Octagonal tube main shaft casting connecting piece for photovoltaic support multi-point transmission

Abstract

The utility model provides a kind of octagonal tube main shaft casting connecting piece for photovoltaic support multipoint transmission, for connecting two octagonal tube main shafts, including the upper hoop and lower hoop cast into shape, the upper hoop and lower hoop all include hoop main body and the installation wing plate of being located in the both sides of hoop main body, and two installation wing plates are formed by the both sides of hoop main body extending outward.This utility model optimizes main shaft section into regular octagon (the distance of opposite side is D), and the upper hoop and lower hoop shape is close to half octagon, and is divided into hoop main body and installation wing plate, and hoop main body is half regular octagon on the basis of lengthening oblique side, to form four inclined surface synchronous meshing structure.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic bracket technology, specifically to an octagonal tube spindle casting connector for multi-point transmission of photovoltaic brackets. Background Technology

[0002] As photovoltaic tracking brackets develop towards larger spans and higher precision, the mechanical performance of the spindle connectors has become a core factor affecting system reliability. In existing technologies, multi-point transmission systems commonly employ a U-shaped clamp structure, using double-sided bolts for locking the spindle connection. However, this design suffers from insufficient contact surface leading to deteriorated torsional resistance. Traditional clamps, limited by installation methods, require a lateral installation gap (typically 0.5-3mm) between the spindle and the connector, resulting in contact only on the top and bottom surfaces. The horizontal gap prevents effective constraint, and this non-full circumferential contact reduces torque transmission efficiency. Under dynamic wind load conditions, this can easily cause circumferential slippage of the spindle, leading to synchronization deviations in the photovoltaic module array.

[0003] In view of this, the person in charge of the utility model in this case conducted in-depth research on the above-mentioned issues, which led to the creation of this case. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned shortcomings by providing an octagonal tube spindle casting connector for multi-point transmission of photovoltaic brackets, which can effectively ensure the coaxiality of the two spindles and has good connection stability.

[0005] The solution adopted by this utility model to solve the technical problem is: an octagonal tube main shaft casting connector for multi-point transmission of photovoltaic brackets, used to connect two octagonal tube main shafts, including an upper clamp and a lower clamp formed by casting, wherein the upper clamp and the lower clamp each include a clamp body adapted to the profile of the main shaft and mounting wing plates provided on both sides of the clamp body, and the two mounting wing plates are formed by extending outward from both sides of the clamp body;

[0006] The clamp body includes a planar section, inclined sections extending from both ends of the planar section, and a side plane extending vertically from the inclined sections. The inclined sections of the upper and lower clamps are fitted to the inclined surfaces of the octagonal tube spindles to ensure the coaxiality of the two octagonal tube spindles. The distance between the planar sections of the upper and lower clamps is greater than the diameter of the octagonal tube spindles to prevent over-constraint installation of the octagonal tube spindles.

[0007] Furthermore, to ensure that the inclined surface of the clamp body fits snugly against the inclined surface of the octagonal tube spindle, the distance between opposite sides of the octagonal tube spindle is D, the length of the inclined side of the octagonal tube spindle is L1, the length of the inclined surface segment of the clamp body is L2, and the difference between the length of the inclined side of the octagonal tube spindle and the length of the inclined surface segment of the clamp body is L2-L1=0.02D.

[0008] Furthermore, in order to tightly connect the two octagonal tube spindles by means of an upper clamp and a lower clamp, the upper clamp and the lower clamp are fixedly installed on the octagonal tube spindle by means of long bolts and nuts, and the two ends of the upper clamp are fixedly connected to the two ends of the lower clamp by means of bolts and nuts, thereby tightly installing on the octagonal tube spindle.

[0009] Furthermore, in order to install long bolts and bolts, the clamp body is provided with a number of first bolt holes for the long bolts to pass through, and the mounting wing plate is provided with a number of second bolt holes for the bolts to pass through.

[0010] Furthermore, to ensure the bolt tightening force, the first bolt hole is located on the planar section, and the mounting wing plate extends outward from the side plane.

[0011] Furthermore, to ensure that the bolt installation position is adjustable, the first bolt hole is a round hole or a strip hole extending along the length direction of the upper and lower clamps, and the second bolt hole is a strip hole or a round hole extending perpendicular to the length direction of the upper or lower clamps.

