Jinsheng High Platform Bogie Suspension - High Platform Single-Point Suspension with Spoke-Type Axle

Product Overview

This is a tandem running-gear assembly: two axles carried on two leaf springs, tied together through a central equalizer and bolted to the trailer frame. It is supplied as a complete high platform bogie suspension with spoke axle for heavy-duty trailers — axles, springs, seats, U-bolts, seals and bushes all counted and packed together, matched to one another instead of being sourced separately and made to fit on site. It suits trailers that earn their keep away from smooth tarmac: tipper and flatbed semi-trailers on construction haulage, mine and quarry support trailers, heavy agricultural rigs and site trailers that spend their life on rutted ground. The raised platform keeps the frame line and spring pack clear of the ground, and the spoked wheel ends take weight out of the axle without weakening it. As a bogie suspension supplier we keep the specification open: rated load, paint colour and bushing type are set with your order, not fixed by whatever happens to be on the shelf. Long-haul semi-trailers are the simplest case: on general freight work the equalizer keeps both axles sharing load, tyres wear more evenly and the trailer sits level at speed, which is usually the first thing a fleet notices after a change. Construction machinery transport is harder on running gear. Site trailers carrying excavator buckets, attachments and materials work on ground that is never flat, and clearance plus the controlled flex of the spoked wheel end is what lets the assembly take that duty without constant repairs. Mining vehicles face rock spillage, corrosive water and heavy loads. Painted steelwork, sealed hubs and a bush that can be replaced without cutting are what keep pit and quarry support trailers in service rather than in the workshop. Agricultural heavy-duty vehicles put a trailer on soft, ridged ground at low speed. The high platform bogie suspension deals with the clearance and the leaf springs deal with the load, which is the combination farm and yard work asks for. Trailer refurbishment and fleet replacement are the fifth case worth mentioning: workshops rebuilding a second-life trailer or replacing a tired bogie use the kit because the whole assembly arrives matched, so the job is measured, bolted and back on the road rather than fabricated from whatever was available.

Single-Point Suspension Technology

This high platform bogie suspension with spoke axle for heavy-duty trailers hangs from one central point. An equalizer sits on the frame, the two leaf springs hang from it and each spring carries one axle. When a wheel rides up over a rut or a ridge, the equalizer rocks and passes part of that movement across to the other axle instead of pushing it straight into the chassis. The trailer stays level, both axles keep working and the frame takes far less of a beating.

That geometry changes three things for the people running the trailer. It evens out tyre load, so the leading axle of the pair stops wearing faster than the trailing one. It resists roll, because the body has to push the central pivot hard before it leans. And it simplifies the frame interface — one mounting point to set and one equalizer to inspect, rather than a row of separate hangers that all have to line up on the same plane.

It also decides how the kit is specified. Bracket height and mounting centres have to agree with your chassis drawing, and the spring set has to match the load the trailer actually carries. Send the drawing with the enquiry and those numbers are checked before the order is released to production.

Routine attention is modest. The spring caps are the grease points, and the equalizer nut and pin are the parts worth looking at when the trailer is up on the pit. Everything else in the bogie is a bush, a pad or a fastener, and every one of them appears in the component list further down this product.

Spoke-Type Axle Construction

A spoke-type axle, sometimes called a wire-spoked axle, carries its load through high tensile steel spokes laced under tension between the hub and the rim seat. Wire under tension is an efficient way to hold weight: the wheel end stays stiff radially, so the tyre keeps its shape, while the spokes allow a small and controlled amount of flex.

On the road that flex behaves like a second, much smaller spring. Potholes, rut edges and spoil on a site road are absorbed at the wheel before they reach the spring pack and the trailer floor — which matters when the load is machinery, or a tipper body that is already taking a hammering.

The second benefit is mass. Because the spokes carry the load rather than a heavy solid hub, unsprung weight at each wheel end comes down. A lighter wheel end follows uneven ground more readily and keeps the tyre in contact instead of skittering over it.

That combination is why this high platform bogie suspension with spoke axle for heavy-duty trailers is chosen for site and quarry duty rather than a solid-hub assembly. It is not a light-duty part dressed up: the spokes are high tensile steel and the assembly is rated across the same working band as the rest of the range.

Two practical notes when specifying. First, the hub and rim interface has to suit the wheels and tyres you run — send the wheel specification with the enquiry and it is checked against the assembly before production. Second, at service, look at spoke condition and rim seating alongside the usual bearing and seal checks; a slack or bent spoke shows itself long before it becomes a roadside failure.

