Axial positioning device for sun wheel of walking speed reducer of engineering machinery

Abstract

A sun wheel axial positioning device of an engineering machinery walking speed reducer relates to the technical field of engineering machinery wheel edge planetary speed reducers and is used for solving the technical problems that in the prior art, a sun wheel positioning end face is abraded fast, and running noise of a whole walking speed reducer is large. The running stability of the whole walking speed reducer can be effectively improved, and the service life of the walking speed reducer is effectively prolonged. In the axial positioning device for the sun wheel of the walking speed reducer of the engineering machinery, a first deep groove ball bearing is connected with a spline connecting sleeve through an elastic check ring for a shaft, and the assembled first deep groove ball bearing and the spline connecting sleeve are installed in a component of a final-stage planet carrier; the second deep groove ball bearing is arranged in an inner hole of the final-stage sun gear, and the right end of the second deep groove ball bearing is positioned by using the circlip for the hole; the final-stage sun gear is arranged in the speed reducer, and the right end face of the spline connecting sleeve is made to make contact with the inner ring of the second deep groove ball bearing assembled in the inner hole.

Description

Technical Field

[0001] This utility model relates to the field of planetary reducers for engineering machinery wheels, and in particular to an axial positioning device for the sun gear of a traveling reducer for engineering machinery. Background Technology

[0002] Currently, the travel reducer for construction machinery is mainly used in the travel devices of various construction machinery (including tracked and wheeled types) and flatbed transport vehicles. It has many advantages such as large transmission ratio, high transmission efficiency, high torque density and compact structure.

[0003] The travel reducer of construction machinery is a core component of the drive system of construction vehicles. During operation, it not only needs to output torque to drive the vehicle, but also bears the weight of the vehicle and the impact loads during operation. Therefore, ensuring a low accident rate throughout the entire life cycle of the travel reducer is particularly important. Due to its technical characteristic of opposite input and output directions, the sun gear is often a hollow structure, and the positioning method between the sun gears plays a crucial role in the smooth operation of the entire travel reducer.

[0004] Due to the continuous development and iteration of engineering machinery reducer technology in recent years, engineering machinery travel reducers also need to be constantly innovated to adapt to various working conditions and ensure good operation throughout their entire life cycle. Especially during no-load high-speed operation, the reducer input speed can reach over 4000 rpm, which poses a significant challenge to the traditional axial positioning method of hardened end face grinding of the sun gear; and in comparison, deep groove ball bearing positioning with a maximum speed of tens of thousands of rpm is obviously more advantageous. Utility Model Content

[0005] The purpose of this utility model is to provide an axial positioning device for the sun gear of a traveling reducer for engineering machinery, which solves the technical problems of rapid wear of the sun gear positioning end face and high noise of the traveling reducer in the prior art; it can effectively improve the stability of the traveling reducer and effectively extend the service life of the traveling reducer.

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

[0007] An axial positioning device for the sun gear of a traveling reducer for engineering machinery includes: a final stage sun gear, a spline sleeve, a first deep groove ball bearing, a second deep groove ball bearing, a shaft elastic retaining ring, a hole elastic retaining ring, and a final stage planetary carrier.

[0008] The first deep groove ball bearing is connected to the spline sleeve via the shaft elastic retaining ring, and the assembled first deep groove ball bearing and the spline sleeve are installed in the component of the last stage planetary carrier; the second deep groove ball bearing is installed in the inner hole of the last stage sun gear, and is positioned at the right end of the bearing using the bore elastic retaining ring; the last stage sun gear is installed in the reducer, and the right end face of the spline sleeve contacts the inner ring of the second deep groove ball bearing installed in the inner hole.

[0009] In practical applications, a dimensional chain is used to control the axial positioning of the right end of the final stage sun gear using the second deep groove ball bearing, while a gap is left between the left end of the final stage sun gear and the spline sleeve to avoid wear on the end face of the sun gear.

