Drive Transmitting Device Resin Support Metal Stud Radial Load
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drive transmitting devices face issues with excessive radial loads causing the supporting member to weld, particularly when a belt is used to transmit driving force, leading to potential misalignment and increased costs due to the need for a larger metal support.
Innovation Solution
A drive transmitting device design where a metal stud with a spring holder and coil spring supports a drive side coupling member, allowing the drive connecting member to be inserted axially and securely, preventing tilting and reducing part costs by using a resin material for the coupling member and metal for the stud, with helical teeth on the gear to prevent disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a resin supporting member is used to support the first rotary body, then manufacturing cost is reduced, but the supporting member may weld under excessive radial load
Solution Approach 1:
The support structure is divided into two functional parts: a resin supporting member for cost reduction and a metal stud for structural reinforcement. The metal stud is embedded in the resin support to specifically handle radial loads, while the resin provides overall support and cost benefits. This segmentation allows each material to perform its optimal function.
Solution Approach 2:
The invention uses a composite support structure combining resin and metal materials. The resin supporting member is reinforced with a metal stud that protrudes into the first rotary body, creating a hybrid structure that leverages the low cost and ease of manufacture of resin while utilizing the high strength and load-bearing capacity of metal to prevent welding under radial loads.
2Reliability
If a larger metal support is used to prevent welding, then support stability is improved, but device complexity and cost increase
Solution Approach 1:
Instead of using a large metal support throughout, the invention segments the support function: the resin supporting member provides general support while a localized metal stud reinforces only the critical load-bearing area where the first rotary body contacts the support. This reduces overall device complexity while maintaining stability.
Solution Approach 2:
The metal stud is positioned locally at the critical interface between the first rotary body and the supporting member, providing enhanced strength only where needed to prevent welding under radial load. The rest of the supporting structure remains as simple resin, avoiding unnecessary complexity and cost.
3Ease of manufacture
If the support does not extend to the gear area, then manufacturing is simpler, but the first rotary body may tilt under load
Solution Approach 1:
The metal stud is preliminarily positioned and embedded in the resin supporting member during manufacturing, creating a pre-reinforced support structure. This preliminary action ensures that when the first rotary body is installed, the critical load-bearing path is already strengthened, preventing tilting without requiring complex post-assembly adjustments.
Solution Approach 2:
The metal stud extends specifically to the gear area where radial loads are applied, providing localized reinforcement at the critical interface. This local quality enhancement prevents rotary body tilting under load while keeping the rest of the support structure simple and easy to manufacture.
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
The solution stabilizes the drive transmitting device under radial loads, prevents welding, and reduces part costs by allowing the support to extend to the gear area, ensuring efficient drive transmission while maintaining device stability and reducing angular speed variations.
Implementation Method 1
a metal stud with a spring holder and coil spring supports a drive side coupling member
Data Source
AI summary
A drive transmitting device, which is included in an image forming apparatus, includes a support, a first rotary body, a second rotary body, and a connector. The first rotary body is rotatably supported by the support and includes a support receiving portion with an opening disposed at a center of rotation of the first rotary body. The second rotary body has having an opening at a center of rotation of the second rotary body. The connector has one end inserted into the opening of the support receiving portion of the first rotary body and another end inserted into the opening of the second rotary body in an axial direction of the connector and connect the first rotary body and the second rotary body. The support is inserted into the opening of the support receiving portion of the first rotary body.