Miniaturized shaft end of inertial platform

Abstract

The invention relates to a miniature shaft end of an inertial platform, which comprises a shaft end stator, a shaft end rotor, a bearing inner ring locking nut, a bearing outer ring locking nut, a bearing, an inner ring adjusting gasket and an outer ring adjusting gasket, and is characterized in that the shaft end stator comprises a shaft end cover, a stator and a stator pressing ring, and the shaft end rotor comprises a shaft end seat, a rotor and a rotor locking nut; the shaft end cover is connected with the fixed end, the shaft end base is connected with the rotating end, the shaft end stator and the shaft end rotor are connected through the bearing, the inner ring of the bearing is pressed on the shaft end cover, the outer ring of the bearing is pressed on the shaft end base, and the shaft end cover and the shaft end base are both of an integrated structure, so that the function of a shaft is achieved, the hole space is reasonably utilized, and the shaft end is more compact; the part thickness is effectively reduced, the element installation volume is increased, and the rotation rigidity performance and the anti-overturning capacity are improved. The shaft end serves as an independent assembly and can be directly installed on an inertial platform, the radial size and the axial size are greatly reduced, and the element installation volume effective ratio is obviously increased.

Description

Technical Field

[0001] The invention belongs to the technical field of inertial systems, and in particular relates to a miniaturized shaft end of an inertial platform. Background Art

[0002] The main function of the inertial platform is to establish a navigation coordinate system that is independent of the angular motion of the aircraft according to given technical indicators, and to provide a coordinate reference for the measurement of acceleration and attitude angles. The isolation of the internal measuring devices of the inertial platform from the angular motion of the aircraft needs to be achieved through a shaft end with a rotation function. Due to the limitations of aircraft operating conditions, the environmental adaptability requirements for inertial platforms are increasing, the size requirements are more miniaturized, and the quality requirements tend to be lightweight. Therefore, the miniaturization of the shaft end has become the key to restricting the integration and in-depth application of inertial platforms. Summary of the invention

[0003] The purpose of the present invention is to propose a miniaturized shaft end of an inertial platform, in which the shaft end cover and the shaft end seat are both of an integrated configuration, which not only realizes the function of the shaft but also reasonably utilizes the space of the hole, making the shaft end more compact. The high-rigidity section is adopted to effectively reduce the thickness of the parts, increase the component installation volume, and improve the rotational stiffness performance and anti-overturning ability.

[0004] The above object of the present invention is achieved through the following technical solutions:

[0005] A miniaturized shaft end of an inertial platform comprises a shaft end stator, a shaft end rotor, a bearing, an inner ring adjustment gasket and an outer ring adjustment gasket, wherein the shaft end stator comprises a shaft end cover, a stator and a stator pressure ring, and the shaft end rotor comprises a shaft end seat and a rotor; the shaft end cover is connected to the fixed end, the shaft end seat is connected to the rotating end, one end of the stator in the axial direction is pressed against the shaft end cover, and the other end is pressed and limited by the stator pressure ring; the rotor is connected to the shaft end seat, the shaft end stator and the shaft end rotor are connected through the bearing, the inner ring of the bearing is pressed on the shaft end cover, the outer ring is pressed on the shaft end seat, the inner ring adjustment gasket is installed between the shaft end cover and the inner ring of the bearing; the outer ring adjustment gasket is installed between the shaft end seat and the outer ring of the bearing.

[0006] The shaft end cover includes a stator positioning step, a stator fixing threaded hole, a guide shaft and an inner ring positioning step. One end of the stator is positioned by the stator positioning step, and the stator pressure ring at the other end is connected to the shaft end cover through the stator fixing threaded hole to press and fix the stator; the bearing inner ring is installed on the guide shaft, the bearing inner ring is pressed on the inner ring positioning step, and the inner ring adjustment gasket is installed between the inner ring positioning step and the bearing inner ring.

[0007] The shaft end cover also includes a threaded hole. The interior of the guide shaft is hollow, and a signal transmission device can be installed and fixed through the threaded hole.

