A low-stress assembly device for components in vertical direction

Abstract

A low-stress assembly device for components in the vertical direction solves the problem of how to improve the performance of ground assembly devices for aerospace products and belongs to the field of aerospace assembly technology. The present invention includes a support unit, a suspension unit and a support frame; the support unit and the suspension unit are both fixed on the support frame; component A is installed on the support unit, and component B is suspended below the suspension unit; the support unit adopts multi-point support, and each support point is provided with a pressure sensor for collecting the support force of the corresponding support point. The support unit is also used to adjust the position of the component A to be assembled in the Z axis, around the X axis, and around the Y axis; the suspension unit adopts single-point suspension, and is provided with a tension sensor for collecting the tension of the suspension point. The suspension unit is also used to adjust the position of component B in the X, Y, Z axis and around the Z axis; the suspension unit and the support unit are used to make components A and B perform six-degree-of-freedom relative motion, respectively, to realize the assembly of components A and B.

Description

Technical Field

[0001] The invention relates to a low-stress assembly device for two components in a vertical direction, belonging to the technical field of aerospace assembly. Background Art

[0002] Aerospace products operate in the microgravity, high temperature gradients, and intense radiation environment of space for extended periods. To ensure high reliability and longevity in orbit, they must undergo precise ground-based assembly and adjustment. During ground-based assembly, the gravity environment causes structural deformation in weak components of aerospace products, generating additional stress. During service in space, the weightless environment releases these additional stresses, and the recovery of these structural deformations alters the contact state of assembly surfaces, causing changes in aerospace product performance. Therefore, the assembly accuracy and test performance of aerospace products on the ground do not fully reflect their performance in space. Therefore, low-stress assembly devices are needed to improve the ground-based assembly performance of spacecraft and better enable the in-orbit operation of aerospace products. Summary of the Invention

[0003] In order to solve the problem of how to improve the performance of ground assembly devices for aerospace products, the present invention provides a low-stress assembly device for components in the vertical direction.

[0004] A low-stress assembly device for components in a vertical direction of the present invention comprises a support unit 1, a suspension unit 2 and a support frame 3;

[0005] The support unit 1 and the suspension unit 2 are both fixed on the support frame 3, and the support frame 3 serves as a bearing platform;

[0006] Assembly component A is installed on the support unit 1, and assembly component B is suspended below the suspension unit 2, with assembly component A located below assembly component B;

[0007] The support unit 1 adopts multi-point support, and each support point is provided with a pressure sensor 9 for collecting the support force of the corresponding support point. The support unit 1 is also used to adjust the position of the assembly component A in the Z-axis direction, the X-axis direction, and the Y-axis direction;

[0008] The suspension unit 2 adopts a single-point suspension and is provided with a tension sensor for collecting the tension at the suspension point. The suspension unit 2 is also used to adjust the position of the assembly component B in the X-axis direction, the Y-axis direction, the Z-axis direction, and the direction around the Z-axis;

[0009] The assembly component A and the assembly component B are respectively made to perform six-degree-of-freedom relative motion through the suspension unit 2 and the support unit 1, thereby achieving the assembly of the assembly component A and the assembly component B;

[0010] The Z-axis direction is the height direction, the X-axis direction is the pitch direction, the Y-axis direction is the yaw direction, and the Z-axis direction is the roll direction.

[0011] Preferably, the support unit 1 includes a support plate 7 and four groups of connection components, and the four groups of connection components are distributed on the support plate 7;

[0012] Each connecting assembly includes a height adjustment mechanism 8, a pressure sensor 9 and a connecting piece 10.

[0013] The height adjustment mechanism 8 of the four connecting components No. 1 is raised or lowered at the same time to achieve adjustment in the Z-axis direction;

[0014] The No. 1 height adjustment mechanism 8 of the four sets of connection components can be adjusted in the Y-axis direction and the X-axis direction by differential movement between the two.

[0015] One end of the pressure sensor 9 is fixed on the No. 1 height adjustment mechanism 8 , and the other end of the pressure sensor 9 is connected to the No. 1 connecting piece 10 , which is used to connect the component A to be assembled.

