Screw transmission assembly and solar device

Abstract

The invention relates to the field of mechanical transmission, in particular to a spiral transmission assembly which comprises a center shaft, at least two sets of transmission nuts, at least one driving part, a transmission sleeve and a spiral spline pair. The at least two groups of transmission nuts are coaxially sleeved on the central shaft; the driving part is used for driving the transmission nut to synchronously move along the axis of the center shaft under the limitation of the center shaft. And at least two groups of transmission nuts are sleeved in the transmission sleeve. The spiral spline pairs are arranged on the transmission nut and the transmission sleeve respectively and / or arranged on the center shaft and the transmission nut respectively. When the transmission nut is driven by the driving part and moves under the limitation of the center shaft, the transmission sleeve rotates around the axis of the transmission sleeve, and the center shaft is in spiral transmission fit with the transmission nut, or the transmission nut is in spiral transmission fit with the transmission sleeve. Finally, the solar device is provided according to the spiral transmission assembly. The spiral spline has the beneficial effects that the spiral transmission stability is improved while the transmission gap of the spiral spline is reduced.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission, and more particularly to a screw transmission assembly and a solar energy device. Background Technology

[0002] In mechanical transmission, large-lead helical drive components are difficult to widely apply due to the high difficulty in machining their inner helix. Large-lead helical drive components (e.g., helix angle less than 45 degrees) have the least impact on the power source when subjected to external forces at the load end. Therefore, in outdoor fields such as photovoltaic tracking and rotating advertising, the application of large-lead helical drive components can better protect the power source.

[0003] Due to the high difficulty in machining the internal helix, the machining accuracy cannot be guaranteed, and the helix mating part is prone to interference, resulting in a reduction in transmission efficiency. Therefore, when manufacturing helix transmission components, negative tolerances are usually set for the helix part, which in turn leads to gaps in the helix mating part, resulting in a reduction in transmission accuracy. Furthermore, when the load is suddenly affected by natural environmental factors such as wind, the helix part is prone to impact, which can cause damage or even destruction to the transmission component.

[0004] Designing a structure that can reduce the transmission backlash of a screw drive assembly has become an urgent technical problem to be solved. Summary of the Invention

[0005] This invention first proposes a screw drive assembly to solve the problems of low transmission efficiency or low transmission accuracy of existing screw drive assemblies; secondly, this invention proposes a solar energy device.

[0006] As a first aspect of the present invention, a helical drive assembly is provided, comprising:

[0007] Central axis,

[0008] At least two sets of transmission nuts, both of which are located on the central shaft;

[0009] At least one driving element is used to drive the transmission nut to move synchronously along the axis of the central shaft under the constraint of the central shaft;

[0010] A transmission sleeve is fitted onto the outer circumferential surface of the at least two sets of transmission nuts;

[0011] The spiral spline pair is respectively disposed on the transmission nut and the transmission sleeve, and / or respectively disposed on the central shaft and the transmission nut.

[0012] When the driving component drives the transmission nut to move, the transmission sleeve and the central shaft rotate relative to each other under the action of the spiral spline pair.

[0013] Preferably, the helical spline pair includes a first helical spline disposed on the outer peripheral surface of the central shaft, and a second helical spline disposed on the inner peripheral surface of the transmission nut that cooperates with the first helical spline. When the driving member drives the transmission nut to move linearly and the transmission sleeve is fixed, the linear movement of the transmission nut on the central shaft causes the central shaft to rotate.

[0014] or,

[0015] The spiral spline pair includes a third spiral spline on the outer circumferential surface of the transmission nut and a fourth spiral spline on the inner circumferential surface of the transmission sleeve that mates with the third spiral spline. When the driving member drives the transmission nut to move linearly and the central shaft is fixed, the linear movement of the transmission nut on the central shaft causes the transmission sleeve to rotate relative to it.

[0016] Preferably, when the inner circumferential surface of the transmission nut is provided with the second helical spline, the inner circumferential surface of the transmission sleeve is provided with the first straight guide, and the outer circumferential surface of the transmission nut is provided with the second straight guide that cooperates with the first straight guide;

[0017] When the outer circumferential surface of the transmission nut is provided with the third spiral spline, the inner circumferential surface of the transmission nut is provided with the third straight guide, and the outer circumferential surface of the central shaft is provided with the fourth straight guide that cooperates with the third straight guide.

[0018] Preferably, the driving component includes a lead screw and a lead screw nut that cooperates with the lead screw;

[0019] The central shaft has a cavity extending along the axial direction inside, and the side wall of the cavity has a strip-shaped through hole. The lead screw and the lead screw nut are located in the cavity.

[0020] It also includes a first connector, which is movably disposed in the strip-shaped through hole, and the lead screw nut is connected to at least one of the transmission nuts through the first connector.

[0021] Preferably, a set of lead screw nuts, a set of transmission nuts, and a first connecting member connecting the lead screw nut and the transmission nuts constitute a set of axial motion components, including at least two sets of axial motion components. The lead screw is provided with a first thread and a second thread with opposite helical directions in the length direction. When the lead screw rotates, the axial motion component that cooperates with the first thread and the axial motion component that cooperates with the second thread move away from each other or move closer together.

[0022] Preferably, when the outer circumferential surface of the transmission nut is provided with a third helical spline, the transmission sleeve is composed of at least two unit sleeves fixedly connected together, and the helical direction of the fourth helical spline provided on the inner circumferential surface of the transmission sleeve is adapted to the helical direction of the first thread and the second thread in the lead screw, and the helical direction of the fourth helical spline of adjacent unit sleeves is different.

[0023] Preferably, it further includes a second connector, which is connected to the first connector, and at least two sets of the transmission nuts are connected to the second connector.

[0024] Preferably, the driving component includes a threaded sleeve and a gear, the threaded sleeve being sleeved on the central shaft;

[0025] The outer circumferential surface of the threaded sleeve is provided with a third thread, and the two ends of the threaded sleeve are respectively connected to the transmission nut;

[0026] The inner circumferential surface of the gear is provided with a fourth thread that mates with the third thread, and the gear and the threaded sleeve are driven together by the fourth thread and the third thread.

