RU2779654C1 - Mechanism for fastening the bearing supports of the conveying screw device of the combine harvester - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to agriculture. The mechanism for fastening the bearing supports of the conveying screw device of the combine harvester contains a housing, bushings, a bearing assembly mounted on the end surface of the bushings, and elements of fixing the bearing assembly on the housing. Flanges and a cover plate between two flanges are installed on the inner and outer sides of the housing. The inner diameter of the lining is combined with the inner diameter of the flange hole, and the inner diameter of the lining is smaller than the inner diameter of the flange hole, but no less than the diameter of the shaft passing through the lining. The size of the radial gap between the shaft and the inner diameter of the lining does not exceed the minimum grain size. The bushings are located between the outer flange and the bearing assembly. The flanges, bushings and bearing assembly are fixed to the housing by means of a bolted connection.

EFFECT: productivity of the combine harvester is increased, grain losses are reduced, the design is simplified and the service life of the bearing supports is increased.

7 cl, 2 dwg

Description

The claimed invention relates to agricultural engineering and is intended for use in the design of transporting auger devices of combine harvesters.

Known mechanisms for fastening bearing supports transporting auger devices of combine harvesters "Vector" [Combine harvester self-propelled PCM-101 "Vector". Manual. - Rostov-on-Don: KZ Rostselmash LLC, 2019] and ACROS [Combine self-propelled grain harvester PCM-142 ACROS. Manual. - Rostov-on-Don: KZ Rostselmash LLC, 2019], including a housing, a bearing support installed by a centering shoulder into the housing bore on its outer side, a bearing cover installed on the inner side of the housing and aligned with the housing holes and bearing support, and elements for fixing the bearing support and the bearing cover on the housing.

The disadvantage of these devices is the low reliability of the bearing support, namely, the violation of the tightness of the bearing (destruction of the seal) due to stuffing of plant residues between the bearing cover and the bearing seal when harvesting crops in difficult conditions, in conditions of heavy weediness and humidity, which leads to leakage lubrication, to the ingress of foreign objects (dust, dirt, water, etc.) into the bearing housing, and, as a result, failure of the bearing support and the structure as a whole.

Known mechanisms for fastening bearing supports transporting auger devices of combine harvesters CLAAS TUCANO 480 - 320 [Repair Guide. - 00 0290 212 5 - RHB TUCANO 480-320 - 10/2013. CLAAS KGaA mbH Postfach 1163 33416 Harsewinkel - Germany, site www.claas.com], including a housing, a bearing assembly mounted on the outer side of the housing on bolts located on the housing and rigidly fixed on the housing, and elements for fixing the bearing assembly on the housing , at the same time, in the place where the bearing assembly fits to the housing, a forging is made from the outside in the form of a C-shaped contour, on the surface of which the bolts for installing the bearing assembly are symmetrically located.

The disadvantages of these devices are the formation of large gaps in the connection between the central hole of the body and the surface of the shaft passing through the central hole of the body, which leads to an increase in grain losses when harvesting small seeds and other crops, the grain of which is less than or equal to the resulting gap; limited access to cleaning the space between the bearing seal and the housing sidewall due to stuffing of plant residues when harvesting crops in difficult conditions, in conditions of heavy weeds and humidity, which leads to the need to dismantle the bearing assembly, reducing the main working time and, as a result, to reduce the productivity of the grain harvester harvester.

Closest to the claimed invention is a mechanism for fastening bearing supports transporting auger devices combine harvesters CLAAS LEXION 770 - 620 [Repair Guide. - 00 0291 413 3 - RHB LEXION 770-620 - 12/2011. CLAAS KGaA mbH Postfach 1163 33416 Harsewinkel - Germany, site www.claas.com], which includes a housing, a cover with welded bushings, fixed on the surface of the housing with bolted connections, a bearing assembly mounted on the end surface of the bushings, and elements for fixing the bearing node on the cover, and on the inner surface of the bushings is threaded.

The disadvantages of this device are the high complexity of manufacturing a cover with bushings due to the precise positioning of the bushings relative to the central hole of the cover and the bushings relative to each other, followed by machining (carving in the bushings); the formation of large gaps in the connection between the central opening of the cover and the surface of the shaft passing through the central opening of the cover, which leads to an increase in grain losses when harvesting small seeds and other crops, the grain of which is less than or equal to the resulting gap, and, as a result, to a decrease in the productivity of the grain harvester harvester.

The objective of the claimed invention is to increase the productivity of the combine harvester, reduce grain losses, simplify the design and increase the service life of the bearings.

