Airframe assembly tooling

Abstract

The present invention provides a fuselage assembly tool, which belongs to the technical field of rotorcraft assembly, and includes a base, a first fixing frame, a second fixing frame and a third fixing frame, wherein the first fixing frame is fixed on the base and used to fix the frame; the second fixing frame is fixed on the base and used to fix the fuselage so that the fuselage is located above the frame; the outer periphery of the third fixing frame is used to cover the hood, and is used to be detachably connected to the frame so that the hood is located at the tail of the fuselage. When the fuselage and the hood are punched with holes in the fuselage and the hood, the positions of the holes required for connecting the fuselage and the frame can be directly obtained by the frame being at the bottom of the fuselage; the positions of the holes on the hood are fixed and stable due to the fixation of the third fixing frame, thereby improving the accuracy of the measurement of the hole positions by the measuring tool, ensuring good coordination of the assembled aircraft after punching, and ensuring assembly accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of rotorcraft assembly, and more specifically, relates to an airframe assembly tool. Background Art

[0002] During the assembly process of the rotorcraft fuselage structure, high assembly accuracy needs to be ensured between parts. When installing the fuselage parts, it is necessary to first use a measuring tool to measure the appropriate position of the hole on the fuselage, then drill the hole, and finally install it. Since the fuselage is made of composite materials, the outer shell of the fuselage is soft and the outer surface is curved. During the measurement process, the fuselage may bend or collapse to a certain extent, resulting in a deviation between the position measured by the measuring tool and the actual value, and then the overall coordination of the assembled aircraft is poor and cannot meet the assembly accuracy requirements. Summary of the invention

[0003] The purpose of the present invention is to provide a fuselage assembly tool, aiming to solve the technical problem that the accuracy between the separated parts in the existing fuselage assembly does not meet the requirements, resulting in poor coordination of the fuselage.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a machine body assembly tool, comprising:

[0005] Base;

[0006] A first fixing frame, fixed on the base, for fixing the frame;

[0007] a second fixing frame, fixedly mounted on the base, and used for fixing the fuselage so that the fuselage is located above the frame; and

[0008] A third fixing frame, the outer periphery of which is used for sleeve-mounting a hood and for being detachably connected to the frame so that the hood is located at the tail of the fuselage.

[0009] As another embodiment of the present application, the first fixing frame includes:

[0010] A first frame body is fixedly mounted on the base, and a front end of the frame is overlapped on the first frame body;

[0011] A second frame body is fixedly mounted on the base and is fixedly connected to the middle portion of the frame; and

[0012] The third frame is fixedly arranged on the base and is fixedly connected to the tail of the frame.

[0013] As another embodiment of the present application,

[0014] The first frame comprises:

[0015] A first vertical pole is fixed on the base along the vertical direction; and

[0016] baffles, two of which are symmetrically arranged on both sides of the first vertical pole, the upper parts of the baffles are tilted backwards, a bottom plate is fixed between the two baffles, and the plate surface of the bottom plate is perpendicular to the tilt direction of the baffles;

[0017] The second frame comprises:

[0018] Two second vertical poles are provided on the base, and the two second vertical poles are respectively located on two sides of the frame; and

[0019] A support plate, arranged on the top of the second upright pole, the support plate is provided with a plurality of first mounting holes for connecting with the rack, and the plurality of first mounting holes are distributed in an arc shape;

[0020] The third frame comprises:

[0021] A third vertical rod is fixed on the base along the vertical direction;

[0022] A mounting block is fixedly mounted on the top of the third vertical pole, wherein the top surface of the mounting block is an arc-shaped surface with an opening facing upward, and the arc-shaped surface is used to support the rear portion of the rack; and

[0023] Two mounting plates are fixedly connected to both sides of the mounting block respectively, and the mounting plates are provided with second mounting holes for connecting with the rack.

[0024] As another embodiment of the present application, the second fixing frame includes:

[0025] A fourth frame is fixed on the base and abuts against the front end of the fuselage;

[0026] a fifth frame body, fixedly mounted on the base, wherein the top of the fifth frame body is an arc-shaped surface with an opening facing upward, and the arc-shaped surface is used to support the middle part of the fuselage; and

[0027] The sixth frame is fixed on the base, the sixth frame is a ring frame structure, and the sixth frame is used to be clamped on the tail of the fuselage.

[0028] As another embodiment of the present application, the arc-shaped surface is provided with a plurality of protrusions, and the top surface of the protrusion is a curved surface adapted to the bottom of the fuselage.

