Rotary supporting structure for rotary speed reducer

Abstract

The utility model discloses a rotary support structure for a rotary speed reducer, which comprises a center shaft gear, gear teeth are arranged in the middle of the center shaft gear, gear shaft shoulders are arranged on two sides of the gear teeth, the gear teeth are close to the root parts of the gear shaft shoulders, and antifriction wear-resistant layers are arranged on the gear shaft shoulders close to the end parts of the gear teeth. According to the center shaft gear, the center shaft gear of a self-lubricating structure is adopted, the center shaft gear has the friction-reducing and wear-resisting characteristics and can be directly used as a rotary supporting structure of a rotary speed reducer, and therefore the number of pressing machines and press-fitting procedures in an assembly line is reduced, the production efficiency is improved, and the production cost is reduced. And the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of tracking brackets of photovoltaic systems, in particular to a rotary support structure for a rotary reducer. Background Art

[0002] Tracking mounts have become a mainstream product in the photovoltaic industry. Their power source, the slewing reducer, a key component, is also widely used. Slewing reducers are typically designed as a meshing transmission mechanism consisting of a toroidal worm gear and a central axis gear. The central axis gear, acting as the output, transmits high torque at a low output speed, typically 0.2 rpm.

[0003] Considering its transmission characteristics, the current rotary reducer uses a flanged bushing instead of a rolling bearing as the rotating support component of the center shaft gear to reduce costs and reduce the size of the reducer.

[0004] like Figure 1 As shown, two flanged bushings 4 are distributed at both ends of the center shaft gear 5, serving as rotating support components for realizing the rotational fit between the center shaft gear 5 and the pressure cover 3. At the same time, the center shaft gear 5 is dynamically connected to the toroidal worm 1. In order to achieve the requirement that its outer ring has an interference fit with the base 2 and the pressure cover 3, its inner ring has a clearance fit with the center shaft gear 5. Therefore, during the assembly process, it is necessary to press the flanged bushing 4 into the base 2 and the pressure cover 3 first. The press-fitting process, firstly, increases the difficulty of assembly and requires a special press to operate; secondly, due to its thin thickness, the inner ring will be deformed after press-fitting, forming an ellipse, which affects the clearance fit with the center shaft gear 5 and makes assembly difficult.

[0005] At the same time, if Figure 2 As shown, the flanged bushing 4 is relatively thin, and during the stamping process, tensile cracks may be generated on its neck 41, which reduces the service life of the bushing. Utility Model Content

[0006] The purpose of the present utility model is to provide a rotary support structure for a rotary reducer to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A rotary support structure for a rotary reducer, comprising a central shaft gear, wherein gear teeth are provided in the middle of the central shaft gear, gear shoulders are provided on both sides of the gear teeth, and friction-reducing and wear-resistant layers are provided at the root of the gear teeth near the gear shoulders and at the end of the gear shoulders near the gear teeth;

[0009] The friction-reducing and wear-resistant layer is provided with at least one layer, and the friction-reducing and wear-resistant layer, the gear shaft shoulder, and the gear teeth are an integrated structure.

[0010] As a further solution of the present invention: the friction-reducing and wear-resistant layer includes a shaft shoulder layer integrated with the gear shaft shoulder and a tooth shoulder layer integrated with the gear teeth, and the shaft shoulder layer and the tooth shoulder layer are an integrated structure.

[0011] As a further solution of the present invention: an annular groove for accommodating the friction-reducing and wear-resistant layer is provided on the gear shaft shoulder and the gear teeth.

[0012] As a further solution of the present invention: the friction-reducing and wear-resistant layer is a two-layer structure, comprising a first friction-reducing and wear-resistant layer and a second friction-reducing and wear-resistant layer.

[0013] As a further solution of the present invention: the first friction-reducing and wear-resistant layer is a sintered spherical porous copper powder layer.

[0014] As a further solution of the present invention: the second friction-reducing and wear-resistant layer is a sintered self-lubricating layer, and the material of the self-lubricating layer is polytetrafluoroethylene and graphite.

[0015] As a further solution of the present invention: the center shaft gear is made of ductile iron.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The present application adopts a self-lubricating center shaft gear, which has the characteristics of reducing friction and wearing resistance, and can directly serve as the rotating support structure of the rotary reducer, thereby reducing the press and press-fitting process in the assembly line and reducing production costs;

[0018] 2. The friction-reducing and wear-resistant layer of the present application is not formed by stamping, so there is no stamping deformation, which not only reduces the difficulty of assembly but also increases the service life of the rotating support component. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a diagram of the rotary support structure of a conventional rotary reducer for this application;

[0020] Figure 2 This is a structural diagram of a flanged bushing of a conventional rotary reducer of this application;

[0021] Figure 3 This is a schematic structural diagram of the self-lubricating center shaft gear of this embodiment;

[0022] Figure 4 This is a schematic diagram of the structure of the friction-reducing and wear-resistant layer of the self-lubricating center shaft gear in this embodiment;

[0023] In the figure: 1-annular worm, 2-base, 3-pressure cover, 4-flanged bushing, 41-bushing pressure neck, 5-center shaft gear, 51-gear shoulder, 52-annular groove, 53-gear teeth, 54-friction reducing and wear-resistant layer, 55-shoulder layer, 56-tooth shoulder layer, 57-first friction reducing and wear-resistant layer, 58-second friction reducing and wear-resistant layer. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-4 In an embodiment of the present invention, a rotary support structure for a slewing reducer includes a middle shaft gear 5, a middle portion of the middle shaft gear 5 is provided with gear teeth 53, and both sides of the gear teeth 53 are provided with gear shaft shoulders 51.

