Transmission, power device and photovoltaic device

Abstract

The application relates to a transmission device, a power device and a photovoltaic device. The transmission device is applied to the photovoltaic device of the related structure. When a power element drives a photovoltaic panel to rotate in a predetermined direction to adjust a light-accepting angle, the self weight of the photovoltaic panel can be used to store energy for an elastic element and help the photovoltaic panel to adjust the angle, and the stored elastic element can provide an auxiliary force for the rotation of the photovoltaic panel, so that the power requirement of the power element is reduced. The transmission device comprises a shell, a worm, a worm wheel and an elastic element. When the worm wheel is at a first angle, the rotational torque of the elastic element applied to the worm wheel is zero. When the worm wheel rotates from the first angle in a first rotating direction, the elastic element is deformed to apply an elastic force in a second rotating direction to the worm wheel. When the worm wheel rotates from the first angle in a second rotating direction, the elastic element is deformed to apply an elastic force in a first rotating direction to the worm wheel.

Description

Technical Field

[0001] This application relates to a transmission device, a power device, and a photovoltaic device. Background Technology

[0002] Worm gear transmission is a common mechanical transmission method, typically used to transmit rotary motion between intersecting shafts. A worm gear transmission device consists of a meshing worm and a worm wheel, where the worm is the driving component and the worm wheel is the driven component. During operation, the worm receives an external driving force, such as the driving force of a motor, and rotates. This rotation drives the meshing worm wheel to rotate, which then transmits this rotational power to the downstream target object, causing it to produce a predetermined motion.

[0003] In practical applications, some targets need to obtain a large driving force to generate the desired motion, which requires high power of the power components (such as motors). However, high-power power components usually have disadvantages such as high cost, large size, and high energy consumption. Summary of the Invention

[0004] In view of this, this application proposes a transmission device, a power device, and a photovoltaic device. Applying the transmission device provided in this application to a photovoltaic device with a related structure can reduce the power requirements of the power components.

[0005] In a first aspect, this application proposes a transmission device, including a housing, a worm gear rotatably disposed within the housing, and a worm wheel rotatably disposed within the housing and meshing with the worm gear. The transmission device further includes an elastic element connected between the worm wheel and the housing.

[0006] When the worm gear is at the first angle, the rotational torque exerted by the elastic element on the worm gear is zero;

[0007] When the worm gear rotates from the first angle along the first rotation direction, the elastic element deforms and applies a spring force to the worm gear along the second rotation direction, wherein the second rotation direction is opposite to the first rotation direction;

[0008] When the worm gear rotates from the first angle along the second rotation direction, the elastic element deforms and applies an elastic force to the worm gear along the first rotation direction.

[0009] In conjunction with the first aspect, in a first possible implementation, the elastic element comprises a plurality of springs, each spring being connected between the worm gear and the housing, wherein,

[0010] A portion of the multiple springs is used to: deform and apply a spring force along the second rotation direction to the worm gear when the worm gear rotates from the first angle along the first rotation direction;

[0011] Another portion of the multiple springs is used to: deform and apply a spring force along the first rotation direction to the worm gear when the worm gear rotates from the first angle along the second rotation direction.

[0012] In conjunction with the first aspect, in a second possible implementation, the elastic element includes a torsion spring, with a first end connected to the housing and a second end connected to the worm gear.

[0013] In conjunction with the second possible implementation of the first aspect, in the third possible implementation, the worm gear includes a wheel body with a gear ring and a wheel axle fixed coaxially with the wheel body, and the torsion spring is sleeved on the wheel axle.

[0014] In conjunction with the third possible implementation of the first aspect, in the fourth possible implementation, multiple torsion springs are provided, and the multiple torsion springs are all sleeved on the axle and arranged sequentially along the length direction of the axle;

[0015] In the length direction of the axle, the directions of rotation of any two adjacent torsion springs are opposite.

[0016] In conjunction with the third possible implementation of the first aspect, in the fifth possible implementation, the elastic element is disposed on the downstream side of the worm gear transmission.

[0017] In a sixth possible implementation, in conjunction with the first aspect or any possible implementation of the first aspect, the transmission device is used to connect the power component and the photovoltaic panel to transmit the driving force provided by the power component to the photovoltaic panel, thereby driving the photovoltaic panel to rotate around the first axis, wherein...

[0018] When the worm gear is at the first angle, the photovoltaic panel is correspondingly at the fourth angle, and the center of gravity of the photovoltaic panel is in the vertical plane and above the first axis, wherein the first axis is in the vertical plane;

[0019] When the worm gear rotates from the first angle along the first rotation direction, the photovoltaic panel correspondingly rotates from the second angle along the third rotation direction. The center of gravity of the photovoltaic panel is located on the first side of the vertical plane, so that the gravity of the photovoltaic panel helps the photovoltaic panel rotate along the third rotation direction. The elastic force applied by the elastic element to the worm gear has a tendency to cause the photovoltaic panel to rotate along the fourth rotation direction, wherein the fourth rotation direction is opposite to the third rotation direction.