[0027] The outer circumferential surface of the gear is provided with transmission teeth for transmission connection with an external power source.

[0028] When the gear rotates, it drives the threaded sleeve and the transmission nuts located at both ends of the threaded sleeve to move synchronously along the central axis.

[0029] Preferably, the transmission nut is provided with a first reference point, and the two ends of the threaded sleeve are provided with second reference points. The transmission nut and the threaded sleeve are positioned and connected through the first reference point and the second reference point.

[0030] Preferably, the transmission nut includes a first nut, a second nut, a first elastic element, a first guide element, and a first anti-loosening part.

[0031] The first nut and the second nut are coaxially arranged. The first nut is provided with a first guide rail portion, and the second nut is provided with a second guide rail portion. The first elastic element is disposed between the first nut and the second nut.

[0032] The first guide member includes at least one connection position for connecting with the active member; the first guide member passes through the first guide rail portion and the second guide rail portion in sequence, and is movably connected with the first nut and the second nut;

[0033] The first anti-detachment part is fixedly connected to the first bearing guide to limit the range of motion of the first nut and the second nut.

[0034] Preferably, the first bearing member is provided with a third guide rail portion near the axis of the transmission nut, the third guide rail portion is used to connect with the driving member, and the connection position is located on the third guide rail portion.

[0035] Preferably, when the driving component is a threaded sleeve and a gear, the first reference point is located on the bearing guide.

[0036] Preferably, it further includes at least one second elastic element, at least one second guide element, and a second anti-detachment part. The second guide element passes through the at least two sets of transmission nuts to make them slidably connected. The second anti-detachment part is fixedly connected to the second guide element, restricting the at least two sets of transmission nuts to move only within a certain range. The at least one second elastic element is disposed between the at least two transmission nuts and / or the at least one second elastic element is disposed between the transmission nut and the second anti-detachment part.

[0037] As a second aspect of the present invention, a solar energy device is provided, comprising the aforementioned helical drive assembly, and further comprising a light-receiving element and a column, wherein the helical drive assembly is connected to the light-receiving element and the column respectively.

[0038] The beneficial effects of this invention are as follows:

[0039] 1. The screw drive assembly proposed in this application is provided with at least two sets of drive nuts. When the at least two sets of drive nuts are screwed with the central shaft or the drive sleeve respectively, by adjusting the distance between the different sets of drive nuts (in the form of a second connecting piece or spring, etc.), it is achieved that one side of the helical spline on the drive sleeve and / or the central shaft abuts against the helical spline on one set of drive nuts, and the opposite side abuts against the helical spline on the other set of drive nuts. This reduces the processing requirements and makes the transmission of the screw drive assembly proposed in this application more stable and precise.

[0040] 2. During prolonged operation, the contact surfaces of the helical spline pair inevitably experience varying degrees of wear. By utilizing at least two sets of transmission nuts, the distance between these sets can be adjusted periodically or irregularly to eliminate gaps caused by wear, thereby extending the service life of the helical drive assembly proposed in this application. Furthermore, the aforementioned method of adjusting the spacing between different sets of transmission nuts allows for adjusting the length of the second connecting member or the form of a spring to reduce the transmission backlash of the helical drive assembly based on varying degrees of wear.

[0041] 3. When the driving element is a combination of a lead screw and a lead screw nut, a cavity extending along the axial direction can be provided inside the central shaft to accommodate the driving element, thereby making the overall screw transmission assembly proposed in this application more compact. Furthermore, using the lead screw and lead screw nut as the driving element, the threads on the lead screw can be set as a first thread and a second thread with opposite helical directions. This allows the transmission nut connected to the first thread and the transmission nut connected to the second thread to move in opposite directions when the lead screw rotates under the drive of an external power source, i.e., moving away from or towards each other. This makes the force between the central shaft, the transmission nut, and the transmission sleeve more uniform when the transmission sleeve and the central shaft rotate relative to each other, thus improving the transmission stability of the screw transmission assembly proposed in this application.

[0042] 4. When the driving element is a threaded sleeve and a gear, it is not necessary to have a cavity inside the central shaft to house the driving element. This ensures the stability and load-bearing capacity of the screw drive assembly proposed in this application, making it suitable for high-load working conditions. Furthermore, the size of the driving element is not limited by the hole inside the central shaft, which helps to increase the contact area during transmission, optimizes transmission efficiency, reduces friction loss, and further ensures the service life of the screw drive assembly proposed in this application. In addition, in some embodiments, the threaded sleeve and gear are positioned at the center of the threaded sleeve, thereby increasing the specific strength of the structure and ensuring more uniform force distribution and more stable movement during transmission.

[0043] 5. When the length of the screw drive assembly along the axis is large, at least two sets of spaced transmission nuts can support the various parts of the transmission sleeve and the central shaft along the axis, thus improving the stability of the overall structure.

[0044] 6. When the transmission nut is composed of at least a first nut, a second nut, a first elastic element, a first guide element, and a first anti-disengagement part, the first nut and the second nut in the same transmission nut can respectively abut against the helical spline provided on the central shaft and / or the transmission sleeve. That is, the single transmission nut also achieves the elimination of gaps, thereby further improving the transmission stability of the helical transmission assembly proposed in this application.

[0045] 7. Furthermore, when the load, such as a photovoltaic panel in a solar energy device, is affected by external factors such as wind, the moving end (e.g., a transmission sleeve) of the screw drive assembly proposed in this application is subjected to a force. The moving end of the screw drive assembly transmits the force to the sleeve, causing the first nut or second nut (or multiple transmission nuts) that abut against the moving end to tend to move axially. By setting a first elastic element between the first nut and the second nut, the load can move within an allowable range under the influence of external factors, reducing the risk of the load being damaged by external factors. It can also mitigate the impact of external factors on the power source used to drive the screw drive assembly proposed in this application. In other words, it can reduce the maintenance cost of the device (e.g., a solar energy device) using the screw drive assembly proposed in this application, and also ensure the safety of its load. Attached Figure Description

[0046] Figure 1 This is an isometric schematic diagram of the first type of screw drive assembly in this embodiment.

