Energy accumulator, multi-stage energy accumulator, and photovoltaic tracking system

Abstract

An energy accumulator, comprising: a fixed member (3), first joint portions (31) being provided on the fixed member; a movable member (2), connected to an external load and forming rotational fit with the fixed member, second joint portions (21) being provided on the movable member; and an assist unit, comprising: an elastic member (41), arranged between the movable member and the fixed member, one end of the elastic member being connected to the fixed member; and a conversion structure (42), arranged on the other end of the elastic member, the conversion structure being located between the movable member and the fixed member, and the conversion structure comprising adapter portions (421). The energy accumulator has advantages, such as high safety, high degree of automation, high practicability, effectively reducing the cost, and being more environmentally-friendly. Also disclosed are a multi-stage energy accumulator comprising the energy accumulator, and a photovoltaic tracking system comprising the energy accumulator or the multi-stage energy accumulator.

Description

Accumulators, multi-stage accumulators and photovoltaic tracking systems

[0001] This application claims priority to Chinese patent applications with application numbers CN2024102030819, CN2024203403713 and CN2024203403696, filed on February 23, 2024, the entire contents of which are incorporated herein by reference. This application also claims priority to Chinese patent application with application number CN202410462407X, filed on April 17, 2024, and Chinese patent applications with application numbers CN202422713215X, CN202422713222X and CN2024227132200, filed on November 7, 2024, which are hereby incorporated by reference. Technical Field

[0002] The present invention relates to the technical field of photovoltaic tracking systems, and in particular to an accumulator, a multi-stage accumulator and a photovoltaic tracking system. Background Art

[0003] With global climate change, the demand for renewable energy, and policy support from many countries, photovoltaic power generation technology has continued to develop and advance in recent years, and the photovoltaic power generation market has also grown rapidly. Photovoltaic power generation is a technology that uses photovoltaic panels, controllers, and inverters to directly convert light energy into electrical energy using the photovoltaic effect at the semiconductor interface.

[0004] The photovoltaic tracking system has also been continuously developed along with the photovoltaic power generation technology. The photovoltaic tracking system uses an automatic tracking system to track the movement of the sun, so that sunlight directly hits the photovoltaic array (i.e. photovoltaic panel), increasing the amount of solar radiation received, thereby improving power generation efficiency. In the process of using the automatic tracking system to track the movement of the sun, the photovoltaic panel will rotate around its axis with the movement of the sun, supported by the photovoltaic bracket.

[0005] The rotating axis of the photovoltaic panel is usually set horizontally, and the photovoltaic panel is a cantilever design. When the photovoltaic panel is driven by a power source (such as a motor), the following situations may occur: First, the center of gravity of the photovoltaic panel moves from a high position to a low position. At this time, the torque output by the power source is usually used to prevent the photovoltaic panel from rotating freely, that is, to overcome the influence of gravity; second, the center of gravity of the photovoltaic panel moves from a low position to a high position. At this time, the torque output by the power source must not only overcome the effect of gravity, but also be able to drive the photovoltaic panel to move.

[0006] In the above two situations, when the center of gravity of the photovoltaic panel and the central axis of the rotation shaft are at the same horizontal position, the gravity influence of the photovoltaic panel is the greatest.

[0007] As a result, when selecting a power source to drive a load driven by a non-vertically set transmission shaft to rotate around the axis, the selection of the power source must consider whether the torque it outputs can meet the situation when the center of gravity of the load is at the same horizontal position as the central axis of the rotating shaft. When the load rotates around the axis, the power source will be in excess, thereby increasing costs.

[0008] To solve this problem, it has been proposed to use springs as auxiliary power sources. However, as we all know, springs cannot be stretched infinitely. At the same time, when the elastic coefficient of the spring is fixed, as the deformation of the spring increases, the feedback elastic force also increases. That is, the elastic force of the spring is proportional to the deformation. As a result, the angle at which the rotating shaft drives the load to rotate is limited, and thus it cannot adapt to the tracking work of photovoltaic panels. This is a problem that needs to be solved urgently. Summary of the Invention

[0009] The first object of the present invention is to provide an accumulator to solve the problem of limited load rotation angle in spring-assisted accumulators. The second object of the present invention is to provide a multi-stage accumulator. The third object of the present invention is to provide a photovoltaic tracking system.

[0010] The present invention is achieved by the following technical solutions:

[0011] As a first aspect of the present invention, an accumulator comprises:

[0012] A fixing member, wherein the fixing member is provided with a first coupling portion;

[0013] A movable member is connected to the external load and forms a rotational fit with the fixed member, wherein the movable member is provided with a second coupling portion;

[0014] A power-assisting unit, comprising:

[0015] An elastic member is provided between the movable member and the fixed member, one end of the elastic member is connected to the fixed member,

[0016] a conversion structure, provided at the other end of the elastic member, the conversion structure being located between the movable member and the fixed member, the conversion structure including a transition portion;

[0017] In the initial state, under the contact of the fixing member, the transition portion cooperates with the second coupling portion;

[0018] When accumulating force, the movable member rotates in the first direction, driving the conversion member to rotate via the second coupling portion, thereby pulling the elastic member through the conversion structure to cause it to deform; when the predetermined position is reached and the deformation of the elastic member reaches a predetermined value, the adapter portion separates from the second coupling portion and, under the action of the movable member, cooperates with the first coupling portion, and the elastic member is in an energy-accumulating state;

[0019] When releasing energy, the movable part rotates in the opposite direction of the first direction. When reaching a predetermined position, the adapter part disengages from the first combining part and engages with the second combining part again. The elastic force of the elastic part acts on the second combining part through the adapter part, thereby driving the movable part to continue to rotate in the opposite direction of the first direction until the elastic part returns to its initial state.

