German reifenhaus springs reifenhaus models reifenhaus prices

reifenhaus springs are helical springs that withstand compressive forces. The cross-section of the material used is mostly circular, but rectangular sections and multi-strand steel wires are also used. Springs generally have equal pitch. The shapes of compression springs include cylindrical, conical, convex, concave, and a small number of non-circular shapes. There is a certain gap between the coils of a compression spring. When subjected to external loads, the spring contracts and deforms, storing strain energy. Compression springs provide resistance to external compressive loads. Compression springs utilize multiple open coils to provide resistance to external loads (such as gravity pressing down on wheels, or body weight pressing on a mattress). That is, they push back to resist external pressure. Compression springs are generally wound with equal pitch from metal wire and have a fixed wire diameter. In addition, there are conical compression springs, or springs combining conical and straight sections. Depending on the application area, compression springs can be used to resist pressure and/or store energy. Round metal wire is the most commonly used for compression springs, but compression springs are also made from square, rectangular, and specially shaped metal wires.

reifenhaus spring installation and removal

Hydraulic hand pallet trucks are widely used in production. During maintenance of their hydraulic pumps, we found that the pressure spring responsible for returning the piston rod of the hydraulic pump and the pressure arm of the truck has a wire diameter of n and a stored spring force reaching 1000N, making its installation and removal very difficult. This often delays fault elimination time, directly affecting production progress. Some measures were taken, but the results were unsatisfactory. Therefore, I designed a pressure spring installation/removal tool as shown in Figure 1. The tool consists of a lower pressure lever 1, pressure blocks 10, connecting pins 14, nuts 1, spherical washers 12, upper pressure lever 13, positioning sleeves 16, and levers. During operation, rotate the nut 11 to an appropriate position so that the cylindrical head claw of the lower pressure lever 1 contacts the vehicle body 2. Two pressure blocks 10 press symmetrically on the washer 6. Rotate the tightening nut n to pull the tie rod 15, causing the upper pressure lever 13 and lower pressure lever 1 to move relative to each other, forcing the pressure spring to compress. When the washer 6 separates from the cylindrical pin 7, the pressure wheel axle 9, pressure wheel 8, and cylindrical pin 7 can be removed. At this point, loosen the nut 11, remove the installation/removal tool, and take out the pressure spring to disassemble, inspect, and repair the hydraulic pump. The positioning sleeve 16 on the installation/removal tool is a key component. During manufacturing, one end has an internal spherical surface with a slot hole in the middle, and the other end has an inclined flat surface. It has an interference fit with the pressure lever. It is required to have good contact with the spherical washer 12 and the ball head of the lever 15. The pressure block 10 and connecting pin 14 have a clearance fit, requiring flexible rotation. The connecting pin 14 and upper pressure lever 13 have an interference fit. The connecting shaft 18 and pressure lever have a clearance fit.

reifenhaus spring structure and principle

The torsion bar spring itself is a torsion bar made of spring steel. The cross-section of the torsion bar is usually circular, with a few being tubular or rectangular. Its ends can be shaped as splines, square, hexagonal, or cylindrical with flat surfaces, etc., so that one end can be fixed to the vehicle frame and the other end to the suspension arm, which is connected to the wheel. One end of the torsion bar spring is fixed to the vehicle frame, while the other end is connected to the wheel via the suspension arm. When the wheel encounters an obstacle on the ground and bounces upward, it drives the suspension arm to rotate around the axis of the torsion bar by a certain angle, causing the torsion bar to undergo torsional deformation (elastic deformation). At the same time, the elastic energy stored in the torsional deformation of the torsion bar will be released when the wheel leaves the obstacle, allowing the force transmission mechanism and the wheel to quickly return to their original positions. During the manufacturing of torsion bar springs, the torsion bar is pre-twisted to create a permanent torsional deformation, giving it a certain level of prestress. The direction of the pre-applied twist is the same as the direction of twist during operation when installed on the vehicle, aiming to reduce actual stress during use and extend its lifespan. Note that left and right torsion bars are not interchangeable.

reifenhaus spring precautions

Due to product structure limitations, multi-strand springs generally have the characteristics of high strength and good performance. The material is required to guarantee final performance in terms of spring strength and toughness. During the processing of multi-strand springs, attention should be paid to: 1, support coils can use either cold coiling or hot coiling methods according to product requirements. When using the hot coiling method, heating the spring to the point of sparking or whitening is not allowed; the temperature for silicon-manganese steel must not exceed 850℃. The support coils and active coils must have effective contact, and the gap must not exceed 10% of the nominal inter-coil gap. 2, the characteristics of multi-strand springs can be determined by adjusting the lead, and the strand pitch can be adjusted as necessary during winding. The twist pitch can be 3~14 times the wire diameter, but generally 8~13 times is preferred. The spring force is also closely related to the free height, closed end coils, outer diameter, and wire properties, and can be changed by adjusting one or several of these items. 3, springs without support coils and springs with excessively thin wire diameters should not have welded ends, but the end strands should not be obviously loose and burrs should be removed. For multi-strand springs requiring welded heads, the length of the welding part should be less than 3 times the strand diameter (maximum not greater than 10 mm). The heating length should be less than one coil, and it should be polished smooth after welding. During gas welding, the welding part should undergo local low-temperature annealing. 4, spring surface treatment generally involves phosphating, but other treatments can also be performed. If zinc or cadmium plating is required, hydrogen removal treatment must be performed after electroplating. After hydrogen removal, extract 3% (no fewer than 3 pieces) for re-testing of set treatment; no fractures are allowed during re-testing. Springs should be cleaned of surface dirt, salt marks, and oxide scale, using methods such as sand blasting or gasoline cleaning, but acid pickling is not allowed. 5, the compression holding time for important springs is 24 hours, and for ordinary springs it is 6 hours or continuous compression 3~5 times, holding for 3~5 seconds each time. During compression, the gap between the spring and the mandrel should be 10% of the mandrel diameter; if the gap is too small, operation is difficult, and if too large, the spring is prone to bending deformation. If one spring breaks during compression, the others should be reprocessed.

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