[0016] Preferably, the height adjustment mechanism No. 1 8 includes a mounting base 11, a height adjustment block 12, and a two-way bolt 13;

[0017] The mounting base 11 is fixed to the support plate 7, the forward thread of the two-way bolt is set on the mounting base 11, and the reverse thread is set on the height adjustment block 13. The height adjustment block 12 is located above the mounting base 11. The two-way bolt passes through the mounting base 11 and the height adjustment block 13, and the thread of the two-way bolt is engaged with the forward thread of the mounting base 11 and the reverse thread of the height adjustment block 13. The height of the height adjustment block 12 is adjusted by adjusting the two-way bolt 13.

[0018] One end of the pressure sensor 9 is fixed on the height adjustment block 12 .

[0019] Preferably, the support frame 3 includes a support base plate 4 , a steel frame 5 and a counterweight 6 .

[0020] The supporting base plate 4 is arranged at the bottom of the steel frame 5 , and the counterweight 6 is arranged on the supporting base plate 4 . The supporting unit 1 and the suspension unit 2 are both fixed on one side of the steel frame 5 , and the counterweight 6 is located on the other side of the steel frame 5 .

[0021] Preferably, the suspension unit 2 includes a horizontal two-degree-of-freedom adjustment block 14, a connecting seat 15, a No. 1 ball bearing 16, a tension sensor 17, a rolling device 18, a No. 2 height adjustment mechanism 19, a No. 2 ball bearing 20, a lifting lug 21, a horizontal hanging plate 22, and a connecting piece 23;

[0022] The horizontal two-degree-of-freedom adjustment block 14 is arranged on the upper part of the support frame 3. The support frame 3 is provided with a long hole in the Y-axis direction. The horizontal two-degree-of-freedom adjustment block 14 can move along the Y-axis direction in the Y-axis long hole; the connecting seat 15 is fixed to the bottom of the horizontal two-degree-of-freedom adjustment block 14. The horizontal two-degree-of-freedom adjustment block 14 is provided with a long hole in the X-axis direction. The connecting seat 15 can move along the X-axis direction in the X-axis long hole;

[0023] The tension sensor 17 is located below the connecting seat 15. One detection end of the tension sensor 17 is connected to the connecting seat 15 through a No. 1 ball bearing 16. The tension sensor 17 can move around the connecting seat 15 in the X-axis direction.

[0024] The rolling device 18 is located below the tension sensor 17, and the No. 2 height adjustment mechanism 19 is located below the rolling device 18. Two upper and lower bearings are fixed inside the rolling device 18. The other detection end of the tension sensor 17 is fixedly connected to the shaft of the upper bearing inside the rolling device 18. The shaft of the lower bearing inside the rolling device 18 is provided with an external thread and is connected to the top of the No. 2 height adjustment mechanism 19.

[0025] The tension sensor 17 and the No. 2 height adjustment mechanism 19 can move around the Z-axis. The bottom end of the No. 2 height adjustment mechanism 19 is connected to the ear 21 through the No. 2 ball bearing 20. The No. 2 height adjustment mechanism 19 can move around the Y-axis around the rotation axis of the ear 21. The top and bottom ends of the No. 2 height adjustment mechanism 19 are connected by positive and negative threads respectively, and can move in the Z-axis direction through the positive and negative threads.

[0026] The lifting lug 21 is connected to a connecting piece 23 , which is used to connect the assembly component B.

[0027] The beneficial effect of the present invention is that, for aerospace components arranged up and down, low-stress assembly of the two components in the vertical direction can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the low stress assembly device of the present invention;

[0029] Figure 2 is a structural diagram of the support unit;

[0030] Figure 3 It is a structural diagram of height adjustment mechanism No. 1;

[0031] Figure 4 It is a structural diagram of the suspension unit;

[0032] Figure 5 is a schematic diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0036] A component vertical low-stress assembly device of this embodiment includes a support unit 1, a suspension unit 2 and a support frame 3;

