Support / Technical Bulletins / Technical Bulletins / 2024 / TB UK246 - Excessive Frame Flex

TB UK246 - Excessive Frame Flex

26/01/2024

We have received a small number of complaints regarding excessive flex in the frame of the QS5 X, which in those cases has led to the drive wheel catching on the armrest or sideguard. 

The pictures below show before and after propulsion, showing the reduction in space between the wheel and sideguard that is common with this issue.

Gap after Frame Flex

Standard Gap

 

INVESTIGATION & ROOT CAUSE

The reason for the issue was two-fold:

 

  1. The frame design and construction of the QS5 X is 10mm more compact than the QUICKIE Life F, which reduces the overall clearance between the wheel and sideguard/armrest.
     
  2. The flex in the frame on serial production units was not matching pre-production tests of the product. This extra flex was causing too much movement in the axle receiver, which allowed the wheel to flex at a greater level and come into contact with the sideguard/armrest.

 

CORRECTIVE ACTION

Since 17th November 2023, all chairs manufactured with either a desk sideguard or single post armrest have been fitted with additional spacers between the frame and the axle stem to increase the distance between the wheel and the sideguard/armrest.

Example overleaf:

 

 

 

For chairs manufactured before the 17th November 2023, you can purchase spacer repair kits as a spare parts, listed below:

 

Description

Part Number

QS5 X Spacer Repair Kit – No Camber

 

71207111

QS5 X Spacer Repair Kit – 2 ° Camber

 

71207112

 

Since 28th November 2023, all chairs manufactured have had additional washer kits fitted between the locking nut and axle sleeve, the torque of the nut has also been increased from 25nm to 35nm.

For chairs manufactured before the 28th November 2023, you can purchase washer repair kits as a spare parts, listed below:

Corrective Action in the Field – Issue 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

For chairs manufactured before the 28th November 2023, you can purchase washer repair kits as a spare parts, listed below:

 

Description

Part Number

QS5 X Washer Repair Kit 

 

000851071-ET

 

Please contact your area sales manager for more information