CN115234623A

CN115234623A - Transmission device, power device and photovoltaic equipment

Info

Publication number: CN115234623A
Application number: CN202210932318.8A
Authority: CN
Inventors: 高峰; 陈艳凤; 刘在祥; 严洪; 蔡园丰; 郝彪; 高天奇
Original assignee: Shanghai Xingye Material Technology Co Ltd
Current assignee: Shanghai Xingye Material Technology Co Ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2022-10-25

Abstract

The utility model relates to a transmission, power device and photovoltaic equipment, with this kind of transmission of this application be applied to the photovoltaic equipment of relevant structure, when power spare drive photovoltaic board carries out the rotation of predetermined direction and adjusts the angle of meeting light, not only usable photovoltaic board's dead weight is the elastic element energy storage and helps the photovoltaic board to carry out the angle modulation, still can utilize the elastic element after the energy storage to provide the auxiliary force for the rotation of photovoltaic board, reduced the power requirement to power spare. The transmission device comprises a shell, a worm wheel and an elastic element; when the worm wheel is at a first angle, the rotation torque applied to the worm wheel by the elastic element is zero; when the worm wheel rotates along a first rotation direction from a first angle, the elastic element deforms to apply elastic force along a second rotation direction to the worm wheel; when the worm wheel rotates along the second rotation direction from the first angle, the elastic element deforms to apply elastic force along the first rotation direction to the worm wheel.

Description

Transmission device, power device and photovoltaic equipment

Technical Field

The application relates to a transmission device, a power device and a photovoltaic device.

Background

Worm and worm gear meshing is a common mechanical transmission mode and is generally applied to transmitting rotary motion between staggered shafts. The worm gear and worm transmission device comprises a worm and a worm wheel which are meshed with each other, wherein the worm is a driving piece, and the worm wheel is a driven piece. When the worm gear works, the worm receives external driving force, such as the driving force of a motor, to rotate, and further drives the worm gear meshed with the worm gear to rotate, and the worm gear transmits the rotating power to a downstream target object to drive the target object to generate preset motion.

In practical applications, some objects need to obtain a large driving force before the predetermined movement is generated, which requires a high power requirement for a power member (e.g. a motor), and the high power member generally has the disadvantages of high cost, large size, and high energy consumption.

Disclosure of Invention

In view of this, this application proposes a kind of transmission, power device and photovoltaic equipment, and the photovoltaic equipment of this application provides this kind of transmission is applied to the photovoltaic equipment of relevant structure, can reduce the power requirement to the power spare.

In a first aspect, the present application provides a transmission device, comprising a housing, a worm rotatably disposed in the housing, and a worm wheel rotatably disposed in the housing and engaged with the worm, the transmission device further comprising an elastic element connected between the worm wheel and the housing,

when the worm wheel is at a first angle, the rotation torque applied to the worm wheel by the elastic element is zero;

when the worm wheel rotates along a first rotation direction from the first angle, the elastic element deforms and applies elastic force along a second rotation direction to the worm wheel, wherein the second rotation direction is opposite to the first rotation direction;

when the worm wheel rotates from the first angle in the second rotation direction, the elastic element deforms and applies an elastic force to the worm wheel in the first rotation direction.

With reference to the first aspect, in a first possible implementation manner, the elastic element includes a plurality of springs, each of which is connected between the worm wheel and the housing, wherein,

some of the plurality of springs are configured to: when the worm wheel rotates along the first rotation direction from the first angle, the deformation is generated to apply elastic force along the second rotation direction to the worm wheel;

another part of the plurality of springs is used for: when the worm wheel rotates from the first angle along the second rotation direction, the deformation is generated to apply the elastic force along the first rotation direction to the worm wheel.

With reference to the first aspect, in a second possible implementation manner, the elastic element includes a torsion spring, a first end of the torsion spring is connected to the housing, and a second end of the torsion spring is connected to the worm wheel.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, the worm wheel includes a wheel body with a gear ring and a wheel shaft coaxially fixed to the wheel body, and the torsion spring is sleeved outside the wheel shaft.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner, a plurality of torsion springs are provided, and the plurality of torsion springs are all sleeved on the wheel axle and are sequentially arranged along the length direction of the wheel axle;

and in the length direction of the wheel axle, the rotating directions of any two adjacent torsion springs are opposite.

