Nylon sleeve extractor

Abstract

The utility model relates to a nylon sleeve extractor, relates to the technical field of railway engineering line maintenance, and is used for solving the problem that a nylon sleeve is difficult to take out due to the fact that a cross-shaped notch in the nylon sleeve is damaged or no cross-shaped notch exists in the nylon sleeve. The nylon sleeve extractor comprises a supporting cylinder used for being inserted into a nylon sleeve to be extracted; the cross-shaped screwing structure is arranged on the supporting cylinder, and the cross-shaped screwing structure can be clamped in a cross-shaped groove in the end part of the nylon sleeve; the body nut is arranged on the cross-shaped screwing structure; and the rotary pressing mechanism is rotatably arranged in the body nut, the cross-shaped screwing structure and the supporting cylinder. The rotary pressing mechanism is rotated to enable part of the rotary pressing mechanism to extend out of the outer peripheral wall of the supporting cylinder and to be pressed on the inner hole wall of the nylon sleeve, so that rotary friction force is applied to the inner hole wall of the nylon sleeve, and the nylon sleeve can be rotationally taken out from the sleeper under the action of the rotary friction force.

Description

Technical Field

[0001] The utility model relates to the technical field of railway track maintenance, and particularly to a nylon sleeve extractor. Background Art

[0002] The embedded nylon sleeve of the turnout concrete sleeper is affected by adverse factors such as turnout crushing and wear at the frog part, and is subjected to large forces. It is easily damaged by the switch sleeper bolts, resulting in the nylon sleeve being broken into two sections in the middle or the internal nylon thread of the sleeve being damaged. When replacing, the following situations may cause the existing self-made cross wrench to be unable to remove the nylon sleeve. For example, the nylon sleeve is weathered and the material becomes brittle. When the cross wrench is screwed out in the reverse direction, the cross notch is damaged; for the later nylon sleeve aftermarket accessories and the newly laid turnout, the nylon sleeves have flush ports and no cross notch, so the cross wrench cannot be used to screw out the nylon sleeve; for the nylon sleeve accessories without a cross notch, the workers manually saw a cross notch with a hacksaw bow, resulting in the cross notches not being at right angles. When using the cross wrench to screw out, only one notch may be stressed, causing them to break one by one; after half of the nylon sleeve is broken off in the switch sleeper, it cannot be removed with a cross wrench. Therefore, when the nylon sleeve ages and breaks, the existing cross wrench cannot screw out the cross notch that is damaged or the half of the nylon sleeve broken off inside the sleeper. When dealing with this problem at the railway track maintenance site, it is time-consuming and laborious, bringing trouble to the daily operation of the staff.

[0003] That is to say, in the prior art, there is a problem that it is difficult to remove the nylon sleeve due to the damage of the cross notch on the nylon sleeve or the absence of the cross notch thereon. Summary of the Utility Model

[0004] The utility model provides a nylon sleeve extractor for solving the problem that it is difficult to remove the nylon sleeve due to the damage of the cross notch on the nylon sleeve or the absence of the cross notch thereon.

[0005] The utility model provides a nylon sleeve extractor. The nylon sleeve is inserted into the sleeper and is threadedly connected with the sleeper. The nylon sleeve extractor includes:

[0006] A support cylinder for inserting into the nylon sleeve to be removed; and

[0007] A cross screwing structure provided on the support cylinder, and the cross screwing structure can be clamped in the cross notch at the end of the nylon sleeve; and

[0008] A body nut provided on the cross screwing structure; and

[0009] A rotary pressing mechanism rotatably provided in the body nut, the cross screwing structure and the support cylinder;

[0010] Among them, the central axis of the rotary pressing mechanism is eccentrically arranged with the central axis of the support cylinder. The nylon sleeve extractor is configured such that when the cross-shaped screwing structure is engaged in the cross-shaped groove, the rotary pressing mechanism is rotated, and a part of the rotary pressing mechanism can extend out of the outer peripheral wall of the support cylinder and press against the inner hole wall of the nylon sleeve. By rotating the rotary pressing mechanism, the nylon sleeve can be removed from the sleeper, or the body nut can be rotated to rotate the nylon sleeve out of the sleeper.