[0020] When the worm gear rotates from the first angle along the second rotation direction, the photovoltaic panel correspondingly rotates from the second angle along the fourth rotation direction. The center of gravity of the photovoltaic panel is located on the second side of the vertical plane opposite to the first side, so that the gravity of the photovoltaic panel helps the photovoltaic panel rotate along the fourth rotation direction. The elastic force applied by the elastic element to the worm gear has a tendency to cause the photovoltaic panel to rotate along the third rotation direction.

[0021] Secondly, this application proposes a power device, comprising:

[0022] Power components, and

[0023] Such as the transmission device provided in the first aspect or any possible implementation thereof;

[0024] The output end of the power component is connected to the worm gear to drive the worm gear to rotate.

[0025] Thirdly, this application proposes a photovoltaic device, including a support frame and a photovoltaic panel, wherein the photovoltaic panel is connected to the support frame in a manner rotatable about a first axis, characterized in that the photovoltaic device further includes a power device as described in the second aspect, wherein the worm gear is connected to the photovoltaic panel for driving the photovoltaic panel to rotate about the first axis;

[0026] When the worm gear is at the first angle, the photovoltaic panel is correspondingly at the second angle, and the center of gravity of the photovoltaic panel is in the vertical plane and above the first axis, wherein the first axis is in the vertical plane;

[0027] When the worm gear rotates from the first angle along the first rotation direction, the photovoltaic panel correspondingly rotates from the second angle along the third rotation direction. The center of gravity of the photovoltaic panel is located on the first side of the vertical plane, so that the gravity of the photovoltaic panel helps the photovoltaic panel rotate along the third rotation direction. The elastic force applied by the elastic element to the worm gear has a tendency to cause the photovoltaic panel to rotate along the fourth rotation direction, wherein the fourth rotation direction is opposite to the third rotation direction.

[0028] When the worm gear rotates from the first angle along the second rotation direction, the photovoltaic panel correspondingly rotates from the second angle along the fourth rotation direction. The center of gravity of the photovoltaic panel is located on the second side of the vertical plane opposite to the first side, so that the gravity of the photovoltaic panel helps the photovoltaic panel rotate along the fourth rotation direction. The elastic force applied by the elastic element to the worm gear has a tendency to cause the photovoltaic panel to rotate along the third rotation direction.

[0029] In conjunction with the third aspect, in the first possible implementation, the photovoltaic panel located at the second angle has its photovoltaic working surface perpendicular to the vertical plane;

[0030] In conjunction with the third aspect, in the second possible implementation, the photovoltaic device further includes a constraint component that constrains the rotation range of the photovoltaic panel between a third angle and a fourth angle by blocking the photovoltaic panel. The second angle is located between the third angle and the fourth angle, the angle between the third angle and the second angle is no greater than 180°, and the angle between the fourth angle and the second angle is no greater than 180°.

[0031] Fourthly, this application proposes a transmission device, including a housing, a worm gear rotatably disposed in the housing, and a worm wheel rotatably disposed in the housing and meshing with the worm gear, characterized in that the worm gear includes:

[0032] Worm shaft;

[0033] A toothed worm sleeve, the worm sleeve being fitted onto the worm shaft and meshing with the worm wheel; and

[0034] A constraint mechanism is provided for connecting the worm sleeve and the worm shaft, and the constraint mechanism allows the worm sleeve to move along the length direction of the worm shaft and restricts the worm sleeve from rotating about the length direction;

[0035] The worm shaft is provided with two limiting members located on opposite sides of the worm sleeve, and an elastic element is sandwiched between each limiting member and the worm sleeve along the length direction.

[0036] When the transmission device provided in this application is applied to the photovoltaic equipment according to this application, when the power component drives the photovoltaic panel to rotate in a predetermined direction to adjust the angle of sunlight, not only can the self-weight of the photovoltaic panel be used to store energy for the elastic element and help the photovoltaic panel to adjust the angle, but the energy-stored elastic element can also be used to provide auxiliary force for the rotation of the photovoltaic panel, thereby reducing the power requirements of the power component. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this application, and are not intended to limit this application.

[0038] Figure 1 This is a schematic diagram of the structure of the photovoltaic device in the embodiments of this application.

[0039] Figure 2 yes Figure 1One of the schematic diagrams of the internal structure of the power unit.

[0040] Figure 3 yes Figure 1 The second schematic diagram of the internal structure of the power unit shows that the worm gear body has been removed.

