Solar photovoltaic tracking reducer

Abstract

The present invention discloses a reducer for solar photovoltaic tracking, which has the advantage that the sum of the angle between the outer end face of the first limiting protrusion and the outer end face of the second limiting protrusion and the arc angle of the limiting block is less than or equal to 170°, that is, the angle of the gear rotating from the hard limit of the first limiting protrusion and the limiting block to the hard limit of the second limiting protrusion and the limiting block is greater than or equal to 190°, so that the hard limit angle is above ±95°, and the difference between the arc angle of the gear ring and the arc angle of the worm is greater than or equal to 180°, that is, the tracking angle of the rotary reducer reaches ±90°, and the photovoltaic panel can be rotated to be perpendicular to the ground. When it is perpendicular to the ground, the snow on the photovoltaic panel surface can be cleared to the maximum extent, and it is also convenient to clean the photovoltaic panel. At the same time, in some agricultural photovoltaic projects, the photovoltaic panel rotates perpendicular to the ground, which can maximize the use of land and facilitate agricultural machinery farming.

Description

Technical Field

[0001] The invention relates to the technical field of solar photovoltaic equipment, in particular to a reducer for solar photovoltaic tracking. Background Art

[0002] Most tracking brackets in the solar photovoltaic industry are driven by a dedicated vertical slewing reducer. Photovoltaic panels are installed on the output of the slewing reducer and the rotation of the slewing reducer is used to adjust the angle of the photovoltaic panel toward the sun to obtain better photoelectric conversion efficiency.

[0003] The current slewing reducer mainly includes a housing, a gear, a worm and an end cover. The gear and the worm are installed in the cavity of the housing. The hard limit of the slewing reducer adopts a single limit stop structure. The limit position is set at the axial position of the gear tooth. The housing limit stopper interferes with the gear limit stopper. The gear limit stopper is to cut the gear ring of the whole tooth in half and use the end face positions of the two ends of the gear ring as limit stops. Under normal use conditions, the tracking angle of the slewing reducer is ±60°, and the hard limit angle is about ±65°, which cannot make the photovoltaic panel rotate vertically to the ground. This limits the layout scope of the photovoltaic industry. As a solar power generation equipment that needs to work outdoors for a long time, photovoltaic modules may face various harsh environmental tests and various extreme weather impacts during the service life of up to 25 years. Many areas will have a high frequency of hail weather under the influence of strong convective weather. If the size of the hail is too large and too violent, the huge impact force of the hail will damage the photovoltaic modules, bringing great safety hazards. Once damage occurs, the performance of the photovoltaic power generation system will be affected. If the slewing reducer can rotate the photovoltaic panel to be perpendicular to the ground in time, the hail will not damage the surface of the photovoltaic panel. To this end, it is necessary to change the position of the hard limit of the slewing reducer so that the hard limit angle is around ±95°, and increase the tracking angle of the slewing reducer to ±90°. Summary of the invention

[0004] The technical problem to be solved by the present application is to overcome the defects of the above-mentioned related technologies and provide a reducer for solar photovoltaic tracking, whose hard limit angle is above ±95° and the tracking angle reaches above ±90°, and the photovoltaic panel can be rotated to be perpendicular to the ground.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a reducer for solar photovoltaic tracking, including a shell, an end cover, a gear and a worm, a limit block is provided on the top of the shell, and a hard limit structure is provided between the limit block and the gear; at least one side of the gear ring is provided with a symmetrical first limit protrusion and a second limit protrusion, and the limit block and the first limit protrusion and the second limit protrusion constitute the hard limit structure; the sum of the angle between the outer end face of the first limit protrusion and the outer end face of the second limit protrusion and the arc angle of the limit block is less than or equal to 170°; the difference between the arc angle of the gear ring and the arc angle of the worm is greater than or equal to 180°.