[0020] As a second aspect of the present invention, a multi-stage accumulator includes the accumulator as described above, wherein the number of the power-assisting units is more than one group, and the multiple groups of the power-assisting units are coaxially arranged;

[0021] In the initial state, under the contact of the fixing member, the adapter portion of each group of the power-assisting units cooperates with the second coupling portion, and the arc lengths between the adapter portion and the pushing portion of the second coupling portion in each group of the power-assisting units are different;

[0022] When storing force, the movable parts in different groups of the power-assisting units rotate synchronously along the first direction, so that the adapter part in each group of the power-assisting units slides along the corresponding second combining part, and the adapter part in each group of the power-assisting units slides in turn until it abuts against the corresponding pushing part, and the pushing part in each group of the power-assisting units drives the corresponding conversion structure to rotate through the adapter part in turn, thereby pulling the corresponding elastic part through the corresponding conversion structure to cause it to deform, and when the adapter parts in different groups of the power-assisting units reach the predetermined position in turn, the adapter parts in the corresponding power-assisting units disengage from the corresponding pushing part in turn, and cooperate with the corresponding first combining part under the action of the corresponding movable parts, until the elastic parts of each group of the power-assisting units enter the energy storage state in turn;

[0023] When releasing energy, the movable parts in different groups of the power-assisting units rotate synchronously in the opposite direction of the first direction. When the movable parts in each group of the power-assisting units reach the predetermined positions in turn, the adapter parts in each group of the power-assisting units disengage from the corresponding first combining parts in turn, and cooperate with the corresponding second combining parts again, and abut against the corresponding pushing parts. The corresponding elastic parts act on the corresponding pushing parts through the corresponding adapter parts, thereby driving the movable parts to continue to rotate in the opposite direction of the first direction until the elastic parts in each stage of the accumulator return to their initial state.

[0024] As a third aspect of the present invention, a photovoltaic tracking system includes the energy accumulator as described above or the multi-stage energy accumulator as described above.

[0025] The advantages of the present invention are: high safety, high degree of automation, strong practicality, effective cost reduction, and greater environmental protection.

[0026] First, in the accumulator proposed by the present invention, when the center of gravity of the load moves from a high position to a low position (i.e., the movable member rotates in the first direction), the adapter portion cooperates with the second coupling portion under the abutment of the fixed member. Under the action of the adapter portion, the movable member drives the elastic member to deform, and the elastic member overcomes the effect of the gravity of the load on the transmission shaft when the center of gravity of the load moves from a high position to a low position, until the deformation of the elastic member reaches a predetermined value. Under the action of the movable member, the adapter portion separates from the second coupling portion and cooperates with the first coupling portion, thereby ensuring that the elastic member will not continue to deform, thereby ensuring safety and reliability.

[0027] When the center of gravity of the load moves from a low position to a high position (i.e., the movable part rotates in the opposite direction of the first direction) and reaches a predetermined position, with the cooperation of the fixing part, the adapter part disengages from the cooperation with the first coupling part and engages with the second coupling part again. The elastic part uses the stored elastic energy due to deformation to act on the movable part through the adapter part, and uses the elastic force generated by the deformation of the elastic part to assist the power source, which is beneficial to reducing the power of the power source, reducing costs and being more environmentally friendly.

[0028] Second, in the accumulator proposed by the present invention, whether the fixed part serves as the outer cylinder or the movable part serves as the outer cylinder, the structure is simple and can be processed from profiles. It can be formed by integral stretching, resulting in a simple manufacturing method. The outer cylinder manufactured using this profile is simpler and more efficient, effectively improving processing efficiency and reducing processing costs. When the movable part serves as the outer cylinder, a first end cap is provided at each end of the movable part; when the fixed part serves as the outer cylinder, a second end cap is provided at each end of the fixed part to seal the outer cylinder, protecting the power-assisting unit from external influences, thereby extending its service life. It also prevents accidental breakage and popping of the elastic part, which could cause accidental injury, thereby ensuring safety.

[0029] Third, when the movable part is placed in the fixed part, the external load drives the movable part to rotate through the central axis. At the same time, a first slide, a second slide and a pushing part are set on the movable part. When the external load drives the movable part to rotate relative to the fixed part, the adapter part cooperates with the first slide under the abutment of the fixed part. When it rotates to the pushing part, the elastic part is driven to deform through the pushing part, that is, the adapter part cooperates with the second combining part; when it rotates to the second slide, the pushing part cooperates with the first combining part on the fixed part. Therefore, during the operation of the accumulator, the switching between the cooperation of the adapter part and the first combining part or the second combining part does not require human intervention, so it has a high degree of automation and strong practicality.

[0030] Fourth, when installing the power-assisting unit proposed in the present invention, the elastic member is set on the connecting seat, and the other end of the elastic member is connected to the connecting seat. One end of the elastic member is pre-tightened. After being pre-tightened to adapt to the external load, one end of the elastic member is hung on the hanging part. When the power-assisting unit is installed in the outer cylinder composed of the fixed part or the movable part, one end of the elastic member is connected to the outer cylinder. The assembly process is simple and quick, which improves the assembly efficiency and makes the pre-tightened accumulator more adaptable to the external load.

[0031] Fifth, a first elastic member is provided on the first frame at one end of the movable member, and a second elastic member is provided on the second frame at the other end. During the operation of the accumulator, when the external load drives the elastic member to deform through the conversion structure, the first elastic member and the second elastic member are deformed at the same time, so that the force on the conversion structure is more balanced; this avoids the problem that the conversion structure is offset due to uneven force, resulting in the axis of the conversion structure being inconsistent with the axis of the central axis, and the friction of the conversion structure increasing when the conversion structure rotates around the central axis; therefore, in the accumulator proposed by the present invention, the force on the conversion structure is more balanced, thereby improving the working efficiency of the accumulator.

