A high-speed train narrow space nylon sleeve taking-out device and a using method thereof

Abstract

The application discloses a high-speed motor train unit narrow space nylon sleeve taking-out device and a use method thereof. The device comprises a tensioning mechanism and a taking-out device. The tensioning mechanism comprises four tensioning parts. The tensioning part extends into the inside of one end of the skirt plate circular cavity and is provided with a head. A rod part is connected with the head. The head of the four tensioning parts is composed of a petal body. The petal body is in abutment with the end of the nylon sleeve. The rod part extends to the outside of the skirt plate circular cavity. The taking-out device is provided with a transverse ejection structure matched with the corresponding rod part. The transverse ejection structure is used for pushing the rod part and the petal body to move the nylon sleeve transversely. The nylon sleeve taking-out device is embedded into the skirt plate circular cavity through the tensioning mechanism, abuts against the end face of the nylon sleeve through the petal body, and drives one of the nylon sleeves to move through the rod part outside the petal body pushed by the transverse ejection structure. The device avoids the problem of difficult painting protection caused by the nylon sleeve not being removed, and realizes the possibility of replacing the nylon sleeve in the narrow space.

Description

Technical Field

[0001] This invention relates to the field of advanced maintenance technology for high-speed trains, and in particular to a device for removing nylon sleeves from confined spaces in high-speed trains and its usage method. Background Technology

[0002] The bogie skirts of some CR400BF EMU trains feature a nylon sleeve structure. This sleeve is a cylindrical structure with flanged ends, inserted into a circular cavity within the skirt. Due to years of operation, dust and other impurities accumulate between the nylon sleeve and the inner surface of the circular cavity, making removal difficult during advanced maintenance. In areas with sufficient space, a cylinder with the same diameter as the sleeve's tail can be used to tap it out. However, in areas with limited space, such as bi-directionally mounted nylon sleeves, this tapping method is not feasible. For skirts where the nylon sleeve cannot be removed, the current temporary solution is to leave the skirt intact after maintenance; the unremoved sleeve is shipped with the train.

[0003] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a device and method for removing nylon sleeves from confined spaces in high-speed trains. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for removing nylon sleeves in confined spaces in high-speed trains. This nylon sleeve removal device effectively solves the problem of nylon sleeves being unable to be removed in confined spaces, and can avoid the problem of difficulty in protecting the subsequent skirt painting process due to the failure to remove the nylon sleeves.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The present invention provides a device for removing nylon sleeves from confined spaces in high-speed trains, the device comprising:

[0007] A tensioning mechanism capable of extending into the circular cavity of a skirt panel with nylon sleeves installed at both ends; and an extractor that cooperates with the tensioning mechanism;

[0008] The tensioning mechanism includes four tensioning components, and each tensioning component has a head at one end that extends into the circular cavity of the skirt panel, and a rod is connected to the head.

[0009] The heads of the four tensioning parts are arranged to form a petal-shaped body, and the petal-shaped body is attached to the end of the nylon sleeve;

[0010] The rod extends to the outside of the circular cavity of the skirt plate;

[0011] The extractor has a lateral ejection structure that mates with a corresponding rod, so as to push the rod through the lateral ejection structure and push the nylon sleeve laterally through the petal body.

[0012] Furthermore, the head of the tensioning split is configured as an arc-shaped structure;

[0013] One end of the tensioning split rod is connected to the head, and the other end extends horizontally. The cross-section of the rod is an arc-shaped structure, and an arc-shaped groove is formed inside the rod.

[0014] The rods of two adjacent tensioning parts are close to each other and form a semi-circular groove that can accommodate a protruding rod or a non-protruding rod.

[0015] Furthermore, the heads of two of the tensioning components extend into the circular cavity of the skirt board from one side of the nylon sleeve, and the heads of the other two tensioning components extend into the circular cavity of the skirt board from the other side of the nylon sleeve.

[0016] The four heads are all located in the gap between the two nylon sleeves and form the petal body.

[0017] Furthermore, the extractor includes:

[0018] The extractor base is a cuboid structure with an internal extraction space.

