Expandable Dowel Wheel Marking Device
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Solution Overview
Problem
Existing wheel marking devices are difficult to handle, especially when wearing gloves, and are prone to breakage due to their design.
Innovation Solution
The device incorporates an expandable dowel member with a pre-assembled spreader member that expands upon insertion, ensuring secure seating in the wheel rim and facilitating easy handling, with optional electronic identification using RFID for additional information storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the device uses legs projecting outwardly at an angle to clamp through the wheel bolt receiving opening, then the device can be received in a clamping manner through the opening, but it is difficult to press the legs together during insertion especially when wearing gloves
Solution Approach 1:
The device is divided into two separate functional parts: a dowel member that provides the marking function and an expansion member that provides the clamping function. This segmentation allows each part to be optimized independently - the dowel member can be simply inserted while the expansion member expands inside to provide clamping, eliminating the need to manually compress multiple legs during insertion.
Solution Approach 2:
The expansion member is inserted into the dowel member in a nested configuration. The expansion member features an expansion ring that engages with expansion sections on the dowel member. When the expansion member is pushed further into the dowel member, the expansion ring causes the dowel member to expand outwardly against the inner surface of the wheel rim, providing secure clamping without requiring manual compression of external legs.
2Reliability
If the device uses legs projecting outwardly for clamping, then the device can be received through the opening, but the legs break easily if handled carelessly
Solution Approach 1:
The expansion member is inserted into the dowel member in a nested configuration. The expansion member features an expansion ring that engages with expansion sections on the dowel member. When the expansion member is pushed further into the dowel member, the expansion ring causes the dowel member to expand outwardly against the inner surface of the wheel rim, providing secure clamping without requiring manual compression of external legs.
Solution Approach 2:
The device transitions from a static leg structure to a dynamic expansion structure. The dowel member remains relatively simple and robust during insertion, then dynamically expands when the expansion member is inserted to the appropriate depth. This dynamic expansion provides the clamping force needed for reliable retention while maintaining structural integrity during handling.
3Reliability
If the dowel member expands to prevent removal, then the device becomes securely seated in the rim opening, but the insertion process becomes more complex
Solution Approach 1:
The expansion mechanism is pre-assembled within the dowel member before insertion. The expansion member is already positioned inside the dowel member, and the expansion ring is pre-configured to engage with the expansion sections. During insertion, no additional assembly or complex manipulation is needed - the device is simply inserted and then pushed to trigger the pre-configured expansion mechanism, which then automatically secures the device in place.
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a device (1) for marking wheels of a motor vehicle, wherein the rim of a wheel has at least one opening for receiving a wheel bolt, wherein the device (1) for marking can be inserted into the opening, wherein the device (1) comprises an expandable dowel element (2), wherein the expandable dowel element (2) slidably receives an expanding element (20) for expanding the dowel element (2), wherein the expanding element (20) and/or the dowel element (2) has a marking.