Shenzhen Cadro Hydraulic Equipment Co.,Ltd
Views: 220 Author: cadrotaillift Publish Time: 2025-05-07 Origin: Site
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Tail lifts are essential mechanical systems for loading/unloading cargo on trucks, vans, and specialized vehicles. This guide covers the design, materials, and assembly steps for constructing a basic tail lift, emphasizing safety and functionality.
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Mechanical Linkage Systems
Tail lifts rely on planar four-bar linkage mechanisms to achieve stable vertical translation. A parallelogram configuration ensures the platform remains horizontal during lifting. Hydraulic cylinders drive the motion, synchronized on both sides of the vehicle chassis for balanced force distribution[3].
Hydraulic Actuation
Dual hydraulic cylinders control the lift and tilt motions. The "rollover" movement (platform rotation from vertical to horizontal) is managed by a separate cylinder system, while the lifting action uses synchronized cylinders connected to a four-bar linkage[3][5].
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Aluminum Alloys
Lightweight aluminum (e.g., AlMg4.5Mn0.7) is preferred for its high strength-to-weight ratio, corrosion resistance, and recyclability. Automated MIG welding with argon shielding ensures durable joints[4].
Steel Components
Critical load-bearing parts like hinges and bolts require high-tensile steel to withstand stress. Galvanized coatings prevent rust in humid or salt-exposed environments[4].
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1. Frame Assembly
- Weld the parallelogram linkage arms (OA, AC, CD, OD) using robot-assisted MIG welding.
- Attach hydraulic cylinder mounts to the vehicle chassis, ensuring alignment with the linkage[3][4].
2. Platform Construction
- Cut aluminum sheets to form the deck, reinforced with crossbeams.
- Install safety features: anti-slip surfaces, foldable side rails, and toe guards[2][5].
3. Hydraulic System Installation
- Connect dual cylinders to the four-bar linkage.
- Integrate a pump, control valves, and emergency stop mechanisms.
- Use hydraulic hoses rated for ≥250 bar pressure[3][5].
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Load Testing
- Conduct static tests at 125% of maximum rated capacity (e.g., 1,250 kg for a 1,000 kg lift).
- Verify smooth operation across full lift cycles (0°–90° tilt, ground-to-bed height)[2][5].
Emergency Features
- Install manual lowering valves and mechanical locks.
- Add sensors to detect overloads or misalignment[5].
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Chain Tensioning
- Adjust anchor bolts to level the platform within 6 mm of the truck bed.
- Tighten locknuts to specified torque values after alignment[2][5].
Hydraulic Checks
- Monitor oil levels with the platform closed.
- Inspect seals and hoses monthly for leaks[5].
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1. Why use aluminum for tail lifts?
Aluminum reduces weight by ~40% compared to steel, increasing payload capacity and fuel efficiency[4].
2. How are hydraulic cylinders synchronized?
Parallel linkage systems and matched flow control valves ensure equal force distribution[3].
3. What safety certifications are required?
CE marking (EU) or ANSI MH28.1 (US) compliance for load capacity and stability[2].
4. How to adjust platform height?
Modify chain tension via anchor bolts-5 mm of adjustment shifts the platform 5 mm vertically[2].
5. Can tail lifts be retrofitted?
Yes, but chassis reinforcement and professional welding are mandatory for structural integrity[4].
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[1] https://www.reddit.com/r/flying/comments/ib6fzo/how_is_lift_created_on_the_tail/
[2] http://www.hiab-bel.com/images/del/docs/del_im_column-lifts.pdf
[3] https://www.theseus.fi/bitstream/10024/58036/1/Hu_Wenting.pdf
[4] https://www.migal.co/en/about-us/baer-cargolift
[5] https://www.ladebordwand-ersatzteile.de/en/tail-lift-blog/Adjusting-the-tail-lift---this-is-how-you-do-it-correctly/
[6] https://part-serv.com/product-category/tail-lift-parts/
[7] https://www.youtube.com/watch?v=wYgBQxpwEAo
[8] https://www.powermatics.com/wp-content/uploads/2022/03/PHE-TL-TL-OMM-2022-R05.pdf
[9] https://transtech.co.za/what-are-the-main-components-of-a-tail-lift-truck/
[10] https://www.tuskerchv.com/blog/components-of-hydraulic-tail-lift/
[11] https://www.parts4taillifts.com/products/runners-related-parts.html
[12] https://www.palfinger.com/en/products/tail-lifts
[13] https://haco-parts.com/wiki/basic-structures-of-the-tail-lift/
[14] https://www.youtube.com/watch?v=3cjy4su_llA
[15] https://www.youtube.com/watch?v=-ugDuCarhw4
[16] https://www.hiab.com/uk/brands/zepro/zepro-parts-and-service-documents
[17] https://forum.progressionproject.com/t/lift-tail-tips-for-dw/239
[18] https://www.youtube.com/watch?v=RvxWve6hhg4
[19] https://aviation.stackexchange.com/questions/78518/how-can-an-up-lifting-tail-have-normal-force-direction-and-gradient-when-generat
[20] https://www.forum.cessna170.org/forums/viewtopic.php?t=16056
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