Tire Dismounting Machine With Swiveling Hook to Limit Rim Friction
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Solution Overview
Problem
Existing dismounting machines require manual force and risk injury, and motor-driven hooks cause significant friction and stretching, potentially damaging the tire and rim.
Innovation Solution
A dismounting machine with a motor-driven hook mechanism on a swiveling auxiliary arm that moves independently of a fixed guide head, limiting force interaction during tire rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a motor-driven hook is used to grip and move the tire inner edge over the rim, then the dismounting process is automated and requires less manual force, but the hook continuously exerts considerable force on the inner edge during rim rotation, causing friction and stretching that may reduce tire strength and integrity
Solution Approach 1:
The patent applies the dynamics principle by making the auxiliary arm with the hook swiveling and movable, allowing it to independently follow the circular path of the tire inner edge during rim rotation. This dynamic adjustment enables the hook to maintain contact without exerting continuous considerable force, as it moves with the tire rather than forcing it along a fixed path.
Solution Approach 2:
The patent segments the dismounting tool into two independent arms: a fixed guide arm with a guide head that maintains a stable working position, and a movable auxiliary arm with a hook that independently follows the tire's circular path. This segmentation allows each component to perform its specific function optimally - the guide arm provides stable guidance while the auxiliary arm minimizes damage through its independent motion.
2Productivity
If a fixed guide head maintains a constant working position during rim rotation, then the dismounting process is efficient and controlled, but it requires the hook to continuously exert force to keep the tire inner edge in contact with the guide head
Solution Approach 1:
The auxiliary arm is designed to swivel and move independently, dynamically adjusting its position to follow the circular path of the tire inner edge during rim rotation. This eliminates the need for continuous considerable force, as the hook naturally follows the tire's motion while maintaining contact.
Solution Approach 2:
The swiveling auxiliary arm acts as an intermediary between the fixed guide head and the rotating tire. It transfers the motion from the rotating rim to the hook in a way that minimizes force requirements, allowing the hook to follow the tire's circular path without exerting excessive force.
Data Source
AI summary
Provided is dismounting machine for dismounting a tire from a rim, including a supporting base frame that is provided with a vertical carrying body for a rim, wherein said carrying body is connected to the base frame, is rotatable by a motor relative to the base frame about a rotation axis that extends in a vertical direction, and is provided with fastening means for fastening a rim in a fixed position on an upper side of the carrying body, so that a principal axis of the rim thus fixed extends in a direction that coincides with the central rotation axis of the carrying body, so that rotation of the carrying body leads to rotation of the fixed rim about the principal axis, and a vertical column connected rigidly to the base frame, which is located at a distance from the carrying body, said column being provided with a guide arm and an auxiliary arm, which extend from the column in the direction of the carrying body, and which, movable independently of one another, are connected to the column, so that the guide arm and the auxiliary arm can be placed independently of one another in a working position as separate tools for dismounting a tire from a rim fixed on the carrying body.