A gravity counterbalance device

Abstract

A gravity balance device, including support adjustment assembly, base, force measurement system and connecting piece. The number of support adjustment assembly is 3 or more, which is composed of support rod, adjusting rod, force sensor seat, stop screw, one end of the support rod is connected with the base, the other end is connected with the adjusting rod; the other end of the adjusting rod is connected with the force sensor seat; the other end of the force sensor seat is matched with the installation interface of the force sensor. The force measurement system includes force sensor, acquisition analysis display instrument and test cable, the acquisition analysis display instrument is connected with the force sensor through the test cable, the force signal is collected and displayed, the force sensor is installed between the support adjustment assembly and the connecting piece, and the connecting piece is connected with the supported equipment through the screw. The utility model has the advantages of simple structure, small floor area, can realize multi-point support, clear and quantitative support force, and meets the demand of spaceflight large mass, cantilever product gravity balance support.

Description

Technical Field

[0001] This utility model relates to the field of aerospace vehicle assembly, and in particular to a gravity balancing device. Background Technology

[0002] Spacecraft often employ horizontal parking racks for assembly or testing, with the interface between the racks and the spacecraft typically consisting of end frames with significant load-bearing capacity at both ends of the spacecraft structure. Simultaneously, depending on mission requirements, spacecraft may house heavy equipment with a high center of gravity on their top. For example, the resource modules of the Tiangong space station's Wentian and Mengtian experimental modules each have sun-orienting devices and truss assemblies on their tops. During horizontal assembly or testing, the end frames of the resource module structure connect to the horizontal parking racks to achieve a horizontal configuration. However, the heavy sun-orienting devices and truss assemblies are in a significant cantilever state, which imposes substantial bending moments on the end frames of the resource module structure. Simultaneously, the cantilevered truss assemblies also exert significant bending moments on the sun-orienting devices. Prolonged exposure to these substantial bending moments can cause creep in the materials of the module structure or its mechanisms, affecting product performance. Therefore, measures must be taken to eliminate or reduce the bending moments exerted by heavy cantilever equipment on the module structure or critical mechanisms.

[0003] There are two common methods for balancing equipment weight: suspension and support. The suspension method involves erecting a gantry with hooks in the middle above the equipment, or using a crane hook to balance the weight of the equipment by slinging it on. Gantry cranes require a large area, are complex to erect, and their long-term occupation of the crane hinders aircraft assembly or testing. The support method, as the name suggests, uses brackets or other measures to lift the equipment from below. Brackets are often integrated with the horizontal parking rack; after the aircraft is parked, the bracket is placed close to the equipment's contact surface to lift it. This method is simple to design and operate, but it suffers from limitations such as a single support position, unclear support force, and inability to effectively quantify the gravitational balance state. Utility Model Content

[0004] The purpose of this invention is to provide a gravity balancing device and assembly method to meet the gravity balancing support requirements of large-mass, cantilever products in aerospace.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a gravity balancing device, including a base, wherein the bottom of the base is provided with a plurality of jacks for adjusting the height; The support adjustment assembly includes at least three support adjustment assemblies whose bottoms are fixedly connected to the top of the base, including a support rod and an installation adjustment assembly located on the top of the support rod and rotatably connected to the support rod. The installation adjustment assembly can be rotated in both directions to increase or decrease the overall height of the support adjustment assembly. The force measurement system includes a force sensor mounted on top of the mounting and adjusting assembly, a data acquisition and analysis display unit mounted on a base, and a test cable for electrically connecting the force sensor and the data acquisition and analysis display unit. A connector is disposed on the top of the support adjustment assembly and connected to the force sensor. The top of the connector is connected to the supported device by screws.

[0006] Furthermore, the support rod is arranged perpendicular to the base; one end of the support rod is a flange structure connected to the base, and the other end is provided with a right-hand threaded hole.

[0007] Furthermore, the mounting adjustment assembly includes an adjustment rod, a force sensor seat, and a stop screw; One end of the adjusting rod is provided with a right-hand stud that matches the right-hand threaded hole on the support rod, and the other end is provided with a left-hand threaded hole for installing the force sensor seat; the outer surface of the end of the adjusting rod with the left-hand threaded hole is provided with a quincunx-shaped structure. One end of the force sensor base is provided with a left-handed stud that matches the left-handed threaded hole on the adjusting rod, and the other end is provided with a mounting interface that matches the force sensor. The outer surface of the end of the force sensor base with the mounting interface is provided with a plum blossom-shaped structure.

