Attitude-adjustment-free rapid butt joint system for weakly rigid cylindrical product

Abstract

The invention relates to a posture-adjustment-free quick butt-joint system for weakly rigid cylindrical products, which is designed on the basis of a weakly rigid assembly butt-joint theory, specifically comprises a butt-joint platform (2) and a linear guide rail (5) mounted on the butt-joint platform (2), and is characterized in that two groups of linear guide rail slide blocks (3) are mounted on the linear guide rail (5); a modularized skid system (1) is mounted on each group of linear guide rail sliding blocks (3); the modularized skid system (1) comprises a rack (8), an upper embracing ring foundation plate (6) and a lower embracing ring foundation plate (7), the lower embracing ring foundation plate (7) is connected and installed in the rack (8), the upper embracing ring foundation plate (6) is connected to the upper face of the lower embracing ring foundation plate (7), and the upper embracing ring foundation plate (6) and the lower embracing ring foundation plate (7) form a complete embracing ring when closed. According to the invention, posture-adjustment-free butt joint operation of the weak-rigidity cylindrical product when the weak-rigidity cylindrical product exceeds an assembly gap is realized.

Description

Technical Field

[0001] The invention relates to the field of assembly and is a non-adjustment quick docking system for weak-rigidity cylindrical products. Background Art

[0002] In my country's aerospace industry, there are a large number of cylindrical product docking and assembly tasks. The traditional docking method is designed based on the rigid docking theory, which assumes that the parts involved in the assembly have sufficient rigidity to resist the external forces applied during the assembly process without significant deformation. Therefore, it is necessary to strictly limit the product manufacturing tolerance and assembly clearance, and put forward high requirements for the relative posture control of the product. Previous solutions mostly used multi-degree-of-freedom adjustment and posture detection devices or completely manual assembly. Unlike rigid products, weak rigid products, such as thin-walled parts or flexible structures, will deform when subjected to radial forces during docking, which can compensate for manufacturing errors and assembly posture deviations to a certain extent, and improve assembly adaptability and tolerance. Summary of the invention

[0003] The purpose of the present invention is to design a non-adjustment quick docking system and method for weak-rigidity cylindrical products, which is presented in a non-adjustment docking system and only requires one person to complete all docking tasks.

[0004] A non-attitude adjustment quick docking system for weak rigid cylindrical products is designed based on the weak rigid assembly docking theory, specifically comprising a docking platform 2, on which a linear guide rail 5 is installed, characterized in that two groups of linear guide rail sliders 3 are installed on the linear guide rail 5, and a modular slide system 1 is installed on each group of linear guide rail sliders 3; the modular slide system 1 comprises a frame 8, an upper embrace ring base plate 6 and a lower embrace ring base plate 7, the lower embrace ring base plate 7 is connected and installed in the frame 8, the upper embrace ring base plate 6 is connected to the lower embrace ring base plate 7, and the upper embrace ring base plate 6 and the lower embrace ring base plate 7 form a complete embrace ring when closed;

[0005] The lower holding ring base plate 7 includes a lower base plate 71, a guide rail mounting groove 17, an arc guide rail 16 and a support assembly 27. The guide rail mounting groove 17 is fixedly mounted on the side of the circular wall of the lower base plate 71, and the arc guide rail 16 is fixedly mounted on the guide rail mounting groove 17. Two support assemblies 27 are mounted on the functional component mounting holes 20 on the opposite sides of the arc guide rail 16 to provide support for the product 4.

[0006] The upper holding ring base plate 6 includes an upper base plate 61, a guide rail mounting groove 17, an arc guide rail 16 and a support assembly 61. The guide rail mounting groove 17 is also fixedly mounted on the side of the circular wall of the upper base plate 61, and the arc guide rail 16 is also fixedly mounted on the guide rail mounting groove 17. The clamping assembly 26 is installed on the opposite side of the arc guide rail 16 through the functional component mounting hole 20 for fixing the product 4;

[0007] The inner wall of the frame 8 is fixedly connected to one side of the arc guide slider 10, and the arc guide slider 10 is installed on the positioning surface of the frame 8 through a wedge block 11 and a fixing bolt; a slideway is provided on the other side of the arc guide slider 10, and the arc guide 16 is embedded in the slideway of the arc guide slider 10; the lower surface of the frame 8 is installed on the frame base 9 through bolts, and the frame base 9 is installed on the linear guide slider 3 through bolts 14, and is positioned by a positioning pin 15 and a top screw 28;

[0008] During operation, two cylindrical products 4 to be docked are placed one by one into a modular slide system 1 support assembly 27, the upper and lower ring base plates 67 are closed, the pressing assembly 26 and the support assembly 27 fix the products 4, and then the two modular slide systems 1 are brought close to bring the two cylindrical products 4 to be docked close to each other, and then a modular slide system 1 is rotated to align one cylindrical product 4 with the position where it is connected to another cylindrical product 4; then the cylindrical products 4 to be docked are further brought close until the docking is successful.

