Quick replacement structure for large functional part and fiber placement machine

Abstract

The invention provides a quick replacement structure for a large functional component and a fiber placement machine, and belongs to the technical field of fiber placement machines, the quick replacement structure for the large functional component comprises a fixing unit and a moving unit, the fixing unit comprises a base, and the edge of the lower end of the base is provided with a positioning shaft and a tensioning and locking assembly; the moving unit comprises a connecting body, an outer positioning sleeve and a blind rivet are arranged on the edge of the upper end of the connecting body, the outer positioning sleeve can be connected with the corresponding positioning shaft in an inserted mode, and the blind rivet can be clamped by the corresponding tensioning and locking assembly; an upper combination plate is installed in the middle of the lower end of the base in a floating mode, and a plug-in female head and an inner positioning sleeve are arranged on the upper combination plate. A lower combination plate is installed in the middle of the upper end of the connecting body, a plug-in male head and a positioning pin are arranged on the lower combination plate, the plug-in male head can be connected with the corresponding plug-in female head in an inserted mode, and the positioning pin can be connected with the corresponding inner positioning sleeve in an inserted mode. According to the invention, on the basis of ensuring the position precision of the fiber placement head, the impact and wear of each plug in the replacement process can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of wire laying machines, and in particular relates to a quick-changing structure for large functional components and a wire laying machine. Background Art

[0002] With the continuous progress of materials science, high-performance and ultra-high-performance carbon fiber composites have received extensive attention and application. This material not only has excellent mechanical properties, but also shows great potential in aerospace, automobile manufacturing, sporting goods and other fields.

[0003] At the same time, with the diversified demands for composite products, the wire laying heads in the production process of composite products also need to be frequently replaced according to different materials and process requirements to meet process requirements. At present, the traditional manual replacement method is not only time-consuming and labor-intensive, but also difficult to ensure the accuracy and consistency of the replacement process, thus limiting the efficient operation of the wire laying machine and the improvement of process quality. In view of this, most of the existing wire laying machines are equipped with a wire laying head quick-change device, and the wire laying head quick-change device is used to achieve fast, accurate and reliable replacement of the wire laying head, so as to improve the production efficiency and flexibility of the wire laying machine.

[0004] However, the existing wire placing head quick-change device still has certain limitations when in use: although the existing wire placing head can achieve rapid disassembly and assembly between the wire placing head and the swinging main body through multiple plug-in structures, since the various plug-in structures on the existing wire placing head quick-change device are fixed structures, during the plug-in process of the fixed end and the mobile end, it is easy for the assembly and manufacturing errors of various components to cause interference between the fixed end and the mobile end in the wire placing head quick-change device during the replacement process, thereby reducing the plug-in accuracy of each plug, and even in severe cases directly causing impact and wear to each plug during the plug-in process. Summary of the invention

[0005] The purpose of the present invention is to propose and design a quick-change structure and a wire laying machine for large functional components in response to the problems of low insertion accuracy and easy wear of plugs in the existing wire laying head quick-change device during use, so that the above-mentioned problems can be overcome, and the impact and wear of each plug during the replacement process can be reduced while ensuring the positioning accuracy of the wire laying head.

[0006] In order to achieve the above-mentioned objectives, on the one hand, the present invention provides a quick replacement structure for large functional components, which includes a fixed unit and a movable unit. The fixed unit includes a base, an upper end of the base is provided with an upper equipment matching portion, and the edge of the lower end of the base is provided with a positioning shaft and a tensioning and locking assembly; the movable unit includes a connector, the edge of the upper end of the connector is provided with an outer positioning sleeve and a pull pin, the outer positioning sleeve can be plugged with the corresponding positioning shaft, and the pull pin can be clamped by the corresponding tensioning and locking assembly; an upper combination plate is floatingly installed in the middle of the lower end of the base, and a mating female head and an inner positioning sleeve are provided at the upper combination plate; a lower combination plate is installed in the middle of the upper end of the connector, and a mating male head and a positioning pin are provided at the lower combination plate, the mating male head can be plugged with the corresponding mating female head, and the positioning pin can be plugged with the corresponding inner positioning sleeve; and a lower equipment matching portion is provided at the lower end of the connector. At this time, since the present invention floats the upper combined plate on the base, during the plug-in process of the fixed unit and the movable unit, the relative position relationship between the plug-in male head and the plug-in female head can be corrected by the floating upper combined plate, thereby reducing the impact it receives during the plug-in process, thereby increasing the service life of each plug-in structure provided at the upper combined plate and the lower combined plate; at the same time, the floating positioning method of the upper combined plate also reduces the accuracy requirements between the rivet and the tensioning and locking assembly, the positioning shaft and the outer positioning sleeve, and improves the structural process adaptability of rapid replacement of large functional components.

