KR200484987Y1

KR200484987Y1 - Rivetting device for aircraft body

Info

Publication number: KR200484987Y1
Application number: KR2020150002259U
Authority: KR
Inventors: 양재렬
Original assignee: 삼흥정공 주식회사
Priority date: 2015-04-09
Filing date: 2015-04-09
Publication date: 2017-11-15
Also published as: KR20160003603U

Abstract

The present invention relates to a device for riveting aircraft airframe components. The apparatus of the present invention comprises: a frame (F) having an upper frame and a lower frame; A hydraulic cylinder (14) having a hydraulic booster (12) amplified by pneumatic pressure and having a cylinder rod (16) linearly reciprocating in the horizontal direction and supported by the frame; A cam rod 20 which performs a linear reciprocating motion in the same direction by the hydraulic cylinder and has a cam curved surface formed on the bottom surface and supported by the upper frame; A needle bearing provided at an upper end portion thereof can be moved downward due to rolling contact with the curved surface of the cam, and is supported so as to be movable in the vertical direction by the upper frame, and an upper jaw 52 for pressing the upper end of the rivet A vertically moving rod 30; A screw shaft 40 screwed to the lower frame and adjustable in a vertical direction, and a lower jaw 54 for supporting a lower end of the rivet at an upper end thereof; And a spring (34) interposed between the upper and lower moving rods and the upper frame to move the downwardly moved up and down moving rod upward.

Description

Technical Field [0001] The present invention relates to a riveting device for an aircraft airframe,

The present invention relates to an riveting device for an aircraft, and more particularly, to an riveting device for an aircraft, which is capable of providing sufficient pressure while having a compact size while converting a leftward / rightward motion into a vertical motion, To an adjustable riveting device for an aircraft airframe.

The airframe of the aircraft has many parts made by connecting several plates with rivets. It can be said that the riveting for forming such an aircraft airframe is practically carried out by a skilled person. However, it is more desirable to have a device having a condition such as a stroke for riveting and a most desirable force in practice.

Korean Patent No. 10-0915372 discloses a riveting device for a skins of a warping machine, but this is only a detailed description of a shooting device including a supply of rivets and a pneumatic machine. In other words, there is no technical proposal regarding the mechanical construction for pressing the rivet.

In the case of riveting a plate-like member forming the airframe of an aircraft, riveting is preferably carried out with a constant force and with a constant stroke. And it is expected that such a riveting device can be more advantageously practically miniaturized.

The object of the present invention is to provide a device capable of riveting the aircraft airframe by optimally adjusting the distance between the upper jaw and the lower jaw as it is possible to rivet with a certain force .

Another object of the present invention is to provide a riveting device for a compact aircraft airframe.

The aircraft gas riveting apparatus of the present invention comprises: a frame having an upper frame and a lower frame; A hydraulic cylinder having a hydraulic booster amplified by pneumatic pressure and having a cylinder rod reciprocating linearly in a horizontal direction and supported by the frame; A cam rod that performs a linear reciprocating motion in the same direction by the hydraulic cylinder and has a cam curved surface formed on the bottom surface thereof and supported by the upper frame; A needle bearing provided at an upper end portion of the needle bar can be moved downward by rolling contact with the cam curved surface and is supported so as to be movable up and down by the upper frame, ; A screw shaft which is screwed to the lower frame and is adjustable in the vertical direction, and a lower jaw supporting the lower end of the rivet is installed at an upper end; And a spring interposed between the upper and lower moving rods and the upper frame to move the downwardly moved up and down moving rod upward.

The cam rod is preferably supported by a plurality of needle bearings rotatably supported on the upper frame such that the upper and lower surfaces thereof are in rolling contact with each other.

And a clamping means for holding the screw shaft screwed to the lower frame in a fixed position.

According to the present invention as described above, riveting is performed with a predetermined force and stroke by the up-and-down moving rod moving downward with the hydraulic cylinder as a power source. Therefore, it can be said that there is a merit that the rivetting with high reliability of the product becomes possible.

Further, by installing the hydraulic cylinder in the horizontal direction, it is possible to lower the overall height of the apparatus, and it is also expected that a compact apparatus can be provided. In addition, since the vertical height of the screw shaft can be easily adjusted, it is easy to control the height of the riveting space where the riveting is practically performed.

In the present invention, since a component reciprocating in the left and right horizontal directions is held in rolling contact by a needle bearing, a riveting device is realized that minimizes wear and damage based on the noise while minimizing noise.

1 is a side view of the inventive device;
2 is a front view of the inventive device;
3 is an enlarged view of the upper part of the inventive device;
4 is an enlarged view of the lower part of the inventive device;

Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. As shown in FIGS. 1 and 2, the riveting apparatus of the present invention includes a frame F fixed on a table T having a predetermined height, Is moved in the vertical direction toward the lower jaw 54 to press the rivet.

