Cam bushing removal tool for double-ear parts and use method

Abstract

The present invention discloses a cam bushing removal tool for double-ear parts and a method of using the tool. The tool includes a rotating handle, a main shaft, a fixed handle, and a top piece. When removing the double-ear cam bushing, first pass the main shaft through the bushing and tighten the handle, install the top piece on the front end of the main shaft, and hold the tightening handle. When the top piece contacts the bushing, continue to rotate the handle to drive the main shaft to feed, so that the bushing is disengaged from the part hole, and the bushing can be quickly removed. The removal tool can reduce the difficulty of operation when the operator replaces the bushing and improve work efficiency. In addition, the structure is simple, the operation is fast and convenient, the required operating space is small, only one person is needed for the entire operation, and the operation process is safe and reliable, which can ensure the product quality after the bushing is removed.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft assembly, and in particular relates to a cam bushing removal tool for a double-ear type part used in an aircraft component assembly process and a use method thereof. Background Art

[0002] In the aircraft structure, there are many double-ear joint parts in the landing gear compartment, and the bushing and the double-ear joint are interference fit. Due to being in the external environment of flight for a long time, the cam bushing in the joint is severely rusted and worn. During the removal of the bushing, the lack of special tools increases the difficulty of replacing the bushing. Operators usually use one person to assist in holding the parts, and the other person uses a hammer and a pin to knock out the bushing. This operation is not only easy to injure the operator, but also causes great damage to the parts. When the cam bushing boss is on the outside of the double-ear part, the bushing cannot be knocked out, and it can only be removed by destroying the bushing through operations such as electrical cutting, which is inefficient. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a cam bushing removal tool and a method of use for double-ear parts, aiming to provide a removal method tool that is simple, reliable, and has low manufacturing cost, so as to solve the problems of difficult bushing disassembly and low efficiency in existing production conditions.

[0004] The patent of the present invention is realized through the following technical scheme: a cam bushing removal tool for double-ear parts, including a rotating handle, a main shaft, a fixed handle, and a top piece. The main shaft is a four-diameter stepped shaft, which is the first diameter section of the main shaft, the second diameter section of the main shaft, the third diameter section of the main shaft, and the fourth diameter section of the main shaft from top to bottom, and the diameters decrease successively. A through hole is provided in the center of the first diameter section of the main shaft, and the diameter of the through hole is the same as the diameter of the rotating handle, and the rotating handle is inserted therethrough. The diameter of the second diameter section of the main shaft is smaller than the inner diameter of the cam bushing, and an external thread matching the internal thread of the fixed handle is provided on the second diameter section. The diameter of the third diameter section of the main shaft is smaller than the second diameter section of the main shaft, and the fourth diameter section of the main shaft is provided with an external thread. There is a blind hole in the top of the top piece, and a thread is provided in the blind hole, which matches the fourth diameter section of the main shaft where the external thread is located.

[0005] Furthermore, the top piece is a stepped shaft, the front section has a diameter that is the same as the inner diameter of the cam bushing, and the rear section is provided with a cam bushing stop step, the diameter of which is larger than the inner diameter of the cam bushing.

[0006] Furthermore, the fixed handle is welded from a rectangular metal and a cylindrical metal, and the center of the cylindrical metal disk has a through hole, the diameter of the through hole is larger than the third diameter section of the main shaft and is the same as the fourth direct diameter section of the main shaft, and the inner wall of the through hole is provided with a thread, which cooperates with the second diameter section of the main shaft where the external thread is located to form a rotational relationship, and a step protrusion is provided around the cylindrical metal disk.

[0007] The method of removing two cam bushings in a double-ear part using a cam bushing removal tool includes the following steps:

[0008] 1 First, insert the rotating handle into the main shaft. The position of the handle is adjustable and can be used to drive the main shaft to rotate;

[0009] 2. Insert the front section of the ejector into the inner diameter of the first cam bushing in the double-eared part, and the ejector stopper is close to the edge of the first cam bushing. At the same time, the operator holds the fixed handle and places it between the two cam bushings of the double-eared part, with the raised step of the fixed handle facing the second cam bushing, so that the second cam bushing can be avoided during the tightening process;

