Transmission assembly for cantilever and solar device

Abstract

The utility model relates to the field of mechanical transmission, in particular to a transmission assembly for a cantilever and a solar device. The transmission assembly comprises a main shaft, a transmission nut, a transmission sleeve, a screw pair and a guide structure. A mounting part fixedly connected with the outside is arranged at one end of the main shaft; the transmission nut sleeves the main shaft; the transmission sleeve sleeves the peripheral surface of the transmission nut and is used for mounting an external load; the screw pair comprises a first screw arranged on the outer circumferential surface of the transmission nut and a second screw arranged on the inner circumferential surface of the transmission sleeve; the guide structure comprises a first guide combination, and the first guide combination comprises a first guide part arranged on the main shaft and a second guide part arranged on the transmission nut. During use, the transmission nut does linear motion along the main shaft, the transmission sleeve rotates around the axis of the main shaft under the action of the screw pair, and when the main shaft rotates till the axis is parallel to the ground, at least the upper end of the first guide part in the vertical direction is in clearance fit with the second guide part.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of solar energy, especially a transmission assembly for cantilever use and a solar energy device. BACKGROUND

[0002] Solar energy is a clean energy, and its open use is paid more and more attention. For the use of the sun, there are solar energy devices through photo-thermal conversion and photovoltaic devices through photoelectric conversion. At present, in the photovoltaic device, in order to improve the utilization efficiency of solar energy, using a transmission shaft assembly to drive the photovoltaic to track the sunlight is the development trend of the photovoltaic device.

[0003] In order to ensure the utilization efficiency of solar energy, and reduce the requirements and influence of the photovoltaic device on the installation site, a cantilever type photovoltaic tracking support is proposed, that is, one end of the transmission shaft assembly is fixedly connected with a wall surface, a traditional column or the like, and the other end is suspended, and the photovoltaic panel is connected to the output end of the transmission shaft assembly. Although this cantilever type photovoltaic tracking support reduces the requirements of the installation site and is conducive to the popularization and promotion of photovoltaic, due to the fact that one end of the fixed part of the transmission shaft assembly is fixedly connected with the column and the other end is suspended, this single-sided fixed mode inevitably causes the transmission shaft assembly to be bent and deformed to a certain extent under the influence of gravity. Especially when the photovoltaic panel is tracked under the action of wind load and gravity, the deflection of the transmission shaft assembly is increased. At this time, if the movement continues, the transmission assembly may be expanded or clamped, and even the transmission components may be damaged.

[0004] Therefore, how to design a transmission assembly suitable for a cantilever type solar energy tracking device has become a technical problem to be solved. INVENTION CONTENTS

[0005] The utility model first proposes a transmission assembly for cantilever use to solve the above problems, and further proposes a solar energy device.

[0006] As a first aspect of the utility model, a transmission assembly for cantilever use is proposed, comprising,

[0007] A main shaft, one end of the main shaft is provided with a mounting part for fixed connection with the outside;

[0008] A transmission nut is sleeved on the main shaft;

[0009] A transmission sleeve is sleeved on the outer peripheral surface of the transmission nut, and the transmission sleeve is used for mounting an external load;

[0010] A screw pair, the screw pair comprises a first screw provided on the outer peripheral surface of the transmission nut and a second screw provided on the inner peripheral surface of the transmission sleeve;

[0011] a guide structure comprising a first guide combination, the first guide combination comprising a first guide part provided on the main shaft and a second guide part provided on the transmission nut;

[0012] In use, the transmission nut moves linearly along the main shaft, under the action of the screw pair, the transmission sleeve rotates around the axis of the main shaft, and when the main shaft rotates to the axis parallel to the ground, the at least downward end surface of the first guide part does not form a guide fit with the second guide part.

[0013] Preferably, if the first guide part is located on the horizontal side of the main shaft, the at least downward end surface of the first guide part does not form a guide fit with the second guide part;

[0014] Alternatively,

[0015] If the first guide part is provided on the vertical side of the main shaft, the at least top of the first guide part does not form a guide fit with the second guide part.