[0008] The shaft end seat includes an outer ring guide shaft, a rotor positioning step, a guide hole and an outer ring positioning step. The rotor is installed on the outer ring guide shaft of the shaft end seat by interference fit and is positioned by the rotor positioning step. The bearing outer ring is installed in the guide hole. The bearing outer ring is pressed against the outer ring positioning step of the shaft end seat. The outer ring adjustment gasket is installed between the outer ring positioning step of the shaft end seat and the bearing outer ring.

[0009] The invention also includes a rotor locking nut, a bearing inner ring locking nut and a bearing outer ring locking nut. The shaft end cover is provided with a first guide shaft thread section, and the shaft end seat is provided with a second guide shaft thread section and a guide hole thread. The rotor locking nut cooperates with the guide shaft thread of the shaft end seat to press the rotor onto the shaft end seat. The bearing inner ring locking nut cooperates with the first guide shaft thread section through the internal thread to press the bearing inner ring onto the shaft end cover; the bearing outer ring locking nut cooperates with the guide hole thread through the external thread to press the bearing outer ring onto the shaft end seat.

[0010] The shaft end cover is provided with a plurality of long elliptical holes and a fixed end positioning surface, the shaft end seat is provided with a radial threaded hole and a rotating end positioning surface, and the shaft end cover is connected to the fixed end via the long elliptical holes and the fixed end positioning surface; a plurality of radial threaded holes are provided in the circumferential direction of the shaft end seat, and the shaft end seat is connected to the rotating end via the radial threaded holes and the rotating end positioning surface.

[0011] By fixing the long elliptical hole of the shaft end cover and applying measurement at the radial threaded hole of the shaft end seat, the maximum starting interference torque of the bearing and the maximum starting interference torque of the component after the shaft end is assembled can be obtained.

[0012] The shaft end cover includes a counterweight mounting hole, a stator observation hole and a circuit board mounting hole. Multiple counterweight mounting holes, stator observation holes and circuit board mounting holes are arranged in sequence from the inside to the outside on the end face of the shaft end cover. The counterweight mounting hole is used to realize arbitrary fixation of the counterweight parts in the axial and radial directions. The stator lead wire can be led out from the stator observation hole, and the stator can be inspected through the stator observation hole. The circuit board mounting hole can realize the overall 4-point or 2-point split installation of the circuit board.

[0013] The shaft end seat includes a rotor wire outlet hole, and the rotor wire outlet hole is used to achieve regularization of the wire harness.

[0014] The bearings are in pairs.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] (1) The shaft end cover and the shaft end seat of the present invention both adopt an integrated shaft and hole configuration, which significantly improves space utilization, achieves compact assembly and positioning of various parts, and has a small size and light weight.

[0017] (2) The present invention can be installed and disassembled as an integral component, which improves assembly processability and production efficiency. The guide shaft is hollow inside and can be installed with a fixed signal transmission device. The present invention can effectively reduce the size of parts and increase the component installation volume; it can be directly installed on the inertial platform in the form of a component, realizing integral installation and disassembly, and improving assembly processability and production efficiency.

[0018] (3) The present invention adopts paired bearings for support, thereby improving the support stiffness of the shaft system.

[0019] (4) The present invention can conveniently obtain the maximum starting interference torque of the bearing and the maximum starting interference torque after the shaft end is assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a miniaturized shaft end of an inertial platform of the present invention;

[0021] Figure 2 This is a schematic diagram of the external connection of a miniaturized shaft end of an inertial platform of the present invention;

[0022] Figure 3 This is a schematic diagram of the miniaturized shaft end of an inertial platform of the present invention;

[0023] Figure 4 It is a schematic diagram of a miniaturized shaft end cover of an inertial platform of the present invention;

