A mid-fuselage section drilling and riveting fixed angle rotating platform

Abstract

The present invention belongs to the field of aircraft manufacturing and relates to a rotary platform for drilling and riveting fuselage sections at fixed angles. Conventional rotary platforms have low rotational accuracy. The rotary platform for drilling and riveting fuselage sections at fixed angles in the present invention comprises a base, a roller support assembly, a drive assembly, a centering assembly, and a turntable assembly. The roller support assembly is fixedly mounted on the upper end of the base, and four sets of centering assemblies are also mounted in the orthogonal direction of the upper end face of the base. The roller support assembly comprises an annular roller bracket and a plurality of radially arranged first rollers evenly mounted on the roller bracket. The centering assembly comprises an adjustment block that can be radially moved and locked. The turntable assembly comprises a turntable and a driven gear ring and a centering disc coaxially mounted on the lower side of the turntable. The driven gear ring is driven by the drive assembly to rotate about the rotation axis, thereby driving the turntable assembly to rotate. The rotational position of the drive gear is controlled by a rotary encoder. The platform can be rotated and positioned according to the required angle, achieving the product positioning accuracy during the robot's automatic drilling and riveting operation.

Description

Technical Field

[0001] The invention belongs to the field of aircraft manufacturing, and in particular relates to a fixed-angle rotating platform for drilling and riveting a middle fuselage section, which is used for rotating the middle fuselage section according to a required angle during automatic drilling and riveting. Background Art

[0002] The mid-section fuselage is shaped like a rectangular cylinder. The robot can only drill and rivet one surface at a time. After completing one surface, the robot rotates 90 degrees to drill and rivet the next surface. This ensures the robot's end effector can reach the required drilling and riveting position, ultimately completing the drilling and riveting work on all four surfaces of the mid-section.

[0003] The traditional rotating platform structure has low rotation accuracy and large gear clearance, resulting in poor turntable positioning accuracy, which cannot meet the accuracy requirements of the robot's automatic drilling and riveting work. Summary of the Invention

[0004] The purpose of the present invention is to provide a mid-fuselage section drilling and riveting fixed angle rotating platform to overcome the problem of low precision of existing rotating platforms.

[0005] The present invention proposes a mid-fuselage section drilling and riveting fixed angle rotating platform, comprising a base, a roller support assembly, a drive assembly, a centering assembly and a turntable assembly, wherein

[0006] The base is an annular rigid body, and the roller support assembly is fixedly mounted on the annular surface of its upper end. Four sets of centering assemblies are also mounted in the orthogonal direction of the upper end surface of the base. The centering assemblies are located inside the roller support assembly, and the drive assembly is mounted in the axial hole of the base.

[0007] The roller support assembly includes an annular roller bracket and a plurality of radially arranged first rollers evenly mounted on the roller bracket;

[0008] The centering assembly includes an adjustment block that can be moved radially and locked, and a second roller is provided at the inner end of the adjustment block;

[0009] The turntable assembly includes a turntable, a driven gear ring and a centering disc coaxially mounted on the lower side of the turntable, and the centering disc is located outside the driven gear ring;

[0010] The turntable assembly is placed on the upper end of the roller support assembly. The radial position of the four adjustment blocks is controlled to center the rotation axis of the turntable assembly, and the drive assembly drives the driven gear ring to rotate around the rotation axis, thereby driving the turntable assembly to rotate.

[0011] The rotational position of the drive gear is controlled by rotating the encoder.

[0012] Advantageously, the driven gear ring is an annular gear ring having gear teeth on its inner annular surface.

[0013] Advantageously, the drive assembly comprises a drive motor and a drive gear, the drive gear being engaged with the driven ring gear.

[0014] Advantageously, the cross section of the centering disc is L-shaped, and the second roller abuts against the vertical annular surface from the outside.

[0015] Advantageously, the roller bracket is provided with a positioning seat with a pin hole, and the turntable is also provided with a pin hole, which is locked by inserting a handle pin after being rotated into place.

[0016] Advantageously, a photoelectric switch is provided at the bottom of the handle latch, and the turntable is locked after the handle latch is inserted.

[0017] Advantageously, the centering assembly comprises a bottom plate mounted on the base, and an adjustment seat with a threaded hole is provided on the bottom plate, and the position of the adjustment block is radially adjusted by screws.

[0018] Advantageously, the base is an annular steel stand having an inner annular body and an outer annular body with a connecting frame therebetween, and the centering assembly is mounted on the connecting frame.

[0019] Advantageously, the first roller and the second roller are supported by a wheel axle and a bushing.

[0020] Advantageously, the upper end surface of the turntable assembly is provided with a fixture for clamping the center fuselage section.

