Special device for fixing airplane pull rod

Abstract

The utility model discloses a special device for fixing an airplane pull rod, which belongs to the technical field of aviation equipment and comprises a fixed base, a cover plate, a screw-in rod, a cam and a positioning pin, an arc-shaped through groove is formed in the fixed base and used for placing the pull rod, the positioning pin is arranged beside the fixed base, and the top end of the positioning pin is inserted into a rivet hole of the pull rod to fix one end of the pull rod. Arc-shaped through grooves are formed in the corresponding positions of the lower surface of the cover plate, the cover plate covers the fixed base and clamps the pull rod through the arc-shaped through grooves, the upper end of the fixed base is in threaded fit with the screw-in rod, a cam is fixed to the screw-in rod, and the screw-in rod is operated to rotate the cam to press the cover plate so as to clamp the pull rod. The fixing device is firm in fixation and convenient to operate, and operability of single-person assembly of the airplane pull rod is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of aviation equipment technology and relates to a special device for fixing aircraft tie rods. Background Technology

[0002] The aircraft control system is a crucial system for controlling the aircraft's flight attitude, playing a vital role in flight. This system is primarily used by the pilot to perform actions such as yaw, pitch, and roll to control the aircraft's attitude. Its proper functioning directly determines the aircraft's safe flight. Control sticks vary in size and are numerous, distributed throughout various parts and systems of an aircraft, with the control system having the most and being the most typical. Control sticks also require significant maintenance, making maintenance a heavy task. Control sticks are the main transmission components of the aircraft control system, and their role cannot be underestimated. During use, control sticks are hinged to components such as rocker arms, support arms, levers, or supports to transmit displacement or provide fixation. (See the control stick assembly drawing for a certain type of aircraft.) Figure 1 It mainly consists of an adjustable earring connector, a fork connector, a nut, a spring rod, etc., and has rivet holes.

[0003] When assembling the tie rod, the rivet holes must first be positioned, then the tie rod is fixed, and finally, the rivet holes are worked on. The current method involves fixing a positioning tool to a vise, aligning the tie rod's rivet holes with the positioning tool, and having another person manually hold the other end of the tie rod in place before proceeding to the next step. The disadvantages of this method include: the positioning tool is a general-purpose, somewhat crude tool; there is a lack of specialized tooling for fixing the tie rod; two people operating the tool are time-consuming and labor-intensive, and in some cases, this can even cause injury to the fixing personnel, posing a certain risk; the fixing force is not strong enough, causing wobbling during the next step, affecting assembly quality and delaying production. Therefore, a specialized fixing device is urgently needed to meet the fixing requirements of aircraft tie rod assembly, thereby freeing up manpower, improving quality, and eliminating potential hazards. Utility Model Content

[0004] In view of this, the present invention provides a special device for fixing aircraft struts, which is used for aircraft strut assembly, eliminates safety hazards, improves assembly efficiency, improves repair quality, and saves repair costs.

[0005] The present invention adopts the following technical solution:

[0006] A special device for fixing aircraft struts includes a fixing base 1, a cover plate 2, a screw rod 3, a pin 4, a key 5, a cam 6, and a positioning pin 7.

[0007] The upper part of the fixed base 1 is a flat plate with an arc-shaped through groove on its upper surface. There are upright plates on both sides of the arc-shaped through groove. The upper part of the upright plates has coaxial threaded holes. The lower part of the fixed base 1 is a column for clamping in a vise. The middle part of the column has a strip-shaped platform that is parallel to the arc-shaped through groove and longer than the arc-shaped through groove. The end of the strip-shaped platform has a threaded hole. The axis of the threaded hole is coplanar with the axis of the arc-shaped through groove.

[0008] The positioning pin 7 has an external thread that engages with the threaded hole on the strip platform of the fixed base 1. Its top end is inserted into the rivet hole of the pull rod for positioning, and its top end is at the same height as the axis of the pull rod placed on the fixed base 1 to prevent the pull rod from twisting and deforming. The positioning pin 7 can be adjusted in height to accommodate pull rods of different sizes.

[0009] The cover plate 2 has parallel through slots at both ends. The cover plate 2 covers the fixed base 1, and the upright plates on both sides of the fixed base 1 pass through the two through slots respectively. The two slide together to limit the position of the cover plate 2. The lower surface of the cover plate 2 also has an arc-shaped through slot, which cooperates with the arc-shaped through slot on the fixed base 1 to clamp the pull rod.

