Inertial platform miniaturized shaft end

Abstract

The present application relates to a kind of inertia platform miniaturization shaft end, including shaft end stator, shaft end rotor, bearing inner ring locking nut, bearing outer ring locking nut, bearing, inner ring adjusting washer and outer ring adjusting washer, wherein shaft end stator includes shaft end cover, stator, stator pressing ring, shaft end rotor includes shaft end seat, rotor, rotor locking nut;Shaft end cover is connected with fixed end, shaft end seat is connected with rotating end, shaft end stator and shaft end rotor are connected by bearing, bearing inner ring is pressed on shaft end cover, outer ring is pressed on shaft end seat, shaft end cover, shaft end seat are all used integral configuration, both realize the function of shaft and reasonably utilize the space of hole, make shaft end more compact, effectively reduce the thickness of part, increase component installation volume, improve rotation rigidity performance and anti-overturning ability.The shaft end as independent assembly, can be directly installed in inertia platform, radial and axial dimension is greatly reduced, and component installation volume is effectively significantly increased.

Description

Technical Field

[0001] This invention belongs to the field of inertial system technology, specifically relating to a miniaturized shaft end of an inertial platform. Background Technology

[0002] The primary function of an inertial platform is to establish a navigation coordinate system independent of the aircraft's angular motion, according to given technical specifications, providing a coordinate reference for the measurement of acceleration and attitude angles. Isolation of the inertial platform's internal measuring devices from the aircraft's angular motion is achieved through a rotating shaft. Due to limitations imposed by aircraft operating conditions, the environmental adaptability requirements for inertial platforms are increasingly stringent, with demands for miniaturization and weight reduction. Therefore, the miniaturization of the shaft has become a key factor restricting the integration and in-depth application of inertial platforms. Summary of the Invention

[0003] The purpose of this invention is to propose a miniaturized shaft end for an inertial platform. The shaft end cap and shaft end seat are both integrally designed, achieving both the function of the shaft and making efficient use of the hole space, resulting in a more compact shaft end. A high-rigidity cross-section is employed, effectively reducing component thickness, increasing component mounting volume, and improving rotational stiffness and anti-overturning capabilities.

[0004] The above-mentioned objective of the present invention is achieved through the following technical solution:

[0005] A miniaturized shaft end for an inertial platform includes a shaft end stator, a shaft end rotor, bearings, an inner ring adjusting shim, and an outer ring adjusting shim. The shaft end stator includes a shaft end cover, a stator, and a stator retaining ring. The shaft end rotor includes a shaft end seat and a rotor. The shaft end cover is connected to a fixed end, and the shaft end seat is connected to a rotating end. One end of the stator is pressed against the shaft end cover in the axial direction, and the other end is pressed and limited by the stator retaining ring. The rotor is connected to the shaft end seat. The shaft end stator and the shaft end rotor are connected by bearings. The inner ring of the bearing is pressed against the shaft end cover, and the outer ring is pressed against the shaft end seat. The inner ring adjusting shim is installed between the shaft end cover and the inner ring of the bearing. The outer ring adjusting shim 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 other end of the stator pressure ring 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 and pressed against the inner ring positioning step. The inner ring adjusting shim is installed between the inner ring positioning step and the bearing inner ring.

[0007] The shaft end cover also includes a threaded hole. The guide shaft is hollow inside, 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 mounted on the outer ring guide shaft of the shaft end seat by an interference fit and is positioned by the rotor positioning step. The bearing outer ring is installed in the guide hole and pressed against the outer ring positioning step of the shaft end seat. An outer ring adjusting shim is installed between the outer ring positioning step of the shaft end seat and the bearing outer ring.

[0009] It 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 engages 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 engages with the first guide shaft thread section through its internal thread to press the bearing inner ring onto the shaft end cover. The bearing outer ring locking nut engages with the guide hole thread through its external thread to press the bearing outer ring onto the shaft end seat.

[0010] The shaft end cover is provided with multiple elongated elliptical holes and a fixed end positioning surface, and the shaft end seat is provided with radial threaded holes and a rotating end positioning surface. The shaft end cover is connected to the fixed end through the elongated elliptical holes and the fixed end positioning surface; the multiple 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 through the radial threaded holes and the rotating end positioning surface.

[0011] By fixing the elongated elliptical hole of the shaft end cap and applying a 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 assembly after the shaft end is assembled can be obtained.

[0012] The shaft end cover includes counterweight mounting holes, stator observation holes, and circuit board mounting holes. Multiple counterweight mounting holes, stator observation holes, and circuit board mounting holes are arranged sequentially from the inside to the outside on the end face of the shaft end cover. The counterweight mounting holes are used to fix the counterweight parts arbitrarily along the axial and radial directions. The stator lead wires can be led out from the stator observation holes, and the stator can be inspected for its morphology through the stator observation holes. The circuit board mounting holes can realize the overall 4-point or 2-point split installation of the circuit board.