[0047] Figure 2 for Figure 1 An exploded view of the first type of screw drive assembly.

[0048] Figure 3 for Figure 2 An exploded view of the transmission nut.

[0049] Figure 4 This is an isometric schematic diagram of the second type of screw drive assembly in this embodiment.

[0050] Figure 5 for Figure 4 An exploded view of the second type of screw drive component.

[0051] Figure 6 This is a schematic diagram illustrating the tracking status of a solar energy device.

[0052] Figure 7 This is a schematic diagram of the solar panel in its folded state.

[0053] in:

[0054] 1. Central axis; 11. Fourth straight guide;

[0055] 2. Transmission nut; 21. First nut; 211. First guide rail section;

[0056] 22. Second nut; 221. Second guide rail section;

[0057] 23. Wave spring;

[0058] 24. First guide member; 241. Third guide rail section; 242. Mounting position;

[0059] 25. First anti-hair loss section;

[0060] 26. Third spiral spline;

[0061] 27. Third straight guide;

[0062] 3. Driving component; 31. Lead screw; 32. Lead screw nut; 33. Threaded sleeve; 34. Gear; 35. Motor;

[0063] 4. Transmission sleeve; 41. Left end sleeve; 42. Right end sleeve; 43. Fourth spiral spline;

[0064] 5. Ear piece;

[0065] 6. Screw drive assembly; 7. Photovoltaic panel; 8. Column. Detailed Implementation

[0066] The present invention will be further described in detail below with reference to the accompanying drawings.

[0067] As a first aspect of the invention, a helical transmission assembly 6 is provided, comprising a central shaft 1, at least two sets of transmission nuts 2, at least one driving member 3, a transmission sleeve 4, and a helical spline pair. At least two sets of transmission nuts 2 are sleeved on the central shaft 1; the driving member 3 drives the transmission nuts 2 to move synchronously along the axis of the central shaft 1 within the confinement of the central shaft 1. At least two sets of transmission nuts 2 are sleeved inside the transmission sleeve 4, that is, the transmission sleeve 4 is sleeved on the outer circumferential surface of at least two sets of transmission nuts 2. The helical spline pair is respectively disposed on the transmission nuts 2 and the transmission sleeve 4, and / or respectively disposed on the central shaft 1 and the transmission nuts 2. When the transmission nuts 2 are driven by the driving member 3, and the transmission nuts 2 move within the confinement of the central shaft 1, the transmission sleeve 4 rotates around its axis, causing the central shaft 1 and the transmission nuts 2 to engage in a helical transmission engagement, or the transmission nuts 2 and the transmission sleeve 4 to engage in a helical transmission engagement. When the driving member 3 drives the transmission nuts 2 to move, under the action of the helical spline pair, the transmission sleeve 4 and the central shaft 1 rotate relative to each other.

[0068] A helical spline pair refers to a kinematic pair in which internal and external helical splines cooperate to achieve helical transmission, and the lead of at least two sets of transmission nuts 2 is consistent with that of the transmission sleeve 4 or the central shaft 1. Splines are typically raised portions, while spline grooves are recessed portions that mate with them. However, in describing the first helical spline, the second helical spline, the third helical spline 26, and the fourth helical spline 43, this embodiment refers to components that may be raised or recessed in the helical spline pair. Each component can be raised or recessed as long as they can achieve a helical fit.

[0069] In some embodiments, the helical spline pair includes a first helical spline on the outer circumferential surface of the central shaft 1 and a second helical spline on the inner circumferential surface of the transmission nut 2 that engages with the first helical spline. Through the helical guidance of the first and second helical splines, the transmission nut 2 can be sleeved on the central shaft 1 along the helical guide, allowing them to rotate relative to each other and propel each other. The outer circumferential surface of the transmission nut 2 has a first straight guide, and the inner circumferential surface of the transmission sleeve 4 has a second straight guide that engages with the first straight guide. Through the linear guidance of the first and second straight guides, the driving member 3 drives the transmission nut 2 to move linearly along the central shaft 1. When the transmission sleeve 4 is stationary, the helical guidance of the first and second helical splines causes the central shaft 1 to rotate during the linear motion of the transmission nut 2. In this embodiment, since the length of the transmission nut 2 along the axial direction is less than that of the central shaft 1 and the transmission sleeve 4, the machining of the inner helix of the transmission nut 2 is relatively easy, facilitating production and manufacturing.

[0070] In such Figure 1 and Figure 2 In the first embodiment of the helical transmission assembly 6 shown, the outer circumferential surface of the central shaft 1 is provided with a third straight guide 27, and the inner circumferential surface of the transmission nut 2 is provided with a fourth straight guide 11 that cooperates with the third straight guide 27. Through the linear guidance of the third straight guide 27 and the fourth straight guide 11, the driving member 3 drives the transmission nut 2 to move linearly along the central shaft 1. The helical spline pair includes a third helical spline 26 provided on the outer circumferential surface of the transmission nut 2, and a fourth helical spline 43 provided on the inner circumferential surface of the transmission sleeve 4 that cooperates with the third helical spline 26. Through the helical guidance in the third helical spline 26 and the fourth helical spline 43, the transmission nut 2 can be sleeved on the central shaft 1 along the helical guidance, and the two can rotate relative to each other and propel each other. When the central shaft 1 is fixed, through the helical guidance of the third helical spline 26 and the fourth helical spline 43, the linear movement of the transmission nut 2 on the central shaft 1 causes the transmission sleeve 4 to rotate relative to it.

[0071] It should be noted that in some embodiments, only the first and second helical splines are provided, and the driving member 3 maintains linear motion or is provided with similar guide structures in other positions, which can achieve the same effect as the first and second straight guides. The same applies to the third helical spline 26 and the fourth helical spline 43, which will not be described in detail here.

