Electric Brake Actuator Assembly With Axial Bracket Insertion
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Solution Overview
Problem
Existing electric brake apparatuses require complex operations involving both linear and rotational movements to join the electric actuator to the bracket member, leading to poor assemblability.
Innovation Solution
The electric brake apparatus features a simplified joining mechanism where the electric actuator is inserted axially into the bracket member, with a holding unit and elastic engagement unit ensuring secure attachment and reduced exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electric actuator is joined to the bracket member using the bayonet structure requiring linear and rotational operations, then the joining mechanism provides secure engagement, but the assemblability deteriorates due to complex multi-directional operations
Solution Approach 1:
The joining mechanism is segmented into two independent parts: a linear insertion operation that positions the actuator, and a separate rotational locking operation that secures it. This segmentation allows each operation to be simplified and performed independently, improving assemblability while maintaining secure engagement through the dedicated locking mechanism
Solution Approach 2:
The linear insertion operation is performed first to preliminarily position the electric actuator relative to the bracket member, establishing the correct alignment and engagement position before the rotational locking operation is applied. This preliminary positioning simplifies the subsequent locking operation and ensures proper assembly sequence
2Ease of operation
If the electric actuator is allowed to rotate freely during assembly, then the insertion operation is simpler, but the actuator stability deteriorates due to uncontrolled rotational movement
Solution Approach 1:
The holding unit provides dynamic rotational restraint that adapts to the assembly process: it allows controlled rotation during the locking operation to enable engagement, but prevents uncontrolled rotation during insertion and operation. This dynamic control maintains stability while permitting necessary movement during assembly
Solution Approach 2:
The holding unit acts as an intermediary mechanism between the electric actuator and the bracket member, mediating the rotational degrees of freedom. It selectively permits rotation when needed for locking while restraining rotation during insertion and operation, thus stabilizing the actuator without complicating the assembly process
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 excellent assemblability with a single linear operation, enhances the durability of the actuator by restricting rotation, and reduces the overall size and weight of the brake apparatus.
Implementation Method 1
an elastic engagement unit is provided between the bracket member and the electric actuator. The elastic engagement unit includes a protruding engagement portion provided on one of the bracket member and the electric actuator and a recessed engagement portion provided on the other of the bracket member and the electric actuator, and first and second engagement portions are engaged with each other with the aid of elastic deformation of one of the first and second engagement portions
Data Source
AI summary
The present invention provides an excellently assemblable electric brake apparatus configured to allow an electric actuator to be joined to a bracket member based on application of a single operation to this electric actuator. The electric actuator is engaged with the bracket member by inserting the electric actuator into the bracket member along an axial direction of a motor portion included in this electric actuator.