Device for assisting movement of satellite solar panel

Abstract

The utility model provides a satellite solar panel movement assisting device which comprises a center shaft, a first hinge unit, a second hinge unit and a fixing part, the first hinge unit and the second hinge unit are rotationally connected through the center shaft, and the fixing part is connected with the first hinge unit to fix an included angle between the first hinge unit and the second hinge unit. And the fixing part is also connected with the central shaft. The coaxial hinge has the advantages that the first hinge unit, the second hinge unit and the fixing part are arranged to be of a coaxial structure, the occupied space of the structure can be better reduced, the structure is compact, installation is convenient, the weight is light, the machining cost is low, and the reliability of the structure can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of space technology, especially relates to a kind of auxiliary satellite solar sail movement device. BACKGROUND

[0002] In the prior art, the solar sail is the only power generation unit of the space satellite, which converts the received solar energy into electrical energy to continuously power the satellite. The space satellite is limited by the fairing envelope space in the launch vehicle. During the launch phase, the solar sail needs to be folded on one side of the satellite body. After the satellite and rocket are separated, the satellite solar sail is unfolded into a straight plane according to the ground control command. During the satellite launch and on-orbit flight phase, whether the solar sail can be normally unfolded is related to whether the satellite can work normally. If the sail cannot be normally unfolded, the whole satellite will gradually lose its running ability due to the decrease of power supply, which affects the service life of the satellite. Therefore, the device for adjusting the movement of the solar sail to unfold is a key component to ensure the normal operation of the satellite.

[0003] Compared with microsatellites, the device with a spring is usually used to assist the locking or release of the solar sail. When the sail is folded, a certain potential energy is stored. When the sail is unlocked, the spring releases the potential energy to drive the sail to move and unfold. However, the driving force is not easy to control, and there is a risk of collision between the sails during the unfolding process. Although the existing part of the auxiliary satellite sail movement device can reduce the above-mentioned risks through structural design, its structure product envelope is large, the design is complex, the weight is heavy, and the cost is high, which is difficult to meet the market application requirements of miniaturization, light weight and low cost of current microsatellites.

[0004] There are technical problems of large structure product envelope, heavy weight and high cost in the auxiliary satellite solar sail movement device. INVENTION CONTENTS

[0005] To solve the above technical problems, the utility model provides an auxiliary satellite solar sail movement device, which is especially suitable for ensuring application stability and solving the problems of large volume envelope, heavy weight and high cost.

[0006] The technical scheme adopted by the utility model is: an auxiliary satellite solar sail movement device, comprising a central shaft, a first hinge unit, a second hinge unit and a fixed component, the first hinge unit and the second hinge unit are rotatably connected through the central shaft, and the fixed component is connected with the first hinge unit to fix the included angle between the first hinge unit and the second hinge unit.

[0007] Further, it further includes a driving spring, and the driving spring is sleeved on the central shaft to adjust the included angle between the first hinge unit and the second hinge unit through elastic potential energy.

[0008] Further, the first hinge unit and the second hinge unit are provided with fixing grooves, and the two ends of the driving spring are respectively embedded in the corresponding fixing grooves.

[0009] Further, the first hinge unit comprises a first hinge part and at least one first connecting piece connected with the first hinge part, and the second hinge unit comprises a second hinge part and at least one second connecting piece connected with the second hinge part, and the first connecting piece and the second connecting piece are rotationally connected through the central shaft.

[0010] Further, the fixing part is also connected with the central shaft, and the fixing part comprises a fixing pin connecting piece and a fixing pin movably connected with the fixing pin connecting piece, the fixing pin connecting piece is connected with the central shaft, and the fixing pin is movably connected with the corresponding first connecting piece and slidably connected with at least one second connecting piece.

[0011] Further, the fixing part further comprises an adjusting spring, the fixing pin is movably connected with the fixing pin connecting piece through the adjusting spring, and when the included angle between the first hinge part and the second hinge part meets the preset angle, the adjusting spring can drive the fixing pin to be clamped with the corresponding second connecting piece.

