CN117647227B - Bidirectional inertial inclination sensor - Google Patents

Abstract

The application discloses a bidirectional inertial inclination sensor, which comprises a first base, a second base, a flexible structure, a balance beam assembly and a mass center height adjusting assembly, wherein the second base is arranged in a first installation area of the first base; the flexible structure is respectively connected with the first base and the second base; the balance beam assembly comprises a balance beam and a center base, and the center base is arranged in a second installation area of the second base; the mass center height adjusting assembly comprises a coarse adjusting assembly and a fine adjusting assembly, the coarse adjusting assembly drives the center base to lift, the fine adjusting assembly comprises a first mass block and a first inclined adjusting rod, and the first mass block is movable along the axial direction of the first adjusting rod; four balance beams are circumferentially arranged on the outer side of the center base, the included angles of two adjacent balance beams are right angles, the fine adjustment assemblies are 2N, two fine adjustment assemblies are located at opposite positions, and the fine adjustment assemblies located at opposite positions synchronously operate so that the first mass blocks synchronously move upwards in an inclined mode or synchronously move downwards in an inclined mode.

Description

Bidirectional inertial inclination sensor

Technical Field

The application relates to the technical field of inertial tilt sensors, in particular to a bidirectional inertial tilt sensor.

Background

The related art discloses an inertial tilt sensor, the original purpose of design is for the initiative vibration isolation performance below 0.1Hz of initiative vibration isolation platform, but find in the course of development, because tilt sensor mechanical structure belongs to meter level structure, install comparatively difficultly in the limited space of small-size three degree of freedom initiative vibration isolation platform, two sets of tilt sensors in orthogonal direction are unrealistic simultaneously, consequently consider optimizing current unidirectional low frequency tilt sensor, hope can realize the angle measurement of bi-directional, still must consider the realizability of assembly in the course of design, need consider reducing flexible structure's assembly degree of difficulty and barycenter regulation precision.

The inertial tilt sensor at present mainly has the following problems.

1. The flexible structure of the inertial tilt sensor disclosed in the related art can only satisfy one rotation in the axial direction, i.e., can only realize tilt measurement in one axial direction.

2. The inertial inclination sensor balance beam disclosed in the related art is of an axisymmetric structure, only one axial inclination angle can be measured in a plane, and the application range in practical application is greatly limited, so that a centrally symmetric bidirectional identical inclination angle measuring device is required to be provided, the simultaneous measurement of X, Y axis inclination angles can be realized, namely the measurement of the inclination angles in the plane is realized, and the use function of the inertial inclination sensor balance beam can be greatly improved.

3. The balance beam of the inertial tilt sensor disclosed in the related art needs to utilize the balancing weight to carry out horizontal direction balance adjustment due to the existence of machining precision and assembly errors, the balancing weight is positioned at the end part of the balance beam, the adjusting force arm is longer, and the adjusting quality is larger, so that the phenomenon of overshoot easily occurs in the adjusting process, and the fine adjusting device adopting threaded connection is very important for symmetrical structures with high precision requirements.

4. The research shows that the vertical centroid of the inertia balance beam structure is close to the rotation center as much as possible, which puts a severe requirement on the assembly precision of the inclination sensor before delivery, however, even if the assembly precision of the inclination sensor before delivery is very high, the centroid of the inertia balance beam structure drifts due to external vibration, increase of using time, change of using environment and the like, if centroid adjustment is not performed, the low-frequency high-performance inclination sensor may introduce errors accumulation, instability, sensitivity reduction, frequency response problem and other damages when measuring the low-frequency angle of the vibration isolation platform, thereby reducing the measurement accuracy and reliability. Therefore, in precision measurement physics, it is very important to ensure centroid adjustment of the tilt sensor.

Disclosure of Invention

In order to solve at least one of the above technical problems, the present application provides a bidirectional inertial tilt sensor, and the adopted technical scheme is as follows.

The bidirectional inertial inclination sensor comprises a first base, a second base, a flexible structure, a balance beam assembly and a mass center height adjusting assembly, wherein a first installation area is formed in the first base in a hollow mode; the second base is hollow to form a second installation area, and the second base is arranged in the first installation area; the flexible structure is respectively connected with the first base and the second base so as to enable the second base to be suspended in the first installation area; the balance beam assembly comprises a balance beam and a center base, the center base is arranged in the second installation area, and one end of the balance beam is arranged in the center base; the mass center height adjusting assembly comprises a coarse adjusting assembly and a fine adjusting assembly, the coarse adjusting assembly and the fine adjusting assembly are both arranged on the second base, the coarse adjusting assembly is connected with the center base and can drive the center base to lift, the fine adjusting assembly comprises a first mass block and a first inclined adjusting rod, the first mass block is arranged on the first adjusting rod, and the first mass block is movable along the axial direction of the first adjusting rod; four balance beams are arranged on the outer side of the center base along the circumferential direction, the included angles of two adjacent balance beams are right angles, the two balance beams at opposite positions are coaxial, the trimming assemblies are 2N, N is a positive integer, N is more than or equal to 2, every two trimming assemblies are located at opposite positions in pairs, and the trimming assemblies at opposite positions synchronously operate, so that the first mass blocks synchronously move upwards in an inclined manner or synchronously move downwards in an inclined manner.