[0010] 3. Hold the spindle with your other hand, insert the spindle from the outside of the second cam bushing, and pass the third diameter section of the spindle out of the fixed handle;

[0011] 4. Hold the fixed handle with one hand and keep it still. Use the other hand to continuously rotate the handle to drive the spindle to rotate, so that the fixed handle moves upward until the boss around the fixed handle abuts against the double-ear part, and at the same time, the fourth diameter section of the spindle and the top piece are connected to each other;

[0012] 5 When the boss around the fixed handle abuts against the double-eared part, the handle is rotated continuously, and the main shaft will drive the top piece to move toward the first cam bushing, and the first cam bushing will be disengaged from the double-eared part under the stop action of the stop step of the top piece;

[0013] 6 After the first cam bushing is taken out, remove the top piece from the main shaft, insert the front section of the top piece into the inner diameter of the second cam bushing in the binaural part, and the top piece stopper is close to the edge of the second cam bushing. At the same time, the operator holds the fixed handle and places it between the two cam bushings of the binaural part, with the raised step of the fixed handle facing the first cam bushing position in the binaural part;

[0014] 7 Hold the spindle with your other hand, insert the spindle from the other end of the double-ear part, and pass the third diameter section of the spindle out of the fixed handle;

[0015] 8. Hold the fixed handle with one hand and keep it still. Use the other hand to continuously rotate the handle to drive the spindle to rotate, so that the fixed handle moves upward until the boss around the fixed handle abuts against the double-ear part, and at the same time, the fourth diameter section of the spindle and the top piece are connected to each other;

[0016] 9 When the boss around the fixed handle is against the double-eared part, the handle is rotated continuously, and the main shaft will drive the top piece to move toward the second cam bushing, and the second cam bushing will be disengaged from the double-eared part under the stop action of the top piece stop step.

[0017] The beneficial effects of the present invention are:

[0018] 1) When removing the cam bushing of a double-eared part, first pass the spindle through the bushing and tighten the handle, install the top piece on the front end of the spindle, and hold the tightening handle. When the top piece contacts the bushing, continue to turn the handle to drive the spindle to feed, so that the bushing can be separated from the part hole, and the bushing can be quickly removed.

[0019] 2) The use of the removal tool can reduce the difficulty of replacing the bushing for operators and improve work efficiency.

[0020] 3) The use of the removal tool not only reduces the labor intensity of the operator, but also has a simple structure, fast and convenient operation, small required operating space, only one person is needed for the entire operation, and the operation process is safe and reliable, which can ensure the product quality after the bushing is removed.

[0021] The application is further described in detail below with reference to the accompanying drawings of the embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an isometric view of the tool described in the patent of this invention.

[0023] Figure 2 It is a schematic diagram of the method for removing the tool described in the patent of the present invention.

[0024] Figure 3 It is a structural cross-sectional schematic diagram of the tool removal method described in the patent of the present invention.

[0025] Explanation of numbers in the figure: 1-rotating handle, 2-main shaft, 3-fixed handle, 4-top piece, 5-first cam bushing, 6-second cam bushing, 7-double-ear part. DETAILED DESCRIPTION

[0026] In order to make the purpose and scheme of the patent of the present invention clearer, the technical scheme in the example of the present application is clearly described in detail in combination with the drawings in the specification of the example of the present application.