[0009] The support assembly 27 is further provided with a clamping assembly 26 , and the clamping assembly 26 is further provided with a locking knob 31 .

[0010] A handle 24 and a lifting ring 25 are also provided on the side of the circular arc guide rail 16 away from the circular arc guide rail slider 10 . The handle 24 is used to rotate the circular arc guide rail 16 .

[0011] A self-locking rivet 18 is provided at the connection between the upper base plate 61 and the lower base plate 71; a combined connecting head 21 is provided at the end of the connection of the upper base plate 61, and a combined connecting groove 22 is provided at the end of the connection of the lower base plate 71, and the combined connecting head 21 and the combined connecting groove 22 cooperate with each other; a buffer block 29 is also provided at the end of the upper base plate 61 on the side of the combined connecting head 21, and an oil-free bushing 23 is also provided at the end of the lower base plate 71 on the side of the combined connecting groove 22.

[0012] The stop pin 12 and the speed-limiting friction block 13 are radially arranged on the same side of the frame 8, and the friction block adjustment bolt 30 fixes the speed-limiting friction block 13 to the frame 8; the stop pin 12 plays the role of limiting the rolling angle of the holding ring.

[0013] The present invention is aimed at weak-rigidity cylindrical products, based on weak-rigidity assembly docking theory, and designs and manufactures a non-attitude adjustment docking system to achieve non-attitude adjustment docking operations of weak-rigidity cylindrical products when they exceed assembly clearances. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 , is a schematic diagram of the working structure of the present invention;

[0015] Figure 2 , is a schematic structural diagram of a modular skid system 1 of the present invention;

[0016] Figure 3 , is a schematic diagram of a frame 8 of the present invention;

[0017] Figure 4 , is a schematic structural diagram of an upper holding ring base plate 6 and a lower holding ring base plate 7 of the present invention;

[0018] (a) A schematic diagram of the front structure of the upper and lower ring base plates 6 and 7 of the present invention

[0019] (b) is a schematic diagram of the back structure of (a).

[0020] Description of the symbols in the accompanying drawings:

[0021] 1 is a modular slide system, 2 is a workbench, 3 is a linear guide slider, 4 is a product, 5 is a linear guide, 6 is an upper holding ring base plate, 7 is a lower holding ring base plate, 8 is a frame, 9 is a frame base, 10 is an arc guide slider, 11 is a wedge block, 12 is a stop pin, 13 is a friction block, 14 is a mounting bolt, 15 is a positioning pin, 16 is an arc guide, 17 is an arc guide mounting groove, 18 is a self-locking rivet, 19 is a limit hole, 20 is a functional component mounting hole, 21 is a combined connector, 22 is a combined connecting groove, 23 is an oil-free bushing, 24 is a handle, 25 is a lifting ring, 26 is a clamping assembly, 27 is a support assembly, 28 is a top screw, 29 is a buffer block, 30 is a friction block adjustment bolt, and 31 is a locking knob 6 is an upper holding ring base plate and 7 is a lower holding ring base plate. DETAILED DESCRIPTION

[0022] The purpose of the present invention is to achieve a quick docking method without posture adjustment for weakly rigid cylindrical products, and the main structure can be divided into a docking platform and a modular slide system.

[0023] The docking platform is composed of a workbench and a linear guide module. It is further explained that the linear guide is installed on the workbench plane, and the workbench lateral positioning groove and wedge block are used to install and debug the guide to ensure that the straightness of the guide meets the requirements. In addition, the guide and the platform base are fixed with fastening bolts to ensure the flatness of the guide. The sled system is installed on the linear guide slider, thereby providing the product with high-precision and stable X-direction movement capability.