[0032] Sixth, when the adapter and the elastic member are arranged in sequence along the radial direction of the fixed member, the axial dimension of the accumulator can be smaller, especially when multiple groups of power-assisting units are set, saving the axial space of the accumulator; when the adapter and the elastic member are arranged in sequence along the axial direction of the fixed member, the radial dimension of the accumulator can be smaller, saving the radial space of the accumulator; different setting methods can be selected according to different usage scenarios.

[0033] Seventh, the adapter is in the shape of an arc strip, which is more adapted to the motion trajectory of the conversion structure, and the first combining shaft protrudes from the inner arc surface of the adapter, and the second combining shaft protrudes from the outer arc surface of the adapter, which facilitates the adapter to cooperate with the first combining shaft and the second combining shaft; the thickness of the hinge part in the adapter is not greater than the length of the first combining shaft and / or the second combining shaft, so that the adapter increases the axial size of the first combining shaft and the second combining shaft while ensuring the swing flexibility, so that when the adapter cooperates with the outside through the first combining shaft and the second combining shaft, the contact area between the first combining shaft and the second combining shaft and the outside is increased, the pressure on the adapter is reduced, and the damage to the adapter is avoided, thereby increasing the service life of the adapter.

[0034] Eighth, the arc length of the adapter part from the pushing part in the second joint part in each group of power-assisting units is different. As the load rotates, the adapter part in each group of power-assisting units slides on the first slide on the movable part under the abutment of the fixed part. The adapter part in each group of power-assisting units slides in sequence according to the predetermined trajectory until it abuts against the pushing part, and drives the corresponding elastic part to deform through the corresponding pushing part, thereby realizing that the auxiliary power source overcomes the effect of the gravity of the load on the rotating shaft when the center of gravity of the load moves from a high place to a low place. When the load rotates to a predetermined position and the deformation of the elastic part reaches a predetermined value, the adapter part sequentially separates from the first slide and enters the second slide according to the predetermined trajectory. At the same time, the adapter part cooperates with the first joint part to ensure that the elastic part will not continue to deform, so that the various levels of energy accumulators in the multi-stage accumulator act on different angles of rotation of the load, thereby realizing the maximum auxiliary power source to overcome the influence of the change in the center of gravity position of the load on the torque demand of the power source. Therefore, a smaller power source can be selected, which not only reduces cost but also reduces energy consumption, that is, it is more economical and environmentally friendly, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The following figures describe in detail exemplary embodiments disclosed in this application. Identical reference numerals denote similar structures in several views of the drawings. Those skilled in the art will appreciate that these embodiments are non-limiting, exemplary embodiments, and that the drawings are for illustration and description purposes only and are not intended to limit the scope of this application. Other embodiments may also accomplish the same purpose of this application. It should be understood that the drawings are not drawn to scale. Among them:

[0036] FIG1 is a schematic diagram of a first embodiment of an accumulator in an embodiment of the present application;

[0037] FIG2 is an explosion diagram of FIG1 ;

[0038] FIG3 is a schematic diagram of a second embodiment of an accumulator in an embodiment of the present application;

[0039] FIG4 is a schematic diagram of point B in FIG3 ;

[0040] FIG5 is a schematic diagram of the explosion at point B in FIG4 ;

[0041] FIG6 is a cross-sectional schematic diagram of FIG3

[0042] FIG7 is a perspective schematic diagram of the adapter portion in FIG4 ;

[0043] FIG8 is a schematic top view of FIG7 ;

[0044] FIG9 is a schematic diagram of a third embodiment of the connection between the adapter and the elastic member in the accumulator of the present application;

[0045] FIG10 is a schematic diagram of the power-assisting unit in FIG9 ;

[0046] FIG11 is a cross-sectional schematic diagram of the accumulator in the initial state when the fourth embodiment is adopted between the adapter portion and the elastic member of the accumulator of the present application;

[0047] 12 is a cross-sectional schematic diagram of the accumulator in the present application in a state of storing energy when the fourth embodiment is adopted between the adapter portion and the elastic member;

[0048] FIG13 is an exploded schematic diagram of the fixing member and the power-assisting unit in FIG11 and FIG12 ;

[0049] FIG14 is an exploded diagram of a multi-stage accumulator according to an embodiment of the present application;

[0050] FIG15 is a cross-sectional schematic diagram of a multi-stage accumulator in an embodiment of the present application.

[0051] The marks in the figure are:

[0052] 100. Accumulator;

[0053] 1. First end cover;

[0054] 2. Movable member; 21. Second joint; 211. Pushing portion; 212. First slideway; 22. Second slideway;

[0055] 3. Fixing member; 31. First joint;

[0056] 4. Power-assisting unit; 41. Elastic member; 411. First elastic member; 412. Second elastic member; 42. Conversion structure; 421. Adapter; 4211. Hinge; 4212. First coupling shaft; 4213. Second coupling shaft; 422. Follower; 4221. Connecting seat; 4222. Hanging portion; 4223. First frame; 4224. Second frame;

[0057] 5. Bearings;

[0058] 6. Second end cover;

[0059] 7. Central axis;

[0060] 200. Multi-stage accumulator. DETAILED DESCRIPTION

[0061] In order to make the purpose, 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 in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. It is understood that, in the absence of conflict, some technical means of the various embodiments described herein can be replaced or combined with each other.

