Double bearing anti-rotation aircraft bushing press tool

Abstract

The utility model discloses a kind of double-bearing anti-rotation type aircraft bushing press-fit tools, it is related to aviation structure assembly technical field.The tool includes bolt shaft, finished bushing, nut, further include head plane ball bearing, tail plane ball bearing, guide bushing and sleeve;The head of bolt shaft is successively equipped with head plane ball bearing, finished bushing and guide bushing, tail is successively equipped with sleeve, tail plane ball bearing, end thread connection nut;Head plane ball bearing one side end surface and finished bushing front end surface directly contact, guide bushing directly contacts finished bushing end and synchronously axial motion with it, sleeve inner diameter is greater than guide bushing outer diameter.The utility model is equipped with double bearing, effectively prevent finished bushing from rotating in press-fit process, and avoid finished bushing scratch, improve press-fit precision and efficiency, and simple structure, convenient operation, suitable for widely popularization and application.

Description

Technical Field

[0001] This utility model relates to the field of aerospace structural assembly technology, specifically to a double-bearing anti-rotation aircraft bushing press tool. Background Technology

[0002] In the field of aerospace structural assembly, after the fuselage and wing components are assembled, the fuselage and wing need to be mated. To eliminate assembly errors and ensure interchangeability of the fuselage and wing components, the joint intersection holes of the frames and beams used for fuselage and wing mating must be precision machined. After the bottom holes are precision machined and inspected and approved, the finished bushings need to be pressed into the joint intersection holes of the parts using a press-fitting tool. However, the surface quality requirements of the finished bushings are high, and there are many problems in the traditional press-fitting process. The finished bushing will rotate relative to the joint intersection holes of the parts and the press-fitting tool, and the end face of the finished bushing will contact the press-fitting tool, which can easily cause scratches on the end face and surface of the finished bushing. At the same time, the traditional press-fitting process is relatively laborious, making it difficult to guarantee installation quality, causing inconvenience to aircraft assembly work, and affecting the performance and service life of related components. Utility Model Content

[0003] To address the aforementioned shortcomings, this utility model aims to provide a press-fitting tool with a dual-plane ball bearing for coordinated anti-rotation and a dynamic guide bushing for follow-up movement, thus solving the problems of finished bushing rotation, surface scratches, and laborious press-fitting operations.

[0004] To achieve the above technical objectives, the following technical solutions were adopted:

[0005] A dual-bearing anti-rotation aircraft bushing press-fitting tool includes a bolt shaft, a finished bushing, a nut, a head planar ball bearing, a tail planar ball bearing, a guide bushing, and a handle. The head of the bolt shaft is sequentially fitted with the head planar ball bearing, the finished bushing, and the guide bushing; the tail of the bolt shaft is sequentially fitted with the handle and the tail planar ball bearing, with the nut threaded to the end. One end face of the head planar ball bearing is in direct contact with the front end face of the finished bushing. The guide bushing directly contacts the end of the finished bushing and moves axially synchronously with it. The inner diameter of the handle is larger than the outer diameter of the guide bushing.

[0006] Furthermore, the bolt shaft head is provided with a socket wrench adapter head and an outer circular boss, which is close to the end face of the head plane ball bearing.

[0007] Furthermore, the end face of the head flat ball bearing completely covers the end face of the finished bushing.

[0008] Furthermore, the guide bushing has a stepped shaft structure, including a head end and a tail end. The outer diameter of the head end is the same as the outer diameter of the finished bushing, and the outer diameter of the tail end is smaller than the outer diameter of the head end.

[0009] Furthermore, the outer diameter of the guide bushing head is smaller than the diameter of the hole at the intersection of the parts joint, and the inner diameter of the handle sleeve is larger than the outer diameter of the guide bushing head.

[0010] Furthermore, a washer is provided between the tail flat ball bearing and the nut.

[0011] Furthermore, both the head and tail planar ball bearings are made of stainless steel and have undergone nitriding treatment.

