Screw transmission assembly and solar device

Abstract

The utility model relates to the field of mechanical transmission, in particular to a spiral transmission assembly, which comprises a central shaft, at least two groups 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] The utility model relates to the field of mechanical transmission, in particular to a screw transmission assembly and a solar device. Background Art

[0002] In mechanical transmission, due to the great machining difficulty of the internal screw of the screw transmission assembly with a large lead, it is difficult to promote and apply; for the screw transmission assembly with a large lead (for example, the helix angle is less than 45 degrees), when an external force is applied at the load end, the influence on the power source is the smallest. Therefore, in outdoor applications such as photovoltaic tracking and rotating advertisements, applying a screw transmission assembly with a large lead can better protect the power source.

[0003] Due to the great machining difficulty of the internal screw, the machining accuracy cannot be guaranteed, and the interference fit phenomenon is very likely to occur in the screw matching part, resulting in a reduction in transmission efficiency; for this reason, when preparing the screw transmission assembly, a negative tolerance is usually set for the screw part, which in turn leads to a gap in the screw matching part, resulting in a reduction in transmission accuracy, and when the load is suddenly affected by natural environments such as wind, the screw part is very likely to collide, resulting in damage or even destruction of the transmission assembly.

[0004] How to design a structure that can reduce the transmission gap of the screw transmission assembly has become a technical problem to be solved urgently. Summary of the Utility Model

[0005] The utility model first proposes a screw transmission assembly to solve the problems of low transmission efficiency or low transmission accuracy of the existing screw transmission assembly; secondly, the utility model proposes a solar device.

[0006] As the first aspect of the utility model, a screw transmission assembly is proposed, including,

[0007] A central shaft,

[0008] At least two sets of transmission nuts, and the at least two sets of transmission nuts are all arranged on the central shaft;

[0009] At least one driving member, which is used to drive the transmission nut to move synchronously along the axis of the central shaft under the limitation of the central shaft;

[0010] A transmission sleeve, which is sleeved on the outer peripheral surface of the at least two sets of transmission nuts;

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

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

[0013] Preferably, the spiral spline pair includes a first spiral spline provided on the outer peripheral surface of the central shaft and a second spiral spline provided on the inner peripheral surface of the drive nut and mating with the first spiral spline. When the driving member drives the drive nut to move linearly and the drive sleeve is fixed, the drive nut moves linearly on the central shaft, causing the central shaft to rotate.

[0014] Or,

[0015] the spiral spline pair includes a third spiral spline provided on the outer peripheral surface of the drive nut and a fourth spiral spline provided on the inner peripheral surface of the drive sleeve and mating with the third spiral spline. When the driving member drives the drive nut to move linearly and the central shaft is fixed, the drive nut moves linearly on the central shaft, causing the drive sleeve to rotate relatively.

[0016] Preferably, when the second spiral spline is provided on the inner peripheral surface of the drive nut, a first straight guide is provided on the inner peripheral surface of the drive sleeve, and a second straight guide mating with the first straight guide is provided on the outer peripheral surface of the drive nut.

[0017] When the third spiral spline is provided on the outer peripheral surface of the drive nut, a third straight guide is provided on the inner peripheral surface of the drive nut, and a fourth straight guide mating with the third straight guide is provided on the outer peripheral surface of the central shaft.

[0018] Preferably, the driving member includes a lead screw and a lead screw nut mating with the lead screw.

[0019] A chamber extending in the axial direction is provided inside the central shaft, and a strip-shaped through hole is provided on the side wall of the chamber. The lead screw and the lead screw nut are provided in the chamber.

[0020] Further included is a first connecting member movably provided in the strip-shaped through hole. The lead screw nut is connected to at least one of the drive nuts through the first connecting member.

[0021] Preferably, one lead screw nut, a set of drive nuts, and the first connecting member connecting the lead screw nut and the drive nuts form a set of axial movement components. There are at least two sets of axial movement components. First threads and second threads with opposite spiral directions are provided in the length direction of the lead screw. When the lead screw rotates, the axial movement components mating with the first threads and the axial movement components mating with the second threads move away from or close to each other.

[0022] Preferably, when a third helical spline is provided on the outer peripheral surface of the transmission nut, the transmission sleeve is fixedly connected by at least two unit sleeves. The fourth helical spline provided on the inner peripheral surface of the transmission sleeve is adapted to the helical directions of the first thread and the second thread on the lead screw, and the helical directions of the fourth helical splines of adjacent unit sleeves are different.

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

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

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

[0026] The inner peripheral surface of the gear is provided with a fourth thread that mates with the third thread, and the gear and the threaded sleeve are in transmission cooperation through the fourth thread and the third thread;

[0027] The outer peripheral 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 provided at both ends of the threaded sleeve to move synchronously along the central shaft.

[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 member, a first guiding member, and a first anti - detachment portion.

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

[0032] The first guiding member includes at least one connecting position for connecting with the driving member; the first guiding member sequentially passes through the first guide portion and the second guide portion, and is movably connected to the first nut and the second nut;

[0033] The first anti - detachment portion is fixedly connected to the first guiding member and is used to limit the movement range of the first nut and the second nut.

[0034] Preferably, a third guide rail portion is provided at a position of the first guiding member close to the axis of the transmission nut. The third guide rail portion is used for cooperating and connecting with the driving member, and the connection position is provided on the third guide rail portion.

[0035] Preferably, when the driving member is a threaded sleeve and a gear, the first reference point is provided on the guiding member.