[0072] Regarding the driving component 3: The driving component 3 is the part that drives the transmission nut 2 to move. Specifically, it can be composed of a hydraulic transmission structure, in which a hydraulic push rod drives the transmission nut 2 to move. It can also be a crank rocker mechanism, a gear 34 rack mechanism, or other structures, all of which can achieve similar technical effects.

[0073] In some embodiments, the driving component 3 includes a lead screw 31 and a lead screw nut 32 threadedly connected to the lead screw 31. The lead screw 31 is disposed outside the central shaft 1, and the lead screw nut 32 is fixedly connected to the transmission nut 2. The rotation of the lead screw 31 drives the lead screw nut 32 and the transmission nut 2 to move linearly, thereby realizing the relative rotation of the central shaft 1 or the transmission sleeve 4. Although this arrangement increases the overall volume, it does not occupy the internal space of the central shaft 1 or other components, making the overall structure more stable.

[0074] As shown in Figure 1 and Figure 2 In the first embodiment of the screw drive assembly 6 shown, the driving member 3 is also a lead screw 31 and a lead screw nut 32, but the interior of the central shaft 1 is provided with a cavity extending along the axial direction, and the side wall of the cavity is provided with a strip-shaped through hole, and the lead screw 31 and the lead screw nut 32 are located in the cavity.

[0075] It also includes a first connecting member, which is movably disposed in the strip-shaped through hole. The lead screw nut 32 is connected to at least one transmission nut 2 through the first connecting member. The rotation of the lead screw 31 drives the lead screw nut 32 and the transmission nut 2 to move linearly, thereby realizing the relative rotation of the central shaft 1 or the transmission sleeve 4.

[0076] The aforementioned method of placing the driving component 3 inside the central shaft 1 significantly reduces the volume of the screw drive assembly 6, thereby greatly improving the integration of the transmission structure. This approach achieves effective dimensional control while maintaining transmission operation, resulting in a more compact and efficient transmission system that ensures performance. This design not only saves materials but also significantly improves the flexibility and portability of the equipment in practical applications, especially in space-constrained situations.

[0077] It should be noted that the internal cavity of the central shaft 1 can be either through or non-through. The driving component 3 also includes a power source, which can be a motor 35, a hydraulic press, or other device capable of driving the lead screw 31 to rotate. Furthermore, regarding the groove on the outer circumferential surface of the central shaft 1, the groove size should be sufficient for the first connecting member to pass through, and the groove extends from one end of the central shaft 1 to the other, but does not penetrate the length direction of the central shaft 1. In this embodiment, the groove is a straight groove extending in a straight line. In embodiments where the outer circumferential surface of the central shaft 1 is helical, the groove can also be a helical groove extending helically along the central shaft 1. In some embodiments, the groove is not only used to allow the first connecting member to pass through the central shaft 1 and connect to the transmission nut 2, but the straight groove or helical groove can also serve a guiding function, enabling the transmission nut 2 to move along the extension direction of the straight groove or helical groove via the first connecting member when it moves.

[0078] When the length of the screw drive assembly 6 along the axis is long, multiple sets of drive nuts 2 can support the various parts divided along the axis, thereby improving the stability of the overall structure. Moreover, the second or third helical spline 26 of different drive nuts 2 can be finely adjusted in terms of lead or thickness while ensuring relative movement, thereby reducing the gap between the central shaft 1 and the drive nut 2 or the drive nut 2 and the drive sleeve 4, and improving stability.

[0079] In some embodiments, the lead screw nut 32, the first connecting member, and the transmission nut 2 form a set of axial motion components, and the number of lead screw nuts 32, the first connecting member, and the transmission nut 2 in the set of axial motion components is the same. Normally, the number of lead screw nuts 32, the first connecting member, and the transmission nut 2 is the same, but in certain special application scenarios, different numbers of lead screw nuts 32, the first connecting member, or the transmission nut 2 (or a set of transmission nuts 2) can be used according to actual needs. For example, in embodiments where the transmission nut 2 is long, multiple lead screw nuts 32 can be connected to the transmission nut 2.

[0080] In some embodiments, the lead screw 31 can drive multiple sets of axial motion components to move in the same direction along the central axis 1, thereby improving the stability of the transmission. And in other embodiments... Figure 2 In the first embodiment of the screw drive assembly 6 shown, two sets of axial motion assemblies are provided. The threaded portion of the lead screw 31 in the length direction is provided with a first thread and a second thread with opposite helical directions. When the lead screw 31 rotates, the axial motion assembly that cooperates with the first thread and the axial motion assembly that cooperates with the second thread move away from each other or move closer to each other. The lead screw 31 drives the two sets of axial motion assemblies to move in opposite directions along the central axis 1. Compared with the above-mentioned two sets of axial motion assemblies moving in the same direction, the two sets of axial motion assemblies moving in opposite directions in some embodiments can make the overall structure more stable because the axial motion assemblies move in opposite directions to different positions, emphasizing the bearing capacity at different positions.

[0081] In some embodiments, when the outer circumferential surface of the transmission nut 2 is provided with a third helical spline 26, the transmission sleeve 4 is composed of at least two unit sleeves fixedly connected. The helical direction of the fourth helical spline 43 on the inner circumferential surface of the transmission sleeve 4 matches the helical direction of the first and second threads in the lead screw 31. That is, the helical directions of the third helical spline 26 on the outer circumferential surfaces of the two transmission nuts 2 connected by the lead screw nut 32 driven by the opposite thread in the lead screw 31 are opposite. The helical directions of the fourth helical spline 43 of adjacent unit sleeves are different. In such cases... Figure 2In the illustrated embodiment, the transmission sleeve 4 consists of two unit sleeves, a left end sleeve 41 and a right end sleeve 42, and two transmission nuts 2. The fourth helixes in the two unit sleeves have different helical directions, and the fourth helix of each unit sleeve engages with the third helix on the outer circumferential surface of its corresponding transmission nut 2. This allows the two transmission nuts 2 to move closer or further apart within the transmission sleeve 4 during movement, thus dispersing the load-bearing force between the transmission nuts 2 and the transmission sleeve 4 during operation, thereby improving stability. Furthermore, embodiments including three or more sets of axial motion components are similar to the above, and will not be elaborated further.

