Skin hole stopper

Abstract

The utility model provides a skin hole stopper, which relates to the field of aerospace manufacturing technology. It includes a clamping sleeve for clamping and fixing a drill bit, and a locking sleeve for locking and fixing the clamping sleeve. A rotating bearing is fixedly arranged at one end of the clamping sleeve, and the inner ring of the rotating bearing is fixed to the clamping sleeve, and a stop pad is arranged on the outer ring. The stop pad and the clamping sleeve are located on the opposite side of the rotating bearing. The utility model clamps and fixes the drill bit by the clamping sleeve, and then uses the locking sleeve to lock and fix it, so that the device and the drill bit form a reliable integrated structure, which is suitable for high-speed movement occasions, and then the clamping sleeve is fixed to the inner ring of the bearing, and the stop pad is fixed to the outer ring of the bearing, so that the drill bit and the inner ring move in unison, and the stop pad and the outer ring move in unison, so that the drilling hole and the stop pad move independently, thereby ensuring the drilling depth without damaging the skin.

Description

Technical Field

[0001] The utility model relates to the technical field of aerospace manufacturing, in particular to a skin hole-making stopper. Background Art

[0002] The field of aerospace manufacturing technology, especially the precision drilling process of aircraft skin, has been pursuing higher precision and safety. With the development of technology, automation and robotic drilling technology have made significant progress. These technologies improve drilling efficiency, reduce the harm to human health caused by harsh production environments, and improve the quality of connection holes, which directly affects the fatigue life of the connection.

[0003] At present, a variety of technologies have been proposed to improve the drilling process of aircraft skin and frame assembly. For example, patent CN114888164A introduces an electromagnetic hole-guiding method and device for aircraft skin and frame assembly, which uses electromagnetic principles to achieve efficient and accurate automatic alignment of the hole-guiding position. In addition, there is patent CN117968560A, which involves an in-situ measurement method and device for the depth of aircraft skin countersink holes, which is used to improve the hole making accuracy.

[0004] Although existing technologies have made progress in improving drilling accuracy and efficiency, there are still problems such as operational complexity, high equipment costs, and limited applicability in specific environments. In addition, existing technologies usually require workers to have high skills, especially when performing manual drilling in complex aircraft structures and small working spaces, which increases the dependence on highly skilled operators, limits production efficiency, and may lead to unstable drilling quality.

[0005] Therefore, solving the problem of how to achieve precise control of the drill feed depth without damaging the skin in the field of aerospace manufacturing, especially in manual drilling operations, is a particularly important technical problem in aerospace manufacturing, because the structure under the skin is usually very sensitive, and any damage may cause the performance of the entire aircraft to decline or even fail. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] In view of this, the purpose of the utility model is to provide a skin hole limiter, which can be directly installed on the drill bit and control the feed depth of the drill bit through a simple and effective mechanism, thereby avoiding damage to the structure under the skin, so as to solve the problems of the prior art in manual drilling in complex aircraft structures and narrow working spaces, such as dependence on highly skilled operators, limited production efficiency and unstable drilling quality.

[0008] (II) Technical solution

[0009] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] The skin hole limiter comprises a clamping sleeve for clamping and fixing a drill bit and a locking sleeve for locking and fixing the clamping sleeve. A rotating bearing is fixedly arranged at one end of the clamping sleeve. The inner ring of the rotating bearing is fixed to the clamping sleeve, and a stop pad is arranged on the outer ring. The stop pad and the clamping sleeve are located on the opposite sides of the rotating bearing.

[0011] Furthermore, the clamping sleeve includes a matching section and a locking section integrally provided with the matching section, the matching section is provided with a matching taper gradually increasing from the distal end of the locking section to the proximal end of the locking section, and the locking section is provided with a locking external thread.

[0012] Furthermore, the inner cavity of the locking sleeve is provided with a clamping section and a tightening section, the clamping section is provided with a clamping taper that is clamped with the matching taper, and the tightening section is provided with a tightening internal thread that is screwed with the locking external thread.

[0013] Furthermore, a plurality of open grooves are equidistantly arranged in the circumferential direction of the matching taper.