[0011] In one embodiment, the support cylinder, the cross-shaped screwing structure, and the body nut are coaxially arranged.

[0012] In one embodiment, the rotary pressing mechanism includes:

[0013] A central axis main body, which is inserted into the support cylinder, the cross-shaped screwing structure, and the body nut; and

[0014] A central axis nut, which is arranged at the top end of the central axis main body and is located above the body nut; and

[0015] A lower expander, which is arranged at the bottom end of the central axis main body and is located below the support cylinder;

[0016] Among them, screwing the central axis nut can drive the central axis main body and the lower expander to rotate, so that a part of the lower expander can extend out of the outer peripheral wall of the support cylinder and press against the inner hole wall of the nylon sleeve.

[0017] In one embodiment, a hollow cavity communicating with its interior is provided on the outer peripheral wall of the support cylinder. The rotary pressing mechanism further includes an upper expander located above the lower expander. Screwing the central axis nut can drive the central axis main body and the upper expander to rotate, so that a part of the upper expander can extend out of the outer peripheral wall from the hollow cavity and press against the inner hole wall of the nylon sleeve.

[0018] In one embodiment, the lower expander and the upper expander are rectangular steel plates, and the central axis main body is a rod-shaped structure.

[0019] In one embodiment, the cross-shaped screwing structure includes a cylinder body and four clamping arms arranged on the outer periphery of the cylinder body. The four clamping arms are spaced apart on the outer periphery of the cylinder body and can be simultaneously engaged in the cross-shaped groove.

[0020] In one embodiment, the cross-shaped screwing structure includes two clamping arms arranged in a cross shape. A through hole is provided at the cross part of the two clamping arms, and the rotary pressing mechanism is inserted into the through hole.

[0021] In one embodiment, the nylon sleeve extractor further includes a locking mechanism. The locking mechanism is arranged on the body nut, and the rotary pressing mechanism is rotatably arranged in the locking mechanism. The locking mechanism is used to fix the pressing position where the rotary pressing mechanism presses against the inner hole wall of the nylon sleeve.

[0022] In one embodiment, the locking mechanism is a ratchet mechanism, which includes:

[0023] A hollow self-locking box, which is arranged on the body nut, and the rotary pressing mechanism is rotatably arranged in the hollow self-locking box; and

[0024] A ratchet main body, which is sleeved on the outer periphery of the rotary pressing mechanism and is located in the hollow self-locking box; and

[0025] A pawl, which is hinged in the hollow self-locking box and cooperates with the ratchet main body;

[0026] A pressing assembly, which is arranged on the inner wall of the hollow self-locking box;

[0027] Wherein, the pressing assembly can press the pawl on the ratchet main body to prevent the ratchet main body from rotating in the first rotation direction, and the first rotation direction is the reverse direction of the rotation direction for the rotary pressing mechanism to take out the nylon sleeve.

[0028] In one embodiment, the pressing assembly includes:

[0029] A spring main body, one end of which is fixed in the hollow self-locking box; and

[0030] An arc-shaped stop head, which is connected to the other end of the spring main body;

[0031] Wherein, the spring main body can apply a spring force to the arc-shaped stop head so that the arc-shaped stop head can press the pawl in the groove of the ratchet main body to prevent the ratchet main body from rotating in the first direction.