[0082] In an embodiment similar to the above-described embodiment, an intermediate cylinder is also included, which is disposed between the two adjacent unit cylinders. The inner circumferential surface of the intermediate cylinder is not provided with a fourth helical spline. This reduces costs while meeting operational requirements when the overall length of the helical drive assembly is relatively long and excessive rotation angle is not required.

[0083] In some embodiments, a second connector is also included, which connects at least two sets of transmission nuts 2, so that when the lead screw nut 32 moves, it drives at least two sets of transmission nuts 2 to move synchronously. The second connector can be cylindrical or strip-shaped, etc., as long as it satisfies the requirement of synchronous movement of at least two sets of transmission nuts 2.

[0084] In some implementations, such as Figure 4 and Figure 5In the second embodiment of the screw drive assembly 6 shown, the driving element 3 includes a threaded sleeve 33 and a gear 34. The outer circumferential surface of the threaded sleeve 33 is threaded, and the interior of the threaded sleeve 33 is through-hole. The inner circumferential surface of the gear 34 is threaded to engage with the threaded sleeve 33, and the outer circumferential surface of the gear 34 is toothed. The threaded sleeve 33 is sleeved on the central shaft 1, the gear 34 is threadedly connected to the threaded sleeve 33, and the threaded sleeve 33 is fixedly connected to at least two transmission nuts 2. At least two transmission nuts 2 are fixedly connected in a manner that they are arranged on both sides of the threaded sleeve 33. The rotation of the gear 34 can drive the threaded sleeve 33 and the at least two transmission nuts 2 to move synchronously. In the embodiment where the driving element 3 is located inside the central shaft 1, a hole needs to be opened inside the central shaft 1. In this case, the size of the driving element 3 is limited by the hole inside the central shaft 1. When both the threaded sleeve 33 and the gear 34 are located on the outer circumference of the central shaft 1, the central shaft 1 does not need to have a hole, and the dimensions of the threaded sleeve 33 and the gear 34 do not need to take into account the dimensions of the central shaft 1. This not only enhances the structural stability and load-bearing capacity, making it suitable for high-load working conditions, but also increases the contact area, optimizes transmission efficiency, reduces friction loss, and thus extends the service life of the equipment. Furthermore, in some embodiments, the threaded sleeve 33 and the gear 34 are located at the center of the threaded sleeve 33, increasing the specific strength of the structure and ensuring more uniform force distribution and more stable movement during transmission.

[0085] exist Figure 5 In the second embodiment of the screw drive assembly 6 shown, the drive sleeve 4 includes a left end sleeve 41 and a right end sleeve 42 with the same helical direction.

[0086] In some embodiments, the transmission nut 2 is provided with a first reference point, and the threaded sleeve 33 has second reference points at both ends. The transmission nut 2 and the threaded sleeve 33 are positioned and connected through the first and second reference points. By setting the first and second reference points, the coaxiality of the connection between the transmission nut 2 and the threaded sleeve 33 is improved, making the transmission process smoother and more stable. The first and second reference points can be set on the anti-loosening component or on the guide component.

[0087] In other embodiments concerning the connection between the transmission nut 2 and the threaded sleeve 33, the inner circumferential surfaces of the transmission nut 2 and the threaded sleeve 33 are respectively provided with spur splines, and a shaft with a structure on its outer circumferential surface that mates with the aforementioned spur splines is also included. The transmission nut 2 and the threaded sleeve 33 are sleeved on the shaft, and then the transmission nut 2 and the threaded sleeve 33 are fixedly connected by setting the positions of the first reference point and the second reference point. The fixed connection can be achieved by welding, threaded connection, or keyed connection, etc. This arrangement can further improve the coaxiality of the connection between the transmission nut 2 and the threaded sleeve 33, and also facilitates processing during the connection process.

[0088] Since the second spiral on the inner circumferential surface of the transmission nut 2 or the third spiral spline 26 on the outer circumferential surface of the transmission nut 2 has common parts in many aspects, the following description is based on the third spiral spline 26.

[0089] The transmission nut 2 can be a single component or composed of multiple components. In some embodiments where the transmission nut 2 is composed of multiple components, such as... Figure 3 As shown, the transmission nut 2 includes a first nut 21, a second nut 22, a first elastic element, a first guide element 24, and a first anti-detachment part 25. The first nut 21 and the second nut 22 are coaxially arranged. Both the first nut 21 and the second nut 22 have a third helical spline 26 with the same pitch on their circumferential surfaces. The first nut 21 has a first guide rail portion 211, and the second nut 22 has a second guide rail portion 221. The first elastic element is located between the first nut 21 and the second nut 22. At least one first guide element 24 is included, which includes at least one connection position for connecting with the driving element 3. The first guide element 24 passes sequentially through the first guide rail portion 211 and the second guide rail portion 221 and is movably connected to the first nut 21 and the second nut 22. The transmission nut 25 is also included, which is fixedly connected to the first guide element 24 to limit the range of motion of the first nut 21 and the second nut 22. It should be noted that the connection in the above-mentioned "connection with the driving element 3" can be a direct connection or a connection as described above. Figure 3 The indirect connection is made through the first connector.

[0090] In some embodiments, the first guide member 24 is provided with a third guide rail portion 241 near the axis of the transmission nut 2. The third guide rail portion 241 is used to connect with an external active component, and the connection position is located on the third guide rail portion 241. By providing the third guide rail portion 241, the external active component can slide on the third guide rail portion 241 to the connection position, which makes the connection between the first guide member 24 and the external active component smoother and improves the installation speed.

