CN215378828U - Single-girder driving solar tracking mechanism - Google Patents

Abstract

The utility model discloses a single-girder driven solar tracking mechanism, which comprises a girder and at least one rotary speed reducer, wherein one rotary speed reducer is connected with a motor, the motor is controlled by a motor controller, and the motor controller is connected with the motor through a cable; a plurality of connecting pieces are distributed on the transmission shaft at intervals along the length direction and are connected with the main beam through slide rails, and the connecting pieces can slide on the slide rails. The multi-point drive tracking connecting piece has the advantages that the span between the two upright posts of the connecting piece is large through multi-point drive tracking, the deformation of the transmission shaft caused by sagging is solved, the problem of rotation oscillation caused by bending of the transmission shaft is solved, and the problem of discontinuous rotation of the transmission shaft caused by sagging deformation is solved.

Description

Single-girder driving solar tracking mechanism

Technical Field

The utility model belongs to the technical field of solar power generation, and particularly relates to a single-main-beam driving solar tracking mechanism.

Background

The solar photovoltaic power generation has the advantages of rapid rising of the proportion of the solar photovoltaic power generation in the electric power market and considerable market prospect. The tracking power generation system adopted in a large commercial power station increases the power generation capacity of the power station by more than 20% compared with a fixed power generation system, so that more commercial power stations adopting tracking power generation are provided in the future, and more requirements are provided for a single-main-beam multipoint-driven solar tracking power generation system (tracking support). The flat single-shaft or inclined single-shaft tracking power generation system which is mainstream in the current market has larger and larger installed power due to the increase of component power, and the structure of the flat single-shaft or inclined single-shaft tracking power generation system has obvious defects and can not adapt to higher and more use requirements of future trackers gradually. The conventional flat single shaft has the defects that the longer the length of a single-row bracket is, the more easily low-frequency resonance is generated, the torsion deformation is easily generated at the tail ends of the main beams of the torque tubes at the two ends of the driving point and the like because only one rigid supporting driving point is arranged, and the conventional flat single shaft has the advantages that the installed capacity is further increased and the cost per watt is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a single-main-beam driving solar tracking mechanism for overcoming the defects of the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a single-main-beam driving solar tracking mechanism for overcoming the defects of the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme: a single-girder driven solar tracking mechanism comprises a girder and at least one rotary speed reducer, wherein one rotary speed reducer is connected with a motor, the motor is controlled by a motor controller, and the motor controller is connected with the motor through a cable; the rotary speed reducer connected with the motor is a driving rotary speed reducer, other rotary speed reducers are driven rotary speed reducers, the torque of the driving rotary speed reducer is transmitted to the driven rotary speed reducer through a transmission shaft, and the driving rotary speed reducer and the driven rotary speed reducer synchronously rotate to further drive the main beam to rotate.

In a tracking power generation system, the stability of a transmission shaft is the stable basis of the whole tracking system, and in the long-term movement process of the transmission shaft, the span of the two upright post supports of the multi-point driving tracking support is large, so that the transmission shaft is deformed due to sagging. In a first aspect of the utility model, it is an object to provide a solar tracking system with stable torque transmission.

Optionally, a plurality of connecting pieces are distributed on the transmission shaft at intervals along the length direction, the connecting pieces are connected with the main beam through slide rails, and the connecting pieces can slide on the slide rails.

Optionally, the connecting member slides outside the slide rail.

Optionally, a sliding ring is arranged on the connecting piece, and the sliding ring is sleeved outside the sliding rail.

Optionally, the connecting member slides in the slide rail.

Optionally, an annular slide way is arranged outside the connecting piece, an annular groove matched with the annular slide way is arranged in the slide rail, and the annular slide way can slide in the annular groove.

Optionally, the slide rail is arranged in an arc shape, a frame body with a shape consistent with that of the main beam is arranged on the slide rail, and the main beam penetrates through the frame body.

Optionally, the rotary speed reducer is a worm gear speed reducer, a transmission gear is sleeved outside one end of the worm, a first bevel gear is arranged at the output end of the motor, the transmission gear is connected with the output end of the motor, and the transmission gear is in transmission fit with the first bevel gear through a bevel gear group.