[0016] Preferably, the first guide part is a strip-shaped protrusion provided on the surface of the main shaft, the strip-shaped protrusion extends in a direction parallel to the axis of the main shaft, and the second guide part is a groove matched with the strip-shaped protrusion;

[0017] And / or,

[0018] The first guide part is a guide groove provided on the surface of the main shaft, the guide groove extends in a direction parallel to the axis of the main shaft, and the second guide part is a guide protrusion matched with the guide groove; and / or,

[0019] The first guide part is a first spline provided on the surface of the main shaft, and the second guide part is a second spline matched with the first spline.

[0020] Preferably, the transmission nut comprises a first nut, a second nut, a limiting piece and an elastic piece;

[0021] The first nut and the second nut are coaxially arranged and connected with the limiting piece in sequence, and the limiting piece is used to limit the maximum distance between the first nut and the second nut;

[0022] The elastic piece is arranged between the first nut and the second nut, and the elastic piece is used to make the first nut and / or the second nut have a tendency to move to a position where the distance between them is maximum.

[0023] Further, the second guide part is provided on the inner wall surface of the first nut and / or the second nut.

[0024] Optionally, the limiting member comprises a first end, a last end and a bearing guide part, the first end and the last end are sleeved on the main shaft, one end of the bearing guide part is connected with the first end, and the other end is connected with the last end, the first end and the last end are used for limiting the first nut and the second nut from the bearing guide part, under the action of external force, the first nut and the second nut can slide along the bearing guide part.

[0025] The second guide part is arranged on the inner wall surface of the first end and / or the last end.

[0026] Preferably, the transmission assembly further comprises a threaded sleeve, the threaded sleeve is sleeved on the main shaft, and at least one end of the threaded sleeve is connected with the transmission nut.

[0027] Further, the outer surface of the threaded sleeve is provided with a transmission thread,

[0028] The transmission assembly further comprises a first gear, the first gear is provided with a through hole for sleeving on the threaded sleeve, and the hole wall of the through hole is provided with an actuating thread matched with the transmission thread.

[0029] Optionally, the second guide part is arranged on the inner wall surface of the threaded sleeve.

[0030] Further, the transmission assembly further comprises a second guide combination, the second guide combination is symmetrically arranged with the first guide combination as a symmetric line.

[0031] Further, a line segment with the first guide combination and the second guide combination as end points passes through the axis of the main shaft.

[0032] As a second aspect of the utility model, a solar device is provided, which comprises a stand and a solar collector, and further comprises the transmission assembly as described above, the transmission assembly is fixedly connected with the stand through the mounting part, and the solar collector is fixedly connected to the transmission sleeve.

[0033] The utility model has the advantages that: the transmission efficiency is ensured, and the service life is improved.

[0034] 1. When the transmission assembly of the utility model is used, for the convenience of description, the transmission assembly is taken as the reference when the axis of the main shaft is parallel to the ground, at this time, the at least downward end face of the first guide part in the first guide combination of the guide structure is ingeniously set not to form the guide cooperation with the second guide part, that is, the at least downward end face of the first guide part does not form the contact with the second guide part, that is, the upper end of the first guide part in the first guide combination in the vertical direction forms the extrusion or contact with the upper end of the second guide part in the vertical direction, at this time, even if the main shaft exists the natural bending deformation because of the cantilever use, the guide structure will not produce any additional resistance to the sliding of the transmission nut relative to the main shaft, thereby, the transmission efficiency of the transmission assembly is ensured, at the same time, since the at least downward end face of the first guide part does not form the contact with the second guide part, the abrasion of the first guide combination is also reduced, and the service life of the transmission assembly of the utility model is improved.

[0035] 2. In the application, the setting positions of the first guide part and the second guide part are flexible, when the axis of the main shaft is parallel to the ground, the first guide part and the second guide part can be located on the horizontal direction side of the main shaft or the vertical direction side; and the first guide part can be a part independent of the main shaft or connected with the main shaft, or can be a part of the main shaft, for example, is the protrusion, the groove or the spline on the surface of the main shaft; when the first guide part is a part of the main shaft, the natural bending degree caused by the gravity of the main shaft can also be reduced, the smoothness of the transmission nut moving along the main shaft is ensured, and at the same time, the first guide part can be formed on the surface of the main shaft at one time when the main shaft is processed, so that the independent guide part does not need to be additionally purchased, and the cost is lower.

[0036] 3. In the application, when the first guide part adopts the first spline, it is beneficial to uniformly distribute the load borne by the transmission guide on the part of the outer surface of the main shaft, and the possible fatigue fracture of the first guide part and the main shaft caused by the use due to the setting of the single first guide part can be avoided, thereby the service life is improved.

