Device for disassembling and assembling oil needle rod of undercarriage

Abstract

The utility model discloses an undercarriage oil needle rod dismounting device which comprises a driving connecting rod and a connecting sleeve head, the outer wall of the driving connecting rod is provided with a first thread and a second thread, the thread directions of the first thread and the second thread are opposite, and one end of an oil needle rod is provided with a first threaded hole matched with the first thread; the connecting sleeve head is installed on the piston rod, and a second threaded hole matched with the second thread is formed in the connecting sleeve head. By adopting a thread transmission method and utilizing the structure that the first thread and the second thread on the driving connecting rod are opposite in thread direction, the oil needle rod stably moves in the piston rod, the oil needle rod and the sealing ring are evenly stressed, impact on the oil needle rod and the sealing ring in the knocking assembly process is eliminated, product parts are protected, and the service life of the oil needle rod is prolonged. The mounting and dismounting efficiency of the oil needle rod is improved, and the rejection rate of products is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of aircraft parts processing, and in particular relates to a landing gear oil needle rod disassembly and assembly device. Background Art

[0002] In the aircraft landing gear, the oil needle rod equipped with a sealing ring is assembled in the piston rod, and the deformation of the sealing ring plays a sealing role between the oil needle rod and the piston rod. The industry generally uses a hammer to install and remove the oil needle rod by knocking the extension rod. This operation method is time-consuming and labor-intensive, and has low work efficiency. There are also some disassembly tools for disassembling and assembling the oil needle rod in the prior art. For example, Chinese patent CN210081595U discloses an aircraft landing gear oil needle disassembly and assembly device, which includes a fixed beam, two bushings, a push-pull rod, a connecting sleeve and a force nut; a through hole is provided in the middle of the fixed beam, and cylindrical heads are respectively provided at both ends to match the mounting holes of the connecting ears of the inner tube of the landing gear; the two bushings are respectively fixed at the two ends of the through hole, and the inner diameter is smaller than the diameter of the through hole; the push-pull rod passes through the through hole and the bushing, and a middle external thread is provided in the middle; one end of the connecting sleeve is connected to the through hole. The end of the push-pull rod facing the oil needle is fixedly connected, and the other end is used to be threadedly connected to the external thread head of the oil needle; when installing the oil needle, the force nut is threadedly connected to the middle external thread of the push-pull rod and rests on the bushing, and by turning the force nut, the push-pull rod can generate a pulling force to pull the oil needle, which can ensure the neutrality and stability of the oil needle during the disassembly and assembly process; when removing the oil needle, use a hammer to impact the end of the push-pull rod in the direction of the inner tube, and continuously push the oil needle toward the left end of the inner tube of the landing gear through the push-pull rod, and finally push the oil needle out of the inner tube of the landing gear.

[0003] The aircraft landing gear oil needle disassembly and assembly device of the above-mentioned patent requires manual use of a hammer to impact the push-pull rod. The force of manual knocking is not easy to standardize and control. Improper knocking will cause damage to the protective layer on the surface of the oil needle rod and deformation of the oil needle rod, resulting in scrapping. In addition, knocking can easily leave excess material in the piston rod cavity. The landing gear will have a shortened service life or even cause accidents during its service life due to the excess material, seriously affecting flight safety. Utility Model Content

[0004] The utility model aims to provide a landing gear oil needle rod disassembly and assembly device, which is used to solve the above problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a landing gear oil needle rod disassembly and assembly device, including a driving connecting rod and a connecting sleeve, the outer wall of the driving connecting rod is provided with a first thread and a second thread, the thread directions of the first thread and the second thread are opposite, and one end of the oil needle rod is provided with a first threaded hole adapted to the first thread; the connecting sleeve is installed on the piston rod, and the connecting sleeve is provided with a second threaded hole adapted to the second thread; when installing the oil needle rod, one end of the driving connecting rod passes through the connecting sleeve and abuts against the oil needle rod, and the driving connecting rod is extended into the piston rod by rotating the driving connecting rod, so that the driving connecting rod pushes the oil needle rod to move toward the inside of the piston rod; when disassembling the oil needle rod, one end of the driving connecting rod passes through the connecting sleeve and is threadedly connected with the first threaded hole of the oil needle rod through the first thread, and the second thread of the driving connecting rod is threadedly connected with the second threaded hole of the connecting sleeve, and the driving connecting rod is extended out of the piston rod by rotating the driving connecting rod in the opposite direction, so that the driving connecting rod moves toward the outside of the piston rod with the oil needle rod.