[0091] Regarding the first nut 21 and the second nut 22: The circumferential surfaces of both the first nut 21 and the second nut 22 are provided with a third helical spline 26 of the same pitch. This means that the third helical spline 26 is provided on the inner circumferential surface of the first nut 21, and the third helical spline 26 is provided on the inner circumferential surface of the second nut 22. In this case, the first nut 21 and the second nut 22 can respectively be connected to components (such as threaded sleeves 33) whose outer circumferential surfaces are provided with mating third helical splines 26; or, as... Figure 3In the illustrated embodiment, a third helical spline 26 is provided on the outer circumferential surface of the first nut 21, and a third helical spline 26 is provided on the outer circumferential surface of the second nut 22. At this time, the first nut 21 and the second nut 22 can respectively be connected to components (such as the transmission sleeve 4) with mating helical splines on their inner circumferential surfaces. Furthermore, when the transmission nut 2 is in a stationary state not connected to any external component, there is a certain distance between the first nut 21 and the second nut 22, and the helical splines on their circumferential surfaces are not continuous but rather misaligned. After the transmission nut 2 is connected to the external component, through the helical transmission engagement between the transmission nut 2 and the external component, the aforementioned misalignment enables the transmission nut 2 to achieve a tight transmission state with the external component.

[0092] like Figure 3 As shown, in some embodiments, when the outer circumferential surface of the transmission nut 2 is provided with a third helical spline 26, the inner circumferential surface of the transmission nut 2 is provided with a straight tooth spline. The straight tooth spline allows for convenient and quick connection or transmission with external components. When the straight tooth spline is used for connection, the first nut 21 and the second nut 22 can move relative to the externally connected component along the straight tooth spline, and this relative movement allows the third helical spline 26 of the transmission sleeve 4 to fit more tightly with the external component. When the spur spline is used for transmission, while having the connection function of the spur spline, the first nut 21 and the second nut 22 can not only move relative to the externally connected components along the spur spline, but the transmission nut 2 can also move along the spur spline. At this time, since the first nut 21 and the second nut 22 have relative rotational motion, the relative rotation of the first nut 21 and the second nut 22 causes the spur spline in the transmission sleeve 4 to abut against the spline shaft. This abutting action will further enhance the tightness of the fit between the third helical spline 26 and the spur spline, thereby further reducing the clearance between the transmission sleeve 4 and the spline shaft and enhancing the stability of the transmission nut 2 when it moves along the spur spline.

[0093] Regarding the first guide member 24: In some embodiments, after cooperating with the first anti-detachment part 25, the first guide member 24 is only used to limit the movement of the first nut 21 and the second nut 22 within a certain range. The first guide member 24, the first guide rail part 211, and the second guide rail part 221 do not have a guiding function. In this case, the external component applies a force along the axis to the first guide member 24 to achieve the backlash elimination function of the transmission nut 2 proposed in this embodiment. In addition, when linear movement of the helical transmission sleeve 4 is required, straight tooth splines can be added to the circumferential surfaces of the first nut 21 and the second nut 22. Linear movement can be achieved through the cooperation of the straight tooth splines and the external component. In this case, the force applied by the external component to the first guide member 24 can be either axial or rotational. In other embodiments, the first guide member 24 not only has the function of limiting the movement range of the first nut 21 and the second nut 22, but also has a guiding function, such as... Figure 3As shown, when the main body of the first guide member 24 is a linear guide, the first nut 21 and the second nut 22 can move linearly along the main body of the first guide member 24. Furthermore, straight tooth splines can also be added to the circumferential surfaces of the first nut 21 and the second nut 22 to improve the stability and load-bearing capacity of the movement of the first nut 21 and the second nut 22.

[0094] In some embodiments, when the guiding body of the first guide member 24 is helical, the first nut 21 and the second nut 22 can rotate along the body, achieving similar technical effects in some implementation scenarios.

[0095] In some embodiments, the transmission nut 2 proposed in this embodiment is provided with a plurality of first guide members 24. Furthermore, the plurality of first guide members 24 are arranged in a circumferential array. This layout not only makes the distance between the first guide members 24 more uniform, but also effectively disperses the force, thereby significantly enhancing the overall strength and stability of the transmission nut 2.

[0096] Regarding the first anti-hair loss section 25: (as follows) Figure 3 In some embodiments shown, after the first guide member 24 is connected to the first nut 21 and the second nut 22, the first anti-detachment part 25 includes two independent components, which are respectively fixedly connected to both ends of the first guide member 24 to achieve the aforementioned function of limiting the range of motion. The fixed connection can be a detachable threaded connection, a snap-fit, or a non-detachable method such as welding. In some embodiments, one end of the first guide member 24 is fixedly connected to one first anti-detachment part 25, where the fixed connection refers to pre-welding or integral molding, and the other end is detachably fixedly connected to another first anti-detachment part 25, achieving a similar technical effect.

[0097] In some embodiments, the first anti-detachment part 25 can be manufactured by stamping, which can simplify the processing technology and save costs.

[0098] In some embodiments, the inner circumferential surface of the first anti-detachment part 25 is provided with a straight-tooth spline and a fixing part for fixed connection with the first guide member 24. The fixing part is groove-shaped and provided on the protruding portion of the straight-tooth spline on the inner circumferential surface of the first anti-detachment part 25. The protruding portion refers to... Figure 3 The raised portion of the straight spline shown increases the thickness from the bottom of the groove of the fixing part to the outer peripheral surface of the first anti-detachment part 25. After the first guide member 24 is inserted into the fixing part, a longer bolt can be used to fix the two together, improving the connection strength between the first guide member 24 and the fixing member, and improving the stability of the transmission nut 2 during operation.

[0099] In some embodiments, the first anti-detachment part 25 is in surface contact with the first nut 21 and / or the second nut 22, and the contact area of ​​the surface contact is close to the area of ​​the end face of the first nut 21 or the second nut 22. During the transmission movement of the transmission nut 2, the direct thrust on the first nut 21 or the second nut 22 is achieved by the first anti-detachment part 25. Therefore, increasing the contact area between the first anti-detachment part 25 and the first nut 21 or the second nut 22 reduces the pressure per unit area of ​​the first nut 21 and the second nut 22, lowers the risk of deformation caused by excessive pressure from the first anti-detachment part 25, and improves overall stability.

