Transmission Bearing Preload Assembly Without Shim Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing transmission devices with rolling bearings face challenges in reducing noise and vibration due to manufacturing tolerances and thermal expansion, requiring complex shim-based preload systems that are cumbersome and prone to errors.
Innovation Solution
A method for manufacturing a transmission device that uses a preloading element to axially preload rolling bearings within the casing, eliminating the need for shims by applying a controlled force to achieve a predetermined preload value, thereby simplifying the process and enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If shims of variable thickness are used to preload rolling bearings, then noise and vibration are reduced, but manufacturing complexity and operation time increase
Solution Approach 1:
The invention extracts and eliminates the shim component from the bearing preload system. Instead of using shims of variable thickness to achieve preload, the patent applies preload directly through the casing structure during assembly, removing the need for separate shim components and their associated complexity.
Solution Approach 2:
The invention applies bearing preload as a preliminary action during the assembly process itself. The casing is designed to apply the predetermined axial force on the rolling bearings when the casing parts are attached together, eliminating the need for subsequent shim installation and adjustment operations.
2Object-affected harmful factors
If shims of variable thickness are used to preload rolling bearings, then noise and vibration are reduced, but the risk of noncompliance increases
Solution Approach 1:
The invention changes the approach from using variable thickness parameters of multiple shim components to a single predetermined axial force parameter applied by the casing structure. This standardizes the preload parameter and eliminates variability issues associated with selecting the correct shim thickness.
Solution Approach 2:
By removing the shim component entirely, the invention eliminates the source of compliance errors related to shim selection, installation, and thickness verification. The preload is applied directly through the casing attachment process, ensuring consistent and reliable results.
3Manufacturing precision
If shims are used to mount shafts without axial play, then positioning precision is improved, but manufacturing time increases
Solution Approach 1:
The casing is designed to apply the predetermined axial force on the rolling bearings as a preliminary action during the assembly process. This eliminates the need for subsequent shim installation and adjustment operations, reducing manufacturing time while maintaining positioning precision.
Solution Approach 2:
The invention merges the bearing preload function with the casing structure itself. The casing parts, when attached together, simultaneously provide structural support and apply the necessary preload to the bearings, eliminating the need for separate shim components and operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively limits noise and vibration by ensuring consistent axial preload on rolling bearings, improving the operational stability of the transmission device without the complexity of shim-based systems.
Implementation Method 1
applying a force to the preloading element so as to continue the axial movement of the preloading element with respect to the first part of the casing in the first direction until the applied force reaches a set value and the preloading element reaches a preloading position corresponding to said set value and in which a predetermined axial preloading force is applied by the preloading element and the axial bearing surface of the casing to the first bearing and the second bearing
Data Source
AI summary
A method for manufacturing a transmission device that includes a casing, and a rotary part rotatably guided inside the casing by means of a first bearing and a second bearing. The method includes axially moving a preloading element in a first recess until it bears axially against the first bearing in the first direction, and then applying a force to the preloading element until the applied force reaches a set value and the preloading element reaches a preloading position in which a predetermined axial preloading force is applied by the preloading element and the axial bearing surface of the casing to the first bearing and the second bearing, respectively. The preloading element is attached to the casing in in the preloading position.