[0006] As an optional implementation of the above technical solution, a driving head is provided at one end of the driving connecting rod away from the first thread.

[0007] As an optional implementation of the above technical solution, a clamping hole is provided on the driving head, and the clamping hole is equipped with a handle rod.

[0008] As an optional implementation of the above technical solution, the driving connecting rod includes a first thread segment, a second thread segment and a driving segment connected in sequence, the first thread segment is provided with the first thread, the second thread segment is provided with the second thread, and the driving segment is provided with the driving head.

[0009] As an optional implementation of the above technical solution, the diameter of the driving segment is larger than the diameter of the second thread segment, and the diameter of the second thread segment is larger than the diameter of the first thread segment.

[0010] As an optional implementation of the above technical solution, the first thread segment, the second thread segment and the driving segment are integrally formed.

[0011] As an optional implementation of the above technical solution, the connecting sleeve is threadedly connected to the piston rod.

[0012] As an optional implementation of the above technical solution, the connecting sleeve includes a coaxially arranged upper connecting head and a lower connecting head, the upper connecting head is provided with the first threaded hole on the inner side, the lower connecting head is provided with a third threaded hole connected to the first threaded hole on the inner side, and the outer wall of the piston rod is provided with a third thread adapted to the third threaded hole.

[0013] As an optional implementation of the above technical solution, the upper connecting head is an external hexagonal connecting head, and the first threaded hole is arranged in the middle of the external hexagonal connecting head.

[0014] As an optional implementation of the above technical solution, the lower connecting head is a cylindrical connecting head, and the second threaded hole is arranged in the middle of the cylindrical connecting head.

[0015] The beneficial effects of the utility model are:

[0016] The utility model installs a connecting sleeve on the piston rod, and the driving connecting rod is threadedly connected with the connecting sleeve. The driving connecting rod has a first thread and a second thread with opposite thread directions. The first thread cooperates with the oil needle rod thread, and the second thread cooperates with the connecting sleeve thread. By rotating the driving connecting rod, the oil needle rod is stably installed on the piston rod or removed from the piston rod by utilizing the force exerted on the piston rod and the oil needle rod in opposite directions when the threads are screwed together. The utility model adopts a thread transmission method and utilizes the structure in which the first thread and the second thread on the driving connecting rod have opposite thread directions, so that the oil needle rod moves stably in the piston rod, and the oil needle rod and the sealing ring are evenly stressed, eliminating the impact on the oil needle rod and the sealing ring during knocking assembly, protecting product parts, improving the installation and disassembly efficiency of the oil needle rod, and reducing the product scrap rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a landing gear oil needle rod disassembly and assembly device in one embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a driving connecting rod in one embodiment of the utility model;

[0019] Figure 3 This is a schematic structural diagram of a connecting sleeve in one embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the installation of the oil needle rod in one embodiment of the utility model;

[0021] Figure 5 It is a schematic diagram of the installation of the oil needle rod in one embodiment of the utility model.

[0022] In the figure: 1-driving connecting rod; 2-connecting sleeve; 3-first thread; 4-second thread; 5-oil needle rod; 6-piston rod; 7-driving head; 8-clamping hole; 9-handle rod; 10-external hexagonal connector; 11-cylinder connector. DETAILED DESCRIPTION

