Keel structure suitable for multi-angle curtain wall and installation method

Abstract

The keel structure suitable for the multi-angle curtain wall comprises a U-shaped adapter, a T-shaped adapter, a keel, a support and a fastener, one end of the U-shaped adapter is fixedly connected to a main body steel structure, the other end of the U-shaped adapter is connected with the keel through the T-shaped adapter, the side, away from the T-shaped adapter, of the keel is wrapped in the support, and the fastener is arranged on the T-shaped adapter. The T-shaped adapting piece is arranged at the upper end of the keel, the U-shaped adapting piece is arranged at the lower end of the T-shaped adapting piece, the T-shaped adapting piece is arranged at the lower end of the T-shaped adapting piece, the supporting seat can rotate with the keel as the center, the angle of the supporting seat can be adjusted, and a fastener for fixing the keel and the supporting seat into a whole is further arranged at the lower end or the upper end of the supporting seat. A main body steel structure and a curtain wall can be connected only through the U-shaped adapting piece, the T-shaped adapting piece, the keel, the supporting seat and the fastener; installation is convenient and fast, and stability is good; the supports are rotationally adjusted with the keels as the centers, multi-directional adjustment between the supports and the keels is achieved, and the multi-angle installation requirement of the curtain wall is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building curtain wall, and particularly relates to a keel structure suitable for multi-angle curtain wall and a mounting method. BACKGROUND

[0002] In order to meet the increasingly diversified architectural styles, the curtain walls of curved surfaces, twists and non-standard geometrical shapes are emerging in endlessly. This puts forward higher requirements for the keel structure connecting the curtain wall: the keel structure connecting the curtain wall must have multi-angle adjustment capability to ensure the realization of various curtain wall shapes, and at the same time, the efficient construction and stability of the curtain wall also need to be considered.

[0003] However, the traditional fixed keel structure of the curtain wall has obvious limitations in dealing with complex curtain walls due to the standardization of components and the single connection mode: firstly, it is difficult to fit curved surfaces or inclined interfaces, resulting in single curtain wall shape; secondly, it is difficult to install and lacks stability.

[0004] Therefore, the keel structure suitable for multi-angle curtain wall and the mounting method are designed. SUMMARY

[0005] The present application is to overcome the defects in the prior art and provide a keel structure suitable for multi-angle curtain wall and a mounting method.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a keel structure suitable for multi-angle curtain wall, comprising a U-shaped adapter, a T-shaped adapter, a keel, a support and a fastener, one end of the U-shaped adapter is fixedly connected to a main steel structure, the other end of the U-shaped adapter is connected to the keel through the T-shaped adapter, the side of the keel away from the T-shaped adapter is covered in the support, the support can rotate and adjust the angle with the keel as the center, and the lower end or the upper end of the support is further provided with a fastener for fixing the keel and the support as a whole.

[0007] As a preferred scheme of the present application, the keel is a circular pipe, an outward convex sawtooth surface is formed on the outer wall of the side of the keel facing the support, a keel slot opening is formed on the side of the keel facing the T-shaped adapter, and clamping plates are arranged on both sides of the keel slot opening.

[0008] As a preferred scheme of the present application, the U-shaped adapter comprises a mounting plate and a clamping plate symmetrically arranged on the mounting plate, the main steel structure is fixedly arranged between the symmetric clamping plates, and a first long hole connected with the main steel structure is arranged on the clamping plate.

[0009] As a preferred scheme of the present application, the T-shaped adapter comprises a base plate and a plug plate fixed on the base plate, the base plate is provided with a second long hole connected with the mounting plate, the plug plate is inserted into the keel slot, the bolt passes through the clamping plate, the plug plate and is locked by the nut to realize the connection of the T-shaped adapter and the keel.

[0010] As a preferred scheme of the present application, the support is formed with an inner concave sawtooth surface matched with the outer convex sawtooth surface on the inner wall of the side facing the keel, and the support is formed with an arc-shaped clamping opening on both sides.

[0011] As a preferred scheme of the present application, the fastener comprises a first fastener and a second fastener, the inner wall of the first fastener and the second fastener is attached to the outer wall of the side of the keel away from the support, the first fastener is located at the rear end of the keel, and the second fastener is located at the front end of the keel.