[0012] Further, the fixing pin is sequentially inserted into the fixing pin connecting piece and the corresponding first connecting piece, and the fixing pin and the fixing pin connecting piece form a movable cavity to arrange the adjusting spring.

[0013] Further, the fixing part further comprises a limiting assembly, and the fixing pin connecting piece is sleeved on the central shaft and limited by the limiting assembly.

[0014] Further, the number of the fixing parts is two, and the fixing parts are arranged on two sides of the first hinge unit respectively.

[0015] The sailboard has the advantages and positive effects that: due to the above technical scheme, the stability of the sailboard can be improved, the sailboard has the advantages of compact structure, reduced occupied space resource, simple structure, convenient installation, light weight, low processing cost and the like. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a front structure schematic view of an embodiment of the utility model after unfolding 180°;

[0017] Figure 2 is a back structure schematic view of an embodiment of the utility model after unfolding 180°;

[0018] Figure 3 is a structure schematic view of a first hinge unit in an embodiment of the utility model;

[0019] Figure 4 is a structure schematic view of a second hinge unit in an embodiment of the utility model;

[0020] Figure 5 is a structural schematic view of the center shaft in an embodiment of the utility model;

[0021] Figure 6 is a structural schematic view of the fixed component in an embodiment of the utility model;

[0022] Figure 7 is a longitudinal section structural schematic view of the fixed component in an embodiment of the utility model;

[0023] In the drawing:

[0024] 1, center shaft 2, first hinge unit 3, second hinge unit

[0025] 4, drive spring 6, limiting assembly 7, shaft sleeve

[0026] 8, embedded groove 21, first hinge part 22, first connecting piece

[0027] 31, second hinge part 32, second connecting piece 41, connecting end

[0028] 51, fixed pin connecting piece 52, fixed pin 53, adjusting spring

[0029] 221, mounting hole 222, first connecting hole 321, limiting hole

[0030] 322, second connecting hole DETAILED DESCRIPTION

[0031] The embodiments of the utility model will be described below in conjunction with the drawings, and the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.

[0032] The embodiments of the utility model will be described below in conjunction with the drawings, and the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.

[0033] In the description of the utility model, it is understood that the terms such as "mounting", "connecting", "fixing" should be understood in a broad sense, which can be direct connection, mounting or fixing, or indirect connection, mounting or fixing, and the utility model does not limit this.

[0034] In the description of the utility model, need understanding is, the term "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" "internal", "external", "axial", "radial", "circumferential" such as the orientation or positional relationship indicated by the drawing is based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the structure or unit referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore can not be understood as a limitation on the utility model.

[0035] As Figures 1 to 7 The utility model discloses an embodiment of a kind of auxiliary satellite solar panel movement device, as shown in a schematic diagram, including center shaft 1, first hinge unit 2, second hinge unit 3 and fixed component, first hinge unit 2, second hinge unit 3 are rotationally connected by center shaft 1, and fixed component is connected with first hinge unit 2 to fix the included angle between first hinge unit 2 and second hinge unit 3.

[0036] In the embodiment, it also includes drive spring 4, drive spring 4 is sleeved on center shaft 1 to adjust the included angle between first hinge unit 2 and second hinge unit 3 by elastic potential energy. In the embodiment, it also includes shaft sleeve 7, shaft sleeve 7 is arranged between center shaft 1 and drive spring 4, can reduce the rigid contact of drive spring 4 and center shaft 1, reduce wear, improve service life. Shaft sleeve 7 can adopt polyimide material, and drive spring 4 adopts spring steel material.

[0037] In the embodiment, first hinge unit 2 and second hinge unit 3 are both provided with fixed grooves, and the two ends of drive spring 4, i.e. two connecting ends 41 of drive spring 4, are respectively embedded in the corresponding fixed grooves for fixation. By limiting and installing drive spring 4 through the fixed grooves, the instability of drive spring 4 is better prevented, the driving force is better controlled, the collision between the panels during operation is reduced, and the use stability is improved.