[0037] The support unit 1 and the suspension unit 2 are both fixed on the support frame 3, and the support frame 3 serves as a bearing platform;

[0038] Assembly component A is installed on the support unit 1, and assembly component B is suspended below the suspension unit 2, with assembly component A located below assembly component B;

[0039] The support unit 1 adopts multi-point support, and each support point is provided with a pressure sensor 9 for collecting the support force of the corresponding support point. The support unit 1 is also used to adjust the position of the assembly component A in the Z-axis direction, the X-axis direction, and the Y-axis direction;

[0040] The suspension unit 2 adopts a single-point suspension and is provided with a tension sensor for collecting the tension at the suspension point. The suspension unit 2 is also used to adjust the position of the assembly component B in the X-axis direction, the Y-axis direction, the Z-axis direction, and the direction around the Z-axis;

[0041] The assembly component A and the assembly component B are respectively made to perform six-degree-of-freedom relative motion through the suspension unit 2 and the support unit 1, thereby achieving the assembly of the assembly component A and the assembly component B;

[0042] The Z-axis direction is the height direction, the X-axis direction is the pitch direction, the Y-axis direction is the yaw direction, and the Z-axis direction is the roll direction.

[0043] The assembly process is as follows: place component A on support unit 1, hang component B on suspension unit 2, and level the entire support frame to ensure that the force sensor can truly reflect the gravity of component A and component B. Use pressure sensors and tension sensors to measure and record the support force of each support point and suspension point. 支撑力 and suspension force ξ 悬吊力; Measure the position error of the assembly interface of parts A and B, and use the support unit 1 and the suspension unit 2 to adjust the relative position and posture of parts A and B so that the axis of the assembly interface of parts A and B coincide; the support unit 1 and the suspension unit 2 jointly realize the relative adjustment of the six degrees of freedom of the two parts assembled in the vertical direction: use the support unit 1 and the suspension unit 2 to adjust the position of parts A and B in the Z axis direction so that parts A and B are close to each other in the vertical direction; after the assembly interfaces of parts A and B contact each other, obtain the support force δ measured by the pressure sensor and the tension sensor at this time 支撑力 and suspension force δ 悬吊力 , and the supporting force ξ 支撑力 and suspension force ξ 悬吊力 By comparing the changes in force, the interaction force between the assembly interfaces is determined, and the relative position and posture of parts A and B are adjusted using support unit 1 and suspension unit 2 until the support force and suspension force measured by the pressure sensor and tension sensor are equal to the support force ξ 支撑力 and suspension force ξ 悬吊力 The difference meets the tolerance requirement, and assembly is complete. The device of this embodiment can adjust the relative posture and position of two assembly components in the vertical direction. By collecting data from pressure sensors and tension sensors, the corresponding degrees of freedom are adjusted based on changes in the data. The force sensor visually monitors the stress caused by deformation during the assembly process, compensating for the gravity of the components, thereby achieving low-stress assembly.

[0044] In a preferred embodiment, the support frame 3 includes a support base plate 4, a steel frame 5 and a counterweight 6;

[0045] The support base plate 4 is positioned at the bottom of the steel frame 5 and arranged radially along its length, expanding the support area and improving resistance to overturning during assembly of the two components. A counterweight 6 is mounted on the support base plate 4. The support unit 1 and the suspension unit 2 are both fixed to one side of the steel frame 5, while the counterweight 6 is located on the other side. This embodiment utilizes the counterweight 6 to adjust the overall center of gravity, ensuring that the center of mass of the assembly device and assembly parts is as close to the center and lower portion of the support frame 3 as possible during assembly, thereby improving resistance to overturning and safety.

[0046] The support frame 3 provides a basic operating platform for assembly, supporting the support unit 1 and the suspension unit 2. A leveling mechanism is installed on the bottom surface of the support frame 3. In this embodiment, the upper portion of the steel frame 5 features a C-shaped opening. The suspension unit 2 is mounted above the C-shaped opening, and the support unit 1 is mounted below the C-shaped opening. The entire frame is welded from Q235 steel, ensuring minimal deformation of the support frame during assembly, minimizing the impact on assembly accuracy.

