12
Scania Truck Bodybuilder 22:10-731 Issue 1 2017-05-02 © Scania CV AB 2017, Sweden 1 (12) General information Concrete pump trucks General information Concrete pump trucks are used to pump concrete via a hydraulically controlled arm, usually to places at a distance from the vehicle. The bodywork is regarded as being extra torsionally rigid. The instructions in this document were developed to optimise the vehicle with regard to the following factors: Lowest possible sensitivity to frame oscillations that cause discomfort Load sharing Selection of attachment type and the location of attachments The instructions assume that the bodywork is designed as an extra torsionally rigid unit. Information on troubleshooting and the elimination of frame oscillations that cause discomfort is found in the document Discomfort caused by vibrations. 388 961 More information is found in the following documents: Selecting the subframe and attachment Subframe design Discomfort caused by vibrations Axle weight calculations Cranes Roll stability

Concrete pump trucks - Scania Group

  • Upload
    others

  • View
    10

  • Download
    0

Embed Size (px)

Citation preview

Page 1: Concrete pump trucks - Scania Group

Concrete pump trucks

General information

388 9

61

More information is found in the following documents:

• Selecting the subframe and attachment• Subframe design• Discomfort caused by vibrations• Axle weight calculations• Cranes• Roll stability

General informationConcrete pump trucks are used to pump concrete via a hydraulically controlled arm, usually to places at a distance from the vehicle.

The bodywork is regarded as being extra torsionally rigid.

The instructions in this document were developed to optimise the vehicle with regard to the following factors:

• Lowest possible sensitivity to frame oscillations that cause discomfort

• Load sharing

• Selection of attachment type and the location of attachments

The instructions assume that the bodywork is designed as an extra torsionally rigid unit.

Information on troubleshooting and the elimination of frame oscillations that cause discomfort is found in the document Discomfort caused by vibrations.

Scania Truck Bodybuilder 22:10-731 Issue 1 2017-05-02© Scania CV AB 2017, Sweden 1 (12)

Page 2: Concrete pump trucks - Scania Group

General information

Concrete pump trucks

Preparing the vehicle with options from the factoryOrder finished solutions and preparations from the factory. Retrofitting will lead to higher costs.

For example, there are finished solutions for power take-offs and electrical prepara-tions for power take-offs that can be ordered from the factory.

More information on finished solutions and preparations available from the factory is found on the Scania Truck Bodybuilder website.

More information on possible power take-offs from the factory is found in the docu-ment Selecting a power take-off.

More information on Scania’s power take-offs is found in the document for the re-spective power take-off:

• Example of a search term: EG651P.

• Examples of filters:

– Type of work: Selection of power take-off and hydraulic equipment.– Type of product: EG power take-off.

More information on the options for hydraulic equipment is found in the document Components for hydraulic equipment.

Scania Truck Bodybuilder 22:10-731 Issue 1 2017-05-02© Scania CV AB 2017, Sweden 2 (12)

Page 3: Concrete pump trucks - Scania Group

Designing the bodywork

Concrete pump trucks

Designing the bodyworkMake the bodywork so strong and rigid that it alone can manage the loads during pumping work. When the vehicle is set up for pump work, the vehicle primarily func-tions as counterweight.

Note:Concrete pump trucks are usually heavy. Make sure the axle weight for all axles fol-low the legal requirements.

The bodywork centre of gravity should be as low as possible to reduce the rolling mo-ment.

Concrete pump trucks must be constructed with a subframe to ensure the following:

• Even distribution of the load.

• Dampening of frame oscillations that cause discomfort

• Greater possibility of correct location of the foremost attachments according to Scania’s recommendations

Contact a Scania dealer for more information about the vehicle’s construction.

Scania Truck Bodybuilder 22:10-731 Issue 1 2017-05-02© Scania CV AB 2017, Sweden 3 (12)

Page 4: Concrete pump trucks - Scania Group

Designing the bodywork

Concrete pump trucks

388 9

59

The subframe must have as great a contact area as possible to the frame side mem-bers.

≤ 600

383 0

49

Designing the subframeThe subframe moves in relation to the chassis frame due to torsional movements that occur when the vehicle is in motion. The movement is dampened by the friction that occurs between the subframe and chassis frame. For the friction to be as great as pos-sible, the subframe must follow the shape of the chassis frame and have as great a contact area as possible to the frame side members, see illustration.

Subframe locationThe subframe must be pulled forward and attached to the chassis frame as close to the foremost front axle as possible. This decreases the load on the chassis frame and reduces the risk of frame oscillations that cause discomfort.

Maximum permitted distance between the centre of the foremost front axle and the front edge of the subframe is 600 mm, see illustration.

Scania Truck Bodybuilder 22:10-731 Issue 1 2017-05-02© Scania CV AB 2017, Sweden 4 (12)

Page 5: Concrete pump trucks - Scania Group

Designing the bodywork

Concrete pump trucks

383 6

03

Torsional forces that can generate torsional movements in the chassis frame when the vehicle is in motion.

Selection and location of attachmentsIMPORTANT!

Design the attachments and fit the body adaptation brackets so that the vertical forces from the bodywork do not cause high torsional forces in the frame side members. High torsional forces in the frame side members can cause damage to the chassis frame.