[0041] Figure 4 This is an internal schematic diagram of the power device in an embodiment of this application when the worm gear is at the 0° position.

[0042] Figure 5 This is a structural schematic diagram of the photovoltaic panel in the 0° position in an embodiment of this application, and... Figure 4 The corresponding status of the power unit.

[0043] Figure 6 This is an internal schematic diagram of the power unit when the worm gear is in the +120° position in an embodiment of this application.

[0044] Figure 7 This is a structural schematic diagram of the photovoltaic panel in the embodiment of this application when it is at a +90° position, and... Figure 6 The corresponding status of the power unit.

[0045] Figure 8 This is an internal schematic diagram of the power device in an embodiment of this application when the worm gear is in the -120° position.

[0046] Figure 9 This is a structural schematic diagram of the photovoltaic panel in an embodiment of this application when it is at a negative 90° position, and... Figure 8 The corresponding status of the power unit.

[0047] Figure 10 This is a schematic diagram of the fit between the torsion spring and the axle in an embodiment of this application.

[0048] Figure 11 This is a cross-sectional structural diagram of the worm gear in an embodiment of this application.

[0049] Figure 12 This is a three-dimensional structural diagram of the worm shaft in an embodiment of this application.

[0050] Figure 13 This is a three-dimensional structural diagram of the worm gear sleeve in an embodiment of this application.

[0051] Figure 14 This is a schematic diagram of the transmission device in another embodiment of this application.

[0052] Explanation of reference numerals in the attached figures:

[0053] L1 - First axis, L2 - Second axis;

[0054] 1-Staff;

[0055] 2-Photovoltaic panel, 201-Photovoltaic working face;

[0056] 3-Motor;

[0057] 4-Shell;

[0058] 5-worm gear, 501-worm shaft, 502-worm sleeve, 503-limiting component, 504-disc spring, 501a-groove, 502a-protruding ridge;

[0059] 6-worm gear, 601-wheel body, 602-axle;

[0060] 7-Torsion spring, 701-First end, 702-Second end;

[0061] 8-Fine pin;

[0062] 9-Coupling;

[0063] 10-Shaft;

[0064] 11-Spring. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the described embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It is understood that, without conflict, some technical means of the various embodiments described herein can be substituted for or combined with each other.

[0066] In the description of this application and the claims, the terms "first," "second," etc., are used only to distinguish the described objects and have no sequential or technical meaning. Therefore, objects specified with "first," "second," etc., may explicitly or implicitly include one or more of those objects. Furthermore, the words "one" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one, while "multiple" indicates not less than two.

[0067] In the description of this application and the claims, the terms "connection," "installation," "fixation," and "repository," etc., should be interpreted broadly. For example, "connection" can refer to a separate connection or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a non-detachable connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can also refer to the internal communication of two elements or the interaction between two elements. As another example, "repository" does not necessarily mean complete containment; this concept also includes the containment of a portion that protrudes externally. Those skilled in the art can understand the specific meaning of the aforementioned terms in this application according to the specific circumstances.

[0068] In the description of this application and its claims, the terms "upper," "lower," "horizontal," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the drawings, are used only for the purpose of clearly and simply describing this application, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation. These directional terms are relative concepts used for relative description and clarification, and may change accordingly depending on the orientation of the components in the drawings. For example, if the device in the drawings is flipped, an element described as "below" other elements will be positioned "above" other elements. Those skilled in the art can understand the specific meaning of the aforementioned terms in this application according to the specific circumstances.

[0069] In the description of this application, references to "one embodiment" or "some embodiments" mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0070] The following is combined with Figures 1 to 13 The photovoltaic device according to an embodiment of this application includes a support frame 1, a photovoltaic panel 2, and a power unit. The power unit includes a power component and a transmission device connected to the power component. The photovoltaic panel 2 is connected to the support frame 1 in a manner that allows it to rotate around a first axis L1, thereby making the angle of sunlight exposure of the photovoltaic panel 2 adjustable. The transmission device is connected to the photovoltaic panel 2 to transmit the driving force provided by the power component to the photovoltaic panel, thereby driving the photovoltaic panel 2 to rotate around the aforementioned first axis L1.

[0071] In this embodiment, multiple photovoltaic panels 2 are provided (three are shown in the figure), and correspondingly multiple first axes L1 are also provided. Each photovoltaic panel 2 rotates around its corresponding first axis L1. Furthermore, each photovoltaic panel 2 is connected to the support 1 via its corresponding pivot 10, and the first axis L1 is defined by the pivot 10. In other embodiments, there may be only one photovoltaic panel 2.

