Hinge zeroing structure of vertical pendulum body of seismic instrument

Abstract

The utility model discloses a vertical pendulum body hinge zeroing structure of a seismic instrument. Relates to the seismometer vertical field. The zero position of a vertical pendulum body of an existing seismometer is influenced by factors such as temperature and altitude, so that the zero position of the vertical pendulum body of the seismometer cannot return to the initial position. The device comprises a leaf spring fixing seat and a ground plate, the end part of the leaf spring fixing seat is fixedly connected with a bent leaf spring, the leaf spring fixing seat and the ground plate are provided with a vertical pendulum body hinge zeroing structure, one end of the vertical pendulum body hinge zeroing structure is fixed on the ground plate, and the other end of the vertical pendulum body hinge zeroing structure is fixed on the ground plate. The vertical pendulum body hinge zeroing structure adjusts the bending strength of the leaf spring connected to the leaf spring fixing seat, so that the vertical pendulum body hinge zeroing structure adjusts the zero position; the vertical pendulum hinge zeroing structure comprises a screw assembly, a motor, a motor fixing sleeve and a motor base. The end, close to the leaf spring fixing base, of the screw assembly is rotationally connected with the leaf spring fixing base after being hinged, and the end, close to the motor, of the screw assembly is fixedly connected with the motor. The utility model is applied to the seismometer vertical pendulum body field.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of earthquake monitoring, concretely relates to a vertical pendulum body hinge zero setting structure of seismograph. BACKGROUND

[0002] The seismometer is also called a pendulum seismograph, which is a device for converting ground motion into an electrical signal. It is the main component of a seismograph that can record a physical constant of an earthquake. The seismometer directly contacts the ground. When the ground shakes, the internal components will move relative to each other due to inertia, converting the vibration into measurable physical quantities such as displacement, velocity, or acceleration. These physical quantities are then converted into electrical signals by a sensor.

[0003] With the continuous improvement of monitoring technology, people not only pursue higher technical indicators and more comprehensive product characteristics of the seismometer, but also hope that the instrument can be more intelligent and can be remotely maintained at unattended stations. The zero position of the vertical pendulum body of the seismometer is affected by factors such as temperature and altitude. Temperature changes will cause materials to expand and contract. The seismometer pendulum body and its support structure are usually made of metal and other materials. When the temperature changes, the size of these components changes. For example, when the temperature rises, the support part of the pendulum body may become longer or deformed, causing the balance position of the pendulum body, i.e., the zero position, to change. When the temperature drops, the opposite is true. This thermal expansion and contraction changes the original spatial position relationship of the pendulum body, thereby affecting the zero position. At the same time, different altitudes will cause differences in gravitational acceleration. According to the law of universal gravitation, the gravitational force of the earth on an object is related to the distance (related to altitude). The higher the altitude, the smaller the gravitational acceleration. The balance and zero position of the vertical pendulum body of the seismometer are closely related to gravity, and changes in gravitational acceleration will break the balance of the forces acting on the pendulum body (such as elastic restoring force, etc.). Moreover, the level of the platform where the seismometer is installed in the station varies, and errors caused by human installation also affect the zero position of the pendulum body. SUMMARY

[0004] The utility model discloses in order to solve the zero position of the vertical pendulum body of the existing seismometer is affected by factors such as temperature and altitude, therefore, provide a kind of vertical pendulum body hinge zero setting structure of seismograph instrument pendulum zero position that can be adjusted.

[0005] The technical scheme of the utility model is as follows:

[0006] A vertical pendulum body hinge zero setting structure of seismograph instrument, which comprises a leaf spring fixing seat and a ground plate. The end of the leaf spring fixing seat is fixedly connected with a curved leaf spring. A vertical pendulum body hinge zero setting structure is installed between the leaf spring fixing seat and the ground plate. One end of the vertical pendulum body hinge zero setting structure is fixed to the ground plate. The vertical pendulum body hinge zero setting structure adjusts the bending strength of the leaf spring connected to the leaf spring fixing seat, so as to adjust the position of the zero position.

