A plug cover assembly tool and assembly method

Abstract

The application discloses a plug cover assembling tool and an assembling method, and solves the technical problems of a large amount of manpower consumed in the installation process of the plug cover and low assembling efficiency in the prior art. The assembling tool comprises a base, a limiting block and a push rod assembly, wherein the base is provided with a containing cavity for placing a plug seat of the plug cover; the limiting block is arranged on the base and is annular, and the limiting block is provided with an installation hole penetrating through the limiting block in the radial direction of the annular; and the push rod assembly is arranged in the installation hole and comprises an operating part, an elastic member and a push rod for pushing a steel ball in the radial direction of the annular in sequence. In the assembling process, the plug seat is positioned by the base and the limiting block, and then the steel ball and the spring placed in the plug seat are in a compressed state by the push rod assembly, specifically, the push rod is driven by the operating part and the elastic member to push the steel ball, and then the steel ball is pressed into the plug cover, thereby saving manpower, and the plug cover has the advantages of low cost, simple operation and high processing efficiency.

Description

Technical Field

[0001] This application belongs to the field of end cap installation technology, specifically relating to an end cap assembly tooling and assembly method. Background Technology

[0002] A borescope plug is available, consisting of a plug cover, a plug seat, three springs, and three steel balls. During assembly, the three springs and three steel balls must be simultaneously pressed into the placement holes in the plug seat, and then the plug cover is fastened on, completely covering the three springs and three steel balls. Typical assembly method involves three people: two use push rods to press the three steel balls and springs into the plug seat, and one person installs the plug cover.

[0003] Traditional assembly methods consume a lot of manpower, have low assembly efficiency, and are not economical. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a head cover assembly fixture and assembly method, which solves the technical problem that the head cover installation process in the prior art consumes a lot of manpower and has low assembly efficiency.

[0005] The technical solution adopted to achieve the purpose of this application is a head cover assembly fixture, comprising:

[0006] The base has a cavity for receiving the plug seat for placing the plug;

[0007] A limiting block is provided on the base. The limiting block is annular and has a mounting hole that penetrates the limiting block radially along the annulus.

[0008] The push rod assembly, placed in the mounting hole, includes an operating part, an elastic element, and a push rod for pushing the steel ball of the plug, arranged radially in a ring.

[0009] Furthermore, the base is also provided with a positioning cavity that matches the protrusion at the bottom of the plug seat; the receiving cavity is annular and located on the periphery of the positioning cavity.

[0010] Furthermore, the base and the plug seat are detachably connected.

[0011] Furthermore, the limiting block is provided with a plurality of pin holes, and the base is provided with positioning holes corresponding to the pin holes. The limiting block is limited to the base by positioning pins inserted into the pin holes and positioning holes.

[0012] Furthermore, the operating part includes a rotating end and a threaded end, and an internal thread is provided in the mounting hole, and the threaded end is threadedly connected to the internal thread in the mounting hole.

[0013] Furthermore, the push rod includes a first section and a second section, wherein the first section contacts the elastic element, and the second section extends into the annular cavity of the limiting block.

[0014] Furthermore, the end of the second section of the push rod that extends into the annular cavity of the limiting block is spherical.

[0015] Furthermore, the threaded end is also provided with a placement groove for placing the elastic element.

[0016] Furthermore, the mounting hole includes a first stepped hole, a second stepped hole, and a third stepped hole, wherein the first stepped hole, the second stepped hole, and the third stepped hole have an increasing trend, and the third stepped hole has an internal thread that is threaded to the threaded end. The first stepped hole and the second stepped hole form a second movable slide area.

[0017] Based on the same inventive concept, this application provides an assembly method using the above-mentioned end cap assembly fixture, characterized by comprising the following steps:

[0018] The plug seat containing the spring and steel ball is placed into the receiving cavity of the base through the annular cavity of the limiting block;

[0019] Operate the operating part of the push rod assembly so that the push rod pushes the steel ball of the plug into the mounting hole;

[0020] Press the end cap between the push rod and the steel ball to complete the end cap assembly.