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

[0014] The bearings are paired bearings.

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

[0016] (1) The shaft end cover and shaft end seat of the present invention adopt the integrated structure of shaft and hole, which significantly improves the space utilization rate, realizes the compact assembly and positioning of each part, and is small in size and light in weight.

[0017] (2) This invention can be installed and disassembled as a whole component, improving assembly processability and production efficiency. The guide shaft is hollow inside, allowing for the installation of fixed signal transmission devices. This invention can effectively reduce the size of parts and increase the component installation volume; it can be directly installed on the inertial platform as a component, realizing integrated installation and disassembly, thus improving assembly processability and production efficiency.

[0018] (3) The present invention uses paired bearings for support, which improves 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 assembly is completed. Attached Figure Description

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

[0021] Figure 2 This is a schematic diagram illustrating the external connection of a miniaturized inertial platform shaft end according to the present invention.

[0022] Figure 3 This is an exploded view of the miniaturized shaft end of an inertial platform according to the present invention;

[0023] Figure 4 This is a schematic diagram of a miniaturized shaft end cap for an inertial platform according to the present invention;

[0024] Figure 5 This is a schematic diagram of a miniaturized shaft end mount for an inertial platform according to the present invention. Detailed Implementation

[0025] The present invention will now be described in further detail 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 adjusting shim 10, and an outer ring adjusting shim 11. The shaft end stator includes a shaft end cover 1, a stator 3, and a stator pressure ring 5. 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 is pressed against the shaft end cover 1 in the axial direction, 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 by the bearing 9, the inner ring of the bearing 9 is pressed against the shaft end cover 1, and the outer ring is pressed against the shaft end seat 2; the inner ring adjusting shim 10 is installed between the shaft end cover 1 and the inner ring of the bearing 9; the outer ring adjusting shim 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 elongated elliptical 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 other end, the stator pressure ring 5, 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 mounted on the guide shaft 103 and pressed against the inner ring positioning step 105. An inner ring adjusting shim 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 can be used to install and fix a signal transmission device through the threaded hole 108. The bearing inner ring locking nut 7 engages with the first guide shaft thread section 104 through its 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 elongated elliptical hole 106 and the fixed end positioning surface 111. Multiple counterweight mounting holes 107, stator observation holes 109, and circuit board mounting holes 110 are arranged sequentially from the inside to the outside on the end face of the shaft end cover 1. The counterweight mounting holes 107 are used to achieve arbitrary fixing of the counterweight parts along 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. The circuit board mounting holes 110 can achieve 4-point or 2-point split installation of the circuit board.

[0028] The shaft end cover 1 adopts an integrated structure of end cover and hollow shaft, which can realize both hole and shaft functions. The hole function is reflected in the sufficient space reserved inside to install stator 3; the inner surface of shaft end cover 1 fits with the outer ring surface of stator 3, and the axial positioning method is: one end is positioned by stator positioning step 101, and the other end is connected to the threaded hole 108 of shaft end cover through stator pressure ring 5 for clamping 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 threaded 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 mounted on the outer ring guide shaft 201 of the shaft end seat 2 by an 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 pressed against the outer ring positioning step 205 of the shaft end seat 2. An outer ring adjusting shim 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 into the guide shaft thread 203 of the shaft end seat 2, pressing the rotor 4 onto the shaft end seat 2. The outer ring of bearing 9 is installed in the guide hole 204 of shaft end seat 2. The outer ring locking nut 8 of bearing is screwed into the guide hole thread 206 of shaft end seat 2 through external thread, pressing the outer ring of bearing 9 against the outer ring positioning step 205 of shaft end seat 2. Shaft end seat 2 is connected to rotating end 14 through radial threaded hole 207 and rotating end positioning surface 209. The rotor outlet hole 208 is used to realize the regularization of wire harness.

[0030] The shaft end seat 2 adopts an internally convex stepped hollow shaft structure, which can realize the functions of both sleeve and shaft. Its outer ring surface is interference-fitted with the inner ring surface of the rotor 4. 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 stator and rotor at the shaft end are connected by a pair of bearings 9. The inner ring of the bearing 9 is mounted on the inner ring guide shaft 103 of the shaft end cover 1. The inner ring locking nut 7 of the bearing is screwed into the inner ring guide shaft 103 of the shaft end cover 1 through its internal thread, pressing the inner ring of the bearing 9 against the inner ring positioning step 105. The outer ring of the bearing 9 is mounted in the guide hole 204 of the shaft end seat 2. The outer ring locking nut 8 of the bearing is screwed into the guide hole 204 of the shaft end seat 2 through its external thread, pressing the outer ring of the bearing 9 against the outer ring positioning step 205. By fixing the elongated elliptical hole 106 of the shaft end cover 1 and applying a 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 assembly after the shaft end is assembled can be obtained.