[0062] In the description of this application, if the terms "first," "second," etc. appear, they are used solely to distinguish the objects being described and do not convey any order or technical meaning. Therefore, an object defined as "first," "second," etc. may explicitly or implicitly include one or more of such objects. Furthermore, "a" or "an," and similar terms, do not indicate a quantitative limitation, but rather indicate the presence of at least one, and "plurality" means at least two.

[0063] In order to use the same reference numerals for the same technical features in this application, the reference numerals in FIG. 1 to FIG. 15 have been adaptively adjusted. A first aspect of this embodiment discloses an accumulator, comprising:

[0064] A fixing member 3, wherein the fixing member 3 is provided with a first coupling portion 31;

[0065] The movable member 2 is connected to the external load and forms a rotational fit with the fixed member 3. The movable member 2 is provided with a second coupling portion 21;

[0066] The power-assisting unit 4 includes:

[0067] The elastic member 41 is provided between the movable member 2 and the fixed member 3, and one end of the elastic member 41 is connected to the fixed member 3.

[0068] A conversion structure 42 is provided at the other end of the elastic member 41 . The conversion structure 42 is located between the movable member 2 and the fixed member 3 . The conversion structure 42 includes a connecting portion 421 .

[0069] In the initial state, under the contact of the fixing member 3, the adapter portion 421 cooperates with the second coupling portion 21;

[0070] When accumulating force, the movable member 2 rotates in the first direction, driving the conversion portion to rotate via the second coupling portion 21, thereby pulling the elastic member 41 via the conversion structure 42 to deform it; when the predetermined position is reached and the deformation of the elastic member 41 reaches a predetermined value, the adapter portion 421 separates from the second coupling portion 21 and, under the action of the movable member 2, cooperates with the first coupling portion 31, and the elastic member 41 is in an energy-accumulating state;

[0071] When releasing energy, the movable part 2 rotates in the opposite direction of the first direction. When it reaches a predetermined position, the adapter part 421 disengages from the first coupling part 31 and engages with the second coupling part 21 again. The elastic force of the elastic part 41 acts on the second coupling part 21 through the adapter part 421, thereby driving the movable part 2 to continue rotating in the opposite direction of the first direction until the elastic part 41 returns to its initial state.

[0072] It should be noted that, in this embodiment, both the fixed part 3 and the movable part 2 are connected to the external structure, wherein the fixed part 3 is connected to the external fixed structure, and the movable part 2 is connected to the external load, and a rotational fit is formed between the two.

[0073] Among them, the function of the fixing part 3 is to be connected to one end of the elastic part 41, and to provide a first coupling part 31 that can be used to cooperate with the adapter part 421. When the adapter part 421 cooperates with the first coupling part 31, the fixing part 3 is simultaneously connected to both ends of the elastic part 41 through the conversion structure 42 to maintain the deformation state of the elastic part 41; the function of the movable part 2 is to provide a second coupling part 21 that can cooperate with the adapter part 421. When the adapter part 421 cooperates with the second coupling part 21, the movable part 2 is connected to the other end of the elastic part 41 through the conversion structure 42.

[0074] At the same time, the fixed part 3 and the movable part 2 are also used to form a space for accommodating the power-assisting unit 4, so that under the action of the fixed part 3 and the movable part 2, the adapter part 421 of the power-assisting unit 4 cooperates with the first combining part 31 or the second combining part 21.

[0075] Furthermore, since the fixed member 3 and the movable member 2 rotate relative to each other, in this embodiment, on the basis of satisfying the action of the fixed member 3 and the movable member 2, in order to achieve rotational cooperation between the fixed member 3 and the movable member 2, their positional relationship includes at least the following two implementations:

[0076] In the first embodiment, with reference to priority documents CN2024102030819, CN2024203403713, and CN2024203403696, to unify the names of the technical features of this application, the active member in priority document CN2024102030819 is referred to as the movable member 2 in this application. As shown in Figures 1 and 2, the movable member 2 is cylindrical, the fixed member 3 is disposed in the cylindrical movable member 2, the power-assisting unit 4 is disposed between the movable member 2 and the fixed member 3, the second coupling portion 21 is a first groove provided on the inner circumference of the cylindrical movable member 2, and the first coupling portion 31 is a second groove provided on the outer circumference of the fixed member 3.

[0077] Furthermore, in this embodiment, in order to increase the safety of the movable part 2, a first end cover 1 is connected to both ends of the movable part 2, and the fixing part 3 forms a rotational fit with the movable part 2 through the first end cover 1; under the action of the first end cover 1, the cylindrical cavity of the movable part 2 is closed to prevent the power assist unit 4 from being affected by the outside world, and can also prevent the elastic part 41 from accidentally breaking and popping out to cause accidental injuries.

[0078] In the second embodiment, with reference to priority documents CN202422713215X, CN202422713222X, and CN2024227132200, in order to unify the names of the technical features of this application, the active member in the corresponding priority documents is referred to as the movable member 2, the retaining frame is referred to as the driven member 422, the adapter is referred to as the adapter portion 421, the retaining groove is referred to as the first coupling portion 31, and the avoidance groove is referred to as the second coupling portion 21. As shown in Figures 3 to 6, unlike the first embodiment described above, in this embodiment, the fixing member 3 is cylindrical, the power-assisting unit 4 and the movable member 2 are both provided in the cylindrical fixing member 3, and the first coupling portion 31 is a third groove on the inner circumference of the cylindrical fixing member 3 or a notch penetrating the cylindrical wall.

