Bearing type overrunning clutch structure

Abstract

The invention discloses a bearing type overrunning clutch structure. The bearing type overrunning clutch structure comprises an outer ring and an inner star wheel; a plurality of rollers are arranged between the outer ring and the inner star wheel; an outer cylindrical surface of the inner star wheel is provided with a plurality of concave curve grooves; each concave curve groove respectively corresponds to a roller; and the gap s between adjacent rollers is between 0 and 0.2 mm. The bearing type overrunning clutch structure has the main characteristics that: the number of the rollers is increased in the same space to ensure that the gap between adjacent rollers is between 0 and 0.2 mm; meanwhile, the outer cylindrical surface of the inner star wheel is provided with a plurality of concave curve grooves, so that the contact strength is improved. Structurally, compared with a lifting pin roller type overrunning clutch, the bearing type overrunning clutch structure has the advantages that a spring lifting pin mechanism is removed, and compared with a three-feet spring-pushed spacer ring type overrunning clutch, the bearing type overrunning clutch structure has the advantage that: a three-feet spring and a spacer ring are removed. Experiments show that: the bearing type overrunning clutch structure has the advantages of rational structural design, simple manufacturing process, high manufacturing precision, high working reliability, and capability of bearing large torque and impact force, and working for a long time under high-speed heavy load.

Description

technical field [0001] The invention discloses a bearing-type overrunning clutch structure, belongs to the technical field of clutch manufacturing according to the International Patent Classification (IPC), and in particular relates to a novel structure of a loader two-shaft assembly overrunning clutch. Background technique [0002] An overrunning clutch, also known as a one-way clutch or one-way bearing, is a device that can only transmit power from one direction. The transmission is performed when the speed of the driving raceway is the same as that of the driven raceway, and when the speed of the driving raceway is less than that of the driven raceway, the driven raceway can rotate freely. [0003] The current overrunning clutches mainly include roller type overrunning clutches and sprag type overrunning clutches. Overrunning clutches are an extremely important part in the loader gearbox assembly. At present, most of the loader gearbox assembly adopts the traditional rol...

AI Technical Summary

Problems solved by technology

At present, most of the loader gearbox assembly adopts the traditional roller overrunning clutch. The general structure of the roller overrunning clutch is mainly composed of inner ring cam, roller, cylindrical spring, isolation ring and gland. When the clutch is combined, due to structural limitations and synchronization reasons, the number of effective rollers is small, and the working plane of the cam in the clutch inner ring is in line contact with the rollers. The surface compressive stress is too large to form arc craters, and the friction angle increases rapidly. Large, causing the clutch to slip and fail

Chinese patent document CN 2708031 discloses an overrunning clutch, which includes an outer ring, a star wheel, a roller and an elastic device. The slider slides on the star wheel together with the rollers, and engages with the inner wall of the outer ring under the push of the elastic device; in addition, Chinese patent document CN 101629606 provides a multi-roller overrunning clutch, which has at least six rollers, The inner star wheel outer ring, the cage and the spring leaf with the same number as the rollers, the cage is tightly fitted in the inner star wheel outer ring, the rollers are placed in the windows formed by the end ring and the beam, and are in the inner Each concave arc-shaped wedge surface of the star wheel outer ring; one end of the spring piece has an elastic bayonet, and the other end is a circular arc-shaped end that matches the outer circular surface of the roller. The elastic bayonet of the spring piece is buckled on the On the beam of the cage, the arc-shaped end matches with the roller and pushes the roller tightly. The above two roller overrunning clutches are limited by the structure, and the low load capacity and asynchronous operation are the most fatal problems.

Although the above-mentioned overrunning clutch ensures the synchronization during operation, due to the small radius of curvature of the wedge and the large gap between the cage and the wedge, the wedge is prone to tilt when loaded, so that the wedge and the inner and outer raceways There is a point contact between them, so the torque to bear is small

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