Aircraft nut press mechanism

Abstract

The utility model belongs to aviation nut pressure point field especially aviation nut pressure point mechanism, aiming at the low precision, poor consistency, complex operation, low efficiency, insufficient rigidity of equipment, easy to damage, poor universality problem of existing pressure point, present and propose following scheme, it includes: base, fixed base is located at the top one side of base, oil cylinder seat is rotatably installed at the top of fixed base, support seat is located at the top of base, lever mechanism is located at the top of oil cylinder seat, pressure point structure is located on support seat, the lever mechanism includes the oil cylinder that sets up at the top of oil cylinder seat, and the output shaft of oil cylinder is provided with lifting shaft, the top of lifting shaft is provided with upper lever arm, the utility model discloses a novel lever-elasticity collaborative structure, realizes the "high precision, high efficiency, high reliability, high general" aviation nut pressure point processing, satisfies the precision manufacturing demand of aerospace equipment, has remarkable technical and economic value.

Description

Technical Field

[0001] This utility model relates to the field of aviation nut pressing point technology, and in particular to aviation nut pressing point mechanism. Background Technology

[0002] Aviation nuts are core fasteners in aerospace equipment connection systems, and their structural precision and connection reliability directly affect the flight safety of the equipment. To improve the anti-loosening performance of aviation nuts and bolts, it is necessary to perform pressure point processing on the side wall of the nut (forming concave points through local plastic deformation to increase the friction of the threaded fit). This process has extremely high requirements for the positional accuracy of the pressure points, pressure control, and forming consistency.

[0003] Existing aviation nut pressing equipment has the following technical defects:

[0004] 1. Low pressure point accuracy and poor consistency.

[0005] Traditional pressing devices mostly use cylinders to directly drive the pressing blocks. The cylinder thrust fluctuates greatly (±5%) and lacks lever arm amplification and precise guiding structure, resulting in pressing depth and position deviations exceeding 0.1mm, which cannot meet aviation standards (pressing deviation must be ≤0.05mm). At the same time, manual positioning nuts are prone to eccentricity, causing asymmetry in the pressing points and affecting the anti-loosening effect.

[0006] 2. Complex operation and low efficiency

[0007] The existing equipment requires manual clamping and positioning of nuts, with each pressing point taking ≥30 seconds, and the pressing block needs to be manually reset after pressing. It cannot meet the mass production requirements of aerospace parts (the daily pressing point quantity needs to be ≥500 pieces).

[0008] 3. The equipment lacks rigidity and is easily damaged.

[0009] During the pressing process, the impact force acts directly on the drive element (cylinder / hydraulic cylinder). The lack of a buffer structure leads to rapid wear of the drive element, resulting in a mean time between failures (MTBF) of less than 500 hours and high maintenance costs.

[0010] 4. Poor versatility

[0011] Traditional equipment is designed for single-specification nuts. When changing to different models (such as M6 and M8 aviation nuts), a complete set of pressure blocks and positioning fixtures must be replaced. The fixture replacement takes more than 1 hour, which cannot adapt to the flexible production of multiple specifications of aviation nuts.

[0012] Therefore, we propose an aviation nut pressing mechanism to solve the above problems. Utility Model Content

[0013] The purpose of this utility model is to solve the shortcomings of existing technologies, such as low pressing accuracy, poor consistency, complex operation, low efficiency, insufficient equipment rigidity, easy damage, and poor versatility, and proposes an aviation nut pressing mechanism.

[0014] To achieve the above objectives, the present invention adopts the following technical solution:

[0015] The aircraft nut pressing mechanism includes:

[0016] Base;

[0017] A mounting base is located on one side of the top of the base;

[0018] The cylinder seat is rotatably mounted on top of the fixed seat;

[0019] A support base is located on top of the base;

[0020] The lever mechanism is located on top of the cylinder seat;

[0021] The pressure point structure is set on the support base.

[0022] Preferably, the lever mechanism includes a hydraulic cylinder disposed on the top of the hydraulic cylinder seat, and a lifting shaft is provided on the output shaft of the hydraulic cylinder.

