Rapid installation tool and installation method for composite plug

Abstract

According to the rapid installation tool and method for the composite plug, a positioning sleeve is matched with a positioning rod and a boss of the positioning rod through three limiting faces formed by limiting grooves of the positioning sleeve, a step barrel part at the bottom end and an annular limiting step face, the interference magnitude of a conical plug and a plug sleeve can be ensured, and it can be ensured that the plug sleeve is not expanded and cracked by the conical plug; and the assembling efficiency and quality can be effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of assembly of an electro-hydraulic servo valve of an aero-engine, and in particular relates to a composite plug quick installation tool and an installation method. Background Art

[0002] In the past, composite plugs were used to assemble the housing of aircraft engine electro-hydraulic servo valves, which had low assembly efficiency and low assembly qualification rate. In addition, due to the thin wall thickness of the plug sleeve of the composite plug, the plug sleeve was easily cracked when the plug sleeve was pressed into the housing mounting hole 100 and the cone plug was pressed into the plug sleeve. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides the following technical solutions:

[0004] Composite plug quick installation tool, which includes:

[0005] The positioning rod is a cylindrical body of equal diameter, and a boss is fixedly provided on one side of the axial middle part;

[0006] The positioning sleeve has a barrel hole that is slidably matched with the positioning rod, and the barrel hole diameter satisfies the ability of the cone plug to slide in the barrel hole; a limiting groove that is intersecting with the barrel hole is formed on the upper barrel wall, and the opening of the limiting groove makes the remaining end surface of the barrel mouth at the top end of the positioning sleeve form a first limiting surface, and the limiting groove itself forms a second limiting surface and a third limiting surface, and the heights of the first, second, and third limiting surfaces decrease in sequence; a stepped barrel portion and an annular limiting stepped surface are formed at the bottom end of the positioning sleeve;

[0007] The cylinder body between the limiting step surface and the third limiting surface is provided with a feeding window which is connected with the cylinder hole and can be plugged with a cone;

[0008] The positioning sleeve is also provided with an annular rubber ring installation groove on the inner wall of the barrel hole below the feed window, and a limiting rubber ring is installed in the rubber ring installation groove. The limiting rubber ring forms an annular elastic limiting protrusion on the inner wall of the barrel hole, and the distance between the limiting rubber ring and the feed window is sufficient to ensure that when the cone plug is inserted into the barrel hole, the chamfer of the lower part of the cone plug is supported by the limiting rubber ring, and the upper end of the cone plug can be observed from the feed window to ensure that the lower end face of the positioning rod is positively pressed against the upper end face of the cone plug;

[0009] When the boss of the positioning rod is pressed against the third limiting surface in the positioning sleeve to limit the position, a portion of the lower end of the positioning rod is exposed from the bottom end surface of the positioning sleeve.

[0010] Furthermore, the upper end surface of the positioning rod is a dome surface.

[0011] Furthermore, a lower protruding pin is provided at the center of the lower end of the positioning rod and protrudes vertically downward along the axis and is used to be inserted into the exhaust hole of the cone plug.

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

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

[0014] Furthermore, the surrounding angle of the first limiting surface is 180 degrees, and the surrounding angles of the second limiting surface and the third limiting surface are 90 degrees respectively.

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

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

[0017] Further, including:

[0018] Step 1, pre-install the plugging sleeve into the housing mounting hole: move the positioning rod inserted into the positioning sleeve downward until its boss is pressed against the third limiting surface, and put the plugging sleeve on the lower end of the positioning rod exposed at the bottom end of the positioning sleeve so that the upper end surface of the plugging sleeve is in contact with the lower end surface of the step barrel portion of the positioning sleeve, so as to ensure that the plugging sleeve can maintain coaxiality with the positioning rod and the positioning sleeve during the pre-installation and pressing process, and the downward pressure on the plugging sleeve is provided by the lower end surface of the step barrel portion; after the plugging sleeve is aligned with the housing mounting hole, the positioning sleeve and the positioning rod are pressed down synchronously, and the plugging sleeve is first pressed into the housing mounting hole as a whole, and then, during the process of aligning the step barrel portion of the positioning sleeve and pressing it into the housing mounting hole, the plugging sleeve is continued to be pressed down and the coaxiality between the plugging sleeve and the housing mounting hole is maintained, until the limiting step surface of the positioning sleeve is in contact with the upper surface of the housing;

[0019] Step 2: Pull up the positioning rod and rotate it until the boss abuts against the first limiting surface of the positioning sleeve, so that the positioning rod avoids the feed window of the positioning sleeve, and installs the cone plug feed window into the barrel hole of the positioning sleeve, and the limiting rubber ring supports and limits the cone plug from sliding off; rotate the positioning rod to make its boss disengage from the first limiting surface to just above the second limiting surface, and 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 three, rotate the positioning rod so that its boss disengages from the second limit surface to just above the third limit surface, press the positioning rod down until it overlaps the third limit surface of the positioning sleeve to limit the position, press the cone plug as a whole into the qualified position in the plug sleeve, complete the rapid installation of the composite plug, and then pull out the positioning rod together with the positioning sleeve as a whole.

