A zero-gravity unloading system that is vertically flipped and deployed

Abstract

The application provides a zero-gravity unloading system which is vertically flipped and unfolded, a linear motion mechanism is fixedly installed on a support structure, a hanging assembly is fixedly installed at the lower end of the linear motion mechanism, the lower end of the hanging assembly is fixedly connected to an unloading object, one sliding assembly is arranged on each side of a connecting plate, the periphery of each sliding assembly is fixedly connected to the upper end of the support structure, two pulley hanging assemblies are arranged at the lower end of the connecting plate, the two pulley hanging assemblies are arranged in parallel with each other, one end of each pulley hanging assembly is fixedly connected to the unloading object, one end of a lead screw assembly is fixedly connected to a speed reducer, the periphery of the speed reducer is fixedly connected to the upper end of the support structure, and one end of the lead screw assembly is fixedly connected to the middle part of the lower end of the connecting plate. The zero-gravity unloading system which is vertically flipped and unfolded is especially suitable for zero-gravity vertical flipping and unfolding test of large and heavy products, so that the reliability of the to-be-tested products can be improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of micro-low gravity, and particularly relates to a zero-gravity unloading system of vertical overturning and unfolding. BACKGROUND

[0002] When a spaceflight component is subjected to zero-gravity unloading test, currently, the zero-gravity unfolding test device is mainly of horizontal two-dimensional motion trajectory unfolding. Since the realization method is various, the structure is simple, the reliability is high, and the technology is relatively mature. However, the constant force system capable of realizing longitudinal motion is difficult to realize large load gravity unloading, and the engineering practicability is low. SUMMARY

[0003] Therefore, the application aims to provide a zero-gravity unloading system of vertical overturning and unfolding to solve the problem that the constant force system capable of realizing longitudinal motion is difficult to realize large load gravity unloading, and the engineering practicability is low.

[0004] To achieve the above-mentioned purpose, the technical scheme of the application is as follows:

[0005] The zero-gravity unloading system of vertical overturning and unfolding comprises a support structure, a linear motion mechanism and a pulley hanging assembly. The linear motion mechanism is fixedly installed on the support structure, and the hanging assembly is fixedly installed at the lower end of the linear motion mechanism. The lower end of the hanging assembly is fixedly connected to an unloading object. The linear motion mechanism comprises a speed reducer, a connecting plate, a lead screw assembly and a sliding assembly. One sliding assembly is arranged on each side of the connecting plate, and the outer periphery of each sliding assembly is fixedly connected to the upper end of the support structure. Two pulley hanging assemblies are arranged at the lower end of the connecting plate, and the two pulley hanging assemblies are arranged in parallel with each other. One end of each pulley hanging assembly is fixedly connected to the unloading object. One end of the lead screw assembly is fixedly connected to the speed reducer, and the outer periphery of the speed reducer is fixedly connected to the upper end of the support structure. One end of the lead screw assembly is fixedly connected to the middle part of the lower end of the connecting plate.

[0006] Further, the lead screw assembly comprises a lead screw and a nut. One end of the lead screw is fixedly connected to one end of the speed reducer, and the outer periphery of the lead screw is threadedly connected to the inner ring of the nut. The outer periphery of the nut is fixedly connected to the middle part of the lower end of the connecting plate.

[0007] Further, the sliding assembly comprises a sliding rail and a sliding block. The outer periphery of the sliding rail is fixedly connected to the upper end of the support structure, and the outer periphery of the sliding rail is slidingly connected to one end of the sliding block. The other end of the sliding block is fixedly connected to the upper end of the connecting plate.

[0008] Further, the sliding rail is a linear guide rail or an air floating guide rail.

[0009] Further, the pulley hanging assembly comprises a first fixed pulley, a second fixed pulley, a rope and a counterweight, the first fixed pulley and the second fixed pulley are arranged in parallel with each other, the upper end of the first fixed pulley is fixedly connected to the lower end of the connecting plate, the upper end of the second fixed pulley is fixedly connected to the upper end of the support structure, one end of the rope is fixedly connected to the unloading object, and the other end of the rope is fixedly connected to the periphery of the counterweight in sequence along the periphery of the first fixed pulley and the periphery of the second fixed pulley.