In some embodiments of the present application, the coarse adjustment assembly includes a second adjusting rod and a lifting seat, the central base is disposed on the lifting seat, the second adjusting rod is connected to the lifting seat, and the second adjusting rod is lifted in the second base in a spiral transmission manner, so as to drive the lifting seat to move up and down; the fine adjustment assembly comprises first gears, one end of each first adjusting rod is provided with the first gears, the mass center height adjustment assembly comprises a bevel gear linkage structure, the bevel gear linkage structure is sleeved on the outer peripheral side wall of the second adjusting rod, the bevel gear linkage structure comprises second bevel gears, each first gear is in meshed transmission with the second bevel gears, and the first adjusting rod drives the first mass block to move in a spiral transmission mode and achieves synchronous rotation of each first adjusting rod through meshed transmission of the second bevel gears.

In some embodiments of the present application, the bevel gear linkage structure includes a third bevel gear, the third bevel gear is located above the second bevel gear, the first gear is configured as a bevel gear, and both the third bevel gear and the second bevel gear are meshed with the first gear; the second bevel gear and the third bevel gear have different conicity and/or the second bevel gear and the third bevel gear have different diameters.

In certain embodiments of the present disclosure, the third bevel gear has a taper greater than that of the second bevel gear, the third bevel gear has a diameter greater than that of the second bevel gear, and each of the first adjustment bars is inclined downward; or the taper of the third bevel gear is smaller than that of the second bevel gear, the diameter of the third bevel gear is smaller than that of the second bevel gear, and each first adjusting rod is inclined upwards.

In some embodiments of the present application, the number of the fine tuning assemblies is four, and the positions of the four fine tuning assemblies correspond to the positions of the four balance beams and are respectively located below the corresponding balance beams.

In certain embodiments of the present application, wherein the first gear of two coaxial first adjustment rods is larger than the diameter of the first gear of the other two coaxial first adjustment rods.

In certain embodiments of the present application, the central base is hollow, the flexible structure is located in the central base, the first base is provided with a first connection structure, the first connection structure extends downwards from the top of the first base to the second installation area, the upper end of the flexible structure is connected with the first connection structure, the second base is provided with a second connection structure, and the lower end of the flexible structure is connected with the second connection structure.

In some embodiments of the present application, the outer side wall of the flexible structure is provided with a recess along the circumference, so that the flexible structure has an upper connecting portion and a lower connecting portion, the recess is formed by concave forming at the bottom of the upper connecting portion and forms an upper limiting portion along the circumference at the bottom of the upper connecting portion, the recess is formed by concave forming at the top of the lower connecting portion and forms a lower limiting portion along the circumference at the top of the lower connecting portion, and when the upper connecting portion is inclined relative to the lower connecting portion, the upper limiting portion is abutted to the lower limiting portion to limit the inclination angle of the upper connecting portion relative to the lower connecting portion.

In some embodiments of the present application, the balance beam assembly includes a second mass block, and the other end of each balance beam is provided with the second mass block, and the second mass block can move along the axial direction of the balance beam where the second mass block is located, and the second mass block moves in a spiral transmission manner.

In certain embodiments of the present disclosure, the bi-directional inertial tilt sensor includes a locking member threadably coupled to a sidewall of the first base, and an end of the locking member is configured to abut an outer sidewall of the second base to secure the second base.

Embodiments of the present application have at least the following beneficial effects: the bidirectional inertial inclination sensor is provided with balance beams which are coaxial in pairs, bidirectional measurement is achieved, the height of the mass center of the balance beam assembly is adjusted by the coarse adjustment assembly, the height of the mass center is further adjusted by the fine adjustment assembly, and adjustment accuracy is improved. In the fine tuning assembly, the first mass blocks synchronously move in an inclined mode, components of displacement of the first mass blocks in the horizontal direction are offset in pairs, and components in the vertical direction are overlapped, so that fine tuning of the mass center height is achieved. The inertial inclination angle sensor can be widely applied to the technical field of inertial inclination angle sensors.

Drawings

The aspects and advantages described and/or appended to the embodiments of the present application will become apparent and readily appreciated from the following drawings. It should be noted that the embodiments shown in the drawings below are exemplary only and are not to be construed as limiting the application.

Fig. 1-1 is a block diagram of a bi-directional inertial tilt sensor.

Fig. 1-2 is a partial view of region a of fig. 1-1.

Fig. 1-3 are cross-sectional views of a bi-directional inertial tilt sensor.

Fig. 2-1 is a structural view of the first base.

Fig. 2-2 are block diagrams of a second base, a balance beam assembly, and a center of mass height adjustment assembly.

Fig. 2-3 are block diagrams of the balance beam assembly.

Fig. 2-4 are block diagrams of a second base and a center of mass height adjustment assembly.

Fig. 2-5 are cross-sectional views of fig. 2-4.

Fig. 3-1 is a block diagram of a center of mass height adjustment assembly.

Fig. 3-2 is a block diagram of a trim assembly.