[0007] The vertical pendulum hinge zero setting structure comprises a screw rod assembly, a motor, a motor fixing sleeve and a motor base;

[0008] The screw rod assembly is hingedly connected to the fixed seat of the leaf spring at one end close to the fixed seat of the leaf spring, and is fixedly connected to the motor at the other end close to the motor, so that the screw rod assembly is driven to rotate when the motor rotates; the tail of the motor is fixedly connected to the motor fixing sleeve; the tail of the motor fixing sleeve is hingedly connected to the motor base through a thrust bearing, so that the motor fixing sleeve drives the motor to rotate; and the bottom of the motor base is fixed to the upper plane of the ground plate, so that the motor fixing sleeve is driven to rotate through the thrust bearing when the motor rotates.

[0009] Further, the screw rod assembly comprises an adjusting nut and an adjusting screw rod, the threaded column on the adjusting screw rod is inserted into the threaded hole of the adjusting nut, so that the adjusting nut and the adjusting screw rod are fixedly connected, and the fixed seat of the leaf spring and the motor are connected.

[0010] Further, the adjusting nut is provided with symmetrical insertion columns, the insertion columns of the adjusting nut are connected to the fixed seat of the leaf spring, and a threaded hole is formed in the tail of the adjusting nut for mounting the adjusting screw rod.

[0011] Further, the adjusting screw rod is provided with a threaded column structure, a threaded groove is formed in the tail of the adjusting screw rod, a small threaded rod with external threads is inserted into the threaded groove, a jackscrew hole is formed in the side surface of the threaded groove for penetrating a jackscrew, and the jackscrew is fixed to the rotating head through the jackscrew hole.

[0012] Further, the insertion cylinder of the motor fixing sleeve is provided with symmetrical mounting holes, one end of the motor is inserted into the insertion cylinder of the motor fixing sleeve and is fixed through bolts, the motor fixing sleeve is provided with a joint, and the joint is rotatably connected to the thrust bearing on the motor base.

[0013] Further, the bottom of the motor base is provided with symmetrical fixed seat mounting holes, the fixed seat mounting holes are fixedly connected to the ground plate through bolts, the motor base is provided with an insertion groove for mounting a joint, and the thrust bearing is mounted in the insertion groove of the motor base.

[0014] Further, the side surface of the motor base is provided with hole positions for connecting a pressing plate, the pressing plate is fixedly connected to the side surface of the motor base through a bolt assembly, and the thrust bearing is pressed through the pressing plate.

[0015] Further, the upper surface of the ground plate is fixedly connected to a sensor.

[0016] Compared with the prior art, the utility model has the following effects:

[0017] The zero adjustment structure of the vertical pendulum hinge of the seismic instrument is realized by mechanical and electronic control, mainly comprises a mechanical executing mechanism, an electronic control unit and a sensor detection unit, wherein, a motor is used as a power source, and the motor drives the executing mechanism to move through a screw pair, thereby achieving the working effect of adjusting the zero position of the pendulum of the seismic instrument, and the position state is fed back to the electronic control system through the sensor, thereby realizing real-time monitoring, closed-loop control and safety and reliability.

[0018] The zero adjustment structure of the vertical pendulum hinge of the seismic instrument is applicable to ITC-60 series wideband seismometers, ITC-120 series very wideband seismometers and ITC-360 series ultra wideband seismometers.

[0019] The screw assembly and the leaf spring fixing seat are connected through a thrust bearing to form a hinge structure, so that the leaf spring fixing seat can rotate up and down, the screw assembly is composed of an adjusting nut and an adjusting screw, the inside of the adjusting screw further has a small threaded rod, the small threaded rod has an external thread structure, the small screw is fixed with the rotating head of the motor through a jackscrew, the motor rotates to drive the small screw to rotate, and then drives the adjusting screw to rotate through the thread, the adjusting screw and the adjusting nut are in threaded connection, and the adjusting screw drives the adjusting nut to move through the thrust bearing when the adjusting screw rotates, the other end of the motor and the motor fixing sleeve are fixed through a jackscrew, the motor fixing sleeve and the motor base form a hinge through a thrust bearing, the motor base is a fixed structure, and the hinge of the thrust bearing of the motor fixing sleeve can rotate, and the end portion of the leaf spring fixing seat is fixedly connected with a curved leaf spring, the size of the bending of the leaf spring is adjusted through the vertical pendulum hinge zero adjustment structure, so that the position of the zero position of the pendulum can be adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the utility model;