[0026] An annular groove 52 for accommodating a friction-reducing and wear-resistant layer 54 is provided on the gear shoulder 51 and the gear tooth 53. A friction-reducing and wear-resistant layer 54 is provided at the root of the gear tooth 53 near the gear shoulder 51 and at the end of the gear shoulder 51 near the gear tooth 53. The friction-reducing and wear-resistant layer 54 is partially located in the annular groove 52. The friction-reducing and wear-resistant layer 54 includes a shoulder layer 55 integrated with the gear shoulder 51 and a tooth shoulder layer 56 integrated with the gear tooth 53. The shoulder layer 55 and the tooth shoulder layer 56 are an integrated structure.

[0027] At least one layer of the friction-reducing and wear-resistant layer 54 is provided. The friction-reducing and wear-resistant layer 54 is an integrated structure with the gear shoulder 51 and the gear teeth 53. In this embodiment, the middle shaft gear 5 is made of ductile iron, and the friction-reducing and wear-resistant layer 54 is a two-layer structure. The friction-reducing and wear-resistant layer 54 includes a first friction-reducing and wear-resistant layer 57 and a second friction-reducing and wear-resistant layer 58. The first friction-reducing and wear-resistant layer 57 is a sintered spherical porous copper powder layer, and the second friction-reducing and wear-resistant layer is a sintered self-lubricating layer. The material of the self-lubricating layer is polytetrafluoroethylene and graphite.

[0028] In this embodiment, powder metallurgy technology is used to sinter a flanged bushing and a center gear to form a self-lubricating center gear 5, a single component. The center gear 5 is primarily constructed from ductile iron, with annular grooves machined on either side of the intermediate gear. First, a layer of spherical porous copper powder is sintered around the groove surface to form a first friction-reducing and wear-resistant layer 57. Next, a layer of materials such as dry polytetrafluoroethylene powder and graphite powder is applied, and sintered again to form a second friction-reducing and wear-resistant layer with a self-lubricating structure.

[0029] The center shaft gear 5 offers friction-reducing and wear-resistant properties, replacing the flanged bushing and serving as the rotary support structure for the slewing reducer. This eliminates the need for presses and press-fitting processes in the assembly line, reducing production costs. Because the rotary support is machined, there is no stamping deformation, which reduces assembly complexity and increases the service life of the rotary support components.

[0030] When in use, the friction-reducing and wear-resistant layer 54 forms a clearance fit with the holes of the base 2 and the pressure cover 3 to provide support for the rotation of the middle shaft gear 5 .

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0032] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A rotary support structure for a rotary reducer, comprising a middle shaft gear (5), wherein a gear tooth (53) is provided in the middle of the middle shaft gear (5), and gear shaft shoulders (51) are provided on both sides of the gear tooth (53), characterized in that: A friction-reducing and wear-resistant layer (54) is provided at the root of the gear tooth (53) close to the gear shoulder (51) and at the end of the gear shoulder (51) close to the gear tooth (53); the friction-reducing and wear-resistant layer (54) is provided with at least one layer, and the friction-reducing and wear-resistant layer (54) and the gear shoulder (51) and the gear tooth (53) are an integrated structure.

2. A rotary support structure for a rotary reducer according to claim 1, characterized in that: The friction-reducing and wear-resistant layer (54) comprises a shaft shoulder layer (55) integrated with the gear shaft shoulder (51) and a tooth shoulder layer (56) integrated with the gear teeth (53); the shaft shoulder layer (55) and the tooth shoulder layer (56) are an integrated structure.

3. A rotary support structure for a rotary reducer according to claim 1 or 2, characterized in that: The gear shaft shoulder (51) and the gear teeth (53) are both provided with an annular groove (52) for accommodating the friction-reducing and wear-resistant layer (54).

4. The rotary support structure for a rotary reducer according to claim 1, characterized in that: The friction-reducing and wear-resistant layer (54) is a two-layer structure, comprising a first friction-reducing and wear-resistant layer (57) and a second friction-reducing and wear-resistant layer (58).

5. The rotary support structure for a rotary reducer according to claim 4, characterized in that: The first friction-reducing and wear-resistant layer (57) is a sintered spherical porous copper powder layer.

6. The rotary support structure for a rotary reducer according to claim 1, characterized in that: The center shaft gear (5) is made of spheroidal graphite cast iron.

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