Fig. 3-3 are block diagrams of the first gear meshing with the second bevel gear and the third bevel gear, respectively.

Fig. 4-1 is a cross-sectional view of a flexible structure.

Reference numerals: 1100. a first base; 1101. a first connection structure; 1200. a second base; 1201. a second connection structure; 1300. a flexible structure; 1301. a recessed region; 1302. an upper connection part; 1303. a lower connecting part; 1304. an upper limit part; 1305. a lower limit part; 1400. a locking member; 2000. a balance beam assembly; 2100. a balance beam; 2200. a center base; 3000. a centroid height adjustment assembly; 3100. a fine tuning assembly; 3101. a first mass; 3102. a first adjusting lever; 3103. a first gear; 3104. a first mount; 3105. a first guide structure; 3201. a second adjusting lever; 3202. a lifting seat; 3203. a lifting transmission structure; 3301. a second bevel gear; 3302. and a third bevel gear.

Detailed Description

Embodiments of the present application are described in detail below in conjunction with fig. 1-1 through 4-1, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that, if the terms "center," "middle," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships are based on the orientations or positional relationships illustrated in the drawings, it is merely for convenience in describing the present application and simplifying the description, and it does not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The application relates to a bidirectional inertial tilt sensor, and referring to fig. 1-1 to fig. 2-5, the bidirectional inertial tilt sensor includes a first base 1100, a second base 1200 and a balance beam assembly 2000, the first base 1100 is disposed on a vibration isolation platform or a working platform, a first mounting area is formed in the first base 1100, the second base 1200 is disposed on the first mounting area, and the balance beam assembly 2000 is disposed on the second base 1200. Further, referring to fig. 1-3, the bi-directional inertial tilt sensor includes a flexible structure 1300, where the flexible structure 1300 is connected to the first base 1100 and the second base 1200, respectively, so that the second base 1200 is suspended from the first mounting area, and the balance beam assembly 2000 is in a suspended state.

Referring to fig. 2 to 3, the balance beam assembly 2000 includes a balance beam 2100 and a center base 2200, one end of the balance beam 2100 is disposed at the center base 2200, the balance beam 2100 is connected to a sidewall of the center base 2200, and the center base 2200 is disposed at the second base 1200. Referring to fig. 2-4 and 2-5, the second base 1200 is hollow to form a second mounting region, the center base 2200 is disposed at the second mounting region, and the balance beam 2100 protrudes from the second mounting region. Further, the balance beams 2100 are arranged in pairs, so as to play a role of balancing the mass centers of the bidirectional inertial inclination sensors.

Referring to fig. 1-1, 2-2 and 2-3, the balance beams 2100 of the side wall of the center base 2200 extend outwards in the radial direction of the center base 2200, four balance beams 2100 are circumferentially arranged on the outer side of the center base 2200, the included angle between two adjacent balance beams 2100 is a right angle, the two balance beams 2100 in opposite positions are coaxial, and the balance beam assembly 2000 is formed in a symmetrical structure. It will be appreciated that in the XYZ coordinate system, two of the balance beams 2100 in opposite positions are arranged along the X axis, and the other two balance beams 2100 in opposite positions are arranged along the Y axis, so that the balance beam assembly 2000 forms balance in two directions of the X axis and the Y axis, and bidirectional isotactic, bidirectional replaceable interchange in the XY direction is achieved, and high symmetry is achieved.

Further, referring to fig. 1-3, fig. 2-2, fig. 2-4, fig. 2-5, and fig. 3-1, the bidirectional inertial tilt sensor includes a centroid height adjusting component 3000, the centroid height adjusting component 3000 is disposed on the second base 1200, and the centroid height adjusting component 3000 is disposed at the bottom of the second base 1200, it can be understood that the centroid height adjusting component 3000 is used for adjusting the centroid height of the bidirectional inertial tilt sensor, so as to implement adjustment and calibration of the centroid. Specifically, referring to fig. 3-1, the center of mass height adjusting assembly 3000 includes a coarse adjusting assembly and a fine adjusting assembly 3100, after the coarse adjusting assembly adjusts the center of mass height of the balance beam assembly 2000, the coarse adjusting assembly 3100 further adjusts the center of mass height of the balance beam assembly 2000, and the fine adjusting assembly 3100 adjusts the center of mass height with small variation, so as to improve the accuracy of adjustment.

The coarse adjustment assembly is provided at the second base 1200, and the coarse adjustment assembly is connected to the center base 2200 and can drive the center base 2200 to be lifted, thereby moving the balance beam assembly 2000 up and down. The fine tuning assembly 3100 is disposed on the second base 1200, the fine tuning assembly 3100 is connected to a side wall of the second base 1200, and referring to fig. 3-2, the fine tuning assembly 3100 includes a first mass block 3101 and a first inclined adjusting rod 3102, the first adjusting rod 3102 is disposed on the side wall of the second base 1200, the first mass block 3101 is disposed on the first adjusting rod 3102, and the first mass block 3101 is movable along an axial direction of the first adjusting rod 3102, so as to change a position of the first mass block 3101 on the first adjusting rod 3102. The first adjustment lever 3102 is inclined with respect to the horizontal plane, the inclination angle of the first adjustment lever 3102 is 10 ° to 15 °, one end of the first adjustment lever 3102 is high and the other end is low, and the first mass block 3101 reciprocates along the inclined first adjustment lever 3102, so that the height of the first mass block 3101 can be adjusted up and down, thereby finely adjusting the centroid height of the bidirectional inertial tilt sensor.