[0007] Furthermore, at least two mounting holes are passed through between the upper surface and the lower surface of the upper assembly plate, a sleeve is placed in each mounting hole, a gap exists between the outer wall of the sleeve and the hole wall of the mounting hole, an outer flange is arranged after the lower end of the sleeve extends out of the mounting hole, and a gap exists between the upper end surface of the outer flange and the lower end surface of the upper assembly plate; the screw rod of the screw passes through the sleeve from bottom to top and is threadedly connected with the base, and the upper assembly plate is detachably mounted on the base. At this time, the radial clearance value between the hole wall of the mounting hole and the outer wall of the sleeve is the radial floating value of the upper assembly plate, and the axial clearance value between the upper assembly plate and the outer flange of the sleeve is the axial floating value of the upper assembly plate.

[0008] Further, the female plug includes an electrical female plug, the male plug includes an electrical male plug, and the electrical female plug can be electrically connected to the corresponding electrical pipeline in the connection equipment at the fixed unit, the electrical male plug can be electrically connected to the corresponding electrical pipeline in the connection equipment at the mobile unit, and plugged with the electrical female plug.

[0009] Furthermore, the female plug includes a pneumatic female plug, and the male plug includes a pneumatic male plug, and the pneumatic male plug can be connected to the corresponding pneumatic pipeline in the connection equipment at the mobile unit, and the pneumatic female plug can be connected to the corresponding pneumatic pipeline in the connection equipment at the fixed unit, and plugged with the pneumatic male plug.

[0010] Furthermore, the inner positioning sleeve includes at least one inner positioning sleeve 1, the inner cavity of the inner positioning sleeve 1 is cylindrical; the positioning pin includes at least one cylindrical pin, which is plugged into the corresponding inner positioning sleeve 1 and positions the upper and lower combined plates.

[0011] Furthermore, the inner positioning sleeve includes at least one inner positioning sleeve 2, the inner cavity of the inner positioning sleeve 2 is rhombus-shaped; the positioning pin includes at least one rhombus-shaped pin, which is plugged into the corresponding inner positioning sleeve 2 and positions the upper and lower assembly plates.

[0012] Furthermore, the lower part of the positioning shaft is sequentially arranged as a truncated cone part and a shaft head part from top to bottom, the lower end of the truncated cone part is the end with a small diameter, and the lower end of the truncated cone part is connected to the upper end of the shaft head part by a smooth transition through an inner concave surface, and the edge of the upper end of the shaft head part and the edge of the lower end of the shaft head part are both provided with chamfers; the inner cavity of the outer positioning sleeve is a stepped hole that is larger at the top and smaller at the bottom, the step surface of the stepped hole is arranged obliquely, and the large hole of the stepped hole can fit with the upper part of the positioning shaft, and the lower part of the stepped hole can fit with the shaft head part. At this time, through the above-mentioned special structural shape arranged at the lower end of the positioning shaft of the present invention, and the special arrangement of the inner cavity of the outer positioning sleeve, the chamfered structure can be used to perform horizontal position correction and angle correction during the replacement of the wire laying head, that is, the rough positioning, semi-fine positioning and fine positioning between the fixed unit and the movable unit are completed at the same time, which solves the technical problem of failure caused by the position error or angle error or the combined position angle error of the wire laying head during the grasping process of the wire laying head, and at the same time improves the positioning and repeated positioning accuracy of the replacement of the wire laying head.

[0013] Furthermore, four positioning shafts are evenly arranged at the lower end of the base along the circumferential direction, and four outer positioning sleeves are evenly arranged at the upper end of the connector along the circumferential direction, and the four outer positioning sleeves correspond to the four positioning shafts one by one.

