Auxiliary slewing reducer for photovoltaic support

Abstract

The present invention relates to a secondary rotary reducer for a photovoltaic support, comprising a housing, a reduction transmission mechanism, an input shaft and an output shaft arranged in the housing; the output shaft comprises an output inner shaft and an output outer shaft; the outer end of the output inner shaft is inserted into the inner end of the output outer shaft, and a torque limiting mechanism is arranged between the output inner shaft and the output outer shaft, and the output outer shaft forms a transmission connection with the reduction transmission mechanism; the torque transmitted by the output inner shaft is less than the torque setting range of the torque limiting mechanism, and the output inner shaft rotates synchronously with the output outer shaft through the torque limiting mechanism; the torque transmitted by the output inner shaft is greater than the torque setting range of the torque limiting mechanism, and the output inner shaft and the output outer shaft rotate relatively independently. When the torque driven by the photovoltaic panel main shaft on the active side to rotate the input inner shaft is greater than a preset value, the output outer shaft and the output inner shaft can be directly separated, so that the input inner shaft rotates independently, thereby preventing the reduction mechanism in the reducer from being damaged.

Description

Technical Field

[0001] The invention relates to the field of photovoltaic power generation, and in particular to a secondary rotary reducer for a photovoltaic bracket. Background Art

[0002] In the photovoltaic power generation industry, the multi-point drive slewing system is a technical solution that has received more attention in recent years. In the multi-point drive slewing system, the photovoltaic bracket needs to rely on the multi-point drive slewing system to adjust the angle of the photovoltaic mounting panel. The multi-point drive slewing system mainly includes a main slewing reducer and multiple auxiliary slewing reducers.

[0003] In the existing multi-point drive rotary system, the main rotary reducer and the auxiliary rotary reducer have the same principle and structure, but the installation positions in the photovoltaic bracket are different. The main rotary reducer and the auxiliary rotary reducer both include an input shaft and an output shaft, and a worm gear transmission mechanism is arranged between the input shaft and the output shaft. The characteristic of this reduction mechanism is that the input shaft can drive the output shaft to rotate through the worm gear transmission mechanism, but the output shaft cannot drive the input shaft to rotate in the opposite direction through the worm gear transmission mechanism.

[0004] Multiple groups of rotatable photovoltaic panels are arranged on each row of photovoltaic brackets, and each group of photovoltaic panels is rotatably installed on the column through a main shaft;

[0005] In each row of photovoltaic brackets, both ends of the output shaft of the main rotary reducer are respectively connected to the main shafts of adjacent photovoltaic panels to drive the adjacent photovoltaic panels to rotate. The auxiliary rotary reducer is installed on one side or both sides of the main rotary reducer and is separated from the main rotary reducer by a group of photovoltaic panels. The output shaft of the auxiliary rotary reducer is connected to the main shafts of two adjacent photovoltaic panels, and the input shaft of the main rotary reducer and the auxiliary rotary reducer rely on a transmission shaft to achieve synchronous rotation.

[0006] Since the synchronous drive of the main and auxiliary rotations depends on the coordination of the synchronous transmission shaft between the main and auxiliary input shafts, and at the same time, the relative angle of the main shafts on both sides of the auxiliary rotation is fixed, that is, the rotation of the main shafts on the left and right sides of the auxiliary rotation is synchronous, when the synchronous transmission shaft system fails for some reason, the auxiliary rotation input shaft transmission fails and stops rotating, while the main rotation reducer continues to rotate, and the two output shafts of the main rotation reducer can still be transmitted through the main shaft, which will cause a huge torque to be formed at both ends of the main shaft between the main and auxiliary rotations, thereby damaging the main shaft or auxiliary rotation equipment. Summary of the invention

[0007] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a secondary rotary reducer for a photovoltaic bracket, so as to solve the problem that when the power input at the output shaft end of the current secondary rotary reducer fails, the main shaft on one side of the output shaft continues to transmit power to the main shaft on the other side through the output shaft of the secondary rotary reducer, causing damage to the secondary rotary reducer.

