Search

CN-122014823-A - Double-crank crankshaft double-fluted disc rope transmission mechanism for solar tracker

CN122014823ACN 122014823 ACN122014823 ACN 122014823ACN-122014823-A

Abstract

The invention discloses a double-crank crankshaft double-fluted disc rope transmission mechanism for a solar tracker, and belongs to the technical field of solar photovoltaic brackets. Consists of a double crank crankshaft, a double fluted disc traction wheel, a transmission rope, a semicircular swinging beam which is pulled by the transmission rope, an upright post used for installing the mechanism and the like. When the device is simultaneously engaged, passive self-locking can be realized, and the external force torsion moment of the photovoltaic array can be directly digested by each upright post. The device synthesizes the transmission ratio, and a single motor can drive a plurality of stand assemblies to operate, so that the photovoltaic array can be designed longer, the construction cost and the later cleaning cost of equipment are effectively reduced, the external force applied to the photovoltaic array in severe weather such as strong wind can be evenly distributed by the stand columns, the safety and the stability of the bracket are improved, the overall structure is simple, the cost performance is high, and the technical problems of too few transmission points and poor stability of the photovoltaic array of the traditional flat single-shaft photovoltaic bracket are effectively solved.

Inventors

  • YONG RONG

Assignees

  • 雍蓉

Dates

Publication Date
20260512
Application Date
20260409

Claims (10)