[0023] like Figure 1-Figure 5As shown, this embodiment provides a landing gear oil needle rod disassembly and assembly device, including a driving connecting rod 1 and a connecting sleeve 2. The driving connecting rod 1 can be inserted into the piston rod 6 to move the oil needle rod 5. The outer wall of the driving connecting rod 1 is provided with a first thread 3 and a second thread 4. The thread directions of the first thread 3 and the second thread 4 are opposite. The first thread 3 is located at the bottom end of the driving connecting rod 1. The first thread 3 is used to connect the oil needle rod 5. The second thread 4 is located in the middle of the driving connecting rod 1. The second thread 4 is used to connect the connecting sleeve 2. One end of the oil needle rod 5 is provided with a first threaded hole adapted to the first thread 3. A fixed sleeve can also be provided on the oil needle rod 5. The fixed sleeve is provided with a first threaded hole adapted to the first thread 3. The design of the fixed sleeve does not change the structure of the oil needle rod 5.

[0024] The connecting sleeve 2 is mounted on the piston rod 6, and a second threaded hole matching the second thread 4 is provided on the connecting sleeve 2. The driving connecting rod 1 can pass through the connecting sleeve 2 and extend into the piston rod 6. Since the driving connecting rod 1 is threadedly connected to the connecting sleeve 2, when the driving connecting rod 1 rotates under the action of an external force, the driving connecting rod 1 can extend into or out of the piston rod 6.

[0025] When installing the oil needle rod 5, one end of the driving connecting rod 1 passes through the connecting sleeve 2 and abuts against the oil needle rod 5, and then the connecting sleeve 2 is installed on the piston rod 6. The driving connecting rod 1 is extended into the piston rod 6 by rotating the driving connecting rod 1 clockwise or counterclockwise. Since the rotation direction of the driving connecting rod 1 is the screw-out direction, the driving connecting rod 1 will not be screwed into the first threaded hole, but the end of the driving connecting rod 1 will abut against the oil needle rod 5. The driving connecting rod 1 is continuously rotated, so that the driving connecting rod 1 pushes the oil needle rod 5 to move toward the inside of the piston rod 6, and then the oil needle rod 5 is pushed into the appropriate position inside the piston rod 6.

[0026] When removing the oil needle rod 5, one end of the driving connecting rod 1 passes through the connecting sleeve 2 and is threadedly connected to the first threaded hole of the oil needle rod 5 through the first thread 3, and the second thread 4 of the driving connecting rod 1 is threadedly connected to the second threaded hole of the connecting sleeve 2, and then the connecting sleeve 2 is installed on the piston rod 6, and the driving connecting rod 1 is extended out of the piston rod 6 by rotating the driving connecting rod 1 in the reverse direction. Since the rotation direction of the driving connecting rod 1 is the screw-in direction, the driving connecting rod 1 and the oil needle rod 5 will not be separated, and the driving connecting rod 1 is continuously rotated, so that the driving connecting rod 1 moves with the oil needle rod 5 toward the outside of the piston rod 6, and then the oil needle rod 5 is moved out of the piston rod 6.

[0027] The utility model installs a connecting sleeve 2 on a piston rod 6, a driving connecting rod 1 is threadedly connected with the connecting sleeve 2, the driving connecting rod 1 has a first thread 3 and a second thread 4 with opposite thread directions, the first thread 3 is threadedly matched with an oil needle rod 5, and the second thread 4 is threadedly matched with the connecting sleeve 2. By rotating the driving connecting rod 1, the oil needle rod 5 is stably installed on the piston rod 6 or removed from the piston rod 6 by utilizing the force exerted on the piston rod 6 and the oil needle rod 5 in opposite directions when the threads are screwed together.

[0028] The utility model adopts a thread transmission method and utilizes the structure that the thread directions of the first thread 3 and the second thread 4 on the driving connecting rod 1 are opposite, so that the oil needle rod 5 moves smoothly in the piston rod 6, and the oil needle rod 5 and the sealing ring are evenly stressed, thereby eliminating the impact on the oil needle rod 5 and the sealing ring during knocking assembly, protecting product parts, improving the installation and disassembly efficiency of the oil needle rod 5, and reducing the product scrap rate.