[0024] The modular sled system (abbreviated as the holding ring) is composed of a frame, a base plate, an arc guide rail, and various functional components. Further description:

[0025] The frame includes a bottom positioning pin hole, a radial stop pin, a speed-limiting friction block, an arc guide-slider mounting hole, and an arc guide slider. The frame is the guarantee of the Y-direction and yaw accuracy of the holding ring. Therefore, a tapered hole is arranged at the corresponding position connected to the linear guide slider, which is used as a positioning pin hole to complete the basic positioning function of the holding ring structure. In the sled system designed by the present invention, a standard product-arc guide is used to provide 360° angular automation for the cylindrical product. Among them, the arc guide is used as a mover, the arc guide-slider is used as a stator, and is connected to the frame through the arc guide-slider mounting hole. When the arc guide-slider is installed, the outer curved surface of the slider contour and the left plane are used as positioning surfaces to provide initial positioning for the slider. A wedge block is installed on the right side of the slider and is tightened with a set screw on the radial inner side to play a fixing and clamping role. In addition, a stop pin and a speed-limiting friction block are arranged radially on the same side of the frame, and are connected to the frame through threads, which play the role of angular limit and speed limit during the rolling motion of the holding ring.

[0026] The base plate is divided into an upper ring base plate and a lower ring base plate, both of which are semicircular in shape. The outer diameter is used as a limit and speed limit surface, the inner diameter is used as the installation and positioning surface of each functional component, and the side provides a positioning reference for the installation of the arc guide rail. The two are connected by an oil-free bushing to ensure tight connection and smooth movement. Among them, the upper ring base plate consists of a main structure, an arc guide rail installation groove, a threaded connection hole, a limit pin hole, a self-locking rivet installation hole, a self-locking rivet, a positioning pin hole, a combined connector, and a buffer block. The main structure is made of aluminum alloy to minimize weight. An arc guide rail installation groove is opened on one side of the main structure, and the outer diameter and bottom surface of the groove are used as the arc guide rail installation and positioning surface. The inner diameter of the groove is connected to the inner diameter of the main structure, and threaded holes are set at 30° for radial clamping of the arc guide rail. On the same side of the installation groove, threaded holes are also set at 30° intervals on the side wall of the main structure for axial clamping of the arc guide rail. On the opposite side of the installation groove, threaded holes of the same specification are arranged in a staggered manner with the guide rail installation hole for the installation of various functional components. The main structure's outer diameter is arranged with positioning pin holes at 60° intervals, which cooperate with the frame's radial positioning pins for the angular positioning of the ring rotation. One end of the main structure is processed to obtain a combined connector, which cooperates with the combined connection groove of the lower ring base plate, and is provided with a radial tight connection and smooth rotation by an oil-free bushing and a clamp. At the same time, a rubber buffer block is installed on the extension of the connector to avoid hard contact between the two structures when the upper and lower rings are opened and closed. The other end of the main structure is arranged with a self-locking rivet installation hole, and a self-locking rivet is installed to provide a closed self-locking function for the ring. Elliptical pin holes are processed on both end faces of the main structure, which cooperate with the cylindrical pins of the lower ring base plate to provide axis positioning accuracy for the upper and lower ring connections.

[0027] The lower ring base plate consists of the main structure, arc guide rail mounting groove, threaded connection hole, limit pin hole, self-locking rivet connection hole, positioning pin mounting hole, cylindrical positioning pin, and combined connection groove. Positioning pin mounting holes are opened at both ends of the main structure, and cylindrical positioning pins are installed. A combined connection groove is machined at one end of the main structure, and the position corresponds to the connector. The main structure, threaded hole, limit pin hole, mounting groove position, and installation positioning method are the same as those of the upper ring base plate, and the main functions have been introduced above and will not be repeated.

[0028] The arc guide rail is composed of an arc guide rail and an arc guide rail-slider, which provides high-precision and smooth rolling motion for the holding ring. The present invention adopts two sets of arc guide rails-sliders, both of which are fixedly installed on the frame as stators in the moving parts of the arc guide rails. On the other hand, the present invention adopts two sections of 180° arc guides, which are respectively installed on the upper and lower holding ring base plates, and cooperate with the arc guide rail-slider as the mover of the moving part. When in use, the mover-arc guide rail drives the holding ring base plate, various functional components, and the cylindrical product compartment section clamped by the holding ring to rotate along the axis.