[0012] As a preferred scheme of the present application, the first fastener is formed with a first abutting portion on one side, the second fastener is formed with a second abutting portion on the side close to the first fastener, the bolt passes through the second abutting portion, the first abutting portion and is locked by the nut to realize the connection of the second fastener and the first fastener.

[0013] As a preferred scheme of the present application, the first fastener is formed with a first spherical clamping member clamped into the arc-shaped clamping opening at the rear end on the other side, the second fastener is formed with a second spherical clamping member clamped into the arc-shaped clamping opening at the front end on the other side, the screw passes through the arc-shaped clamping opening at the rear end and the first spherical clamping member to realize the connection of the first fastener and the support, and the screw passes through the arc-shaped clamping opening at the front end and the second spherical clamping member to realize the connection of the second fastener and the support.

[0014] As a preferred scheme of the present application, the support is formed with a clamping groove connected with the curtain wall on the side away from the keel.

[0015] A mounting method of a keel structure suitable for a multi-angle curtain wall comprises Step 1: the U-shaped adapter is fixedly connected with the main body steel structure through the clamping plate, the T-shaped adapter adjusts the up-down position of the T-shaped adapter and the U-shaped adapter through the second long hole, and after the adjustment is completed, the T-shaped adapter and the U-shaped adapter are fixedly connected through the bolt and the nut; Step 2: the plug plate of the T-shaped adapter is inserted into the keel slot of the keel, the bolt passes through the clamping plate and the plug plate and is locked by the nut to realize the fixed connection of the T-shaped adapter and the keel; Step 3: the support adjusts the angle between the support and the keel and engages the inner concave sawtooth surface of the support with the outer convex sawtooth surface of the keel. Step 4: the first spherical clamping member of the first fastener is clamped into the arc-shaped clamping opening at the rear end of the support, the second spherical clamping member of the second fastener is clamped into the arc-shaped clamping opening at the front end of the support, the bolt passes through the second abutting portion, the first abutting portion and is locked by the nut to realize the connection of the second fastener and the first fastener. Step 5: the screw passes through the rear end arc-shaped notch, the first spherical clamping piece to realize the connection of the first fastener and the support; the screw passes through the front end arc-shaped notch, the second spherical clamping piece to realize the connection of the second fastener and the support.

[0016] The beneficial effects of the present application are: 1. Compared with the traditional keel structure, the main body steel structure and the curtain wall can be connected only by the U-shaped adapter, the T-shaped adapter, the keel, the support and the fastener, which is convenient and fast to install and has good stability; the support is adjusted in rotation around the keel to realize multi-directional adjustment between the support and the keel, and meet the installation requirements of the curtain wall at multiple angles.

[0017] 2. The keel of the present application is a circular pipe, and the cross section of the keel is a straight cross section, which improves the processing efficiency and material utilization rate of the keel compared with the traditional keel with a bevel of a dihedral angle.

[0018] 3. The keel of the present application can adjust its horizontal and vertical positional relationship with the main body steel structure through the T-shaped adapter and the U-shaped adapter, and can be quickly installed on the main body steel structure through bolts and nuts, which reduces the cumbersome steps of back and forth punching and adjustment, improves the installation efficiency, shortens the construction period and reduces the installation cost.

[0019] 4. The angle of the support is adjusted by the tooth engagement between the inner concave serrated surface of the support and the outer convex serrated surface of the keel, and since the keel is a circular pipe, the support is adjusted in rotation around the keel, which increases the range of angle adjustment of the support, and further makes the angle adjustment of the curtain wall more and the curtain wall more diversified.

[0020] 5. The present application can hide the keel behind the curtain wall, reduce the influence on the appearance, and ensure that no supporting structure can be seen from the outside, maintaining the simplicity and smoothness of the curtain wall.

[0021] 6. The present application fully covers the keel by the support and the fastener, and the support and the fastener are connected by the first spherical clamping piece, the rear end arc-shaped notch, the second spherical clamping piece and the front end arc-shaped notch, and are locked by the screw, which effectively ensures the firm installation of the support and adapts to different installation angle requirements.