[0072] In this embodiment, the power component is specifically a motor 3, and the transmission device adopts a worm gear transmission structure. Specifically, the transmission device includes a housing 4, a worm wheel 6, and a worm 5. Both the worm 5 and the worm wheel 6 are rotatably disposed within the housing 4, and the worm 5 and the worm wheel 6 are meshed together. The axis of rotation of the worm wheel 6 is... Figure 2 The second axis L2 is shown. The motor 3, acting as the power unit, is connected to the worm gear 5 via coupling 9, and the worm wheel 6 is connected via a transition element (the transition element is located in...). Figure 1 (Schematally represented by dashed lines) is connected to photovoltaic panel 2. During operation, worm gear 5 receives the driving force of motor 3 and rotates, which in turn drives the meshing worm wheel 6 to rotate. Worm wheel 6 then transmits the driving force to each downstream photovoltaic panel 2, so that the photovoltaic panel 2 rotates around the first axis L1 to adjust the angle of sunlight.

[0073] The key improvement of this embodiment is that the transmission device further includes an elastic element connected between the worm gear 6 and the housing 4, and the elastic element is configured as follows:

[0074] When worm gear 6 is in Figure 4 The first angle shown (for ease of description, this article will refer to it as...) Figure 4 When the angle of the worm gear 6 is referred to as 0°, the rotational torque exerted by the elastic element on the worm gear 6 is zero. At this time, the photovoltaic panel 2 connected to the downstream side of the worm gear 6 is correspondingly at... Figure 5 The second angle shown (for ease of description, will be...) Figure 5 The angle at which photovoltaic panel 2 is located is also referred to as 0°. At 0°, the center of gravity of photovoltaic panel 2 lies not only within a virtual vertical plane but also above the aforementioned first axis L1, which is located within the aforementioned vertical plane (i.e., the vertical plane passes through the first axis L1). It can be understood that when the center of gravity of photovoltaic panel 2 is within the vertical plane containing the first axis L1, the torque of the photovoltaic panel 2's own weight on the first axis L1 is zero. The self-weight of photovoltaic panel 2 does not have a tendency to cause it to rotate around the first axis L1. If there are no other external forces interfering, photovoltaic panel 2 can remain stationary. Figure 5 The state shown.

[0075] Combination Figure 1 It is not difficult to understand, in Figure 5 , Figure 7 and Figure 9In the diagram, the first axis L1 extends perpendicularly to the paper surface, and the vertical plane is a plane that extends vertically and perpendicularly to the paper surface. Due to the viewing angle, the first axis L1 and the vertical plane appear to be perpendicular to the paper surface. Figure 5 , Figure 7 and Figure 9 It is not directly drawn in the text.

[0076] From the worm gear 6 Figure 4 The 0° position shown is rotated clockwise to... Figure 6 During the first process at the +120° position shown, the photovoltaic panel 2 connected to the worm gear 6 will move accordingly from... Figure 5 The 0° position shown is rotated clockwise to... Figure 7 The +90° position is shown (the transmission ratio from the worm gear 6 to the photovoltaic panel 2 is 4:3). During this first process, the center of gravity of the photovoltaic panel 2 also rotates clockwise relative to the first axis L1, no longer located in the vertical plane, but to the right of the vertical plane. This causes the gravity of the photovoltaic panel 2 to generate a torque on the first axis L1, and this torque helps the photovoltaic panel 2 rotate clockwise. Furthermore, during this first process, the elastic element deforms, applying a spring force to the worm gear 6, which tends to cause the photovoltaic panel 2 to rotate counterclockwise.

[0077] And from the worm gear 6 Figure 4 The 0° position shown is rotated counterclockwise to... Figure 8 During the second process at the -120° position shown, the photovoltaic panel 2 connected to the worm gear 6 will move accordingly from... Figure 5 The 0° position shown is rotated clockwise to... Figure 9 At the -90° position shown, during this second process, the center of gravity of the photovoltaic panel 2 also rotates counterclockwise relative to the first axis L1, no longer located in the vertical plane, but to the left of the vertical plane. This causes the gravity of the photovoltaic panel 2 to generate a torque on the first axis L1, and this torque helps the photovoltaic panel 2 rotate counterclockwise. Furthermore, during this second process, the elastic element deforms, thereby applying a spring force to the worm gear 6, which tends to cause the photovoltaic panel 2 to rotate clockwise.

[0078] In other embodiments, after the worm gear 6 rotates +540° (one and a half turns) clockwise from the 0° position, the photovoltaic panel 2 correspondingly rotates counterclockwise from the 0° position to the -90° position. The transmission ratio between the worm gear 6 and the photovoltaic panel 2 is 6:1. The rotation angle of the worm gear 6 should not be too large to prevent damage to the elastic element due to excessive deformation.

