The mechanism of rotation of the platform earthmovers

 

(57) Abstract:

The invention relates to a sealing technique and can be used for sealing oil baths drives rotation of construction and road machinery. The purpose of the invention is to enhance reliability seal oil bath and durability of the sealing element. The seal mechanism of the swing excavator contains the gearbox with the engine mounted on the rotary platform. Leading gear kinematically connected to the fixed ring gear, which is located on the chassis frame on which is fixed an annular shell. The crown of the bottom sheet, the chassis frame and the body form an oil bath, which is oil. Leading gear is located in an oil bath. At the end of the shell is fixed curved sheet with emphasis. Between the sheet and the rotary platform X-shaped sealing element, with the possibility of self-talk and interaction in two planes. It is made of elastic material. The stop serves to prevent displacement of the sealing element from the sheet. 3 C. p. F.-crystals, 3 ill.

The invention relates to the mechanisms of rotation of the platform, enclosed in an oil bath, and can be used for g/P> Known sealing mechanism swing excavator, containing the gearbox with the engine mounted on the platform, a pinion gear mounted on the output shaft and kinematically associated with a gear wreath placed on the chassis, an oil bath, formed a ring gear, the ring sides, bottom and top plate and provided with a V-shaped sealing element.

This seal design of the rotation mechanism has a high complexity of manufacturing due to the fact that the design contains upper and lower leaf oil bath.

Known sealing mechanism swing excavator, containing the gearbox with the engine mounted on the rotary platform, a pinion gear mounted on the output shaft and kinematically associated with a gear wreath placed on the chassis, an oil bath, formed a ring gear, the bottom sheet of the chassis frame, the annular shell and the rotating platform at the end of the annular shell is stationary V-shaped elastic sealing element.

In this arrangement, the seal oil bath and sliding during rotation of the turntable is carried out on one the STI, that reduces its durability. Replacement of the sealing element during operation has a high complexity due to the fact that it is fixed to the ring the ring motionless. In addition, since the sealing element is stationary, he is not able to samoustraniajutsia.

The invention is directed to improving the reliability of the seal oil bath and durability of the sealing element.

This is achieved by the design of the mechanism of rotation of the platform earthmovers, comprising placed on the frame swivel bearing with a ring gear, a rotary platform mounted on it a gear on the output shaft with the gear kinematically connected with a ring gear rotatable support located in a closed housing with an oil bath, is X-shaped in cross-section of the mechanical sealing element of elastic material. This item is installed in pojetom state between the annular surfaces of the platform and frame with self-talk and interaction in two planes during movement of the platform relative to the frame.

When the rotation of the turntable is adjust to any misalignment of the X-obraznogo provides improved reliability seal oil bath.

The slide and the interaction of X-shaped element with the annular surfaces of the rotary platform and the frame is alternately depending on the magnitude of the friction force arising at the site of contact of the seal ring surfaces, i.e., the slip occurs alternately on the two surfaces. As a result, increases the durability of the sealing element. To prevent displacement of the X-shaped sealing element outside annular surfaces made emphasis in the form of a collar on the outer or inner side of the sealing element. In addition, the sealing element can be made reinforced.

The invention is illustrated in the drawing, where Fig. 1 shows the rotation mechanism earthmovers, elevation, and Fig. 2 with the clamp placed on the outer side of the sealing element of Fig. 3 with reinforced sealing element.

Position in the drawing indicate:

1 Reducer; 2 engine; 3 rotary platform; 4 gear; 5 - output shaft of the gearbox; 6 swivel bearing with a ring gear; 7 - frame; 8 - annular rings; 9 closed housing with an oil bath; 10 X-shaped sealing element of elastic matatalino element; 13 the annular sealing surface of the platform; 14 the emphasis in the form of a collar placed on the outer side of the sealing element; 15 reinforced sealing element.

The mechanism of rotation of the platform earthmovers contains placed on the frame 7 swivel bearing with a ring gear 6, the turntable 3, on which is fixed the gear 1. On the output shaft 5 of the gear 1 gear set 4, kinematically connected with a ring gear 6. On the lower sheet frame 7 is fixed annular shell 8. The fixed ring gear 6, the bottom sheet of the chassis frame 7 and the annular ring 8 to form a closed housing oil bath 9. Leading gear 4 and the gear 6 are placed in the housing with oil bath 9. At the end of the annular shell 8 is fixed a circular sheet with a focus in the form of a collar 12, which forms an annular sealing surface of the frame 11. The emphasis in the form of a collar 12 is located on the ring sheet on the inner side of the sealing element. Between the annular sealing surfaces of the frame 11 and the platform 13 is the end of the X-shaped in cross-section of the sealing element 10 of elastic material in pojetom condition with the possibility of self-talk and interaction in two annular ploskostnoi element 10 outside annular surfaces.

In the variant shown in Fig. 2, the emphasis in the form of a collar 14 is made on the annular sheet on the outer side of the sealing element 10.

In the variant shown in Fig. 3 shows a reinforced sealing element 15.

The seal mechanism of the swing excavator works as follows.

When turning on the engine 2 torque transmitted via the output shaft 5 of the gear 1 top gear 4. Gear 4, objetivas on a fixed toothed crown 6, causes the rotation of the platform 3 with the lubrication of the teeth.

X-shaped sealing element located between the sealing surfaces of the frame 11 and the platform 13, carries the seal oil bath 9 from leaking oil. This is achieved by the fact that the X-shaped sealing element during the rotation of the platform 3 samoustranyaetsya due to its elastic properties. Slide X-shaped element on the ring surfaces is carried out alternately on the annular surface 11 or 13 depending on the amount of friction between these surfaces.

1. The mechanism of rotation of the platform earthmovers, comprising placed on the frame rotate the gear set, kinematically connected with a ring gear rotatable support located in a closed housing with an oil bath having end sealing element of elastic material, characterized in that the end sealing element is designed X-shaped in cross section and is installed in pojetom state between the annular surfaces of the platform and frame with self-talk and interaction in two planes during movement of the platform relative to the frame, with the annular sealing surface of the rotary support has a stop in the form of a collar.

2. The mechanism under item 1, characterized in that the clamp placed inside the X-shaped sealing element.

3. The mechanism under item 1, characterized in that the clamp is located on the outer side of the X-shaped sealing element.

4. The mechanism under item 1, characterized in that the X-shaped sealing element is designed reinforced.

 

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