[0024] Figure 5 It is a schematic diagram of a miniaturized shaft end and shaft end seat of an inertial platform of the present invention. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the miniaturized shaft end of the inertial platform includes a shaft end stator, a shaft end rotor, a bearing inner ring locking nut 7, a bearing outer ring locking nut 8, a bearing 9, an inner ring adjustment gasket 10 and an outer ring adjustment gasket 11. The shaft end stator includes a shaft end cover 1, a stator 3 and a stator pressure ring 5, and the shaft end rotor includes a shaft end seat 2, a rotor 4 and a rotor locking nut 6. The shaft end cover 1 is connected to the fixed end 13; the shaft end seat 2 is connected to the rotating end 14; one end of the stator 3 in the axial direction is close to the shaft end cover 1, and the other end is pressed and limited by the stator pressure ring 5; the rotor 4 is connected to the shaft end seat 2, the shaft end stator and the shaft end rotor are connected through the bearing 9, the inner ring of the bearing 9 is pressed on the shaft end cover 1, and the outer ring is pressed on the shaft end seat 2, the inner ring adjustment gasket 10 is installed between the shaft end cover 1 and the inner ring of the bearing 9; the outer ring adjustment gasket 11 is installed between the shaft end seat 2 and the outer ring of the bearing 9.

[0027] like Figure 4 As shown, the shaft end cover 1 includes a stator positioning step 101, a stator fixing threaded hole 102, a guide shaft 103, a first guide shaft threaded section 104, an inner ring positioning step 105, an oblong hole 106, a counterweight mounting hole 107, a threaded hole 108, a stator observation hole 109, a circuit board mounting hole 110 and a fixed end positioning surface 111. One end of the stator 3 is positioned by the stator positioning step 101, and the stator pressing ring 5 at the other end is connected to the shaft end cover 1 through the stator fixing threaded hole 102 to press and fix the stator 3; the inner ring of the bearing 9 is installed on the guide shaft 103, the inner ring of the bearing 9 is pressed at the inner ring positioning step 105, and the inner ring adjustment gasket 10 is installed between the inner ring positioning step 105 and the inner ring of the bearing 9. The guide shaft 103 is hollow inside, and a signal transmission device can be installed and fixed through the threaded hole 108. The bearing inner ring locking nut 7 is screwed with the first guide shaft threaded section 104 through the internal thread, pressing the inner ring of the bearing 9 against the inner ring positioning step 105 of the shaft end cover 1; the shaft end cover 1 is connected to the fixed end 13 through the oblong hole 106 and the fixed end positioning surface 111; a plurality of counterweight mounting holes 107, stator observation holes 109 and circuit board mounting holes 110 are arranged in sequence from the inside to the outside on the end face of the shaft end cover 1, the counterweight mounting hole 107 is used to realize arbitrary fixation of the counterweight part in the axial and radial directions, the stator lead wire can be led out from the stator observation hole 109, and the stator 3 can be inspected for morphology through the stator observation hole 109, and the circuit board mounting hole 110 can realize the overall 4-point or 2-point split installation of the circuit board.

[0028] The shaft end cover 1 adopts an integrated configuration of the end cover and the hollow shaft, which can realize the functions of a hole and a shaft. The hole function is reflected in the fact that enough space is reserved inside to install the stator 3; the inner surface of the shaft end cover 1 cooperates with the outer ring surface of the stator 3, and the axial positioning method is: one end is positioned by the stator positioning step 101, and the other end is connected to the shaft end cover threaded hole 108 through the stator pressure ring 5 for compression and fixing.

[0029] like Figure 5As shown, the shaft end seat 2 includes an outer ring guide shaft 201, a rotor positioning step 202, a second guide shaft thread section 203, a guide hole 204, an outer ring positioning step 205, a guide hole thread 206, a radial mounting hole 207, a rotor outlet hole 208 and a rotating end positioning surface 209. The rotor 4 is installed on the outer ring guide shaft 201 of the shaft end seat 2 by interference fit and is positioned by the rotor positioning step 202. The outer ring of the bearing 9 is installed in the guide hole 204, and the outer ring of the bearing 9 is pressed at the outer ring positioning step 205 of the shaft end seat 2. The outer ring adjustment gasket 11 is installed between the outer ring positioning step 205 of the shaft end seat 2 and the outer ring of the bearing 9. The rotor locking nut 6 is screwed with the guide shaft thread 203 of the shaft end seat 2 to press the rotor 4 on the shaft end seat 2. The outer ring of the bearing 9 is installed in the guide hole 204 of the shaft end seat 2, and the outer ring locking nut 8 of the bearing is screwed with the guide hole thread 206 of the shaft end seat 2 through the external thread, pressing the outer ring of the bearing 9 to the outer ring positioning step 205 of the shaft end seat 2. The shaft end seat 2 is connected to the rotating end 14 through the radial threaded hole 207 and the rotating end positioning surface 209, and the rotor outlet hole 208 is used to realize the regularization of the wiring harness.

