Photovoltaic frame mounting assembly

Abstract

The utility model relates to a photovoltaic frame mounting assembly, which comprises a photovoltaic pressing block, at least one first connecting part and at least one second connecting part, and is characterized in that the photovoltaic pressing block comprises a first supporting plate and a second supporting plate which are oppositely arranged along a first direction, and the second supporting plate is positioned between the first supporting plate and a mounting beam; the fastener penetrates through the first supporting plate and the second supporting plate and is fixedly connected with a connecting piece on the mounting beam, the first supporting plate and the second supporting plate are connected with a first connecting part extending in the first direction, the side, away from the mounting beam, of the first connecting part is connected with a second connecting part extending in the second direction, and the second connecting part is fixedly connected with the first supporting plate and the second supporting plate in the second direction. The second connecting part is located on one side of the first connecting part, the first supporting plate and the second supporting plate are located on the other side, and the second connecting part is in contact connection with the photovoltaic frame and applies pressure to the photovoltaic frame. According to the photovoltaic pressing block, the second supporting plate is arranged, fixing points between the photovoltaic pressing block and the mounting beam are increased, the photovoltaic pressing block is not prone to torsion slippage, and meanwhile the structural strength of the photovoltaic pressing block is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of photovoltaic power generation, and in particular to a photovoltaic frame mounting assembly. Background Art

[0002] With the rapid development of the new energy industry and the deepening of research on the use of solar energy, photovoltaic power generation technology has been widely used in production and life. When installing photovoltaic panels, photovoltaic frames are usually set on the edges of photovoltaic panels for positioning and protection, and then the photovoltaic frames are fixed to the mounting beams through photovoltaic frame installation components to ensure that the photovoltaic panels are stably installed on the mounting beams. When subjected to wind loads and snow pressure, photovoltaic panels are prone to deformation, which causes the photovoltaic pressure blocks in the photovoltaic frame installation components to be stressed and rotate relative to the mounting beams, resulting in loose installation of the photovoltaic frame, and even slippage between the photovoltaic panel and the photovoltaic frame, which in turn affects the installation and normal operation of the photovoltaic panel. Therefore, it is of great significance to improve the installation stability and structural strength of the photovoltaic frame installation components. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present disclosure aims to provide a photovoltaic frame mounting assembly.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] The present disclosure provides a photovoltaic frame installation assembly for installing a photovoltaic frame on a mounting beam, wherein the photovoltaic frame installation assembly includes a photovoltaic pressing block;

[0006] The photovoltaic pressing block comprises a first support plate and a second support plate, the first support plate and the second support plate are arranged opposite to each other along a first direction, the second support plate is arranged between the first support plate and the mounting beam, the first direction is the height direction of the photovoltaic frame, the photovoltaic pressing block is fixed to the mounting beam by a fastener, the fastener passes through the first support plate and the second support plate in sequence, and is fastened to a connecting piece arranged on the mounting beam;

[0007] The photovoltaic pressing block also includes at least one first connecting part and at least one second connecting part, the first supporting plate and the second supporting plate are respectively connected to the first connecting part, the first connecting part extends along the first direction, the side of the first connecting part away from the mounting beam is connected to the second connecting part, the second connecting part extends along the second direction, the second direction is the width direction of the photovoltaic frame, along the second direction, the second connecting part is located on one side of the first connecting part, the first supporting plate and the second supporting plate are located on the other side of the first connecting part, the second connecting part is in contact with and connected to the photovoltaic frame and applies pressure to the photovoltaic frame so that the photovoltaic frame is fixed on the mounting beam.

[0008] In a possible implementation manner, the first support plate is parallel to the second support plate, and the first connecting portion is perpendicular to the first support plate.

[0009] In a possible implementation manner, a thickness of the first support plate is greater than a thickness of the second support plate.

[0010] In a possible embodiment, the photovoltaic frame mounting assembly includes two first connecting parts and two second connecting parts, and along the first direction, the sides of the two first connecting parts away from the second connecting parts are connected through the first support plate and the second support plate, and the two second connecting parts are symmetrically arranged relative to a plane parallel to the first connecting part and passing through the geometric center of the first support plate.