The fine tuning assemblies 3100 are arranged in 2N pairs, N is a positive integer, N is larger than or equal to 2, the fine tuning assemblies 3100 are arranged in pairs and are located at opposite positions, and a central symmetrical structure is formed among the fine tuning assemblies 3100. The fine adjustment assemblies 3100 in the relative positions operate synchronously, and each first mass block 3101 moves synchronously obliquely upward or each first mass block 3101 moves synchronously obliquely downward along the axial direction of the corresponding first adjustment rod 3102 under the guidance of the corresponding first adjustment rod 3102. In this case, in the fine adjustment assembly 3100 in the relative position, the components of the displacement of the first mass block 3101 in the horizontal direction cancel each other out, and the components of the displacement of the first mass block 3101 in the vertical direction overlap, so that on one hand, the introduction of new tilt interference in the horizontal direction is avoided, and on the other hand, the movement of the first mass block 3101 is prevented from affecting the position of the centroid in the horizontal plane, and on the other hand, the height of the centroid in the vertical direction can be finely adjusted.

In some embodiments, referring to fig. 3-1, the trimming assemblies 3100 are arranged in four, and the positions of the four trimming assemblies 3100 correspond to the positions of the four balance beams 2100 and are respectively located below the corresponding balance beams 2100. The projections of the axial directions of the four first adjustment bars 3102 in the vertical direction on the horizontal plane are respectively located on the X-axis or the Y-axis, and are respectively parallel to the axial directions of the four balance beams 2100.

As an embodiment, the balance beam assembly 2000 includes a second mass block, and the other end of each balance beam 2100 is provided with the second mass block, and the second mass block can move along the axial direction of the balance beam 2100 where it is located. It will be appreciated that movement of the second mass in the axial direction of the balance beam 2100 enables adjustment of the position of the center of mass of the balance beam assembly 2000 in the horizontal direction.

In particular, the second mass moves in a screw-driven manner. The second mass block is provided with the screw hole, and the lateral wall of compensating beam 2100 tip is provided with the external screw thread, and the second mass block passes through threaded connection to be set up in compensating beam 2100's tip, rotates the second mass block, then can realize the ascending removal of second mass block along compensating beam 2100 axial.

It should be noted that, by horizontally adjusting the center of mass position of the balance beam assembly 2000, a user can find and solve a potential installation error early, reduce the risk of error accumulation, improve the accuracy and reliability of measurement of the bidirectional inertial tilt sensor, facilitate simplification and standardization of operation, reduce cost and maintenance, and provide effective support for use of the bidirectional inertial tilt sensor.

Further, the screw gap is eliminated between the second mass block and the balance beam 2100 through the screw gap restraining structure, so that the second mass block is prevented from moving in the screw gap, the balance state of the system is prevented from being influenced, and the measurement accuracy of the bidirectional inertial inclination sensor is improved. Specifically, the thread gap suppression structure is provided as a spring that is sleeved on the balance beam 2100, and applies a force to the second mass block in the axial direction of the balance beam 2100 so that the thread flanks of the internal threads of the second mass block abut against the thread flanks of the external threads of the balance beam 2100, thereby eliminating the thread gap.

Regarding the thread clearance suppression structure, at least an alternative design is also: the screw gap restraining structure is set to be magnetic pieces, the second mass block and the balance beam 2100 are respectively embedded with the magnetic pieces, and attractive or repulsive magnetic force is generated between the second mass block and the balance beam 2100, so that the screw thread side surface of the internal screw thread of the second mass block is abutted against the screw thread side surface of the external screw thread of the balance beam 2100, and the screw gap is eliminated.

As an embodiment, referring to fig. 1-3 and fig. 3-1, the coarse adjustment assembly includes a second adjustment rod 3201 and a lifting seat 3202, the center base 2200 is disposed on the lifting seat 3202, the second adjustment rod 3201 is connected to the lifting seat 3202, and the lifting seat 3202 is located on top of the second adjustment rod 3201. It can be appreciated that the second adjusting lever 3201 drives the lifting base 3202 to move up and down, so that the center base 2200 moves up and down, thereby adjusting the height of the center of mass of the balance beam assembly 2000.

Specifically, the second adjusting rod 3201 is lifted in the second base 1200 in a screw driving manner, so as to drive the lifting seat 3202 to move up and down. Referring to fig. 2-5, a lifting transmission structure 3203 is disposed in a second mounting area of the second base 1200, the lifting transmission structure 3203 is provided with a threaded hole, the second adjusting rod 3201 penetrates through the threaded hole of the lifting transmission structure 3203, an external thread is disposed on a side wall of the second adjusting rod 3201, and the second adjusting rod 3201 is in threaded connection with a side wall of the threaded hole of the lifting transmission structure 3203. In this case, the second adjusting rod 3201 is rotated, and the lifting transmission structure 3203 drives the second adjusting rod 3201 to lift in a spiral transmission manner, so that the second adjusting rod 3201 drives the lifting seat 3202 to move up and down.