[0019] A circular cavity fixing structure for the skirt plate located at one end of the extractor base; and a transverse ejection structure integrated at the other end of the extractor base;

[0020] The circular cavity of the skirt board, which is fitted with two nylon sleeves, is embedded in the part-retrieving space and close to the side of the circular cavity fixing structure of the skirt board. The circular cavity fixing structure of the skirt board fixes and restricts the movement of the circular cavity of the skirt board.

[0021] The lateral ejection structure contacts the rod adjacent to it and drives the internal petal body to move by pushing the rod and pushes the corresponding nylon sleeve out of the circular cavity of the skirt plate along the nylon sleeve axis.

[0022] Furthermore, the circular cavity fixing structure of the skirt panel includes:

[0023] A sliding seat is provided on the base of the extractor, and an optical bar is provided on the upper end of the sliding seat; and two fixed blocks are slidably connected to the sliding seat.

[0024] The lower part of the fixing block is a wedge-shaped body with grooves. The grooves of the two wedge-shaped bodies are used to clamp and fix the circular cavity of the skirt plate. The end of the extractor base is hollowed out. The nylon sleeve extends to the outside of the extractor base through the hollowed-out position and is clamped and fixed by the two wedge-shaped bodies.

[0025] The sliding seat has a groove, and the wedge-shaped body has a sliding protrusion that is slidably connected to the groove at the position where it mates with the groove.

[0026] Furthermore, the upper part of the fixing block is a threaded sleeve, and one end of the threaded sleeve that mates with the optical bar is provided with a sleeve.

[0027] The two threaded sleeves are internally threaded to a positive and negative screw, and the positive and negative screw are threaded to the two threaded sleeves respectively through threads with different helical directions at both ends to drive the two threaded sleeves to move in different directions.

[0028] The two sleeves are fitted onto the optical bar.

[0029] Furthermore, the lateral ejection structure includes:

[0030] A lead screw is threadedly connected to the base of the extractor;

[0031] A rolling assembly disposed at the end of the lead screw; and a first bushing connected to the lead screw via the rolling assembly and cooperating with a corresponding rod portion;

[0032] The scrolling component includes:

[0033] A loose disc, a tight disc, and a rolling disc located between the loose disc and the tight disc;

[0034] The rolling assembly that mates with the lead screw has a second bushing at one end;

[0035] One end of the first bushing is embedded in the rolling assembly and connected to the second bushing, while the other end of the second bushing abuts against the lead screw.

[0036] Furthermore, the base of the extractor is provided with two limiting protrusions;

[0037] One end of the circular cavity of the skirt board is clamped and fixed by the circular cavity fixing structure of the skirt board, and the other end of the circular cavity of the skirt board is limited by the limiting protrusion near it;

[0038] The second bushing is limited by another of the aforementioned limiting protrusions.

[0039] This invention discloses a method for using a nylon sleeve removal device in a confined space on a high-speed train. The method for removing the nylon sleeve using this confined space nylon sleeve removal device mainly includes the following steps:

[0040] S1. First, insert the heads of the two tensioning parts into the circular cavity of the skirt board from one side of the nylon sleeve. Then, insert the heads of the other two tensioning parts into the circular cavity of the skirt board from the other side of the nylon sleeve. After rotating them at a certain angle, assemble the four heads into a petal-shaped body that can fit with the end of the nylon sleeve, and install the protruding rod and the non-protruding rod.

[0041] S2. Use the extractor to remove the nylon sleeve.

[0042] Furthermore, the specific steps for the extractor to remove the nylon sleeve are as follows:

[0043] S201. Insert the positive and negative lead screws into the threaded sleeves of the two fixed blocks, and rotate the positive and negative lead screws to bring the two fixed blocks closer to each other.

[0044] S202, Insert the first bushing, the second bushing, and the rolling assembly into one end of the rod;

[0045] S203. Use the positive and negative lead screws to drive two fixed blocks to clamp one end of the circular cavity of the skirt board. At this time, the other end of the circular cavity of the skirt board is stuck at the limit protrusion.

[0046] S204. Rotate the lead screw and drive the first bushing push rod to push out a nylon sleeve at a distance, completing the removal operation of one of the nylon sleeves.