[0021] Figure 2 is an installation structure schematic view of the vertical pendulum hinge zero adjustment structure and the ground plate;

[0022] Figure 3 is Figure 2 is an enlarged view of A part of the vertical pendulum hinge zero adjustment structure;

[0023] Figure 4 is a structural schematic view of the adjusting nut;

[0024] Figure 5 is a sectional view of the adjusting nut;

[0025] Figure 6 is a structural schematic view of the adjusting screw;

[0026] Figure 7 is a connection schematic view of the adjusting screw and the adjusting nut of the screw assembly; and

[0027] Figure 8 is the structural schematic view of the motor base;

[0028] Figure 9 is the connection schematic view of the motor base, the pressing plate and the thrust bearing;

[0029] Figure 10 is the structural schematic view of the motor fixing sleeve;

[0030] Figure 11 is the sectional view of the motor fixing sleeve;

[0031] In the figure: 1, leaf spring fixing seat, 2, ground plate, 3, vertical pendulum hinge zero adjustment structure, 4, sensor, 31, screw rod assembly, 32, motor, 33, motor fixing sleeve, 34, motor base, 311, adjusting nut, 322, adjusting screw rod, 323, threaded groove, 324, jackscrew hole, 331, joint, 341, fixing seat mounting hole, 342, pressing plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the technical scheme in the embodiments will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0033] Specific implementation method one: in combination with Figure 1 — Figure 3 The vertical pendulum hinge zero adjustment structure of the seismic instrument in the embodiment is described. The seismic instrument can adopt ITC-60 series broadband seismometer, ITC-120 series very broadband seismometer and ITC-360 series ultra broadband seismometer. The components include leaf spring fixing seat 1 and ground plate 2. The end of the leaf spring fixing seat 1 is fixedly connected with a curved leaf spring. The vertical pendulum hinge zero adjustment structure 3 is installed between the leaf spring fixing seat 1 and the ground plate 2. One end of the vertical pendulum hinge zero adjustment structure 3 is fixed on the ground plate 2. The vertical pendulum hinge zero adjustment structure 3 adjusts the bending strength of the leaf spring connected on the leaf spring fixing seat 1, so that the position of the zero position of the vertical pendulum hinge zero adjustment structure 3 is adjusted.

[0034] The vertical pendulum hinge zero adjustment structure 3 includes screw rod assembly 31, motor 32, motor fixing sleeve 33 and motor base 34.

[0035] The screw assembly 31 is hingedly connected to the one end of the leaf spring fixing seat 1, and the one end of the screw assembly 31 close to the motor 32 is fixedly connected to the motor 32, when the motor 32 rotates, the screw assembly 31 rotates, the tail of the motor 32 is fixedly connected to the motor fixing sleeve 33, the tail of the motor fixing sleeve 33 is hingedly connected to the motor base 34 through the thrust bearing, so that the motor fixing sleeve 33 drives the motor 32 to rotate, the bottom of the motor base 34 is fixed to the upper plane of the ground plate 2, when the motor 32 rotates, the motor fixing sleeve 33 is driven to rotate through the thrust bearing, thereby completing the angle adjustment of the vertical pendulum hinge zero adjustment structure 3.

[0036] Specific implementation method two: combined Figure 4 — Figure 7 In this embodiment, the screw assembly 31 includes an adjusting nut 311 and an adjusting screw 322, the threaded column on the adjusting screw 322 is inserted into the threaded hole of the adjusting nut 311, so that the adjusting nut 311 and the adjusting screw 322 are fixedly connected, and the leaf spring fixing seat 1 and the motor 32 are connected.