[0012] Furthermore, in order to improve the structural strength of the upper and lower clamps, the upper and lower clamps are provided with a number of long reinforcing ribs covering the clamp body and the mounting wing plate, and a number of short reinforcing ribs located at the connection between the clamp body and the mounting wing plate, wherein the short reinforcing ribs are located between two adjacent long reinforcing ribs.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] (1) This utility model optimizes the main shaft cross-section into a regular octagon (with a side-to-side distance of D). Compared to the square tube main shaft, the octagonal tube main shaft has a cross-section closer to a circle, resulting in higher torsional strength with the same material usage. The inclined side of the inner cavity of the connector is extended by ΔL = 3mm (ΔL = 0.02D). The upper and lower clamps are close to half an octagon in shape, consisting of a clamp body and a mounting wing plate. The clamp body is obtained by extending the inclined side length based on half a regular octagon, thus forming a four-inclined synchronous meshing structure. This configuration changes the contact surface from the opposite two sides of the traditional structure. The number of contact surfaces has been increased from 2 to 4, increasing the contact area between the spindle connector and the spindle. This significantly improves the torque transmission efficiency and synchronization accuracy of the spindle, reduces angular deviation, and the four-way contact mode can also effectively suppress circumferential slippage and reduce the synchronization deviation of the spindle. The clamp body has 4 slots for long bolts to pass through both spindle connectors and the spindle at the same time, so that the spindle connector and the spindle are in close contact on the four-way surface. The longitudinal slots facilitate the adjustment of the spindle position. The mounting wing plate has 8 round holes for bolt locking.

[0015] (2) This utility model can use an integrated casting molding process to realize the seamless integral molding of the connector, simplify the process, reduce the process complexity, improve production efficiency, improve the strength of the finished product and the material utilization rate, improve the mechanical properties of the main shaft connector, and pre-set 3 large reinforcing ribs that penetrate the clamp part and the wing plate part and 4 small reinforcing ribs that connect the wing plate and the clamp slope (rib height h = 4mm, rib thickness t = 5mm) between the upper surface of the connector and the wing plate. The layout of the reinforcing ribs is optimized through finite element simulation. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is the front view of the present invention;

[0019] Figure 3 This is an installation structure diagram of the present invention.

[0020] In the diagram: 1. Octagonal tube spindle; 2. Upper clamp; 3. Lower clamp; 4. Long bolt; 5. Bolt; 6. Clamp body; 61. First bolt hole; 62. Planar section; 63. Inclined section; 64. Side plane; 7. Mounting wing plate; 71. Second bolt hole; 8. Long reinforcing rib; 9. Short reinforcing rib. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0022] Example: Figure 1-3 As shown, this embodiment provides an octagonal tube spindle casting connector for multi-point transmission of photovoltaic brackets, used to connect two octagonal tube spindles 1. It includes an upper clamp 2 and a lower clamp 3 formed by casting. The upper clamp 2 and the lower clamp 3 each include a clamp body 6 adapted to the profile of the spindle and mounting wing plates 7 provided on both sides of the clamp body 6. The two mounting wing plates 7 are formed by extending outward from both sides of the clamp body 6.

[0023] The clamp body 6 includes a planar section 62, an inclined section 63 extending obliquely from both ends of the planar section 62, and a side plane 64 extending vertically from the inclined section 63. The inclined sections 63 of the upper clamp 2 and the lower clamp 3 are fitted with the inclined surfaces of the octagonal tube spindle 1 to ensure the coaxiality of the two octagonal tube spindles 1. The distance between the planar section 62 of the upper clamp 2 and the planar section 62 of the lower clamp 3 is greater than the diameter of the octagonal tube spindle 1 to prevent over-constraint installation of the octagonal tube spindle 1.

[0024] In this embodiment, to ensure that the inclined surface of the clamp body 6 fits against the inclined surface of the octagonal tube spindle 1, the distance between opposite sides of the octagonal tube spindle 1 is D, the length of the inclined side of the octagonal tube spindle 1 is L1, the length of the inclined surface segment 63 of the clamp body 6 is L2, and the difference between the length of the inclined side of the octagonal tube spindle 1 and the length of the inclined surface segment 63 of the clamp body 6 is L2-L1=0.02D.

[0025] In this embodiment, in order to tightly connect two octagonal tube spindles 1 by means of upper clamp 2 and lower clamp 3, the upper clamp 2 and lower clamp 3 are fixedly installed on the octagonal tube spindle 1 by means of long bolts 4 and nuts, and the two ends of the upper clamp 2 are fixedly connected to the two ends of the lower clamp 3 by means of bolts 5 and nuts, thereby tightly installing on the octagonal tube spindle 1.

[0026] In this embodiment, in order to install the long bolt 4 and the bolt 5, the clamp body 6 is provided with a plurality of first bolt holes 61 for the long bolt 4 to pass through, and the mounting wing plate 7 is provided with a plurality of second bolt holes 71 for the bolt 5 to pass through.

[0027] In this embodiment, in order to ensure the locking force of bolt 5, the first bolt hole 61 is provided on the planar section 62, and the mounting wing plate 7 extends outward from the side plane 64.

[0028] In this embodiment, to ensure that the installation position of bolt 5 is adjustable, the first bolt hole 61 is a strip hole or a round hole extending along the length direction of the upper clamp 2 and the lower clamp 3, and the second bolt hole 71 is a round hole or a strip hole extending perpendicular to the length direction of the upper clamp 2 or the lower clamp 3.