[0014] Furthermore, eight tensioning and locking assemblies are evenly arranged along the circumference at the lower end of the base, and eight pull pins are evenly arranged along the circumference at the upper end of the connecting body. The eight tensioning and locking assemblies correspond to the eight pull pins one by one, and the connection between the fixed unit and the mobile unit can be achieved through the clamping action between the eight tensioning and locking assemblies and the eight pull pins.

[0015] On the other hand, a wire laying machine is also provided, which includes a wire laying machine main body, on which a wire laying head driving mechanism and a wire laying head are arranged; it also includes the above-mentioned quick replacement structure for large functional components, the fixed unit of the above-mentioned quick replacement structure for large functional components is installed at the power output end of the wire laying head driving mechanism, the movable unit of the above-mentioned quick replacement structure for large functional components is installed at the connecting end of the wire laying head, and the quick connection between the wire laying head and the wire laying head driving mechanism is realized through the above-mentioned quick replacement structure for large functional components.

[0016] It can be seen from the above technical solutions that the present invention has the following advantages: 1. Since the present invention floats the upper assembly plate on the base, during the plugging process of the fixed unit and the movable unit, the relative position relationship between the plugging male head and the plugging female head can be corrected by the floating upper assembly plate, thereby reducing the impact it bears during the plugging process, thereby increasing the service life of each plugging structure provided at the upper assembly plate and the lower assembly plate; at the same time, the floating positioning method of the upper assembly plate also reduces the accuracy requirements between the pull pin and the tension locking assembly, the positioning shaft and the outer positioning sleeve, and improves the process adaptability of the rapid replacement structure of large functional components; 2. Through the special structural shape set at the lower end of the positioning shaft of the present invention, the chamfered structure can be used to perform horizontal position correction and angle correction during the replacement of the wire laying head, that is, the coarse positioning, semi-fine positioning and fine positioning between the fixed unit and the mobile unit are completed at the same time, which solves the technical problems caused by the position error or angle error or the combined position and angle error of the wire laying head during the grasping process of the wire laying head, and at the same time improves the positioning and repeated positioning accuracy of the wire laying head replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 It is a bottom view of the fixing unit in the first embodiment of the present invention; Figure 2 is a top view of the mobile unit in the first embodiment of the present invention; Figure 3 This is a schematic diagram of the connection between the fixed unit and the mobile unit in the first embodiment of the present invention; Figure 4 for Figure 3 The enlarged schematic diagram of point A in the middle; Figure 5 for Figure 3 The enlarged schematic diagram of point B in the middle; Figure 6 This is a schematic diagram of the installation of the upper combined plate in the first embodiment of the present invention; Figure 7 for Figure 6 The enlarged schematic diagram of the center C; Figure 8 It is a structural diagram of embodiment 2 of the present invention.

[0019] In the figure: 100, fixed unit; 200, mobile unit; 300, wire placement head driving mechanism; 400, wire placement head; 101, base; 102, tightening and locking assembly; 103, positioning shaft; 1031, truncated cone; 1032, shaft head; 104, upper assembly plate; 105, inner positioning sleeve 2; 106, pneumatic plug female connector; 107, electrical plug female connector; 108, inner positioning sleeve 1; 109, screw; 110, shaft sleeve; 201, connector; 202, rivet; 203, outer positioning sleeve; 204, lower assembly plate; 205, diamond pin; 206, cylindrical pin; 207, pneumatic male plug; 208, electrical male plug; L is the position tolerance of the fixed unit and the movable unit in the horizontal direction, m is the angular tolerance of the fixed unit and the movable unit in the vertical plane; n is the radial clearance value between the hole wall of the mounting hole and the outer wall of the sleeve; p is the axial clearance value between the upper combination plate and the outer flange edge of the sleeve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1 like Figures 1 to 7 As shown, the first embodiment provides a quick replacement structure for large functional components, which includes a fixing unit 100 for installation on a device body, and a moving unit 200 for installation on the component to be replaced.