[0008] The technical solution adopted by the present invention to solve its technical problem is:

[0009] Provided is a secondary slewing reducer for a photovoltaic support, comprising:

[0010] A housing, wherein a reduction transmission mechanism, an input shaft and an output shaft are arranged in the housing, and the input shaft drives the output shaft to rotate through the reduction transmission mechanism;

[0011] The output shaft comprises an output inner shaft and an output outer shaft, the outer end of the output inner shaft is suitable for transmission connection with the main shaft of the active side photovoltaic panel bracket, and the outer end of the output outer shaft is suitable for transmission connection with the main shaft of the driven side photovoltaic panel bracket; the outer end of the output inner shaft is inserted into the inner end of the output outer shaft, and a torque limiting mechanism is provided between the output inner shaft and the output outer shaft, and the output outer shaft forms a transmission connection with the reduction transmission mechanism;

[0012] When the torque transmitted by the output inner shaft is less than the torque setting range of the torque limiting mechanism, the output inner shaft rotates synchronously with the output outer shaft through the torque limiting mechanism;

[0013] When the torque transmitted by the output inner shaft is greater than the torque setting range of the torque limiting mechanism, the output inner shaft and the output outer shaft rotate relatively independently.

[0014] Further, the torque limiting mechanism includes a steel ball, a spring, a locking bolt and a plurality of ball grooves;

[0015] The ball grooves are arranged in a ring shape on the outer wall of the output inner shaft. A mounting hole is provided on the output outer shaft. A steel ball, a spring and a locking bolt are arranged in the mounting hole from bottom to top. The locking bolt is threadedly connected to the mounting hole and presses the steel ball against the spring. When the lower part of the steel ball is located in the ball groove of the output inner shaft, the output outer shaft drives the output inner shaft to rotate synchronously through the steel ball. When the steel ball moves up and leaves the ball groove, the output inner shaft rotates independently.

[0016] Furthermore, a pair of first sliding sleeves are arranged between the output outer shaft and the housing, and the two first sliding sleeves are located on both sides of the mounting hole of the output outer shaft;

[0017] A pair of second sliding sleeves are arranged between the output inner shaft and the output outer shaft, and the two second sliding sleeves are located on both sides of the ball groove of the output inner shaft.

[0018] Furthermore, an outer shaft mounting hole is provided on one side of the outer shell, an end cover is provided on the other side of the outer shell, an inner shaft mounting hole is provided on the end cover, the output outer shaft passes through the outer shaft mounting hole and forms a step opening with the outer shaft mounting hole, and the output inner shaft passes through the inner shaft mounting hole of the end cover and forms a step opening with the inner shaft mounting hole.

[0019] Further, the reduction transmission mechanism includes a first bevel gear, a second bevel gear, a gear shaft, a first spur gear, a second spur gear, a worm and a worm wheel;

[0020] The first bevel gear is arranged on the input shaft, the second bevel gear and the first spur gear are respectively fixedly arranged on the gear shaft, the second spur gear is fixedly arranged on the worm, the worm wheel is fixedly connected to the output outer shaft, the worm and the worm wheel cooperate, the two spur gears are meshed, and the two bevel gears are meshed; the input shaft drives the output outer shaft to rotate in sequence through the gear shaft, the worm and the worm wheel.

[0021] Furthermore, the ball groove is replaced by any one of a V-shaped groove, a trapezoidal groove, and a rectangular groove.

[0022] Furthermore, the worm gear and the output outer shaft are an integrated structure;

[0023] The worm wheel is a fan-shaped structure, so that the worm wheel drives the output outer shaft to rotate at an angle ranging from 30 to 60 degrees.

[0024] Furthermore, between the spring and the steel ball, the spring abuts against the steel ball via a slider.

[0025] The beneficial effects of the present invention are:

[0026] The auxiliary rotary reducer for the photovoltaic bracket of the present invention divides the output shaft into an output outer shaft and an output inner shaft, and controls the torque transmission between the output outer shaft and the output inner shaft through a torque limiting mechanism. When the input shaft of the auxiliary rotary reducer stops operating, when the torque of the photovoltaic panel main shaft on the active side driving the input inner shaft to rotate is greater than a preset value, the output outer shaft and the output inner shaft can be directly separated, so that the input inner shaft rotates independently, thereby preventing the reduction mechanism in the reducer from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described below in conjunction with the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of a secondary rotary reducer for a photovoltaic support of the present invention;

[0029] Figure 2 and Figure 3 It is a cross-sectional view of the auxiliary rotary reducer for the photovoltaic support of the present invention;

[0030] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0031] Figure 5 This is a schematic diagram of a single-row photovoltaic bracket;