[0008] Furthermore, the end of the adjusting rod without the plum blossom-shaped structure is recessed inward from the center to form a first smooth cylinder. The support rod has a threaded hole on the right-hand threaded hole sidewall, and the stop screw is installed on the threaded hole on the right-hand threaded hole sidewall of the support rod, and is fastened to the first smooth cylinder of the adjusting rod.

[0009] Furthermore, the force sensor seat is recessed near the plum blossom-shaped structure area to form a second smooth cylinder. The adjusting rod has a threaded hole on the left-hand threaded hole sidewall. The stop screw is installed on the threaded hole on the left-hand threaded hole sidewall of the adjusting rod and is fastened to the second smooth cylinder of the force sensor seat.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1) This utility model adopts a support method, which occupies a small area, is simple to assemble and adjust, and does not affect the assembly and testing of spacecraft tooling; 2) This utility model adopts a multi-point support method, which disperses the support force and protects the equipment support surface; 3) This utility model uses a force sensor to monitor the support force, which facilitates the control of the support force and support status; 4) This utility model uses left-hand and right-hand threaded pairs to adjust the length of the support rod, which is convenient to operate. Attached Figure Description

[0011] Figure 1A three-dimensional structural schematic diagram of the gravity balancing device provided in the embodiments of this utility model; Figure 2 A three-dimensional structural diagram of the base provided in an embodiment of this utility model; Figure 3 An exploded structural diagram of the support adjustment assembly, force sensor, and connector provided in an embodiment of this utility model; Figure 4 A partial cross-sectional view of the support adjustment assembly provided in an embodiment of this utility model; Figure 5 A three-dimensional structural diagram of the support rod provided in an embodiment of this utility model; Figure 6 A three-dimensional structural schematic diagram of the adjusting rod provided in an embodiment of this utility model; Figure 7 A three-dimensional structural schematic diagram of the force sensor holder provided in an embodiment of this utility model; Figure 8 This is a three-dimensional structural diagram of the connector provided in an embodiment of the present utility model.

[0012] Among them, 1. Base, 1a. Jack, 1b. Mounting flange, 2. Support adjustment assembly, 21. Support rod, 21a. Mounting flange, 21b. Right-hand threaded hole, 21c. Threaded hole, 22. Adjusting rod, 22a. Right-hand stud, 22b. Left-hand threaded hole, 22c. Plexicon-shaped structure, 22d. First smooth cylinder, 22e. Threaded hole, 23. Force sensor seat, 23a. Left-hand stud, 23b. Force sensor interface, 23c. Plexicon-shaped structure, 23d. Second smooth cylinder, 24. Locking screw, 3. Force measurement system, 31. Force sensor, 32. Test cable, 33. Data acquisition and analysis display, 4. Connector, 4a. Force sensor interface, 4b. Supported device interface, 5. Supported device. Detailed Implementation

[0013] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0014] like Figure 1 As shown, the gravity balancing device provided by this utility model includes a base 1, a support and adjustment assembly 2, a force measuring system 3, and a connector 4. There are four support and adjustment assemblies 2, which are vertically mounted on the base 1.

[0015] like Figures 1-2 As shown, the base 1 has 8 height-adjustable jacks 1a at the bottom and 4 mounting flanges 1b at the top that are connected to the support adjustment assembly 2.

[0016] like Figure 1 , 3As shown, the force measurement system 3 includes a force sensor 31, a data acquisition and analysis display instrument 33, and a test cable 32. The data acquisition and analysis display instrument 33 is connected to the force sensor 31 through the test cable 32, acquires force signals and displays them. The force sensor 31 is installed between the support adjustment assembly 2 and the connector 4. The connector 4 is connected to the supported device 5 by screws.

[0017] like Figures 2-3 As shown, the support adjustment assembly 2 consists of a support rod 21, an adjustment rod 22, a force sensor seat 23, and a stop screw 24.

[0018] like Figures 4-5 As shown, one end of the support rod 21 is a flange structure 21a, which is connected to the base mounting flange 1b, and the other end is a right-hand threaded hole 21b, which is connected to the adjusting rod 22.

[0019] like Figure 4 , 6 As shown, one end of the adjusting rod 22 is a right-hand threaded stud 22a, which is connected to the right-hand threaded hole 21b of the support rod, and the other end is a left-hand threaded hole 22b, which is connected to the force sensor seat 23. The outer surface has a plum blossom-shaped structure 22c.

[0020] like Figure 4 , 7 As shown, one end of the force sensor base 23 is a left-handed stud 23a, which is connected to the left-handed threaded hole 22b of the adjusting rod, and the other end is a matching mounting interface 23b for the force sensor 31. The outer surface has a plum blossom-shaped structure 23c.