[0047] The present invention provides a nylon sleeve removal device for confined spaces in high-speed trains, which has the following beneficial effects:

[0048] The nylon sleeve removal device of the present invention is embedded in the circular cavity of the skirt board through a tensioning mechanism and uses a petal body to abut against the end face of the nylon sleeve. Then, the remover pushes the rod outside the petal body to drive one of the nylon sleeves to move. This device can remove the nylon sleeve in a narrow space to meet the requirements of all-round cleaning of the skirt board and avoid the problem of difficulty in subsequent coating protection caused by the nylon sleeve not being removed. It realizes the possibility of occasional replacement and necessary replacement of nylon sleeve in a narrow space. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0050] Figure 1This is a schematic diagram of the tensioning split structure of a nylon sleeve removal device for a confined space in a high-speed train, as disclosed in an embodiment of the present invention.

[0051] Figure 2 This is a schematic diagram of the structure of a tensioning mechanism for a high-speed train nylon sleeve removal device in a confined space, as disclosed in an embodiment of the present invention, after being combined with the nylon sleeve.

[0052] Figure 3 This is a schematic diagram of the tensioning mechanism of a nylon sleeve removal device for a high-speed train in a confined space, as disclosed in an embodiment of the present invention.

[0053] Figure 4 This is a schematic diagram of the structure of the protruding rod of a nylon sleeve removal device for a high-speed train in a confined space, as disclosed in an embodiment of the present invention.

[0054] Figure 5 This is a schematic diagram of the structure of a non-protruding rod of a nylon sleeve removal device for a high-speed train in a confined space, as disclosed in an embodiment of the present invention.

[0055] Figure 6 This is a schematic diagram of the working state of the tensioning mechanism of a nylon sleeve removal device for a high-speed train in a confined space, as disclosed in an embodiment of the present invention.

[0056] Figure 7 This is a schematic diagram of a high-speed train nylon sleeve removal device for narrow spaces, disclosed in an embodiment of the present invention, in which the internal gap of the circular cavity of the skirt is divided into three spaces;

[0057] Figure 8 This is a diagram showing the cross-sectional dimensions of the head and rod of a nylon sleeve removal device for a confined space in a high-speed train, as disclosed in an embodiment of the present invention.

[0058] Figure 9 This is a schematic diagram of the structure of the extractor of a nylon sleeve removal device for a confined space in a high-speed train, as disclosed in an embodiment of the present invention.

[0059] Figure 10 This is an exploded view of the structure of the extractor of a nylon sleeve removal device for a high-speed train in a confined space, as disclosed in an embodiment of the present invention.

[0060] Explanation of reference numerals in the attached figures:

[0061] 100. Nylon sleeve; 200. Circular cavity in the skirt panel;

[0062] 210. First Space; 220. Second Space; 230. Third Space;

[0063] 10. Tensioning mechanism; 20. Extractor;

[0064] 11. Petal-shaped body;

[0065] 101. Head; 102. Rod; 103. Protruding rod; 104. Non-protruding rod;

[0066] 3. Extractor base; 4. Skirt plate circular cavity fixing structure; 5. Lateral ejection structure;

[0067] 301. Limiting protrusion;

[0068] 401. Sliding seat; 402. Guide bar; 403. Lead screw; 404. Threaded sleeve; 405. Sleeve; 406. Wedge; 407. Groove; 408. Slide groove; 409. Sliding protrusion;

[0069] 501. Lead screw; 502. First bushing; 503. Second bushing; 504. Tightening plate; 505. Loosening plate; 506. Rolling plate. Detailed Implementation

[0070] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0071] See Figures 1 to 10 As shown;

[0072] This embodiment provides a nylon sleeve removal device for confined spaces in high-speed trains. The nylon sleeve removal device includes:

[0073] A tensioning mechanism 10 that can extend into the circular cavity 200 of the skirt panel, which is fitted with nylon sleeves 100 at both ends; and an extractor 20 that cooperates with the tensioning mechanism 10.