  1. 1. The double-crank crankshaft double-fluted disc rope transmission mechanism for the solar tracker is characterized by comprising a double-crank crankshaft (101), a double-fluted disc traction wheel (102), a transmission rope (103), a semicircular swinging beam (104) and an upright post (105) for installing all parts; The double-crank crankshaft (101), the double-fluted disc traction wheel (102) and the semicircular swing beam (104) are fixedly or rotatably arranged on the upright post (105), the double-fluted disc traction wheel (102) pulls and pulls two ends of the semicircular swing beam (104) through a pair of transmission ropes (103), and the whole formed by the double-crank crankshaft (101), the double-fluted disc traction wheel (102), the semicircular swing beam (104) and the upright post (105) is an upright post assembly; The upright post assemblies are arranged in rows along the north-south direction when the upright post assemblies are applied to the flat single-shaft tracking bracket, the rotation axes of the double-crank crankshafts (101) face to the north-south direction, the extension directions of the semicircular swinging beams (104) face to the east-west direction in the horizontal state, and the double-crank crankshafts (101) are directly driven by a transmission mechanism (107) to do reciprocating rotation through a motor (106), or are connected with the double-crank crankshafts (101) of another upright post assembly through a transmission shaft (201) to achieve the same-speed and same-angle reciprocating rotation; The double-fluted disc traction wheel (102) is sleeved on a shaft body below the double-crank crankshaft (101), the double-crank crankshaft (101) comprises two cranks (301), the two cranks (301) are alternately meshed with adjacent tooth grooves of two fluted discs (401) of the double-fluted disc traction wheel (102), one ends of a pair of transmission ropes (103) are fixed on the double-fluted disc traction wheel (102), and when the transmission ropes do reciprocating rotation, the pair of transmission ropes (103) are in a retracted and released state, and the lengths of the retraction ropes are the same and the directions are opposite; The other end of the transmission rope (103) is fixed with two ends of the semicircular swinging beam (104), the retraction motion of the transmission rope (103) drives the semicircular swinging beam (104) to do reciprocating rotation by taking a self bearing as a rotation center, and a support structure (202) for installing a photovoltaic array is arranged on the semicircular swinging beam (104) in an erected mode, and the sun tracking motion of the flat single-axis photovoltaic array is realized along with the reciprocating rotation of the semicircular swinging beam (104).
  2. 2. A double crank crankshaft double tooth disc rope transmission mechanism for a solar tracker according to claim 1, characterized in that the offset distances (303) of the two cranks (301) are the same, the opposite directions and the included angles are 180 degrees, the north-south spacing (302) of the two cranks is the same as the tooth disc spacing (404) of the two tooth discs (401) of the double tooth disc traction wheel (102), the center distance (304) of the two cranks is the same as the pitch (403) of the adjacent tooth discs (401) of the double tooth disc traction wheel (102) on a dividing circle, the center distance (304) of the two cranks is the vertical distance of the center lines of the two cranks (301), and the pitch (403) of the tooth grooves on the dividing circle is the vertical distance of a straight line perpendicular to the tooth disc (401) through the intersection point of the adjacent tooth groove center lines of the two tooth discs and the dividing circle of the tooth disc (401).
  3. 3. A double-crank crankshaft double-fluted disc rope transmission mechanism for a solar tracker according to claim 2, wherein the double-fluted disc traction wheel (102) is of an integrated structure, the double-fluted disc traction wheel (102) comprises two fluted discs (401) with the same specification and size and a cylindrical rope winding wheel (402), the two fluted discs (401) are respectively fixed at two ends of the rope winding wheel (402), and the fluted disc spacing (404) of the two fluted discs (401) is the same as the north-south spacing (302) of two cranks of the double-crank crankshaft (101); The tooth numbers and tooth groove specifications of the two tooth discs (401) are completely consistent, the tooth grooves are combined into a whole to deflect the pitch (403) of the adjacent tooth grooves on the dividing circle at a corresponding angle, the pitch (403) of the tooth grooves of the double tooth disc (401) on the dividing circle is 360 degrees divided by the tooth number of the tooth disc (401) and divided by 2, and the center line of any tooth groove of any tooth disc (401) is aligned with the center line of the tooth of the other tooth disc (401).
  4. 4. A double crank crankshaft double fluted disc rope transmission mechanism for a solar tracker according to claim 3, wherein one end of the pair of transmission ropes (103) is fixed on a rope winding wheel (402) of the double fluted disc traction wheel (102) and is wound for a plurality of circles, and after the other end is led out upwards in a crossed manner, the transmission ropes (103) are symmetrically tensioned upwards along a semicircular part of the semicircular swinging beam (104) and are fixedly connected to the semicircular swinging beam (104), and the winding mode (601) of the transmission ropes (103) is crossed winding.
  5. 5. The double crank crankshaft double fluted disc rope transmission mechanism for the solar tracker according to claim 4, wherein the semicircular swinging beam (104) is of an integrated structure and comprises a cross beam, a bearing sleeve and a semicircular fluted member, wherein the bearing sleeve is arranged in the middle of the cross beam and is a bearing for supporting the semicircular swinging beam (104) to rotate; The semicircular grooved component is connected with the cross beam, the transmission rope (103) can be tensioned, and the bracket structure (202) for installing the photovoltaic array is fixedly connected to the integrated structure of the semicircular swing beam (104).