[0029] The functional components, including clamping components, supporting components, self-locking components, etc., are all installed with the upper and lower base plates of the ring through the threaded holes of the base plate. The functional components involved in the present invention include clamping components and supporting components. At the same time, the outer contour of the functional component is used as a positioning reference, which cooperates with the positioning surface of the base plate, and the outer circle roundness and dimensional tolerance need to be controlled. The rapid positioning function of the functional component can make the product posture reach the preset accuracy without repeated calibration, and has good interchangeability. It can realize the clamping and docking tasks of multiple models and varieties of weak rigid cylindrical products by equipping functional components of different sizes and types.

[0030] The purpose of the present invention is achieved as follows: a method for rapid docking of weakly rigid cylindrical products without posture adjustment, including a docking platform and a modular sled system. It is further explained that the docking platform includes a workbench and a linear module to create a working plane and high-precision and stable X-direction movement capability for product docking; the modular sled system includes a frame, a base plate, an arc guide rail and a functional component. It is further explained that the base plate is the central structure of the sled system, and the arc guide rail and the functional component are installed on the base plate, and basic positioning is achieved with the help of a positioning reference surface. Through integrated design and manufacturing technology, the Z and Y adjustment accuracy of the sled system can be maintained at 0.05mm, and the roll jump is maintained within 0.08mm. Multiple groups of sled systems cooperate to achieve Z, Y, pitch and yaw posture control of cylindrical products, and with the help of weak rigid assembly theory, the smooth docking of products can be achieved with an installation accuracy greater than the assembly clearance (0.025mm). The arc guide rail is installed on the base plate as a circular motion mover, and the slider is installed on the frame as a circular motion stator. The arc guide rail-slider module provides high-precision rolling motion capability for the holding ring and the product.

[0031] In actual use, the weak rigid cylindrical product is placed on the support component of the sled system through the power handling equipment, and then the upper holding ring is closed, and the clamping component provides clamping force for the product to generate sufficient friction to prevent the product from axial movement. After multiple groups of cylindrical products are clamped, the workstation can complete all docking tasks.

[0032] The following describes the implementation mode with reference to the accompanying drawings:

[0033] Figure 1 It is a schematic diagram of the application of the present invention, including a modular slide system 1 installed on a linear guide slider 3 of a docking platform 2. Multiple sets of slide systems can be used to support and clamp cylindrical product cabins of various forms and sizes.

[0034] Figure 2 It is a schematic diagram of the structure of the present invention, including a frame 8, an upper holding ring base plate 6 and an upper holding ring base plate 7. Among them, the parts above the quick connector are all called holding ring clamps (referred to as holding rings). When the present invention is used, the support assembly 27 and the arc guide rail 16 installed on the upper holding ring base plate 6 and the lower holding ring base plate 7 are used to provide high-precision Y, Z direction, yaw, pitch attitude positioning, and circumferential rolling motion for the clamped cylindrical product cabin, so that the cylindrical product cabin section can be docked without attitude adjustment.

[0035] Figure 3 This is a structural diagram of the frame of the present invention. In addition to the main mechanical structure, it also includes a radial stop pin 12 and a friction block 13. When the frame 8 is installed, the cylindrical pin and the diamond pin are used to control the Y-direction and yaw attitude of the frame and the linear guide slider 3. The arc guide slider 10 is installed on the positioning surface of the frame through the wedge block 11 and the fixing bolt. The frame base 9 and the linear guide slider 3 are basically positioned by the positioning pin 15, and are adjusted and tightened by the mounting bolt 14 and the lateral top screw 28 to limit the Y-direction center distance of multiple groups of holding rings. The stop pin 12 and the speed-limiting friction block 13 are arranged radially on the same side of the frame, which serves the purpose of limiting the rolling angle of the holding ring. Among them, the speed-limiting friction block 13 is connected to the frame by bolts, and the friction block adjusting bolt 30 adjusts the contact force between the friction block and the outer surface of the upper holding ring base plate 6 and the lower holding ring base plate 7, thereby adjusting the rolling motion speed of the holding ring.