[0029] like Figure 2 As shown, in order to facilitate driving the driving connecting rod 1 to rotate, a driving head 7 is provided at one end of the driving connecting rod 1 away from the first thread 3. Figure 1 As shown, preferably, a clamping hole 8 is provided on the driving head 7, and the clamping hole 8 is equipped with a handle rod 9. The handle rod 9 is inserted into the clamping hole 8, and the driving connecting rod 1 can be driven to rotate quickly and conveniently through the handle rod 9, thereby improving the operating efficiency.

[0030] The driving connecting rod 1 comprises a first thread segment, a second thread segment and a driving segment connected sequentially from bottom to top, the first thread segment is provided with the first thread 3, the second thread segment is provided with the second thread 4, the driving segment is provided with the driving head 7, and the driving head 7 is kept outside the piston rod 6, so that the handle rod 9 can drive the driving connecting rod 1 to rotate. The first thread segment, the second thread segment and the driving segment are integrally formed, preferably, the diameter of the driving segment is larger than the diameter of the second thread segment, and the diameter of the second thread segment is larger than the diameter of the first thread segment, so that the driving connecting rod 1 forms a step structure.

[0031] In this embodiment, the connecting sleeve 2 is threadedly connected to the piston rod 6. Figure 3 As shown, specifically, the connecting sleeve 2 includes an upper connecting head and a lower connecting head arranged coaxially, the inner side of the upper connecting head is provided with the first threaded hole, the inner side of the lower connecting head is provided with a third threaded hole connected to the first threaded hole, and the outer wall of the piston rod 6 is provided with a third thread adapted to the third threaded hole. Among them, the upper connecting head is an external hexagonal connecting head 10, and the first threaded hole is arranged in the middle of the external hexagonal connecting head 10. The lower connecting head is a cylindrical connecting head 11, and the second threaded hole is arranged in the middle of the cylindrical connecting head 11.

[0032] The method of using the landing gear oil needle rod disassembly and assembly device in the utility model is as follows:

[0033] like Figure 4 As shown, when the oil needle rod 5 needs to be installed, the oil needle rod 5 is pre-placed at the internal cone angle of the piston rod 6, one end of the driving connecting rod 1 is inserted into the piston rod 6 through the connecting sleeve 2, and the connecting sleeve 2 is fixed on the piston rod 6. The driving connecting rod 1 is rotated clockwise or counterclockwise by the handle rod 9 to move the driving connecting rod 1 toward the inside of the piston rod 6. Since the rotation direction of the driving connecting rod 1 is the screw-out direction, the driving connecting rod 1 will not be screwed into the first threaded hole of the oil needle rod 5, but the end of the driving connecting rod 1 will abut against the oil needle rod 5. The driving connecting rod 1 is continuously rotated by the handle rod 9, and the driving connecting rod 1 will push the oil needle rod 5 to move smoothly toward the inside of the piston rod 6 until the oil needle rod 5 is pushed to a suitable position.

[0034] like Figure 5 As shown, when the oil needle rod 5 needs to be removed, the driving connecting rod 1 is first screwed into the connecting sleeve 2 to an appropriate depth, and then the connecting sleeve 2 is placed on the end of the piston rod 6. The connecting sleeve 2 and the driving connecting rod 1 rotate at the same time. While the connecting sleeve 2 and the piston rod 6 are tightened, the driving connecting rod 1 will also be screwed into the first threaded hole of the oil needle rod 5. Then the piston rod 6 and the connecting sleeve 2 are kept fixed, and the driving connecting rod 1 is rotated in the opposite direction by the handle rod 9 to move the driving connecting rod 1 toward the outside of the piston rod 6. Since the rotation direction of the driving connecting rod 1 is the screw-in direction, the driving connecting rod 1 and the oil needle rod 5 will not be separated. The driving connecting rod 1 is continuously rotated by the handle rod 9, and the driving connecting rod 1 moves smoothly toward the outside of the piston rod 6 with the oil needle rod 5 until the oil needle rod 5 is close to the end of the piston rod 6. The connecting sleeve 2 is removed, and the oil needle rod 5 can be removed.