  6. 6. The double-crank crankshaft double-fluted disc rope transmission mechanism for the solar tracker according to claim 5, wherein at least three shafts or shaft sleeves are sequentially arranged on the upright post (105) from top to bottom in the vertical direction, the uppermost shaft or shaft sleeve is used for positioning the rotation center of the semicircular swinging beam (104), the middle shaft or shaft sleeve is used for positioning the rotation center of the double-crank crankshaft (101), the lowermost shaft or shaft sleeve is used for positioning the rotation center of the double-fluted disc traction wheel (102), and the three rotation center lines are in north-south orientation and are parallel to each other.
  7. 7. A double crank crankshaft double fluted disc rope transmission for a solar tracker according to claim 6, characterized in that the two cranks (301) of the double crank crankshaft (101) are in one-to-one correspondence with the two fluted discs (401) of the double fluted disc traction wheel (102) and are in a mating state of alternate or simultaneous engagement, each rotation of the double crank crankshaft (101) drives each fluted disc (401) of the double fluted disc traction wheel (102) to rotate one tooth, the double crank crankshaft (101) and the double fluted disc traction wheel (102) are transmitted and locked into a transmission state (501) and a locking state (502); When the double-crank crankshaft (101) rotates, and when two cranks (301) are simultaneously embedded into tooth grooves of the double-tooth disc traction wheel (102), the double-tooth disc traction wheel (102) keeps static, the rotating force of the photovoltaic array is limited to realize self-locking, and the double-crank crankshaft (101) rotates to a locking state (502), when one crank (301) is separated from the tooth groove and the other crank (301) goes deep into the tooth groove, the double-tooth disc traction wheel (102) is driven to rotate and realize the sun tracking action of the photovoltaic array, and the double-tooth disc traction wheel (501) is in a transmission state, and the actions that one crank (301) is separated from the tooth groove and the other crank (301) goes deep into the tooth groove are simultaneously carried out, so that the double-tooth disc traction wheel is alternately meshed; The torsion action of the photovoltaic array under the external force can be reversely transmitted to the double-crank crankshaft (101) in the transmission state (501), and the two cranks (301) are horizontally and simultaneously meshed in the locking state (502), so that no matter how much external force passes through the double-crank crankshaft (101), the double-crank crankshaft (101) cannot be continuously reversely pushed to rotate, the state is a final dead point state of the photovoltaic array under the pushing of the external force, and the passive self-locking of the photovoltaic array can be realized.
  8. 8. The double-crank crankshaft double-fluted disc rope transmission mechanism for the solar tracker according to claim 7, wherein the matching part of the double-crank crankshaft (101) and the shaft sleeve of the upright post (105) and the shaft head at the other end are outwards extended for a plurality of lengths, the shaft head is used for being connected with the shaft head of the double-crank crankshaft (101) of another upright post assembly through a transmission shaft (201), the shaft axes of the two shaft heads of the same double-crank crankshaft (101) are collinear, and the center lines of the two crank shafts are offset from the shaft axes of the shaft heads by the same distance in opposite directions.
  9. 9. The double-crank crankshaft double-fluted disc rope transmission mechanism for the solar tracker according to claim 8, wherein the tooth groove width of the fluted disc (401) is equal to the diameter of the cylindrical part of the double-crank crankshaft (101) and a proper clearance is added, the center distance (304) of two cranks of the double-crank crankshaft (101) is the same as the pitch (403) of adjacent tooth grooves of two fluted discs (401) of the double-fluted disc traction wheel (102) on a dividing circle, and the tooth groove center line of any one fluted disc (401) of the two fluted discs (401) is aligned with the tooth center line of the other fluted disc (401).
  10. 10. The double-crank crankshaft double-fluted disc rope transmission mechanism for the solar tracker according to the claims 1-9 is characterized by comprising a plurality of upright post assemblies, a transmission shaft (201) and a driving motor (106), wherein the upright post assemblies are arranged in a row along the north-south direction, the transmission shaft (201) connects the double-crank crankshafts (101) of all the upright post assemblies into a whole, the driving motor (106) is in transmission connection with the double-crank crankshaft (101) of one of the upright post assemblies, can drive all the double-crank crankshafts (101) to synchronously rotate, and drives a photovoltaic array connected with a bracket structure (202) for installing the photovoltaic array to synchronously perform sun tracking rotation through the transmission mechanism of all the upright post assemblies; The transmission ratio of a transmission shaft (201) of a support structure (202) for installing the photovoltaic array to a semicircular swinging beam (104) is the product of the number of teeth of a fluted disc (401) of a double fluted disc traction wheel (102) and the ratio of the semicircular diameter of the semicircular swinging beam (104) to the diameter of a rope winding wheel (402) of the double fluted disc traction wheel (102), and the transmission ratio is not less than 1:100; The torsion moment generated by the external force of the photovoltaic array is directly born by each upright post (105) through the passive self-locking function of the locking state (502), is digested locally, cannot be reversely transmitted to the driving motor (106), is clamped by the double-crank crankshaft (101), and is transmitted to the upright posts (105), so that the photovoltaic array is digested locally by the external force, and the stability of the whole solar photovoltaic tracking bracket system is improved.

