Composite plug quick installation tool and installation method

Abstract

This invention provides a quick-installation tool and method for composite plugs. The positioning sleeve utilizes the three limiting surfaces formed by its limiting groove, the stepped cylindrical part at the bottom, and the annular limiting stepped surface, in conjunction with the positioning rod and its boss, to ensure both the interference fit between the cone plug and the plug sleeve and to ensure that the plug sleeve is not cracked by the cone plug, which can effectively improve assembly efficiency and quality.

Description

Technical Field

[0001] This invention belongs to the field of electro-hydraulic servo valve assembly technology for aero-engines, and in particular relates to a quick-installation tool and method for a composite plug. Background Technology

[0002] In the past, the assembly of composite plugs for electro-hydraulic servo valve housings in aero-engines was inefficient and had a low assembly pass rate. Furthermore, due to the thin wall thickness of the composite plug sleeve, the sleeve was prone to cracking when pressed into the housing mounting hole 100mm and when the conical plug was pressed into the sleeve sleeve. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention provides the following technical solution:

[0004] A quick-installation tool for composite plugs, comprising:

[0005] The positioning rod is a cylinder of equal diameter, with a boss fixed on one side of the axial center.

[0006] The positioning sleeve has a cylindrical hole that slides with the positioning rod, and the diameter of the cylindrical hole is sufficient for the tapered plug to slide within the cylindrical hole; the upper cylindrical wall has a limiting groove that communicates with the cylindrical hole, and the opening of the limiting groove makes the remaining end face of the top opening of the positioning sleeve form a first limiting surface, the limiting groove itself forms a second limiting surface and a third limiting surface, and the height of the first, second and third limiting surfaces decreases sequentially; the bottom end of the positioning sleeve has a stepped cylindrical part and an annular limiting stepped surface;

[0007] The cylinder between the limiting step surface and the third limiting surface has a feeding window that communicates with the cylinder hole and allows the cone plug to be inserted;

[0008] The positioning sleeve also has an annular rubber ring mounting groove on the inner wall of the cylinder hole below the feeding window. A limiting rubber ring is installed in the rubber ring mounting groove. The limiting rubber ring forms an annular elastic limiting protrusion on the inner wall of the cylinder hole. The distance between the limiting rubber ring and the feeding window is such that when the cone plug is inserted into the cylinder hole, the lower chamfer of the cone plug is supported by the limiting rubber ring, and the upper end of the cone plug can be observed from the feeding window to ensure that the lower end of the positioning rod faces the upper end face of the cone plug under positive pressure.

[0009] When the boss of the positioning rod presses against the third limiting surface in the positioning sleeve, part of the lower end of the positioning rod protrudes from the bottom end face of the positioning sleeve.

[0010] Furthermore, the upper end face of the positioning rod is dome-shaped.

[0011] Furthermore, the lower end of the positioning rod is provided with a lower protruding pin that protrudes vertically downward along the axis for inserting a vent hole for inserting a cone plug.

[0012] Furthermore, the first, second, and third limiting surfaces are arranged sequentially around the axis of the cylinder hole.

[0013] Furthermore, the transition surfaces between the first and second limiting surfaces, and between the second and third limiting surfaces, are all vertical surfaces parallel to the axis of the positioning rod body.

[0014] Furthermore, the first limiting surface has a surrounding angle of 180 degrees, while the second and third limiting surfaces each have a surrounding angle of 90 degrees.

[0015] Furthermore, it can be observed from the feed window to ensure that the lower protrusion of the positioning rod is aligned with the vent hole of the inserted cone plug.

[0016] The present invention also provides a method for quick installation of composite plugs, using the quick installation tool for composite plugs as described above.

[0017] Furthermore, including:

[0018] Step 1: Pre-install the plug sleeve into the housing mounting hole: Move the positioning rod, which is fitted into the positioning sleeve, downwards until its boss and the third limiting surface press against each other. Place the plug sleeve on the lower end of the positioning rod that is exposed at the bottom of the positioning sleeve, and make the upper end face of the plug sleeve abut against the lower end face of the stepped cylindrical part of the positioning sleeve. This ensures that the plug sleeve can remain coaxial with the positioning rod and the positioning sleeve during the pre-installation pressing process, and the lower end face of the stepped cylindrical part transmits the downward pressure on the plug sleeve. After aligning the plug sleeve with the housing mounting hole, press down the positioning sleeve and the positioning rod simultaneously. First, press the plug sleeve into the housing mounting hole as a whole. Then, while aligning the stepped cylindrical part of the positioning sleeve with the housing mounting hole, continue to press down the plug sleeve and keep the plug sleeve coaxial with the housing mounting hole until the limiting stepped surface of the positioning sleeve abuts against the upper surface of the housing.