[0079] In this embodiment, the photovoltaic panel 2 at the 0° position has its photovoltaic working surface 201 perpendicular to the vertical plane, meaning it is essentially facing the sky. This is often chosen as the working angle for the photovoltaic panel 2 around noon. The photovoltaic panel 2 at the +90° position has its photovoltaic working surface 201 vertical and facing due east, often chosen as the working angle for the photovoltaic panel 2 in the early morning. The photovoltaic panel 2 at the -90° position has its photovoltaic working surface 201 vertical and facing due west, often chosen as the working angle for the photovoltaic panel 2 in the evening. The user can, as needed, write corresponding instructions to the motor 3, causing the motor 3 to drive the photovoltaic panel 2 via the transmission device to slowly rotate from the +90° position to the -90° position in a daily cycle (e.g., from 5 am to 7 pm), thereby allowing the photovoltaic panel 2 to receive as much sunlight as possible in real time and improving photovoltaic conversion efficiency.

[0080] As can be seen from the above description, in the worm gear 6 from Figure 4 During the clockwise rotation from the 0° position shown, the gravity of the photovoltaic panel 2 and the elastic force of the elastic element exert opposite torques on the worm gear 6. The gravity of the photovoltaic panel 2 assists the rotation of the worm gear 6, while the elastic force of the elastic element resists its rotation. Therefore, as long as the elastic force is less than or does not significantly exceed the gravity, the motor 3, as the power source, only needs to provide a small output torque and power to achieve the clockwise rotation of the photovoltaic panel 2 from the 0° position. Correspondingly, as the worm gear 6 rotates from... Figure 4 During the counterclockwise rotation from the 0° position shown, the gravity of the photovoltaic panel 2 and the elastic force of the elastic element exert opposite torques on the worm gear 6. The gravity of the photovoltaic panel 2 helps the worm gear 6 rotate, while the elastic force of the elastic element prevents the worm gear 6 from rotating. Therefore, as long as the elastic force is less than the gravity or does not exceed the gravity by too much, the motor 3, as the power component, only needs to provide a small output torque and power to achieve the counterclockwise rotation of the worm gear 6 from the 0° position.

[0081] Obviously, in the worm gear 6 from Figure 6 The +120° position shown is rotated counterclockwise back to the starting position. Figure 4 In the third process at the 0° position shown, the gravity of the photovoltaic panel 2 and the elastic force of the elastic element exert opposite torques on the worm gear 6. However, unlike the first process, in this third process, the elastic force of the elastic element helps the worm gear 6 rotate, while the gravity of the photovoltaic panel 2 prevents the worm gear 6 from rotating. Moreover, the elastic force is less than the gravity or the elastic force does not exceed the gravity by much. Therefore, in this third process, the motor 3, as the power component, only needs to provide a small output torque and power to achieve the counterclockwise rotation of the photovoltaic panel 2 from the +90° position.

[0082] From the worm gear 6 Figure 8The -120° position shown is rotated clockwise back to the starting position. Figure 4 In the fourth process at the 0° position shown, the gravity of the photovoltaic panel 2 and the elastic force of the elastic element exert opposite torques on the worm gear 6. However, unlike the second process mentioned above, in this fourth process, the elastic force of the elastic element helps the worm gear 6 rotate, while the gravity of the photovoltaic panel 2 prevents the worm gear 6 from rotating. Moreover, the elastic force is less than the gravity or the elastic force does not exceed the gravity by much. Therefore, in this fourth process, the motor 3, as the power component, only needs to provide a small output torque and power to achieve the clockwise rotation of the photovoltaic panel 2 from the -90° position.

[0083] As mentioned above, the purpose of controlling the photovoltaic panel 2 to rotate around the first axis L1 is to adjust the angle of the photovoltaic panel 2 to receive more sunlight in real time and improve the photovoltaic conversion efficiency. Therefore, the rotation range of the photovoltaic panel 2 only needs to be between -180° and +180° (preferably between -90° and +90°). Within this rotation range, the gravity of the photovoltaic panel 2 and the elastic force of the spring element on the worm gear 6 always satisfy the above relationship, thus reducing the power requirement of the motor 3.

[0084] In this embodiment, as Figure 2 , Figure 3 and Figure 10 As shown, the aforementioned elastic element includes a torsion spring 7, with its first end 701 connected to the housing 4 and its second end 702 connected to the worm gear 6. When the worm gear 6 is in... Figure 4 At the 0° position shown, the torsion spring 7 is in its natural state; when the worm gear 6 moves from... Figure 4 When the 0° position is rotated clockwise or counterclockwise, the torsion spring 7 undergoes elastic deformation and applies a rotational torque in the opposite direction to the worm gear 6.