[0047] In this embodiment, support frame 3 rests on the ground or a marble platform, relying on a support floor, providing a basic operating platform for assembling the two components. Considering the high ground clearance of the two components to be assembled, steel frame 5 is welded from longer square steel to raise the overall assembly platform height, which increases the risk of the assembly process. Counterweight 6 is placed on support base plate 4 to lower the overall center of mass of the assembly device and components.

[0048] In a preferred embodiment, the support unit 1 includes a support plate 7 and four groups of connection components, and the four groups of connection components are distributed on the support plate 7;

[0049] Each connecting assembly includes a height adjustment mechanism 8, a pressure sensor 9 and a connecting piece 10.

[0050] The height adjustment mechanism 8 of the four connecting components No. 1 is raised or lowered at the same time to achieve adjustment in the Z-axis direction;

[0051] The No. 1 height adjustment mechanism 8 of the four sets of connection components can be adjusted in the Y-axis direction and the X-axis direction by differential movement between the two.

[0052] One end of the pressure sensor 9 is fixed on the No. 1 height adjustment mechanism 8 , and the other end of the pressure sensor 9 is connected to the No. 1 connecting piece 10 , which is used to connect the component A to be assembled.

[0053] The four groups of No. 1 height adjustment mechanisms 8 rise or fall simultaneously to achieve the adjustment of the required assembly parts in the height direction (Z axis);

[0054] The four sets of No. 1 height adjustment mechanisms 8 rise or fall simultaneously to achieve the adjustment of the required assembly parts in the height direction (Z axis); the differential rise and fall of each two No. 1 height adjustment mechanisms 8 can achieve the adjustment of the required assembly parts in the yaw direction (around the Y axis) and pitch direction (around the X axis);

[0055] The No. 1 height adjustment mechanism of this embodiment includes a mounting base 11, a height adjustment block 12, and a two-way bolt 13; the mounting base 11 is fixed on the support plate 7, the forward thread of the two-way bolt is set on the mounting base 11, and the reverse thread is set on the height adjustment block 13, the height adjustment block 12 is located above the mounting base 11, the two-way bolt passes through the mounting base 11 and the height adjustment block 13, the height adjustment block 12 is movable, and the thread of the two-way bolt is engaged with the forward thread of the mounting base 11 and the reverse thread of the height adjustment block 13, and the height of the height adjustment block 12 is adjusted by adjusting the two-way bolt 13; the four groups of No. 1 height adjustment mechanisms 8 are adjusted simultaneously to achieve adjustment in the height direction (Z axis); the four groups of No. 1 height adjustment mechanisms 8 are differentially adjusted in pairs to achieve adjustment in the yaw direction (around the Y axis) and pitch direction (around the X axis).

[0056] One end of the pressure sensor 9 is fixed to the height adjustment block 12 and is used to detect the pressure of the assembly components applied to the connector 10 during the assembly process.

[0057] The four sets of No. 1 height adjustment mechanisms 8 in this embodiment feature No. 1 connectors 10 and mounting bases 11 of varying heights and shapes, tailored to the interface locations of the components being assembled. To facilitate the operation and adjustment of the two-way bolts 13 and increase operating space, the corresponding locations on the mounting bases 11 are hollowed out. The two-way bolts 13 are independently designed and manufactured from M8×1 reverse bolts. Half of the two-way bolts have M6 forward threads, corresponding to the threads on the mounting base 11, while the other half have M8 reverse threads, corresponding to the threads on the height adjustment block 12. Adjusting the two-way bolts 13 adjusts the height of the height adjustment block 12, thereby adjusting the height of the components being assembled.