[0029] As another embodiment of the present application, a groove for positioning the front of the frame is provided at the bottom of the inner circumference of the sixth frame.

[0030] As another embodiment of the present application, the third fixing frame is a conical structure, and one side of the third fixing frame is provided with a third mounting hole for connecting with the frame.

[0031] As another embodiment of the present application, the third fixing frame includes:

[0032] a first connecting plate, the third mounting hole being provided on the first connecting plate, and the third mounting hole being connected to the frame via a threaded connector;

[0033] an edge plate, one end of which is connected to the first connecting plate, and a plurality of edge plates are arranged around the axis of the first connecting plate, the plate surface of the edge plate is arranged perpendicular to the plate surface of the first connecting plate, and the outer edges of the plurality of edge plates constitute the conical structure; and

[0034] The second connecting plate is parallel to the first connecting plate and fixedly connected to the other end of the edge plate, and the area of ​​the second connecting plate is smaller than that of the first connecting plate.

[0035] As another embodiment of the present application, a roller is provided at the bottom of the base, and a supporting leg is further provided at the rear of the base, and the supporting leg is used to prop up the rear of the base to make the roller leave the bottom surface.

[0036] As another embodiment of the present application, a threaded hole is provided on the base, and an external thread for connecting to the threaded hole is provided on the leg.

[0037] The beneficial effect of the body assembly tool provided by the present invention is that compared with the prior art, when the body assembly tool of the present invention is used, the frame is first fixed on the first fixing frame, and then the fuselage is fixed on the second fixing frame. According to the position of the frame and the position of the fuselage, the position of the hole required for connecting the frame with the bottom of the fuselage is determined and then holes are punched, or metal parts are installed; then the third fixing frame is connected to the frame, the hood is sleeved on the third fixing frame, the edge of the hood is cut according to the shape of the third fixing frame, and under the fixing action of the third fixing frame, a measuring tool is used to mark the positions where holes need to be punched on the hood and holes are punched. After all the holes are punched, the first fixing frame, the second fixing frame and the third fixing frame are removed one by one, and finally the frame, the fuselage and the hood are assembled respectively. When the fuselage and the hood are punched with holes by the fuselage assembly tool of the present invention, the positions of the holes required for connecting the fuselage and the frame can be directly obtained through the frame being at the bottom of the fuselage; the positions of the holes on the hood are fixed stably by the third fixing frame, thereby improving the accuracy of the hole position measurement by the measuring tool, improving the position accuracy of the holes, ensuring good coordination of the assembled aircraft after the punching, and ensuring assembly accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of the three-dimensional structure of a machine body assembly tool provided in an embodiment of the present invention;

[0040] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0041] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of part B in FIG.

[0042] Figure 4 for Figure 1 Schematic diagram of the enlarged structure of part C;

[0043] Figure 5 A schematic diagram of the three-dimensional structure of a third fixing frame used in an embodiment of the present invention;

[0044] Figure 6 A schematic diagram of the use status of the machine body assembly tool provided by an embodiment of the present invention;

[0045] Figure 7 for Figure 6 Schematic diagram of the enlarged structure of the D part;

[0046] Figure 8 for Figure 6 Schematic diagram of the enlarged structure of part E in FIG.

[0047] Fig. 9 for Figure 6 Schematic diagram of the enlarged structure of part F.

[0048] In the figure: 1, base; 2, first fixed frame; 201, first frame; 201-1, first vertical pole; 201-2, baffle; 202, second frame; 202-1, second vertical pole; 202-2, support plate; 203, third frame; 203-1, third vertical pole; 203-2, mounting block; 203-3, mounting plate; 3, second fixed frame; 301, fourth frame; 302, fifth frame; 303, sixth frame; 4, third fixed frame; 401, first connecting plate; 402, edge plate; 403, second connecting plate; 5, fuselage; 6, frame; 7, hood; 8, first mounting hole; 9, bottom plate; 10, second mounting hole; 11, third mounting hole; 12, protrusion; 13, groove; 14, third connecting plate; 15, slot; 16, roller; 17, support foot. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0050] It should be noted that the term "front" in this application refers to the direction from the nose to the tail, and the term "rear" refers to the direction from the tail to the nose. Figure 1 In the figure, from front to back refers to the direction from the fourth frame 301 to the third frame 203, and from back to front refers to the direction from the third frame 203 to the fourth frame 301.