[0037] 4. The transmission nut is composed of the first nut, the second nut and the elastic element arranged between the first nut and the second nut, the spiral pair on the first nut and the second nut can be respectively abutted against the transmission sleeve with different side surfaces by the elastic element, thereby the machining precision requirement of the spiral pair is reduced; when the transmission sleeve needs to be driven to rotate around the main shaft or the external load is subjected to the external force so that the transmission sleeve has the tendency to rotate with the main shaft, the impact force can be absorbed by the elastic element, the spiral pair of the transmission assembly of the application is avoided from being damaged due to the too large instantaneous force, and the service life and the stability of the transmission of the transmission assembly of the application are ensured.

[0038] 5. When the transmission assembly proposed in this application is further provided with a second guide assembly, the specific structure of the second guide assembly can be the same as or different from that of the first guide assembly; in particular, when the second guide assembly and the first guide assembly are symmetrically arranged with the perpendicular bisector of the line connecting the two as the line of symmetry, the force between the main shaft and the transmission nut can be balanced, avoiding damage to the main shaft caused by clockwise or counterclockwise torque, and also ensuring the service life and transmission smoothness of the transmission assembly proposed in this application. Attached Figure Description

[0039] Figure 1 This is an exploded view of the transmission component in a specific embodiment.

[0040] Figure 2 Front view of the drive nut, threaded sleeve, and ring sleeve fixedly connected and fitted onto the spindle.

[0041] Figure 3 for Figure 2 A side view of the first embodiment.

[0042] Figure 4 for Figure 2 A side view of the second embodiment.

[0043] Figure 5 for Figure 2 A side view of the third implementation method.

[0044] Figure 6 This is an exploded view of the transmission nut in a specific implementation.

[0045] Figure 7 A schematic diagram of a cantilevered biaxial solar energy device in a specific embodiment.

[0046] in:

[0047] 1. Transmission assembly; 11. Main shaft; 111. First guide section;

[0048] 12. Transmission nut; 121. Second guide part; 122. First helix; 123. First nut; 124. Second nut; 125. Limiting element; 1251. Head end; 1252. End end; 1253. Supporting part; 126. Elastic element;

[0049] 13. Transmission sleeve; 131. Second spiral;

[0050] 14. Threaded sleeve; 15. Ring sleeve; 16. First gear; 17. Second gear; 18. Power source; 19. Gearbox;

[0051] 2. Photovoltaic panels; 3. Supporting columns. Detailed Implementation

[0052] The utility model will be made further detailed explanation in combination with specific drawings.

[0053] As Figures 1 to 6 shown, as the first aspect of the utility model, a transmission assembly 1 used for cantilever is provided, comprising,

[0054] A main shaft 11, one end of the main shaft 11 is equipped with the installation part for with external fixed connection;

[0055] Transmission nut 12, the main shaft 11 of the sleeve is equipped;

[0056] Transmission sleeve 13, the transmission nut 12 outer circumferential surface of the sleeve is equipped, and the transmission sleeve 13 is used for installing external load;

[0057] Screw pair, the screw pair includes the first screw 122 of the transmission nut 12 outer circumferential surface and the second screw 131 of the transmission sleeve 13 inner circumferential surface;

[0058] Guide structure, the guide structure includes first guide combination, and the first guide combination includes the first guide part 111 on the main shaft 11 and the second guide part 121 on the transmission nut 12;

[0059] When using, the transmission nut 12 does linear motion along main shaft 11, under the action of the screw pair, the transmission sleeve 13 rotates around the axis of the main shaft 11, and when the main shaft 11 rotates to the axis and parallel to the ground, at least the downward end surface in the first guide part 111 and the second guide part 121 do not constitute guide cooperation.