[0010] Compared with existing technologies, the axial positioning device for the sun gear of the engineering machinery travel reducer described in this utility model has the following advantages:

[0011] The axial positioning device for the sun gear of the engineering machinery travel reducer provided by this utility model optimizes the traditional hard-on-hard axial positioning method of the final stage of the engineering machinery travel reducer to a deep groove ball bearing positioning method. Utilizing the characteristic that a single-row deep groove ball bearing can withstand both radial and bidirectional axial loads even at high speeds, and through the cooperation between the spline sleeve, the second deep groove ball bearing, and the elastic retaining ring of the bore, as well as the control of the overall assembly dimension chain, the left end face of the final stage sun gear is suspended, thereby effectively reducing the wear on the sun gear positioning surface during the operation of the reducer, thus effectively improving the overall stability of the travel reducer and effectively extending the service life of the reducer. Attached Figure Description

[0012] Figure 1 A schematic diagram of the structure of the axial positioning device for the sun gear of the engineering machinery travel reducer provided in this embodiment of the utility model.

[0013] Figure label:

[0014] 1-Splined sleeve; 2-First deep groove ball bearing; 3-Shaft retaining ring; 4-Last stage sun gear; 5-Second deep groove ball bearing; 6-Bore retaining ring. Detailed Implementation

[0015] For ease of understanding, the axial positioning device for the sun gear of the engineering machinery travel reducer provided in the present invention will be described in detail below with reference to the accompanying drawings.

[0016] This utility model embodiment provides an axial positioning device for the sun gear of a traveling reducer for engineering machinery, such as... Figure 1As shown, it includes: a final stage sun gear 4, a spline sleeve 1, a first deep groove ball bearing 2, a second deep groove ball bearing 5, a shaft retaining ring 3, a bore retaining ring 6, and a final stage planetary carrier.

[0017] The first deep groove ball bearing 2 is connected to the spline sleeve 1 via a shaft elastic retaining ring 3, and the assembled first deep groove ball bearing 2 and spline sleeve 1 are installed in the component of the last stage planetary carrier; the second deep groove ball bearing 5 is installed in the inner hole of the last stage sun gear 4, and is positioned at the right end of the bearing using a hole elastic retaining ring 6; the last stage sun gear 4 is installed in the reducer, and the right end face of the spline sleeve 1 contacts the inner ring of the second deep groove ball bearing 5 installed in the inner hole.

[0018] In practical applications, the right end of the final stage sun gear 4 is axially positioned using the second deep groove ball bearing 5 through dimensional chain control, while the left end of the final stage sun gear 4 is left with a gap from the spline sleeve 1 to avoid wear on the end face of the sun gear.

[0019] Compared with the prior art, the axial positioning device for the sun gear of the engineering machinery travel reducer described in this embodiment of the invention has the following advantages:

[0020] The axial positioning device for the sun gear of the engineering machinery travel reducer provided in this embodiment optimizes the traditional hard-on-hard axial positioning method of the final stage of the engineering machinery travel reducer to a deep groove ball bearing positioning method. Utilizing the characteristic that a single-row deep groove ball bearing can withstand both radial and bidirectional axial loads even at high speeds, the device achieves the purpose of suspending the left end face of the final stage sun gear 4 through the cooperation between the spline sleeve 1, the second deep groove ball bearing 5, and the elastic retaining ring 6, as well as the control of the overall assembly dimension chain. This effectively reduces the wear on the sun gear positioning surface during the operation of the reducer, thereby effectively improving the overall stability of the travel reducer and extending its service life.

[0021] 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 device for the sun gear of a traveling reducer for engineering machinery, characterized in that, include: The final stage sun gear, spline sleeve, first deep groove ball bearing, second deep groove ball bearing, elastic retaining ring for the shaft, elastic retaining ring for the bore, and final stage planetary carrier; The first deep groove ball bearing is connected to the spline sleeve via the shaft elastic retaining ring, and the assembled first deep groove ball bearing and the spline sleeve are installed in the component of the last stage planetary carrier; the second deep groove ball bearing is installed in the inner hole of the last stage sun gear, and is positioned at the right end of the bearing using the bore elastic retaining ring; the last stage sun gear is installed in the reducer, and the right end face of the spline sleeve contacts the inner ring of the second deep groove ball bearing installed in the inner hole.

2. The axial positioning device for the sun gear of the engineering machinery travel reducer according to claim 1, characterized in that, The dimensional chain control enables the right end of the final stage sun gear to be axially positioned using the second deep groove ball bearing, while the left end of the final stage sun gear has a gap with the spline sleeve.

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