Power Transmission Device With Input Gear Synchronization
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Solution Overview
Problem
Conventional torque transmission devices require multiple pinions and driving devices due to limited rack size, making synchronization of speeds difficult and delaying high-speed transmission applications, while also lacking sufficient nominal load capacity and deceleration rates.
Innovation Solution
A transmission device that uses a single driving device to power multiple pin gears with a rack of limited size, featuring a rotation support bearing unit and input gear with trochoid, cycloid, or involute tooth profiles to enable both rotational and linear motions, reducing the number of parts and increasing load capacity without complex deceleration devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple pinions and driving devices are used to increase nominal load capacity with a limited rack size, then load capacity increases, but device complexity and synchronization difficulty increase
Solution Approach 1:
The patent combines multiple pinion driving functions into a single driving device that can simultaneously or sequentially engage multiple pinions. This merging approach maintains the increased load capacity provided by multiple pinions while eliminating the complexity of multiple independent driving devices, directly resolving the technical contradiction between load capacity and device complexity
Solution Approach 2:
The single driving device is designed with multi-functionality to control multiple pinions, making one device perform the work of several. This universal approach allows the system to achieve high nominal load capacity through multiple pinions while avoiding the complexity and synchronization issues of multiple separate driving devices
2Strength
If multiple pinions are used to increase load capacity, then nominal load capacity increases, but synchronization of driving devices becomes difficult
Solution Approach 1:
By merging multiple driving functions into a single driving device, the patent eliminates the synchronization problem entirely. The single device inherently coordinates all pinions without requiring complex synchronization mechanisms, thus maintaining high load capacity while ensuring reliable operation
Solution Approach 2:
The single driving device acts as an intermediary that coordinates the operation of multiple pinions. It provides a centralized control point that ensures proper timing and synchronization of all pinions engaging with the rack, eliminating the reliability issues associated with synchronizing multiple independent driving devices
3Speed
If a complex deceleration device is used to achieve desired deceleration rate, then deceleration rate improves, but device complexity increases
Solution Approach 1:
The patent achieves the desired deceleration rate by optimizing the tooth profile parameters and geometric dimensions of the pinions and rack rather than using complex deceleration mechanisms. By changing the parameters of the existing gear system, the system attains the required speed control while maintaining simplicity
Solution Approach 2:
The deceleration function is segmented into the basic gear engagement between pinions and rack, with the deceleration ratio determined by the tooth count ratio. This segmentation eliminates the need for separate complex deceleration devices while still achieving the desired deceleration rate through the fundamental gear mechanism
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 configuration allows for increased nominal load capacity and desired deceleration rates, improving power transmission efficiency by enabling all rolling motions with reduced complexity and footprint, thus enhancing the device's applicability in industrial machines.
Implementation Method 1
enabling all rolling motions including a rotational motion by an input gear and a linear motion by a rack
Implementation Method 2
a transmission device for converting a torque which includes a rack having a plurality of rack tooth profiles, a plurality of pin gears provided separated from each other in a lengthwise direction of the rack, each pin gear having a plurality of power transmission pins relatively rotating along the plurality of rack tooth profiles for power transmission
Data Source
AI summary
Disclosed is a power transmission device. A power transmission device according to one embodiment of the present invention includes: a rack having a plurality of rack tooth profiles; a plurality of pin gears, which have a plurality of power transmission pins that rotate relative to the rack tooth profiles for power transmission, and are provided at a distance from each other along the lengthwise direction of the rack; and input gears which are disposed between the pin gears and rotatively connect the plurality of pin gears such that the pin gears rotate at the same speed as each other.