[0060] It should be noted that in the embodiment, the proposed main shaft 11 refers to a columnar object that can extend along the axis of the main shaft 11 to meet the length requirement of the transmission assembly 1. In order to enable the transmission nut 12 and the transmission sleeve 13 to be sleeved on the main shaft 11, in the embodiment, the transmission nut 12 and the transmission sleeve 13 are both columnar objects provided with a through hole along the axis thereof. In order to enable the transmission sleeve 13 to be actuated by the transmission nut 12 when the transmission nut 12 moves along the axis of the main shaft 11, the helix angle of the screw pair should be inconsistent with the helix angle of the movement track formed by superimposing the rotation of the transmission nut 12 when the transmission nut 12 moves along the axis of the main shaft 11. The helix angle of the movement track formed by superimposing the rotation of the transmission nut 12 when the transmission nut 12 moves along the axis of the main shaft 11 is subject to the guide structure, that is, when the guide structure is a straight guide parallel to the axis of the main shaft 11, the helix angle of the rotation track formed by the rotation of the transmission nut 12 when the transmission nut 12 moves along the axis of the main shaft 11 is zero, that is, the transmission nut 12 only moves along the axis of the main shaft 11 without rotating relative to the main shaft 11 (i.e., the aforementioned rotation); and when the guide structure is a helical guide around the surface of the main shaft 11, the transmission nut 12 will rotate relative to the main shaft 11 around the axis of the main shaft 11 (i.e., the aforementioned rotation) under the action of the guide structure when the transmission nut 12 moves along the axis of the main shaft 11. At this time, the helix angle of the guide structure should be inconsistent with the helix angle of the screw pair to ensure that the transmission sleeve 13 can be rotated relative to the main shaft 11 by the transmission nut 12.

[0061] It should be understood that in the embodiment, since the transmission nut 12 is sleeved on the main shaft 11 and the transmission nut 12 and the transmission sleeve 13 form a helical fit, when the transmission sleeve 13 and the main shaft 11 are coaxially defined, the transmission nut 12 is also defined to be coaxial with the main shaft 11, that is, the guide structure of the present application can only have a guiding effect without a bearing effect.

[0062] At the same time, it should also be understood that in the embodiment, only in order to enable clearer understanding and expression, the limitation of "and when the main shaft 11 is rotated to the axis parallel to the ground" is also understood as the end face of the first guide part 111 facing forward and / or the end face facing backward not forming a guide fit with the second guide part 121, or the end face of the first guide part 111 facing left and / or the end face facing right not forming a guide fit with the second guide part 121, that is, when the main shaft 11 is in a vertical state, how to express depends on the definition of the front view.

[0063] It should be noted that the downward end surface of the first guide portion 111 refers to the outer surface of the first guide portion 111 that faces the ground when the axis of the main shaft 11 is parallel to the ground.

[0064] In order to ensure that the transmission nut 12 can drive the transmission sleeve 13 to rotate relative to the main shaft 11 through the screw pair when the transmission nut 12 moves along the main shaft 11, and in order to ensure that at least the downward end surface of the first guide portion 111 does not form a guide fit with the second guide portion 121, since the transmission nut 12 is sleeved on the main shaft 11, the specific parts of the two do not form a guide fit, that is, the corresponding parts are spaced apart, that is, the distance between the surfaces of the corresponding parts is greater than 0. In this embodiment, for the first guide portion 111, when the main shaft 11 is driven to rotate by an external transmission mechanism to an axis parallel to the ground when the transmission assembly 1 proposed in this embodiment is used, the positional relationship between the first guide portion 111 and the main shaft 11 and the specific fit with the second guide portion 121 should be:

[0065] If the first guide portion 111 is located on the horizontal side of the main shaft 11, at this time, according to the first guide portion 111, if the first guide portion 111 is a strip-shaped protrusion or a key tooth in the spline on the surface of the main shaft 11, at least the downward end surface of each surface of the first guide portion 111 needs to not form a guide fit with the second guide portion 121, that is, the downward surface of the first guide portion 111 does not form a surface contact with the second guide portion 121; and when the first guide portion 111 is a guide groove or a key groove in the spline on the surface of the main shaft 11, at least the downward end surface of each surface of the first guide portion 111 needs to not form a guide fit with the second guide portion 121, that is, the downward surface of the first guide portion 111 does not form a surface contact with the second guide portion 121; at this time, by not forming a guide fit between at least the downward surface of the first guide portion 111 and the second guide portion 121, the natural bending deformation of the main shaft 11 under the action of gravity is allowed, so that the first guide portion 111 and the second guide portion 121 are not stuck, and the smoothness of the guide is ensured.