[0021] The beneficial effects of the present invention are as follows: the fixed-angle rotating platform for drilling and riveting the middle fuselage section of the present invention can be rotated and positioned according to the required angle, thereby achieving product positioning accuracy during the robot's automatic drilling and riveting work. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The illustrative examples, together with the preferred mode of use, further objects and description thereof, will be best understood by reference to the following detailed description of examples of the invention when read in conjunction with the accompanying drawings, in which:

[0023] Figure 1 This is a diagram showing the posture of the middle fuselage section on the rotating platform;

[0024] Figure 2 This is a schematic diagram of the structural disassembly of the drilling and riveting fixed angle rotating platform of the present invention;

[0025] Figure 3 This is a schematic diagram of the overall structure of the drilling and riveting fixed angle rotating platform of the present invention;

[0026] Figure 4 yes Figure 3 A partial enlarged view of

[0027] Figure 5 It is a structural diagram of the base;

[0028] Figure 6 It is a structural diagram of the roller bracket;

[0029] Figure 7 It is a schematic diagram of the partially cutaway structure of the centering disc;

[0030] Figure 8 It is a structural diagram of the driven ring gear;

[0031] Figure 9 It is a structural diagram of the roller centering assembly.

[0032] Among them, 1-base, 2-roller support assembly, 3-drive assembly, 4-centering assembly, 5-turntable assembly, 6-roller bracket, 7-first roller, 8-drive motor, 9-drive gear, 10-driven gear ring, 11-centering disc, 12-second roller, 13-handle pin, 14-bottom plate, 15-adjustment seat, 16-adjustment block, 17-positioning seat DETAILED DESCRIPTION

[0033] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples can be described and these examples should not be construed as limited to the examples set forth herein. Instead, these examples are described so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those skilled in the art.

[0034] like Figure 1 As shown, the bottom of the large rotating platform designed in this patent is the main part of the rotating platform. The middle fuselage and its fixing fixture are installed on the rotating platform and fixed to the rotating part of the platform. It can rotate with the platform along the axis with high precision.

[0035] like Figure 2 As shown, the large rotating platform provided in this application mainly comprises a base 1, a roller support assembly 2, a drive assembly 3, a centering assembly 4, and a turntable assembly 5.

[0036] like Figure 3 As shown, the base 1 is an annular rigid body, and the roller support assembly 2 is fixedly mounted on the annular surface at its upper end. Four sets of centering assemblies 4 are also mounted in the orthogonal direction of the upper end surface of the base 1. The centering assembly 4 is on the inner side of the roller support assembly 2, and the drive assembly 3 is mounted in the axial hole of the base 1.

[0037] like Figure 4As shown, the roller support assembly 2 primarily consists of a roller bracket 6 and 30 first rollers 7. Each first roller 7 is mounted on the roller bracket 6 via an axle and embedded with a bearing, allowing it to roll freely on the bracket. The roller bracket 6 is provided with a positioning seat 17 with a pin hole for locking the turntable assembly 5. The pin hole is flanked by mounting holes for installing a photoelectric switch.

[0038] like Figure 5 The drive motor 8 and drive gear 9 are mounted on the base. When powered, they drive the driven ring gear 10, which is screwed to the turntable assembly 5, thereby driving the entire turntable assembly. The top of the drive gear 9 is connected to a rotary encoder via a bracket, which controls the turntable's rotational accuracy through encoder feedback.

[0039] The centering disc 11 is fixed to the turntable assembly 5. Four sets of centering assemblies 4 are located on the outside. Four sets of second rollers 12 are positioned in a counter-rotating manner, securing the rotational axis of the centering disc 11. This ensures that the turntable assembly 5 can always rotate around the center axis of the centering disc 11, ensuring rotational accuracy. Once fully rotated, the turntable is locked in position using a handle latch 13. A photoelectric switch is located at the base of the handle latch 13. Inserting the handle latch 13 locks the motor, preventing the turntable from rotating.

[0040] like Figure 6 As shown, the centering disc 11 is an annular component with an L-shaped cross-section and a precision-machined outer surface. Four sets of rollers in the centering assembly 4 rest against the vertical outer annular surface from the outside, securing the centering disc's axis. The centering disc is screwed upward from the bottom to the bottom of the turntable assembly 5 and is coaxially assembled with the driven ring gear 10.

[0041] like Figure 7 As shown, the driven gear ring 10 is a ring gear, the gear teeth of which are located inside the ring and mesh with the driving gear 9. The driven gear ring 10 is mounted on the bottom of the turntable assembly 5 from bottom to top and is coaxially assembled with the centering disc 11.

