Fitting device

Abstract

The application relates to a fitting device, comprising an operation table, a feeding mechanism and a straightening mechanism. The feeding mechanism is arranged on the operation table and is configured to fix a first pipe and drive the first pipe to feed in a first direction. The straightening mechanism is arranged on the operation table and is configured to fix a second pipe by means of a straight pipe part and drive the second pipe to rotate around a first axis perpendicular to the first direction. The straightening mechanism has a first position in rotation, in which the end of a bent part is aligned with the first pipe, and a second position in which the central axis of the straight pipe part is collinear with the central axis of the first pipe. The fitting device has low operation difficulty and high assembly efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe fitting assembly, in particular to a sleeving device. BACKGROUND

[0002] The intramedullary nail belongs to the orthopedic internal fixation device in medical devices. In the related technology, a specially-made drilling device is inserted into the bone marrow, the drilling device includes a nickel-titanium tube and a straight tube sleeved outside the nickel-titanium tube, the nickel-titanium tube has shape memory, and after the end of the nickel-titanium tube is pushed out of the straight tube, it is restored to a hook shape to play an auxiliary positioning role, thereby facilitating the drilling of the drill along the inner wall of the extended nickel-titanium tube from the bone marrow to the outside of the bone for the implantation of the intramedullary nail. At present, there is no device for assembling the nickel-titanium tube and the straight tube, and only manual operation with the help of clamps and other conventional tools, resulting in high operation difficulty and low assembly efficiency. SUMMARY

[0003] Therefore, a sleeving device is provided to reduce the operation difficulty and improve the assembly efficiency.

[0004] The embodiment of the present application provides a sleeving device for sleeving a first pipe on a second pipe having a bending part and a straight pipe part connected with each other, the sleeving device comprising:

[0005] an operation table;

[0006] a feeding mechanism arranged on the operation table, the feeding mechanism being configured to fix the first pipe and drive the first pipe to feed in a first direction; and

[0007] a straightening mechanism arranged on the operation table, the straightening mechanism being configured to fix the second pipe by means of the straight pipe part and drive the second pipe to rotate around a first axis perpendicular to the first direction, the straightening mechanism having a first position in rotation to align the end of the bending part with the first pipe and a second position to make the central axis of the straight pipe part and the central axis of the first pipe collinear.

[0008] In one of the embodiments, the feeding mechanism comprises a sliding rail and a sliding block.

[0009] The sliding rail is fixed to the operation table, and the sliding block is in sliding cooperation with the sliding rail in the first direction.

[0010] In one of the embodiments, a sliding groove extending in the first direction is arranged on the sliding rail.

[0011] The sliding block is configured as a linear sliding table, and the linear sliding table is in sliding cooperation with the sliding groove in the first direction.

[0012] In one embodiment, the feeding mechanism further includes a first clamping member disposed on the sliding member; the first clamping member is used to clamp and fix the first tube to the sliding member; and / or

[0013] The feeding mechanism further includes a driving member; the driving member is disposed on the operating table, and the driving member is configured to drive the slider to slide along the first direction.

[0014] In one embodiment, when the feed mechanism includes a first clamping member, the first clamping member is configured as a vertical clamp; and / or

[0015] When the feeding mechanism includes a driving member, the driving member includes a support member and a screw; the support member is fixed to the operating table and located on the side of the sliding member away from the straightening mechanism along the first direction; the screw is threadedly connected to the support member, and when the screw rotates, it can approach and abut against the sliding member along the first direction.

[0016] In one embodiment, the straightening mechanism includes a rotating member rotatably connected to the operating table about the first axis.

[0017] In one embodiment, the straightening mechanism further includes a locking member passing through the rotating member, and the operating table is provided with a locking hole adapted to the locking member; the straightening mechanism is located in the second position, and the locking member can pass through the locking hole; and / or

[0018] The straightening mechanism further includes a second clamping member disposed on the rotating member; the second clamping member is used to clamp and fix the straight pipe portion of the second pipe to the rotating member.

[0019] In one embodiment, when the straightening mechanism includes the locking member, the locking member is configured as a reset-type rotary plunger; and / or

[0020] When the straightening mechanism includes the second clamping member, the second clamping member is configured as a pressure plate.

[0021] In one embodiment, when the straightening mechanism includes the second clamping member, there are multiple second clamping members, and all the second clamping members are arranged in a straight line on the rotating member.

[0022] In one embodiment, the straightening mechanism further includes a sleeve disposed on the rotating member;

[0023] The sleeve is constructed as a straight extension and is used to be fitted onto one end of the straight section near the bend.