[0085] Furthermore, in this embodiment, the worm gear 6 includes a toothed gear body 601 and a gear axle 602 coaxially connected to the gear body 601. Two torsion springs 7 are provided, each sleeved on the gear axle 602 and located on opposite sides of the gear body 601, with opposite directions of rotation. The advantage of this arrangement is that it ensures that the worm gear 6... Figure 4 When rotating clockwise and counterclockwise from the 0° position shown, the sum of the rotational torques from all the torsion springs 7 is symmetrical, which helps to simplify the power control of the motor 3 in both forward and reverse directions.

[0086] The elastic element may also include a greater number of torsion springs 7, which are sleeved on the axle 602 and arranged sequentially along the length of the axle 602. Furthermore, any two adjacent torsion springs 7 have opposite directions of rotation along the length of the axle 602, which can achieve the aforementioned effect of simplifying the power control of the motor 3. Of course, the elastic element may also include only one torsion spring 7.

[0087] In other embodiments, such as Figure 14 As shown, the elastic element includes two springs 11, both of which are connected between the housing 4 and the worm gear 6. When the worm gear 6 is at the 0° position, the two springs are symmetrically distributed, and both springs 11 are either in their natural state or both springs 11 are in a stretched state with the sum of their rotational torques on the worm gear 6 being zero. When the worm gear 6 moves from the 0° position... Figure 14 When the worm gear 6 rotates clockwise from the 0° position, the spring 11 on the right is stretched, applying a rotational torque in the opposite direction; when the worm gear 6 rotates clockwise from the 0° position... Figure 14 When the spring 11 on the left is rotated counterclockwise at the 0° position, it is stretched and subjected to a rotational torque in the opposite direction.

[0088] The connection between the elastic element and the worm gear 6 and the housing 4 can be direct or indirect. In this embodiment, the torsion spring 7, as the elastic element, is directly connected to the axle 602 of the worm gear 6 and indirectly connected to the housing 4. Specifically, a thin pin 8 parallel to the axle 602 is fixedly disposed inside the housing 4. The first end 701 of the torsion spring 7 is a ring structure and is sleeved on the thin pin 8, while the second end 702 of the torsion spring 7 is fixedly inserted into the axle 602 of the worm gear 6. This design has the following advantages:

[0089] As is well known, due to the limitations of the gear meshing structure between the worm 5 and the worm wheel 6, the worm wheel 6 can only act as a driven member of the worm 5 and cannot act as a driving member to drive the worm 5. That is, the worm 5 can transmit its rotational motion to the worm wheel 6, but the worm wheel 6 cannot transmit its own rotational motion to the worm 5. Therefore, in this embodiment, the torsion spring 7 applies a rotational torque to the worm wheel 6 only to assist the rotation of the worm wheel 6, helping it to rotate in a predetermined direction, and will not drive the worm wheel 6 to rotate actively when the worm 5 is stationary. Therefore, when the motor 3 stops running, even if the torsion spring 7 applies a rotational torque to the worm wheel 6 (or the center of gravity of the photovoltaic panel 2 deviates from the vertical plane), under the self-locking action of the worm wheel 6 and the worm 5, the worm wheel 6 can still remain stable at its current angular position, thereby stabilizing the downstream photovoltaic panel 2 at its current angular position.

[0090] It is understood that the elastic element (such as the torsion spring 7 mentioned above) does not necessarily have to be directly connected to the worm gear 6. It can also be connected to the downstream side of the worm gear 6, which can also achieve the effect of stabilizing the current angular position of the photovoltaic panel 2.

[0091] The term "downstream side of transmission" has the following meaning: for example, the second component being downstream of the first component in the transmission direction means that, in the power transmission direction, the second component is located downstream of the first component; the driving force of the power component is transmitted from the first component to the second component. Exemplarily, in this embodiment, the worm gear 6 is downstream of the worm 5 in the transmission direction.

[0092] The maximum rotation range of the photovoltaic panel 2 can be achieved by writing control commands to the motor 3. However, in order to avoid damage caused by excessive deformation of the elastic element due to a malfunction of the motor 3, the photovoltaic device may also include a constraint component in some embodiments. The constraint component restricts the rotation range of the photovoltaic panel 2 to between +90° and -90° by blocking the photovoltaic panel 2.

[0093] After prolonged use, a gap will develop between the teeth of the worm gear 6 and the worm 5. When the worm 5 drives the worm gear 6 in the reverse direction or when the worm gear 6 is subjected to an external rotational force, a rigid collision will occur between the teeth of the worm gear 6 and the worm 5, causing damage to the teeth. To alleviate this problem, the structure of the worm 5 has also been improved in this embodiment. Please refer to... Figure 11 and combined Figure 4 In this embodiment, the worm 5 includes a worm shaft 501 and a worm sleeve 502 with teeth. The worm sleeve 502 is sleeved outside the worm shaft 501 and meshes with the worm wheel 6. The worm sleeve 502 and the worm shaft 501 are connected by a constraint mechanism, wherein the constraint mechanism allows the worm sleeve 502 to move along the length direction of the worm shaft 501 and restricts the worm sleeve 502 from rotating around the length direction of the worm shaft 501.