[0058] In the preferred embodiment, the suspension unit 2 includes a horizontal two-degree-of-freedom adjustment block 14, a connecting seat 15, a No. 1 ball bearing 16, a tension sensor 17, a rolling device 18, a No. 2 height adjustment mechanism 19, a No. 2 ball bearing 20, a lifting lug 21, a horizontal hanging plate 22, and a connecting piece 23;

[0059] The suspension unit is provided with a horizontal two-degree-of-freedom adjustment capability to compensate for machining errors: a horizontal two-degree-of-freedom adjustment block 14 is provided on the upper part of the support frame 3, and a long hole in the Y-axis direction is provided on the support frame 3, and the horizontal two-degree-of-freedom adjustment block 14 has the capability of moving along the Y-axis toward the long hole; a connecting seat 15 is fixed at the bottom of the horizontal two-degree-of-freedom adjustment block 14, and a long hole in the X-axis direction is provided on the horizontal two-degree-of-freedom adjustment block 14, and the connecting seat 15 has the capability of moving along the long hole in the X-axis direction.

[0060] The connecting seat 15 is fixed to the bottom of the horizontal two-degree-of-freedom adjustment block 14. The tension sensor 17 is located below the connecting seat 15. One detection end of the tension sensor 17 is connected to the connecting seat 15 through the No. 1 ball bearing 16. The tension sensor 17 can move around the connecting seat 15 in the X-axis direction.

[0061] The rolling device 18 is located below the tension sensor 17, and the No. 2 height adjustment mechanism 19 is located below the rolling device 18. Two upper and lower bearings are fixed inside the rolling device 18. The purpose of this design is to ensure that the components located below do not drive the sensor transmission when rotating, resulting in measurement errors; the other detection end of the tension sensor 17 is fixedly connected to the shaft of the upper bearing inside the rolling device 18, and the shaft of the lower bearing inside the rolling device 18 is provided with an external thread and is connected to the top of the No. 2 height adjustment mechanism 19. The tension sensor 17 and the No. 2 height adjustment mechanism 19 can move around the Z axis. The bottom end of the No. 2 height adjustment mechanism 19 is connected to the ear 21 through the No. 2 ball bearing 20. The No. 2 height adjustment mechanism 19 can move around the Y axis around the rotating shaft of the ear 21. The top and bottom ends of the No. 2 height adjustment mechanism 19 are connected with positive and negative threads respectively, and can move in the Z axis through the positive and negative threads;

[0062] The No. 2 height adjustment mechanism 19 of this embodiment is designed as a rectangular parallelepiped with a hollowed-out middle in consideration of factors such as ease of operation and adjustment stroke, so that the margin of the adjustment stroke can be observed with the naked eye to avoid danger.

[0063] The lifting lug 21 is connected to a connecting piece 23, which is used to connect the assembly component B;

[0064] The No. 1 ball bearing 16 and the No. 2 ball bearing 20 are both externally threaded end face ball bearings. The threaded portion of the No. 1 ball bearing 16 is connected to the tension sensor 17 , and the threaded portion of the No. 2 ball bearing 20 is connected to the bottom end of the No. 2 height adjustment mechanism 19 .

[0065] The design of the No. 1 ball bearing 16 and the No. 2 ball bearing 20 can ensure that the suspension components to be assembled maintain a vertical direction by their own gravity, so the suspension unit 2 does not need to be designed with special yaw and pitch adjustment means.

[0066] In step 2 and step 3 of this embodiment:

[0067] The adjustment method using the suspension unit 2 in the X and Y axis directions includes:

[0068] The horizontal two-degree-of-freedom adjustment block 14 drives the assembly component B to move in the long hole of the support frame 3 in the X-axis and Y-axis directions;

[0069] Adjustment methods around the Z axis include:

[0070] The roll adjustment of the assembly component B is performed by rotating the roll device 18 .

[0071] The suspension unit 2 of this embodiment further includes a horizontal hanging plate 22 , and the hanging lug 21 is connected to the connecting member 23 via the horizontal hanging plate 22 .

[0072] The real-time data measured by the five force sensors of this embodiment are collected through serial communication and integrated and displayed on the display screen, which facilitates real-time monitoring during the subsequent assembly process.

[0073] In this embodiment, the components to be assembled are adjusted in the X-axis direction, Y-axis direction, direction around the Z-axis, height Z direction, direction around the Y-axis, and direction around the X-axis through the No. 1 height adjustment mechanism 8 in the support unit 1, the horizontal two-degree-of-freedom adjustment block 14, and the No. 2 height adjustment mechanism 19 in the suspension unit 2, so that the interfaces of the two components to be assembled are aligned, thereby achieving low-stress assembly.

