Tyre Changer Layout for Compact Wheel Lifting and Bead Breaking
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Solution Overview
Problem
Existing tyre changing machines are cumbersome and ergonomically inconvenient due to protruding lifting arms and bead breaking mechanisms, which increase the machine's size and complicate wheel handling.
Innovation Solution
A compact tyre changing machine design with a bead breaking arm articulated to the frame, allowing the bead breaker tool to operate parallel to the floor, combined with a lifting device featuring a supporting platform that remains parallel to the floor, enabling easy wheel loading and reducing overall dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a lifting arm protrudes from the frame to lift wheels, then the wheel lifting function is achieved, but the machine dimensions increase and ergonomics deteriorate
Solution Approach 1:
The lifting arm is repositioned to extend in the longitudinal direction of the frame rather than protruding laterally, changing the spatial dimension of the lifting mechanism. This allows the wheel to be lifted along the longitudinal axis, reducing lateral machine dimensions while maintaining lifting functionality.
Solution Approach 2:
Instead of the lifting arm protruding outward from the frame to reach the wheel, the wheel is guided to approach the lifting arm from the front. This inversion of the interaction sequence allows the lifting arm to remain compact within the frame structure while still performing the lifting function.
2Ease of operation
If the bead breaking arm rotates in a plane parallel to the floor, then bead breaking is performed while the wheel is on the floor, but the machine complexity increases
Solution Approach 1:
The bead breaking arm is integrated with the lifting device, combining two separate functions (bead breaking and wheel lifting) into a single coordinated mechanism. This reduces overall machine complexity by eliminating redundant structural elements while maintaining both functionalities.
Solution Approach 2:
The lifting device is designed to serve multiple purposes: it lifts the wheel for positioning on the rotatable support and also supports the bead breaking operation. This multi-functionality reduces the need for separate dedicated structures for each function.
Data Source
Figure 1
Figure 2A~2B
Figure 3A
AI summary
A tyre changing machine (100) comprises: a wheel-holder unit (200); a frame (400); a bead breaker unit (300) including a bead breaking arm (301) articulated to the frame (400) to rotate about a vertical axis (Y), a bead breaker tool (302) and a bead breaker actuator (303) to move the bead breaker tool (302) towards and away from a wheel (R); a lifting device (500), including a lifting arm (501) and a supporting platform (502), defining a horizontal surface on which to rest the wheel (R) and connected to the lifting arm (501) to be movable between a lowered position and a raised position. The lifting device (500) also comprises a lifting actuator to move the supporting platform (502) between the raised position and the lowered position, and a box-shaped body (600) that is operatively coupled to the flank (400b) of the frame (400); the lifting actuator is at least partly positioned in the box-shaped body.