[0022] 7. The fastener is arranged above and below the U-shaped adapter, the T-shaped adapter, the keel and the support, which reduces the volume occupied by the keel structure, and further, the support can be adjusted along the height direction of the keel, so that the curtain wall located on the keel structure can be more flexibly arranged, increasing the diversity of the curtain wall. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a cross-sectional schematic diagram of the present application at A; Figure 3 This is a cross-sectional view of point B in the present invention; Figure 4 This is a schematic diagram of the structure of the U-shaped adapter of the present invention; Figure 5 This is a structural schematic diagram of the T-type adapter of the present invention; Figure 6 This is a schematic diagram of the keel structure of the present invention; Figure 7 This is a schematic diagram of the structure of the support of the present invention; Figure 8 This is a schematic diagram of the structure of the first fastener of the present invention; The attached figures are labeled as follows: U-shaped adapter 1, T-shaped adapter 2, keel 3, support 4, fastener 5, mounting plate 11, snap-fit ​​plate 12, base plate 21, insert plate 22, convex serrated surface 31, keel groove 32, clamping plate 33, concave serrated surface 41, arc-shaped snap 42, slot 43, first fastener 51, second fastener 52, first elongated hole 121, second elongated hole 211, first abutting part 511, first spherical snap 512, second abutting part 521, second spherical snap 522. Detailed Implementation

[0024] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0025] like Figures 1-8 As shown, a keel structure suitable for multi-angle curtain walls includes a U-shaped adapter 1, a T-shaped adapter 2, a keel 3, a support 4, and a fastener 5. One end of the U-shaped adapter 1 is fixedly connected to the main steel structure, and the other end of the U-shaped adapter 1 is connected to the keel 3 through the T-shaped adapter 2. The side of the keel 3 away from the T-shaped adapter 2 is covered by the support 4. The support 4 can rotate around the keel 3 and adjust the angle. The lower or upper end of the support 4 is also provided with a fastener 5 to fix the keel 3 and the support 4 as one unit.

[0026] Among them, the side of the support 4 away from the keel 3 has a slot 43 for connecting with the curtain wall.

[0027] Specifically, the main steel structure is connected to the curtain wall through U-shaped adapter 1, T-shaped adapter 2, keel 3, support 4, and fastener 5. On the one hand, the main steel structure is connected to the keel 3 through U-shaped adapter 1 and T-shaped adapter 2, and the vertical and horizontal positions of the keel 3 can be adjusted accordingly by adjusting U-shaped adapter 1 and T-shaped adapter 2. On the other hand, the rotation of the support 4 around the keel 3 can adjust the angle of the curtain wall connected to the support 4, ensuring the diversity of the curtain wall. Furthermore, fastener 5 securely connects the angled support 4 and keel 3 to ensure the strength and stability of the keel structure.

[0028] Compared with the traditional keel structure, only by the U-shaped adapter 1, the T-shaped adapter 2, the keel 3, the support 4 and the fastener 5, the connection between the main steel structure and the curtain wall can be realized, which is convenient and fast to install and has good stability; the support 4 is rotatably adjusted around the keel 3, multi-directional adjustment between the support 4 and the keel 3 is realized, and the multi-angle installation requirement of the curtain wall is met.

[0029] The fastener 5, the U-shaped adapter 1, the T-shaped adapter 2, the keel 3 and the support 4 are arranged in an up-down staggered manner, the volume occupied by the keel structure is reduced, further, the support 4 can be adjusted along the height direction of the keel 3, so that the curtain wall located on the keel structure can be more flexibly arranged, and the diversity of the curtain wall is increased.

[0030] The keel 3 is a circular pipe, an outward convex sawtooth surface 31 is formed on the outer wall of the side of the keel 3 facing the support 4, a keel slot 32 for the T-shaped adapter 2 to enter is formed on the side of the keel 3 facing the T-shaped adapter 2, and clamping plates 33 are arranged on the two sides of the keel slot 32.

[0031] The U-shaped adapter 1 comprises a mounting plate 11 and a clamping plate 12 symmetrically arranged on the mounting plate 11, the main steel structure is fixedly arranged between the symmetric clamping plates 12, and a first long hole 121 connected with the main steel structure is arranged on the clamping plate 12.

[0032] The T-shaped adapter 2 comprises a bottom plate 21 and a plug-in plate 22 fixedly arranged on the bottom plate 21, a second long hole 211 connected with the mounting plate 11 is arranged on the bottom plate 21, the plug-in plate 22 is inserted into the keel slot 32, a bolt passes through the clamping plates 33 and the plug-in plate 22 and is locked by a nut, and the connection between the T-shaped adapter 2 and the keel 3 is realized.