[0036] Figure 4 In the present invention, the arc guide rail-slider is used as the stator of the moving part of the holding ring. When installing, the outer contour and upper surface of the slider are used as radial and axial positioning references, and the wedge block 11 is used to provide radial clamping of the slider. Figure 3As shown. Two groups of 180° arc guide rails 16 are used as movers of the holding ring motion components, which are respectively installed on the upper holding ring base plate 6 and the lower holding ring base plate 7, and cooperate with the guide rail-slider. With the help of various components, the cylindrical product cabin is driven to perform high-precision rolling motion. When the arc guide rail 16 is installed, the outer diameter of the guide rail and the guide rail mounting groove 17 on the upper holding ring base plate 6 and the lower holding ring base plate 7 are used as positioning references, and a number of clamping bolts are opened on the inner diameter for radial clamping of the guide rail, and the guide rail is axially clamped through the end face threaded holes. The holes and conical nails of the self-locking rivet 18 are respectively installed on the open ends of the upper holding ring base plate 6 and the lower holding ring base plate 7, and the two cooperate to realize the self-locking of the holding ring closure. The upper holding ring base plate 6 and the lower holding ring base plate 7 are installed with threaded holes arranged in a 30° division, which are used to install various functional components such as the clamping assembly 26 and the support assembly 27. The combined connector 21 of the upper holding ring base plate 6 and the lower holding ring base plate 7 and the combined connecting groove 22 of the lower holding ring base plate are connected through an oil-free bushing 23, which provides a rotation function while minimizing the assembly gap between the upper and lower holding rings and improving the Y-axis precision of the holding rings. In addition, when the clamping assembly 26 and the support assembly 27 are installed, the inner diameter of the base plate is also used as the positioning reference surface. The clamping assembly 26 and the support assembly 27 that are in direct contact with the product surface have a contact surface with the same curvature or surface feature as the outer diameter of the product. With the help of the positioning method and the good interchangeability provided by the machining accuracy, the contact parts can be replaced to apply different models of weak rigid cylindrical products. The Z-axis precision of the product concerned in the present invention refers to the relative precision of the axes of each slide system, and this precision is guaranteed based on the machining accuracy.

[0037] Before using the present invention, the frame mounting plate is first mounted on the linear guide slider 3 using the positioning pin 15 and the mounting bolt 14, and the Y-direction and yaw attitude of the entire holding ring is adjusted using a set of lateral top screws 28. After the holding ring is installed, the center elevation of the holding ring and the Y-direction relative positions of multiple sets of holding rings are calibrated using a three-coordinate measuring instrument, and the position accuracy of all sled systems is adjusted to within the tolerance range based on the external reference.

[0038] When the present invention is used, after the logistics is transferred to the workstation, the self-locking rivet 18 is manually pressed, the upper holding ring base plate 6 and the lower holding ring base plate 7 are unlocked, and the operator uses the handle 24 to open the upper holding ring and wait until the product is loaded. The product is placed on two sets of holding ring support assemblies 27 by hoisting or manual handling. Then the handle 24 is manually pulled to close the upper holding ring. During the process, the clamping assembly 26 is in a flexible state, and the butterfly spring provides a pre-tightening force so that the pressing contact block and the product surface are completely fitted. When the upper and lower holding rings are closed, the rivet 18 is automatically locked. Then, the operator rotates the locking knob 31 to put the clamping assembly 26 in a rigid state, and the product is completely clamped and fixed. When the product is docked, the operator pulls up the stop pin 12 and rotates it 90° to an empty position. At this time, the rolling direction of the holding ring is in an active state. Then the operator operates the handle 24 to easily rotate the holding ring and the product. When the angular adjustment of the product is completed, the operator puts down the stop pin 12 and places it in the working position, or tightens the friction block adjustment bolt 30 to stabilize the rolling direction of the holding ring. Then, the operator pushes the slide system axially along the linear guide rail 5 until the two products are docked. After docking, the operator releases the locking knob 31, the product is out of the fully positioned state, the operator rotates the holding ring and puts it in the initial position with the help of the marking scale. Then, the operator presses the self-locking rivet 18, opens the holding ring, and lifts the docked product out of the current work station.

[0039] In summary, a non-attitude adjustment quick docking system and method for weak rigid cylindrical products are applied to the docking and assembly of weak rigid cylindrical products on the production line. The method relies on the non-attitude adjustment docking system, which specifically includes a docking platform and a modular sled system. The docking platform includes a workbench and a linear guide module; the modular sled system includes a frame, a base plate, an arc guide, and a functional component, which is installed on the linear guide slider through the frame. After integrated design processing and initial calibration and debugging, the non-attitude adjustment docking system provides the product with high-precision X-direction and rolling motion capabilities, as well as reliable Y-direction, pitch, and yaw positioning accuracy, and on this basis, realizes non-attitude adjustment quick docking of weak rigid cylindrical products. In addition, the design of the modular sled system has good functionality and ease of use on the basis of meeting the docking accuracy, and the quick-release properties and good interchangeability of the functional components allow the present invention to provide a unified solution for similar constructions of different models of products and different task requirements by updating different functional components.