[0022] like Figure 1 As shown, the fixing unit 100 includes a base 101, and an upper device matching portion is provided at the upper end of the base 101, and can be installed on the corresponding device body by means of fasteners such as bolts or a clamping mechanism and other structures. A positioning shaft 103 and a tensioning and locking assembly 102 are provided at the edge of the lower end of the base 101. The number of the positioning shafts 103 is four, and the four positioning shafts 103 are evenly arranged at the lower end of the base 101 along the circumference of the base 101; the shape of the lower part of the positioning shaft 103 is a special shape, specifically, as shown in FIG. Figure 4 , Figure 5As shown, the lower part of the positioning shaft 103 is sequentially arranged as a truncated cone 1031 and a shaft head 1032 from top to bottom, and the lower end of the truncated cone 1031 is the end with a smaller diameter, the lower end of the truncated cone 1031 and the upper end of the shaft head 1032 are smoothly connected through an inner concave surface, and the edge of the upper end of the shaft head 1032 and the edge of the lower end of the shaft head 1032 are both provided with chamfers. The number of the tensioning and locking assemblies 102 is eight, and the eight tensioning and locking assemblies 102 are evenly arranged at the lower end of the base 101 along the circumferential direction, and two tensioning and locking assemblies 102 are arranged between any two adjacent positioning shafts 103.

[0023] An upper assembly plate 104 is installed in a floating manner in the middle of the lower end of the base 101. Specifically, Figure 6 , Figure 7 As shown, at least two mounting holes are penetrated between the upper surface and the lower surface of the upper assembly plate 104, and a sleeve 110 is placed in each mounting hole. There is a gap between the outer wall of the sleeve 110 and the hole wall of the mounting hole. The lower end of the sleeve 110 is provided with an outer flange after extending out of the mounting hole, and there is a gap between the upper end surface of the outer flange and the lower end surface of the upper assembly plate 104; the screw rod of the screw 109 penetrates the sleeve 110 from bottom to top and is threadedly connected with the base 101, and the upper assembly plate 104 is detachably mounted on the base 101. At this time, the upper assembly plate 104 can move horizontally (i.e., radially floating) and vertically (i.e., axially floating) relative to the base 101, and the radial clearance value between the hole wall of the mounting hole and the outer wall of the sleeve 110 is the radial floating value of the upper assembly plate 104, and the axial clearance value between the upper assembly plate 104 and the outer flange of the sleeve 110 is the axial floating value of the upper assembly plate 104.

[0024] In addition, the first embodiment of the present invention is also provided with a mating female connector and an inner positioning sleeve at the upper assembly plate 104. The mating female connector includes an electrical mating female connector 107 and a pneumatic mating female connector 106, and the electrical mating female connector 107 can be electrically connected to the corresponding electrical pipeline in the device connected to the fixed unit 100, and the pneumatic mating female connector 106 can be connected to the corresponding pneumatic pipeline in the device connected to the fixed unit 100. The inner positioning sleeve includes at least one inner positioning sleeve 1 108, and the inner cavity of the inner positioning sleeve 1 108 is cylindrical; the inner positioning sleeve also includes at least one inner positioning sleeve 2 105, and the inner cavity of the inner positioning sleeve 2 105 is rhombus-shaped.

[0025] like Figure 2As shown, the mobile unit 200 includes a connecting body 201, and a lower equipment matching portion is provided at the lower end of the connecting body 201, and can be installed on the corresponding part to be replaced by means of fasteners such as bolts or structures such as a clamping mechanism. An outer positioning sleeve 203 and a rivet 202 are provided at the edge of the upper end of the connecting body 201. Among them, the number of the outer positioning sleeves 203 is four, and the four outer positioning sleeves 203 are evenly arranged at the upper end of the connecting body 201 along the circumference of the connecting body 201; and the four outer positioning sleeves 203 can be plugged in and correspond to the four positioning shafts 103 one by one. At the same time, the shape of the inner cavity of the outer positioning sleeve 203 is stepped. Specifically, as Figure 4 , Figure 5 As shown, the inner cavity of the outer positioning sleeve 203 is a stepped hole that is larger at the top and smaller at the bottom, and the step surface of the stepped hole is inclined, so that the large hole of the stepped hole can fit with the upper part of the positioning shaft 103, and the lower part of the stepped hole can fit with the shaft head 1032. In this way, through the above-mentioned special structural shape set at the lower end of the positioning shaft 103 of the present invention, and the special setting of the inner cavity of the outer positioning sleeve 203, the rounded corner structure can be used to correct the horizontal position and angle during the replacement of the wire laying head, that is, the rough positioning, semi-fine positioning and fine positioning between the fixed unit 100 and the mobile unit 200 are completed at the same time, which solves the technical problem of failure caused by the position error or angle error or the combined position and angle error of the wire laying head during the grasping process of the wire laying head, and at the same time improves the positioning and repeated positioning accuracy of the replacement of the wire laying head.