[0021] As can be seen from the above technical solution, this application provides a plug cover assembly fixture, which includes: a base, a limiting block, and a push rod assembly. The base has a receiving cavity for placing the plug seat; the limiting block is disposed on the base, and the limiting block is annular, with a mounting hole penetrating the limiting block radially along the annulus; the push rod assembly is placed in the mounting hole, including an operating part, an elastic element, and a push rod for pushing the steel ball of the plug radially along the annulus; during assembly, the plug seat is limited and positioned by the base and the limiting block, and then the push rod assembly compresses the steel ball and spring placed in the plug seat. Specifically, the operating part and the elastic element drive the push rod to push the steel ball, then the steel ball is pressed in, and then the plug cover is put in. This saves manpower, and only one person is needed to complete the assembly operation. It has the advantages of low cost, simple operation, and high processing efficiency.

[0022] This application provides an assembly method for a plug assembly fixture, including the following steps: First, the plug seat containing a spring and a steel ball is placed into the receiving cavity of the base through the annular cavity of the limiting block. Specifically, the plug seat has three placement holes for placing the spring and steel ball. The spring and steel ball are first placed into the placement holes of the plug seat sequentially. Then, the plug seat is placed in the receiving cavity of the base along its periphery. Next, the limiting block is placed, wherein the mounting hole of the limiting block corresponds to the position of the placement hole to facilitate pushing the steel ball. The hexagonal recessed protrusion of the plug seat is aligned with the hexagonal groove positioning cavity. When the hexagonal recessed protrusion is placed above the hexagonal groove on the base, it limits the position of the plug seat, preventing the plug seat from rotating during assembly. A locating pin is also used to limit the position of the limiting block against the base. The second step involves operating the push rod assembly to push the steel ball of the plug into the mounting hole. Specifically, rotating the rotating end into the mounting hole causes the threaded end to connect with the internal thread in the mounting hole, thereby moving the operating part forward or backward along the mounting hole, bringing the push rod into contact with the steel ball for easy assembly of the plug cover. The third step involves pressing the plug cover between the push rod and the steel ball to complete the plug cover assembly. Specifically, the plug cover has three spherical grooves, the positions of which correspond to the placement holes on the plug seat. The plug cover is aligned with the three spherical grooves on the plug seat and pressed in. If misaligned, the plug cover can be slightly rotated after insertion, causing the steel ball to pop out from the corresponding hole under spring pressure, thus completing the plug cover assembly. The three spherical grooves on the plug cover match the steel ball, and the position of the plug cover can be adjusted at any time during insertion to facilitate engagement between the steel ball and the corresponding spherical groove. Fourth step: After the plug cover assembly is complete, the push rod assembly is rotated and removed; then the limit pin is removed, followed by the limit block; finally, the plug seat is separated from the base and removed, allowing the assembled plug to be taken out. This method has the advantages of low cost, simple operation, and high processing efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the assembly tooling structure in an embodiment of this application.

[0024] Figure 2 This is a cross-sectional view of the assembly tooling structure in the embodiments of this application.

[0025] Figure 3 This is a schematic diagram of the structure of the plug cover assembled on the plug seat in the embodiment of this application.

[0026] Figure 4 This is a perspective view of the plug cover being assembled on the plug seat in an embodiment of this application.

[0027] Figure 5This is a perspective view of the assembly tooling structure in the embodiments of this application.

[0028] Explanation of reference numerals in the attached drawings: 10-assembly fixture, 101-base, 1011-receiving cavity, 1012-positioning cavity, 102-limiting block, 1021-mounting hole, 10211-first stepped hole, 10212-second stepped hole, 10213-third stepped hole, 1022-pin hole, 103-push rod assembly, 1031-operating part, 10311-rotating end, 10312-threaded end, 10313-placement groove, 1032-elastic element, 1033-push rod, 10331-first section, 10332-second section; 20-plug, 201-plug seat, 202-plug cover, 203-spring, 204-steel ball, 205-spherical groove. Detailed Implementation

[0029] To enable those skilled in the art to better understand this application, the technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] The plug 20 in this application comprises a plug cover 202, a plug seat 201, three springs 203, and three steel balls 204. During assembly, the three springs 203 and three steel balls 204 are simultaneously pressed into the placement holes in the plug seat 201. The plug cover 202 also has spherical grooves 205 corresponding to the placement holes. The assembly of the plug cover 202 in the following embodiments is described using this product.