Referring to fig. 2-4 and 2-5, a lower end of the second adjusting lever 3201 penetrates the bottom of the second base 1200 and extends outward. In some examples, a knob is provided at a lower end of the second adjustment lever 3201 so that a user manually rotates the second adjustment lever 3201. In other examples, the second adjusting lever 3201 is rotated in an automatic manner, specifically, a motor is disposed at a lower end of the second adjusting lever 3201, and a rotating shaft of the motor drives the second adjusting lever 3201 to rotate in a belt transmission or gear engagement manner.

In some examples, referring to fig. 2-5, the lifting transmission structure 3203 is configured as a block structure, the lifting transmission structure 3203 is clamped in the second installation area, and an inner side wall of the second installation area abuts against an outer side wall of the lifting transmission structure 3203, so that the lifting transmission structure 3203 cannot rotate in the second base 1200, and in this case, the second adjusting rod 3201 can move up and down when rotating. In other examples, the lifting transmission structure 3203 is integrally formed with the second base 1200.

It should be noted that, the weight of the balance beam assembly 2000 and the weight of the second adjusting rod 3201 themselves are utilized between the second adjusting rod 3201 and the lifting transmission structure 3203 to eliminate the screw gap, so as to prevent the second adjusting rod 3201 from moving in the screw gap.

As an embodiment, the first adjusting lever 3102 drives the first mass 3101 to move in a screw transmission manner. Specifically, the first adjusting rod 3102 is rotatably disposed on a side wall of the second base 1200, an external thread is disposed on a side wall of the first adjusting rod 3102, a threaded hole is disposed on the first mass block 3101, the side wall of the first adjusting rod 3102 is in threaded connection with the inner side wall of the threaded hole of the first mass block 3101, and the first mass block 3101 can be pushed to move by rotating the first adjusting rod 3102. Referring to fig. 2-2, 2-4 and 2-5, the first adjustment lever 3102 is provided with a knob.

It will be appreciated that the thread specifications of each first adjustment lever 3102 are the same to ensure that each first mass 3101 moves synchronously and the displacement of the movement is the same.

Further, referring to fig. 3-2, the fine adjustment assembly 3100 includes a first guide structure 3105, the first guide structure 3105 is provided in at least one, one end of the first guide structure 3105 is connected to a side wall of the second base 1200, a guide direction of the first guide structure 3105 is parallel to an axial direction of the first adjustment lever 3102, and the first mass 3101 is slidably connected to the first guide structure 3105, so that the first mass 3101 moves smoothly along the axial direction of the first adjustment lever 3102. Specifically, the first guide structure 3105 is provided as a guide rod or rail or channel.

Referring to fig. 3-2, the fine adjustment assembly 3100 includes a first mounting bracket 3104, the other end of the first guide structure 3105 is connected to the first mounting bracket 3104, the first adjustment lever 3102 is rotatably connected to the first mounting bracket 3104, the first adjustment lever 3102 extends through the first mounting bracket 3104, and a knob is located on the first adjustment lever 3102 at one end extending through the first mounting bracket 3104.

The screw gap is eliminated between the first adjustment lever 3102 and the first mass 3101 by a gravitational component of the first mass 3101 in the vertical direction, so as to prevent the first mass 3101 from moving in the screw gap.

In one embodiment, in the center of mass height adjustment assembly 3000, the first adjustment lever 3102 of each of the fine adjustment assemblies 3100 is rotated synchronously to enable each of the first masses 3101 to move synchronously, specifically, each of the first masses 3101 moves synchronously obliquely upward or synchronously obliquely downward. In this case, the components of the displacement of each first mass 3101 in the horizontal direction cancel each other out two by two, and the components of the position of each first mass 3101 in the vertical direction are superimposed.

Referring to fig. 3-2, the fine adjustment assembly 3100 includes a first gear 3103, one end of each first adjustment lever 3102 is provided with the first gear 3103, the first gear 3103 is located in a second installation region, a sidewall of the second base 1200 is provided with an inclined first installation hole, the first installation hole is a through hole, the first adjustment lever 3102 penetrates the first installation hole to enable one end of the first adjustment lever 3102 to extend to the second installation region, and the first gear 3103 is located at one end of the first adjustment lever 3102 extending into the second installation region. The center of mass height adjustment assembly 3000 is configured to rotate the first adjustment bars 3102 in a gear-engaged manner to move the first masses 3101 in a synchronized manner.