[0011] In a possible implementation manner, the number of the photovoltaic frames is two, each of the photovoltaic frames is respectively disposed on a cushion block, and each of the second connecting portions abuts against one of the photovoltaic frames;

[0012] The photovoltaic pressing block also includes two third connecting parts, each of which is connected to one of the first connecting parts. Along the first direction, the third connecting part is arranged on a side of the first connecting part away from the second connecting part, and the side of the third connecting part away from the second connecting part is clamped with the cushion block.

[0013] In a possible embodiment, the photovoltaic frame mounting assembly includes a first connecting part and a second connecting part, and the photovoltaic frame mounting assembly also includes a fourth connecting part and a supporting part, the first supporting plate and the second supporting plate are respectively connected to the fourth connecting part, and along the first direction, the side of the fourth connecting part away from the first supporting plate and the second supporting plate is connected to the supporting part, and the supporting part abuts against the mounting beam.

[0014] In a possible implementation manner, the number of the photovoltaic frame is one, the photovoltaic frame is arranged on a cushion block, and the second connecting portion abuts against the photovoltaic frame;

[0015] The photovoltaic pressing block also includes a third connecting part, which is connected to the first connecting part. Along the first direction, the third connecting part is arranged on a side of the first connecting part away from the second connecting part, and the side of the third connecting part away from the second connecting part is clamped with the cushion block.

[0016] In a possible implementation manner, the cushion block includes a first mounting portion and a second mounting portion, and along the second direction, the second mounting portion is arranged on a side of the first mounting portion away from the photovoltaic pressing block;

[0017] Along the first direction, one side of the first mounting portion abuts against the mounting beam, and the other side of the first mounting portion is provided with a slot matched with the third connecting portion.

[0018] In a possible embodiment, the first connecting portion and the third connecting portion abut against the first surface of the photovoltaic frame, the second connecting portion abuts against the second surface of the photovoltaic frame, the first mounting portion abuts against the third surface of the photovoltaic frame, the second mounting portion abuts against the fourth surface of the photovoltaic frame, the first surface and the third surface are arranged opposite to each other, and the second surface and the fourth surface are arranged opposite to each other.

[0019] In a possible implementation manner, both the first mounting portion and the second mounting portion are provided with weight-reducing grooves.

[0020] The advantages of the present disclosure are as follows: the second support plate is provided in the present disclosure, which increases the fixing points between the photovoltaic pressing block and the mounting beam, making it difficult for the photovoltaic pressing block to torsionally slip, while improving the structural strength of the photovoltaic pressing block.

[0021] Other features and advantages of the present disclosure will be set forth in the subsequent description, and in part will become apparent from the description, or may be understood through implementation of the present application. The objects and other advantages of the present application may be realized and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the present disclosure and are used together with the description to explain the principles of the present disclosure. In these drawings, similar reference numerals are used to identify similar elements. The drawings described below are some embodiments of the present disclosure, rather than all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic structural diagram of a photovoltaic frame mounting assembly according to an exemplary embodiment.

[0024] Figure 2 is a front view of a photovoltaic frame mounting assembly according to an exemplary embodiment.

[0025] Figure 3 is a schematic structural diagram of a photovoltaic pressing block according to an exemplary embodiment.

[0026] Figure 4 is a front view of a photovoltaic block according to an exemplary embodiment.

[0027] Figure 5 is a schematic structural diagram of a photovoltaic frame mounting assembly according to another exemplary embodiment.

[0028] Figure 6 is a front view of a photovoltaic frame mounting assembly according to another exemplary embodiment.

[0029] Figure 7 is a schematic structural diagram of a photovoltaic block according to another exemplary embodiment.

[0030] Figure 8 is a front view of a photovoltaic block according to another exemplary embodiment. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure. It should be noted that, in the absence of conflict, the embodiments in this application and the feature vectors in the embodiments can be arbitrarily combined with each other.