[0032] Based on the matching dimensions, inner ring adjusting shim 10 and outer ring adjusting shim 11 are selected to ensure that the stator 3 and rotor 4 are aligned with a high axial precision of ±0.02mm.

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

[0034] The above description is only the best specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the protection scope of the present invention.

[0035] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A miniaturized gimbal shaft end, characterized by: The motor comprises an axial end stator, an axial end rotor, a bearing (9), an inner ring adjusting gasket (10) and an outer ring adjusting gasket (11), wherein the axial end stator comprises an axial end cover (1), a stator (3) and a stator pressing ring (5), and the axial end rotor comprises an axial end seat (2) and a rotor (4); the axial end cover (1) is connected with a fixed end (13), the axial end seat (2) is connected with a rotating end (14), one end of the stator (3) is tightly attached to the axial end cover (1) in the axial direction, and the other end is tightly limited by the stator pressing ring (5); the rotor (4) is connected with the axial end seat (2), the axial end stator and the axial end rotor are connected through the bearing (9), the inner ring of the bearing (9) is tightly pressed on the axial end cover (1), the outer ring is tightly pressed on the axial end seat (2), and the inner ring adjusting gasket (10) is installed between the axial end cover (1) and the inner ring of the bearing (9); the outer ring adjusting gasket (11) is installed between the axial end seat (2) and the outer ring of the bearing (9). The axial 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 other end of the stator (3) is connected with the axial end cover (1) through the stator fixing threaded hole (102) by the stator pressing ring (5), and the stator (3) is tightly fixed; the inner ring of the bearing (9) is installed on the guide shaft (103), the inner ring of the bearing (9) is tightly pressed at 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). The axial 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 installed on the outer ring guide shaft (201) of the axial 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), the outer ring of the bearing (9) is tightly pressed at the outer ring positioning step (205) of the axial end seat (2), and the outer ring adjusting gasket (11) is installed between the outer ring positioning step (205) of the axial end seat (2) and the outer ring of the bearing (9).

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

3. A miniaturized shaft end of an inertial platform according to claim 1, characterized in that: The motor further comprises a rotor locking nut (6), a bearing inner ring locking nut (7) and a bearing outer ring locking nut (8), the axial end cover (1) is provided with a first guide shaft threaded section (104), the axial end seat (2) is provided with a second guide shaft threaded section (203) and a guide hole thread (206), the rotor locking nut (6) is matched with the second guide shaft threaded section (203) to tightly press the rotor (4) on the axial end seat (2), the bearing inner ring locking nut (7) is matched with the first guide shaft threaded section (104) through an internal thread to tightly press the inner ring of the bearing (9) on the axial end cover (1), and the bearing outer ring locking nut (8) is matched with the guide hole thread (206) through an external thread to tightly press the outer ring of the bearing (9) on the axial end seat (2).

4. 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 long oval holes (106) and fixed end positioning surfaces (111), the shaft end seat (2) is provided with radial threaded holes (207) and rotating end positioning surfaces (209), the shaft end cover (1) is connected with the fixed end (13) through the long oval holes (106) and the fixed end positioning surfaces (111); the plurality of radial threaded holes (207) are arranged in the circumferential direction of the shaft end seat (2), and the shaft end seat (2) is connected with the rotating end (14) through the radial threaded holes (207) and the rotating end positioning surfaces (209).

5. A miniaturized shaft end of an inertial platform according to claim 4, characterized in that: The long oval hole (106) of the fixed shaft end cover (1) is measured at the radial threaded hole (207) of the shaft end seat (2), so that the maximum starting disturbance torque of the bearing and the maximum starting disturbance torque of the assembly after the shaft end assembly are obtained.

6. A 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), and the plurality of counterweight mounting holes (107), the stator observation hole (109) and the circuit board mounting hole (110) are sequentially arranged from inside to outside on the end face of the shaft end cover (1); the counterweight mounting hole (107) is used for realizing arbitrary fixing of a counterweight part in the axial and radial directions, a stator lead wire can be led out from the stator observation hole (109) and the appearance of the stator (3) is checked through the stator observation hole (109), and the circuit board mounting hole (110) can realize 4-point integral or 2-point split mounting of a circuit board.

7. A miniaturized shaft end of an inertial platform according to claim 1, characterized in that: The shaft end seat (2) comprises a rotor lead-out hole (208), and the rotor lead-out hole (208) is used for realizing regularization of a wire harness.

8. A miniaturized shaft end of an inertial platform according to claim 1, characterized in that: The bearing (9) is a pair of bearings.

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