[0066] When the first guide portion 111 is located on the vertical side of the main shaft 11, at this time, at least the top of the first guide portion 111 does not form a guide fit with the second guide portion 121; at this time, by spacing apart at least the top of the first guide portion 111 and the second guide portion 121, the natural bending deformation of the main shaft 11 under the action of gravity is also allowed, so that the first guide portion 111 and the second guide portion 121 are not stuck, and the smoothness of the guide is ensured.

[0067] It should be understood that when the first guide part 111 is arranged on the vertical side of the main shaft 11, the first guide part 111 can be a protrusion on the main shaft 11, and in this case, the top part of the embodiment is understood as the upper end surface of the protrusion. Alternatively, the first guide part 111 can be a groove on the main shaft 11, and in this case, the top part of the embodiment is understood as the groove bottom surface.

[0068] In the embodiment, the at least downward end surface of the first guide part 111 is not guided by the second guide part 121. When the main shaft 11 is naturally bent due to deformation under the action of gravity, the first guide part 111 and the second guide part 121 are not locked.

[0069] Of course, the above-mentioned two position relationships between the first guide part 111 and the main shaft 11 and the specific cooperation with the second guide part 121 can be independently implemented or simultaneously implemented.

[0070] Further, in the embodiment, the specific structure of the first guide part 111 can include but is not limited to the following modes in the case of ensuring that the guide structure has a helix angle that is inconsistent with the helix angle of the helical pair.

[0071] The first mode is an embodiment of the embodiment, the first guide part 111 is a strip-shaped protrusion arranged on the surface of the main shaft 11, the strip-shaped protrusion extends in a direction parallel to the axis of the main shaft 11, and the second guide part 121 is a groove matched with the strip-shaped protrusion.

[0072] The second mode is another embodiment of the embodiment, the first guide part 111 is a groove arranged on the surface of the main shaft 11, the groove extends in a direction parallel to the axis of the main shaft 11, and the second guide part 121 is a protrusion matched with the groove.

[0073] The third mode is another embodiment of the embodiment, the first guide part 111 is a first spline arranged on the surface of the main shaft 11, and the second guide part 121 is a second spline matched with the first spline.

[0074] It should be noted that in the embodiment, although only the above-mentioned three modes are described, it should be understood that any simple shape change of the guide structure based on the idea of the present technology is within the protection scope of the present application.

[0075] Meanwhile, the above-mentioned three modes of the embodiment can be implemented independently or in any combination.

[0076] Further, in the embodiment, to reduce the machining precision requirement of the screw pair, the transmission nut 12 comprises a first nut 123, a second nut 124, a limiting member 125 and an elastic member 126; the first nut 123 and the second nut 124 are coaxially arranged and connected with the limiting member 125 in sequence, the limiting member 125 is used to limit the maximum distance between the first nut 123 and the second nut 124; the elastic member 126 is arranged between the first nut 123 and the second nut 124, and the elastic member 126 is used to make the first nut 123 and / or the second nut 124 have a tendency to move to the position where the distance between them is the largest.

[0077] By using the elastic member 126, the first screw 122 arranged on the first nut 123 and the first screw 122 arranged on the second nut 124 respectively form a cooperation with the different side surfaces of the second screw 131 arranged in the transmission sleeve 13 through the different side surfaces, so that the width of the first screw 122 can be slightly smaller than the width of the second screw 131 along the circumferential direction of the main shaft 11 in any cross section of the transmission assembly 1 proposed in the embodiment, which not only ensures the reliability of transmission, but also reduces the machining cost.

[0078] It should be noted that in the scheme in which the transmission nut 12 comprises the first nut 123, the second nut 124, the limiting member 125 and the elastic member 126, the second guide part 121 can be arranged on the inner wall surface of the first nut 123, or on the inner wall surface of the second nut 124, or arranged on the inner wall surface of the first nut 123 and the inner wall surface of the second nut 124 at the same time.

[0079] Further, in the embodiment as shown in the figure, Figure 5 the limiting member 125 comprises a first end 1251, a second end 1252 and a bearing guide part 1253, the first end 1251 and the second end 1252 are sleeved on the main shaft 11; one end of the bearing guide part 1253 is connected with the first end 1251, and the other end is connected with the second end 1252, the first end 1251 and the second end 1252 are used to limit the first nut 123 and the second nut 124 from being separated from the bearing guide part 1253, under the action of external force, the first nut 123 and the second nut 124 can slide along the bearing guide part 1253.