The center of mass height adjusting assembly 3000 includes a bevel gear linkage structure, wherein the bevel gear linkage structure is sleeved on the outer peripheral sidewall of the second adjusting rod 3201, and specifically, the bevel gear linkage structure is disposed on the outer sidewall of the second adjusting rod 3201 through a sleeve. The first gears 3103 are synchronously rotated by the bevel gear linkage structure, so that the first adjusting bars 3102 are synchronously rotated. Specifically, the bevel gear linkage structure includes a second bevel gear 3301, and each first gear 3103 is in meshing transmission with the second bevel gear 3301, so that synchronous rotation of each first adjusting lever 3102 is achieved through meshing transmission of the second bevel gear 3301. It can be appreciated that when one of the first adjusting levers 3102 is rotated, the first gear 3103 of the first adjusting lever 3102 drives the second bevel gear 3301 to rotate, and the second bevel gear 3301 drives the other first gears 3103 to rotate, so as to drive the other first adjusting levers 3102 to rotate, thereby realizing synchronous rotation of each first adjusting lever 3102.

In some examples, the tooth surface of the second bevel gear 3301 is facing up and the first adjustment bar 3102 is inclined downward, the first adjustment bar 3102 is inclined downward by an angle of 10 ° to 15 °, the first gear 3103 is located at the high end of the first adjustment bar 3102, and the knob is located at the low end of the first adjustment bar 3102. In this case, when the first mass 3101 moves obliquely upward, the first mass 3101 gradually approaches the second base 1200.

Further, the bevel gear linkage structure includes a third bevel gear 3302, and referring to fig. 2-5 and fig. 3-3, the third bevel gear 3302 is located above the second bevel gear 3301, the tooth surface of the third bevel gear 3302 faces downward, the first gear 3103 is configured as a bevel gear, and both the third bevel gear 3302 and the second bevel gear 3301 mesh with the first gear 3103. In this case, the tapers of the second bevel gear 3301 and the third bevel gear 3302 are different and/or the diameters of the second bevel gear 3301 and the third bevel gear 3302 are different to tilt the first adjustment lever 3102.

In some examples, referring to fig. 2-5 and fig. 3-3, third bevel gear 3302 has a taper that is greater than a taper of second bevel gear 3301, and third bevel gear 3302 has a diameter that is greater than a diameter of second bevel gear 3301. In this case, if the bevel gear surface of the first gear 3103 is to be maintained while being engaged with the second bevel gear 3301 and the third bevel gear 3302, the first gear 3103 needs to be inclined, and the upper portion of the first gear 3103 is inclined outward. Accordingly, each of the first adjustment bars 3102 is inclined downward.

In the case where the first gears 3103 are provided as bevel gears, in order to avoid interference between two adjacent first gears 3103, the present application further designs that the first gears 3103 of two coaxial first adjustment bars 3102 are larger than the diameters of the first gears 3103 of the other two coaxial first adjustment bars 3102, the positions where the large-diameter first gears 3103 mesh with the second and third bevel gears 3301, 3302 are outside, and the positions where the small-diameter first gears 3103 mesh with the second and third bevel gears 3301, 3302 are inside, so that the positions of the adjacent two first gears 3103 between the second and third bevel gears 3301, 3302 are staggered, thereby avoiding interference.

With respect to the bevel gear linkage structure and the design of the first adjustment lever 3102 and the first gear 3103 in the fine adjustment assembly 3100, at least the following alternative examples exist.

In some alternative examples, third bevel gear 3302 has a taper that is less than the taper of second bevel gear 3301, third bevel gear 3302 has a diameter that is less than the diameter of second bevel gear 3301, each first adjustment bar 3102 is angled upward, and first adjustment bar 3102 is angled upward by an angle of 10 ° to 15 °. In this case, the first gear 3103 is positioned at a low end of the first adjustment lever 3102, and the knob is positioned at a high end of the first adjustment lever 3102. As the first mass 3101 moves upward, the first mass 3101 gradually moves away from the second base 1200.

In other alternative examples, the bevel gear linkage is provided with a second bevel gear 3301 and no third bevel gear 3302 is provided. Further, the first gear 3103 is provided as a bevel gear or a cylindrical gear, and the first adjusting lever 3102 is inclined downward.

In still other alternative examples, the bevel gear linkage is provided with a third bevel gear 3302 and no second bevel gear 3301 is provided. Further, the first gear 3103 is provided as a bevel gear or a cylindrical gear, and the first adjusting lever 3102 is inclined upward.

As an embodiment, referring to fig. 1-3 and fig. 2-1, the first base 1100 is provided with a first connection structure 1101, the first connection structure 1101 is disposed on top of the first base 1100, and the first connection structure 1101 extends downward to the first installation area, the first connection structure 1101 is provided as a column, the upper end of the flexible structure 1300 is connected with the first connection structure 1101, and the first connection structure 1101 applies an upward tension force to the flexible structure 1300. Further, referring to fig. 2-4 and fig. 2-5, the second base 1200 is provided with a second connection structure 1201, and the lower end of the flexible structure 1300 is connected to the second connection structure 1201. It will be appreciated that the first base 1100 is connected to the flexible structure 1300 by the first connection structure 1101 and the second base 1200 is connected to the flexible structure 1300 by the second connection structure 1201, respectively, such that the second base 1200 is suspended from the first mounting area by the flexible structure 1300.

