Photovoltaic tracking support drive device

Abstract

The utility model relates to a kind of photovoltaic tracking support driving devices, including rotary speed reducer, synchronous shaft and reinforcing device.The rotary speed reducer includes shell and rotary output shaft protruding from the shell, the synchronous shaft is fixedly connected with the rotary output shaft.The reinforcing device includes: fixed ring, one end of the fixed ring is equipped with circular chute, the other end is fixedly connected with the shell;Movable seat, the movable seat includes main body part and the extension from the main body part radial extension, the main body part is covered in the end of the synchronous shaft close to the rotary output shaft;The extension at least part extends into the chute.The utility model weakens stress concentration, so that synchronous shaft and rotary connection place are not easy to be torn.

Description

Technical Field

[0001] This utility model relates to a photovoltaic tracking bracket driving device, belonging to the field of photovoltaic technology. Background Technology

[0002] Currently, most photovoltaic tracking brackets on the market use mechanical multi-point drive systems, primarily employing synchronous shafts for multi-point actuation. However, due to the low section modulus and bending stiffness of the synchronous shaft, stress concentration occurs at the rotary connection nodes. When these nodes transmit large bending and torque moments, fatigue cracks are easily initiated locally on the synchronous shaft and propagate along the wall thickness, ultimately leading to through-thickness tearing failure. Utility Model Content

[0003] The purpose of this invention is to provide a photovoltaic tracking bracket drive device that reduces stress concentration and makes the connection between the synchronous shaft and the rotary shaft less prone to tearing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a photovoltaic tracking bracket driving device, comprising a rotary reducer, a synchronous shaft, and a reinforcing device, wherein the rotary reducer comprises a housing and a rotary output shaft extending from the housing, the synchronous shaft is fixedly connected to the rotary output shaft, and the reinforcing device comprises:

[0005] A retaining ring, one end of which has a circular groove, and the other end is fixedly connected to the housing;

[0006] The movable seat includes a main body and an extension extending radially from the main body, the main body covering the end of the synchronous shaft near the rotary output shaft, and the extension extending at least partially into the groove.

[0007] As a further improvement of the present invention, the end of the extension away from the main body is provided with a locking protrusion, which is adapted to the sliding groove.

[0008] As a further improvement of this utility model, the opening of the slide groove faces the housing, and the locking protrusion extends from the extension in a direction away from the housing.

[0009] As a further improvement of the present invention, the technical solution includes a fastener that connects the synchronous shaft, the rotary output shaft and the main body into one unit;

[0010] The main body is provided with a through hole for the fastener to pass through, and the through hole is misaligned with the extension.

[0011] As a further improvement of the present invention, the main body includes a first wall, a second wall, a third wall, and a fourth wall. The first wall, the second wall, the third wall, and the fourth wall are connected end to end to form a cavity. The fastener passes through two opposite holes of the first wall, the second wall, the third wall, and the fourth wall of the main body.

[0012] As a further improvement of the present invention, at least one of the first wall surface, the second wall surface, the third wall surface and the fourth wall surface of the main body has the extension portion and the locking protrusion.

[0013] As a further improvement of the present invention, the fixing ring includes an annular wall portion and an annular rear stop portion. The annular rear stop portion is disposed on the inner side of one end of the annular wall portion. The annular rear stop portion includes a first annular sidewall and a second annular sidewall disposed opposite to each other. The sliding groove is formed on the first annular sidewall.

[0014] Along the extending direction of the synchronous shaft, the distance from the first annular sidewall to the housing is less than the distance from the second annular sidewall to the housing.

[0015] As a further improvement of the present invention, the extension includes a first surface, the locking protrusion is disposed on the first surface, and the first surface at least partially abuts against the first annular sidewall, and the end of the extension away from the main body abuts against the inner wall of the annular wall.

[0016] As a further improvement of the present invention, the extension portion is further provided with a reinforcing portion at one end near the main body portion, and the reinforcing portion abuts against the inner wall of the annular rear stop portion on the side near the locking protrusion.