[0006] Compared with the related art, the reducer for solar photovoltaic tracking of the present application has the following advantages: the sum of the angle between the outer end face of the first limit protrusion and the outer end face of the second limit protrusion and the arc angle of the limit block is less than or equal to 170°, that is, the angle of the gear rotating from the hard limit of the first limit protrusion and the limit block to the hard limit of the second limit protrusion and the limit block is greater than or equal to 190°, so that the hard limit angle is above ±95°, and the difference between the arc angle of the gear ring and the arc angle of the worm is greater than or equal to 180°, that is, the tracking angle of the rotary reducer reaches ±90°, and the photovoltaic panel can be rotated to be perpendicular to the ground. When perpendicular to the ground, the snow on the photovoltaic panel surface can be cleared to the maximum extent, and it is also convenient to clean the photovoltaic panel. At the same time, in some agricultural photovoltaic projects, the photovoltaic panel rotates perpendicular to the ground, which can maximize the use of land and facilitate agricultural machinery farming.

[0007] Preferably, the other side of the gear ring is also provided with a symmetrical first limit protrusion and a second limit protrusion, and the top of the housing is provided with another limit stopper; the other limit stopper and the first limit protrusion and the second limit protrusion on the other side constitute another set of hard limit structures. The formation of a double hard limit structure can effectively reduce limit failure; and can effectively ensure the overlap of the meshing part of the worm and the gear, and will not affect the transmission strength of the worm and the gear.

[0008] As an improvement, the angle between the two end faces of the limit stopper is 30° to 50°, so that the limit stopper has sufficient strength to serve as a support for the hard limit of the photovoltaic panel assembly.

[0009] As an improvement, when the outer end face of the first limiting protrusion abuts against one end of the limiting block, the second end of the gear ring near the second limiting protrusion meshes with the worm; when the outer end face of the second limiting protrusion abuts against the other end of the limiting block, the first end of the gear ring near the first limiting protrusion meshes with the worm. During the rotation and revolving process of the gear, the gear ring and the worm are always meshed stably, and the two will not be disengaged.

[0010] As the best option, the angle between the first end face of the gear ring and the outer end face of the first limiting protrusion is 65°; the angle between the second end face of the gear ring and the outer end face of the second limiting protrusion is also 65°. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional schematic diagram of the solar photovoltaic tracking reducer of the present application (without photovoltaic panels).

[0012] Figure 2 It is a cross-sectional schematic diagram of a hard limit state of a solar photovoltaic tracking reducer in Example 1 of the present application.

[0013] Figure 3 yes Figure 2 AA cross-sectional view of .

[0014] Figure 4 yes Figure 2 BB cross-sectional view.

[0015] Figure 5 It is a cross-sectional schematic diagram of another hard limit state of a solar photovoltaic tracking reducer in Example 1 of the present application.

[0016] Figure 6 yes Figure 5 Schematic diagram of CC cross-section.

[0017] Figure 7 yes Figure 5 DD cross-sectional diagram.

[0018] Figure 8 It is a three-dimensional schematic diagram of the shell of a solar photovoltaic tracking reducer according to Example 1 of the present application.

[0019] Fig. 9 It is a three-dimensional schematic diagram of the gears of a solar photovoltaic tracking reducer according to Example 1 of the present application.

[0020] Fig.10 It is a cross-sectional schematic diagram of a solar photovoltaic tracking reducer according to Example 2 of the present application.

[0021] Fig.11 It is a schematic EE cross-sectional view of a hard limit state of a solar photovoltaic tracking reducer in Example 2 of the present application.

[0022] Fig.12 It is a schematic FF cross-sectional view of another hard limit state of a solar photovoltaic tracking reducer in Example 2 of the present application.

[0023] Fig.13 It is a three-dimensional schematic diagram of the shell of a solar photovoltaic tracking reducer according to Example 2 of the present application.

[0024] Fig.14 It is a three-dimensional schematic diagram of the gears of a solar photovoltaic tracking reducer according to Example 2 of the present application.

[0025] Description of reference numerals:

[0026] 1. Housing, 11. Hard limit block, 2. Gear, 21. Ring gear, 22. First limit protrusion, 23. Second limit protrusion, 3. Worm, 4. End cover. DETAILED DESCRIPTION