[0010] Further, the periphery of the counterweight is detachably installed with a compensation counterweight.

[0011] Further, the support structure is a steel structure truss or a ball head ball rod truss.

[0012] Further, the rope is a steel wire rope or an aramid rope.

[0013] Further, the unloading object comprises a body, a rotating shaft and a mounting seat, the rotating shaft is arranged on one side of the body and rotatably sleeved to the mounting seat, the mounting seat is fixedly installed at a preset position, a power motor is installed on the mounting seat, a transmission shaft of the power motor is fixedly connected to one end of the rotating shaft, and one lifting point is arranged on each side of the body, and one end of each rope is fixedly connected to the lifting point.

[0014] Further, the first fixed pulley and the second fixed pulley are both air floating pulleys.

[0015] Compared with the prior art, the vertical overturning and unfolding zero-gravity unloading system has the following beneficial effects:

[0016] (1) The vertical overturning and unfolding zero-gravity unloading system is especially suitable for zero-gravity vertical overturning and unfolding test of large and heavy products, and is convenient for the staff to evaluate the reliability of the products to be tested.

[0017] (2) The vertical overturning and unfolding zero-gravity unloading system is provided to prevent the pulley from being interfered by friction during rotation, the first fixed pulley and the second fixed pulley are both air floating pulleys, and the pulley and the guide rail are also air floating, so as to reduce the influence of system friction on the overturning and unfolding of the unloading object and improve the test precision. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present application, and the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 A simple schematic diagram of the vertical overturning and unfolding zero-gravity unloading system is shown in the drawings.

[0020] Figure 2A structural schematic view of a vertical overturning and unfolding zero-gravity unloading system according to an embodiment of the present application;

[0021] Figure 3 A top view schematic view of a vertical overturning and unfolding zero-gravity unloading system according to an embodiment of the present application;

[0022] Figure 4 A structural schematic view of a linear motion mechanism according to an embodiment of the present application.

[0023] Legend of reference signs:

[0024] 1 - support mechanism; 2 - linear motion mechanism; 21 - speed reducer motor; 22 - connecting plate; 23 - screw rod assembly; 24 - sliding assembly; 241 - sliding rail; 242 - sliding block; 3 - hanging assembly; 31 - first fixed pulley; 32 - second fixed pulley; 33 - rope; 34 - counterweight; 35 - compensation counterweight; 4 - unloading object; 5 - rotating shaft; 6 - mounting seat; 7 - hanging point. DETAILED DESCRIPTION

[0025] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0027] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] like Figures 1-4 As shown, a vertically flipping and unfolding zero-gravity unloading system includes a support structure, linear motion mechanisms 2, and pulley suspension assemblies 3. The support structure 1 is placed on or fixed to the ground. The support structure is a steel truss or a ball-head truss. Two linear motion mechanisms 2 are fixedly installed on the support structure. The two linear motion mechanisms 2 are arranged parallel to each other, and a pulley suspension assembly 3 is fixedly installed at the lower end of each linear motion mechanism 2. The lower end of each pulley suspension assembly 3 is fixedly connected to a lifting point 7 of the unloading object 4. The two linear mechanisms can move independently. The linear motion mechanism 2 includes a reduction motor 2. 1. Connecting plate 22, lead screw assembly 23 and sliding assembly 24. A sliding assembly 24 is provided on each side of the connecting plate 22, and the periphery of each sliding assembly 24 is fixedly connected to the upper end of the support structure. Two pulley hanging assemblies 3 are provided at the lower end of the connecting plate 22, and the two pulley hanging assemblies 3 are arranged parallel to each other. One end of each pulley hanging assembly 3 is fixedly connected to the unloading object 4. One end of the lead screw assembly is fixedly connected to the reduction motor 21, and the periphery of the reduction motor 21 is fixedly connected to the upper end of the support structure. One end of the lead screw assembly 23 is fixedly connected to the middle of the lower end of the connecting plate 22.