[0080] When the limiting member 125 includes a head end 1251 and a tail end 1252, the second guide portion 121 can be provided on the inner wall surface of the first nut 123 and the second nut 124, or the second guide portion 121 can be provided only on the inner wall surface of the head end 1251, or the second guide portion 121 can be provided only on the inner wall surface of the tail end 1252, or the second guide portion 121 can be provided on the inner wall surface of both the head end 1251 and the tail end 1252.

[0081] Although this application describes that the second guide portion 121 can be provided on the inner wall surface of the first nut 123 and the second nut 124, or on the inner wall surface of the first end 1251 and the last end 1252, it should be understood that the second guide portion 121 can also be provided on the inner wall surface of the first nut 123 and the second nut 124, as well as on the inner wall surface of the first end 1251 and the last end 1252.

[0082] To better drive the transmission nut 12 to move along the axis of the main shaft 11 via the power source 18, such as... Figure 1 As shown, the transmission assembly 1 proposed in this embodiment also includes a threaded sleeve 14, which is sleeved on the main shaft 11, and at least one end of the threaded sleeve 14 is connected to the transmission nut 12.

[0083] In such Figure 2 In the embodiment shown, a ring sleeve 15 is also included. The ring sleeve 15, the threaded sleeve 14 and the transmission nut 12 are coaxially fixedly connected in sequence. At this time, the second guide part 121 is only provided on the inner circumferential surface of the ring sleeve 15 and the inner circumferential surface of the transmission nut 12.

[0084] When the transmission sleeve 13 is composed of multiple segments, the power source 18 can be located between two adjacent transmission sleeve segments 13. Ideally, the threaded sleeve 14 has a transmission thread on its outer surface. In this case, the transmission assembly 1 proposed in this embodiment also includes a first gear 16. The first gear 16 has a through hole for fitting into the threaded sleeve 14. The wall of the through hole has an actuating thread that mates with the transmission thread. The power source 18 drives the first gear 16, and the threaded engagement between the transmission thread on the wall of the through hole in the first gear 16 and the transmission thread on the outer circumferential surface of the threaded sleeve 14 enables the power source 18 to drive the threaded sleeve 14 and the transmission nut 12 to move synchronously along the axis of the main shaft 11 via the first gear 16. Figure 1 In the embodiment shown, the power source 18 is a geared motor installed in the gearbox 19, and also includes a second gear 17. The geared motor transmits power to the first gear 16 through the second gear 17, thereby enabling the first gear 16 to drive the threaded sleeve 14 to move.

[0085] It should be noted that when the threaded sleeve 14 is provided, the second guide part 121 can also be provided on the inner wall surface of the threaded sleeve 14.

[0086] It should be noted that in the above description of the embodiment, only the first guide part 111 and the second guide part 121 are described as being necessarily in guide cooperation in the clockwise direction or the counterclockwise direction along the circumference of the main shaft 11, while the opposite side can also be in guide cooperation, for example, when the axis of the main shaft 11 is parallel to the ground, and the first guide part 111 is located on the upper surface of the main shaft 11 in the vertical direction, the left and right surfaces of the first guide part 111 facing the horizontal side can both be in guide cooperation with the second guide part 121; or can not be in guide cooperation, i.e., the spacing is set, for example, when the axis of the main shaft 11 is parallel to the ground, and the first guide part 111 is located on the horizontal side of the main shaft 11, at this time, as described above, at least the downward surface of the first guide part 111 is not in guide cooperation with the second guide part 121, further, when the horizontal end of the first guide part 111 is still not in guide cooperation with the second guide part 121, the first guide part 111 will have a gap with the second guide part 121 in the counterclockwise or clockwise direction, which will cause the transmission sleeve 13 and the transmission nut 12 to have a space for rotation around the main shaft 11, at this time, in order to eliminate the space for rotation, a plurality of first guide combinations can be provided to form cooperation on different sides, or a second guide combination different from the first guide combination can be used.

[0087] In order to ensure the coaxiality of the transmission nut 12 and the main shaft 11, the second guide combination and the first guide combination are symmetrically arranged with the perpendicular bisector of the line connecting the two as the symmetry line, at this time, even if the parts in cooperation between the first guide combination and the parts in cooperation between the second guide combination form a tight fit, the repulsive force between the first guide part 111 and the second guide part 121 in the first guide combination is equal to the repulsive force in the second guide combination, i.e., no torsion will be generated on the connecting part of the transmission nut 12 and the main shaft 11.