[0027] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0028] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] This preferred embodiment is for example Figures 2 to 7 The figure shows a solar photovoltaic tracking reducer, comprising a housing 1, a gear 2, a worm 3 and an end cover 4. The housing 1 is provided with a mounting cavity for the gear 2 and a mounting cavity for the worm 3. The gear ring 21 of the gear 2 is meshed with the worm 3. The end cover 4 is fixed to the housing 1 by a plurality of bolts to limit the axial range of motion of the gear 2. The housing 1 is as shown in FIG. Figure 8 The top of the inner wall is provided with two spaced apart limit blocks 11, the distance between the limit blocks 11 is slightly greater than the thickness of the gear ring 21, and the gear 2 is as shown in FIG. Fig. 9 As shown, a symmetrical first limiting protrusion 22 and a second limiting protrusion 23 are provided on one side of the gear ring 21 near the end cover 4. The two limiting blocks 11 and the two pairs of first limiting protrusions 22 and second limiting protrusions 23 on both sides of the gear ring 21 constitute a double hard limiting structure of the reducer. During the normal rotation and rotation of the gear 2, the gear ring 21 moves between the two limiting blocks 11. The sum of the angles between the outer end faces of the first limiting protrusion 22 and the outer end faces of the second limiting protrusion 23 and the arc angle of the limiting block 11 is less than or equal to 170°, that is, as shown in FIG. Figure 3 and 4 When the outer end surface of the first limiting protrusion 22 abuts against one end of the limiting stopper 11, the angle between the outer end surface of the second limiting protrusion 23 and the other end of the limiting stopper 11 is greater than or equal to 190°, or as shown in FIG. Figure 6 and 7As shown, when the outer end face of the second limiting protrusion 23 abuts against the other end of the limiting block 11, the angle between the outer end face of the first limiting protrusion 22 and one end of the limiting block 11 is greater than or equal to 190°. The difference between the arc angle of the gear ring 21 of the gear 2 and the arc angle of the worm 3 is greater than or equal to 180°; here, the arc angle of the worm 3 is the angle between the two ends of the worm teeth of the worm 3 and the axis of the gear 2, with the axis of the gear 2 as the center. In this way, when the photovoltaic panel is in a horizontal state, the middle part of the gear ring 21 of the gear 2 is meshed with the worm 3 (not shown), at this time, the angle between the first end face of the gear ring 21 close to the first limiting protrusion 22 and the end face of the worm teeth of the worm 3 close to it is greater than or equal to 90°, and the angle between the second end face of the gear ring 21 close to the second limiting protrusion 23 and the end face of the worm teeth of the worm 3 close to it is also greater than or equal to 90°, so that in both hard limiting states, the photovoltaic panel can be rotated to be perpendicular to the ground.

[0031] The outer end face of the first limiting protrusion 22 and the outer end face of the second limiting protrusion 23 refer to the end faces that are farther apart from each other, and the end faces that are closer to each other from the corresponding first limiting protrusion 22 and the second limiting protrusion 23 are called inner end faces. In this embodiment, when the outer end face of the first limiting protrusion 22 abuts against one end of the limiting stopper 11, the second end of the gear ring 21 close to the second limiting protrusion 23 meshes with the worm 3; when the outer end face of the second limiting protrusion 23 abuts against the other end of the limiting stopper 11, the first end of the gear ring 21 close to the first limiting protrusion 22 meshes with the worm 3.

[0032] In this embodiment, the angle between the first end surface of the gear ring 21 and the outer end surface of the first limiting protrusion 22 is 65°; the angle between the second end surface of the gear ring 21 and the outer end surface of the second limiting protrusion 23 is also 65°.

[0033] Example 2

[0034] This preferred embodiment is for example Figures 10 to 12 Another solar photovoltaic tracking reducer is shown, comprising a housing 1, a gear 2, a worm 3 and an end cover 4. The housing 1 is provided with a mounting cavity for the gear 2 and a mounting cavity for the worm 3. The gear ring 21 of the gear 2 is meshed with the worm 3. The end cover 4 is fixed to the housing 1 by a plurality of bolts to limit the axial range of motion of the gear 2. The housing 1 is as shown in FIG. Fig.13 As shown, a limit stopper 11 is provided on the top of the housing 1 near the end cover 4. Fig.14 As shown, a first limit block 22 and a second limit block 23 are symmetrically provided on one side of the gear ring 21 close to the end cover 4, and the limit block 11 and the first limit block 22 and the second limit block 23 constitute a hard limit structure of the reducer.