[0031] Example 1:

[0032] In this embodiment of the application, a head cover 202 assembly fixture 10 is provided, see attached document. Figure 1 To be continued Figure 5 The assembly fixture 10 includes a base 101, a limiting block 102, and a push rod assembly 103. The base 101 has a receiving cavity 1011 for placing a plug seat 201. The limiting block 102 is disposed on the base 101 and is annular. The limiting block 102 has a mounting hole 1021 that passes through the limiting block 102 radially along the annulus. The push rod assembly 103 is placed in the mounting hole 1021 and includes an operating part 1031, an elastic element 1032, and a push rod 1033 for pushing the steel ball 204 of the plug, arranged sequentially along the annulus radial direction.

[0033] During assembly, refer to the appendix. Figure 3The plug seat 201 is positioned by the base 101 and the limiting block 102. Then, the push rod assembly 103 compresses the steel ball 204 and spring 203 placed inside the plug seat 201. Specifically, the operating part 1031 and the elastic element 1032 drive the push rod 1033 to push the steel ball 204, press the steel ball 204 in, and then cover the plug cover 202. This saves manpower, requiring only one person to complete the assembly. It has the advantages of low cost, simple operation, and high processing efficiency.

[0034] In order to limit the position of the plug seat 201 and facilitate its assembly, in some embodiments, see the attached drawing. Figure 2 and attached Figure 3 The base 101 is also provided with a positioning cavity 1012 that matches the protrusion at the bottom of the plug seat 201; the receiving cavity 1011 is annular and located around the positioning cavity 1012. In actual assembly, the plug seat 201 is placed in the receiving cavity 1011, and then the protrusion at the bottom of the plug seat 201 is placed in the positioning cavity 1012, thereby limiting the position of the plug seat 201 and preventing it from rotating during assembly, which would affect assembly efficiency. In other embodiments, the receiving cavity 1011 is annular and matches the plug seat 201, making it easier for the plug seat 201 to be inserted into the receiving cavity 1011 along its periphery, thus improving assembly efficiency.

[0035] To facilitate placing the plug holder 201 on the base 101, and to facilitate removing the plug holder 201 or limiting its position, please refer to the appendix. Figure 2 and attached Figure 3 In some embodiments, the base 101 and the plug seat 201 are detachably connected. In other embodiments, the bottom of the plug seat 201 is provided with a hexagonal recessed protrusion, and the positioning cavity 1012 is a hexagonal groove. When the hexagonal recessed protrusion of the plug seat 201 is placed above the hexagonal groove on the base 101, the plug seat 201 is limited, thereby preventing the plug seat 201 from rotating during the assembly process and affecting the assembly efficiency.

[0036] To facilitate the positioning of the limiting block 102 against the base 101 and prevent the limiting block 102 from rotating, in some embodiments, see the appendix. Figure 1The limiting block 102 is also provided with a plurality of pin holes 1022, and the base 101 is provided with positioning holes corresponding to the pin holes 1022. The limiting block 102 is limited to the base 101 by positioning pins inserted into the pin holes 1022 and positioning holes. The number of pin holes 1022 can be 3, 4 or 5, and they are evenly distributed along the annular area of ​​the limiting block 102. The specific number can be set according to the situation. Preferably, 4 pin holes 1022 are evenly distributed along the annular area of ​​the limiting block 102. Specifically, when the limiting block 102 is placed on the base 101, the pin holes 1022 correspond to the positioning holes. Then, positioning pins are inserted into the pin holes 1022 and positioning holes to limit and fix the limiting block 102 to the base 101. In other embodiments, positioning holes can also be provided on the pin holes 1022 or positioning holes, and corresponding positioning pins can be provided on the positioning holes or pin holes 1022. During assembly, the positioning pins are inserted into the positioning holes to achieve positioning.

[0037] To ensure that the push rod 1033 remains stationary after being aligned with the steel ball 204 via the operating unit 1031, please refer to the appendix. Figure 1 To be continued Figure 3 In some embodiments, the operating part 1031 includes a rotating end 10311 and a threaded end 10312. An internal thread is provided in the mounting hole 1021, and the threaded end 10312 is threadedly connected to the internal thread in the mounting hole 1021. Rotating the rotating end 10311 into the mounting hole 1021 causes the threaded end 10312 to be threadedly connected to the internal thread in the mounting hole 1021, thereby driving the operating part 1031 to move forward or backward along the mounting hole 1021. This causes the push rod 1033 to contact the steel ball 204 and abut against it, facilitating the assembly of the plug cover 202. After assembly, the rotating end 10311 can be rotated outward from the mounting hole 1021 to allow the push rod 1033 to retract along the mounting hole 1021, thus completing the assembly of the plug cover 202.