Optionally, the bevel gear set includes a second bevel gear engaged with the first bevel gear, a transmission gear disposed on one side of the first bevel gear, and a rotating shaft for connecting the second bevel gear and the transmission gear.

Optionally, the worm wheel both ends all link to each other with the girder through coupling assembling, coupling assembling includes disc, square axle and locates the spliced pole between disc and the square axle.

Optionally, the square shaft is arranged at an eccentric position relative to the disc, a first positioning hole is formed in the disc, a second positioning hole is formed in the worm wheel, and the first positioning hole is in rotation stopping fit with the second positioning hole through a locking piece.

In the solar tracking system, the problem that a main beam cannot be installed or the length is insufficient due to the size error of the upright column caused by foundation construction is solved. In a second aspect of the utility model, the utility model aims to provide a multipoint driving tracking transmission system with a main beam with a controllable length.

Optionally, the main beam penetrates through the inside of the rotary speed reducer.

Optionally, a rotating shaft is sleeved outside the main beam and is matched with the worm wheel through a rolling bearing.

Optionally, the main beam is connected to the pivot shaft and the housing by a locking member.

Optionally, the retaining member is provided with a convex ring extending outwards in the axial direction, the outer wall of the convex ring is provided with a first inclined plane structure from top to bottom, the inner walls of the rotary shaft and the rotary speed reduction shell are provided with a second inclined plane structure from bottom to top, and the first inclined plane can move left and right along the second inclined plane.

Optionally, the locking member is provided with an outwardly extending truncated cone along the radial direction, the truncated cone is provided with a first locking hole, the rotary shaft and the housing of the rotary speed reducer are both provided with a second locking hole, and the first locking hole is in rotation-stopping fit with the second locking hole through the locking member.

Optionally, the outer wall of retaining member is the first inclined plane structure setting from top to bottom, be equipped with a plurality of inside extension's strengthening ribs on the inner wall circumference of revolving axle, be by the second inclined plane structure setting supreme down on the inner wall of this strengthening rib, first inclined plane can be followed the second inclined plane and removed the side to side.

Optionally, the locking member is provided with a boss extending outward in the radial direction, the boss is provided with a first locking hole, the rotary shaft and the housing of the rotary speed reducer are both provided with a second locking hole, and the first locking hole is in rotation-stopping fit with the second locking hole through the locking member.

Optionally, the shape of the inner wall of the locking member is the same as that of the outer wall of the main beam.

Compared with the prior art, the utility model has the following advantages: 1. the span between two upright posts of the connecting piece is large by multi-point drive tracking, so that the problem that the transmission shaft deforms due to sagging is solved, the problem that the transmission shaft rotates and vibrates due to bending of the transmission shaft is solved, and the problem that the rotation of the transmission shaft is discontinuous due to sagging deformation is solved;

2. through the arrangement of the sliding rails and the connecting pieces, the main beam drives the sliding ring of the transmission shaft to rotate; the rotation of the main beam and the rotation of the transmission shaft are not interfered with each other and can freely rotate within a limited range;

3. through eccentric arrangement, one end connected with the worm wheel is smaller in design size, so that installation interference of a connecting bolt can be avoided, and the other end is larger in design size and can be matched with a main beam with a larger size;

4. the main beam penetrates through the middle of the speed reducer, so that the length of the main beam can be longer, joints among the main beams can be effectively reduced, the rigidity and the strength of the whole row of supports are increased, and the risk is reduced;

5. the inner ring of the locking piece and the main beam are arranged in the same shape, so that the connection rigidity between the torque tube and the speed reducer is ensured;

6. through the setting on first inclined plane and second inclined plane, when the locking piece takes place to remove, the retaining member can take place to contract and change, to the radial pressure of girder to reach the effect of locking girder torque tube.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of an explosion structure of the rotary speed reducer of the present invention.

Fig. 3 is a left side view of the rotary reduction gear of the present invention.

Fig. 4 is a cross-sectional perspective view taken along a-a in fig. 3.

Fig. 5 is an enlarged view of a structure shown in fig. 3.

Fig. 6 is a schematic partial cross-sectional view of a rotary speed reducer according to the first embodiment of the present invention.

Fig. 7 is a partial sectional view of a rotary reduction gear according to a second embodiment of the present invention.