[0038] In the embodiment, the first hinge unit 2 and the second hinge unit 3 are provided with the embedded groove 8, and the driving spring 4 can be embedded in the embedded groove 8. In the embodiment, the driving spring 4 is one and is sleeved in the middle part of the central shaft 1, the first hinge unit 2 and the second hinge unit 3 are both provided in a U shape and form the embedded groove 8 through the opening, and the first hinge unit 2, the second hinge unit 3 and the driving spring 4 form a coaxial structure through the central shaft 1. The driving spring 4 can not only drive the relative rotation of the first hinge unit 2 and the second hinge unit 3, but also can be embedded in the embedded groove 8 in the process of folding to unfolding, so as to ensure compact structure and reduce occupied space resources. In other embodiments, the number of the driving spring 4 can be adjusted according to the use requirement, the number and position of the embedded groove 8 are matched with the driving spring 4, and only the relative rotation of the first hinge unit 2 and the second hinge unit 3 driven by the driving spring 4 and the compact structure can be ensured.

[0039] The embodiment does not need to occupy extra space, the quality and number of the connecting pieces are less, the processing cost is low, and the overall weight can be reduced, so that the structure can be simplified and the reliability of the whole can be ensured.

[0040] In the embodiment, the first hinge unit 2 includes the first hinge part 21 and at least one first connecting piece 22 connected with the first hinge part 21, the second hinge unit 3 includes the second hinge part 31 and at least one second connecting piece 32 connected with the second hinge part 31, and the first connecting piece 22 and the second connecting piece 32 are rotationally connected through the central shaft 1. In the embodiment, each of the first connecting piece 22 and the second connecting piece 32 is provided with a recess to splice and limit the corresponding second hinge part 31 or first hinge part 21, so as to ensure the fixing stability and compact structure after unfolding to a preset angle. In the embodiment, the number of the first connecting piece 22 and the second connecting piece 32 is both two, and both are sleeved outside the central shaft 1, the two second connecting pieces 32 are arranged on the two sides of the driving spring 4, the first connecting piece 22 is arranged on the side of the second connecting piece 32 away from the driving spring 4 and abuts against the second connecting piece 32 to reduce the occupied space.

[0041] In the embodiment, the fixing component is also connected with the central shaft 1, each fixing component includes a fixed pin connecting piece 51 and a fixed pin 52 movably connected with the fixed pin connecting piece 51, each fixed pin connecting piece 51 is connected with the central shaft 1, and the fixed pin 52 is movably connected with the corresponding first connecting piece 22 and slidably connected with at least one second connecting piece 32. In the embodiment, the first connecting piece 22, the second connecting piece 32 and the fixed pin connecting piece 51 can be arranged axially and spaced apart along the central shaft 1, and the fixed pin connecting piece 51 does not need to be nested in the structure of the first hinge unit 2 or the second hinge unit 3, so as to increase the design window of the first hinge unit 2 and the second hinge unit 3 and better reduce the volume of the device. In the embodiment, the first hinge part 21 and the second hinge part 31 are both in a sheet-shaped thin structure, so that the distance between the satellite and the solar panel is smaller, and the space envelope of the whole satellite is reduced.

[0042] In the embodiment, the fixing component further comprises an adjusting spring 53, and the fixing pin 52 is movably connected with the fixing pin connector 51 through the adjusting spring 53. When the included angle between the first hinge part 21 and the second hinge part 31 meets the preset angle, the adjusting spring 53 can drive the fixing pin 52 to be clamped with the corresponding second connector 32 to be fixed. In the embodiment, the second connector 32 is provided with a limiting hole 321 to clamp the fixing pin 52; in other embodiments, the second connector 32 can also be provided with a clamping groove to clamp the fixing pin 52. In the embodiment, the unfolding angle is 180°, and in different embodiments, the position of the limiting hole 321 or the clamping groove can be adjusted according to the requirement of the unfolding angle to meet the requirement of different unfolding angles.