The frame F is provided on the table T and a plurality of foot switches FS are provided on the table T. A solenoid valve S ) Are also installed. The foot switch FS is for allowing a pneumatic pressure supplied from a pneumatic source (compressor) AC to be distributed by a solenoid valve S, for example. For example, when the first foot switch FSa is turned on, the solenoid valve S causes the air pressure (compressed air) supplied from the air pressure source AC to flow through the first path La, When the switch FSc is turned on, the solenoid valve S causes the pneumatic pressure supplied from the pneumatic source AC to be supplied through the second path Lb. When the second foot switch FSb is turned on, the solenoid valve S S operate to stop the supply of air pressure.

The first path La is connected to the hydraulic booster 12 and the second path Lb is connected to the hydraulic cylinder 14. [ The hydraulic cylinder 14 has a connection path Lc connected to the hydraulic booster 12. It is a matter of course that the hydraulic cylinder 14 uses a hydraulic pressure to cause the cylinder rod 16 to linearly reciprocate. The hydraulic booster 12 functions to amplify the force of the hydraulic cylinder 14 by using a relatively weak pressure pneumatic pressure, which is known per se to the extent that various types are currently available on the market. By using such a hydraulic booster 12, the hydraulic cylinder 14 has sufficient force to provide up-down movement as described later.

3, which is an enlarged view of FIG. 2, will be described below. The cylinder rod 16, which performs a linear reciprocating motion in the horizontal direction by the hydraulic cylinder 14, directly or indirectly reciprocates the cam rod 20 linearly in the left and right directions. In the illustrated embodiment, the cylinder rod 16 is connected to the cam rod 20 via a connecting pin 17. By connecting the cylinder rod 16 and the cam rod 20 through the connecting pin 17, a certain amount of eccentricity can be provided, thereby sufficiently absorbing the tolerance in the horizontal direction. That is, it can be seen that there is a certain clearance between the connection pin 17 and the hole into which the connection pin is inserted (formed in the cylinder rod and the cam rod).

A cam curved surface 22 is formed on the bottom surface of the cam rod 20 according to the present invention and the cam curved surface 22 is for vertically moving the up and down moving rod 30 to be described later. That is, the lateral reciprocating motion of the cam rod 20 in the left-right direction can be said to be converted into the linear motion of the up-and-down moving rod 30 in the up-and-down direction.

A needle bearing 32 is rotatably supported at an upper end of the up-and-down moving rod 30, and the needle bearing 32 is brought into contact with the cam curved surface 22 of the cam rod 20. Therefore, when the cam rod 20 moves to the left in the drawing, the needle bearing 32 which is in contact with the cam curved surface 22 rotates itself (that is, while rolling with the cam curved surface 22) So that the moving rod 30 linearly moves downward.

It will be appreciated that the up-and-down moving rod 30 is supported so as to be movable up and down at an intermediate portion of the upper frame Fu forming part of the frame F. The lower end of the vertical movement rod 30, which moves up and down in the middle of the upper frame Fu, is provided with an upper jaw 52 for applying a force to the upper end of the rivet.

A spring 34 is interposed between the up-and-down moving rod 30 and the upper frame Fu. The spring 34 is for resiliently returning the vertically moving rod 30 moved downward by the cam curved surface 22 of the cam rod 20 back to its original position. That is, in the present invention, the up-and-down moving rod 30 moves in the vertical direction so as to generate a force pressing the upper end of the rivet. Downward movement of the up-down moving rod 30 is transmitted to the cam rod 20, And the upward movement of the up-and-down moving rod 30 is made by the spring 34.

Here, the cam rod 20, which performs the linear reciprocating movement in the left-right direction by the cylinder rod 16, is supported in a stable manner in the left-right direction by the upper frame Fu. The upper frame Fu is provided with a passage through which the cam rod 20 linearly moves in the left and right direction. A plurality of needle bearings 24b, which contact the upper surface of the cam rod 20, And a needle bearing 24a which is in contact with the bottom surface of the cam rod 20 is provided at a lower portion of the passage.

Therefore, when the cam rod 20 linearly moves in the lateral direction, it can be seen that it is guided by the upper needle bearing 24b and the lower needle bearing 24a. The fact that the cam rod 20 is guided by the plurality of needle bearings 24a and 24b on the upper and lower surfaces prevents the friction due to the substantial rolling contact, It can be seen that exercise is possible.

As can be seen from the above description, the cam rod 20 is linearly moved in the left-right direction by the cylinder rod 16 of the hydraulic cylinder 14. The cam rod 20 moves the up and down moving rod 30 downward by using the cam curved surface 22 and the needle bearing 32. [ The upward movement of the up-and-down moving rod 30 is performed by the resilient restoring force of the spring 34.