Further, the flexible structure 1300 is disposed in the second mounting area, and referring to fig. 1-3 and fig. 2-1, the first connecting structure 1101 extends downward from the top of the first base 1100 to the second mounting area, the second connecting structure 1201 is disposed in the second mounting area, the second connecting structure 1201 is connected to the top of the second base 1200 through a pillar, and the pillar connected to the second connecting structure 1201 extends upward from the second mounting area to the top of the second base 1200. And the column to which the second connection structure 1201 is connected is provided as at least one, the second connection structure 1201 is provided as a mounting seat or a mounting plate.

Referring to fig. 1-3 and 2-3, central base 2200 is hollow and flexible structure 1300 is positioned within central base 2200. It should be noted that the second adjusting rod 3201, the first connecting structure 1101, the flexible structure 1300, and the center base 2200 are disposed at the assembling position of the co-vertical axis, so as to ensure the assembling precision of the bi-directional inertial tilt sensor and the measuring accuracy.

As an embodiment, referring to fig. 4-1, the outer side wall of the flexible structure 1300 is provided with a recess 1301 along the circumference, so that the flexible structure 1300 has an upper connection portion 1302 and a lower connection portion 1303, the upper connection portion 1302 is connected with the first connection structure 1101, and the lower connection portion 1303 is connected with the second connection structure 1201.

Specifically, the recess 1301 is formed along the circumference, so that a flexible connection part can be formed at the center of the flexible structure 1300, the upper connection part 1302 and the lower connection part 1303 are connected by the flexible connection part, and a relative inclination between the upper connection part 1302 and the lower connection part 1303 can be achieved, thereby achieving an inclination of the flexible structure 1300.

Further, referring to fig. 4-1, the recess 1301 is formed by recessing the bottom of the upper connecting portion 1302 and forms an upper limit portion 1304 along the circumference at the bottom of the upper connecting portion 1302, the recess 1301 is formed by recessing the top of the lower connecting portion 1303 and forms a lower limit portion 1305 along the circumference at the top of the lower connecting portion 1303, when the upper connecting portion 1302 is inclined relative to the lower connecting portion 1303, the upper limit portion 1304 abuts against the lower limit portion 1305 to limit the inclination angle of the upper connecting portion 1302 relative to the lower connecting portion 1303, so that the flexible structure 1300 has a self-protection function, the flexible structure 1300 is prevented from being damaged, the flexible structure 1300 is prevented from being inclined towards the measuring range, and the bidirectional inertial inclination sensor is prevented from being damaged.

It will be appreciated that a space is left between the upper limit portion 1304 and the lower limit portion 1305, which is a space where the upper connection portion 1302 is inclined with respect to the lower connection portion 1303. Referring to fig. 4-1, the cross section of the recess 1301 is in a fan shape, and the fan shape rotates one circle around the vertical central axis of the flexible structure 1300, so that an upper limit portion 1304, a lower limit portion 1305, and the recess 1301 and the flexible connection portion can be formed in the flexible structure 1300.

1-2, the bi-directional inertial tilt sensor includes a locking member 1400 with an end of the locking member 1400 configured to abut an outer sidewall of the second base 1200 to secure the second base 1200. The locking member 1400 is provided in at least one. Specifically, locking members 1400 are provided at opposite sidewalls of the second base 1200, respectively, and the locking members 1400 are in opposite positions so that the second base 1200 is in an equilibrium state by the pressure of the locking members 1400.

Further, the locking member 1400 is screw-coupled to the sidewall of the first base 1100, and in particular, the sidewall of the first base 1100 is provided with a screw hole, and the sidewall of the locking member 1400 is provided with external screw threads.

When the bidirectional inertial tilt sensor is in operation, the abutment of the locking member 1400 against the second base 1200 is released. When the bi-directional inertial tilt sensor is being carried, the latch 1400 is abutted against the second base 1200.

In the description of the present specification, if a description appears with reference to the term "one embodiment," "some examples," "some embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples," etc., it is intended that the particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiments of the present application have been described in detail above with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application.

In the description of the present application, the patent names, if appearing ", indicate a relationship of" and "instead of a relationship of" or ". For example, patent name "a A, B", describing what is claimed in this application is: a technical scheme with a subject name A and a technical scheme with a subject name B.

Claims (8)

1. A bi-directional inertial tilt sensor, characterized by: comprising

A first base (1100), the first base (1100) being hollow forming a first mounting region;

a second base (1200), wherein a second installation area is formed in the second base (1200), and the second base (1200) is arranged in the first installation area;

-a flexible structure (1300), the flexible structure (1300) being connected to the first base (1100), the second base (1200) respectively, so that the second base (1200) is suspended from the first mounting area;

the balance beam assembly (2000), the balance beam assembly (2000) comprises a balance beam (2100) and a center base (2200), the center base (2200) is arranged in the second installation area, and one end of the balance beam (2100) is arranged in the center base (2200);

the mass center height adjusting assembly (3000), the mass center height adjusting assembly (3000) comprises a coarse adjusting assembly and a fine adjusting assembly (3100), the coarse adjusting assembly and the fine adjusting assembly (3100) are both arranged on the second base (1200), the coarse adjusting assembly is connected with the center base (2200) and can drive the center base (2200) to lift, the fine adjusting assembly (3100) comprises a first mass block (3101) and an inclined first adjusting rod (3102), the first mass block (3101) is arranged on the first adjusting rod (3102), and the first mass block (3101) is movable along the axial direction of the first adjusting rod (3102);