[0074] See Figures 1 to 8 As shown, the tensioning mechanism 10 includes four tensioning parts 1, and each tensioning part 1 has a head 101 at one end that extends into the circular cavity 200 of the skirt panel, and a rod 102 is connected to the head 101.

[0075] The heads 101 of the four tensioned parts 1 form a petal body 11, and the petal body 11 is attached to the end of the nylon sleeve 100.

[0076] The rod 102 extends to the outside of the circular cavity 200 of the skirt plate;

[0077] The extractor 20 has a lateral ejection structure 5 that engages with the corresponding rod 102, so as to push the rod 102 through the lateral ejection structure 5 and push the nylon sleeve 100 to move laterally through the petal body 11.

[0078] Specifically, this embodiment discloses a nylon sleeve removal device suitable for removing a nylon sleeve 100 that is bidirectionally installed in a circular cavity of a skirt in a confined space. The removal device consists of two mechanisms: a tensioning mechanism 10 and a remover 20 that cooperates with the tensioning mechanism 10.

[0079] In this embodiment, the tensioning mechanism 10 is divided into four tensioning parts 1. The head 101 of each tensioning part 1 can be independently inserted from the inside of the nylon sleeve 100 and into the circular cavity 200 of the skirt. After being inserted in sequence, the four heads 101 approach each other and combine to form a petal body 11. The petal body 11 can abut against the end of the nylon sleeve 100 and is located in the gap between two nylon sleeves 100, thereby pushing out one of the nylon sleeves 100 at the far end by means of the thrust of the external extractor 20.

[0080] The nylon sleeve removal device disclosed in this embodiment solves the problem of the nylon sleeve 100 being unable to be removed in a confined space. After the nylon sleeve 100 is removed, the dust on the inner surface of the circular cavity 200 of the skirt board can be cleaned. This avoids the problem of difficulty in protecting the subsequent skirt board painting process due to the nylon sleeve 100 not being removed. It also avoids the problem of the nylon sleeve 100 being unable to be removed due to occasional damage on its surface. This solves the problem of the nylon sleeve 100 being unable to be removed due to the need for replacement during level 5 repairs, thus improving the quality of maintenance.

[0081] Preferably, the head 101 of the tensioning split body 1 in this embodiment is configured as an arc-shaped structure;

[0082] One end of the rod 102 of the tensioning split body 1 is connected to the head 101, and the other end extends horizontally. The cross section of the rod 102 is an arc-shaped structure, and the inside of the rod 102 forms an arc-shaped groove.

[0083] The rods 102 of two adjacent tensioning parts 1 are close to each other and form a semi-circular groove that can accommodate the protruding rod 103 or the non-protruding rod 104.

[0084] Two of the tensioning parts 1 have their heads 101 inserted into the circular cavity 200 of the skirt board from one side of one of the nylon sleeves 100, while the other two tensioning parts 1 have their heads 101 inserted into the circular cavity 200 of the skirt board from the other side of the nylon sleeve 100.

[0085] The four heads 101 are all located in the gap between the two nylon sleeves 100 and form a petal body 11.

[0086] In this embodiment, the heads 101 of the four tensioning parts 1 of the tensioning mechanism 10 need to be inserted sequentially from the inside of the corresponding nylon sleeve 100 into the circular cavity 200 of the skirt, and then reassembled into a petal body 11 by rotating it at a certain angle inside, and the petal body 11 is used to abut against the end of the nylon sleeve 100.

