What happens if the 0.4 mm tube clearance of a Medical testing device shockproof trolley case grows?

Torsional vibration reaches the floor first and the 5-200 Hz sweep peak can pass 3.2 g. Recheck tube fit, then confirm the wheel-seat inserts still hold 2.6 N.m.

How do 48 kg/m3 density and 40 mm thickness work together?

Density sets stiffness, thickness sets travel. Layered at 48 kg/m3 over 40 mm, the pad shares sweep energy across two stages; too thin bottoms out low, too dense passes acceleration to the floor.

Why retest liner displacement within 0.9 mm separately after a 1.0 m drop on a Medical testing device shockproof trolley case?

A clean sweep only bounds steady energy. A drop is transient and can shift a pocket locally; past 0.9 mm the frame-to-pocket fit needs re-shimming.

Are two latches at 360 N each enough to hold the seal?

It depends on joint length. Two latches split preload between the ends while the inner frame backs the middle; after 3600 cycles, remeasure compression and keep decay inside a tenth.

How is wheel-seat looseness judged after 3600 cycles?

Retorque to 2.6 N.m, then measure play at the four inserts; any point past 0.4 mm is rejected, and a repeat 5-200 Hz sweep must still stay within 3.2 g.

Medical testing device shockproof trolley case

Quick answer: Medical testing device shockproof trolley case is checked at 12 kg, 5-200 Hz sweep, 3.2 g transmission and 0.9 mm liner shift after a 1.0 m drop.

Tube clearance in a Medical testing device shockproof trolley case
Wheel-seat inserts and base stiffness
Transmitted acceleration across the sweep band
Liner displacement after drop retest
Wheel-seat looseness after cycle life
FAQ

1. Tube clearance in a Medical testing device shockproof trolley case

A Medical testing device shockproof trolley case measures 560 x 400 x 230 mm outside and 495 x 340 x 165 mm inside, with a 3.9 mm wall, 5.2 kg empty and a 12 kg rated load. The two-section handle tube runs at 0.4 mm clearance, which sets both pull feel and how much torsional vibration reaches the base.

Open that clearance past 0.4 mm and the tube rocks against the base during a sweep; torsional energy lands on the tube seat first and spreads across the floor. Close it too far and pull force rises with a risk of cold binding. A Medical testing device shockproof trolley case is accepted at 0.4 mm, gauged at three points on each section.

Tube positions are listed separately because base stiffness is not one figure. Upper tube, lower tube, four wheel-seat inserts and the floor locating sleeve share a single load path; an out-of-tolerance gap anywhere lifts the 5-200 Hz transmission reading.

Tube position	Fit clearance	Recheck item
Upper tube	0.4 mm	Vibration transfer
Lower tube	0.4 mm	Vibration transfer
Four wheel-seat inserts	0.4 mm	Torque 2.6 N.m
Floor locating sleeve	0.4 mm	Pad compression

The 0.4 mm figure is an assembly tolerance, not a wear allowance. The tube seat and inserts hold it after release.

2. Wheel-seat inserts and base stiffness

Four wheel-seat inserts in a Medical testing device shockproof trolley case are torqued to 2.6 N.m, spreading wheel and handle point loads across the broad floor. A drilled-in insert leaves a leak path at the hole; a moulded-in one must stay sealed and must not thin the 3.9 mm floor.

Medical testing device shockproof trolley case red open case on steel table, raised cross, hinged black trays, twin catches, round valve and side wheels

Two latches at 360 N each close the front, and preload passes through the inner frame onto the gasket. A soft base lets the frame shift against the mouth, opening a mid-span gap and enlarging the liner displacement seen after a drop.

A Medical testing device shockproof trolley case logs insert torque and pad density on one inspection sheet, because either alone cannot judge base stiffness.

The base load order is worth writing down. Torsional vibration from the handle reaches the tube seat first. The seat splits it into the floor ribs. The ribs carry it into the four wheel-seat inserts. If torque there decays from 2.6 N.m, the foam pad takes the point load directly. An EVA pad at 48 kg/m3 absorbs what remains in layers, and 40 mm of thickness gives it travel. Base stiffness, insert torque and pad density are therefore three links of one chain, logged separately instead of reduced to a single acceleration peak.

3. Transmitted acceleration across the sweep band

A Medical testing device shockproof trolley case is swept from 5-200 Hz at 12 kg, and transmitted acceleration must stay within 3.2 g. The reading is the amplification of a floor point against the table, set by pad travel at low frequency and by base stiffness and insert contact high up.

A Medical testing device shockproof trolley case records the band in steps: 5-30 Hz shows whether the pad bottoms out, 80-150 Hz whether an insert has loosened, 150-200 Hz whether the inner frame resonates locally. One peak alone hides the worst step.

Sweep step	Transmitted acceleration	Verdict
5-30 Hz	1.8 g	Pass
30-80 Hz	2.6 g	Pass
80-150 Hz	3.2 g	<= 3.2 g
150-200 Hz	2.4 g	Pass

The EVA pad is layered at 48 kg/m3 with 40 mm total thickness, leaving low-frequency travel; too dense passes acceleration straight to the floor, too soft bottoms out in the 5-30 Hz step.

4. Liner displacement after drop retest

A Medical testing device shockproof trolley case is retested with a 1.0 m six-face drop, and liner displacement must stay within 0.9 mm. A clean sweep only proves steady energy is contained; a drop is transient and can shift a pocket against the frame once.

Medical testing device shockproof trolley case burgundy open case on white table, ribbed lid, cross mark, divided trays, twin catches and black gasket

Displacement for a Medical testing device shockproof trolley case is the pocket-to-frame offset read at four corners after impact, with the largest value kept. Above 0.9 mm, check frame height and pad rebound before blaming the liner.

Acceleration reading	Gauge point	Verdict
1.8 g	Floor centre	Pass
2.6 g	Wheel-seat insert	Pass
3.2 g	Inner frame	<= 3.2 g
2.4 g	Tube end	Pass

5. Wheel-seat looseness after cycle life

A Medical testing device shockproof trolley case runs 3600 open-close cycles, retorquing the wheel-seat inserts every 900 cycles; torque below 2.6 N.m counts as loose, and 360 N latch preload may decay by no more than a tenth.

The reject line for a Medical testing device shockproof trolley case also rechecks the 495 x 340 x 165 mm cavity, since a loose insert lets the floor sag and tilts the frame. JUNZHIJIA records cycle count, retorque value and displacement in one report for lot tracing.

Conclusion

Retesting a Medical testing device shockproof trolley case follows five steps: tube clearance, base stiffness, sweep readings, drop displacement and wheel-seat looseness. The 0.4 mm gap, 2.6 N.m torque, 48 kg/m3 pad and 40 mm thickness each bound one part of the load path, and 3.2 g transmission with 0.9 mm liner shift are two separate gates. Ask for load mass and fastening torque before comparing figures.