[0021] In step 1, a small adaptive adjustment margin is reserved between the lower end of the plugging sleeve and the lower end of the housing mounting hole.

[0022] The composite plug quick installation tool used in the present invention has a simple structure, low manufacturing and maintenance costs, reliable performance, and saves assembly time for pressing the composite plug into the housing. The positioning sleeve 2 is pressed into the plug sleeve, and the positioning rod 1 is pressed into the cone plug. The composite plug is quickly assembled at one time, which reduces production preparation time and processing time, thereby saving costs.

[0023] The depth of the plugging sleeve pressed into the shell is controlled by the stepped barrel portion and the limiting step surface of the positioning sleeve. The boss of the positioning rod cooperates with the three limiting surfaces of the limiting groove of the positioning sleeve, which can not only limit the pressing depth of the cone plug and ensure the interference between the cone plug and the plugging sleeve, but also ensure that the plugging sleeve is not cracked by the cone plug, which can effectively improve the assembly efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings that constitute a part of the present invention are used to provide further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

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

[0026] Figure 2 is a three-dimensional schematic diagram of a positioning sleeve;

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

[0028] Figure 4 is a top view schematic diagram of one of the combined states of the positioning rod and the positioning sleeve;

[0029] Figure 5 A schematic diagram of the installation process.

[0030] Reference numerals in the figure: positioning rod 1; positioning sleeve 2; limiting rubber ring 3; cone plug 4; plug sleeve 5; housing mounting hole 100;

[0031] Boss 11; dome surface 12; lower convex pin 13;

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

[0033] Cone plug 4; exhaust hole 41; plug sleeve 5. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

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

[0036] The composite plug quick installation tool of the present invention comprises 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 cylindrical body with equal diameter, and a boss 11 is fixedly provided on one side of the axial middle part;

[0038] Preferably, Figure 1 , Figure 3 and Figure 5 As shown, the upper end surface 12 of the positioning rod is a dome surface;

[0039] Preferably, Figure 5 As shown, a lower convex pin 13 protruding vertically downward along the axis is provided at the center of the lower end of the positioning rod 1, and the lower convex pin 13 is used to cooperate with the exhaust hole 41 of the cone plug 4. The lower convex pin 13 is inserted into the exhaust hole 41 of the cone plug 4, so as to facilitate temporary coaxial connection, and to facilitate the subsequent insertion link to keep the cone plug 4 and the cylinder of the positioning rod 1 coaxial;

[0040] like Figure 2 As shown, the positioning sleeve 2 has a barrel hole 21 that can slide with the positioning rod 1, and the diameter of the barrel hole 21 is sufficient for the cone plug 4 to be inserted and slide in the barrel hole; the upper barrel wall is provided with a limiting groove 22 that penetrates the barrel hole 21, and the opening of the limiting groove 22 makes the remaining end surface of the top barrel mouth of the positioning sleeve 2 form a first limiting surface 231, and the limiting groove 22 itself below the first limiting surface 231 forms a second limiting surface 232 and a third limiting surface 233, and the heights of the first, second and third limiting surfaces decrease successively; preferably, they are arranged counterclockwise around the axis of the barrel hole 21. This arrangement saves the most space and can ensure that the positioning sleeve 2 and its three limiting surfaces have a high strength to support the limiting boss 11 and the positioning rod 1 to which it belongs.

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

[0042] Preferably, Figure 4 As shown, the first limiting surface 231 has a surrounding angle of 180 degrees, and the second limiting surface 232 and the third limiting surface 233 have a surrounding angle of 90 degrees respectively. The above structural features save space and ensure that the positioning sleeve 2 and its three limiting surfaces have high strength to support the limiting boss 11 and the positioning rod 1 to which it belongs.

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

[0044] A feeding window 24 is provided on the cylinder body between the limiting step surface 261 and the third limiting surface 233 , which is connected with the cylinder hole 21 and allows the cone plug 4 to be inserted into the cylinder hole 21 through the feeding window.

