RU203516U1 - Mining Harvester Cogwheel Bearing - Google Patents

Abstract

The utility model relates to the design of units of mining combines. The bearing support 1, located inside the gearbox housing, serves as a place for installing the rolling bearing 2, which in turn holds the shaft 6. On the shaft between the bearing 2 and the gears 3, cylindrical covers 4 are installed, the hubs of which serve as an emphasis for the inner race of the bearing 2, with one side, and an emphasis for the hubs of gears 3, on the other. O-rings 5 are installed in the grooves on the outer working surfaces of the covers 4, and the cavities of the bearing 2 are filled with grease. For normal operation of the covers 4, between the outer diameters of the covers and the inner diameter of the bearing support 1, a gap δ is provided, which guarantees free rotation of the covers in the support. EFFECT: preservation of the protective properties of the seal at any speed of rotation of the shafts.

Description

Technical field to which the utility model belongs

The utility model relates to the bearing arrangements of gearboxes used in roadheaders in the process of mining by underground mining.

State of the art

A large number of types of seals of bearing assemblies are known to protect against contamination and leakage of lubricant. For example: felt seals, lip seals, throat seals, oil drain grooves, labyrinth seals, sealing washers, and flinger rings. But all these types are either not able to hold liquid lubricant, or have large dimensions.

The closest solution adopted for the prototype is a rotating protective washer (p. 445, Chermensky ON, Fedotov NN, Rolling bearings. Directory catalog, M .: Mashinostroenie, 2003), installed on the shaft. The washer is used for any lubrication and speed exceeding 5 m / s. The protective effect of the washer is the higher, the higher the peripheral speed and the resulting centrifugal forces, which throw away lubricant and foreign substances. But this is the disadvantage of the prototype, in order to use such washers, a peripheral speed of more than 5 m / s is required, and this limits the possibilities of operation.

Disclosure of a utility model

The technical result of this utility model is the preservation of the protective properties of the seal at any speed of rotation of the shafts.

This is achieved by the fact that the bearing support of the gear wheel contains cylindrical covers, the outer working surfaces of which have grooves with sealing rings installed in them.

O-rings, installed in grooves on the outer working surfaces of the covers, create an additional seal between the covers and the body, thereby preventing the entry of the external environment even at low speeds of rotation of the shafts.

Description of drawings

The essence of the utility model is illustrated by graphic materials, which show:

FIG. 1 - Gear wheel bearing (section);

Implementation of the utility model

Bearing support 1 (Fig. 1), located inside the gearbox housing, serves as a place for the rolling bearing 2, which in turn holds the shaft 6. On the shaft between the bearing 2 and the gear wheels 3, there are cylindrical covers 4, the hubs of which serve as an emphasis for the inner cage bearing 2, on the one hand, and an emphasis for the hubs of gears 3, on the other. O-rings 5 are installed in the grooves on the outer working surfaces of the covers 4, and the cavities of the bearing 2 are filled with grease. For normal operation of the covers 4, a gap δ is provided between the outer diameters of the covers and the inner diameter of the bearing support 1, which guarantees free rotation of the covers in the support.

During the operation of the gearbox, the shaft 6 rotates around its axis and rotates with it the gears 3, the covers 4 and the bearing 2. The grease in the bearing cavity is scattered along the walls of the covers 4 and along the inner diameter of the support 1. Covers 4 and O-rings 5 ensure the tightness of the bearing cavities 2, preventing grease leaks and the ingress of contaminants.

It should be noted that the given configuration of the bearing arrangement of the gear wheel and its elements are a special case and can be executed in a different way, essential - are the very possibilities that such a configuration provides, and which, nevertheless, can be achieved by a number of other design features. Also, for the declared bearing support of the gear wheel in the form as it is described in the formula of the utility model, there is a possibility of manufacturing and application using means and methods known before the filing date of the application.

The claimed utility model can find wide application in the mining industry for rock excavation, in particular, on roadheaders used in mining by underground method.

Claims (1)

Bearing support of a gear wheel of a mining combine, characterized in that it contains cylindrical covers, the outer working surfaces of which have grooves with sealing rings installed in them.

Images