[0032] in,

[0033] 2. Auxiliary rotary reducer, 21. Housing, 22. End cover, 23. First sliding sleeve, 24. Second sliding sleeve;

[0034] 30. input shaft, 311. output outer shaft, 312. output inner shaft, 32. first bevel gear, 33. second bevel gear, 34. gear shaft, 35. first spur gear, 36. second spur gear, 37. worm, 38. worm wheel;

[0035] 4. torque limiting mechanism, 41. steel ball, 42. spring, 43. locking bolt, 44. ball groove, 45. slider;

[0036] 5. Main rotary reducer;

[0037] 61. Synchronous axis, 62. Main axis. DETAILED DESCRIPTION

[0038] The present invention will now be further described in conjunction with specific embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0039] like Figures 1 to 4 As shown, a secondary rotary reducer for a photovoltaic support includes

[0040] A housing 21, wherein a reduction transmission mechanism, an input shaft 30 and an output shaft are disposed in the housing 21, and the input shaft 30 drives the output shaft to rotate through the reduction transmission mechanism;

[0041] The output shaft includes an output inner shaft 312 and an output outer shaft 311, the outer end of the output inner shaft 312 is suitable for transmission connection with the main shaft 62 of the active side photovoltaic panel bracket, and the outer end of the output outer shaft 311 is suitable for transmission connection with the main shaft 62 of the driven side photovoltaic panel bracket; the outer end of the output inner shaft 312 is inserted into the inner end of the output outer shaft 311, and a torque limiting mechanism 4 is provided between the output inner shaft 312 and the output outer shaft 311, and the output outer shaft 311 is transmission-connected with the reduction transmission mechanism;

[0042] When the torque transmitted by the output inner shaft 312 is less than the torque setting range of the torque limiting mechanism 4, the output inner shaft 312 rotates synchronously with the output outer shaft 311 through the torque limiting mechanism 4;

[0043] When the torque transmitted by the output inner shaft 312 is greater than the torque setting range of the torque limiting mechanism 4 , the output inner shaft 312 and the output outer shaft 311 rotate relatively independently.

[0044] Specifically, as an optional implementation in this embodiment, Figure 4 As shown, the torque limiting mechanism 4 includes a steel ball 41, a spring 42, a locking bolt 43 and a plurality of ball grooves 44;

[0045] Each ball groove 44 is arranged in a ring shape on the outer wall of the output inner shaft 312. A mounting hole is opened on the output outer shaft 311. A steel ball 41, a spring 42 and a locking bolt 43 are arranged in the mounting hole from bottom to top. The locking bolt 43 is threadedly connected to the mounting hole and is pressed against the steel ball 41 through the spring 42. When the lower part of the steel ball 41 is located in the ball groove 44 of the output inner shaft 312, the output outer shaft 311 drives the output inner shaft 312 to rotate synchronously through the steel ball 41. When the steel ball 41 moves up and leaves the ball groove 44, the output inner shaft 312 rotates independently.

[0046] In this embodiment, the screwing depth of the locking bolt 43 determines the pressing force of the locking bolt 43 on the spring 42, thereby limiting the tangential force that the steel ball 41 can withstand, that is, the torque of the torque limiting mechanism 4 can be controlled by adjusting the locking bolt 43.

[0047] In this embodiment, the shape of the ball groove can also be replaced by any one of a V-shaped groove, a trapezoidal groove, and a rectangular groove.

[0048] In this embodiment, the spring 42 is in contact with the steel ball 41 via a slider 45 .

[0049] In this embodiment, the depth of the lower portion of the steel ball 41 in the ball groove 44 is less than the radius of the steel ball 41 , and the specific depth is adjusted according to the actual required torque.

[0050] Specifically, as an optional implementation in this embodiment, a pair of first sliding sleeves 23 are arranged between the output outer shaft 311 and the housing 21, and the two first sliding sleeves 23 are located on both sides of the mounting hole of the output outer shaft 311;

[0051] A pair of second sliding sleeves 24 are disposed between the output inner shaft 312 and the output outer shaft 311 . The two second sliding sleeves 24 are located on both sides of the ball groove 44 of the output inner shaft 312 .

[0052] In this embodiment, the output outer shaft 311 is stably rotated in the housing 21 by means of a pair of first sliding sleeves 23 , and the output inner shaft 312 and the output outer shaft 311 are stably rotated by means of a pair of second sliding sleeves 24 .