[0032] Compared with the prior art, the advantages of the present utility model are as follows: a rotary pressing mechanism is provided. By rotating the rotary pressing mechanism, a part of it can extend out of the outer peripheral wall of the support cylinder and press against the inner hole wall of the nylon sleeve, thereby applying a rotational frictional force to the inner hole wall of the nylon sleeve. Under the action of this rotational frictional force, the nylon sleeve can be rotated and taken out from the sleeper. This avoids the problem that the cross slot at the end of the nylon sleeve is damaged or the nylon sleeve extractor cannot be used normally due to the absence of a cross slot. In addition, a cross screwing structure is integrally provided in this application. When the cross slot is intact, the nylon sleeve can be rotated and taken out by rotating the body nut to drive the cross screwing structure to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Hereinafter, the present utility model will be described in more detail based on embodiments and with reference to the drawings.

[0034] Figure 1 is a schematic structural composition diagram of the nylon sleeve extractor according to the first embodiment of the present utility model;

[0035] Figure 2It is a schematic structural composition diagram of the nylon sleeve extractor according to the second embodiment of the present utility model;

[0036] Figure 3 is Figure 2 a schematic diagram of another angle of the nylon sleeve extractor in

[0037] Figure 4 is Figure 2 a top view of the nylon sleeve extractor in

[0038] Figure 5 is Figure 2 a schematic internal structure diagram of the locking mechanism in

[0039] Reference numerals:

[0040] 10. Support cylinder; 11. Hollow cavity; 20. Cross screwing structure; 30. Body nut; 40. Rotating pressing mechanism; 41. Central axis main body; 42. Central axis nut; 43. Lower expander; 44. Upper expander; 50. Locking mechanism; 51. Ratchet main body; 52. Pawl; 53. Pressing component; 531. Spring main body; 532. Arc-shaped stop head; 54. Hollow self-locking box; 55. Auxiliary shaft; 551. Arc-shaped inner concave part. Detailed implementation manners

[0041] The present utility model will be further described below with reference to the accompanying drawings.

[0042] Embodiment 1

[0043] As Figure 1 shown, the present utility model provides a nylon sleeve extractor. The nylon sleeve is inserted into the sleeper and is threadedly connected to the sleeper. The nylon sleeve extractor includes a support cylinder 10, a cross screwing structure 20, a body nut 30, and a rotating pressing mechanism 40. Among them, the support cylinder 10 is used to be inserted into the nylon sleeve to be removed; the cross screwing structure 20 is arranged on the support cylinder 10, and the cross screwing structure 20 can be clamped in the cross groove at the end of the nylon sleeve; the body nut 30 is arranged on the cross screwing structure 20; the rotating pressing mechanism 40 is rotatably arranged in the body nut 30, the cross screwing structure 20, and the support cylinder 10; the central axis of the rotating pressing mechanism 40 is eccentric with the central axis of the support cylinder 10. The nylon sleeve extractor is configured such that when the cross screwing structure 20 is clamped into the cross groove, by rotating the rotating pressing mechanism 40, a part of the rotating pressing mechanism 40 can extend out of the outer peripheral wall of the support cylinder 10 and press against the inner hole wall of the nylon sleeve, and the nylon sleeve can be removed from the sleeper by rotating the rotating pressing mechanism 40, or the nylon sleeve can be rotated out of the sleeper by rotating the body nut 30.

[0044] In the above setting, a rotary pressing mechanism 40 is provided. By rotating the rotary pressing mechanism 40, a part of it can extend out of the outer peripheral wall of the support cylinder 10 and press against the inner hole wall of the nylon sleeve, thereby applying a rotational frictional force to the inner hole wall of the nylon sleeve. Under the action of this rotational frictional force, the nylon sleeve can be rotated and removed from the sleeper. This avoids the problem that the cross slot at the end of the nylon sleeve is damaged or there is no cross slot, resulting in the inability to normally use the nylon sleeve extractor. In addition, in the present application, a cross screwing structure 20 is integrally provided. When the cross slot is intact, the nylon sleeve can be rotated and removed by rotating the body nut 30 to drive the cross screwing structure 20 to rotate.