[0023] Preferably, an upper lever arm is installed at the top of the lifting shaft, and a connecting shaft is rotatably installed at one end of the upper lever arm, with a lower lever arm connected to the bottom end of the connecting shaft.

[0024] Preferably, both the upper lever arm and the lower lever arm are rotatably mounted on the support base.

[0025] Preferably, the pressure point structure includes two movable seats slidably mounted on the support base, and the two movable seats are arranged opposite to each other. Each of the two movable seats is provided with a pressure point block, and the two pressure point blocks are arranged opposite to each other.

[0026] Preferably, the same spring is provided on the side of the two movable seats that are close to each other; and the two pressure points are provided on the side that are far apart from each other, with the two abutting blocks contacting the upper lever arm and the lower lever arm respectively.

[0027] The beneficial effects of the aviation nut pressing point mechanism in this utility model are as follows:

[0028] (I) Significantly improved pressure point accuracy and consistency

[0029] 1. The lever mechanism enables precise force control and position guidance.

[0030] By utilizing the lever principle of "upper lever arm + lower lever arm", the thrust of the hydraulic cylinder is amplified. At the same time, the movement trajectory of the lever is restricted by the rotation fulcrum of the support seat, so that the movement accuracy of the pressure point block is controlled within 0.03mm. With the symmetrically arranged pressure point blocks, the pressure points on both sides of the nut can be pressed synchronously, with a pressure point position deviation of ≤0.05mm, which fully meets the requirements of aviation standards.

[0031] 2. Symmetrical pressure points eliminate eccentricity error

[0032] The two pressure point blocks are pre-tightened by springs and arranged symmetrically. When the nut is placed between the pressure point blocks, it can be automatically centered, avoiding the eccentricity problem of manual positioning. During the pressure point process, the two pressure point blocks approach each other synchronously, so that the nut is subjected to uniform force and the consistency of pressure point formation is improved.

[0033] (ii) Operational efficiency and equipment reliability have been greatly improved.

[0034] 1. Automated pressure point + elastic reset

[0035] The equipment only requires placing the nut between the pressure blocks and starting the hydraulic cylinder to complete the pressure point: the hydraulic cylinder drives the lever to rotate → the pressure blocks press synchronously → after pressing, the spring automatically resets the pressure blocks. The time for a single pressure point is ≤10 seconds, which is more efficient than traditional equipment and suitable for mass production.

[0036] 2. Lever cushioning reduces equipment wear.

[0037] The lever mechanism distributes the impact force at the pressure point to the support seat and lever arm, preventing the impact force from acting directly on the hydraulic cylinder. At the same time, the spring can buffer the impact force at the end of the pressure point.

[0038] (III) Enhanced versatility and flexible production capabilities

[0039] 1. Compatible with multiple nut sizes, making tooling changes convenient.

[0040] The pressure point block adopts a detachable structure. When changing to different specifications of aviation nuts, only the corresponding pressure point block needs to be replaced. There is no need to adjust the lever and cylinder structure, thus achieving flexible pressure points for nuts of various specifications.

[0041] (iv) Improved operational safety and stability

[0042] 1. Closed-loop pressure point process to avoid misoperation.

[0043] After the nut is inserted, the linkage structure between the lever and the pressure block can automatically limit the displacement of the nut, eliminating the risk of parts splashing during the pressure process. At the same time, the stroke of the hydraulic cylinder is controllable (the stroke of the lifting shaft is precisely controlled by a solenoid valve), avoiding excessive pressure that could damage the nut and improving the product qualification rate.

[0044] This utility model achieves "high precision, high efficiency, high reliability, and high versatility" machining of aerospace nut pressure points through an innovative lever-elastic synergistic structure, meeting the precision manufacturing needs of aerospace equipment and possessing significant technical and economic value. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the aviation nut pressing point mechanism proposed in this utility model.

