Nut gasket anti-falling device

Abstract

The utility model discloses a nut gasket anti-drop device, which comprises a main body outer sleeve, a limiter assembly, a nut bearing outer spring and a nut bearing sheet, the upper part of the main body outer sleeve is provided with a limiting mechanism, the limiting mechanism is used for preventing a nut from being separated from the main body outer sleeve, and the main body outer sleeve can be connected with a wrench through a connecting mechanism arranged below the main body outer sleeve. The limiter assembly comprises a limiting kinematic pair, an ejector rod and a movable ball, one end of the ejector rod is sleeved with the limiting kinematic pair, the movable ball is located between the ejector rod and the limiting upper lining, and the limiting kinematic pair can be connected with the bolt in a clamped mode; the bolt can press the limiting kinematic pair downwards so that the ejector rod can move downwards at the same time and drive the movable ball to move to a limiting opening in the outer edge of the limiter lining, the situation that the bolt is too long and connected with a plurality of nuts at the same time is prevented, and the inconvenience caused by frequent nut supplementing due to insufficient nuts is reduced through the nut bearing piece. The ejector rod and the movable ball work cooperatively to ensure that the device can accurately control the installation sequence of the nuts in a narrow space.

Description

Technical Field

[0001] The utility model belongs to the technical field of aircraft assembly, and particularly relates to a nut gasket anti-dropping device. Background Art

[0002] At present, the aircraft manufacturing industry generally adopts manual installation to connect nuts and washers. Although this method is simple and direct, it has some obvious defects in actual operation. First, when operating in a narrow or invisible area, due to limited vision, it is difficult for workers to accurately judge the position of the nut washer, resulting in the nut washer falling off during the installation process. Secondly, when the bolt is long, it is possible to connect multiple nuts at the same time, which not only affects the installation quality, but also may cause looseness due to the nut not being fully tightened, posing a threat to flight safety. In addition, if the nut washer is not placed correctly during the installation process, it may also cause thread damage, further affecting the installation efficiency. In order to solve these problems, existing solutions often require additional time and labor costs to find and reinstall the nut washer. For example, in a small space, workers may need to use special tools or lighting equipment to find fallen nuts and washers, and in invisible areas, they may need to disassemble surrounding components for easy search. These methods are not only time-consuming and labor-intensive, but may not be feasible in some cases, causing the installation work to stagnate and seriously affecting the production progress. Therefore, there is an urgent need for a device that can effectively solve the problem of nuts and washers falling during installation in small or invisible areas, so as to improve work efficiency, reduce unnecessary costs, and ensure the safety and reliability of the aircraft. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a nut gasket anti-dropping device, which solves the problem that nut gaskets are easy to fall in narrow areas and invisible areas.

[0004] To solve the above problems, the technical solution adopted by the utility model is as follows: a nut gasket anti-falling device, comprising: a main body outer sleeve, a limiter assembly, a nut supporting outer spring and a nut supporting plate, a limit mechanism is provided on the upper part of the main body outer sleeve, the limit mechanism is used to prevent the nut from falling off the main body outer sleeve, the main body outer sleeve can be connected to the wrench through a connecting mechanism arranged below it, the limiter assembly comprises a limit motion pair, a push rod and a movable ball, one end of the push rod is sleeved in the limit motion pair, the movable ball is located between the push rod and the limit upper bushing, the limit motion pair can be clamped with a bolt, and the bolt can press down the limit motion pair so that the push rod moves downward at the same time and drives the movable ball to move to the limit opening on the outer edge of the limiter bushing to prevent the bolt from being too long and connecting multiple nuts at the same time.

[0005] Compared with the prior art, the beneficial effects of the present utility model are as follows: By providing a nut supporting piece inside the main body outer sleeve, the device can store more than 4 nuts at one time, reducing the inconvenience caused by frequently replenishing nuts due to insufficient nut quantity. The nut supporting outer spring lifts the nut supporting piece to ensure that the nuts inside the main body outer sleeve are always in the pre-installed position, enabling quick positioning of the nuts without manual intervention. The design of the limiter assembly can effectively prevent the bolt from connecting multiple nuts at the same time when it is too long, ensuring that only one nut is connected to the bolt each time, improving the installation accuracy and reliability. The collaborative work of the ejector rod and the moving ball enables precise control of the nut installation sequence even in a narrow space.