[0079] Furthermore, in this embodiment, in order to increase the safety of the fixing part 3, a second end cover 6 is connected to both ends of the fixing part 3, and the second end cover 6 is used to close the through cavity, and the fixing part 3 is rotated together with the movable part 2 through the second end cover 6; under the action of the second end cover 6, the through cavity of the fixing part 3 is closed to prevent the power assist unit 4 from being affected by the outside world, and to prevent the elastic part 41 from accidentally breaking and bursting to cause accidental injuries.

[0080] In this embodiment, when the fixing member 3 is cylindrical, the movable member 2 is placed in the fixing member 3, and the second coupling portion 21 is a groove or depression provided on the outer circumferential surface of the movable member 2. It should be understood that the groove or depression serving as the second coupling portion 21 can just accommodate the adapter portion 421. If the groove or depression serving as the second coupling portion 21 increases in size in the circumferential direction of the movable member 2, then the groove wall on one side of the groove or depression is the pushing portion 211, the groove bottom or the bottom of the depression is the first slide 212, and the circumferential surface of the movable member 2 is the second slide 22. Obviously, in the radial direction of the movable member 2, the radial size of the groove bottom or the bottom of the depression on the outer circumferential surface is smaller than the radial size of the corresponding groove or depression. directional dimension. At this time, when the bottom of the groove or the bottom of the depression is directly regarded as the circumferential surface of the movable part 2, it can be expressed as a pushing portion 211, a first slide 212 and a second slide 22 are sequentially provided on the circumferential surface of the movable part 2, the arc radius of the first slide 212 is smaller than the arc radius of the second slide 22, one end of the pushing portion 211 is connected to one end of the first slide 212, and the other end is connected to one end of the second slide 22, and the other end of the first slide 212 is connected to the other end of the second slide 22; when the first slide 212 is provided, the line where the arc center of the first slide 212 is located coincides with the line where the arc center of the second slide 22 is located.

[0081] Furthermore, in this embodiment, in order to facilitate the connection between the movable part 2 and the external load, a through hole passing through the movable part 2 is provided at the position of the line where the arc center of the first slide 212 is located, and a central shaft 7 is passed through the through hole. The movable part 2 is connected to the central shaft 7, and the central shaft 7 is used to be connected to the external load. The movable part 2 forms a rotational fit with the fixed part 3 through the central shaft 7.

[0082] It should be noted that in this embodiment, as shown in Figures 1 and 13, the number of power-assisting units 4 can be one or more than two. When the number of power-assisting units 4 is two or more, the multiple groups of power-assisting units 4 are coaxially arranged. When the multiple groups of power-assisting units 4 are coaxially arranged, in order to maintain a certain distance between the multiple groups of power-assisting units 4 and to avoid mutual interference between the multiple groups of power-assisting units 4 and to ensure the stability and reliability of the power-assisting units 4, a spacing structure is provided between adjacent power-assisting units 4, such as a bearing 5 for spacing the power-assisting units 4. The spacing structure can also be provided between the power-assisting units 4 and the first end cover 1 or the second end cover 6.

[0083] Furthermore, in this embodiment, according to the different number of power-assisting units 4 and the different positional relationships between the movable member 2 and the fixed member 3, the specific structures of the corresponding components may also be different. Specifically:

[0084] 1. When the movable member 2 is an outer cylinder, the movable member 2 can be integrally formed or connected to form a plurality of movable members 2, the number of which matches the number of power-assisting units 4. Similarly, the fixed member 3 can be integrally formed and directly connected to the external fixed structure, with a first engaging portion 31 provided at a corresponding position of each group of power-assisting units 4. Alternatively, when the first engaging portion 31 is a groove, a second through-groove is formed on the outer wall of the fixed member 3 to mate with the adapter portion 421. Alternatively, each group of power-assisting units 4 corresponds to a separate fixed member 3, with a through-hole provided in the fixed member 3, through which the central shaft 7 is sequentially passed, thereby connecting the fixed member 3 to the external fixed structure via the central shaft 7.

[0085] 2. When the fixing part 3 is an outer cylinder, the fixing part 3 can be an integrally formed setting, or it can be composed of multiple fixing parts 3 that are the same in number as the power-assisting units 4; similarly, the movable part 2 can be an integrally formed design, directly connected to the external load, and a second connecting portion 21 is provided at the corresponding position of each group of power-assisting units 4; or each group of power-assisting units 4 corresponds to a separate movable part 2, and the central shaft 7 is used to pass through the through holes on the movable part 2 in sequence, so that the movable part 2 is connected to the external load through the central shaft 7.

[0086] It should be noted that, in this embodiment, the elastic member 41 shown is a flat scroll spring; it should be understood that, in this application, the elastic member 41 refers to a member that can be deformed under the action of an external force, and as the elastic member 41 is deformed, it has a tendency to recover to its shape before being acted upon by the external force, and when the elastic member 41 has a tendency to recover to its shape before being acted upon by the external force, it can apply a force to an external component, that is, in this embodiment, the elastic member 41 is used to overcome the force of the load on the transmission shaft, and can assist the power source to drive the load to perform the desired movement through the transmission shaft; therefore, although a flat scroll spring is shown in the drawings of this embodiment, in fact, the elastic member 41 can also be a coil spring, a torsion spring, a tension spring, etc., or a member of other shapes made of elastic materials such as rubber that can meet the requirements of the booster proposed in this application, or a combination of coil springs, torsion springs, tension springs or other elastic members.

[0087] It should be noted that, in this embodiment, the function of the conversion structure 42 is to be connected to the other end of the elastic member 41, and to cooperate with the fixing member 3 to play a certain limiting role in the deformation trajectory of the elastic member 41, and to set the adapter portion 421. The function of the adapter portion 421 is to cooperate with the first coupling portion 31 of the fixing member 3 or the second coupling portion 21 of the movable member 2.

