CN220186191U - Aircraft joint plugging device - Google Patents

Abstract

The utility model belongs to the technical field of joint plugging, and particularly relates to an aircraft joint plugging device which comprises an outer ring, an inner ring, adjusting screws and balls. The utility model utilizes the structure mainly composed of the outer ring, the inner ring, the ball and the adjusting screw, and the relative deflection angle of the outer ring and the inner ring is adjusted by rotating, so that the relative positions of the convex spines arranged on the outer ring and the limiting holes arranged on the inner ring are changed, and then the difference of the profile heights of the convex spines is utilized to change the size of the diameter of the corresponding working surface of the ball, thereby changing the holding force of the ball on the outer wall of the aircraft joint, realizing the quick disassembly of the plugging device, and being applicable to the joint with or without screw thread design.

Description

Aircraft joint plugging device

Technical Field

The utility model belongs to the technical field of joint plugging, and particularly relates to an aircraft joint plugging device.

Background

In the course of aircraft manufacturing, pressure testing of the assembled piping and fittings is required to check whether the strength and tightness of the installed piping system meets design requirements. Furthermore, aircraft ducts often damage the duct ports during manufacturing, shipping, and assembly, and excess material may enter the duct. To solve the above problems, the aircraft joint needs to be plugged.

"patent (application) number: the Chinese patent of CN 202021399981.9' discloses a sealing plug, wherein the plug is in threaded connection with a joint to be sealed and plugged, and the tightness is ensured by an O-shaped sealing ring arranged on the end face of the plug. The sealing plug of the threaded connection can be used for sealing an aircraft joint, but is mainly suitable for joints with matched internal thread designs, and if the joint to be plugged is a smooth wall joint without internal threads, the plugging effect of the sealing plug is not ideal. If the structure is properly adjusted so that the sealing plug disclosed in the prior art has internal threads, the joint with the sealing plug is required to have matched external threads, and the problem of limited applicability still exists.

Disclosure of Invention

The utility model provides an aircraft joint plugging device, which aims at the defect of limited applicability of a threaded connection type sealing plug in the prior art, and utilizes a structure mainly composed of an outer ring, an inner ring, balls and adjusting screws, the relative deflection angle of the outer ring and the inner ring is adjusted through rotation, so that the relative positions of a convex ratchet arranged on the outer ring and a limiting hole arranged on the inner ring are changed, and then the difference of the profile heights of the convex ratchet is utilized to change the diameter of a working surface corresponding to the balls, thereby changing the holding force of the balls on the outer wall of the aircraft joint, realizing quick disassembly and assembly of the plugging device, and being applicable to joints with or without threaded design.

The utility model provides an aircraft joint plugging device, which comprises an outer ring, an inner ring, adjusting screws and balls, wherein the inner ring is provided with a sealing bottom for sealing the end face of an aircraft joint; the outer ring is provided with a convex ratchet with a molded surface protruding from the inner wall surface of the outer ring; the inner ring is provided with a limiting hole penetrating through the inner wall surface and the outer wall surface of the inner ring, and an opening of the limiting hole close to the inner wall surface of the inner ring limits the ball to pass through; after the outer ring is sleeved with the inner ring, the convex spines and the limiting holes form a working space for movably mounting the balls together; the outer ring and the inner ring which movably clamp the ball are connected into a whole through the adjusting screw;

when the adjusting screw is not locked, the outer ring and the inner ring can relatively rotate along the central shaft of the plugging device, the position of the convex ratchet opposite to the limiting hole is changed along with the position, and the difference of the protrusion heights of the molded surface of the convex ratchet relative to the inner wall surface of the outer ring is utilized to ensure that the heights of the balls protruding from the inner wall surface of the inner ring in the limiting hole are different, namely the diameters d of the working surfaces corresponding to the balls are different;

when the adjusting screw is locked, the outer ring and the inner ring are locked and can not rotate relatively.

According to the aircraft joint plugging device, the enclasping force application unit formed by the convex spines, the limiting holes and the balls is utilized to apply and withdraw enclasping force of the aircraft joint; and then the relative rotation angle of the outer ring and the inner ring is adjusted and limited by the adjusting screw.