Kit Contents

• Equalizer welding assembly – 1 pc
• Oil seal seat – 2 pcs
• Oil seal – 2 pcs
• Oil seal seat collar – 4 pcs
• Composite bush – 4 pcs
• Leaf spring – 2 pcs
• Leaf spring pad – 4 pcs
• Upper pad – 4 pcs
• Axle – 2 pcs
• Down pad – 4 pcs
• Small U-bolt nut – 32 pcs
• Big U-bolt assembly – 4 pcs
• Cap – 2 pcs
• Clip ring – 2 pcs
• Nut pin – 2 pcs
• Equalizer nut – 2 pcs
• Central rotating seat – 2 pcs
• Leaf spring upper pad – 2 pcs
• Big U-bolt nut – 16 pcs
• Leaf spring rubber seat – 4 pcs
• Central mounting seat – 4 pcs
• Small U-bolt – 8 pcs
• One kit carries two axles and two leaf springs, which is the complete tandem assembly — nothing else has to be ordered to hang it.
• Every trailer suspension kit is counted against this list before it is packed; hand tools and lifting gear are not part of the kit.
• Everything that moves on this high platform bogie suspension is a separate, listed component rather than a welded-in assembly, which is what keeps wear manageable. The four composite bushes and the equalizer nut and pin carry the pivot movement; the four leaf spring pads, four upper pads, four down pads and four rubber seats take the compression and the grit; the two oil seals and their seats are what site dirt reaches first. Each of them appears by name and quantity on the 22-item component list, so a replacement is identified by position rather than made up in the workshop. Wear announces itself before it stops a trailer. A dull clunk from the centre over yard bumps, axles that no longer sit level under load, shoulders wearing unevenly across the pair, or rust weeping past an oil seal seat all point at bushes, pads and seals. A pry bar on the equalizer and a torch on the seal seats during a pit inspection will find most of it while the fix is still a bush and an afternoon. Replacement is planned as workshop work. Bushes press out of the equalizer and spring eyes, pads and rubber seats lift out once the U-bolts are released, and a Brsaa bushing goes in as a straight swap for the composite item without altering the equalizer. Springs come out with the axle on a stand, and the big and small U-bolt assemblies go back with new nuts. Parts stay available for the life of the unit. Replacement components for this trailer suspension kit are supplied as a matter of course, and your build specification is held on file, so a bush set ordered two or three seasons later still matches the kit built at 24t or 32t with the bushing option you chose. Name the part from the component list and confirm the rated load the kit was built at, and the correct item is picked. Wear parts listed with the original order travel in the same consignment, which is quicker and cheaper than a second shipment once the trailer is working, and questions about what has worn or what to reorder go to the same team that specified the kit.

Bolt-On Assembly

1. Lay the trailer suspension kit out and count it against the component list before anything goes under the trailer — pads, collars and U-bolts are easy to mix up between positions.
2. Check the frame against your drawing: mounting centres, bracket height and the flatness of the mounting faces, with any scale or loose paint cleaned off the contact areas.
3. Fit the central mounting seats to the frame and set the equalizer welding assembly at the centre point.
4. Hang the leaf springs, seating them on the rubber seats with the leaf spring pads and upper pads in position.
5. Offer up each axle, locate it on the spring seat with the central rotating seat and cap, then fit the clip ring and nut pin.
6. Fit the big U-bolt assemblies and the small U-bolts with their nuts, tightening in stages in a cross pattern to the torque figure your workshop uses for that stud size.
7. Fit the oil seals, seal seats and collars, and fit the composite bushes — or the Brsaa bushes if that option was specified on the order.
8. Grease the spring caps and equalizer points, then touch up any paint damaged during fitting before the trailer goes back into service.
9. After the first loaded run, re-check U-bolt torque, equalizer nuts and wheel-end play, and correct anything that has settled.

Chassis & Wheel Fitment

• Measure the frame, not the build sheet. Tape the mounting centres along the frame, the bracket height that sets ride height, and the frame width across the mounting faces. Note anything already bolted in the way — air tanks, toolboxes, mudguard brackets — because the equalizer needs a clear, sound face to sit against. - Fix the track at the wheel ends. Give the centre-to-centre distance you need across the tyres, measured on level ground with the wheels you intend to run. Size is built to your order alongside rated load, paint colour and accessories, so this figure travels with the drawing instead of being assumed. - Match the spoke hub to the rim. A spoke-type axle seats the rim on a spoked hub, so the wheel has to suit it. Send rim size, tyre size, stud pattern and PCD with the enquiry and the hub-to-rim interface is checked before anything is cut. - Check clearance through the full spring travel. On a raised platform the frame line sits higher, but the tyres still move up. Confirm the gap between tyre and deck, between tyre and spring pack, and between the two axles at the equalizer — mudguards and bump stops included. - Respect the tandem layout. This is a two-axle bogie on a single central pivot. It suits a trailer built for a tandem set at those centres; it is not the way to convert a single-axle trailer, or to bridge frame hangers that sit at a different spacing. - Check the centre cross-member. The equalizer welding assembly carries both springs, so the frame needs a sound mounting face and, where the cross-member is light, local reinforcement planned before the trailer is stripped. - Let us cross-check it. Send the chassis drawing, the wheel and tyre specification and the payload figure. Mounting centres, bracket height, track and hub interface are compared against them, and any conflict is flagged before the order is released to our manufacturing partner.