[0037] The adjusting nut 311 and the adjusting screw 322 are used in cooperation, the end of the adjusting nut 311 is used to connect the leaf spring fixing seat 1, the tail of the adjusting screw 322 is fixedly connected to the motor head of the motor 32 through the top wire, and the leaf spring fixing seat 1 and the motor 32 are connected through the screw assembly 31 composed of the adjusting nut 311 and the adjusting screw 322, so as to facilitate the installation of the motor 32.

[0038] Specific implementation method three: combined Figure 4 — Figure 7 In this embodiment, the adjusting nut 311 has symmetrical insertion columns, the insertion columns on the adjusting nut 311 are connected to the leaf spring fixing seat 1, and a threaded hole is formed in the tail of the adjusting nut 311 for mounting the adjusting screw 322.

[0039] The threaded hole is formed in the cylindrical part of the adjusting nut 311, the inner thread structure of the threaded hole is mainly fixedly connected to the threaded column of the adjusting screw 322 on the screw assembly 31, the top end of the cylindrical part is integrally connected to the insertion column, the insertion column arranged on the adjusting nut 311 can connect the adjusting nut 311 and the mounting plate of the leaf spring fixing seat 1, thereby completing the connection between the screw assembly and the leaf spring fixing seat 1.

[0040] Specific implementation method four: combined Figure 4 — Figure 7The embodiment is described, and the vertical pendulum hinge zero adjustment structure of the seismic instrument of the embodiment has a threaded column structure on the adjusting screw 322, a threaded groove 323 is formed in the tail of the adjusting screw 322, and a small threaded rod with external threads is inserted into the threaded groove 323. A jackscrew hole 324 is formed in the side surface of the threaded groove 323 for penetrating a jackscrew, and the jackscrew penetrates the jackscrew hole 324 and is fixed by the rotating head of the motor 32.

[0041] The adjusting screw 322 is composed of a large-diameter cylindrical part and a small-diameter cylindrical part, and the large-diameter cylindrical part and the small-diameter cylindrical part of the adjusting screw 322 are integrally connected. The small-diameter cylindrical part of the adjusting screw 322 is an external thread structure, so that the adjusting screw 322 and the adjusting nut 311 are fixedly connected through the external thread structure on the small-diameter cylindrical part.

[0042] The tail of the adjusting screw 322 is provided with a threaded groove 323, and a small threaded rod with external threads is inserted into the threaded groove 323. The small threaded rod is mainly used to fixedly connect the adjusting screw 322 and the rotating head of the motor 32. The threaded groove 323 and the jackscrew hole 324 are in parallel structure. After the small threaded rod on the adjusting screw 322 is fixed with the motor 32, the jackscrew is inserted into the jackscrew hole 324 to complete the installation of the adjusting screw 322 and the motor 32.

[0043] Specific implementation method five: combined Figure 10 Figure 11 The embodiment is described, and the vertical pendulum hinge zero adjustment structure of the seismic instrument of the embodiment has a threaded column structure on the adjusting screw 322, a threaded groove 323 is formed in the tail of the adjusting screw 322, and a small threaded rod with external threads is inserted into the threaded groove 323. A jackscrew hole 324 is formed in the side surface of the threaded groove 323 for penetrating a jackscrew, and the jackscrew penetrates the jackscrew hole 324 and is fixed by the rotating head of the motor 32.

[0044] The installation hole in the motor fixing sleeve 33 is mainly used to be fixed with the motor 32 through bolts. At the same time, part of the structure of the motor 32 is inserted into the motor fixing sleeve 33, and the joint 331 on the motor fixing sleeve 33 is fixedly connected with the inner ring surface of the thrust bearing on the motor base 34. The rotation of the motor fixing sleeve 33 can be driven by the thrust bearing, so as to adjust the angle of the motor fixing sleeve 33.

