Universal joint and photovoltaic support with same

Abstract

The utility model discloses a universal joint and a photovoltaic support with the same. A universal joint belongs to the technical field of photovoltaic supports and comprises an input connector and an output connector, the input connector is provided with an input jack, the output connector is fixedly connected with the input connector, the output connector is provided with a bolt hole, the axis of the bolt hole is perpendicular to the axis of the input jack, and the bolt hole is suitable for being movably connected with a bolt inserted into the bolt hole. Therefore, the axis of the bolt can swing within the preset angle relative to the axis of the bolt hole, the variable-angle power transmission function can be achieved, the structure of the universal joint is simple, and the production cost can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic support technical field, specifically, it relates to a universal joint and photovoltaic support with it. BACKGROUND

[0002] The universal joint is a part similar to human joint, which allows the included angle between the connected parts to change within a certain range, and is usually used to realize variable angle power transmission.

[0003] In the related art, the universal joint includes two universal joints and an intermediate shaft, the center of the intermediate shaft is at the intersection of the rotation axes of the two universal joints, so that the intermediate shaft can realize the conversion of the rotation direction, so that the two universal joints can rotate relative to each other, and variable angle power transmission can be realized, but the structure of the universal joint is relatively complex, which increases the production cost. SUMMARY

[0004] The utility model aims at at least one of the above technical problems in the prior art. To this end, the utility model provides a universal joint, which can realize variable angle power transmission and has a simple structure, thereby reducing the production cost.

[0005] The utility model further provides a photovoltaic support with the universal joint.

[0006] According to the universal joint of the utility model embodiment, the input connector has an input socket, the output connector is fixedly connected with the input connector, the output connector has a bolt hole, the axis of the bolt hole is perpendicular to the axis of the input socket, and the bolt hole is suitable for being movably connected with the bolt inserted therein, so that the axis of the bolt can swing within a preset angle relative to the axis of the bolt hole.

[0007] According to the universal joint of the utility model embodiment, the bolt hole is suitable for being movably connected with the bolt inserted therein, so that the axis of the bolt can swing within a preset angle relative to the axis of the bolt hole, the universal joint can realize variable angle power transmission, and the structure of the universal joint is simple, thereby reducing the production cost.

[0008] According to some embodiments of the utility model, the bolt hole includes a first expansion section, a connecting section and a second expansion section connected coaxially in sequence, the hole diameter of the first expansion section gradually increases in the direction away from the connecting section, and the hole diameter of the second expansion section gradually increases in the direction away from the connecting section.

[0009] According to some embodiments of the utility model, the first expansion section and the second expansion section are mirror-symmetrical on the two sides of the connecting section.

[0010] According to some embodiments of the present application, the first plane intersects with the first expansion section and forms a first intersection line and a second intersection line, the first plane intersects with the second expansion section and forms a third intersection line and a fourth intersection line, on the first plane, the first intersection line and the third intersection line are located on one side of the axis of the latch hole, the second intersection line and the fourth intersection line are located on the other side of the axis of the latch hole, and the first intersection line is parallel to the fourth intersection line, and the second intersection line is parallel to the third intersection line.

[0011] According to some embodiments of the present application, the connecting section is configured as a cylindrical hole, and the hole diameter of the connecting section is greater than the diameter of the latch.

[0012] According to some embodiments of the present application, the output connector is adapted to be inserted into a transmission shaft, and the outer surface of the output connector is adapted to be rotatably matched with the inner wall of the transmission shaft.

[0013] According to some embodiments of the present application, the input socket is configured as a polygon along a cross section perpendicular to the axis thereof.

[0014] According to some embodiments of the present application, the input connector further has coaxially opposite first and second locking holes, the first and second locking holes are both in communication with the input socket, and the axis of the first locking hole intersects with the axis of the input socket.

[0015] According to some embodiments of the present application, the input connector and the output connector are integrally formed.

[0016] According to another aspect of the present application, a photovoltaic support includes the universal joint.