High Platform Clearance

• Construction haul roads. Ruts, spoil and offcuts are exactly where the extra height pays back. The frame line and spring pack clear ground that a standard platform drags over, which is the working this high platform bogie suspension is specified for most often.
• Mining and quarry floors. Rock spillage and uneven floors punish anything hanging low. The raised line keeps the springs out of the strike zone and stops the axle bottoming out on the frame.
• Farm tracks and field gateways. Ridged tracks, soft patches and gateways that hold water — clearance plus spring travel keeps the trailer moving without grounding the deck half a metre from the gate.
• Yard and ramp work. Kerbs, fuel bunds, loading ramps and workshop pits all sit below the frame line on a raised platform, so the driver has margin when manoeuvring in tight, cluttered space.
• Clearance that survives loading. The extra height is built into the mounting rather than added on top of it, so the gap does not close up when the springs compress under a full load.
• Built for off-road duty. The platform height is the main reason buyers choose this assembly over a lower bogie for sites, quarries and field work — it is a working suspension, not a highway part used off the tarmac.

Specifications

- Alloy steel where the load goes. Brackets, equalizer, mounting seats and the U-bolt assemblies are high-quality alloy steel, selected for fatigue strength rather than raw hardness — these parts flex millions of times in service, and brittle steel fails quietly. - High tensile spokes. The wheel-end spokes carry load in tension, which is how the axle stays light without becoming the weak point of the assembly. - Composite or brass bushes. The kit ships with composite bushes; the optional Brsaa bushing is brass-based and chosen where vibration is constant and joint clearance has to hold. - Anti-corrosion paint. Steelwork is painted before dispatch in the colour set on the order, so the kit arrives protected rather than in bare primer that rusts in the container. - Matched fasteners. U-bolt assemblies and their nuts are supplied together with the rest of the hardware, so thread and finish match throughout. - Certified manufacturing. The suspension is produced by our long-term manufacturing partner to ISO/TS 16949, with inspection running through the process rather than applied only at the end of the line. - Site care that pays back. Wash salt, fertiliser and slurry off the underside when the trailer comes in, and touch up chipped paint before rust gets under it. A painted bogie stays serviceable; a rusted one turns every future bush change into a cutting job.

Customization Options

The rated load is set with the order, anywhere from 24t to 32t. Choose by the heaviest load the trailer will legally carry, not by the average: a kit at the bottom of the band on a trailer that regularly runs near the top will spend its life at its ceiling, while the largest build on a trailer that never passes 26t carries steel it does not need.

Bushing choice is a duty question. The composite bush in the kit does the job on general haulage and mixed running. The optional Brsaa bushing is brass-based: it damps vibration through the joints, holds clearance better where the trailer is constantly shaken over rough ground, and replaces as a straight swap when it eventually wears. Specify it for site, quarry and heavy agricultural work.

Paint colour is open. Match the trailer, match a fleet livery, or pick something bright that makes inspection easier under a dirty chassis — the anti-corrosion paint goes on before dispatch either way.

OEM/ODM work is how most of our trailer-builder customers start. We act as a bogie suspension supplier on terms where size, load capacity, colour and accessories are built to your requirement, confirmed against your drawing before anything is cut. Send the drawing, the rated load and the wheel specification, and the build is checked against those three points first.

What stays constant is the shape of the trailer suspension kit: two axles, two leaf springs and one equalizer per set, with the pads, U-bolts, seals and bushes that go with them.

Ordering & Delivery

• What to send with the order. Rated load, paint colour, bushing choice and a chassis drawing showing mounting centres and bracket height — those four decide the build.
• Packing. Components are given anti-rust treatment and foam protection and packed in export cartons on wooden pallets, so seals, bushes and fasteners arrive as clean as they left.
• Shipping. Sea freight as FCL or LCL, air freight or rail, chosen to suit the destination and how urgently the kit is needed on the line.
• Lead time. Typically 15 to 30 days, depending on order quantity and how far the build departs from standard — confirm the slot with your sales contact when the order is placed.
• Delivery. Consignments ship worldwide with our freight partners, and tracking information is passed on once the goods are moving.
• After-sales. Technical support by message or phone for fitting and fault questions, with a reply inside 24 hours, plus spare-part supply and maintenance guidance for the life of the unit.
• Repeat orders. As a bogie suspension supplier we keep your kit specification on file, so a second order placed months later is built to the same numbers as the first.
• Payment, shipping terms and warranty cover are confirmed with your sales contact at the time of order.

Technical Support & Model Matching

Specification questions should not hold up an order. Send us your drawing, load rating and mounting dimensions, and our team will confirm the right model and configuration, cross-check it against the unit it will go on, and flag anything that needs changing before the order is released to our manufacturing partners. After delivery we stay involved: fitting and commissioning guidance, fault diagnosis, spare-part identification, and customisation coordinated with those long-term partners. Every enquiry is answered within 24 hours, and clear warranty terms sit behind the supply.

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