[0036] Preferably, it further includes at least one second elastic member, at least one second guiding member and a second anti - detachment portion. The second guiding member passes through the at least two groups of transmission nuts to make them slidably connected. The second anti - detachment portion is fixedly connected to the second guiding member to limit the at least two groups of transmission nuts to move only within a certain range. The at least one second elastic member is arranged between the at least two transmission nuts and / or the at least one second elastic member is arranged between the transmission nut and the second anti - detachment portion.

[0037] As a second aspect of the present invention, a solar energy device is proposed, which includes the above - mentioned screw drive assembly, and further includes a light - receiving member and a column. The screw drive assembly is respectively connected to the light - receiving member and the column.

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

[0039] 1. In the screw drive assembly proposed in this application, at least two groups of transmission nuts are provided. When the at least two groups of transmission nuts are respectively in screw drive with the central shaft or the transmission sleeve, by adjusting the distance between different groups of transmission nuts (in the form of a second connecting member or a spring, etc.), it not only realizes that one side of the helical spline provided on the transmission sleeve and / or the central shaft abuts against the helical spline on one group of transmission nuts, and the opposite side abuts against the helical spline on another group of transmission nuts, reducing the processing requirements. At the same time, it also makes the transmission of the screw drive assembly proposed in this application more stable and accurate.

[0040] 2. During the long - term movement of the screw drive assembly, the mutually contacting surfaces in the helical spline pair will inevitably have different degrees of wear. By using at least two groups of transmission nuts, it is also possible to regularly or irregularly adjust the distance between different groups of transmission nuts to eliminate the gap caused by wear during use, thereby extending the service life of the screw drive assembly proposed in this application. The above - mentioned method of being able to adjust the distance between different groups of transmission nuts can also reduce the transmission gap of the screw drive assembly by adjusting the length of the second connecting member or the form of the spring according to different degrees of wear.

[0041] 3. When the driving member is a combination of a lead screw and a lead screw nut, a chamber extending along the axis direction can also be arranged inside the central shaft to accommodate the driving member, so that the overall spiral transmission assembly proposed by the present application is more compact; further, by using the lead screw and the lead screw nut as the driving member, the threads on the lead screw can also be set as the first thread and the second thread with opposite spiral directions. Thus, when the lead screw rotates driven by an external power source, the transmission nuts drivingly connected to the first thread and the transmission nuts drivingly connected to the second thread move in opposite directions, that is, move away from or close to each other. When the transmission sleeve and the central shaft rotate relative to each other, the forces among the central shaft, the transmission nut and the transmission sleeve are more uniform, improving the transmission stability of the spiral transmission assembly proposed by the present application.

[0042] 4. When the driving member is a threaded sleeve and a gear, it is not necessary to open a chamber for accommodating the driving member inside the central shaft, which can not only ensure the stability and load-bearing capacity of the spiral transmission assembly proposed by the present application, making it suitable for high-load working conditions, but also enable the size of the driving member not to be limited by the hole inside the central shaft. Therefore, it is beneficial to increase the contact area during the driving of the driving member, optimize the transmission efficiency, reduce the friction loss, and further ensure the service life of the spiral transmission assembly proposed by the present application. In addition, in some embodiments, the threaded sleeve and the gear are arranged at the central position of the threaded sleeve, thereby improving the specific strength of the structure and making the force on it uniform and the movement more stable during transmission.

[0043] 5. When the length dimension of the spiral transmission assembly along the axis is relatively large, at least two sets of spaced transmission nuts can support the respective parts divided along the axis in the transmission sleeve and the central shaft, improving the stability of the overall structure.

[0044] 6. When the transmission nut is at least composed of a first nut, a second nut, a first elastic member, a first guiding member and a first anti-disengagement part, the first nut and the second nut in the same transmission nut can respectively abut against the spiral splines arranged on the central shaft and / or the transmission sleeve, that is, a single transmission nut also realizes clearance elimination, thereby further improving the transmission stability of the spiral transmission assembly proposed by the present application.

[0045] 7. Further, when using the screw drive assembly proposed in the present application, when the load, such as the photovoltaic panel in a solar device, is affected by external factors such as wind, a force will be exerted on the moving end (such as the drive sleeve) in the screw drive assembly. The moving end of the screw drive assembly transmits the force to the sleeve, causing the first nut or the second nut (or multiple drive nuts) in contact with the moving end to have a tendency to move axially. A first elastic member is provided between the first nut and the second nut, which can not only enable the load to move within an allowable range under the influence of external factors, reducing the risk of the load being damaged by external factors, but also slow down the impact of external factors on the power source used to drive the screw drive assembly proposed in the present application. That is, it can not only reduce the maintenance cost of the device (such as a solar device) using the screw drive assembly proposed in the present application, but also ensure the safety of its load. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 Is an axonometric schematic diagram of the first screw drive assembly in this embodiment.

[0047] Figure 2 Is Figure 1 The exploded schematic diagram of the first screw drive assembly in

[0048] Figure 3 Is Figure 2 The exploded schematic diagram of the drive nut in

[0049] Figure 4 Is an axonometric schematic diagram of the second screw drive assembly in this embodiment.

[0050] Figure 5 Is Figure 4 The exploded schematic diagram of the second screw drive assembly in

[0051] Figure 6 Is a schematic diagram of the tracking state of the solar device.

[0052] Figure 7 Is a schematic diagram of the folded state of the solar device.