[0017] According to the photovoltaic support of the present application, the latch hole of the universal joint is adapted to be movably connected with the latch inserted therein, so that the axis of the latch can be swung within a preset angle relative to the axis of the latch hole, and the function of variable-angle power transmission can be realized, and the structure of the universal joint is simple, which is conducive to reducing the production cost.

[0018] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a sectional view of the universal joint according to the embodiments of the present application;

[0020] Figure 2 is a perspective view of the universal joint according to the embodiments of the present application;

[0021] Figure 3 is a sectional view of the universal joint, the latch and the transmission shaft according to an embodiment of the present utility model;

[0022] Figure 4 is a perspective view of the photovoltaic support in some embodiments;

[0023] Figure 5 is Figure 4 is an enlarged view at A;

[0024] Figure 6 is a perspective view of the photovoltaic support in some other embodiments;

[0025] Figure 7 is Figure 6 is an enlarged view at B.

[0026] Reference signs:

[0027] input joint 1; input socket 11; first locking hole 12; second locking hole 13;

[0028] output joint 2; latch hole 21; first expansion section 211; first intersection line 2111; second intersection line 2112; connecting section 212; second expansion section 213; third intersection line 2131; fourth intersection line 2132; second end surface 22;

[0029] universal joint 10; latch 20; transmission shaft 30; driving telescopic rod 40; driven telescopic rod 50; motor 60; support rod 70; slewing reducer 80; photovoltaic support 100. DETAILED DESCRIPTION

[0030] The embodiments of the present utility model are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, which are intended to explain the present utility model, and cannot be understood as a limitation of the present utility model.

[0031] In the description of the present utility model, it is understood that the terms "length", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present utility model.

[0032] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0033] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] The following will be described in detail Figures 1-7 The universal joint 10 and the photovoltaic support 100 having the same according to the embodiments of the present application.

[0035] Referring to Figures 1-3 As shown in the drawings, the universal joint 10 according to the embodiments of the present application comprises: an input connector 1 and an output connector 2, the input connector 1 has an input socket 11, the output connector 2 is fixedly connected with the input connector 1, the output connector 2 has a latch hole 21, the axis of the latch hole 21 is perpendicular to the axis of the input socket 11, and the latch hole 21 is adapted to be movably connected with a latch 20 inserted therein, so that the axis of the latch 20 is swingable within a preset angle relative to the axis of the latch hole 21.

[0036] It should be noted that the input connector 1 is adapted to be connected with the output shaft of a power source, and the output connector 2 is adapted to be connected with a transmission shaft 30, so that the power source and the transmission shaft 30 are indirectly connected through the universal joint 10, and the universal joint 10 can transmit the power output by the power source to the transmission shaft 30, wherein the power source can be a motor, the output shaft of the power source can be inserted into the input socket 11 to connect the power source with the input connector 1, and the latch 20 can be inserted into the latch hole 21 and adapted to be connected with the transmission shaft 30, so that the transmission shaft 30 is connected with the output connector 2 through the latch 20. When the output shaft of the power source rotates, the output shaft can drive the input connector 1 to rotate, the input connector 1 drives the output connector 2 to rotate, the output connector 2 drives the latch 20 to rotate, and the latch 20 drives the transmission shaft 30 to rotate, so as to realize the transmission of the power output by the power source to the transmission shaft 30 through the input connector 1, the output connector 2 and the latch 20 in sequence.

[0037] It can be understood that the axis of the pin 20 is swingable within a preset angle relative to the axis of the pin hole 21, and the universal joint 10 can adapt to the angle change between the axis of the transmission shaft 30 and the axis of the output shaft of the power source, and can realize the function of variable-angle power transmission, that is, in the case of the angle change between the axis of the transmission shaft 30 and the axis of the output shaft of the power source, the universal joint 10 can still reliably transmit the power output by the power source to the transmission shaft 30, and in the working process, the axis of the pin 20 and the axis of the output shaft can always be perpendicular, which is beneficial to the stable and reliable transmission of the pin 20. The preset angle can be 5°-30°.

[0038] In the embodiment, the universal joint 10 can be cast into shape or machined by a solid blank, has a small number of holes, a simple structure, is easy to process, is beneficial to reducing the production cost of the universal joint 10, and has high structural strength, which is beneficial to the stable and reliable transmission of the universal joint 10.