[0030] The shaft end seat 2 adopts an inner convex step-type hollow shaft structure, which can realize the functions of sleeve and shaft. Its outer ring surface is interference fit with the inner ring surface of the rotor 4, and the axial positioning method is: one end is positioned by the rotor positioning step 202, and the other end is pressed and fixed by the rotor locking nut 6.

[0031] The shaft end stator and the shaft end rotor are connected through a pair of bearings 9. The inner ring of the bearing 9 is installed on the inner ring guide shaft 103 of the shaft end cover 1. The inner ring locking nut 7 of the bearing is screwed with the inner ring guide shaft 103 of the shaft end cover 1 through the internal thread, and the inner ring of the bearing 9 is pressed against the inner ring positioning step 105. The outer ring of the bearing 9 is installed in the guide hole 204 of the shaft end seat 2. The outer ring locking nut 8 of the bearing is screwed with the guide hole 204 of the shaft end seat 2 through the external thread, and the outer ring of the bearing 9 is pressed against the outer ring positioning step 205. The oblong hole 106 of the shaft end cover 1 is fixed, and the radial threaded hole 207 of the shaft end seat 2 is applied for measurement, so as to obtain the maximum starting interference torque of the bearing and the maximum starting interference torque of the component after the shaft end assembly is completed.

[0032] Inner ring adjustment gasket 10 and outer ring adjustment gasket 11 are selected according to the matching size to ensure the high-precision axial centering size of stator 3 and rotor 4 of ±0.02mm.

[0033] The inertial platform has a miniaturized shaft end. The assembled shaft end assembly has a diameter of 95mm, a thickness of 28mm and a weight of 0.35kg.

[0034] The above description is only the best specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

[0035] The contents not described in detail in the specification of the present invention belong to the common knowledge of the professionals in this field.

Claims

1. A miniaturized shaft end of an inertial platform, characterized in that: The invention comprises a shaft end stator, a shaft end rotor, a bearing (9), an inner ring adjustment gasket (10) and an outer ring adjustment gasket (11), wherein the shaft end stator comprises a shaft end cover (1), a stator (3) and a stator pressure ring (5), and the shaft end rotor comprises a shaft end seat (2) and a rotor (4); the shaft end cover (1) is connected to a fixed end (13), the shaft end seat (2) is connected to a rotating end (14), and one end of the stator (3) in the axial direction is closely attached to the shaft end cover (1). The other end is clamped and limited by the stator pressure ring (5); the rotor (4) is connected to the shaft end seat (2), the shaft end stator and the shaft end rotor are connected through the bearing (9), the inner ring of the bearing (9) is pressed on the shaft end cover (1), and the outer ring is pressed on the shaft end seat (2), the inner ring adjustment gasket (10) is installed between the shaft end cover (1) and the inner ring of the bearing (9); the outer ring adjustment gasket (11) is installed between the shaft end seat (2) and the outer ring of the bearing (9).

2. The miniaturized shaft end of an inertial platform according to claim 1, characterized in that: The shaft end cover (1) comprises a stator positioning step (101), a stator fixing threaded hole (102), a guide shaft (103) and an inner ring positioning step (105); one end of the stator (3) is positioned by the stator positioning step (101); the stator pressing ring (5) at the other end is connected to the shaft end cover (1) through the stator fixing threaded hole (102) to press and fix the stator (3); the inner ring of the bearing (9) is installed on the guide shaft (103), the inner ring of the bearing (9) is pressed on the inner ring positioning step (105), and the inner ring adjusting gasket (10) is installed between the inner ring positioning step (105) and the inner ring of the bearing (9).