[0017] As a further improvement of this utility model, it also includes a clamping structure, which is fixedly sleeved on the synchronous shaft and abuts against the fixed ring to limit the displacement of the fixed ring.

[0018] Compared to existing technologies, the photovoltaic tracking bracket drive device of this utility model is equipped with a reinforcing device including a fixed ring and a movable seat. The movable seat can rotate relative to the fixed ring and includes a main body. The main body covers the end of the synchronous shaft near the rotary output shaft and can thicken the synchronous shaft, thereby constructing a gradual stiffness transition zone. This weakens the stress concentration factor caused by geometric discontinuities, reduces stress concentration, and suppresses the risk of fatigue crack propagation. Attached Figure Description

[0019] Figure 1 This is a three-dimensional assembly diagram of the photovoltaic tracking bracket drive device of this utility model;

[0020] Figure 2 yes Figure 1 Partial exploded 3D diagram;

[0021] Figure 3 yes Figure 2 Further 3D breakdown from a different perspective;

[0022] Figure 4 This utility model and Figure 3 A similar exploded view from another perspective;

[0023] Figure 5 This is a partial three-dimensional assembly diagram of the photovoltaic tracking bracket drive device of this utility model;

[0024] Figure 6 yes Figure 5 3D exploded view;

[0025] Figure 7 yes Figure 5 Another view;

[0026] Figure 8 yes Figure 7 3D exploded view;

[0027] Figure 9 This is a perspective view of the fixing ring in the reinforcing device of the photovoltaic tracking bracket drive device of this utility model;

[0028] Figure 10 This is a front view of the fixing ring in the reinforcing device of the photovoltaic tracking bracket drive device of this utility model;

[0029] Figure 11 It is along Figure 10 Sectional view of line AA in the middle;

[0030] Figure 12 This is a perspective view of the reinforcing device of the photovoltaic tracking bracket drive device of this utility model, specifically the movable seat therein;

[0031] Figure 13 yes Figure 7 Left side view;

[0032] Figure 14 It is along Figure 13 Sectional view of the middle BB line;

[0033] Figure 15 yes Figure 14 Enlarged view of section C. Detailed Implementation

[0034] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. If several embodiments exist, features in these embodiments may be combined with each other without conflict. When the description refers to the drawings, unless otherwise stated, the same numbers in different drawings represent the same or similar elements. The descriptions in the following exemplary embodiments do not represent all embodiments consistent with the present invention; rather, they are merely examples of apparatuses, products, and / or methods consistent with some aspects of the present invention as set forth in the claims.

[0035] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of protection of this invention. The singular forms “a,” “the,” or “the” used in the specification and claims of this invention are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0036] It should be understood that the terms "first," "second," and similar words used in the specification and claims of this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish the features. Similarly, the terms "an" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one. Unless otherwise stated, the terms "front," "back," "left," "right," "upper," "lower," and similar words appearing in this utility model are for ease of explanation only and are not limited to a specific location or spatial orientation. The terms "comprising" or "including" are an open-ended expression, meaning that the element preceding "comprising" or "including" covers the element following "comprising" or "including" and its equivalents, which does not exclude that the element preceding "comprising" or "including" may also include other elements. If "several" appears in this utility model, it means two or more.

[0037] Please refer to Figures 1 to 15 As shown, this utility model discloses a photovoltaic tracking bracket drive device applied to a multi-point driven photovoltaic tracking bracket. The multi-point driven photovoltaic tracking bracket has drive mechanisms (e.g., rotary reducers) at multiple points on the main shaft, with only one point equipped with a drive motor as the active drive mechanism, and the remaining points as driven drive mechanisms. A synchronous shaft connects the active and driven drive mechanisms. The power of the drive motor is transmitted to multiple driven drive points via the synchronous shaft, thereby achieving synchronous driving of the photovoltaic bracket at multiple drive points.