[0051] Please also read Figures 1 to 9 The machine body assembly tool provided by the present invention is now described. The machine body assembly tool comprises a base 1, a first fixing frame 2, a second fixing frame 3 and a third fixing frame 4. The first fixing frame 2 is fixed on the base 1 and used to fix the frame 6; the second fixing frame 3 is fixed on the base 1 and used to fix the fuselage 5 so that the fuselage 5 is located above the frame 6; the outer periphery of the third fixing frame 4 is used to cover the hood 7 and is used to be detachably connected to the frame 6 so that the hood 7 is located at the tail of the fuselage 5.

[0052] The frame 6, the body 5 and the cover 7 are used to form a machine body.

[0053] Compared with the prior art, the body assembly tool provided by the present invention is as follows: when in use, the frame 6 is first fixed on the first fixing frame 2, and then the fuselage 5 is fixed on the second fixing frame 3; according to the position of the frame 6 and the position of the fuselage 5, the position of the hole required for connecting the frame 6 with the bottom of the fuselage 5 is determined, and then holes are punched, or metal parts are installed; then the third fixing frame 4 is connected to the frame 6, the hood 7 is sleeved on the third fixing frame 4, the edge of the hood 7 is cut according to the shape of the third fixing frame 4, and under the fixing action of the third fixing frame 4, a measuring tool is used to mark the position where holes need to be punched on the hood 7, and holes are punched; after all the holes are punched, the first fixing frame 2, the second fixing frame 3 and the third fixing frame 4 are removed one by one, and finally the frame 6, the fuselage 5 and the hood 7 are assembled respectively. When the fuselage 5 and the hood 7 are punched with holes by the fuselage assembly tool of the present invention, the positions of the holes required for connecting the fuselage 5 and the frame 6 can be directly obtained through the frame 6 being at the bottom of the fuselage 5; the positions of the holes on the hood 7 are fixed and stable due to the fixation of the third fixing frame 4, thereby improving the accuracy of the measurement tool for the positions of the holes, improving the position accuracy of the holes, ensuring good coordination of the assembled aircraft after the punching, and ensuring assembly accuracy.

[0054] As a specific implementation of the machine body assembly tool provided by the present invention, please refer to Figure 1 and Figure 6 The first fixing frame 2 includes a first frame body 201, a second frame body 202 and a third frame body 203. The first frame body 201 is fixed on the base 1, and the front end of the frame 6 is overlapped on the first frame body 201; the second frame body 202 is fixed on the base 1 and fixedly connected to the middle part of the frame 6; the third frame body 203 is fixed on the base 1 and fixedly connected to the rear part of the frame 6. The front end, the middle end and the rear end of the frame 6 are fixed by the first frame body 201, the second frame body 202 and the third frame body 203 respectively, and the frame 6 is fixed at the bottom of the frame 6. The frame 6 cannot move freely, thereby improving the stability of the frame 6 fixation, which is conducive to the accuracy of finding the corresponding hole position on the fuselage 5 through the frame 6.

[0055] As a specific implementation of the machine body assembly tool provided by the present invention, please refer to Figures 1 to 4 , Figures 6 to 9 The first frame 201 includes a first vertical pole 201-1 and a baffle 201-2. The first vertical pole 201-1 is fixed on the base 1 along the up and down direction; two baffles 201-2 are symmetrically arranged on both sides of the first vertical pole 201-1, and the upper part of the baffle 201-2 is inclined backward. A bottom plate 9 is fixed between the two baffles 201-2, and the plate surface of the bottom plate 9 is perpendicular to the inclination direction of the baffle 9.

[0056] The second frame 202 includes a second vertical pole 202-1 and a support plate 202-2. Two second vertical poles 202-1 are provided on the base 1, and the two second vertical poles 202-1 are respectively located on both sides of the frame 6; the support plate 202-2 is arranged on the top of the second vertical pole 202-1, and a plurality of first mounting holes 8 for connecting with the frame 6 are provided on the support plate 202-2, and the plurality of first mounting holes 8 are distributed in an arc shape.

[0057] The third frame 203 includes a third vertical pole 203-1, a mounting block 203-2 and a mounting plate 203-3. The third vertical pole 203-1 is fixed on the base 1 along the up and down directions; the mounting block 203-2 is fixed on the top of the third vertical pole 203-1, and the top surface of the mounting block 203-2 is an arc-shaped surface opening upward, and the arc-shaped surface is used to support the tail of the rack 6; two mounting plates 203-3 are fixedly connected to both sides of the mounting block 203-2, and the mounting plate 203-3 is provided with a second mounting hole 10 for connecting with the rack 6.