Further, in order to better realize the utility model, the convex ratchet is arranged according to the protruding height of the molded surface relative to the inner wall surface of the outer ring from top to bottom, and the molded surface of the convex ratchet comprises peaks, slopes and valleys;

the balls are in contact with the slope parts of the convex ratchet profiles, the diameter d of the working surface corresponding to the balls is smaller as the balls are closer to the peak parts, and the diameter d of the working surface corresponding to the balls is larger as the balls are closer to the valley parts; the ball is contacted with the peak part of the convex ratchet surface, and the diameter d of the working surface corresponding to the ball is minimum; the balls are in contact with the valley portions of the convex ratchet molded surfaces, and the diameter d of the working surface corresponding to the balls is largest.

Further, in order to better realize the utility model, when the ball is positioned at the valley of the convex ratchet, the ball can be separated from the limit of the limit hole, and the outer ring and the inner ring can be detached or installed at the moment; when the balls are positioned on the slope or peak of the convex spines, the outer ring and the inner ring cannot be detached or installed.

Further, in order to better realize the utility model, the limiting hole is a cylindrical through hole; one end of the limiting hole, which is close to the outer wall surface of the inner ring, is not rounded and is not chamfered.

Further, in order to better realize the utility model, the limiting hole is a cylindrical through hole; and one end of the limiting hole, which is close to the outer wall surface of the inner ring, is provided with a rounding or chamfering for removing processing burrs.

Further, in order to better realize the utility model, the limiting hole is a cylindrical through hole; and one end of the limiting hole, which is close to the outer wall surface of the inner ring, is provided with a guide surface capable of guiding the balls. The caliber of one end of the guide surface, which is close to the inner wall surface of the outer ring, is larger, and the caliber of one end of the guide surface, which is far away from the inner wall surface of the outer ring, is smaller.

Still further, the guide surface is a conical surface or a sphere-like surface.

Further, in order to better realize the utility model, the outer ring is provided with a connecting lug, and the connecting lug is provided with a screw mounting hole; the outer wall of the inner ring is provided with a waist-shaped groove; the limiting end part of the adjusting screw penetrates through the screw mounting hole and then stretches into the waist-shaped groove; when the limiting end of the adjusting screw is not fastened in the waist-shaped groove, the outer ring and the inner ring relatively rotate and drive the limiting end of the adjusting screw to move in the waist-shaped groove; when the limiting end of the adjusting screw is fastened in the waist-shaped groove, the outer ring and the inner ring are locked and can not rotate relatively.

Further, in order to better realize the utility model, the limiting end of the adjusting screw is arranged in the waist-shaped groove in a limiting way, so that the angle of relative rotation between the outer ring and the inner ring is limited, and the balls cannot be separated from the space between the outer ring and the inner ring.

Further, in order to better realize the utility model, a spring and a ball are arranged in the stud of the adjusting screw, and the free end of the spring is connected with the ball arranged at the limit end.

Further, in order to better realize the utility model, the sealing ring is also included; the inner wall of the outer ring is provided with an annular groove for installing a sealing ring; the annular groove is located between the male ridge and the sealing bottom.

Further, in order to better realize the utility model, the inner wall surface of the inner ring is provided with an inclined guide surface for guiding the installation of the aircraft joint.

Further, in order to better realize the utility model, the outer ring is provided with a plurality of hollowed-out parts for weight reduction in a circumferential direction.

Further, in order to better realize the utility model, the number of the balls, the number of the convex spines and the number of the limit holes are all N, and N is a positive integer not less than 2; the matched convex spines and the limiting holes form a working space for installing a ball.

Further, in order to better realize the utility model, the outer ring and/or the inner ring are/is provided with knurling for gripping anti-slip.

Compared with the prior art, the utility model has the following advantages:

(1) The plugging device for the aircraft joint provided by the utility model has the advantages that the aircraft joint is plugged by utilizing a structure mainly composed of the outer ring, the inner ring, the ball and the adjusting screw, the pressure test of an aircraft pipeline is ensured, and the plugging joint is convenient, quick and reliable to detach;

(2) The aircraft joint plugging device provided by the utility model can be used for plugging the aircraft joint with threads and also can be used for the aircraft joint without threads, so that the applicability is wider;

(3) According to the aircraft joint plugging device provided by the utility model, the application and withdrawal of the aircraft joint enclasping force are realized by utilizing the enclasping force applying unit formed by the convex spines, the limiting holes and the balls, and meanwhile, the relative rotation angles of the outer ring and the inner ring are limited by utilizing the adjusting screw;

(4) The sealing ring is additionally arranged in the aircraft joint plugging device provided by the utility model, so that better sealing performance is provided.

