Scribe Saw Worm Drive With Remote Motor to Cut Weight
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Solution Overview
Problem
Power operated scribe saws in the meat processing industry face challenges due to the high operational and maintenance costs of pneumatic motors, which are typically used to drive the saws, and the increased weight of these motors, affecting efficiency and usability.
Innovation Solution
A power operated scribe saw design featuring a flexible shaft drive transmission coupled to an external electric motor, utilizing a worm screw driveshaft and worm gear mechanism to rotate the cutting blade, which reduces weight and operational costs by eliminating the need for a heavy pneumatic motor within the handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a pneumatic motor is used to drive the scribe saw, then the cutting function is achieved, but the operational and maintenance costs increase
Solution Approach 1:
The motor is extracted from the handle assembly and relocated to a remote position. The patent removes the pneumatic motor from the handle, connecting it via a flexible shaft drive transmission, thereby eliminating the high operational and maintenance costs associated with pneumatic motors while preserving the cutting function.
Solution Approach 2:
The patent replaces the pneumatic motor system with an electric motor system. This substitution eliminates the need for compressed air infrastructure and reduces operational costs while maintaining the required cutting power through the flexible shaft transmission mechanism.
2Power
If a pneumatic motor is disposed in the handle, then the cutting function is achieved, but the weight of the saw increases
Solution Approach 1:
The motor is extracted from the handle assembly and relocated to a remote position. By removing the heavy motor from the handle, the overall weight distribution is improved and the handle becomes lighter and more manageable, while the motor continues to provide sufficient cutting power through the flexible shaft transmission.
Solution Approach 2:
The scribe saw is divided into separate functional components: the handle assembly for user control and the motor assembly for power generation. This segmentation allows the heavy motor to be positioned separately, reducing the weight burden on the handle and improving ergonomics while maintaining full cutting capability.
3Weight of moving object
If a flexible shaft drive transmission with worm screw and worm gear is used, then the weight and vibration are minimized, but the device complexity increases
Solution Approach 1:
The flexible shaft drive transmission acts as an intermediary between the remote electric motor and the cutting blade. This intermediary mechanism efficiently transmits power while minimizing vibration and weight, and the worm screw-worm gear combination provides self-locking capability and high reduction ratio, justifying the added complexity through performance benefits.
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 provides a more efficient and cost-effective power transmission system that minimizes vibration and weight, enhancing the operational efficiency and usability of the scribe saw while reducing maintenance costs.
Implementation Method 1
a worm screw extending radially from and rotating with the worm screw driveshaft... a worm gear extending radially from and rotating with the blade driveshaft, the worm screw and worm gear operatively coupled such that rotation of the worm screw driveshaft causes rotation of the blade driveshaft
Data Source
AI summary
A power operated scribe saw including a head assembly affixed to a handle assembly. The head assembly includes a frame body, a drive train and a cutting blade. The drive train includes a worm driveshaft and worm rotating about a longitudinal axis of rotation and a blade driveshaft and worm gear rotating about a transverse axis of rotation, the cutting blade rotating with the blade driveshaft. The frame body includes a longitudinal throughbore and a transversely extending recess extending into a first side wall, the throughbore including a seating surface. A worm driveshaft support assembly supports the worm driveshaft for rotation and includes a first bearing engaging the worm drive shaft between the distal end of the worm driveshaft and the worm and a second bearing on the seating surface of the throughbore and engaging the worm drive shaft between the proximal end of the driveshaft and the worm.