[0045] Specific implementation method six: combined Figure 8 Figure 9 The embodiment is described, and the vertical pendulum hinge zero adjustment structure of the seismic instrument of the embodiment has a threaded column structure on the adjusting screw 322, a threaded groove 323 is formed in the tail of the adjusting screw 322, and a small threaded rod with external threads is inserted into the threaded groove 323. A jackscrew hole 324 is formed in the side surface of the threaded groove 323 for penetrating a jackscrew, and the jackscrew penetrates the jackscrew hole 324 and is fixed by the rotating head of the motor 32.​​

[0046] The bottom of the motor seat 34 is symmetrically provided with fixing seat mounting holes 341, two fixing seat mounting holes 341 are arranged in parallel, and bolts are inserted into the two fixing seat mounting holes 341. The bolts are inserted into the fixing seat mounting holes 341, and then connected between the bolts and the ground plate, so as to connect the ground plate 2 and the motor seat 34, and ensure the stability of the motor seat 34;

[0047] Specific implementation seven: combined Figure 9 This embodiment is described, and the side surface of the motor seat 34 is provided with a hole position for connecting the pressing plate 342, and the pressing plate 342 is fixedly connected with the side surface of the motor seat 34 through a bolt assembly. The thrust bearing is pressed tightly through the pressing plate 342.

[0048] The side surface of the motor seat 34 is provided with a hole position for connecting the pressing plate 342, and the number of hole positions is two. The pressing plate 342 is provided with mounting holes which are the same as the hole positions on the side surface of the motor seat 34. When the pressing plate 342 is arranged in the slot on the side surface of the motor seat 34, the hole positions on the side surface of the motor seat 34 are matched with the mounting holes on the pressing plate 342. The bolt assembly is respectively inserted into the hole positions on the side surface of the motor seat 34 and the mounting holes on the pressing plate 342. The pressing plate 342 is fixed with the side surface of the motor seat 34 through the bolt assembly. The thrust bearing can be pressed tightly through the pressing plate 342. The thrust bearing is arranged in the slot of the motor seat 34. The motor fixing sleeve 33 is driven to rotate through the thrust bearing.

[0049] Specific implementation eight: combined Figure 1 — Figure 11 This embodiment is described, and the upper side of the ground plate 2 is fixedly connected with the sensor 4.

[0050] The screw rod assembly 31 is connected with the leaf spring fixing seat 1 through a thrust bearing to form a hinge structure, so that the leaf spring fixing seat 1 can rotate up and down, and the screw rod assembly 31 is composed of an adjusting nut 311 and an adjusting screw rod 322, wherein the inside of the adjusting screw rod 322 further has a small threaded rod with an external thread structure, the small threaded rod is fixed with the rotating head of the motor 32 through a jackscrew, the motor 32 drives the small threaded rod to rotate when rotating, and then drives the adjusting screw rod 322 to rotate through the thread, and the adjusting screw rod 322 is in threaded connection with the adjusting nut 311, and the adjusting screw rod 322 drives the adjusting nut 311 to move when rotating, so that the adjusting nut 311 drives the leaf spring fixing seat 1 to move through the thrust bearing, and the other end of the motor 32 is fixed with a motor fixing sleeve 33 through a jackscrew, and the motor fixing sleeve 33 is connected with a motor base 34 through a thrust bearing to form a hinge, wherein the motor base 34 is a fixed structure, so that the motor 32 changes the length of the screw rod assembly 31 (because the adjusting screw rod 322 is connected with the adjusting nut 311 through the thread structure) when rotating,

[0051] The thrust bearing hinge rotates, and the end of the leaf spring fixing seat 1 is fixedly connected with a curved leaf spring, the size of the bending of the leaf spring is adjusted through the vertical pendulum hinge zero adjustment structure, so that the position of the zero position of the pendulum can be adjusted, and the sensor 4 fixed on the chassis 2 prevents the position adjusted by the vertical pendulum hinge zero adjustment structure from being too large to damage the vertical pendulum hinge zero adjustment structure, and the position state is fed back to the electronic control system through the sensor, so that the position state is monitored in real time, and the protection effect is achieved.

[0052] The above is only a preferred embodiment of the present application, and does not limit the present application in any form, although the present application has been disclosed as above with a preferred embodiment, however, it is not intended to limit the present application, any skilled person in the art can make some changes or modifications to the equivalent embodiments within the scope of the technical scheme of the present application without departing from the technical scheme of the present application, but as long as it does not depart from the technical scheme of the present application, according to the technical essence of the present application, within the spirit and principles of the present application, any simple modification, equivalent replacement and improvement of the above embodiment are still within the protection scope of the technical scheme of the present application.

