Main shaft connecting structure for photovoltaic support

Abstract

The utility model relates to the technical field of photovoltaic supports, in particular to a main shaft connecting structure for a photovoltaic support, which comprises a first connecting pipe and a second connecting pipe, the second connecting pipe comprises a contracted pipe section and a non-contracted pipe section which are connected, the contracted pipe section is positioned at one end of the second connecting pipe close to the first connecting pipe, and the non-contracted pipe section is positioned at the other end of the second connecting pipe close to the first connecting pipe. The contracted pipe section can be inserted into the inner periphery of the first connecting pipe, a guide head is arranged at the end, close to the first connecting pipe, of the contracted pipe section, and a reinforcing groove is formed between the contracted pipe section and the non-contracted pipe section. The first connecting pipe and the contracted pipe section are provided with connecting holes penetrating through the inner wall and the outer wall, the connecting holes in the first connecting pipe and the contracted pipe section are connected through a bolt and nut set or a rivet, and the outline of the guiding head inclines towards the inner periphery of the contracted pipe section. The structural strength is higher; compared with a hoop connection mode, material consumption and material cost are reduced; the installation steps are simplified through the main shaft opposite insertion mode.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic brackets, in particular to a main shaft connection structure for a photovoltaic bracket. Background Art

[0002] In a photovoltaic bracket, as a part running through the whole bracket, the main shaft plays a crucial role. Due to the limitation of production and transportation, the length of the main shaft is much smaller than that of the bracket. Therefore, when installed and used, multiple main shafts need to be spliced to form a complete main shaft. The traditional method is to use two hoop collars to hold together and connect the two main shafts by friction. To ensure the strength of the connection part, both the main shaft and the hoop collars need to be strengthened, resulting in a significant increase in manufacturing cost. There are also problems such as troublesome installation, extrusion deformation of the main shaft, and easy loosening. Summary of the Invention

[0003] The purpose of the utility model is to provide a main shaft connection structure for a photovoltaic bracket, which significantly reduces the materials used, improves the connection strength of the main shaft, and is convenient for construction.

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0005] A main shaft connection structure for a photovoltaic bracket includes a first connection pipe and a second connection pipe. The second connection pipe includes a connected reduced-diameter section and a non-reduced-diameter section. The reduced-diameter section is located at one end of the second connection pipe close to the first connection pipe. The reduced-diameter section can be inserted into the inner circumference of the first connection pipe. A guiding head is arranged at one end of the reduced-diameter section close to the first connection pipe. A strengthening groove is arranged between the reduced-diameter section and the non-reduced-diameter section.

[0006] The first connection pipe and the reduced-diameter section are provided with connection holes penetrating the inner and outer walls, and the connection holes on both are connected by a bolt-nut group or rivets.

[0007] The contour of the guiding head inclines towards the inner circumference of the reduced-diameter section.

[0008] Further, the cross-sections of the first connection pipe and the non-reduced-diameter section are the same. The reduced-diameter section and the non-reduced-diameter section are connected by a transition slope. The strengthening groove successively spans the reduced-diameter section, the transition slope, and the non-reduced-diameter section.

[0009] Further, the outer contour of the guiding head gradually shrinks from the side close to the second connection pipe to the side close to the first connection pipe.

[0010] Further, the cross-sectional shape of the first connection pipe and the non-reduced-diameter section is one of a small-round-corner square pipe, a large-round-corner square pipe, a pentagonal pipe, a hexagonal pipe, an octagonal pipe, and an octagonal pipe with a pressed edge.

[0011] Further, the wall thickness range of the first connection pipe and the second connection pipe is: 1.5 mm - 6 mm.

[0012] Furthermore, the bolt-nut group includes a long through-bolt-nut group and a short bolt-nut group.

[0013] The beneficial effects of adopting the technical solution of the present utility model are as follows:

[0014] The main shaft connection structure for a photovoltaic bracket provided by the present utility model can strengthen the main shaft, double the wall thickness at the butt joint, and has higher structural strength; compared with the connection method of using a hoop, it reduces material consumption and material costs; the method of inserting the main shafts simplifies the installation steps, reduces the installation cost, and improves the installation accuracy; after the main shafts are connected, the cross-section only bears torque and does not bear extrusion force, and the stiffness and stability of the main shaft are better; the design of the guiding head makes it easier for the reduced pipe section to be inserted into the first connecting pipe, improving the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 It is Figure 1 an enlarged schematic diagram at position A in

[0018] Figure 3 It is Figure 1 an enlarged schematic diagram at position B in

[0019] Figure 4 It is a sectional structural schematic diagram of the present utility model;

[0020] Figure 5 It is Figure 4 an enlarged schematic diagram at position C in

[0021] Figure 6 It is a sectional schematic diagram of the first connecting pipe in the present utility model;

[0022] Figure 7 It is a schematic diagram of the present utility model connected by a bolt-nut group Figure 1 ;

[0023] Figure 8 It is a schematic diagram of the present utility model connected by a bolt-nut group Figure 2 ;

[0024] Figure 9 It is a schematic diagram of the present utility model connected by rivets.

[0025] Reference numerals in the figure: 1. First connecting pipe; 2. Second connecting pipe; 2a. Reduced pipe section; 2b. Unreduced pipe section; 2c. Guide head; 2d. Reinforcing groove; 2e. Transition slope; 3. Bolt and nut set; 4. Rivet. Specific embodiments

[0026] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] As Figures 1 to 5 shown, a spindle connection structure for a photovoltaic support includes a first connecting pipe 1 and a second connecting pipe 2. The wall thickness range of the first connecting pipe 1 and the second connecting pipe 2 is: 1.5 mm to 6 mm. The second connecting pipe 2 includes a connected reduced pipe section 2a and an unreduced pipe section 2b. The reduced pipe section 2a is formed by necking with a special mold using a steel pipe necking machine, which can maintain the coaxiality between the unreduced pipe section 2b and the reduced pipe section 2a, with high accuracy and no cracks, bending and other phenomena. The reduced pipe section 2a is located at one end of the second connecting pipe 2 near the first connecting pipe 1, and the reduced pipe section 2a can be inserted into the inner circumference of the first connecting pipe 1 to realize the connection and extension of the spindle.

