background image

9

0.0.684.91

0.0.684.91

3.1 Explanation of operating data and example configuration

4. Commissioning and operation

Refer to DIN 15172 when calculating the trailer load of industrial truck tugger trains. VDI 3973 builds on this DIN standard to offer practical calculations for maxi-

mum trailer load under operating conditions and set out parameters that need to be factored in when determining the maximum length of tugger trains. If there are 

any uncertainties regarding the conditions of the routes to be used or likely peak loads, test runs should be carried out and documented in line with VDI 3973 and 

DIN 15172.
During these tests, the company must identify the permissible trailer loads and tractor unit/trailer combinations for the relevant deployment site and scenario and 

make drivers aware of these in appropriate user manuals.
Before setting off, the driver must ensure the trailers are properly coupled. The manufacturer’s safety precautions and user guide must be observed.
A distinction is made between the maximum trailer load during traction and during braking as appropriate to the characteristics of the tractor unit and local 

conditions.
The trailer load for traction and braking operations that is calculated in this way is equal to the sum total of all the loads in the train and also acts on the first 

Drawbar. 

Besides calculating the potential trailer load for the tractor unit, users must also analyse the Drawbar Coupling solution.
Example: 

m = F / a = 3000 N / 2.5 m/s

2

 = 1200 kg = 1.2 t

m: Maximum trailer load of the Drawbar / Drawbar Coupling combination 

F:  Maximum tensile load of the Drawbar D25-610 (0.0.674.29) and Drawbar Coupling D25-30 (0.0.674.28) combination 

a:  Actual, genuine braking deceleration / acceleration (determined through experimentation or as per DIN 15172/VDI 3973)
This tugger train is permitted to pull a maximum of 1.2 t regardless of the tractor unit’s maximum tensile load!

• Check the Drawbar for visible damage prior to installation.
•  Drawbar D25-686, Self-Lifting should preferably be fitted to standard Profiles 8 80x40 that have been installed in an upright orientation. It should be 

fastened with 4 DIN 912 M8, 10.9 screws and 4 T-Slot Nuts 8 M8 (Fastening Set 8 6-8, 0.0.684.91, see picture). 

Tightening torque: 25 Nm  

Factor the groove load-bearing capacity of the profiles into your calculations for total load (item24.de/en).

•  If fastening Drawbar D25-610 to a Profile 8 40x40, use 2 M8, 10.9 screws and 2 T-Slot Nuts 8 M8 (Fastening Set 8 6-8, 0.0.684.91, see picture). 

Tightening torque: 25 Nm 

When calculating maximum load, factor in the maximum load-carrying capacity of the fasteners and profiles (item24.de/en).

•  Please note that an eccentric fixing will increase load (torque is generated because the point where traction takes effect and the fixing are not on one 

level).

•  To avoid creating a weakness that could result in breakage during an emergency braking manoeuvre, do not subject the Drawbar to excessive bending 

loads during start-up and operation, e.g. by standing on it.

Содержание Drawbar D Series

Страница 1: ...User guide Drawbar D25 686 Self Lifting Drawbar D25 610...

Страница 2: ...4 Warning symbols 4 1 5 CE declaration 5 2 Product description use and accessories 6 2 1 Drawbar D25 686 Self Lifting 6 2 2 Drawbar D25 610 7 3 Operating data 8 3 1 Explanation of operating data and e...

Страница 3: ...Do not alter the position of safety equipment circumvent it or render it ineffective The Drawbar described here corresponds to the state of the art and takes into account the general principles of sa...

Страница 4: ...ions to the Drawbar shall result in an exclusion of liability on the part of item GmbH and must be added and factored into new documentation The Drawbar is intended for use only in applications involv...

Страница 5: ...5 1 5 CE declaration...

Страница 6: ...o offers added protection for the operator s feet When the spring pulls the Drawbar upright the elastic Impact Buffer M8 D30x30 brings the Drawbar to a stop before it hits the fastening plate Due to t...

Страница 7: ...spring pushes the Drawbar up which means users can couple and uncouple trolleys using their feet and without having to bend over If the Drawbar is not needed it folds up automatically so that it doesn...

Страница 8: ...ecialist item representative Avoid long periods of contact with highly acidic or alkaline substances Consult the manufacturer if using in very salty air The Drawbars are fundamentally suitable for use...

Страница 9: ...t users must also analyse the Drawbar Coupling solution Example m F a 3000 N 2 5 m s2 1200 kg 1 2 t m Maximum trailer load of the Drawbar Drawbar Coupling combination F Maximum tensile load of the Dra...

Страница 10: ...rame of the trolley in the event of a collision Incorrect commissioning and operation can result in malfunctions that can adversely affect service life and pose a risk to personnel If the Drawbar is r...

Страница 11: ...ts that are found to be damaged must be replaced immediately The Drawbar is fundamentally a maintenance free part All products are subject to a natural process of wear and tear that varies according t...

Страница 12: ...continuous product development ensures that products from item Industrietechnik GmbH always exhibit a high standard of innovation Conse quently there could be inconsistencies between these operating i...

Отзывы: