A design method for a gyroscope structure

Abstract

The present invention introduces a design method for a gyroscope structure. The upper end of the central bearing mounting hole of the gyroscope assembly base body is set as a semi-closed circular ring blocking structure. An opening is provided in the center of the semi-closed circular ring blocking to form a hollow form. The mounting surface of the upper bearing is used as the only mounting and fixing reference surface. An air gap is provided between the flange of the semi-closed circular ring blocking and the top end face of the signaler magnetic core assembly of the top layer. The inner and outer bushings are both separable self-adjusting components, and their lengths should keep the overall dimensions of the miniaturized gyroscope design unchanged. The design method of this application ensures the original design accuracy of the miniaturized gyroscope product and simplifies the fitting and installation processes; the structure of this method can clearly quantify the coaxial accuracy of the bearing holes and is convenient for the fitting and installation of the bearing holes; when performing differential fitting, a precision bench drill and a precision rolling tool are used, and the surface finish after grinding can reach Ra0.1 level.

Description

Technical Field

[0001] The present invention belongs to the field of inertial measurement technology, and relates to an improvement in the structural design of a dynamically tuned gyroscope, especially a design method for the gyroscope structure, which is used to solve the problem of precise transmission of the transmission shaft system of the dynamically tuned gyroscope. Background Art

[0002] The dynamically tuned gyroscope generates gyroscopic characteristics through the high-speed rotation of the magnetic induction rotor. Therefore, a high-precision and stable transmission shaft system is the core component of the gyroscope.

[0003] The high-speed bearings of the dynamically tuned gyroscope adopt a thrust preloaded bearing design. The preload force is obtained through the size difference of the bushings between the inner and outer rings of the bearings, so that the two pairs of bearings are tightly combined together. Then, the driving shaft drives the magnetic induction flywheel to rotate at high speed to generate gyroscopic characteristics.

[0004] With the miniaturization trend of the dynamically tuned gyroscope, the gyroscope structure cannot install the fixed covers at both ends of the bearing holes to adapt to the reduction of the internal space. Instead, a central boss is machined inside the bearing holes of the gyroscope assembly base body to replace the fixed center with the outer ring cover of the bearing assembly. Then, the bearing assemblies are installed at both ends of the central boss respectively, and the fixed covers at both ends are cancelled. Only the bearing inner ring bushings are used to adjust the bearing preload force to lock the position, so as to maintain the normal operation of the bearings.

[0005] However, the defect of this design is that the bearing mounting holes at both ends of the fixed center of the central boss of the bearing hole of the gyroscope assembly base body form two blind hole forms, which cannot be machined coaxially as a whole. In fact, two bearing mounting holes and two mounting reference planes are formed, which have an impact on the concentricity deviation accuracy of the transmission shaft system passing through the two bearing mounting holes. At the same time, the end face of the fixed center of the central boss will also damage the vertical angle of the bearing mounting hole diameter during the later repair and assembly of the gyroscope, making the preload force of the bearing an unknown state, which is very likely to cause damage to the bearing during high-speed operation, and then make the gyro motor inaccurate.

[0006] As the prior art improved by this patent, the basic structure of the miniaturized dynamically tuned gyroscope includes an assembly base body, a signaler magnetic core assembly on the top layer of the assembly base, an internal bearing assembly, and an adjustment assembly for the bearing preload force, namely inner and outer bearing bushings. Among them, the assembly base body is the core, and other components are all arranged around the assembly base.

[0007] Two pairs of high-speed bearing assemblies are fixedly installed at both ends of the bearing holes of the gyroscope assembly base body. Between the bearings is an adjustment bushing assembly for adjusting the bearing preload force. The transmission shaft passes through the centers of the bearing assembly and the adjustment bushing assembly to transmit the rotational torque to the gyroscope rotor. Summary of the Invention

[0008] The technical problem solved by the present invention is to provide a design method for a gyroscope structure. By using a new structure of concentric bearing through-holes processed in a one-way integrated manner on the gyroscope assembly base body and installing and adjusting multiple parts in combination, a reference fixed center for bearing installation is established to avoid the influence of the gyroscope rotation shaft system offset accuracy caused by the miniaturized structure; solve the random uncontrollable hidden dangers under the old structure mode, and ensure the overall design accuracy of the gyroscope.