[0024] The aforementioned fitting device includes at least an operating table, a feeding mechanism, and a straightening mechanism. The fitting device is used to fit a first pipe fitting onto a second pipe fitting having interconnected bent and straight sections. In use, the first pipe fitting is fixed to the feeding mechanism, and the second pipe fitting is fixed to the straightening mechanism via its straight section. The straightening mechanism is rotated to a first position to align the end of the bent section with the first pipe fitting. The feeding mechanism is then operated to feed the first pipe fitting a short distance along a first direction, allowing the end of the bent section to pass through the first pipe fitting. The straightening mechanism is rotated to a second position to align the central axis of the straight section with the central axis of the first pipe fitting to straighten the bent section. The feeding mechanism is then operated to continue feeding the first pipe fitting along the first direction, allowing the bent section and part of the straight section to pass through the first pipe fitting, thus completing the assembly. The aforementioned fitting device is easy to operate and has high assembly efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the fitting device in one embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the straightening mechanism in the first position of the fitting device;

[0027] Figure 3 This is a schematic diagram of the straightening mechanism in the second position of the fitting device.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Fitting device;

[0030] 110. Control panel; 111. Locking hole;

[0031] 120. Feeding mechanism; 121. Slide rail; 1211. Slide groove; 122. Sliding component; 123. First clamping component; 124. Driving component; 1241. Support component; 1242. Screw; 1243. Grip component; 130. Straightening mechanism; 131. Rotating component; 132. Locking component; 133. Second clamping component; 134. Sleeve component;

[0032] 10. First pipe fitting; 11. Pipe hole;

[0033] 20. Second fitting; 21. Bend; 22. Straight section. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0035] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0040] Figure 1 A schematic diagram of the fitting device in one embodiment of this application is shown; Figure 2 A schematic diagram of the straightening mechanism in the first position of the fitting device is shown; Figure 3 A schematic diagram of the straightening mechanism in the second position of the fitting device is shown.

[0041] In some embodiments, see Figures 1 to 3 This application provides a fitting device 100 for fitting a first pipe fitting 10 onto a second pipe fitting 20 having a bend 21 and a straight pipe section 22 connected to each other. The fitting device 100 includes an operating table 110, a feeding mechanism 120, and a straightening mechanism 130. The feeding mechanism 120 is disposed on the operating table 110 and is configured to fix the first pipe fitting 10 and drive the first pipe fitting 10 to feed along a first direction (direction a in the figure). The straightening mechanism 130 is disposed on the operating table 110. The straightening mechanism 130 is configured to fix the second pipe fitting 20 by means of the straight pipe section 22 and drive the second pipe fitting 20 to rotate about a first axis O perpendicular to the first direction. During rotation, the straightening mechanism 130 has a first position in which the end of the bend 21 is aligned with the first pipe fitting 10, and a second position in which the central axis N of the straight pipe section 22 is collinear with the central axis M of the first pipe fitting 10.

[0042] The first tube 10 is a straight extension, and the second tube 20 has shape memory properties. In the drilling instrument used for drilling intramedullary nails, the straight tube corresponds to the first tube 10, and the nickel-titanium tube corresponds to the second tube 20. Nickel-titanium alloy is a shape memory alloy, a special alloy that can automatically recover its original shape after plastic deformation at a specific temperature, exhibiting excellent plasticity. In this drilling instrument, the end of the nickel-titanium tube is hook-shaped at room temperature and without constraint. The straight tube constrains the end of the nickel-titanium tube. When the straight tube is fitted over the end of the nickel-titanium tube, the drilling instrument as a whole is in a straight extension shape, facilitating insertion into the bone marrow during surgery. During use, the end of the nickel-titanium tube is pushed out of the straight tube and returns to its hook shape, thus providing auxiliary positioning and facilitating drilling from within the bone marrow to the outside of the bone for intramedullary nail implantation.

[0043] The operating table 110 is used to support other components on the fitting device 100. Optionally, the operating table 110 can be constructed as a plate or a box. When the first pipe 10 is fixed to the feeding mechanism 120 and the second pipe 20 is fixed to the straightening mechanism 130, the central axis M of the first pipe 10 and the central axis N of the straight pipe section 22 are both perpendicular to the first axis O. When the end of the bent section 21 is aligned with the first pipe 10, see [reference needed]. Figure 2 By feeding the first pipe fitting 10 along the first direction via the feeding mechanism 120, at least part of the end of the bent portion 21 can be inserted into the through hole 11 of the first pipe fitting 10, thereby allowing the wall of the through hole 11 to fix the end of the bent portion 21 during the subsequent straightening process of the straightening mechanism 130. When the central axis N of the straight pipe portion 22 is collinear with the central axis M of the first pipe fitting 10, see [reference needed]. Figure 3 The feeding mechanism 120 drives the first pipe 10 to continue feeding in the first direction, so that the bent part 21 and part of the straight part 22 can be inserted into the through hole 11 of the first pipe 10. The hole wall of the through hole 11 constrains the bent part 21, so that the assembly formed by the first pipe 10 and the second pipe 20 is in a straight extension shape, which is convenient for use.