[0053] Wherein:

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

[0055] 2. Drive nut; 21. First nut; 211. First guide rail part;

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

[0057] 23. Wave spring;

[0058] 24. First guiding member; 241. Third guide rail part; 242. Installation position;

[0059] 25. The first anti - detachment part;

[0060] 26. The third helical spline;

[0061] 27. The third straight guide;

[0062] 3. The driving part; 31. The lead screw; 32. The lead screw nut; 33. The threaded sleeve; 34. The gear; 35. The motor;

[0063] 4. The transmission sleeve; 41. The left - end sleeve; 42. The right - end sleeve; 43. The fourth helical spline;

[0064] 5. The lug;

[0065] 6. The helical transmission assembly; 7. The photovoltaic panel; 8. The column. Detailed implementation mode

[0066] The following further describes the present utility model in detail with reference to specific drawings.

[0067] As the first aspect of the present utility model, a helical transmission assembly 6 is proposed, which includes a central shaft 1, at least two sets of transmission nuts 2, at least one driving part 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 part 3 is used to drive the transmission nuts 2 to move synchronously along the axis of the central shaft 1 under the limitation of the central shaft 1. At least two sets of transmission nuts 2 are inserted into the interior of the transmission sleeve 4, that is, the transmission sleeve 4 is sleeved on the outer peripheral surface of at least two sets of transmission nuts 2. The helical spline pair is respectively arranged on the transmission nut 2 and the transmission sleeve 4, and / or is respectively arranged on the central shaft 1 and the transmission nut 2. When the transmission nut 2 is driven by the driving part 3 and moves under the limitation of the central shaft 1, the transmission sleeve 4 rotates around its axis. The central shaft 1 and the transmission nut 2 are in helical transmission cooperation, or the transmission nut 2 and the transmission sleeve 4 are in helical transmission cooperation. When the driving part 3 drives the transmission nut 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] The helical spline pair refers to a kinematic pair in which the inner and outer helical splines cooperate with each other to achieve helical transmission, and the lead of at least two sets of transmission nuts 2 is the same as that of the transmission sleeve 4 or the central shaft 1. The spline is usually the protruding part, and the spline groove is the recessed part that cooperates with it. However, when describing the first helical spline, the second helical spline, the third helical spline 26 and the fourth helical spline 43, in this embodiment, it refers to the components that may be the protrusion or the recess in the helical spline pair. As long as they can achieve helical cooperation, each component can be the protrusion or the recess.

[0069] In some embodiments, the helical spline pair includes a first helical spline provided on the outer peripheral surface of the central shaft 1 and a second helical spline provided on the inner peripheral surface of the drive nut 2 and mating with the first helical spline. Through the cooperation of the helical guides in the first helical spline and the second helical spline, the drive nut 2 can be sleeved on the central shaft 1 along the helical guide, and the two can rotate relative to each other and perform a pushing motion. The outer peripheral surface of the drive nut 2 is provided with a first straight guide, and the inner peripheral surface of the drive sleeve 4 is provided with a second straight guide mating with the first straight guide. Through the linear guides of the first straight guide and the second straight guide, the active member 3 drives the drive nut 2 to move linearly along the central shaft 1. When the drive sleeve 4 is fixed, through the helical guide of the first helical spline and the second helical spline, the drive nut 2 causes the central shaft 1 to rotate during linear motion. In this embodiment, since the length of the drive nut 2 in the axial direction is less than that of the central shaft 1 and the drive sleeve 4, the processing of the internal helix of the drive nut 2 is relatively easy, facilitating production and manufacturing.

[0070] In the first embodiment of the helical drive assembly 6 as shown in Figure 1 and Figure 2 , a third straight guide 27 is provided on the outer peripheral surface of the central shaft 1, and a fourth straight guide 11 mating with the third straight guide 27 is provided on the inner peripheral surface of the drive nut 2. Through the linear guides of the third straight guide 27 and the fourth straight guide 11, the active member 3 drives the drive nut 2 to move linearly along the central shaft 1. The helical spline pair includes a third helical spline 26 provided on the outer peripheral surface of the drive nut 2 and a fourth helical spline 43 provided on the inner peripheral surface of the drive sleeve 4 and mating with the third helical spline 26. Through the cooperation of the helical guides in the third helical spline 26 and the fourth helical spline 43, the drive nut 2 can be sleeved on the central shaft 1 along the helical guide, and the two can rotate relative to each other and perform a pushing motion. When the central shaft 1 is fixed, through the helical guide of the third helical spline 26 and the fourth helical spline 43, the drive nut 2 moves linearly on the central shaft 1, causing the drive sleeve 4 to rotate relatively.

[0071] It should be noted that in some embodiments, only the first helical spline and the second helical spline are provided, and the active member 3 maintains linear motion or a similar guiding structure is provided at other positions, and the same effects as those of the first straight guide and the second straight guide can also be achieved. The same applies to the third helical spline 26 and the fourth helical spline 43, which will not be elaborated here.

[0072] Regarding the active member 3: The active member 3 is a component that drives the drive nut 2 to move. Specifically, it can be composed of a hydraulic drive structure, and the drive nut 2 is driven to move by a hydraulic push rod. It can also be a crank-rocker mechanism, a gear-rack mechanism, etc., and similar technical effects can be achieved.

[0073] In some embodiments, the driving member 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 the overall volume increases in this setting method, it can avoid occupying the internal space of the central shaft 1 or other components, making the overall structure more stable.