With reference to the third possible implementation manner of the first aspect, in a fifth possible implementation manner, the elastic element is disposed on a transmission downstream side of the worm.

With reference to the first aspect or any one of the possible implementation manners of the first aspect, in a sixth possible implementation manner, the transmission device is configured to connect a power member and a photovoltaic panel to transmit a driving force provided by the power member to the photovoltaic panel, so as to drive the photovoltaic panel to rotate around a first axis, wherein,

when the worm wheel is at the first angle, the photovoltaic panel is correspondingly at a fourth angle, and the center of gravity of the photovoltaic panel is in a vertical plane and above the first axis, wherein the first axis is in the vertical plane;

when the worm wheel rotates from the first angle in the first rotation direction, the photovoltaic panel correspondingly rotates from the second angle in a third rotation direction, the center of gravity of the photovoltaic panel is located on a first side of the vertical plane, so that the gravity of the photovoltaic panel assists the photovoltaic panel in rotating in the third rotation direction, and the elastic force exerted by the elastic element on the worm wheel has a tendency to urge the photovoltaic panel to rotate in a fourth rotation direction, wherein the fourth rotation direction is opposite to the third rotation direction;

when the worm wheel rotates from the first angle in the second rotation direction, the photovoltaic panel correspondingly rotates from the second angle in the fourth rotation direction, the center of gravity of the photovoltaic panel is located at a second side of the vertical plane opposite to the first side, so that the gravity of the photovoltaic panel assists the photovoltaic panel in rotating in the fourth rotation direction, and the elastic force exerted by the elastic element on the worm wheel has a tendency to urge the photovoltaic panel to rotate in the third rotation direction.

In a second aspect, the present application provides a power plant comprising:

a power element, and

a transmission as provided in the first aspect or any one of the possible implementations of the first aspect;

the output end of the power part is connected with the worm so as to drive the worm to rotate.

In a third aspect, the present application proposes a photovoltaic device comprising a support and a photovoltaic panel connected to the support in a rotatable manner about a first axis, characterized in that it further comprises a power unit as described in the second aspect, the worm gear being connected to the photovoltaic panel for driving the photovoltaic panel in rotation about the first axis;

when the worm wheel is at the first angle, the photovoltaic panel is correspondingly at a second angle, the center of gravity of the photovoltaic panel is in a vertical plane and above the first axis, and the first axis is in the vertical plane;

With reference to the third aspect, in a first possible implementation manner, the photovoltaic panel at the second angle has a photovoltaic working surface perpendicular to the vertical plane;

with reference to the third aspect, in a second possible implementation manner, the photovoltaic device further includes a restricting member that restricts a rotation range of the photovoltaic panel between a third angle and a fourth angle by blocking the photovoltaic panel, wherein the second angle is between the third angle and the fourth angle, an angle between the third angle and the second angle is not greater than 180 °, and an angle between the fourth angle and the second angle is not greater than 180 °.

In a fourth aspect, the present application provides a transmission device, including a housing, a worm rotatably disposed in the housing, and a worm wheel rotatably disposed in the housing and connected to the worm in a meshing manner, wherein the worm includes:

a worm shaft;

the worm sleeve is sleeved on the worm shaft and meshed with the worm wheel; and

the restraining mechanism is used for connecting the worm sleeve and the worm shaft, allows the worm sleeve to move along the length direction of the worm shaft and limits the rotation of the worm sleeve around the length direction;

the worm shaft is provided with two limiting parts which are respectively positioned at two opposite sides of the worm sleeve, and an elastic element is clamped between each limiting part and the worm sleeve along the length direction.

Be applied to according to the photovoltaic equipment of this application with transmission that provides according to this application, when power spare drive photovoltaic board carries out the rotation of predetermined direction and adjusts the angle of meeting light, not only can utilize the dead weight of photovoltaic board to carry out angle modulation for elastic element energy storage and help photovoltaic board, can utilize the elastic element after the energy storage to provide the auxiliary force for the rotation of photovoltaic board moreover to the power requirement to power spare has been reduced.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description only relate to some embodiments of the present application and are not limiting on the present application.

