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Avoid the improvement of the drop of the output shaft of the reducer
Source: China Bearing Network Time: 2013-06-05
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At present, both domestic and international use high-speed or medium-speed hydraulic motor drive, with normal-closed disc type conflict brake or reverse speed reducer with normally open brake shoe brake; the reverse gear reducer output pinion lock on it There are two main ways to layout the equipment. They use countersunk screws or shaft retaining rings as the primary locking device. This type of layout can be weakened; the reason is; when the reducer is frequently reversed or machine accepted When the impact force is large, the countersunk screw will be loosened or the retaining ring will be disengaged; the output pinion of the reducer will fall, especially when the spline on the output pinion and the spline of the planetary carrier are stored. In the case of a large gap, the loosening of the countersunk screw and the detachment of the retaining ring are accelerated, and the pinions of the two devices are in a large and small shape; the forces on the points in the axial direction are uneven; Once the gear on the output pinion is stressed; because of the effect of the mast; the locking device will accept the large load, and; because the gap between the splines is unavoidable; therefore the wheel and the pinion are in the forward and reverse transformation During the process, there must be opposite work and axial clearance Whole inconvenient. These elements can lead to teeth falling of the shaft.
In order to avoid the falling of the output shaft of the reducer, we have improved the anti-loose device for the output shaft of the reverse gearbox; a thread is machined in the lower part of the output pinion spline; Nut 3 and retaining washer 2; use round nut to adjust the axial clearance of two single row tapered roller bearings. Through the above improvements; the selected reverse speed reducer layout comparison; has the following advantages:
1. The anti-loose equipment is reliable; it is not easy to present a loose appearance.
2. The axial spacing between the two bearings is increased. Because the rotary support of the reverse speed reducer is mainly supported by the two bearings on it; the distance between the two bearings is increased; the rotational stability of the reverse speed reducer can be increased. And the bearing capacity. The round nut is used to adjust the axial gap between the two bearings; the adjustment is convenient and reliable. It can ensure the normal operation of the reverse speed reducer.
3. The layout is simple; and the thread at the lower part of the output pinion spline is completed once when the output pinion is machined; the coaxiality of the two parts is ensured. The standard round nut can be used to ensure that the output pinion is together with the bearing and the wheel carrier. Transformation; therefore, manufacturing, equipment and convenience. Reverse gear reducer output pinion anti-drop equipment improvement 4, long service life. Improved anti-loose equipment has been used for more than two years; so far has not been found due to output pinion drop And the formation of the speed reducer.
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