthquake process at the same time, and can effectively simulate the influence of the transverse wave of the earthquake with large amplitude displacement, thereby comprehensively and effectively simulating the earthquake.
Description
Technical Field
The utility model discloses earthquake simulation mechanism technical field, concretely relates to platform of simulation earthquake, in particular to platform that can four degrees of freedom simulation earthquakes.
Background
The earthquake is formed by the vibration of a seismogenic source and the propagation of the vibration in the form of earthquake waves. According to the propagation mode of seismic waves, seismic waves are mainly divided into longitudinal waves (P-waves) whose vibration direction coincides with the propagation direction and transverse waves (S-waves) whose vibration direction is perpendicular to the propagation direction, wherein the transverse waves are the main cause of major damage caused by earthquakes. Platforms for simulating earthquakes have received increasing attention and research since 1972 when seismic simulation laboratories at the pacific seismic engineering research center at the berkeley division, university of california, usa had shock tables dedicated to seismic experiments.
At present, a platform for simulating an earthquake is mainly designed and manufactured in a horizontal axial movement mode, but the design structure is complex and is difficult to lighten, and only transverse waves in the earthquake process can be effectively simulated, so that the earthquake cannot be effectively simulated.
In order to solve the above problems, there has been an attempt to effectively simulate the influence of the longitudinal waves of an earthquake by adopting a design based on a Stewart structure and six vibration units, but there is a limitation in that it is difficult to effectively simulate the influence of the transverse waves of an earthquake with a large displacement due to the structural design, and there is a space in which weight reduction and simplification can be performed, so that mass production and manufacturing are facilitated.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that exists among the prior art, the utility model provides a platform that can four degrees of freedom simulation earthquakes.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a four degree of freedom simulation seismic platform, includes backup pad, bottom suspension fagging, linear drive mechanism, go up and install three earthquake analog unit along circumference interval arrangement between backup pad, the bottom suspension fagging, earthquake analog unit includes three degree of freedom hinges, automatic telescopic machanism, single degree of freedom hinge, the one end and the last backup pad of three degree of freedom hinges are connected, and the other end is connected with the one end of automatic telescopic machanism, the other end of automatic telescopic machanism passes through single degree of freedom hinged joint in the bottom suspension fagging, the bottom suspension fagging is installed on linear drive mechanism, and the bottom suspension fagging can be linear motion under linear drive mechanism's.
Further, the seismic units are gradually inclined outward from the upper support plate to the lower support plate.
Further, the seismic units are equally spaced.
Further, linear driving mechanism includes guide rail mount pad, first motor, lead screw, install linear guide on the guide rail mount pad, the guide rail slider is installed to the bottom of backup pad down, the guide rail slider with linear guide sliding fit, the lead screw links to each other with first motor, and can rotate under the drive of first motor, the spiral shell has cup jointed the slip table on the lead screw, the bottom of backup pad down is fixed in on the slip table.
Furthermore, the three-degree-of-freedom composite hinge comprises two mechanisms with single rotational freedom degree, each mechanism with single rotational freedom degree comprises an outer bearing seat and an inner bearing seat, a shaft is mounted on each outer bearing seat, each inner bearing seat is rotatably mounted on the shaft, and the outer bearing seats of the two mechanisms with single rotational freedom degree are mounted in a cross shape in a back-to-back mode through rotating pieces.
Furthermore, the automatic telescopic mechanism comprises a second motor and an electric cylinder, wherein the electric cylinder comprises a cylinder body and a telescopic rod which can be driven by the second motor to stretch and retract relative to the cylinder body.
Furthermore, the extension direction of the linear driving mechanism is consistent with the extension direction of a central axis of a triangle formed by the three single-degree-of-freedom hinges.
Furthermore, reinforcing ribs are further mounted on the bottom surface of the lower supporting plate, the reinforcing ribs are symmetrically arranged on two sides of the linear driving mechanism, and the extending direction of the reinforcing ribs is consistent with the extending direction of two bevel edges of a triangle formed by the three single-degree-of-freedom hinges.
Compared with the prior art, the beneficial effects of the utility model are that:
the four-degree-of-freedom simulation earthquake platform has the advantages of light weight and simple space structure, and is convenient for large-scale production and manufacturing; the utility model discloses a four degrees of freedom simulation seismic platform not only can effectively simulate the transverse wave and the longitudinal wave in the earthquake process simultaneously, can simulate the influence of the earthquake transverse wave that has the displacement volume by a wide margin moreover effectively to can simulate the earthquake comprehensively effectively.