[0058] The front end of the frame 6 is overlapped between the two baffles 201-2, wherein the front end of the frame 6 is inclined upward, so that the bottom plate 9 can fit the bottom of the front end of the frame 6 to ensure the stability of the front end of the frame 6. The front end of the frame 6 is provided with a protruding structure, and the side of the bottom plate 9 is clamped on the back of the protruding structure, so that the front end of the frame 6 is fixed; the middle part of the frame 6 is provided with two brackets on both sides, which are the normal positions for installing pulleys. The ends of the brackets are arranged on the disk for installing the pulleys. The disk is provided with an internal threaded hole for installing the pulley, and the internal threaded hole on the disk can be directly assembled with the second mounting hole 10 on the second frame body 202 to achieve the fixation of the middle part of the frame 6; the tail of the frame 6 is provided with a concave clamp with an opening downward, the mounting plate 203-3 is clamped in the depression of the concave clamp, and the concave clamp is provided with an internal threaded hole, and the internal threaded hole on the concave clamp is connected with the second mounting hole 10 through a threaded connector to achieve the fixation of the tail of the frame 6.

[0059] This structure utilizes the structure of the frame 6 itself and the holes thereon for fixing, and no other mounting holes are required on the frame 6, which does not affect the integrity of the frame 6 structure, and the frame 6 is stably fixed by the cooperation between the frame 6 structure and the bracket of the first fixing frame 2.

[0060] As a specific implementation of the machine body assembly tool provided by the present invention, please refer to Figure 1 and Figure 6 The second fixed frame 3 includes a fourth frame 301, a fifth frame 302 and a sixth frame 303. The fourth frame 301 is fixed on the base 1 and abuts against the front end of the fuselage 5; the fifth frame 302 is fixed on the base 1, and the top of the fifth frame 302 is an arc-shaped surface with an opening facing upward, and the arc-shaped surface is used to support the middle part of the fuselage 5; the sixth frame 303 is fixed on the base 1, and the sixth frame 303 is a ring frame structure, and the sixth frame 303 is used to be clamped on the tail of the fuselage 5.

[0061] During installation, firstly, the fuselage 5 is passed through the sixth frame 303 and placed on the fifth frame 302, so that the fifth frame 302 supports the entire fuselage 5, and then the fuselage 5 is moved so that the front end of the fuselage 5 is in contact with the fourth frame 301, so as to adjust the position of the fuselage 5; through the fixed frame 6 and fuselage 5, the positions of the holes required for the assembly of the frame 6 and the fuselage 5 are observed, and holes are directly punched on the fuselage 5, wherein the middle part of the fuselage 5 and the frame 6 are connected by metal parts, so the metal parts are glued to the position of the fuselage 5 corresponding to the frame 6, and the metal parts have their own holes. The fuselage 5 has holes for connection with the frame 6; there are no holes on the fuselage 5 and therefore it cannot be fixed by threaded connectors. The position of the fuselage 5 is positioned by the fourth frame 301 (i.e., it is necessary to ensure that the front end of the fuselage 5 is in contact with the fourth frame 301), and then the fuselage 5 is fixed by the sixth frame 303 to the tail of the fuselage 5. Since the fuselage 5 is relatively soft, it is supported by the fifth frame 302 to ensure the stability of the fixation of the fuselage 5, the accuracy of the relative position of the fuselage 5 and the frame 6, the accuracy of the position of the holes and the position of the metal parts, and thus the coordination of the subsequently assembled aircraft.

[0062] As a specific implementation of the machine body assembly tool provided by the present invention, please refer to Figure 1 The curved surface is provided with a plurality of protrusions 12, and the top surface of the protrusions 12 is a curved surface adapted to the bottom of the fuselage 5. The structure of the fuselage 5 is relatively soft, and the fuselage 5 needs to be moved forward and backward to adjust its position when it is fixed. The protrusions 12 protrude from the curved surface and directly contact the fuselage 5, and the top surface of the protrusions 12 fits the bottom of the fuselage 5. While playing a stable supporting role at the bottom of the fuselage 5, compared with the entire curved surface, the contact surface with the bottom of the fuselage 5 can be reduced, reducing the wear of the fuselage 5 on the bottom of the fuselage 5 during frequent movement, and ensuring the surface quality.