[0039] According to the universal joint 10 in the embodiment of the utility model, the pin hole 21 is suitable for being movably connected with the pin 20 inserted therein, so that the axis of the pin 20 is swingable within a preset angle relative to the axis of the pin hole 21, the function of variable-angle power transmission can be realized, and the universal joint 10 has a simple structure, which is beneficial to reducing the production cost.

[0040] In some embodiments of the utility model, the pin hole 21 comprises coaxially connected first expansion section 211, connecting section 212 and second expansion section 213 in sequence, in the direction that the first expansion section 211 is away from the connecting section 212, the hole diameter of the first expansion section 211 gradually increases, in the direction that the second expansion section 213 is away from the connecting section 212, the hole diameter of the second expansion section 213 gradually increases.

[0041] It can be understood that the first expansion section 211 and the second expansion section 213 can provide movable space for the pin 20, the pin 20 can swing around the center point of the pin 20 in the pin hole 21, that is, there can be an angle between the axis of the pin 20 and the axis of the pin hole 21, so that the transmission shaft 30 connected with the pin 20 can swing around the center point of the pin 20, allowing the axis of the transmission shaft 30 and the axis of the output shaft of the power source to have an angle, and the universal joint 10 can realize the function of variable-angle power transmission.

[0042] In the embodiments not shown in other figures of the utility model, the bolt hole 21 includes a third expansion section and a fourth expansion section coaxially connected, the hole diameter of the third expansion section gradually increases in the direction away from the fourth expansion section, the hole diameter of the fourth expansion section gradually increases in the direction away from the third expansion section, the third expansion section and the fourth expansion section can provide a movable space for the bolt 20, the bolt 20 can swing around the center point of the bolt 20 in the bolt hole 21, so that the transmission shaft 30 connected with the bolt 20 can swing around the center point of the bolt 20, allowing the axis of the transmission shaft 30 and the axis of the output shaft of the power source to have an included angle, and the universal joint 10 can realize the function of variable-angle power transmission.

[0043] Wherein, the axis of the bolt hole 21 is in any plane as the first plane, the third expansion section and the fourth expansion section can be formed as the shape of " >< " with the first plane, which is convenient for processing the third expansion section and the fourth expansion section, and is conducive to reducing the processing difficulty of the bolt hole 21, and the third expansion section and the fourth expansion section can also be formed as the shape of " )( " with the first plane, so that the third expansion section and the fourth expansion section are smoothly connected, and the wear of the bolt 20 can be reduced.

[0044] In some embodiments of the utility model, the first expansion section 211 and the second expansion section 213 are mirror-symmetric on both sides of the connecting section 212, and it can be understood that the length of the bolt 20 on both sides is inserted into the first expansion section 211 and the second expansion section 213 respectively, and the length of the bolt 20 on both sides is the same, the first expansion section 211 and the second expansion section 213 can symmetrically support the bolt 20, which is conducive to the symmetrical stress of both sides of the bolt 20, avoids the large unilateral stress of the bolt 20, reduces the risk of deformation of the bolt 20, and is conducive to improving the stability of power transmission of the universal joint 10.

[0045] In some embodiments of the utility model, referring to Figure 2 The axis of the bolt hole 21 is in any plane as the first plane, the first plane intersects with the first expansion section 211 and forms the first intersection line 2111 and the second intersection line 2112, the first plane intersects with the second expansion section 213 and forms the third intersection line 2131 and the fourth intersection line 2132, on the first plane, the first intersection line 2111 and the third intersection line 2131 are located on one side of the axis of the bolt hole 21, the second intersection line 2112 and the fourth intersection line 2132 are located on the other side of the axis of the bolt hole 21, and the first intersection line 2111 and the fourth intersection line 2132 are parallel, and the second intersection line 2112 and the third intersection line 2131 are parallel.