[0087] The specific method for inserting the petal body 11 inside in this embodiment is as follows: First, the thickness of the head 101 of the tensioning split body 1 in this embodiment is 3mm. This application divides the gap between the two nylon sleeves 100 (the gap width along the axial direction is 10mm) into three equal parts along the axial direction, namely the first space 210, the second space 220, and the third space 230. See [link to relevant documentation]. Figure 5 As shown, the widths of the first space 210, the second space 220, and the third space 230 are all slightly larger than the thickness of the head 101, allowing the head 101 to stay and rotate within the aforementioned three spaces. The head 101 of the first tensioning split 1 is inserted into the right nylon sleeve 100. When the head 101 is in the third space 230, the tensioning split 1 is rotated, and the rod 102 is pressed against the inner surface of the nylon sleeve 100. The head 101 of the second tensioning split 1 is also inserted into the right nylon sleeve 100. When the head 101 is in the second space 220, the head 101 is rotated and the head 101 of the second tensioning split 1 is retracted into the third space 230 and pressed against the head 101 of the first tensioning split 1. A non-protruding rod 104 is inserted to fix the two heads 101. Subsequently, using the first space 210 and the second space 220, the heads 101 of the other two tensioning splits 1 are inserted into the left nylon sleeve 100 in the same manner, and a protruding rod 103 is inserted to fix the other two heads 101. Because the head 101 of the petal body 11 and the protrusion of the protrusion of the protrusion 103 have rounded corners with a radius of 1mm, the four heads 101 can be easily pressed tightly against the end face of the nylon sleeve 100. After assembly, the nylon sleeve 100 is removed using the extractor 20.

[0088] See Figure 8 As shown, Figure 8 A diagram showing the cross-sectional dimensions of the head 101 and the rod 102 of this application is provided; in this embodiment, the inner diameter of the nylon sleeve 100 is 10mm, and the outer diameter of the nylon sleeve 100 and the inner diameter of the circular cavity 200 of the skirt are both 18mm. According to... Figure 8The cross-sectional design of the head 101 and rod 102 ensures that the first tensioning component can smoothly extend into the nylon sleeve 100 without interfering with the inner surface of the nylon sleeve 100. After the head 101 of the first tensioning component is in contact with the end of the nylon sleeve 100 and the rod 102 is in contact with the inner surface of the nylon sleeve 100, the second tensioning component can extend in. The second tensioning component will not interfere with the rod 102 of the first tensioning component. When the second tensioning component rotates, its head 101 will not interfere with the inner surface of the circular cavity 200 of the skirt plate, and its rod 102 will not interfere with the rod of the first tensioning component, allowing for free rotation. This enables both tensioning components to smoothly extend into the same nylon sleeve 100. In this embodiment, the outer diameter of the petal body 11 is equal to the outer diameter of the nylon sleeve 100, both being 18mm. This maximizes the contact area between the petal body 11 and the end of the nylon sleeve 100 while ensuring that the tensioning components can smoothly extend into the nylon sleeve 100. At the same pressure, the larger the contact area, the greater the pressure. Increasing the contact area can maximize the pushing effect of the petal body 11.

[0089] See Figures 9 to 10 As shown, preferably, the extractor 20 in this embodiment includes:

[0090] The extractor base 3 is a cuboid structure with an internal extraction space.

[0091] A circular cavity fixing structure 4 for the skirt plate located at one end of the extractor base 3; and a transverse ejection structure 5 integrated at the other end of the extractor base 3;

[0092] The circular cavity 200 of the skirt board, which is equipped with two nylon sleeves 100, is embedded in the part removal space and close to the side of the circular cavity fixing structure 4 of the skirt board. The circular cavity fixing structure 4 of the skirt board fixes and restricts the movement of the circular cavity 200 of the skirt board.

[0093] The lateral ejection structure 5 contacts the rod 102 near it and drives the internal petal body 11 to move by pushing the rod 102 and pushing the corresponding nylon sleeve 100 out of the skirt circular cavity 200 along the axial direction of the nylon sleeve 100.

[0094] The skirt plate circular cavity fixing structure 4 in this embodiment includes:

[0095] A sliding seat 401 is provided on the base 3 of the extractor, and an optical bar 402 is provided on the upper end of the sliding seat 401; and two fixed blocks are slidably connected to the sliding seat 401.

[0096] The lower part of the fixing block is a wedge-shaped body 406 with a groove. The grooves 407 of the two wedge-shaped bodies 406 are inserted between the flange of the nylon sleeve 100 and the circular cavity 200 of the skirt plate to clamp and fix the circular cavity 200 of the skirt plate. The end of the extractor base 3 is hollowed out. The nylon sleeve 100 extends to the outside of the extractor base 3 through the hollowed-out position and is clamped and fixed by the two wedge-shaped bodies 406.