[0019] Step 2: Pull the positioning rod upward and rotate it until the boss abuts against the first limiting surface of the positioning sleeve, so that the positioning rod avoids the feeding window of the positioning sleeve. Insert the cone plug feeding window into the cylinder hole of the positioning sleeve, and the limiting rubber ring supports and prevents the cone plug from sliding down. Rotate the positioning rod so that its boss is disengaged from the first limiting surface to directly above the second limiting surface. Press the positioning rod down until it abuts against the second limiting surface of the positioning sleeve, thereby pressing down the cone plug so that its chamfered part breaks through the supporting limit of the limiting rubber ring and is pressed into the plug sleeve without deflection.

[0020] Step 3: Rotate the positioning rod so that its boss is disengaged from the second limiting surface to directly above the third limiting surface. Press the positioning rod down until it abuts against the third limiting surface of the positioning sleeve, so that the cone plug is pressed into the qualified position inside the plug sleeve, completing the quick installation of the composite plug. Then, pull out the positioning rod and the positioning sleeve together.

[0021] In step one, a small adaptive adjustment allowance is reserved between the lower end of the plug and the lower end of the housing mounting hole.

[0022] The composite plug quick installation tool used in this invention has a simple structure, low manufacturing and maintenance costs, reliable performance, and saves the assembly time of pressing the composite plug into the shell. The plug sleeve is pressed in by positioning sleeve 2 and the cone plug is pressed in by positioning rod 1, so as to quickly assemble the composite plug in one go, reduce production preparation time and processing time, thereby saving costs.

[0023] The depth of the plug being pressed into the housing is controlled by the stepped cylindrical part and the limiting stepped surface of the positioning sleeve. The boss of the positioning rod cooperates with the three limiting surfaces of the positioning sleeve limiting groove, which not only limits the pressing depth of the cone plug and ensures the interference fit between the cone plug and the plug sleeve, but also ensures that the plug sleeve is not cracked by the cone plug, which can effectively improve assembly efficiency and quality. Attached Figure Description

[0024] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional schematic diagram of the positioning rod;

[0026] Figure 2 A three-dimensional schematic diagram of the positioning sleeve;

[0027] Figure 3 A three-dimensional schematic diagram of one of the combined states of the positioning rod and the positioning sleeve;

[0028] Figure 4 A top view of one of the combined states of the positioning rod and positioning sleeve;

[0029] Figure 5 This is a diagram illustrating the installation process.

[0030] The reference numerals in the figure are: 1. Positioning rod; 2. Positioning sleeve; 3. Limiting rubber ring; 4. Conical plug; 5. Plug; 100mm mounting hole in the housing.

[0031] 11. Boss; 12. Dome surface; 13. Lower protrusion;

[0032] Cylinder hole 21; limiting groove 22; first limiting surface 231; second limiting surface 232; third limiting surface 233; feed window 24; rubber ring mounting groove 25; stepped cylinder 26; limiting stepped surface 261;

[0033] Conical plug 4; vent hole 41; plug sleeve 5. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] The composite plug quick installation tool of the present invention includes a positioning rod 1, a positioning sleeve 2, and a limiting rubber ring 3;

[0037] like Figure 1 As shown, the main body of the positioning rod 1 is a cylinder of equal diameter, and a boss 11 is fixed on one side of its axial center.

[0038] Preferred, such as Figure 1 , Figure 3 and Figure 5 As shown, the upper end face 12 of the positioning rod is dome-shaped;

[0039] Preferred, such as Figure 5 As shown, the lower end of the positioning rod 1 is provided with a lower protruding pin 13 that protrudes vertically downward along the axis. The lower protruding pin 13 is used to cooperate with the vent hole 41 of the cone plug 4. By inserting the lower protruding pin 13 into the vent hole 41 of the cone plug 4, it is convenient to temporarily connect them coaxially, and to keep the cone plug 4 and the cylinder of the positioning rod 1 coaxial during the subsequent insertion process.