[0045] It should be noted that when the cross slot is intact, the user can choose to rotate the body nut 30 or rotate the rotary pressing mechanism 40 to complete the rotation and removal of the nylon sleeve. In the present application, the method of rotating the rotary pressing mechanism 40 has high stability and can ensure the removal of the nylon sleeve. Thus, the nylon sleeve extractor has high practicability.

[0046] It should be noted that since the central axis of the rotary pressing mechanism 40 is eccentrically arranged with respect to the central axis of the support cylinder 10, that is, the central axis of the rotary pressing mechanism 40 is not coaxial with the central axis of the support cylinder 10. In this way, the rotary pressing mechanism 40 can rotate around its own central axis to extend out of the outer peripheral wall of the support cylinder 10 and press against the inner hole wall of the nylon sleeve.

[0047] Of course, according to the actual situation, the cross screwing structure 20 can be not provided, and the rotary pressing mechanism 40 can be directly used to realize the rotation and removal function of the nylon sleeve extractor.

[0048] Specifically, as Figure 1 shown, in one embodiment, the support cylinder 10, the cross screwing structure 20 and the body nut 30 are coaxially arranged. This ensures that the rotary pressing mechanism 40 can rotate normally inside the nylon sleeve extractor.

[0049] Specifically, as Figure 1 shown, in one embodiment, the rotary pressing mechanism 40 includes a central axis main body 41, a central axis nut 42, and a lower expander 43. Among them, the central axis main body 41 is inserted into the support cylinder 10, the cross screwing structure 20 and the body nut 30; the central axis nut 42 is arranged at the top of the central axis main body 41 and is located above the body nut 30; the lower expander 43 is arranged at the bottom of the central axis main body 41 and is located below the support cylinder 10; screwing the central axis nut 42 can drive the central axis main body 41 and the lower expander 43 to rotate, so that a part of the lower expander 43 can extend out of the outer peripheral wall of the support cylinder 10 and press against the inner hole wall of the nylon sleeve.

[0050] In the above setting, by rotating the rotary pressing mechanism 40, a part of its lower expander 43 can extend from the bottom of the support cylinder 10 to the outer peripheral wall of the support cylinder 10 and press against the inner hole wall of the nylon sleeve, so as to apply a rotational frictional force to the inner hole wall of the nylon sleeve. Under the action of this rotational frictional force, the nylon sleeve can be rotated out of the sleeper.

[0051] Specifically, as Figure 1 shown, in one embodiment, a hollow cavity 11 communicating with its interior is provided on the outer peripheral wall of the support cylinder 10. The rotary pressing mechanism 40 further includes an upper expander 44 located above the lower expander 43. Screwing the central axis nut 42 can drive the central axis main body 41 and the upper expander 44 to rotate, so that a part of the upper expander 44 can extend from the hollow cavity 11 to the outer peripheral wall and press against the inner hole wall of the nylon sleeve.

[0052] In the above setting, by rotating the rotary pressing mechanism 40, a part of its upper and lower expanders can synchronously extend from the outer peripheral wall of the support cylinder 10 and press against the inner hole wall of the nylon sleeve, so as to simultaneously apply two rotational frictional forces, namely an upper and a lower one, to the inner hole wall of the nylon sleeve, thereby ensuring that there is sufficient rotational frictional force to rotate the nylon sleeve out of the sleeper.

[0053] Specifically, as Figure 1 shown, in one embodiment, the lower expander 43 and the upper expander 44 are rectangular steel plates.

[0054] Specifically, as Figure 1 shown, in one embodiment, the central axis main body 41 is a rod-shaped structure.

[0055] Specifically, as Figure 1 shown, in one embodiment, the cross-shaped screwing structure 20 includes two clamping arms arranged in a cross shape. A through hole is provided at the cross part of the two clamping arms, and the rotary pressing mechanism 40 is inserted into the through hole.

[0056] Of course, in an alternative embodiment not shown in the drawings of the present application, the cross-shaped screwing structure 20 includes a cylinder body and four clamping arms arranged on the outer periphery of the cylinder body. The four clamping arms are spaced apart on the outer periphery of the cylinder body and can be simultaneously clamped into the cross groove.