Drawings

Fig. 1 is an overall view of the utility model with the opening up.

Fig. 2 is a view showing the whole structure of the utility model with the opening downward.

Fig. 3 is a schematic perspective view of an outer ring according to the present utility model.

Fig. 4 is a front view of the outer race.

Fig. 5 is a left side view of the outer race.

Fig. 6 is a cross-sectional view taken along the A-A plane in fig. 5.

Fig. 7 is a top view of the outer race.

Fig. 8 is a schematic view of a male ratchet structure.

Fig. 9 is a schematic perspective view of an inner ring according to the present utility model.

Fig. 10 is a front view of the inner race.

FIG. 11 is a cross-sectional view taken along the B-B plane in FIG. 10.

Fig. 12 is a cross-sectional view taken along the C-C plane in fig. 10.

Fig. 13 is an enlarged partial schematic view of D in fig. 11.

Fig. 14 is a schematic view showing a state in which the ball is located in the convex-concave portion.

Fig. 15 is a schematic view showing a state where the ball is located at the convex ratchet.

Wherein: 1. an outer ring; 101. a convex spine; 102. a screw mounting hole; 103. a hollowed-out part; 2. an inner ring; 201. a limiting hole; 202. knurling reticulate patterns; 203. a waist-shaped groove; 204. an inclined guide surface; 205. an annular groove; 206. sealing the bottom; 207. positioning the blind hole; 3. a seal ring; 4. an adjusting screw; 5. a ball;

x1, peak; x2, slope part; x3, valley portions; x4, a concave part.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments provided in the drawings is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1:

the embodiment provides an aircraft joint plugging device, as shown in fig. 1 and 2, comprising an outer ring 1, an inner ring 2, an adjusting screw 4 and balls 5, wherein the inner ring 2 is provided with a sealing bottom 206 for sealing the end face of an aircraft joint; the outer ring 1 is provided with a convex ratchet 101 with a molded surface protruding from the inner wall surface of the outer ring 1; the inner ring 2 is provided with a limiting hole 201 penetrating through the inner wall surface of the inner ring 2 and the outer wall surface of the inner ring 2, and an opening of the limiting hole 201 close to the inner wall surface of the inner ring 2 limits the ball 5 to be unable to pass through; after the outer ring 1 is sleeved with the inner ring 2, the convex spines 101 and the limiting holes 201 form a working space for movably mounting the balls 5 together; the outer ring 1 and the inner ring 2 which movably clamp the balls 5 are connected into a whole through the adjusting screw 4.

When the adjusting screw 4 is not locked, the outer ring 1 and the inner ring 2 can relatively rotate along the central axis of the plugging device, the position of the convex ratchet 101 opposite to the limiting hole 201 is changed along with the relative rotation, and the difference of the protrusion heights of the molded surface of the convex ratchet 101 relative to the inner wall surface of the outer ring 1 is utilized to ensure that the heights of the balls 5 protruding from the inner wall surface of the inner ring 2 in the limiting hole 201 are different, namely the diameters d of the working surfaces corresponding to the balls 5 are different; when the adjusting screw 4 is locked, the outer ring 1 and the inner ring 2 are locked and can not rotate relatively.

In this embodiment, when the outer ring 1 and the inner ring 2 rotate relatively, the position of the protruding ratchet 101 facing the limiting hole 201 changes accordingly; the protruding ratchet 101 uses the difference of the protruding height of the profile surface with respect to the inner wall surface of the outer ring 1 to make the depth of the balls 5 in the limiting hole 201 different, and at this time, the heights of the balls 5 protruding from the inner wall surface of the inner ring 2 in the limiting hole 201 are different, that is, the diameters d of the working surfaces corresponding to the balls 5 are different. As shown in fig. 14 and 15, when the balls 5 protrude further from the inner wall surface of the inner ring 2, the center of the balls 5 is closer to the central axis of the inner ring 2, and the diameter d of the working surface corresponding to the balls 5 is smaller, so that the balls can be folded toward the center to hold the outer wall of the aircraft joint extending into the plugging device; when the center of the ball 5 is far from the central axis of the inner ring 2, the diameter d of the working surface corresponding to the ball 5 is larger, and when the diameter d of the working surface is larger than the outer diameter of the aircraft joint, the aircraft joint and the plugging device can be easily detached.

