Assembly method and assembly system for space angle cardan shaft

Abstract

The invention discloses an assembling method and an assembling system for a space angle cardan shaft, and belongs to the technical field of cardan shaft production equipment. The method comprises the following steps that an assembling system is manufactured, the assembling system is adopted to fix and clamp a universal shaft from the two ends, the universal shaft is hoisted to the working height through external hoisting equipment, then force is applied to the universal shaft to move in the X direction, and the universal shaft is close to or away from a mounting face; force is applied to the cardan shaft so that the cardan shaft can move in the Z direction; force is applied to the cardan shaft so that the cardan shaft can move in the Y direction. By controlling the universal shaft to move in the X direction, the Y direction and the Z direction, accurate positioning of the size of the universal shaft installation structure is achieved, installation accuracy can be effectively improved, and installation errors caused by accuracy limitation of manual operation or simple mechanical equipment are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of cardan shaft production equipment, and more specifically, relates to an assembly method and an assembly system for a space-angle cardan shaft. Background Art

[0002] The universal joint is a common mechanical component, which is widely used in various mechanical equipment to transmit power and motion. However, the installation process of the universal joint is often complicated, especially for horizontal or inclined universal joints, which require precise positioning and adjustment to ensure their normal operation. In the field of automation equipment, with the development of science and technology, the application of automation equipment is becoming more and more extensive, including the installation of universal joints. However, due to the complex structure of the universal joint and the difficulty of installation, the efficiency and accuracy of the automation equipment when installing the universal joint are affected to a certain extent. In the field of precision positioning technology, although there are some precision positioning devices that can assist in the installation of the universal joint, these devices are expensive and complicated to operate, which is not conducive to large-scale application. For example, Chinese patent CN117754271A discloses an assembly auxiliary tooling for the production of universal couplings.

[0003] The current solution is to install the universal joint manually or with simple tools such as belts, chains, etc., or mechanical equipment. Although manual installation can ensure a certain degree of accuracy, it is inefficient and requires a lot of manpower. Although simple mechanical equipment can improve installation efficiency, its positioning accuracy is not high, which easily leads to unstable installation quality of the universal joint.

[0004] However, the current spatial angle universal joint installation technology has the following major problems: 1) The degree of automation is low, and most of the work needs to be done manually, which is not only time-consuming and labor-intensive, but also inefficient; 2) The installation accuracy is not high. Due to the accuracy limitations of manual operation or simple mechanical equipment, the installation accuracy of the universal joint cannot be guaranteed, which may affect the normal operation of the mechanical equipment; 3) The installation is inconvenient. Whether it is manual installation or mechanical equipment installation, the universal joint needs to be accurately positioned and adjusted, which is often difficult in actual operation, increasing the difficulty of installation. Summary of the invention

[0005] 1. Problem to be solved

[0006] In view of the technical problems existing in the prior art, the present invention provides an assembly method of a spatial angle universal joint, which can at least solve the following problems: 1) The assembly is completed manually, which is time-consuming, labor-intensive and inefficient; 2) Due to the precision limitations of manual operation or simple mechanical equipment, the installation accuracy of the universal joint cannot be guaranteed, and the installation accuracy is not high, which may affect the normal operation of the mechanical equipment; 3) Whether it is manual installation or mechanical equipment installation, the universal joint needs to be accurately positioned and adjusted, which is often difficult in actual operation, increasing the difficulty of installation.

[0007] Another object of the present invention is to provide an assembly system used in the above-mentioned assembly method.

[0008] 2. Technical solution

[0009] In order to solve the above problems, the technical solution adopted by the present invention is as follows:

[0010] The first aspect of the present invention provides a method for assembling a space angle universal shaft, wherein the space angle is 0-15 °, the method comprises the following steps:

[0011] An assembly system is manufactured, wherein the universal shaft is fixed and clamped at both ends by the assembly system, the universal shaft is hoisted to a working height by an external hoisting device, and then a force is applied to the universal shaft to move along the X direction, so that the universal shaft is moved closer to or away from the mounting surface;

[0012] Applying force to the universal shaft so that the universal shaft moves in the Z direction;

[0013] And applying force to the universal shaft makes the universal shaft move in the Y direction.