[0038] For easier rotation of the rotating end 10311, please refer to the appendix. Figure 4 In some embodiments, the rotating end 10311 can be a cylindrical structure; in other embodiments, the end of the rotating end 10311 can also be provided with a rotating ring; in order to increase the friction, in other embodiments, a touch block or a frosted finish can be added to the ring surface of the cylindrical rotating end 10311 to increase the friction and achieve the purpose of anti-slip.

[0039] To increase the contact area between the elastic element 1032 and the push rod 1033, and to prevent the elastic element 1032 from causing the push rod 1033 to move forward or backward and deviate, please refer to the appendix. Figure 1 and attached Figure 2In some embodiments, the push rod 1033 includes a first segment 10331 and a second segment 10332, wherein the first segment 10331 contacts the elastic element 1032. This application does not limit the elastic element 1032, and it can be any type of elastic element 1032. In this embodiment, the elastic element 1032 is preferably a spring. The second segment 10332 extends into the annular cavity of the limiting block 102. The first segment 10331 is a rectangular block or a cylindrical block, and its cross-sectional area is larger than the area in contact with the elastic element 1032, so as to prevent the elastic element 1032 from causing the push rod 1033 to move forward or backward and deviate. The second segment 10332 can be a cylindrical rod to facilitate pushing the steel ball 204 of the plug. In other embodiments, the cross-sectional area of ​​the second segment 10332 of the push rod 1033 is smaller than that of the first segment 10331 of the push rod 1033. This facilitates the contact between the first segment 10331 of the push rod 1033 and the elastic element 1032. The second segment 10332 of the push rod 1033 extends into the annular cavity of the limiting block 102 to push the steel ball 204.

[0040] To facilitate the pusher rod 1033 in pushing the steel ball 204 of the plug, and to facilitate the insertion of the plug cover 202 after pushing, please refer to the appendix. Figure 2 In some embodiments, the end of the second segment 10332 of the push rod 1033 that extends into the annular cavity of the limiting block 102 is spherical. Preferably, the second segment 10332 is a cylindrical rod, and the end that contacts the steel ball 204 is a spherical structure with the same diameter as the steel ball 204. This not only facilitates the second segment 10332 in pushing the steel ball 204 during the assembly process, but also facilitates the insertion of the plug cover 202, avoiding jamming or blockage when inserting the plug cover 202.

[0041] To prevent the elastic element 1032 from detaching during the jacking process, please refer to the appendix. Figure 3 In some embodiments, the threaded end 10312 is further provided with a placement groove 10313 for placing the elastic element 1032. Preferably, the length of the elastic element 1032 after maximum compression deformation is greater than the depth of the placement groove 10313, to prevent the elastic element 1032 from being completely located in the placement groove 10313 after compression and thus detaching from the push rod 1033, thereby preventing it from continuing to push the push rod 1033 and affecting assembly efficiency.

[0042] See appendix Figure 1In some embodiments, the push rod assembly 103 can be a detachable structure, specifically, after the elastic element 1032 is placed in the placement groove 10313, one end abuts against the placement groove 10313, and the other end abuts against the first segment 10331 of the push rod 1033. The second segment 10332 of the push rod 1033 is used to extend into the annular cavity of the limiting block 102 to push the steel ball 204. In some embodiments, the push rod assembly 103 can also be an integral structure, wherein one end of the elastic element 1032 is connected to one end of the placement groove 10313, and the other end of the elastic element 1032 is connected to the first segment 10331 of the push rod 1033. The second segment 10332 of the push rod 1033 is used to extend into the annular cavity of the limiting block 102 to push the steel ball 204.