[0014] Furthermore, the number of the open slots is 2-5 in total.

[0015] Furthermore, the locking sleeve is provided with a Morse taper and a gripping mesh.

[0016] Furthermore, the stop pad is made of elastic material.

[0017] Beneficial Effects

[0018] The utility model clamps and fixes the drill bit by a clamping sleeve, and then uses a locking sleeve to lock and fix it, so that the device and the drill bit form a reliable integrated structure, and then the clamping sleeve is fixed to the inner ring of the bearing, and the stop pad is fixed to the outer ring of the bearing, so that the drill bit and the inner ring move in unison, and the stop pad is consistent with the outer ring, so that the drilling and the stop are independent, so that the skin will not be damaged. Compared with the prior art, it has the following advantages:

[0019] 1. Improve safety: By precisely controlling the feed depth of the drill bit, damage to important structures and equipment under the skin during the drilling process is effectively avoided, thereby significantly improving the safety of the aerospace manufacturing process.

[0020] 2. Easy to operate: It simplifies the complexity of traditional drilling operations, allowing workers to operate without long-term professional training, lowering the technical threshold.

[0021] 3. Improve efficiency: It is simple and convenient to use, which can significantly improve the efficiency of drilling operations and reduce losses and scrap caused by improper operation.

[0022] 4. Reduced costs: Reduced reliance on highly skilled operators helps reduce labor costs. At the same time, reduced risk of damage also means lower potential repair and replacement costs.

[0023] 5. Wide applicability: It is suitable for various manual drilling equipment and can maintain its excellent performance no matter in a small space or a complex environment.

[0024] 6. Reliable structure: The integrated clamping device and bearing design, as well as the rubber pad braking mechanism, ensure the stability and reliability of the utility model under high-speed rotation and drilling pressure.

[0025] 7. Strong compatibility: The utility model allows for use with a variety of drill bits, increasing its compatibility and flexibility in different drilling tasks.

[0026] 8. Simple maintenance: Due to the simplicity of structure, the utility model is easy to maintain and clean, further reducing the long-term use cost.

[0027] In summary, the skin hole limiter of the utility model has significant advantages in improving the safety, convenience and efficiency of aerospace manufacturing drilling operations, while also reducing costs and technical barriers, and has good market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a 3D schematic diagram of the utility model;

[0029] Figure 2 It is the front view of the utility model;

[0030] Figure 3 for Figure 2 Section view along AA.

[0031] Description of reference numerals:

[0032] 1-clamping sleeve; 2-locking sleeve; 3-rotating bearing; 4-stop pad; 5-matching taper; 6-locking external thread; 7-engaging taper; 8-tightening internal thread; 9-opening groove; 10-Morse taper; 11-holding mesh; 12-drill bit. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Embodiment 1:

[0035] like Figure 1-3 As shown, this embodiment provides a skin hole limiter, including a clamping sleeve 1 and a locking sleeve 2. The clamping sleeve is used to clamp and fix a drill bit 12, and the locking sleeve is used to lock and fix the clamping sleeve, so that the clamping sleeve and the drill bit are connected as a whole. In particular, this embodiment also includes a rotating bearing 3, the axis of the rotating bearing is consistent with the clamping sleeve, that is, they are coaxially arranged, and the inner ring of the rotating bearing is fixed to the clamping sleeve, that is, the rotational power is provided by the clamping sleeve, and a stop pad 4 is fixedly arranged on the outer ring of the rotating bearing, and the stop pad and the clamping sleeve are located on the opposite sides of the rotating bearing, so that the rotation of the drill bit and the rotation of the stop pad are both related and unrelated. On the one hand, the two are respectively fixed to the inner and outer rings of the bearing, so that the two The rotation centers of the two are consistent, and both rotate around the same center. On the other hand, although the two are coaxial, they are not necessarily at the same speed. Therefore, the possibility of relative movement between the two is given. In actual use, this characteristic is utilized. When the drill bit drills to a predetermined depth, the stop pad rests against a surface of the skin. Due to the action of the stop pad, the drill bit can continue to rotate under the action of the inner ring, but no longer moves forward, thereby preventing further drilling. At this time, on the one hand, the drilling depth meets the design requirements, and on the other hand, due to the isolation of the stop pad, the damage to the skin is reduced. By selecting suitable materials, it is possible to effectively prevent the drill bit from passing forward and reduce the damage to the skin.

