Double Hinge Parking Brake Unit Preventing Cable Stretch
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Solution Overview
Problem
Conventional parking brake devices experience cable stretching over time, leading to malfunctions and increased maintenance costs due to the design's reliance on a connection cable that rotates with the operating arm.
Innovation Solution
A double hinge type parking brake device featuring gears on the outer peripheral surfaces of connection members, including a driving gear, rotational force transfer gear, and operating gear, which engage to maintain the initial installation state and prevent cable stretching, comprising a fixing bracket, lever, driving member, rotational force transfer member, operating shaft bracket, and cable guide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a connection cable is used to connect the parking brake lever and the operating shaft, then the device can transmit force over a distance, but the cable stretches over time leading to malfunctions and maintenance issues
Solution Approach 1:
The patent removes the connection cable from the system entirely. Instead of using a cable to transmit force from the operating lever to the operating shaft, the invention uses a direct mechanical linkage through the rotational shaft and rotational arm, eliminating the source of the stretching problem while maintaining force transmission capability
Solution Approach 2:
The patent introduces a rotational shaft and rotational arm as intermediary mechanical components between the operating lever and the operating shaft. These intermediaries transmit force through rigid mechanical connection rather than flexible cable, preventing stretching while maintaining the necessary force transmission function
2Ease of operation
If the connection cable is rotated with the operating arm during parking brake operation, then the brake can be activated, but the cable deforms and stretches reducing reliability
Solution Approach 1:
The patent extracts the cable from the operational mechanism. The operating shaft is directly connected to the rotational shaft through the rotational arm, eliminating the cable's rotational movement and associated deformation while preserving the brake activation function
Solution Approach 2:
Instead of having the cable rotate and transmit motion, the patent inverts the approach by using a rigid rotational shaft that rotates to drive the mechanism. This reverses the traditional cable-driven approach and eliminates the deformation issue inherent in flexible cable rotation
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 maintains the initial installation state, prevents malfunctions, and reduces maintenance costs by ensuring the parking brake operates effectively without cable deformation, thereby enhancing safety and reducing post-management expenses.
Implementation Method 1
a driving member which is located on an outer side surface of one end of the lever by fixing one end of the driving shaft through a central portion and has a driving gear formed on the outer peripheral surface; rotational force transfer member of which one end is fixed to one end of a rotational shaft transfer shaft installed rotatably on the fixing bracket so as to be located below the driving shaft and which has a rotational force transfer gear formed on an outer peripheral surface so as to gear-engage with the driving gear of the driving member
Data Source
AI summary
The present invention relates to a double hinge type parking brake device which is constituted by a plurality of connection members having each gear formed on an outer peripheral surface while excluding a connection cable connecting a parking brake lever and a parking cable operating shaft for operating a parking cable to maintain an initial installation state instead of stretching the connection cable when the connection cable is used for a long time, thereby facilitating post management.