[0032] With the rapid development of the new energy industry and the deepening of research on the use of solar energy, photovoltaic power generation technology has been widely used in production and life. When installing photovoltaic panels, photovoltaic frames are usually set on the edges of photovoltaic panels for positioning and protection, and then the photovoltaic frames are fixed to the mounting beams through photovoltaic frame installation components to ensure that the photovoltaic panels are stably installed on the mounting beams. When subjected to wind loads and snow pressure, photovoltaic panels are prone to deformation, which causes the photovoltaic pressure blocks in the photovoltaic frame installation components to be stressed and rotate relative to the mounting beams, resulting in loose installation of the photovoltaic frame, and even slippage between the photovoltaic panel and the photovoltaic frame, which in turn affects the installation and normal operation of the photovoltaic panel. Therefore, it is of great significance to improve the installation stability and structural strength of the photovoltaic frame installation components.

[0033] To solve the above problems, the present disclosure provides a photovoltaic frame mounting assembly, including a photovoltaic block, at least one first connecting part and at least one second connecting part, the photovoltaic block including a first support plate arranged opposite to each other along a first direction and a second support plate located between the first support plate and the mounting beam, a fastener passes through the first support plate and the second support plate and is fastened to a connecting part on the mounting beam, the first support plate and the second support plate are respectively connected to the first connecting part extending along the first direction, a side of the first connecting part away from the mounting beam is connected to the second connecting part extending along the second direction, along the second direction, the second connecting part is located on one side of the first connecting part, the first support plate and the second support plate are located on the other side, and the second connecting part is in contact with and connected to the photovoltaic frame and applies pressure to the photovoltaic frame.

[0034] According to an exemplary embodiment, Figure 1-Figure 8 As shown, the embodiment of the present disclosure provides a photovoltaic frame installation assembly, which is used to install a photovoltaic frame 20 on a mounting beam 50, and the photovoltaic frame 20 is used to fix and install a photovoltaic power generation panel 40. The photovoltaic frame installation assembly includes a photovoltaic pressing block 10, and the photovoltaic pressing block 10 includes a first support plate 11 and a second support plate 12. Along a first direction, the first support plate 11 and the second support plate 12 are arranged opposite to each other, and the second support plate 12 is arranged between the first support plate 11 and the mounting beam 50, wherein the first direction is the height direction of the photovoltaic frame 20 (i.e., Figure 2 , Figure 6 vertical direction shown in ).

[0035] The photovoltaic block 10 also includes at least one first connection part 13 and at least one second connection part 14. When the photovoltaic block 10 includes one first connection part 13 and one second connection part 14, one side of the photovoltaic block 10 is used to fix one photovoltaic frame 20. When the photovoltaic block 10 includes two first connection parts 13 and two second connection parts 14, the photovoltaic block 10 is used to fix two photovoltaic frames 20. One photovoltaic frame 20 is fixed on each side of the photovoltaic block 10 along the second direction. The first support plate 11 and the second support plate 12 are respectively connected to the first connection part 13. The first connection part 13 is used to connect one side of the first support plate 11 and the second support plate 12. The other sides of the first support plate 11 and the second support plate 12 can be connected to each other or connected by other structures. The first connection part 13 extends along the first direction. The side of the first connection part 13 away from the mounting beam 50 is connected to the second connection part 14. The second connection part 14 extends along the second direction, wherein the second direction is the width direction of the photovoltaic frame 20 (i.e. Figure 2 , Figure 6 ), along the second direction, the second connection part 14 is located on one side of the first connection part 13, and the first support plate 11 and the second support plate 12 are located on the other side of the first connection part 13, the second connection part 14 is in contact with and connected to the photovoltaic frame 20 and applies pressure to the photovoltaic frame 20 to fix the photovoltaic frame 20 on the mounting beam 50, and the side of the second connection part 14 close to the photovoltaic frame 20 can be bent toward the photovoltaic frame 20, and a serrated or wavy anti-slip structure can also be provided to increase the tightness of the abutment connection between the second connection part 14 and the photovoltaic frame 20.