[0026] The number of the pull studs 202 is eight, and the eight pull studs 202 are evenly arranged at the upper end of the connecting body 201 along the circumference of the connecting body 201, and the eight pull studs 202 can be clamped with the eight tensioning and locking assemblies 102 in a one-to-one correspondence to achieve the connection between the fixed unit 100 and the movable unit 200.

[0027] A lower assembly plate 204 is installed in the middle of the upper end of the connector 201, and a male plug and a positioning pin are provided at the lower assembly plate 204. The male plug includes an electrical male plug 208 and a pneumatic male plug 207, and the electrical male plug 208 can be electrically connected to the corresponding electrical pipeline in the device connected to the mobile unit 200, and plugged with the electrical female plug 107 in the fixed unit 100; the pneumatic male plug 207 can be connected to the corresponding pneumatic pipeline in the device connected to the mobile unit 200, and plugged with the pneumatic female plug 106 in the fixed unit 100 to connect the corresponding pipelines. The positioning pin includes at least one cylindrical pin 206, and the cylindrical pin 206 is plugged into the corresponding inner positioning sleeve 108 to position the upper combination plate 104 and the lower combination plate 204; the positioning pin also includes at least one diamond pin 205, which is plugged into the corresponding inner positioning sleeve 105 to position the upper combination plate 104 and the lower combination plate 204. At this time, during the plugging process of the fixed unit 100 and the movable unit 200, since the first embodiment of the present invention floats the upper assembly plate 104 on the base 101, and in addition to respectively providing corresponding plug-in female heads and plug-in male heads on the upper assembly plate 104 and the lower assembly plate 204, additional positioning pins and inner positioning sleeves are provided, which can correct the relative position relationship between the plug-in male head and the plug-in female head through the floating of the upper assembly plate 104, reduce the impact it receives during the plug-in process, and thereby improve the service life of each plug-in structure provided at the upper assembly plate 104 and the lower assembly plate 204; at the same time, the floating positioning method of the upper assembly plate 104 also reduces the accuracy requirements between the pull pin 202 and the tensioning and locking assembly 102, and the positioning shaft 103 and the outer positioning sleeve 203, thereby improving the process adaptability of the rapid replacement structure of large functional components.

[0028] Based on this, the first embodiment can not only realize accurate plugging between the fixed unit 100 and the movable unit 200, but also reduce the impact and wear of each plug during the replacement process while ensuring the position accuracy of the wire placing head.

[0029] Embodiment 2 like Figure 8 As shown, the second embodiment provides a wire laying machine, which includes a wire laying machine body, on which a wire laying head driving mechanism 300 and a wire laying head are arranged; it also includes the above-mentioned quick replacement structure for large functional components, the above-mentioned fixed unit 100 of the quick replacement structure for large functional components is installed at the power output end of the wire laying head driving mechanism 300, the above-mentioned mobile unit 200 of the quick replacement structure for large functional components is installed at the connecting end of the wire laying head, and the quick connection between the wire laying head and the wire laying head driving mechanism 300 is realized through the above-mentioned quick replacement structure for large functional components.

[0030] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0031] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A quick replacement structure for large functional components, comprising a fixed unit (100) and a movable unit (200), wherein the fixed unit (100) comprises a base (101), an upper device matching portion is arranged at the upper end of the base (101), and a positioning shaft (103) and a tensioning and locking assembly (102) are arranged at the edge of the lower end of the base (101); the movable unit (200) comprises a connecting body (201), an outer positioning sleeve (203) and a pull pin (202) are arranged at the edge of the upper end of the connecting body (201), the outer positioning sleeve (203) can be plugged with the corresponding positioning shaft (103), and the pull pin (202) can be clamped by the corresponding tensioning and locking assembly (102); characterized in that: An upper assembly plate (104) is installed in a floating manner in the middle of the lower end of the base (101), and a plug-in female head and an inner positioning sleeve are provided at the upper assembly plate (104); a lower assembly plate (204) is installed in the middle of the upper end of the connector (201), and a plug-in male head and a positioning pin are provided at the lower assembly plate (204), and the plug-in male head can be plugged into the corresponding plug-in female head, and the positioning pin can be plugged into the corresponding inner positioning sleeve; and a lower equipment matching portion is provided at the lower end of the connector (201).

