What is the technical name for the push-on type of wheels that are found on some bicycle trailers?

Question

The trailer wheels have their own axle that stays in place via a spring-loaded ball bearing.

(They are quite different from the various axles usually found on bicycles themselves; those have some kind of bolt or clamp at both ends and go into dropouts.)
They’re described in
wikipedia

Most trailers have a separate axle for each wheel, like those used on
a bicycle. These separate axles usually mount directly on the frame
using either threaded nuts, a quick-release mechanism, or some press
fit arrangement.

and in
this question

...a single sided wheelchair hub. They are light and designed so the
wheels are easily removable, which is handy for a trailer that will be
packed away often.

but is there an accepted name or term?

Kevin Saldanha · Answer

"Quick Release push button Axle"

The Mogo The Jac Wheelchair  uses this axle fitment, and the axle is described as:

Round Betty Rear wheels with hard anodised hand rings, quick release push button axle (and) 20" to 27" double walled alloy (rims)

Additionally Mogo Shadow Wheelchair suggests their chair has

Wheelchair tyres:   quick release axles

This one shows a pushbutton axle, with the release on the outside of the hub.  The short (approx 80mm) shaft will fit inside a tube on each side of the frame, and will click a bearing ball into a groove on the inside for retention.
It is also possible to have the release mechanism on the frame instead of in the hub.  This is not uncommon on trailers where the outside of the hub may take an impact and detach. However the release underneath are more inconvenient.
Note the axle does not rotate with respect to the chair's frame.  All the rotation is done by bearings, probably in standard cartridges inside the wheel's hub.  Its also possible that older wheels may have loose/caged bearings with a cup-and-cone style of race, or particularly high-load wheels may have needle bearings for increased load capacity.

Martin F · Answer

Other terms i've seen used, on this very website, in addition to the accepted answer, are

stub axle
one-sided axle
tadpole trike hub

From wikipedia.org/wiki/Bicycle_trailer

Some trailers support a normal axle on two sides, others mount the wheel off one side with a stub axle (a one sided axle).

RoboKaren · Answer

As various people have noted, wheelchair hub is the correct term for these one-sided, push-button release hubs.

It goes without saying that this type of mechanism is now being widely used in cycle trailers and recumbent trikes, but we still call them wheelchair hubs even though "real" wheelchair hubs have much shorter axles than are commonly found on trailers and recumbents (see image above).

What is the technical name for the push-on type of wheels that are found on some bicycle trailers?

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