The provision of the hydraulic cylinder 14 in the horizontal direction as the driving source for providing the lateral movement is intended to prevent the height from becoming higher than necessary and to make the apparatus more compact.

As shown in Fig. 4, a screw shaft 40 screwed to the outer periphery of the lower frame Fd, which forms part of the frame F, is screwed. Therefore, when the screw shaft is rotated by holding the handle 42, which is the lower end of the screw shaft 40, the screw shaft 40 is raised or lowered. It can be seen that the height of the portion where the lower jaw 54 is supported can be adjusted by using the screw shaft 40 in the apparatus of the present invention. It will be able to cope with it sufficiently flexibly.

A fixed clamp 44 is provided at a central portion of the screw shaft 40 (immediately below the lower frame). The fixed clamp 44 may be provided so as to maintain a predetermined position of the screw shaft 40 more firmly.

The fixing clamp 44 may be constituted by, for example, a nut having a threaded inner periphery threaded (tapped), and further constituted by a pair of nuts having different directions of threading, The screw shaft 40 can be sufficiently fixed at a predetermined position by operating the screw shaft 40 so that the screw shaft 40 is in close contact with the bottom surface of the lower frame Fd.

At the upper end of the screw shaft 40, a lower jaw 54 for supporting the lower end of the rivet is provided. That is, the two plate materials to be riveted are preliminarily drilled and inserted between the upper jaw 52 and the lower jaw 54, so that the riveting process can be performed by the apparatus of the present invention .

Hereinafter, a process of performing riveting using the apparatus of the present invention will be briefly described. First, the two plates to be subjected to riveting are substantially drilled, and they are put between the upper jaw 52 and the lower jaw 54, and the rivets are manually engaged. When the user presses the first foot switch FSa in this state, the solenoid valve S supplies the compressed air through the first path La.

Therefore, the cylinder rod 16 of the hydraulic cylinder 14 having the force amplified by the hydraulic booster 12 moves to the left in the drawing. The cam rod 20 also performs a linear reciprocating movement in the same left direction where the up and down moving rod 30 having the needle bearing 32 in contact with the cam curved surface 22 of the cam rod 20 And moves downward. Therefore, the upper jaw 52 provided at the lower end of the vertical movement rod 30 presses the upper end of the rivet, and the lower end of the rivet is supported by the lower jaw 54.

By this process, the two plates forming the airframe of the aircraft can be riveted. When this process is completed, the third foot switch FSc is depressed so that the compressed air in the air pressure source AC flows through the second path La . By the air inflow in this direction, the hydraulic cylinder 14 operates in the reverse direction, and the cylinder rod 16 moves to the right in the figure. Therefore, the cam rod 20 which is in contact with the upper end of the vertically moving rod 30 also moves to the left.

At this time, as the force pressing the downward movement rod 30 downward is removed, the elastic restoring force of the spring 34 acts to move the up and down movement rod 30 upward, and the two upwardly- The plate will be able to be pulled out.

It will be appreciated that various modifications are possible to those of ordinary skill in the art within the scope of the basic technical idea of the present invention having the above-described constitution, and the scope of protection of the present invention is not limited to the scope of the appended utility model registration request And the like.

12 ..... Hydraulic booster
14 ..... Hydraulic cylinder
16 ..... cylinder rod
17 ..... Connection pin
20 ..... Camload
22 ..... cam curved surface
24a, 24b ..... Needle bearings
30 ..... Moving up and down
32 ...... Needle bearing
34 ..... spring
52 ..... Top Joo
54 ..... Hajo Joo
F ..... frame
Fd ..... subframe
Fu ..... upper frame
FS ..... Footswitch
T ..... table

Claims

A frame having an upper frame and a lower frame;
A hydraulic cylinder having a hydraulic booster amplified by pneumatic pressure and having a cylinder rod reciprocating linearly in a horizontal direction and supported by the frame;
A cam rod that performs a linear reciprocating motion in the same direction by the hydraulic cylinder and has a cam curved surface formed on the bottom surface thereof and supported by the upper frame;
A needle bearing provided at an upper end portion of the needle bar can be moved downward by rolling contact with the cam curved surface and is supported so as to be movable up and down by the upper frame, ;
A screw shaft which is screwed to the lower frame and is adjustable in the vertical direction, and a lower jaw supporting the lower end of the rivet is installed at an upper end; And
And a spring interposed between the upper and lower moving rods and the upper frame to move the downwardly moved up and down rod upward;
Wherein the cam rod is supported by a plurality of needle bearings rotatably supported on the upper frame such that the upper surface and the lower surface thereof are in rolling contact with each other.

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2. The riveting apparatus according to claim 1, further comprising a clamping means capable of maintaining a state in which the screw shaft screwed to the lower frame is stopped at a predetermined position.