Electric Caliper Brake Piston Blocking Member for Fluid Volume Reduction
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Solution Overview
Problem
Conventional electric caliper brakes require excessive brake oil, leading to poor braking feeling and increased weight, which affects fuel efficiency and causes deformation of the caliper housing due to the bulky filling bodies used to reduce the piston's volume.
Innovation Solution
An electric caliper brake design featuring a blocking member with a hollow ring-shaped body and sealing members made of EPDM, integrated by insert injection, which seals the inner space of the piston and reduces the required fluid amount of brake oil by minimizing the volume inside the piston, thereby reducing weight and improving braking feeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a filling body is provided inside the piston to reduce the volume inside the piston, then the required fluid amount of brake oil is reduced, but the weight of the piston is increased and a large load is applied to the caliper housing causing deformation
Solution Approach 1:
The invention extracts the harmful filling body from the piston and replaces it with a blocking member that seals the inner space of the piston. This removes the source of weight increase while still achieving volume reduction. The blocking member is installed between the piston and the nut member, creating a sealed compartment without adding excessive weight.
Solution Approach 2:
The blocking member is designed with a specific structure (including engagement protrusions and engagement grooves) that provides sealing functionality only where needed - in the inner space of the piston. This localized sealing approach reduces brake oil volume without requiring a bulky filling body throughout the entire piston structure.
2Quantity of substance
If a filling body is provided inside the piston to reduce the volume inside the piston, then the required fluid amount of brake oil is reduced, but the caliper housing deforms due to the large load from the bulky filling body
Solution Approach 1:
The invention removes the bulky filling body that causes excessive load on the caliper housing. The blocking member provides the necessary sealing function without the excessive mass, thereby reducing the load on the caliper housing and preventing deformation while maintaining structural integrity.
Solution Approach 2:
The blocking member provides sealing functionality in the specific location where volume reduction is needed, without distributing excessive mass throughout the piston structure. This localized approach reduces the overall load on the caliper housing while achieving the desired volume reduction.
3Quantity of substance
If the volume inside the piston is reduced by using a blocking member, then the required fluid amount of brake oil is reduced, but the structure becomes more complex
Solution Approach 1:
The blocking member is integrated with the existing piston and nut member structures through engagement protrusions and engagement grooves. This merging approach allows the blocking member to be installed without requiring separate mounting operations or additional fastening components, thereby reducing overall structural complexity while achieving volume reduction.
Solution Approach 2:
The blocking member is nested within the existing piston structure, fitting into the inner space without requiring external attachments or modifications to the overall assembly. This nested configuration reduces brake oil volume while maintaining a compact and simple overall structure.
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 effectively reduces the required brake oil and weight of the electric caliper brake, enhancing the braking feeling and fuel efficiency by sealing the inner space of the piston with a blocking member and sealing members, while maintaining structural integrity and ease of assembly.
Implementation Method 1
a blocking member having one end installed at the piston and the other end installed at the rod and configured to seal an inner space of the piston
Implementation Method 2
sealing members made of EPDM
Implementation Method 3
integrated by insert injection
Data Source
AI summary
According to an aspect of the present disclosure, there is provided an electric caliper brake including a carrier at which a pair of pad plates are installed to be movable forward and backward, and a caliper housing slidably installed at the carrier and provided with a cylinder in which a piston having a concave cup-shaped interior is installed to be movable forward and backward by a braking hydraulic pressure, the electric caliper brake comprising: a power converter provided with a spindle member installed to pass through a rear portion of the cylinder and rotated by receiving a rotational force from an actuator, and a nut member configured with a rod screw-coupled to the spindle member and disposed inside the piston and a head portion formed to extend from the rod in a radial direction to be in contact with the piston; and a blocking member having one end installed at the piston and the other end installed at the rod and configured to seal an inner space of the piston.