[0030] The lead screw assembly 23 includes a lead screw and a nut. One end of the lead screw is fixedly connected to one end of the geared motor 21. The outer thread of the lead screw is connected to the inner ring of the nut. The outer thread of the nut is fixedly connected to the lower middle part of the connecting plate 22. The sliding assembly 24 includes a slide rail 241 and a slider 242. The outer thread of the slide rail 241 is fixedly connected to the upper end of the support structure. The outer thread of the slide rail 241 is slidably connected to one end of the slider 242. The other end of the slider 242 is fixedly connected to the upper end of the connecting plate 22. The slide rail 241 is a linear guide or air-bearing guide of the prior art. The connecting plate 22 is installed on the slider 242 of the two guide rails and fixed to the lead screw nut. The guide rail, lead screw, and geared motor 21 are fixed on the support structure. When the geared motor 21 drives the lead screw to rotate, it can drive the connecting plate 22 to slide on the guide rail.

[0031] The pulley hanging assembly 3 comprises a first fixed pulley 31, a second fixed pulley 32, a rope 33 and a counterweight 34, the first fixed pulley 31 and the second fixed pulley 32 are arranged in parallel with each other, the upper end of the first fixed pulley 31 is fixedly connected to the lower end of the connecting plate 22, the upper end of the second fixed pulley 32 is fixedly connected to the upper end of the support structure, one end of the rope 33 is fixedly connected to the unloading object 4, the other end of the rope 33 is fixedly connected to the periphery of the counterweight 34 in sequence along the periphery of the first fixed pulley 31 and the periphery of the second fixed pulley 32, the first fixed pulley 31 is installed on the connecting plate 22 and can move with the connecting plate 22 on the guide rail; the second fixed pulley 32 is fixed on the support structure, the rope 33 passes through the first fixed pulley 31 and the second fixed pulley 32 and is connected with the counterweight 34, the counterweight 34 and the compensation counterweight 35 can be composed of a plurality of small counterweights, the weight can be adjusted, the compensation counterweight 35 is hung on the counterweight 34 when the system needs gravity compensation, and is used for compensating unloading errors in the unfolding process, the rope 33 can be a steel wire rope or an aramid rope, and two ropes 33 are used for being connected with two lifting points 7 of the unloading object 4, in order to reduce the friction force of hanging and improve unloading accuracy, the first fixed pulley 31 and the second fixed pulley 32 can be replaced by air floating pulleys.

[0032] As shown in the figure, Figure 2 The unloading object 4 comprises a body, a rotating shaft 5 and a mounting seat 6, the rotating shaft 5 is arranged on one side of the body and is rotatably sleeved to the mounting seat 6, the mounting seat 6 is fixedly installed at a predetermined position, a power motor is installed on the mounting seat 6, a transmission shaft of the power motor is fixedly connected to one end of the rotating shaft 5, and one lifting point 7 is arranged on each side of the body, and one end of each rope 33 is fixedly connected to the lifting point 7.

[0033] The working process of the zero-gravity unloading system of vertical flip unfolding:

[0034] When the unloading object 4 is vertically flipped and unfolded in zero gravity, the rotating shaft 5 rotates clockwise, and when it is folded, the rotating shaft 5 rotates counterclockwise, in the test, the rotating shaft 5 drives the unloading object 4 to rotate under the drive of the motor in the passive unloading state of the counterweight 34 and the compensation counterweight 35, the connecting plate 22 on the screw assembly 23 is driven by the speed reducer 21 to slide along the guide rail, so that the lifting rope always vertically follows the motion trail of the unloading object 4, ensuring high unloading accuracy of the system, the counterweight 34 can move up and down, and the compensation counterweight 35 is installed on the counterweight 34 during the unfolding test and is used for compensating the unloading error of the system, and is removed during the folding test, so as to complete the vertical zero-gravity flip unfolding and folding test of the unloading object 4.