[0063] As a specific implementation of the machine body assembly tool provided by the present invention, please refer to Figure 1 , a groove 13 for positioning the front of the rack 6 is provided at the bottom of the inner circumference of the sixth frame 303. The rack 6 is divided into a front part and a rear part, and the front part and the rear part are detachably connected. When installing the rack 6, the front part and the rear part of the rack 6 are first disassembled, the front part is installed on the first frame 201 with its rear end in the groove 13, the rear part is installed on the second frame 202 and the third frame 203, and finally the rear part and the front part are assembled. The groove 13 assists the first fixing frame 2 to ensure that the rack 6 is stably fixed and in a relatively accurate position, and to ensure the accuracy of the relative position of the rack 6 and the fuselage 5.

[0064] As a specific implementation of the machine body assembly tool provided by the present invention, please refer to Figure 1 , Figure 5 and Figure 6The third fixing frame 4 is a conical structure, and one side of the third fixing frame 4 is provided with a third mounting hole 11 for connecting with the frame 6. The frame 6 is provided with a column on the back of the fuselage 5, and the third fixing frame 4 is connected to the column through a threaded connector, and then the hood 7 is sleeved on the outer periphery of the third fixing frame 4. The hood 7 is relatively large when it is produced, and the hood 7 is fixed to the outer periphery of the third fixing frame 4, and the excess part of the edge of the hood 7 is cut to obtain a standard hood 7 shape; the third fixing frame 4 is clamped on the inner periphery of the hood 7, and the position of the hole on the hood 7 is measured and punched by a measuring tool. The third fixing frame 4 can prevent the machine from sinking inward during the measurement or punching process, thereby ensuring the accuracy of the measurement.

[0065] As a specific implementation of the machine body assembly tool provided by the present invention, please refer to Figure 1 , Figure 5 and Figure 6 The third fixing frame 4 includes a first connecting plate 401, an edge plate 402 and a second connecting plate 403. The third mounting hole 11 is provided on the first connecting plate 401, and the third mounting hole 11 is connected to the frame 6 through a threaded connector; one end of the edge plate 402 is connected to the first mounting, and multiple edge plates 402 are provided around the axis of the first connecting plate 401. The plate surface of the edge plate 402 is perpendicularly arranged to the plate surface of the first connecting plate 401, and the outer edges of the multiple edge plates 402 form a conical structure; the second connecting plate 403 is parallel to the first connecting plate 401 and fixed to the other end of the edge plate 402, and the area of ​​the second connecting plate 403 is smaller than that of the first connecting plate 401. The third fixing frame 4 is assembled first and then connected to the frame 6. When assembling the third fixing frame 4, one end of each edge plate 402 is first fixedly connected to the first connecting plate 401, and then the second connecting plate 403 is installed on the other end of the edge plate 402, that is, the assembly of the third fixing frame 4 is completed, and the assembled third fixing frame 4 is connected to the frame 6. This structure can not only ensure the stable fixation of the hood 7, but also save materials, reduce manufacturing costs, have a simple structure, be easy to operate, and reduce labor intensity.

[0066] In this embodiment, the first connecting plate 401 and the second connecting plate 403 are both provided with a slot 15 for connecting with the edge plate 402. The third fixing frame 4 is assembled by connecting the slot 15 with the edge plate 402. No other connecting parts are required, the use of parts is reduced, and installation is convenient.

[0067] Specifically, one or more third connecting plates 14 are provided between the first connecting plate 401 and the second connecting plate 403. The third connecting plate 14 is connected to the edge plate 402 by snapping in the card slot 15. The third connecting plate 14 can fix the middle part of the edge plate 402, thereby improving the stability of the third fixing frame 4. Obviously, the more the number of third connecting plates 14 is, the stronger the stability of the third fixing frame 4 is.

[0068] As a specific implementation of the machine body assembly tool provided by the present invention, please refer to Figure 1 and Figure 6 The bottom of the base 1 is provided with a roller 16, and the tail of the base 1 is also provided with a leg, which is used to prop up the tail of the base 1 so that the roller 16 is separated from the bottom surface. By arranging the roller 16 at the bottom of the base 1, the movement of the entire tooling can be facilitated. After moving to a suitable position, the roller 16 is separated from the bottom surface by the leg 17 to prevent the tooling from shaking, thereby ensuring the stability of the entire tooling during the drilling and measurement process.