Fig. 1 is a schematic structural diagram of a photovoltaic device in an embodiment of the present application.

Fig. 2 is one of the internal structural schematic diagrams of the power plant of fig. 1.

Fig. 3 is a second schematic diagram of the internal structure of the power device in fig. 1, wherein the wheel body of the worm wheel is removed.

Fig. 4 is an internal schematic view of the power unit of the present embodiment with the worm gear in the 0 position.

Fig. 5 is a schematic structural view of the photovoltaic panel in the 0 ° position in the embodiment of the present application, corresponding to the state of the power plant in fig. 4.

Fig. 6 is an internal schematic view of the power plant with the worm gear in the +120 position in an embodiment of the present application.

Fig. 7 is a schematic structural view of the photovoltaic panel in the +90 ° position in the embodiment of the present application, corresponding to the state of the power plant in fig. 6.

Fig. 8 is an internal schematic view of the power plant's worm gear in the present application embodiment in the-120 ° position.

Fig. 9 is a schematic view of the structure of the photovoltaic panel in the minus 90 ° position in the embodiment of the present application, corresponding to the state of the power plant in fig. 8.

FIG. 10 is a schematic view of the engagement of the torsion spring with the axle in the embodiment of the present application.

Fig. 11 is a cross-sectional structural view of the worm in the embodiment of the present application.

Fig. 12 is a schematic perspective view of the worm shaft according to the embodiment of the present application.

Fig. 13 is a schematic perspective view showing the structure of the worm cover according to the embodiment of the present application.

Fig. 14 is a schematic view of a transmission according to another embodiment of the present application.

Description of reference numerals:

l1-a first axis, L2-a second axis;

1-a scaffold;

2-photovoltaic panel, 201-photovoltaic working face;

3, a motor;

4-a shell;

5-worm, 501-worm shaft, 502-worm sleeve, 503-limit piece, 504-disc spring, 501 a-groove, 502 a-rib;

6-worm gear, 601-wheel body, 602-wheel shaft;

7-torsion spring, 701-first end, 702-second end;

8-thin pin;

9-a coupler;

10-a rotating shaft;

11-spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application. It will be understood that some of the technical means of the various embodiments described herein may be replaced or combined with each other without conflict.

In the description of the present application and claims, the terms "first," "second," and the like, if any, are used solely to distinguish one from another as between described objects and not necessarily in any sequential or technical sense. Thus, an object defined as "first," "second," etc. may explicitly or implicitly include one or more of the object. Also, the use of the terms "a" or "an" and the like, do not denote a limitation of quantity, but rather denote the presence of at least one of the two, and "a plurality" denotes no less than two.

In the description of the present application and in the claims, the terms "connected," "mounted," "secured," and "received" are to be understood broadly. For example, "connected" may be a separate connection or may be integrally connected; can be directly connected or indirectly connected through an intermediate medium; can be connected in a non-detachable way or in a detachable way; can be mechanically or electrically connected; but also the communication within two elements or the interaction of two elements. For example, "to store" does not necessarily mean to store the entire product completely, and the concept also includes a case of storing a part of the product partially protruding to the outside. The specific meaning of the foregoing terms in the present application can be understood by those skilled in the art as appropriate.

In the description of the present application and in the claims, if there is an orientation or positional relationship indicated by the terms "upper", "lower", "horizontal", etc. based on the orientation or positional relationship shown in the drawings, it is only for the convenience of clearly and simply describing the present application, and it is not indicated or implied that the elements referred to must have a specific direction, be constructed and operated in a specific orientation, and these directional terms are relative concepts for the sake of description and clarification and may be changed accordingly according to the change of orientation in which the elements in the drawings are placed. For example, if the device in the figures is turned over, elements described as "below" other elements would then be oriented "above" the other elements. The specific meaning of the foregoing terms in the present application can be understood by those skilled in the art as appropriate.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise.

A photovoltaic device according to an embodiment of the present application is described below with reference to fig. 1 to 13, and the photovoltaic device includes a support 1, a photovoltaic panel 2, and a power unit including a power member and a transmission connected to the power member. The photovoltaic panel 2 is connected to the support 1 in a rotatable manner about the first axis L1, so that the angle of incidence of the photovoltaic panel 2 is adjustable. The transmission device is connected with the photovoltaic panel 2 to transmit the driving force provided by the power part to the photovoltaic panel, and then the photovoltaic panel 2 is driven to rotate around the first axis L1.