Therefore, the core technical concept of the utility model is to change the gathering degree of the ball 5 to the central axis of the plugging device by using the profiles with different protrusion heights on the convex spines 101, so as to realize the clasping or loosening of the aircraft joint inserted with the plugging device. Specifically, based on the structural feature that the male ratchet 101 has different height profiles, the positions of the male ratchet 101 corresponding to the limiting hole 201 are changed when the outer ring 1 and the inner ring 2 relatively rotate, and then the positions of the male ratchet 101 with different height profiles protrude on the balls 5 in the limiting hole 201, so that the gathering degree of the balls 5 to the central axis of the plugging device is different.

When the balls 5 gradually gather towards the central axis of the plugging device and exert a holding force on the outer wall of the aircraft joint, the whole plugging device is tightly connected with the aircraft joint, and the installation is completed. At this time, the inner ring 2 with the sealing bottom 206 is wrapped around the end of the aircraft joint, so as to realize the sealing connection of the plugging device to the aircraft joint.

The aircraft joint plugging device that this embodiment provided utilizes the structure that mainly comprises outer lane 1, inner circle 2, ball 5, adjusting screw 4, through the relative declination of rotatory regulation outer lane 1 and inner circle 2, makes the protruding thorn 101 that sets up on outer lane 1 and the spacing hole 201 relative position that sets up on inner circle 2 change, and the difference of the profile height of the protruding thorn 101 of reuse changes the size that ball 5 corresponds working face diameter to change the holding power size of ball 5 to aircraft joint outer wall, realize plugging device's quick assembly disassembly, all can be suitable for the joint that has the screw thread design simultaneously.

In another specific embodiment, the number of the balls 5, the number of the protruding spines 101 and the number of the limiting holes 201 are all N, where N is a positive integer not less than 2; the matching male ratchet 101 and the limiting hole 201 together form a working space for installing the ball 5. Further, the N limiting holes 201 are all arranged on the same cross section of the inner ring 2 and are annularly and uniformly distributed; the N convex spines 101 are all arranged on the same cross section of the outer ring 1 and are annularly and uniformly distributed; the positions of the N limiting holes 201 and the N convex spines 101 are in one-to-one correspondence to form N working spaces, and one ball 5 is arranged in each working space, so that the N balls 5 form annular distribution on the same cross section of the plugging device. With this structure, the holding force is applied to the aircraft joint to be clamped by the plurality of balls 5 at the same time, so that the force application is more uniform and the connection is more stable.

Example 2:

this example was further optimized on the basis of example 1.

The convex spines 101 have two main functions: firstly, after the ball 5 is directly mounted on the outer ring 1 and the inner ring 2, the ball 5 is limited to move only in one limiting hole 201, and besides normal disassembly, the ball 5 cannot be separated from the outer ring 1 or the inner ring 2 or run to other limiting holes 201; and secondly, changing the position of the ball 5 in the radial direction of the plugging device, namely changing the distance between the center of the ball 5 and the central axis of the plugging device.

This embodiment achieves the two main effects described above by the profile of the male ratchet 101. As shown in fig. 3, 6, 7 and 8, the profile of the male ratchet 101 includes a peak portion X1, a slope portion X2 and a valley portion X3; wherein the peaks X1, the slopes X2 and the valleys X3 are arranged according to the protruding height of the profile relative to the inner wall surface of the outer ring 1 from top to bottom.

In this embodiment, the most important structure of the profile of the male ratchet 101 is the slope X2, the male ratchet 101 is that the slope X2 of the profile is used to contact with the ball 5 at a corresponding position, when the outer ring 1 and the inner ring 2 rotate relatively, the slope X2 rotating with the outer ring will change the contact position with the ball 5, so as to change the distance between the center of the ball 5 and the central axis of the plugging device. The highest point of one slope X2 corresponds to the peak X1 and the lowest point corresponds to the valley X3.