[0088] Further, the line segment with the first guide combination and the second guide combination as endpoints passes through the axis of the main shaft 11.

[0089] As a second aspect of the present application, a solar energy device is provided, which comprises a stand 3 and a solar energy collector, and further comprises the transmission assembly 1 as described above, the transmission assembly 1 is fixedly connected to the stand 3 through the mounting part, and the solar energy collector is fixedly connected to the transmission sleeve 13. The solar energy collector can be a heat collector, a photovoltaic panel 2, or other components that can utilize solar energy, as shown in the embodiment. Figure 6 In the embodiment shown, the solar energy collector is a photovoltaic panel 2.

[0090] The utility model discloses beneficial effect is: ensure the transmission efficiency, improve the service life.

[0091] 1, in using the transmission assembly 1 that the utility model discloses, for being convenient for description, with the axis of transmission assembly 1 movement to the axle of main shaft 11 and ground parallel is as reference, at this time, ingeniously set up the at least downward end face of first guide portion 111 in first guide combination in guide structure with second guide portion 121 not constitute guide cooperation, namely the at least downward end face of first guide portion 111 does not constitute contact with second guide portion 121, at this time, even if main shaft 11 because of cantilevered use and exist natural bending deformation, guide structure also will not produce any additional resistance to the sliding of transmission nut 12 relative to main shaft 11, thereby, ensure the transmission efficiency of transmission assembly 1, simultaneously, because the at least downward end face of first guide portion 111 does not constitute contact with second guide portion 121, also reduced the wear and tear of first guide combination, improved the service life of transmission assembly 1 that the utility model discloses.

[0092] 2, in the application, the setting position of first guide portion 111 and second guide portion 121 is flexible, when the axis of main shaft 11 is parallel with ground level, first guide portion 111 and second guide portion 121 can be located on the horizontal direction side of main shaft 11, also can be located on the vertical direction side, and first guide portion 111 can be the component that is independent of main shaft 11 and is connected with main shaft 11, also can be the part of main shaft 11, for example, is the projection, recess or spline of main shaft 11 surface, when first guide portion 111 is the part of main shaft 11, can also reduce the natural bending degree of main shaft 11 caused by gravity, ensure the smoothness of transmission nut 12 movement along main shaft 11, simultaneously, also can set first guide portion 111 once forming on the surface of main shaft 11 when processing main shaft 11, need not extra purchase independent guide component, make cost be lower.

[0093] 3, in the application, when first guide portion 111 adopts first spline, it is favorable to distribute the load of transmission guide bearing evenly on the part of outer surface of main shaft 11, can avoid setting single first guide portion 111 and cause the possible fatigue fracture of first guide portion 111 and main shaft 11 because of use, thereby improved the service life.

[0094] 4. The transmission nut 12 is composed of a first nut 123, a second nut 124, and an elastic element 126 disposed between the first nut 123 and the second nut 124. The elastic element 126 allows the helical pairs on the first nut 123 and the second nut 124 to abut against the transmission sleeve 13 on different sides, thereby reducing the machining accuracy requirements of the helical pairs. When it is necessary to drive the transmission sleeve 13 to rotate around the main shaft 11 or when the external load is subjected to external force and the transmission sleeve 13 has a tendency to rotate equivalent to the main shaft 11, the elastic element 126 can absorb the impact force, avoiding damage to the helical pairs of the transmission assembly 1 proposed in this application due to excessive instantaneous force, and ensuring the service life and transmission smoothness of the transmission assembly 1 proposed in this application.

[0095] 5. When the transmission assembly 1 proposed in this application is further provided with a second guide assembly, the specific structure of the second guide assembly can be the same as or different from that of the first guide assembly; in particular, when the second guide assembly and the first guide assembly are symmetrically arranged with the perpendicular bisector of the line connecting the two as the line of symmetry, the force between the main shaft 11 and the transmission nut 12 can be balanced, avoiding damage to the main shaft 11 caused by clockwise or counterclockwise torque, and also ensuring the service life and transmission smoothness of the transmission assembly 1 proposed in this application.