Fig. 8 is a third schematic partial sectional view of the rotary reduction gear of the present invention.

Fig. 9 is a schematic view of a connecting assembly according to the present invention.

Fig. 10 is a schematic view of the worm gear of the present invention.

Fig. 11 is a schematic structural diagram of a second embodiment of the present invention.

Fig. 12 is a partial cross-sectional view of a first embodiment of the present invention.

Fig. 13 is a schematic structural view of the present invention with the main beam disposed therein.

Fig. 14 is a schematic diagram of an explosion structure of a rotary speed reducer with a main beam arranged inside.

Fig. 15 is a first partial sectional view of a rotary speed reducer with a main beam of the present invention.

Fig. 16 is a second partial sectional view of a rotary reduction gear having a main beam according to the present invention.

Fig. 17 is an enlarged view of the structure at B in fig. 16.

Fig. 18 is a schematic view of the retaining member with the main beam disposed therein.

Fig. 19 is a schematic view of the structure of the rotating shaft with the main beam inside.

Fig. 20 is a structural schematic diagram of a second embodiment with a main beam arranged inside.

Fig. 21 is a schematic diagram of an explosive structure of the second embodiment with the main beam arranged inside.

Fig. 22 is a partial sectional view showing a first embodiment in which the main beam is arranged.

Fig. 23 is a partial sectional view of a second embodiment with a main beam disposed therein.

Fig. 24 is a schematic view showing a structure of a rotating shaft of the second embodiment in which a main beam is provided.

Fig. 25 is a structural view of a locking member of the second embodiment, which is provided inside the main beam.

Detailed Description

As shown in fig. 1, 11 and 13, in some embodiments, a single-girder driven solar tracking mechanism includes a girder 1 and at least one rotary speed reducer 10, the number of the rotary speed reducers 10 can be self-arranged according to specific situations, and can be 1 or more than 1, and the internal structures of a plurality of rotary speed reducers 10 are completely the same; one of the rotary speed reducers 10 is connected with a motor 11, the motor 11 is controlled by a motor controller, and the motor controller is connected with the motor 11 through cables; the rotary speed reducer 10 connected with the motor 11 is a driving rotary speed reducer 10, the other rotary speed reducers 10 are driven rotary speed reducers 10, the torque of the driving rotary speed reducer 10 is transmitted to the driven rotary speed reducer 10 through a transmission shaft 12, and the transmission shaft 12 rotates around the main beam 1 in the circumferential direction while transmitting automatically. Thereby driving the main beam 1 to rotate.

As shown in fig. 1-2, in some embodiments, a plurality of connecting members 13 are distributed on the transmission shaft 12 at intervals along the length direction, the connecting members 13 are rotatably engaged with the transmission shaft 12 through self-lubricating bearings, which are the prior art and are not described herein again, the connecting members 13 are connected with the main beam 1 through sliding rails, and the connecting members 13 can perform sliding motion on the sliding rails. Through the arrangement of the sliding rails and the connecting pieces, the main beam drives the sliding ring of the transmission shaft to rotate; the rotation of the main beam and the rotation of the transmission shaft do not interfere with each other, and the main beam and the transmission shaft can freely rotate within a limited range.

As shown in fig. 11-12, in some embodiments, the connector 13 slides out of the slide rail 131.

As shown in fig. 11 to 12, in some embodiments, the connecting element 13 is provided with a sliding ring 15, the sliding ring 15 is sleeved outside the sliding rail 131, and the sliding ring 15 moves along the track of the sliding rail 131.

As shown in fig. 2 and 8, preferably, in some embodiments, the connecting member 13 slides within the slide rail 131.

As shown in fig. 2 and 8, preferably, in some embodiments, the connecting member 13 is externally provided with an annular slide 141, the slide rail 131 is internally provided with an annular groove 17 matched with the annular slide, and the annular slide 141 can slide in the annular groove 17.

As shown in fig. 8 and 12, in some embodiments, the slide rail 131 is disposed in an arc shape, the slide rail 131 is provided with a frame 132 corresponding to the shape of the main beam 1, the main beam 1 is inserted into the frame 132, and in particular, the frame 132 is provided with a pair of outwardly extending support portions, which can be fixed by bolts and nuts.