2. The rapid replacement structure for large functional components according to claim 1, characterized in that: At least two mounting holes are formed between the upper surface and the lower surface of the upper assembly plate (104), a shaft sleeve (110) is placed in each mounting hole, a gap exists between the outer wall of the shaft sleeve (110) and the hole wall of the mounting hole, an outer flange is provided at the lower end of the shaft sleeve (110) after extending out of the mounting hole, and a gap exists between the upper end surface of the outer flange and the lower end surface of the upper assembly plate (104); the screw rod of the screw (109) passes through the shaft sleeve (110) from bottom to top and is threadedly connected to the base (101).

3. The rapid replacement structure for large functional components according to claim 1, characterized in that: The mating female connector includes an electrical mating female connector (107), and the mating male connector includes an electrical mating male connector (208).

4. The rapid replacement structure for large functional components according to claim 1, characterized in that: The mating female connector includes a pneumatic mating female connector (106), and the mating male connector includes a pneumatic mating male connector (207).

5. The rapid replacement structure for large functional components according to claim 1, characterized in that: The inner positioning sleeve includes at least one inner positioning sleeve one (108), the inner cavity of the inner positioning sleeve one (108) is cylindrical; the positioning pin includes at least one cylindrical pin (206), and the cylindrical pin (206) is plugged into the corresponding inner positioning sleeve one (108).

6. The rapid replacement structure for large functional components according to claim 1, characterized in that: The inner positioning sleeve comprises at least one inner positioning sleeve 2 (105), the inner cavity of the inner positioning sleeve 2 (105) being in the shape of a rhombus; the positioning pin comprises at least one rhombus-shaped pin (205), the rhombus-shaped pin (205) being plugged into the corresponding inner positioning sleeve 2 (105).

7. The rapid replacement structure for large functional components according to claim 1, characterized in that: The lower part of the positioning shaft (103) is sequentially arranged as a truncated cone part (1031) and a shaft head part (1032) from top to bottom, the lower end of the truncated cone part (1031) is an end with a smaller diameter, and the lower end of the truncated cone part (1031) is smoothly connected to the upper end of the shaft head part (1032) through an inner concave surface, and the edge of the upper end of the shaft head part (1032) and the edge of the lower end of the shaft head part (1032) are both provided with chamfered corners; the inner cavity of the outer positioning sleeve (203) is a stepped hole with a larger upper part and a smaller lower part, the step surface of the stepped hole is arranged inclined, and the large hole of the stepped hole can fit with the upper part of the positioning shaft (103), and the lower part of the stepped hole can fit with the shaft head part (1032).

8. The rapid replacement structure for large functional components according to claim 1, characterized in that: The lower end of the base (101) is evenly provided with four positioning shafts (103) along the circumferential direction, and the upper end of the connecting body (201) is evenly provided with four external positioning sleeves (203) along the circumferential direction, and the four external positioning sleeves (203) correspond one to one to the four positioning shafts (103).

9. The rapid replacement structure for large functional components according to claim 1, characterized in that: The lower end of the base (101) is evenly provided with eight tensioning and locking assemblies (102) along the circumferential direction, and the upper end of the connecting body (201) is evenly provided with eight pull pins (202) along the circumferential direction, and the eight tensioning and locking assemblies (102) correspond to the eight pull pins (202) one by one.

10. A wire laying machine, comprising a wire laying machine body, on which a wire laying head driving mechanism (300) and a wire laying head (400) are arranged; characterized in that: It also includes a quick-change structure for large functional components according to any one of claims 1 to 9, wherein the fixed unit (100) of the quick-change structure for large functional components is installed at the power output end of the wire laying head drive mechanism (300), and the movable unit (200) of the quick-change structure for large functional components is installed at the connection end of the wire laying head (400).

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