[0036] In this embodiment, the clamping sleeve includes a matching section and a locking section integrally provided with the matching section, the matching section is provided with a matching taper 5 gradually increasing from the distal end of the locking section to the proximal end of the locking section, and the locking section is provided with a locking external thread 6. Correspondingly, the inner cavity of the locking sleeve of this embodiment is provided with a clamping section and a tightening section, the clamping section is provided with a clamping taper 7 clamped with the matching taper, and the tightening section is provided with a tightening internal thread 8 screwed with the locking external thread. When in use, the tightening internal thread is screwed into the thread of the tightening internal thread, and the clamping taper squeezes the matching taper, forming a clamping state for the drill bit, so that the stopper and the drill bit are fixed together to form a whole. This taper clamping and thread locking have extremely high reliability and are suitable for high-speed rotating drilling operations.

[0037] In this embodiment, a plurality of open grooves 9 are equidistantly arranged in the circumferential direction of the matching taper. The existence of these open grooves enables the matching taper to have a certain circumferential elastic recovery force, a higher elasticity level, and a stronger deformation ability. Under the action of the engaging taper, a better fastening level can be achieved.

[0038] The number of such open slots can be about 2-5. In this embodiment, four are selected to achieve a better elasticity level.

[0039] In this embodiment, the locking sleeve is provided with a Morse taper 10, which can be locked with the rotary driver to perform a drilling operation.

[0040] In this embodiment, the locking sleeve is further provided with a gripping mesh 11, which is an imprint with a certain depth and has a certain friction resistance when held by hand, thereby improving the fixing level, so that rotation locking or disassembly operations can be performed.

[0041] In this embodiment, the stop pad is made of elastic material such as rubber, etc., so that when it contacts the skin, it has a certain elastic deformation ability, thereby preventing damage to the contact part of the skin.

[0042] This embodiment has a simple structure and can be directly mounted on the drill bit. It controls the feed depth of the drill bit through a simple and effective mechanism, thereby avoiding damage to the structure under the skin. It not only improves the safety and accuracy of the drilling operation, but also reduces the technical threshold of the operation, so that more workers can perform drilling operations safely and accurately without long-term professional training.

[0043] In addition, this embodiment can improve production quality, reduce accident risks, reduce costs, and may play an important role in future aerospace manufacturing.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The skin hole stopper is characterized by: It comprises a clamping sleeve for clamping and fixing a drill bit and a locking sleeve for locking and fixing the clamping sleeve. A rotating bearing is fixedly arranged at one end of the clamping sleeve. The inner ring of the rotating bearing is fixed to the clamping sleeve. A stopping pad is arranged on the outer ring. The stopping pad and the clamping sleeve are located on the opposite sides of the rotating bearing.

2. The skin hole stopper according to claim 1, characterized in that: The clamping sleeve comprises a fitting section and a locking section integrally arranged with the fitting section, the fitting section is provided with a fitting taper gradually increasing from the far end of the locking section to the near end of the locking section, and the locking section is provided with a locking external thread.

3. The skin hole stopper according to claim 2, characterized in that: The inner cavity of the locking sleeve is provided with a clamping section and a tightening section, the clamping section is provided with a clamping taper clamped with the matching taper, and the tightening section is provided with a tightening internal thread screwed with the locking external thread.

4. The skin hole stopper according to claim 2, characterized in that: A plurality of open grooves are arranged equidistantly in the circumferential direction of the matching taper.

5. The skin hole stopper according to claim 4, characterized in that: There are 2 to 5 opening slots in total.

6. The skin hole stopper according to any one of claims 1 to 5, characterized in that: The locking sleeve is provided with a Morse taper and a gripping mesh.

7. The skin hole stopper according to any one of claims 1 to 5, characterized in that: The stopping pad is made of elastic material.

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