[0097] The sliding seat 401 has a groove 408, and the wedge 406 has a sliding protrusion 409 that is slidably connected to the groove 408 at the position where it mates with the groove 408.

[0098] In this embodiment, the upper part of the fixing block is a threaded sleeve 404, and the threaded sleeve 404 is fitted with a sleeve 405 at one end of the optical bar 402.

[0099] Two threaded sleeves 404 are internally threaded to a positive and negative screw 403, and the positive and negative screw 403 is threaded to the two threaded sleeves 404 respectively through the threads at its two ends with different helical directions to drive the two threaded sleeves 404 to move in different directions.

[0100] Two sleeves 405 are fitted onto the optical bar 402.

[0101] Preferably, the lateral ejection structure 5 in this embodiment includes:

[0102] The lead screw 501 is threadedly connected to the base 3 of the extractor;

[0103] A rolling assembly disposed at the end of the lead screw 501; and a first bushing 502 connected to the lead screw 501 via the rolling assembly and cooperating with the corresponding rod portion 102;

[0104] The scrolling component includes:

[0105] Loose disc 505, tight disc 504, and rolling disc 506 located between loose disc 505 and tight disc 504;

[0106] A second bushing 503 is provided at one end of the rolling assembly that mates with the lead screw 501.

[0107] One end of the first bushing 502 is embedded in the rolling assembly and connected to the second bushing 503, while the other end of the second bushing 503 abuts against the lead screw 501.

[0108] Two limiting protrusions 301 are provided inside the base 3 of the extractor;

[0109] One end of the circular cavity 200 of the skirt board is clamped and fixed by the circular cavity fixing structure 4 of the skirt board, and the other end of the circular cavity 200 of the skirt board is limited by the limiting protrusion 301 near it.

[0110] The second bushing 503 is limited by another limiting protrusion 301.

[0111] This invention discloses a method for using a nylon sleeve remover for confined spaces in high-speed trains. The method for removing nylon sleeves using this confined space nylon sleeve remover mainly includes the following steps:

[0112] S1. First, insert the heads 101 of the two tensioning parts 1 into the circular cavity 200 of the skirt board from one side of the nylon sleeve 100 in sequence. Then, insert the heads 101 of the other two tensioning parts 1 into the circular cavity 200 of the skirt board from the other side of the nylon sleeve 100 in sequence. After rotating them at a certain angle, assemble the four heads 101 into a petal body 11 that can fit with the end of the nylon sleeve 100, and install the protruding rod 103 and the non-protruding rod 104.

[0113] S2. Use the extractor 20 to remove the nylon sleeve 100.

[0114] Furthermore, the specific steps for the extractor 20 to remove the nylon sleeve 100 are as follows:

[0115] S201. Insert the positive and negative lead screws 403 into the threaded sleeves 404 of the two fixed blocks, and rotate the positive and negative lead screws 403 to bring the two fixed blocks closer to each other.

[0116] S202, Insert the first bushing 502, the second bushing 503 and the rolling assembly into one end of the rod 102;

[0117] S203. Using the positive and negative lead screws 403 to drive two fixing blocks to clamp one end of the fixed skirt plate circular cavity 200, at this time the other end of the skirt plate circular cavity 200 is stuck at the limiting protrusion 301.

[0118] S204. Rotate the lead screw 501 and drive the first bushing 502 to push the rod 102 and push out a nylon sleeve 100 at a distance, completing the removal operation of one of the nylon sleeves 100.

[0119] The present invention provides a nylon sleeve remover for confined spaces in high-speed trains, which has the following advantages:

[0120] The nylon sleeve removal device of the present invention is embedded in the circular cavity 200 of the skirt board through the tensioning mechanism 10 and abuts against the end face of the nylon sleeve 100 by the petal body 11. Then, the remover 20 pushes the rod 102 outside the petal body 11 to drive one of the nylon sleeves 100 to move. This device can remove the nylon sleeve 100 in a narrow space to meet the requirements of all-round cleaning of the skirt board and avoid the problem of difficulty in subsequent coating protection caused by the nylon sleeve 100 not being removed. It realizes the possibility of occasional replacement and necessary replacement of the nylon sleeve 100 in a narrow space.