[0006] For the above anti-drop device, the limiting mechanism includes a gasket retaining ring and a limiting block. The limiting block is located below the gasket retaining ring. The upper part of the gasket retaining ring has a circular protrusion. The limiting block is used to prevent the nut from disengaging from the main body outer sleeve without external force.

[0007] For the above anti-drop device, the height of the protrusion is 0.2 mm to 0.5 mm.

[0008] For the above anti-drop device, the limiting block is a movable spring ball, and the number of the movable spring balls is multiple.

[0009] For the above anti-drop device, the limiter assembly further includes a reset inner spring. The limiting kinematic pair is sleeved outside the reset inner spring. The ejector rod has a supporting groove, and the moving ball is placed in the supporting groove.

[0010] For the above anti-drop device, the supporting groove is a conical groove.

[0011] For the above anti-drop device, the ejector rod has an inclined surface boss. When the bolt presses down the limiting kinematic pair to drive the ejector rod to move downward, the inclined surface boss can contact and squeeze the moving ball.

[0012] For the above anti-drop device, the connecting mechanism is an internal square interface rod, and the internal square interface rod can be connected to a 1 / 4 ratchet wrench.

[0013] For the above anti-drop device, the inside of the main body outer sleeve adopts a hexagonal structure.

[0014] For the above anti-drop device, the number of the moving balls is two.

[0015] The present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Description of the Drawings

[0016] Figure 1 Cross-sectional view of the overall structure of the anti-detachment device according to an embodiment of the present utility model;

[0017] Figure 2 Cross-sectional view of the limiter assembly structure of the anti-detachment device according to an embodiment of the present utility model;

[0018] Figure 3 Top view of the anti-detachment device according to an embodiment of the present utility model;

[0019] Figure 4 Bottom view of the anti-detachment device according to an embodiment of the present utility model;

[0020] Explanation of the reference numerals in the drawings: 12 gasket retaining ring, 14 limit stop block, 16 limit moving pair, 18 reset inner spring, 19 limiter assembly, 20 nut support piece, 22 reset inner spring base, 24 nut support outer spring, 26 upper limit bushing, 36 lower limit bushing, 28 moving ball, 30 support groove, 32 ejector rod, 34 main body outer sleeve, 38 connecting mechanism. Detailed implementation manners

[0021] The following details the embodiments of the present utility model. Referring to Figures 1 to 4 , the embodiments of the present utility model provide a nut gasket anti-falling device, which includes a main body outer sleeve 34, a limiter assembly 19, a nut support outer spring 24 and a nut support piece 20. A limiting mechanism is provided at the upper part of the main body outer sleeve 34, and the limiting mechanism is used to prevent the nut from detaching from the main body outer sleeve 34. The main body outer sleeve 34 can be connected to a wrench through a connecting mechanism 38 provided below it. The limiter assembly 19 includes a limit moving pair 16, an ejector rod 32 and a moving ball 28. One end of the ejector rod 32 is sleeved in the limit moving pair 16, and the moving ball 28 is located between the ejector rod 32 and the upper limit bushing 26. The limit moving pair 16 can be clamped with the bolt, and the bolt can press down the limit moving pair 16 so that the ejector rod 32 moves downward at the same time and drives the moving ball 28 to move to the limit opening at the outer edge of the limiter bushing, so as to prevent the bolt from being too long and connecting multiple nuts at the same time. By arranging the nut support piece 20 inside the main body outer sleeve 34, the device can store more than 4 nuts at one time, reducing the inconvenience caused by frequently replenishing nuts due to insufficient nut quantity. The nut support outer spring 24 supports the nut support piece 20 to ensure that the nuts inside the main body outer sleeve 34 are always in the pre-installed position, and the positioning of the nuts can be quickly completed without manual intervention. The design of the limiter assembly 19 can effectively prevent the bolt from being too long and connecting multiple nuts at the same time, ensuring that only one nut is connected to the bolt each time, improving the installation accuracy and reliability. The coordinated work of the ejector rod 32 and the moving ball 28 enables accurate control of the nut installation sequence even in a narrow space.