To achieve the specified technical result, flanges installed on the inner and outer sides of the housing are introduced into the mechanism for fastening the bearing supports of the transporting auger device of the combine harvester, containing a housing, bushings, a bearing assembly mounted on the end surface of the bushings, and elements for fixing the bearing assembly on the housing, and lining installed between two flanges, while the inner diameter of the lining is aligned with the inner diameter of the flange hole, and the inner diameter of the lining is less than the inner diameter of the flange hole, but not less than the diameter of the shaft passing through the lining, and the value of the radial clearance between the shaft and the inner diameter of the lining does not exceed the minimum grain size, while the bushings are located between the outer flange and the bearing assembly, and the flanges, bushings and bearing assembly are fixed on the housing by means of a bolted connection. The outer diameter of the lining is less than the diameter of the body opening, while the lining is made with the possibility of its radial movement between the flanges. The thickness of the lining is equal to the thickness of the body wall. The lining and the outer flange are installed with a guaranteed axial clearance relative to the end face of the bearing assembly. Flanges made of sheet metal have the shape of flat triangles with rounded edges along the tops, while the tops are evenly spaced along the outer contour, at the same distance from each other and are connected to each other by convex faces, and holes are made at the tops of the plates, which are spaced apart from the center to the same distances. The overlay is made of polyamide material in the form of a ring and has a flat round shape. The lining is made removable, with the possibility of its replacement during operation.

Thanks to these innovations, they achieve a simplified design, an increase in the service life of bearing supports, a reduction in grain losses due to the introduction of a polyamide lining into the design, and, as a result, an increase in the productivity of a combine harvester.

The claimed invention is illustrated by drawings:

- fig. 1 - general view of the installation of the bearing unit in isometry;

- fig. 2 is a general view of the installation of the bearing assembly in section.

The claimed invention contains the following structural elements (see Fig. 1, 2): 1 - screw; 2 - body; 3 - flange; 4 - bushing; 5 - bearing assembly; 6 - overlay; 7 - bolt; 8 - nut; 9 - washer, - at the same time, flanges 3 are installed on the screw 1, located in the housing 2, located on the inner and outer sides of the housing 2, the pad 6, located between the inner and outer flanges 3, and the bearing assembly 5, installed through the bushings 4 on the outer flange 3, while the flanges 3, bushings 4 and bearing assembly 5 are fixed on the housing 2 with bolts 7, nuts 8 and washers 9. The lining 6 is installed with a minimum clearance relative to the screw shaft 1. The outer flange 3 and the lining 6 are installed with guaranteed axial clearance relative to the end of the bearing unit 5, and the axial clearance is provided by installing bushings 4 of the appropriate length.

The inventive device operates as follows (see Fig. 1, 2).

When harvesting various crops, the technological mass enters the auger 1, while the turns of the auger 1 belt actively capture the technological mass and drag it along the body 2. Since there is a guaranteed axial gap between the body 2 and the end of the screw belt, which prevents the turns of the auger 1 belt from rubbing against the body 2, the technological mass accumulates in the resulting radial gap between the screw shaft 1 and the inner flange 3. Since a pad 6 is installed between the inner and outer flanges 3 with a minimum radial clearance relative to the screw shaft 1, and the value of the minimum gap does not exceed the minimum allowable grain size, this the passage of the technological mass into the radial gap between the lining 6 and the shaft of the screw 1 is excluded, as a result of which grain losses are reduced, and the life of the bearing assembly 5 is increased.

The technical result consists in simplifying the design, in increasing the service life of the bearing supports, in reducing grain losses due to the introduction of a polyamide lining into the design, and, as a result, in increasing the productivity of the combine harvester.

Claims (7)

1. The mechanism for fastening the bearing supports of the transporting auger device of a combine harvester, containing a housing, bushings, a bearing assembly mounted on the end surface of the bushings, and elements for fixing the bearing assembly on the housing, characterized in that flanges installed on the inner and outer sides of the housing are introduced into it , and a lining installed between two flanges, while the inner diameter of the lining is aligned with the inner diameter of the flange hole, and the inner diameter of the lining is less than the inner diameter of the flange hole, but not less than the diameter of the shaft passing through the lining, and the value of the radial clearance between the shaft and the inner the lining diameter does not exceed the minimum grain size, while the bushings are located between the outer flange and the bearing assembly, and the flanges, bushings and the bearing assembly are fixed on the housing by means of a bolted connection. 2. The fastening mechanism according to claim 1, characterized in that the outer diameter of the lining is less than the diameter of the body opening, while the lining is made with the possibility of its radial movement between the flanges. 3. The fastening mechanism according to claim 1, characterized in that the thickness of the lining is equal to the thickness of the body wall. 4. The fastening mechanism according to claim 1, characterized in that the pad and the outer flange are installed with a guaranteed axial clearance relative to the end face of the bearing assembly. 5. The fastening mechanism according to claim 1, characterized in that the flanges made of sheet metal are in the form of flat triangles with rounded edges along the tops, while the tops are evenly spaced along the outer contour, at the same distance from each other and are connected to each other by convex faces, and on the tops of the plates there are holes that are spaced from the center at equal distances. 6. The fastening mechanism according to claim. 1, characterized in that the pad is made of polyamide material in the form of a ring and has a flat round shape. 7. The fastening mechanism according to claim 1, characterized in that the pad is made removable.

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