[0121] The thrust roller bearing used in the nylon sleeve removal device of the present invention is suitable for applications with large axial forces. Since there are gaps after the first bushing 502, the second bushing 503, and the lead screw 501 are assembled, the first bushing 502 and the petal body 11 do not rotate during the pushing process, while only the second bushing 503 and the lead screw 501 rotate, thus avoiding wear of the nylon sleeve 100 caused by rotation. Furthermore, the end of the petal body 11, the first bushing 502, and the lead screw 501 are all connected by an insertion relationship, thus avoiding bending deformation and damage caused by misalignment of the axes during the pushing process.

[0122] The limiting protrusion 301 inside the extractor base 3 of the present invention can both lock the edge of the nylon sleeve 100, positioning the wedge-shaped body 406 of the left and right fixing blocks to be inserted into the gap between the flange of the nylon sleeve 100 and the circular cavity 200 of the skirt plate, thus preventing the nylon sleeve 100 and the circular cavity 200 of the skirt plate from being damaged by the wedge-shaped body 406, and lock the second bushing 503, thus ensuring that the bearing tightening plate 504, loosening plate 505 and rolling plate 506 are installed in the correct position, thus preventing the rolling plate 506 from falling off and being damaged when the lead screw 501 is rotated.

[0123] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A method for using a narrow-space nylon sleeve extraction device for high-speed trains, the narrow-space nylon sleeve extraction device comprising: a tensioning mechanism (10) capable of extending into the inside of a skirt panel circular cavity (200) in which both ends are provided with a nylon sleeve (100); and an extractor (20) cooperating with the tensioning mechanism (10); the tensioning mechanism (10) comprises four tensioning parts (1), and one end of the tensioning part (1) extending into the inside of the skirt panel circular cavity (200) is provided with a head (101), and a rod (102) is connected to the head (101); the head (101) of the four tensioning parts (1) is composed of a petal body (11), and the petal body (11) abuts against the end of the nylon sleeve (100); the rod (102) extends to the outside of the skirt panel circular cavity (200); the extractor (20) is provided with a transverse ejection structure (5) cooperating with the corresponding rod (102), so as to push the rod (102) through the transverse ejection structure (5) and push the nylon sleeve (100) to move transversely through the petal body (11); the extractor (20) comprises: an extractor base (3) which is a cuboid structure and has an inside extraction space; a skirt panel circular cavity fixing structure (4) located at one end of the extractor base (3); and the transverse ejection structure (5) integrated at the other end of the extractor base (3); the skirt panel circular cavity (200) provided with two nylon sleeves (100) is embedded in the extraction space and close to one side of the skirt panel circular cavity fixing structure (4), and the skirt panel circular cavity fixing structure (4) fixes and limits the movement of the skirt panel circular cavity (200); the transverse ejection structure (5) contacts the rod (102) close to it and drives the petal body (11) inside to move and pushes the corresponding nylon sleeve (100) to move out of the skirt panel circular cavity (200) along the axis of the nylon sleeve (100) by pushing the rod (102); characterized in that the method for extracting the nylon sleeve (100) by using the narrow-space nylon sleeve extraction device comprises the following steps: S1, first, sequentially extend the heads (101) of two tensioning parts (1) into the skirt panel circular cavity (200) from one side of one of the nylon sleeves (100), and then sequentially extend the heads (101) of the other two tensioning parts (1) into the skirt panel circular cavity (200) from one side of the other nylon sleeve (100), and after rotating by a certain angle, the four heads (101) are composed of the petal body (11) capable of cooperating with the end of the nylon sleeve (100), and the protruding rod (103) and the non-protruding rod (104) are installed; S2, extracting the nylon sleeve (100) by using the extractor (20), and the specific steps are as follows: S201, inserting the lead screw (403) into the threaded sleeve (404) of the two fixed blocks, and rotating the lead screw (403) to make the two fixed blocks close to each other; ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ S202, insert the first bushing (502), the second bushing (503) and the rolling assembly into one end of the rod part (102); S203, drive two fixed blocks to clasp and fix one end of the skirt circular cavity (200) by using the reversible screw rod (403), at this time, the other end of the skirt circular cavity (200) is clamped at the limiting protrusion (301); S204, rotate the screw rod (501) and drive the first bushing (502) to push the rod part (102) and push out a nylon sleeve (100) far away, and complete the taking-out operation of one of the nylon sleeves (100).