[0074] In the first embodiment of the screw drive assembly 6 as shown in FIG. 1 and Figure 2 the driving member 3 is also the lead screw 31 and the lead screw nut 32. However, a chamber extending along the axial direction is provided inside the central shaft 1, and a strip-shaped through hole is provided on the side wall of the chamber. The lead screw 31 and the lead screw nut 32 are disposed in the chamber;

[0075] It further includes a first connecting member 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 above method of disposing the driving member 3 inside the central shaft 1 significantly reduces the volume of the screw drive assembly 6, thereby greatly improving the integration degree of the transmission structure. Through this method, while maintaining the transmission work, effective control of the size is achieved, making the entire transmission system more compact and efficient on the basis of ensuring performance. This design not only saves materials but also significantly improves the flexibility and portability of the equipment in practical applications. Especially in occasions with limited space, the advantages of this design are particularly prominent.

[0077] It should be noted that the chamber inside the central shaft 1 can be through or non-through. The driving member 3 further includes a power source, which can be a device such as a motor 35 or a hydraulic press that can drive the lead screw 31 to rotate. In addition, regarding the groove on the outer peripheral surface of the central shaft 1, the size of the groove 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 end, but the groove does not penetrate the length direction of the central shaft 1. In this embodiment, the groove is a straight groove extending linearly. In the embodiment where the outer peripheral surface of the central shaft 1 is helical, the groove can also be a helical groove extending along the central shaft 1. In some embodiments, the groove is not only used for the first connecting member to pass through the central shaft 1 to connect with the transmission nut 2, but the straight groove or the helical groove can also serve as a guiding function, enabling the transmission nut 2 to move along the extending direction of the straight groove or the helical groove through the first connecting member when moving.

[0078] When the length of the screw drive assembly 6 along the axis is relatively long, multiple sets of drive nuts 2 can support each part divided along the axis, thereby improving the stability of the overall structure. Moreover, the second helical spline or the third helical spline 26 of different drive nuts 2 can fine-tune their lead or thickness on the basis of ensuring relative movement, so as to reduce the clearance during the movement of the central shaft 1 and the drive nut 2 or between the drive nut 2 and the drive sleeve 4, and improve the stability.

[0079] In some embodiments, the lead screw nut 32, the first connecting member and the drive nut 2 form a set of axial movement components, and the number of the lead screw nut 32, the first connecting member and the drive nut 2 in a set of axial movement components is the same. Usually, the number of the lead screw nut 32, the first connecting member and the drive nut 2 is the same, but in some special application scenarios, different numbers of the lead screw nut 32, the first connecting member or the drive nut 2 (or a set of drive nuts 2) can be applied according to actual needs. For example, in an embodiment where the length of the drive nut 2 is relatively long, multiple lead screw nuts 32 can be provided to be connected to the drive nut 2.

[0080] In some embodiments, the lead screw 31 can drive multiple sets of axial movement components to move in the same direction along the central shaft 1, thereby improving the transmission stability. And in the first embodiment of the screw drive assembly 6 as shown in Figure 2 When the lead screw 31 rotates, the axial movement component engaged with the first thread and the axial movement component engaged with the second thread move away from or close to each other. The lead screw 31 drives the two sets of axial movement components to move in the opposite direction along the central shaft 1. Compared with the two sets of axial movement components moving in the same direction, in some embodiments, when the two sets of axial movement components move in the opposite direction to different positions, the bearing capacity of different positions is emphasized, and the overall structure can be made more stable.

[0081] In some embodiments, when the outer peripheral surface of the drive nut 2 is provided with the third helical spline 26, the drive sleeve 4 is fixedly connected by at least two unit sleeves. The fourth helical spline 43 provided on the inner peripheral surface of the drive sleeve 4 is adapted to the helical directions of the first thread and the second thread of the lead screw 31, that is, the helical directions of the third helical splines 26 on the outer peripheral surfaces of the two drive nuts 2 connected to the lead screw nuts 32 driven by the opposite threads in the lead screw 31 are opposite. The helical directions of the fourth helical splines 43 of adjacent unit sleeves are different. In the case of Figure 2In the illustrated embodiment, the drive sleeve 4 is composed of two unit sleeves, namely a left-end sleeve 41 and a right-end sleeve 42, and two drive nuts 2. The fourth helices in the two unit sleeves have different helical directions, and each fourth helix of a unit sleeve mates with the third helix on the outer peripheral surface of the drive nut 2 that mates with it. In this way, during movement, the two drive nuts 2 move away from or close to each other within the drive sleeve 4, enabling the helical drive assembly 6 to disperse the bearing capacity between the drive nut 2 and the drive sleeve 4 during operation, thereby improving stability. In addition, the embodiments including more than 3 sets of axial movement assemblies are similar to the above and will not be elaborated further.

[0082] In an embodiment similar to the above embodiment, an intermediate sleeve is further included. The intermediate sleeve is disposed between the two adjacent unit sleeves, and no fourth helical spline is provided on the inner peripheral surface of the intermediate sleeve. In this way, when the overall length of the helical drive assembly is relatively long and there is no need to rotate through a large angle, the cost can be reduced on the basis of meeting the working requirements.

[0083] In some embodiments, a second connecting member is further included. The second connecting member connects at least two sets of drive nuts 2, and drives the at least two sets of drive nuts 2 to move synchronously when the lead screw nut 32 moves. The second connecting member can be cylindrical or strip-shaped, etc., as long as it can satisfy the synchronous movement of at least two sets of drive nuts 2.