[0028] A guide head 2c is provided at one end of the reduced pipe section 2a near the first connecting pipe 1. The contour of the guide head 2c inclines towards the inner circumference of the reduced pipe section 2a, and the outer contour of the guide head 2c gradually shrinks from the side near the second connecting pipe 2 to the side near the first connecting pipe 1, making it easy for the reduced pipe section 2a to be inserted into the inner circumference of the first connecting pipe 1.

[0029] The reduced pipe section 2a and the unreduced pipe section 2b are connected by a transition slope 2e. The transition slope 2e part connecting the reduced pipe section 2a and the unreduced pipe section 2b is deformed due to extrusion, the fatigue strength is reduced, and the performance changes, which will cause stress concentration and fatigue failure during actual use. Therefore, reinforcing grooves 2d are designed on each side of the connection part between the reduced pipe section 2a and the unreduced pipe section 2b. The reinforcing grooves 2d successively span the reduced pipe section 2a, the transition slope 2e and the unreduced pipe section 2b, so as to disperse stress, improve the structural strength and the anti-bending performance.

[0030] Specifically as Figure 6 shown, the cross-sectional shapes of the first connecting pipe 1 and the unreduced pipe section 2b are one of a small round-corner square pipe, a large round-corner square pipe, a pentagonal pipe, a hexagonal pipe, an octagonal pipe and an octagonal flanged pipe, and the cross-sections of the first connecting pipe 1 and the unreduced pipe section 2b are the same.

[0031] With reference to Figure 1 、 Figures 7 to 9, both the first connecting pipe 1 and the reduced pipe section 2a are provided with connection holes penetrating their inner and outer walls, and the connection holes on the first connecting pipe 1 and the reduced pipe section 2a are connected by a bolt-nut group 3 or a rivet 4. The bolt-nut group 3 includes a long through-bolt-nut group and a short bolt-nut group. Specifically, as Figure 7 shown, when connecting with the short bolt-nut group, large holes are opened at relative positions on the first connecting pipe 1 and the reduced pipe section 2a for the bolts and tools to pass through. After the connection is completed, one short bolt-nut group clamps the two-layer pipe wall therein; specifically, as Figure 8 shown, when connecting with the long through-bolt-nut group, one long through-bolt-nut group clamps the four-layer pipe wall therein, and the connection is firm. Specifically, as Figure 9 shown, when connecting with the rivet 4, one rivet 4 connects the two-layer pipe wall; in addition, some of the connection holes may not be connected with the bolt-nut group 3 or the rivet 4 and are left vacant for threading and wire routing in the main shaft later.

[0032] Based on the embodiments of the present invention as an inspiration, through the above description, those skilled in the art can make various changes and modifications completely within the scope not deviating from the technical idea of the present invention. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present invention shall be included within the protection scope of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A main shaft connection structure for a photovoltaic support, characterized in that: It includes a first connecting pipe (1) and a second connecting pipe (2). The second connecting pipe (2) includes a connected reduced-diameter section (2a) and a non-reduced-diameter section (2b). The reduced-diameter section (2a) is located at one end of the second connecting pipe (2) close to the first connecting pipe (1). The reduced-diameter section (2a) can be inserted into the inner circumference of the first connecting pipe (1). A guiding head (2c) is provided at one end of the reduced-diameter section (2a) close to the first connecting pipe (1). A strengthening groove (2d) is provided between the reduced-diameter section (2a) and the non-reduced-diameter section (2b). The first connecting pipe (1) and the reduced-diameter section (2a) are provided with connecting holes penetrating through the inner and outer walls, and the connecting holes on both are connected by a bolt-nut group (3) or rivets (4). The contour of the guiding head (2c) inclines towards the inner circumference of the reduced-diameter section (2a).

2. The spindle connection structure for a photovoltaic support according to claim 1, characterized in that: The cross-sections of the first connecting pipe (1) and the non-reduced-diameter section (2b) are the same. The reduced-diameter section (2a) and the non-reduced-diameter section (2b) are connected by a transition slope (2e). The strengthening groove (2d) sequentially straddles the reduced-diameter section (2a), the transition slope (2e), and the non-reduced-diameter section (2b).

3. The spindle connection structure for a photovoltaic support according to claim 1, wherein: The outer contour of the guiding head (2c) gradually shrinks from the side close to the second connecting pipe (2) to the side close to the first connecting pipe (1).

4. A main shaft connection structure for a photovoltaic support according to claim 2, characterized in that: The cross-sectional shapes of the first connecting pipe (1) and the non-reduced-diameter section (2b) are one of a small-round-corner square pipe, a large-round-corner square pipe, a pentagonal pipe, a hexagonal pipe, an octagonal pipe, and an octagonal flanged pipe.

5. The main shaft connection structure for a photovoltaic support according to claim 3, characterized in that: The wall thickness ranges of the first connecting pipe (1) and the second connecting pipe (2) are: 1.5 mm to 6 mm.

6. The main shaft connection structure for a photovoltaic support according to claim 1, characterized in that: The bolt-nut group (3) includes a long-type through bolt-nut group and a short-type bolt-nut group.

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