2. The use of the high-speed train narrow space nylon sleeve taking-out device according to claim 1, characterized in that, The head (101) of the tensioning part (1) is configured as an arc structure; One end of the rod part (102) of the tensioning part (1) is connected with the head (101), the other end extends horizontally, and the cross section of the rod part (102) is an arc structure, and the inside of the rod part (102) is formed as an arc-shaped groove; The rod parts (102) of two adjacent tensioning parts (1) are close to each other and form a semicircular groove capable of accommodating a protruding stick (103) or a non-protruding stick (104).

3. The use of the high-speed EMU narrow space nylon sleeve taking-out device according to claim 2, characterized in that, The heads (101) of two of the tensioning parts (1) are inserted into the inside of the skirt circular cavity (200) from one side of one of the nylon sleeves (100), and the heads (101) of the other two tensioning parts (1) are inserted into the inside of the skirt circular cavity (200)from one side of the other nylon sleeve (100); The four heads (101) are located in the gap between the two nylon sleeves (100) and form the petal body (11).

4. The use of the high-speed EMU narrow space nylon sleeve taking-out device according to claim 3, characterized in that, The skirt circular cavity fixing structure (4) comprises: A sliding seat (401) provided on the extractor base (3), and a light rod (402) provided at the upper end of the sliding seat (401); and Two fixed blocks slidingly connected to the sliding seat (401); The lower part of the fixed block is a wedge-shaped body (406) with a groove (407), the grooves (407) of the two wedge-shaped bodies (406) are inserted between the turned edge of the nylon sleeve (100) and the skirt circular cavity (200), so as to clasp and fix the skirt circular cavity (200), and the end of the extractor base (3) is hollow, the nylon sleeve (100) extends to the outside of the extractor base (3) through the hollow position, and the skirt circular cavity (200) is clamped and fixed by the two wedge-shaped bodies (406); The sliding seat (401) has a sliding groove (408), and the position where the wedge-shaped body (406) cooperates with the sliding groove (408) has a sliding protrusion (409) slidingly connected in the sliding groove (408).

5. The use of the high-speed EMU narrow space nylon sleeve taking-out device according to claim 4, characterized in that, The upper part of the fixed block is a threaded sleeve (404), and the threaded sleeve (404) is provided with a sleeve (405) at one end in cooperation with the light rod (402); One reversible screw rod (403) is threadedly connected in the two threaded sleeves (404), and the reversible screw rod (403) is threadedly connected with the two threaded sleeves (404) through the threads with different screw directions at the two ends, so as to drive the two threaded sleeves (404) to move towards different directions; Two sleeves (405) are sleeved on the light pole (402).

6. The use of a high-speed train narrow space nylon sleeve extraction device according to claim 1, characterized in that, The transverse ejection structure (5) comprises: A screw rod (501) is threadedly connected to the extractor base (3); A rolling assembly is arranged at an end of the screw rod (501); and a first bushing (502) is connected with the screw rod (501) through the rolling assembly and cooperates with a corresponding rod portion (102); The rolling assembly comprises: A loose disc (505), a tight disc (504), and a rolling disc (506) between the loose disc (505) and the tight disc (504); One end of the rolling assembly matched with the screw rod (501) is provided with a second bushing (503); One end of the first bushing (502) is embedded in the rolling assembly and connected with the second bushing (503), and the other end of the second bushing (503) abuts against the screw rod (501).

7. The use of a high-speed train narrow space nylon sleeve extraction device according to claim 6, characterized in that, Two limiting protrusions (301) are arranged in the extractor base (3); One end of the apron circular cavity (200) is clamped and fixed through the apron circular cavity fixing structure (4), and the other end of the apron circular cavity (200) is limited through the limiting protrusion (301) close to the apron circular cavity (200); The second bushing (503) is limited through another limiting protrusion (301).

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