Aerospace self-locking nut closing and polishing device

Abstract

The application discloses a closing polishing device for aerospace self-locking nuts, which comprises a rack main body, a mounting shaft seat fixed on one side of the rack main body, an inner shaft rod rotatably arranged in the mounting shaft seat, an upper shaft disc fixed on the inner shaft rod, a driving motor arranged on one side of the rack main body, an output end of the driving motor connected with the upper shaft disc through a transmission belt, a threaded shaft column fixed above the upper shaft disc and used for self-locking nut thread sleeve connection, a rough polishing device vertically arranged above the upper shaft disc and capable of performing primary polishing on the closing upper end surface of the self-locking nut, and a continuous polishing assembly arranged on one side of the rough polishing device and capable of performing secondary polishing on the closing of the self-locking nut based on a previous polishing process of the rough polishing device.

Description

Technical Field

[0001] This invention belongs to the field of aerospace technology, specifically a grinding device for the closing of aerospace self-locking nuts. Background Technology

[0002] Self-locking nuts used in industries such as aerospace employ a compression method to compress the screw hole at the end of the nut. This causes radial plastic deformation of the screw hole at the end, making its radial dimension smaller than that of the connected screw. This ensures a tight connection between the nut and the screw, preventing loosening. Depending on the structure, size, and application conditions, self-locking nuts are classified into two-point, three-point, four-point, and elliptical types. The accuracy of the radial deformation of the screw hole at the end of the nut is crucial to ensuring the anti-loosening effect when the self-locking nut is connected to the screw. Currently, there are two main methods for processing the end cap of nuts: using a punch press combined with an end cap die and using a hydraulic end cap machine combined with an end cap die. In both of these methods, some burrs or protrusions remain at the edges and corners of the self-locking nut after the end cap process, affecting the actual fit. Although the existing grinding devices can effectively grind the burrs, their grinding precision is low, resulting in a gap in the fit of the self-locking nut during use. At the same time, burrs will still remain at the edge of the end cap during grinding, requiring subsequent finishing.

[0003] Therefore, those skilled in the art have provided a grinding device for the closing of aerospace self-locking nuts to solve the problems mentioned in the background art. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a grinding device for the closing of aerospace self-locking nuts, comprising:

[0005] Main frame;

[0006] A mounting bearing is fixed to one side of the main body of the frame, and an inner shaft is rotatably provided inside the mounting bearing.

[0007] The upper shaft disc is fixed to the inner shaft rod;

[0008] A drive motor is located on one side of the main frame body, and the output end of the drive motor is connected to the upper shaft disc for transmission via a transmission belt;

[0009] A threaded shaft, concentrically fixed above the upper shaft disc, is used for threaded connection of a self-locking nut.

[0010] A coarse grinding device, vertically mounted above the upper shaft disc, is capable of performing initial grinding on the upper surface of the self-locking nut's closing end; and

[0011] A continuous grinding component is disposed on one side of the coarse grinding device. The continuous grinding component is capable of performing a second grinding of the self-locking nut's closing end based on the previous grinding process of the coarse grinding device.

[0012] Furthermore, preferably, the coarse grinding apparatus includes:

[0013] External body;

[0014] A rotating shaft is rotatably mounted inside the outer casing;

[0015] An internal motor is fixed inside the outer casing, and the output end of the internal motor is fixed to the rotating shaft.

[0016] A grinding disc is rotatably disposed below the rotating shaft, and a drive shaft is vertically rotatably disposed on the rotating shaft, one end of which is fixed to the grinding disc.

[0017] Furthermore, preferably, the drive shaft and the rotating shaft are eccentrically arranged.

[0018] Furthermore, preferably, the continuous polishing assembly includes:

[0019] A sliding guide is vertically mounted above the upper shaft plate, and an adjustment seat is slidably provided on the sliding guide;

[0020] The mounting side member is fixed to the adjusting seat, and the cross-section of the mounting side member is set as an arc-shaped structure; and

[0021] The adjustable polishing device is a plurality of devices arranged in a row, and each of the adjustable polishing devices is mounted on the mounting side member.