In the present embodiment, the photovoltaic panel 2 is provided in plural numbers (3 are shown in the figure), the first axes L1 are also correspondingly plural, and each photovoltaic panel 2 rotates around a corresponding one of the first axes L1. Further, each photovoltaic panel 2 is connected to the support 1 by a respective rotation shaft 10, the first axis L1 being defined by the rotation shaft 10. In other embodiments, there may be only one photovoltaic panel 2.

In this embodiment, the power member is specifically the motor 3, and the transmission device adopts a worm and gear transmission structure. Specifically, the transmission device includes a housing 4, a worm wheel 6, and a worm 5, wherein the worm 5 and the worm wheel 6 are both rotatably disposed in the housing 4, the worm 5 is in meshed connection with the worm wheel 6, and the rotation axis of the worm wheel 6 is a second axis L2 shown in fig. 2. The electric motor 3 as a drive is connected to the worm 5 via a coupling 9, and the worm wheel 6 is connected to the photovoltaic panel 2 via a transition element (the transition element is schematically shown in fig. 1 by a dashed line). When the photovoltaic panel is in work, the worm 5 receives the driving force of the motor 3 to rotate, and then drives the worm wheel 6 meshed with the worm to rotate, and the worm wheel 6 transmits the driving force to each downstream photovoltaic panel 2 so as to drive the photovoltaic panels 2 to rotate around the first axis L1 to adjust the light-facing angle.

The key improvement of this embodiment is that the transmission further comprises an elastic element connected between the worm wheel 6 and the housing 4, the elastic element being configured to:

when the worm wheel 6 is at a first angle shown in fig. 4 (for convenience of description, the angle at which the worm wheel 6 is located in fig. 4 is referred to as 0 °), the rotation moment applied to the worm wheel 6 by the elastic member is zero, and at this time, the photovoltaic panel 2 connected to the downstream side of the worm wheel 6 is correspondingly at a second angle shown in fig. 5 (for convenience of description, the angle at which the photovoltaic panel 2 is located in fig. 5 is also referred to as 0 °), the center of gravity of the photovoltaic panel 2 at the 0 ° position is not only in a virtual vertical plane but also above the first axis L1, where the first axis L1 is in the vertical plane (i.e., the vertical plane is the vertical plane of the first axis L1). It can be understood that when the center of gravity of the photovoltaic panel 2 is in the vertical plane including the first axis L1, the moment of the gravity of the photovoltaic panel 2 itself to the first axis L1 is zero, the self weight of the photovoltaic panel 2 does not have a tendency to urge the photovoltaic panel 2 to rotate around the first axis L1, and if no other external force interferes at this time, the photovoltaic panel 2 can be maintained in the state shown in fig. 5.

As will be understood from fig. 1, in fig. 5, 7 and 9, the first axis L1 extends perpendicularly to the paper surface, and the vertical plane extends perpendicularly to the paper surface and vertically, and the first axis L1 and the vertical plane are not directly drawn in fig. 5, 7 and 9 for the sake of viewing angle.

In the first process of the worm wheel 6 rotating clockwise from the 0 ° position shown in fig. 4 to the +120 ° position shown in fig. 6, the photovoltaic panel 2 connected to the worm wheel 6 will then rotate clockwise from the 0 ° position shown in fig. 5 to the +90 ° position shown in fig. 7 (the gear ratio of the worm wheel 6 to the photovoltaic panel 2 is 4:3). In this first process, the center of gravity of the photovoltaic panel 2 is also rotated clockwise relative to the first axis L1, no longer in the vertical plane, but to the right of the vertical plane, so that the weight of the photovoltaic panel 2 generates a moment on the first axis L1, and this moment helps the photovoltaic panel 2 to rotate in the clockwise direction. Also in this first process, the elastic element is deformed so as to exert an elastic force on the worm wheel 6, which has a tendency to urge the photovoltaic panel 2 to rotate in the counterclockwise direction.