[0009] In order to achieve the purpose of solving the above technical problems, the present invention adopts the following technical solutions:

[0010] A design method for a gyroscope structure, the gyroscope structure includes an assembly base body, a signaler magnetic core assembly on the top layer of the assembly base, and inner and outer bearing bushes. A bearing installation hole is provided at the center inside the base. Among them, the inner and outer bearing bushes are adjustment components for the bearing preload force; the bearings are high-speed bearing components, which are respectively installed at both ends of the bearing hole in the upper and lower positions, that is, the upper bearing and the lower bearing;

[0011] The design method includes the following contents:

[0012] (1). Set the upper end of the bearing installation hole at the center of the gyroscope assembly base body as a semi-closed circular ring blocking structure, and the semi-closed circular ring blocking and the base body are of an integrated structure; the semi-closed circular ring blocking is a semi-closed flange structure, which constitutes the reference surface for the fixed installation center of the upper bearing; the upper bearing is installed with the semi-closed circular ring blocking as the fixed center; the lower end of the bearing installation hole is an open structure;

[0013] (2). An opening is provided at the center of the semi-closed circular ring blocking, forming a hollow form. The size of the opening should be convenient for the transmission shaft to pass through, and can fix the outer ring of the upper bearing so as not to slide out of the bearing installation hole at the center of the base body, and is convenient for loading and unloading other components except the outer ring of the bearing;

[0014] (3). The high-speed bearing components and preload force adjustment components inside the gyroscope are all loaded from the open lower port of the bearing installation hole of the gyroscope assembly base body. First, load the upper bearing component to the flange of the semi-closed circular ring blocking as the only reference surface, and then, based on the installation position of the upper bearing, sequentially load the inner and outer bushes for adjusting the preload force self-adjustment component, and finally load the lower bearing component, so that the inner bush and the outer bush are between the two sets of bearing components;

[0015] The two sets of bearings are connected with the inner bush and the outer bush in a back-to-back form. After assembly, the flange of the upper semi-closed circular ring blocking is used as the only installation and fixing surface, and the size difference between the inner and outer bushes between the upper bearing and the lower bearing components is used to adjust the established bearing preload force;

[0016] (4) The installation and fixing surface of the above bearings is the only reference surface, and the only reference surface is coordinated with the installation reference surfaces of other components of the base body, so as to ensure the installation accuracy of the bearings.

[0017] (5) There is an air gap between the flange of the semi-closed circular ring baffle and the top end face of the signaler magnetic core assembly of the top layer. The size of the air gap shall be based on not affecting the signal acquisition process between the gyro rotor and the signaler magnetic core assembly during high-speed rotation.

[0018] (6) The inner and outer bushings that cooperate with the upper bearing and the lower bearing assembly to adjust the preload force are both separable self-adjusting components, which are independently installed between the inner and outer rings of the two pairs of bearings respectively. Their nominal dimensional lengths are limited to keep the overall dimensions of the miniaturized gyroscope design unchanged.

[0019] The characteristics of the design method of the gyroscope structure of this application are as follows:

[0020] 1. The upper bearing and the lower bearing are located in the same installation hole, and the concentricity of the upper bearing and the lower bearing is determined by the only installation reference surface, which thoroughly ensures the precision requirements of coaxiality.

[0021] 2. The inner and outer bushings that cooperate with the upper bearing and the lower bearing assembly are both separable self-adjusting components, and the selection range is relatively wide.

[0022] 3. One end of the bearing installation hole of the assembly base body is semi-closed and fixed, which can maximize the stability of the bearing working state.

[0023] 4. The flange of the integrated semi-closed circular ring baffle is an open-hole structure, which is convenient for the loading and unloading of other bearing components.

[0024] 5. Cancel the central positioning boss in the bearing installation hole of the assembly base body in the prior art, and make the bearing installation hole become a straight through hole. The straight through bearing installation hole form is more convenient for differential precision grinding of the bearing. When using a precision rolling cutter for differential individual repair, the end face of the cutter blade can be precisely ground to the inner wall of the entire bearing hole to ensure the overall repair size of the bearing installation position.