[0074] During the assembly process, the data of the tension sensor 17 can be collected and the corresponding degrees of freedom can be adjusted according to the changes in the data to reduce the assembly stress.

[0075] Embodiment: This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method is given, but the protection scope of the present invention is not limited to the following embodiment.

[0076] The total weight of the components 24 to be assembled is 80 kg, the total weight of the components 25 to be assembled is 40 kg, and the weight of the counterweight 6 is designed to be 150 kg. The center of gravity of the whole is moved downward and as far back as possible to ensure the safety of the assembly process.

[0077] refer to Figure 5 , place component 24 on the support unit 1 and fix it with the connector 10, connect component 25 to the connector 23 of the suspension unit 2, and design different shapes of the connector 10 and the connector 23 to avoid interference with the component body; use height adjustment mechanism No. 1 and height adjustment mechanism No. 2 to make the connecting surfaces of the two components contact, adjust the relative position and posture of the two components according to the reading change of the force sensor, control the reading change of the force sensor within a certain threshold, and complete the assembly.

[0078] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the invention. It should be understood that many modifications may be made to the illustrative embodiments, and that other arrangements may be devised, without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in ways other than those described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be employed in conjunction with other described embodiments.

Claims

1. A low-stress assembly device for components in the vertical direction, characterized in that: The device comprises a support unit (1), a suspension unit (2) and a support frame (3); The support unit (1) and the suspension unit (2) are both fixed on a support frame (3), and the support frame (3) serves as a bearing platform; The assembly component A is installed on the support unit (1), and the assembly component B is suspended below the suspension unit (2), and the assembly component A is located below the assembly component B; The support unit (1) adopts multi-point support, and each support point is provided with a pressure sensor (9) for collecting the support force of the corresponding support point. The support unit (1) is also used to adjust the position of the assembly component A in the Z-axis direction, the X-axis direction, and the Y-axis direction; The suspension unit (2) adopts a single-point suspension and is provided with a tension sensor for collecting the tension of the suspension point. The suspension unit (2) is also used to adjust the position of the assembly component B in the X-axis direction, the Y-axis direction, the Z-axis direction and the direction around the Z-axis. The assembly component A and the assembly component B are respectively caused to perform six-degree-of-freedom relative motion via the suspension unit (2) and the support unit (1), thereby achieving assembly of the assembly component A and the assembly component B; The Z-axis direction is the height direction, the X-axis direction is the pitch direction, the Y-axis direction is the yaw direction, and the Z-axis direction is the roll direction; The suspension unit (2) comprises a horizontal two-degree-of-freedom adjustment block (14), a connecting seat (15), a No. 1 ball bearing (16), a tension sensor (17), a rolling device (18), a No. 2 height adjustment mechanism (19), a No. 2 ball bearing (20), a lifting lug (21), a horizontal hanging plate (22) and a connecting piece (23); The horizontal two-degree-of-freedom adjustment block (14) is arranged on the upper part of the support frame (3), and the support frame (3) is provided with a long hole in the Y-axis direction. The horizontal two-degree-of-freedom adjustment block (14) can move along the Y-axis direction in the long hole in the Y-axis direction; the connecting seat (15) is fixed on the bottom of the horizontal two-degree-of-freedom adjustment block (14), and the horizontal two-degree-of-freedom adjustment block (14) is provided with a long hole in the X-axis direction. The connecting seat (15) can move along the X-axis direction in the long hole in the X-axis direction; The tension sensor (17) is located below the connecting seat (15). One detection end of the tension sensor (17) is connected to the connecting seat (15) through a No. 1 ball bearing (16). The tension sensor (17) can move around the connecting seat (15) in the X-axis direction. The rolling device (18) is located below the tension sensor (17), and the No. 2 height adjustment mechanism (19) is located below the rolling device (18). Two upper and lower bearings are fixed inside the rolling device (18). The other detection end of the tension sensor (17) is fixedly connected to the shaft of the upper bearing inside the rolling device (18). The shaft of the lower bearing inside the rolling device (18) is provided with an external thread and is connected to the top end of the No. 2 height adjustment mechanism (19). The tension sensor (17) and the No. 2 height adjustment mechanism (19) can move in the Z-axis direction. The bottom end of the No. 2 height adjustment mechanism (19) is connected to the ear (21) through the No. 2 ball bearing (20). The No. 2 height adjustment mechanism (19) can move in the Y-axis around the rotating shaft of the ear (21). The top and bottom ends of the No. 2 height adjustment mechanism (19) are connected by positive and negative threads respectively, and can move in the Z-axis direction through the positive and negative threads. The lifting lug (21) is connected with a connecting piece (23), and the connecting piece (23) is used to connect the assembly component B.