[0035] Similarly, the sum of the included angles of the outer end faces of the first limiting protrusion 22 and the second limiting protrusion 23 and the arc angle of the limiting stopper 11 is less than or equal to 170°, that is, Fig.11 When the outer end surface of the first limiting protrusion 22 abuts against one end of the limiting stopper 11, the angle between the outer end surface of the second limiting protrusion 23 and the other end of the limiting stopper 11 is greater than or equal to 190°, or as shown in FIG. Fig.12 As shown, when the outer end face of the second limiting protrusion 23 abuts against the other end of the limiting block 11, the angle between the outer end face of the first limiting protrusion 22 and one end of the limiting block 11 is greater than or equal to 190°; the difference between the arc angle of the gear ring 21 of the gear 2 and the arc angle of the worm 3 is greater than or equal to 180°, where the arc angle of the worm 3 is still centered on the axis of the gear 2, and the angle between the two ends of the worm teeth of the worm 3 and the axis of the gear 2. When the photovoltaic panel is in a horizontal state, the middle part of the gear ring 21 of the gear 2 is meshed with the worm 3 (not shown), at this time, the angle between the first end face of the gear ring 21 close to the first limiting protrusion 22 and the worm tooth end face of the worm 3 is greater than or equal to 90°, and the angle between the second end face of the gear ring 21 close to the second limiting protrusion 23 and the worm tooth end face of the worm 3 is also greater than or equal to 90°. In these two hard limit conditions, the photovoltaic panel can be rotated to be perpendicular to the ground.

[0036] In some embodiments, the angle between the two end faces of the stopper 11 is 30° to 50°. In the above embodiment, the angle between the two end faces of the stopper 11 is 40°, and the center of the angle between the two end faces is on the axis of the gear 2.

[0037] In the above embodiment, the thickness of the limit stopper 11 is the same as the thickness of the first limit protrusion 22 and the second limit protrusion 23. The thickness of the limit stopper 11 is smaller than the thickness of the gear ring 21.

[0038] In the above embodiment, the arc angle of the notch of the gear ring 21 of the gear 2 is greater than the arc angles of the two end surfaces of the limit stopper 11 .

[0039] In the above embodiment, the first limiting protrusion 22 and the second limiting protrusion 23 are integrally constructed with the gear ring 21 of the gear 2, and the limiting block 11 is integrally constructed with the housing 1. Of course, in some rotary reducers equipped with small photovoltaic panels, the first limiting protrusion 22 and the second limiting protrusion 23 and the gear ring 21 of the gear 2 can adopt a split structure and be fixed by bolts or the like, and the limiting block 11 and the housing 1 can also adopt a split structure and be fixed by bolts or the like, but there will be insufficient connection strength, the bolts will be cut off or deformed and bent, causing the photovoltaic assembly to collide with the bracket.

[0040] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A reducer for solar photovoltaic tracking, comprising a housing, an end cover, a gear and a worm, wherein a limit stopper is provided on the top of the housing, and a hard limit structure is provided between the limit stopper and the gear; characterized in that: A symmetrical first limiting protrusion and a second limiting protrusion are provided on at least one side of the gear ring, and the limiting stopper, the first limiting protrusion and the second limiting protrusion constitute the hard limiting structure; the sum of the included angle between the outer end surface of the first limiting protrusion and the outer end surface of the second limiting protrusion and the arc angle of the limiting stopper is less than or equal to 170°; the difference between the arc angle of the gear ring and the arc angle of the worm is greater than or equal to 180°; When the outer end surface of the first limiting protrusion abuts against one end of the limiting block, the second end portion of the ring gear close to the second limiting protrusion is meshed with the worm; when the outer end surface of the second limiting protrusion abuts against the other end of the limiting block, the first end portion of the ring gear close to the first limiting protrusion is meshed with the worm.

2. A solar photovoltaic tracking reducer according to claim 1, characterized in that: The other side of the gear ring is also provided with a symmetrical first limiting protrusion and a second limiting protrusion, and the top of the shell is provided with another limiting block; the other limiting block and the first limiting protrusion and the second limiting protrusion on the other side constitute another set of hard limiting structures.

3. A solar photovoltaic tracking reducer according to claim 1 or 2, characterized in that: The angle between the two end surfaces of the limit stopper is 30° to 50°.

4. A solar photovoltaic tracking reducer according to claim 1 or 2, characterized in that: The included angle between the first end surface of the gear ring and the outer end surface of the first limiting protrusion is 65°; the included angle between the second end surface of the gear ring and the outer end surface of the second limiting protrusion is also 65°.

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