[0040] like Figure 2 As shown, the positioning sleeve 2 has a cylindrical hole 21 that can slide with the positioning rod 1. The diameter of the cylindrical hole 21 is such that the tapered plug 4 can be fitted into and slide within the cylindrical hole. The upper cylindrical wall has a limiting groove 22 that communicates with the cylindrical hole 21. The opening of the limiting groove 22 causes the remaining end face of the top opening of the positioning sleeve 2 to form a first limiting surface 231. The limiting groove 22 below the first limiting surface 231 itself forms a second limiting surface 232 and a third limiting surface 233. The heights of the first, second, and third limiting surfaces decrease sequentially. Preferably, they are arranged counterclockwise along the axis of the cylindrical hole 21. This arrangement saves the most space and ensures that the positioning sleeve 2 and its three limiting surfaces have high strength to support the limiting boss 11 and its corresponding positioning rod 1.

[0041] Preferred, such as Figure 2 and Figure 3 As shown, the transition surfaces between the first limiting surface 231 and the second limiting surface 232, and between the second limiting surface 232 and the third limiting surface 233, are all vertical surfaces parallel to the axis of the main body of the positioning rod 1.

[0042] Preferred, such as Figure 4 As shown, the first limiting surface 231 has a surrounding angle of 180 degrees, while the second limiting surface 232 and the third limiting surface 233 each have a surrounding angle of 90 degrees. These structural features together achieve space saving and ensure that the positioning sleeve 2 and its three limiting surfaces have high strength to support the limiting boss 11 and its associated positioning rod 1.

[0043] The bottom end of the positioning sleeve 2 is formed with a stepped cylindrical portion 26 and an annular limiting stepped surface 261;

[0044] The cylinder between the limiting step surface 261 and the third limiting surface 233 has a feed window 24 that communicates with the cylinder hole 21 and allows the cone plug 4 to be inserted into the cylinder hole 21.

[0045] The positioning sleeve 2 also has an annular rubber ring mounting groove 25 on the inner wall of the cylinder hole 21 below the feeding window 24. A limiting rubber ring 3 is installed in the rubber ring mounting groove 25. The limiting rubber ring 3 forms an annular elastic limiting protrusion on the inner wall of the cylinder hole 21. The distance between the limiting rubber ring 3 and the feeding window 24 is such that when the cone plug 4 is inserted into the cylinder hole 21, the lower chamfer of the cone plug 4 is supported by the limiting rubber ring 3. The upper end of the cone plug 4 can be observed from the feeding window 24 to ensure that the lower end face of the positioning rod 1 is in positive pressure against the upper end face of the cone plug 4. Furthermore, it can be observed from the feeding window 24 to ensure that the lower protrusion 13 of the positioning rod 1 is aligned with the exhaust hole 41 inserted into the cone plug 4.

[0046] Furthermore, when the positioning rod 1 is inserted downward into the positioning sleeve 2 until its boss 11 presses against the third limiting surface 233, a portion of the lower end of the positioning rod 1 is exposed on the bottom end face of the positioning sleeve 2. In this state, the exposed positioning rod 1 can be used to install the plug sleeve 5 in the early stage so that the plug sleeve 5 can be aligned and pre-installed into the housing mounting hole 100. In addition, when the cone plug 4 is pressed into the plug sleeve 5, since a portion of the lower end of the positioning rod 1 is exposed, it also facilitates the smooth progress of the installation process and helps to ensure that the plug sleeve is not stretched by the cone plug.

[0047] Installation method:

[0048] First, using this installation tool, pre-install the plug sleeve 5 into the housing mounting hole 100: move the positioning rod 1, which is fitted onto the positioning sleeve 2, downwards until its boss 11 presses against the third limiting surface 233, limiting the position. A portion of the lower end of the positioning rod 1 protrudes from the bottom end face of the positioning sleeve 2. Place the plug sleeve 5 onto the lower end of the positioning rod 1 protruding from the bottom end of the positioning sleeve 2, and ensure that the upper end face of the plug sleeve 5 abuts against the lower end face of the stepped cylindrical portion 26 of the positioning sleeve 2, thereby ensuring that the pre-installed plug sleeve 5 is pressed down. During the process, the positioning sleeve 5 is kept coaxial with the positioning rod 1 and the positioning sleeve 2, and the lower end face of the stepped cylindrical part 26 provides downward pressure on the plug sleeve 5. After aligning the plug sleeve 5 with the housing mounting hole 100, the positioning sleeve 2 and the positioning rod 1 are pressed down simultaneously. First, the plug sleeve 5 is pressed into the housing mounting hole 100 as a whole. Then, during the process of aligning the stepped cylindrical part 26 of the positioning sleeve 2 with the housing mounting hole 100, the plug sleeve 5 is pressed down while maintaining the coaxiality of the plug sleeve 5 with the housing mounting hole 100 (e.g., ...). Figure 5As shown in Figure A), the pre-installation of the plug sleeve 5 is completed when the limiting step surface 261 of the positioning sleeve 2 abuts against the upper surface of the housing. Through the joint cooperation of the exposed part of the positioning rod 1, the stepped cylinder part 26 of the positioning sleeve 2, and the limiting step surface 261, the pre-installation of the plug sleeve 5 is facilitated and the deviation of the plug sleeve 5 during the pre-installation process is avoided.

[0049] Secondly, such as Figure 5 As shown in Figure B, the positioning rod 1 is pulled up and rotated until the boss 11 abuts against the first limiting surface 231 of the positioning sleeve 2, so that the positioning rod 1 avoids the feed window 24 of the positioning sleeve 2. The feed window 24 of the cone plug 4 is inserted into the cylinder hole of the positioning sleeve 2, and the cone plug 4 is supported and restricted from sliding by the limiting rubber ring 3. The positioning rod 1 is rotated so that its boss 11 is disengaged from the abutment range of the first limiting surface 231 to directly above the abutment range of the second limiting surface 232. A pressure device is used to apply downward pressure to the upper end face 12 of the positioning rod 1, pressing the positioning rod 1 down to abut against the second limiting surface 232 of the positioning sleeve 2, thereby pressing down the cone plug 4 so that its chamfered part breaks through the supporting limit of the limiting rubber ring 3 and is pressed into the plug sleeve without deflection. Furthermore, in this process, the lower protrusion 13 of the positioning rod 1 is directly opposite the vent hole 41 of the inserted cone plug 4, which helps to ensure that the cone plug 4 does not deflect during the pressing process.

[0050] Finally, rotate the positioning rod 1 so that its boss 11 is disengaged from the overlap range of the second limiting surface 232 to directly above the overlap range of the third limiting surface 233. Use a pressure device to apply downward pressure to the upper end face 12 of the positioning rod 1, press the positioning rod 1 down to overlap and limit with the third limiting surface 233 of the positioning sleeve 2, so that the cone plug 4 is pressed into the plug sleeve 5 in the qualified position, completing the quick installation of the composite plug. Then, pull out the positioning rod 1 together with the positioning sleeve.

[0051] Throughout the process, it is ensured that the cone plug 4 and the plug sleeve 5 have sufficient interference fit, while also ensuring that the plug sleeve does not crack due to the expansion of the cone plug.

[0052] Preferably, it can be as described in this embodiment. Figure 5 As shown in A and B, when the plug sleeve 5 is pre-installed, a small adaptive adjustment margin is reserved between the lower end of the plug sleeve 5 and the lower end of the housing mounting hole 100. This distance provides further adaptive adjustment space for both when the cone plug 4 is pressed down, thereby avoiding the influence of the deformation of the plug sleeve 5 under pressure on the cone plug 4.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quick-installation tool for composite plugs, characterized in that, include: The positioning rod (1) is a cylinder of equal diameter, with a boss (11) fixed on one side of the axial center. The positioning sleeve (2) has a cylindrical hole (21) that slides with the positioning rod, and the diameter of the cylindrical hole is such that the cone plug (4) can slide inside the cylindrical hole; the upper cylindrical wall is provided with a limiting groove (22) that communicates with the cylindrical hole, and the opening of the limiting groove makes the remaining end face of the top opening of the positioning sleeve form a first limiting surface (231), the limiting groove itself forms a second limiting surface (232) and a third limiting surface (233), and the heights of the first, second and third limiting surfaces decrease in sequence; the bottom end of the positioning sleeve forms a stepped cylindrical part (26) and an annular limiting stepped surface (261). The cylinder between the limiting step surface and the third limiting surface has a feed window (24) that communicates with the cylinder hole and allows the cone plug to be inserted. The positioning sleeve also has an annular rubber ring mounting groove on the inner wall of the cylinder hole below the feeding window. A limiting rubber ring is installed in the rubber ring mounting groove. The limiting rubber ring forms an annular elastic limiting protrusion on the inner wall of the cylinder hole. The distance between the limiting rubber ring and the feeding window is such that when the cone plug is inserted into the cylinder hole, the lower chamfer of the cone plug is supported by the limiting rubber ring, and the upper end of the cone plug can be observed from the feeding window to ensure that the lower end of the positioning rod faces the upper end face of the cone plug under positive pressure. When the boss of the positioning rod presses against the third limiting surface in the positioning sleeve, part of the lower end of the positioning rod protrudes from the bottom end face of the positioning sleeve.