[0012] The beneficial effects achieved by this utility model are:

[0013] This invention provides a dual-bearing anti-rotation aircraft bushing press-fit tool. By setting a head flat ball bearing and a tail flat ball bearing at both ends of the bolt shaft, during press-fitting, the tail flat ball bearing converts the rotational torque of the nut into axial thrust. This thrust, via a sleeve, pushes the bolt shaft forward. The head bearing contacts the end face of the finished bushing. When the bolt shaft is fixed by a socket wrench, rotational friction between the bolt shaft and the finished bushing is isolated, ensuring the finished bushing is only subjected to axial force without rotation. This allows the finished bushing to be press-fitted according to a preset direction and position, greatly improving press-fitting accuracy and reducing damage to parts and assembly errors caused by bushing rotation. Furthermore, a guide bushing provides precise guidance for the finished bushing and moves synchronously with it, ensuring smooth axial movement and preventing offset and wobbling during press-fitting, further improving press-fitting quality. The overall structure of this invention is compact, with simple and reasonable connections between components, facilitating assembly and disassembly, reducing worker workload, and improving operational convenience and efficiency. Attached Figure Description

[0014] The present invention will now be described in conjunction with the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of each component of this utility model.

[0017] Figure 3 This is a schematic diagram of the press-fitting process of this utility model.

[0018] In the diagram: 1-bolt shaft; 2a-head flat ball bearing; 2b-tail flat ball bearing; 3-finished bushing; 4-guide bushing; 5-handle sleeve; 6-nut; 7-part joint intersection hole. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. The described embodiments are merely some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] like Figure 1-3 As shown, this utility model discloses a double-bearing anti-rotation aircraft bushing pressing tool, comprising a bolt shaft 1, a finished bushing 3, a nut 6, a head flat ball bearing 2a, a tail flat ball bearing 2b, a guide bushing 4, and a handle 5; the head of the bolt shaft 1 is sequentially fitted with the head flat ball bearing 2a, the finished bushing 3, and the guide bushing 4, and the tail of the bolt shaft 1 is sequentially fitted with the handle 5 and the tail flat ball bearing 2b, with the nut 6 threadedly connected at the end.

[0021] The head of the bolt shaft 1 is provided with a socket wrench adapter head, which facilitates the socket wrench to rotate the bolt shaft 1. The rear is provided with an outer circular boss, which is close to one end face of the head plane ball bearing 2a and plays a limiting role in the head plane ball bearing 2a.

[0022] The other end face of the head flat ball bearing 2a is in direct contact with the front end face of the finished bushing 3, which can evenly transmit the pressing force to the finished bushing 3 and prevent the finished bushing 3 from rotating. Moreover, its end face completely covers the end face of the finished bushing 3, ensuring that the pressing force can be evenly applied to the finished bushing 3 and avoiding damage to the finished bushing 3 due to uneven force.

[0023] The guide bushing 4 moves axially synchronously with the finished bushing 3. It has a stepped shaft structure, including a head end and a tail end. The end face of the head end directly contacts the end of the finished bushing 3. Its outer diameter is the same as the outer diameter of the finished bushing 3 and smaller than the diameter of the joint hole 7 of the part, which facilitates insertion into the joint hole 7 of the part and achieves precise guidance. The outer diameter of the tail end is smaller than the outer diameter of the head end. The inner diameter of the handle 5 is larger than the outer diameter of the head end of the guide bushing 4, which ensures that the guide bushing 4 has sufficient movement space during the pressing process.

[0024] A washer is provided between the tail flat ball bearing 2b and the nut 6. The washer can increase the contact area between the tail flat ball bearing 2b and the nut 6, prevent the nut 6 from loosening, and ensure the stability of the press-fitting process.

[0025] Both the head flat ball bearing 2a and the tail flat ball bearing 2b are made of stainless steel and have undergone nitriding treatment, which improves the wear resistance and service life of the bearings.

