Rotary speed reducer

Abstract

The utility model discloses a rotary speed reducer which comprises a shell, a gear, a worm and an end cover. A first limiting protruding block and a second limiting protruding block are symmetrically arranged on the side, close to the end cover, of the gear ring of the gear, a limiting check block protruding towards the gear is arranged on the top of the inner wall of the end cover, and a hard limiting structure of the rotary speed reducer is formed between the limiting check block and the first limiting protruding block and between the limiting check block and the second limiting protruding block. The gear mounting structure has the advantages that the gear is mounted when the end cover is not assembled, the meshing operation of the gear ring of the gear and the worm cannot be hindered due to the fact that the shell is not provided with hard limit, operation is convenient, and after the gear is mounted, the end cover is horizontally pushed, and the end cover and the shell are fixed through bolts, so that integral assembly can be completed.

Description

Technical Field

[0001] The utility model relates to the technical field of solar photovoltaic tracking devices, in particular to a rotary reducer. 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 gear and the worm are meshed. 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 stop is set at the top. The gear limit stop is to cut the gear ring of the whole tooth in half and use the end faces of the gear ring as the limit stop. Due to the existence of the top limit stop, this kind of slewing reducer will hinder the meshing assembly of the gear and the worm, which needs to be improved. Utility Model Content

[0004] The technical problem to be solved by the present application is to overcome the defects of the above related technologies and provide a rotary reducer which is relatively easy to assemble.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a rotary reducer, including a housing, a gear, a worm and an end cover; a first limit protrusion and a second limit protrusion are symmetrically provided on one side of the gear ring close to the end cover, and a limit block protruding toward the gear is provided on the top of the inner wall of the end cover, and the limit block and the first limit protrusion and the second limit protrusion constitute a hard limit structure of the rotary reducer.

[0006] Compared with the related art, the rotary reducer of the present application has the following advantages: the gear is installed when the end cover is not assembled. Since there is no hard limit on the housing, the meshing operation of the gear ring and the worm will not be hindered, and the operation is relatively convenient. After the installation of the gear is completed, the end cover is pushed horizontally, and the end cover and the housing are fixed with bolts to complete the overall assembly.

[0007] As an improvement, the sum of the 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 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°. 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 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.

[0008] Preferably, 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] Preferably, the thickness of the overlapping portion of the limit stopper and the first limit protrusion is smaller than the thickness of the limit stopper and the thickness of the first limit protrusion, so that during the rotation and revolving of the gear, the end face of the limit stopper does not rub against the surface of the gear ring, and the end faces of the first limit protrusion and the second limit protrusion do not rub against the inner wall of the end cover.

[0010] Preferably, the thickness of the overlapping portion between the limit stopper and the first limit protrusion is 1 / 2 to 2 / 3 of the thickness of the gear ring, so that the first limit protrusion and the limit stopper have sufficient contact thickness during hard limiting to form a stable limiting relationship.

[0011] Preferably, when the outer end face of the first limiting protrusion abuts against one end of the limiting stopper, 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 stopper, the first end of the gear ring near the first limiting protrusion meshes with the worm. During the rotation and slewing process of the gear, the gear ring and the worm are stably meshed, and the meshing relationship between the two will not be disengaged.

[0012] 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

[0013] Figure 1 It is a three-dimensional schematic diagram of a rotary reducer of the present application (without photovoltaic panels). Figure 2It's Benshen

[0014] Please provide a cross-sectional schematic diagram of a rotary reducer.

[0015] Figure 3 It is an AA cross-sectional schematic diagram of a rotary reducer in a hard limit state of the present application.

[0016] Figure 4 It is an AA cross-sectional schematic diagram of another hard limit state of a rotary reducer of the present application. Figure 5 This

[0017] A three-dimensional schematic diagram of a gear of a rotary reducer of the application.

[0018] Figure 6 It is a three-dimensional schematic diagram of an end cover of a rotary reducer of the present application.