[0045] The positioning sleeve 2 is also provided with an annular rubber ring mounting groove 25 on the inner wall of the barrel hole 21 below the feed window 24, and 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 barrel hole 21, and the distance between the limiting rubber ring 3 and the feed window 24 is sufficient to ensure that when the cone plug 4 is inserted into the barrel hole 21, the lower chamfer of the cone plug 4 is supported by the limiting rubber ring 3, and the upper end of the cone plug 4 can be observed from the feed window 24 to ensure that the lower end face of the positioning rod 1 is positively pressed against the upper end face of the cone plug 4; further, it can be observed from the feed window 24 to ensure that the lower protruding pin 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 and the third limit surface 233 are pressed against the limit, the lower end of the positioning rod 1 is partially exposed from the bottom end surface of the positioning sleeve 2. In this state, the exposed positioning rod 1 can be used to fit the plug sleeve 5 in the early stage so as to align the plug sleeve 5 and pre-install it into the shell mounting hole 100; in addition, when the cone plug 4 is pressed into the plug sleeve 5, since the lower end of the positioning rod 1 can be partially exposed, it also facilitates the smooth installation process and helps to ensure that the plug sleeve is not stretched by the cone plug.

[0047] Installation method:

[0048] First, use the installation tool to pre-install the plugging sleeve 5 into the housing installation hole 100: move the positioning rod 1 inserted into the positioning sleeve 2 downward until its boss 11 and the third limiting surface 233 are pressed against the limit position, and the lower end of the positioning rod 1 is partially exposed from the bottom end surface of the positioning sleeve 2, and the plugging sleeve 5 is sleeved on the lower end of the positioning rod 1 exposed from the bottom end of the positioning sleeve 2, and the upper end surface of the plugging sleeve 5 is abutted against the lower end surface of the step barrel portion 26 of the positioning sleeve 2, thereby ensuring that the plugging sleeve 5 is pre-installed and pressed down. During the process, the blocking sleeve 5 can be kept coaxial with the positioning rod 1 and the positioning sleeve 2, and the lower end surface of the step cylinder 26 transmits the downward pressure on the plugging sleeve 5. After the plugging sleeve 5 is aligned with the housing mounting hole 100, the positioning sleeve 2 and the positioning rod 1 are pressed down synchronously. The blocking sleeve 5 is first pressed into the housing mounting hole 100 as a whole. Then, when the step cylinder 26 of the positioning sleeve 2 is aligned and pressed into the housing mounting hole 100, the blocking sleeve 5 is continued to be pressed down and the coaxial center of the blocking sleeve 5 and the housing mounting hole 100 is maintained (such as Figure 5As shown in A), until the limiting step surface 261 of the positioning sleeve 2 abuts against the upper surface of the shell, it means that the plugging sleeve 5 is pre-installed in place; the exposed part of the positioning rod 1, the step cylinder part 26 of the positioning sleeve 2, and the limiting step surface 261 cooperate with each other, which not only facilitates the pre-installation of the plugging sleeve 5, but also avoids the deflection of the plugging sleeve 5 during the pre-installation process;

[0049] Secondly, if Figure 5 As shown in B, the positioning rod 1 is pulled up and rotated until the boss 11 abuts against the first limit surface 231 of the positioning sleeve 2, so that the positioning rod 1 avoids the feed window 24 of the positioning sleeve 2, and the feed window 24 of the cone plug 4 is installed in the barrel hole of the positioning sleeve 2, and the cone plug 4 is supported and restricted by the limit rubber ring 3 to slide off; the positioning rod 1 is rotated to make its boss 11 leave the abutment range of the first limit surface 231 to just above the abutment range of the second limit surface 232, and a pressure device is used to apply downward pressure on the upper end surface 12 of the positioning rod 1, and the positioning rod 1 is pressed down until it abuts against the second limit surface 232 of the positioning sleeve 2, thereby pressing down the cone plug 4 so that its chamfered part breaks through the support limit of the limit rubber ring 3 and is pressed into the plugging sleeve without deflection; further, in this process, the lower protruding pin 13 of the positioning rod 1 is directly opposite to the exhaust hole 41 inserted into the cone plug 4, which is more helpful to ensure that the cone plug 4 is not deflected during the downward pressing process.

[0050] Finally, rotate the positioning rod 1 so that its boss 11 moves out of the abutment range of the second limit surface 232 to just above the abutment range of the third limit surface 233, use pressure equipment to apply downward pressure on the upper end surface 12 of the positioning rod 1, press the positioning rod 1 down to abut against the third limit surface 233 of the positioning sleeve 2, and press the cone plug 4 as a whole into the qualified position in the plug sleeve 5, completing the rapid installation of the composite plug, and then pull out the positioning rod 1 together with the positioning sleeve as a whole.

[0051] During the whole process, it can be ensured that the cone plug 4 and the plugging sleeve 5 have sufficient interference fit, and the plugging sleeve is not broken by the cone plug.