[0046] It can be understood that the first expansion section 211 and the second expansion section 213 are both configured as a circular truncated cone type hole with a narrow inside and a wide outside, the first plane is any plane where the axis of the pin hole 21 is located, and when the pin 20 is inclined and abuts against the inner wall where the first intersection line 2111 is located, the pin 20 simultaneously abuts against the inner wall where the fourth intersection line 2132 is located, the inner wall of the first expansion section 211 can support the left side of the pin 20, and the inner wall of the second expansion section can support the right side of the pin 20, so that the left and right sides of the pin 20 are uniformly stressed, the risk of deformation of the pin 20 is reduced, the stability of power transmission of the universal joint 10 is improved.

[0047] When the pin 20 is inclined and abuts against the inner wall where the second intersection line 2112 is located, the pin 20 simultaneously abuts against the inner wall where the third intersection line 2131 is located, the inner wall of the first expansion section 211 can support the right side of the pin 20, and the inner wall of the second expansion section can support the left side of the pin 20, so that the left and right sides of the pin 20 are uniformly stressed, the risk of deformation of the pin 20 is reduced, the stability of power transmission of the universal joint 10 is improved.

[0048] In some embodiments of the present application, as shown in Figure 1 The connecting section 212 is configured as a cylindrical hole, and the hole diameter of the connecting section 212 is greater than the diameter of the pin 20, so that the pin 20 can swing in the pin hole 21, which is conducive to compensating for the angular deviation between the transmission shaft 30 and the output shaft of the power source, thereby facilitating the power transmission between the power source and the transmission shaft 30.

[0049] In some embodiments of the present application, as shown in Figure 3 The output connector 2 is adapted to be inserted into the transmission shaft 30, and the outer surface of the output connector 2 is adapted to be rotatably matched with the inner wall of the transmission shaft 30.

[0050] It can be understood that the transmission shaft 30 is configured as a hollow structure, the output connector 2 is inserted into the transmission shaft 30, that is, the transmission shaft 30 is sleeved outside the output connector 2, the output connector 2 can support the inner wall of the transmission shaft 30, which can reduce the risk of deformation of the transmission shaft 30, the outer surface of the output connector 2 is rotatably matched with the inner wall of the transmission shaft 30, so that the universal joint 10 can adapt to the angular change between the transmission shaft 30 and the output shaft of the power source, ensure stable power transmission, and allow the axis of the output shaft and the axis of the transmission shaft 30 to have an included angle, realizing variable-angle power transmission.

[0051] The output connector 2 can be configured as a ball head structure, or the output connector 2 can be configured as a cuboid or a square structure, and an arc surface is machined at the edge by cutting, so that the outer surface of the output connector 2 is rotatably matched with the inner wall of the transmission shaft 30.

[0052] In some embodiments of the utility model, the input socket 11 is configured as a polygon along the cross section perpendicular to its axis, so that the input socket 11 is configured as a polygonal hole, which is beneficial to prevent the output shaft of the power source from rotating relative to the input socket 11, ensure that the universal joint 10 continuously transmits power, and improve the stability and reliability of the universal joint 10 in transmitting power. For example, the input socket 11 can be configured as a quadrilateral along the cross section perpendicular to its axis, so that the input socket 11 is configured as a quadrilateral hole. For another example, the input socket 11 can be configured as a hexagon along the cross section perpendicular to its axis, so that the input socket 11 is configured as a hexagonal hole.

[0053] In this embodiment, referring to FIG. 1, Figure 1 the output shaft of the power source is configured as a hexagonal prism, and the input socket 11 is configured as a hexagonal hole. After the output shaft is inserted into the input socket 11, the output shaft can be effectively prevented from rotating relative to the input socket 11, ensuring that the universal joint 10 continuously transmits power, and improving the stability and reliability of the universal joint 10 in transmitting power.

[0054] In some embodiments of the utility model, referring to FIG. 1, Figures 1-3 the input joint 1 further has coaxially opposite first locking holes 12 and second locking holes 13, the first locking holes 12 and the second locking holes 13 are both in communication with the input socket 11, the axis of the first locking holes 12 intersects the axis of the input socket 11, a fastener can be used to limit the output shaft of the power source by passing through the first locking holes 12 and the second locking holes 13, preventing the output shaft of the power source from being pulled out of the input socket 11, ensuring that the universal joint 10 continuously transmits power, and improving the stability and reliability of the universal joint 10 in transmitting power. The fastener can be a bolt and a nut.

