Reaction flywheel line box
By designing a reaction flywheel circuit box, the problem of the reaction flywheel circuit easily burning out the spacecraft busbar was solved, achieving external protection and ease of assembly, and improving the safety and reliability of the spacecraft.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI ZHONGCHEN XINWEI AEROSPACE TECHNOLOGY CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-06-26
AI Technical Summary
In existing technologies, the reaction flywheel is prone to the problem of surge current burning out the spacecraft busbar when connected to external wiring under special conditions.
Design a reaction flywheel circuit box, including a base, cover plate, PCB board and connectors, which is fixed to the spacecraft by mounting ears. The split design and the matching of arc protrusions and notches prevent incorrect soldering direction and provide independent external protection for the spacecraft busbar.
It effectively prevents the spacecraft busbar from burning out when the flywheel operating current fails, improves the spacecraft's design redundancy and assembly efficiency, and ensures the stability and reliability of the circuit box.
Smart Images
Figure CN224418369U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of spacecraft attitude control technology, and more specifically, to a reaction flywheel circuit box. Background Technology
[0002] The reaction flywheel is the core actuator of the satellite attitude control system. It achieves precise adjustment of the satellite's three-axis attitude through the change of angular momentum of the high-speed rotor. A typical spacecraft contains at least three reaction flywheels, and the spacecraft communicates with the reaction flywheels through power lines and communication buses.
[0003] However, in spacecraft with special requirements, the reaction flywheel currently used requires an external fuse circuit, which can lead to surge current in the circuit burning out the busbar under special conditions.
[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content
[0005] The purpose of this utility model is to provide a reaction flywheel circuit box, which serves as an external protection circuit device to prevent the spacecraft busbar from burning out when the flywheel operating current fails. The separate design facilitates production.
[0006] This utility model provides a reaction flywheel circuit box, including a base, a cover plate, a PCB board, and connectors. The base is a rectangular parallelepiped with a hollow interior and an open top. Two mounting notches are provided on both the front and rear sides of the base, and the mounting notches on the front and rear sides are symmetrically arranged. The cover plate is rectangular, with two protrusions vertically connected to the front and rear edges of the cover plate. The cover plate covers the upper opening of the base, and the four protrusions are inserted into the mounting notches. An aerospace connector interface is formed between the lower end of the protrusions and the bottom surface of the mounting notch. Two connectors are connected to the upper and lower sides of the PCB board via pins. The PCB board is fixed inside the base, and the four connectors are correspondingly snapped into the aerospace connector interfaces. Mounting ears are provided at the four corners of the base, and each mounting ear has a mounting hole.
[0007] Using the above technical solution, the reaction flywheel circuit box is fixed to the spacecraft through the mounting holes on the mounting ears, and the spacecraft busbar is connected to the flywheel through the front and rear sets of connectors.
[0008] Furthermore, seven bosses are vertically connected to the bottom surface inside the base. The seven bosses are located at the four corners, the middle, and both sides of the middle of the bottom surface. Screw holes are provided on the top of the bosses, and connecting holes that mate with the bosses are provided on the PCB board. The PCB board is placed on the bosses and fixed with screws.
[0009] Furthermore, an arc-shaped notch is provided in the middle of one side of the PCB board, and an arc-shaped protrusion is provided on one side of the inside of the base to mate with the arc-shaped notch; when the PCB board is installed inside the base, the arc-shaped protrusion is engaged in the arc-shaped notch. This design of the arc-shaped protrusion and the arc-shaped notch helps prevent directional errors during soldering and assembly.
[0010] Furthermore, through holes are provided at the four corners and both sides of the center of the cover plate, and fixing holes that mate with the through holes are provided at the upper edge of the base. The cover plate is connected to the base by countersunk screws.
[0011] Furthermore, threaded holes are provided on the left and right sides of the aerospace component connector interface, and bolts on both sides of the connector are connected to the threaded holes.