[0036] The photovoltaic block 10 is fixed to the mounting beam 50 by a fastener 101, which passes through the first support plate 11 and the second support plate 12 in sequence and is fastened to the connecting piece 51 arranged on the mounting beam 50, so that the photovoltaic block 10 is fixed to the mounting beam 50, and the photovoltaic frame 20 is fixed to the mounting beam 50.

[0037] In the disclosed embodiment, by providing a second support plate, additional fixing points are added between the photovoltaic block and the mounting beam, making the installation of the photovoltaic block more stable and less prone to torsional slippage, while also improving the structural strength of the photovoltaic block.

[0038] In some embodiments, the first support plate 11 is parallel to the second support plate 12 , the first connection portion 13 is perpendicular to the first support plate 11 , and the second connection portion 14 is perpendicular to the first connection portion 13 to adapt to the shape of the photovoltaic frame 20 and improve the structural strength of the photovoltaic block 10 .

[0039] In some embodiments, the thickness of the first support plate 11 is greater than the thickness of the second support plate 12 . Thickening the first support plate 11 can improve the bearing capacity of the photovoltaic block 10 , thereby improving the structural strength.

[0040] In some embodiments, the first support plate 11 is provided with a first mounting hole 111, and the second support plate 12 is provided with a second mounting hole 121 corresponding to the first mounting hole 111. The fastener 101 passes through the first mounting hole 111 and the second mounting hole 121 in sequence, and is fastened to the connecting member 51 provided on the mounting beam 50, wherein the fastener 101 can be a bolt and the connecting member 51 can be a nut.

[0041] In some embodiments, Figure 1-Figure 4 As shown, the photovoltaic frame mounting assembly includes two first connecting parts 13 and two second connecting parts 14. The photovoltaic frame mounting assembly is used to fix two photovoltaic frames 20, and each second connecting part 14 is used to fix one photovoltaic frame 20. Figure 2 ), the side of the two first connection parts 13 away from the second connection part 14 is connected by the first support plate 11 and the second support plate 12, that is, the two sides of the first support plate 11 and the second support plate 12 are respectively connected by a first connection part 13, and the two second connection parts 14 are symmetrically arranged relative to a plane parallel to the first connection part 13 and passing through the geometric center of the first support plate 11. The number of photovoltaic frames 20 is two, and each second connection part 14 abuts against a photovoltaic frame 20. The photovoltaic frame installation assembly also includes two pads 30, and each photovoltaic frame 20 is respectively arranged on a pad 30. The pad 30 is used to fix and position the photovoltaic frame 20, and at the same time plays a certain buffering role to prevent the photovoltaic pressing block 10 and the photovoltaic frame 20 from directly contacting the mounting beam 50 to cause wear. The photovoltaic block 10 also includes two third connection parts 15, each of which is connected to a first connection part 13. Along the first direction, the third connection part 15 is arranged on a side of the first connection part 13 away from the second connection part 14, and the side of the third connection part 15 away from the second connection part 14 is engaged with the cushion block 30 to fix the photovoltaic block 10 and the cushion block 30, thereby improving the fixing effect of the photovoltaic frame 20.

[0042] In some embodiments, Figure 5-Figure 8As shown, the photovoltaic frame mounting assembly includes a first connection portion 13 and a second connection portion 14, and the photovoltaic frame mounting assembly also includes a fourth connection portion 16 and a support portion 17 connected to each other, the first support plate 11 and the second support plate 12 are respectively connected to the fourth connection portion 16, the support portion 17 abuts against the mounting beam 50, and a serrated or wavy anti-slip structure can be provided on the side of the support portion 17 close to the mounting beam 50 to increase the friction between the support portion 17 and the mounting beam 50. Along the first direction, the side of the fourth connection portion 16 away from the first support plate 11 and the second support plate 12 is connected to the support portion 17, the number of photovoltaic frames 20 is one, the photovoltaic frame 20 is arranged on the cushion block 30, and the second connection portion 14 abuts against the photovoltaic frame 20. The photovoltaic pressing block 10 also includes a third connection portion 15, which is connected to the first connection portion 13, and along the first direction (i.e. Figure 6 The third connection portion 15 is arranged on a side of the first connection portion 13 away from the second connection portion 14, and the side of the third connection portion 15 away from the second connection portion 14 is engaged with the cushion block 30 to fix the photovoltaic pressing block 10 and the cushion block 30, thereby improving the fixing effect of the photovoltaic frame 20.