As shown in fig. 14 and 15, the ball 5 contacts the slope portion X2 of the profile of the male ratchet 101, and the smaller the working surface diameter d of the ball 5 is, the closer to the peak portion X1, and the larger the working surface diameter d of the ball 5 is, the closer to the valley portion X3. The ball 5 contacts with the peak portion X1 of the profile of the convex spine 101, and the diameter d of the working surface corresponding to the ball 5 is minimum. The ball 5 contacts with the valley portion X3 of the profile of the convex spine 101, and the diameter d of the working surface corresponding to the ball 5 is the largest. The position of the crest X1 of the male ratchet 101 facing the limiting hole 201 may be denoted as a state a, the position of the slope X2 of the male ratchet 101 facing the limiting hole 201 may be denoted as a state B, and the position of the valley X3 of the male ratchet 101 facing the limiting hole 201 may be denoted as a state C; from the state A to the state B, the working surface diameter d corresponding to the ball 5 is from small to large. That is, when the ball 5 is in state C, the distance between the center of the ball 5 and the central axis of the occlusion device is the farthest; when the ball 5 is in state a, the distance between the centre of the ball 5 and the centre axis of the occlusion device is closest.

Other portions of this embodiment are the same as those of embodiment 1, and thus will not be described in detail.

Example 3:

this embodiment is further optimized on the basis of embodiment 1 or embodiment 2.

After the plugging device is installed, or when the plugging device is used normally to plug an aircraft joint, the ball 5 is usually limited to only contact with the slope portion X2 of the profile of the convex spine 101, but not to be located at two limit positions of the peak portion X1 and the valley portion X3.

First, the peak X1. The size design of the peak part X1 mainly considers that the inner ring 2 and the outer ring 1 can still keep a good limiting effect when slightly deforming.

As shown in fig. 7, the outer ring 1 is provided with 12 annular convex spines 101 which are uniformly distributed, and each convex spine 101 is spaced at 30 degrees; the profile of each male ratchet 101 has peaks X1, slopes X2, valleys X3.

In another embodiment, as shown in fig. 8, a concave portion X4 is added to the profile of the male ratchet 101, and the concave portion X4 is disposed at a position of the slope portion X2 near the peak portion X1. Since the profile suddenly changes from a uniformly transition slope X2 to a slightly concave depression X4, the feeling of the reaction is fed back when the outer ring 1 and the inner ring 2 are rotated, so that the position where the ball 5 is in surface contact with the convex spines 101 is indicated to be close to the peak X1.

Second, the valley X3. The size of the valley X3 mainly considers how the balls 5 are quickly assembled and disassembled between the outer ring 1 and the inner ring 2, and particularly the installation problem.

The balls 5 may be mounted by way of bearing balls, but the removal of existing bearing balls is mostly destructive. The present embodiment provides another way to install the balls 5 based on the profile structure of the male ratchet 101, so that the balls 5 can be installed quickly and the balls 5 can be detached easily. In this embodiment, the balls 5 are assembled and disassembled through the profile structure of the protruding ratchet 101: when the balls 5 are located at the valley portions X3 of the male ratchet 101, the balls 5 can be separated from the limit of the limit hole 201, and the outer ring 1 and the inner ring 2 can be detached or installed at this time; when the balls 5 are positioned on the slope portion X2 or the peak portion X1 of the male ratchet 101, the outer ring 1 and the inner ring 2 cannot be detached or attached. During actual installation, firstly, oil is smeared on the balls 5, the smeared balls 5 are placed at the valley portions X3 of the convex spines 101 to enable the balls 5 to be just located between the outer ring 1 and the inner ring 2, then the outer ring 1 is rotated or the inner ring 2 is rotated, the position of the convex spines 101 facing the limiting holes 201 is changed, the slope portions X2 of the molded surfaces of the convex spines 101 push the balls 5, after the balls 5 enter the limiting holes 201, the relative positions of the outer ring 1 and the inner ring 2 are limited through the adjusting screws 4, and when the plugging device is used normally, the valley portions X3 of the convex spines 101 cannot face the limiting holes 201.

Further, in order to ensure that the whole formed after the balls 5 are mounted on the outer ring 1 and the inner ring 2 is not scattered during normal use, the whole can be limited by adding a limiting piece, setting a limiting butt joint part and the like. In this embodiment, the adjusting screw 4 connected to the outer ring 1 and the inner ring 2 simultaneously is used for limiting.