[0053] Specifically, as an optional implementation in this embodiment, an outer shaft mounting hole is opened on one side of the outer shell 21, and an end cover 22 is arranged on the other side of the outer shell 21. An inner shaft mounting hole is opened on the end cover 22. The output outer shaft 311 passes through the outer shaft mounting hole and forms a step opening with the outer shaft mounting hole. The output inner shaft 312 passes through the inner shaft mounting hole of the end cover 22 and forms a step opening with the inner shaft mounting hole.

[0054] In this embodiment, after the end cover 22 is locked on the housing, the output inner shaft 312, the output outer shaft 311 and the housing can be stably assembled.

[0055] Specifically, as an optional implementation in this embodiment, the reduction transmission mechanism includes a first bevel gear 32, a second bevel gear 33, a gear shaft 34, a first spur gear 35, a second spur gear 36, a worm 37 and a worm wheel 38;

[0056] The first bevel gear 32 is arranged on the input shaft 30, the second bevel gear 33 and the first spur gear 35 are respectively fixedly arranged on the gear shaft 34, the second spur gear 36 is fixedly arranged on the worm 37, the worm wheel 38 is fixedly connected to the output outer shaft 311, the worm 37 cooperates with the worm wheel 38, the two spur gears are meshed, and the two bevel gears are meshed; the input shaft 30 drives the output outer shaft 311 to rotate via the gear shaft 34, the worm 37 and the worm wheel 38 in sequence.

[0057] In this embodiment, the worm gear 38 and the output outer shaft 311 are an integral structure. Figure 2 As shown in , the arc of the worm wheel 38 is 60°, that is, the worm 37 can drive the worm wheel 38 to rotate by 60°, that is, the main shaft 62 and the photovoltaic panel are finally driven to rotate and adjust by an angle of 60°.

[0058] like Figure 5 The photovoltaic bracket shown has a main rotary reducer 5 and a secondary rotary reducer 2 of the present invention on one side. Multiple photovoltaic panels between adjacent columns are installed respectively through main shafts 62. The rotation of the main shaft 62 can drive the photovoltaic panels to rotate. A main rotary reducer 5 and multiple secondary rotary reducers 2 are configured in each row of photovoltaic brackets. Multiple main shafts 62 are spaced between the secondary rotary reducer 2 and the main rotary reducer 5 to achieve multi-point drive of the photovoltaic bracket.

[0059] The principle structure of the main rotary reducer 5 is the same, the difference is that the output shaft of the main rotary reducer 5 is an integral shaft (without inner and outer shafts), unlike the auxiliary rotary reducer 2 which is divided into inner and outer shafts. A transmission shaft is arranged in the main rotary reducer 5, and reducers are arranged at both ends of the transmission shaft. The transmission shaft of the main rotary reducer 5 and the input shaft 30 of the auxiliary rotary reducer 2 are connected by multiple synchronous shafts 61 to realize the synchronous operation of the two reducers. The main shafts 62 between the main and auxiliary rotary reducers are fixedly connected to form a long main shaft 62, one end of the long main shaft 62 is connected to the output shaft of the main rotary reducer 5, and the other end of the long main shaft 62 is fixedly connected to the output inner shaft 312 of the auxiliary rotary reducer 2 of the present invention, and the output outer shaft 311 of the auxiliary rotary reducer 2 is fixedly connected to the adjacent main shaft 62.

[0060] During normal operation, the transmission shaft of the main rotary reducer 5 drives the input shaft 30 of the auxiliary rotary reducer 2 to rotate through the synchronous shaft 61, and the input shaft 30 of the auxiliary rotary reducer 2 drives the output outer shaft 311 to rotate through the internal reduction transmission mechanism. At the same time, the output shaft of the main rotary reducer 5 will also drive the output inner shaft 312 to rotate through the long main shaft 62. When the torque of the output inner shaft 312 is less than the set torque of the torque limiting mechanism 4, the output inner shaft 312 also drives the output outer shaft 311 to rotate. That is to say, during normal operation, the output outer shaft 311 of the auxiliary rotary reducer 2 is driven by the reduction transmission mechanism on the one hand, and by the output inner shaft 312 on the other hand, and together drive the main shaft 62 connected to the output outer shaft 311 to rotate.