[0044] Therefore, in use, the above-mentioned fitting device 100 fixes the first pipe fitting 10 to the feeding mechanism 120 and the second pipe fitting 20 to the straightening mechanism 130 via the straight pipe section 22. The straightening mechanism 130 is rotated to the first position, aligning the end of the bent section 21 with the first pipe fitting 10. The feeding mechanism 120 is then operated to feed the first pipe fitting 10 a short distance along the first direction, allowing the end of the bent section 21 to pass through the first pipe fitting 10. The straightening mechanism 130 is then rotated to the second position, making the central axis N of the straight pipe section 22 collinear with the central axis M of the first pipe fitting 10 to straighten the bent section 21. The feeding mechanism 120 is then operated to continue feeding the first pipe fitting 10 along the first direction, allowing the bent section 21 and part of the straight pipe section 22 to pass through the first pipe fitting 10, thus completing the assembly. The above-mentioned fitting device 100 is easy to operate and has high assembly efficiency.

[0045] It should be noted that the purpose of the fitting device 100 is not limited to the assembly of the drilling instruments described above. In other embodiments, the fitting device 100 can also be used to assemble other devices with structures such as the first pipe fitting 10 and the second pipe fitting 20. This application does not limit this.

[0046] In some embodiments, see Figure 2 and Figure 3When the first pipe fitting 10 is fixed to the feeding mechanism 120 and the second pipe fitting 20 is fixed to the straightening mechanism 130, the central axis M of the first pipe fitting 10 and the first axis O are located in the first plane, and the central axis N of the second pipe fitting 20 and the first axis O are located in the second plane. When the straightening mechanism 130 rotates to the second position, the first plane and the second plane coincide. In this way, it can be ensured that the straightening mechanism 130 has a second position during rotation in which the central axis N of the straight pipe section 22 is collinear with the central axis M of the first pipe fitting 10.

[0047] Furthermore, the feeding mechanism 120 is provided with a first positioning structure to ensure that the central axis M of the first pipe fitting 10 is coplanar with the first axis O, and the straightening mechanism 130 is provided with a second positioning structure to ensure that the central axis N of the second pipe fitting 20 is coplanar with the first axis O, which facilitates the loading of the first pipe fitting 10 and the second pipe fitting 20. Optionally, the first positioning structure and the second positioning structure can be constructed as positioning grooves.

[0048] In some embodiments, see continue to see Figure 1 The feeding mechanism 120 includes a slide rail 121 and a sliding member 122. The slide rail 121 is fixed to the operating table 110, and the sliding member 122 is slidably engaged with the slide rail 121 along a first direction. Thus, when the first pipe 10 is fixed on the sliding member 122, the sliding member 122 can slide relative to the operating table 110 along the first direction under the action of the slide rail 121, thereby realizing the feeding of the first pipe 10 along the first direction.

[0049] Specifically Figure 1 In the illustrated embodiment, the slide rail 121 is provided with a groove 1211 extending along a first direction, and the slider 122 is configured as a linear slide, with the linear slide and the groove 1211 slidingly engaged along the first direction. Furthermore, two slide rails 121 are provided, located on opposite sides of the slider 122, which helps ensure smooth movement and uniform force distribution of the slider 122 during sliding.

[0050] In some embodiments, the feeding mechanism 120 further includes a first clamping member 123 disposed on the sliding member 122, the first clamping member 123 being used to clamp and fix the first pipe fitting 10 onto the sliding member 122. Thus, without machining a positioning structure on the first pipe fitting 10, the first pipe fitting 10 can be fixed on the sliding member 122, allowing the sliding member 122 to drive the first pipe fitting 10 to feed along a first direction. Optionally, the first clamping member 123 can be a vertical clamp, where the handle and pressure lever are vertically aligned in the clamping state. Two types of pressure heads are available: rubber pressure heads and bolt pressure heads, with various pressure lever styles to choose from. The clamping force range of the vertical clamp is 30-550 kg, which can meet the clamping force requirements of first pipe fittings 10 of different specifications.