[0055] Specifically, the output shaft of the power source has a fixing hole, when the output shaft is inserted into the input socket 11, the first locking holes 12, the fixing hole and the second locking holes 13 are coaxially communicated, a fastener can be sequentially inserted into the first locking holes 12, the fixing hole and the second locking holes 13, and in the axis direction of the input socket 11, the fastener can limit the output shaft, which can effectively prevent the output shaft from being pulled out of the input socket 11, ensure that the universal joint 10 continuously transmits power, and improve the stability and reliability of the universal joint 10 in transmitting power.

[0056] In some embodiments of the utility model, the fastener can be a fixing pin, the axis of the first locking holes 12 is perpendicular to the axis of the input socket 11, so as to facilitate the machining of the first locking holes 12 and the second locking holes 13, and after the fastener is inserted into the first locking holes 12, the fixing hole and the second locking holes 13, the axis of the fastener can be perpendicular to the axis of the input socket 11, so as to facilitate the stable and reliable transmission of the power output by the output shaft to the input joint 1 through the fastener.

[0057] In some embodiments of the utility model, refer to Figure 1 As shown in the figure, the input joint 1 has a first end face towards the output joint 2, the output joint 2 has a second end face 22 towards the input joint 1, the first end face is connected with the second end face 22, and the area of the second end face 22 is greater than or equal to the area of the first end face. The larger area of the second end face 22 can ensure that the first end face is fully attached to the second end face 22, which is conducive to increasing the connection area of the first end face and the second end face 22, thereby increasing the connection strength of the input joint 1 and the output joint 2. When the input joint 1 transmits power to the output joint 2, it can reduce the risk of breaking at the connection of the input joint 1 and the output joint 2, thereby facilitating the reliability of power transmission of the universal joint 10.

[0058] In some embodiments of the utility model, the input joint 1 and the output joint 2 are integrally formed, and the input joint 1 and the output joint 2 do not need to be connected by fasteners or welded, which is conducive to reducing the assembly steps of the input joint 1 and the output joint 2, thereby facilitating the production efficiency of the universal joint 10, and also facilitating the reduction of the number of parts of the universal joint 10 and the production cost of the universal joint 10.

[0059] The input joint 1 and the output joint 2 can be integrally formed by casting, and multiple universal joints 10 can be simultaneously manufactured in the same set of casting molds, which is conducive to improving the production efficiency of the universal joint 10. The input joint 1 and the output joint 2 can also be integrally formed by machining, which is simple to operate and has low difficulty, facilitating the production of the universal joint 10.

[0060] The universal joint 10 according to the embodiment of the utility model can replace the traditional cross universal joint. The universal joint 10 of the embodiment has a simple structure, is easy to process, is conducive to reducing the production cost of the universal joint 10, has high structural strength, and is conducive to stable and reliable power transmission of the universal joint 10.

[0061] Refer to Figures 1-5 As shown in the figure, the photovoltaic support 100 according to another aspect of the embodiment of the utility model comprises the universal joint 10 described above.

[0062] The photovoltaic support 100 according to the embodiment of the utility model has the pin hole 21 of the universal joint 10 adapted to be movably connected with the pin 20 inserted therein, so that the axis of the pin 20 can swing within a preset angle relative to the axis of the pin hole 21, and the function of variable-angle power transmission can be realized. In addition, the universal joint 10 has a simple structure, which is conducive to reducing the production cost.