[0061] When the synchronous shaft 61 transmission between the main and auxiliary rotary reducers fails, the input shaft 30 of the auxiliary rotary reducer 2 is no longer driven. At the same time, the reduction mechanism in the auxiliary rotary reducer 2 also stops running, while the main rotary reducer 5 works normally and will continue to drive the output inner shaft 312 of the auxiliary rotary reducer 2 to continue rotating through the long main shaft 62. When the torque borne by the output inner shaft 312 is greater than the torque limiting mechanism 4, the output inner shaft 312 rotates independently. At this time, the output outer shaft 311 and the internal reduction mechanism will not be affected by the torque of the output inner shaft 312, thereby effectively protecting the gear mechanism in the auxiliary rotary reducer 2.

[0062] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A secondary rotary reducer for a photovoltaic support, characterized in that: include A housing, wherein a reduction transmission mechanism, an input shaft and an output shaft are arranged in the housing, and the input shaft drives the output shaft to rotate through the reduction transmission mechanism; The output shaft comprises an output inner shaft and an output outer shaft, the outer end of the output inner shaft is suitable for transmission connection with the main shaft of the active side photovoltaic panel bracket, and the outer end of the output outer shaft is suitable for transmission connection with the main shaft of the driven side photovoltaic panel bracket; the outer end of the output inner shaft is inserted into the inner end of the output outer shaft, and a torque limiting mechanism is provided between the output inner shaft and the output outer shaft, and the output outer shaft forms a transmission connection with the reduction transmission mechanism; When the torque transmitted by the output inner shaft is less than the torque setting range of the torque limiting mechanism, the output inner shaft rotates synchronously with the output outer shaft through the torque limiting mechanism; When the torque transmitted by the output inner shaft is greater than the torque setting range of the torque limiting mechanism, the output inner shaft and the output outer shaft rotate relatively independently; The torque limiting mechanism includes a steel ball, a spring, a locking bolt and a plurality of ball grooves; Each ball groove is arranged in a ring shape on the outer wall of the output inner shaft. A mounting hole is provided on the output outer shaft. A steel ball, a spring and a locking bolt are arranged in the mounting hole from bottom to top. The locking bolt is connected to the thread of the mounting hole and is pressed against the steel ball by the spring. When the lower part of the steel ball is located in the ball groove of the output inner shaft, the output outer shaft drives the output inner shaft to rotate synchronously through the steel ball. When the steel ball moves up and leaves the ball groove, the output inner shaft rotates independently. The reduction transmission mechanism comprises a first bevel gear, a second bevel gear, a gear shaft, a first spur gear, a second spur gear, a worm and a worm wheel; The first bevel gear is arranged on the input shaft, the second bevel gear and the first spur gear are respectively fixedly arranged on the gear shaft, the second spur gear is fixedly arranged on the worm, the worm wheel is fixedly connected to the output outer shaft, the worm and the worm wheel cooperate, the two spur gears are meshed, and the two bevel gears are meshed; the input shaft drives the output outer shaft to rotate in sequence through the gear shaft, the worm and the worm wheel.

2. The auxiliary rotary reducer for photovoltaic support according to claim 1 is characterized in that: A pair of first sliding sleeves are arranged between the output outer shaft and the housing, and the two first sliding sleeves are located on both sides of the mounting hole of the output outer shaft; A pair of second sliding sleeves are arranged between the output inner shaft and the output outer shaft, and the two second sliding sleeves are located on both sides of the ball groove of the output inner shaft.

3. The auxiliary rotary reducer for a photovoltaic support according to claim 2 is characterized in that: An outer shaft mounting hole is provided on one side of the outer shell, an end cover is provided on the other side of the outer shell, an inner shaft mounting hole is provided on the end cover, the output outer shaft passes through the outer shaft mounting hole and forms a step opening with the outer shaft mounting hole, and the output inner shaft passes through the inner shaft mounting hole of the end cover and forms a step opening with the inner shaft mounting hole.

4. The auxiliary rotary reducer for a photovoltaic support according to claim 1 is characterized in that: The ball groove is replaced by any one of a V-shaped groove, a trapezoidal groove and a rectangular groove.

5. The auxiliary rotary reducer for a photovoltaic support according to claim 1 is characterized in that: The worm gear and the output outer shaft are an integrated structure; The worm wheel is a fan-shaped structure, so that the worm wheel drives the output outer shaft to rotate at an angle ranging from 30 to 60 degrees.

6. The auxiliary rotary reducer for a photovoltaic support according to claim 1, characterized in that: The spring is in contact with the steel ball via a slider between the spring and the steel ball.

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