[0022] Furthermore, as a preferred embodiment, the mounting side member and the upper shaft disk are arranged in concentric circles.

[0023] Furthermore, preferably, the adjustable polishing device includes:

[0024] The fixed bracket is rotatably mounted on the mounting side member;

[0025] An adjustable telescopic rod is connected between the fixed frame and the mounting side piece;

[0026] The main drive wheel is rotatably mounted in the middle of the fixed frame;

[0027] The side connectors are symmetrically hinged to both sides of the fixed frame, and a first telescopic guide rod is provided between the side connectors and the fixed frame.

[0028] An external frame, slidably and adjustablely mounted on each of the side connectors, has a mounting body rotatably mounted on each external frame, and a transmission wheel rotatably mounted on each mounting body; and

[0029] The second telescopic guide rod is connected between the external frame and the mounting body, and a grinding belt is provided between the transmission wheel and the main drive wheel.

[0030] Furthermore, as a preferred embodiment, the fixing frame is also symmetrically provided with elastic telescopic members, one end of which is in contact with the grinding belt through a pressure adjusting wheel.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] 1. The coarse grinding device and continuous grinding component mainly set in this invention can perform rough grinding and fine grinding, thereby improving grinding accuracy and facilitating the removal of surface burrs;

[0033] 2. The coarse grinding device in this invention can perform feed grinding through the grinding disc under the rotation of the rotating shaft, so that it can intermittently contact the self-locking nut end during grinding, making the upper end surface of the end a continuous grinding surface. On the one hand, it can remove the grinding burrs in time, and on the other hand, it can effectively control the coarse grinding feed amount to avoid over-grinding. At the same time, the continuous grinding component is also provided, which can perform precision grinding work with different angles and grinding amounts by the combination adjustment of various adjustable grinding devices, so that the residual burrs on the edge of the self-locking nut end can be completely removed. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the coarse grinding device in this invention;

[0036] Figure 3 This is a schematic diagram of the continuous polishing assembly in this invention;

[0037] Figure 4 This is a schematic diagram of the adjustable polishing device in this invention;

[0038] Figure 5 This refers to the secondary grinding process for closing the self-locking nut in this invention;

[0039] In the diagram: 1. Main frame; 11. Mounting shaft seat; 12. Upper shaft plate; 13. Drive motor; 14. Inner shaft; 2. Rough grinding device; 21. Outer body; 22. Rotating shaft; 23. Built-in motor; 24. Grinding disc; 25. Drive shaft; 3. Continuous grinding assembly; 31. Sliding guide frame; 32. Adjusting seat; 33. Mounting side piece; 4. Adjustable grinding device; 41. Fixed frame; 42. Main drive wheel; 43. Adjustable telescopic rod; 44. Side connecting piece; 45. First telescopic guide rod; 46. External frame; 47. Second telescopic guide rod; 48. Transmission wheel; 49. Elastic telescopic component. Detailed Implementation

[0040] Please see Figure 1 In this embodiment of the invention, a grinding device for the closing of aerospace self-locking nuts includes:

[0041] Frame body 1;

[0042] Mounting bearing 11 is fixed to one side of the frame body 1, and an inner shaft 14 is rotatably provided inside the mounting bearing 11.

[0043] The upper shaft disc 12 is fixed on the inner shaft rod 14;

[0044] A drive motor 13 is disposed on one side of the frame body 1, and the output end of the drive motor 13 is connected to the upper shaft disk 12 for transmission via a transmission belt;

[0045] The threaded shaft is fixed above the upper shaft disc 12 with the same center, and is used for the threaded connection of the self-locking nut; thereby realizing the fixation of the self-locking nut;

[0046] The coarse grinding device 2 is vertically mounted above the upper shaft disk 12, and is capable of performing initial grinding on the upper end face of the self-locking nut.