[0043] In the embodiment, the fixing pin 52 is sequentially inserted into the fixing pin connector 51 and the corresponding first connector 22, and an active cavity is formed between the fixing pin 52 and the fixing pin connector 51 to arrange the adjusting spring 53. The adjusting spring 53 is embedded in the fixing pin connector 51 and connected with the fixing pin connector 51 and the fixing pin 52 respectively. In the embodiment, the first connector 22 for mounting the fixing pin 52 is provided with a mounting hole 221, and the fixing pin 52 is inserted into the corresponding mounting hole 221.

[0044] The number of fixing components is matched with the number of mounting holes 221, and in different embodiments, the number of fixing components can be designed to be one or more according to the requirement. In the embodiment, the number of fixing components is two and is arranged on both sides of the first hinge unit. The fixing components arranged on both ends not only facilitate installation, but also can improve the alignment accuracy after the device is unfolded, simplify the structure, and realize two-stage limiting at the same time, adopt redundant backup design, and ensure reliability.

[0045] In the embodiment, each fixing component further comprises a limiting assembly 6, and each fixing pin connector 51 is sleeved on the central shaft 1 and limited by the limiting assembly 6. The limiting assembly 6 comprises a nut made of titanium alloy, and the end of the central shaft 1 can be provided with a thread and screwed with the nut; the limiting assembly 6 further comprises a gasket, which can also be made of titanium alloy, and is arranged between the central shaft 1 and the nut and has an area larger than that of the nut, so as to increase the stress area and ensure the fastening stability. The limiting assembly 6 is arranged on the side of the fixing pin connector 51 away from the first connector 22 and connected with the central shaft 1, and can prevent the first hinge unit 2, the second hinge unit 3 or the fixing pin connector 51 from sliding along the central shaft 1.

[0046] In the process of unfolding the sailboard, the first hinge unit 2, the second hinge unit 3 and the fixing pin 52 rotate relatively, and the contact surface between each two is an active contact surface, which is prone to cold welding effect in a vacuum cryogenic environment. In order to prevent the cold welding effect, a layer of molybdenum disulfide can be coated on the surface of each two relatively contacting surfaces to increase the lubricating effect between the structures and avoid the phenomenon that the unfolding device is stuck.

[0047] The first hinge unit 2 is a fixed hinge, which is made of aluminum alloy, and the first hinge part 21 is provided with a plurality of assembly holes for connecting with the satellite body. The second hinge unit 3 is a movable hinge, which is also made of aluminum alloy, and the second hinge part 31 is also provided with a plurality of assembly holes for connecting with the solar sail. The central shaft 1 is made of titanium alloy, which is arranged in the first connecting hole 222 of the first connecting piece 22 and the second connecting hole 322 of the second connecting piece 32, so that the first hinge unit 2 and the second hinge unit 3 are coaxial. In this embodiment, the fixed part can be fastened to the side of the first hinge unit 2 by the nut of the limiting assembly 6. When the second hinge unit 3 rotates relative to the first hinge unit 2, the fixed pin 52 slides on the side of the second hinge unit 3 until it is aligned with the limiting hole 321, and then it is inserted into the limiting hole 321 for fixation. In different embodiments, the first hinge unit 2 can also be a movable hinge, and the second hinge unit can be a fixed hinge. By adjusting the fastening degree of the nut in the limiting assembly 6, the fixed part is connected with the central shaft 1 in a clearance fit. The fixed pin 52 is inserted into the first hinge unit 2 and rotates with it. The fixed pin 52 slides along the side of the second hinge unit 3 until it is inserted into the limiting hole 321 for fixation.