[0025] 6. This structure does not have any impact on the technical requirements for the overall miniaturization of the dynamically tuned gyroscope.

[0026] Through the above technical solutions, the advantages of the design method of the gyroscope structure of this application are as follows:

[0027] 1. This design makes more use of mechanized processing means to fundamentally eliminate the disadvantages of the original operation method, highly ensures the original design accuracy of the miniaturized gyroscope product, and simplifies the repair and installation processes.

[0028] II. Before adopting this structural form, the coaxiality of the gyroscope bearing installation and the differential reaming fit could only be judged and operated based on manual experience. The true operating state of the bearing and the transmission shaft could not be determined and could only be detected during the trial operation after the overall assembly of the gyroscope, which was quite blind.

[0029] After adopting the structure involved in the design method of the gyroscope structure, the coaxial accuracy of the bearing holes can be clearly quantified, and the reaming and installation of the bearing holes are convenient, fundamentally eliminating technical hidden dangers.

[0030] III. When performing differential reaming and fitting, the traditional manual operation method with a grinding bar is abandoned. A precision bench drill and a precision rolling cutter are used. The accuracy of the bearing installation hole can be increased in increments of 0.001 mm, and the surface finish after reaming can reach Ra0.1 level. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the inner bushing.

[0032] Figure 2 It is a schematic structural diagram of the outer bushing.

[0033] Figure 3 It is the original product structure diagram. In the figure, A is the air gap; E is the upper bearing, and F is the lower bearing; GH is the reference surface of the upper bearing, and KL is the reference surface of the lower bearing.

[0034] Figure 4 It is the technical solution diagram of the present invention. In the figure, B is the air gap, E is the upper bearing, and F is the lower bearing; CD is the first reference surface.

[0035] Figure 5 The overall structural schematic diagram of the gyroscope of the present invention. In the figure, B is the air gap, CD is the first reference surface; E is the upper bearing, F is the lower bearing, M is the inner bushing, N is the outer bushing, and P is the locking nut. DETAILED DESCRIPTION OF THE INVENTION

[0036] The present patent will be further explained below with reference to the accompanying drawings. However, the protection scope of the present patent is not limited to the specific embodiments.

[0037] Embodiment 1

[0038] As Figures 1-5 shown, a design method of a gyroscope structure of the present patent, the gyroscope structure includes an assembly base body, a signal core component on the top layer of the assembly base, a bearing component at the center inside the base body, and inner and outer bearing bushings, where the inner and outer bearing bushings are components for adjusting the bearing preload force; the bearings are high-speed bearing components, which are respectively installed at both ends of the bearing holes of the base body in the upper and lower positions, that is, the upper bearing E and the lower bearing F.

[0039] The design method includes the following contents:

[0040] (1). Set the upper end of the bearing installation hole of the gyroscope assembly base body as a semi-closed circular ring structure. The semi-closed circular ring and the base body are of an integrated structure. The semi-closed circular ring is a semi-closed flange structure, constituting the only installation and fixing reference plane CD of the upper bearing E. The semi-closed circular ring serves as the fixed center for bearing installation. The lower end of the bearing installation hole is an open structure.

[0041] (2). An opening is provided in the center of the flange of the semi-closed circular retaining ring to form a hollow form. The size of the opening should allow the transmission shaft to pass through and facilitate the installation of the bearing assembly.

[0042] By opening a relatively large opening in the center of the flange of the semi-closed circular retaining ring of the gyroscope base body to form a hollow form, it is convenient for the transmission shaft to pass through and for loading and unloading the bearing assembly and for combining and adjusting the bearing preload force parts. And it can fix the outer ring of the upper bearing E so that it will not slip out of the center bearing installation hole of the base body, and it is also convenient for loading and unloading other components except the outer ring of the bearing.

[0043] (3). The bearing assembly and the preload force adjustment components inside the gyroscope are all loaded from the open lower port of the bearing installation hole of the gyroscope assembly base body. After assembly, the flange of the upper semi-closed circular retaining ring is used as the installation and fixing center, and the inner and outer rings of the upper bearing E and the lower bearing F are used to cooperate with the size difference between the inner and outer bushings between the bearings to self-adjust the established bearing preload force.