[0094] Specifically, please refer to Figure 12 and Figure 13 The aforementioned constraint mechanism includes a plurality of protruding ribs 502a and a plurality of grooves 501a extending along the length direction of the worm shaft 501. The grooves 501a are formed on the inner surface of the worm sleeve 502, and the protruding ribs 502a are formed on the outer surface of the worm shaft 501. The plurality of protruding ribs 502a are respectively embedded in the plurality of grooves 501a.

[0095] Two limiting members 503 are also fixedly installed on the worm shaft 501. These two limiting members 503 are located on opposite sides of the worm sleeve 502, and a disc spring 504 is clamped between each limiting member 503 and the worm sleeve 502 along the length direction of the worm shaft 501. The limiting members 503 can limit the range of movement of the worm sleeve 502 along the aforementioned length direction.

[0096] In some embodiments, the aforementioned transition element may be a gear assembly, i.e., the rotating shaft 10 of the photovoltaic panel 2 and the wheel axle 602 of the worm gear 6 are connected by the gear assembly, thereby adjusting the transmission ratio from the worm gear 6 to the photovoltaic panel 2 by configuring the specific structure of the gear assembly.

[0097] In other embodiments, the rotating shaft 10 of the photovoltaic panel 2 is coaxially fixed with the wheel axle 602 of the worm gear 6, or the photovoltaic panel 2 is directly fixed on the wheel axle 602 extending out of the housing, and the rotational transmission ratio between the worm gear 6 and the photovoltaic panel 2 is 1:1.

[0098] Please refer to Figure 11 and combined Figures 1 to 9 When motor 3 drives worm shaft 501 to rotate, it aims to drive worm sleeve 502 to rotate via worm shaft 501, and then worm sleeve 502 drives worm wheel 6. Figure 4 When the worm shaft 501 rotates clockwise, the worm sleeve 502, under the reaction force of the worm wheel 6, first slides to the right along the worm shaft 501. During this process, the right-side spring stacked between the limiting member 503 and the worm sleeve 502 is continuously compressed by the worm sleeve 502 until the force exerted by the right-side spring stacked on the worm sleeve 502 is sufficient to drive the worm wheel 6. When the motor 3 stops running and the worm wheel 6 shaft stops rotating, if the worm wheel 6 is subjected to an external force (e.g., an external force from a photovoltaic system) and... Figure 4 Rotating counterclockwise will cause the worm sleeve 502 to move to the right, continuing to compress the spring stack until the force of the spring stack on the worm sleeve 502 is sufficient to counteract the force of the worm wheel 6 on the worm sleeve 502, at which point the worm sleeve 502 stops moving to the right. During this process, the left side of the worm tooth and the right side of the worm wheel tooth remain in contact, with no tooth clearance between the contacting surfaces. Therefore, even if the worm wheel 6 rotates counterclockwise, there will be no significant collision between them. If an external force (such as from the photovoltaic panel 2) is applied to the worm wheel 6 at this time, causing it to rotate clockwise, the two surfaces of the worm wheel tooth and the worm tooth, which were originally in contact, will separate. The worm wheel tooth will move to the left and eventually collide with the right side of the worm tooth. During this process, on the one hand, the disc spring 504 on the left side makes the collision between the worm gear teeth and the worm teeth an elastic collision, reducing the collision force between the two; on the other hand, because the force of the worm gear 6 on the worm sleeve 502 to the right disappears, the worm sleeve 502 moves to the left under the action of the stacked spring on the right side, and moves in the same direction as the worm gear 6 at the mating point. While having an elastic collision, it also reduces the relative speed of the two teeth and reduces collision damage.

Claims

1. A transmission device, comprising a housing, a worm gear rotatably disposed within the housing, and a worm wheel rotatably disposed within the housing and meshing with the worm gear, characterized in that, The transmission device further includes an elastic element connected between the worm gear and the housing. The elastic element includes a plurality of torsion springs, each of which is connected between the worm gear and the housing. When the worm gear is at a first angle, the rotational torque applied by the elastic element to the worm gear is zero. A portion of the plurality of torsion springs is configured such that, when the worm gear rotates from the first angle along a first rotation direction, the elastic element deforms and applies a spring force to the worm gear along a second rotation direction, wherein the second rotation direction is opposite to the first rotation direction; Another portion of the plurality of torsion springs is used to: when the worm gear rotates from the first angle along the second rotation direction, the elastic element deforms and applies an elastic force to the worm gear along the first rotation direction; The plurality of torsion springs are arranged sequentially along the length of the axis of the worm gear; In the longitudinal direction of the worm gear axis, the directions of rotation of any two adjacent torsion springs are opposite.