[0051] In some embodiments, the feeding mechanism 120 further includes a drive member 124. The drive member 124 is disposed on the operating table 110 and is configured to drive the slider 122 to slide along a first direction. Thus, by operating the drive member 124 to apply a thrust along the first direction to the slider 122, the slider 122 can overcome the friction between the through hole 11 and the bend 21 and drive the first tube 10 to be fed along the first direction.

[0052] Specifically Figure 1 In the illustrated embodiment, the drive member 124 includes a support member 1241 and a screw 1242. The support member 1241 is fixed to the operating table 110 and located on the side of the sliding member 122 away from the straightening mechanism 130 along the first direction. The screw 1242 is threadedly connected to the support member 1241. When the screw 1242 rotates, it can approach and abut against the sliding member 122 along the first direction. Specifically, the central axis of the screw 1242 is parallel to the first direction. Thus, the operator can rotate the screw 1242 to push the sliding member 122 to slide along the first direction, thereby driving the first pipe fitting 10 to feed along the first direction. The screw 1242 converts rotational motion into linear motion, which helps to accurately control the feed amount of the first pipe fitting 10, thereby ensuring fitting accuracy.

[0053] Furthermore, the drive member 124 also includes a gripping member 1243 fixed to the end of the screw 1242 away from the sliding member 122. Thus, the operator can apply torque to the screw 1242 through the gripping member 1243, facilitating operation. Optionally, the gripping member 1243 may have a textured surface for easy hand gripping and be covered with an anti-slip material, thereby improving grip stability and comfort. During manufacturing, the screw 1242 and the gripping member 1243 may be standard handle components.

[0054] In some embodiments, see continue to see Figure 1 The straightening mechanism 130 includes a rotating member 131 rotatably connected to the operating table 110 about a first axis O. Thus, when the second pipe 20 is fixed to the rotating member 131, the rotating member 131 can drive the second pipe 20 to rotate relative to the operating table 110 about the first axis O, thereby aligning the end of the bent portion 21 with the first pipe 10 and straightening the bent portion 21. It should be noted that when the straight pipe portion 22 of the second pipe 20 is long, the rotating member 131 should also be of sufficient length to effectively fix the entire straight pipe portion 22. Additionally, the operator can use the lever principle to apply torque to the rotating member 131 from the end away from the first axis O, achieving a labor-saving effect. Optionally, the rotating member 131 can be rotatably connected to the operating table 110 via an internally installed bearing.

[0055] In some embodiments, the straightening mechanism 130 further includes a locking member 132 passing through the rotating member 131. The operating table 110 is provided with a locking hole 111 adapted to the locking member 132. When the straightening mechanism 130 is in the second position, the locking member 132 can pass through the locking hole 111. Thus, when the straightening mechanism 130 is rotated to the second position, the operator can fix the rotating member 131 relative to the operating table 110 by inserting the locking member 132 into the locking hole 111, thereby ensuring that the second tube 20 remains fixed throughout the entire process of the feeding mechanism 120 feeding along the first direction and the first tube 10 being sleeved outside the second tube 20. Optionally, the locking member 132 may be a reset-type rotary plunger.

[0056] In some embodiments, the straightening mechanism 130 further includes a second clamping member 133 disposed on the rotating member 131, the second clamping member 133 being used to clamp and fix the straight pipe portion 22 of the second pipe 20 to the rotating member 131. Thus, the second pipe 20 can be fixed on the rotating member 131 without the need for machining a positioning structure on the second pipe 20, allowing the rotating member 131 to drive the second pipe 20 to rotate around the first axis. Optionally, the second clamping member 133 may be a pressure plate.

[0057] Specifically Figure 1 In the illustrated embodiment, multiple second clamping members 133 are provided, all arranged in a straight line on the rotating member 131. Thus, when the straight pipe portion 22 of the second pipe fitting 20 is long, the multiple straight-arranged second clamping members 133 can effectively fix the entire straight pipe portion 22. Optionally, the number of second clamping members 133 can be set to three or more.

[0058] In some embodiments, the straightening mechanism 130 further includes a sleeve 134 disposed on the rotating member 131. The sleeve 134 is configured as a straight extension and is used to sleeve the end of the straight tube portion 22 near the bend portion 21. Thus, when the straightening mechanism 130 drives the second tube portion 20 to rotate to straighten the bend portion 21, the end of the straight tube portion 22 near the bend portion 21 can maintain a straight shape under the constraint of the sleeve 134, thereby ensuring the stability of the straightening process of the bend portion 21 and improving the straightening effect. It can be understood that after the first tube portion 10 and the second tube portion 20 are assembled, in addition to unloading the clamping force of the first clamping member 123 on the first tube portion 10 and the clamping force of the second clamping member 133 on the second tube portion 20, it is also necessary to pull the straight tube portion 22 of the second tube portion 20 out of the sleeve 134 before the assembly formed by the first tube portion 10 and the second tube portion 20 can be removed from the fitting device 100.