[0010] The screw rod 3 is a threaded rod that passes through the threaded holes on the two upright plates of the fixed base 1 and is threadedly engaged. One end of the screw rod has a handle, and the other end has a pin 4 to prevent the screw rod 3 from falling off. The screw rod 3 has two grooves in the middle, each of which is embedded with a key 5.

[0011] The cam 6 is an elliptical plate with a through hole at one end along its long axis and a groove on one side edge of the through hole. The diameter of the through hole is set according to the outer diameter of the screw rod 3. Two cams 6 with the same structure are provided and pass through the screw rod 3. The two keys 5 on the screw rod 3 are embedded in the grooves on the two cams to fix the cams 6 on the screw rod 3. The two cams are installed at the same angle. By rotating the screw rod 3, the end of the cam 6 away from the screw rod 3 presses against the cover plate 2 to achieve the clamping of the pull rod. The eccentric rotation of the cam 6 can conveniently and quickly fix pull rods of various diameters.

[0012] Furthermore, the fixed base 1, cover plate 2, screw rod 3, cam 6, and positioning pin 7 are all made of No. 45 steel, which has high strength and is not easily deformed.

[0013] Furthermore, the arc-shaped grooves on the fixed base and cover plate are glued with a layer of felt to protect the clamping part of the pull rod from damage.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model is a modular assembly that is securely fixed and easy to operate, enabling single-person assembly of aircraft control rods.

[0016] 2. This utility model uses an arc-shaped groove structure to clamp the pull rod, and can achieve clamping of pull rods of different diameters by rotating and pressing the cover plate with the cam, so as to assemble them.

[0017] 3. The fixed base, positioning pin and cover plate axis of this utility model are located on the same plane, so that the tie rod will not be torsional or deformed when it is fixed, thus ensuring the maintenance quality of the aircraft tie rod. It is applicable not only to tie rod assembly but also to tie rod disassembly. Attached Figure Description

[0018] Figure 1 Assembly drawing of a certain type of aircraft pull rod;

[0019] Figure 2 This is an overall rendering of the present invention;

[0020] Figure 3 This is an assembly diagram of the present invention;

[0021] Figure 4 This is a schematic diagram of a fixed base, where (a) is the front view and (b) is the side view;

[0022] Figure 5 This is a schematic diagram of a positioning pin;

[0023] Figure 6 This is a schematic diagram of the cover plate, where (a) is a sectional view and (b) is a top view;

[0024] Figure 7 This is a schematic diagram of the screw-in rod, where (a) is the front view and (b) is the side view;

[0025] Figure 8 The diagram shows a cam, where (a) is the front view and (b) is the side sectional view.

[0026] The components include: 1. fixed base; 2. cover plate; 3. screw rod; 4. pin; 5. key; 6. cam; and 7. positioning pin. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below.

[0028] A special device for fixing aircraft struts, such as Figure 2 As shown in Figure 3, it includes a fixed base 1, a cover plate 2, a screw rod 3, a pin 4, a key 5, a cam 6, and a positioning pin 7.

[0029] like Figure 4 As shown, the upper part of the fixed base 1 is a flat plate with an arc-shaped through groove on its upper surface. There are upright plates on both sides of the arc-shaped through groove. The upper part of the upright plates has coaxial threaded holes. The lower part of the fixed base 1 is a column for clamping in a vise. The middle part of the column has a strip-shaped platform that is parallel to the arc-shaped through groove and longer than the arc-shaped through groove. The end of the strip-shaped platform has a threaded hole. The axis of the threaded hole is coplanar with the axis of the arc-shaped through groove.

[0030] like Figure 5 As shown, the positioning pin 7 has an external thread that engages with the threaded hole on the strip platform of the fixed base 1. Its top end is inserted into the rivet hole of the pull rod for positioning, and its top end is at the same height as the axis of the pull rod placed on the fixed base 1 to prevent the pull rod from twisting and deforming. The positioning pin 7 can be adjusted in height to accommodate pull rods of different sizes.

[0031] like Figure 6 As shown, the cover plate 2 has parallel through slots at both ends. The cover plate 2 covers the fixed base 1, and the upright plates on both sides of the fixed base 1 pass through the two through slots respectively. The two slide together to limit the position of the cover plate 2. The lower surface of the cover plate 2 also has an arc-shaped through slot, which cooperates with the arc-shaped through slot on the fixed base 1 to clamp the pull rod.