Description

Double-crank crankshaft double-fluted disc rope transmission mechanism for solar tracker Technical Field The invention relates to the technical field of solar photovoltaic brackets, in particular to a double-crank crankshaft double-fluted disc rope transmission mechanism for a solar tracker. Background The flat single-shaft photovoltaic tracking bracket can automatically rotate along with the movement of the sun, so that the minimum incident angle is kept between the sunlight and the photovoltaic array, and the flat single-shaft photovoltaic tracking bracket only has one rotating shaft parallel to the ground, so that the projection straight line of the sunlight on the photovoltaic array can always keep the north-south direction although the sunlight cannot be completely perpendicular to the photovoltaic array. Compared with the fixed support, the photovoltaic panel can receive stronger solar rays most of the time, and the generated energy is higher. The traditional flat single-shaft photovoltaic support is realized by erecting main beams on the tops of a plurality of upright posts arranged in the north-south direction through bearings and transmission mechanisms, the photovoltaic array is installed on the main beams, the cost of the transmission mechanisms is limited, one set of transmission mechanism is difficult to install between each upright post and the main beams, part of upright posts only adopt bearings to support the main beams, the main beams can freely rotate on the upright posts without the transmission mechanisms, the problem that the traditional tracking support has too few transmission points is caused, the smaller the number of the transmission points is, the larger the distance between the transmission points is, the smaller the rigidity of the main beams in the torsion direction is, the free length of the photovoltaic array is increased, and the overall stability is poor. Therefore, a double crank crankshaft double fluted disc rope transmission mechanism suitable for a flat single shaft photovoltaic tracking bracket and capable of being arranged on each upright post is needed, so that the technical problems of too few transmission points, insufficient torsional rigidity of a photovoltaic array and poor stability of the traditional flat single shaft photovoltaic bracket are solved. Disclosure of Invention The invention aims to provide a double-crank crankshaft double-fluted disc rope transmission mechanism which has a simple structure, is driven by transmission shafts connected together simultaneously, has a large transmission ratio, saves cost and has strong practicability. The specific technical scheme of the invention is as follows: A double-crank crankshaft double-fluted disc rope transmission mechanism for a solar tracker comprises a double-crank crankshaft, a double-fluted disc traction wheel, a transmission rope, a semicircular swinging beam and upright posts for installing all components; The double-crank crankshaft, the double-fluted disc traction wheel and the semicircular swinging beam are fixedly or rotatably arranged on the upright post, the double-fluted disc traction wheel pulls and pulls two ends of the semicircular swinging beam through a pair of transmission ropes, and the whole formed by the double-crank crankshaft, the double-fluted disc traction wheel, the semicircular swinging beam and the upright post is an upright post assembly; The upright post assemblies are arranged in rows along the north-south direction when being applied to the flat single-shaft tracking bracket, the rotation axes of the double-crank crankshafts face to the north-south direction, and the extending direction of the semicircular swinging beams faces to the east-west direction in the horizontal state; The double-fluted disc traction wheel is sleeved on a shaft body below the double-crank crankshaft, the double-crank crankshaft comprises two crank throws, the two crank throws are alternately meshed with tooth grooves of the double-fluted disc traction wheel, one end of a pair of transmission ropes is fixed on the double-fluted disc traction wheel, and when the transmission ropes do reciprocating rotation, the pair of transmission ropes are in a retracted and released state, and the lengths of the retraction ropes are the same and the directions are opposite; the other end of the transmission rope is fixed with two ends of the semicircular swinging beam, the transmission rope retraction motion drives the semicircular swinging beam to do reciprocating rotation by taking a self bearing as a rotation center, and a bracket structure frame for installing the photovoltaic array is arranged on the semicircular swinging beam and rotates along with the semicircular swinging beam in a reciprocating manner to realize the sun tracking motion of the flat single-axis photovoltaic array. Preferably, the distances of the centers of the two cranks are the same, the directions of the centers of the two cranks are opp