[0012] The reaction flywheel circuit box provided by this utility model is fixed to the spacecraft through the mounting holes on the mounting ears, and the spacecraft busbar is connected to the flywheel through two sets of connectors at the front and rear. Compared with the internal current protection circuit of the flywheel, this circuit box is placed externally and independently. The separate design of the base and cover plate facilitates the assembly, soldering and testing of the PCB board and connectors. The external protection of the circuit box, together with the internal circuit protection of the flywheel, meets the design redundancy of the aerospace field. The combination of arc-shaped protrusions and arc-shaped notches prevents directional errors during soldering and assembly. Attached Figure Description
[0013] Figure 1 A schematic diagram of the reaction flywheel circuit box provided in an embodiment of this utility model.
[0014] Figure 2 for Figure 1 A schematic diagram of the structure of the base and cover plate of the reaction flywheel circuit box.
[0015] Figure 3 for Figure 1 A top view of the PCB board of the reaction flywheel circuit box.
[0016] Figure 4 for Figure 1 A schematic diagram of the PCB board structure of the reaction flywheel circuit box.
[0017] Figure 5 for Figure 1A schematic diagram of the base of the reaction flywheel circuit box.
[0018] Figure 6 for Figure 1 A schematic diagram of the cover plate of the reaction flywheel circuit box.
[0019] The reference numerals and components involved in the accompanying drawings are shown below:
[0020] 1. Base; 11. Mounting notch; 12. Mounting ear
[0021] 13. Mounting hole; 14. Boss; 15. Screw hole
[0022] 16. Arc-shaped protrusion; 17. Threaded hole; 2. Cover plate
[0023] 21. Protrusion; 22. Through hole; 23. Fixing hole
[0024] 3. PCB board 31, connecting hole 32, arc-shaped notch
[0025] 4. Connectors; 5. Aerospace component connector interfaces Detailed Implementation
[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0027] The terms "first," "second," "third," "fourth," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0028] Example 1
[0029] Figure 1 This is a schematic diagram of the structure of the reaction flywheel circuit box provided in an embodiment of the present utility model. Figure 2 for Figure 1 A schematic diagram of the structure of the base and cover plate of the reaction flywheel circuit box. Figure 3 for Figure 1 A top view of the PCB board of the reaction flywheel circuit box. Figure 4 for Figure 1 A schematic diagram of the PCB board structure of the reaction flywheel circuit box. Figure 5 for Figure 1 A schematic diagram of the base of the reaction flywheel circuit box. Figure 6 for Figure 1 A schematic diagram of the cover plate of the reaction flywheel circuit box. Please refer to... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 The reaction flywheel circuit box provided in this embodiment includes a base 1, a cover plate 2, a PCB board 3, and connectors 4. The base 1 is a rectangular parallelepiped with a hollow interior and an open top. Two mounting notches 11 are provided on the front and rear of the base 1, and the mounting notches 11 on the front and rear of the base 1 are symmetrically arranged. The cover plate 2 is rectangular, and two protrusions 21 are vertically connected to the front and rear sides of the cover plate 2. The cover plate 2 covers the upper opening of the base 1, and the four protrusions 21 are inserted into the mounting notches 11. An aerospace component connector interface 5 is formed between the lower end of the protrusions 21 and the bottom surface of the mounting notch 11. Two connectors 4 are connected to the upper and lower sides of the PCB board 3 through pins. The PCB board 3 is fixed inside the base 1, and the four connectors 4 are correspondingly snapped into the aerospace component connector interfaces 5. Mounting ears 12 are provided at the four corners under the base 1, and mounting ears 12 are provided with mounting holes 13.
[0030] It should be noted that, when using the reaction flywheel circuit box of this utility model, the reaction flywheel circuit box is fixed to the spacecraft through the mounting holes 13 on the mounting ears 12, and the spacecraft busbar is connected to the flywheel through the two sets of connectors 4 at the front and rear. Compared with the internal current protection circuit of the flywheel, the reaction flywheel circuit box of this utility model is placed externally and independently. The base 1 and the cover plate 2 are designed to be separate and cooperate, which facilitates the assembly, soldering and testing of the PCB board 3 and the connectors 4. The external protection of the circuit box, together with the internal circuit protection of the flywheel, meets the design redundancy of the aerospace field.
[0031] Further reference Figure 4 , Figure 5 , Figure 6 The present invention has seven protrusions 14 vertically connected to the bottom surface inside the base 1. The seven protrusions 14 are respectively located at the four corners, the middle and both sides of the middle of the bottom surface. Screw holes 15 are provided on the top of the protrusions 14. Connection holes 31 that cooperate with the protrusions 14 are provided on the PCB board 3. The PCB board 3 is placed on the protrusions 14 and fixed by screws.