[0044] By loading the two pairs of bearings from the open end below the assembly base body in sequence, first the upper one and then the lower one, and adopting the back-to-back installation form. The inner and outer bushing parts for preload force adjustment are placed between the upper bearing E and the lower bearing F.

[0045] (4). The installation and fixing surface of the upper bearing E is the only reference plane CD, and the only reference plane CD is kept coordinated and consistent with the installation reference planes of other components of the base body. Only in this way can the installation accuracy of the bearing be ensured.

[0046] (5). There is an air gap B between the flange of the integrated semi-closed circular retaining ring and the top end face of the uppermost signaler magnetic core assembly. The size of the air gap B is based on not affecting the signal acquisition process between the gyroscope rotor and the signaler magnetic core assembly during high-speed rotation.

[0047] (6). The nominal dimension lengths of the self-adjusting inner and outer bushing components between the upper bearing E and the lower bearing F assemblies are 7.35 mm and 7 mm respectively, so as to keep the overall design size of the gyroscope unchanged.

Claims

1. A design method of a gyroscope structure, the gyroscope structure including an assembly base body, a signaler magnetic core assembly on the uppermost layer of the assembly base, and inner and outer bearing bushes. A bearing installation hole is provided at the center inside the base. Among them, the inner and outer bearing bushes are components for adjusting the bearing preload force; the bearings are high-speed bearing assemblies, which are respectively installed at the two ends of the bearing hole in the upper and lower positions, that is, the upper bearing (E) and the lower bearing (F); the characteristics are: The design method includes the following contents: (1). Set the upper end of the bearing installation hole at the center of the gyroscope assembly base body as a semi-closed circular ring blocking structure. The semi-closed circular ring blocking and the base body are an integral structure. The semi-closed circular ring blocking is a semi-closed flange structure, constituting the only installation and fixing reference surface (CD) of the upper bearing (E). The upper bearing (E) is installed with the semi-closed circular ring blocking as the fixed center. The lower end of the bearing installation hole is an open structure; (2). An opening is provided in the center of the semi-closed circular ring blocking to form a hollow form. The size of the opening should facilitate the transmission shaft to pass through, and can fix the outer ring of the upper bearing (E) so that it does not slip out of the bearing installation hole at the center of the base body, and is convenient for loading and unloading other components except the outer ring of the bearing; (3). The high-speed bearing assembly and the preload force adjustment component inside the gyroscope are both loaded from the open lower port of the bearing installation hole of the gyroscope assembly base body. First, load the upper bearing (E) assembly to the flange of the semi-closed circular ring blocking as the only reference surface (CD), and then, based on the installation position of the upper bearing (E), sequentially load the inner and outer bushings of the preload force self-adjustment component, and finally load the lower bearing (F) assembly, so that the inner bushing (M) and the outer bushing (N) are between the two bearing assemblies; The two bearings are connected with the inner bushing (M) and the outer bushing (N) in a back-to-back form. After assembly, the flange of the upper semi-closed circular ring blocking forms the only installation and fixing surface (CD). The size difference between the inner and outer bushings between the upper bearing (E) and the lower bearing (F) assemblies is used to adjust the established bearing preload force; (4). Take the installation and fixing surface of the upper bearing (E) as the only reference surface (CD), and the only reference surface (CD) is coordinated with the installation reference surfaces of other components of the base body; only in this way can the installation accuracy of the bearing be ensured; (5). There is an air gap (B) between the flange of the semi-closed circular ring blocking and the top end face of the signaler magnetic core assembly at the top layer. The size of the air gap (B) is based on not affecting the signal acquisition process between the gyroscope rotor and the signaler magnetic core assembly during high-speed rotation; (6). The inner and outer bushings for cooperating with the upper bearing (E) and the lower bearing (F) assemblies to adjust the preload force are both separable self-adjustment components, and are respectively independently installed between the inner and outer rings of the two bearings. The nominal dimension length of the inner and outer bushings is limited to keep the overall dimension of the miniaturized design of the gyroscope unchanged.

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