Auteur : xsjbearing

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The earliest custom universal joints were not used on cars, but on clocks. From 1352 to 1354, the universal joint drive shaft in the clock mechanism of Strasbourg Cathedral can be said to be the birth of the universal joint. Some people may wonder, why is there a universal joint in the clock? This is because the clock panel can be opened outwards like a door. During the opening process, universal joints are indispensable, and in the mechanical technology at that time, the flexible shaft has not yet been processed.

In fact, in 1550, the ring-type balanced suspension of the Geronimo cardano compass was the prototype of the universal joint. This is a very amazing design, especially in that era, a seemingly simple disc appearance, but has a complicated mechanical structure.

In 1663, the Robert hook universal joint was born; in 20 years, the double Hook universal joint was born. By 1824, jean victor poncelet used spherical trigonometry and differential calculus to help analyze the motion of the Hooke universal joint and calculate the force on the cross axis. In 1841, robert willis made a kinematic analysis of the double Hook gimbal, which was complete and scientific. In 1894, Carlbach made a calculation of the surface stress of the cross shaft. From 1901 to 1902, arthur hardt and robert schwenke’s patent for automobile universal joints, namely the double-linked Hooke universal joint, was used for automobile steering wheels. However, in 1904, the Hooke type universal joint drive shaft became a series of products. Since Benz’s Mercedes-Benz No. 1, the car basically has no steering drive wheels, so the universal joint is hardly used by the car. In 1908, the first ball universal joint was born. In 1923, it was discovered that the steering center of the fixed ball universal joint did not coincide with its own rotation center. In 1926, the uniform velocity universal joint was born. In 1927, the articulation angle of the six-ball fixed universal joint was forty-five degrees, and in 1934 it had a ball offset control. In 1928, the first journal that used needle roller bearings on the cross shaft of the Hooke universal joint was the « biped » joint. In 1933, ball universal joints with offset raceways appeared. In 1938, Robert Suczek used the offset principle of the telescopic ball joint. In 1946, the birfield elliptical race ball joint was put into mass production in 1959. In 1960, loebro circular raceway fixed universal joint was invented by aucktor willmek michel orain’s three-pivot universal joint. In 1961, henri faure’s four-ball telescopic universal joint with a pair of intersecting raceways. In 1962, Loebro’s VL universal joint with intersecting raceways was born. In 1965, the DO-telescopic gimbal of gaston devos was developed from the birfield gimbal with universal joint manufacturer and offset cage.

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custom universal joints can be used in many industries, and the use of universal joints can improve work efficiency. Cross-axis universal joints are very important components in the design and manufacture of automobiles. Universal joint balancing machines generally belong to horizontal hard support balancing machine series. Generally speaking, those rotors with rotating shafts or assembling process shafts, such as motor rotors, machine tool spindles, rollers, fans, steam turbines, supercharger rotors, etc., are all suitable for horizontal dynamic balancing machines.

Universal joint balancing machine is driven by universal coupling, and it is also a kind of universal joint, which can obtain a variety of balancing speeds, and this kind of universal joint has high precision, convenient operation and high working efficiency. Universal joint balancing machine is mainly used for balancing rotating workpieces such as large motors, machine tool spindles, fans, centrifuges, water pumps, internal combustion engines, wind wheels, ceramic machinery, rollers, glue sticks, etc.

Universal joint balancing machine has high sensitivity sensor, good linearity, durability and reliability; Secondly, the universal joint balancing machine has advanced electrical measurement system, friendly man-machine interface and complete functions. Thirdly, the universal joint balancing machine is usually calibrated once and used permanently, allowing extremely high initial unbalance; Fourthly, the special universal coupling transmission for the balancing machine has stable power transmission, fast starting and convenient operation; Fifthly, the universal joint balancing machine is suitable for the rotor excircle, which can not adopt the ring belt transmission device or requires a great transmission power. Finally, it has a professionally designed swing frame, which effectively transmits mechanical force, is firm and reliable, has small vibration resistance and good rigidity。

Universal joint balancer can balance the motor rotor, roller, machine tool spindle, multi-stage pump, fan impeller and other workpieces, which has a wide application range; universal joint for truck coupling transmission, stable power transmission; Applicable to the rotor excircle that can not adopt the ring belt transmission device or requires a large transmission power; One calibration and continuous use can allow extremely high initial unbalance.

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The squeaking sound when the universal joint for truck is working means that the universal joint is about to be damaged. First of all, make sure whether the drive shaft is properly installed, you can take it out to check whether the universal joint is intact. A universal joint is a connector that allows the use of a drive shaft

Or in any other way to operate at various angles, it must be sure to bend in two different directions. Generally, there are two cases of gimbal damage.