[0084] In some embodiments, such as Figure 4 and Figure 5In the second embodiment of the screw drive assembly 6 shown, the driving member 3 includes a threaded sleeve 33 and a gear 34. The outer peripheral surface of the threaded sleeve 33 is provided with threads, and the interior of the threaded sleeve 33 is through. The inner peripheral surface of the gear 34 is provided with threads that are in threaded engagement with the threaded sleeve 33, and the outer peripheral 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 drive nuts 2. At least two drive nuts 2 are fixedly connected in a manner of being arranged on both sides of the threaded sleeve 33. The rotation of the gear 34 can drive the threaded sleeve 33 and at least two drive nuts 2 to move synchronously. In the embodiment where the driving member 3 is arranged inside the central shaft 1, a hole needs to be opened inside the central shaft 1. At this time, the size of the driving member 3 is limited by the hole inside the central shaft 1. When both the threaded sleeve 33 and the gear 34 are arranged on the outer peripheral surface of the central shaft 1, the central shaft 1 does not need to be opened with a hole, and the sizes of the threaded sleeve 33 and the gear 34 do not need to consider the size of the central shaft 1. This not only strengthens the structural stability and load-bearing capacity, making it suitable for high-load working conditions, but also increases the contact area, optimizes the transmission efficiency, reduces the frictional loss, and thus prolongs the service life of the equipment. In addition, in some embodiments, the threaded sleeve 33 and the gear 34 are arranged at the central position of the threaded sleeve 33, which improves the specific strength of the structure and makes the force more uniform and the movement more stable during transmission.

[0085] In 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 spiral direction.

[0086] In some embodiments, the drive nut 2 is provided with a first reference point, and both ends of the threaded sleeve 33 are provided with a second reference point. The drive nut 2 and the threaded sleeve 33 are positioned and connected through the first reference point and the second reference point. By setting the first reference point and the second reference point, the coaxiality of the connection between the drive nut 2 and the threaded sleeve 33 is improved, making it more smooth and stable during transmission. Regarding the setting positions of the first reference point and the second reference point, they can be set on the anti-disengagement member or on the guiding member.

[0087] In other embodiments regarding the connection between the drive nut 2 and the threaded sleeve 33, the inner peripheral surfaces of the drive nut 2 and the threaded sleeve 33 are respectively provided with straight-tooth splines, and it further includes a shaft with a structure on its outer peripheral surface that is in cooperation with the above-mentioned straight-tooth splines. The drive nut 2 and the threaded sleeve 33 are sleeved on the shaft, and then the drive nut 2 and the threaded sleeve 33 are fixedly connected through the setting positions of the first reference point and the second reference point. The fixed connection methods can be welding, threaded connection, key connection with a pin, etc. This setting method can further improve the coaxiality of the connection between the drive nut 2 and the threaded sleeve 33, and also facilitates the processing during the connection process.

[0088] Since the second helix provided on the inner peripheral surface of the drive nut 2 or the third spline 26 provided on the outer peripheral surface of the drive nut 2 have common parts in multiple aspects, the following content will be described by the third spline 26.

[0089] The drive nut 2 can be composed of a single component or multiple components. In some embodiments where the drive nut 2 is composed of multiple components, as Figure 3 shown, the drive nut 2 includes a first nut 21, a second nut 22, a first elastic member, a first guiding member 24 and a first anti - detachment portion 25. The first nut 21 and the second nut 22 are coaxially arranged. The peripheral surfaces of the first nut 21 and the second nut 22 are both provided with third splines 26 having the same pitch. The first nut 21 is provided with a first guide portion 211, and the second nut 22 is provided with a second guide portion 221. The first elastic member is arranged between the first nut 21 and the second nut 22. At least one first guiding member 24, the first guiding member 24 includes at least one connecting position for connecting with the driving member 3; the first guiding member 24 sequentially passes through the first guide portion 211 and the second guide portion 221, and is movably connected to the first nut 21 and the second nut 22. It further includes a first anti - detachment portion 25, and the first anti - detachment portion 25 is fixedly connected to the first guiding member 24 for restricting the movement range of the first nut 21 and the second nut 22. It should be noted that in the above "connected to the driving member 3", the connection can be a direct connection or an indirect connection through a first connecting member as in Figure 3 the figure.

[0090] In some embodiments, a third guide portion 241 is provided at a position of the first guiding member 24 close to the axis of the drive nut 2. The third guide portion 241 is used for mating connection with an external driving component, and the connecting position is arranged on the third guide portion 241. By providing the third guide portion 241, the external driving component can slide on the third guide portion 241 to the connecting position, which can make the connection between the first guiding member 24 and the external driving component smoother and improve the installation speed.

[0091] Regarding the first nut 21 and the second nut 22: the peripheral surfaces of the first nut 21 and the second nut 22 are provided with third splines 26 having the same pitch, which means that the third spline 26 is provided on the inner peripheral surface of the first nut 21 and the third spline 26 is provided on the inner peripheral surface of the second nut 22. At this time, the first nut 21 and the second nut 22 can be respectively in driving connection with a component (such as a threaded sleeve 33) having a mating third spline 26 on its outer peripheral surface; or, as Figure 3In the illustrated embodiment, a third helical spline 26 is provided on the outer peripheral surface of the first nut 21, and a third helical spline 26 is provided on the outer peripheral surface of the second nut 22. At this time, the first nut 21 and the second nut 22 can be respectively drivingly connected to a component (such as the transmission sleeve 4) having a mating helical spline on its inner peripheral surface. Moreover, when the transmission nut 2 is in a stationary state without being connected to an 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 have a certain dislocation; after the transmission nut 2 is connected to an external component, through the helical transmission cooperation between the transmission nut 2 and the external component, the above-mentioned dislocation enables the transmission nut 2 to achieve a tight driving state with the external component.

