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jounce bumper Mostly used for suspension and off-road / Trailer shock-absorbing system, insufficient support： Bottoming out too early, bumps and noise, vehicle body sinking, obvious bouncing, and limit failure， here, Bonproa Click "Low Cost Optimization" → Structural upgrade → "Supporting modification" provides solutions from easy to difficult：
1. Rapid emergency response / Low-cost rectification (try first)
1. Add spacers / Raising blocks
At the bottom of the buffer block and the frame / Hard rubber, nylon, and metal flat pads are installed on the swing arm joint surface to directly raise the height of the buffer block, contact the limit in advance, and make up for the support gap.
Main points: The thickness of the gasket is selected according to the actual measurement of the gap, left and right / Keep the coaxes consistent to avoid eccentric wear.
2. Replace high hardness buffer rubber of the same size
The main reason is that the original rubber pier is soft, so replace it with polyurethane with a higher Shore hardness ( PU） Material jounce bumper（ off-road / Trailer mainstream Material ）， Choose 60 hardness ~75 Shore A， Stronger rigidity, significantly improved support, and resistant to compression deformation.
3. Adjust suspension preload
If it is a coil spring / air suspension：
- coil spring: Increase spring preload, replace and thicken / Heighten and strengthen the spring to reduce suspension downward stroke and reduce buffer block load；
- air suspension: Appropriately increase the basic air pressure to reduce normal sinking.
2. Structural upgrade (to cure weak support, commonly used modification solutions)
1. increase / Extended integrated buffer block
Select Extended length, enlarged outer diameterof enhanced jounce bumper， Without changing the installation position, directly replace the original parts to increase the stress area. + Effective stroke improves overall load-bearing and support.
Adaptation scene: Heavy load, towing, off-road, frequent bumpy road conditions.
2. Double layer / Combined buffer structure
When the single rubber pier of the original vehicle does not support enough, use main buffer + Auxiliary small rubber pier Combination layout: An auxiliary buffer pier is installed next to the original vehicle limit point to share the pressure and limit the position in sections to avoid single-point overload collapse.
3. Reinforced mounting base
If the base sheet metal / The bracket is deformed and widened, which will weaken the support in disguise.：
- Welded reinforced brackets and thickened mounting base plates；
- Replace loose bolts / Bushing, add locknut to eliminate installation gap.
3. Severe working conditions (heavy load / off-road / Special for trailering)
1. Metal limit seat + Composite buffer glue
Steel limit stops are installed on the outside and matched on the inside. PU buffer glue, The metal is responsible for the hard limit, and the rubber pier is responsible for cushioning.， Completely solve the problem of insufficient soft rubber support and collapse.
2. Replacement of heavy-duty special complete suspension limit kit
Choose car companies directly / Modified brand matching Overload jounce bumper kit ， It includes reinforced rubber piers, heightened bases, and reinforced brackets. The complete set is matched and has the best load-bearing and limiting performance.
4. Precautions for avoiding pits
1. Increase height / Don’t overdo the hardening: The buffer block is very hard / If it is too high, the suspension travel will be sacrificed, the suspension will become stiffer on bad roads, and the comfort will drop sharply. A reasonable buffer gap should be reserved.
2. The left and right sides of the coaxial axis must be symmetrical: The height, hardness and gaskets are kept consistent to prevent the vehicle body from deflecting and being damaged by unilateral force.
3. preferred polyurethane PU Material ： It is more resistant to aging, compression and support than ordinary rubber. It is the first choice for auto parts buffer blocks.
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