[0027] See also Figure 1-3As shown, the present invention provides a tool for removing a double-eared part cam bushing, comprising a rotating handle 1, a main shaft 2, a fixed handle 3, and a top piece 4. The main shaft 2 is a stepped shaft with four diameter sections, which are the first diameter section of the main shaft, the second diameter section of the main shaft, the third diameter section of the main shaft, and the fourth diameter section of the main shaft from top to bottom, and the diameters decrease successively. There is a through hole in the center of the first diameter section of the main shaft, and the diameter of the through hole is the same as the diameter of the rotating handle 1, and the rotating handle 1 is inserted therethrough. The diameter of the second diameter section of the main shaft is smaller than the inner diameter of the cam bushing, and the diameter section is provided with an external thread, and the fixed handle 3 is provided with an internal thread, which cooperates with the second diameter section of the main shaft where the external thread is located. The diameter of the third diameter section of the main shaft is smaller than the second diameter section of the main shaft, and the fourth diameter section of the main shaft is provided with an external thread. There is a blind hole in the top piece 4, and the blind hole is provided with a thread, which cooperates with the fourth diameter section of the main shaft where the external thread is located. The top piece 4 is a stepped shaft, the front section has the same diameter as the inner diameter of the cam bushing, and the rear section is provided with a cam bushing stop step, the diameter of which is slightly larger than the inner diameter of the cam bushing. The cam bushing will be disengaged from the double-eared part 7 under the top-stopping action of the stop step of the top piece 4. There is a blind hole in the rear end of the top piece 4, and there is a thread in the blind hole, which cooperates with the fourth diameter section of the main shaft where the external thread is located. The fixed handle 3 is welded from a rectangular metal and a cylindrical metal. There is a through hole in the center of the cylindrical metal disk. The diameter of the through hole is larger than the third diameter section of the main shaft and the same as the fourth direct diameter section of the main shaft. The inner wall of the through hole is provided with a thread, which cooperates with the second diameter section of the main shaft where the external thread is located to form a rotational relationship. Secondly, a step protrusion is provided around the cylindrical metal disk, which can avoid the second cam bushing 6 during the tightening process.

[0028] Using this workpiece to remove the cam bushing includes the following steps:

[0029] 1 First, insert the rotating handle 1 into the main shaft 2. The position of the rotating handle 1 is adjustable and can be used to drive the main shaft 2 to rotate;

[0030] 2 Insert the front section of the top piece 4 into the inner diameter of the first cam bushing 5 in the double-eared part 7, and the stopper of the top piece 4 is close to the edge of the first cam bushing 5. At the same time, the operator holds the fixed handle 3 and places it between the two cam bushings of the double-eared part 7, and places the stepped convex side of the fixed handle 3 toward the second cam bushing 6, so that the second cam bushing 6 can be avoided during the tightening process;

[0031] 3 Hold the main shaft 2 with the other hand, insert the main shaft 2 from the outside of the second cam bushing 6, and pass the third diameter section of the main shaft through the fixed handle 3;

[0032] 4. Hold the fixed handle 3 and keep it still. Use the other hand to continuously rotate the handle 1, driving the spindle 2 to rotate, so that the fixed handle 3 moves upward until the circumferential boss of the fixed handle 3 abuts against the double-ear part 7, and at the same time, the fourth diameter section of the spindle and the top part 4 are connected to each other.

[0033] When the circumferential boss of the fixed handle 3 abuts against the double-eared part 7, the handle 1 is continuously rotated, and the main shaft 2 drives the top part 4 to move toward the first cam bushing 5, and the first cam bushing 5 is disengaged from the double-eared part 7 under the stop action of the stop step of the top part 4;

[0034] 6 After the first cam bushing 5 is taken out, the top piece 4 is removed from the main shaft 2, and the front section of the top piece 4 is inserted into the inner diameter of the second cam bushing 6 in the binaural part 7, and the stopper of the top piece 4 is close to the edge of the second cam bushing 6. At the same time, the operator holds the fixed handle 3 and places it between the two cam bushings of the binaural part 7, and places the fixed handle 3 with the raised step facing the first cam bushing 5 in the binaural part;

[0035] 7 Hold the main shaft 2 with the other hand, insert the main shaft 2 from the other end of the double-ear part 7, and pass the third diameter section of the main shaft through the fixed handle 3;

[0036] 8 Hold the fixed handle 3 and keep it still, and use the other hand to continuously rotate the handle 1, driving the main shaft 2 to rotate, so that the fixed handle 3 moves upward until the circumferential boss of the fixed handle 3 abuts against the double-ear part 7, and at the same time, the fourth diameter section of the main shaft and the top part 4 are connected to each other;

[0037] When the circumferential boss of the fixed handle 3 abuts against the double-eared part 7, the handle 1 is continuously rotated, and the main shaft 2 drives the top member 4 to move toward the second cam bushing 6, and the second cam bushing 6 is disengaged from the double-eared part 7 under the stop action of the stop step of the top member 4.

[0038] In the description of this application, it should be noted that the implementation cases provided in the drawings are not within the entire scope of the protection required by the patent of this invention, but only represent a part of the structural form selected by the patent of this invention. Those skilled in the art can make various changes or improvements to the patent of this invention, and all other implementation cases obtained without making creative improvements are within the scope of protection of the patent application of this invention.