[0047] The continuous grinding component 3 is disposed on one side of the coarse grinding device 2. The continuous grinding component 3 can perform secondary grinding on the self-locking nut's closing end based on the previous grinding process of the coarse grinding device 2. That is, the self-locking nut is first subjected to preliminary grinding on the upper end surface of the closing end by the coarse grinding device under low speed rotation, with a grinding accuracy in the range of 0.1mm-0.5mm, and the continuous grinding component follows up with subsequent grinding, with a grinding accuracy in the range of 0.04mm-0.08mm.

[0048] In this embodiment, the coarse grinding device 2 includes:

[0049] External body 21;

[0050] The rotating shaft 22 is rotatably disposed within the outer body 21;

[0051] The built-in motor 23 is fixed inside the outer body 21, and the output end of the built-in motor 23 is fixed to the rotating shaft 22;

[0052] The grinding disc 24 is rotatably disposed below the rotating shaft 22. A drive shaft 25 is vertically rotatably disposed on the rotating shaft 22. One end of the drive shaft 25 is fixed to the grinding disc 24. The grinding disc is mainly driven to rotate at high speed by the drive shaft and comes into contact with the self-locking nut to achieve the grinding work.

[0053] In a preferred embodiment, the drive shaft 25 and the rotating shaft 22 are eccentrically arranged. In particular, under the continuous rotation of the rotating shaft, the grinding disc can perform continuous feeding grinding work. On the one hand, it can discharge the abrasive in time, and on the other hand, it can ensure the overall grinding effect and avoid intermittent slippage.

[0054] In this embodiment, the continuous polishing component 3 includes:

[0055] A sliding guide 31 is vertically mounted above the upper shaft disk 12, and an adjustment seat 32 is slidably provided on the sliding guide 31.

[0056] Mounting side member 33 is fixed to the adjusting seat 32, and the cross-section of the mounting side member 33 is set as an arc-shaped structure; and

[0057] There are multiple adjustable polishing devices 4 arranged in a row, and each of the adjustable polishing devices 4 is mounted on the mounting side member 33.

[0058] In this embodiment, the mounting side piece 33 and the upper shaft plate 12 are arranged in concentric circles. That is to say, the adjustable grinding device located on the mounting side piece can perform grinding work when the self-locking nut rotates at low speed.

[0059] In this embodiment, the adjustable polishing device 4 includes:

[0060] The fixing bracket 41 is rotatably mounted on the mounting side member 33;

[0061] The telescopic rod 43 is adjusted and connected between the fixed frame 41 and the mounting side piece 33;

[0062] The main drive wheel 42 is rotatably disposed in the middle of the fixed frame 41;

[0063] Side connectors 44 are symmetrically hinged to both sides of the fixed frame 41, and a first telescopic guide rod 45 is provided between the side connectors 44 and the fixed frame 41.

[0064] An external frame 46 is slidably and adjustablely mounted on each of the side connectors 44. Each external frame 46 has a mounting body rotatably mounted on it, and each mounting body has a transmission wheel 48 rotatably mounted on it.

[0065] The second telescopic guide rod 47 is connected between the external frame 46 and the mounting body. A grinding belt is provided between the transmission wheel 48 and the main drive wheel 42. The mounting angle of the fixed frame can be adjusted by adjusting the telescopic action of the telescopic rod. The first telescopic guide rod and the second telescopic guide rod can effectively adjust the positioning and mounting point of the mounting body, thereby changing the grinding angle of the grinding belt.

[0066] In a preferred embodiment, the fixing frame 41 is also symmetrically provided with elastic telescopic members 49. One end of the elastic telescopic member 49 is in contact with the grinding belt through the pressure adjusting wheel so that the grinding belt body is always taut through the pressure adjusting wheel.