As shown in fig. 4-7, in some embodiments, a transmission gear 19 is sleeved outside one end of the worm 18, a first bevel gear 100 is provided at an output end of the motor 11, specifically, a second rotating shaft 101 is provided in the first bevel gear 100, the transmission shaft 12 is connected to the output end of the motor 11, a universal joint sleeve 102 is provided at a joint of the second rotating shaft 101 and the transmission shaft 12, and the second rotating shaft 101 is connected to a housing of the slewing reducer 10 through a bearing 103; the drive gear 19 is coupled to the first bevel gear 100 via a set of bevel gears 104.

As shown in fig. 4-7, in some embodiments, the bevel gear set 104 includes a second bevel gear 105 engaged with the first bevel gear 100, a transmission gear 106 disposed on one side of the first bevel gear 100, and a first rotating shaft 107 for connecting the second bevel gear 105 and the transmission gear 106, and specifically, a bearing is sleeved outside the first rotating shaft 107, and a fixed seat 108 is connected outside the bearing, and the fixed seat 108 is fixedly connected to an inside of a housing of the rotary speed reducer 10.

As shown in fig. 2 and 9-10, in some embodiments, the worm wheel 109 is connected to the girder 1 at both ends thereof by a connection assembly, which includes a circular disc 110, a square shaft 111, and a connection column 1120 disposed between the circular disc 110 and the square shaft 111; specifically, the disc, the square shaft and the connecting column are integrally processed, four corners of the square shaft are arranged in a circular arc shape, and the shape of the outer circle of the square shaft is the same as that of the inner wall of the main beam.

As shown in fig. 9-10, in some embodiments, the square shaft 111 is disposed at an eccentric position with respect to the disc 110, and by the eccentric arrangement, one end connected to the worm wheel is designed to be smaller in size so as to avoid installation interference of the connecting bolt, and the other end is designed to be larger in size so as to match with a larger-sized main beam, and meanwhile, the eccentric design can reduce the moment arm of the support assembly, which means that the driving moment of the entire column of supports is reduced, and the driving energy consumption of the entire column of supports is effectively reduced; the disc 110 is provided with a first positioning hole 112, the worm wheel 109 is provided with a second positioning hole 113, the first positioning hole 112 is in rotation stopping fit with the second positioning hole 113 through a locking piece 114, and specifically, the locking piece 114 can be provided by a bolt and a nut;

as shown in fig. 9 to 10, in some embodiments, the square shaft 110 is provided with a first locking hole 112, and the worm wheel 109 is provided with a second locking hole 113, and a locking member 114 for fixing the positions of the first locking hole 112 and the second locking hole 113 relatively is provided, and in particular, the locking member 114 may be a bolt and nut arrangement.

As shown in fig. 7, in some embodiments, a first limiting portion 116 is disposed on the housing of the rotary speed reducer 10, and a second limiting portion 117, which is matched with the first limiting portion 116, is disposed on the circumference of the worm wheel 109. Through the arrangement of the first limiting part 116 and the second limiting part 117, the stability of the rotary speed reducer 10 during rotation is ensured to be higher, and secondly, the high safety protection capability is ensured to be still provided under the condition that the external travel switch fails.

As shown in fig. 7, in some embodiments, the first limiting portion 116 is at least two convex corners fixed to the top inside the casing of the rotary speed reducer 10, and the second limiting portion 117 is a convex ring fixed to the circumferential direction of the worm wheel 109.

As shown in fig. 13, in some embodiments, the main beam 1 is inserted into the rotary speed reducer 10. Through setting up inside, can effectively reduce and connect between the girder 1, increase the rigidity and the intensity of permutation support, reduce the risk.

As shown in fig. 2 and 22, in some embodiments, the main beam 1 is externally sleeved with a rotating shaft 2, the rotating shaft 2 is engaged with the worm wheel 109 through a rolling bearing 20, specifically, the rolling bearing 20 is a four-point contact ball bearing, which is a separate type bearing in the prior art, and may also be an angular contact ball bearing in which a set of bearings can bear bidirectional axial loads, and details thereof are not repeated.

In some embodiments, the main beam 1 is connected to the revolving shaft 2 and the housing 10 of the reduction gear unit by means of locking elements 21, as shown in figures 14-15 and 21-23.

