Cam-Actuated Barbell Clamp for Low-Force Secure Locking
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Solution Overview
Problem
Existing clamping devices for securing weights on exercise equipment, such as barbell clamps, often require excessive user force and may damage the equipment due to inadequate clamping force, and they lack efficient mechanisms for secure engagement and easy removal.
Innovation Solution
A clamping device with a cylindrical primary member, a clamping member, and an actuator mechanism that pivots between unlocked and locked positions, using an eccentric connection to securely engage and disengage the clamping member around a mounting member, allowing for reliable and low-force operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If existing clamping devices are used to secure weights, then the weights can be held in place, but excessive user force is required and the equipment may be damaged
Solution Approach 1:
The clamping device uses a dynamic cam mechanism that transforms a small rotational force applied by the user into a large clamping force. The cam profile is designed to provide mechanical advantage, allowing the user to securely engage the clamp with minimal effort while preventing equipment damage through controlled force application.
Solution Approach 2:
The invention replaces traditional threaded or lever-based clamping mechanisms with a cam-based system. This substitution allows for more efficient force multiplication and provides a positive locking action that ensures secure engagement without requiring excessive user force or complex adjustment mechanisms.
2Ease of operation
If traditional clamping mechanisms are used, then engagement can be achieved, but the mechanism is complex and difficult to operate
Solution Approach 1:
The clamping device is divided into distinct functional segments: the cam actuator for engagement, the clamping member for securing, and the release mechanism. This segmentation allows each component to perform its specific function efficiently, simplifying the overall operation while maintaining secure engagement capabilities.
Solution Approach 2:
The cam mechanism is designed so that the natural direction of cam rotation during engagement automatically produces the clamping action. The geometry of the cam profile ensures that as the user rotates the cam handle, the follower is pushed against the clamping member, creating secure engagement without requiring additional actuators or complex control systems.
3Force
If insufficient clamping force is applied, then the device is easier to operate, but the mounting member may become loose and damage equipment
Solution Approach 1:
The cam mechanism incorporates a controlled force progression that gradually increases clamping force during engagement. The cam profile is designed to provide initial gentle contact that progressively increases to the required clamping force, preventing sudden impacts or excessive forces that could damage the equipment while ensuring secure mounting.
Solution Approach 2:
The clamping device uses a sacrificial friction interface between the clamping member and mounting member that provides consistent holding force. The design accepts that some wear will occur at the contact surfaces but ensures this wear does not compromise the structural integrity of the equipment, allowing for reliable operation over the service life of the clamp.
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 device provides secure engagement with reduced user exertion force and improved durability by using a 360° contact surface, ensuring effective resistance to axial loads while being easy to install and remove.
Implementation Method 1
The actuator mechanism includes an actuator pivotably connected to the primary member at a pivot connection, the actuator further having an eccentric connection spaced from the pivot connection, and a pivot arm pivotably connected to the actuator at the eccentric connection
Implementation Method 2
When moving the actuator mechanism from the unlocked position to the locked position by pivoting the actuator, the pivot arm travels ahead of the eccentric connection in a first direction of travel of the eccentric connection, and/or the pivot arm travels toward the second end of the clamping member to push the second end of the clamping member toward the first end
Data Source
AI summary
A clamping device includes a primary member with a central passage and a clamping member connected to the primary member. The clamping member includes an annular body that extends around the central passage between first and second ends. The device also includes an actuator mechanism with an actuator connected to the primary member at a pivot connection, and a pivot arm pivotably connected to the actuator at an eccentric connection spaced from the pivot connection. The actuator pivots between an unlocked position and a locked position, where the pivot arm engages the second end of the clamping member to move the first and second ends closer together. When moving the actuator mechanism from the unlocked to the locked position, the pivot arm travels ahead of the eccentric connection and/or toward the second end of the clamping member. Moving the actuator mechanism from the locked to the unlocked position causes the opposite movement.