[0022] Further, referring to Figure 1, the limiting mechanism includes a gasket retaining ring 12 and a limiting block 14. The limiting block 14 is located below the gasket retaining ring 12. The upper part of the gasket retaining ring 12 has a ring of protrusions. The limiting block 14 is used to prevent the nut from detaching from the main body outer sleeve 34 when no external force is applied. Both the gasket retaining ring 12 and the limiting block 14 are used to prevent the nut from detaching from the main body outer sleeve 34 when the limiter assembly 19 is not subject to external force. Of course, the present invention does not limit the specific height of the protrusions on the gasket retaining ring 12. Preferably, the height of the protrusions is 0.2 mm to 0.5 mm. Of course, the present invention does not limit the specific structure of the limiting block 14. Preferably, the limiting block 14 is a movable spring ball. Of course, the present invention does not limit the specific position and number of the movable spring balls. Preferably, the number of the movable spring balls is two, and the two movable spring balls are embedded in the inner wall of the main body outer sleeve 34. Further, referring to Figure 2The limiter assembly 19 also includes a return inner spring 18, and the limit motion pair 16 is sleeved on the outside of the return inner spring 18. The push rod 32 has a supporting groove 30, and the moving ball 28 is placed in the supporting groove 30. Of course, the utility model does not limit the specific structure of the supporting groove 30. Preferably, the supporting groove 30 is a conical groove. Further, the push rod 32 has an inclined boss. When the bolt presses the limit motion pair 16 to drive the push rod 32 to move downward, the inclined boss can contact and squeeze the moving ball 28. The design purpose of the limiter assembly 19 is to prevent the bolt from being too long and causing multiple nuts to be connected at the same time. This design helps to ensure that each nut can be installed correctly and avoid installation errors caused by excessive bolt length. When the limiter assembly 19 does not receive external pressure, the push rod 32 is in the initial position, the moving ball 28 is located at the center of the limiter bushing, the connector is connected to a 1 / 4 ratchet wrench or other driving tools, and multiple nuts are placed in the main outer sleeve 34 in sequence. The limiting motion pair 16 passes through the center hole of the nut, and the nut is supported by the nut support plate 20 and the nut support outer spring 24. As the nut is continuously inserted, the nut support outer spring 24 is compressed, so that the internal space of the main outer sleeve 34 is released; when the nut inside the main outer sleeve 34 is docked with the bolt on the aircraft, the bolt passes through the first nut and moves inward until it contacts the limiting motion pair 16. At this time, the pressure will cause the push rod 32 to move into the main outer sleeve 34, and the inclined protrusion on the push rod 32 squeezes the moving ball 28, so that the moving ball 28 moves to the limiting opening on the limiting upper bushing 26, forming a limiting block in sequence, and the moving ball 28 fits with the inner thread of the second nut inside the main outer sleeve 34 to form a whole. Continue to tighten the bolt, the downward pressure causes the push rod 32 to continue to move downward, and at the same time drives the second nut to move downward to prevent the bolt from being too long and connecting multiple nuts at the same time. After the nut is connected in place, the reverse force pulls the main body outer sleeve 34, and the external pulling force of the nut reaches the elastic force of the spring of the limit stop block 14, so that the limit stop block 14 is reset and the blocking function is re-formed. After the bolt disengages from the limit motion pair 16, the reset inner spring 18 releases the pressure to reset the push rod 32, and the remaining nuts inside the main body outer sleeve 34 are pushed to the pre-installed position by the nut supporting outer spring 24 by the nut supporting plate 20, and at the same time, an inward pressure is applied to the moving ball 28 to make it return to the inside of the limit upper bushing 26, so as to release the limiting relationship formed by the moving ball 28 and the limiting mouth, and prepare for the second bolt and nut docking.