four balance beams (2100) are arranged on the outer side of the center base (2200) along the circumferential direction, the included angles of two adjacent balance beams (2100) are right angles, the two balance beams (2100) at opposite positions are coaxial, the trimming assemblies (3100) are 2N, N is a positive integer, N is more than or equal to 2, the trimming assemblies (3100) are arranged at opposite positions in pairs, and the trimming assemblies (3100) at opposite positions synchronously run to enable the first mass block (3101) to synchronously move upwards in an inclined manner or synchronously move downwards in an inclined manner;

the coarse adjustment assembly comprises a second adjustment rod (3201) and a lifting seat (3202), the center base (2200) is arranged on the lifting seat (3202), the second adjustment rod (3201) is connected with the lifting seat (3202), and the second adjustment rod (3201) is lifted in the second base (1200) in a spiral transmission mode so as to drive the lifting seat (3202) to move up and down; the fine adjustment assembly (3100) comprises first gears (3103), one end of each first adjustment rod (3102) is provided with each first gear (3103), the mass center height adjustment assembly (3000) comprises a bevel gear linkage structure, the bevel gear linkage structure is sleeved on the peripheral side wall of the second adjustment rod (3201), the bevel gear linkage structure comprises a second bevel gear (3301), each first gear (3103) is in meshed transmission with the second bevel gear (3301), the first adjustment rod (3102) drives the first mass block (3101) to move in a spiral transmission mode, and synchronous rotation of each first adjustment rod (3102) is achieved through meshed transmission of the second bevel gear (3301);

the bevel gear linkage structure comprises a third bevel gear (3302), the third bevel gear (3302) is positioned above the second bevel gear (3301), the first gear (3103) is arranged as a bevel gear, and the third bevel gear (3302) and the second bevel gear (3301) are both meshed with the first gear (3103); the second bevel gear (3301) and the third bevel gear (3302) have different tapers and/or the second bevel gear (3301) and the third bevel gear (3302) have different diameters.

2. The bi-directional inertial tilt sensor of claim 1, wherein: the taper of the third bevel gear (3302) is larger than that of the second bevel gear (3301), the diameter of the third bevel gear (3302) is larger than that of the second bevel gear (3301), and each first adjusting rod (3102) is inclined downwards; alternatively, the third bevel gear (3302) has a smaller taper than the second bevel gear (3301), the third bevel gear (3302) has a smaller diameter than the second bevel gear (3301), and each of the first adjustment bars (3102) is inclined upward.

3. The bi-directional inertial tilt sensor of claim 1 or 2, wherein: the number of the fine adjustment assemblies (3100) is four, the positions of the four fine adjustment assemblies (3100) correspond to the positions of the four balance beams (2100), and the fine adjustment assemblies are respectively located below the corresponding balance beams (2100).

4. A bi-directional inertial tilt sensor according to claim 3, wherein: wherein the first gear (3103) of two coaxial first adjustment rods (3102) is larger than the diameter of the first gear (3103) of the other two coaxial first adjustment rods (3102).

5. The bi-directional inertial tilt sensor of claim 1, wherein: the center base (2200) is hollow, the flexible structure (1300) is located in the center base (2200), the first base (1100) is provided with a first connecting structure (1101), the first connecting structure (1101) downwards extends from the top of the first base (1100) to the second mounting area, the upper end of the flexible structure (1300) is connected with the first connecting structure (1101), the second base (1200) is provided with a second connecting structure (1201), and the lower end of the flexible structure (1300) is connected with the second connecting structure (1201).

6. The bi-directional inertial tilt sensor of claim 1 or 5, wherein: the outer side wall of the flexible structure (1300) is provided with a concave area (1301) along the circumference, so that the flexible structure (1300) is provided with an upper connecting portion (1302) and a lower connecting portion (1303), the concave area (1301) is formed by concave forming at the bottom of the upper connecting portion (1302) and forms an upper limiting portion (1304) along the circumference at the bottom of the upper connecting portion (1302), the concave area (1301) is formed by concave forming at the top of the lower connecting portion (1303) and forms a lower limiting portion (1305) along the circumference at the top of the lower connecting portion (1303), and when the upper connecting portion (1302) is inclined relative to the lower connecting portion (1303), the upper limiting portion (1304) is abutted to the lower limiting portion (1305) to limit the inclination angle of the upper connecting portion (1302) relative to the lower connecting portion (1303).

7. The bi-directional inertial tilt sensor of claim 1, wherein: the balance beam assemblies (2000) comprise second mass blocks, the second mass blocks are arranged at the other ends of the balance beams (2100), the second mass blocks can move along the axial direction of the balance beams (2100) where the second mass blocks are located, and the second mass blocks move in a spiral transmission mode.

8. The bi-directional inertial tilt sensor of claim 1, wherein: the bidirectional inertial tilt sensor comprises a locking member (1400), wherein the locking member (1400) is in threaded connection with the side wall of the first base (1100), and the end part of the locking member (1400) is used for abutting against the outer side wall of the second base (1200) so as to fix the second base (1200).