[0026] The working principle of this utility model is as follows: Nut 6 is connected to bolt shaft 1 via threads. During tightening, a thrust is generated along the axial direction of bolt shaft 1. The thrust of nut 6 first acts on tail flat ball bearing 2b, which transmits the force to handle sleeve 5. Since the head of bolt shaft 1 is fixed by socket wrench (restricting its rotation), the thrust of handle sleeve 5 is transmitted to head flat ball bearing 2a through bolt shaft 1. Head flat ball bearing 2a transmits the axial force to finished bushing 3, causing finished bushing 3 to move into the part joint intersection hole 7 along the guide bushing 4. Under the action of axial force, finished bushing 3 overcomes the fitting resistance with part joint intersection hole 7 and is completely pressed into the hole. Guide bushing 4 moves synchronously with finished bushing 3, always maintaining the guidance of finished bushing 3 and preventing it from deviating.

[0027] The working process of this utility model is as follows:

[0028] During bushing press-fitting, first, the head flat ball bearing 2a, the finished bushing 3, and the guide bushing 4 are sequentially mounted on the bolt shaft 1, ensuring that the guide bushing 4 contacts the end of the finished bushing 3. The assembled bolt shaft 1 is then inserted into the joint hole 7 of the part, allowing the tail end of the guide bushing 4 to enter the hole and act as a guide. Next, the handle 5 and the tail flat ball bearing 2b are sequentially mounted on the tail of the bolt shaft 1, and finally, the nut 6 is tightened. A socket wrench is secured to the socket wrench adapter to prevent the bolt shaft 1 from rotating. The nut 6 is gradually tightened using a ratchet wrench. Under the action of the head flat ball bearing 2a and the tail flat ball bearing 2b, rotation of the finished bushing 3 is prevented. Simultaneously, guided by the guide bushing 4, the finished bushing 3 is smoothly pressed axially into the joint hole 7 of the part, completing the press-fitting process.

[0029] Other aspects of this utility model that are not detailed herein are all conventional techniques known to those skilled in the art.

[0030] It should be noted that the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A double bearing anti-rotation aircraft bushing press-in tool, comprising a bolt shaft (1), a finished bushing (3), a nut (6), characterized in that: It also includes a head flat ball bearing (2a), a tail flat ball bearing (2b), a guide bushing (4), and a handle sleeve (5); the head of the bolt shaft (1) is fitted with a head flat ball bearing (2a), a finished bushing (3), and a guide bushing (4) in sequence, and the tail of the bolt shaft (1) is fitted with a handle sleeve (5) and a tail flat ball bearing (2b) in sequence, and the end is threaded with a nut (6); one end face of the head flat ball bearing (2a) is in direct contact with the front end face of the finished bushing (3); the guide bushing (4) is in direct contact with the end of the finished bushing (3) and moves axially synchronously with it; the inner diameter of the handle sleeve (5) is larger than the outer diameter of the guide bushing (4).

2. A dual bearing anti-rotation aircraft bushing press tool according to claim 1, wherein: The head of the bolt shaft (1) is provided with a socket wrench adapter and an outer circular boss at the rear. The outer circular boss is close to the end face of the head flat ball bearing (2a).

3. A dual bearing anti-rotation aircraft bushing press tool according to claim 2, wherein: The end face of the head flat ball bearing (2a) completely covers the end face of the finished bushing (3).

4. A dual bearing anti-rotation aircraft bushing press tool according to claim 3, wherein: The guide bushing (4) is a stepped shaft structure, including a head end and a tail end. The outer diameter of the head end is the same as the outer diameter of the finished bushing (3), and the outer diameter of the tail end is smaller than the outer diameter of the head end.

5. A dual bearing anti-rotation aircraft bushing press tool according to claim 4, wherein: The outer diameter of the head end of the guide bushing (4) is smaller than the diameter of the hole (7) at the intersection of the parts joint, and the inner diameter of the handle (5) is larger than the outer diameter of the head end of the guide bushing (4).

6. A dual bearing anti-rotation aircraft bushing press tool according to claim 5, wherein: A washer is provided between the tail flat ball bearing (2b) and the nut (6).

7. A dual bearing anti-rotation aircraft bushing press tool according to claim 6, wherein: Both the head flat ball bearing (2a) and the tail flat ball bearing (2b) are made of stainless steel and have undergone nitriding treatment.

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