Claims

1. A zero-adjustment structure for a vertical pendulum hinge of a seismic instrument, comprising a leaf spring fixing seat (1) and a base (2), wherein a bent leaf spring is fixedly connected to the end of the leaf spring fixing seat (1), characterized in that, A vertical pendulum hinge zeroing structure (3) is installed between the leaf spring fixing seat (1) and the chassis (2). One end of the vertical pendulum hinge zeroing structure (3) is fixed on the chassis (2). The vertical pendulum hinge zeroing structure (3) adjusts the bending strength of the leaf spring connected to the leaf spring fixing seat (1) so that the vertical pendulum hinge zeroing structure (3) adjusts the zero position. The vertical pendulum hinge zeroing structure (3) includes a screw assembly (31), a motor (32), a motor fixing sleeve (33), and a motor base (34); The screw assembly (31) is hinged and rotatably connected to the leaf spring fixing seat (1) at one end. The screw assembly (31) is fixedly connected to the motor (32) at one end. When the motor (32) rotates, it drives the screw assembly (31) to rotate. The tail of the motor (32) is fixedly connected to the motor fixing sleeve (33). The tail of the motor fixing sleeve (33) is hinged to the motor base (34) through a thrust bearing, so that the motor fixing sleeve (33) drives the motor (32) to rotate. The bottom of the motor base (34) is fixed to the upper plane of the chassis (2). When rotating, the motor mounting sleeve (33) is driven to rotate through the thrust bearing.

2. The zero-adjustment structure of the vertical pendulum hinge of the seismic instrument according to claim 1, characterized in that, The screw assembly (31) includes an adjusting nut (311) and an adjusting screw (322). The threaded post on the adjusting screw (322) is inserted into the threaded hole of the adjusting nut (311) to connect and fix the adjusting nut (311) and the adjusting screw (322), which is used to connect the leaf spring fixing seat (1) and the motor (32).

3. The zero-adjustment structure of the vertical pendulum hinge of the seismic instrument according to claim 2, characterized in that, The adjusting nut (311) has symmetrical inserts, and the inserts on the adjusting nut (311) are connected to the leaf spring fixing seat (1). The tail of the adjusting nut (311) has a threaded hole for installing the adjusting screw (322).

4. The zeroing structure of the vertical pendulum hinge of the seismic instrument according to claim 2 or 3, characterized in that, The adjusting screw (322) has a threaded column structure. The tail of the adjusting screw (322) is provided with a threaded groove (323), and a small threaded rod with external threads is inserted into the threaded groove (323). The side of the threaded groove (323) is provided with a set screw hole (324) for inserting a set screw. The set screw passes through the set screw hole (324) and is fixed to the rotating head of (32) by the set screw.

5. The zero-adjustment structure of the vertical pendulum hinge of the seismic instrument according to claim 1, characterized in that, The motor mounting sleeve (33) has symmetrical mounting holes on the insert. One end of the motor (32) is inserted into the insert of the motor mounting sleeve (33) and fixed by bolts. The motor mounting sleeve (33) has a connector (331) which is rotatably connected to the thrust bearing on the motor base (34).

6. The zero-adjustment structure of the vertical pendulum hinge of the seismic instrument according to claim 5, characterized in that, The bottom of the motor base (34) is symmetrically provided with mounting holes (341), which are fixedly connected to the chassis (2) by bolts. The motor base (34) has a slot for mounting connector (331), and the thrust bearing is installed in the slot of the motor base (34).

7. The zero-adjustment structure of the vertical pendulum hinge of the seismic instrument according to claim 6, characterized in that, The side of the motor base (34) is provided with holes for connecting the pressure plate (342), and the pressure plate (342) is fixedly connected to the side of the motor base (34) by bolt assembly, and the thrust bearing is pressed by the pressure plate (342).

8. The zero-adjustment structure of the vertical pendulum hinge of the seismic instrument according to claim 1, characterized in that, A sensor (4) is fixedly connected above the chassis (2).

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