Bevel gear reducer

　　A three-stage gear reducer employing bevel gears and helical gears.

　　Abstract

　　The present utility model relates to a three-stage gear reducer employing bevel gears and bevel wheels, comprising a housing, an input shaft, a gear shaft, a bevel wheel, and an output shaft. It is characterized in that the gear shaft includes a first gear shaft and a second gear shaft; the output shaft is driven in mesh with the first gear shaft via a bevel wheel, and the second gear shaft is driven in mesh with the output shaft via a bevel wheel; the first and second gear shafts are engaged via bevel gears; and the input shaft, gear shafts, and output shaft are mounted on the housing. This three-stage reducer utilizes the transmission between bevel gears and bevel wheels to achieve perpendicular power transmission between the input and output shafts. Compared with conventional worm‑gear reducers, this reducer offers advantages such as high load capacity, high transmission efficiency, compact size, a streamlined structure, and the ability to meet various installation requirements.

　　At present, with the rapid development of the market economy and modern industrialization, user demand for gear reducers is steadily increasing. Domestically, the majority of available reducer products are parallel‑shaft types, such as cycloidal planetary gear reducers and planetary gear reducers. As industrial technology advances, engineering applications are trending toward compact designs, material savings, and lightweight construction. Simultaneously, the market’s demand for motor‑direct‑coupled right‑angle gear reducers is growing, driving higher requirements for transmission torque, transmission accuracy, and speed ratios. However, existing worm‑gear right‑angle reducers, while capable of achieving perpendicular power transmission, suffer from drawbacks such as small size, low transmission efficiency due to limited torque capacity, and limited mounting options—shortcomings that can no longer meet the needs of today’s industrial development. Therefore, there is an urgent need to develop a right‑angle reducer that offers high load‑carrying capacity, a compact footprint, high transmission efficiency, and compatibility with multiple mounting configurations.

　　Summary of the Invention

　　The present utility model is designed to address the technical problems existing in the prior art, providing a high‑power orthogonal helical–bevel gear three‑stage reducer that features strong load‑carrying capacity, compact size, and high transmission efficiency, while accommodating various installation configurations.

　　The technical solution adopted by this utility model to address the technical problems existing in the prior art is as follows: a three-stage helical‑bevel gear reducer, comprising a housing, an input shaft, a gear shaft, helical gears, and an output shaft. The distinguishing features are as follows: the gear shaft includes a first gear shaft and a second gear shaft; the first gear shaft and the output shaft are driven in mesh by helical gears; the second gear shaft and the output shaft are also driven in mesh by helical gears; the first and second gear shafts are driven in mesh by bevel gears; and the input shaft, gear shafts, and output shaft are mounted on the housing.

　　The present utility model may also adopt the following technical solution:

　　The helical gears comprise a first helical gear, a second helical gear, a third helical gear, and a fourth helical gear. The input shaft is meshed with the first gear shaft via the first and second helical gears, while the second gear shaft is meshed with the output shaft through the third and fourth helical gears. Furthermore, the first gear shaft is meshed with the second gear shaft via a bevel gear and a driven bevel gear.

　　The input shaft, gear shaft, output shaft, helical gears, and bevel gears are all manufactured from low-carbon alloy steel.

　　The housing is made of cast iron.

　　The advantages and positive effects of this utility model are as follows: By adopting the technical solution described above, the device comprises a housing, an input shaft mounted on the housing, a gear shaft, and an output shaft. The gear shaft includes a first gear shaft and a second gear shaft; the first gear shaft is meshed with the input shaft via helical gears, while the second gear shaft is meshed with the output shaft through helical gears. Furthermore, the first and second gear shafts are interconnected via bevel gears. Thanks to the bevel‑gear transmission that enables perpendicular power transmission between the input and output shafts, this reducer exhibits high load‑carrying capacity. Compared with conventional worm‑gear reducers, it offers superior load capacity and higher transmission efficiency. In addition, the reducer of this utility model is compact in size and features a streamlined structure, making it suitable for various installation configurations.

　　Key components such as the reducer’s gears and gear shafts are made from high-quality low-carbon alloy steel with a hardened tooth surface. This significantly enhances the material’s strength, resulting in superior load-carrying capacity. Moreover, each gear stage is precision‑ground to ensure stable operation, low noise, high mechanical efficiency, long service life, and excellent reliability. The housing is constructed from high-strength cast iron, guaranteeing safe and dependable performance throughout the product’s service life.