[0014] The above steps of moving along the X direction, moving along the Y direction, and moving along the Z direction can be exchanged in order without affecting the assembly of the universal joint shaft.

[0015] The second aspect of the present invention provides an assembly system used in the assembly method of the first aspect, comprising: a hanger component for connecting to an external hanging device; the hanger component comprises a first hanger, a second hanger, a third hanger, a fourth hanger and a fifth hanger, wherein the second hanger and the fourth hanger are respectively relatively slidably mounted on the first hanger, the third hanger is relatively slidably mounted on the second hanger, and the fifth hanger is relatively slidably mounted on the fourth hanger;

[0016] And a clamp component for clamping the universal shaft, the clamp component comprises a first clamp and a second clamp, the first clamp is installed on the third hanger, and the second clamp is installed on the fifth hanger.

[0017] According to any embodiment of the second aspect of the object of the present invention, the first hanger is in the shape of a Chinese character 'Ri', and a first motor, a second motor, a first lead screw and a second lead screw are symmetrically installed on the first hanger. The first lead screw is driven by the first motor and the second lead screw is driven by the second motor to rotate; the second hanger and the fourth hanger are slidably connected to the first hanger through a slide rail, and at the same time drive the second hanger and the fourth hanger to move in the horizontal direction, adjust the distance between the second hanger and the fourth hanger, so as to adapt to universal shafts of different lengths.

[0018] According to any embodiment of the second aspect of the object of the present invention, the second hanger and the fourth hanger have the same structure and are in the shape of a Chinese character 'Kuang'. A third motor, a fourth motor, a third lead screw and a fourth lead screw are symmetrically installed on the fourth hanger. The third lead screw is driven by the third motor and the fourth lead screw is driven by the fourth motor to rotate, and at the same time drive the third hanger and the fifth hanger to move in the vertical direction. Among them, the third hanger is slidably connected to the second hanger through a slide rail.

[0019] According to any embodiment of the second aspect of the object of the present invention, the third hanger and the fifth hanger have the same structure and are in the shape of a Chinese character 'Zi'. A fifth motor and a fifth lead screw are installed on the fifth hanger. The fifth lead screw is driven by the fifth motor to rotate, driving the first clamp to move in the horizontal direction. Among them, the first clamp is slidably connected to the fifth hanger through a slide rail.

[0020] According to any embodiment of the second aspect of the object of the present invention, the first clamp and the second clamp have the same structure. The second clamp includes a first caliper, a second caliper, a hydraulic cylinder, a second screw group, a second screw motor group and a connecting frame. The first caliper, the second caliper and the hydraulic cylinder are arranged on the connecting frame. The first caliper and the second caliper are opened and closed by the telescopic hydraulic cylinder. A second screw group and a second screw motor group for driving the screw are installed on the first caliper and / or the second caliper, and the screw is driven by the motor to move in the horizontal direction to adjust the position of the universal shaft flange.

[0021] The first clamp and the second clamp can firmly fix the universal shaft, so that it will not move or skew during the installation process, thereby improving the installation accuracy and efficiency.

[0022] According to any embodiment of the second aspect of the object of the present invention, a movable caliper group is further installed on the first caliper and / or the second caliper for fixing the universal shaft body.

[0023] According to any embodiment of the second aspect of the object of the present invention, rubber heads are installed at the heads of the six screws of the second screw group. When the screw moves and contacts the end face of the universal shaft flange, it can continue to push the flange to move, and at the same time reduce friction, so as to realize the fine adjustment of the flange position in the horizontal and vertical directions.

[0024] According to any embodiment of the second aspect of the present invention, the movable caliper assembly is connected to the corresponding caliper via a ball hinge, so that the system of the present invention can be used to assemble universal joints of different models, lengths and weights.

[0025] According to any embodiment of the second aspect of the present invention, a through hole is provided on the first hanger, which can reduce the weight of the first hanger on one hand, and can oil the first screw rod and the second screw rod through the through hole on the other hand.