[0033] Specifically, the U-shaped adapter 1 adjusts the horizontal distance between the U-shaped adapter 1 and the main steel structure through the first long hole 121, and then adjusts the horizontal distance between the curtain wall and the main steel structure; the T-shaped adapter 2 indirectly adjusts the vertical distance between the T-shaped adapter 2 and the main steel structure through the second long hole 211, and then adjusts the vertical distance between the curtain wall and the main steel structure. Further, the plug-in plate 22 of the T-shaped adapter 2 is inserted into the keel slot 32, a bolt passes through the clamping plates 33 of the keel 3 and the plug-in plate 22 of the T-shaped adapter 2 and is locked by a nut, and the fixed connection of the keel 3 on the T-shaped adapter 2 is realized.

[0034] The keel 3 of the application is a circular tube, and the section of the keel 3 is a straight section, which improves the processing efficiency and material utilization of the keel compared with the inclined surface of the traditional keel with a dihedral angle. Meanwhile, the keel 3 can adjust the horizontal and vertical position relationship with the main steel structure through the T-shaped adapter 2 and the U-shaped adapter 1 and is quickly installed on the main steel structure through bolts and nuts, which reduces the cumbersome steps of back and forth punching and adjustment and improves the installation efficiency. This not only shortens the construction period, but also reduces the installation cost.

[0035] The inner wall of the support 4 on the side facing the keel 3 is formed with an inner concave sawtooth surface 41 matched with the outer convex sawtooth surface 31, and the two sides of the support 4 are formed with arc-shaped clamping holes 42.

[0036] The fastener 5 includes a first fastener 51 and a second fastener 52, the inner wall of the first fastener 51 and the second fastener 52 is attached to the outer wall of the side of the keel 3 away from the support 4, the first fastener 51 is located at the rear end of the keel 3, and the second fastener 52 is located at the front end of the keel 3.

[0037] The first fastener 51 is formed with a first abutting portion 511 on one side, the second fastener 52 is formed with a second abutting portion 521 on the side close to the first fastener 51, a bolt passes through the second abutting portion 521 and the first abutting portion 511 and is locked by a nut, and the connection of the second fastener 52 and the first fastener 51 is realized.

[0038] The other side of the first fastener 51 is formed with a first spherical clamping member 512 clamped into the arc-shaped clamping hole 42 at the rear end, and the other side of the second fastener 52 is formed with a second spherical clamping member 522 clamped into the arc-shaped clamping hole 42 at the front end, a screw passes through the arc-shaped clamping hole 42 at the rear end and the first spherical clamping member 512 to realize the connection of the first fastener 51 and the support 4, and a screw passes through the arc-shaped clamping hole 42 at the front end and the second spherical clamping member 522 to realize the connection of the second fastener 52 and the support 4.

[0039] Specifically, the support 4 is rotated around the keel 3 through the tooth matching of the inner concave sawtooth surface 41 at different positions of the inner wall of the support 4 and the outer convex sawtooth surface 31 of the outer wall of the keel 3, and correspondingly, the curtain wall connected with the support 4 through the clamping groove 43 can also be adjusted at multiple angles to ensure the diversity of the curtain wall modeling. Further, the support 4 covers the side of the keel 3 away from the main steel structure, and the fastener 5 covers the side of the keel 3 close to the main steel structure. In order to ensure the stability of the connection between the support 4 and the keel 3, after the first fastener 51 and the second fastener 52 in the fastener 5 are connected by bolts and nuts, the first spherical clamping member 512 of the first fastener 51 is clamped into the arc-shaped clamping hole 42 at the rear end and locked by a screw, the second spherical clamping member 522 of the second fastener 52 is clamped into the arc-shaped clamping hole 42 at the front end and locked by a screw, and the stable fixation of the support 4 and the keel 3 after the angle adjustment is realized.

[0040] The present application adjusts the angle of the support 4 through the tooth engagement of the inner concave serrated surface 41 of the support 4 and the outer convex serrated surface 31 of the keel 3, and since the keel 3 is a circular pipe, the rotation adjustment of the support 4 with the keel 3 as the center increases the range of the angle adjustment of the support 4, and further makes the angle of the curtain wall adjustment more and the curtain wall more diversified.