2. The transmission device according to claim 1, characterized in that, The first end of the torsion spring is connected to the housing, and the second end of the torsion spring is connected to the worm gear.

3. The transmission device according to claim 1, characterized in that, The worm gear includes a wheel body with a gear ring and a wheel axle fixed coaxially with the wheel body, and the torsion spring is sleeved on the wheel axle.

4. The transmission device according to claim 1, characterized in that, The elastic element is disposed on the downstream side of the worm gear transmission.

5. The transmission device according to claim 1, characterized in that, The worm gear includes: Worm shaft; A toothed worm sleeve, the worm sleeve being fitted onto the worm shaft and meshing with the worm wheel; and A constraint mechanism is provided for connecting the worm sleeve and the worm shaft, and the constraint mechanism allows the worm sleeve to move along the length direction of the worm shaft and restricts the worm sleeve from rotating about the length direction.

6. The transmission device according to claim 5, characterized in that, The worm shaft is provided with two limiting members located on opposite sides of the worm sleeve, and a disc spring is clamped between each limiting member and the worm sleeve along the length direction.

7. The transmission device according to any one of claims 1 to 6, characterized in that, The transmission device is used to connect the power component and the photovoltaic panel to transmit the driving force provided by the power component to the photovoltaic panel, thereby driving the photovoltaic panel to rotate around the first axis. When the worm gear is at the first angle, the photovoltaic panel is correspondingly at the second angle, and the center of gravity of the photovoltaic panel is in the vertical plane and above the first axis, wherein the first axis is in the vertical plane; When the worm gear rotates from the first angle along the first rotation direction, the photovoltaic panel correspondingly rotates from the second angle along the third rotation direction. The center of gravity of the photovoltaic panel is located on the first side of the vertical plane, so that the gravity of the photovoltaic panel helps the photovoltaic panel rotate along the third rotation direction. The elastic force applied by the elastic element to the worm gear has a tendency to cause the photovoltaic panel to rotate along the fourth rotation direction, wherein the fourth rotation direction is opposite to the third rotation direction. When the worm gear rotates from the first angle along the second rotation direction, the photovoltaic panel correspondingly rotates from the second angle along the fourth rotation direction. The center of gravity of the photovoltaic panel is located on the second side of the vertical plane opposite to the first side, so that the gravity of the photovoltaic panel helps the photovoltaic panel rotate along the fourth rotation direction. The elastic force applied by the elastic element to the worm gear has a tendency to cause the photovoltaic panel to rotate along the third rotation direction.

8. A power unit, characterized in that, include: Power components, and The transmission device as described in any one of claims 1 to 7; The output end of the power component is connected to the worm gear to drive the worm gear to rotate.

9. A photovoltaic device, comprising a support frame and a photovoltaic panel, the photovoltaic panel being connected to the support frame in a manner rotatable about a first axis, characterized in that, The photovoltaic device further includes the power unit as described in claim 8, wherein the worm gear is connected to the photovoltaic panel for driving the photovoltaic panel to rotate around the first axis; When the worm gear is at the first angle, the photovoltaic panel is correspondingly at the second angle, and the center of gravity of the photovoltaic panel is in the vertical plane and above the first axis, wherein the first axis is in the vertical plane; When the worm gear rotates from the first angle along the first rotation direction, the photovoltaic panel correspondingly rotates from the second angle along the third rotation direction. The center of gravity of the photovoltaic panel is located on the first side of the vertical plane, so that the gravity of the photovoltaic panel helps the photovoltaic panel rotate along the third rotation direction. The elastic force applied by the elastic element to the worm gear has a tendency to cause the photovoltaic panel to rotate along the fourth rotation direction, wherein the fourth rotation direction is opposite to the third rotation direction. When the worm gear rotates from the first angle along the second rotation direction, the photovoltaic panel correspondingly rotates from the second angle along the fourth rotation direction. The center of gravity of the photovoltaic panel is located on the second side of the vertical plane opposite to the first side, so that the gravity of the photovoltaic panel helps the photovoltaic panel rotate along the fourth rotation direction. The elastic force applied by the elastic element to the worm gear has a tendency to cause the photovoltaic panel to rotate along the third rotation direction.

10. The photovoltaic device according to claim 9, characterized in that, The photovoltaic panel at the second angle has its photovoltaic working surface perpendicular to the vertical plane.

11. The photovoltaic device according to claim 9, characterized in that, The photovoltaic device also includes a constraint component, which constrains the rotation range of the photovoltaic panel between a third angle and a fourth angle by blocking the photovoltaic panel. The second angle is located between the third angle and the fourth angle, the angle between the third angle and the second angle is not greater than 180°, and the angle between the fourth angle and the second angle is not greater than 180°.

Images