Axial positioning mechanism between planetary carrier and bearing in planetary reducer

Abstract

An axial positioning mechanism for the planetary carrier and bearing in a planetary reducer relates to the technical field of planetary reducers for wind power and construction machinery. It utilizes an interference-fit bushing to engage with the lower boss of the planetary carrier pin, serving as a load-bearing element between the bearing and the planetary carrier to effectively achieve axial positioning. This also effectively solves the technical problems of high processing difficulty and high production cost of the planetary carrier. In the axial positioning mechanism of the planetary carrier and bearing in the planetary reducer, the interference-fit bushing is installed on the outer circle of the pin boss of the planetary carrier via an interference fit; the cylindrical roller bearing without an outer ring is installed on the planetary carrier via an interference fit; the lower end face of the cylindrical roller bearing without an outer ring is in contact with the upper end face of the interference-fit bushing.

Description

Technical Field

[0001] This utility model relates to the field of planetary reducers for wind power and engineering machinery, and in particular to an axial positioning mechanism for the planet carrier and bearing in a planetary reducer. It can optimize the fit between the planet carrier and bearing in wind power and engineering machinery reducers, and is applicable not only to wind power and engineering machinery, but also to the gear transmission design fields of rail transportation and aviation. Background Technology

[0002] Currently, planetary gear reducers, as core components in the field of precision transmission, are widely used in high-end equipment fields such as industrial automation equipment, aerospace propulsion systems, and wind power new energy systems. They have significant technical advantages: load splitting is achieved through multi-planetary gear meshing, and the power density can reach 2-3 times that of ordinary gearboxes; coaxial input and output, symmetrical structure, and lightweight and compact structure; multi-planetary gears offset radial forces, reduce vibration and noise, operate smoothly, and have high transmission efficiency.

[0003] As a crucial component of transmission devices in related equipment, the performance of planetary reducers directly impacts the overall performance and efficiency of the product. Their operating environment is often characterized by multi-stage, multi-condition, low-speed, heavy-load gear transmission. In engineering practice, planetary reducers, as key hubs for power transmission, have performance parameters that directly determine the operating efficiency and reliability of the final product. Due to the long-term exposure to alternating loads and complex operating conditions, their design must not only meet mechanical integrity and dynamic stability requirements but also consider structural rationality.

[0004] In the existing technology, most planetary reducers use a lower boss on the planetary carrier pin to mate with the bearing in order to achieve axial positioning of the bearing. Therefore, the mating surface between the lower boss on the planetary carrier pin and the bearing must have high hardness and good roughness, which makes it difficult to process, inspect and assemble, and the production cost is high. In addition, the dimensional tolerance of the lower boss on the planetary carrier pin usually has high requirements, but it is difficult to control the dimensions in the production and processing of parts to meet the requirements. Utility Model Content

[0005] The purpose of this utility model is to provide an axial positioning mechanism for the planetary carrier and bearing in a planetary reducer. It utilizes an interference fit between an interference sleeve and the lower end boss of the planetary carrier pin, which serves as a load between the bearing and the planetary carrier to effectively achieve axial positioning. At the same time, it effectively solves the technical problems of high processing difficulty and high production cost of the planetary carrier.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An axial positioning mechanism for a planetary carrier and a bearing in a planetary reducer includes: a planetary carrier, an interference-fit bushing, and a cylindrical roller bearing without an outer ring; the interference-fit bushing is mounted on the outer circle of the pin boss of the planetary carrier by an interference fit; the cylindrical roller bearing without an outer ring is mounted on the planetary carrier by an interference fit; the lower end face of the cylindrical roller bearing without an outer ring is in contact with the upper end face of the interference-fit bushing.

[0008] Compared with the prior art, the axial positioning mechanism between the planetary carrier and the bearing in the planetary reducer of this utility model has the following advantages:

[0009] In the axial positioning mechanism of the planetary carrier and bearing in the planetary reducer provided by this utility model, the interference sleeve is installed on the outer circle of the pin boss of the planetary carrier by interference connection, and the cylindrical roller bearing without outer ring is installed on the planetary carrier by interference fit. The lower end face of the cylindrical roller bearing without outer ring is in contact with the upper end face of the interference sleeve. Therefore, the axial positioning of the planetary carrier and bearing can be effectively realized, thereby effectively avoiding the phenomenon of high processing difficulty and high production cost of the planetary carrier pin boss. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of the axial positioning mechanism between the planetary carrier and the bearing in the planetary reducer provided in this embodiment of the utility model.

[0011] Figure label:

[0012] 1-Planetary carrier; 2-Interference sleeve; 3-Cylindrical roller bearing without outer ring. Detailed Implementation

[0013] For ease of understanding, the axial positioning mechanism of the planetary carrier and bearing in the planetary reducer provided in this embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0014] This utility model embodiment provides an axial positioning mechanism for the planetary carrier and bearing in a planetary reducer, such as... Figure 1 As shown, it includes: a planetary carrier 1, an interference sleeve 2, and a cylindrical roller bearing without an outer ring 3; the interference sleeve 2 is installed on the outer circle of the pin boss of the planetary carrier 1 by interference connection; the cylindrical roller bearing without an outer ring 3 is installed on the planetary carrier 1 by interference fit; the lower end face of the cylindrical roller bearing without an outer ring 3 is in contact with the upper end face of the interference sleeve 2.

[0015] Compared with the prior art, the axial positioning mechanism between the planetary carrier and the bearing in the planetary reducer described in this embodiment of the invention has the following advantages:

[0016] In the axial positioning mechanism of the planetary carrier and bearing in the planetary reducer provided in this embodiment of the utility model, since the interference sleeve 2 is installed on the outer circle of the pin boss of the planetary carrier 1 by interference connection, and the cylindrical roller bearing 3 without outer ring is installed on the planetary carrier 1 by interference fit, the lower end face of the cylindrical roller bearing 3 without outer ring is in contact with the upper end face of the interference sleeve 2, thus effectively realizing the axial positioning of the planetary carrier and bearing, thereby effectively avoiding the phenomenon of high processing difficulty and high production cost of the planetary carrier pin boss.

[0017] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An axial positioning mechanism of a planet carrier and a bearing in a planetary reducer, characterized by, include: Planetary carrier, interference-fit bushing, and cylindrical roller bearing without outer ring; the interference-fit bushing is installed on the outer circle of the pin boss of the planetary carrier by means of interference fit; The cylindrical roller bearing without an outer ring is mounted on the planetary carrier by an interference fit; the lower end face of the cylindrical roller bearing without an outer ring is in contact with the upper end face of the interference fit bushing.

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