[0043] In some embodiments, the threaded end 10312 may also be a solid structure. One end of the elastic element 1032 abuts against or is fixedly connected to the side of the threaded end 10312 away from the rotating end 10311. Specifically, if the push rod assembly 103 is a detachable structure, one end of the elastic element 1032 abuts against the side of the threaded end 10312 away from the rotating end 10311, and the other end abuts against the first segment 10331 of the push rod 1033, and the second segment 1031 of the push rod 1033... 32 is used to extend into the annular cavity of the limiting block 102 to push the steel ball 204; in some other embodiments, the push rod assembly 103 may also be an integral structure, wherein one end of the elastic element 1032 is fixedly connected to the side of the threaded end 10312 away from the rotating end 10311, the other end of the elastic element 1032 is connected to the first section 10331 of the push rod 1033, and the second section 10332 of the push rod 1033 is used to extend into the annular cavity of the limiting block 102 to push the steel ball 204.

[0044] To facilitate the movement of the pusher assembly 103 within the mounting hole 1021 to push the steel ball 204, please refer to the appendix. Figure 3In some embodiments, the mounting hole 1021 includes a first stepped hole 10211, a second stepped hole 10212, and a third stepped hole 10213, wherein the first stepped hole 10211, the second stepped hole 10212, and the third stepped hole 10213 have an increasing trend. The third stepped hole 10213 is provided with an internal thread and is threaded to the threaded end 10312. The first stepped hole 10211 and the second stepped hole 10212 form a slide area for the second segment 10332 to move. In some embodiments, the diameter of the second stepped hole 10212 is larger than the cross-sectional dimension of the first segment 10331 of the push rod 1033. In this case, the diameter of the third stepped hole 10213 is also larger than the cross-sectional dimension of the first segment 10331 of the push rod 1033, facilitating the sliding of the first segment 10331 of the push rod 1033 through the third stepped hole 10213 and the second stepped hole 10212. The diameter of the first stepped hole 10211 is smaller than the cross-sectional dimension of the first segment 10331 of the push rod 1033, facilitating the sliding of the first segment 10331. The distance that segment 10331 moves is limited. The diameter of the first stepped hole 10211 is larger than the cross-sectional dimension of the second segment 10332 of the push rod 1033, and the diameter of the second stepped hole 10212 is also larger than the cross-sectional dimension of the second segment 10332 of the push rod 1033. This facilitates the sliding of the second segment 10332 of the push rod 1033 within the first stepped hole 10211 and the second stepped hole 10212, and allows the second segment 10332 of the push rod 1033 to extend into the annular cavity of the limiting block 102 for pushing the steel ball 204.

[0045] Example 2:

[0046] Based on the same inventive concept, this application provides an assembly method using the above-mentioned end cap assembly fixture, comprising the following steps:

[0047] The plug seat 201, containing the spring 203 and the steel ball 204, is inserted into the receiving cavity 1011 of the base 101 through the annular cavity of the limiting block 102; see appendix. Figure 2Specifically, the plug seat 201 has three placement holes for placing the spring 203 and the steel ball 204. First, the spring 203 and the steel ball 204 are placed into the placement holes of the plug seat 201 in sequence. Then, the plug seat 201 is placed in the receiving cavity 1011 of the base 101 along the periphery of the receiving cavity 1011 of the base 101. Then, the limiting block 102 is placed, wherein the mounting hole 1021 of the limiting block 102 is aligned with the placement hole. The corresponding parts are arranged to facilitate pushing the steel ball 204. The hexagonal recessed protrusion of the plug seat 201 is aligned with the hexagonal groove positioning cavity 1012. When the hexagonal recessed protrusion of the plug seat 201 is placed above the hexagonal groove on the base 101, the plug seat 201 is limited to prevent the plug seat 201 from rotating during the assembly process. At the same time, the positioning pin is used to limit the limiting block 102 and the base 101.

[0048] The operating part 1031 of the operating rod assembly 103 is operated so that the push rod 1033 pushes the steel ball 204 of the plug into the mounting hole 1021; specifically, the rotating end 10311 is rotated into the mounting hole 1021 so that the threaded end 10312 is threadedly connected with the internal thread opened in the mounting hole 1021, thereby driving the operating part 1031 to move forward or backward along the mounting hole 1021, and then the push rod 1033 contacts the steel ball 204 to facilitate the assembly of the plug cover 202.