[0092] As Figure 3 shown, in some embodiments, when a third helical spline 26 is provided on the outer peripheral surface of the transmission nut 2, a straight-tooth spline is provided on the inner peripheral surface of the transmission nut 2, and it is possible to conveniently and quickly connect or transmit power to an external component through the straight-tooth spline. When the straight-tooth spline is used for connection, the first nut 21 and the second nut 22 can move relative to the component connected to the outside along the straight-tooth spline, and through this relative movement, the third helical spline 26 of the transmission sleeve 4 is more tightly fitted with the external component. When the straight-tooth spline is used for transmission, while having the connection function of the straight-tooth spline, not only can the first nut 21 and the second nut 22 move relative to the component connected to the outside along the straight-tooth spline, but the transmission nut 2 can also move along the straight-tooth spline. At this time, due to the relative rotation movement of the first nut 21 and the second nut 22, the relative rotation of the first nut 21 and the second nut 22 causes the straight-tooth spline in the transmission sleeve 4 to abut against the spline shaft, and this abutting effect further enhances the tightness of the cooperation between the third helical spline 26 and the straight-tooth 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 moving along the straight-tooth spline.

[0093] Regarding the first guiding member 24: In some embodiments, after the first guiding member 24 is engaged with the first anti-disengagement portion 25, it is only used to limit the movement of the first nut 21 and the second nut 22 within a certain range. The first guiding member 24, the first guide rail portion 211, and the second guide rail portion 221 do not have a guiding function. At this time, an external component applies an axial movement force to the first guiding member 24 to achieve the backlash elimination function of the transmission nut 2 proposed in this embodiment. In addition, when it is necessary for the transmission sleeve 4 to move linearly, a straight-tooth spline can be added to the circumferential surfaces of the first nut 21 and the second nut 22, and linear movement can be achieved through the cooperation between the straight-tooth spline and the external component. At this time, the force applied by the external component to the first guiding member 24 can be forward along the axis or forward in a rotational manner. In other embodiments, the first guiding 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 part of the first guiding member 24 is linearly guided, the first nut 21 and the second nut 22 can linearly move along the main body of the first guiding member 24. Further, straight splines can also be provided on the circumferential surfaces of the first nut 21 and the second nut 22 to improve the movement stability and load-bearing capacity of the first nut 21 and the second nut 22.

[0094] In some embodiments, when the guiding main body of the first guiding member 24 is helically guided, the first nut 21 and the second nut 22 can rotate along the main body, and similar technical effects can also be achieved in some implementation scenarios.

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

[0096] Regarding the first anti-disengagement part 25: In some embodiments as shown in Figure 3 After the first guiding member 24 is connected to the first nut 21 and the second nut 22, the first anti-disengagement part 25 includes two independent components and is respectively fixedly connected to both ends of the first guiding member 24 to achieve the function of limiting the movement range. The fixed connection method can be a detachable threaded connection, snap connection, etc., or a non-detachable method such as welding. In some embodiments, one end of the first guiding member 24 is fixedly connected to one first anti-disengagement part 25, where the fixed connection means pre-welding or integral molding, and the other end is detachably fixedly connected to another first anti-disengagement part 25, and similar technical effects have also been achieved.

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

[0098] In some embodiments, the inner circumferential surface of the first anti-disengagement part 25 is provided with straight splines and a fixing part for fixedly connecting to the first guiding member 24. The fixing part is in a groove shape and is provided at the protruding part of the straight splines on the inner circumferential surface of the first anti-disengagement part 25. The protruding part refers to the protruding part of the straight splines as shown in Figure 3 This setting increases the thickness from the bottom of the groove of the fixing part to the outer circumferential surface of the first anti-disengagement part 25. After the first guiding member 24 penetrates into the fixing part, bolts with a longer length can be used to fixedly connect the two, improving the connection strength between the first guiding member 24 and the fixing member and the operation stability of the drive nut 2.

[0099] In some embodiments, the first anti - detachment portion 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 thrust directly applied to the first nut 21 or the second nut 22 is realized by the first anti - detachment portion 25. Therefore, by increasing the contact area between the first anti - detachment portion 25 and the first nut 21 or the second nut 22, the pressure per unit area of the first nut 21 and the second nut 22 can be reduced, the risk of deformation of the first nut 21 and the second nut 22 due to excessive pressure from the first anti - detachment portion 25 can be lowered, and the overall stability can be improved.

[0100] Regarding the first guide rail portion 211 and the second guide rail portion 221: In the embodiment shown as Figure 3 below, the first guide rail portion 211 is in a groove shape and runs through the inner peripheral surface of the first nut 21, and the second guide rail portion 221 is in a groove shape and runs through the inner peripheral surface of the second nut 22. This connection method that only requires sliding the first guiding 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, the second nut 22 and the first guiding member 24.