[0038] Please refer to Figures 1 to 15As shown, the photovoltaic tracking bracket drive device includes a rotary reducer 200, a synchronous shaft 300, and a reinforcing device 100. The rotary reducer 200 includes a housing 201 and a rotary output shaft 202 extending from the housing 201, wherein the rotary output shaft 202 is rotatable relative to the housing 201; the synchronous shaft 300 is fixedly connected to the rotary output shaft 202 so that when the rotary reducer 200 is started, the rotary output shaft 202 can drive the synchronous shaft 300 to rotate relative to the housing 201. The reinforcing device 100 is disposed at the connection node between the synchronous shaft 300 and the rotary reducer 200, and includes: a fixed ring 1, one end of which is provided with a circular groove 10, and the other end is fixedly connected to the housing 201; a movable seat 2, which includes a main body 21 and an extension 22 extending radially from the main body 21. The main body 21 covers the end of the synchronous shaft 300 near the rotary output shaft 202 to thicken the synchronous shaft 300. The extension 22 extends at least partially into the groove 10. Through the cooperation between the extension 22 and the groove 10, the movable seat 2 and the fixed ring 1 can be rotatably connected.

[0039] Specifically, the shape of the main body 21 of the movable seat 2 is adapted to the shape of the synchronous shaft 300, so that the main body 21 is close to the synchronous shaft 300, thereby increasing the wall thickness of the synchronous shaft 300 and improving its section modulus and bending strength. The movable seat 2 is fixedly installed on the synchronous shaft 300 through the main body 21, and the fixing ring 1 is fixedly installed on the housing 201. When the rotary reducer 200 starts, the movable seat 2 rotates together with the synchronous shaft 300, while the fixing ring 1 installed on the housing 201 remains stationary, so that the movable seat 2 can rotate relative to the fixing ring 1. Through the cooperation of the extension 22 and the slide groove 10, the rotational connection between the movable seat 2 and the fixing ring 1 is further realized, thereby creating a gradual stiffness transition zone, effectively optimizing the stress distribution at the connection node between the synchronous shaft 300 and the rotary reducer 200, alleviating stress concentration, and thus improving the long-term reliability of the photovoltaic tracking bracket.

[0040] The photovoltaic tracking bracket drive device of this utility model sets up a reinforcing device 100 at the connection node between the synchronous shaft 300 and the rotary reducer 200. While locally thickening the synchronous shaft 300, it can also construct a gradual stiffness transition zone, weaken the stress concentration coefficient caused by geometric discontinuity, alleviate the stress concentration at the connection node between the synchronous shaft 300 and the rotary reducer 200, and suppress the risk of fatigue crack propagation.

[0041] For some specific implementation methods, please refer to Figures 1 to 11As shown, a circular groove 10 is disposed inside the fixed ring 1, and the extension 22 partially extends into the groove 10, meaning that the movable seat at least partially extends into the fixed ring 1. This effectively reduces the impact of adverse environmental factors such as wind, rain, and dust, extending the service life. The other end of the fixed ring 1 away from the groove 10 is fixedly connected to the housing 201 of the rotary reducer 200 by glue or clamps to ensure that the fixed ring 1 will not be displaced relative to the housing 201 of the rotary reducer 200, thereby ensuring the stability of the rotational connection between the fixed ring 1 and the movable seat 2.

[0042] For further details, please refer to Figure 12 As shown, the end of the extension 22 away from the main body 21 is provided with a locking protrusion 221, which is adapted to the slide groove 10. When the movable seat 2 rotates together with the synchronous shaft 300, the locking protrusion 221 slides along the slide groove 10. Through the cooperation between the locking protrusion 221 and the slide groove 10, a rotational connection between the movable seat 2 and the fixed ring 1 can be achieved. When extreme wind loads cause a surge in load at the connection node between the synchronous shaft 300 and the rotary reducer 200, the fixed seat 2 diverts part of the bending moment and lateral shear force to the fixed ring 1, thereby reducing the peak stress and suppressing the risk of fatigue crack propagation.