[0032] like Figure 7 As shown, the screw rod 3 is a threaded rod that passes through the threaded holes on the two upright plates of the fixed base 1 and is threadedly engaged. One end of the screw rod has a handle, and the other end has a pin 4 to prevent the screw rod 3 from falling off. The screw rod 3 has two grooves in the middle, each of which is embedded with a key 5.

[0033] like Figure 8 As shown, the cam 6 is an elliptical plate with a through hole at one end along its long axis and a groove on one side edge of the through hole. The diameter of the through hole is set according to the outer diameter of the screw rod 3. Two cams 6 with the same structure are provided and pass through the screw rod 3. The two keys 5 on the screw rod 3 are embedded in the grooves on the two cams to fix the cams 6 on the screw rod 3. The two cams are installed at the same angle. By rotating the screw rod 3, the end of the cam 6 away from the screw rod 3 presses against the cover plate 2 to achieve the clamping of the pull rod. The eccentric rotation of the cam 6 can conveniently and quickly fix pull rods of various diameters.

[0034] The fixed base 1, cover plate 2, screw rod 3, cam 6, and positioning pin 7 are all made of No. 45 steel, which has high strength and is not easily deformed.

[0035] The working process is as follows: clamp the lower end of the fixed base 1 with a vise, align the positioning pin 7 with the rivet hole on the pull rod and insert it to support one end of the pull rod, place the pull rod in the arc-shaped through groove of the fixed base 1, and adjust the height of the positioning pin 7 to make the axis of the pull rod horizontal; then cover the pull rod with the cover plate 2, and the axes of the fixed base 1, positioning pin 7 and cover plate 2 are on the same plane, which can ensure that the pull rod is located in the middle of the arc-shaped through groove of the fixed base 1 and cover plate 2; rotate the screw rod 3 to make the elliptical cam 6 press the cover plate 2, thereby clamping and fixing the pull rod, and then assemble the pull rod.

[0036] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A special device for fixing aircraft struts, characterized in that, Includes a fixed base (1), a cover plate (2), a screw rod (3), a key (5), a cam (6), and a positioning pin (7); The upper part of the fixed base (1) is a flat plate with an arc-shaped through groove on the upper surface. There are upright plates on both sides of the arc-shaped through groove. The upper part of the upright plates has a coaxial threaded hole. The lower part of the fixed base (1) is a column for clamping on a vise. The middle part of the column has a strip-shaped platform that is parallel to the arc-shaped through groove and longer than the arc-shaped through groove. The end of the strip-shaped platform has a threaded hole. The axis of the threaded hole is coplanar with the axis of the arc-shaped through groove. The positioning pin (7) has an external thread that is threaded into the threaded hole on the strip platform of the fixed base (1). Its top end is inserted into the rivet hole of the pull rod for positioning, and its top end is at the same height as the axis of the pull rod placed on the fixed base (1). The positioning pin (7) can be adjusted in height to accommodate pull rods of different sizes. The cover plate (2) has parallel through slots at both ends. The cover plate (2) covers the fixed base (1), and the upright plates on both sides of the fixed base (1) pass through the two through slots respectively. The two slide together to limit the cover plate (2). The lower surface of the cover plate (2) also has an arc-shaped through slot, which cooperates with the arc-shaped through slot on the fixed base (1) to clamp the pull rod. The screw rod (3) is a threaded rod that passes through the threaded holes on the two vertical plates of the fixed base (1) and is threadedly engaged. The cam (6) is an elliptical plate with a through hole at one end along its long axis. The diameter of the through hole is set according to the outer diameter of the screw rod (3). The cam (6) is fixed in the middle of the screw rod (3). By rotating the screw rod (3), the cam (6) is rotated eccentrically. The end of the cam (6) away from the screw rod (3) is used to press the cover plate (2).

2. The special device for fixing aircraft tie rods according to claim 1, characterized in that, A pin (4) is provided at one end of the screw-in rod (3) to prevent the screw-in rod (3) from falling off.

3. The special device for fixing aircraft tie rods according to claim 1, characterized in that, The screw rod (3) has a groove in the middle, and a key (5) is embedded in the groove. The cam (6) has a groove on one side edge of the through hole, which cooperates with the groove installed on the screw rod (3) to fix the cam (6).

4. A special device for fixing aircraft struts according to claim 1 or 3, characterized in that, The cam (6) has two identical structures and is installed at the same angle.

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