[0029] In this embodiment, to improve the structural strength of the upper clamp 2 and the lower clamp 3, the upper clamp 2 and the lower clamp 3 are provided with a plurality of long reinforcing ribs 8 covering the clamp body 6 and the mounting wing plate 7 and a plurality of short reinforcing ribs 9 located at the connection between the clamp body 6 and the mounting wing plate 7. The short reinforcing ribs 9 are located between two adjacent long reinforcing ribs 8, and the second bolt hole 71 is located between adjacent long reinforcing ribs 8 and short reinforcing ribs 9, so as to improve the structural strength at the opening of the mounting wing plate 7 and ensure uniform stress distribution.

[0030] This invention optimizes the main shaft cross-section into a regular octagon (with a side-to-side distance of D). Compared to a square tube main shaft, the octagonal tube main shaft 1 has a cross-section closer to a circle, resulting in higher torsional strength with the same material usage. The inclined side of the connecting part's inner cavity is extended by ΔL = 3mm (ΔL = 0.02D). The upper clamp 2 and lower clamp 3 are nearly half an octagon in shape, consisting of a clamp body 6 and a mounting wing plate 7. The clamp body 6 is obtained by extending the inclined side length based on a half regular octagon, thus forming a four-inclined-surface synchronous meshing structure. This configuration changes the contact surface from the opposite sides of the traditional structure. The number of contact surfaces is increased from 2 to 4, which significantly increases the contact area between the spindle connector and the spindle, effectively improving the torque transmission efficiency and synchronization accuracy of the spindle, reducing angular deviation, and the four-way contact mode can also effectively suppress circumferential slippage and reduce the synchronization deviation of the spindle. The clamp body 6 has 4 slots for the long bolts 4 to pass through the two spindle connectors and the spindle at the same time, so that the spindle connector and the spindle have a tight four-way contact. The longitudinal slots facilitate the adjustment of the spindle position. The mounting wing plate 7 has 8 round holes for the bolts 5 to lock.

[0031] This utility model can use an integrated casting process to achieve seamless integral molding of the connector, simplifying the process, reducing process complexity, improving production efficiency, increasing the strength of the finished product and the material utilization rate, and improving the mechanical properties of the main shaft connector. Three large reinforcing ribs penetrating the clamp and the wing plate and four small reinforcing ribs connecting the wing plate 7 and the clamp slope are pre-placed on the upper surface of the connector and between them. The layout of the reinforcing ribs is optimized through finite element simulation.

[0032] The above description is merely an embodiment of this utility model and does not limit the scope of patent protection of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this utility model.

Claims

1. An octagonal tube spindle casting connector for multi-point transmission in photovoltaic brackets, used to connect two octagonal tube spindles, characterized in that: It includes an upper clamp and a lower clamp formed by casting. The upper clamp and the lower clamp each include a clamp body adapted to the profile of the main shaft and mounting wing plates provided on both sides of the clamp body. The two mounting wing plates are formed by extending outward from both sides of the clamp body. The clamp body includes a planar section, inclined sections extending from both ends of the planar section, and a side plane extending vertically from the inclined sections. The inclined sections of the upper and lower clamps are fitted to the inclined surfaces of the octagonal tube spindles to ensure the coaxiality of the two octagonal tube spindles. The distance between the planar sections of the upper and lower clamps is greater than the diameter of the octagonal tube spindles to prevent over-constraint installation of the octagonal tube spindles.

2. The octagonal tube spindle casting connector for multi-point transmission of photovoltaic brackets according to claim 1, characterized in that: The distance between opposite sides of the octagonal tube spindle is D, the length of the hypotenuse of the octagonal tube spindle is L1, the length of the inclined section of the clamp body is L2, and the difference between the length of the hypotenuse of the octagonal tube spindle and the length of the inclined section of the clamp body is L2-L1=0.02D.

3. The octagonal tube spindle casting connector for multi-point transmission of photovoltaic brackets according to claim 1, characterized in that: The upper clamp and the lower clamp are fixedly installed on the octagonal tube spindle by long bolts and nuts, and the two ends of the upper clamp are fixedly connected to the two ends of the lower clamp by bolts and nuts, thus tightly clamping and installing on the octagonal tube spindle.

4. The octagonal tube spindle casting connector for multi-point transmission of photovoltaic brackets according to claim 3, characterized in that: The clamp body has several first bolt holes for long bolts to pass through, and the mounting wing plate has several second bolt holes for bolts to pass through.

5. The octagonal tube spindle casting connector for multi-point transmission of photovoltaic brackets according to claim 4, characterized in that: The first bolt hole is located on the planar section, and the mounting wing plate extends outward from the side plane.

6. The octagonal tube spindle casting connector for multi-point transmission of photovoltaic brackets according to claim 4, characterized in that: The first bolt hole is a round hole or a strip hole extending along the length direction of the upper and lower clamps, and the second bolt hole is a strip hole or a round hole extending perpendicular to the length direction of the upper or lower clamps.

7. The octagonal tube spindle casting connector for multi-point transmission of photovoltaic brackets according to claim 1, characterized in that: The upper and lower clamps are provided with a number of long reinforcing ribs covering the clamp body and the mounting wing plate, and a number of short reinforcing ribs located at the connection between the clamp body and the mounting wing plate. The short reinforcing ribs are located between two adjacent long reinforcing ribs.

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