CN205331390U - Axle head seal positioning structure - Google Patents

Abstract

The utility model relates to an axle head seal positioning structure. Utilize the excircle of outer spiale and the movive seal between oil blanket realization pivot and box, inside epaxial in the gearbox with outer spiale axial fixity through locking dabber, snap ring and round nut, the round nut is equipped with with external betweencenters that the lock washer can prevent effectively that the round nut pine from taking off for the round nut simultaneously, it is sealed to be equipped with O type circle between the locking dabber and the external shaft fit face of cylinder. At the transmission phase with under the torque condition, the utility model discloses has the sealed size of littleer oil blanket to make the rotational speed allowable of axle very improve under the condition that the spiale is effectively sealed outside guaranteeing. O type circle does not receive the spinning shearing force, is difficult for damaging at the dismouting in -process, O type circle packing force is even, and sealed effect is more reliable.

Description

A kind of shaft end seal location structure

Technical field

This utility model relates to a kind of shaft end seal location structure。

Background technology

The output shaft of variator had both needed the power of transmission change speed gear box output, needed again to be axially fixed at the output shaft of variator, needed to ensure the sealing between rotating parts and non-rotating part simultaneously。For planet transmission, owing to assembling operability and convenience need, generally output shaft is divided into inner shaft and outer spindle two parts。Therefore between inner shaft and outer spindle, need axial positioning structure and static seal structure；Movable sealing structure is needed between rotating parts and non-rotating part。In recent years, along with high-speed drive, the greatly developing of electric transmission technology, the transmission rotation speed requirements of the variator matched is higher, and existing shaft end seal location structure is difficult to meet above-mentioned instructions for use。

The existing sealing location structure being applied to this kind of working condition is characterized by: be made up of outer spindle, inner shaft, bearing, oil sealing, O, plug screw and screw。Existing sealing location structure utilizes the cylindrical of outer spindle to realize sealing with oil sealing, is fixed on the inner shaft of change speed gear box by plug screw by outer spindle, and plug screw cloth last week screw is to prevent plug screw from getting loose, and plug screw seals equipped with O with external axial end。

The excircle dimension that existing shaft end seal location structure has oil sealing sealing is big, the deficiency of restriction rotating shaft sealing maximum speed allowable；Additionally, due to shear O during plug screw tightening, and the plug screw anglec of rotation is by set screw hole position limitation, and therefore O thrust is difficult to accurately control and easy to wear, thus affecting sealing reliability。

Summary of the invention

For the deficiency of existing scheme, the present invention provides a kind of shaft end seal location structure。

A kind of shaft end seal location structure includes outer spindle 2, inner shaft 1, bearing 6, snap ring 5, oil sealing 7, locking mandrel 3, O 4, round nut 8 and round nut stop washer 9, and wherein inner shaft 1 is installed in change speed gear box by bearing 6；On inner shaft 1, processing has internal spline and inner circle, and in outer spindle 2, processing has external splines and cylindrical, and outer spindle is connected with inner shaft internal spline, inner circle by external splines, cylindrical；Oil sealing 7 is coated with the cylindrical of outer spindle；On the internal spline of inner shaft, processing has annular groove, built-in snap ring 5, locking mandrel 3 is coordinated with inner shaft internal spline by its external splines, locking mandrel 3 traverse snap ring 5, outer spindle endoporus and round nut stop washer, on locking mandrel 3, processing has external screw thread, and round nut 8 is loaded on the external screw thread of locking mandrel；On locking mandrel, processing has O groove, O 4 to be loaded on this O groove, and fits with outer spindle endoporus；The processing of locking mandrel external screw thread place has draw-in groove, and round nut stop washer 9 internal projection snaps in the draw-in groove of locking mandrel。

Its operation principle is: utilize the movable sealing that the cylindrical of outer spindle and oil sealing realize between rotating shaft and casing；Being axially fixed on transmission internal axle by locking mandrel, snap ring and round nut by outer spindle, round nut and external between centers can effectively prevent round nut from getting loose equipped with round nut stop washer simultaneously；Locking mandrel coordinates with outer spindle between the face of cylinder equipped with O sealing。

The present invention is produced beneficial effect compared to existing technology:

I, under transmitting identical torque conditions, the present invention has less oil sealing sealing size, thus guaranteeing that outer spindle makes the allowable rotating speed of axle greatly improve when effectively sealing。

II, O is not by spinning shearing force, not easily damages in disassembly process；O thrust is uniform, and sealing effectiveness is more reliable。

III, easy to assembly, locking reliably。

Accompanying drawing explanation

Fig. 1 is shaft end seal location structure schematic diagram。

Detailed description of the invention

The primary efficacy of the present invention is realizing transmitting power at inner shaft and external between centers while, it is achieved the sealing of outer spindle and the axial restraint relative to inner shaft。Its operation principle is that inner shaft is installed on change speed gear box by bearing, and inner shaft is connected transmission power with outer spindle by spline, ensures external shaft run-out by the cooperation of inner circle and cylindrical；Outer spindle is by realizing rotatory sealing by oil sealing；This sealing location structure passes through round nut and locking mandrel by snap ring, inner shaft, external shaft locking, it is achieved the axial restraint of outer spindle relative interior axle；Locking mandrel and external between centers are sealed by O。

Claims (1)

1. a shaft end seal location structure, including outer spindle (2), inner shaft (1), bearing (6), snap ring (5), oil sealing (7), locking mandrel (3), O (4), round nut (8) and round nut stop washer (9), inner shaft (1) is installed in change speed gear box by bearing (6)；It is characterized in that, the upper processing of described inner shaft (1) has internal spline and inner circle, and the upper processing of outer spindle (2) has external splines and cylindrical, and outer spindle is connected with inner shaft internal spline, inner circle by external splines, cylindrical；Oil sealing (7) is coated with the cylindrical of outer spindle；On the internal spline of inner shaft, processing has annular groove, built-in snap ring (5), locking mandrel (3) is coordinated with inner shaft internal spline by its external splines, locking mandrel (3) traverse snap ring (5), outer spindle endoporus and round nut stop washer, the upper processing of locking mandrel (3) has external screw thread, and round nut (8) is loaded on the external screw thread of locking mandrel；On locking mandrel, processing has O groove, O (4) to be loaded on this O groove, and fits with outer spindle endoporus；The processing of locking mandrel external screw thread place has draw-in groove, and round nut stop washer (9) internal projection snaps in the draw-in groove of locking mandrel。