[0096] 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 exemplary embodiments according to the present 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.

[0097] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0098] In the description of the utility model, it is necessary to explain that, unless another explicit provision and limitation, the term "is equipped with" "connection" and the like, should do the broad sense understanding, for example "connection", can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0099] The above only is the preferred embodiment of the utility model, and all the changes and modifications made according to the patent range of the utility model should belong to the coverage range of the utility model.

Claims

1. A transmission component used in a cantilever, characterized in that: Comprising, a main shaft, one end of which is provided with a mounting portion for fixed connection with the outside; a transmission nut, which is sleeved on the main shaft; a transmission sleeve, which is sleeved on the outer circumferential surface of the transmission nut and is used for mounting external loads; a screw pair, which comprises a first screw provided on the outer circumferential surface of the transmission nut and a second screw provided on the inner circumferential surface of the transmission sleeve; a guide structure, which comprises a first guide combination, the first guide combination comprising a first guide portion provided on the main shaft and a second guide portion provided on the transmission nut; In use, the transmission nut moves linearly along the main shaft, and under the action of the screw pair, the transmission sleeve rotates around the axis of the main shaft, and when the main shaft rotates to the state that the axis is parallel to the ground, the at least downward end surface of the first guide portion does not form a guide fit with the second guide portion.

2. The transmission assembly of claim 1, wherein: If the first guide portion is located on the horizontal side of the main shaft, the at least downward end surface of the first guide portion does not form a guide fit with the second guide portion; Or, If the first guide portion is provided on the vertical side of the main shaft, the at least top of the first guide portion does not form a guide fit with the second guide portion.

3. The transmission assembly of claim 1, wherein: The first guide portion is a strip-shaped protrusion provided on the surface of the main shaft, which extends in a direction parallel to the axis of the main shaft, and the second guide portion is a groove matched with the strip-shaped protrusion; And / or, The first guide portion is a guide groove provided on the surface of the main shaft, which extends in a direction parallel to the axis of the main shaft, and the second guide portion is a guide protrusion matched with the guide groove; And / or, The first guide portion is a first spline provided on the surface of the main shaft, and the second guide portion is a second spline matched with the first spline.

4. The transmission assembly of claim 1, wherein: The transmission nut comprises a first nut, a second nut, a limiting member and an elastic member; The first nut and the second nut are coaxially arranged and connected with the limiting member in sequence, and the limiting member is used to limit the maximum distance between the first nut and the second nut; The elastic member is arranged between the first nut and the second nut, and is used to make the first nut and / or the second nut have a tendency to move to the position where the distance between them is the largest.

5. The transmission assembly of claim 4, wherein: The second guide portion is provided on the inner wall surface of the first nut and / or the second nut.

6. The transmission assembly of claim 4, wherein: The limiting member comprises a leading end, a trailing end and a guide receiving portion, the leading end and the trailing end are both sleeved on the main shaft, one end of the guide receiving portion is connected with the leading end, and the other end is connected with the trailing end, the leading end and the trailing end are used to limit the first nut and the second nut from being separated from the guide receiving portion, and under the action of external force, the first nut and the second nut can slide along the guide receiving portion; The second guide portion is provided on the inner wall surface of the leading end and / or the trailing end.

7. The transmission assembly of claim 1, wherein: It also comprises a threaded sleeve, which is sleeved on the main shaft, and at least one end of the threaded sleeve is connected with the transmission nut.

8. The transmission assembly of claim 7, wherein: The outer surface of the threaded sleeve is provided with a transmission thread, The first gear is provided with a through hole for sleeving the threaded sleeve, and the hole wall of the through hole is provided with an actuating thread matched with the transmission thread.

9. The transmission assembly of claim 7, wherein: The second guide part is arranged on the inner wall surface of the threaded sleeve.

10. A transmission assembly as claimed in any one of claims 1 to 9, wherein: The second guide assembly is symmetrically arranged with the first guide assembly as a symmetric line.

11. The transmission assembly of claim 10, wherein: The line segment with the first guide assembly and the second guide assembly as endpoints passes through the axis of the main shaft.

12. A solar energy device, characterized by: The column and the solar collector are further provided with the transmission assembly according to any one of claims 1 to 11, the transmission assembly is fixedly connected with the column through the mounting part, and the solar collector is fixedly connected with the transmission sleeve.

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