As shown in fig. 15 and 18-19, in some embodiments, the locking member 21 is provided with a protruding ring 210 extending outward along the axial direction, specifically, the inner wall of the protruding ring 210 matches with the outer wall of the main beam 1, and the outer wall of the protruding ring 210 is arranged in a circular arc shape, and in this embodiment, the number of the locking members 21 is 4, and the locking members are uniformly distributed in the circumferential direction of the main beam 1 at intervals; the outer wall of the convex ring 210 is a first inclined plane 211 structure from top to bottom, the inner walls of the shells of the revolving shaft 2 and the revolving speed reducer 1 are a second inclined plane 212 structure from bottom to top, and the first inclined plane 211 can move left and right along the second inclined plane 212.

As shown in fig. 15 and 18-19, in some embodiments, the locking member 21 is provided with an outwardly extending truncated cone 22 in the radial direction, the truncated cone 22 is provided with a first locking hole 23, the housing of the rotary shaft 2 and the rotary speed reducer 1 are provided with a second locking hole 24, the first locking hole 23 is in locked engagement with the second locking hole 24 through a locking member 25, and the locking member 25 can be provided by a bolt and a nut. When the locking member 21 is axially locked by the locking member 25 to move, the radial distance between the four locking members 21 is contracted to change, and the locking force of the screw is changed through the first inclined surface 26 and the second inclined surface 27 to change the radial pressure of the locking member 21 on the main beam 1, so that the effect of locking the torque tube of the main beam 1 is achieved.

As shown in fig. 20 to 25, preferably, in some embodiments, the outer wall of the locking member 21 is configured as a first inclined surface 211a from top to bottom, the locking members 21 are arranged in 4 pairs, and are uniformly distributed on the left side and the right side of the main beam 1 at intervals in pairs, specifically, the inner wall of the locking member 21 is arranged in a plane, and one surface of the locking member contacting with the main beam 1 is a plane; the inner wall of the rotating shaft 2 is circumferentially provided with a plurality of reinforcing ribs 220 extending inwards, the number of the reinforcing ribs is 8-12, the inner wall of each reinforcing rib 220 is structurally provided with a second inclined surface 212a from bottom to top, and the first inclined surface 211a can move left and right along the second inclined surface 212 a.

As shown in fig. 20 to 25, preferably, in some embodiments, the locking member 21 is provided with a boss 221 extending outward in the radial direction, the boss 211 is provided with a first locking hole 23a, the housing of the rotary shaft 2 and the rotary speed reducer 1 are provided with a second locking hole 24a, and the first locking hole 23a is in rotation stop fit with the second locking hole 24a through a locking member 25 a; after the girder passed the hole, twist locking piece 25a pulling retaining member 21 and produce axial motion, the retaining member 2 made the radial position who changes self through sliding engagement with the second inclined plane of strengthening rib, when retaining member 2 moved suitable position, the interval between two sets of locking retaining members 2 of symmetry diminishes, every locking retaining member 2 plane all with the laminating of torque pipe girder outer plane to this reaches the mesh of locking girder torque pipe.

As shown in fig. 18 and 25, in some embodiments, the inner wall shape of retaining member 21 is the same configuration as the outer wall shape of main beam 1.

As shown in fig. 16-17, in some embodiments, the rotary speed reducer 10 and the transmission shaft 12 are arranged to rotate synchronously and in the same direction with the main beam 1, the transmission shaft 12 synchronously rotates along with the main beam 1 in the same direction in the rotating process of the main beam 1 and the rotary speed reducer 10, so that the main beam 1 cannot touch the transmission shaft 12 to be clamped and cannot rotate in the rotating process, secondly, when the main beam 1 and the transmission shaft 12 rotate together, the connected lines are driven to rotate together, therefore, the circuit does not need to be arranged very long, the simplification of the circuit is ensured, the knotting and winding of the circuit can not happen in the rotating process, and finally, because the transmission shaft 12 and the main beam 1 are synchronously and equidirectionally arranged, the bearing capacity of the transmission shaft 12 is ensured to be improved, and the service life of the transmission shaft 12 is prolonged.