[0026] 3. Beneficial effects

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The assembly method of the spatial angle universal shaft of the present invention realizes the precise positioning of the installation structure size of the universal shaft by controlling the movement of the universal shaft in the three directions of X, Y and Z, which can effectively improve the installation accuracy and reduce the installation error caused by manual operation or the accuracy limitation of simple mechanical equipment;

[0029] (2) The assembly method of the spatial angle universal shaft of the present invention optimizes the entire installation process, making the installation process smoother, further improving the efficiency and accuracy of the installation, and can effectively solve the problems of low automation, inconvenient installation, time-consuming and labor-intensive, and low accuracy in the installation process of horizontal or inclined universal shafts;

[0030] (3) The assembly system of the spatial angle universal shaft of the present invention includes a fixture which can firmly fix the universal shaft so that it will not move or deflect during the installation process, thereby improving the accuracy and efficiency of the installation;

[0031] (4) The spatial angle universal shaft assembly system of the present invention automates the entire installation process and accurately controls the movement of the universal shaft through motors and other equipment, greatly reducing the need for manual operation, improving installation efficiency, and also reducing labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0033] Figure 1 It is a structural schematic diagram of an assembly system provided in an embodiment of the present invention;

[0034] Figure 2A front view of an assembly system provided in an embodiment of the present invention;

[0035] Figure 3 A side view of an assembly system provided in an embodiment of the present invention;

[0036] Figure 4 for Figure 1 A magnified view of part A;

[0037] Figure 5 for Figure 2 Enlarged view of part B.

[0038] Description of reference numerals:

[0039] 1. First hanger; 11. First screw rod; 12. Second screw rod; 13. First motor; 14. Second motor; 15. Through hole;

[0040] 2. Second hanger;

[0041] 3. The third hanger;

[0042] 4. First clamp; 41. First screw rod group; 42. First screw rod motor group;

[0043] 5. Fourth hanger; 51. Third motor; 52. Third screw rod; 53. Fourth motor; 54. Fourth screw rod;

[0044] 6. fifth hanger; 61. fifth motor; 62. fifth screw rod;

[0045] 7. Second clamp; 71. Second screw rod group; 72. Second screw rod motor group; 73. Connecting frame; 74. Hydraulic cylinder; 75. First caliper; 76. Second caliper; 77. Active caliper group; 78. Rubber head. DETAILED DESCRIPTION

[0046] The following detailed description of exemplary embodiments of the present invention refers to the accompanying drawings, which form a part of the description, and in which exemplary embodiments of the present invention that can be implemented are shown as examples. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to implement the present invention, it should be understood that other embodiments can be implemented and various changes can be made to the present invention without departing from the spirit and scope of the present invention. The following more detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but is only for the purpose of illustrating and not limiting the description of the characteristics and features of the present invention, so as to propose the best mode for performing the present invention and to enable those skilled in the art to implement the present invention. Therefore, the scope of the present invention is limited only by the appended claims.

[0047] The following detailed description of the present invention and example embodiments may be better understood in conjunction with the accompanying drawings, in which elements and features of the present invention are identified by reference numerals.

[0048] Example 1

[0049] The space angle universal shaft has a wide range of applications. For example, it can be used to support 3D and CAD models, and to transmit in the fields of drones, wind turbines, mechanical manufacturing, and automated production. In addition, for those occasions that require close cooperation and efficient transmission, with the assistance of the angle universal shaft, the working process is smoother and more efficient.

[0050] like Figures 1 to 5 As shown, this embodiment takes the space angle universal shaft used in the rolling mill field as an example, wherein: the space angle is between 0-15° (excluding 0°), specifically 0.5°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14° and 15°, and proposes an assembly system for the space angle universal shaft, the system includes a hanger component for connecting to an external lifting equipment and a clamp component for clamping the universal shaft, wherein the external lifting equipment can use a crane, an electric hoist and the like.

[0051] Specifically, the hanger components include a first hanger 1, a second hanger 2, a third hanger 3, a fourth hanger 5 and a fifth hanger 6, wherein the second hanger 2 and the fourth hanger 5 have the same structure, the third hanger 3 and the fifth hanger 6 have the same structure, and the second fixture 7 and the first fixture 4 have the same structure, which are symmetrically installed at both ends of the first hanger 1. The first hanger 1, the second hanger 2, the third hanger 3, the fourth hanger 5 and the fifth hanger 6 are all made of steel, with high structural strength, meeting the use requirements.

