Power Screwdriver Rotary Joint Locking Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Screwdrivers with high torque drive parts pose a safety risk to operators due to the need to apply significant holding torque during screwing operations, which can lead to operator stress and injury.
Innovation Solution
A screwdriver design featuring a rotary joint with a locking device that allows the drive part to be rotated into a comfortable operating position and then blocked, preventing torque transmission to the operator during screwing, enabling the use of high-torque drive devices like battery-operated drill drivers while minimizing operator strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a high-torque drive device is used, then the screwing capability and productivity are improved, but the holding torque required from the operator increases, leading to operator stress and safety risks
Solution Approach 1:
A locking device is introduced as an intermediary mechanism between the drive part and transmission part. This locking device can block the rotary joint, preventing torque transmission from the high-torque drive device to the operator's hand, thereby enabling the use of powerful drive devices without increasing operator burden
2Ease of operation
If the drive part is freely rotatable relative to the transmission part, then the operator can position the drive part comfortably, but torque is transmitted to the operator during screwing, causing stress and safety risks
Solution Approach 1:
The rotary joint transitions from a permanently free state to a dynamically controllable state. The locking device allows the joint to be free during positioning (enabling comfortable operation) and locked during screwing (preventing torque transmission to the operator), thus resolving the contradiction between flexibility and safety
Data Source
Figure 1~2
AI summary
The present invention relates to a power screwdriver (1) having a drive part (3) that has a drive device, and having a transmission part (7). The transmission part (7) has a torque converter and an output shaft (9) which transmit a rotational movement of the drive device. The drive part (3) is connected to the transmission part (7) via a rotational joint (5) by means of which the drive part (3) can rotate relative to the transmission part (7). The rotational joint (5) has a fixing device (19) by means of which the rotational joint (5) can be locked.