Aerial Work Platform scissor lift Capability presentation

aerial work platform

Application technology

 

1 Electrification trend in mobile machinery

Change from Internal Combustion Engine (ICE) to Battery Electrical Vehicle (BEV )

  1. Push by regulation : global and local
  • Sustainable energy
  • Lower CO2 emission
  1. Work in the city and indoor
  • Lower noise level
  • Less CO2 emission
  1. Maintain the power density and durability
  • Minimum of compromise

electrification

2 Aerial Work Platform

Aerial Work Platforms (AWPs), now called Mobile Elevating Work Platforms (MEWPs) are mechanical devices used to provide temporary access for people or equipment to inaccessible areas, usually at height.

A scissor lift is a type of platform that can usually only move vertically. The mechanism to achieve this is the use of linked, folding supports in a crisscross “X” pattern, known as a pantograph (or scissor mechanism).

It is used indoor and outdoor on flat surface. Most of them are electrified

aerial work platforms

3 Current technology for work functions

Depending the AWP, technologies used are:

  • an electro hydraulic system with electro gear pump, tank, control valve, hose and cylinder OR
  • an Electro-hydraulic Actuator that is a cylinder with a stand-alone hydraulic system powered by electrical wire and controlled by a switch for extend and retract motions

Both solutions have a relieve valve to avoid over load and that provides a lowering solution with oil returning to the tank

A diaper on the base is typically provided to absorb possible oil leakages

Current technology

Customer case

1 Main Customer needs

Main Customer needs

2 No oil leakages

Multiple hydraulic circuit points can leak: hydraulic cylinders request multiple hoses, pump, control valves, relief valves, filter and reservoir

  • Slipping risk
  • Floor cleaning operation
  • In addition, maintenance of hydraulic system, regular checks and parts replacement time to time

No oil, no leaks

3 Replace hydraulic cylinders in multiple positions

1. Elevation height control requires a position sensor on the scissor or on the hydraulic cylinder

2. Elevation requires a secured stability and a lowering device at a safe speed in case of power failure

3. Steering system requires repeatable and reliable positioning with limited backlash plus a manual operation in case of power shut down

4. Pothole guard requires position feedback to control the engagement

5. Platform Horizontal movement or extension and locker requires an acknowledgment of the safe position reached.

replace hydraulics

4 Reduce battery recharging time

  • The AWP scissor is already electrified
  • The wheel drive is done by electrical motor on the wheel
  • The lift and steering systems use typically electrohydraulic solution, with poor efficiency and without electrical energy regeneration on the lift function, the main source of consumption
  • Large battery, so high cost
  • Long time to recharge the battery, so less uptime or need to have high power recharging stations

Reduce battery recharging time

Ewellix offer and value proposition

1 Aerial Work Platform scissor with Ewellix Electro Mechanical actuators

CAHB

2 CASM100 features for lifting

  1. Load up to 59 kN
  2. Stability up to 180 kN
  3. High safety and redundancy with back-up nut
  4. Position feedback via incremental or absolute sensors
  5. Manual lowering with preset speed
  6. High Efficiency with spur gears and ball screws
  7. Trunnion mount, T-bar, screw jack version
  8. 24 or 48 Volt Motor for mobile applications
  9. Stroke up to 2m depending on the load
  10. Speed up to 210 mm/s
  11. Environmental tests documented: mechanical, electrical, climatic IP54 to 65, -40 to 85°C,…
  12. Customizations: stroke, retracted length, cable, attachment

Casm100

3 Manual lowering system

FEATURES

  • Two brakes: 1 electro-mechanical and 1 centrifugal brake
  • Manual lowering operation through Bowden cable to unlock the brake and centrifugal brake to control the lowering speed
  • Reliable mechanical safety elements
  • Lowering operation like hydraulic systems
  • Self-controlled maximum down speed of the scissor

BENEFITS

  • Smooth and comfortable downwards motion
  • High safety through redundancy of components

Manual lowering system4 CAHB -2xE features for steering, pothole, platform

  1. Push and pull force up to 10 kN
  2. Stability 20 kN
  3. Over load force limitation
  4. Stroke up to 700 mm
  5. Speed up to 55 mm/s
  6. Low backlash to avoid floating steering
  7. Manual over ride option
  8. Position feedback via absolute analog position output or encoder
  9. Built in controller with monitoring and CANBus for the CASHB2xS version (new)
  10. Environmental tests documented: mechanical, electrical, climatic : IP69K/66M , -40 to 85 °C..
  11. Customizations: stroke, retracted length, force limitation, cable, attachment