[0041] The present application can hide the keel 3 behind the curtain wall, reduce the influence on the appearance, and ensure that no supporting structure can be seen from the outside, maintaining the simple and smooth feeling of the curtain wall.

[0042] The present application fully covers the keel 3 through the support 4 and the fastener 5, and the support 4 and the fastener 5 are connected through the first spherical clamping piece 512, the rear end arc-shaped clamping hole 42, the second spherical clamping piece 522, and the front end arc-shaped clamping hole 42, and are locked through screws, effectively ensuring the firm installation of the support 4 and adapting to different installation angle requirements.

[0043] A mounting method of a keel structure suitable for a multi-angle curtain wall, comprising Step 1: The U-shaped adapter 1 is fixedly connected with the main body steel structure through the clamping plate 12, the T-shaped adapter 2 adjusts the up-down position of the T-shaped adapter 2 with the U-shaped adapter 1 through the second long hole 211, and after the adjustment is completed, the T-shaped adapter 2 and the U-shaped adapter 1 are fixedly connected through bolts and nuts; Step 2: The plug plate 22 of the T-shaped adapter 2 is inserted into the keel slot 32 of the keel 3, the bolt passes through the clamping plate 33 and the plug plate 22 and is locked through the nut, and the fixed connection of the T-shaped adapter 2 and the keel 3 is realized; Step 3: The angle between the support 4 and the keel 3 is adjusted, and the inner concave serrated surface 41 of the support 4 is engaged with the outer convex serrated surface 31 of the keel 3; Step 4: The first spherical clamping piece 512 of the first fastener 51 is clamped into the rear end arc-shaped clamping hole 42 of the support 4, the second spherical clamping piece 522 of the second fastener 52 is clamped into the front end arc-shaped clamping hole 42 of the support 4, the bolt passes through the second abutting portion 521 and the first abutting portion 511 and is locked through the nut, and the connection of the second fastener 52 and the first fastener 51 is realized; Step 5: The screw passes through the rear end arc-shaped clamping hole 42 and the first spherical clamping piece 512 to realize the connection of the first fastener 51 and the support 4; the screw passes through the front end arc-shaped clamping hole 42 and the second spherical clamping piece 522 to realize the connection of the second fastener 52 and the support.

[0044] The above description of disclosed embodiments enables one of ordinary skill in the art to make and use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0045] Although the terms U-shaped adapter 1, T-shaped adapter 2, keel 3, support 4, fastener 5, mounting plate 11, clamping plate 12, bottom plate 21, plug plate 22, outer convex serrated surface 31, keel notch 32, clamping plate 33, inner concave serrated surface 41, arc-shaped clamping opening 42, clamping groove 43, first fastener 51, second fastener 52, first long hole 121, second long hole 211, first abutting portion 511, first spherical clamping member 512, second abutting portion 521, second spherical clamping member 522 are used more frequently in the drawings, the possibility of using other terms is not excluded; the use of these terms is only for the convenience of describing and explaining the essence of the application; any kind of additional limitation is contrary to the spirit of the application.

Claims

1. A keel structure suitable for multi-angle curtain wall, characterized in that, The utility model provides a kind of steel structure connecting device, including U-shaped adapter (1), T-shaped adapter (2), keel (3), support (4) and fastener (5), one end of the U-shaped adapter (1) is fixedly connected on main body steel structure, the other end of the U-shaped adapter (1) is connected keel (3) by T-shaped adapter (2), the side of keel (3) away from T-shaped adapter (2) is covered in support (4), the support (4) can rotate with keel (3) as center and adjust angle, the lower end or upper end of the support (4) is further provided with the fastener (5) that keel (3), support (4) are fixed as an organic whole.

2. The runner structure suitable for multi-angle curtain wall according to claim 1, characterized in that, The keel (3) is a circular tube, the outer wall of the side of keel (3) towards support (4) forms outward convex sawtooth surface (31), the side of keel (3) towards T-shaped adapter (2) forms keel slot (32) for facilitating the entry of T-shaped adapter (2), the both sides of keel slot (32) are provided with clamping plate (33).