[0032] Further reference Figure 3 The present invention provides an arc-shaped notch 32 in the middle of one side of the PCB board 3, and an arc-shaped protrusion 16 that cooperates with the arc-shaped notch 32 is provided on one side inside the base 1; when the PCB board 3 is installed inside the base 1, the arc-shaped protrusion 16 is locked in the arc-shaped notch 32.
[0033] It should be noted that the design of the arc-shaped convex and arc-shaped notch 32 is designed to prevent incorrect orientation during welding and assembly.
[0034] Further reference Figure 5 , Figure 6 The present invention provides through holes 22 at the four corners and both sides of the middle of the cover plate 2, and provides fixing holes 23 at the upper edge of the base 1 that cooperate with the through holes 22. The cover plate 2 is connected to the base 1 by countersunk screws.
[0035] Furthermore, the present invention provides threaded holes 17 on the left and right sides of the aerospace component connector interface 5, and the bolts on both sides of the connector 4 are connected to the threaded holes 17.
[0036] As can be seen from the above description, the advantages of this utility model are:
[0037] This utility model discloses a reaction flywheel circuit box. During use, the reaction flywheel circuit box is fixed to the spacecraft via mounting holes on the mounting ears. The spacecraft busbar is connected to the flywheel via two sets of connectors. Compared to the internal current protection circuit of the flywheel, this circuit box is externally independent. The separate design of the base and cover facilitates the assembly, soldering, and testing of the PCB board and connectors. The external protection of the circuit box, combined with the internal circuit protection of the flywheel, meets the design redundancy requirements of the aerospace field. The combined design of the arc-shaped protrusion and arc-shaped notch prevents directional errors during soldering and assembly.
[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A reaction flywheel circuit box, characterized in that, Includes a base (1), a cover plate (2), a PCB board (3), and a connector (4); The base (1) is a cuboid with a hollow interior and an open top. There are two mounting notches (11) on the front and back of the base (1). The mounting notches (11) on the front and back of the base (1) are symmetrically arranged. The cover plate (2) is rectangular. Two protrusions (21) are vertically connected to the front and rear sides of the cover plate (2). The cover plate (2) covers the upper opening of the base (1). The four protrusions (21) are inserted into the mounting notch (11). An aerospace connector interface (5) is formed between the lower end of the protrusion (21) and the bottom surface of the mounting notch (11). The PCB board (3) has two connectors (4) connected to its upper and lower sides by pins. The PCB board (3) is fixed inside the base (1). The four connectors (4) are correspondingly snapped into the aerospace component connector interface (5). Mounting ears (12) are provided at the four corners below the base (1), and mounting holes (13) are provided on the mounting ears (12).
2. The reaction flywheel circuit box according to claim 1, characterized in that, Seven bosses (14) are vertically connected to the bottom surface inside the base (1). The seven bosses (14) are located at the four corners, the middle and both sides of the middle of the bottom surface. Screw holes (15) are provided on the top of the bosses (14). Connection holes (31) that cooperate with the bosses (14) are provided on the PCB board (3). The PCB board (3) is placed on the bosses (14) and fixed by screws.
3. The reaction flywheel circuit box according to claim 2, characterized in that, An arc-shaped notch (32) is provided in the middle of one side of the PCB board (3), and an arc-shaped protrusion (16) that cooperates with the arc-shaped notch (32) is provided on one side inside the base (1); when the PCB board (3) is installed inside the base (1), the arc-shaped protrusion (16) is stuck in the arc-shaped notch (32).
4. The reaction flywheel circuit box according to claim 2, characterized in that, Through holes (22) are provided at the four corners and both sides of the middle of the cover plate (2). Fixing holes (23) that cooperate with the through holes (22) are provided at the upper edge of the base (1). The cover plate (2) is connected to the base (1) by countersunk screws.
5. The reaction flywheel circuit box according to claim 1, characterized in that, Threaded holes (17) are provided on the left and right sides of the aerospace component connector interface (5), and bolts on both sides of the connector (4) are connected to the threaded holes (17).