Claims

1. A non-adjustment quick docking system for weak rigidity cylindrical products, the non-adjustment quick docking system is designed based on the weak rigidity assembly docking theory, specifically comprising a docking platform (2), a linear guide rail (5) is installed on the docking platform (2), and the characteristics are: Two groups of linear guide sliders (3) are installed on the linear guide (5), and a modular slide system (1) is installed on each group of linear guide sliders (3); the modular slide system (1) comprises a frame (8), an upper embrace ring base plate (6) and a lower embrace ring base plate (7), the lower embrace ring base plate (7) is connected and installed in the frame (8), the upper embrace ring base plate (6) is connected to the lower embrace ring base plate (7), and the upper embrace ring base plate (6) and the lower embrace ring base plate (7) form a complete embrace ring when they are closed; The lower ring base plate (7) comprises a lower base plate (71), a guide rail mounting groove (17), an arc guide rail (16) and a support assembly (27); the guide rail mounting groove (17) is fixedly mounted on the side of the circular wall of the lower base plate (71); the arc guide rail (16) is fixedly mounted on the guide rail mounting groove (17); and two support assemblies (27) are mounted on the functional assembly mounting holes (20) on the opposite sides of the arc guide rail (16) to provide support for the product (4); The upper holding ring base plate (6) comprises an upper base plate (61), a guide rail mounting groove (17), an arc guide rail (16) and a support assembly (61); the guide rail mounting groove (17) is also fixedly mounted on the side of the circular wall of the upper base plate (61); the arc guide rail (16) is also fixedly mounted on the guide rail mounting groove (17); the clamping assembly (26) is mounted on the opposite side of the arc guide rail (16) through the functional component mounting hole (20) and is used to fix the product (4); The inner wall of the frame (8) is fixedly connected to one side of the circular arc guide slider (10), and the circular arc guide slider (10) is installed on the positioning surface of the frame (8) through a wedge block (11) and a fixing bolt; a slideway is provided on the other side of the circular arc guide slider (10), and the circular arc guide (16) is embedded in the slideway of the circular arc guide slider (10); the lower surface of the frame (8) is installed on the frame base (9) through bolts, and the frame base (9) is installed on the linear guide slider (3) through bolts (14), and is positioned by a positioning pin (15) and a top screw (28); During operation, two cylindrical products (4) to be docked are placed one by one into a modular slide system (1) support assembly (27), the upper embracing ring base plate (6) and the lower embracing ring base plate (7) are closed, the pressing assembly (26) and the support assembly (27) fix the products (4), and then the two modular slide systems (1) are brought close to bring the two cylindrical products (4) to be docked close to each other, and then one modular slide system (1) is rotated to align one cylindrical product (4) with the position where it is connected to another cylindrical product (4); then the cylindrical products (4) to be docked are further brought close to each other until the docking is successful.

2. According to claim 1, a non-adjustable quick docking system for weak rigidity cylindrical products is characterized in that: The support assembly (27) is also provided with a clamping assembly (26), and the clamping assembly (26) is also provided with a locking knob (31).

3. A non-adjustable quick docking system for weak rigidity cylindrical products according to claim 1 or 2, characterized in that: A handle (24) and a lifting ring (25) are also provided on the side of the circular arc guide rail (16) away from the circular arc guide rail slider (10), and the handle (24) is used to rotate the circular arc guide rail (16).

4. The non-adjustable quick docking system for weak rigidity cylindrical products according to claim 3, characterized in that: A self-locking rivet (18) is provided at the connection between the upper base plate (61) and the lower base plate (71); a combined connecting head (21) is provided at the end of the connection of the upper base plate (61), and a combined connecting groove (22) is provided at the end of the connection of the lower base plate (71); the combined connecting head (21) and the combined connecting groove (22) are matched; a buffer block (29) is also provided at the end of the upper base plate (61) on the side of the combined connecting head (21), and an oil-free bushing (23) is also provided at the end of the lower base plate (71) on the side of the combined connecting groove (22).

5. The non-adjustable quick docking system for weak rigidity cylindrical products according to claim 4, characterized in that: The stop pin (12) and the speed-limiting friction block 13 are radially arranged on the same side of the frame (8) and the friction block adjustment bolt (30) fixes the speed-limiting friction block (13) to the frame (8); the stop pin (12) plays a role in limiting the rolling angle of the holding ring.

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