[0063] In some embodiments, refer to Figure 4 And Figure 5As shown, the photovoltaic support 100 is constructed as a push rod support. The photovoltaic support 100 may include an active telescopic rod 40, a driven telescopic rod 50, a motor 60, a universal joint 10, a drive shaft 30, and a support rod 70. The motor 60 is used to drive the active telescopic rod 40 to extend and retract. At the same time, the power output by the motor 60 can be transmitted to the driven telescopic rod 50 through the universal joint 10 and the drive shaft 30 in sequence, so that the active telescopic rod 40 and the driven telescopic rod 50 extend and retract synchronously. Thus, the active telescopic rod 40 and the driven telescopic rod 50 can drive the support rod 70 to rotate, thereby adjusting the angle of the photovoltaic panel connected to the support rod 70 to adapt to changes in the angle of sunlight. By transmitting power through the universal joint 10, the number of motors 60 can be reduced, which helps to reduce the cost of the photovoltaic support 100.

[0064] In other embodiments, reference is made to Figure 6 and Figure 7 As shown, the photovoltaic bracket 100 is constructed as a row bracket, with side-by-side support rods 70. The motor of the photovoltaic bracket 100 can drive the right support rod 70 to rotate through a rotary reducer 80 connected to the right support rod 70. At the same time, the power output by the motor 60 can be transmitted to the left support rod 70 through a universal joint 10, a drive shaft 30, and a rotary reducer 80 connected to the left support rod 70, so as to synchronously drive the left and right support rods 70 to rotate. This allows for simultaneous adjustment of the angles of the photovoltaic panels installed on the left and right support rods 70 to adapt to changes in the angle of sunlight. By transmitting power through the universal joint 10, the number of motors 60 can be reduced, thereby helping to reduce the cost of the photovoltaic bracket 100.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A universal joint, characterized in that, include: Input connector (1), the input connector (1) having an input socket (11); Output connector (2), which is fixedly connected to input connector (1), has a pin hole (21) with the axis of the pin hole (21) perpendicular to the axis of the input socket (11). The pin hole (21) is adapted to be movably connected to a pin (20) inserted therein, so that the axis of the pin (20) can swing within a preset angle relative to the axis of the pin hole (21).

2. The universal joint according to claim 1, characterized in that, The pin hole (21) includes a first expansion section (211), a connecting section (212), and a second expansion section (213) connected coaxially in sequence. In the direction away from the connecting section (212) of the first expansion section (211), the diameter of the first expansion section (211) gradually increases. In the direction away from the connecting section (212) of the second expansion section (213), the diameter of the second expansion section (213) gradually increases.

3. The universal joint according to claim 2, characterized in that, The first expansion segment (211) and the second expansion segment (213) are mirror-symmetrical on both sides of the connecting segment (212).

4. The universal joint according to claim 3, characterized in that, The plane containing the axis of the pin hole (21) is a first plane. The first plane intersects with the first expansion section (211) to form a first intersection line (2111) and a second intersection line (2112). The first plane intersects with the second expansion section (213) to form a third intersection line (2131) and a fourth intersection line (2132). On the first plane, the first intersection line (2111) and the third intersection line (2131) are located on one side of the axis of the pin hole (21), and the second intersection line (2112) and the fourth intersection line (2132) are located on the other side of the axis of the pin hole (21). The first intersection line (2111) and the fourth intersection line (2132) are parallel, and the second intersection line (2112) and the third intersection line (2131) are parallel.

5. The universal joint according to claim 4, characterized in that, The connecting segment (212) is constructed as a cylindrical hole, and the diameter of the hole in the connecting segment (212) is larger than the diameter of the pin (20).

6. The universal joint according to claim 1, characterized in that, The output connector (2) is adapted to be inserted into the drive shaft (30), and the outer surface of the output connector (2) is adapted to be rotatably engaged with the inner wall of the drive shaft (30).

7. The universal joint according to claim 1, characterized in that, The input jack (11) has a polygonal cross-section perpendicular to its axis.

8. The universal joint according to claim 7, characterized in that, The input connector (1) also has a first locking hole (12) and a second locking hole (13) that are coaxially opposite each other. The first locking hole (12) and the second locking hole (13) are both connected to the input socket (11), and the axis of the first locking hole (12) intersects the axis of the input socket (11).

9. The universal joint according to any one of claims 1-8, characterized in that, The input connector (1) and the output connector (2) are integrally formed parts.

10. A photovoltaic support structure, characterized in that, Includes the universal joint according to any one of claims 1-9.

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