[0043] In some embodiments, the pad 30 includes a first mounting portion 31 and a second mounting portion 32. Figure 2 , Figure 6 As shown, along the second direction (i.e. Figure 2 , Figure 6 The second mounting portion 32 is disposed on a side of the first mounting portion 31 away from the photovoltaic pressing block 10, along the first direction (i.e. Figure 2 , Figure 6 ), one side of the first mounting portion 31 abuts against the mounting beam 50, and the other side of the first mounting portion 31 is provided with a slot 312 that cooperates with the third connecting portion 15. The slot 312 is in close contact with the third connecting portion 15, generating a supporting force on the photovoltaic block 10 toward the photovoltaic frame 20. When the photovoltaic frame mounting assembly includes a first connecting portion 13 and a second connecting portion 14, the supporting force is offset by the friction between the photovoltaic block 10 and the mounting beam 50. When the photovoltaic frame mounting assembly includes two first connecting portions 13 and two second connecting portions 14, the supporting forces on both sides of the photovoltaic block 10 are offset, so that the photovoltaic block 10 is balanced in force and is not prone to slippage and rotation. The material of the pad 30 can be a material with a certain degree of flexibility and elastic deformation, such as resin, silicone, rubber, etc., so as to clamp the photovoltaic frame 20 and play a role in buffering, wear resistance and fixation.

[0044] In some embodiments, the first connecting portion 13 and the third connecting portion 15 abut against the first surface 21 of the photovoltaic frame 20, the second connecting portion 14 abuts against the second surface 22 of the photovoltaic frame 20, the first mounting portion 31 abuts against the third surface 23 of the photovoltaic frame 20, and the second mounting portion 32 abuts against the fourth surface 24 of the photovoltaic frame 20, wherein the first surface 21 and the third surface 23 are arranged opposite to each other, and the second surface 22 and the fourth surface 24 are arranged opposite to each other.

[0045] In some embodiments, the first mounting portion 31 and the second mounting portion 32 are both provided with weight-reducing grooves for reducing the weight of the cushion block 30, thereby reducing the overall weight of the photovoltaic frame mounting assembly. Figure 2 As shown, the first mounting portion 31 is in the shape of a flat plate, and the second mounting portion 32 is oriented toward Figure 1 The photovoltaic frame 20 in the embodiment has an inclined convex shape, the first mounting portion 31 is provided with two first weight-reducing grooves 311, and the second mounting portion 32 is provided with one second weight-reducing groove 321. Of course, it can be understood that the number of the first weight-reducing grooves 311 and the second weight-reducing grooves 321 can be increased or decreased according to actual needs, and the shapes and sizes of the first mounting portion 31, the second mounting portion 32, the first weight-reducing grooves 311 and the second weight-reducing grooves 321 can also be selected according to actual needs, and the embodiments of the present disclosure do not impose too many restrictions on this.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device comprising the elements.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present disclosure rather than to limit it. The present disclosure is described in detail with reference to the preferred embodiments only. Those skilled in the art should understand that the technical solution of the present disclosure can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present disclosure, and should be included in the scope of the claims of the present disclosure.