The first is that as time goes by, the longer the use of the universal joint, the longer the small needle roller bearings may wear. In this case, the connection of the universal joint will become loose or inclined, which will cause the universal joint The high-speed vibration of the knuckle may cause the car to make a hoarse sound when switching to the reverse mode. In this case, you can use a screwdriver to pry it off or replace the drive shaft.

The second is that the universal joint is damaged due to being stuck. This phenomenon usually occurs when the bearing is flooded. The needle bearing is rusted and the universal joint will stop moving in one or two directions. If this is the case, you need to replace the universal joint or grease.

In addition, you can purchase more replacement joints when purchasing the universal joint. Regular maintenance of the bearing can also extend the service life of the 5-153X GU1000 PRECISION 369 universal joint.

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The cross shaft 5-153X GU1000 PRECISION 369 universal joint can achieve constant speed transmission between the two shafts, that is, the output shaft of the transmission and the input shaft of the drive axle is conditional. First, the assembly guarantees that the driven fork of the first universal joint is in the same plane as the active fork of the second universal joint. However, when the non-independent suspension is used, the relative position of the transmission and the main speed reducer is constantly changing. This condition is difficult to meet, and the unequal speed can only be achieved as small as possible. Second, the design ensures that the angle between the two shafts of the first universal joint is equal to the angle between the two shafts of the second universal joint.

The unequal speed of the universal joint of the cross shaft means that the angular speed of the driven shaft is uneven in a week. If the driving shaft rotates at an equal angular speed, the speed of the driven shaft is fast and slow, that is, the angle of a single universal joint of the universal shaft is at an angle. Unequal speed of the transmission.

The working principle of the cross shaft type rigid universal joint refers to when the active fork is in a vertical position and the plane of the cross shaft is perpendicular to the active shaft. At this time, the linear velocity of the connection point a of the driving fork and the cross shaft and the connection point b of the driven fork and the cross shaft on the plane of the cross shaft are equal. When the velocity of the driven fork is projected on the plane of 3102-2201025 Russian universal joint cross axis, the drive fork is in a horizontal position, and the plane of the cross axis is perpendicular to the driven axis. The relationship between the speed projection of the active fork to the plane of the cross axis and the rotation speed of the main and driven shafts. The greater the intersection angle of the two shafts, the greater the speed, and the worse the unequal speed of the transmission shaft.

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U-Joint With Pressed Bearings refers to the mechanical structure that realizes the power transmission of different shafts by using ball connection, and is a very important component of automobile bearings. The combination of universal joint and transmission shaft is called universal joint transmission device.

In automobile transmission systems and other systems, in order to achieve the transmission of power between the rotating shafts where the axes intersect or the relative position often changes, a universal transmission device must be used. It is generally composed of a universal joint and a rolling mill bearing drive shaft, and sometimes has an intermediate support. It is mainly used for the universal joint, the front drive shaft, and the middle full-filled roller bearing to support the transmission and drive axle of the engine front and rear wheel drive cars. between. When the distance between the transmission and the drive joint bearing bridge is relatively long, the transmission shaft should be divided into two or even multiple sections, and an intermediate support should be added. Due to the deformation of the frame, it will cause the two transmission parts whose positions between the axes change. Between the transfer case and the drive axle or between the drive axle and the drive axle of a multi-axis driven automobile is between the engine and the transmission. Between cars with independent suspension and differential self-aligning ball bearings. The power output of the car between the differential of the steering drive axle and the wheels is equipped with a U-Joint With 4 Grooved Round Bearings and steering control mechanism.

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According to the different use environments of various bearings, the required sealability can also be different.

The inner ring of the Slotted Bearings is paired with the outer ring with a groove. After the sealing ring is assembled, the inner ring is not in full contact with the sealing ring, but it can resist the entry of dust and dirt, but it cannot completely resist the entry of foreign objects. In the slotted inner ring structure, the seal ring and inner ring are closely attached to each other after assembly, which can block more foreign objects. So as to ensure the service life and accuracy of the bearing.

However, strictly speaking, a completely sealed bearing does not exist, and there is relative rotation between the inner and outer rings of the bearing, which means that there must be a gap in the bearing. In terms of generalized sealing, bearings with ultra-high sealing capacity exist, and shaft seals or good sealing covers can be used to achieve the purpose.

The most commonly used sealing method is RSH contact sealing. In addition to the performance of the RSL low-friction seal mentioned, SKF contact seals also have the following characteristics. First, the second sealing lip can withstand high-pressure cleaning and prevent water from entering. When pressure is applied to the outside of the bearing, the contact pressure between this sealing lip and the opposite side of the seal increases, but the design of the sealing lip prevents the seal from pressing into the bearing. Second, for seals with bearings with an outside diameter greater than 25mm, there are radial slots at the conical junction. These can provide a contact area between the sealing lip and the opposing surface for proper lubrication. This can also extend Pressed Bearings life.