[0088] Furthermore, in this embodiment, as shown in Figures 4 to 13 , in addition to satisfying the requirements of the conversion structure 42, the conversion structure 42 further includes a follower 422, the follower 422 being rotationally engaged with the movable member 2 and / or the fixed member 3, and the adapter 421 being hingedly connected to the follower 422. While satisfying the basic function of the follower 422, those skilled in the art can make corresponding changes to the specific shape of the follower 422, for example, configuring the follower 422 to be disc-shaped, fan-shaped, I-shaped, V-shaped, Y-shaped, or X-shaped.

[0089] As shown in Figures 4 and 5, in order to facilitate the setting of the elastic member 41 and to facilitate the pre-tightening of the elastic member 41, the follower 422 is provided with a hanging portion 4222 for hanging one end of the elastic member 41, and the follower 422 is provided with a connecting seat 4221 for connecting the other end of the elastic member 41. When the power-assisting unit 4 is installed, the other end of the elastic member 41 is connected to the connecting seat 4221, and pre-tightened through one end of the elastic member 41. After pre-tightening to adapt to the external load, one end of the elastic member 41 is hung on the hanging portion 4222. When the power-assisting unit 4 is installed in the outer cylinder formed by the fixed member 3 or the movable member 2, one end of the elastic member 41 is connected to the outer cylinder.

[0090] In this embodiment, the hooking portion 4222 is formed by extending from one end of the follower 422 away from the movable member 2 along the axial direction of the movable member 2 in a direction away from the movable member 2 .

[0091] In addition, in this embodiment, the connecting seat 4221 is used to connect the other end of the elastic member 41. On the basis of satisfying the effect of the connecting seat 4221, as shown in Figures 4 and 5, the connecting seat 4221 is formed from the end of the follower 422 away from the movable member 2, and extends along the axial direction of the movable member 2 in the direction away from the movable member 2; in order to avoid squeezing the movable member 2 during the deformation of the elastic member 41, thereby affecting the external load to drive the movable member 2 to rotate, the connecting seat 4221 can also be annular, and the inner ring surface of the annular connecting seat 4221 coincides with the inner wall surface of the through hole of the movable member 2. In order to facilitate the connection of the other end of the elastic member 41, a hanging interface is provided on the annular connecting seat 4221 or a hanging groove is provided on its outer wall surface.

[0092] Furthermore, in this embodiment, as shown in Figures 4 and 5, in order to make the conversion structure 42 bear more balanced force, or in other words, to make the follower 422 bear more balanced force, the follower 422 includes a first frame 4223 and a second frame 4224, the first frame 4223 is arranged at one end of the movable part 2, and the second frame 4224 is arranged at the other end of the movable part 2, and the first frame 4223 is connected to the second frame 4224.

[0093] Furthermore, in this embodiment, the elastic member 41 includes a first elastic member 411 and a second elastic member 412, the first elastic member 411 is arranged on the first frame 4223, and the second elastic member 412 is arranged on the second frame 4224; when the external load drives the elastic member 41 to deform through the conversion structure 42, the first elastic member 411 and the second elastic member 412 are deformed at the same time, so that the follower 422 is evenly stressed and can rotate stably around the rotation axis.

[0094] It should be noted that, in this embodiment, the positions of the adapter 421 and the elastic member 41 may be adjusted differently according to different specific scenarios in which the accumulator is used, so as to meet different application requirements. Specifically:

[0095] As a third implementation of this embodiment, as shown in Figures 4 to 6, 9 and 10, in order to minimize the radial size of the accumulator 100, the adapter portion 421 and the elastic member 41 can be arranged sequentially along the axial direction of the fixing member 3. In this case, the radial size of the accumulator 100 is only limited by the size of the elastic member 41. Therefore, the radial size of the accumulator 100 can be minimized to meet the requirements of applying the accumulator 100 proposed in this embodiment to a relatively narrow space along the radial direction of the accumulator 100.

[0096] As a fourth implementation of this embodiment, as shown in Figures 11 to 13, when the purpose is to minimize the axial size of the accumulator 100, the adapter portion 421 and the elastic member 41 can be arranged sequentially along the radial direction of the fixing member 3. In this case, the axial size of the accumulator 100 is reduced by at least the size of the adapter portion 421. Therefore, the axial size of the accumulator 100 can be reduced to meet the requirements of applying the accumulator 100 proposed in this embodiment to a relatively narrow space along the radial direction of the accumulator 100.

[0097] It should be noted that the third and fourth embodiments of this embodiment are both applicable to the aforementioned first and second embodiments, that is, the third embodiment is applicable to both the first and second embodiments, and similarly, the fourth embodiment is applicable to both the first and second embodiments.

[0098] It should be noted that, in this embodiment, on the basis of satisfying the function of the adapter 421, the adapter 421 includes but is not limited to the following implementations:

[0099] The first one is that the contact surface between the adapter 421 and the fixed part 3 or the movable part 2 is a smooth curved surface, or the adapter 421 contacts the fixed part 3 or the movable part 2 through rollers and / or balls; the adapter 421 is provided with rolling bearings 5 ​​at the contact positions with the fixed part 3 and the movable part 2.

[0100] The second type is that the adapter 421 is a ball, roller or rolling bearing 5, which is slidingly connected to the follower 422 through the rotating shaft of the ball, roller or rolling bearing 5. The adapter 421 uses the ball or roller to move linearly between the movable part 2 and the fixed part 3.