3. The miniaturized shaft end of an inertial platform according to claim 2, characterized in that: The shaft end cover (1) further comprises a threaded hole (108); the interior of the guide shaft (103) is hollow, and a signal transmission device can be installed and fixed through the threaded hole (108).

4. The miniaturized shaft end of an inertial platform according to claim 1, characterized in that: The shaft end seat (2) comprises an outer ring guide shaft (201), a rotor positioning step (202), a guide hole (204) and an outer ring positioning step (205); the rotor (4) is mounted on the outer ring guide shaft (201) of the shaft end seat (2) by interference fit and is positioned by the rotor positioning step (202); the outer ring of the bearing (9) is mounted in the guide hole (204); the outer ring of the bearing (9) is pressed against the outer ring positioning step (205) of the shaft end seat (2); and the outer ring adjustment gasket (11) is mounted between the outer ring positioning step (205) of the shaft end seat (2) and the outer ring of the bearing (9).

5. The miniaturized shaft end of an inertial platform according to claim 1, characterized in that: The invention also comprises a rotor locking nut (6), a bearing inner ring locking nut (7) and a bearing outer ring locking nut (8); a first guide shaft thread section (104) is arranged on the shaft end cover (1); a second guide shaft thread section (203) and a guide hole thread (206) are arranged on the shaft end seat (2); the rotor locking nut (6) cooperates with the guide shaft thread (203) of the shaft end seat (2) to press the rotor (4) onto the shaft end seat (2); the bearing inner ring locking nut (7) cooperates with the first guide shaft thread section (104) via an internal thread to press the inner ring of the bearing (9) onto the shaft end cover (1); and the bearing outer ring locking nut (8) cooperates with the guide hole thread (206) via an external thread to press the outer ring of the bearing (9) onto the shaft end seat (2).

6. The miniaturized shaft end of an inertial platform according to claim 1, characterized in that: The shaft end cover (1) is provided with a plurality of oblong holes (106) and a fixed end positioning surface (111); the shaft end seat (2) is provided with a radial threaded hole (207) and a rotating end positioning surface (209); the shaft end cover (1) is connected to the fixed end (13) via the oblong holes (106) and the fixed end positioning surface (111); a plurality of radial threaded holes (207) are provided in the circumferential direction of the shaft end seat (2); the shaft end seat (2) is connected to the rotating end (14) via the radial threaded holes (207) and the rotating end positioning surface (209).

7. The miniaturized shaft end of an inertial platform according to claim 6, characterized in that: By fixing the oblong hole (106) of the shaft end cover (1) and applying measurement at the radial threaded hole (207) of the shaft end seat (2), the maximum starting interference torque of the bearing and the maximum starting interference torque of the component after the shaft end is assembled can be obtained.

8. The miniaturized shaft end of an inertial platform according to claim 1, characterized in that: The shaft end cover (1) comprises a counterweight mounting hole (107), a stator observation hole (109) and a circuit board mounting hole (110). The counterweight mounting holes (107), the stator observation hole (109) and the circuit board mounting hole (110) are arranged in sequence from the inside to the outside on the end surface of the shaft end cover (1). The counterweight mounting hole (107) is used to realize arbitrary fixing of the counterweight part in the axial direction and radial direction. The stator lead wire can be led out from the stator observation hole (109), and the stator (3) can be inspected for shape through the stator observation hole (109). The circuit board mounting hole (110) can realize the four-point installation of the circuit board as a whole or the two-point split installation.

9. The miniaturized shaft end of an inertial platform according to claim 1, characterized in that: The shaft end seat (2) comprises a rotor wire outlet hole (208), and the rotor wire outlet hole (208) is used to achieve regularization of the wire harness.

10. The miniaturized shaft end of an inertial platform according to claim 1, characterized in that: The bearings (9) are paired bearings.

Images