[0035] In the description of the present utility model, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be mechanically connected or electrically connected; may be directly connected or indirectly connected through an intermediate medium, may be the internal connection of two components or the interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood. In addition, the specific features, structures, etc. described in the embodiments are included in at least one embodiment. In the absence of mutual contradictions, those skilled in the art may combine the features of different embodiments. The scope of protection of the present utility model is not limited to the above-mentioned specific embodiments. According to the basic technical concept of the present utility model, the embodiments that can be associated with by ordinary technicians in this field without creative work all belong to the scope of protection of the present utility model.

Claims

1. A landing gear oil needle rod disassembly and assembly device, characterized in that: The invention comprises a driving connecting rod (1) and a connecting sleeve (2), wherein the outer wall of the driving connecting rod (1) is provided with a first thread (3) and a second thread (4), wherein the thread directions of the first thread (3) and the second thread (4) are opposite, and one end of an oil needle rod (5) is provided with a first threaded hole adapted to the first thread (3); the connecting sleeve (2) is mounted on a piston rod (6), and a second threaded hole adapted to the second thread (4) is provided on the connecting sleeve (2); when the oil needle rod (5) is installed, one end of the driving connecting rod (1) passes through the connecting sleeve (2) and abuts against the oil needle rod (5), and by rotating the driving connecting rod ( 1) The driving connecting rod (1) is extended into the piston rod (6), so that the driving connecting rod (1) pushes the oil needle rod (5) to move toward the inside of the piston rod (6); when removing the oil needle rod (5), one end of the driving connecting rod (1) passes through the connecting sleeve (2) and is threadedly connected to the first threaded hole of the oil needle rod (5) through the first thread (3), and the second thread (4) of the driving connecting rod (1) is threadedly connected to the second threaded hole of the connecting sleeve (2), and the driving connecting rod (1) is extended out of the piston rod (6) by rotating the driving connecting rod (1) in the reverse direction, so that the driving connecting rod (1) moves with the oil needle rod (5) toward the outside of the piston rod (6).

2. The landing gear oil needle rod disassembly and assembly device according to claim 1, characterized in that: A driving head (7) is provided at one end of the driving connecting rod (1) away from the first thread (3).

3. The landing gear oil needle rod disassembly and assembly device according to claim 2, characterized in that: The driving head (7) is provided with a clamping hole (8), and the clamping hole (8) is equipped with a handle rod (9).

4. The landing gear oil needle rod disassembly and assembly device according to claim 2, characterized in that: The driving connecting rod (1) comprises a first thread segment, a second thread segment and a driving segment which are connected in sequence, the first thread segment being provided with the first thread (3), the second thread segment being provided with the second thread (4), and the driving segment being provided with the driving head (7).

5. The landing gear oil needle rod disassembly and assembly device according to claim 4, characterized in that: The diameter of the driving segment is larger than the diameter of the second thread segment, and the diameter of the second thread segment is larger than the diameter of the first thread segment.

6. The landing gear oil needle rod disassembly and assembly device according to claim 4, characterized in that: The first thread segment, the second thread segment and the driving segment are integrally formed.

7. The landing gear oil needle rod disassembly and assembly device according to claim 1, characterized in that: The connecting sleeve (2) is threadedly connected to the piston rod (6).

8. The landing gear oil needle rod disassembly and assembly device according to claim 7, characterized in that: The connecting sleeve (2) comprises an upper connecting head and a lower connecting head which are coaxially arranged, the upper connecting head is provided with the first threaded hole on the inner side, the lower connecting head is provided with a third threaded hole which is connected with the first threaded hole on the inner side, and the outer wall of the piston rod (6) is provided with a third thread which is adapted to the third threaded hole.

9. The landing gear oil needle rod disassembly and assembly device according to claim 8, characterized in that: The upper connecting head is an external hexagonal connecting head (10), and the first threaded hole is arranged in the middle of the external hexagonal connecting head (10).

10. The landing gear oil needle rod disassembly and assembly device according to claim 8, characterized in that: The lower connecting head is a cylindrical connecting head (11), and the second threaded hole is arranged in the middle of the cylindrical connecting head (11).

Images