[0043] The opening of the slide groove 10 faces the housing 201, and the locking protrusion 221 extends from the extension 22 in a direction away from the housing 201. By setting the opening of the slide groove 10 to face the housing 201, the influence of adverse environmental factors such as wind, rain, and dust can be reduced, while limiting the axial displacement of the movable seat 2 along the synchronous shaft 300, that is, preventing the movable seat 2 from shifting due to the downward deflection of the synchronous shaft. In other possible embodiments, the opening of the slide groove 10 faces the main body 21, and the extending direction of the locking protrusion 221 is consistent with the extending direction of the extension 22.

[0044] Please refer to Figures 3 to 8 As shown, this utility model includes a fastener 3, which connects the synchronous shaft 300, the rotary output shaft 202, and the main body 21 into a single unit. The main body 21 has a through hole 210 for the fastener 3 to pass through, and the through hole 210 is misaligned with the extension 22. In a specific embodiment, the fastener 3 includes a bolt 31 and a nut 32. By having the bolt 31 pass through the main body 21, the synchronous shaft 300, and the rotary output shaft 202 in sequence and lock it with the nut 32, the synchronous shaft 300, the rotary output shaft 202, and the main body 21 can be fixed together. The through hole 210 for the bolt 31 to pass through, which is misaligned with the extension 22, prevents the bolt 31 from interfering with the fixing ring 1. The fastener 3, with this configuration, ensures that the rotary output shaft 202 can drive the synchronous shaft 300 and the movable seat 2 to rotate synchronously.

[0045] In some implementation methods, please refer to Figure 3As shown, the synchronous shaft 300 is a hollow square tube, and the rotary output shaft 202 is a square shaft. Please refer to... Figure 6 , Figure 7 and Figure 12 As shown, the shape of the main body 21 is adapted to the outer contour of the synchronous shaft 300, including a first wall surface 211, a second wall surface 212, a third wall surface 213, and a fourth wall surface 214. These four walls are sequentially connected end-to-end to form a cavity 20. The fastener 3 passes through not only two opposite sections of the first wall surface 211, second wall surface 212, third wall surface 213, and fourth wall surface 214 of the main body 21, but also through two opposite walls of the synchronous shaft 300 and two opposite walls of the rotary output shaft 202. Please refer to... Figure 3 Both the opposite walls of the synchronous shaft 300 and the opposite walls of the rotary output shaft 202 are provided with through holes (not labeled) for the bolts 31 of the fasteners 3 to pass through. In this way, the synchronous shaft 300, the rotary output shaft 202, and the main body 21 are connected as a single unit. In other possible embodiments, the synchronous shaft 300 can be a round tube, a hexagonal tube, or other irregularly shaped tube, and the rotary output shaft 202 can be a round shaft, a hexagonal shaft, or other irregularly shaped shaft.

[0046] Please refer to Figures 7 to 12 As shown, at least one of the first wall surface 211, the second wall surface 212, the third wall surface 213, and the fourth wall surface 214 of the main body 21 has an extension 22 and a locking protrusion 221. It can be understood that the locking protrusion 221 on at least one extension 22 extends into the slide groove 10, thereby realizing the rotational connection between the movable seat 2 and the fixed ring 1.

[0047] Please refer to Figure 7 and combined Figure 12 As shown, in a preferred embodiment, the extension 22 and the locking protrusion 221 are at least two oppositely arranged, which can ensure that the movable seat 2 is positioned on the fixed ring 1 in a dual manner.

[0048] Please refer to Figure 12 As shown, in a preferred embodiment, each of the first wall surface 211, the second wall surface 212, the third wall surface 213, and the fourth wall surface 214 is provided with an extension 22 and a locking protrusion 221. In other words, the movable seat 2 extends outward with four extensions 22 and locking protrusions 221, and the four locking protrusions 221 form multiple positioning fulcrums for the movable seat 2 in the circumferential direction of the fixed ring 1, making it more stable.

[0049] Please continue to refer to Figure 12As shown, each locking protrusion 221 is arranged parallel to its corresponding first wall surface 211, second wall surface 212, third wall surface 213, and fourth wall surface 214. This arrangement of the locking protrusion 221 facilitates its insertion into the slide groove 10 for positioning.