[0019] Note:

[0020] 1. Housing, 2. Gear, 21. Ring gear, 22. First limiting protrusion, 23. Second limiting protrusion, 3. Worm, 4. End cover, 41. Hard limiting block. DETAILED DESCRIPTION

[0021] 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.

[0022] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] This preferred embodiment is for example Figures 1 to 4 The figure shows a rotary reducer for photovoltaic tracking, 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 gear 2 is as shown in FIG. Figure 5 As shown in the figure, a first stopper 22 and a second stopper 23 are symmetrically provided on one side of the gear ring 21 close to the end cover 4. The end cover 4 is as shown in the figure. Figure 6 A limit stopper 41 protruding toward the gear 2 is provided on the top of the inner wall, and the limit stopper 41 and the first limit protrusion 22 and the second limit protrusion 23 form two hard limit structures of the rotary reducer.

[0024] As an improvement, 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 41 is less than or equal to 170°. Figure 3When the outer end surface of the first limiting protrusion 22 abuts against one end of the limiting stopper 41, the angle between the outer end surface of the second limiting protrusion 23 and the other end of the limiting stopper 41 is greater than or equal to 190°, or as shown in FIG. Figure 4 As shown, when the outer end face of the second limiting protrusion 23 abuts against the other end of the limiting block 41, the angle between the outer end face of the first limiting protrusion 22 and one end of the limiting block 41 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 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. 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 the photovoltaic panel can be rotated to be perpendicular to the ground. The outer end faces of the first limiting protrusion 22 and the second limiting protrusion 23 refer to the end faces which are farther apart from each other, and the end faces which are closer to each other from each other are called inner end faces.

[0025] In this embodiment, when the outer end surface of the first limiting protrusion 22 abuts against one end of the limiting block 41, the second end portion of the ring gear 21 close to the second limiting protrusion 23 is meshed with the worm 3; when the outer end surface of the second limiting protrusion 23 abuts against the other end of the limiting block 41, the first end portion of the ring gear 21 close to the first limiting protrusion 22 is meshed with the worm 3.

[0026] 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°.

[0027] In some embodiments, the angle between the two end faces of the stopper 41 is 30° to 50°. In this embodiment, the angle between the two end faces of the stopper 41 is 40°, and the center of the angle between the two end faces is on the axis of the gear 2.

[0028] In this embodiment, the thickness of the overlapping portion between the limit stopper 41 and the first limit protrusion 22 is smaller than the thickness of the limit stopper 41 and the thickness of the first limit protrusion 22 .

[0029] In some embodiments, the thickness of the overlapping portion between the limiting stopper 41 and the first limiting protrusion 22 is 1 / 2 to 2 / 3 of the thickness of the gear ring 21 .

[0030] In this 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 41 is integrally constructed with the end cover 4. 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 can adopt a split structure and be fixed by bolts or the like, and the limiting block 41 and the end cover 4 can also adopt a split structure and be fixed by bolts or the like, as some conventional replacements for this embodiment.

[0031] 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.

[0032] The ends mentioned above are based on the circumferential direction of the gear 2 , and the sides mentioned above are based on the axial direction of the gear 2 .

Claims

1. A rotary reducer, comprising a housing, a gear, a worm and an end cover; characterized in that: A first limiting protrusion and a second limiting protrusion are symmetrically provided on one side of the gear ring close to the end cover, and a limiting block protruding toward the gear is provided on the top of the inner wall of the end cover. The limiting block and the first limiting protrusion and the second limiting protrusion constitute a hard limiting structure of the rotary reducer.

2. A rotary reducer according to claim 1, characterized in that: 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 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°.

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

4. A rotary reducer according to any one of claims 1 to 3, characterized in that: The thickness of the overlapping portion between the limit stopper and the first limit protrusion is smaller than the thickness of the limit stopper and the thickness of the first limit protrusion.

5. A rotary reducer according to claim 4, characterized in that: The thickness of the overlapping portion between the limit stopper and the first limit protrusion is 1 / 2 to 2 / 3 of the thickness of the gear ring.

6. A rotary reducer according to claim 1, characterized in that: 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.

7. A rotary reducer according to claim 6, 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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