[0048] The specific working process of this embodiment is as follows:

[0049] During the unfolding movement of the solar sail, the first hinge unit 2 and the second hinge unit 3 rotate relative to each other. The fixed pin 52 slides along the rotating direction and the side of the second connecting piece 32 corresponding to the second hinge unit 3 until the fixed pin 52 is aligned with the corresponding limiting hole 321. At this time, under the drive of the adjusting spring 53, the fixed pin 52 extends into the limiting hole 321. The first hinge unit 2 and the second hinge unit 3 stop rotating relative to each other. The device is unfolded and locked in position. If the device needs to be unlocked, the fixed pin 52 can be pulled out slightly to separate from the limiting hole 321.

[0050] This embodiment can reduce the distance between the first hinge unit 2 and the second hinge unit 3 through coaxial design. The fixed part is sleeved on the central shaft and arranged on the side of the first hinge unit 2. Therefore, the first hinge part 21 and the second hinge part 31 can be designed as a sheet-shaped thin structure, so that the distance between the satellite and the solar sail is smaller, the structure is simple, the number of parts is less, and the weight and envelope volume are effectively controlled. Through rational layout, the thickness after folding can be reduced to 10 mm, the occupation of the whole satellite resources is reduced, and the device has great advantages in space satellite applications. The driving spring 4 is sleeved outside the central shaft 1, and the connecting end 41 is embedded in the first hinge part 21 or the second hinge part 31, which does not occupy space resources and can stably control the driving force. The number and quality of the structural connecting pieces are low, which can reduce the weight and processing cost. Molybdenum disulfide is sprayed to effectively prevent vacuum cold welding. The fixed parts arranged at both ends not only facilitate installation but also can ensure the fixing accuracy and stability.

[0051] The embodiments of the present application are described in detail above, but the content is only the preferred embodiments of the present application, and cannot be considered to limit the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still belong to the patent coverage of the present application.

Claims

1. An apparatus for assisting in the movement of a satellite solar array, comprising: The utility model relates to a kind of solar panel locking device, including: Center shaft, first hinge unit, second hinge unit and fixed component, the first hinge unit, the second hinge unit are connected by the center shaft rotation, the fixed component is connected with the first hinge unit to fix the included angle between the first hinge unit and the second hinge unit; Further including drive spring, the drive spring is sleeved on the center shaft to adjust the included angle between the first hinge unit, the second hinge unit by elastic potential energy; The first hinge unit, the second hinge unit are all set with fixed slot, and the two ends of the drive spring for connection are respectively embedded in corresponding fixed slot; The first hinge unit, the second hinge unit are all set to U type and form embedded slot by opening, and from folding to unfolding, the drive spring can be embedded in the embedded slot; The first hinge unit includes first hinge part and at least one first connecting piece connected with the first hinge part, and the second hinge unit includes second hinge part and at least one second connecting piece connected with the second hinge part, and the first connecting piece, the second connecting piece are connected by the center shaft rotation; The fixed component includes fixed pin connecting piece, fixed pin, adjusting spring and limiting assembly, the fixed pin connecting piece is sleeved on the center shaft and is limited by the limiting assembly, the fixed pin is movably connected with the fixed pin connecting piece by the adjusting spring, the fixed pin and the fixed pin connecting piece form movable cavity to set the adjusting spring, the first connecting piece is set with mounting hole, and the fixed pin is sequentially inserted into the fixed pin connecting piece, corresponding the first connecting piece; The second connecting piece is set with limiting hole, and in the process of solar panel unfolding movement, the fixed pin slides along the side of the second connecting piece, until the fixed pin is aligned with corresponding limiting hole, under the drive of the adjusting spring, the fixed pin is inserted into the limiting hole, and the device is unfolded in place and realizes limiting locking;When the device needs to be unlocked, the fixed pin is pulled outwards to be separated from the limiting hole.

2. The satellite solar array motion assist device of claim 1, wherein: The number of the fixed component is two and is respectively arranged on both sides of the first hinge unit.

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