[0101] In some embodiments, there is also at least one connection position for connecting with an external active component, and the connection position is provided on the first guiding member 24. In the embodiment shown as Figure 3 below, the connection position is a threaded hole, which is connected to the external active component through a bolt or a screw. The connection position can also be connected to the external active component by means such as welding and clamping.

[0102] In some other embodiments, the third guide rail portion 241 extends from one end of the first guiding member 24 to the other end, but does not run through the first guiding member 24. That is to say, it does not require the two openings at both ends of the third guide rail as shown in Figure 3 below. As long as one end of the third guide rail is provided with an opening for connecting with an external active component, such a setting can save processing procedures and reduce costs.

[0103] As shown in Figure 3 below, the connecting member is an ear piece 5. In fact, the connecting member can also be a sliding piece or other components. The transmission nut 2 is sleeved on the spline shaft. The ear piece 5 is connected to the lead screw 31 and the lead screw nut 32 and is previously arranged on the spline shaft. The ear piece 5 slides to the connection position through the third guide rail portion 241 and is fixedly connected to the first guiding member 24 at the installation position 242 through a bolt, realizing the transmission connection between the lead screw 31, the lead screw nut 32 and the transmission nut 2.

[0104] In some embodiments, it further includes at least one second elastic member, at least one second guiding member, and a second anti - detachment portion. The second guiding member passes through at least two sets of transmission nuts 2 to make them slidably connected. The second anti - detachment portion is fixedly connected to the second guiding member to limit the at least two sets of transmission nuts 2 to move only within a certain range. At least one second elastic member is disposed between at least two transmission nuts 2 and / or at least one second elastic member is disposed between the transmission nut 2 and the second anti - detachment portion. The second guiding member is directly or indirectly connected to the driving member 3 to drive the second guiding member to move, thereby realizing the screw drive in the above - mentioned other embodiments. This embodiment only needs to lengthen the length of the second guiding member to increase the number of transmission nuts 2 and can be used in embodiments under various different 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 (hereinafter, the helix angle refers to the above four 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. When the diameter is fixed, there is a negative correlation between the helix angle and the lead, that is, the smaller the helix angle, the larger the lead. Under the condition of fixed friction, when the transmission nut 2 is pushed to rotate in cooperation with an external component, the required applied force is correspondingly reduced. However, if the helix angle is adjusted to be close to 0 degrees, although the required force is reduced, when rotating a certain angle relatively, the length of the transmission nut 2 will increase significantly, thus occupying a large space and bringing many inconveniences to practical applications. On the contrary, if the helix angle is adjusted to be close to 45 degrees, although the required length of the transmission nut 2 is shorter when rotating a certain angle relatively, the requirement for surface roughness is significantly increased, and the requirement for the applied force is also correspondingly increased. Therefore, through experimental summary in some embodiments, in the embodiment with a helix angle of 13 degrees, the screw drive 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. The involute helical spline provides a larger contact area in transmitting torque and motion and also has advantages such as automatic centering, high installation accuracy, and high load - bearing capacity.

[0107] Regarding the first elastic member and the second elastic member: The functions of the first elastic member and the second elastic member are basically the same, and they are mainly used to provide a certain elastic force. The first elastic member or the second elastic member is composed of elastic components, which can be polymers such as rubber, or metal springs such as torsion springs and tension springs. In some embodiments, the first elastic member or the second elastic member is a wave spring 23. Compared with other springs, the wave spring 23 has a more compact structure and can provide stronger elastic force in a limited space, which is particularly suitable for occasions with limited installation space. In other embodiments, the first nut 21 and / or the second nut 22 are provided with spring grooves for accommodating the wave spring 23, which can prevent the spring from detaching and improve the space utilization rate. Further, in the embodiments with a single spring groove, the overall integration can be improved and the processing cost can be reduced.

[0108] As the second aspect of this specific embodiment, a solar device is proposed, which includes the above-mentioned spiral transmission assembly 6, and also includes a light-receiving member and a column 8. The spiral transmission assembly 6 is respectively connected to the light-receiving member and the column 8. When the spiral spline pair is separately arranged on the transmission nut 2 and the transmission sleeve 4, the central shaft 1 is fixedly connected to the column 8, and the transmission sleeve 4 is fixedly connected to the light-receiving member. When the spiral spline pair is separately arranged on the central shaft 1 and the transmission nut 2, the transmission sleeve 4 is fixedly connected to the column 8, and the central shaft 1 is fixedly connected to the light-receiving member.

[0109] As Figure 6 and Figure 7 shown, at this time the light-receiving member is a photovoltaic panel 7, which has two states of folding and tracking, and includes multiple groups of the above-mentioned spiral transmission assemblies 6. In addition, the light-receiving member can be a component that utilizes solar energy, such as a heat collecting tube or a concentrating trough.

[0110] When the solar device is stationary or performing solar tracking and is affected by external factors such as wind, the photovoltaic panel 7 will shake. When the photovoltaic panel 7 shakes, it will apply a force to the moving end of the spiral transmission assembly 6. The moving end of the spiral transmission assembly 6 transmits the force to the transmission nut 2, causing the first nut 21 or the second nut 22 that abuts against the moving end to have a tendency to move axially. Since an elastic member is provided in the transmission nut 2, 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 influence of the force brought by external factors such as wind on the spiral transmission assembly 6 is indirectly reduced, and the spiral transmission assembly 6 has the ability to buffer this kind of force. The shock absorption and buffering ability of the transmission nut 2 is not limited to its application in solar devices, and it can also be used in other structures that are easily affected by vibration or shaking.