Other portions of this embodiment are the same as those of embodiment 1 or embodiment 2, and thus will not be described in detail.

Example 4:

this example was further optimized on the basis of any one of examples 1 to 3.

Based on the plugging device, through the change of rotation operation outer lane 1 the relative declination of inner circle 2, drive the slope X2 of protruding thorn 101 profile and promote ball 5 and change the working face diameter d that ball 5 corresponds, realize the design thinking that holds tightly or relax to the aircraft joint, combine through simultaneously with outer lane 1 the adjusting screw 4 that inner circle 2 is connected carries out spacing design thinking. The present embodiment provides a specific embodiment, wherein one of the outer ring 1 and the inner ring 2 is provided with a structure for fixedly mounting the adjusting screw 4, and the other is provided with a structure for limiting the moving position of the adjusting screw 4, so as to limit the relative rotation amplitude of the outer ring 1 and the inner ring 2.

Specifically, as shown in fig. 3 and 5, the outer ring 1 is provided with a connecting lug, and the connecting lug is provided with a screw mounting hole 102. As shown in fig. 9 and 10, the outer wall of the inner ring 2 is provided with a waist-shaped groove 203. The limiting end part of the adjusting screw 4 passes through the screw mounting hole 102 and then stretches into the waist-shaped groove 203; when the limiting end of the adjusting screw 4 is not fastened in the waist-shaped groove 203, the outer ring 1 and the inner ring 2 relatively rotate and drive the limiting end of the adjusting screw 4 to move in the waist-shaped groove 203; when the limiting end of the adjusting screw 4 is fastened in the waist-shaped groove 203, the outer ring 1 and the inner ring 2 are locked and can not rotate relatively.

Further, the limiting end of the adjusting screw 4 is mounted in the waist-shaped groove 203 to limit the relative rotation angle of the outer ring 1 and the inner ring 2, and the balls 5 cannot be separated from the space between the outer ring 1 and the inner ring 2.

In another embodiment, as shown in fig. 11, 12 and 13, the bottom of the waist-shaped groove 203 is also provided with a positioning blind hole 207. When the limiting end of the adjusting screw 4 moves to the positioning blind hole 207, the ball 5 just corresponds to the concave part X4 of the profile of the convex ratchet 101.

In another embodiment, a connecting lug with a screw mounting hole 102 may be provided in the inner ring 2, and a waist-shaped groove 203 may be provided in the outer ring 1. The principles of the connecting lug with the screw mounting hole 102 formed in the inner ring 2 and the waist-shaped groove 203 formed in the outer ring 1 are the same as those of the connecting lug with the screw mounting hole 102 formed in the outer ring 1 and the waist-shaped groove 203 formed in the inner ring 2, and therefore the description is omitted.

In another embodiment, the waist-shaped groove 203 in the above structure is replaced with two protrusions, and the adjusting screw 4 is limited to move only between the two protrusions.

In another specific embodiment, a spring and a ball are arranged in the stud of the adjusting screw 4, and the free end of the spring is connected with the ball arranged at the limit end. When the adjusting screw 4 adopts this structure, a flexible locking force can be provided. The flexible locking force is softer than the rigid locking force: when the adjusting screw 4 is screwed, the adjusting screw can normally operate with larger and smaller force, and parts are not easy to damage; after the plugging device is installed on the aircraft joint, the plugging device can also have a certain buffering effect if being subjected to intense shaking or impact. Of course, the adjusting screw 4 may be directly commercially available, such as: set screw of the model QiZHAN PBHS. Ball plunger GN815 cap type spring positioning ball PBFH with head-in-line groove threaded locking pin Z36 wave ball screw. The spring inside the screw and the ball at the top are utilized to enable the device to be still adjustable when the aircraft joint is blocked for enclasping.

Other portions of this embodiment are the same as any one of embodiments 1 to 3, and thus will not be described again.

Example 5:

this example was further optimized on the basis of any one of examples 1 to 4. Specifically, in order to improve the service life of the product, details of the structure of the limiting hole 201 are set.