Claims

1. A photovoltaic frame mounting assembly, characterized in that: Used to install the photovoltaic frame on the mounting beam, the photovoltaic frame mounting assembly includes a photovoltaic pressing block; The photovoltaic pressing block comprises a first support plate and a second support plate, the first support plate and the second support plate are arranged opposite to each other along a first direction, the second support plate is arranged between the first support plate and the mounting beam, the first direction is the height direction of the photovoltaic frame, the photovoltaic pressing block is fixed to the mounting beam by a fastener, the fastener passes through the first support plate and the second support plate in sequence, and is fastened to a connecting piece arranged on the mounting beam; The photovoltaic pressing block also includes at least one first connecting part and at least one second connecting part, the first supporting plate and the second supporting plate are respectively connected to the first connecting part, the first connecting part extends along the first direction, the side of the first connecting part away from the mounting beam is connected to the second connecting part, the second connecting part extends along the second direction, the second direction is the width direction of the photovoltaic frame, along the second direction, the second connecting part is located on one side of the first connecting part, the first supporting plate and the second supporting plate are located on the other side of the first connecting part, the second connecting part is in contact with and connected to the photovoltaic frame and applies pressure to the photovoltaic frame so that the photovoltaic frame is fixed on the mounting beam.

2. The photovoltaic frame mounting assembly according to claim 1, characterized in that: The first support plate is parallel to the second support plate, and the first connecting portion is perpendicular to the first support plate.

3. The photovoltaic frame mounting assembly according to claim 1, characterized in that: The thickness of the first support plate is greater than the thickness of the second support plate.

4. The photovoltaic frame mounting assembly according to claim 2, characterized in that: The photovoltaic frame mounting assembly includes two first connecting parts and two second connecting parts. Along the first direction, the sides of the two first connecting parts away from the second connecting parts are connected through the first supporting plate and the second supporting plate, and the two second connecting parts are symmetrically arranged relative to a plane parallel to the first connecting parts and passing through the geometric center of the first supporting plate.

5. The photovoltaic frame mounting assembly according to claim 4, characterized in that: There are two photovoltaic frames, each of which is disposed on a pad, and each of the second connecting portions abuts against a photovoltaic frame; The photovoltaic pressing block also includes two third connecting parts, each of which is connected to one of the first connecting parts. Along the first direction, the third connecting part is arranged on a side of the first connecting part away from the second connecting part, and the side of the third connecting part away from the second connecting part is clamped with the cushion block.

6. The photovoltaic frame mounting assembly according to claim 1, characterized in that: The photovoltaic frame mounting assembly includes a first connecting part and a second connecting part, and the photovoltaic frame mounting assembly also includes a fourth connecting part and a supporting part. The first supporting plate and the second supporting plate are respectively connected to the fourth connecting part. Along the first direction, the side of the fourth connecting part away from the first supporting plate and the second supporting plate is connected to the supporting part, and the supporting part abuts against the mounting beam.

7. The photovoltaic frame mounting assembly according to claim 6, characterized in that: The number of the photovoltaic frame is one, the photovoltaic frame is arranged on the cushion block, and the second connecting portion abuts against the photovoltaic frame; The photovoltaic pressing block also includes a third connecting part, which is connected to the first connecting part. Along the first direction, the third connecting part is arranged on a side of the first connecting part away from the second connecting part, and the side of the third connecting part away from the second connecting part is clamped with the cushion block.

8. The photovoltaic frame mounting assembly according to claim 5 or 7, characterized in that: The cushion block comprises a first mounting portion and a second mounting portion, and along the second direction, the second mounting portion is arranged on a side of the first mounting portion away from the photovoltaic pressing block; Along the first direction, one side of the first mounting portion abuts against the mounting beam, and the other side of the first mounting portion is provided with a slot matched with the third connecting portion.

9. The photovoltaic frame mounting assembly according to claim 8, characterized in that: The first connecting portion and the third connecting portion abut against the first surface of the photovoltaic frame, the second connecting portion abuts against the second surface of the photovoltaic frame, the first mounting portion abuts against the third surface of the photovoltaic frame, the second mounting portion abuts against the fourth surface of the photovoltaic frame, the first surface and the third surface are arranged opposite to each other, and the second surface and the fourth surface are arranged opposite to each other.

10. The photovoltaic frame mounting assembly according to claim 8, characterized in that: The first mounting portion and the second mounting portion are both provided with weight-reducing grooves.

Images