[0057] Embodiment 2

[0058] The present utility model also provides a nylon sleeve extractor, which has the following differences from the nylon sleeve extractor in the first embodiment above:

[0059] Specifically, as Figures 2 to 4As shown, in one embodiment, the nylon sleeve extractor further includes a locking mechanism 50. The locking mechanism 50 is provided on the body nut 30, and the rotary pressing mechanism 40 is rotatably provided within the locking mechanism 50. The locking mechanism 50 is used to fix the pressing position where the rotary pressing mechanism 40 presses against the inner hole wall of the nylon sleeve.

[0060] Specifically, as Figure 5 shown, in one embodiment, the locking mechanism 50 is a ratchet mechanism, which includes a hollow self-locking box 54, a ratchet body 51, a pawl 52, and a pressing assembly 53. Among them, the hollow self-locking box 54 is provided on the body nut 30, and the rotary pressing mechanism 40 is rotatably provided within the hollow self-locking box 54; the ratchet body 51 is sleeved on the outer periphery of the rotary pressing mechanism 40 and is located within the hollow self-locking box 54; the pawl 52 is hinged within the hollow self-locking box 54 and cooperates with the ratchet body 51; the pressing assembly 53 is provided on the inner wall of the hollow self-locking box 54; the pressing assembly 53 can press the pawl 52 against the ratchet body 51 to prevent the ratchet body 51 from rotating in the first rotation direction, and the first rotation direction is the opposite direction of the rotation direction for the rotary pressing mechanism 40 to remove the nylon sleeve.

[0061] Specifically, as Figure 5 shown, in one embodiment, the pressing assembly 53 includes a spring body 531 and a cambered surface stop 532. Among them, one end of the spring body 531 is fixed within the hollow self-locking box 54; the cambered surface stop 532 is connected to the other end of the spring body 531; the spring body 531 can apply a spring force to the cambered surface stop 532 so that the cambered surface stop 532 can press the pawl 52 into the groove of the ratchet body 51 to prevent the ratchet body 51 from rotating in the first direction ( Figure 5 the counterclockwise direction in

[0062] Specifically, the ratchet locking structure (locking mechanism 50) includes a ratchet body 51 fixed on one side of the surface of the central shaft body, and a secondary shaft 55 is rotatably installed inside a hollow self-locking box 54 on one side of the ratchet body 51. The top end of the secondary shaft 55 extends outside the hollow self-locking box 54. A pawl 52 is fixed on one side of the surface of the secondary shaft. The end of the pawl 52 contacts the tooth groove part of the ratchet body 51. A pressing assembly 53 is installed on the inner wall of the hollow self-locking box on one side of the secondary shaft;

[0063] Specifically, the pressing assembly 53 includes a spring body 531 fixed on the inner wall of the hollow self-locking box 54. An arc-shaped stop 532 is installed at the bottom end of the spring body 531. The outer wall of the arc-shaped stop 532 contacts the outer wall of the secondary shaft 55. An arc-shaped concave part 551 that matches the arc-shaped stop 532 is provided on the outer wall on one side of the secondary shaft. During the process of expanding the upper and lower expanders, the central shaft body 41 will drive the ratchet body 51 to rotate back.

[0064] After the central axis body rotates to the required angle, the elastic force of the spring body 531 causes the arc-shaped stopper 532 to be inserted into the arc-shaped concave portion 551 of the auxiliary shaft 55, thereby using the pawl 52 to lock the angles of the ratchet body 51 and the central axis body 41, helping the upper and lower expanders to maintain at the corresponding expanded positions and improving the working stability of the extractor.