In a second process of rotating the worm wheel 6 from the 0 ° position shown in fig. 4 to the-120 ° position shown in fig. 8 in the counterclockwise direction, the photovoltaic panel 2 connected to the worm wheel 6 rotates clockwise from the 0 ° position shown in fig. 5 to the-90 ° position shown in fig. 9, and in this second process, the center of gravity of the photovoltaic panel 2 also rotates counterclockwise relative to the first axis L1, is no longer located in the vertical plane, but is located on the left side of the vertical plane, so that the gravity of the photovoltaic panel 2 generates a moment to the first axis L1, and the moment helps the photovoltaic panel 2 rotate counterclockwise. Also in this second process, the elastic element is deformed so as to exert an elastic force on the worm wheel 6, which has a tendency to urge the photovoltaic panel 2 to rotate in the clockwise direction.

In other embodiments, the photovoltaic panel 2 is rotated counterclockwise from the 0 ° position to the-90 ° position only after the worm wheel 6 is rotated +540 ° (one and a half turns) in the clockwise direction from the 0 ° position, and the transmission ratio of the worm wheel 6 to the photovoltaic panel 2 is 6:1. The rotation angle of the worm wheel 6 should not be too large to prevent the elastic element from being damaged due to too large deformation.

In the present embodiment, the working surface 201 of the photovoltaic panel 2 at the 0 ° position is perpendicular to the vertical plane, and the working surface 201 is substantially facing the sky, which is mostly selected as the working angle of the photovoltaic panel 2 at midday. The photovoltaic panel 2 at the +90 ° position, with the photovoltaic working surface 201 in a vertical state and facing the east, is mostly selected as the working angle of the photovoltaic panel 2 in the early morning. The photovoltaic working surface 201 of the photovoltaic panel 2 at the-90 ° position is vertical and faces the front west, and is mostly selected as the working angle of the photovoltaic panel 2 in the evening. The user can be as required, through writing into corresponding instruction to motor 3, makes motor 3 drive photovoltaic board 2 via transmission and slowly rotates to-90 position by +90 position with one day cycle (for example 5 o 'clock earlier 7 o' clock late) to let photovoltaic board 2 receive more illumination as far as possible in real time, promote photovoltaic conversion efficiency.

As can be seen from the above description, in the process of rotating the worm wheel 6 in the clockwise direction from the 0 ° position shown in fig. 4, the gravity of the photovoltaic panel 2 and the elastic force of the elastic element are opposite to each other, wherein the gravity of the photovoltaic panel 2 is used to assist the rotation of the worm wheel 6, and the elastic force of the elastic element is used to prevent the rotation of the worm wheel 6, so that the motor 3 as the power member only needs to provide a small output torque and power to realize the clockwise rotation of the photovoltaic panel 2 from the 0 ° position as long as the elastic force is smaller than the gravity action or the elastic force does not excessively exceed the gravity action. Correspondingly, in the process that the worm wheel 6 rotates in the counterclockwise direction from the 0 ° position shown in fig. 4, the rotation moment of the worm wheel 6 is also opposite to the gravity of the photovoltaic panel 2 and the elastic force of the elastic element, wherein the gravity of the photovoltaic panel 2 is used for assisting the worm wheel 6 to rotate, and the elastic force of the elastic element is used for preventing the worm wheel 6 from rotating, so that the motor 3 as the power member only needs to provide a small output torque and power to realize the counterclockwise rotation of the worm wheel 6 from the 0 ° position as long as the elastic force is smaller than the gravity action or the elastic force does not excessively exceed the gravity action.

Obviously, in the third process of the worm wheel 6 rotating back counterclockwise from the +120 ° position shown in fig. 6 to the 0 ° position shown in fig. 4, the gravity of the photovoltaic panel 2 and the elastic force of the elastic element are opposite to each other to the rotation moment of the worm wheel 6, but unlike the first process, in this third process, the elastic force of the elastic element is used to help the worm wheel 6 rotate, the gravity of the photovoltaic panel 2 is used to stop the worm wheel 6 from rotating, and the elastic force is smaller than the gravity action or the elastic force does not excessively exceed the gravity action, so in this third process, the motor 3 as the power member is also required to provide only a small output torque and power to realize the counterclockwise rotation of the photovoltaic panel 2 from the +90 ° position.