[0111] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0112] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0113] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, terms such as "provided with", "connected", etc. should be understood in a broad sense. 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 directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0114] The above are only the preferred embodiments of the present utility model, and all equivalent changes and modifications made according to the scope of the present utility model patent shall fall within the scope covered by the present utility model.

Claims

1. A screw drive assembly, characterized in that: Comprising, Central axis, At least two sets of transmission nuts, and the at least two sets of transmission nuts are all sleeved on the central axis; At least one driving member for driving the transmission nut to move synchronously along the axis of the central axis under the limitation of the central axis; Transmission sleeve, sleeved on the outer peripheral surface of the at least two sets of transmission nuts; Helical spline pair, respectively arranged on the transmission nut and the transmission sleeve, and / or respectively arranged on the central axis and the transmission nut; When the driving member drives the transmission nut to move, under the action of the helical spline pair, the transmission sleeve and the central axis rotate relatively.

2. The screw drive assembly according to claim 1, wherein: The helical spline pair includes a first helical spline arranged on the outer peripheral surface of the central axis and a second helical spline arranged on the inner peripheral surface of the transmission nut and mating with the first helical spline; Or, The helical spline pair includes a third helical spline arranged on the outer peripheral surface of the transmission nut and a fourth helical spline arranged on the inner peripheral surface of the transmission sleeve and mating with the third helical spline.

3. The screw drive assembly according to claim 2, wherein: When the second helical spline is arranged on the inner peripheral surface of the transmission nut, a first straight guide is arranged on the inner peripheral surface of the transmission sleeve, and a second straight guide mating with the first straight guide is arranged on the outer peripheral surface of the transmission nut; When the third helical spline is arranged on the outer peripheral surface of the transmission nut, a third straight guide is arranged on the inner peripheral surface of the transmission nut, and a fourth straight guide mating with the third straight guide is arranged on the outer peripheral surface of the central axis.

4. The screw drive assembly according to claim 1, wherein: The driving member includes a lead screw and a lead screw nut mating with the lead screw; A chamber extending along the axial direction is arranged inside the central axis, a strip-shaped through hole is arranged on the side wall of the chamber, and the lead screw and the lead screw nut are arranged in the chamber; Further comprising a first connecting member, the first connecting member is movably arranged in the strip-shaped through hole, and the lead screw nut is connected to at least one of the transmission nuts through the first connecting member.

5. The screw drive assembly according to claim 4, characterized in that: One lead screw nut, one set of transmission nuts and the first connecting member connecting the lead screw nut and the transmission nut form a set of axial movement components, including at least two sets of axial movement 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 movement components mating with the first thread and the axial movement components mating with the second thread move away from or close to each other.

6. The screw drive assembly according to claim 5, characterized in that: When the third helical spline is arranged on the outer peripheral surface of the transmission nut, the transmission sleeve is fixedly connected by at least two unit sleeves. The fourth helical spline arranged on the inner peripheral surface of the transmission sleeve is adapted to the helical directions of the first thread and the second thread on the lead screw, and the helical directions of the fourth helical splines of adjacent unit sleeves are different.

7. The screw drive assembly according to claim 4, wherein: Further comprising a second connecting member, the second connecting member is connected to the first connecting member, and at least two sets of the transmission nuts are all connected to the second connection.

8. The screw drive assembly according to claim 1, wherein: The driving member includes a threaded sleeve and a gear, and the threaded sleeve is sleeved on the central axis; The outer peripheral surface of the threaded sleeve is provided with a third thread, and the two ends of the threaded sleeve are respectively connected with the transmission nuts; 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 in driving cooperation through the fourth thread and the third thread; The outer circumferential surface of the gear is provided with drive teeth for driving connection with an external power source; When the gear rotates, it drives the threaded sleeve and the drive nuts provided at both ends of the threaded sleeve to move synchronously along the central axis.

9. The screw drive assembly according to any one of claims 1-8, characterized in that: The drive nut includes a first nut, a second nut, a first elastic member, a first guiding member, and a first anti-disengagement portion, The first nut and the second nut are coaxially arranged. The first nut is provided with a first guide portion, and the second nut is provided with a second guide portion. The first elastic member is disposed between the first nut and the second nut; The first guiding member includes at least one connection position for connecting with the active member; the first guiding member sequentially passes through the first guide portion and the second guide portion, and is movably connected to the first nut and the second nut; The first anti-disengagement portion is fixedly connected to the first guiding member and is used to limit the movement range of the first nut and the second nut.

10. The screw drive assembly according to claim 9, characterized in that: A third guide portion is provided at a position of the first guiding member close to the axis of the drive nut. The third guide portion is used for mating connection with the active member, and the connection position is disposed on the third guide portion.

11. The screw drive assembly according to claim 1, wherein: It further includes at least one second elastic member, at least one second guiding member, and a second anti-disengagement portion. The second guiding member passes through the at least two sets of drive nuts to slidably connect the two. The second anti-disengagement portion is fixedly connected to the second guiding member to limit the at least two sets of drive nuts to only move within a certain range. The at least one second elastic member is disposed between the at least two drive nuts and / or the at least one second elastic member is disposed between the drive nut and the second anti-disengagement portion.

12. A solar energy device, characterized in that: It includes the screw drive assembly according to any one of claims 1 to 11 above, and further includes a light-receiving member and a column, and the screw drive assembly is respectively connected to the light-receiving member and the column.

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