cahb - 2xE

5 CAHB-2xS features for steering

  1. Push and pull force up to 10 kN, Stability 20 kN
  2. Electronic overload force limitation
  3. Stroke up to 700 mm
  4. Speed up to 55 mm/s
  5. Anti rotation tube and free spinning attachment
  6. Low backlash to avoid floating steering
  7. 12, 24 and 48 VDC version
  8. Manual override option
  9. Command by IO and CANBus SAE J1939
  10. Functions : parallel motion, adjustable endstop, …
  11. True absolute position : analog output or CANBus
  12. Off-board diagnostic and OnBoard diagnostic
  13. Environmental tests documented: mechanical, electrical, climatic : IP69K/66M , -40 to 85°C
  14. Customizations: stroke, retracted length, force limitation, cable, attachment

cahb - 2xs

6 CAHB-10 features for locker

  1. Push and pull force up to 1.5 kN
  2. Stability 1.5 kN
  3. Speed up to 56 mm/s
  4. Stroke up to 300 mm
  5. Position feedback via absolute analog position output or encoder
  6. Environmental tests documented: mechanical, electrical, climatic IP69K/66 , -40 to 85°C..
  7. Customizations: stroke, retracted length, cable, attachment

cahb-10

7 Tested for your environment

Ewellix’s expertise in mechanics and electronics, and specific application requirements contribute to the development of electromechanical actuators to meet the requirements of mobile machinery manufacturers. We verify our products by a comprehensive test plan that covers all regulatory and environmental requirements.

Mechanical tests

The actuators are used on mobile equipment, and we put them on different test benches to validate how they withstand vibration and shock on all three-axes.

Kiểm tra vibration đối với xi lanh điện

Climatic tests

The actuators are tested in a climatic test chamber that reproduces extremely low -40°C and high temperatures +85°C, and any possible variations, including humidity and corrosive atmospheres. Doing this ensures that all the functions and performance of the actuators are working as expected.

kiểm tra low-temperature đối với xi lanh điện electric actuator

Electrical tests

The actuators are tested with different test equipment that reproduces the electrical environment recommended by international standards, such as power supply, immunity to the electrostatic discharges, and electromagnetic compatibility during extreme cases, even during the transient mode typical on a vehicle.

emc

8 Summary of the Value proposition

key value points

ADDITIONAL VALUE POINTS

  • Quick delivery time for samples
  • Ability to replicate customer specification on test bench
  • Mass production with Global manufacturing
  • Lower Total Cost of Ownership

9 No oil, no leaks

No hydraulic cylinder means no hoses, no pump, no control valve, no relief valve, no filters and no reservoir.

Risk of leaks is fully eliminated

  • No slipping risk on floor
  • No floor cleaning operation

No maintenance related to oil management

  • No oil changes
  • No replacement hoses
  • No diaper changes

 No oil, no leaks

10 Complete range of E-M actuators for AWP

Solutions designed for AWP replacing all hydraulic cylinders

  1. Lift function
  • CASM up to 150 KN
  • Back up nut
  • Manual Lowering with speed control
  • Built-in position sensor (absolute or incr.)
  • Attachment point at the same position
  1. Steering function, pothole guard system
  • CAHB2xE up to 10 KN, stability 20 KN
  • Absolute analog position output
  • CAHB2xS with Built-in Controller, IO and CAN Bus, parallel motion function, ISO 25119 compliance (pending)
  1. Other auxiliary functions
  • Platform horizontal movement, locker

complete rangge11 Smart CAHB-2xS, simple with CAN bus or I/O

CAHB-2xS

smart for controlling by canbus

Steering system : Hydraulic versus CAHB-2xS

Steering system Hydraulic versus12 Energy recuperation example EMA vs EHA

Energy recuperation

Extra value points

  1. Quick delivery time for samples: 4 weeks for standard products
  2. Ability to run life-time test with customer specs
  3. Global mass production
  • Manufacturing in Europe, Asia and NAM
  • Ramp up of production capacity line to follow the market adoption
  • Capacity: over 10 000 Actuators Mid 2022

replicate13 Total Cost of Ownership – Real customer case

Assumptions

More uptime, no leakage, lower Total Cost of Ownership

With greater efficiency and electrical power recuperation from the regenerative lowering system, electromechanical actuators optimise the cost of batteries by increasing their uptime.

Better motion control and feedback will achieve greater productivity. Oil-free operation drastically reduces maintenance effort and eliminates the risk of oil leaks. All the above contributes to a decrease in the Total Cost of Ownership.

electromechanical

Customer support tools

customer support tools

The right tool for the optimal choice

We support our customers in selecting the optimal solution with our engineering tools for actuators, ball & roller screws and linear guides products.

Customers can get our suggestion for a technology or a product that fits their needs.

They can just use the performance calculation to validate the selection and download the correct CAD file to be used

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