[0023] Furthermore, the present invention does not limit the specific structure of the connecting mechanism 38. Figure 4, the connecting mechanism 38 is an internal square interface rod, and the internal square interface rod can be connected to a 1 / 4 ratchet wrench. Further, the present utility model does not limit the specific number of the moving balls 28. Preferably, the number of the moving balls 28 is two. Further, the present utility model does not limit the specific structure of the limiting upper bushing 26. Preferably, a limiting lower bushing 36 is provided below the limiting upper bushing 26. The upper part of the limiting upper bushing 26 is connected to the reset inner spring base 22, and the limiting lower bushing 36 is connected to the supporting groove 30 of the moving ball 28. Further, referring to Figure 3 , the interior of the main body outer sleeve 34 adopts a hexagonal structure to facilitate the fixing of the nut.

[0024] It should be noted that in the description of the present utility model, if there is any reference to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., it is all based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation to the present utility model.

[0025] In the description of the present utility model, the meaning of "several" is one or more, and the meaning of "multiple" is two or more. Understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" or "second", etc., it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0026] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present utility model in combination with the specific content of the technical solution.

[0027] The above embodiments are only the preferred embodiments of the present utility model and cannot be used to limit the scope of protection of the present utility model. Any non-substantive changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. A nut and washer anti-drop device, characterized in that: include: A main body outer sleeve (34), a stopper assembly (19), a nut supporting outer spring (24) and a nut supporting plate (20); a stopper mechanism is provided on the upper part of the main body outer sleeve (34), and the stopper mechanism is used to prevent the nut from escaping from the main body outer sleeve (34); the main body outer sleeve (34) can be connected to a wrench through a connecting mechanism (38) provided below the main body outer sleeve; the stopper assembly (19) comprises a stopper kinematic pair (16), a push rod (32) and a movable ball (28); One end of the push rod (32) is sleeved in the limit motion pair (16), and the moving ball (28) is located between the push rod (32) and the limit upper bushing (26). The limit motion pair (16) can be clamped with a bolt, and the bolt can press down the limit motion pair (16) to make the push rod (32) move downward at the same time and drive the moving ball (28) to move to the limit opening on the outer edge of the limit bushing, so as to prevent the bolt from being too long and connecting multiple nuts at the same time.

2. The anti-fall device according to claim 1, characterized in that: The limiting mechanism comprises a gasket retaining ring (12) and a limiting block (14); the limiting block (14) is located at the lower part of the gasket retaining ring (12); the upper part of the gasket retaining ring (12) has a circle of protrusions; the limiting block (14) is used to prevent the nut from being separated from the main body outer sleeve (34) in the absence of external force.

3. The anti-drop device according to claim 2, characterized in that: The height of the protrusion is 0.2 mm to 0.5 mm.

4. The anti-fall device according to claim 2, characterized in that: The limit stopper (14) is a movable spring ball, and there are multiple movable spring balls.

5. The anti-fall device according to claim 1, characterized in that: The limiter assembly (19) also includes a return inner spring (18), the limit motion pair (16) is sleeved on the outside of the return inner spring (18), the push rod (32) has a supporting groove (30), and the moving ball (28) is placed in the supporting groove (30).

6. The anti-fall device according to claim 5, characterized in that: The supporting groove (30) is a tapered groove.

7. The anti-fall device according to claim 1, characterized in that: The push rod (32) is provided with an inclined boss. When the bolt presses down the limiting motion pair (16) to drive the push rod (32) to move downward, the inclined boss can contact and squeeze the moving ball (28).

8. The anti-fall device according to claim 1, characterized in that: The connecting mechanism (38) is an inner square interface rod, and the inner square interface rod can be connected to a 1 / 4 ratchet wrench.

9. The anti-fall device according to claim 1, characterized in that: The interior of the main body outer sleeve (34) adopts a hexagonal structure.

10. The anti-fall device according to claim 1, characterized in that: The number of the movable balls (28) is two.

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