[0100] Regarding the first guide rail section 211 and the second guide rail section 221: (as follows) Figure 3 In the embodiment shown, the first guide rail portion 211 is grooved through the inner circumferential surface of the first nut 21, and the second guide rail portion 221 is grooved through the inner circumferential surface of the second nut 22. This connection method, which only requires sliding the first support member 24 into the first guide rail portion 211 and the second guide rail portion 221, simplifies the connection means between the first nut 21 and the second nut 22 and the first support member 24.

[0101] In some embodiments, at least one connection point for connection to an external active component is also included, the connection point being located on the first guide member 24. In such... Figure 3 In the embodiment shown, the connection position is a threaded hole, which is connected to the external active component by bolts or screws. The connection position can also be connected to the external active component by welding, snap-fitting, or other methods.

[0102] In other embodiments, the third guide rail portion 241 extends from one end of the first guide member 24 toward the other end, but does not penetrate through the first guide member 24. That is, it is not necessary to... Figure 3 The two openings at both ends of the third guide rail shown in the figure only require one end of the third guide rail to have an opening for connection with the external active component. This setting can save processing steps and reduce costs.

[0103] like Figure 3 In the embodiment shown, the connecting component is a lug 5, but in practice, the connecting component can also be a sliding plate or other components. The transmission nut 2 is sleeved on the spline shaft, and the lug 5 is connected to the lead screw 31 and lead screw nut 32 and is pre-set on the spline shaft. The lug 5 slides to the connection position through the third guide rail 241 and is fixedly connected to the first bearing guide 24 on the mounting position 242 by bolts, so as to realize the transmission connection between the lead screw 31, lead screw nut 32 and transmission nut 2.

[0104] In some embodiments, at least one second elastic element, at least one second guide element, and a second anti-detachment part are also included. The second guide element passes through at least two sets of transmission nuts 2, allowing them to be slidably connected. The second anti-detachment part is fixedly connected to the second guide element, restricting the movement of at least two sets of transmission nuts 2 to a certain range. At least one second elastic element is disposed between at least two transmission nuts 2 and / or at least one second elastic element is disposed between the transmission nut 2 and the second anti-detachment part. The second guide element is directly or indirectly connected to the driving element 3, allowing it to drive the movement of the second guide element, thereby achieving the helical transmission described in other embodiments. This embodiment only requires increasing the length of the second guide element to increase the number of transmission nuts 2, and can be used in embodiments with various conditions.

[0105] It should be noted that the first helical spline, the second helical spline, the third helical spline 26, and the fourth helical spline 43 (helix angles below refer to the above four types of splines) are generally greater than 0 degrees and less than 45 degrees. In some embodiments, the helix angle is greater than 0 degrees and less than 45 degrees. With a fixed diameter, there is a negative correlation between the helix angle and the lead; that is, the smaller the helix angle, the larger the lead. With a fixed friction force, the force required to rotate the transmission nut 2 to engage with the external component is correspondingly reduced. However, if the helix angle is adjusted to near 0 degrees, although the required force decreases, the length of the transmission nut 2 increases significantly when rotating relative to it by a certain angle, thus occupying more space and causing many inconveniences in practical applications. Conversely, if the helix angle is adjusted to near 45 degrees, although the length required for the transmission nut 2 when rotating relative to it is shorter, the requirements for surface roughness increase significantly, and the required applied force also increases accordingly. Therefore, based on experimental results in some embodiments, in an embodiment with a helix angle of 13 degrees, the helical transmission assembly 6 proposed in this embodiment can achieve stable transmission without occupying space.

[0106] In some embodiments, at least one of the first helical spline, the second helical spline, the third helical spline 26, or the fourth helical spline 43 is an involute spline. Involute helical splines provide a larger contact area in transmitting torque and motion, and also have advantages such as self-centering, high installation accuracy, and high load-bearing capacity.

[0107] Regarding the first and second elastic elements: The functions of the first and second elastic elements are essentially the same, mainly providing a certain elastic force. The first or second elastic element is composed of elastic components, which can be polymers such as rubber, or metal springs such as torsion springs or tension springs. In some embodiments, the first or second elastic element is a wave spring 23. Compared to other springs, the wave spring 23 has a more compact structure and can provide stronger elastic force within a limited space, making it particularly suitable for applications with limited installation space. In other embodiments, the first nut 21 and / or the second nut 22 are provided with spring grooves to accommodate the wave spring 23, preventing the spring from dislodging and improving space utilization. Furthermore, in embodiments with a single spring groove, overall integration can be improved and processing costs reduced.

[0108] As a second aspect of this specific embodiment, a solar energy device is proposed, including the aforementioned helical drive assembly 6, a light-receiving component, and a column 8. The helical drive assembly 6 is connected to both the light-receiving component and the column 8. When the helical spline pair is disposed on the drive nut 2 and the drive sleeve 4, the central shaft 1 is fixedly connected to the column 8, and the drive sleeve 4 is fixedly connected to the light-receiving component. When the helical spline pair is disposed on the central shaft 1 and the drive nut 2, the drive sleeve 4 is fixedly connected to the column 8, and the central shaft 1 is fixedly connected to the light-receiving component.

[0109] like Figure 6 and Figure 7 As shown, the light-receiving component is a photovoltaic panel 7, which has two states: folded and tracking, and includes multiple sets of the aforementioned spiral drive components 6. Alternatively, the light-receiving component can be a heat collection pipe, a concentrator, or other component that utilizes solar energy.