[0065] The following will describe in combination Figures 2 to 5 as shown, a more specific application implementation in this embodiment:

[0066] The utility model provides a nylon sleeve extractor, which includes a body nut. A fixed seat is fixed at the top of the body nut, and a hollow self-locking box is installed at the top of the fixed seat. A cross-shaped screwing structure that is mutually engaged with the cross-shaped notch of the nylon sleeve is fixed at the bottom of the body nut. A support cylinder is fixed at the central position at the bottom of the cross-shaped screwing structure. The body nut, the central axis nut, and the support cylinder are integrally made of components made of alloy steel.

[0067] Specifically, when there is a cross-shaped notch at the top of the nylon sleeve and it is intact, the extractor is placed into the nylon sleeve, and by turning the body nut with a screwing tool, the body nut drives the cross-shaped screwing structure to rotate together, and then the nylon sleeve can be easily taken out. The screwing tool can be various common tools such as a T-shaped socket wrench, an adjustable wrench, and a single-opening wrench.

[0068] Specifically, a central axis body is rotatably installed on one side inside the support cylinder. Both ends of the central axis body extend to the outside of the hollow self-locking box and the support cylinder respectively. The distance between the central axis of the central axis body and the central axis of the support cylinder is from... to... centimeters.

[0069] Specifically, a central axis nut is fixed at the top of the central axis body, and a lower expander is installed at the bottom of the central axis body. A hollow cavity is provided on one side inside the support cylinder, and an upper expander is fixed on the surface of the central axis body inside the hollow cavity. When there is no cross-shaped notch at the top of the nylon sleeve or the top cross-shaped notch is damaged, the extractor is placed into the nylon sleeve, and by turning the central axis nut, the central axis nut drives the central axis body, the upper expander, and the lower expander to rotate in sequence, so that the upper expander and the lower expander are expanded in the nylon sleeve, and the upper expander and the lower expander apply force to the inner wall of the nylon sleeve. Then, by turning the body nut, the nylon sleeve can be finally driven to rotate out together, and the nylon sleeve can be taken out from inside the sleeper.

[0070] Specifically, a ratchet locking structure for locking the rotation angle of the central axis body is provided inside the hollow self-locking box.

[0071] It should be noted that when the embodiment of the present application is in use, if there is a cross-notch at the top of the nylon sleeve and it is intact, the extractor is placed into the nylon sleeve, and by turning the body nut, the body nut drives the cross-screw structure to rotate together, and the nylon sleeve can be easily removed; if there is no cross-notch at the top of the nylon sleeve or the top cross-notch is damaged, the extractor is placed into the nylon sleeve, and by turning the central axis nut, the central axis nut drives the central axis main body, the upper expander and the lower expander to rotate in sequence, so that the upper expander and the lower expander expand in the nylon sleeve. The greater the rotation angle of the central axis nut and the central axis main body, the stronger the tightening force of the upper expander and the lower expander on the inner wall of the nylon sleeve. Subsequently, by turning the body nut, the nylon sleeve is finally driven to rotate out together. When half of the nylon sleeve is broken inside the sleeper, the extractor is placed into the nylon sleeve, and the central axis nut is turned to drive the lower expander to rotate and expand, and the half of the nylon sleeve inside the sleeper can be screwed out; after screwing out the damaged nylon sleeve, the body nut and the cross-screw structure of the extractor are used to connect with the cross-head of the nylon sleeve, and a new nylon sleeve can be installed inside the sleeper. The extractor provides multiple screwing methods, fully considering the working states under various adverse conditions, greatly improving the universality of the tool and the working efficiency of the staff.