[0101] The third type, as shown in Figures 7 and 8, is that the adapter portion 421 is in the shape of an arc strip, with one end of the adapter portion 421 being a hinge portion 4211. The other end of the adapter portion 421 is hingedly connected to a first coupling shaft 4212, which protrudes from the outer arc surface of the adapter portion 421. The adapter portion 421 is also hingedly connected to a second coupling shaft 4213, which protrudes from the inner arc surface of the adapter portion 421. To increase the service life of the adapter portion 421, the thickness of the hinge portion 4211 in the adapter portion 421 is no greater than the length of the first coupling shaft 4212 and / or the second coupling shaft 4213.

[0102] As shown in Figures 14 and 15, as a second aspect of this embodiment, a multi-stage accumulator is disclosed. It should be noted that in this application, the retaining groove in priority document CN202410462407X is referred to as the first coupling portion 31, and the avoidance groove is referred to as the second coupling portion 21. The multi-stage accumulator disclosed in this embodiment includes the accumulator 100 as described above, and differs from the accumulator 100 described above in that:

[0103] The number of the power-assisting units 4 is two or more, and the multiple groups of the power-assisting units 4 are coaxially arranged;

[0104] In the initial state, under the contact of the fixing member 3, the adapter portion 421 of each group of the power-assisting units 4 cooperates with the second coupling portion 21, and the arc lengths of the adapter portion 421 from the pushing portion 211 of the second coupling portion 21 in each group of the power-assisting units 4 are different;

[0105] When storing power, the movable parts 2 in different groups of the power-assisting units 4 rotate synchronously along the first direction, so that the adapter part 421 in each group of the power-assisting units 4 slides along the corresponding second combining part 21, and the adapter part 421 in each group of the power-assisting units 4 slides in turn until it abuts against the corresponding pushing part 211, and the pushing part 211 in each group of the power-assisting units 4 drives the corresponding conversion structure 42 to rotate through the adapter part 421 in turn, thereby pulling the corresponding elastic member 41 through the corresponding conversion structure 42 to cause it to deform, and when the adapter parts 421 in different groups of the power-assisting units 4 reach the predetermined position in turn, the adapter parts 421 in the corresponding power-assisting units 4 disengage from the corresponding pushing part 211 in turn, and cooperate with the corresponding first combining part 31 under the action of the corresponding movable part 2, until the elastic member 41 in each group of the power-assisting units 4 enters the energy storing state in turn;

[0106] When releasing energy, the movable parts 2 in different groups of the power-assisting units 4 rotate synchronously in the opposite direction of the first direction. When the movable parts 2 in each group of the power-assisting units 4 reach the predetermined positions in turn, the adapter parts 421 in each group of the power-assisting units 4 disengage from the corresponding first combining parts 31 in turn, and cooperate with the corresponding second combining parts 21 again, and abut against the corresponding pushing parts 211. The corresponding elastic parts 41 act on the corresponding pushing parts 211 through the corresponding adapter parts 421, thereby driving the movable parts 2 to continue to rotate in the opposite direction of the first direction until the elastic parts 41 in each stage of the accumulator 100 are restored to their initial state.

[0107] It should be noted that, in this embodiment, in order to make the arc length of the adapter portion 421 in each group of the power-assisting units 4 from the pushing portion 211 in the second coupling portion 21 different, taking the embodiment in which the fixed member 3 is an outer cylinder and the circumferential surface of the movable member 2 is provided with the pushing portion 211, the first slideway 212 and the second slideway 22 as an example, this can be achieved in the following manner:

[0108] In a first implementation method, the arc lengths of the first slides 212 in different groups of power-assisting units 4 increase successively, and the adapter portion 421 corresponding to each group of the power-assisting units 4 is placed in the corresponding first slide 212 at one end away from the pushing portion 211; preferably, different groups of power-assisting units 4 are alternately arranged left and right in the order of the arc lengths of their first slides 212, and in the initial state, the adapter portion 421 is located at the same axial position of the fixing member 3.

[0109] In the second implementation method, two arc lengths are set for the first slide 212 in different groups of power-assisting units 4. The first is that the arc length range of the first slide 212 exceeds 180° of the fixing member 3, and the second is that the arc length range of the avoidance groove is less than 180° of the fixing member 3. The corresponding adapter parts 421 in different groups of power-assisting units 4 are placed at different positions in the corresponding first slide 212, so that the arc lengths of the corresponding adapter parts 421 from the corresponding pushing parts 211 are not equal; similarly, different groups of power-assisting units 4 are alternately arranged left and right in the order of the arc lengths of the adapter parts 421 from the corresponding pushing parts 211.

[0110] A third aspect of the present embodiment discloses a photovoltaic tracking system, comprising the energy accumulator 100 as described above or the multi-stage energy accumulator 200 as described above.

Claims

1. Accumulator, characterized in that, include: A fixing member, wherein the fixing member is provided with a first coupling portion; A movable member is connected to the external load and forms a rotational fit with the fixed member, wherein the movable member is provided with a second coupling portion; A power-assisting unit, comprising: elastic parts; It is arranged between the movable part and the fixed part, and one end of the elastic part is connected to the fixed part. a conversion structure, provided at the other end of the elastic member, the conversion structure being located between the movable member and the fixed member, the conversion structure including a transition portion; In the initial state, under the contact of the fixing member, the transition portion cooperates with the second coupling portion; When accumulating force, the movable member rotates in the first direction, driving the conversion member to rotate via the second coupling portion, thereby pulling the elastic member through the conversion structure to cause it to deform; when the predetermined position is reached and the deformation of the elastic member reaches a predetermined value, the adapter portion separates from the second coupling portion and, under the action of the movable member, cooperates with the first coupling portion, and the elastic member is in an energy-accumulating state; When releasing energy, the movable part rotates in the opposite direction of the first direction. When reaching a predetermined position, the adapter part disengages from the first combining part and engages with the second combining part again. The elastic force of the elastic part acts on the second combining part through the adapter part, thereby driving the movable part to continue to rotate in the opposite direction of the first direction until the elastic part returns to its initial state.