[0052] Furthermore, the clamp component includes the first clamp 4 and the second clamp 7. The first clamp 4 and the second clamp 7 can firmly fix the universal joint from both sides so that it will not move or deflect during the installation process, thereby improving the installation accuracy and efficiency.

[0053] In this embodiment, if Figure 1As shown, the first hanger 1 is in the shape of a Chinese character 'Ri' (日). This structural shape not only provides a high-strength framework for the entire system but also facilitates the coordinated use of external lifting equipment. The first motor 13, the second motor 14, the first lead screw 11, and the second lead screw 12 are symmetrically installed on the first hanger 1. The first motor 13 drives the first lead screw 11 to rotate, and the second motor 14 drives the second lead screw 12 to rotate. The second hanger 2 and the fourth hanger 5 are slidably connected to the first hanger 1 through a slide rail (not marked in the figure). When the first motor 13 and the second motor 14 are started respectively, the first lead screw 11 and the second lead screw 12 can be rotated respectively. The first lead screw 11 and the second lead screw 12 are in threaded cooperation to drive the second hanger 2 and the fourth hanger 5 to move horizontally respectively. The first motor 11 and the second motor 12 can be controlled synchronously or separately, and can respectively achieve forward and reverse rotation.

[0054] At this time, the second hanger 2 and the fourth hanger 5 can move towards each other or away from each other. It is also possible that the second hanger 2 remains stationary, and the fourth hanger 5 moves horizontally inwards or outwards, or the fourth hanger 5 remains stationary, and the second hanger 2 moves horizontally inwards or outwards, adjusting the distance between the second hanger 2 and the fourth hanger 5 to adapt to universal shafts of different lengths.

[0055] In addition, a through hole 15 is provided on the first hanger 1. On the one hand, the through hole 15 can reduce the weight of the first hanger 1. On the other hand, lubricating oil can be added to the first lead screw 11 and the second lead screw 12 through the through hole 15.

[0056] As Figure 3 shown, the second hanger 2 and the fourth hanger 5 have the same structure and are in the shape of a Chinese character 'Kuang' (冂). Since the second hanger 2 and the fourth hanger 5 have the same structure, the structure of the fourth hanger 5 will be mainly introduced here, and the second hanger 2 will not be elaborated. The third motor 51, the fourth motor 53, the third lead screw 52, and the fourth lead screw 54 are symmetrically installed on the fourth hanger 5. The third motor 51 drives the third lead screw 52 to rotate, and the fourth motor 53 drives the fourth lead screw 54 to rotate, simultaneously driving the third hanger 3 and the fifth hanger 6 to move in the vertical direction. Among them, the third hanger 3 is slidably connected to the second hanger 2 through a slide rail.

[0057] The third motor 51 and the fourth motor 53 can move synchronously. When the third motor 51 and the fourth motor 53 are started, the corresponding third lead screw 52 and the fourth lead screw 54 rotate respectively, thereby driving the fifth hanger 6 to move in the vertical direction to achieve rising and falling.

[0058] Combined with Figure 3, it can be seen that at the notch where the fifth hanger 6 can extend out in a "冂" shape, the fifth hanger 6 is limited by the notch to prevent it from exceeding the fourth hanger 5. It should be noted that a sliding rail and dovetail groove matching structure is adopted between the fifth hanger 6 and the fourth hanger 5 to further limit the fifth hanger 6 in the horizontal direction.

[0059] In this embodiment, the third hanger 3 and the fifth hanger 6 have the same structure and are in the shape of . A fifth motor 61 and a fifth lead screw 62 are installed on the fifth hanger 6. Among them, the second fixture 7 is slidably connected to the fifth hanger 6 through a sliding rail. Since the third hanger 3 and the fifth hanger 6 have the same structure, the structure of the fifth hanger 6 is mainly introduced here, and the third hanger 3 will not be elaborated. A fifth motor 61 and a fifth lead screw 62 are installed at the bottom of the fifth hanger 6. When the fifth motor 61 is started, the fifth lead screw 62 rotates, thereby driving the second fixture 7 to move in the horizontal direction. The fifth motor 61 can rotate forward and backward to achieve left and right movement.