[0035] The control mode of the embodiment is controlled by a controller, the control circuit of the controller can be realized by simple programming of those skilled in the art, the power supply also belongs to the common knowledge in the art, and the text is mainly used to protect the mechanical device, and the control mode and circuit connection are not explained in detail

[0036] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vertically inverted, spread zero-gravity unloading system characterized by: The utility model provides a kind of vertical zero gravity flip test device of unloading object, including support structure, linear motion mechanism (2) and pulley hanging assembly (3), support structure is fixedly installed linear motion mechanism (2) on, and linear motion mechanism (2) lower end is fixedly installed pulley hanging assembly (3), pulley hanging assembly (3) lower end is fixedly connected to unloading object (4), linear motion mechanism (2) includes reduction motor (21), connecting plate (22), screw rod assembly (23) and sliding assembly (24), the side of connecting plate (22) is provided with one sliding assembly (24) respectively, and the periphery of each sliding assembly (24) is fixedly connected to the upper end of support structure, the lower end of connecting plate (22) is provided with two pulley hanging assemblies (3), and two pulley hanging assemblies (3) are mutually parallelly arranged, and one end of each pulley hanging assembly (3) is fixedly connected to unloading object (4), one end of screw rod assembly is fixedly connected to reduction motor (21), and the periphery of reduction motor (21) is fixedly connected to the upper end of support structure, one end of screw rod assembly (23) is fixedly connected to the lower end middle part of connecting plate (22). Pulley hanging assembly (3) includes first fixed pulley (31), second fixed pulley (32), rope (33) and counterweight (34), first fixed pulley (31) and second fixed pulley (32) are mutually parallelly arranged, the upper end of first fixed pulley (31) is fixedly connected to the lower end of connecting plate (22), the upper end of second fixed pulley (32) is fixedly connected to the upper end of support structure, one end of rope (33) is fixedly connected to unloading object (4), the other end of rope (33) is fixedly connected to the periphery of counterweight (34) after sequentially extending along the periphery of first fixed pulley (31) and the periphery of second fixed pulley (32). Counterweight (34) periphery detachably installs compensation counterweight (35);First fixed pulley (31) is installed on connecting plate (22), can move with connecting plate (22) on guide rail;Second fixed pulley (32) is fixed on support structure, rope (33) passes through first fixed pulley (31) and second fixed pulley (32), and is connected with counterweight (34), counterweight (34) and compensation counterweight (35) are composed of multiple small counterweights, and the weight can be adjusted; Counterweight (34) can move up and down, compensation counterweight (35) is installed on counterweight (34) during unfolding test, is used for compensating unloading error of system, is taken down when folding test, to complete the vertical zero gravity flip test of unloading object (4) unfolding, folding test.

2. A vertically flipping and unfolding zero-gravity unloading system according to claim 1, characterized in that: Screw rod assembly (23) includes screw rod and nut, one end of screw rod is fixedly connected to one end of reduction motor (21), and screw rod is threadedly connected to the inner ring of nut, and the periphery of nut is fixedly connected to the lower end middle part of connecting plate (22).

3. A vertically flipping and unfolding zero-gravity unloading system according to claim 1, characterized in that: Sliding assembly (24) includes slide rail (241) and sliding block (242), and the periphery of slide rail (241) is fixedly connected to the upper end of support structure, and the periphery of slide rail (241) is slidably connected to one end of sliding block (242), and the other end of sliding block (242) is fixedly connected to the upper end of connecting plate (22).

4. A vertically flipping and unfolding zero-gravity unloading system according to claim 3, characterized in that: Slide rail (241) is linear guide rail or air floating guide rail.

5. A vertically flipping and unfolding zero-gravity unloading system according to claim 1, characterized in that: Support structure is steel structure truss or ball head ball rod truss.

6. A vertically flipping and unfolding zero-gravity unloading system according to claim 1, characterized in that: The rope (33) is a steel wire rope or an aramid rope.

7. A vertically flipping and unfolding zero-gravity unloading system according to claim 1, characterized in that: The unloading object (4) comprises a body, a rotating shaft (5) and a mounting base (6), the rotating shaft (5) is arranged on one side of the body, and the periphery of the rotating shaft (5) is rotatably sleeved to the mounting base (6), the mounting base (6) is fixedly installed to a preset position, a power motor is installed on the mounting base (6), a transmission shaft of the power motor is fixedly connected to one end of the rotating shaft (5), and one lifting point (7) is arranged on each side of the body, and one end of each rope (33) is fixedly connected to the lifting point (7).

8. A vertically flipping and unfolding zero-gravity unloading system according to claim 1, characterized in that: The first fixed pulley (31) and the second fixed pulley (32) are air floating pulleys.

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