2. The composite plug quick installation tool as described in claim 1, characterized in that, The upper end face (12) of the positioning rod is dome-shaped.

3. The composite plug quick installation tool as described in claim 1, characterized in that, The lower end of the positioning rod is provided with a lower protruding pin (13) that protrudes vertically downward along the axis for inserting a conical plug into an exhaust hole.

4. The composite plug quick installation tool as described in claim 1, characterized in that, The first, second, and third limiting surfaces are arranged sequentially around the axis of the cylinder hole.

5. The composite plug quick installation tool as described in claim 1, characterized in that, The transition surfaces between the first and second limiting surfaces, and between the second and third limiting surfaces, are both vertical surfaces parallel to the axis of the positioning rod body.

6. The composite plug quick-installation tool as described in claim 1 or 4, characterized in that, The first limiting surface has a surrounding angle of 180 degrees, while the second and third limiting surfaces each have a surrounding angle of 90 degrees.

7. The composite plug quick installation tool as described in claim 3, characterized in that, You can observe from the feed window to ensure that the lower protrusion of the positioning rod is aligned with the vent hole of the inserted cone plug.

8. A method for rapid installation of composite plugs, characterized in that, Use the composite plug quick installation tool as described in claim 1.

9. The rapid installation method for the composite plug as described in claim 8, characterized in that, include: Step 1: Pre-install the plug sleeve into the housing mounting hole: Move the positioning rod, which is fitted into the positioning sleeve, downwards until its boss and the third limiting surface press against each other. Place the plug sleeve on the lower end of the positioning rod that is exposed at the bottom of the positioning sleeve, and make the upper end face of the plug sleeve abut against the lower end face of the stepped cylindrical part of the positioning sleeve. This ensures that the plug sleeve can remain coaxial with the positioning rod and the positioning sleeve during the pre-installation pressing process, and the lower end face of the stepped cylindrical part transmits the downward pressure on the plug sleeve. After aligning the plug sleeve with the housing mounting hole, press down the positioning sleeve and the positioning rod simultaneously. First, press the plug sleeve into the housing mounting hole as a whole. Then, while aligning the stepped cylindrical part of the positioning sleeve with the housing mounting hole, continue to press down the plug sleeve and keep the plug sleeve coaxial with the housing mounting hole until the limiting stepped surface of the positioning sleeve abuts against the upper surface of the housing. Step 2: Pull the positioning rod upward and rotate it until the boss abuts against the first limiting surface of the positioning sleeve, so that the positioning rod avoids the feeding window of the positioning sleeve. Insert the cone plug into the cylinder hole of the positioning sleeve through the feeding window, and the limiting rubber ring supports and prevents the cone plug from sliding down. Rotate the positioning rod so that its boss is disengaged from the first limiting surface to directly above the second limiting surface. Press the positioning rod down until it abuts against the second limiting surface of the positioning sleeve, thereby pressing down the cone plug so that its chamfered part breaks through the supporting limit of the limiting rubber ring and is pressed into the plug sleeve without deflection. Step 3: Rotate the positioning rod so that its boss is disengaged from the second limiting surface to directly above the third limiting surface. Press the positioning rod down until it abuts against the third limiting surface of the positioning sleeve, so that the cone plug is pressed into the qualified position inside the plug sleeve, completing the quick installation of the composite plug. Then, pull out the positioning rod and the positioning sleeve together.

10. The rapid installation method for the composite plug as described in claim 9, characterized in that, include: In step one, a small adaptive adjustment allowance is reserved between the lower end of the plug and the lower end of the housing mounting hole.

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