[0060] The above-mentioned first motor, second motor, third motor, fourth motor and fifth motor can be selected as servo motors and can all work independently, thus providing the possibility for the micro-adjustment of the spatial angle of the universal shaft.

[0061] In this embodiment, as Figure 3 and Figure 4 shown, since the first fixture 4 and the second fixture 7 have the same structure, the first fixture 4 includes a first screw group 41 and a first screw motor group 42. The structure of the second fixture 7 is mainly introduced here, and the first fixture 4 will not be elaborated. The second fixture 7 includes a connecting frame 73, a first caliper 75 and a second caliper 76. Among them, the first caliper 75 and the second caliper 76 are connected to the connecting frame 73 through bolts and a hydraulic cylinder 74. When the hydraulic cylinder expands and contracts, the first caliper 75 and the second caliper 76 can be controlled to approach or move away from each other, so as to realize the closing and loosening of the fixture.

[0062] Combined with Figure 5 shown, movable caliper groups 77 are installed on the first caliper 75 and the second caliper 76. The movable caliper groups 77 are respectively connected to the corresponding calipers through spherical hinges (not marked in the figure). Among them, the spherical hinge selects a spherical bearing structure, which can flexibly bear the pressure from different surfaces, so that the system of the present invention can meet the assembly use of universal shafts of different models, different lengths and different weights.

[0063] It should be emphasized that during the installation of the universal shaft, the flanges at both ends are used for fixed connection. For the convenience of installation, the first caliper 75 and the second caliper 76 have the same structure. The second caliper 7 has a cavity structure inside. The second caliper 7 is installed with a second screw group 71 and a second screw motor group 72, which are composed of six screws and six motors respectively. The six motors of the second screw motor group 72 can be controlled separately and work relatively independently. When the motor of the second screw motor group 72 is started, the screw corresponding to the second screw group 71 starts to rotate to achieve the left and right movement effect, and the independent flange docking position can be fine-tuned. The six screw heads of the second screw group 71 are installed with rubber heads 78. When the screw moves and contacts the end face of the universal shaft flange, it can continue to push the flange to move, while reducing friction, thereby achieving lateral and longitudinal fine-tuning of the flange position, making the spatial angle of the universal shaft more accurate. According to on-site usage statistics, the spatial angle installation error value is controlled at 0.2-1%, basically achieving precise assembly.

[0064]

[0065] When the hydraulic cylinders on the first clamp 4 and the second clamp 7 are extended so that the clamps tighten the universal shaft, the universal shaft installation device can be lifted by a crane or an electric hoist. When lifted to the working height (generally set to 2-10m), the first motor 11 and the second motor 12 are controlled to move the universal shaft in the X direction to achieve the universal shaft approaching or moving away from the installation surface; the third motor 51 and the fourth motor 53 are controlled to move the universal shaft in the Z direction; the fifth motor 61 is controlled to move the universal shaft in the Y direction. It should be noted that the motor installed on the second hanger 2 is the same as the motor installed on the fourth hanger 5, and can be controlled synchronously or separately; the motor installed on the third hanger 3 is the same as the motor installed on the fifth hanger 6, and can be controlled synchronously or separately. When synchronously controlled, translational movement in the corresponding direction can be achieved, and when individually controlled, deflection movement in the corresponding direction can be achieved.

[0066] During the entire installation process, an automated operation method is adopted, and the movement of the universal shaft is accurately controlled by motors and other equipment, which greatly reduces the need for manual operation, improves the efficiency of installation, and also reduces labor costs; at the same time, the entire installation process is optimized, and through scientific design and arrangement, the installation process is smoother, and the efficiency and accuracy of installation are further improved. The above are the specific operation steps of this embodiment. Through these steps, the problems of low automation, inconvenient installation, time-consuming and labor-intensive, and low precision in the installation process of horizontal and inclined universal shafts can be effectively solved.

