Spindle Self-Locking Mechanism With False Trigger Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The spindle self-locking mechanism of electric tools lacks a triggering prevention device, leading to accidental triggering during operation or when the tool is turned off, causing damage to gears, motors, and potential injuries due to inertial forces.
Innovation Solution
A false triggering prevention device comprising a blocking member with a rotating portion, connecting portion, and blocking portion, connected to a gear via an elastic element, which covers the self-locking hole during rotation to prevent pin insertion and automatically exposes it when stopped, allowing the self-locking pin to engage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spindle self-locking mechanism is provided without a triggering prevention device, then the structure is simple and easy to operate, but accidental triggering occurs during operation causing damage to gears, motors, and potential injuries
Solution Approach 1:
The blocking member is pre-positioned to cover the self-locking hole during gear rotation, preventing accidental triggering before it can occur. The elastic element maintains this blocking position automatically during operation and only allows access when the gear stops rotating, thus performing the prevention action in advance.
Solution Approach 2:
The blocking member acts as an intermediary between the self-locking hole and the self-locking pin. It selectively blocks or allows pin insertion based on the gear's rotational state, mediating the interaction between the locking mechanism and external triggering forces while maintaining structural simplicity.
2Object-affected harmful factors
If a blocking member is added to prevent accidental triggering, then safety is improved, but the device complexity increases
Solution Approach 1:
The blocking member is designed to function automatically based on the gear's rotational state. During rotation, centrifugal force or geometric constraints cause the blocking member to cover the self-locking hole. When the gear stops, the elastic element automatically returns the blocking member to its initial position, exposing the self-locking hole. This self-service mechanism eliminates the need for additional control systems or complex actuation mechanisms.
Solution Approach 2:
The blocking member's position is dynamically changed based on the gear's rotational parameter. During rotation, the blocking member shifts to cover the self-locking hole; when rotation stops, it returns to expose the hole. This parameter-based control allows the system to adapt its safety state based on operational conditions without adding complex control logic.
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
Prevents accidental triggering of the spindle self-locking mechanism, ensuring equipment safety and preventing damage by maintaining the self-locking pin's correct locking position, thus avoiding adverse consequences.
Implementation Method 1
one end of the elastic element is connected to the gear; the other end of the elastic element is connected to the connecting portion
Implementation Method 2
When the gear rotates, the blocking portion of the blocking member under a centrifugal force rotates around the rotating portion to cover the self-locking hole on the gear
Data Source
AI summary
A false triggering prevention device for a spindle self-locking mechanism of an electric tool, includes a blocking member and an elastic element, where the blocking member includes a rotating portion, a connecting portion and a blocking portion that are sequentially connected to one another; one end of the elastic element is connected to a gear; the other end of the elastic element is connected to the connecting portion; the rotating portion is rotatably connected to a self-locking surface of the gear, such that the blocking member has a rotating state and a static state; when the blocking member is in the rotating state, the blocking portion covers a self-locking hole to prevent insertion of the self-locking pin into the self-locking hole; and when the blocking member is in the static state, the blocking portion does not cover the self-locking hole.