3. The kind of keel structure that is suitable for multi-angle curtain wall according to claim 2, its characterized in that, The U-shaped adapter (1) includes mounting plate (11) and clamping plate (12) symmetrically arranged on the mounting plate (11), the main body steel structure is fixedly arranged between the symmetric clamping plate (12), the first long hole (121) connected with the main body steel structure is formed in the clamping plate (12).

4. The kind of keel structure suitable for multi-angle curtain wall according to claim 3, characterized in that, The T-shaped adapter (2) includes bottom plate (21) and plug-in plate (22) fixedly arranged on the bottom plate (21), the second long hole (211) connected with the mounting plate (11) is formed in the bottom plate (21), the plug-in plate (22) is inserted into the keel slot (32), the bolt passes through the clamping plate (33) and the plug-in plate (22) and is locked by the nut, to realize the connection of the T-shaped adapter (2) and the keel (3).

5. The kind of keel structure suitable for multi-angle curtain wall according to claim 2, characterized in that, The inner wall of the side of support (4) towards keel (3) forms inward recessed sawtooth surface (41) matched with outward convex sawtooth surface (31), the both sides of support (4) form arc-shaped clamping (42).

6. A batten structure suitable for multi-angle curtain wall according to claim 5, characterized in that, The fastener (5) includes first fastener (51) and second fastener (52), the inner wall of the first fastener (51) and the second fastener (52) is attached to the outer wall of the side of keel (3) away from support (4), the first fastener (51) is located at the rear end of keel (3), and the second fastener (52) is located at the front end of keel (3).

7. A batten structure suitable for multi-angle curtain wall according to claim 6, characterized in that, The side of the first fastener (51) forms first abutment portion (511), the side of the second fastener (52) close to the first fastener (51) forms second abutment portion (521), the bolt passes through the second abutment portion (521) and the first abutment portion (511) and is locked by the nut, to realize the connection of the second fastener (52) and the first fastener (51).

8. The kind of keel structure suitable for multi-angle curtain wall according to claim 7, characterized in that, The other side of the first fastener (51) forms a first spherical clamping member (512) clamped into the arc-shaped clamping hole (42) at the rear end, and the other side of the second fastener (52) forms a second spherical clamping member (522) clamped into the arc-shaped clamping hole (42) at the front end. Screws pass through the arc-shaped clamping hole (42) at the rear end, the first spherical clamping member (512) to realize the connection of the first fastener (51) and the support (4); and screws pass through the arc-shaped clamping hole (42) at the front end, the second spherical clamping member (522) to realize the connection of the second fastener (52) and the support.

9. The kind of keel structure that is suitable for multi-angle curtain wall according to claim 1, its characterized in that, The support (4) is formed with a clamping groove (43) connected with the curtain wall on the side away from the keel (3).

10. A method of installing a keel structure suitable for a multi-angle curtain wall, characterized in that, The keel structure according to any one of claims 1-9 is cited, comprising Step 1: The U-shaped adapter (1) is fixedly connected with the main body steel structure through the clamping plate (12), and the T-shaped adapter (2) is adjusted in the up-down position with the U-shaped adapter (1) through the second long hole (211). After adjustment, the T-shaped adapter (2) and the U-shaped adapter (1) are fixedly connected through bolts and nuts; Step 2: The plug plate (22) of the T-shaped adapter (2) is inserted into the keel slot (32) of the keel (3), the bolt passes through the clamping plate (33) and the plug plate (22) and is locked by the nut, realizing the fixed connection of the T-shaped adapter (2) and the keel (3); Step 3: The support (4) adjusts the angle between the support (4) and the keel (3) and engages the inner concave serrated surface (41) of the support (4) with the outer convex serrated surface (31) of the keel (3); Step 4: The first spherical clamping member (512) of the first fastener (51) is clamped into the rear end arc-shaped clamping hole (42) of the support (4), and the second spherical clamping member (522) of the second fastener (52) is clamped into the front end arc-shaped clamping hole (42) of the support (4). The bolt passes through the second abutting portion (521) and the first abutting portion (511) and is locked by the nut, realizing the connection of the second fastener (52) and the first fastener (51); Step 5: The screw passes through the rear end arc-shaped clamping hole (42) and the first spherical clamping member (512) to realize the connection of the first fastener (51) and the support (4); and the screw passes through the front end arc-shaped clamping hole (42) and the second spherical clamping member (522) to realize the connection of the second fastener (52) and the support (4).

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