[0067] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A method for assembling a space angle universal shaft, wherein the space angle is between 0-15°, characterized in that: The method comprises the following steps: manufacturing an assembly system, using the assembly system to fix and clamp the universal shaft at both ends, lifting the universal shaft to a working height by means of an external lifting device, and then applying force to the universal shaft to move along the X direction so as to make the universal shaft approach or move away from a mounting surface; applying force to the universal shaft to make the universal shaft move in the Z direction; and applying force to the universal shaft to make the universal shaft move in the Y direction.

2. An assembly system used in the assembly method according to claim 1, characterized in that: It includes: A hanger component for connecting to an external hanging device; the hanger component comprises a first hanger (1), a second hanger (2), a third hanger (3), a fourth hanger (5) and a fifth hanger (6), wherein the second hanger (2) and the fourth hanger (5) are respectively mounted on the first hanger (1) in a relatively slidable manner, the third hanger (3) is mounted on the second hanger (2) in a relatively slidable manner, and the fifth hanger (6) is mounted on the fourth hanger (5) in a relatively slidable manner; And a clamp component for clamping a universal shaft, the clamp component comprising a first clamp (4) and a second clamp (7), the first clamp (4) being mounted on a third hanger (3), and the second clamp (7) being mounted on a fifth hanger (6).

3. The assembly system according to claim 2, characterized in that: The first hanger (1) is symmetrically equipped with a first motor (13), a second motor (14), a first screw rod (11) and a second screw rod (12), and the first motor (13) drives the first screw rod (11) and the second motor (14) drives the second screw rod (12) to rotate; the second hanger (2) and the fourth hanger (5) are slidably connected to the first hanger (1) through a slide rail, and at the same time drive the second hanger (2) and the fourth hanger (5) to move horizontally, and adjust the distance between the second hanger (2) and the fourth hanger (5) to adapt to universal joints of different lengths.

4. The assembly system according to claim 3, characterized in that: The second hanger (2) and the fourth hanger (5) have the same structure. The third motor (51), the fourth motor (53) and the third screw rod (52) and the fourth screw rod (54) are symmetrically installed on the fourth hanger (5). The third motor (51) drives the third screw rod (52) and the fourth motor (53) drives the fourth screw rod (54) to rotate, and at the same time drives the third hanger (3) and the fifth hanger (6) to move in the vertical direction, wherein the third hanger (3) is slidably connected to the second hanger (2) through a slide rail.

5. The assembly system according to claim 4, characterized in that: The third hanger (3) and the fifth hanger (6) have the same structure. A fifth motor (61) and a fifth screw rod (62) are installed on the fifth hanger (6). The fifth motor (61) drives the fifth screw rod (62) to rotate, thereby driving the first clamp (4) to move horizontally, wherein the first clamp (4) is slidably connected to the fifth hanger (6) via a slide rail.

6. The assembly system according to claim 5, characterized in that: The first clamp (4) and the second clamp (7) have the same structure. The second clamp (7) comprises a first caliper (75), a second caliper (76), a hydraulic cylinder (74), a second screw group (71), a second screw motor group (72) and a connecting frame (73). The first caliper (75), the second caliper (76) and the hydraulic cylinder (74) are arranged on the connecting frame (73). The first caliper (75) and the second caliper (76) are opened and closed by the extension and retraction of the hydraulic cylinder (74). The second screw group (71) and the second screw motor group (72) for driving the screw are installed on the first caliper (75) and / or the second caliper (76). The screw is driven by the motor to move in a horizontal direction to adjust the position of the universal joint flange.

7. The assembly system according to claim 6, characterized in that: A movable caliper group (77) is also installed on the first caliper (75) and / or the second caliper (76) for fixing the universal joint shaft.

8. The assembly system according to claim 7, characterized in that: The six screw heads of the second screw group (71) are installed with rubber heads (78).

9. The assembly system according to claim 7, characterized in that: The movable caliper set (77) is connected to the corresponding caliper via a ball hinge.

10. The assembly system according to any one of claims 2 to 9, characterized in that: The first hanger (1) is provided with a through hole (15).

Images