2. The accumulator according to claim 1, characterized in that The movable part is cylindrical, the fixed part is inserted into the cylindrical movable part, the power-assisting unit is placed between the movable part and the fixed part, the second coupling portion is a first groove provided on the inner circumference of the cylindrical movable part, and the first coupling portion is a second groove provided on the outer circumference of the fixed part.

3. The accumulator according to claim 2, characterized in that Both ends of the movable member are connected to a first end cover, and the fixed member forms a rotational fit with the movable member through the first end cover.

4. The accumulator according to claim 1, characterized in that The fixing member is cylindrical, the power-assisting unit and the movable member are both arranged in the cylindrical fixing member, and the first coupling portion is a third groove on the inner circumference of the cylindrical fixing member or a notch penetrating the cylindrical wall.

5. The accumulator according to claim 4, characterized in that Both ends of the fixing member are connected with second end covers, the second end covers are used to close the through cavity, and the fixing member is rotatably matched with the movable member through the second end covers.

6. The accumulator according to claim 4, characterized in that The circumferential surface of the movable part is provided with a pushing part, a first slide and a second slide, the arc radius of the first slide is smaller than the arc radius of the second slide, one end of the pushing part is connected to one end of the first slide, and the other end is connected to one end of the second slide, and the other end of the first slide is connected to the other end of the second slide; the second connecting part is the pushing part and the first slide, and the line where the arc center of the first slide is located coincides with the line where the arc center of the second slide is located.

7. The accumulator according to claim 6, characterized in that A through hole is provided along the line where the arc center of the first slideway is located, and the through hole is provided with a central shaft. The movable part is connected to the central shaft, and the central shaft is used to be connected to an external load. The movable part forms a rotational fit with the fixed part through the central shaft.

8. The accumulator according to any one of claims 1 to 7, characterized in that: The conversion structure also includes a follower, which is in rotational cooperation with the movable part and / or the fixed part. The adapter is hinged to the follower. The follower is provided with a hanging part for hanging one end of the elastic part, and the follower is provided with a connecting seat for connecting the other end of the elastic part.

9. The accumulator according to claim 8, characterized in that: The connecting seat starts from one end of the driven member away from the movable member and extends along the axial direction of the movable member in a direction away from the movable member. The connecting seat is annular and has a hanging interface or a hanging groove on the outer wall of the connecting seat.

10. The accumulator according to claim 8, characterized in that: The driven member includes a first frame and a second frame. The first frame is arranged at one end of the movable member, and the second frame is arranged at the other end of the movable member. The first frame is connected to the second frame.

11. The accumulator according to claim 10, characterized in that: The elastic member includes a first elastic member and a second elastic member. The first elastic member is arranged on the first frame, and the second elastic member is arranged on the second frame.

12. The accumulator according to any one of claims 1 to 7, characterized in that: The adapter portion and the elastic member are sequentially arranged along the radial direction of the fixing member. Alternatively, the adapter portion and the elastic member are arranged in sequence along the axial direction of the fixing member.

13. The accumulator according to any one of claims 1 to 7, characterized in that: The adapter part is in the shape of an arc strip, one end of the adapter part is a hinge part, the other end of the adapter part is hinged with a first coupling shaft, the first coupling shaft protrudes from the outer arc surface of the adapter part, and the adapter part is also hinged with a second coupling shaft, the second coupling shaft protrudes from the inner arc surface of the adapter part.

14. The accumulator according to claim 13, characterized in that The thickness of the hinge portion in the transition portion is not greater than the length of the first coupling shaft and / or the second coupling shaft.

15. Multi-stage accumulator, characterized in that, The accumulator comprises the accumulator according to any one of claims 1 to 14, wherein the number of the power-assisting units is two or more, and the multiple groups of the power-assisting units are coaxially arranged; In the initial state, under the contact of the fixing member, the adapter portion of each group of the power-assisting units cooperates with the second coupling portion, and the arc lengths between the adapter portion and the pushing portion of the second coupling portion in each group of the power-assisting units are different; When storing force, the movable parts in different groups of the power-assisting units rotate synchronously along the first direction, so that the adapter part in each group of the power-assisting units slides along the corresponding second combining part, and the adapter part in each group of the power-assisting units slides in turn until it abuts against the corresponding pushing part, and the pushing part in each group of the power-assisting units drives the corresponding conversion structure to rotate through the adapter part in turn, thereby pulling the corresponding elastic part through the corresponding conversion structure to cause it to deform, and when the adapter parts in different groups of the power-assisting units reach the predetermined position in turn, the adapter parts in the corresponding power-assisting units disengage from the corresponding pushing part in turn, and cooperate with the corresponding first combining part under the action of the corresponding movable parts, until the elastic parts of each group of the power-assisting units enter the energy storage state in turn; When releasing energy, the movable parts in different groups of the power-assisting units rotate synchronously in the opposite direction of the first direction. When the movable parts in each group of the power-assisting units reach the predetermined positions in turn, the adapter parts in each group of the power-assisting units disengage from the corresponding first combining parts in turn, and cooperate with the corresponding second combining parts again, and abut against the corresponding pushing parts. The corresponding elastic parts act on the corresponding pushing parts through the corresponding adapter parts, thereby driving the movable parts to continue to rotate in the opposite direction of the first direction until the elastic parts in each stage of the accumulator return to their initial state.

16. Photovoltaic tracking system, characterized in that, The device comprises the accumulator according to any one of claims 1 to 14 or the multi-stage accumulator according to claim 15.

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