First, the cross section of the limiting hole 201 in embodiment 1, embodiment 2, embodiment 3, and embodiment 4 may be a common circle, square, triangle, a rare star, a crescent, or a non-standard shaped profile. So long as the function can be ensured.

However, the present embodiment designs the shape of the cross section of the limiting hole 201 to be circular in consideration of the processing cost, the fit between parts, and the like. At this time, the limiting hole 201 is a cylindrical through hole.

Secondly, the limiting hole 201 is used for limiting and guiding the ball 5, and in order to reduce the abrasion of the sharp structure on the surface of the ball 5, in this embodiment, one end of the limiting hole 201, which is close to the outer wall surface of the inner ring 2, is rounded or chamfered. Rounding or chamfering sharp structures is a deburring operation common to machining. One end of the limiting hole 201, which is close to the outer wall surface of the inner ring 2, is free of rounding and chamfering, and limiting guiding of the limiting hole 201 on the ball 5 is not affected.

In another embodiment, in order to better perform the guiding function of the limiting hole 201, a guiding surface capable of guiding the balls 5 is formed at one end of the limiting hole 201 near the outer wall surface of the inner ring 2. The caliber of one end of the guide surface, which is close to the inner wall surface of the outer ring 1, is larger, and the caliber of one end of the guide surface, which is far away from the inner wall surface of the outer ring 1, is smaller.

Further, considering the spherical structure of the ball 5, the guide surface is a tapered surface or a sphere-like surface.

Other portions of this embodiment are the same as any one of embodiments 1 to 4, and thus will not be described in detail.

Example 6:

this example was further optimized on the basis of any one of examples 1 to 5.

Specifically, in order to improve the sealing performance of the plugging device, a sealing ring 3 is additionally arranged. As shown in fig. 9, the inner wall of the outer ring 1 is provided with an annular groove 205 for mounting the seal ring 3; the annular groove 205 is located between the male luer 101 and the sealing bottom 206.

Further, an inner wall surface of the inner ring 2 is provided with an inclined guide surface 204 for guiding the installation of the aircraft joint. The inclined guide surface 204 extends from the open end of the inner ring 2 to the inner cavity where the sealing bottom 206 is provided, ending in a notch of the annular groove 205. As shown in fig. 11, the inclined guide surface 204 has an included angle of 2 ° in the profile line in the section B-B, that is, the taper of the inclined guide surface 204 is 1 °.

Other portions of this embodiment are the same as any one of embodiments 1 to 5, and thus will not be described in detail.

Example 7:

this example was further optimized on the basis of any one of examples 1 to 6.

The outer ring 1 is provided with a plurality of hollowed-out parts 103 for reducing weight in a circumferential direction. In general, as shown in fig. 4, the hollowed-out portion 103 adopts a rectangular groove structure.

Other portions of this embodiment are the same as any one of embodiments 1 to 6, and thus will not be described in detail.

Example 8:

this example was further optimized on the basis of any one of examples 1 to 7.

The outer ring 1 and/or the inner ring 2 are/is provided with knurled cross-hatching 202 for grip-slip prevention.

Other portions of this embodiment are the same as any one of embodiment 1 to embodiment 7, and thus will not be described in detail.

The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification and equivalent variation of the above embodiment according to the technical matter of the present utility model falls within the scope of the present utility model.

Claims (10)

1. An aircraft joint plugging device, its characterized in that: the aircraft joint comprises an outer ring (1), an inner ring (2), an adjusting screw (4) and balls (5), wherein the inner ring (2) is provided with a sealing bottom (206) for sealing the end face of the aircraft joint; the outer ring (1) is provided with a convex ratchet (101) with a molded surface protruding from the inner wall surface of the outer ring (1); the inner ring (2) is provided with a limiting hole (201) penetrating through the inner wall surface of the inner ring (2) and the outer wall surface of the inner ring (2), and an opening of the limiting hole (201) close to the inner wall surface of the inner ring (2) limits the ball (5) from penetrating; after the outer ring (1) is sleeved with the inner ring (2), the convex spines (101) and the limiting holes (201) form a working space for movably mounting the balls (5); the outer ring (1) and the inner ring (2) which movably clamp the balls (5) are connected into a whole through the adjusting screw (4);

when the adjusting screw (4) is not locked, the outer ring (1) and the inner ring (2) can relatively rotate along the central shaft of the plugging device, the position of the convex spines (101) opposite to the limiting holes (201) is changed along with the position, and the difference of the protrusion heights of the molded surfaces of the convex spines (101) relative to the inner wall surfaces of the outer ring (1) is utilized, so that the heights of the balls (5) protruding out of the inner wall surfaces of the inner ring (2) from the limiting holes (201) are different, namely, the diameters d of the corresponding working surfaces of the balls (5) are different;

when the adjusting screw (4) is locked, the outer ring (1) and the inner ring (2) are locked and can not rotate relatively.