[0050] Please refer to Figure 3 , Figure 4 , Figures 8 to 11 As shown, the fixing ring 1 includes an annular wall portion 11 and an annular rear stop portion 12. The annular rear stop portion 12 is located on the inner side of one end of the annular wall portion 11. The annular rear stop portion 12 includes a first annular sidewall 1201 and a second annular sidewall 1202 arranged opposite each other along the axial direction. The sliding groove 10 is formed in the first annular sidewall 1201. Along the extension direction of the synchronous shaft 300, the distance from the first annular sidewall 1201 to the housing 201 is smaller than the distance from the second annular sidewall 1202 to the housing 201.

[0051] Specifically, the annular rear stop 12 also includes an inner wall surface and an outer wall surface connecting the first annular sidewall 1201 and the second annular sidewall 1202. The annular wall portion 11 has a cylindrical structure with two open ends arranged opposite to each other and extending through the front and rear. The annular rear stop 12 is located at the open end of the annular wall portion 11 away from the housing 201, and the outer wall surface of the annular rear stop 12 is attached to the inner side of the annular wall portion 11. The sliding groove 10 is formed in the first annular sidewall 1201, that is, the circular sliding groove 10 is located inside the movable seat 2. Its function is to limit the axial displacement of the movable seat 2 (when the synchronous shaft 300 rotates, it is easy to deflect downwards, which will cause the movable seat 2 to shift axially) and to prevent wind, sand and rainwater from seeping in.

[0052] For further details, please refer to Figures 12 to 15 As shown, the extension 22 includes a first surface 220, a locking protrusion 221 disposed on the first surface 220, and the first surface 220 at least partially abuts against the first annular sidewall 1201. The end of the extension 22 away from the main body 21 abuts against the inner wall of the annular wall 11. This arrangement enhances the tightness of the fit between the annular rear stop 12 and the extension 22 and ensures the sliding connection between the extension 22 and the slide groove 10, so that the movable seat 2 can rotate smoothly relative to the fixed ring 1.

[0053] Furthermore, as mentioned above, please refer to... Figure 12 As shown, the extension 22 is further provided with a reinforcing part 23 at one end near the main body 21, and the reinforcing part 23 abuts against the inner wall of the annular rear stop 12 on the side near the locking protrusion 221. This arrangement enhances the strength of the extension 22 and improves the locking force of the locking protrusion 221.

[0054] Please refer to Figures 1 to 3As shown, this utility model also includes a clamping structure 4. The clamping structure 4 is fixedly sleeved on the synchronous shaft 300 and abuts against the fixing ring 1, used to limit the displacement of the fixing ring 1. In a specific embodiment of this utility model, the clamping structure 4 is a one-piece stamped design; in other embodiments, the clamping structure 4 can also be a two-piece design that is formed separately and then assembled into a single unit. Figure 3 In the embodiment where the synchronous shaft 300 is a hollow square tube and the rotary output shaft 202 is a square shaft, the clamping structure 4 is square; in other embodiments, the clamping structure 4 varies according to the cross-sectional shape of the synchronous shaft 300 and the rotary output shaft 202.

[0055] In summary, the photovoltaic tracking bracket drive device of this utility model has the following beneficial effects:

[0056] 1. Because the present invention implements a local wall thickness increase design for the shaft head of the synchronous shaft 300 (that is, the main body 21 covers the end of the synchronous shaft 300 near the rotary output shaft 202 to thicken the synchronous shaft 300), in order to increase the section modulus and reduce the stress concentration factor, the connection between the synchronous shaft and the rotary shaft is not easily torn.

[0057] 2. When the synchronous shaft 300 rotates, the movable seat 2 rotates together with the synchronous shaft 300. When extreme wind loads cause the load at the connection node to surge, by diverting part of the bending moment and lateral shear force to the fixed ring, the peak stress of the synchronous shaft 300 is reduced, and the risk of fatigue crack propagation is suppressed.