[0067] Specifically, in the grinding process of self-locking nuts, the self-locking nut is threaded onto a threaded shaft and driven to rotate at a low speed by an upper shaft disc. Under the continuous rotation of the rotating shaft, the grinding disc can perform continuous feed grinding, achieving a rough grinding effect on the upper surface of the self-locking nut. Furthermore, the adjustable grinding device located on the mounting side is adjusted by extending and retracting the telescopic rod, in conjunction with the first and second telescopic guide rods, to adjust the grinding angle of the grinding belt. At this time (e.g.) Figure 5 As shown, the grinding belt at the first position grinds radially and rotates clockwise; the grinding belt at the second position grinds axially and rotates counterclockwise, causing burrs at the closing edge of the self-locking nut to accumulate there; the grinding belt at the third position grinds at a 20° angle and rotates counterclockwise; and the grinding belt at the fourth position grinds at a 20° angle and rotates counterclockwise, thus completely removing burrs at the closing edge and achieving a smooth and complete grinding surface. The self-locking nut only needs to rotate 1-3 cycles, resulting in high grinding precision.

[0068] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A grinding device for the closing of aerospace self-locking nuts, characterized in that: It includes: Frame body (1); Mounting bearing (11) is fixed to one side of the frame body (1), and an inner shaft (14) is provided in the mounting bearing (11) for relative rotation. The upper shaft disc (12) is fixed on the inner shaft rod (14); A drive motor (13) is located on one side of the frame body (1), and the output end of the drive motor (13) is connected to the upper shaft disk (12) for transmission via a transmission belt; A threaded shaft is fixed above the upper shaft disc (12) with the same center, and is used for threaded connection of a self-locking nut. The coarse grinding device (2) is vertically mounted above the upper shaft disk (12). The coarse grinding device (2) can perform initial grinding on the upper end face of the self-locking nut. A continuous grinding component (3) is provided on one side of the coarse grinding device (2). The continuous grinding component (3) can perform secondary grinding on the self-locking nut closing based on the previous grinding process of the coarse grinding device (2). The continuous polishing assembly (3) includes: A sliding guide (31) is vertically mounted above the upper shaft disk (12), and an adjustment seat (32) is provided on the sliding guide (31) that can slide relative to it. Mounting side member (33) is fixed on the adjusting seat (32), and the cross-section of the mounting side member (33) is set as an arc structure; The adjustable polishing device (4) is arranged in multiple ways, and each of the adjustable polishing devices (4) is mounted on the mounting side member (33); The adjustable polishing device (4) includes: The fixing bracket (41) is rotatably mounted on the mounting side member (33); An adjustable telescopic rod (43) is connected between the fixed frame (41) and the mounting side piece (33); The main drive wheel (42) is rotatably disposed in the middle of the fixed frame (41); Side connectors (44) are symmetrically hinged to both sides of the fixed frame (41), and a first telescopic guide rod (45) is provided between the side connectors (44) and the fixed frame (41); An external frame (46) is slidably and adjustablely mounted on each of the side connectors (44). Each external frame (46) is rotatably mounted with a mounting body, and each mounting body is rotatably mounted with a transmission wheel (48). The second telescopic guide rod (47) is connected between the outer frame (46) and the mounting body, and a grinding belt is provided between the transmission wheel (48) and the main drive wheel (42).

2. The aerospace self-locking nut end-grinding device according to claim 1, characterized in that: The coarse grinding device (2) includes: External body (21); The rotating shaft (22) is rotatably disposed within the outer body (21); An internal motor (23) is fixed inside the external body (21), and the output end of the internal motor (23) is fixed to the rotating shaft (22); The grinding disc (24) is rotatably disposed below the rotating shaft (22), and a drive shaft (25) is vertically rotatably disposed on the rotating shaft (22), one end of the drive shaft (25) being fixed to the grinding disc (24).

3. The aerospace self-locking nut end-grinding device according to claim 2, characterized in that: The drive shaft (25) is eccentrically positioned relative to the rotating shaft (22).

4. The aerospace self-locking nut end-grinding device according to claim 1, characterized in that: The mounting side piece (33) and the upper shaft plate (12) are arranged in concentric circles.

5. The aerospace self-locking nut end-grinding device according to claim 1, characterized in that: The fixed frame (41) is also symmetrically provided with elastic telescopic members (49), one end of which is in contact with the grinding belt through a pressure adjusting wheel.

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