[0059] In summary, this application provides a fitting device 100, including an operating table 110, a feeding mechanism 120, and a straightening mechanism 130. In use, a first pipe fitting 10 is fixed to the feeding mechanism 120, and a second pipe fitting 20 is fixed to the straightening mechanism 130 via a straight section 22. The straightening mechanism 130 is rotated to a first position, aligning the end of the bent section 21 with the first pipe fitting 10. The feeding mechanism 120 is then operated to feed the first pipe fitting 10 a short distance along a first direction, allowing the end of the bent section 21 to pass through the first pipe fitting 10. The straightening mechanism 130 is rotated to a second position, making the central axis N of the straight section 22 collinear with the central axis M of the first pipe fitting 10 to straighten the bent section 21. The feeding mechanism 120 is then operated to continue feeding the first pipe fitting 10 along the first direction, allowing the bent section 21 and part of the straight section 22 to pass through the first pipe fitting 10, thus completing the assembly. The above-mentioned fitting device 100 is easy to operate and has high assembly efficiency.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A fitting device for fitting a first pipe fitting onto a second pipe fitting having interconnected bends and straight sections, characterized in that, The fitting device includes: Control panel; A feeding mechanism is disposed on the operating table; the feeding mechanism is configured to fix the first pipe fitting and drive the first pipe fitting to feed along a first direction; and A straightening mechanism is provided on the operating table; the straightening mechanism is configured to fix the second pipe fitting by means of the straight pipe section and drive the second pipe fitting to rotate around a first axis perpendicular to the first direction; the straightening mechanism has a first position in which the end of the bent part is aligned with the first pipe fitting, and a second position in which the central axis of the straight pipe section is collinear with the central axis of the first pipe fitting.

2. The fitting device according to claim 1, characterized in that, The feeding mechanism includes a slide rail and a sliding component; The slide rail is fixed to the operating table, and the sliding member and the slide rail slide together along the first direction.

3. The fitting device according to claim 2, characterized in that, The slide rail component is provided with a slide groove extending along the first direction; The slider is configured as a linear slide, and the linear slide and the slide groove slide in a sliding engagement along the first direction.

4. The fitting device according to claim 2, characterized in that, The feeding mechanism further includes a first clamping member disposed on the sliding member; the first clamping member is used to clamp and fix the first tube to the sliding member; and / or The feeding mechanism further includes a driving member; the driving member is disposed on the operating table, and the driving member is configured to drive the slider to slide along the first direction.

5. The fitting device according to claim 4, characterized in that, When the feeding mechanism includes a first clamping member, the first clamping member is configured as a vertical clamp; and / or When the feeding mechanism includes a driving member, the driving member includes a support member and a screw; the support member is fixed to the operating table and located on the side of the sliding member away from the straightening mechanism along the first direction; the screw is threadedly connected to the support member, and when the screw rotates, it can approach and abut against the sliding member along the first direction.

6. The fitting device according to any one of claims 1-5, characterized in that, The straightening mechanism includes a rotating component rotatably connected to the operating table about the first axis.

7. The fitting device according to claim 6, characterized in that, The straightening mechanism further includes a locking member that passes through the rotating member, and the operating table is provided with a locking hole that matches the locking member; the straightening mechanism is located in the second position, and the locking member can pass through the locking hole; and / or The straightening mechanism further includes a second clamping member disposed on the rotating member; the second clamping member is used to clamp and fix the straight pipe portion of the second pipe to the rotating member.

8. The fitting device according to claim 7, characterized in that, When the straightening mechanism includes the locking element, the locking element is configured as a reset-type rotary plunger; and / or When the straightening mechanism includes the second clamping member, the second clamping member is configured as a pressure plate.

9. The fitting device according to claim 7, characterized in that, When the straightening mechanism includes the second clamping member, there are multiple second clamping members, and all the second clamping members are arranged in a straight line on the rotating member.

10. The fitting device according to claim 6, characterized in that, The straightening mechanism also includes a sleeve component disposed on the rotating component; The sleeve is constructed as a straight extension and is used to be fitted onto one end of the straight section near the bend.

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