Hypoid gearboxes are a type of spiral bevel gearbox, with the difference that hypoid gears have axes that are non-intersecting and not parallel. Quite simply, the axes of hypoid gears are offset in one another. The basic geometry of the hypoid equipment is hyperbolic, instead of having the conical geometry of a spiral bevel gear.
In a hypoid gearbox, the spiral angle of the pinion is bigger than the spiral angle of the gear, so the pinion diameter could be bigger than that of a bevel gear pinion. This provides more contact area and better tooth strength, that allows more torque to become transmitted and high equipment ratios (up to 200:1) to be utilized. Since the shafts of hypoid gears don’t intersect, bearings can be used on both sides of the gear to provide extra rigidity.
The difference in spiral angles between the pinion and the crown (bigger gear) causes some sliding along the teeth, but the sliding is uniform, both in the direction of the tooth profile and longitudinally. Thus giving hypoid gearboxes very soft running properties and quiet operation. But it also requires special EP (severe pressure) gear oil to be able to keep effective lubrication, because of the pressure between the teeth.
Hypoid gearboxes are usually utilized where speeds exceed 1000 rpm (although above 8000 rpm, surface gears are recommended). Also, they are useful, however, for lower velocity applications that want extreme smoothness of movement or quiet operation. In multi-stage gearboxes, hypoid gears tend to be used for the result stage, where lower speeds and high torques are required.
The most typical application for hypoid gearboxes is in the automotive industry, where they are found in rear axles, specifically for huge trucks. With a still left-hand spiral position on the pinion and a right-hand spiral angle on the crown, these applications possess what is known as a “below-center” offset, which allows the driveshaft to become located lower in the automobile. This lowers the vehicle’s middle of gravity, and perhaps, reduces interference with the interior space of the vehicle.
Informasi Hypoid Gears
A gigi hypoid is a method of spiral bevel equipment whose primary variance is that the mating gears’ axes do not intersect. The hypoid equipment can be offset from the apparatus center, allowing exclusive configurations and a huge diameter shaft. One’s teeth on a hypoid gear are helical, and the pitch surface is best referred to as a hyperboloid. A hypoid equipment can be considered a cross between a bevel equipment and a worm drive.
Hypoid gears have a large pitch surface area with multiple points of contact. They can transfer energy at almost any angle. Hypoid gears have huge pinion diameters and so are useful in torque-challenging applications. The heavy function load expressed through multiple sliding equipment teeth means hypoid gears have to be well lubricated, but this also provides quiet procedure and additional durability.
Hypoid gears are common in truck drive differentials, where high torque and an offset pinion are valued. However, an offset pinion will expend some mechanical performance. Hypoid gears are very strong and can offer a large gear reduction. Because of their exclusive set up, hypoid gears are typically produced in opposite-hand pairs (left and correct handedness).
Gears mate via the teeth with very specific geometry. Pressure angle is the angle of tooth drive actions, or the position between the type of power between meshing the teeth and the tangent to the pitch circle at the idea of mesh. Regular pressure angles are 14.5° or 20°, but hypoids sometimes operate at 25°. Helix angle may be the angle at which the apparatus teeth are aligned when compared to axis.
Selection tip: Gears will need to have the same pitch and pressure position to be able to mesh. Hypoid equipment arrangements are typically of opposing hands, and the hypoid gear tends to have a larger helical angle.
The offset nature of hypoid gears may limit the length that the hypoid gear’s axis may deviate from the corresponding gear’s axis. Offset drives should be limited by 25% of the of the mating gear’s size, and on seriously loaded alignments should not go beyond 12.5% of the mating gear’s diameter.
Aksesoris Gear Hypoid
To handle the sliding actions and heavy function loads for hypoid gears, high-pressure gear oil is necessary to reduce the friction, temperature and wear on hypoid gears. This is particularly true when used in vehicle gearboxes. Treatment should be taken if the gearing includes copper, as some high-pressure lubricant additives erode copper.
Oli Roda Gigi Hypoid
Persyaratan aplikasi sangat disarankan dengan mempertimbangkan beban kerja dan lingkungan peralatan.
Power, velocity and torque consistency and result peaks of the gear drive so the gear meets mechanical requirements.
Zhuzhou Gear Co., Ltd. founded in 1958, is definitely a subsidiary of Weichai Power and an integral enterprise in China equipment industry.Inertia of the gear through acceleration and deceleration. Heavier gears could be harder to avoid or reverse.
Precision dependence on gear, including gear pitch, shaft diameter, pressure angle and tooth layout. Hypoid gears’ are often created in pairs to make sure mating.
Handedness (sudut gigi kiri atau kanan) tergantung sudut drive. Roda gigi hypoid biasanya diproduksi berpasangan kiri-kanan.
Gear lubrication requirements. Some gears need lubrication for simple, temperate procedure and this is especially accurate for hypoid gears, that have their very own types of lubricant.
Persyaratan pemasangan. Aplikasi dapat membatasi posisi poros roda gigi.
Noise limitation. Commercial applications may worth a clean, quietly meshing equipment. Hypoid gears offer calm operation.
Corrosive environments. Gears exposed to weather or chemicals should be specifically hardened or protected.
Temperature publicity. Some gears may warp or become brittle in the face of extreme temperatures.
Vibration and shock resistance. Heavy machine loads or backlash, the deliberate surplus space in the circular pitch, may jostle persneling.
Operation disruption resistance. It may be necessary for some gear sets to operate despite missing tooth or misalignment, especially in helical gears where axial thrust can reposition gears during make use of.
Gear composition depends upon application, including the gear’s service, rotation swiftness, accuracy and more.
Cast iron provides durability and simple manufacture.
Alloy steel provides excellent sturdiness and corrosion resistance. Minerals may be added to the alloy to help expand harden the gear.
Baja tuang memudahkan fabrikasi, beban kerja yang kuat, dan ketahanan getaran.
Carbon steels are inexpensive and strong, but are vunerable to corrosion.
Aluminum is used when low equipment inertia with some resiliency is necessary.
Kuningan tidak mahal, mudah dibentuk dan tahan korosi.
Tembaga mudah dibentuk, konduktif dan tahan korosi. Kekuatan gigi akan meningkat jika perunggu.
Plastic is usually inexpensive, corrosion resistant, calm operationally and will overcome missing teeth or misalignment. Plastic is much less robust than metal and is susceptible to temperature adjustments and chemical substance corrosion. Acetal, delrin, nylon, and polycarbonate plastics are common.
Jenis bahan lain seperti kayu bisa ideal untuk aplikasi individu.