[0046] In the diagram: 1. Base; 2. Fixed seat; 3. Cylinder seat; 4. Support seat; 5. Cylinder; 6. Lifting shaft; 7. Upper lever arm; 8. Connecting shaft; 9. Lower lever arm; 10. Moving seat; 11. Pressing block; 12. Spring; 13. Abutting block. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0048] Example

[0049] Reference Figure 1 Aviation nut pressing mechanism, including:

[0050] Base 1;

[0051] The fixing base 2 is located on one side of the top of the base 1;

[0052] The cylinder seat 3 is rotatably mounted on the top of the fixed seat 2;

[0053] Support base 4 is located on top of base 1;

[0054] The lever mechanism is located on the top of the cylinder seat 3;

[0055] The pressure point structure is set on the support base 4.

[0056] In this embodiment, the lever mechanism includes a cylinder 5 disposed on the top of the cylinder seat 3, and a lifting shaft 6 is disposed on the output shaft of the cylinder 5.

[0057] In this embodiment, an upper lever arm 7 is installed on the top of the lifting shaft 6, and a connecting shaft 8 is rotatably installed on one end of the upper lever arm, and a lower lever arm 9 is connected to the bottom end of the connecting shaft 8.

[0058] In this embodiment, both the upper lever arm 7 and the lower lever arm 9 are rotatably mounted on the support base 4.

[0059] In this embodiment, the pressure point structure includes two movable seats 10 that are slidably mounted on the support base 4, and the two movable seats 10 are arranged opposite to each other. Each of the two movable seats 10 is provided with a pressure point block 11, and the two pressure point blocks 11 are arranged opposite to each other.

[0060] In this embodiment, the same spring 12 is provided on the side of the two movable seats 10 that are close to each other; and the two pressure blocks 11 are provided on the side that are far apart from each other, and the two abutting blocks 13 are in contact with the upper lever arm 7 and the lower lever arm 9 respectively.

[0061] In this embodiment, during use, the aviation nut is placed between the two pressure point blocks 11, the hydraulic cylinder 5 is activated, and the lifting shaft 6 is pulled up and down, thereby driving the upper lever arm 7 to rotate. The upper lever arm 7 drives the lower lever arm 9 to rotate through the connecting shaft 8. The rotation of the upper lever arm 7 and the lower lever arm 9 is based on the lever principle. When the upper lever arm 7, the lower lever arm 9 and the support seat 4 rotate, they press against the contact block 13 to move, thereby driving the two pressure point blocks 11 to move closer to each other and press the aviation nut. At the same time, the spring 12 is compressed. After the pressing is completed, the spring 12 returns to its original position, driving the pressure point blocks 11 to return to their original position.

[0062] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An aviation nut pressing point mechanism, characterized in that, include: Base (1); A fixing seat (2) is provided on one side of the top of the base (1); The cylinder seat (3) is rotatably mounted on the top of the fixed seat (2); A support base (4) is provided on top of the base (1); A lever mechanism is located on top of the cylinder seat (3); The pressure point structure is set on the support base (4).

2. The aviation nut pressing mechanism according to claim 1, characterized in that, The lever mechanism includes a cylinder (5) disposed on the top of the cylinder seat (3), and a lifting shaft (6) is disposed on the output shaft of the cylinder (5).

3. The aviation nut pressing mechanism according to claim 2, characterized in that, The top of the lifting shaft (6) is equipped with an upper lever arm (7), and a connecting shaft (8) is rotatably installed at one end of the upper lever arm. The bottom end of the connecting shaft (8) is connected to a lower lever arm (9).

4. The aviation nut pressing mechanism according to claim 3, characterized in that, Both the upper lever arm (7) and the lower lever arm (9) are rotatably mounted on the support base (4).

5. The aviation nut pressing mechanism according to claim 4, characterized in that, The pressure point structure includes two movable seats (10) that are slidably mounted on the support base (4) and are arranged opposite to each other. Each of the two movable seats (10) is provided with a pressure point block (11) and the two pressure point blocks (11) are arranged opposite to each other.

6. The aviation nut pressing mechanism according to claim 5, characterized in that, The two movable seats (10) are provided with the same spring (12) on the side that is close to each other; and the two pressure blocks (11) are provided with abutting blocks (13) on the side that is far from each other, and the two abutting blocks (13) are in contact with the upper lever arm (7) and the lower lever arm (9) respectively.

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