In a fourth process of the worm wheel 6 rotating back clockwise from the-120 ° position shown in fig. 8 to the 0 ° position shown in fig. 4, the gravity of the photovoltaic panel 2 and the elastic force of the elastic element are also opposite to the torque of the worm wheel 6, but unlike the second process, in the fourth process, the elastic force of the elastic element is used to help the worm wheel 6 rotate, the gravity of the photovoltaic panel 2 is used to prevent the worm wheel 6 from rotating, and the elastic force is smaller than the gravity action or the elastic force does not excessively exceed the gravity action, so in this fourth process, the motor 3 serving as a power element also only needs to provide a small output torque force and power to realize the clockwise rotation of the photovoltaic panel 2 from the-90 ° position.

It has been mentioned above that the purpose of controlling the rotation of the photovoltaic panel 2 around the first axis L1 is to adjust the light angle of the photovoltaic panel 2, so as to receive more light 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, the range of-90 ° to +90 °), and just in such a rotation range, the gravity of the photovoltaic panel 2 and the elastic force of the spring element to the worm wheel 6 always satisfy the above relationship, so that the power requirement on the motor 3 can be reduced.

In the present embodiment, as shown in fig. 2, 3 and 10, the elastic member includes a torsion spring 7, a first end 701 of the torsion spring 7 is connected to the housing 4, and a second end 702 of the torsion spring 7 is connected to the worm wheel 6. When the worm wheel 6 is in the 0 ° position shown in fig. 4, the torsion spring 7 is in a natural state; when the worm wheel 6 rotates clockwise or counterclockwise from the 0 ° position shown in fig. 4, the torsion spring 7 is elastically deformed to apply a rotational moment in the opposite direction to the worm wheel 6.

Further, in the present embodiment, the worm wheel 6 includes a wheel body 601 with a toothed portion and an axle 602 coaxially connected to the wheel body 601, two torsion springs 7 are provided, the two torsion springs 7 are respectively sleeved on the axle 602 and located on two opposite sides of the wheel body 601, and the rotation directions of the two torsion springs 7 are opposite. The advantages of such an arrangement are: the worm wheel 6 can be ensured to be symmetrical in the sum of the rotation moments from all the torsion springs 7 when rotating clockwise and anticlockwise from the 0-degree position shown in figure 4, so that the power control of the positive rotation and the negative rotation of the motor 3 is facilitated to be simplified.

The elastic element may also include a greater number of torsion springs 7, and the torsion springs 7 are sleeved on the axle 602 and are sequentially arranged along the length direction of the axle 602, and the rotation directions of any two adjacent torsion springs 7 are opposite in the length direction of the axle 602, which also can achieve the above-mentioned effect of simplifying the power control of the motor 3. Of course, the elastic element may also comprise only one torsion spring 7.

In other embodiments, as shown in fig. 14, the elastic member comprises two springs 11, and both springs 11 are connected between the housing 4 and the worm wheel 6. When the worm wheel 6 is at the 0 degree position, the two springs are symmetrically distributed, the two springs 11 are both in a natural state or the two springs 11 are both in a stretching state, and the sum of the rotating moments exerted on the worm wheel 6 by the two springs is zero. When the worm wheel 6 rotates clockwise from the 0 ° position in fig. 14, the right spring 11 is elongated to apply a rotational moment in the opposite direction thereto; when the worm wheel 6 rotates counterclockwise from the 0 ° position in fig. 14, the left spring 11 is elongated to apply a rotational moment in the opposite direction thereto.

The connection between the elastic element and the worm wheel 6 and the housing 4 may be direct or indirect. In the present embodiment, the torsion spring 7 as the elastic member is directly connected to the wheel shaft 602 of the worm wheel 6 and indirectly connected to the housing 4. Specifically, a thin pin 8 parallel to the axle 602 is fixedly disposed in the housing 4, a first end 701 of the torsion spring 7 is an annular structure and is sleeved on the thin pin 8, and a second end 702 of the torsion spring 7 is fixedly inserted into the axle 602 of the worm wheel 6. The design has the advantages that:

as is well known, the worm wheel 6 can only be used as a driven member of the worm 5 and cannot be used as a driving member for driving the worm 5, i.e. the worm 5 can transmit its rotation to the worm wheel 6, but the worm wheel 6 cannot transmit its rotation to the worm 5, limited by the tooth-matching structure of the worm 5 and the worm wheel 6. Therefore, in the present embodiment, the torsion spring 7 applies the rotation torque to the worm wheel 6 only to provide an assisting force to the rotation of the worm wheel 6 to assist the rotation of the worm wheel 6 in a predetermined direction, and does not drive the worm wheel 6 to rotate actively when the worm 5 is in a stationary state. Therefore, when the motor 3 stops operating, even if the torsion spring 7 applies a rotation moment to the worm wheel 6 (or the center of gravity of the photovoltaic panel 2 deviates from the vertical plane), the worm wheel 6 can be stabilized at the current angular position under the self-locking action of the worm wheel 6 and the worm 5, so that the photovoltaic panel 2 at the downstream is also stabilized at the current angular position.

It will be appreciated that the elastic element (for example the torsion spring 7 described above) does not necessarily have to be directly connected to the worm wheel 6, but it can also be connected on the transmission downstream side of the worm wheel 6, which also achieves the above-described effect of stabilizing the current angular position of the photovoltaic panel 2.

The downstream side of the transmission has the meaning: for example, the second member being on the transmission downstream side of the first member means that the second member is located downstream of the first member in the power transmission direction; the driving force of the power member is transmitted from the first member to the second member. Illustratively, in the present embodiment, the worm wheel 6 is on the transmission downstream side of the worm 5.

The maximum rotation range of the photovoltaic panel 2 can be achieved by writing control instructions to the motor 3. However, in order to avoid the motor 3 from malfunctioning and causing the photovoltaic panel 2 to rotate by a large angle, and the elastic element to be excessively deformed and damaged, in some embodiments, the photovoltaic device may further include a restricting component that restricts the rotation range of the photovoltaic panel 2 between +/-90 ° and-90 ° by blocking the photovoltaic panel 2.

After the worm wheel 6 and the worm 5 are used for a long time, a gap is generated between the teeth of the two, and when the worm 5 drives the worm wheel 6 reversely or the worm wheel 6 is applied with a rotating external force, the teeth of the worm wheel 6 and the teeth of the worm 5 are in rigid collision, so that the two teeth are damaged. In order to alleviate this problem, the present embodiment also improves the structure of the worm 5. Referring to fig. 11 in conjunction with fig. 4, in the present embodiment, the worm 5 includes a worm shaft 501 and a worm sleeve 502 with a toothed portion, the worm sleeve 502 is sleeved outside the worm shaft 501 and engaged with the worm wheel 6, and the worm sleeve 502 and the worm shaft 501 are connected by a restraining mechanism, wherein the restraining mechanism allows the worm sleeve 502 to move along the length direction of the worm shaft 501 and restricts the rotation of the worm sleeve 502 around the length direction of the worm shaft 501.

Specifically, referring to fig. 12 and 13, the restraining mechanism includes a plurality of ribs 502a and a plurality of grooves 501a extending in the longitudinal direction of the worm shaft 501, the grooves 501a are formed on the inner surface of the worm housing 502, the ribs 502a are formed on the outer surface of the worm shaft 501, and the ribs 502a are fitted into the grooves 501a, respectively.

Two limiting members 503 are further fixedly disposed on the worm shaft 501, the two limiting members 503 are respectively located on two opposite sides of the worm sleeve 502, and a disc spring 504 is interposed between each limiting member 503 and the worm sleeve 502 along the length direction of the worm shaft 501. The stopper 503 can limit the range of movement of the worm housing 502 in the longitudinal direction.

In some embodiments, the transition element may be a gear assembly, i.e. the shaft 10 of the photovoltaic panel 2 and the axle 602 of the worm wheel 6 are in driving connection through the gear assembly, whereby the transmission ratio of the worm wheel 6 to the photovoltaic panel 2 may be adjusted by configuring the specific structure of the gear assembly.