2. A component vertical low stress assembly device according to claim 1, characterized in that: The support unit (1) comprises a support plate (7) and four groups of connection components, wherein the four groups of connection components are distributed on the support plate (7); Each connecting assembly includes a No. 1 height adjustment mechanism (8), a pressure sensor (9) and a No. 1 connecting piece (10). The height adjustment mechanism No. 1 (8) of the four connecting components is raised or lowered simultaneously to achieve adjustment in the Z-axis direction; The No. 1 height adjustment mechanism (8) of the four sets of connection components realizes adjustment around the Y axis and around the X axis by differential movement between two of them; One end of the pressure sensor (9) is fixed on the No. 1 height adjustment mechanism (8), and the other end of the pressure sensor (9) is connected to the No. 1 connecting piece (10), and the No. 1 connecting piece (10) is used to connect the assembly part A.

3. A component vertical low stress assembly device according to claim 2, characterized in that: The first height adjustment mechanism (8) includes a mounting base (11), a height adjustment block (12), and a two-way bolt (13); The mounting base (11) is fixed on the support plate (7), the forward thread of the bidirectional bolt is arranged on the mounting base (11), and the reverse thread is arranged on the height adjustment block (13), the height adjustment block (12) is located above the mounting base (11), the bidirectional bolt passes through the mounting base (11) and the height adjustment block (13), and the thread of the bidirectional bolt is engaged with the forward thread of the mounting base (11) and the reverse thread of the height adjustment block (13), and the height of the height adjustment block (12) is adjusted by adjusting the bidirectional bolt (13); One end of the pressure sensor (9) is fixed on the height adjustment block (12).

4. A component vertical low stress assembly device according to claim 3, characterized in that: According to the different positions of the interface of the assembly component A, the connection assembly adopts No. 1 connection piece (10) and the installation base (11) of different heights and different forms.

5. The low-stress assembly device for components in vertical direction according to claim 1, characterized in that: The support frame (3) comprises a support base plate (4), a steel frame (5) and a counterweight (6); The supporting base plate (4) is arranged at the bottom of the steel frame (5), and the counterweight (6) is arranged on the supporting base plate (4). The supporting unit (1) and the suspension unit (2) are both fixed on one side of the steel frame (5), and the counterweight (6) is located on the other side of the steel frame (5).

6. A component vertical low-stress assembly device according to claim 5, characterized in that: The upper portion of the steel frame (5) adopts a C-shaped opening, the upper portion of the C-shaped opening is installed with a suspension unit (2), and the lower portion of the C-shaped opening is installed with a support unit (1).

7. The low-stress assembly device for components in vertical direction according to claim 1, characterized in that: The No. 1 ball bearing (16) and the No. 2 ball bearing (20) are both externally threaded end face ball bearings. The threaded portion of the No. 1 ball bearing (16) is connected to the tension sensor (17), and the threaded portion of the No. 2 ball bearing (20) is connected to the bottom end of the No. 2 height adjustment mechanism (19).

8. The low-stress assembly device for components in vertical direction according to claim 1, characterized in that: The suspension unit (2) further comprises a transverse suspension plate (22), and the suspension lug (21) is connected to the connecting member (23) via the transverse suspension plate (22).

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