[0072] Although the present invention has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A nylon sleeve extractor, characterized in that, The nylon sleeve is inserted into the sleeper and is threadedly connected to the sleeper. The nylon sleeve extractor includes: A support cylinder for inserting into the nylon sleeve to be removed; and A cross screwing structure provided on the support cylinder, and the cross screwing structure can be clamped in the cross groove at the end of the nylon sleeve; and A body nut provided on the cross screwing structure; and A rotary pressing mechanism rotatably provided in the body nut, the cross screwing structure and the support cylinder; Wherein, the central axis of the rotary pressing mechanism is eccentrically arranged with the central axis of the support cylinder. The nylon sleeve extractor is configured such that when the cross screwing structure is inserted into the cross groove, rotating the rotary pressing mechanism, a part of the rotary pressing mechanism can extend out of the outer peripheral wall of the support cylinder and press against the inner hole wall of the nylon sleeve, and the nylon sleeve can be removed from the sleeper by rotating the rotary pressing mechanism, or the nylon sleeve can be rotated and removed from the sleeper by rotating the body nut.

2. The nylon sleeve extractor according to claim 1, wherein, The support cylinder, the cross screwing structure and the body nut are coaxially arranged.

3. The nylon sleeve extractor according to claim 2, wherein The rotary pressing mechanism includes: A central axis main body passing through the support cylinder, the cross screwing structure and the body nut; and A central axis nut provided at the top end of the central axis main body and located above the body nut; and A lower expander provided at the bottom end of the central axis main body and located below the support cylinder; Wherein, screwing the central axis nut can drive the central axis main body and the lower expander to rotate, so that a part of the lower expander can extend out of the outer peripheral wall of the support cylinder and press against the inner hole wall of the nylon sleeve.

4. The nylon sleeve extractor according to claim 3, wherein A hollow cavity is provided on the outer peripheral wall of the support cylinder and is communicated with its interior. The rotary pressing mechanism further includes an upper expander located above the lower expander. Screwing the central axis nut can drive the central axis main body and the upper expander to rotate, so that a part of the upper expander can extend out of the outer peripheral wall from the hollow cavity and press against the inner hole wall of the nylon sleeve.

5. The nylon sleeve extractor according to claim 4, wherein, The lower expander and the upper expander are rectangular steel plates, and the central axis main body is a rod-shaped structure.

6. The nylon sleeve extractor according to any one of claims 1 to 5, characterized in that, The cross screwing structure includes a cylinder body and four clamping arms provided on the outer periphery of the cylinder body. The four clamping arms are spaced apart on the outer periphery of the cylinder body and can be simultaneously inserted into the cross groove.

7. The nylon sleeve extractor according to any one of claims 1 to 5, characterized in that, The cross screwing structure includes two clamping arms arranged in a cross shape, and through holes are provided at the cross part of the two clamping arms. The rotary pressing mechanism passes through the through holes.

8. The nylon sleeve extractor according to any one of claims 1 to 5, characterized in that, The nylon sleeve extractor further includes a locking mechanism provided on the body nut. The rotary pressing mechanism is rotatably provided in the locking mechanism, and the locking mechanism is used to fix the pressing position where the rotary pressing mechanism presses against the inner hole wall of the nylon sleeve.

9. The nylon sleeve extractor according to claim 8, wherein The locking mechanism is a ratchet mechanism, which includes: A hollow self-locking box provided on the body nut, and the rotary pressing mechanism is rotatably provided in the hollow self-locking box; and A ratchet main body sleeved on the outer periphery of the rotary pressing mechanism and located in the hollow self-locking box; and A pawl, which is hinged inside the hollow self-locking box and cooperates with the ratchet main body; A pressing component, which is arranged on the inner wall of the hollow self-locking box; Wherein, the pressing component can press the pawl on the ratchet main body to prevent the ratchet main body from rotating in the first rotation direction, and the first rotation direction is the reverse direction of the rotation direction of the rotary pressing mechanism for taking out the nylon sleeve.

10. The nylon sleeve extractor according to claim 9, wherein, The pressing component includes: A spring main body, one end of which is fixed inside the hollow self-locking box; and A cambered surface stop head, which is connected to the other end of the spring main body; Wherein, the spring main body can apply a spring force to the cambered surface stop head, so that the cambered surface stop head can press the pawl in the groove of the ratchet main body to prevent the ratchet main body from rotating in the first direction.

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