2. The aircraft joint plugging device according to claim 1, wherein: the convex spines (101) are arranged from top to bottom according to the protruding height of the molded surface relative to the inner wall surface of the outer ring (1), and the molded surface of the convex spines (101) comprises peaks (X1), slopes (X2) and valleys (X3);

the balls (5) are in contact with the slope (X2) of the profile of the convex spines (101), the smaller the working surface diameter d corresponding to the balls (5) is, the closer to the peak (X1) is, and the larger the working surface diameter d corresponding to the balls (5) is, the closer to the valley (X3) is; the ball (5) is in contact with the peak (X1) of the profile of the convex spine (101), and the diameter d of the working surface corresponding to the ball (5) is minimum; the ball (5) is in contact with the valley (X3) of the profile of the convex spine (101), and the diameter d of the working surface corresponding to the ball (5) is the largest.

3. An aircraft joint plugging device according to claim 2, wherein: when the ball (5) is positioned at the valley (X3) of the convex ratchet (101), the ball (5) can be separated from the limit of the limit hole (201), and at the moment, the outer ring (1) and the inner ring (2) can be detached or installed; when the ball (5) is positioned on the slope (X2) or the peak (X1) of the convex ratchet (101), the outer ring (1) and the inner ring (2) cannot be detached or installed.

4. The aircraft joint plugging device according to claim 1, wherein: the limiting hole (201) is a cylindrical through hole; the end of the limiting hole (201) close to the outer wall surface of the inner ring (2) is provided with a rounding or chamfering for removing machining burrs, or the end of the limiting hole (201) close to the outer wall surface of the inner ring (2) is provided with a guiding surface capable of guiding the balls (5).

5. The aircraft joint plugging device according to claim 1, wherein: the outer ring (1) is provided with a connecting lug, and the connecting lug is provided with a screw mounting hole (102); the outer wall of the inner ring (2) is provided with a waist-shaped groove (203); the limiting end part of the adjusting screw (4) penetrates through the screw mounting hole (102) and then stretches into the waist-shaped groove (203); when the limiting end of the adjusting screw (4) is not fastened in the waist-shaped groove (203), the outer ring (1) and the inner ring (2) relatively rotate and drive the limiting end of the adjusting screw (4) to move in the waist-shaped groove (203) along with the limiting end; when the limiting end of the adjusting screw (4) is fastened in the waist-shaped groove (203), the outer ring (1) and the inner ring (2) are locked and cannot rotate relatively.

6. The aircraft joint plugging device according to claim 5, wherein: the limiting end of the adjusting screw (4) is arranged in the waist-shaped groove (203) in a limiting mode, the relative rotation angle of the outer ring (1) and the inner ring (2) is limited, and at the moment, the balls (5) cannot be separated from the space between the outer ring (1) and the inner ring (2).

7. An aircraft joint plugging device according to any one of claims 1-6 wherein: also comprises a sealing ring (3); an annular groove (205) for installing a sealing ring (3) is formed in the inner wall of the outer ring (1); the annular groove (205) is located between the male ridge (101) and the sealing bottom (206).

8. The aircraft joint plugging device according to claim 7, wherein: the inner wall surface of the inner ring (2) is provided with an inclined guide surface (204) for guiding the installation of the aircraft joint.

9. An aircraft joint plugging device according to any one of claims 1-6 wherein: the outer ring (1) is provided with a plurality of hollowed-out parts (103) for reducing weight in a circumferential direction.

10. An aircraft joint plugging device according to any one of claims 1-6 wherein: the number of the balls (5), the number of the convex spines (101) and the number of the limit holes (201) are N, and N is a positive integer not less than 2; a male ratchet (101) and a limiting hole (201) matched in position form a working space for installing a ball (5).