[0021] like Figures 4-6 As shown, the adjusting rod 22 has a first smooth cylinder 22d, and the support rod has a threaded hole 21c on the side wall of the right-hand threaded hole 21b. The stop screw 24 is installed on the threaded hole 21c on the side wall of the right-hand threaded hole of the support rod and is fastened to the first smooth cylinder 22d of the adjusting rod.

[0022] like Figure 4 , 6 As shown in ~7, there is a second smooth cylinder 23d on the force sensor seat 23, and there is a threaded hole 22e on the side wall of the left-hand threaded hole 22b of the adjusting rod. The stop screw 24 is installed on the threaded hole 22e on the side wall of the left-hand threaded hole of the adjusting rod and is fastened to the second smooth cylinder 23d of the force sensor seat.

[0023] like Figure 3 , 8 As shown, the connector 4 is provided with an interface 4a for connecting to the force sensor 31 and an interface 4b for connecting to the supported device 5.

[0024] The working principle or process of the gravity balancing device provided by this utility model is as follows: The first step is to assemble and move the gravity balancing device under the supported equipment 5, and ensure that the support adjustment component 2 is in a vertical state by adjusting the height of the jack 1a. The second step is to loosen the stop screws 24 between the support rod 21 and the adjusting rod 22, and between the adjusting rod 22 and the force sensor seat 23. By rotating the adjusting rod 22, the support adjustment assembly 2 is extended, and the connecting piece 4 is attached to the supported equipment 5 and connected with screws. The third step is to calculate the pressure required to be borne by each of the support adjustment components 2 based on the position of the center of gravity of the supported equipment 5 and the position of the supported point. Fourth step, rotate the adjusting rod 22 to extend the support adjusting component 2 and adjust the pressure of the force sensor 31 to the calculated value; Fifth step: Iteratively adjust each support adjustment component 2 to ensure that the pressure of each force sensor 31 meets the requirements; Step 6: Tighten the stop screws 24 between the support rod 21 and the adjustment rod 22, and between the adjustment rod 22 and the force sensor seat 23 on each support adjustment assembly 2.

[0025] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A gravity balancing device, characterized in that, include: The base has several jacks at its bottom for adjusting the height. The support adjustment assembly includes at least three support adjustment assemblies whose bottoms are fixedly connected to the top of the base, including a support rod and an installation adjustment assembly located on the top of the support rod and rotatably connected to the support rod. The installation adjustment assembly can be rotated in both directions to increase or decrease the overall height of the support adjustment assembly. The force measurement system includes a force sensor mounted on top of the mounting and adjusting assembly, a data acquisition and analysis display unit mounted on a base, and a test cable for electrically connecting the force sensor and the data acquisition and analysis display unit. A connector is disposed on the top of the support adjustment assembly and connected to the force sensor. The top of the connector is connected to the supported device by screws.

2. The gravity balancing device as described in claim 1, characterized in that: The support rod is arranged perpendicular to the base; one end of the support rod is a flange structure that is connected to the base, and the other end is provided with a right-hand threaded hole.

3. The gravity balancing device as described in claim 2, characterized in that: The installation adjustment assembly includes an adjustment rod, a force sensor seat, and a stop screw; One end of the adjusting rod is provided with a right-hand stud that matches the right-hand threaded hole on the support rod, and the other end is provided with a left-hand threaded hole for installing the force sensor seat; the outer surface of the end of the adjusting rod with the left-hand threaded hole is provided with a quincunx-shaped structure. One end of the force sensor base is provided with a left-handed stud that matches the left-handed threaded hole on the adjusting rod, and the other end is provided with a mounting interface that matches the force sensor. The outer surface of the end of the force sensor base with the mounting interface is provided with a plum blossom-shaped structure.

4. A gravity balancing device as described in claim 3, characterized in that: The end of the adjusting rod without the plum blossom-shaped structure is recessed inward from the center to form a first smooth cylinder. The support rod has a threaded hole on the side wall of the right-hand threaded hole. The stop screw is installed on the threaded hole on the side wall of the right-hand threaded hole of the support rod and is fastened to the first smooth cylinder of the adjusting rod.

5. A gravity balancing device as described in claim 3, characterized in that: The force sensor seat is recessed near the plum blossom-shaped structure area to form a second smooth cylinder. The adjusting rod has a threaded hole on the side wall of the left-hand threaded hole. The stop screw is installed on the threaded hole on the side wall of the left-hand threaded hole of the adjusting rod and is fastened to the second smooth cylinder of the force sensor seat.

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