Minimise the transfer of torsional movements from the chassis frame to the subframeWhen the vehicle is in motion, torsional forces arise which can generate torsional movements in the chassis frame, see illustration. Transfer of torsional movement from the chassis frame to the bodywork must be minimised to counteract high tor-sional forces in the bodywork and its attachments.

Scania Truck Bodybuilder 22:10-731 Issue 1 2017-05-02© Scania CV AB 2017, Sweden 5 (12)

Page 6: Concrete pump trucks - Scania Group

Designing the bodywork

Concrete pump trucks

IMPORTANT!

• Minimise the transfer of torsional movement from the chassis frame by using flexible attachments between the subframe and chassis frame in the front section of the vehicle.

• Follow Scania’s guidelines for the location and selection of attachment type and body adaptation brackets.

More information on body adaptation brackets, their location and selection of at-tachment type is found in the following documents:

• Bodywork attachment

• Selecting the subframe and attachment

More information on body adaptation brackets and the location of holes is found in the vehicle’s ICD (Individual Chassis Drawing).

Information on weighing cells and attachments is found in the document Weighing equipment.

Scania Truck Bodybuilder 22:10-731 Issue 1 2017-05-02© Scania CV AB 2017, Sweden 6 (12)

Page 7: Concrete pump trucks - Scania Group

Designing the bodywork

Concrete pump trucks

A B CD 38

8 962

Attachments in the front section of the vehicle (A)Fit the subframe using flexible attachments that allow the following movements in relation to the chassis frame:

• Longitudinal displacement

• Certain upward movement

The size of the movements depends on the driving conditions.

The attachments must control the sideways movement of the subframe.

Scania Truck Bodybuilder 22:10-731 Issue 1 2017-05-02© Scania CV AB 2017, Sweden 7 (12)

Page 8: Concrete pump trucks - Scania Group

Designing the bodywork

Concrete pump trucks

≤ 725

383 0

50

Location of the foremost attachmentTo counteract any frame oscillations, the foremost bodywork attachment point must be as close to the foremost front axle as possible.

Maximum permitted distance between the centre of the foremost front axle and fore-most attachment screw in the subframe is 725 mm, see illustration.

Scania Truck Bodybuilder 22:10-731 Issue 1 2017-05-02© Scania CV AB 2017, Sweden 8 (12)

Page 9: Concrete pump trucks - Scania Group

Designing the bodywork

Concrete pump trucks

A B CD 38

8 962

Attachments in the rear section (B) and rear end (C) of the vehi-cleFit the subframe with rigid attachments so that they give the necessary rigidity be-tween the subframe and chassis frame.

The attachments must control the sideways movement of the subframe.

Attachments at the transition between the vehicle’s front section and rear section (D).Different driving conditions require different limitations in mobility between the chassis frame and the subframe. Increase or decrease the mobility between the sub-frame and chassis frame by adapting and redistributing the attachments in the transi-tion between the vehicle’s front section and rear section (D). More flexible attachments located further back give increased mobility and more rigid attachments located further forward give reduced mobility.

Scania Truck Bodybuilder 22:10-731 Issue 1 2017-05-02© Scania CV AB 2017, Sweden 9 (12)

Page 10: Concrete pump trucks - Scania Group

Designing the bodywork

Concrete pump trucks

Roll stabilityThe rigidity of the vehicle affects the static resistance to overturning. High rigidity gives a better resistance to rolling over sideways.

IMPORTANT!

The bodybuilder is responsible for carrying out a stability test and to issue a certifi-cate.

Stability while working depends on the following factors:

• The design of the bodywork

• The concrete pump arm’s load and centre of gravity

• Concrete pump arm position

• The design of the supporting legs

• The chassis’ weight and specification

• The ground surface

For best stability, the supporting legs must be extended as far out as possible.

More information on roll stability is found in the document Roll stability.

Scania Truck Bodybuilder 22:10-731 Issue 1 2017-05-02© Scania CV AB 2017, Sweden 10 (12)

Page 11: Concrete pump trucks - Scania Group

Designing the bodywork

Concrete pump trucks

2

3

1

388 9

64

1. Toppling line.2. Objects whose weight increases the stabilising moment.3. Objects whose weight increases the toppling moment.

Stability factorsThe following principles are fundamental regarding stability for stationary trucks:

• Stabilising moment (Ts): Any weight acting on the vehicle side of the toppling line (1) increases the stabilising moment.

• Toppling moment (Tt): Any weight acting beyond the vehicle’s side of the top-pling line increases the toppling moment.

• Stability factor (n) is the quotient of the stabilising moment divided by the top-pling moment. Good stability is achieved when the stability factor is 1.4 or higher.

Note:A calculation must always be verified by a stability test.

Ts= n

Tt

Scania Truck Bodybuilder 22:10-731 Issue 1 2017-05-02© Scania CV AB 2017, Sweden 11 (12)

Page 12: Concrete pump trucks - Scania Group

Designing the bodywork

Concrete pump trucks

388 9

63

Distance between bodywork and cab roofIf the bodywork protrudes over the cab roof, the bodywork’s design must allow the cab to be completely tilted.

More information on the cab tilt curve dimensions is found in the document for the respective cab type. Example of a search term: Cab tilt curves.

Scania Truck Bodybuilder 22:10-731 Issue 1 2017-05-02© Scania CV AB 2017, Sweden 12 (12)