[0049] Press the end cap 202 between the push rod 1033 and the steel ball to complete the assembly of the end cap 202. For details, please refer to the appendix. Figure 5 The end cap 202 has three spherical grooves 205, the positions of which correspond to the placement holes on the end cap seat 201. The end cap 202 is placed and pressed in by aligning the three spherical grooves 205 with the steel ball 204 inside the end cap seat 201. If they are not aligned, the end cap 202 can be slightly rotated after it is in place, so that the steel ball 204 pops out from the corresponding hole on the end cap 202 under the action of the spring 203, thus completing the assembly of the end cap 202. The three spherical grooves 205 on the end cap 202 match the steel ball 204. When the end cap 202 is inserted, the position of the end cap 202 can be adjusted at any time to facilitate the engagement of the steel ball 204 with the corresponding spherical groove 205.

[0050] After the end cap 202 is assembled, the push rod assembly 103 is rotated and removed; then the limit pin is removed, the limit block 102 is removed first, and finally the end cap seat 201 is separated from the base 101 and removed, so that the assembled end cap 20 can be removed.

[0051] Through the above embodiments, this application has the following beneficial effects or advantages:

[0052] 1) During assembly, this application uses a base and a limiting block to limit and position the plug seat. Then, a push rod assembly is used to compress the steel ball and spring placed inside the plug seat. Specifically, the operating part and the elastic element drive the push rod to push the steel ball, then press the steel ball in, and finally cover the plug cover. This saves manpower, requiring only one person to complete the assembly operation. It has the advantages of low cost, simple operation, and high processing efficiency.

[0053] 2) In this application, rotating the rotating end into the mounting hole causes the threaded end to connect with the internal thread in the mounting hole, thereby driving the operating part to move forward or backward along the mounting hole, and then the push rod to contact the steel ball for easy assembly of the plug cover. After assembly, the rotating end can be rotated out of the mounting hole to make the push rod exit along the mounting hole, thereby completing the assembly of the plug cover. The operation is convenient and saves manpower.

[0054] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0055] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A fixture for assembling a head cover, characterized in that, include: The base has a receiving cavity for placing the plug seat; the base also has a positioning cavity that matches the protrusion at the bottom of the plug seat; the receiving cavity is annular and located on the periphery of the positioning cavity; A limiting block is provided on the base. The limiting block is annular and has a mounting hole that penetrates the limiting block radially along the annulus. A push rod assembly, placed in the mounting hole, includes an operating part, an elastic element, and a push rod for pushing the steel ball of the plug, arranged in a radial sequence along the annulus. The limiting block is provided with several pin holes, and the base is provided with positioning holes corresponding to the pin holes. The limiting block is limited to the base by the positioning pins inserted into the pin holes and positioning holes, so as to limit and position the plug seat.

2. The end cap assembly fixture as described in claim 1, characterized in that, The base and the plug seat are detachably connected.

3. The end cap assembly fixture as described in claim 1 or 2, characterized in that, The operating part includes a rotating end and a threaded end. An internal thread is provided in the mounting hole, and the threaded end is threadedly connected to the internal thread in the mounting hole.

4. The end cap assembly fixture as described in claim 3, characterized in that, The push rod includes a first section and a second section, wherein the first section contacts the elastic element and the second section extends into the annular cavity of the limiting block.

5. The end cap assembly fixture as described in claim 4, characterized in that, The second section of the push rod has a spherical end that extends into the annular cavity of the limiting block.

6. The end cap assembly fixture as described in claim 5, characterized in that, The threaded end is also provided with a placement groove for placing the elastic element.

7. The end cap assembly fixture as described in claim 6, characterized in that, The mounting hole includes a first stepped hole, a second stepped hole, and a third stepped hole, wherein the first stepped hole, the second stepped hole, and the third stepped hole have an increasing trend. The third stepped hole has an internal thread that is threaded to the threaded end. The first stepped hole and the second stepped hole form a second movable slide area.

8. An assembly method using the end cap assembly fixture as described in any one of claims 1-7, characterized in that, Includes the following steps: The plug seat containing the spring and steel ball is placed into the receiving cavity of the base through the annular cavity of the limiting block; Operate the operating part of the push rod assembly so that the push rod pushes the steel ball of the plug into the mounting hole; Press the end cap between the push rod and the steel ball to complete the end cap assembly.

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