[0110] When the solar energy device is stationary or performing solar tracking and is affected by external factors such as wind, the photovoltaic panel 7 will sway. This swaying of the photovoltaic panel 7 exerts a force on the moving end of the screw drive assembly 6. The moving end of the screw drive assembly 6 transmits this force to the drive nut 2, causing the first nut 21 or the second nut 22, which abuts against the moving end, to tend to move axially. Because the drive nut 2 has an elastic element, the first nut 21 and the second nut 22 will move relative to each other under the action of the elastic force. In this way, the impact of the force from external factors such as wind on the screw drive assembly 6 is indirectly reduced, giving the screw drive assembly 6 the ability to buffer this force. The shock absorption and buffering capacity of the drive nut 2 is not limited to applications in solar energy devices, but can also be used in other structures prone to vibration or swaying.

[0111] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0112] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0113] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "provided with" and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0114] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the present invention should be included in the scope of the present invention.

Claims

1. A screw drive assembly, characterized in that: include, Central axis, At least two sets of transmission nuts, both of which are sleeved on the central shaft; At least one driving element is used to drive the transmission nut to move synchronously along the axis of the central shaft under the constraint of the central shaft; A transmission sleeve is fitted onto the outer circumferential surface of the at least two sets of transmission nuts; The spiral spline pair is respectively disposed on the transmission nut and the transmission sleeve, and / or respectively disposed on the central shaft and the transmission nut; When the driving component drives the transmission nut to move, the transmission sleeve and the central shaft rotate relative to each other under the action of the spiral spline pair.

2. The screw drive assembly as described in claim 1, characterized in that: The spiral spline pair includes a first spiral spline disposed on the outer circumferential surface of the central shaft, and a second spiral spline disposed on the inner circumferential surface of the transmission nut that mates with the first spiral spline; or, The spiral spline pair includes a third spiral spline disposed on the outer circumferential surface of the transmission nut, and a fourth spiral spline disposed on the inner circumferential surface of the transmission sleeve that mates with the third spiral spline.

3. The screw drive assembly as described in claim 2, characterized in that: When the inner circumferential surface of the transmission nut is provided with the second spiral spline, the inner circumferential surface of the transmission sleeve is provided with the first straight guide, and the outer circumferential surface of the transmission nut is provided with the second straight guide that cooperates with the first straight guide; When the outer circumferential surface of the transmission nut is provided with the third spiral spline, the inner circumferential surface of the transmission nut is provided with the third straight guide, and the outer circumferential surface of the central shaft is provided with the fourth straight guide that cooperates with the third straight guide.

4. The screw drive assembly as described in claim 1, characterized in that: The driving component includes a lead screw and a lead screw nut that cooperates with the lead screw; The central shaft has a cavity extending along the axial direction inside, and the side wall of the cavity has a strip-shaped through hole. The lead screw and the lead screw nut are located in the cavity. It also includes a first connector, which is movably disposed in the strip-shaped through hole, and the lead screw nut is connected to at least one of the transmission nuts through the first connector.

5. The screw drive assembly as described in claim 4, characterized in that: A set of lead screw nuts, a set of transmission nuts, and a first connecting member connecting the lead screw nut and the transmission nuts constitute a set of axial motion components, including at least two sets of axial motion components. The lead screw is provided with a first thread and a second thread with opposite helical directions in the length direction. When the lead screw rotates, the axial motion component that cooperates with the first thread and the axial motion component that cooperates with the second thread move away from each other or move closer together.

6. The screw drive assembly as described in claim 5, characterized in that: When the outer circumferential surface of the transmission nut is provided with a third helical spline, the transmission sleeve is composed of at least two unit sleeves fixedly connected. The fourth helical spline provided on the inner circumferential surface of the transmission sleeve is adapted to the helical direction of the first thread and the second thread in the lead screw. The helical direction of the fourth helical spline of adjacent unit sleeves is different.

7. The screw drive assembly as described in claim 4, characterized in that: It also includes a second connector, which is connected to the first connector, and at least two sets of the transmission nuts are connected to the second connector.

8. The screw drive assembly as described in claim 1, characterized in that: The driving component includes a threaded sleeve and a gear, with the threaded sleeve sleeved on the central shaft; The outer circumferential surface of the threaded sleeve is provided with a third thread, and the two ends of the threaded sleeve are respectively connected to the transmission nut; The inner circumferential surface of the gear is provided with a fourth thread that mates with the third thread, and the gear and the threaded sleeve are driven together by the fourth thread and the third thread. The outer circumferential surface of the gear is provided with transmission teeth for transmission connection with an external power source. When the gear rotates, it drives the threaded sleeve and the transmission nuts located at both ends of the threaded sleeve to move synchronously along the central axis.

9. The screw drive assembly as described in any one of claims 1-8, characterized in that: The transmission nut includes a first nut, a second nut, a first elastic element, a first guide element, and a first anti-loosening part. The first nut and the second nut are coaxially arranged. The first nut is provided with a first guide rail portion, and the second nut is provided with a second guide rail portion. The first elastic element is disposed between the first nut and the second nut. The first guide member includes at least one connection position for connecting with the active member; the first guide member passes through the first guide rail portion and the second guide rail portion in sequence, and is movably connected with the first nut and the second nut; The first anti-detachment part is fixedly connected to the first bearing guide to limit the range of motion of the first nut and the second nut.

10. The screw drive assembly as described in claim 9, characterized in that: The first bearing member has a third guide rail portion located near the axis of the transmission nut. The third guide rail portion is used to connect with the driving member, and the connection position is located on the third guide rail portion.

11. The screw drive assembly as claimed in claim 1, characterized in that: It also includes at least one second elastic element, at least one second guide element, and a second anti-detachment part. The second guide element passes through the at least two sets of transmission nuts to make them slidably connected. The second anti-detachment part is fixedly connected to the second guide element, restricting the at least two sets of transmission nuts to move only within a certain range. The at least one second elastic element is disposed between the at least two transmission nuts and / or the at least one second elastic element is disposed between the transmission nut and the second anti-detachment part.

12. A solar energy device, characterized in that: The spiral drive assembly, including any one of claims 1 to 11, further includes a light-receiving element and a column, wherein the spiral drive assembly is connected to the light-receiving element and the column respectively.

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