[0058] 3. This utility model achieves rigid load transmission between the shaft head of the synchronous shaft 300 and the rotary output shaft 202 through the connection between the movable seat 2 and the fixed ring 1. In other words, the movable seat 2 can achieve the connection between the rotary reducer 200 and the synchronous shaft 300 during the rotation of the movable seat 2 relative to the fixed ring 1, thereby realizing the transmission of force.

[0059] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. The understanding of the present utility model should be based on those skilled in the art. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present utility model. All technical solutions and improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. A photovoltaic tracking bracket driving device, comprising a rotary reducer (200), a synchronous shaft (300), and a reinforcing device (100), wherein the rotary reducer (200) comprises a housing (201) and a rotary output shaft (202) extending from the housing (201), and the synchronous shaft (300) is fixedly connected to the rotary output shaft (202), characterized in that, The strengthening device (100) includes: A fixing ring (1) is provided at one end with a circular groove (10) and at the other end is fixedly connected to the housing (201); The movable seat (2) includes a main body (21) and an extension (22) extending radially from the main body (21). The main body (21) covers the end of the synchronous shaft (300) near the rotary output shaft (202). The extension (22) extends at least partially into the groove (10).

2. The photovoltaic tracking bracket driving device as described in claim 1, characterized in that: The extension (22) has a locking protrusion (221) at one end away from the main body (21), and the locking protrusion (221) is adapted to the slide groove (10).

3. The photovoltaic tracking bracket driving device as described in claim 2, characterized in that: The opening of the groove (10) faces the housing (201), and the locking protrusion (221) extends from the extension (22) in a direction away from the housing (201).

4. The photovoltaic tracking bracket driving device as described in claim 2, characterized in that: Includes fasteners (3), which connect the synchronous shaft (300), the rotary output shaft (202) and the main body (21) into one unit; The main body (21) is provided with a through hole (210) through which the fastener (3) passes, and the through hole (210) is misaligned with the extension (22).

5. The photovoltaic tracking bracket driving device as described in claim 4, characterized in that: The main body (21) includes a first wall surface (211), a second wall surface (212), a third wall surface (213), and a fourth wall surface (214). The first wall surface (211), the second wall surface (212), the third wall surface (213), and the fourth wall surface (214) are connected end to end to form a cavity (20). The fastener (3) passes through two opposite parts of the first wall surface (211), the second wall surface (212), the third wall surface (213), and the fourth wall surface (214) of the main body (21).

6. The photovoltaic tracking bracket driving device as described in claim 5, characterized in that: At least one of the first wall surface (211), the second wall surface (212), the third wall surface (213), and the fourth wall surface (214) of the main body (21) has the extension (22) and the locking protrusion (221).

7. The photovoltaic tracking bracket driving device as described in claim 3, characterized in that: The fixing ring (1) includes an annular wall portion (11) and an annular rear stop portion (12). The annular rear stop portion (12) is located on the inner side of one end of the annular wall portion (11). The annular rear stop portion (12) includes a first annular sidewall (1201) and a second annular sidewall (1202) arranged opposite to each other. The sliding groove (10) is formed in the first annular sidewall (1201). Along the extending direction of the synchronous shaft (300), the distance from the first annular sidewall (1201) to the housing (201) is less than the distance from the second annular sidewall (1202) to the housing (201).

8. The photovoltaic tracking bracket driving device as described in claim 7, characterized in that: The extension (22) includes a first surface (220), the locking protrusion (221) is disposed on the first surface (220), and the first surface (220) at least partially abuts against the first annular sidewall (1201), and one end of the extension (22) away from the main body (21) abuts against the inner wall of the annular wall (11).

9. The photovoltaic tracking bracket driving device as described in claim 8, characterized in that: The extension (22) is further provided with a reinforcing part (23) at one end near the main body (21), and the reinforcing part (23) abuts against the inner wall of the annular rear stop (12) on the side near the locking protrusion (221).

10. The photovoltaic tracking bracket driving device as described in claim 1, characterized in that: It also includes a clamping structure (4), which is fixedly sleeved on the synchronous shaft (300) and abuts against the fixed ring (1) to limit the displacement of the fixed ring (1).

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