Detachable Luggage Wheel Assembly with Card and Pivot Lock

The problem

Standard luggage wheels are permanently attached to the bottom of the bag. When suitcases are packed into cartons for wholesale shipping or placed on retail shelves, the protruding wheels consume extra volume. That added bulk increases freight costs because fewer units fit into a standard container or pallet. During transit and warehouse handling, the hard plastic or rubber wheels press against the fabric or shell of adjacent bags, causing scuffs, friction marks, and surface damage. For consumers, replacing a broken wheel on a traditional suitcase often means taking the entire bag to a repair shop or discarding it, since the mounting hardware is riveted or bolted through the shell.

The solution

This utility model describes a wheel assembly designed to separate cleanly from the bag body.

1. The core mechanism relies on a card (100) and a pivot (200). The card slides in a straight line inside a slot (320) on the case and bag connecting seat (300), while the pivot moves linearly through a through hole (310) in the same seat.
2. The card features an irregularly shaped hole clipping (110). One end allows the pivot to insert, while the other end restricts the pivot’s movement once engaged.
3. The pivot contains a card slot space (210). A receiving part (120) extending from the card inserts directly into this space.
4. To secure the lock, an upper gear junction (121) on the receiving part coincides with the lower perspective plane of the card slot space. Simultaneously, the lower perspective plane of the receiving part coincides with the upper surface (211) of the card slot space. These mating surfaces prevent the pivot from shifting out of position.
5. An elastic restoring force acts between the card and the connecting seat, holding the assembly in the locked state during normal use.
6. A protective cover (500) is fastened to the connecting seat by screws. Underneath, a slider (510) on the cover inserts into a limit chute (130) on the card, guiding its travel path.
7. At the base, the pivot connects to the wheel carrier (400) using a pin (600) secured by screws, with an annular groove (220) at the pivot’s lower end accommodating the joint. An axle sleeve mold insert with an annular groove sits inside the through hole to support rotation.

Who it is for

• Luggage brands and manufacturers looking to offer flat-pack suitcases that reduce outbound freight volume and shipping costs.
• Amazon sellers and e-commerce wholesalers who ship large quantities of bags and need to maximize the number of units per carton or container.
• Retail buyers for department stores seeking luggage lines that take up less shelf and stockroom space before assembly.
• Replacement parts distributors who want to supply standalone wheel carriers that consumers can snap onto compatible connecting seats without tools.

How it works

The main parts

Operating steps

1. To detach the wheel: Apply force to slide the card along its slot against the elastic restoring force. As the card moves, the receiving part withdraws from the pivot’s card slot space, shifting the mechanism from the locked state, through the relative displacement state, into the disassembly state. The pivot is now free to move, allowing the wheel carrier to be pulled away from the connecting seat.
2. To attach the wheel: Insert the pivot into the through hole and align the wheel carrier. Release the card so the elastic restoring force pushes it back. The receiving part enters the card slot space until the upper gear junction and lower perspective plane coincide with the pivot’s surfaces, returning the assembly to the locked state.

Applications

Flat-pack e-commerce shipping

Online luggage sellers ship high volumes daily. Detaching the wheels allows each suitcase to pack flat, fitting more units into a single master carton and lowering dimensional weight charges from carriers.

Warehouse and retail storage

Stockrooms in department stores have limited floor space. Bags stored with detached wheels stack neatly on shelves without the wheels crushing the fabric of the cases below them.

Consumer wheel replacement

Travelers frequently break wheels on rough airport tarmac. With this design, a user can slide the card, remove the damaged wheel carrier, and snap on a new one without visiting a repair shop or using tools.

Multi-wheel configurations

Some heavy-duty bags use four or six wheels. Detachable assemblies let manufacturers ship the bag body and wheel sets in separate compartments, preventing the wheels from scratching the outer shell during ocean freight.

Where it is less suitable

• Ultra-lightweight softside bags - the connecting seat, card, and pivot add localized structure and weight that thin nylon shells may not support well.
• Integrated spinner chassis - bags molded as a single unibody shell with recessed wheels do not use a separate connecting seat.
• Heavy industrial transport cases - flight cases and road trunks rely on bolted casters rated for extreme loads rather than sliding card mechanisms.