[0042] like Figure 8 , Figure 9 As shown, the centering assembly 4 mainly consists of a base plate 14, an adjustment seat 15 with threaded holes on the base plate 14, an adjustment block 16, and second rollers 12. The centering assembly is mounted on the turntable assembly 5, with a total of four sets of centering assemblies evenly spaced 90 degrees around the circumference. This ensures that the centering disc 11 can rotate around the axis formed by the four sets of second rollers 12.

[0043] Different examples of the systems, apparatuses, and methods disclosed herein include various components, features, and functions. It should be understood that various examples of the systems, apparatuses, and methods disclosed herein may include any of the components, features, and functions of any of the other examples of the systems, apparatuses, and methods disclosed herein in any combination or any subcombination, and all such possibilities are intended to fall within the scope of the present invention.

[0044] The description of various advantageous arrangements has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the examples disclosed. Many modifications and variations will be apparent to those skilled in the art. In addition, different advantageous examples may describe different advantages compared to other advantageous examples. The selected example or examples are chosen and described to best illustrate the principles of the examples, their practical application, and to enable those skilled in the art to understand the disclosure with various examples with various modifications suitable for the particular use contemplated.

Claims

1. A mid-fuselage section drilling and riveting fixed angle rotating platform, characterized by: It comprises a base (1), a roller support assembly (2), a drive assembly (3), a centering assembly (4) and a turntable assembly (5), wherein The base (1) is an annular rigid body, and the roller support assembly (2) is fixedly mounted on the annular surface at the upper end thereof. Four sets of centering assemblies (4) are also mounted in the orthogonal direction of the upper end surface of the base (1). The centering assemblies (4) are located inside the roller support assembly (2) and fix the rotation axis of the centering disc (11). The driving assembly (3) is mounted in the axial hole of the base (1). The roller support assembly (2) comprises an annular roller bracket (6) and a plurality of radially arranged first rollers (7) evenly mounted on the roller bracket (6); The centering assembly (4) comprises a radially movable and lockable adjustment block (16), and a second roller (12) is provided at the inner end of the adjustment block (16); The turntable assembly (5) includes a turntable, a driven gear ring (10) and a centering disc (11) coaxially mounted on the lower side of the turntable, and the centering disc (11) is located outside the driven gear ring (10); The turntable assembly (5) is placed on the upper end of the roller support assembly (2), and the rotation axis of the turntable assembly (5) is centered by controlling the radial positions of the four adjustment blocks (16), and the driven ring gear (10) is driven by the driving assembly (3) to rotate around the rotation axis, thereby driving the turntable assembly (5) to rotate; The rotational position of the drive gear (9) is controlled by rotating the encoder.

2. The mid-fuselage section drilling and riveting angle rotation platform according to claim 1, characterized in that: The driven gear ring (10) is an annular gear ring having gear teeth on its inner ring surface.

3. The mid-fuselage section drilling and riveting angle rotation platform according to claim 2, characterized in that: The driving assembly (3) comprises a driving motor (8) and a driving gear (9), wherein the driving gear (9) is meshed with the driven ring gear (10).

4. The mid-fuselage section drilling and riveting angle rotation platform according to claim 1, characterized in that: The cross section of the centering disc (11) is L-shaped, and the second roller (12) abuts against the annular surface in the vertical direction from the outside.

5. The mid-fuselage section drilling and riveting angle rotation platform according to claim 1, characterized in that: The roller bracket (6) is also provided with a positioning seat (17) with a pin hole, and the turntable is also provided with a pin hole, which is locked by inserting a handle latch (13) after being rotated into place.

6. The mid-fuselage section drilling and riveting angle rotation platform according to claim 5, characterized in that: A photoelectric switch is provided at the bottom of the handle latch (13), and the turntable is locked after the handle latch (13) is inserted.

7. The mid-fuselage section drilling and riveting angle rotation platform according to claim 1, characterized in that: The centering assembly (4) has a base plate (14) mounted on the base (1), and an adjustment seat (15) with a threaded hole is provided on the base plate (14), and the position of the adjustment block (16) is radially adjusted by screws.

8. The mid-fuselage section drilling and riveting angle rotation platform according to claim 1, characterized in that: The base (1) is an annular steel stand having an inner annular body and an outer annular body, with a connecting frame between the inner annular body and the outer annular body, and the centering assembly (4) is mounted on the connecting frame.

9. The mid-fuselage section drilling and riveting angle rotation platform according to claim 1, characterized in that: The first roller (7) and the second roller (12) are supported by a wheel axle and a shaft sleeve.

10. The mid-fuselage section drilling and riveting angle rotation platform according to claim 1, characterized in that: A fixture for clamping the center fuselage section is provided on the upper end surface of the turntable assembly (5).

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