[0039] The patented structure of the present invention is simple, solves the problem of difficult disassembly during bushing replacement in the existing situation, improves the efficiency of bushing replacement and removal, can be widely used in aircraft component assembly and maintenance, and has certain promotion value.

Claims

1. A cam bushing removal tool for double-ear parts, characterized in that include: Turning handle, main shaft, fixed handle, top piece, the main shaft is a four-diameter stepped shaft, from top to bottom are the first diameter section of the main shaft, the second diameter section of the main shaft, the third diameter section of the main shaft, the fourth diameter section of the main shaft, the diameters decrease successively, a through hole is provided in the center of the first diameter section of the main shaft, the diameter of the through hole is the same as the diameter of the turning handle, the turning handle is inserted therein, the diameter of the second diameter section of the main shaft is smaller than the inner diameter of the cam bushing, the second diameter section is provided with an external thread matching the internal thread of the fixed handle, the diameter of the third diameter section of the main shaft is smaller than the second diameter section of the main shaft, the fourth diameter section of the main shaft is provided with an external thread, and there is A blind hole with a thread inside, which cooperates with the fourth diameter section of the main shaft where the external thread is located. The top piece is a stepped shaft, the diameter of the front section is the same as the inner diameter of the cam bushing, and the rear section is provided with a cam bushing stop step, whose diameter is larger than the inner diameter of the cam bushing. The fixed handle is welded from a rectangular metal and a cylindrical metal. There is a through hole in the center of the cylindrical metal disk. The diameter of the through hole is larger than the third diameter section of the main shaft and the same as the fourth direct diameter section of the main shaft. The inner wall of the through hole is provided with a thread, which cooperates with the second diameter section of the main shaft where the external thread is located to form a rotational relationship. A step protrusion is provided around the cylindrical metal disk.

2. A method for removing two cam bushings in a binaural part using the cam bushing removal tool for binaural parts according to claim 1, comprising the following steps: 2-1 First, insert the rotating handle into the main shaft. The position of the handle is adjustable and can be used to drive the main shaft to rotate; 2-2 Insert the front section of the ejector into the inner diameter of the first cam bushing in the double-eared part, and the ejector stopper is close to the edge of the first cam bushing. At the same time, the operator holds the fixed handle and places it between the two cam bushings of the double-eared part, with the raised side of the fixed handle facing the second cam bushing, so that the second cam bushing can be avoided during the tightening process; 2-3 Hold the spindle with your other hand, insert the spindle from the outside of the second cam bushing, and pass the third diameter section of the spindle out of the fixed handle; 2-4 Hold the fixed handle with one hand and keep it still. Use the other hand to continuously rotate the handle to drive the spindle to rotate, so that the fixed handle moves upward until the boss around the fixed handle abuts against the double-ear part, and at the same time, the fourth diameter section of the spindle and the top piece are connected to each other; 2-5 When the boss around the fixed handle abuts against the double-eared part, the handle is rotated continuously, and the main shaft drives the top piece to move toward the first cam bushing, and the first cam bushing is disengaged from the double-eared part under the stop action of the stop step of the top piece; 2-6 After the first cam bushing is taken out, remove the top piece from the main shaft, insert the front section of the top piece into the inner diameter of the second cam bushing in the binaural part, and the top piece stopper is close to the edge of the second cam bushing. At the same time, the operator holds the fixed handle and places it between the two cam bushings of the binaural part, with the raised step of the fixed handle facing the first cam bushing position in the binaural part; 2-7 Hold the spindle with your other hand, insert the spindle from the other end of the double-ear part, and pass the third diameter section of the spindle out of the fixed handle; 2-8 Hold the fixed handle with one hand and keep it still. Use the other hand to continuously rotate the handle to drive the spindle to rotate, so that the fixed handle moves upward until the boss around the fixed handle abuts against the double-ear part, and at the same time, the fourth diameter section of the spindle and the top part are connected to each other; 2-9 When the boss around the fixed handle is against the double-eared part, the handle is rotated continuously, and the main shaft will drive the top piece to move toward the second cam bushing, and the second cam bushing will be disengaged from the double-eared part under the stopping action of the top piece stop step.

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