Drawings
FIG. 1 is an isometric view of a four degree-of-freedom simulated seismic platform;
FIG. 2 is an elevation view of a four degree-of-freedom simulated seismic platform;
FIG. 3 is a rear view of a four degree-of-freedom simulated seismic platform;
FIG. 4 is a bottom view of a four degree-of-freedom simulated seismic platform;
FIG. 5 is a top view of a four degree-of-freedom simulated seismic platform;
FIG. 6 is a left side view of a four degree-of-freedom simulated seismic platform;
FIG. 7 is a right side view of a four degree-of-freedom simulated seismic platform.
The labels in the figure are: 1. a single degree of freedom hinge; 2. a lower support plate; 3. a screw rod; 4. a first motor; 5. an upper support plate; 6. a three-degree-of-freedom hinge; 7. an electric cylinder; 8. a second motor; 9. a screw; 10. a linear guide rail; 11. a guide rail mounting seat; 12. and (5) reinforcing ribs.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The embodiment provides a four-degree-of-freedom simulated seismic platform as shown in fig. 1 to 7, which comprises an upper support plate 5, a lower support plate 2 and a linear driving mechanism. The earthquake simulation unit comprises a three-degree-of-freedom hinge 6, an automatic telescopic mechanism and a single-degree-of-freedom hinge 1, wherein one end of the three-degree-of-freedom hinge 6 is connected with the upper supporting plate 5, the other end of the three-degree-of-freedom hinge is connected with one end of the automatic telescopic mechanism, the other end of the automatic telescopic mechanism is connected onto the lower supporting plate 2 through the single-degree-of-freedom hinge 1, the lower supporting plate 2 is installed on the linear driving mechanism, and the lower supporting plate 2 can be driven by the linear driving mechanism to do linear motion.
The four-degree-of-freedom simulation seismic platform of the embodiment realizes the four-degree-of-freedom seismic simulation through the three seismic simulation units arranged at intervals along the circumferential direction and the linear driving mechanism, so that the four-degree-of-freedom simulation seismic platform of the embodiment can effectively simulate the transverse waves and the longitudinal waves in the seismic process at the same time, and can effectively simulate the influence of the transverse waves of the earthquake with large amplitude displacement, thereby comprehensively and effectively simulating the earthquake. The four-degree-of-freedom simulation seismic platform has the advantages of light weight and simple space structure, and is convenient for large-scale production and manufacturing.
In this embodiment, the seismic units are gradually inclined outward from the upper support plate 5 to the lower support plate 2, and the spacing distances of the seismic simulation units are equal.
In this embodiment, linear drive mechanism includes guide rail mount pad 11, first motor 4, lead screw 3, install linear guide 10 on the guide rail mount pad 11, and guide rail slider (not shown in the figure) is installed to the bottom of bottom suspension fagging 2, guide rail slider with linear guide 10 sliding fit, lead screw 3 link to each other with first motor 4, and can rotate under the drive of first motor 4, and the spiral shell has connect slip table (not shown in the figure) on the lead screw 3, and the bottom of bottom suspension fagging 2 is fixed in on the slip table. The linear drive preferably extends in the same direction as the central axis of the triangle formed by the three single-degree-of-freedom hinges 1.
The utility model provides a three degree of freedom compound hinge is the hinge that can realize the rotational motion of three direction, and its concrete structure can reappear as required and select in having the technique. In this embodiment, the preferable structure of the three-degree-of-freedom composite hinge includes two mechanisms with single rotational degree of freedom, each mechanism with single rotational degree of freedom includes an outer bearing seat and an inner bearing seat, a shaft is mounted on the outer bearing seat, the inner bearing seats are rotatably mounted on the shaft, and the outer bearing seats of the two mechanisms with single rotational degree of freedom are mounted back to back in a cross shape through a rotating member. The three-degree-of-freedom composite hinge is high-precision and high-strength and can move greatly, a large rotating space can be provided, rotation deviating from a central axis by not less than 80 degrees can be realized, the composite hinge adopts a combined cross assembly mode and separates the rotating motion in three directions, and therefore the amplitude and the range of three-dimensional motion are greatly increased.
In this embodiment, the automatic telescopic mechanism includes a second motor 8 and an electric cylinder 7, and the electric cylinder 7 includes a cylinder body and a telescopic rod that can be driven by the second motor 8 to extend and retract relative to the cylinder body.