[0052] Preferably, as in this embodiment Figure 5 As shown in A and B, when the plugging sleeve 5 is pre-installed, a small adaptive adjustment margin is reserved for the lower end of the plugging sleeve 5 and the lower end of the housing mounting hole 100, so that when the cone plug 4 is pressed down, this distance further provides adaptive adjustment space for the two, thereby avoiding the influence of the compressive deformation of the plugging sleeve 5 on the downward pressure of 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Composite plug quick installation tool, characterized by: include: The positioning rod (1) is a cylindrical body with equal diameters and a boss (11) fixedly provided on one side of the axial middle part; The positioning sleeve (2) has a barrel hole (21) that is slidably matched with the positioning rod, and the barrel hole diameter is sufficient for the cone plug (4) to slide in the barrel hole; the upper barrel wall is provided with a limiting groove (22) that is connected with the barrel hole, and the formation of the limiting groove makes the remaining end surface of the barrel mouth at the top end of the positioning sleeve form a first limiting surface (231), and 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 is formed with a stepped barrel portion (26) and an annular limiting stepped surface (261); A feeding window (24) is provided on the cylinder body between the limiting step surface and the third limiting surface, which is connected to the cylinder hole and can be plugged by the cone; The positioning sleeve is also provided with an annular rubber ring installation groove on the inner wall of the barrel hole below the feed window, and a limiting rubber ring is installed in the rubber ring installation groove. The limiting rubber ring forms an annular elastic limiting protrusion on the inner wall of the barrel hole, and the distance between the limiting rubber ring and the feed window is sufficient to ensure that when the cone plug is inserted into the barrel hole, the chamfer of the lower part of the cone plug is supported by the limiting rubber ring, and the upper end of the cone plug can be observed from the feed window to ensure that the lower end face of the positioning rod is positively pressed against the upper end face of the cone plug; When the boss of the positioning rod is pressed against the third limiting surface in the positioning sleeve to limit the position, a portion of the lower end of the positioning rod is exposed from the bottom end surface of the positioning sleeve.

2. The composite plug quick installation tool according to claim 1, characterized in that: The upper end surface (12) of the positioning rod is a dome surface.

3. The composite plug quick installation tool according to claim 1, characterized in that: A lower protruding pin (13) protruding vertically downward along the axis and used for inserting into the exhaust hole of the cone plug is provided at the center of the lower end of the positioning rod.

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

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

6. The composite plug quick installation tool according to claim 1 or 4, characterized in that: The surrounding angle of the first limiting surface is 180 degrees, and the surrounding angles of the second limiting surface and the third limiting surface are 90 degrees respectively.

7. The composite plug quick installation tool according to claim 1 or 4, characterized in that: It can be observed from the feed window to ensure that the lower protruding pin of the positioning rod is aligned with the exhaust hole inserted into the cone plug.

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

9. The rapid installation method of composite plugging according to claim 8, characterized in that: include: Step 1, pre-install the plugging sleeve into the housing mounting hole: move the positioning rod inserted into the positioning sleeve downward until its boss is pressed against the third limiting surface, and put the plugging sleeve on the lower end of the positioning rod exposed at the bottom end of the positioning sleeve so that the upper end surface of the plugging sleeve is in contact with the lower end surface of the step barrel portion of the positioning sleeve, so as to ensure that the plugging sleeve can maintain coaxiality with the positioning rod and the positioning sleeve during the pre-installation and pressing process, and the downward pressure on the plugging sleeve is provided by the lower end surface of the step barrel portion; after the plugging sleeve is aligned with the housing mounting hole, the positioning sleeve and the positioning rod are pressed down synchronously, and the plugging sleeve is first pressed into the housing mounting hole as a whole, and then, during the process of aligning the step barrel portion of the positioning sleeve and pressing it into the housing mounting hole, the plugging sleeve is continued to be pressed down and the coaxiality between the plugging sleeve and the housing mounting hole is maintained, until the limiting step surface of the positioning sleeve is in contact with the upper surface of the housing; Step 2: Pull up the positioning rod and rotate it until the boss abuts against the first limiting surface of the positioning sleeve, so that the positioning rod avoids the feed window of the positioning sleeve, and installs the cone plug feed window into the barrel hole of the positioning sleeve, and the limiting rubber ring supports and limits the cone plug from sliding off; rotate the positioning rod to make its boss disengage from the first limiting surface to just above the second limiting surface, and 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 three, rotate the positioning rod so that its boss disengages from the second limit surface to just above the third limit surface, press the positioning rod down until it overlaps the third limit surface of the positioning sleeve to limit the position, press the cone plug as a whole into the qualified position in the plug sleeve, complete the rapid installation of the composite plug, and then pull out the positioning rod together with the positioning sleeve as a whole.

10. The rapid installation method of composite plugging according to claim 9, characterized in that: include: In step 1, a small adaptive adjustment margin is reserved between the lower end of the plugging sleeve and the lower end of the housing mounting hole.

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