As shown in fig. 16-17, in some embodiments, the rotary speed reducer 10 is a worm gear 109 rotary speed reducer 10, the worm gear 109 of the rotary speed reducer 10 is fixedly disposed on the column, the housing of the rotary speed reducer 10 is fixedly connected to the main beam 1, and the worm gear 109 and the housing are in rotational fit; when the motor 11 is started, the worm 18 revolves around the worm wheel 109 while rotating, so as to drive the rotary speed reducer 10 and the main beam 1 to rotate, the worm wheel 109 of the rotary speed reducer 10 is fixedly arranged on the upright column, the shell of the rotary speed reducer 10 is fixedly connected with the main beam 1, and the worm wheel 109 is in rotating fit with the shell; when the motor 11 is started, the worm 18 revolves around the worm wheel 109 while rotating, so as to drive the rotary speed reducer 10 and the main beam 1 to rotate.

As shown in fig. 16-17, in some embodiments, a third bevel gear 200 and an output gear 201 are externally sleeved on one end of the worm 18, a first gear 202 is arranged at the input end of the motor 11, and a second bevel gear 204 is externally sleeved on the transmission shaft 12. When the motor 11 is started, the motor 11 drives the first gear 202 to rotate, the first gear 202 is engaged with the third bevel gear 200, the third bevel gear 200 rotates and is engaged with the second bevel gear 204, and the second bevel gear 204 rotates to drive the transmission shaft 12 to rotate.

While there have been shown and described what are at present considered the fundamental principles and essential features of the utility model and its advantages, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. A single-girder driven solar tracking mechanism comprises a girder and at least one rotary speed reducer, wherein one rotary speed reducer is connected with a motor, the motor is controlled by a motor controller, and the motor controller is connected with the motor through a cable; the method is characterized in that: the rotary speed reducer connected with the motor is a driving rotary speed reducer, other rotary speed reducers are driven rotary speed reducers, the torque of the driving rotary speed reducer is transmitted to the driven rotary speed reducer through a transmission shaft, and the driving rotary speed reducer and the driven rotary speed reducer synchronously rotate to further drive the main beam to rotate; a plurality of connecting pieces are distributed on the transmission shaft at intervals along the length direction and are connected with the main beam through slide rails, and the connecting pieces can slide on the slide rails.

2. A single-girder driving solar tracking mechanism comprises a girder and at least one rotary speed reducer, wherein one rotary speed reducer is connected with a motor, and the torque of the driving rotary speed reducer is transmitted to a driven rotary speed reducer through a transmission shaft; the method is characterized in that: a plurality of connecting pieces are distributed on the transmission shaft at intervals along the length direction and are connected with the main beam through slide rails, and the connecting pieces can slide on the slide rails.

3. The single main beam driven solar tracking mechanism of claim 2, wherein: the connecting piece slides outside the slide rail.

4. The single main beam driven solar tracking mechanism of claim 3, wherein: the connecting piece is provided with a sliding ring which is sleeved outside the sliding rail.

5. The single main beam driven solar tracking mechanism of claim 2, wherein: the connecting piece slides in the slide rail.

6. The single main beam driven solar tracking mechanism of claim 5, wherein: an annular slide way is arranged outside the connecting piece, an annular groove matched with the annular slide way is arranged in the slide rail, and the annular slide way can slide in the annular groove.

7. The single main beam driven solar tracking mechanism of claim 2, wherein: the sliding rail is arranged in an arc shape, a frame body which is consistent with the shape of the main beam is arranged on the sliding rail, and the main beam penetrates through the frame body.

8. The single-main-beam driving solar tracking mechanism as claimed in claim 2, wherein the rotary speed reducer is a worm gear speed reducer, a transmission gear is sleeved outside one end of the worm, a first bevel gear is arranged at the output end of the motor, the transmission gear is connected with the output end of the motor, and the transmission gear is in transmission fit with the first bevel gear through a bevel gear group.

9. The single main beam driven solar tracking mechanism of claim 8, wherein: the bevel gear group comprises a second bevel gear meshed with the first bevel gear, a transmission gear arranged on one side of the first bevel gear, and a rotating shaft used for connecting the second bevel gear and the transmission gear.

10. The single main beam driven solar tracking mechanism of claim 2, wherein: the worm wheel both ends all link to each other with the girder through coupling assembling, coupling assembling includes disc, square axle and locates the spliced pole between disc and the square axle.

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