The bottom surface of the lower support plate 2 may be further provided with a reinforcing structure to reinforce the strength of the lower support plate 2. In this embodiment, the bottom surface of the lower support plate 2 is provided with the reinforcing ribs 12 through the screws 9, the reinforcing ribs 12 are symmetrically arranged on both sides of the linear driving mechanism, and the extending direction of the reinforcing ribs 12 is consistent with the extending direction of two oblique sides of a triangle formed by the three single-degree-of-freedom hinges 1.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a four degree of freedom simulation seismic platform, its characterized in that, includes backup pad (5), bottom suspension fagging (2), linear drive mechanism, go up and install three earthquake simulation unit along circumference interval arrangement between backup pad (5), the bottom suspension fagging (2), earthquake simulation unit includes three degree of freedom hinges (6), automatic telescopic machanism, single degree of freedom hinge (1), the one end and the last backup pad (5) of three degree of freedom hinges (6) are connected, and the other end is connected with the one end of automatic telescopic machanism, the other end of automatic telescopic machanism passes through single degree of freedom hinge (1) and connects on bottom suspension fagging (2), bottom suspension fagging (2) are installed on linear drive mechanism, and bottom suspension fagging (2) can be linear motion under linear drive mechanism's drive.
2. A four degree-of-freedom simulated seismic platform according to claim 1 wherein the seismic simulation units are inclined progressively to the outside from the upper support plate (5) to the lower support plate (2).
3. The four degree-of-freedom simulated seismic platform of claim 1, wherein the seismic modeling units are equally spaced.
4. The four-degree-of-freedom simulated seismic platform according to claim 1, wherein the linear driving mechanism comprises a guide rail mounting seat (11), a first motor (4) and a lead screw (3), a linear guide rail (10) is mounted on the guide rail mounting seat (11), a guide rail slider is mounted at the bottom of the lower supporting plate (2), the guide rail slider is in sliding fit with the linear guide rail (10), the lead screw (3) is connected with the first motor (4) and can rotate under the driving of the first motor (4), a sliding table is spirally sleeved on the lead screw (3), and the bottom of the lower supporting plate (2) is fixed on the sliding table.
5. A four degree-of-freedom simulated seismic platform as claimed in claim 1 wherein the three degree-of-freedom compound hinge comprises two mechanisms with a single degree of rotational freedom, the mechanisms with a single degree of rotational freedom comprising an outer bearing mount on which a shaft is mounted and an inner bearing mount on which the inner bearing mount is rotatably mounted, the outer bearing mounts of the two mechanisms with a single degree of rotational freedom back to back in a criss-cross arrangement by way of a rotating member.
6. A four-degree-of-freedom simulated seismic platform according to claim 1, wherein the automatic telescoping mechanism comprises a second motor (8), an electric cylinder (7), and the electric cylinder (7) comprises a cylinder body and a telescopic rod which can be driven by the second motor (8) to telescope relative to the cylinder body.
7. A four-degree-of-freedom simulated seismic platform according to claim 1, wherein the linear driving mechanism extends in the same direction as the central axis of a triangle formed by three single-degree-of-freedom hinges (1).
8. The four-degree-of-freedom simulated seismic platform according to claim 1, characterized in that reinforcing ribs (12) are further mounted on the bottom surface of the lower support plate (2), the reinforcing ribs (12) are symmetrically arranged on two sides of the linear driving mechanism, and the extending direction of the reinforcing ribs is consistent with the extending direction of two oblique sides of a triangle formed by the three single-degree-of-freedom hinges (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022642368.1U CN213277155U (en) | 2020-11-16 | 2020-11-16 | Four-degree-of-freedom simulation seismic platform |
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| CN202022642368.1U CN213277155U (en) | 2020-11-16 | 2020-11-16 | Four-degree-of-freedom simulation seismic platform |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113851023A (en) * | 2021-08-13 | 2021-12-28 | 苏州利凯龙模具有限公司 | Earthquake simulator |
| CN114973903A (en) * | 2022-06-10 | 2022-08-30 | 范莹莹 | Multi-degree-of-freedom simulation platform for intelligent classroom teaching |
| CN115629181A (en) * | 2022-10-09 | 2023-01-20 | 长江大学 | Loess landslide simulation device under combined action of multiple inducing factors |
-
2020
- 2020-11-16 CN CN202022642368.1U patent/CN213277155U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113851023A (en) * | 2021-08-13 | 2021-12-28 | 苏州利凯龙模具有限公司 | Earthquake simulator |
| CN114973903A (en) * | 2022-06-10 | 2022-08-30 | 范莹莹 | Multi-degree-of-freedom simulation platform for intelligent classroom teaching |
| CN115629181A (en) * | 2022-10-09 | 2023-01-20 | 长江大学 | Loess landslide simulation device under combined action of multiple inducing factors |
| CN115629181B (en) * | 2022-10-09 | 2024-02-27 | 长江大学 | Loess landslide analogue means under many evoked factors combined action |
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