[0069] As a specific implementation of the machine body assembly tool provided by the present invention, please refer to Figure 1 and Figure 6 , the base 1 is provided with a threaded hole, and the legs are provided with external threads for connecting with the threaded hole. Preferably, the support leg 17 is provided with a rotating handle. When the base 1 needs to be moved, the bottom of the support leg 17 is higher than the bottom surface of the roller 16. At this time, the roller 16 is in contact with the ground, and the position of the tooling can be moved by pushing the tooling; after moving to a suitable position, turn the handle so that the support leg 17, under the rotation cooperation with the threaded hole, the bottom of the support leg 17 extends until it is flush with the bottom surface of the roller 16, and continue to turn the handle, the support leg 17 lifts the rear of the tooling, so that the roller 16 is separated from the bottom surface, and the tooling is fixed, which is simple to operate.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The machine body assembly tool is characterized by: include: Base; A first fixing frame, fixed on the base, for fixing the frame; A second fixing frame, fixed on the base, used for fixing the fuselage so that the fuselage is located above the frame; as well as A third fixing frame, the outer periphery of which is used for sleeve-mounting a hood and for being detachably connected to the frame so that the hood is located at the tail of the fuselage.

2. The machine body assembly tool according to claim 1, characterized in that: The first fixing frame comprises: A first frame body is fixedly mounted on the base, and a front end of the frame is overlapped on the first frame body; A second frame body is fixedly mounted on the base and is fixedly connected to the middle portion of the frame; and The third frame is fixedly arranged on the base and is fixedly connected to the rear of the frame.

3. The machine body assembly tool according to claim 2, characterized in that: The first frame comprises: A first vertical pole is fixed on the base along the vertical direction; and baffles, two of which are symmetrically arranged on both sides of the first vertical pole, the upper parts of the baffles are tilted backwards, a bottom plate is fixed between the two baffles, and the plate surface of the bottom plate is perpendicular to the tilt direction of the baffles; The second frame comprises: Two second vertical poles are provided on the base, and the two second vertical poles are respectively located on two sides of the frame; and A support plate, arranged on the top of the second upright pole, the support plate is provided with a plurality of first mounting holes for connecting with the rack, and the plurality of first mounting holes are distributed in an arc shape; The third frame comprises: A third vertical rod is fixed on the base along the vertical direction; A mounting block is fixedly mounted on the top of the third vertical pole, wherein the top surface of the mounting block is an arc-shaped surface with an opening facing upward, and the arc-shaped surface is used to support the rear portion of the rack; and Two mounting plates are fixedly connected to both sides of the mounting block respectively, and the mounting plates are provided with second mounting holes for connecting with the rack.

4. The machine body assembly tool according to claim 1, characterized in that: The second fixing frame comprises: A fourth frame is fixed on the base and abuts against the front end of the fuselage; a fifth frame body, fixedly mounted on the base, wherein the top of the fifth frame body is an arc-shaped surface with an opening facing upward, and the arc-shaped surface is used to support the middle part of the fuselage; and The sixth frame is fixed on the base, the sixth frame is a ring frame structure, and the sixth frame is used to be clamped on the tail of the fuselage.

5. The machine body assembly tool according to claim 4, characterized in that: The arc surface is provided with a plurality of protrusions, and the top surface of the protrusion is a curved surface adapted to the bottom of the fuselage.

6. The machine body assembly tool according to claim 4, characterized in that: The bottom of the inner circumferential surface of the sixth frame is provided with a groove for positioning the front part of the frame.

7. The machine body assembly tool according to claim 1, characterized in that: The third fixing frame is a conical structure, and one side of the third fixing frame is provided with a third mounting hole for connecting with the frame.

8. The machine body assembly tool according to claim 7, characterized in that: The third fixing frame comprises: a first connecting plate, the third mounting hole being provided on the first connecting plate, and the third mounting hole being connected to the frame via a threaded connector; an edge plate, one end of which is connected to the first connecting plate, and a plurality of edge plates are arranged around the axis of the first connecting plate, the plate surface of the edge plate is arranged perpendicular to the plate surface of the first connecting plate, and the outer edges of the plurality of edge plates constitute the conical structure; and The second connecting plate is parallel to the first connecting plate and fixedly connected to the other end of the edge plate, and the area of ​​the second connecting plate is smaller than that of the first connecting plate.

9. The machine body assembly tool according to claim 1, characterized in that: The bottom of the base is provided with a roller, and the tail of the base is also provided with a supporting leg, and the supporting leg is used to prop up the tail of the base so that the roller is separated from the bottom surface.

10. The machine body assembly tool according to claim 9, characterized in that: The base is provided with a threaded hole, and the legs are provided with external threads for connecting with the threaded hole.

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