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

Referring to fig. 11 in conjunction with fig. 1 to 9, when the motor 3 drives the worm shaft 501 to rotate, the worm housing 502 is driven by the worm shaft 501 to rotate, and then the worm wheel 6 is driven by the worm housing 502 to rotate clockwise in fig. 4, along with the rotation of the worm shaft 501, the worm housing 502 slides to the right along the worm shaft 501 under the reaction force of the worm wheel 6, and during this process, the right overlapping spring between the limiting member 503 and the worm housing 502 is compressed by the worm housing 502 until the force of the right overlapping spring on the worm housing 502 is enough to drive the worm wheel 6 by the worm housing 502. When the motor 3 stops running and the worm wheel 6 shaft stops rotating, if the worm wheel 6 is applied with external force (for example, external force from photovoltaic) and rotates counterclockwise in fig. 4, the worm sleeve 502 is caused to move rightward to press the laminated spring continuously until the force of the laminated spring on the worm sleeve 502 is enough to counteract the force of the worm wheel 6 on the worm sleeve 502, and the worm sleeve 502 stops moving rightward. In this process, the left side surface of the worm gear and the right side surface of the worm gear always keep a collision state, and no tooth side gap exists between the collision surfaces, so that the worm gear 6 does not collide with each other even if rotating counterclockwise. If the worm wheel 6 is rotated clockwise by applying an external force (e.g. an external force from the photovoltaic panel 2), the two surfaces of the worm wheel teeth and the worm teeth which are originally in the attached state are separated, and the worm wheel teeth move leftwards and finally collide and contact with the right side surfaces of the worm teeth. In the process, on one hand, the collision between the worm gear teeth and the worm teeth is elastic due to the left disc spring 504, so that the collision force of the worm gear teeth and the worm teeth is reduced; on the other hand, as the force of worm wheel 6 to worm housing 502 disappears, worm housing 502 moves to the left under the action of the right-side spring stack to the left, and moves in the same direction as worm wheel 6 at the mating position, and the relative speed of the two teeth is reduced while elastically colliding, and the collision damage is reduced.

Claims

1. A transmission comprising a housing, a worm rotatably disposed in the housing, and a worm wheel rotatably disposed in the housing and in meshing engagement with the worm, characterized in that the transmission further comprises an elastic element connected between the worm wheel and the housing, wherein,

2. The transmission of claim 1, wherein the resilient element comprises a plurality of springs, each spring connected between the worm gear and the housing, wherein,

3. The transmission of claim 1, wherein the resilient element comprises a torsion spring having a first end coupled to the housing and a second end coupled to the worm gear.

4. The transmission device as claimed in claim 3, wherein the worm wheel comprises a wheel body with a gear ring and an axle coaxially fixed with the wheel body, and the torsion spring is sleeved outside the axle.

5. The transmission device as claimed in claim 4, wherein a plurality of the torsion springs are provided, and the plurality of the torsion springs are sleeved on the wheel shaft and are sequentially arranged along the length direction of the wheel shaft;

6. The transmission according to claim 4, wherein the elastic member is disposed on a transmission downstream side of the worm.

7. Transmission according to any of claims 1 to 6, wherein the transmission is adapted to connect a power member and a photovoltaic panel for transmitting a driving force provided by the power member to the photovoltaic panel for rotating the photovoltaic panel about a first axis, wherein,

8. A power plant, comprising:

a power element, and

a transmission as claimed in any one of claims 1 to 7;

9. A photovoltaic device comprising a support and a photovoltaic panel rotatably connected to the support about a first axis, characterized in that the photovoltaic device further comprises a power plant according to claim 8, the worm gear being connected with the photovoltaic panel for driving the photovoltaic panel in rotation about the first axis;

10. The photovoltaic device according to claim 9, wherein the photovoltaic panel at the second angle has a photovoltaic working surface perpendicular to the vertical plane.

11. The photovoltaic device according to claim 9, further comprising a restricting member that restricts a rotation range of the photovoltaic panel between a third angle and a fourth angle by blocking the photovoltaic panel, wherein the second angle is between the third angle and the fourth angle, an angle between the third angle and the second angle is not more than 180 °, and an angle between the fourth angle and the second angle is not more than 180 °.

12. A transmission, including the casing, rotatory set up in worm in the casing, and rotatory set up in the casing and with worm gear that the worm meshing is connected, its characterized in that, the worm includes:

a worm shaft;